Grooving system and grooving method

Abstract

The present disclosure provides a groove processing system and a groove processing method capable of reducing the work burden of a worker who processes a rope groove. In the groove processing system, a processing tool movable device (6) moves a processing tool (5) relative to a rope groove (108a) by receiving supply of electric current. An electric current measurer (3) generates a signal corresponding to vibration generated by the processing tool (5) when processing the rope groove (108a) as a measurement signal. A groove processing control section (2) generates waveform data indicating a waveform of the vibration based on the measurement signal, determines whether the processing tool (5) generates chatter based on the waveform data, and, in the case where it is determined that the processing tool (5) generates chatter, changes the rotational speed of a driving sheave (108) by controlling an operation control device (106).

Description

Technical Field

[0001] This disclosure relates to a groove machining system and a groove machining method. Background Technology

[0002] Patent document 1 discloses a groove processing system in which the processing force of the groove processing device for processing the rope groove of the pulley is suddenly increased, and the processing position of the groove processing device on the rope groove is controlled according to the total amount of the processing force of the groove processing device and the rotation angle of the pulley.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-114067 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the conventional groove machining system disclosed in Patent Document 1, when machining the rope groove of the pulley using the groove machining device, chattering sometimes occurs in the groove machining device due to resonance. When chattering occurs in the groove machining device, a striped pattern forms on the finished surface of the rope groove, deteriorating the condition of the finished surface. Therefore, if chattering occurs in the groove machining device, it is difficult to continue operating the groove machining device, reducing the work efficiency of the operator when machining the rope groove. Consequently, the workload of the operator increases.

[0008] This disclosure is intended to solve the aforementioned problems, and its purpose is to provide a groove processing system and method that can reduce the workload of operators processing rope grooves.

[0009] Methods for solving problems

[0010] The groove machining system disclosed herein comprises: a machining tool that, while the workpiece sheave is rotated under the control of an operation control device, processes the rope groove by contacting the inner surface of a rope groove formed on the outer periphery of the workpiece sheave; a movable device for the machining tool that moves the machining tool relative to the rope groove by receiving a current supply; a groove machining control unit that controls the current supplied to the movable device for the machining tool; and a measuring unit that generates a signal corresponding to the vibration generated by the machining tool during rope groove machining as a measuring signal, the groove machining control unit generates waveform data representing the vibration waveform based on the measuring signal, determines whether the machining tool has generated chatter based on the waveform data, and, if chatter is determined to have occurred, controls the operation control device to change the rotational speed of the workpiece sheave.

[0011] Furthermore, the groove machining method disclosed herein includes: a measurement step, wherein a measurement unit generates a signal corresponding to vibration as a measurement signal, the vibration being the vibration generated by the machining tool when the machining object rope wheel is rotated under the control of a rotation control device, and the machining tool contacts the inner surface of the rope groove formed on the outer periphery of the machining object rope wheel to machine the rope groove; a determination step, wherein waveform data representing the vibration waveform is generated based on the measurement signal, and the groove machining control unit determines whether the machining tool has generated chatter based on the waveform data; and a rope wheel rotation control step, wherein the rotational speed of the machining object rope wheel is controlled based on the determination result in the determination step, and if it is determined in the determination step that the machining tool has generated chatter, the rotational speed of the machining object rope wheel is changed in the rope wheel rotation control step.

[0012] Invention Effects

[0013] According to the groove processing system and method disclosed herein, it is possible to reduce the workload of operators processing rope grooves. Attached Figure Description

[0014] Figure 1 This is a structural diagram of an elevator representing the groove processing system of implementation method 1.

[0015] Figure 2 It means in Figure 1 The diagram shows the state of the groove processing system of Embodiment 1 installed in the elevator.

[0016] Figure 3 It means Figure 2 A diagram illustrating the structure of the groove machining system.

[0017] Figure 4 It means Figure 3 A block diagram of the structure of the groove machining system.

[0018] Figure 5 It is a schematic representation in Figure 3 A side view of the state in which chatter occurs in the machining tool when the speed of the drive pulley is the reference speed n0.

[0019] Figure 6 It is a schematic representation of passing through Figure 5 The front view of the inner surface of the rope groove after processing with the machining tool.

[0020] Figure 7 It means Figure 5 A graph showing the relationship between the acceleration 'a' of a machining tool and time 't'.

[0021] Figure 8 It is a schematic representation Figure 5 A side view of the machining tool's state when the drive pulley rotates at a low speed n1.

[0022] Figure 9 It is a schematic representation of passing through Figure 8 The front view of the inner surface of the rope groove after processing with the machining tool.

[0023] Figure 10 It means Figure 8 A graph showing the relationship between the acceleration 'a' of a machining tool and time 't'.

[0024] Figure 11 It means by Figure 4 The graph shows the relationship between the current value I measured by the current measuring device and the frequency f of the current I.

[0025] Figure 12 This indicates that it will be passed by... Figure 11 The control unit generates a bandpass filter that corrects the current value. When the current is supplied to the movable device of the machining tool, the curve of the relationship between the current value of the current I measured by the current measuring device and the frequency f of the current I is shown.

[0026] Figure 13 It means by Figure 11 A graph illustrating the characteristics of a bandpass filter generated by the control unit.

[0027] Figure 14 It means by Figure 4 The graph shows the relationship between the current value I measured by the current measuring device and time t.

[0028] Figure 15 It means Figure 4 The curve showing the relationship between the current I supplied by the control unit to the movable device of the machining tool and time t.

[0029] Figure 16 This means controlling the main body. Figure 15 The graph shows the relationship between the current value of I measured by the current measuring device and time t when the current I is supplied to the movable device of the machining tool.

[0030] Figure 17 It means through Figure 3 A flowchart of the groove machining method when machining rope grooves using a groove machining system.

[0031] Figure 18 This is a structural diagram showing the state of the groove processing system of Embodiment 2.

[0032] Figure 19 It means Figure 18 A diagram illustrating the structure of the groove machining system.

[0033] Figure 20This is an explanatory diagram showing the structure of the groove processing system in Embodiment 3.

[0034] Figure 21 It means Figure 20 A block diagram of the structure of the groove machining system.

[0035] Figure 22 It means by Figure 21 The graph shows the relationship between the value of acceleration a measured by the accelerometer and the frequency f of acceleration a.

[0036] Figure 23 This indicates that it will be passed by... Figure 21 The control unit generates a bandpass filter that corrects the current value. The curve shows the relationship between the acceleration value 'a' measured by the acceleration sensor and the frequency 'f' of acceleration 'a' when the current is supplied to the movable device of the machining tool.

[0037] Figure 24 It means by Figure 21 The graph shows the relationship between the acceleration value 'a' measured by the accelerometer and time 't'.

[0038] Figure 25 This indicates that it was measured by the accelerometer. Figure 24 The graph shows the relationship between the current I supplied by the control body to the movable device of the machining tool and time t when the acceleration a is 0.

[0039] Figure 26 It means through Figure 20 A flowchart of the groove machining method when machining rope grooves using a groove machining system.

[0040] Figure 27 This is an explanatory diagram showing the structure of the groove processing system in Embodiment 4.

[0041] Figure 28 This is a schematic diagram showing the state of the cutting tool tip in the groove machining system of Embodiment 5 machining the rope groove of the drive pulley.

[0042] Figure 29 This is a structural diagram of the first example of a processing circuit that implements the functions of the slot processing control unit in each embodiment.

[0043] Figure 30 This is a structural diagram of a second example of a processing circuit that demonstrates the functions of the slot processing control unit in each embodiment.

[0044] Label Explanation

[0045] 2: Groove processing control unit; 3: Current measuring device (measuring unit); 5: Processing tool; 5a: Cutting tip; 6: Movable device of processing tool; 104: Traction machine; 105: Deflector wheel (processing object rope wheel); 105a: Rope groove; 106: Operation control device; 108: Drive rope wheel (processing object rope wheel); 108a: Rope groove. Detailed Implementation

[0046] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In the drawings, identical or equivalent parts are labeled with the same reference numerals, and repeated descriptions are appropriately simplified or omitted. Furthermore, the present disclosure is not limited to the following embodiments; any modifications or omissions of any constituent elements of the embodiments are permitted without departing from the spirit of the present disclosure.

[0047] Implementation method 1.

[0048] In Implementation 1, an example of applying the slot processing system to an elevator will be described. Figure 1 This is a structural diagram of an elevator using the slotting system of Embodiment 1. A machine room 102 is provided at the top of the hoistway 101. The machine room 102 is equipped with a support platform 103, a traction machine 104, a deflector wheel 105, and an operation control device 106.

[0049] The support platform 103 is fixed to the floor of the machine room 102. The traction machine 104 and the deflector wheel 105 are supported on the support platform 103.

[0050] The traction machine 104 has a traction machine body 107 and a drive pulley 108. The drive pulley 108 is positioned on the traction machine body 107 such that its axis is horizontal. The drive pulley 108 is rotatable relative to the traction machine body 107 about its axis.

[0051] The traction machine body 107 has a motor. The motor of the traction machine body 107 is a drive device that generates a driving force to rotate the drive sheave 108. By supplying current to the motor of the traction machine body 107, the drive sheave 108 is rotated relative to the traction machine body 107.

[0052] The operation control device 106 is a control device for controlling the operation of the elevator. The operation control device 106 controls the speed of the drive sheave 108 by controlling the current supplied to the motor of the traction machine body 107.

[0053] The deflector pulley 105 is positioned away from the drive pulley 108. The deflector pulley 105 is positioned below the drive pulley 108 and offset horizontally from it. The deflector pulley 105 is configured such that its axis is parallel to the axis of the drive pulley 108. The deflector pulley 105 is rotatable relative to the support platform 103 about its axis.

[0054] On the outer periphery of the drive sheave 108, a plurality of rope grooves 108a are formed along the circumferential direction of the drive sheave 108. The plurality of rope grooves 108a are arranged in a direction along the axis of the drive sheave 108. In this embodiment, the cross-sectional shape of each rope groove 108a in the plane including the axis of the drive sheave 108 is arc-shaped. Hereinafter, the cross-sectional shape of the rope groove 108a in the plane including the axis of the drive sheave 108 will be simply referred to as the "cross-sectional shape of the rope groove 108a".

[0055] On the outer periphery of the deflector 105, a plurality of rope grooves 105a are formed along the circumferential direction of the deflector 105. The plurality of rope grooves 105a are arranged in a direction along the axis of the deflector 105. In this embodiment, the cross-sectional shape of each rope groove 105a in the plane including the axis of the deflector 105 is arc-shaped. Hereinafter, the cross-sectional shape of the rope groove 105a in the plane including the axis of the deflector 105 will be simply referred to as the "cross-sectional shape of the rope groove 105a".

[0056] Multiple ropes 109 are continuously wound on a drive pulley 108 and a deflector pulley 105. The multiple ropes 109 are inserted into multiple rope grooves 108a in the drive pulley 108 and into multiple rope grooves 105a in the deflector pulley 105. In the drive pulley 108, each rope 109 contacts the inner surface of each rope groove 108a, thereby generating friction between the inner surface of each rope groove 108a and the rope 109. In the deflector pulley 105, each rope 109 contacts the inner surface of each rope groove 105a, thereby generating friction between the inner surface of each rope groove 105a and the rope 109.

[0057] A car 110 is connected to one end of each rope 109, and a counterweight 111 is connected to the other end of each rope 109. The car 110 and the counterweight 111 are suspended in the hoistway 101 by multiple ropes 109.

[0058] When the drive sheave 108 rotates relative to the traction machine body 107 under the driving force of the motor of the traction machine body 107, each rope 109 moves according to the rotation of the drive sheave 108. As a result, the car 110 and the counterweight 111 move vertically within the hoistway 101. The deflector sheave 105 rotates in conjunction with the rotation of the drive sheave 108 via the rotation of each rope 109.

[0059] Here, as the elevator continues to operate, the inner surfaces of the rope groove 108a of the drive sheave 108 and the rope groove 105a of the deflector sheave 105 gradually wear due to contact with the rope 109. If the wear of each rope groove 108a and 105a intensifies, the cross-sectional shape of each rope groove 108a and 105a deforms, and the contact state between the inner surface of each rope groove 108a and 105a and the rope 109 changes. As a result, the wear of the rope 109 is easily accelerated, and the lifespan of the rope 109 is shortened.

[0060] The groove processing system of this embodiment regenerates the cross-sectional shape of the rope groove 108a, which has been deformed due to wear, into the designed shape by processing the rope groove 108a of the drive rope pulley 108. Therefore, in this embodiment, the rope pulley that is processed by the groove processing system, i.e., the processing target rope pulley, is the drive rope pulley 108.

[0061] Figure 2 It means in Figure 1 The diagram shows the state of the groove processing system of Embodiment 1 installed in the elevator. Figure 3 It means Figure 2 The diagram illustrates the structure of the groove processing system. When the groove processing system processes the rope groove 108a of the drive sheave 108, each rope 109 is removed from the drive sheave 108. Therefore, in this embodiment, the groove processing system is installed in the machine room 102 with each rope 109 removed from the drive sheave 108.

[0062] The groove machining system includes a groove machining unit 1, a groove machining control unit 2, and a current measuring device 3.

[0063] The grooving unit 1 is mounted on the support platform 103 via the mounting member 4. The mounting member 4 is detachable from the support platform 103. Thus, the grooving unit 1 is mounted on the support platform 103 in a detachable manner. The grooving unit 1 is positioned radially outward from the drive pulley 108.

[0064] The groove processing unit 1 has a processing tool 5 and a movable device for the processing tool 6.

[0065] The machining tool 5 has a cutting tip 5a. The machining tool 5 is configured such that the cutting tip 5a faces the rope groove 108a of the drive pulley 108. In this embodiment, a lathe tool is used as the machining tool 5. Furthermore, in this embodiment, as... Figure 3 As shown, the tip 5a is an arc shape with an outer diameter that is the same as the machined inner diameter of the rope groove 108a.

[0066] The machining tool 5 contacts the inner surface of the rope groove 108a while the drive pulley 108 is rotating, thereby machining the rope groove 108a. During machining of the rope groove 108a by the machining tool 5, the rotation of the drive pulley 108 is controlled by the operation control device 106. The cutting tip 5a of the machining tool 5 contacts the inner surface of the rope groove 108a. When the cutting tip 5a of the machining tool 5 contacts the inner surface of the rope groove 108a while the drive pulley 108 is rotating, the cutting tip 5a of the machining tool 5 cuts into the inner surface of the rope groove 108a, thus cutting the inner surface of the rope groove 108a. As a result, the rope groove 108a is machined, and the cross-sectional shape of the rope groove 108a is regenerated.

[0067] A movable processing tool 6 is mounted on mounting component 4. A processing tool 5 is mounted on the movable processing tool 6. The movable processing tool 6 moves the processing tool 5 relative to the rope groove 108a by receiving an electric current supply. In this embodiment, the movable processing tool 6 moves the processing tool 5 relative to the rope groove 108a in two mutually perpendicular directions, namely the X direction and the Z direction. The X direction is aligned with the axis of the drive sheave 108. The Z direction is aligned with the radius of the drive sheave 108, i.e., the radial direction of the drive sheave 108.

[0068] The machining tool movable device 6 has an X-direction movable part 61, a Z-direction movable part 62, and a power generation part 63.

[0069] The X-direction movable part 61 is mounted on the mounting member 4. The X-direction movable part 61 can move relative to the mounting member 4 in the X direction. The direction of movement of the X-direction movable part 61 relative to the mounting member 4 is limited only to the X direction.

[0070] The Z-direction movable part 62 is mounted on the X-direction movable part 61. Therefore, the Z-direction movable part 62 can move along the X-direction relative to the mounting member 4, integrally with the X-direction movable part 61. Furthermore, the Z-direction movable part 62 can move along the Z-direction relative to the X-direction movable part 61. The direction of movement of the Z-direction movable part 62 relative to the X-direction movable part 61 is limited only to the Z-direction.

[0071] The machining tool 5 is fixed to the Z-direction movable part 62. Therefore, the machining tool 5 moves relative to the mounting member 4 in the X direction by moving the X-direction movable part 61 relative to the mounting member 4. Additionally, the machining tool 5 moves relative to the mounting member 4 in the Z direction by moving the Z-direction movable part 62 relative to the X-direction movable part 61. Thus, the machining tool 5 can move relative to the rope groove 108a in both the X and Z directions.

[0072] The power generation unit 63 generates a driving force that moves the X-direction movable part 61 relative to the mounting member 4 and a driving force that moves the Z-direction movable part 62 relative to the X-direction movable part 61. The power generation unit 63 includes an X-direction drive motor 64 and a Z-direction drive motor 65.

[0073] The X-direction drive motor 64 is mounted on the mounting component 4. The X-direction drive motor 64 is connected to the X-direction movable part 61. The X-direction drive motor 64 generates a driving force that moves the X-direction movable part 61 relative to the mounting component 4 by receiving a current supply. The X-direction drive motor 64 is a servo motor that can adjust the position of the X-direction movable part 61 relative to the mounting component 4.

[0074] The Z-direction drive motor 65 is mounted on the X-direction movable part 61. The Z-direction drive motor 65 is connected to the Z-direction movable part 62. The Z-direction drive motor 65 generates a driving force that moves the Z-direction movable part 62 relative to the X-direction movable part 62 by receiving a current supply. The Z-direction drive motor 65 is a servo motor capable of adjusting the position of the Z-direction movable part 62 relative to the X-direction movable part 61.

[0075] like Figure 3 As shown, the groove machining control unit 2 is connected to the X-direction drive motor 64 via connecting cable 66, and to the Z-direction drive motor 65 via connecting cable 67. The groove machining control unit 2 supplies current to the X-direction drive motor 64 via connecting cable 66, and to the Z-direction drive motor 65 via connecting cable 67. That is, the groove machining control unit 2 supplies current to the machining tool movable device 6 via each connecting cable 66 and 67. Figure 2 As shown, the groove processing control unit 2 is installed on the floor of the machine room 102.

[0076] The grooving control unit 2 controls the current supplied to the movable device 6 of the machining tool. Specifically, the grooving control unit 2 controls the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively. Thus, the movable device 6 of the machining tool is controlled by the grooving control unit 2. The grooving control unit 2 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the movable device 6 of the machining tool.

[0077] Furthermore, the groove machining control unit 2 is connected to the operation control device 106 via a connecting cable 68. Thus, the groove machining control unit 2 can communicate with the operation control device 106 via the connecting cable 68.

[0078] The trough processing control unit 2 can send control commands related to the rotational speed of the drive sheave 108 to the operation control device 106 via the connecting cable 68. The operation control device 106, upon receiving the control commands from the trough processing control unit 2, controls the motor of the traction machine body 107 in accordance with the control commands. This controls the rotational speed of the drive sheave 108. In other words, the trough processing control unit 2 sends control commands to the operation control device 106 to control the operation control device 106, thereby controlling the rotational speed of the drive sheave 108.

[0079] The current measuring device 3 is a measuring unit that measures the current value supplied to the movable device 6 of the machining tool. The current measuring device 3 generates a signal representing the measured current value as a measurement signal by measuring the current value supplied to the movable device 6 of the machining tool.

[0080] In this embodiment, the current measuring device 3 measures the current values ​​supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively. Additionally, in this embodiment, as... Figure 3 As shown, the current measuring device 3 measures the current values ​​supplied to the X-direction drive motor 64 and the Z-direction drive motor 65 in each of the connecting cables 66 and 67.

[0081] Here, when the machining tool 5 processes the rope groove 108a, the inner surface of the rope groove 108a is cut by the cutting tip 5a of the machining tool 5, thus causing the machining tool 5 to vibrate. When the machining tool 5 vibrates, the reaction force of the machining tool 5 on the inner surface of the rope groove 108a changes according to the vibration. The current value supplied to the movable device 6 of the machining tool changes according to the change in the reaction force of the machining tool 5 on the inner surface of the rope groove 108a. Therefore, the current value supplied to the movable device 6 of the machining tool changes according to the vibration generated by the machining tool 5 when processing the rope groove 108a. Therefore, the measurement signal generated by the current measuring device 3 becomes a signal corresponding to the vibration generated by the machining tool 5 when processing the rope groove 108a.

[0082] The measurement signal generated by the current measuring device 3 is sent to the groove machining control unit 2. Based on the measurement signal from the current measuring device 3, the groove machining control unit 2 controls the operation control device 106 and controls the current supplied to the movable device 6 of the machining tool.

[0083] Figure 4 It means Figure 3 A block diagram of the structure of the groove machining system. The groove machining control unit 2 includes a determination unit 21 and a control main unit 22.

[0084] The determination unit 21 stores the measurement signal from the current measuring device 3 as a database. Furthermore, based on the measurement signal stored in the database, the determination unit 21 generates current value data representing the time-varying changes in the current value. Since the measurement signal corresponds to the vibration generated by the machining tool 5, the current value data corresponds to waveform data representing the waveform of the vibration generated by the machining tool 5. Therefore, the determination unit 21 generates waveform data from the current value data based on the measurement signal stored in the database. In this embodiment, the determination unit 21 generates waveform data in the X direction based on the current value supplied to the X-direction drive motor 64 and waveform data in the Z direction based on the current value supplied to the Z-direction drive motor 65, respectively.

[0085] Here, when the machining tool 5 is machining the rope groove 108a, the vibration of the machining tool 5 is sometimes amplified due to resonance with the drive sheave 108, resulting in chatter. When the machining tool 5 generates chatter, the peak intensity of the chatter occurs periodically. Therefore, if the machining of the rope groove 108a continues while the machining tool 5 is generating chatter, the machining accuracy of the inner surface of the machined rope groove 108a will decrease.

[0086] The determination unit 21 determines whether the machining tool 5 has generated chatter based on the generated waveform data. Specifically, when the periodic peak value of the vibration in the generated waveform data exceeds a set threshold, the determination unit 21 determines that the machining tool 5 has generated chatter as a chatter generation determination. Conversely, when the periodic peak value of the vibration in the waveform data is below the set threshold, the determination unit 21 determines that chatter generation has been avoided as a chatter avoidance determination. In this embodiment, the determination unit 21 determines whether the machining tool 5 has generated chatter in both the X and Z directions based on the waveform data in each direction. Therefore, in this embodiment, there are cases where chatter generation determination is performed only in the X direction, only in the Z direction, and in both the X and Z directions. That is, the determination unit 21 performs a chatter generation determination when it determines that the machining tool 5 has generated chatter in at least one of the X and Z directions. Furthermore, the determination unit 21 performs a chatter avoidance determination when it determines that chatter generation has been avoided in both the X and Z directions.

[0087] While pressing the machining tool 5 against the inner surface of the rope groove 108a, the control unit 22 controls the current supplied to the movable device 6 of the machining tool, thereby adjusting the position of the machining tool 5 relative to the rope groove 108a to a preset feed position. The position of the machining tool 5 relative to the rope groove 108a is adjusted by adjusting the position of the X-direction movable part 61 relative to the mounting member 4 and the position of the Z-direction movable part 62 relative to the X-direction movable part 61. When the machining tool 5 reaches the preset target position relative to the rope groove 108a by cutting the inner surface of the rope groove 108a, the control unit 22 stops the adjustment of the position of the machining tool 5 relative to the rope groove 108a.

[0088] The control unit 22 controls the operation control device 106 based on the determination result of the determination unit 21. When the determination unit 21 determines flutter avoidance, the control unit 22 controls the operation control device 106 to set the rotational speed of the drive pulley 108 to a preset reference speed n0 [rpm]. Conversely, when the determination unit 21 determines flutter generation, the control unit 22 controls the operation control device 106 to reduce the rotational speed of the drive pulley 108 to a low speed n1 [rpm] lower than the reference speed n0 [rpm].

[0089] Furthermore, the control unit 22 controls the current supplied to the movable device 6 of the machining tool based on the determination result of the determination unit 21. When the determination unit 21 determines chatter avoidance, the control unit 22 controls the current supplied to the movable device 6 of the machining tool so that the position of the machining tool 5 relative to the rope groove 108a is a set feed position. Therefore, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a is constant. On the other hand, when the determination unit 21 determines chatter generation, the control unit 22 controls the current supplied to the movable device 6 of the machining tool so that the position of the machining tool 5 relative to the rope groove 108a changes from the set feed position in both the X and Z directions, thereby changing the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a. In this case, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a can change in either a decreasing or increasing direction.

[0090] Next, the chatter generated by the machining tool 5 when the rotational speed of the drive pulley 108 is the reference speed n0 [rpm] will be explained. Figure 5 It is a schematic representation in Figure 3 A side view of the state in which chatter occurs in the machining tool 5 when the speed of the drive pulley 108 is the reference speed n0 [rpm]. Figure 6 It is a schematic representation of passing through Figure 5The front view of the inner surface of the rope groove 108a after processing by machining tool 5. Figure 7 It means Figure 5 The acceleration a [m / s²] of machining tool 5 2 A graph showing the relationship between time t [s].

[0091] If resonance occurs in the machining tool 5 when the rotational speed of the drive pulley 108 is the reference rotational speed n0 [rpm], the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a increases, and the machining tool 5 generates chatter. When the machining tool 5 generates chatter, if... Figure 7 As shown, the acceleration a [m / s²] of the machining tool 5 is generated periodically. 2 The peak acceleration increases sharply. In the chatter caused by the resonance of the machining tool 5 when the rotational speed of the drive sheave 108 is the reference speed n0 [rpm], the period T of the peak acceleration of the machining tool 5 is T0 [s].

[0092] As a result, on the inner surface of the rope groove 108a after being machined by the machining tool 5, such as Figure 6 As shown, the stripe pattern creates unevenness 108b that is evenly spaced in the circumferential direction of the drive pulley 108. As a result, when the machining tool 5 vibrates due to resonance, the condition of the inner surface of the rope groove 108a processed by the machining tool 5 deteriorates. The spacing p of the unevenness 108b generated when the rotational speed of the drive pulley 108 is the reference rotational speed n0 [rpm] is p0 [m].

[0093] The acceleration a of machining tool 5 [m / s] 2 The change in the current is reflected in the change in the current value measured by the current measuring device 3. Therefore, when the machining tool 5 experiences chattering at the reference speed n0 [rpm] of the drive pulley 108, the determination unit 21 determines whether chattering has occurred. When the determination unit 21 determines whether chattering has occurred, the speed of the drive pulley 108 is reduced from the reference speed n0 [rpm] to a low speed n1 [rpm] by controlling the operation control device 106 through the control unit 22. Furthermore, when the determination unit 21 determines whether chattering has occurred, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a changes by controlling the machining tool movable device 6 through the control unit 22.

[0094] Next, the vibration generated by the machining tool 5 when the rotational speed of the drive pulley 108 is a low speed n1 [rpm] will be explained. Figure 8 It is a schematic representation Figure 5 A side view of the state of the machining tool 5 when the speed of the drive pulley 108 is a low speed n1 [rpm]. Figure 9 It is a schematic representation of passing through Figure 8The front view of the inner surface of the rope groove 108a after processing by machining tool 5. Figure 10 It means Figure 8 The acceleration a [m / s²] of machining tool 5 2 A graph showing the relationship between time t [s].

[0095] When the speed of the drive pulley 108 becomes a low speed n1 [rpm], such as Figure 10 As shown, the period T of the peak acceleration of the machining tool 5 is T1 [s], which is longer than T0 [s]. Furthermore, the peak acceleration of the machining tool 5 when the rotational speed of the drive sheave 108 is a low speed n1 [rpm] is smaller than the peak acceleration of the machining tool 5 when the rotational speed of the drive sheave 108 is a reference speed n0 [rpm].

[0096] As a result, because the rotational speed of the drive pulley 108 changes from the reference speed n0 [rpm] to the low speed n1 [rpm], therefore... Figure 9 As shown, the spacing p of the irregularities 108b generated on the inner surface of the rope groove 108a becomes p1 [m], which is longer than p0 [m]. In addition, since the rotational speed of the drive pulley 108 changes from the reference speed n0 [rpm] to the low speed n1 [rpm], the size of the irregularities 108b generated on the inner surface of the rope groove 108a becomes smaller.

[0097] Therefore, when the machining tool 5 vibrates due to its resonance, the rotational speed of the drive pulley 108 is reduced, thereby suppressing the vibration generated by the machining tool 5. This allows the machining tool 5 to continue machining the rope groove 108a. Furthermore, when the machining tool 5 vibrates due to its resonance, the rotational speed of the drive pulley 108 is reduced, resulting in a longer period T of the peak acceleration of the machining tool 5 compared to when the vibration occurs. Therefore, as the machining tool 5 continues machining the rope groove 108a, the unevenness 108b caused by the vibration on the inner surface of the rope groove 108a can be repaired by the machining tool 5 through cutting.

[0098] Furthermore, when the machining tool 5 vibrates due to its resonance, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a changes by controlling the movable device 6 of the machining tool via the control body 22. This further suppresses the vibration generated by the machining tool 5.

[0099] Next, the control of the current supplied to the movable device 6 of the machining tool, implemented by the groove machining control unit 2, will be explained. When the determination unit 21 determines chatter generation, the control main unit 22 of the groove machining control unit 2 performs frequency analysis of the waveform data generated by the determination unit 21. As a result, the control main unit 22 calculates the relationship between the current value I[A] measured by the current measuring device 3 and the frequency f[Hz] of the current I[A].

[0100] The current value I[A] measured by the current measuring device 3 varies according to the chatter generated by the machining tool 5. Therefore, the distribution of the frequency components of the chatter generated by the machining tool 5 is reflected in the relationship between the current value I[A] measured by the current measuring device 3 and the frequency f[Hz] of the current I[A]. Therefore, the control unit 22 calculates the relationship between the current value I[A] measured by the current measuring device 3 and the frequency f[Hz] of the current I[A] based on the waveform data generated by the determination unit 21, and uses this relationship as the frequency component of the chatter generated by the machining tool 5.

[0101] Figure 11 It means by Figure 4 A graph showing the relationship between the current value I[A] measured by the current meter 3 and the frequency f[Hz] of the current I[A]. Furthermore, in Figure 11 The diagram shows the relationship between the current value supplied to the Z-direction drive motor 65 and time. The relationship between the current value supplied to the X-direction drive motor 64 and the frequency of the current is also shown. Figure 11 The same applies. For the current I[A] measured by the current measuring device 3, peak values ​​of the current value are generated in multiple frequency bands of the current I[A]. The control unit 22 controls the current supplied to the movable device 6 of the machining tool to suppress the peak values ​​of the current I[A].

[0102] The control unit 22 generates a bandpass filter based on the relationship between the current value I[A] calculated from waveform data and the frequency f[Hz] of the current I[A]. The bandpass filter generated by the control unit 22 is a filter that can suppress the current in the frequency band where the peak value of the current I[A] is generated, and allow the current to pass through in frequency bands other than the frequency band where the peak value is generated. Thus, the control unit 22 generates a bandpass filter that suppresses the peak component of the frequency components that cause flutter.

[0103] The control unit 22 supplies current to the movable device 6 of the machining tool, whose current value has been corrected by a bandpass filter generated based on waveform data. Specifically, the control unit 22 corrects the current values ​​supplied to the X-direction drive motor 64 and the Z-direction drive motor 65 by passing them through bandpass filters.

[0104] The control unit 22 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively, by controlling the current value corrected by the bandpass filter. This allows the tool to reach a preset target position.

[0105] Figure 12 This indicates that it will be by Figure 11 The control unit 22 generates a graph showing the relationship between the current value I[A] measured by the current measuring device 3 and the frequency f[Hz] of the current I[A] when the current value is corrected by a bandpass filter and supplied to the movable device 6 of the machining tool. Furthermore, in Figure 12 The diagram shows the relationship between the current value measured by the current meter 3 and the current frequency when a current value corrected by a bandpass filter is supplied to the Z-direction drive motor 65. The relationship between the current value measured by the current meter 3 and the current frequency when a current value corrected by a bandpass filter is supplied to the X-direction drive motor 64 is also shown. Figure 12 Similarly, when a current whose value has been corrected by a bandpass filter is supplied to the movable device 6 of the machining tool, the peak value of the frequency component of the current I[A] measured by the current measuring device 3 is suppressed. As a result, the chatter generated by the machining tool 5 when machining the rope groove 108a is suppressed, and the machining tool 5 can stably machine the rope groove 108a.

[0106] Figure 13 It means by Figure 11 A graph illustrating the characteristics of a bandpass filter generated by the control unit 22. Figure 13 The diagram illustrates the relationship between the filter amplitude B of the bandpass filter and the frequency f [Hz] of the current I [A]. As a characteristic of the bandpass filter generated by the control unit 22, an example is a filter whose current amplitude B is attenuated at a specific center frequency band and maintained in frequency bands outside the center frequency band. Therefore, in the control unit 22, by using a bandpass filter whose center frequency band is the frequency band of the frequency component that generates flutter, the frequency components of flutter can be suppressed.

[0107] Furthermore, when the determination unit 21 determines chatter generation, the control unit 22 calculates the frequency and phase of the current I[A] based on the waveform data, and supplies the movable tool 6 with a current whose frequency is the same as the frequency of the current I[A] but whose phase is opposite to that of the current I[A]. Therefore, when the determination unit 21 determines chatter generation, the control unit 22 calculates the frequency and phase of the chatter based on the waveform data, and supplies the movable tool 6 with a current whose frequency is the same as the frequency of the chatter but whose phase is opposite to that of the chatter. That is, when the determination unit 21 determines chatter generation, the control unit 22 supplies the movable tool 6 with a current whose phase is offset by 180° relative to the chatter generated by the machining tool 5.

[0108] Specifically, the control unit 22 makes the frequency of the current supplied to the X-direction drive motor 64 the same as the frequency of the chattering, and makes the phase of the current supplied to the X-direction drive motor 64 opposite to the phase of the chattering. Additionally, the control unit 22 makes the frequency of the current supplied to the Z-direction drive motor 65 the same as the frequency of the chattering, and makes the phase of the current supplied to the Z-direction drive motor 65 opposite to the phase of the chattering.

[0109] The control unit 22 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively, which has a phase opposite to that of the chatter, so as to reach the preset target position.

[0110] Figure 14 It means by Figure 4 A graph showing the relationship between the current I [A] measured by the current meter 3 and time t [s]. Furthermore, in... Figure 14 The diagram shows the relationship between the current value supplied to the Z-direction drive motor 65, as measured by the current meter 3, and time. The relationship between the current value supplied to the X-direction drive motor 64, as measured by the current meter 3, and time is also shown. Figure 14 same. Figure 15 It means Figure 4 A graph showing the relationship between the current I[A] supplied by the control unit 22 to the movable device 6 of the machining tool and time t[s]. Figure 15 The relationship between the current I[A] supplied by the control unit 22 to drive the motor 65 in the Z direction and time t[s] is shown. The relationship between the current I[A] supplied by the control unit 22 to drive the motor 64 in the X direction and time t[s] is also shown. Figure 15 same.

[0111] When the machining tool 5 vibrates during the machining of the rope groove 108a, such as Figure 14As shown, the peak value of the current I[A] measured by the current meter 3 is generated with a certain period. Therefore, as Figure 15 As shown, the control unit 22 supplies a current containing a peak value that is in the opposite phase to the peak value of the current I[A] measured by the current measuring device 3 to the movable device 6 of the machining tool. Therefore, the currents supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 are both currents containing a peak value that is in the opposite phase to the peak value of the current I[A] measured by the current measuring device 3.

[0112] Figure 16 This means that by controlling the main body 22, Figure 15 A graph showing the relationship between the current I[A] measured by the current measuring device 3 and time t[s] when the current I[A] is supplied to the movable device 6 of the machining tool. Furthermore, in Figure 16 The diagram shows the control unit 22 controlling the... Figure 15 The relationship between the current value measured by the current measuring device 3 and time when current is supplied to the Z-direction drive motor 65. The relationship between the current value measured by the current measuring device 3 and time when current is supplied to the X-direction drive motor 64 via the control unit 22 is also... Figure 16 Same. For example... Figure 15 As shown, the phase of the current I[A] supplied to the movable device 6 of the machining tool by the control body 22 is opposite to the phase of the chatter generated by the machining tool 5. Therefore, the movable device 6 of the machining tool is controlled by the control body 22 to eliminate the chatter generated by the machining tool 5. Thus, as Figure 16 As shown, the current value I[A] measured by the current measuring device 3 is constant. Therefore, the chatter generated by the machining tool 5 when machining the rope groove 108a is suppressed, and the machining tool 5 can stably machine the rope groove 108a.

[0113] Next, the groove machining method for machining the rope groove 108a using the groove machining system will be explained. Figure 17 It means through Figure 3 A flowchart illustrating the groove machining method for machining the rope groove 108a using the groove machining system. When machining the rope groove 108a using the groove machining system, the groove machining control unit 2 controls the operation control device 106 to rotate the drive pulley 108 at a reference speed n0 [rpm]. Furthermore, the groove machining control unit 2 controls the current supplied to the machining tool movable device 6 to adjust the position of the machining tool 5 relative to the rope groove 108a to a set feed position, thereby pressing the cutting tip 5a of the machining tool 5 against the rope groove 108a. As a result, the inner surface of the rope groove 108a is cut by the cutting tip 5a of the machining tool 5, and the rope groove 108a is machined.

[0114] When the machining tool 5 cuts the inner surface of the rope groove 108a, in step S1, the current measuring device 3 measures the current value I[A] supplied to the movable device 6 of the machining tool. Therefore, in step S1, the current measuring device 3 measures the current values ​​supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively. In addition, in step S1, a signal representing the current value I[A] measured by the current measuring device 3 is sent from the current measuring device 3 to the groove machining control unit 2 as a measurement signal. In the groove machining method, the processing in step S1 is called the measurement step.

[0115] Then, in step S2, the groove machining control unit 2 determines whether the machining tool 5 has generated chatter based on the measurement signal received from the current measuring device 3, using its determination unit 21. In step S2, the measurement signal from the current measuring device 3 is continuously stored as a database in the determination unit 21. In step S2, the determination unit 21 generates current value data representing the time change of the current value measured by the current measuring device 3, based on the measurement signal stored in the database, as waveform data representing the waveform of the vibration generated by the machining tool 5. Furthermore, in step S2, the determination unit 21 determines whether the machining tool 5 has generated chatter based on the generated waveform data. In the groove machining method, step S2 is the determination step.

[0116] In step S2, after the chatter avoidance determination is performed by the determination unit 21, the processing of the groove machining control unit 2 proceeds to step S3. In step S3, the groove machining control unit 2 maintains the rotational speed of the drive pulley 108 at a reference speed n0 [rpm] by controlling the operation control device 106. At this time, the groove machining control unit 2 adjusts the position of the machining tool 5 relative to the rope groove 108a to the set feed position by controlling the machining tool movable device 6. As a result, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a is constant.

[0117] In step S2, after the determination unit 21 determines that the machining tool 5 is generating chatter, the processing of the groove machining control unit 2 proceeds to step S4. In step S4, the groove machining control unit 2 controls the operation control device 106 to reduce the rotational speed of the drive pulley 108 from the reference speed n0 [rpm] to the low speed n1 [rpm]. Furthermore, in step S3, the groove machining control unit 2 controls the machining tool movable device 6 to change the position of the machining tool 5 relative to the rope groove 108a from the set feed position, thereby changing the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a.

[0118] That is, based on the determination result in step S2, in either step S3 or S4, the groove processing control unit 2 controls the operation control device 106, thereby controlling the rotational speed of the drive sheave 108. Additionally, based on the determination result in step S2, in either step S3 or S4, the groove processing control unit 2 controls the current supplied to the machining tool movable device 6, thereby controlling the position of the machining tool 5 relative to the rope groove 108a. In the groove processing method, the processing in steps S3 and S4 constitutes the sheave rotation control steps.

[0119] Furthermore, in step S4, the control unit 22 of the slot machining control unit 2 generates a bandpass filter, and the control unit 22 supplies a current whose current value has been corrected by the bandpass filter to the machining tool movable device 6. As a result, the current values ​​supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 are both corrected by the bandpass filter.

[0120] Furthermore, in step S4, the control unit 22 of the groove machining control unit 2 calculates the frequency and phase of the current I[A] measured by the current measuring device 3, and supplies a current with the same frequency as the current I[A] and opposite phase to the current I[A] to the machining tool movable device 6. As a result, the phases of the currents supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 respectively become currents with phases opposite to the current measured by the current measuring device 3. Thus, the machining of the rope groove 108a is performed.

[0121] In this groove machining system, by supplying current to the movable device 6 of the machining tool, the movable device 6 moves the machining tool 5 relative to the rope groove 108a. The current measuring device 3 measures the current value supplied to the movable device 6 and generates a signal representing the current value corresponding to the vibration generated by the machining tool 5 during the machining of the rope groove 108a, as a measurement signal. The groove machining control unit 2 generates waveform data representing the waveform of the vibration generated by the machining tool 5 based on the measurement signal, and determines whether the machining tool 5 is experiencing chatter based on the waveform data. Furthermore, if chatter is determined to have occurred, the groove machining control unit 2 controls the operation control device 106 to reduce the rotational speed of the drive pulley 108.

[0122] Therefore, even if the machining tool 5 experiences chatter, reducing the rotational speed of the drive pulley 108 can suppress the vibration generated by the machining tool 5. This allows the machining tool 5 to continue machining the rope groove 108a. Furthermore, by suppressing the vibration generated by the machining tool 5 and continuing machining the rope groove 108a, the machining tool 5 can repair the unevenness 108b caused by chatter on the inner surface of the rope groove 108a. Therefore, the work efficiency of the operator machining the rope groove 108a can be improved, and the workload of the operator machining the rope groove 108a can be reduced.

[0123] Furthermore, when the groove machining control unit 2 determines that chatter has occurred, it changes the rotational speed of the drive pulley 108 and controls the current supplied to the machining tool movable device 6, thereby changing the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a. Therefore, when chatter occurs in the machining tool 5, the vibration generated by the machining tool 5 can be further suppressed. As a result, it is easier to continue machining the rope groove 108a with the machining tool 5.

[0124] In addition, the current measuring device 3 measures the current value supplied to the movable device 6 of the machining tool. Therefore, the current measuring device 3 can easily generate a signal corresponding to the vibration generated by the machining tool 5 when machining the rope groove 108a.

[0125] Furthermore, the control unit 22 of the groove machining control unit 2 calculates the frequency components of the chatter of the machining tool 5 based on waveform data after determining chatter generation. The control unit 22 supplies current through a bandpass filter to the movable device 6 of the machining tool, which suppresses the peak components of the calculated chatter frequency components. Therefore, the frequency components of chatter can be suppressed, and the machining tool 5 can stably machine the rope groove 108a.

[0126] Furthermore, the control unit 22 of the groove machining control unit 2 calculates the frequency and phase of the chatter of the machining tool 5 based on waveform data after determining chatter generation. The control unit 22 supplies a current to the movable device 6 of the machining tool with the same frequency as the chatter and the opposite phase to the chatter. Therefore, the control unit 22 can control the elimination of chatter generated by the machining tool 5. As a result, the chatter generated by the machining tool 5 when machining the rope groove 108a can be suppressed, and the machining of the rope groove 108a by the machining tool 5 can be performed stably.

[0127] Implementation method 2.

[0128] Figure 18 This is a structural diagram showing the state of the groove processing system of Embodiment 2. Figure 19It means Figure 18 The diagram illustrates the structure of the groove machining system. In this embodiment, the rope groove 105a of the deflector wheel 105 is machined using the groove machining system. That is, in this embodiment, the rope wheel that is machined by the groove machining system, i.e., the machined rope wheel, is designated as the deflector wheel 105.

[0129] When machining the rope groove 105a of the guide wheel 105 using the groove machining system, a portion of the multiple ropes 109 are unloaded from the guide wheel 105, leaving the remaining ropes 109 wound around the guide wheel 105. Therefore, when machining the rope groove 105a of the guide wheel 105 using the groove machining system, only the remaining ropes 109 are continuously wound around the drive pulley 108 and the guide wheel 105. The guide wheel 105 rotates in conjunction with the rotation of the drive pulley 108 via the remaining ropes 109. In this embodiment, the groove machining system is installed in the machine room 102 with a portion of the multiple ropes 109 unloaded from the guide wheel 105.

[0130] The structure of the groove processing system in this embodiment is the same as that in Embodiment 1. In this embodiment, the groove processing unit 1 is mounted on the floor of the machine room 102 via the mounting component 4. Thus, the groove processing unit 1 can be loaded and unloaded relative to the floor of the machine room 102.

[0131] The groove machining unit 1 is positioned radially outward from the guide wheel 105. Additionally, as... Figure 19 As shown, the groove processing unit 1 and the portion of the outer periphery of the deflector wheel 105 where the rope 109 has been removed are arranged opposite each other.

[0132] The machining tool 5 of the groove machining unit 1 is configured such that the tip 5a is opposite to the rope groove 105a of the guide wheel 105. In this embodiment, as... Figure 19 As shown, the tip 5a is an arc shape with an outer diameter that is the same as the machined inner diameter of the rope groove 105a.

[0133] The machining tool 5 contacts the inner surface of the rope groove 105a of the deflector wheel 105 while the deflector wheel 105 and the drive rope wheel 108 are rotating in conjunction, thereby machining the rope groove 105a. The machining tool 5 performs machining on the rope groove 105a into which the rope 109 is inserted by changing the position of the rope 109 to other rope grooves 105a.

[0134] When the deflector pulley 105 rotates in conjunction with the drive pulley 108, the rotational speed of the deflector pulley 105 corresponds to the rotational speed of the drive pulley 108. Therefore, when machining the rope groove 105a using the machining tool 5, the rotation of the drive pulley 108 and the deflector pulley 105 is controlled by the operation control device 106. The groove machining control unit 2 sends control commands to the operation control device 106 to control the operation control device 106, thereby controlling the rotational speed of the drive pulley 108 and the deflector pulley 105. Other structures and groove machining methods are the same as in Embodiment 1.

[0135] In this groove machining system, the machining target pulley is designated as a deflector pulley 105. The deflector pulley 105 rotates in conjunction with the rotation of the drive pulley 108 via a rope 109 wound around it. Therefore, the machining tool 5 can machine the rope groove 105a of the deflector pulley 105. Furthermore, even if the machining tool 5 vibrates during machining the rope groove 105a of the deflector pulley 105, the vibration generated by the machining tool 5 can be suppressed by reducing the rotational speed of the deflector pulley 105 in conjunction with the drive pulley 108. Thus, machining of the rope groove 105a by the machining tool 5 can continue, and unevenness caused by vibration on the inner surface of the rope groove 105a can be repaired by the machining tool 5. Therefore, the work efficiency of the operator machining the rope groove 105a of the deflector pulley 105 can be improved, and the workload of the operator machining the rope groove 105a of the deflector pulley 105 can be reduced.

[0136] Furthermore, the control unit 22 of the groove machining control unit 2 can control the current supplied to the movable device 6 of the machining tool when a chatter generation determination is made, just as in Embodiment 1. This further suppresses chatter generated by the machining tool 5 when machining the rope groove 105a, enabling stable machining of the rope groove 108a by the machining tool 5.

[0137] Implementation method 3.

[0138] Figure 20 This is an explanatory diagram showing the structure of the groove processing system in Embodiment 3. Figure 21 It means Figure 20 A block diagram of the structure of the groove machining system. The groove machining system includes a groove machining unit 1, a groove machining control unit 2, and an acceleration sensor 7. The structure of the groove machining unit 1 is the same as that in Embodiment 1.

[0139] Accelerometer 7 is mounted on machining tool 5 via Z-direction movable part 62 of machining tool movable device 6. Accelerometer 7 measures the acceleration a [m / s²] of machining tool 5. 2 The measuring unit of the machining tool 5. Accelerometer 7 measures the acceleration a [m / s²] of the machining tool 5.2 The system generates a signal representing the measured acceleration as a measurement signal. In this embodiment, a two-axis sensor in the X and Z directions is used as the acceleration sensor 7. Therefore, in this embodiment, the acceleration of the machining tool 5 in the X and Z directions is measured by the acceleration sensor 7.

[0140] Here, the acceleration a [m / s²] of machining tool 5 2 The vibration generated by the machining tool 5 during the machining of the rope groove 108a varies. Therefore, the measurement signal generated by the acceleration sensor 7 becomes a signal corresponding to the vibration generated by the machining tool 5 during the machining of the rope groove 108a.

[0141] The measurement signal generated by the acceleration sensor 7 is sent to the groove machining control unit 2. The groove machining control unit 2 controls the operation control device 106 based on the measurement signal from the acceleration sensor 7.

[0142] The determination unit 21 of the groove machining control unit 2 stores the measurement signal from the acceleration sensor 7 as a database. In addition, the determination unit 21 generates acceleration data representing the time change of the acceleration of the machining tool 5, and waveform data representing the waveform of the vibration generated by the machining tool 5, based on the measurement signal stored in the database.

[0143] The determination unit 21 determines, in the same manner as in Embodiment 1, whether the machining tool 5 has generated chatter based on the generated waveform data.

[0144] While pressing the machining tool 5 against the inner surface of the rope groove 108a, the control unit 22 controls the current supplied to the movable device 6 of the machining tool, thereby adjusting the position of the machining tool 5 relative to the rope groove 108a to the set feed position. Therefore, the control unit 22 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65 respectively. The control of the movable device 6 of the machining tool by the control unit 22 is the same as in Embodiment 1.

[0145] The control unit 22 controls the operation control device 106 and the machining tool movable device 6 based on the determination result of the determination unit 21. The control unit 22 controls the operation control device 106 and the machining tool movable device 6 in the same way as in Embodiment 1. That is, when the determination unit 21 determines that flutter avoidance is achieved, the control unit 22 controls the operation control device 106 to set the rotational speed of the drive pulley 108 to a preset reference speed n0 [rpm]. On the other hand, when the determination unit 21 determines that flutter is generated, the control unit 22 controls the operation control device 106 to reduce the rotational speed of the drive pulley 108 to a low speed n1 [rpm] that is lower than the reference speed n0 [rpm].

[0146] Furthermore, when the determination unit 21 determines chatter avoidance, the control unit 22 controls the current supplied to the movable tool 6 so that the position of the tool 5 relative to the rope groove 108a becomes the set feed position. On the other hand, when the determination unit 21 determines chatter generation, the control unit 22 controls the current supplied to the movable tool 6 to change the position of the tool 5 relative to the rope groove 108a from the set feed position in both the X and Z directions, thereby changing the cutting depth of the tool 5 relative to the inner surface of the rope groove 108a.

[0147] When the determination unit 21 determines that flutter has occurred, the control unit 22 performs frequency analysis on the waveform data generated by the determination unit 21. Based on this, the control unit 22 calculates the acceleration a [m / s²] measured by the acceleration sensor 7. 2 The value of ] and acceleration a [m / s 2 The relationship between the frequency f[Hz].

[0148] The frequency distribution of the chatter generated by machining tool 5 is reflected in the acceleration a [m / s²] measured by accelerometer 7. 2 The value of ] and acceleration a [m / s 2 The relationship between the frequency f [Hz] and the acceleration a [m / s²] measured by the acceleration sensor 7 is determined based on the waveform data generated by the determination unit 21. 2 The value of ] and acceleration a [m / s 2 The relationship between the frequencies f[Hz] is used as the frequency components of the chatter generated by the machining tool 5.

[0149] Figure 22 It means by Figure 21 The acceleration a [m / s] measured by the accelerometer 7 2 The value of ] and acceleration a [m / s 2 A graph showing the relationship between the frequency f [Hz] and the frequency f. Furthermore, in Figure 22 The diagram shows the relationship between the acceleration value of the machining tool 5 in the Z direction and the frequency of acceleration. The relationship between the acceleration value of the machining tool 5 in the X direction and the frequency of acceleration is also shown. Figure 22 The same. For the acceleration a [m / s²] measured by acceleration sensor 7... 2 ], at acceleration a [m / s 2 The peak value of acceleration was generated in multiple frequency bands. The control main unit 22 controls the current supplied to the movable device 6 of the machining tool to suppress the acceleration a [m / s²]. 2 The peak value of ].

[0150] The control unit 22 calculates the acceleration a [m / s²] based on the waveform data. 2 The value of ] and acceleration a [m / s 2 The relationship between the frequencies of [ ] is used to generate a bandpass filter. The characteristics of the bandpass filter generated by the control unit 22 are as follows: Figure 13 The bandpass filter in Embodiment 1 shown has the same characteristics.

[0151] The control unit 22 supplies current to the movable device 6 of the machining tool, whose current value has been corrected by a bandpass filter generated based on waveform data. Specifically, the control unit 22 corrects the current values ​​supplied to the X-direction drive motor 64 and the Z-direction drive motor 65 by passing them through bandpass filters.

[0152] The control unit 22 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively, by controlling the current value corrected by the bandpass filter. This allows the tool to reach a preset target position.

[0153] Figure 23 This indicates that it will be passed by... Figure 21 The bandpass filter generated by the control unit 22 corrects the current value. When the current is supplied to the movable device 6 of the machining tool, the acceleration a [m / s] measured by the acceleration sensor 7 is [m / s]. 2 The value of ] and acceleration a [m / s 2 A graph showing the relationship between the frequency f [Hz] and the frequency f. Furthermore, in Figure 23 The diagram illustrates the relationship between the acceleration value of the machining tool 5 in the Z direction and the frequency of acceleration when a current value corrected by a bandpass filter is supplied to the Z-direction drive motor 65. Similarly, the diagram shows the relationship between the acceleration value of the machining tool 5 in the X direction and the frequency of acceleration when a current value corrected by a bandpass filter is supplied to the X-direction drive motor 64. Figure 23 The same. It can be seen that when a current, whose value has been corrected by a bandpass filter, is supplied to the movable device 6 of the machining tool, the acceleration a [m / s²] measured by the acceleration sensor 7 is the same. 2 The frequency component of [] is called acceleration a [m / s]. 2 The magnitude of the peak component of the value is suppressed. As a result, the chatter generated by the machining tool 5 when machining the rope groove 108a is suppressed, and the machining tool 5 can stably machine the rope groove 108a.

[0154] Furthermore, when the determination unit 21 determines the occurrence of flutter, the control unit 22 calculates the acceleration a [m / s²] based on the waveform data. 2The frequency and phase of the [ ] are supplied to the movable device 6 of the machining tool with frequency and acceleration a [m / s ] 2 The frequency of the acceleration a is the same as that of the acceleration a[m / s²] and the phase is the same as that of the acceleration a[m / s²]. 2 The current has the opposite phase to the current generated by the machining tool 5. Therefore, when the determination unit 21 determines that chatter has occurred, the control unit 22 calculates the frequency and phase of the chatter based on the waveform data, and supplies the machining tool movable device 6 with a current whose frequency is the same as the frequency of the chatter but whose phase is opposite to the phase of the chatter. That is, when the determination unit 21 determines that chatter has occurred, the control unit 22 supplies the machining tool movable device 6 with a current whose phase is 180° different from the phase of the chatter generated by the machining tool 5.

[0155] Specifically, the control unit 22 makes the frequency of the current supplied to the X-direction drive motor 64 the same as the frequency of the chattering, and makes the phase of the current supplied to the X-direction drive motor 64 opposite to the phase of the chattering. Additionally, the control unit 22 makes the frequency of the current supplied to the Z-direction drive motor 65 the same as the frequency of the chattering, and makes the phase of the current supplied to the Z-direction drive motor 65 opposite to the phase of the chattering.

[0156] The control unit 22 adjusts the position of the machining tool 5 relative to the rope groove 108a by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65, respectively, which has a phase opposite to that of the chatter, so as to reach the preset target position.

[0157] Figure 24 It means by Figure 21 The acceleration a [m / s] measured by the accelerometer 7 2 A graph showing the relationship between the value of ] and time t [s]. Furthermore, in Figure 24 The figure shows the relationship between the acceleration value of the machining tool 5 in the Z direction and time. The relationship between the acceleration value of the machining tool 5 in the X direction and time is also shown. Figure 24 same. Figure 25 This indicates that the acceleration sensor 7 measured... Figure 24 acceleration a [m / s 2 A graph showing the relationship between the current I[A] supplied by the main control unit 22 to the movable device 6 of the machining tool and time t[s]. Figure 25 The relationship between the current I[A] supplied by the control unit 22 to drive the motor 65 in the Z direction and time t[s] is shown. The relationship between the current I[A] supplied by the control unit 22 to drive the motor 64 in the X direction and time t[s] is also shown. Figure 25 same.

[0158] When the machining tool 5 vibrates during the machining of the rope groove 108a, such as Figure 24As shown, the acceleration a [m / s²] measured by acceleration sensor 7 2 The peak value of ] is generated at a certain period. Therefore, as Figure 25 As shown, the control unit 22 will include the acceleration a [m / s²] measured by the acceleration sensor 7. 2 The peak value of the current value that is opposite to the peak value of the current I[A] measured by the current measuring device 3 is supplied to the movable device 6 of the machining tool. As a result, the current supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 respectively becomes a current containing the peak value of the current value that is opposite to the peak value of the current I[A] measured by the current measuring device 3.

[0159] like Figure 25 As shown, the phase of the current I[A] supplied to the movable device 6 of the machining tool by the control body 22 is opposite to the phase of the chatter generated by the machining tool 5. Therefore, the movable device 6 of the machining tool is controlled by the control body 22 to eliminate the chatter generated by the machining tool 5. As a result, the acceleration a[m / s] measured by the acceleration sensor 7 is... 2 The value of ] is constant. Therefore, the chatter generated by the machining tool 5 when machining the rope groove 108a is suppressed, and the machining tool 5 can stably machine the rope groove 108a. Other structures are the same as in Embodiment 1.

[0160] Next, the groove machining method for machining the rope groove 108a using the groove machining system will be explained. Figure 26 It means through Figure 20 A flowchart of the groove machining method when machining the rope groove 108a using the groove machining system. When machining the rope groove 108a using the groove machining system, similar to Embodiment 1, the inner surface of the rope groove 108a is cut by the cutting tip 5a of the machining tool 5, and the rope groove 108a is machined.

[0161] When the machining tool 5 is cutting the inner surface of the rope groove 108a, in step S11, the acceleration sensor 7 measures the acceleration a [m / s] of the machining tool 5 in the X and Z directions, respectively. 2 The value of ] is given. In step S11, the acceleration a [m / s] measured by the acceleration sensor 7 is expressed as... 2 The signal of the value of ] is sent from the acceleration sensor 7 to the groove machining control unit 2 as a measurement signal. In the groove machining method, the processing of step S11 becomes the measurement step.

[0162] Then, in step S2, the groove machining control unit 2 determines whether the machining tool 5 has generated chatter based on the measurement signal received from the acceleration sensor 7 by its determination unit 21. In step S2, the measurement signal from the acceleration sensor 7 is continuously stored as a database in the determination unit 21. In step S2, the determination unit 21 generates a value representing the acceleration a [m / s²] measured by the acceleration sensor 7 based on the measurement signal stored in the database. 2 The acceleration data representing the time change of the value of ] is used as waveform data to represent the vibration generated by the machining tool 5. In addition, in step S2, the determination unit 21 determines whether the machining tool 5 has generated chatter based on the generated waveform data.

[0163] In step S2, after the chatter avoidance determination is performed by the determination unit 21, the processing of the groove machining control unit 2 proceeds to step S3. In step S3, the groove machining control unit 2 maintains the rotational speed of the drive pulley 108 at a reference speed n0 [rpm] by controlling the operation control device 106. At this time, the groove machining control unit 2 adjusts the position of the machining tool 5 relative to the rope groove 108a to the set feed position by controlling the machining tool movable device 6. As a result, the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a is constant.

[0164] In step S2, after the determination unit 21 determines that the machining tool 5 is generating chatter, the processing of the groove machining control unit 2 proceeds to step S4. In step S4, the groove machining control unit 2 controls the operation control device 106 to reduce the rotational speed of the drive pulley 108 from the reference speed n0 [rpm] to the low speed n1 [rpm]. Furthermore, in step S3, the groove machining control unit 2 controls the machining tool movable device 6 to change the position of the machining tool 5 relative to the rope groove 108a from the set feed position, thereby changing the cutting depth of the machining tool 5 relative to the inner surface of the rope groove 108a.

[0165] That is, based on the determination result in step S2, in either step S3 or S4, the groove processing control unit 2 controls the operation control device 106, thereby controlling the rotational speed of the drive sheave 108. Additionally, based on the determination result in step S2, in either step S3 or S4, the groove processing control unit 2 controls the current supplied to the machining tool movable device 6, thereby controlling the position of the machining tool 5 relative to the rope groove 108a.

[0166] Furthermore, in step S4, the control unit 22 of the slot machining control unit 2 generates a bandpass filter, and the control unit 22 supplies a current whose current value has been corrected by the bandpass filter to the machining tool movable device 6. As a result, the current values ​​supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 are both corrected by the bandpass filter.

[0167] Furthermore, in step S4, the control main unit 22 of the groove machining control unit 2 calculates the acceleration a [m / s] measured by the acceleration sensor 7. 2 The frequency and phase of the [ ] are supplied to the movable device 6 of the machining tool with frequency and acceleration a [m / s ] 2 The frequency of the acceleration a is the same as that of the acceleration a[m / s²] and the phase is the same as that of the acceleration a[m / s²]. 2 The phase of the current supplied by the control unit 22 to the X-direction drive motor 64 and the Z-direction drive motor 65 is opposite to the phase of the current measured by the current measuring device 3. This allows for the machining of the rope groove 108a.

[0168] In such a grooving system, the acceleration sensor 7 measures the acceleration a [m / s²] of the machining tool 5. 2 The value of ] is used to generate a signal representing the acceleration corresponding to the vibration generated by the machining tool 5 when machining the rope groove 108a, which is then used as a measurement signal. The groove machining control unit 2 generates waveform data representing the waveform of the vibration generated by the machining tool 5 based on the measurement signal from the acceleration sensor 7, and determines whether the machining tool 5 is experiencing chatter based on the waveform data. In addition, if chatter is determined to have occurred, the groove machining control unit 2 reduces the rotational speed of the drive rope pulley 108 by controlling the operation control device 106.

[0169] Therefore, the acceleration a [m / s²] of the machining tool 5 is measured by the acceleration sensor 7. 2 The value of [value] can also determine whether the machining tool 5 is experiencing chatter. Therefore, if the machining tool 5 is experiencing chatter, the rotational speed of the drive pulley 108 can be reduced to suppress the vibration of the machining tool 5, and the machining tool 5 can repair any unevenness on the inner surface of the rope groove 108a. Thus, the work efficiency of the operator processing the rope groove 108a can be improved, and the workload of the operator processing the rope groove 108a can be reduced.

[0170] Implementation method 4.

[0171] Figure 27 This is an explanatory diagram showing the structure of the groove machining system in Embodiment 4. In this embodiment, the rope groove 105a of the deflector wheel 105 is machined by the groove machining system. That is, in this embodiment, the rope wheel that the groove machining system processes is the deflector wheel 105.

[0172] When machining the rope groove 105a of the guide wheel 105 using the groove machining system, similarly to Embodiment 2, a portion of the multiple ropes 109 are unloaded from the guide wheel 105, leaving the remaining ropes 109 wound around the guide wheel 105. Therefore, when machining the rope groove 105a of the guide wheel 105 using the groove machining system, only the remaining ropes 109 are continuously wound around the drive pulley 108 and the guide wheel 105. The guide wheel 105 rotates in conjunction with the rotation of the drive pulley 108 via the remaining ropes 109. In this embodiment, the groove machining system is installed in the machine room 102 with a portion of the multiple ropes 109 unloaded from the guide wheel 105.

[0173] The structure of the groove processing system in this embodiment is the same as that in embodiment 3. In this embodiment, the groove processing unit 1 is mounted on the floor of the machine room 102 via the mounting component 4. Thus, the groove processing unit 1 can be loaded and unloaded relative to the floor of the machine room 102.

[0174] The groove processing unit 1 is positioned radially outward from the deflector wheel 105. Furthermore, the groove processing unit 1 is positioned opposite the portion of the outer periphery of the deflector wheel 105 where the rope 109 has been removed.

[0175] The machining tool 5 of the groove machining unit 1 is configured such that the tip 5a is opposite to the rope groove 105a of the guide wheel 105. In this embodiment, as... Figure 27 As shown, the tip 5a is an arc shape with an outer diameter that is the same as the machined inner diameter of the rope groove 105a.

[0176] The machining tool 5 contacts the inner surface of the rope groove 105a of the deflector wheel 105 while the deflector wheel 105 and the drive rope wheel 108 are rotating in conjunction, thereby machining the rope groove 105a. The machining tool 5 performs machining on the rope groove 105a into which the rope 109 is inserted by changing the position of the rope 109 to other rope grooves 105a.

[0177] When the deflector pulley 105 rotates in conjunction with the drive pulley 108, the rotational speed of the deflector pulley 105 corresponds to the rotational speed of the drive pulley 108. Therefore, when machining the rope groove 105a using the machining tool 5, the rotation of the drive pulley 108 and the deflector pulley 105 is controlled by the operation control device 106. The groove machining control unit 2 sends control commands to the operation control device 106 to control the operation control device 106, thereby controlling the rotational speed of the drive pulley 108 and the deflector pulley 105. Other structures and groove machining methods are the same as in Embodiment 3.

[0178] Thus, even when the groove machining system of Embodiment 3 is applied to the machining of the deflector wheel 105, the vibration generated by the machining tool 5 during the machining of the rope groove 105a of the deflector wheel 105 can be suppressed. Furthermore, by continuing to machine the rope groove 105a with the machining tool 5, unevenness generated on the inner surface of the rope groove 105a can be repaired. Therefore, the work efficiency of the operator machining the rope groove 105a of the deflector wheel 105 can be improved, and the workload of the operator machining the rope groove 105a of the deflector wheel 105 can be reduced.

[0179] Furthermore, in embodiments 2 and 4, when processing the rope groove 105a of the deflector wheel 105 using the groove processing system, a portion of the rope 109 is unloaded from the deflector wheel 105. However, as long as the processing tool 5 of the groove processing unit 1 can be positioned opposite the portion of the outer periphery of the deflector wheel 105 other than the portion where each rope 109 is wound, the rope groove 105a can be processed without unloading the rope 109 from the deflector wheel 105.

[0180] Implementation method 5.

[0181] Figure 28 This is a schematic diagram showing the state in which the cutting tool 5's tip 5a in the groove machining system of Embodiment 5 is machining the rope groove 108a of the drive pulley 108. The machining tool 5 is a lathe tool having a cutting tool tip 5a. The cross-sectional shape of the cutting tool tip 5a in the plane including the axis of the drive pulley 108 is an arc shape with a diameter smaller than the inner diameter of the rope groove 108a of the drive pulley 108. In this embodiment, the cutting tool tip 5a is spherical.

[0182] The movable device 6 of the machining tool enables the cutting tip 5a to move relative to the rope groove 108a along the inner circumferential direction of the groove. The inner circumferential direction of the groove is the direction along the inner surface of the rope groove 108a in a plane including the axis of the drive pulley 108. The groove machining control unit 2 controls the current supplied to the movable device 6 of the machining tool to change the position of the cutting tip 5a relative to the rope groove 108a along the inner circumferential direction of the groove. The groove machining control unit 2 adjusts the position of the cutting tip 5a relative to the rope groove 108a in the inner circumferential direction of the groove by controlling the current supplied to the X-direction drive motor 64 and the Z-direction drive motor 65 respectively.

[0183] In the plane containing the axis of the drive sheave 108, an XZ coordinate plane is defined, perpendicular to the X-axis along the X direction and the Z-axis along the Z direction at a predetermined origin O. The groove machining control unit 2 regenerates the cross-sectional shape of the rope groove 108a by adjusting the position of the cutting tip 5a relative to the rope groove 108a in the XZ coordinate plane. The cross-sectional shape of the rope groove 108 after machining by the cutting tip 5a is arc-shaped in the plane containing the axis of the drive sheave 108.

[0184] If the outer peripheral surface of the drive sheave 108 is set as the groove reference surface 108c, then in the XZ coordinate plane, the Z coordinate of the groove reference surface 108c is defined as Z. h Furthermore, in the XZ coordinate plane, the coordinates of the lowest point of the rope groove 108a are defined as (X0, Z). t If the depth of the processed rope groove 108a is set as Δt, then the coordinates of the lowest point of the rope groove 108a are (X0, Z). t ) is represented as (X0, Z) h +Δt).

[0185] Furthermore, in the XZ coordinate plane, the coordinates of the center point Q in the cross-sectional shape of the machined rope groove 108a are defined as (X0, Z0). If the inner diameter of the machined rope groove 108a is set to R, then the coordinates (X0, Z0) of the center point Q are represented as (X0, Z0). t -R).

[0186] The inner surface of the rope groove 108a is divided into multiple sector-shaped regions centered at the center point Q, and each sector is machined by the cutting tip 5a. The center angle θ of each sector is obtained by dividing 180° by the number of sectors.

[0187] If the position of the point where the cutting tip 5a contacts the inner surface of the rope groove 108a is defined as the machining position of the cutting tip 5a, then the machining position P of the cutting tip 5a is... i Target coordinates (X) i Z i The angle is set according to the center angle θ of each sector. The machining position P of the tool tip 5a is specified. i In this context, 'i' is the sequential number assigned to the machining position at the tool tip 5a along the inner circumferential direction of the groove. Therefore, 'i' is an integer greater than or equal to 1 and less than or equal to k+1, i.e., an integer 1 ≤ i ≤ k+1. 'k' is the number of sector regions, represented by k = 180 / θ.

[0188] Whenever the cross-sectional shape of the rope groove 108a at the machining position of the tool tip 5a is regenerated, the groove machining control unit 2 sets the target coordinate (X) of the machining position of the tool tip 5a. i Z iThe shapes change sequentially, thereby regenerating the overall cross-sectional shape of the rope groove 108a. Therefore, the machining position of the tool tip 5a is maintained at the target coordinates (X) until the cross-sectional shape of the rope groove 108a is fully regenerated. i Z i When the target coordinates (X) i Z i When the regeneration of the cross-sectional shape of the rope groove 108a at point X is complete, move to the next target coordinate (X). i+1 Z i+1 For example, at the lowest point of the rope groove 108a and the i-th machining position P of the tool tip 5a. i Under the same conditions, the machining position P of the tool tip 5a i Target coordinates (X) i Z i ) is represented by (X0, Z0+R).

[0189] The grooving control unit 2 controls the operation control device 106 in the same way as in Embodiment 1. Furthermore, the grooving control unit 2 controls the current supplied to the movable device 6 of the machining tool in the same way as in Embodiment 1. Therefore, whenever the tool tip 5a is positioned relative to the rope groove 108a, the target coordinate (X) is... i Z i When the operation changes, the groove machining control unit 2 controls the operation control device 106 and the current supplied to the machining tool movable device 6 by the groove machining control unit 2, in the same manner as in Embodiment 1. Other structures and groove machining methods are the same as in Embodiment 1.

[0190] In this grooving system, the cross-sectional shape of the cutting tip 5a in the plane including the axis of the drive sheave 108 is an arc shape with a diameter smaller than the inner diameter of the rope groove 108a. The grooving control unit 2 controls the position of the cutting tip 5a relative to the rope groove 108a along the inner circumference of the groove by controlling the current supplied to the movable device 6 of the machining tool. Therefore, the contact area between the cutting tip 5a of the machining tool 5 and the inner surface of the rope groove 108a can be reduced, and the magnitude of the reaction force of the machining tool 5 on the inner surface of the rope groove 108a can be reduced. This further suppresses chattering of the machining tool 5. Therefore, the work efficiency of the operator when machining the rope groove 108a can be further improved, and the workload of the operator when machining the rope groove 108a can be further reduced.

[0191] Furthermore, in Embodiment 5, the structure that causes the position of the cutting tip 5a of the machining tool 5, which serves as a turning tool, to change in the direction of the inner circumference of the groove is applied to Embodiment 1. However, the structure that causes the position of the cutting tip 5a of the machining tool 5, which serves as a turning tool, to change in the direction of the inner circumference of the groove can also be applied to Embodiment 3.

[0192] Alternatively, the structure of Embodiment 5, which changes the position of the cutting tip 5a of the machining tool 5 as a lathe tool along the inner circumferential direction of the groove, can also be applied to Embodiments 2 and 4. In this case, the cross-sectional shape of the cutting tip 5a in the plane including the axis of the deflector wheel 105 is an arc shape with a diameter smaller than the inner diameter of the rope groove 105a of the deflector wheel 105.

[0193] Furthermore, in each of the above embodiments, the drive pulley 108 or the deflector pulley 105 is the work-object pulley. However, pulleys other than the drive pulley 108 and the deflector pulley 105 may also be used as work-object pulleys. In this case, the rope 109 wound on the drive pulley 108 is wound on the work-object pulley. In this case, the work-object pulley rotates in conjunction with the rotation of the drive pulley 108 via the rope 109.

[0194] Furthermore, in each of the above embodiments, when the determination unit 21 determines that chatter has occurred, the control unit 22 reduces the rotational speed of the drive sheave 108 or the guide sheave 105, which is the target sheave, by controlling the operation control device 106. However, when the determination unit 21 determines that chatter has occurred, the control unit 22 can also increase the rotational speed of the drive sheave 108 or the guide sheave 105, which is the target sheave, from the reference rotational speed n0 [rpm] by controlling the operation control device 106. In this way, resonance of the machining tool 5 can be avoided, and the period T of the acceleration peak of the machining tool 5 can be changed, thereby reducing the magnitude of the acceleration peak of the machining tool 5. Therefore, the workload of the operator machining the rope groove 108a or the rope groove 105a can be reduced. That is, when the determination unit 21 determines that chatter has occurred, the control unit 22 can simply change the rotational speed of the drive sheave 108 or the guide sheave 105, which is the target sheave, by controlling the operation control device 106.

[0195] Furthermore, in each of the above embodiments, when the groove machining control unit 2 determines that chatter has occurred, it supplies current that has passed through a bandpass filter to the movable device 6 of the machining tool. This bandpass filter suppresses peak components in the frequency components of chatter. However, the groove machining control unit 2 may also supply current to the movable device 6 of the machining tool without generating a bandpass filter. In this way, even when the groove machining control unit 2 determines that chatter has occurred, the rotational speed of the drive sheave 108 or the deflector sheave 105, which is the object of machining, can be changed. As a result, chatter generated by the machining tool 5 can be suppressed, and the workload of the operator machining the rope groove 108a or rope groove 105a can be reduced.

[0196] Furthermore, in each of the above embodiments, when the groove machining control unit 2 determines that chatter has occurred, it supplies a current to the machining tool movable device 6 with a frequency that is the same as the frequency of the chatter and a phase that is opposite to the phase of the chatter. However, the groove machining control unit 2 may also supply a current to the machining tool movable device 6 that is not adjusted based on the phase of the chatter. In this way, even when the groove machining control unit 2 determines that chatter has occurred, the rotational speed of the drive sheave 108 or the deflector sheave 105, which is the sheave being machined, can be changed. As a result, chatter generated by the machining tool 5 can be suppressed, and the workload of the operator machining the rope groove 108a or the rope groove 105a can be reduced.

[0197] Furthermore, in each of the above embodiments, when the determination unit 21 determines that chatter has occurred, the control unit 22 changes the depth of cut of the machining tool 5 relative to the inner surface of the rope groove 108a or rope groove 105a. However, when the determination unit 21 determines that chatter has occurred, the control unit 22 may also change the rotational speed of the drive pulley 108 or the deflector pulley 105 instead of changing the depth of cut of the machining tool 5 relative to the inner surface of the rope groove 108a or rope groove 105a. In this way, even if chatter occurs in the machining tool 5, the vibration generated by the machining tool 5 can be suppressed.

[0198] Furthermore, the functions of the groove processing control unit 2 in each of the above embodiments are implemented by a processing circuit. Figure 29 This is a structural diagram of a first example of a processing circuit that implements the functions of the slot processing control unit 2 in each embodiment. The processing circuit 100 in the first example is dedicated hardware.

[0199] Additionally, the processing circuit 100 may be a single circuit, a composite circuit, a programmable processor, a parallel programmable processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a circuit composed of combinations thereof.

[0200] in addition, Figure 30 This is a structural diagram of a second example of a processing circuit that implements the functions of the slot processing control unit 2 in each embodiment. The processing circuit 200 of the second example includes a processor 201 and a memory 202.

[0201] In the processing circuit 200, the functions of the slot machining control unit 2 are implemented through software, firmware, or a combination of software and firmware. The software and firmware are described as programs and stored in the memory 202. The processor 201 implements the functions of the slot machining control unit 2 by reading and executing the programs stored in the memory 202.

[0202] The program stored in memory 202 can also be described as a program that causes the computer to perform the above steps or methods. Here, memory 202 is, for example, a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (Electrically Erasable and Programmable Read Only Memory). Additionally, disks, floppy disks, optical disks, CDs, mini-disks, DVDs, etc., also correspond to memory 202.

[0203] Furthermore, some of the functions of the groove machining control unit 2 can be implemented using dedicated hardware, while others can be implemented using software or firmware.

[0204] In this way, the processing circuit can realize the above-mentioned functions of the slot processing control unit 2 through hardware, software, firmware or a combination thereof.

[0205] The above-described embodiments represent one example of the content of this disclosure. These embodiments can be combined with other known technologies. Without departing from the spirit of this disclosure, parts of the structure of the embodiments can be omitted or modified.

[0206] Hereinafter, examples of the modes that may be included in this disclosure are explicitly described as appendices.

[0207] (Postscript 1)

[0208] A groove processing system, comprising:

[0209] A processing tool that, while the workpiece rope wheel is rotating under the control of a running control device, processes the rope groove by contacting the inner surface of the rope groove formed on the outer periphery of the workpiece rope wheel;

[0210] A movable device for the machining tool, which moves the machining tool relative to the rope groove by receiving an electric current supply;

[0211] A groove machining control unit that controls the current supplied to the movable device of the machining tool; and

[0212] The measuring unit generates a signal corresponding to the vibration produced by the machining tool during the machining of the rope groove as a measuring signal.

[0213] The groove processing control unit generates waveform data representing the vibration based on the measured signal, determines whether the processing tool has generated chatter based on the waveform data, and if chatter is determined to have occurred, controls the operation control device to change the rotational speed of the processing object pulley.

[0214] (Postscript 2)

[0215] According to the groove machining system described in Appendix 1, wherein,

[0216] When the groove processing control unit determines that the chatter has occurred, it changes the rotational speed of the processing object rope wheel and adjusts the position of the processing tool relative to the rope groove by controlling the current supplied to the movable device of the processing tool, thereby changing the cutting depth of the processing tool relative to the inner surface of the rope groove.

[0217] (Note 3)

[0218] According to the groove machining system described in Appendix 1 or 2, wherein,

[0219] The measuring unit is a current measuring device, which measures the current value supplied to the movable device of the machining tool and generates a signal representing the current value as the measuring signal.

[0220] (Note 4)

[0221] According to the groove machining system described in Appendix 1 or 2, wherein,

[0222] The measuring unit is an acceleration sensor, which measures the acceleration of the machining tool and generates a signal representing the acceleration as the measuring signal.

[0223] (Note 5)

[0224] According to any one of Appendices 1 to 4, the groove machining system wherein,

[0225] When the slot machining control unit determines that chatter has occurred, it calculates the frequency components of the chatter based on the waveform data and supplies a current that has passed through a bandpass filter to the movable device of the machining tool. The bandpass filter suppresses the peak components of the frequency components of the chatter.

[0226] (Note 6)

[0227] According to any one of Appendices 1 to 5, the groove machining system wherein,

[0228] When the slot machining control unit determines that the chatter has occurred, it calculates the frequency and phase of the chatter based on the waveform data, and supplies a current with the same frequency as the chatter and opposite phase to the movable device of the machining tool.

[0229] (Note 7)

[0230] According to any one of Appendices 1 to 6, the groove machining system wherein,

[0231] The machining tool is a lathe tool with a cutting tip.

[0232] The cross-sectional shape of the blade tip in the plane containing the axis of the rope pulley being processed is an arc shape with a diameter smaller than the inner diameter of the rope groove.

[0233] The movable device of the machining tool enables the cutting tip to move relative to the rope groove along the inner circumferential direction of the groove, which is a direction along the inner surface of the rope groove in a plane including the axis of the workpiece sheave.

[0234] The groove machining control unit controls the position of the cutting tip relative to the rope groove along the inner circumference of the groove by controlling the current supplied to the movable device of the machining tool.

[0235] (Note 8)

[0236] According to any one of Appendices 1 to 7, the groove machining system wherein,

[0237] The processing object pulley is a deflector pulley located at a position away from the drive pulley of the traction machine.

[0238] The deflector wheel rotates in conjunction with the rotation of the drive sheave via a rope wound around the drive sheave.

[0239] (Note 9)

[0240] A method for machining a groove, comprising:

[0241] In the measurement step, the measuring unit generates a signal corresponding to the vibration as a measurement signal. This vibration is the vibration generated by the processing tool when the processing tool contacts the inner surface of the rope groove formed on the outer periphery of the processing object rope wheel and processes the rope groove under the control of the operation control device while the processing object rope wheel is rotating.

[0242] The determination step involves generating waveform data representing the vibration based on the measured signal, and determining whether the machining tool has generated chatter based on the waveform data via the slot machining control unit; and

[0243] The rope wheel rotation control step involves controlling the rotational speed of the rope wheel on the workpiece based on the determination result in the determination step.

[0244] If, in the determination step, it is determined that the machining tool has generated chatter, in the sheave rotation control step, the rotational speed of the machining object sheave is changed.

Claims

1. A groove processing system, comprising: A processing tool that, while the workpiece rope wheel is rotating under the control of a running control device, processes the rope groove by contacting the inner surface of the rope groove formed on the outer periphery of the workpiece rope wheel; A movable device for the machining tool, which moves the machining tool relative to the rope groove by receiving an electric current supply; A groove machining control unit that controls the current supplied to the movable device of the machining tool; and The measuring unit generates a signal corresponding to the vibration produced by the machining tool during the machining of the rope groove as a measuring signal. The groove processing control unit generates waveform data representing the vibration based on the measured signal, determines whether the processing tool has generated chatter based on the waveform data, and if chatter is determined to have occurred, controls the operation control device to change the rotational speed of the processing object pulley.

2. The groove processing system according to claim 1, wherein, When the groove processing control unit determines that the chatter has occurred, it changes the rotational speed of the processing object rope wheel and adjusts the position of the processing tool relative to the rope groove by controlling the current supplied to the movable device of the processing tool, thereby changing the cutting depth of the processing tool relative to the inner surface of the rope groove.

3. The groove processing system according to claim 1 or 2, wherein, The measuring unit is a current measuring device, which measures the current value supplied to the movable device of the machining tool and generates a signal representing the current value as the measuring signal.

4. The groove processing system according to claim 1 or 2, wherein, The measuring unit is an acceleration sensor, which measures the acceleration of the machining tool and generates a signal representing the acceleration as the measuring signal.

5. The groove processing system according to any one of claims 1 to 4, wherein, When the slot machining control unit determines that chatter has occurred, it calculates the frequency components of the chatter based on the waveform data and supplies a current that has passed through a bandpass filter to the movable device of the machining tool. The bandpass filter suppresses the peak components of the frequency components of the chatter.

6. The groove processing system according to any one of claims 1 to 5, wherein, When the slot machining control unit determines that the chatter has occurred, it calculates the frequency and phase of the chatter based on the waveform data, and supplies a current with the same frequency as the chatter and opposite phase to the movable device of the machining tool.

7. The groove processing system according to any one of claims 1 to 6, wherein, The machining tool is a lathe tool with a cutting tip. The cross-sectional shape of the blade tip in the plane containing the axis of the rope pulley being processed is an arc shape with a diameter smaller than the inner diameter of the rope groove. The movable device of the machining tool enables the cutting tip to move relative to the rope groove along the inner circumferential direction of the groove, which is a direction along the inner surface of the rope groove in a plane including the axis of the workpiece sheave. The groove machining control unit controls the position of the cutting tip relative to the rope groove along the inner circumference of the groove by controlling the current supplied to the movable device of the machining tool.

8. The groove processing system according to any one of claims 1 to 7, wherein, The processing object pulley is a deflector pulley located at a position away from the drive pulley of the traction machine. The deflector wheel rotates in conjunction with the rotation of the drive sheave via a rope wound around the drive sheave.

9. A method for machining a groove, comprising: In the measurement step, the measuring unit generates a signal corresponding to the vibration as a measurement signal. This vibration is the vibration generated by the processing tool when the processing tool contacts the inner surface of the rope groove formed on the outer periphery of the processing object rope wheel and processes the rope groove under the control of the operation control device while the processing object rope wheel is rotating. The determination step involves generating waveform data representing the vibration based on the measured signal, and determining whether the machining tool has generated chatter based on the waveform data by the slot machining control unit. as well as The rope wheel rotation control step involves controlling the rotational speed of the rope wheel on the workpiece based on the determination result in the determination step. If, in the determination step, it is determined that the machining tool has generated chatter, in the sheave rotation control step, the rotational speed of the machining object sheave is changed.

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