Machine tool system and method for controlling machine tool system

Abstract

The purpose of the present invention is to provide a machine tool system and a control method for the machine tool system, which can omit complicated work and have excellent operability. This machine tool system is provided with: a main shaft 25 that can move in the axial direction of a bar W; the guide sleeve 26 is used for supporting the bar W; a first tool holder (27) to which a first tool (T1) for machining the tip portion of the bar (W) supported by the guide sleeve (26) is mounted; a feed rod 44 capable of urging the bar W toward the tip side of the bar W; a first control device (20) that controls the operation of the main shaft (25) and the operation of the first tool holder (27); and a second control device (40) that controls the operation of the feed rod (44). The first control device (20) has a bar retraction mode in which, in a state in which the bar (W) is held by the main shaft (25), the first tool holder (27) processes the tip of the bar (W), the main shaft (25) is retracted and the bar (W) is extracted from the guide sleeve (26), and the second control device (40) releases the urging of the feed rod (44) and releases the holding of the bar (W) by the main shaft (25).

Description

Technical Field

[0001] The invention relates to a machine tool system with a main shaft and a feed rod and a control method of the machine tool system. Background Art

[0002] In the past, a machine tool system had a processing device provided with a spindle or a tool holder, and a material feeder for supplying a long bar to the processing device (for example, refer to Patent Document 1). The spindle of the processing device can rotate while holding the bar in a released state. The spindle is configured to be able to move in the axial direction of the bar in either a state of holding the bar or a state of releasing the holding. The processing device is incorporated with a first control device. The first control device controls the movement of the tool holder or the spindle on which the processing tool is installed according to a processing program (NC program) created by an operator of the machine tool system or an input operation using an operation panel provided on the processing device. The first control device controls the movement of the tool holder or the spindle according to the processing program, so that the front end portion of the bar is processed into a desired shape and the processed portion is cut off after processing. In most cases, the bar is held by the spindle from the start of processing by the processing tool to the cutting off of the processed portion. The processing device grabs the bar after cutting off the processed portion. During the gripping, the spindle is released from the holding and moves to the rear end of the bar, and then the spindle holds the bar again. By repeating the processing of the processing tool and the gripping of the bar for a plurality of cycles, a plurality of products corresponding to the number of cycles are manufactured from one bar. In addition, when manufacturing a product having a length exceeding the movable distance of the spindle, the gripping action may be included in one cycle.

[0003] The material feeder and the processing device are arranged on the rear end side of the bar material more closely than the processing device. The material feeder comprises: a feed rod; a feed rod driving mechanism for moving the feed rod in the axial direction of the bar material; and a second control device for controlling the operation of the feed rod driving mechanism. The feed rod is provided with a finger-shaped chuck at the front end. The feed rod is connected to the bar material by the finger-shaped chuck gripping the rear end portion of the bar material. Moreover, the bar material put into the material feeder is supplied to the processing device by the feed rod driving mechanism sending the feed rod toward the front end side of the bar material. When the processing device is processing, the feed rod applies a force to the bar material from the rear end side of the bar material to the front end side of the bar material with a prescribed load. The load is set to a relatively weak load that does not cause sliding between the bar material and the main shaft when the main shaft holds the bar material.

[0004] [Background Technology Literature]

[0005] [Patent Document]

[0006] Patent Document 1: Japanese Patent Application Publication No. 2005-313267 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] In the conventional machine tool system, the first control device controls the operation of the processing device such as the tool rest or the spindle, and the second control device controls the operation of the material feeder such as the feed rod. Therefore, when the machine tool system is powered on or turned off, for example, the operator needs to go back and forth between the processing device and the material feeder, and instruct or operate the first control device and the second control device in a prescribed order, which is a complicated operation. In addition, there is a concern that the operator may make a mistake in the operation order during the operation.

[0009] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a machine tool system and a control method of the machine tool system that are easy to operate and can omit complicated operations.

[0010] [Technical means to solve the problem]

[0011] The machine tool system of the present invention for solving the above-mentioned problems is characterized by comprising:

[0012] A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod;

[0013] A guide sleeve is arranged closer to the front end side of the rod than the main shaft and supports the rod;

[0014] a tool holder on which a processing tool for processing the front end portion of the rod supported by the guide sleeve is mounted;

[0015] A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar;

[0016] A first control device controls the movement of the spindle and the movement of the tool holder; and

[0017] a second control device for controlling the movement of the feed rod; and

[0018] The first control device has a rod retraction mode, and the rod retraction mode causes the tool holder to process the front end of the rod while the spindle is holding the rod, causes the spindle to retreat and extract the rod from the guide sleeve, and causes the second control device to release the force applied by the feed rod and release the spindle from holding the rod.

[0019] According to the machine tool system, since a series of operations including the operation of the feed rod are executed under the control of the first control device in the bar retracting mode, it is not necessary to instruct or operate the first control device and the second control device in a predetermined order.

[0020] Here, the first control device may be a device that, in the bar retracting mode, causes the tool holder to process the front end of the bar in a state where the feed rod applies force to the bar toward the front end side of the bar.

[0021] The machine tool system may also include:

[0022] an input unit for inputting instructions to the first control device; and

[0023] The bar retracting mode is a mode activated by inputting the instruction from the input unit.

[0024] The bar retracting mode can be easily activated by inputting the instruction.

[0025] The machine tool system of the present invention for solving the above-mentioned problems is characterized by comprising:

[0026] A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod;

[0027] a tool holder on which a processing tool for processing the front end portion of the bar is mounted;

[0028] A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar;

[0029] A first control device controls the movement of the spindle and the movement of the tool holder; and

[0030] a second control device for controlling the movement of the feed rod; and

[0031] The first control device has a rod supply mode, in which the second control device operates the feed rod to move the rod to a position where the front end portion of the rod passes through the spindle and protrudes further toward the front end than the spindle, so that the spindle holds the rod, and the second control device operates the feed rod to apply force to the front end side of the rod, so that the tool holder cuts off the front end of the rod.

[0032] According to the machine tool system, since a series of operations including the operation of the feed rod are executed under the control of the first control device in the bar supply mode, it is not necessary to instruct or operate the first control device and the second control device separately in a predetermined order.

[0033] In addition, the machine tool system may also include:

[0034] an input unit for inputting instructions to the first control device; and

[0035] The bar material supply mode is a mode activated by inputting the instruction from the input unit.

[0036] The bar material supply mode can be easily activated by inputting the instruction.

[0037] The control method of a machine tool system of the present invention for solving the above-mentioned problems is characterized in that it is a control method of a machine tool system comprising the following components:

[0038] A spindle holds a bar and can move in the axial direction of the bar; a guide sleeve supports the bar; a processing tool processes the front end portion of the bar supported by the guide sleeve; and a feed rod can apply force to the bar from the rear end side of the bar to the front end side of the bar; and the control method of the machine tool system has:

[0039] A front end processing step, in which the processing tool processes the front end of the rod while the spindle holds the rod;

[0040] A bar extraction process is performed after the front end processing process, and the spindle is retracted and the bar is extracted from the guide sleeve;

[0041] a force release step, executed subsequent to the bar extraction step, to release the force applied by the feed rod; and

[0042] The fixing release step is performed after the force release step to release the fixing of the rod by the spindle.

[0043] According to the control method of the machine tool system, since the front end processing step, the bar extracting step, the force release step, and the clamp release step are executed in series, the complicated work of instructing or operating each step can be omitted.

[0044] Here, the front end processing step may be a step in which the processing tool processes the front end of the bar material in a state in which the feed rod applies force to the bar material toward the front end side of the bar material.

[0045] The control method of a machine tool system of the present invention for solving the above-mentioned problems is characterized in that it is a control method of a machine tool system comprising the following components:

[0046] A spindle holds a bar and can move in the axial direction of the bar; a processing tool processes the front end portion of the bar; and a feed rod can apply force to the bar from the rear end side of the bar to the front end side of the bar; and the control method of the machine tool system has the following steps:

[0047] A bar feeding step of operating the feed rod to feed the bar to a position where the front end portion of the bar passes through the spindle and protrudes further toward the front end side than the spindle;

[0048] A holding process, which is performed after the bar feeding process, so that the main shaft holds the bar;

[0049] a force application step, which is performed after the holding step, to move the feed rod and apply force to the bar toward the front end side; and

[0050] The front end cutting-off step is performed after the force applying step, and the processing tool cuts off the front end of the rod.

[0051] According to the control method of the machine tool system, since the bar feeding process, the holding process, the force application process and the front end cutting process are performed in series, the complicated work of instructing or operating each process can be omitted.

[0052] In addition, the machine tool system of the present invention which solves the above-mentioned problem is characterized by comprising:

[0053] A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod;

[0054] A guide sleeve is arranged closer to the front end side of the rod than the main shaft and supports the rod;

[0055] a tool holder on which a processing tool for processing the front end portion of the rod supported by the guide sleeve is mounted;

[0056] A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar;

[0057] A first control device controls the movement of the spindle and the movement of the tool holder; and

[0058] a second control device for controlling the movement of the feed rod; and

[0059] The first control device comprises:

[0060] A bar retraction mode, in which the tool holder processes the front end of the bar while the spindle is holding the bar, the spindle is retracted to extract the bar from the guide sleeve, the second control device releases the force applied by the feed rod, the spindle releases the holding of the bar, and the position of the spindle and the position of the feed rod are stored in the storage unit; and

[0061] The bar supply mode moves the spindle to the position of the spindle stored in the storage section and the second control device operates the feed rod to move the feed rod to the position of the feed rod stored in the storage section, so that the spindle holds the bar, and the second control device operates the feed rod to apply force to the front end side of the bar, so that the tool holder cuts off the front end of the bar.

[0062] According to the machine tool system, since a series of actions including the action of the feed rod are executed under the control of the first control device in the bar retracting mode and the bar supplying mode, it is not necessary to instruct or operate the first control device and the second control device in a predetermined order. In addition, the time and power for moving the feed rod to the origin, and the time and power for moving the feed rod from the origin to the position where the front end of the bar is closer to the front end side than the spindle, are reduced.

[0063] [Effects of the Invention]

[0064] According to the present invention, it is possible to provide a machine tool system with good operability and capable of omitting complicated operations, and a method for controlling the machine tool system. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a front view of the lathe system of this embodiment.

[0066] Figure 2 It is a simple expression Figure 1 A top view of the internal structure of the lathe system is shown.

[0067] Figure 3 Yes means Figure 1 The block diagram of the lathe system's hardware composition is shown.

[0068] Figure 4 Yes means Figure 1 Flowchart of the operation of the bar retracting mode of the lathe system shown.

[0069] Figure 5 Yes means Figure 1 Flowchart of the operation of the bar supply mode of the lathe system shown.

[0070] Figure 6 Yes means Figure 4 A flowchart of the operation of a variation of the bar retracting mode is shown.

[0071] Figure 7 Yes means Figure 5 A flowchart of the operation of a variation of the bar material supply mode is shown. DETAILED DESCRIPTION

[0072] Below, refer to the attached Figure 1 In this embodiment, the present invention is described using an example in which the present invention is applied to a lathe system including an NC lathe and a material feeder.

[0073] Figure 1 It is a front view of the lathe system of this embodiment.

[0074] like Figure 1 As shown, the lathe system 1 of this embodiment includes a processing device, namely an NC lathe 2, and a material supply device, namely a material feeder 4. The lathe system 1 is equivalent to an example of a machine tool system. The NC lathe 2 of this embodiment is a so-called Swiss-type lathe. The NC lathe 2 includes a cutting room 22, a spindle room 23, and a lathe operation panel 24. The cutting room 22 is a place where a processed bar W (reference Figure 2 ) is located on the right side of the NC lathe 2 when viewed from the front. The spindle room 23 is a room in which the spindle 25 (see Figure 2 ) is located on the left side of the NC lathe 2 when viewed from the front.

[0075] The lathe operation panel 24 includes a lathe operation unit 241 and a lathe display screen 242. The lathe operation unit 241 includes a plurality of buttons or keys for accepting input operations of the operator of the lathe system 1. The lathe operation unit 241 is equivalent to an example of an input unit. In addition, the lathe operation unit 241 can also be a touch panel integrated with the lathe display screen 242. The operator of the lathe system 1 can store the machining program created using the lathe operation unit 241 or an external computer in the storage unit 203 described later (refer to Figure 3 ). In addition, the operator of the lathe system 1 can also use the lathe operating unit 241 to modify the machining program and store the modified machining program in the storage unit 203. In addition, the operator of the lathe system 1 can also use the lathe operating unit 241 to make each component of the lathe system 1 operate individually or in combination. The lathe display screen 242 is a display that displays various information related to the lathe system 1, such as the machining program stored in the storage unit 203, various setting values ​​of the lathe system 1, and error contents.

[0076] The material feeder 4 supplies the long bar material W to the NC lathe 2 (refer to Figure 2 ). The material feeder 4 is arranged in parallel with the NC lathe 2. A plurality of rods W are stored in the material feeder 4. The material feeder 4 delivers one of the stored rods W to the NC lathe 2. In addition, the material feeder 4 extracts and discharges the rods W shortened by processing, that is, the remaining material, from the NC lathe 2. After discharging the remaining material, the material feeder 4 delivers another rod W from the stored rods W to the NC lathe 2. The material feeder 4 is provided with an input device for operating the material feeder 4, that is, a material feeder operation panel 42.

[0077] Figure 2 It is a simple expression Figure 1 A top view of the internal structure of the lathe system is shown.

[0078] like Figure 2As shown in FIG. 1 , the NC lathe 2 includes a spindle 25, a guide bushing 26, a first tool rest 27, a back spindle 28, and a second tool rest 29. The spindle 25, the guide bushing 26, the first tool rest 27, the back spindle 28, and the second tool rest 29 are arranged on a base, that is, a foot. The spindle 25, the first tool rest 27, the back spindle 28, and the second tool rest 29 are operated according to a machining program or from a lathe operation panel 24 (see FIG. 1 ). Figure 1 ) input to perform the action.

[0079] The spindle 25 can move in the Z1 axis direction. In addition, the spindle 25 is moved in the Z1 axis direction together with the spindle table, but the spindle table is omitted in the figure and the description is also omitted. The Z1 axis direction is the horizontal direction. Figure 2 The left and right directions are in the middle. The Z1-axis direction corresponds to the axial direction of the rod W. The spindle 25 has a spring chuck 251 at the front end portion for releasably holding the rod W that passes through its interior. The spring chuck 251 corresponds to an example of a holding portion. The spindle 25 holds the rod W and can rotate around the spindle center line CL. The direction of the spindle center line CL is consistent with the Z1-axis direction. In the following, the movement of the spindle 25 toward the front end side of the rod W is sometimes referred to as forward movement, and the movement of the spindle 25 toward the rear end side of the rod W is sometimes referred to as backward movement.

[0080] The guide sleeve 26 is fixed to the base, that is, the foot. The end surface of the guide sleeve 26 opposite to the side where the spindle 25 is arranged is located in the cutting chamber 22 (reference Figure 1 ) is exposed inside the main spindle 25. The guide sleeve 26 supports the front end side portion of the rod W that passes through the inside of the main spindle 25 so that it can slide freely in the Z1-axis direction. The portion of the guide sleeve 26 that supports the rod W can rotate synchronously with the main spindle 25 around the main spindle center line CL. The front end portion of the rod W that protrudes from the guide sleeve 26 into the cutting chamber 22 is processed by the first tool T1 installed on the first tool holder 27. The first tool T1 is equivalent to an example of a processing tool. Since the guide sleeve 26 is used to suppress the deflection of the rod W during processing, the NC lathe 2 can process a particularly slender rod W with high precision.

[0081] The first tool rest 27 can move in the X1-axis direction which is orthogonal to the Z1-axis direction and faces the horizontal direction, and in the Y1-axis direction which faces the vertical direction. The first tool rest 27 is an example of a tool rest. Figure 2In the figure, the up-down direction is the X1-axis direction, and the direction perpendicular to the paper surface is the Y1-axis direction. On the first tool rest 27, a plurality of first tools T1 including cutting tools, cutting tools, etc. are arranged in the Y1-axis direction and installed in a comb-tooth shape. In addition, as the first tool T1, a rotary tool such as an end mill or a drill can also be installed on the first tool rest 27. By moving the first tool rest 27 in the Y1-axis direction, an arbitrary first tool T1 is selected from the plurality of first tools T1. Moreover, by moving the first tool rest 27 in the X1-axis direction, the selected first tool T1 cuts into the front end portion of the rod W held by the spindle 25 and supported by the guide sleeve 26 to perform processing, or cuts off the processed portion of the rod W.

[0082] The back spindle 28 can move in the X2-axis direction and the Z2-axis direction. In addition, the back spindle 28 is moved in the X2-axis direction and the Z2-axis direction together with the back spindle stage, but the back spindle stage is omitted in the figure and the description is also omitted. The X2-axis direction is the same direction as the X1-axis direction, and the Z2-axis direction is the same direction as the Z1-axis direction. In addition, the Z2-axis direction is equivalent to the axial direction of the back spindle 28. Figure 2 In the figure, it is shown that the back spindle 28 is located opposite to the main spindle 25 via the guide sleeve 26. In the position, the rotation center of the back spindle 28, that is, the back spindle center line is arranged on the same line as the main spindle center line CL. The direction of the back spindle center line is consistent with the Z2 axis direction. The processed portion of the bar W that has been processed using the main spindle 25 is cut off by the first tool T1 for cutting and handed over to the back spindle 28. Hereinafter, the cut off processed portion will be referred to as the cut portion. The back spindle 28 can release the holding of the cut portion handed over from the main spindle 25. In addition, the back spindle 28 transfers the held cut portion by moving in the X2 axis direction and the Z2 axis direction.

[0083] The second tool rest 29 can move in the Y2-axis direction. In addition, the second tool rest 29 can also be configured to be movable in the X2-axis direction. The Y2-axis direction is the same direction as the Y1-axis direction. The second tool rest 29 is mounted with a second tool T2 such as a drill or an end mill for processing the cut portion. In addition, the second tools T2 are arranged in the Y2-axis direction, and a plurality of the second tools T2 are mounted on the second tool rest 29. By moving the second tool rest 29 in the Y2-axis direction, an arbitrary second tool T2 is selected from the plurality of second tools T2. Then, the back spindle 28 is moved in the X2-axis direction or the Z2-axis direction to process the cut end side of the cut portion held by the back spindle 28. The cut portion whose processing on the cut end side is completed becomes a product manufactured by the lathe system 1. In addition, there is also a case where processing is not performed using the back spindle 28. In the case, the cut portion directly becomes a product. The second tool rest 29 is provided with a product receiving port 291 for receiving the product and a discharge chute not shown. The unloading chute is provided in the second tool rest 29. After the back spindle 28 inserts the product into the product receiving port 291, the back spindle 28 releases the holding and pushes out the product by the cylinder provided in the back spindle 28, thereby dropping the product into the unloading chute. The dropped product is transferred to a predetermined position by a conveyor (not shown) and discharged to a product storage section provided outside the lathe system 1.

[0084] In the cutting room 22 (reference Figure 1 ), a chip receiving portion 221 for receiving chips or defective products generated by processing using the main spindle 25 or the back spindle 28 is provided at the lower end of the main spindle 25. The processed portion of the bar material W that has been processed using the main spindle 25 is cut off by the first tool T1 for cutting processing while the back spindle 28 and the main spindle 25 rotate synchronously with the main spindle 25 at a position opposite to the main spindle 25 and hold the bar material W respectively, and then the processed portion is handed over to the back spindle 28. On the other hand, when the processed portion is cut off in a state where the back spindle 28 does not hold the processed portion, the processed portion is discharged to the chip receiving portion by falling.

[0085] The material feeder 4 has the material feeder operation panel 42 (see Figure 1 ), the rod 44 also has a feed rod 44, a feed rod driving mechanism 45, a feed rod motor 46, a front end sensor 47, and an origin sensor 48. The feed rod 44 is guided by a guide member (not shown) so as to be movable in the Z1-axis direction. At the front end of the feed rod 44, a finger-shaped chuck 441 is provided for holding the rear end of the bar W. The finger-shaped chuck 441 is rotatably mounted relative to other parts of the feed rod 44, and is rotatable about the spindle center line CL as the rotation center axis. The feed rod 44 is connected to the bar W by holding the rear end of the bar W with the finger-shaped chuck 441. That is, while the bar W is held by the finger-shaped chuck 441, the feed rod 44 moves in the Z1-axis direction together with the bar.

[0086] The feed rod driving mechanism 45 is composed of pulleys (not shown) respectively provided at the front end side and the rear end side of the feeder 4, and a driving belt mounted on the pulleys. A connecting portion 451 is fixed to the driving belt. The driving belt is connected to the rear end portion of the feed rod 44 by the connecting portion 451. The pulley provided at the rear end side of the feeder 4 is fixed to the output shaft of the feed rod motor 46.

[0087] If the output shaft of the feed rod motor 46 rotates in one direction, the feed rod 44 moves along the Z1 axis toward the NC lathe 2 through the feed rod drive mechanism 45 and the connection part 451. On the contrary, if the output shaft of the feed rod motor 46 rotates in the other direction, the feed rod 44 moves in the direction away from the NC lathe 2 along the Z1 axis through the feed rod drive mechanism 45 and the connection part 451. Among the plurality of rods W stored in the material feeder 4, the rod W whose axis is located at a position consistent with the spindle center line CL is held by the finger-shaped chuck 441. Moreover, as the feed rod 44 moves, the rod W held by the finger-shaped chuck 441 moves in the axis direction of the rod W. That is, if the output shaft of the feed rod motor 46 rotates in one direction, the rod W moves toward its front end side, and if the output shaft of the feed rod motor 46 rotates in the other direction, the rod W moves toward its rear end side. The feed rod motor 46 has a feed rod encoder 461. In addition, the feed rod encoder 461 may be provided separately from the feed rod motor 46. The feed rod encoder 461 detects the number of rotations or the amount of rotation of the feed rod motor 46. The detection result of the feed rod encoder 461 is sent to the second control device 40 (refer to Figure 3 ).

[0088] The front end sensor 47 detects the front end of the rod W. In addition, the origin sensor 48 detects whether the feed rod 44 is at the origin. The origin of the feed rod 44 is located at the rear end side of the moving range of the feed rod 44. The detection results of the front end sensor 47 and the origin sensor 48 are respectively sent to the second control device 40 (refer to Figure 3 ). The second control device 40 grasps the position of the front end of the bar material W before processing based on the detection results of the front end sensor 47 and the detection results of the feed rod encoder 461. The feed rod encoder 461 and the front end sensor 47 are equivalent to an example of a bar material front end position detection mechanism. In addition, the second control device 40 grasps the position of the feed rod 44 based on the detection results of the origin sensor 48 and the detection results of the feed rod encoder 461. The feed rod encoder 461 and the origin sensor 48 are equivalent to an example of a feed rod position detection mechanism.

[0089] Figure 3 Yes means Figure 1 The hardware structure of the lathe system is shown in FIG. Figure 3In the hardware configuration of the lathe system 1 , those that are less relevant to the present invention and are therefore not shown in the drawings even if they are to operate the components described so far.

[0090] like Figure 3 As shown, the NC lathe 2 has a first control device 20, the lathe operation panel 24, a Z1-axis motor 252, a spindle motor 253, and a spindle actuator 254. The first control device 20 is a so-called NC (Numerical Control) device, and has a CPU (Central Processing Unit) 201, a PLC (Programmable Logic Controller) 202, and a storage unit 203. The first control device 20 is a computer having a computing function of the CPU 201. The first control device 20 controls the machining process according to the machining program stored in the storage unit 203 or the input from the lathe operation panel 24. Figure 2 The operations of the components such as the spindle 25, the first tool rest 27, the back spindle 28 and the second tool rest 29 are shown. In addition, in the storage unit 203, in addition to the machining program created by the operator, various programs such as ladder programs and macro programs are also stored in advance. Figure 3 , indicating a part of the motor or actuator driving each component. The first control device 20 mainly performs numerical control on the servo motor provided on the NC lathe 2. In addition, the PLC 202 of the first control device 20 mainly performs sequence control on the actions of machines other than the servo motor such as the cylinder or valve provided on the NC lathe 2. The storage unit 203 is composed of non-volatile memories such as ROM (Read Only Memory), HDD (Hard Disc Drive) and SSD (Solid State Drive) and volatile memories such as RAM (Random Access Memory).

[0091] The Z1-axis motor 252 is a servo motor that rotates in response to a command from the first control device 20. Figure 2 ) moves in the Z1-axis direction. In addition, an amplifier (not shown) is provided between the first control device 20 and the Z1-axis motor 252, and the first control device 20 controls the Z1-axis motor 252 by sending instructions to the amplifier. Hereinafter, the description of the amplifier is omitted. The Z1-axis motor 252 has a Z1-axis encoder 2521. By feeding back the output of the Z1-axis encoder 2521 to the first control device 20, the first control device 20 always grasps the spindle 25 (refer to Figure 2) on the Z1 axis. The Z1 axis encoder 2521 is equivalent to an example of a spindle position detection mechanism.

[0092] On spindle 25 (reference Figure 2 ), a spindle motor 253 such as a built-in motor is provided. The spindle motor 253 receives a command from the first control device 20 to rotate. As the spindle motor 253 rotates, the spindle 25 and the rod W (refer to Figure 2 ) with the spindle centerline CL (reference Figure 2 ) as the center of rotation. In addition, similar to the main shaft 25, the back main shaft 28 is also provided with a back main shaft motor, but the description thereof is omitted. The main shaft actuator 254 is used to make the spring chuck 251 (refer to Figure 2 ) is operated by an actuator such as a hydraulic cylinder. The spindle actuator 254 moves the chuck sleeve (not shown) to the front end side, the spring chuck 251 is closed, and the rod W is held by the spindle 25. In addition, the chuck sleeve is moved to the rear end side, the spring chuck 251 is opened, and the spindle 25 releases the rod W from being held by the spindle 25.

[0093] The feeder 4 has a second control device 40 in addition to the feeder operation panel 42, the feed rod motor 46, the front end sensor 47 and the origin sensor 48. The second control device 40 is a control device that performs sequence control on each component of the feeder 4. The second control device 40 controls the action of the feed rod motor 46 or an actuator (not shown) provided in the feeder 4 based on information received from each sensor or the feed rod encoder 461. In addition, the second control device 40 controls the action of the feeder 4 according to the action request from the first control device 20.

[0094] The feed rod motor 46 is a servo motor that rotates in response to a command from the second control device 40. The feed rod 44 (see Figure 2) moves in the Z1-axis direction. As described above, the second control device 40 grasps the moving distance of the feed rod 44 from the origin by the detection result of the origin sensor 48 and the detection result of the feed rod encoder 461, and always grasps the position of the feed rod 44 in the Z1-axis direction, and sends it to the first control device 20 as information related to the material feeder 4. In addition, the second control device 40 sends the position of the front end of the newly supplied bar W or the front end of the bar W first sent to the NC lathe 2 after the power is turned on to the first control device 20. After the NC lathe 2 starts processing, the second control device 40 controls the feed rod motor 46 to rotate in one direction with a basically fixed torque until the residual material starts to be extracted. As a result, the bar W is applied to the front end side of the bar W by the feed rod 44 with a set load. The load is set to a relatively weak load that does not worry about slipping between the bar W and the spindle 25 when the spindle 25 holds the bar W.

[0095] The feeder operation panel 42 is a touch panel in which the operation unit and the display screen are integrated. In addition to the feeder operation panel 42, the feeder 4 is also provided with an emergency stop button and a torque setting switch for the feed rod motor 46. The operator of the lathe system 1 can use the feeder operation panel 42 to manually operate the feed rod 44 (see Figure 2 ) moves in the Z1-axis direction, or inputs various set values ​​of the feeder 4. In addition, the feeder operation panel 42 displays various set values ​​of the feeder 4, various information related to the feeder 4, such as error contents, and operation buttons of the feeder 4.

[0096] The first control device 20 and the second control device 40 are connected by a signal cable. The first control device 20 sends an operation request and the like to the second control device 40 via the signal cable. In addition, the second control device 40 sends various information related to the feeder 4 including the position information of the feed rod 44 to the first control device 20 via the signal cable at any time.

[0097] Figure 4 Yes means Figure 1 Flowchart of the operation of the bar retracting mode of the lathe system shown. Figure 4 The action of the bar retraction mode shown is mainly through Figure 3 The first control device 20 shown controls the operation of the lathe system 1 and performs the operation. Specifically, the first control device 20 performs calculations or determinations related to the operation based on the program stored in the storage unit 203, controls the operation of each component of the NC lathe 2, and sends an operation request to the second control device 40.

[0098] The bar retraction mode is a mode that is activated by inputting an instruction to start the bar retraction mode from the lathe operating unit 241 to the first control device 20. Specifically, the bar retraction mode is activated by pressing the start switch of the bar retraction mode or inputting an instruction to instruct the bar retraction mode in the lathe operating unit 241. The bar retraction mode is a mode used when it is necessary to extract the bar W from the guide sleeve 26 when the lathe system 1 is arranged after finishing the processing of the day or when preparing for the work. The bar retraction mode is executed after the processing of the product is completed. Therefore, usually at the start point of the bar retraction mode, the spindle 25 holds the bar W in a state where the feed rod 44 applies force to the front end side. In addition, the front end of the bar W is in the cutting chamber 22 because it protrudes to the front end side of the guide sleeve 26. In addition, when the spindle 25 does not hold the bar W when the bar retraction mode is started, control is performed to hold the bar W until before step S12 described later. Thereafter, when the feed rod 44 does not apply force to the bar material W, the feed rod 44 is caused to apply force to the bar material W until before step S12.

[0099] In the bar retraction mode, first, the first control device 20 obtains the diameter information of the bar W and the processing dimension information of the front end of the bar W in the bar retraction mode stored in the storage unit 203 and generates a processing instruction (step S11). The processing instruction is an instruction for performing a process for deburring the front end of the bar W, that is, for example, chamfering the front end of the bar W. The processing dimension information can be rewritten by the lathe operating unit 241, and the switching of R chamfering or chamfering (C chamfering) or the chamfering dimension can be changed by rewriting. In addition, the diameter information of the bar W may be extracted from the description in the processing program and stored in the storage unit 203, but there is also a case where the operator causes the storage unit 203 to store something specified separately from the processing program. Thereafter, the processing of the front end of the bar W is performed based on the processing instruction generated in step S11 (step S12). The step S12 is equivalent to an example of a front end processing process.

[0100] Next, the spindle 25 is retracted and the rod W is extracted from the guide sleeve 26 (step S13). In addition, the spindle 25 is directly retracted to the most retracted position, that is, the spindle origin. The above step S13 is equivalent to an example of the rod extraction process. In addition, when extracting the rod W, the moving speed of the spindle 25 is low so as not to damage the guide sleeve 26, and after the rod W is extracted from the guide sleeve 26, the spindle 25 is retracted at a high speed to the spindle origin.

[0101] Next, the first control device 20 causes the second control device 40 to stop the torque of the feed rod motor 46, thereby releasing the force applied by the feed rod 44 to the front end side of the bar W (step S14). After that, the first control device 20 causes the spindle 25 to release the holding of the bar W (step S15). The step S15 is equivalent to an example of the holding release process. Finally, the first control device 20 causes the second control device 40 to retract the feed rod 44, so that the feed rod 44 moves to the origin together with the held bar W (step S16). After the movement is completed, the bar retraction mode ends.

[0102] Figure 5 Yes means Figure 1 Flowchart of the operation of the bar supply mode of the lathe system shown. Figure 5 The operation of the bar supply mode shown is similar to that of the bar retracting mode, which is mainly achieved by Figure 3 The first control device 20 shown controls the operation of the lathe system 1 and performs the operation. Specifically, the first control device 20 performs calculations or determinations related to the operation based on the program stored in the storage unit 203, controls the operation of each component of the NC lathe 2, and sends an operation request to the second control device 40.

[0103] The bar supply mode is a mode started by inputting an instruction to start the bar supply mode from the lathe operation unit 241 to the first control device 20. Specifically, the bar supply mode is started by pressing a start switch of the bar supply mode or inputting an instruction to instruct the bar supply mode in the lathe operation unit 241. The bar supply mode is a mode used when the lathe system 1 can start processing after the power of the lathe system 1 is turned on. When executing the bar supply mode, in most cases, in the clamping release state where the spring chuck 251 of the spindle 25 is opened, the feed rod 44 is located at the origin and the front end of the bar W is located on the rear end side of the spindle 25.

[0104] In the bar supply mode, first, the first control device 20 opens the spring chuck 251 after the spring chuck 251 of the spindle 25 is closed to set the spindle 25 to the clamp release state (step S31). In addition, the first control device 20 moves the feed rod 44 to a position where the front end portion of the bar W passes through the spindle 25 and protrudes further to the front end side than the spindle 25 by the second control device 40 (step S32). The step S32 is equivalent to an example of the bar feeding process. In addition, the second control device 40 grasps the front end position of the bar W by detecting the front end of the bar W by the front end sensor 47 after the power is turned on and the rotation amount of the feed rod encoder 461 thereafter. Then, in step S32, the second control device 40 advances the feed rod 44 by a predetermined distance after the front end sensor 47 detects the front end of the bar W according to the action request from the first control device 20. As a result, the front end of the bar W is located between the spindle 25 and the guide sleeve 26. Furthermore, after moving the feed rod 44 by the predetermined distance, the second control device 40 stops the feed rod motor 46 and notifies the first control device 20 that the bar W has reached the predetermined position.

[0105] When the movement of the feed rod 44 in step S32 is completed, the first control device 20 causes the spindle 25 to hold the bar W (step S33). The step S33 is equivalent to an example of the holding process. Next, the first control device 20 makes an action request to the second control device 40 to cause the feed rod motor 46 to generate torque. As a result, the feed rod 44 applies force to the bar W toward the front end side (step S34). The step S34 is equivalent to an example of the force application process.

[0106] Next, using the position information of the feed rod 44, a cutting processing instruction for cutting off the front end of the bar material W is generated (step S35), the spindle 25 is advanced to a position where the front end of the bar material W can be cut off (step S36), and the front end of the bar material W is cut off by the tool mounted on the first tool holder 27 (step S37). The step S37 is equivalent to an example of the front end cutting process. In addition, before step S37, the first tool holder 27 may be controlled to select the first tool T1 for cutting processing. When the cutting of the front end of the bar material W is completed, the bar material supply mode ends.

[0107] According to the lathe system 1 described above, since the first control device 20 performs a series of actions including the front end processing of the bar W and the release of the force of the feed rod 44 by starting the bar retracting mode, it is not necessary to instruct or operate each of the first control device 20 and the second control device 40 in a predetermined order when the lathe system 1 is turned off. In this way, since the complicated operation of reciprocating instructions or operations between the NC lathe 2 and the feeder 4 can be omitted, the operability of the lathe system 1 is improved. In addition, it is also possible to prevent the operator from making a mistake in the operation sequence. In addition, since the bar retracting mode is started by input from the lathe operating unit 241, a series of actions of the bar retracting mode can be performed by a simple operation. In addition, since the bar W is pulled out from the guide sleeve 26 after the front end of the bar W is processed, it is also possible to prevent the guide sleeve 26 from being damaged by the burr at the front end of the bar W.

[0108] In addition, according to the lathe system 1 described above, since the first control device 20 performs a series of actions including the movement or force application of the feed rod 44 by starting the bar material supply mode, it is not necessary to instruct or operate each of the first control device 20 and the second control device 40 in a prescribed order when the lathe system 1 is started, etc., which was previously required. In this way, since the complicated operation of reciprocating instructions or operations between the NC lathe 2 and the material feeder 4 can be omitted, the operability of the lathe system 1 is improved. In addition, it is also possible to prevent the operator from making a mistake in the operation sequence. In addition, since the bar material supply mode is started by input from the lathe operating unit 241, a series of actions in the bar material supply mode can be performed by a simple operation.

[0109] According to the control method of the lathe system 1 described above, since the front end processing step, the bar extraction step, the force release step, and the holding release step are executed in series by activating the bar retracting mode, the complicated operation of the operator to instruct or operate each step can be omitted. In addition, it is also possible to prevent the guide sleeve 26 from being damaged by the burr at the front end of the bar W. In addition, since the bar feeding mode is activated and the bar delivery step, the holding step, the force application step, and the front end cutting step are executed in series, the complicated operation of the operator to instruct or operate each step can be omitted.

[0110] In the following description, the same reference numerals as those used so far may be used to designate components, controls, and operations having the same names as those of components described so far, and duplicate descriptions may be omitted.

[0111] Figure 6 Yes means Figure 4 Flowchart of the operation of the variation of the bar retracting mode shown.

[0112] like Figure 6As shown, in the bar material retraction mode of the modification, instead of step S16 in which the second control device 40 retracts the feed rod 44 to the origin, the position of the feed rod 44 and the position of the spindle 25 at the time point are stored in the nonvolatile memory constituting the storage unit 203 (step S161). In the bar material retraction mode of the modification, in addition to the effect of the bar material retraction mode of the conventional embodiment, the effect of reducing the time and power for moving the feed rod 44 to the origin is achieved.

[0113] Figure 7 Yes means Figure 5 A flowchart of the operation of a variation of the bar material supply mode is shown.

[0114] The bar supply mode of the variation is performed in Figure 6 After the bar retraction mode of the variation shown in FIG. 1 , the mode used for the lathe system 1 to start machining. In other words, Figure 6 The bar retracting mode of the variation shown is used in conjunction with the bar supplying mode.

[0115] like Figure 7 As shown, in the bar supply mode of the variation, first obtain Figure 6 The position of the feed rod 44 and the position of the spindle 25 stored in step S161 in the bar retracting mode of the variation shown in the figure (step S310). Then, instead of step S32 in which the feed rod 44 is moved to a position where the front end portion of the bar W protrudes further toward the front end side of the spindle 25, the feed rod 44 and the spindle 25 are moved to the position acquired in step S310 (step S321). In addition, before step S36, the distance that the spindle 25 can advance from the position may be calculated from the information of the movable range of the spindle 25 and the information of the position of the spindle 25 at the time point, and the distance that can be advanced may be compared with the distance that the spindle 25 advances in the machining command generated in step S35. If the latter is longer, the lathe system 1 is stopped and an alarm is issued.

[0116] Even in the bar material supply mode of the above-mentioned variation, the same effect as the bar material supply mode of the previous embodiment is achieved. In addition, in step S321, the feed rod 44 is not moved to the origin but directly moved to the position stored in step S161. Figure 5 Compared with the movement of the feed rod 44 in step S32 shown in FIG. 1 , the moving distance of the feed rod 44 in step S321 is shortened, so that the time and power for moving the feed rod 44 can be reduced.

[0117] The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, the back spindle 28 and the second tool rest 29 of the NC lathe 2 can be omitted. In addition, the first control device 20 can also perform other processing or control between each step in the bar retracting mode or the bar supplying mode or in parallel with each step.

[0118] Even if only the constituent elements described in each of the above-described variations are included, the constituent elements can be applied to other variations.

[0119] [Explanation of Symbols]

[0120] 1: Lathe system (machine tool system)

[0121] 20: First control device

[0122] 25: Spindle

[0123] 26: Guide sleeve

[0124] 27: 1st tool holder (tool holder)

[0125] 40: Second control device

[0126] 44: Feed rod

[0127] T1: Tool 1 (processing tool)

[0128] W: Rod.

Claims

1. A machine tool system, characterized in that have: A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod; A guide sleeve is arranged closer to the front end side of the rod than the main shaft and supports the rod; a tool holder on which a processing tool for processing the front end portion of the rod supported by the guide sleeve is mounted; A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar; A first control device controls the movement of the spindle and the movement of the tool holder; and a second control device for controlling the movement of the feed rod; and The first control device has a rod retraction mode, and the rod retraction mode causes the tool holder to process the front end of the rod while the spindle is holding the rod, causes the spindle to retreat and extract the rod from the guide sleeve, and causes the second control device to release the force applied by the feed rod and release the spindle from holding the rod.

2. The machine tool system according to claim 1, characterized in that comprising: an input unit for inputting instructions to the first control device; and The bar retracting mode is a mode activated by inputting the instruction from the input unit.

3. A machine tool system, characterized in that have: A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod; a tool holder on which a processing tool for processing the front end portion of the bar is mounted; A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar; A first control device controls the movement of the spindle and the movement of the tool holder; and a second control device for controlling the movement of the feed rod; and The first control device has a rod supply mode, in which the second control device operates the feed rod to move the rod to a position where the front end portion of the rod passes through the spindle and protrudes further toward the front end than the spindle, so that the spindle holds the rod, and the second control device operates the feed rod to apply force to the front end side of the rod, so that the tool holder cuts off the front end of the rod.

4. The machine tool system according to claim 3, characterized in that comprising: an input unit for inputting instructions to the first control device; and The bar material supply mode is a mode activated by inputting the instruction from the input unit.

5. A control method for a machine tool system, characterized in that The invention relates to a control method of a machine tool system having the following components: a spindle, which holds a bar and can move in the axial direction of the bar; a guide sleeve, which supports the bar; a processing tool, which processes the front end portion of the bar supported by the guide sleeve; and a feed rod, which can apply force to the bar from the rear end side of the bar to the front end side of the bar; and the control method of the machine tool system has the following features: A front end processing step, in which the processing tool processes the front end of the rod while the spindle holds the rod; A bar extraction process is performed after the front end processing process, and the spindle is retracted and the bar is extracted from the guide sleeve; a force release step, executed subsequent to the bar extraction step, to release the force applied by the feed rod; and The fixing release step is performed after the force release step to release the fixing of the rod by the spindle.

6. A control method for a machine tool system, characterized in that The invention relates to a control method of a machine tool system having the following components: a spindle, which holds a bar and can move in the axial direction of the bar; a processing tool, which processes the front end portion of the bar; and a feed rod, which can apply force to the bar from the rear end side of the bar to the front end side of the bar; and The control method of the machine tool system comprises: A bar feeding step of operating the feed rod to feed the bar to a position where the front end portion of the bar passes through the spindle and protrudes further toward the front end side than the spindle; A holding process, which is performed after the bar feeding process, so that the main shaft holds the bar; A force application process is performed after the holding process to move the feed rod and apply force to the rod toward the front end side; and The front end cutting-off step is performed after the force applying step, and the processing tool cuts off the front end of the rod.

7. A machine tool system, characterized in that have: A main shaft capable of releasably holding the rod and being movable in the axial direction of the rod; A guide sleeve is arranged closer to the front end side of the rod than the main shaft and supports the rod; a tool holder on which a processing tool for processing the front end portion of the rod supported by the guide sleeve is mounted; A feed rod capable of applying force to the bar from the rear end side of the bar toward the front end side of the bar; A first control device controls the movement of the spindle and the movement of the tool holder; and a second control device for controlling the movement of the feed rod; and The first control device comprises: In a bar retraction mode, the tool holder processes the front end of the bar while the spindle holds the bar, the spindle is retracted to extract the bar from the guide sleeve, the second control device releases the force applied by the feed rod, the spindle releases the holding of the bar, and the positions of the spindle and the feed rod are stored in a storage unit; and The bar supply mode moves the spindle to the position of the spindle stored in the storage section and the second control device operates the feed rod to move the feed rod to the position of the feed rod stored in the storage section, so that the spindle holds the bar, and the second control device operates the feed rod to apply force to the front end side of the bar, so that the tool holder cuts off the front end of the bar.

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