Grinding machine setting support device

Abstract

To provide a grinder design assistance device capable of reducing a burden on a designer when a grinder is designed.SOLUTION: A grinder design assistance device 6 for assisting designing of a grinder 1 that grinds, by a grindstone 5, workpieces 7, 8 and 9 supported between a tail stock 3 and a main spindle base 2 fixed to a bed 11 to be rotary-driven, comprises: workpiece information acquisition means 61 for acquiring workpiece information relating to the workpieces 7, 8 and 9; position setting means 62 for setting the fixing position of at least one of the tail stock 3 and the main spindle base 2 to the bed 11 on the basis of the acquired workpiece information; and a display 600 that presents the fixing position set by the position setting means 62.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] This invention relates to a grinding machine. setting Grinding machine that supports setting Regarding support devices. [Background technology]

[0002] Conventionally, grinding machines for grinding axial members such as shafts support the workpiece between a headstock and a tailstock, which are a pair of rotating support devices, and grind the workpiece using a grinding wheel while rotating the workpiece with its central axis as the axis of rotation. Some such grinding machines have both the headstock and tailstock that can move back and forth parallel to the central axis of the workpiece (see, for example, Patent Document 1).

[0003] The grinding machine described in Patent Document 1 has a headstock drive unit and a tailstock drive unit attached to the bed. The headstock drive unit has a screw shaft and a pair of headstock guide rails, and the rotation of the screw shaft moves the headstock along the headstock guide rails. Similarly, the tailstock drive unit has a screw shaft and a pair of tailstock guide rails, and the rotation of the screw shaft moves the tailstock along the tailstock guide rails. The headstock and tailstock can move forward and backward within a predetermined range of motion corresponding to the length of the screw shaft. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2018-176298 [Overview of the project] [Problems that the invention aims to solve]

[0005] The grinding machine configured as described above can perform grinding if the axial length of the workpiece is within a range corresponding to the movable range of the spindle headstock and the steady rest. However, for a plurality of workpieces with significantly different lengths, it may be difficult to process these workpieces with a single grinding machine.

[0006] To address such a problem, it is conceivable to unitize one or both of the spindle headstock and the steady rest and make it possible to change the fixed position with respect to the bed. However, in this case, when determining the fixed position, various calculations need to be performed considering the length of the workpiece and the movable range of the spindle headstock and the steady rest, and the setting operation becomes complicated.

[0007] The present invention has been made in view of the above circumstances, and its object is to provide a grinding machine Configure the settings actual The negative support device that reduces the burden. setting It is to provide a support device.

Means for Solving the Problem

[0008] In order to achieve the above object, the present invention provides a grinding machine setting support device for supporting a grinding machine that grinds a workpiece supported and rotationally driven by a pair of rotary support devices fixed to a bed with a grinding wheel, the grinding machine setting support device including: multiple a workpiece information acquisition means for acquiring workpiece information regarding the workpiece; a position setting means for setting a fixed position of at least one of the pair of rotary support devices with respect to the bed based on the workpiece information; and a presentation means for presenting the fixed position set by the position setting means. setting It provides a grinding machine The plurality of workpieces have different axial lengths, and at least one of the pair of rotating support devices has a fixing member fixed to the bed, a support member that supports the ends of the plurality of workpieces, and a moving mechanism that can move the support member relative to the fixing member along the rotation axis direction of the plurality of workpieces within a predetermined range of motion, support device. At least one of the position, shape, or diameter of the workpiece in the axial direction of each of the plurality of workpieces included in the above workpiece based on the workpiece information, a position setting means for setting a fixed position of at least one of the pair of rotary support devices with respect to the bed, and a presentation means for presenting the fixed position set by the position setting means. The position setting means sets the fixing position of the fixing member so that the grinding of the multiple workpieces can be performed without changing the fixing position of the fixing member to the bed. grinding machine setting support device.

Effect of the Invention

[0009] By using the grinding machine setting support device according to the present invention, the burden on the grinding machine Configure the settings actual The negative is reduced.

Brief Description of the Drawings

[0010] [Figure 1] It is a configuration diagram showing a configuration example of a grinding machine. [Figure 2] (a) is a cross-sectional view showing a schematic configuration example of a spindle headstock. (b) is an explanatory view showing a fixing structure of the spindle headstock case to the bed. [Figure 3] (a) is a cross-sectional view showing a schematic configuration example of a steady rest. (b) is an explanatory view showing a fixing structure of the steady rest case to the bed. [Figure 4] It is a block diagram showing a functional configuration of a grinding machine setting support device. [Figure 5] (a), (b), and (c) are external views showing the first to third workpieces. [Figure 6] (a), (b), and (c) are explanatory views showing a state in which the first to third workpieces are supported on the bed together with the spindle headstock, the steady rest, and the vibration damper device.

Modes for Carrying Out the Invention

[0011] [Embodiment] Embodiments of the present invention will be described with reference to FIGS. 1 to 6. Note that the embodiments described below are shown as preferred specific examples for carrying out the present invention, and although there are parts that specifically exemplify various technically preferable technical matters, the technical scope of the present invention is not limited to this specific aspect.

[0012] (Configuration of Grinding Machine) Figure 1 is a diagram showing an example of the configuration of a grinding machine. This grinding machine 1 is for grinding axial workpieces 10 such as rotating shafts. In Figure 1, the left-right direction is the Z direction, the up-down direction is the X direction, and the direction perpendicular to the X and Z directions is the Y direction. The workpiece 10 is supported so that its axial direction is the Z direction. In Figure 1, as an example, a workpiece 10 having two cylindrical workpieces 101 and 102 with different outer diameters is shown, but the grinding machine 1 is capable of grinding various workpieces of different shapes and sizes.

[0013] The grinding machine 1 mainly comprises a bed 11 which serves as a base, a traverse table 12 which is movable in the Z direction relative to the bed 11, a grinding wheel base 13 which is movable in the X direction relative to the traverse table 12, a grinding wheel motor 14 attached to the grinding wheel base 13, a headstock 2 and a tailstock 3 which are a pair of rotational support devices that support and rotate the workpiece 10, a truing device 15 fixed to the headstock 2, a steady rest 4 which suppresses runout of the workpiece 10 during grinding, and a grinding wheel 5. The truing device 15 consists of a truing motor 151 and a truing device 152 attached to the rotating shaft of the truing motor 151.

[0014] The bed 11 is provided with Z-axis guide rails 121 and 122 that guide the traverse table 12 in the Z direction, and the traverse table 12 moves along the Z-axis guide rails 121 and 122 by the rotation of a ball screw 124 driven by a Z-axis motor 123. The traverse table 12 is provided with X-axis guide rails 131 and 132 that guide the grinding wheel base 13, and the grinding wheel base 13 moves along the X-axis guide rails 131 and 132 relative to the traverse table 12 by the rotation of a ball screw 134 driven by an X-axis motor 133.

[0015] A disc-shaped grinding wheel 5 is detachably attached to the rotating shaft 141 of the grinding wheel motor 14, and the grinding wheel 5 is rotationally driven by the grinding wheel motor 14 to grind the workpiece 10. Specifically, for example, a diamond wheel or a CBN (cubic boron nitride) wheel can be used as the grinding wheel 5. The rotation axis O1 of the grinding wheel 5 is parallel to the rotation axis O2 of the workpiece 10. When the grinding surface 5a becomes unevenly worn or runout occurs due to the use of the grinding wheel 5, the grinding surface 5a can be reshaped into a straight line parallel to the rotation axis O1 by truing (reshaping) using the truing device 15. Note that truing shortens the life of the grinding wheel 5 and takes time, so it is desirable to reduce the number and time of truing as much as possible.

[0016] The headstock 2, tailstock 3, and stabilizer 4 are each unitized and detachable from the bed 11. The fixing positions of the headstock 2, tailstock 3, and stabilizer 4 to the bed 11 can be changed according to the size of the workpiece 10, etc. The bed 11 is provided with first and second projections 111 and 112 extending in the Z direction. The headstock 2 and tailstock 3 can each be fixed to any position on the first projection 111 by a plurality of clamp fittings 113 and bolts 114. The second projection 112 is located further from the grinding wheel 5 than the first projection 111, and the stabilizer 4 can be fixed to any position on the second projection 112 by clamp fittings 113 and bolts 114.

[0017] Figure 2(a) is a cross-sectional view showing a schematic configuration example of the headstock 2. The headstock 2 comprises a headstock case 21 as a fixed member fixed to the bed 11, a headstock center 22 as a support member supporting one end of the workpiece 10, a cylindrical ram 25 that rotatably supports the headstock center 22 via a plurality of bearings 23 and a spindle 24, a spindle motor 26 that rotates the headstock center 22, a moving mechanism 27 that moves the headstock center 22 and the spindle 24 linearly forward and backward relative to the headstock case 21, and a transmission mechanism 28 that transmits the rotation of the spindle motor 26 to the headstock center 22. The tip of the headstock center 22 fits into a center hole formed in one end face of the workpiece 10.

[0018] The moving mechanism 27 comprises a moving motor 270, a gear member 271 rotated by the moving motor 270, a nut holder 272 meshed with the gear member 271, a ball screw nut 273 held by the nut holder 272, a ball screw 274 that moves axially by the rotation of the ball screw nut 273, a slider 275 fixed to one end of the ball screw 274, and a connecting member 276 that connects the slider 275 and the ram 25.

[0019] The moving motor 270 is, for example, a servo motor and is housed and fixed in the headstock case 21. The gear member 271 and the ball screw nut 273 are rotatably supported by bearings 277 and 278, respectively, which are held in the headstock case 21. The slider 275 is immobile relative to the headstock case 21 and movable in the Z direction. When the gear member 271 is rotationally driven by the moving motor 270, the ball screw nut 273 rotates relative to the ball screw 274, and the spindle 24 and the headstock center 22 move in the Z direction together with the ram 25.

[0020] The transmission mechanism 28 includes a rotating shaft 281 that rotates integrally with the headstock center 22, a pulley 282 spline-fitted to the rotating shaft 281 so as to be axially movable but not relative to it, and a belt 283 that is wrapped between the motor shaft 261 of the spindle motor 26 and the pulley 282. The pulley 282 is rotatably supported by a bearing 284 held in the headstock case 21.

[0021] The headstock 2 is mounted on the bed 11 such that the headstock center 22 and the ball screw 274 extend in the Z direction. The moving mechanism 27, by the rotation of the moving motor 270, can move the headstock center 22 relative to the headstock case 21 along the rotation axis direction of the workpiece 10 within a predetermined range of motion corresponding to the length of the ball screw 274.

[0022] Figure 2(b) is an explanatory diagram showing the fixing structure of the headstock case 21 to the bed 11. The headstock case 21 has an engaging projection 211 at one end in the X direction that engages with a first projection 111 of the bed 11. At the other end of the headstock case 21 in the X direction, an inclined surface 21a is formed that is inclined with respect to the X and Y directions, with which the clamp fitting 113 abuts. The clamp fitting 113 that fixes the headstock case 21 has a case contact surface 113a that abuts against the inclined surface 21a of the headstock case 21, and a bed contact surface 113b that abuts against the inclined surface 111a at the X-direction end of the first projection 111, and is tightened and fixed to the headstock case 21 by a bolt 114 that is screwed into the headstock case 21. The case contact surface 113a and the bed contact surface 113b of the clamp fitting 113 are inclined with respect to the Y direction so as to press the headstock case 21 against the bed 11.

[0023] Figure 3(a) is a cross-sectional view showing a schematic configuration example of the tailstock 3. The tailstock 3 comprises a tailstock case 31 as a fixed member fixed to the bed 11, a tailstock center 32 as a support member that supports the end of the workpiece 10 opposite to the headstock 2 side, a cylindrical ram 35 that rotatably supports the tailstock center 32 via a plurality of bearings 33 and a tailstock shaft 34, and a moving mechanism 36 that moves the tailstock center 32 and the tailstock shaft 34 linearly forward and backward relative to the tailstock case 31. The tip of the tailstock center 32 fits into a center hole formed on the end face of the workpiece 10 opposite to the headstock 2 side.

[0024] The moving mechanism 36 comprises a moving motor 360, a gear member 361 rotated by the moving motor 360, a nut holder 362 meshed with the gear member 361, a ball screw nut 363 held by the nut holder 362, a ball screw 364 that moves axially by the rotation of the ball screw nut 363, a slider 365 fixed to one end of the ball screw 364, a pressing member 366 fixed to the slider 365, and a coil spring 367 positioned between the pressing member 366 and the ram 35.

[0025] The moving motor 360 is, for example, a servo motor and is housed and fixed in the tailstock case 31. The gear member 361 and the ball screw nut 363 are rotatably supported by bearings 368 and 369, respectively, which are held in the tailstock case 31. The slider 365 is immobile relative to the tailstock case 31 and movable in the Z direction. When the gear member 361 is rotationally driven by the moving motor 360, the ball screw nut 363 rotates relative to the ball screw 364, the coil spring 367 is pressed by the pressing member 366, and the tailstock shaft 34 and tailstock center 32 move in the Z direction together with the ram 35.

[0026] The tailstock 3 is mounted on the bed 11 such that the tailstock center 32 and the ball screw 364 extend in the Z direction. The moving mechanism 36 of the tailstock 3, by the rotation of the moving motor 360, can move the tailstock center 32 along the rotation axis direction of the workpiece 10 relative to the tailstock case 31 within a predetermined range of motion corresponding to the length of the ball screw 364. The workpiece 10 is held between the headstock center 22 and the tailstock center 32.

[0027] Figure 3(b) is an explanatory diagram showing the fixing structure of the tailstock case 31 to the bed 11. The tailstock case 31 has an engaging projection 311 at one end in the X direction that engages with a first projection 111 of the bed 11. At the other end of the tailstock case 31 in the X direction, an inclined surface 31a is formed that is inclined with respect to the X and Y directions, with respect to the clamp fitting 113. The clamp fitting 113 that fixes the tailstock case 31 has a case contact surface 113a that contacts the inclined surface 31a of the tailstock case 31 and a bed contact surface 113b that contacts the inclined surface 111a at the X-direction end of the first projection 111, and is fastened and fixed to the tailstock case 31 by a bolt 114 that is screwed into the tailstock case 31. The case contact surface 113a and the bed contact surface 113b of the clamp fitting 113 are inclined with respect to the Y direction so as to press the tailstock case 31 against the bed 11.

[0028] As shown in Figure 1, the vibration damping device 4 includes a vibration damping device body 41 fixed to the second projection 112 of the bed 11 by a clamp fitting 113 and a bolt 114, and a rest 42 that is movable in the X direction relative to the vibration damping device body 41. The rest 42 has a support surface 42a that contacts the outer circumferential surface of the workpiece 10. The rest 42 suppresses vibration during grinding of the workpiece 10 by supporting the outer circumferential surface of the workpiece 10 with the support surface 42a. The rest 42 moves in the X direction relative to the vibration damping device body 41 by hydraulic pressure of the hydraulic fluid supplied to a cylinder provided in the vibration damping device body 41, for example, and presses the workpiece 10 toward the grinding wheel 5.

[0029] (Grinding machine) setting (Configuration of the support device) Next, the grinding machine 1 configured as described above setting Grinding machine that supports setting The configuration of the support device will be explained.

[0030] Figure 4 shows a grinding machine. setting This is a block diagram showing the functional configuration of the support device 6. Grinding machine setting The support device 6 consists of, for example, a computer 60 and a display 600 connected to the computer 60 as a display means. The computer 60 contains information on the range of motion in which the headstock center 22 can move relative to the headstock case 21, and information on the range of motion in which the tailstock center 32 can move relative to the tailstock case 31, etc. setting The information necessary for processing as support device 6 is registered.

[0031] The computer 60 functions as a workpiece information acquisition means 61, a position setting means 62, a support surface width setting means 63, a machining sequence setting means 64, a grinding wheel position setting means 65, and a machining result prediction means 66, through the execution of a program by the microprocessor. The display 600 presents various setting information set by the position setting means 62, the support surface width setting means 63, the machining sequence setting means 64, and the grinding wheel position setting means 65 to the user, such as a designer, in a visually recognizable manner.

[0032] The workpiece information acquisition means 61 acquires workpiece information, which is information about the workpiece to be ground by the grinding machine 1. This workpiece information includes information about the workpiece to be processed, such as the position, shape, diameter of the workpiece in the axial direction along the central axis, and the required accuracy (dimensional accuracy and surface roughness). The workpiece information acquisition means 61 acquires workpiece information by, for example, reading three-dimensional or two-dimensional CAD data or shape data for AR (Augmented Reality) of the workpiece. Alternatively, the workpiece information acquisition means 61 may acquire workpiece information through operation by a user of a pointing device such as a keyboard or mouse connected to the computer 60.

[0033] The position setting means 62 sets the fixing position of at least one of the headstock case 21 and tailstock case 31 to the bed 11, as well as the fixing position of the stabilizer body 41 to the bed 11, based on the workpiece information acquired by the workpiece information acquisition means 61. Furthermore, when grinding multiple workpieces of different shapes continuously by the grinding machine 1, the position setting means 62 sets the fixing positions of the headstock case 21, tailstock case 31, and stabilizer body 41 so that grinding of multiple workpieces can be performed without changing the fixing positions of the headstock case 21, tailstock case 31, and stabilizer body 41 to the bed 11. Furthermore, when setting the fixing positions of the headstock case 21 and tailstock case 31 to the bed 11, the position setting means 62 takes into consideration the movable range of the headstock center 22 and tailstock center 32 in the headstock 2 and tailstock 3 relative to the headstock case 21 and tailstock case 31, the axial length of the workpiece, and the movable range of the grinding wheel 5 relative to the bed 11 in the Z direction. Specific examples of these fixing position setting methods will be described later.

[0034] The support surface width setting means 63 sets the required width of the support surface 42a of the rest 42. The required width of the support surface 42a is set to a minimum value according to the magnitude of the grinding load received by the workpiece when grinding the portion supported by the rest 42 or its vicinity, and to a maximum value according to the width of the portion of the outer circumferential surface of the workpiece that is in contact with the support surface 42a of the rest 42 that is parallel to the Z direction. The support surface width setting means 63 may set only either the minimum or maximum value of the required width of the support surface 42a.

[0035] The machining sequence setting means 64, when grinding multiple workpieces of a workpiece to be machined with the grinding wheel 5, sets the machining sequence based on the workpiece information acquisition means 61, so that after shaping the grinding wheel 5 by the shaping device 15, it prioritizes machining the workpieces that require high machining accuracy among the multiple workpieces. A specific example of how to set the machining sequence of the workpieces will be described later.

[0036] The grinding wheel position setting means 65 sets the position of the grinding wheel 5 relative to the workpiece when grinding multiple workpieces, such that the overlap width of the grinding wheel width W5 (see Figure 1) of the grinding wheel 5 is reduced when grinding multiple workpieces in succession. Details of this method for setting the position of the grinding wheel 5 will be described later.

[0037] The display 600 shows the fixing positions of the headstock case 21, tailstock case 31, and stabilizer body 41 to the bed 11, as set by the position setting means 62; the required width of the support surface 42a of the rest 42, as set by the support surface width setting means 63; the machining sequence of the workpiece, as set by the machining sequence setting means 64; and the position of the grinding wheel 5 when grinding the workpiece, as set by the grinding wheel position setting means 65. Of these, the fixing positions of the headstock case 21, tailstock case 31, and stabilizer body 41 to the bed 11 are presented to the user by graphically displaying the shapes of the headstock case 21, tailstock case 31, and stabilizer body 41 on the display 600 along with the X and Z coordinates of their respective reference positions in a plan view of the grinding machine 1, for example, as shown in Figure 1.

[0038] The required width of the support surface 42a of the rest 42 is presented to the user, for example, by displaying its upper and lower limits on the display 600. The width W of the support surface 42a of the rest 42 is also displayed on the computer 60. 42 (See Figure 1) Information on multiple different anti-vibration devices 4 may be registered in advance, and information to identify the optimal anti-vibration device 4 from among these multiple anti-vibration devices 4 may be displayed on the display 600.

[0039] The machining sequence of the workpiece is presented to the user by, for example, when the workpiece information acquisition means 61 acquires three-dimensional or two-dimensional CAD data of the workpiece, by adding a string indicating the machining sequence corresponding to each workpiece in the three-dimensional or two-dimensional CAD data and displaying it on the display 600. Similarly, the position of the grinding wheel 5 when grinding each workpiece is also presented to the user by, for example, adding information indicating the position of the grinding wheel 5 when grinding each workpiece to the three-dimensional or two-dimensional CAD data of the workpiece and displaying it on the display 600. Based on the presented information, the user creates a numerical control program (also called an NC program) to control the Z-axis motor 123 and the X-axis motor 133.

[0040] The machining result prediction means 66 generates information about the predicted grinding results when a workpiece is ground according to various setting information set by the position setting means 62, support surface width setting means 63, machining sequence setting means 64, and grinding wheel position setting means 65. This information includes, for example, the machining time required for grinding the workpiece, dimensional accuracy and surface roughness indicating machining quality, and the amount of wear of the grinding wheel 5. The various types of information generated by the machining result prediction means 66 are presented to the user by being displayed on the display 600.

[0041] (Grinding machine) setting (Operation of support devices) Next, the processes performed by the position setting means 62, the support surface width setting means 63, the processing sequence setting means 64, and the grinding wheel position setting means 65 will be explained based on specific examples. Here, we will explain the case in which the first to third workpieces, which have different shapes and sizes, are processed continuously by the grinding machine 1. It is assumed that the grinding wheel 5 has its grinding surface 5a shaped in advance into a straight line parallel to the rotation axis O1. Also, for convenience, in the following explanation, one axial side of the grinding wheel 5 and the first to third workpieces will be referred to as the right side, and the other axial side as the left side.

[0042] Figures 5(a), (b), and (c) are external views showing the first to third workpieces 7, 8, and 9. Figures 6(a), (b), and (c) are explanatory diagrams showing the state in which the first to third workpieces 7, 8, and 9 are supported on the bed 11, together with the headstock 2, tailstock 3, and steady rest 4. In addition, in Figures 6(a), (b), and (c), the positions of the grinding wheel 5 when grinding each workpiece portion of the first to third workpieces 7, 8, and 9 are indicated by dashed lines.

[0043] The first to third workpieces 7, 8, and 9 are one-off production shafts used as parts for industrial machinery such as construction machinery and cargo transfer machines. The first to third workpieces 7, 8, and 9 each have different axial lengths L7, L8, and L9, with the first workpiece 7 having the longest length L7, the third workpiece 9 having the next longest length L9, and the second workpiece 8 having the shortest length L8.

[0044] The first workpiece 7 has a large-diameter workpiece 71, a medium-diameter workpiece 72, and a small-diameter workpiece 73 as workpieces, and also has first to fourth non-grinding sections 701 to 704 that are not ground by the grinding wheel 5. The second workpiece 8 has a large-diameter workpiece 81 and a small-diameter workpiece 82 as workpieces, and also has first and second non-grinding sections 801 and 802 that are not ground by the grinding wheel 5. The third workpiece 9 has a small-diameter workpiece 91 and a large-diameter workpiece 92 as workpieces, and also has first to third non-grinding sections 901 to 903 that are not ground by the grinding wheel 5.

[0045] Width W of the large-diameter machined portion 71 of the first workpiece 7 71 is slightly narrower than the wheel width W5 of the grinding wheel 5. The width W of the medium-diameter machined portion 72 of the first workpiece 7 72 and the width W of the small-diameter machined portion 73 73 are narrower than the width W of the large-diameter machined portion 71. The second workpiece 8 has a width W of the large-diameter machined portion 81 71 and the width W of the small-diameter machined portion 82 81 which are narrower than the width W of the small-diameter machined portion 73 of the first workpiece 7 82 and the width W of the medium-diameter machined portion 72 73 respectively. The third workpiece 9 has a width W of the small-diameter machined portion 91 72 which is wider than the wheel width W5 of the grinding wheel 5, and a width W of the large-diameter machined portion 92 91 which is narrower than the wheel width W5 of the grinding wheel 5. 92 The workpiece information acquisition means 61 acquires, as workpiece information, information on the axial position, width, diameter, and required accuracy of each of the large-diameter machined portion 71, medium-diameter machined portion 72, and small-diameter machined portion 73 of the first workpiece 7, the large-diameter machined portion 81 and small-diameter machined portion 82 of the second workpiece 8, and the small-diameter machined portion 91 and large-diameter machined portion 92 of the third workpiece 9.

[0046] Here, as an example, the large-diameter machined portion 71 of the first workpiece 7 and the small-diameter machined portion 91 of the third workpiece 9 are high-precision machined portions that require grinding with relatively high precision, and the other machined portions (the medium-diameter machined portion 72 and small-diameter machined portion 73 of the first workpiece 7, the large-diameter machined portion 81 and small-diameter machined portion 82 of the second workpiece 8, and the large-diameter machined portion 92 of the third workpiece 9) are low-precision machined portions that can be ground with relatively low precision. The required specification for the surface roughness of the high-precision machined portion is, for example, 0.4 μm Ra, and the required specification for the surface roughness of the low-precision machined portion is, for example, 0.8 μm Ra.

[0047] [[ID=二十九]]

[0048] ​The position setting means 62 first determines the difference between the length L7 of the first workpiece 7, which has the longest axial length, and the length L8 of the second workpiece 8, which has the shortest axial length. It then determines whether this difference is smaller than the sum of the length of the movable range of the headstock center 22 relative to the headstock case 21 and the length of the movable range of the tailstock center 32 relative to the tailstock case 31. If, as a result of this determination, the difference between the length L7 of the first workpiece 7 and the length L8 of the second workpiece 8 is larger than the sum of the lengths of the movable ranges of the headstock center 22 and the tailstock center 32, it is not possible to machine all of the first to third workpieces 7, 8, and 9 while the headstock case 21 and the tailstock case 31 are fixed to the bed 11, and this fact is displayed on the display 600.

[0049] On the other hand, if the sum of the lengths of the movable ranges of the headstock center 22 and tailstock center 32 is greater than or equal to the difference between the length L7 of the first workpiece 7 and the length L8 of the second workpiece 8, the position setting means 62 considers the lengths of the movable ranges of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31 in the headstock 2 and tailstock 3, the axial lengths L7, L8, L9 of the first to third workpieces 7, 8, and 9 respectively, and the movable range of the grinding wheel 5 relative to the bed 11 in the Z direction, and adjusts the bed 1 of the headstock case 21 and tailstock case 31 The fixing positions of the headstock case 21 and tailstock case 31 to the bed 11, as well as the positions of the headstock center 22 and tailstock center 32 in the Z direction relative to the headstock case 21 and tailstock case 31 during grinding of each workpiece, are set so that the large diameter workpiece 71, medium diameter workpiece 72, and small diameter workpiece 73 of the first workpiece 7, the large diameter workpiece 81 and small diameter workpiece 82 of the second workpiece 8, and the small diameter workpiece 91 and large diameter workpiece 92 of the third workpiece 9 can all be ground by the grinding wheel 5 without changing the fixing position to 1.

[0050] The position setting means 62 sets the position of the grinding wheel 5 when grinding the large diameter workpiece 71, the medium diameter workpiece 72, and the small diameter workpiece 73 of the first workpiece 7, as well as the Z-direction positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31, based on the finished outer diameter D of the large diameter workpiece 71, the medium diameter workpiece 72, and the small diameter workpiece 73.71 ,D 72 ,D 73 , and the outer diameter dimension D of the first to fourth non-grinding portions 701 to 704 701 ,D 702 ,D 703 ,D 704 and length L 701 ,L 702 ,L 703 ,L 704 With this in mind, the grinding wheel 5 is set so as not to interfere with the first to fourth non-grinding parts 701 to 704, the spindle 24, or the tailstock spindle 34. The positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31 may be changed when grinding the large diameter workpiece 71, the medium diameter workpiece 72, and the small diameter workpiece 73, respectively. For example, after grinding the large diameter workpiece 71, the positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31 may be changed by the moving mechanisms 27 and 36 to grind the medium diameter workpiece 72 and the small diameter workpiece 73.

[0051] Furthermore, the position setting means 62 sets the position of the grinding wheel 5 when grinding the large-diameter workpiece 81 and the small-diameter workpiece 82 of the second workpiece 8, as well as the Z-direction positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31, based on the finished outer diameter D of the large-diameter workpiece 81 and the small-diameter workpiece 82. 81 ,D 82 , and the outer diameter dimension D of the first and second non-grinding portions 801, 802 801 ,D 802 and length L 801 ,L 802 Taking this into consideration, the grinding wheel 5 is set so as not to interfere with the first and second non-grinding parts 801, 802, the spindle 24, or the tailstock 34, etc.

[0052] Similarly, the position setting means 62 sets the position of the grinding wheel 5 when grinding the small-diameter workpiece 91 and the large-diameter workpiece 92 of the third workpiece 9, as well as the Z-direction positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31, based on the finished outer diameter D of the small-diameter workpiece 91 and the large-diameter workpiece 92. 91 ,D92 , and the outer diameter dimension D of the first to third non-grinding portions 901 to 903 901 ,D 902 ,D 903 and length L 901 ,L 902 ,L 903 Taking this into consideration, the grinding wheel 5 is set so as not to interfere with the first to third non-grinding sections 901 to 903, the spindle 24, or the tailstock 34, etc.

[0053] The position setting means 62 determines, based on the workpiece information acquired by the workpiece information acquisition means 61, whether or not vibration damping by the vibration damping device 4 is necessary for each workpiece portion of the first to third workpieces 7, 8, and 9 during grinding. In this case, when machining the first workpiece 7 and the third workpiece 9, the large-diameter workpiece portion 71 of the first workpiece 7 and the small-diameter workpiece portion 91 of the third workpiece 9, which are high-precision workpieces, are supported by the rest 42 of the vibration damping device 4. In this case, the position setting means 62 sets the fixing position of the vibration damping device body 41 on the bed 11 so that the large-diameter workpiece portion 71 of the first workpiece 7 and the small-diameter workpiece portion 91 of the third workpiece 9 can be supported by the rest 42 of the vibration damping device 4. Furthermore, in order to support the large-diameter workpiece 71 of the first workpiece 7 and the small-diameter workpiece 91 of the third workpiece 9 with the rest 42 of the steady rest 4, the Z-direction positions of the headstock center 22 and tailstock center 32 relative to the headstock case 21 and tailstock case 31 may be adjusted by the moving mechanisms 27 and 36 during machining of the large-diameter workpiece 71 and the small-diameter workpiece 91.

[0054] The processing sequence setting means 64 sets the processing sequence so that the high-precision workpiece is ground with the grinding surface 5a of the grinding wheel 5 shaped. In other words, either the large-diameter workpiece 71 of the first workpiece 7 or the small-diameter workpiece 91 of the third workpiece 9 is ground first, and then when grinding the other of the large-diameter workpiece 71 of the first workpiece 7 or the small-diameter workpiece 91 of the third workpiece 9, the grinding surface 5a of the grinding wheel 5 is shaped prior to that grinding. Here, the large-diameter workpiece 71 of the first workpiece 7 is ground first.

[0055] Furthermore, the processing sequence setting means 64 sets the processing sequence for each workpiece so that the step difference on the grinding surface 5a of the grinding wheel 5 caused by the grinding of the preceding workpiece does not significantly affect the processing accuracy of subsequent workpieces. Since the wear state of the grinding wheel 5 is related to the position and size of the part of the grinding surface 5a used for grinding, the processing sequence setting means 64 works in conjunction with the grinding wheel position setting means 65 to set the processing sequence for the workpieces.

[0056] Next, the machining sequence of each workpiece part of the first to third workpieces 7, 8, and 9, and examples of setting the position of the grinding wheel 5 when machining each workpiece part will be explained with reference to Figures 6(a) to (c). As shown in Figures 6(a) to (c), when grinding the first to third workpieces 7, 8, and 9, the tips of the headstock center 22 and the tailstock center 32 are fitted into the center holes 7a and 7b formed at both ends of the first workpiece 7, the center holes 8a and 8b formed at both ends of the second workpiece 8, and the center holes 9a and 9b formed at both ends of the third workpiece 9. In this embodiment, the case in which grinding is performed by plunge grinding, in which the grinding wheel 5 is cut perpendicular to the rotation axis of the first to third workpieces 7, 8, and 9, will be explained, but if necessary, traverse grinding, in which the grinding wheel is moved parallel to the rotation axis of the workpiece, may be combined.

[0057] As described above, the grinding wheel position setting means 65 sets the position of the grinding wheel 5 during grinding so that the overlap width of the grinding wheel width W5 of the grinding wheel 5 used when grinding multiple workpieces in succession is minimized. For this reason, after first grinding the large diameter workpiece 71 of the first workpiece 7, when grinding the medium diameter workpiece 72 and small diameter workpiece 73 of the first workpiece 7, the position of the grinding wheel 5 during grinding is set so that the part used for grinding the medium diameter workpiece 72 and the part used for grinding the small diameter workpiece 73 do not overlap. Here, to prevent the grinding wheel 5 from interfering with the headstock 2, the right portion of the grinding wheel width W5 is used when grinding the small diameter workpiece 73, and the left portion of the grinding wheel width W5 is used when grinding the medium diameter workpiece 72. Furthermore, the medium-diameter workpiece portion 72 may be ground before the small-diameter workpiece portion 73, or the small-diameter workpiece portion 73 may be ground before the medium-diameter workpiece portion 72.

[0058] Following the first workpiece 7, in order to extend the life of the grinding wheel 5 by suppressing the number of truing cycles and the amount of material removed by truing while ensuring machining accuracy, the second workpiece 8 is ground after the medium-diameter workpiece portion 72 and small-diameter workpiece portion 73 of the first workpiece 7 without truing. Figure 6 shows, as an example, a case in which the large-diameter workpiece portion 81 of the second workpiece 8 is ground using the right portion of the grinding wheel width W5, and the small-diameter workpiece portion 82 of the second workpiece 8 is ground using the left portion of the grinding wheel width W5. Note that the large-diameter workpiece portion 81 and the small-diameter workpiece portion 82 may be ground first.

[0059] After grinding the second workpiece 8, and before grinding the third workpiece 9, the grinding wheel 5 is trued. For the third workpiece 9, the small-diameter workpiece 91, which is a high-precision workpiece, is ground before the large-diameter workpiece 92. As mentioned above, the width W of the small-diameter workpiece 91 91Since the grinding wheel is wider than the grinding wheel width W5 of the grinding wheel 5, plunge grinding is performed in two stages, as shown in Figure 6. Specifically, the entire width W5 of the grinding wheel is used to grind a portion of the small-diameter workpiece 91 in the first plunge grinding stage, and then the left side of the grinding wheel width W5 is used to grind the remaining portion of the small-diameter workpiece 91 in the second plunge grinding stage. After that, the right side of the grinding wheel width W5 is used to grind the large-diameter workpiece 92.

[0060] The various settings configured as described above are displayed on the screen of the display 600 of the grinding machine. setting This information is presented to the user of the support device 6. Based on the presented information, the user designs the process and creates a numerical control program to control the Z-axis motor 123 and X-axis motor 133 of the grinding machine 1. setting The burden on the user of the support device 6 is reduced, and process design becomes easier. setting Using the support device 6 to estimate the machining costs of a workpiece makes it possible to create estimates more accurately and easily.

[0061] (Note) The present invention has been described above based on embodiments, but these embodiments do not limit the invention as defined in the claims. It should also be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. Furthermore, the present invention can be implemented by modifying it as appropriate, without departing from its spirit, by omitting some components or adding or substituting components. Moreover, it is possible to combine some components of the above-described embodiments with each other, and it is also possible to modify it as follows, for example.

[0062] In the above embodiment, we described a case where it is determined that machining of all of the first to third workpieces 7, 8, and 9 is not possible if the difference between the length L7 of the first workpiece 7 and the length L8 of the second workpiece 8 is greater than the sum of the lengths of the movable ranges of the headstock center 22 and the tailstock center 32. However, if multiple headstocks and tailstocks with different lengths of movable ranges are available, the system may select and present to the user the one that can be used to machine multiple workpieces.

[0063] Furthermore, although the above embodiment was described using the example of continuously grinding the first to third workpieces 7, 8, and 9, the grinding machine is not limited to this, and can also be used when processing one, two, or four or more workpieces. setting Support device 6 can be used. In addition, although the above embodiment described the case in which a display 600 is used as a means of presenting information to the user, the means of presentation is not limited to this, and various types of information may be presented to the user by, for example, generating electronic files.

[0064] Furthermore, although the above embodiment describes a case where the headstock 2 and tailstock 3 are each equipped with moving mechanisms 27 and 36, it is not limited to this, and for example, the tailstock 3 may be equipped with a moving mechanism 36, while the headstock 2 is not equipped with a moving mechanism 27.

[0065] Furthermore, in the above embodiment, a headstock 2 and a tailstock 3 are provided as a pair of rotary support devices that support the workpiece at both ends, and the workpiece is rotated by the spindle motor 26 of the headstock 2, which is one of the rotary support devices. However, each of the pair of rotary support devices may also be equipped with a motor for rotating the workpiece. [Explanation of Symbols]

[0066] 1…Grinding machine 10…Workpiece 11... Bed 2... Headstock (rotating support device) 21...Headstock case (fixing member) 22...Headstock center (support member) 27...Moving mechanism 3...Tailstock (rotating support device) 31...Tailstock case (fixing member) 32...Tailstock center (support member) 36...Moving mechanism 4...Anti-vibration device 41...Anti-vibration device main body 42...Rest 42a...Support surface 5...Grinding wheel 5a… Grinding surface 6… Grinding machine setting support equipment 600...Display (presentation means) 61...Means for acquiring workpiece information 62...Position setting means 63...Support surface width setting means 64...Means for setting the processing sequence 65...Means for setting the grinding wheel position 66...Means for predicting processing results 7...First workpiece 71…Large diameter workpiece 72…Medium diameter workpiece 73…Small diameter workpiece 8…Second workpiece 81…Large diameter workpiece 82…Small diameter workpiece 9...Third workpiece 91...Small diameter workpiece 92...Large diameter workpiece W5...Grinding wheel width

Claims

1. A grinding machine setting support device that assists in setting up a grinding machine for grinding multiple workpieces that are supported and rotated by a pair of rotary support devices fixed to a bed, and which grinds these workpieces with a grinding wheel, The aforementioned workpieces differ in their axial length. At least one of the pair of rotary support devices includes a fixing member fixed to the bed, a support member that supports the ends of the plurality of workpieces, and a moving mechanism that can move the support member within a predetermined range of motion along the rotation axis direction of the plurality of workpieces relative to the fixing member. A means for acquiring workpiece information relating to the aforementioned plurality of workpieces, A position setting means for setting the fixing position of at least one of the pair of rotary support devices to the bed based on at least one of the position, shape, or diameter of the workpiece portion in the axial direction of each of the plurality of workpieces included in the workpiece information, A presentation means for presenting the fixed position set by the position setting means, Equipped with, The position setting means sets the fixing position of the fixing member so that grinding of the multiple workpieces can be performed without changing the fixing position of the fixing member to the bed. Grinding machine setting support device.

2. The position setting means, in setting the fixed position of the fixed member, takes into consideration the length of the movable range of the support member relative to the fixed member, the length of each of the plurality of workpieces, and the movable range of the grinding wheel relative to the bed in the direction of the rotation axis of the plurality of workpieces. The grinding machine setting support device according to claim 1.

3. The grinding machine is equipped with a vibration damping device having a vibration damping device body fixed to the bed and a rest that supports the plurality of workpieces and suppresses vibration of the plurality of workpieces during grinding. The position setting means sets the fixing position of the bracing device body to the bed based on the workpiece information, The presenting means presents the fixed position of the anti-vibration device body set by the position setting means. The grinding machine setting support device according to claim 1.

4. The aforementioned anti-vibration device is equipped with a support surface width setting means for setting the required width of the support surface of the rest of the device, The presenting means presents the required width set by the support surface width setting means. The grinding machine setting support device according to claim 3.

5. When grinding multiple workpieces of each of the multiple workpieces with the grinding wheel, the system is equipped with a processing order setting means for setting the processing order of the multiple workpieces. The processing sequence setting means sets the processing sequence based on the workpiece information so that, after shaping the grinding wheel, it prioritizes processing the workpiece parts that require high processing accuracy among the multiple workpiece parts. The presentation means presents the processing sequence set by the processing sequence setting means. A grinding machine setting support device according to any one of claims 1 to 4.

6. The system includes a grinding wheel position setting means for setting the position of the grinding wheel relative to the plurality of workpieces when grinding the plurality of workpieces, The grinding wheel position setting means sets the position of the grinding wheel such that the overlap width of the portion of the grinding wheel used when continuously grinding the multiple workpieces is reduced. The presenting means presents the position of the grinding wheel relative to the plurality of workpieces set by the grinding wheel position setting means. The grinding machine setting support device according to claim 5.

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