Bearing machining device

Abstract

To provide a bearing machining device that can achieve both weight reduction and sufficient rigidity.SOLUTION: A bearing machining device 1 includes: a first columnar portion 41; a second columnar portion 42; a third columnar portion 43, and a beam portion 10. The beam portion 10 includes: a pair of first ribs 14 extending from the lower wall 12 to the upper wall 13 of the beam portion 10 in a first region R1 overlapping with the first columnar portion 41 in the front-rear direction Z or the up-down direction Y and a second region R2 overlapping with the second columnar portion 42 in the front-rear direction Z or the up-down direction Y; and a second rib 15 extending from the lower wall 12 to the upper wall 13 in a third region R3 overlapping with the third columnar portion 43 in the front-rear direction Z. The thickness T1 of the first rib 14 is greater than the thickness T2 of the second rib 15.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a bearing machining device. [Background technology]

[0002] In recent years, the demand for wind power generation as a renewable energy source has been increasing. A wind power generation device is equipped with a bearing that rotatably supports a wind turbine, and in order to improve power generation efficiency, it is necessary to manufacture bearings with high shape accuracy and dimensional accuracy. For example, Patent Document 1 discloses a bearing processing device for manufacturing such bearings, which provides a predetermined shift amount to a target value when processing the raceway surfaces of the outer ring and the inner ring based on the measured values ​​of the raceway surfaces of the outer ring and the inner ring and the target value of the bearing internal gap between the outer ring and the inner ring, thereby achieving high processing accuracy. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-142446 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, in order to improve the efficiency and cost performance of wind power generation, there is a demand for larger wind turbines, and therefore the bearings that support the wind turbines are also required to be larger. In order to process large bearings, a correspondingly large bearing processing device is required. However, in order to enlarge the conventional bearing processing device disclosed in Patent Document 1, a design is adopted in which ribs of the same thickness are simply arranged evenly in the frame structure of the bearing processing device. However, if the device is enlarged with such a design, the weight becomes excessive, and deformation of the frame structure, etc. occurs due to its own weight, resulting in a problem of reduced processing accuracy. On the other hand, if the components are made smaller or the components are hollowed out too much in order to reduce weight, the rigidity of the bearing processing device may decrease, and the processing accuracy may decrease. Therefore, there is room for improvement in order to achieve both weight reduction and ensuring rigidity.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide a bearing machining device that can achieve both weight reduction and ensuring rigidity. [Means for solving the problem]

[0006] One aspect of the present invention is A bearing processing device for machining a workpiece to produce a bearing member, The first pillar portion erected, A second pillar portion erected at a position spaced apart from the first pillar portion; A beam portion bridged between the first column portion and the second column portion with a lower surface and a back surface connected to the first column portion and the second column portion, A third column section is erected at a position on the rear side of the beam section and is connected to the beam section at a position between the position connected to the first column section and the position connected to the second column section on the rear side of the beam section; A workpiece holder that is disposed below the beam portion and between the first column portion and the second column portion and holds the workpiece; a first tool unit that holds a first tool for machining the workpiece and is provided on a front surface of the beam portion so as to be movable from one end of the beam portion in a longitudinal direction to at least a central position in the longitudinal direction; a second tool unit that holds a second tool for machining the workpiece and is provided on the front surface of the beam portion so as to be movable from the other end in the longitudinal direction to at least a central position in the longitudinal direction; a tool replacement unit that is disposed near the other end of the beam portion and replaces the second tool; Equipped with The beam portion is A front wall constituting the front surface; A lower wall constituting the lower surface; An upper wall that constitutes an upper surface of the beam portion; A pair of first ribs extending from the lower wall to the upper wall in each of a first region overlapping the first pillar portion in the front-rear direction or the up-down direction and a second region overlapping the second pillar portion in the front-rear direction or the up-down direction; a second rib extending from the lower wall to the upper wall in a third region overlapping with the third pillar portion in the front-rear direction; Equipped with The thickness of the first rib is greater than the thickness of the second rib in the bearing machining device. Effect of the Invention

[0007] According to the above-mentioned aspect, the beam section is bridged by the first column section and the second column section that are arranged apart from each other, and the portion supported by the first column section and the second column section is supported by the third column section. In addition, a pair of first ribs provided in the first region of the beam section that overlaps with the first column section in the front-rear direction or the up-down direction and the second region that overlaps with the second column section in the front-rear direction or the up-down direction are thicker than the second rib provided in the third region that overlaps with the third column section in the front-rear direction. In this way, by providing a pair of thick first ribs in each of the first region supported by the first column section that is likely to receive weight and the second region supported by the second column section, it is easy to ensure the rigidity of the beam section while reducing the weight by making the ribs provided in other places thinner.

[0008] As described above, according to the above aspect, it is possible to provide a bearing machining device that can achieve both weight reduction and sufficient rigidity. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a rear perspective view of the bearing machining device and the workpiece in the first embodiment. [Diagram 2] FIG. 4 is a rear view of the beam portion and each column portion of the bearing machining device in the first embodiment. [Diagram 3] FIG. 2 is a side view of the bearing machining device and the workpiece in the first embodiment. [Figure 4] 1A is a front view of a bearing machining device and a workpiece in a first state, FIG. 1B is a front view of a bearing machining device and a workpiece in a second state, and FIG. 1C is a front view of a bearing machining device and a workpiece in a third state in the first embodiment. [Diagram 5] FIG. 13 is a front view of the bearing machining device and the workpiece in a fourth state, a front view of the bearing machining device and the workpiece in a fifth state, and a front view of the bearing machining device and the workpiece in a sixth state in the first embodiment. [Figure 6] 1A to 1D are top-side contour diagrams showing the topology optimized shape of a solid model of a beam section in embodiment 1; (b) a front-side contour diagram; (c) a front-side contour diagram under other conditions; and (d) a front-side contour diagram under further other conditions. [Figure 7] FIG. 13 is a rear view of the beam portion in the comparative example. [Figure 8] FIG. 2A is a conceptual diagram showing the simulation results of the first embodiment, and FIG. 2B is a conceptual diagram showing the simulation results of a comparative embodiment, in a simulation test. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (Embodiment 1) A first embodiment of the method for manufacturing a component part of the machine tool will be described with reference to Fig. 1 to Fig. 9. The first embodiment is a method for manufacturing a beam part 10 which is a component part of the bearing machining device 1 shown in Fig. 1.

[0011] 1. Work W The workpiece W to be machined by the bearing machining apparatus 1 is a bearing, and can be an inner ring or an outer ring. The size of the workpiece W constituting the bearing is not limited, but in this embodiment 1, it can have a mass of, for example, 20,000 to 30,000 kg. The bearing machining apparatus 1 is capable of machining the outer peripheral surface, inner peripheral surface, and top surface of the inner ring or outer ring as the workpiece W.

[0012] 2. Bearing processing equipment 1 1 and 2, the bearing machining device 1 includes a beam portion 10, a first tool unit 20, a second tool unit 30, a first column portion 41, a second column portion 42, a third column portion 43, a workpiece holding portion 50, and an automatic tool changer 60. The outer shape of the beam portion 10 is substantially rod-shaped. In this embodiment 1, the longitudinal direction of the beam portion 10 is the X direction, the vertical direction of the beam portion 10 which is the direction of gravity is the Y direction, the front-rear direction of the beam portion 10 which is a direction perpendicular to the X direction and the Y direction is the Z direction, the front in the front-rear direction Z is the Z1 direction, and the rear is the Z2 direction.

[0013] 2-1. First column portion 41 and second column portion 42 As shown in Figs. 1 and 2, the first columnar portion 41 and the second columnar portion 42 are erected at the installation location of the bearing machining device 1, and are arranged apart from each other in the X direction. As shown in Figs. 2 and 3, the first columnar portion 41 has a first rear surface abutment portion 411, a first lower surface abutment portion 412, and a first leg portion 413. As shown in Fig. 2, the first rear surface abutment portion 411 abuts against the rear surface of a first region R1 located near one end of the beam portion 10 in the longitudinal direction X, which will be described later. The first lower surface abutment portion 412 abuts against the lower surface of the first region R1 of the beam portion 10. The first leg portion 413 is located below the first rear surface abutment portion 411 and the first lower surface abutment portion 412, and as shown in Fig. 3, it spreads forward Z1 as it goes downward. As a result, the first column portion 41 supports the back surface and the bottom surface of the first region R1 of the beam portion 10 with an L-shaped surface formed by the first back surface abutment portion 411 and the first bottom surface abutment portion 412.

[0014] The second pillar 42 has a second rear abutment portion 421, a second lower abutment portion 422, and a second leg portion 423, similar to the first pillar portion 41. As shown in FIG. 2, the second rear abutment portion 421 abuts against the rear surface of the second region R2 at a position close to the other end of the beam portion 10 in the longitudinal direction X, which will be described later. The second lower abutment portion 422 abuts against the lower surface of the second region R2 of the beam portion 10. The second leg portion 423 is located below the second rear abutment portion 421 and the second lower abutment portion 422, and spreads forward Z1 as it goes downward. As a result, the second pillar portion 42 supports the rear surface and the lower surface of the second region R2 in the beam portion 10 with an L-shaped surface formed by the second rear abutment portion 421 and the second lower abutment portion 422.

[0015] 2-2. Third pillar section 43 The third pillar 43 has a third rear surface abutment portion 431 and a third leg portion 433. As shown in FIG. 2, the third rear surface abutment portion 431 abuts against the rear surface of a central region R3 including a central position in the longitudinal direction X of the beam portion 10 described later. The third leg portion 433 extends rearward of the third rear surface abutment portion 431 and is bent downward. As a result, a space in which a work holding portion 50 described later is located is formed below the third region R3 of the beam portion 10. As a result, the third pillar portion 43 supports the rear surface of the beam portion 10 in the third region R3 with the third rear surface abutment portion 431.

[0016] 3-1. Overview of the beam portion 10, the first tool unit 20 and the second tool unit 30 1 and 2, the beam portion 10 is substantially rod-shaped. As shown in FIG. 4(a), a first tool unit 20 is attached to the left front side of the beam portion 10 as a moving mechanism, and a second tool unit 30 is provided on the right front side. The first tool unit 20 and the second tool unit 30 are attached so as to be movable in the X direction via rails 21, 31 provided on the front side of the beam portion 10. The positions of the first tool unit 20 and the second tool unit 30 in the X direction are controlled by a control device (not shown).

[0017] Further, the first tool unit 20 holds a first tool for machining the workpiece W, and the second tool unit 30 holds a second tool for machining the workpiece W. The types of the first tool and the second tool are not limited, but in the first embodiment, a finishing grindstone is provided as the first tool, and a drill, an end mill, a cutting tool, a grindstone, or the like is provided as the second tool in an exchangeable manner.

[0018] The first tool unit 20 is configured to move, for example, from the initial position shown in Fig. 4(a) to a position above the workpiece W as shown in Fig. 4(b) and (c) to perform a predetermined machining on the workpiece W. The second tool unit 30 is configured to move, for example, from the initial position shown in Fig. 5(a) to a position above the workpiece W as shown in Fig. 5(b) and (c) to perform a predetermined machining on the workpiece W. Note that Fig. 4(a) and Fig. 5(a) show the same state in which both the first tool unit 20 and the second tool unit 30 are in their initial positions.

[0019] In the first embodiment, the first tool unit 20 and the second tool unit 30 are large, with the mass of the first tool unit 20 being approximately 15,000 kg, and the mass of the second tool unit 30 being approximately 20,000 kg. The beam portion 10 functions as a beam that supports the first tool unit 20 and the second tool unit 30 moving in the X direction. Therefore, when the first tool unit 20 and the second tool unit 30 move in the X direction, the position at which the load is applied to the beam portion 10 changes accordingly. Specifically, as shown in Figs. 4(a) to (c) and Figs. 5(a) to (c), the center of gravity Ga of the first tool unit 20 and the center of gravity Gb of the second tool unit 30 change according to their respective states.

[0020] 3-2. Work holding part 50 1, the workpiece holding part 50 holds a workpiece W. The workpiece holding part 50 is disposed at a position between the first pillar part 41 and the second pillar part 42 below the beam part 10. In the present embodiment 1, the workpiece holding part 50 is configured to be able to rotate the held workpiece W to a predetermined phase.

[0021] 3-3. Automatic tool changer 60 1, the automatic tool changer 60 is provided near the second tool unit 30. The automatic tool changer 60 is configured to automatically change the second tool held by the second tool unit 30 to another tool.

[0022] 4. Optimization of the structure of the beam section 10 The optimization process for the structure of the beam section 10 can be performed as follows. First, a solid model of the beam section 10 is set as the initial shape. In this initial shape, the front surface on which the first tool unit 20 and the second tool unit 30 are provided is not subject to optimization and is not changed. Then, a topology optimization process is performed on the initial shape. The minimization of the displacement and the minimization of the mass of the beam section 10 are set as the objective variables in the topology optimization process, and no constraint conditions are set.

[0023] Then, stress analysis is performed on the first state where the first tool unit 20 is in the initial position shown in Fig. 4(a), the second state where the first tool unit 20 has moved a predetermined distance to the right in the X direction from the initial position as shown in Fig. 4(b), and the third state where the first tool unit 20 has moved further to the right in the X direction to the terminal position as shown in Fig. 4(c). Furthermore, stress analysis is performed on the fourth state where the second tool unit 30 is in the initial position shown in Fig. 5(a), the fifth state where the second tool unit 30 has moved a predetermined distance to the left in the X direction from the initial position as shown in Fig. 5(b), and the sixth state where the second tool unit 30 has moved further to the left in the X direction to the terminal position as shown in Fig. 5(c). Then, a topology optimization process is performed based on the stress analysis results, and the optimized shapes shown in Figs. 6(a) to 6(d) are output.

[0024] The optimized shapes shown in Figures 6(a) to (d) are shapes in which multiple ribs are provided in high stress regions, which are regions where stress generated inside the beam section 10 is relatively high, and no ribs are provided in low stress regions, which are regions where stress generated inside the beam section 10 is relatively low. The processing conditions when the optimized shapes shown in Figures 6(c) and (d) were output were set to a value larger than the mass of the beam section 10 as a target value, and the processing conditions when the optimized shapes shown in Figures 6(a) and (b) were output were set to a value larger than the mass of the beam section 10 as a target value, thereby making the position where the ribs are provided inside the beam section 10 clearer. Based on the optimized shapes shown in Figures 6(a) to (d), the shapes of the beam section 10 shown in Figures 2 and 3 were determined.

[0025] 4-1.Details of the structure of the beam section 10 The beam portion 10 comprises a front wall 11 constituting the front surface as shown in Fig. 3, a lower wall 12 constituting the lower surface as shown in Fig. 2, and an upper wall 13 constituting the upper surface. As shown in Fig. 2, the beam portion 10 comprises a first rib 14, a second rib 15, a region end rib 16, and an inclined rib 17. In this embodiment 1, no ribs other than the first rib 14, the second rib 15, the region end rib 16, and the inclined rib 17 are provided on the inside of the beam portion 10.

[0026] As shown in FIG. 2, the pair of first ribs 14 extend from the lower wall 12 to the upper wall 13 in a first region R1 overlapping the first pillar portion 41 in the front-rear direction Z or the up-down direction Y, and in a second region R2 overlapping the second pillar portion 42 in the front-rear direction Z. The first region R1 can be referred to as a range in the longitudinal direction X of the beam member 10 where the first rear surface abutment portion 411 of the first pillar portion 41 abuts against the beam member 10, or a range in the longitudinal direction X of the beam member 10 where the first lower surface abutment portion 412 of the first pillar portion 41 abuts against the beam member 10. Similarly, the second region R2 can be referred to as a range in the longitudinal direction X of the beam member 10 where the second rear surface abutment portion 421 of the second pillar portion 42 abuts against the beam member 10, or a range in the longitudinal direction X of the beam member 10 where the second lower surface abutment portion 422 of the second pillar portion 42 abuts against the beam member 10. In the first embodiment, the first rib 14 includes a first rib 141 provided in the first region R1 and a first rib 142 provided in the second region R2.

[0027] The second rib 15 extends from the lower wall 12 to the upper wall 13 in a third region R3 overlapping with the third column portion 43 in the front-rear direction Z. In the first embodiment, the second rib 15 includes a second rib 151 located at an end on the first region R1 side and a second rib 152 located at an end on the second region R2 side, of both ends of the third region R3 in the X direction. The thickness T1 of the first ribs 14 (141, 142) is thicker than the thickness T2 of the second ribs 15 (151, 152).

[0028] The region end ribs 16 extend from the lower wall 12 to the upper wall 13 at both end positions of the first region R1 and at both end positions of the second region R in the longitudinal direction X. In this embodiment 1, the region end ribs 16 include a region end rib 161 closer to the third region R3 and a region end rib 162 farther from the both end positions in the first region R1 and the second region R2. In this embodiment 1, the thickness T3 of the region end ribs 16 (161, 162) is smaller than the thickness T1 of the first ribs 14 (141, 142).

[0029] Among the region end ribs 16 in the first region R1, the region end rib 161 on the side closer to the third region R3 is located closer to the first rib 141 in the first region R1 than the center position C1 between the first rib 141 in the first region R1 and the second rib 151 on the first region R1 side. Similarly, among the region end ribs 16 in the second region R2, the region end rib 161 on the side closer to the third region R3 is located closer to the first rib 142 in the second region R2 than the center position C2 between the first rib 142 in the second region R2 and the second rib 152 on the second region R2 side.

[0030] Among the region end ribs 16 in the first region R1 and the second region R2, the region end rib 162 on the side farther from the third region R3 is located inside (i.e., on the third region R3 side) than both ends in the longitudinal direction X on the front surface of the beam section 10. In the rear Z2 region of the beam section 10, the region end rib 162 forms an outer wall in the longitudinal direction X, and at both ends of the beam section 10 in the longitudinal direction X, step sections 18 are formed by recessing the rear region.

[0031] In the present embodiment 1, the first rib 141 provided in the first region R1 and the region end ribs 161, 162 provided in the first region R1 directly face each other. That is, in the first region R1, no rib is provided between the first rib 141 and the region end rib 161, and no rib is provided between the first rib 141 and the region end rib 162.

[0032] The first rib 14, the second rib 15, the area end rib 16 and the inclined rib 17 are all connected to the inner surface of the front wall 11 of the beam section 10. The first rib 14, the second rib 15 and the area end rib 16 are provided with screws (not shown) for connecting the beam section 10 to the first pillar section 41, the second pillar section 42 and the third pillar section 43.

[0033] Similarly, the first rib 142 provided in the second region R2 and the region end ribs 161, 162 provided in the second region R2 directly face each other. That is, in the second region R2 as well, no rib is provided between the first rib 141 and the region end rib 161, and no rib is provided between the first rib 141 and the region end rib 162.

[0034] The inclined rib 17 extends from the lower wall 12 to the upper wall 13 between the first rib 14 and the second rib 15, and is inclined so as to approach the second rib 15 as it approaches the upper wall 13 from the lower wall 12. The upper wall 13 is provided with an upper wall thick portion 131 which extends from the connection position between the upper wall 13 and the second rib toward the connection position between the upper wall 13 and the first rib and is formed to be thick. In the first embodiment, the upper wall thick portion 131 extends to the connection position between the upper wall 13 and the inclined rib 17.

[0035] 5. Confirmation Test A simulation test was conducted to compare the amount of displacement between the beam portion 10 of the first embodiment having the optimized shape shown in Fig. 2 and the beam portion 90 of the comparative embodiment shown in Fig. 7. Note that the beam portion 90 of the comparative embodiment has ribs 91 provided therein at a constant rate in a predetermined repeating unit as shown in Fig. 7.

[0036] It was shown that the maximum deformation amount P1 due to the movement of the first tool unit 20 and the maximum deformation amount Q1 due to the movement of the second tool unit 30 in the beam portion 10 of this embodiment shown in Figure 8 (a) are both smaller than the maximum deformation amount P2 due to the movement of the first tool unit 20 and the maximum deformation amount Q2 due to the movement of the second tool unit 30 in the beam portion 90 of the comparative embodiment shown in Figure 8 (b). It was also shown that the displacement amount per unit movement distance in the movement of the first tool unit 20 and the second tool unit 30 in the beam portion 10 of this embodiment shown in Figure 8 (a) is smaller than that in the case of the beam portion 90 of the comparative embodiment shown in Figure 8 (b). The weight of the beam portion 10 of the first embodiment is set to be equal to or less than the weight of the beam portion 90 of the comparative embodiment.

[0037] 6. Effects According to the bearing machining device 1 of the first embodiment, the beam portion 10 is bridged by the first column portion 41 and the second column portion 42 arranged at a distance from each other, and the portion supported by the first column portion 41 and the second column portion 42 is supported by the third column portion 43. In addition, a pair of first ribs 14 provided in the first region R1 overlapping the first column portion 41 in the front-rear direction Z or the up-down direction Y and the second region R2 overlapping the second column portion 42 in the front-rear direction Z or the up-down direction Y in the beam portion 10 are thicker than the second rib 15 provided in the third region R3 overlapping the third column portion 43 in the front-rear direction Z. In this way, by providing a pair of thick first ribs 14 in each of the first region R supported by the first column portion 41 and the second region R2 supported by the second column portion 42, which are likely to bear weight, it is easy to ensure the rigidity of the beam portion 10 while reducing the weight by making the ribs provided in other places thinner.

[0038] Moreover, in the first embodiment, the beam section 10 includes an inclined rib 17 between the first rib 14 and the second rib 15, which extends from the lower wall 12 to the upper wall 13 and is inclined so as to approach the second rib 15 as it approaches the upper wall 13 from the lower wall 12. This makes it possible to arrange the ribs in positions in accordance with the topology optimized shape of the beam section 10, thereby enabling the beam section 10 to be further lightened while maintaining its rigidity.

[0039] In the first embodiment, the beam section 10 includes a thick upper wall section 131 in the upper wall 13, which extends from the connection position between the upper wall 13 and the second rib 15 toward the connection position between the upper wall 13 and the first rib 14. This allows the shape of the beam section 10 to be closer to the topology optimized shape, and the beam section 10 can be made even lighter while maintaining its rigidity.

[0040] In the first embodiment, the beam section 10 includes an upper wall thick section 131 formed by thickening the area of ​​the upper wall 13 from the connection position between the upper wall 13 and the second rib 15 to the connection position between the upper wall 13 and the inclined rib 17. This allows the shape of the beam section 10 to be more in line with the topology optimized shape, and the beam section 10 can be made even lighter while maintaining its rigidity.

[0041] In the first embodiment, the beam portion 10 includes region end ribs 16 extending from the lower wall 12 to the upper wall 13 at both ends of the first region R1 in the longitudinal direction X and at both ends of the second region R2 in the longitudinal direction X. This makes it possible to increase the rigidity of the positions overlapping the first region R supported by the first pillar portion 41 and the second region R2 supported by the second pillar portion 42, which are likely to bear weight, and improve the rigidity of the beam portion 10.

[0042] In the first embodiment, the first rib 141 provided in the first region R1 and the region end ribs 161, 162 provided in the first region R1 directly face each other, and the first rib 142 provided in the second region R2 and the region end ribs 161, 162 provided in the second region R2 directly face each other. This allows the number of ribs to be reduced while maintaining the rigidity of the beam section 10, thereby further reducing the weight.

[0043] In the first embodiment, the region end rib 161 at the end position close to the third region R3 in the longitudinal direction X among the two end positions of the first region R1 is located closer to the first rib 141 of the first region R1 than the center position C1 between the first rib 141 of the first region R1 and the second rib 151 closest to the first region R1. Furthermore, the region end rib 161 at the end position close to the third region R3 in the longitudinal direction X among the two end positions of the second region R2 is located closer to the first rib 142 of the second region R2 than the center position C2 between the first rib 142 of the second region R2 and the second rib 152 closest to the second region R2. This makes it possible to increase the rigidity of the position close to the overlapping position of the first region R and the second region R2 where weight is likely to be applied, and improve the rigidity of the beam section 10.

[0044] The present invention is not limited to the above-described embodiments, and can be applied to various embodiments without departing from the gist of the present invention. [Explanation of symbols]

[0045] 1 Bearing processing equipment 10 Beam section 131 Upper wall thick section 14, 141, 142 First Rib 15, 151, 152 2nd Rib 16, 161, 162 Area end ribs 17 Inclined Rib 18 Step 20 1st Tool Unit 30 2nd Tool Unit 41 1st pillar section 42 Second pillar section 43 Third pillar section 50 Work holding part 60 Automatic tool changer

Claims

1. A bearing processing device for machining a workpiece to produce a bearing member, A first pillar portion erected; A second pillar portion erected at a position spaced apart from the first pillar portion; A beam portion bridged between the first column portion and the second column portion with a lower surface and a back surface connected to the first column portion and the second column portion; A third column section is erected at a position on the rear side of the beam section and is connected to the beam section at a position between the position connected to the first column section and the position connected to the second column section on the rear side of the beam section; A workpiece holder that is disposed below the beam portion and between the first column portion and the second column portion and holds the workpiece; a first tool unit that holds a first tool for machining the workpiece and is provided on a front surface of the beam portion so as to be movable from one end of the beam portion in a longitudinal direction to at least a central position in the longitudinal direction; a second tool unit that holds a second tool for machining the workpiece and is provided on the front surface of the beam portion so as to be movable from the other end in the longitudinal direction to at least a central position in the longitudinal direction; a tool replacement unit that is disposed near the other end of the beam portion and replaces the second tool; Equipped with The beam portion is A front wall constituting the front surface; A lower wall constituting the lower surface; An upper wall that constitutes an upper surface of the beam portion; A pair of first ribs extending from the lower wall to the upper wall in each of a first region overlapping the first pillar portion in the front-rear direction or the up-down direction and a second region overlapping the second pillar portion in the front-rear direction or the up-down direction; a second rib extending from the lower wall to the upper wall in a third region overlapping with the third pillar portion in the front-rear direction; Equipped with A bearing processing apparatus, wherein the thickness of the first rib is greater than the thickness of the second rib.

2. 2. The bearing processing device according to claim 1, wherein the beam portion is provided with an inclined rib extending from the lower wall to the upper wall between the first rib and the second rib and inclined so as to approach the second rib as it approaches the upper wall from the lower wall.

3. The bearing processing device according to claim 1 or 2, wherein the beam portion includes an upper wall thick-wall portion that extends from a connection position between the upper wall and the second rib toward a connection position between the upper wall and the first rib and is formed to be thick on the upper wall.

4. The bearing processing device according to claim 2, wherein the beam portion has an upper wall thick portion in which the area from the connection position between the upper wall and the second rib to the connection position between the upper wall and the inclined rib is formed thick.

5. The bearing processing apparatus according to claim 1 or 2, wherein the beam portion has region end ribs extending from the lower wall to the upper wall at both ends of the first region in the longitudinal direction and at both ends of the second region in the longitudinal direction.

6. 6. The bearing processing apparatus according to claim 5, wherein the first rib provided in the first region and the region end rib provided in the first region are directly opposed to each other, and the first rib provided in the second region and the region end rib provided in the second region are directly opposed to each other.

7. the region end rib at the end position close to the third region in the longitudinal direction among both end positions of the first region is located at a position closer to the first rib of the first region than a central position between the first rib of the first region and the second rib closest to the first region, 6. The bearing processing apparatus according to claim 5, wherein, among both end positions of the second region, the region end rib located at the end position closest to the third region in the longitudinal direction is located at a position closer to the first rib of the second region than a central position between the first rib of the second region and the second rib closest to the second region.

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