A bearing ring cold rolling device

Abstract

The application discloses a bearing ring cold rolling equipment and belongs to the technical field of bearing ring machining, which comprises a machine tool, a positioning shaft, a rolling wheel structure, a core roller structure, a supporting wheel structure and a transmission structure. The transmission structure comprises a first sliding plate, a second sliding plate and a chain sprocket, the chain sprocket is installed on the second sliding plate, a chain is wound on the chain sprocket, and the first sliding plate is connected with the chain. The rolling wheel structure and the positioning shaft are arranged at intervals along the length direction of the machine tool, the core roller structure is located between the positioning shaft and the rolling wheel structure, the supporting wheel structure is located below the core roller structure, the rolling wheel structure is connected with the first sliding plate, and the supporting wheel structure is connected with the second sliding plate. The bearing ring cold rolling equipment can make the moving distance of the first sliding plate twice that of the second sliding plate through the cooperation of the chain sprocket, so that the supporting wheel structure can be located directly below the center of the bearing ring at any time as the diameter of the bearing ring increases.

Description

Technical Field

[0001] This invention relates to the field of bearing ring processing technology, and more specifically, to a bearing ring cold rolling equipment. Background Technology

[0002] Cold rolling is a cold forming method that uses extrusion to plastically deform ring-shaped parts at room temperature to obtain finished products. The working principle of cold rolling involves a main-driven forming roller to shape the outer surface, and a driven forming mandrel to shape the inner surface. The mandrel and workpiece are supported by support rollers. During rolling, the roller drives the workpiece to rotate, and the mandrel, pushed by the support rollers fixed to the feeding device, compresses the workpiece, thus achieving the rolling process.

[0003] The working principle of cold rolling of bearing rings is that a main driven forming roller forms the outer surface shape, and a driven forming mandrel forms the inner surface shape. The mandrel, positioning roller and workpiece are supported by support roller. When rolling the workpiece, the roller drives the workpiece to rotate, and the mandrel squeezes the workpiece, thereby realizing the rolling of the workpiece.

[0004] In existing cold rolling processes, as the bearing ring expands, the support wheel at the bottom of the bearing ring cannot move to the appropriate position according to the increase in the diameter of the bearing ring. This results in the support wheel being unable to continue to provide stable support for the bearing ring, which causes the bearing ring to wobble or shift, thus increasing the scrap rate. Summary of the Invention

[0005] This invention discloses a cold rolling device for bearing rings to improve the above-mentioned problems.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] To achieve the above objectives, the present invention discloses a bearing ring cold rolling device, comprising:

[0008] machine tool;

[0009] A positioning axis, which is mounted on the machine tool;

[0010] A rolling mill structure is slidably fitted with the machine tool, and the rolling mill structure and the positioning axis are spaced apart along the length direction of the machine tool. The rolling mill structure is movable relative to the machine tool along the length direction of the machine tool.

[0011] A core roller structure is located between the positioning shaft and the rolling wheel structure, and the core roller structure is slidably engaged with the machine tool. The core roller structure is movable relative to the machine tool along the length direction of the machine tool.

[0012] A support wheel structure is located between the positioning shaft and the roller structure, and the support wheel structure is located below the positioning shaft; and

[0013] A transmission structure comprises a first sliding plate, a second sliding plate, a chain and two chain wheels, the first sliding plate and the second sliding plate are both in sliding connection with the machine tool, the roller structure is connected with the first sliding plate, the support wheel structure is connected with the second sliding plate, the two chain wheels are both installed on the second sliding plate, the chain is wound between the two chain wheels, and the bottom of the chain is engaged with the machine tool, and the first sliding plate is connected with the chain.

[0014] Optionally, the core roller structure comprises a core roller body and a core roller mounting seat, the core roller body is in rotational connection with the core roller mounting seat, the core roller mounting seat can move relative to the machine tool along the length direction of the machine tool, and the core roller mounting seat can move relative to the machine tool along the width direction of the machine tool;

[0015] The support wheel structure comprises a support wheel body, a support wheel mounting shaft and a support wheel mounting seat, the support wheel body is in rotational connection with the support wheel mounting shaft, the support wheel mounting shaft is in sliding fit with the support wheel mounting seat, the support wheel mounting seat is in sliding fit with the machine tool, and when the core roller mounting seat moves away from between the roller structure and the positioning shaft along the width direction of the machine tool, the core roller mounting seat can push the support wheel mounting seat to move together.

[0016] Optionally, the second sliding plate is provided with a first sliding groove, the first sliding groove is arranged along the height direction of the second sliding plate, and the first sliding groove penetrates through the second sliding plate along the thickness direction of the second sliding plate, and the support wheel mounting shaft is in sliding fit with the first sliding groove;

[0017] The support wheel mounting seat is provided with a second sliding groove, the support wheel mounting shaft is in sliding fit with the first sliding groove, the second sliding groove is arranged obliquely, one end of the second sliding groove close to the roller structure is lower, and the second sliding groove and the first sliding groove always overlap with each other in the width direction of the machine tool, so that the support wheel mounting shaft can move along the second sliding groove when the second sliding plate moves along the length direction of the machine tool.

[0018] Optionally, the support wheel structure further comprises a first sliding block, a second sliding block and a first elastic member, the first sliding block is located in the second sliding groove and is in sliding fit with the support wheel mounting seat, the second sliding block is in sliding fit with the support wheel mounting seat, and the first sliding block and the second sliding block abut against each other, when the support wheel mounting shaft moves along the second sliding groove towards the roller structure, the support wheel mounting shaft pushes the first sliding block to extrude the second sliding block, and the second sliding block extends out of the support wheel mounting seat along the height direction of the support wheel mounting seat, and the two ends of the first elastic member are connected with the support wheel mounting seat and the second sliding block respectively, and the first elastic member enables the second sliding block to have a tendency to return to the support wheel mounting seat.

[0019] Optionally, a protrusion is arranged on the first sliding block, the protrusion is located in the second sliding groove, and the thickness of the protrusion gradually increases in the direction towards the roller structure, so that the support wheel mounting shaft can push the first sliding block to move along the width direction of the support wheel mounting seat when moving along the second sliding groove.

[0020] Optionally, the first sliding block is located in the second sliding groove, the first sliding block can move relative to the support wheel mounting seat along the width direction of the machine tool, and the second sliding block can move relative to the support wheel mounting seat along the height direction of the machine tool.

[0021] Optionally, the support wheel structure further comprises a second elastic member, the two ends of the second elastic member are connected with the support wheel mounting seat and the machine tool respectively, and the second elastic member enables the support wheel mounting seat to have a tendency to return to below the roller structure along the width direction of the machine tool.

[0022] The top of the second sliding block is provided with an inclined surface, the inclined surface is in abutment fit with the core roller mounting seat, and the thickness of the second sliding block gradually decreases in the direction upwards along the height direction of the machine tool, so that when the second sliding block moves downwards along the height direction of the machine tool, the support wheel mounting seat can move the roller structure below along the width direction of the machine tool.

[0023] Optionally, the machine tool is provided with a third sliding groove, a fourth sliding groove and a fifth sliding groove, the third sliding groove and the fourth sliding groove are arranged in parallel, the third sliding groove is arranged along the length direction of the machine tool, the fifth sliding groove is arranged along the width direction of the machine tool, and the fifth sliding groove communicates with one end of the fourth sliding groove away from the third sliding groove, the roller structure is in sliding fit with the third sliding groove, and the core roller structure is in sliding fit with the fourth sliding groove.

[0024] Optionally, the length of the fourth sliding groove is greater than the length of the third sliding groove.

[0025] Optionally, the machine tool comprises a first work platform and a second work platform, the first work platform and the second work platform are arranged in a height direction of the machine tool, the first work platform is located above the second work platform, the third sliding groove and the fourth sliding groove are arranged on the first work platform, and the positioning shaft is also arranged on the first work platform.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The bearing ring cold rolling equipment disclosed by the present application can make the moving distance of the first sliding plate twice that of the second sliding plate through the cooperation of the chain and the sprocket, and the first sliding plate and the second sliding plate can drive the rolling structure and the supporting wheel structure to move respectively, so that the supporting wheel structure can be located directly below the center of the bearing ring at any time as the diameter of the bearing ring increases. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A schematic diagram of the bearing ring cold rolling equipment disclosed by the embodiment of the present application is shown;

[0029] Figure 2 A schematic diagram of the machine tool disclosed by the embodiment of the present application is shown;

[0030] Figure 3 An assembly schematic diagram of the positioning shaft, the rolling structure, the core roller structure and the supporting wheel structure disclosed by the embodiment of the present application is shown;

[0031] Figure 4 An installation schematic diagram of the positioning shaft, the rolling structure, the core roller structure and the supporting wheel structure and the bearing ring disclosed by the embodiment of the present application is shown;

[0032] Figure 5 A cross-sectional cooperation schematic diagram of the core roller structure and the supporting wheel structure disclosed by the embodiment of the present application is shown;

[0033] Figure 6 A cross-sectional view of the supporting wheel structure disclosed by the embodiment of the present application is shown;

[0034] Figure 7 A schematic diagram of the transmission structure disclosed by the embodiment of the present application is shown.

[0035] In the drawings:

[0036] 100-machine tool, 110-first work platform, 111-third sliding slot, 112-fourth sliding slot, 113-fifth sliding slot, 120-second work platform, 200-positioning shaft, 300-roller structure, 310-roller mounting seat, 320-roller body, 400-core roller structure, 410-core roller mounting seat, 420-core roller body, 500-supporting wheel structure, 510-supporting wheel mounting seat, 511-second sliding slot, 520-supporting wheel body, 530-supporting wheel mounting shaft, 540-first sliding block, 550-second sliding block, 551-inclined surface, 600-transmission structure, 610-first sliding plate, 620-second sliding plate, 621-first sliding slot, 630-sprocket, 640-chain, 700-bearing ring. DETAILED DESCRIPTION

[0037] The application will be further described in detail below with specific examples and in conjunction with the drawings.

[0038] Embodiment:

[0039] Referring to Figures 1 to 4 The embodiment of the application discloses a bearing ring cold rolling equipment, which comprises a machine tool 100, a positioning shaft 200, a roller structure 300, a core roller structure 400, a supporting wheel structure 500 and a transmission structure 600. The transmission structure 600 comprises a first sliding plate 610, a second sliding plate 620 and a chain 640 sprocket 630, the sprocket 630 is installed on the second sliding plate 620, the chain 640 is wound on the sprocket 630, and the first sliding plate 610 is connected with the chain 640 through a clamping part, so that the first sliding plate 610 can move faster. The positioning shaft 200 is installed on the machine tool 100, the roller structure 300 and the positioning shaft 200 are arranged at intervals along the length direction of the machine tool 100, the roller structure 300 is connected with the first sliding plate 610, the core roller structure 400 is located between the positioning shaft 200 and the roller structure 300, the supporting wheel structure 500 is located between the positioning shaft 200 and the roller structure 300, the supporting wheel structure 500 is located below the positioning shaft 200, and the supporting wheel structure 500 is connected with the second sliding plate 620.

[0040] The bearing ring cold rolling equipment disclosed by the embodiment can make the moving distance of the first sliding plate 610 twice that of the second sliding plate 620 through the cooperation of the chain 640 sprocket 630, and the roller structure 300 and the supporting wheel structure 500 can be driven to move by the first sliding plate 610 and the second sliding plate 620 respectively, so that the supporting wheel structure 500 can be located directly below the center of the bearing ring 700 at any time as the diameter of the bearing ring 700 increases.

[0041] Referring to Figure 1 and Figure 2The machine tool 100 comprises a first work platform 110 and a second work platform 120. The first work platform 110 and the second work platform 120 are arranged in a height direction of the machine tool 100, and the first work platform 110 is arranged above the second work platform 120.

[0042] The first work platform 110 is provided with a third sliding groove 111, a fourth sliding groove 112 and a fifth sliding groove 113. The third sliding groove 111 and the fourth sliding groove 112 are arranged in parallel, and the third sliding groove 111 is arranged in a length direction of the machine tool 100. The fifth sliding groove 113 is arranged in a width direction of the machine tool 100, and the fifth sliding groove 113 is communicated with one end of the fourth sliding groove 112 away from the third sliding groove 111 to form an inverted "L" shape.

[0043] The positioning shaft 200 is arranged on the first work platform 110, and the positioning shaft 200 is rotationally connected with the machine tool 100. An axis of the positioning shaft 200 is arranged in the width direction of the machine tool 100, and the positioning shaft 200 is arranged on one side of the fourth sliding groove 112 away from the third sliding groove 111.

[0044] Referring to Figure 3 The roller structure 300 comprises a roller mounting base 310 and a roller body 320. The roller body 320 is rotationally connected with the roller mounting base 310. A rotation axis of the roller body 320 is parallel to a rotation axis of the positioning shaft 200, and the roller body 320 is arranged on the same straight line with the positioning shaft 200. When the bearing ring 700 is arranged between the roller body 320 and the positioning shaft 200, the roller body 320 and the positioning shaft 200 can clamp the bearing ring 700. The roller mounting base 310 is arranged in the third sliding groove 111, and the roller mounting base 310 is slidingly matched with the third sliding groove 111, so that the roller mounting base 310 can drive the roller body 320 to move in the length direction of the machine tool 100.

[0045] The core roller structure 400 comprises a core roller mounting base 410 and a core roller body 420. The core roller body 420 is rotationally connected with the core roller mounting base 410, and a rotation axis of the core roller body 420 is parallel to a rotation axis of the roller body 320. The core roller mounting base 410 is arranged in the fourth sliding groove 112, and the core roller mounting base 410 is slidingly matched with the fourth sliding groove 112 and the fifth sliding groove 113. When the core roller body 420 and the roller body 320 are both moved to the left in the length direction of the machine tool 100, the bearing ring 700 can be cold-rolled and expanded. When the core roller body 420 is moved along the fifth sliding groove 113, the bearing ring 700 can be taken out or placed.

[0046] Wherein, since the diameter of the bearing ring 700 increases, the thickness thereof decreases accordingly, thus the length of the fourth sliding groove 112 can be made longer than that of the third sliding groove 111, so as to ensure that the moving distance of the core roller body 420 is longer than that of the roller body 320, thereby ensuring that the core roller body 420 is always in abutment with the inner wall of the bearing ring 700.

[0047] The support wheel structure 500 comprises a support wheel body 520, a support wheel mounting shaft 530 and a support wheel mounting seat 510. The support wheel body 520 is rotationally connected with the support wheel mounting shaft 530, and the rotation axis of the support wheel body 520 is parallel to the rotation axis of the roller body 320. The support wheel mounting shaft 530 is slidingly fitted with the support wheel mounting seat 510, and the support wheel mounting shaft 530 can move back and forth along the direction from the upper right corner to the lower left corner of the support wheel mounting seat 510. The support wheel mounting seat 510 is slidingly fitted with the second working platform 120, and the support wheel mounting seat 510 can move relative to the second working platform 120 along the width direction of the machine tool 100.

[0048] Referring to FIGS. 3 and Figure 4 When the core roller body 420 and the roller body 320 are both moved to the left, the support wheel body 520 moves from the upper right corner of the support wheel mounting seat 510 towards the lower left corner of the support wheel mounting seat 510, so as to ensure that the support wheel body 520 is always located directly below the center of the bearing ring 700. After the machining of the bearing ring 700 is completed, the core roller body 420 is first moved back along the fourth sliding groove 112 to the joint of the fourth sliding groove 112 and the fifth sliding groove 113, and then the core roller body 420 is moved along the fifth sliding groove 113. In this process, the core roller mounting seat 410 moves together with the support wheel mounting seat 510, so as to separate the core roller body 420 and the support wheel body 520 from the bearing ring 700, and the machined bearing ring 700 can be removed at this time. Then, the roller body 320 and the support wheel body 520 are reset, and the installation of the next bearing ring 700 can be performed, and then the core roller body 420 is returned to the position between the roller body 320 and the positioning shaft 200, so that the machining can be started.

[0049] In order to ensure that the support wheel body 520 can be accurately moved to the center of the bearing ring 700, the roller mounting seat 310 and the support wheel mounting seat 510 can be connected together by the transmission structure 600, so that the roller mounting seat 310 and the support wheel mounting seat 510 can be moved synchronously, thereby ensuring that the support wheel body 520 can be accurately moved to the center of the bearing ring 700.

[0050] Specifically, referring to FIGS. 3 and Figure 7The transmission structure 600 comprises a first sliding plate 610, a second sliding plate 620, a chain 640 and two chain wheels 630. The first sliding plate 610 and the second sliding plate 620 are both in sliding connection with the second work platform 120, and the first sliding plate 610 and the second sliding plate 620 can move relative to the second work platform 120 along the length direction of the machine tool 100. The two chain wheels 630 are both mounted on the second sliding plate 620, the chain 640 is wound between the two chain wheels 630, and the bottom of the chain 640 is in engagement with the machine tool 100. The first sliding plate 610 is connected with the chain 640, the roller structure 300 is connected with the first sliding plate 610, and the supporting wheel structure 500 is connected with the second sliding plate 620.

[0051] When the diameter of the bearing ring 700 is increased, since the position of the positioning shaft 200 is fixed, the roller body 320 needs to move a distance of two units for each unit of the diameter of the bearing ring 700, but at this time, the supporting wheel body 520 only needs to move a distance of one unit. The existing way is to use a separate control mode, that is, the roller mounting seat 310 and the supporting wheel mounting seat 510 are controlled respectively, but this control mode is easy to appear out of sync, which leads to the situation that the supporting wheel body 520 cannot move to the position directly below the bearing ring 700 in time, at this time, the machining precision of the bearing ring 700 is obviously reduced.

[0052] The transmission structure 600 disclosed in the embodiment uses the first sliding plate 610 and the second sliding plate 620 to drive the roller mounting seat 310 and the supporting wheel body 520 respectively. Since the first sliding plate 610 is directly connected with the chain 640, when the second sliding plate 620 moves a distance of one unit, the first sliding plate 610 can move a distance of two units, so as to ensure that the supporting wheel body 520 can always be located directly below the bearing ring 700 as the diameter of the bearing ring 700 is increased, thereby improving the machining precision and reducing the scrap rate.

[0053] Referring to Figure 6 and Figure 7A first sliding groove 621 is arranged on the second sliding plate 620, the first sliding groove 621 is arranged along the height direction of the second sliding plate 620, and the first sliding groove 621 penetrates the second sliding plate 620 along the thickness direction of the second sliding plate 620. An inclined second sliding groove 511 is arranged on the support wheel mounting seat 510, the second sliding groove 511 extends from the upper right corner of the support wheel mounting seat 510 to the lower left corner of the support wheel mounting seat 510, that is, the end of the second sliding groove 511 close to the roller structure 300 is lower. One end of the support wheel mounting shaft 530 is in sliding fit with the second sliding groove 511, and the other end of the support wheel mounting shaft 530 extends into the first sliding groove 621, and the support wheel mounting shaft 530 is in sliding fit with the first sliding groove 621 and the second sliding groove 511. As the second sliding plate 620 moves along the length direction of the machine tool 100, the second sliding groove 511 and the first sliding groove 621 always coincide with each other in a position in the width direction of the machine tool 100, so that the support wheel mounting shaft 530 can move along the second sliding groove 511 when the second sliding plate 620 moves along the length direction of the machine tool 100. Since the support wheel body 520 needs to move downward when it moves leftward with the increase of the diameter of the bearing ring 700, the second sliding groove 511 can be arranged at an angle of 45 degrees with the horizontal direction.

[0054] Referring to Figure 3 , Figure 5 and Figure 6 , the support wheel structure 500 further comprises a first sliding block 540, a second sliding block 550, a first elastic member (not shown in the figure) and a second elastic member (not shown in the figure).

[0055] The first sliding block 540 is in sliding fit with the support wheel mounting seat 510, and the first sliding block 540 can move relative to the support wheel mounting seat 510 along the width direction of the machine tool 100. A protrusion is arranged on the first sliding block 540, the protrusion is located in the second sliding groove 511, and the thickness of the protrusion gradually increases in the direction towards the roller structure 300, so that the support wheel mounting shaft 530 can push the first sliding block 540 to move along the width direction of the support wheel mounting seat 510 when the support wheel mounting shaft 530 moves leftward and downward along the second sliding groove 511.

[0056] The second sliding block 550 is in sliding fit with the support wheel mounting seat 510, and the second sliding block 550 can move along the height direction of the support wheel mounting seat 510. The first sliding block 540 and the second sliding block 550 abut against each other, when the support wheel mounting shaft 530 moves towards the roller structure 300 along the second sliding groove 511, the support wheel mounting shaft 530 will push the first sliding block 540 to press the second sliding block 550, and the second sliding block 550 will extend out of the support wheel mounting seat 510 along the height direction of the support wheel mounting seat 510.

[0057] The two ends of the first elastic member are connected with the support wheel mounting base 510 and the second sliding block 550 respectively, and the first elastic member makes the second sliding block 550 have a tendency to return to the support wheel mounting base 510. The two ends of the second elastic member are connected with the support wheel mounting base 510 and the second working platform 120 respectively, and the second elastic member makes the support wheel mounting base 510 have a tendency to return to the lower side of the roller structure 300 along the width direction of the machine tool 100.

[0058] Referring to Figure 6 A slope 551 is arranged on the top of the second sliding block 550, and the slope 551 is in abutment with the core roller mounting base 410. The slope 551 makes the thickness of the second sliding block 550 gradually decrease along the height direction of the machine tool 100, so that when the second sliding block 550 moves downward along the height direction of the machine tool 100, the support wheel mounting base 510 can move to the lower side of the roller structure 300 along the width direction of the machine tool 100, that is, the support wheel mounting base 510 moves outward along the direction perpendicular to the drawing.

[0059] The bearing ring cold rolling equipment disclosed in the embodiment works as follows:

[0060] At the beginning, the support wheel body 520 is located in the plane of the roller body 320 and the positioning shaft 200, and the core roller body 420 is retreated to the rear side, so that the bearing ring 700 can be conveniently installed between the roller body 320, the positioning shaft 200 and the support wheel body 520.

[0061] Then the core roller structure 400 is moved to the left side along the fifth sliding groove 113 to be between the roller body 320 and the positioning shaft 200, and then the support wheel body 520 and the core roller body 420 are moved to the left side together to cold roll and expand the bearing ring 700, and the support wheel body 520 moves to the right lower side. Since the thickness of the bearing ring 700 decreases when the diameter of the bearing ring 700 increases, the speed of the core roller moving along the fourth sliding groove 112 can be slightly greater than the moving speed of the roller body 320.

[0062] During the process, the support wheel body 520 moves to the right lower side to push the first sliding block 540 to move backward along the width direction of the support wheel mounting base 510, and the first sliding block 540 pushes the second sliding block 550 to move upward along the height direction of the support wheel mounting base 510 until the second sliding block 550 protrudes from the upper surface of the support wheel mounting base 510.

[0063] After the bearing ring 700 is processed, first, the core roller body 420 is moved back to the connection between the fourth sliding groove 112 and the fifth sliding groove 113, at this time, the core roller mounting seat 410 will abut against the outside of the second sliding block 550. Then, when the core roller body 420 is moved backward along the fifth sliding groove 113, the core roller mounting seat 410 will push the support wheel mounting seat 510 to move backward through the second sliding block 550. When the support wheel body 520 is out of the plane where the roller body 320 and the positioning shaft 200 are located, the bearing ring 700 can be dropped downward to complete the discharging.

[0064] After the discharging is completed, the roller body 320 is moved rightward together with the support wheel body 520. In this process, the support wheel mounting shaft 530 will move along the second sliding groove 511 toward the upper right of the support wheel mounting seat 510, at this time, through the elastic force of the first elastic member, the second sliding block 550 will gradually move downward, while the first sliding block 540 will gradually move outward, and since the top of the second sliding block 550 is provided with a slope 551, under the action of the second elastic member, the support wheel mounting seat 510 will also drive the support wheel body 520 to move outward. When the roller body 320 is moved to the initial position, the support wheel body 520 is just back to the plane where the roller body 320 and the positioning shaft 200 are located.

[0065] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bearing ring cold rolling apparatus characterized by, The machine tool comprises: a machine tool; a positioning shaft installed on the machine tool; a roller structure in sliding fit with the machine tool, the roller structure being spaced apart from the positioning shaft along the length direction of the machine tool and being movable relative to the machine tool along the length direction of the machine tool; a core roller structure between the positioning shaft and the roller structure, the core roller structure being in sliding fit with the machine tool and being movable relative to the machine tool along the length direction of the machine tool; a support wheel structure below the positioning shaft and between the positioning shaft and the roller structure; and a transmission structure comprising a first sliding plate, a second sliding plate, a chain and two sprockets, the first sliding plate and the second sliding plate being in sliding connection with the machine tool, the roller structure being connected with the first sliding plate, the support wheel structure being connected with the second sliding plate, the two sprockets being installed on the second sliding plate, the chain being wound between the two sprockets, the bottom of the chain being in engagement with the machine tool, and the first sliding plate being connected with the chain; the movement distance of the first sliding plate is twice the movement distance of the second sliding plate through the cooperation of the chain and the sprockets. The core roller structure comprises a core roller body and a core roller mounting seat, the core roller body being in rotational connection with the core roller mounting seat, the core roller mounting seat being movable relative to the machine tool along the length direction of the machine tool and being movable relative to the machine tool along the width direction of the machine tool; 2. The bearing ring cold rolling apparatus of claim 1, wherein The support wheel structure comprises a support wheel body, a support wheel mounting shaft and a support wheel mounting seat, the support wheel body being in rotational connection with the support wheel mounting shaft, the support wheel mounting shaft being in sliding fit with the support wheel mounting seat, the support wheel mounting seat being in sliding fit with the machine tool, the core roller mounting seat being capable of pushing the support wheel mounting seat to move together when the core roller mounting seat moves away from between the roller structure and the positioning shaft along the width direction of the machine tool. The second sliding plate is provided with a first sliding groove, the first sliding groove being arranged along the height direction of the second sliding plate and penetrating through the second sliding plate along the thickness direction of the second sliding plate, the support wheel mounting shaft being in sliding fit with the first sliding groove; 3. The bearing ring cold rolling apparatus of claim 2, wherein The support wheel mounting seat is provided with a second sliding groove, the second sliding groove being arranged obliquely, the end of the second sliding groove close to the roller structure being lower, and the second sliding groove and the first sliding groove always overlapping each other in the width direction of the machine tool so that the support wheel mounting shaft is capable of moving along the second sliding groove when the second sliding plate moves along the length direction of the machine tool. ​ 4. The bearing ring cold rolling apparatus of claim 3, wherein The support wheel structure further comprises a first sliding block, a second sliding block and a first elastic member, the first sliding block is located in the second sliding groove and is in sliding fit with the support wheel mounting seat, the second sliding block is in sliding fit with the support wheel mounting seat, and the first sliding block and the second sliding block abut against each other, when the support wheel mounting shaft moves along the second sliding groove towards the roller structure, the support wheel mounting shaft pushes the first sliding block to extrude the second sliding block, and the second sliding block extends out of the support wheel mounting seat along the height direction of the support wheel mounting seat, and the two ends of the first elastic member are connected with the support wheel mounting seat and the second sliding block respectively, and the first elastic member enables the second sliding block to have a tendency to return to the support wheel mounting seat.

5. The bearing ring cold rolling apparatus of claim 4, wherein A protrusion is arranged on the first sliding block, the protrusion is located in the second sliding groove, and the thickness of the protrusion gradually increases in the direction towards the roller structure, so that the support wheel mounting shaft can push the first sliding block to move along the width direction of the support wheel mounting seat when moving along the second sliding groove.

6. The bearing ring cold rolling apparatus of claim 4, wherein The first sliding block can move relative to the support wheel mounting seat along the width direction of the machine tool, and the second sliding block can move relative to the support wheel mounting seat along the height direction of the machine tool.

7. The bearing ring cold rolling apparatus of claim 6, wherein The support wheel structure further comprises a second elastic member, the two ends of the second elastic member are connected with the support wheel mounting seat and the machine tool respectively, and the second elastic member enables the support wheel mounting seat to have a tendency to return to below the roller structure along the width direction of the machine tool. The top of the second sliding block is provided with an inclined surface, the inclined surface is in abutting fit with the core roller mounting seat, the thickness of the second sliding block gradually decreases in the direction upwards along the height direction of the machine tool, so that when the second sliding block moves downwards along the height direction of the machine tool, the support wheel mounting seat can move the roller structure below along the width direction of the machine tool.

8. A bearing ring cold rolling apparatus according to any one of claims 1 to 7, wherein The machine tool is provided with a third sliding groove, a fourth sliding groove and a fifth sliding groove, the third sliding groove and the fourth sliding groove are arranged in parallel, the third sliding groove is arranged along the length direction of the machine tool, the fifth sliding groove is arranged along the width direction of the machine tool, and the fifth sliding groove communicates with one end of the fourth sliding groove away from the third sliding groove, the roller structure is in sliding fit with the third sliding groove, and the core roller structure is in sliding fit with the fourth sliding groove.

9. The bearing ring cold rolling apparatus of claim 8, wherein, The length of the fourth sliding groove is greater than the length of the third sliding groove.

10. The bearing ring cold rolling apparatus of claim 8, wherein, The machine tool comprises a first working platform and a second working platform, the first working platform and the second working platform are arranged in interval along the height direction of the machine tool, the first working platform is located above the second working platform, the third sliding groove and the fourth sliding groove are arranged on the first working platform, and the positioning shaft is also arranged on the first working platform, and the first sliding plate and the second sliding plate are in sliding fit with the second working platform.

Images