A grinding device for manufacturing mechanical parts

Abstract

The present invention relates to a grinding device for manufacturing mechanical parts applied in the field of mechanical parts manufacturing, comprising a grinding tool group, the grinding tool group comprising a fixed tube and a grinding tool unit, the grinding tool unit being provided with a plurality of grinding operations capable of completing different precisions respectively, the grinding tool unit comprising a fixed disk, a first grinding wheel and a second grinding wheel, an adjusting mechanism for driving the first grinding wheel and the second grinding wheel to expand or contract is also installed in the fixed tube, the grinding tool group and the adjusting mechanism are adopted, the process of avoiding repeated positioning is realized, the time of replacing grinding tool units of different models is saved, and at the same time, the conditions of cumbersome positioning and poor repeated positioning precision etc. which may be caused by repeated positioning after replacing the grinding tool unit are avoided, and the problem of reduced qualified rate of finished workpieces which may be caused by repeated positioning is avoided, thereby not only accelerating production efficiency, but also improving production quality at the same time, and having better use effect.

Description

Technical Field

[0001] The invention relates to a grinding device, in particular to a grinding device for manufacturing mechanical parts applied in the field of mechanical parts manufacturing. Background Art

[0002] Bearings are important parts in mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Rolling bearings are generally composed of four parts: an outer ring, an inner ring, rolling elements, and a cage. There are usually raceways on the inner ring wall of the outer ring and the outer ring wall of the inner ring for mounting rolling elements and providing running space for rolling elements. Therefore, the raceways of the bearings need to be processed, usually by grinding. However, the relevant grinding devices still have the following disadvantages in actual use:

[0003] 1. First of all, when machining the raceway of the bearing (taking the inner ring wall raceway machining of the outer ring of the bearing as an example below), it is not enough to grind with a single tool. In order to ensure the efficient operation of the bearing, it is necessary to make the raceway smooth enough for the rolling elements to pass through, so as to reduce friction as much as possible. However, conventional grinding devices constantly replace the grinding materials to achieve gradual grinding and smoothness, which is relatively cumbersome in actual operation and cannot quickly complete the machining of the bearing raceway;

[0004] 2. The inner diameter and raceway width of different bearings are inconsistent. If only one grinding device with a fixed size is used, it will be difficult to meet the raceway grinding needs of various bearings.

[0005] In order to solve the above problems, the Chinese patent CN220240917U specification discloses a grinding device for the inner ring raceway of a bearing, which relates to the technical field of mechanical parts processing. The utility model includes a base, a tripod and a clamping rod, a vertical plate is fixed on the upper end of the base, a hollow shaft is rotatably connected in the vertical plate, a tripod is fixed on the outer peripheral surface of one end of the hollow shaft extending out of the vertical plate, a limit ring is fixed on each shaft rod, and a grinding wheel, a polishing wheel and a fine polishing wheel are respectively sleeved on the outer periphery of the three shaft rods; a jacket is fixed in the middle of the clamping rod, and the outer periphery of the clamping rod at both ends of the jacket is sleeved with a clamping plate, and the output shaft of the rotating motor is fixedly connected to the outer periphery of the jacket. The grinding device for the inner ring raceway of the bearing solves the problem that the same grinding device cannot grind the bearing raceway with increasing precision, and the bearing raceways of different sizes and widths cannot be processed by the same grinding device by setting a tripod, a grinding wheel, a polishing wheel, a fine polishing wheel, a square frame and a rotating motor.

[0006] In the above device, when performing grinding processing of mechanical parts (bearings) with different precisions, it is necessary to first separate the mechanical parts that have been processed once from the grinding tools (i.e., grinding wheels, polishing wheels, and fine polishing wheels, etc.), then release the positioning of the current grinding tool, and then rotate multiple grinding tools and repeatedly position them, and then fix the grinding tools, and finally bring the mechanical parts close to the grinding tools again, and finally make the mechanical parts and the grinding tools fit together before starting the next grinding operation. The operation steps are relatively cumbersome, and the time for replacing the grinding tools at a single time is long, resulting in low processing efficiency; at the same time, considering the wear of the device components, after long-term use, the accuracy of repeated positioning gradually decreases, which can easily lead to an increase in the processing error after repeated positioning, thereby resulting in a lower qualified rate of finished mechanical parts after processing. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to design a grinding device for manufacturing mechanical parts that is easy to replace grinding tools of different precisions, can reduce the steps and time required for replacing grinding tools, improve processing efficiency, and at the same time avoid the need for repeated positioning, thereby avoiding adverse effects such as a decrease in the quality of the finished mechanical parts due to a decrease in repeated positioning accuracy.

[0008] In order to solve the above problems, the present invention provides a grinding device for manufacturing mechanical parts, comprising an adjustable fixture rotatably mounted on a mounting seat and a driving motor for driving the adjustable fixture to rotate, a grinding tool group is mounted on the other side of the mounting seat opposite to the adjustable fixture, and an adjusting cylinder for driving the grinding tool group to move forward and backward is mounted on the rear side of the grinding tool group;

[0009] Grinding knife set includes:

[0010] A fixed pipe, the fixed pipe is fixed to the end of the piston rod of the regulating cylinder;

[0011] A grinding knife unit, wherein a plurality of grinding knife units are provided, and the plurality of grinding knife units have the same structure but different models, and the plurality of grinding knife units can respectively perform grinding operations of different precisions;

[0012] The grinding knife unit includes a fixed disc, a first grinding wheel and a second grinding wheel;

[0013] The fixed plate is detachably fixed to the outer wall of the fixed tube, the first grinding wheel and the second grinding wheel are elastically slidably connected to the fixed tube through a connecting piece, the first grinding wheel and the second grinding wheel form a disc-shaped grinding wheel when they are unfolded, and the first grinding wheel and the second grinding wheel are staggered when they are retracted;

[0014] An adjusting mechanism for driving the first grinding wheel and the second grinding wheel to expand or contract is also installed in the fixed tube.

[0015] In the above-mentioned grinding device for manufacturing mechanical parts, by providing a plurality of grinding knife units that can be expanded and retracted and setting them to different models, the grinding knife units of different models can be expanded by adjusting the mechanism without changing the axis of the grinding knife unit, so as to perform grinding processing of different precisions on the workpiece, making the grinding device for manufacturing mechanical parts more convenient to use;

[0016] At the same time, compared with the prior art that requires repeated positioning of the grinding tool, the grinding device for mechanical parts manufacturing avoids the process of repeated positioning, and there is no need to change the height and horizontal position of the workpiece during the processing. Therefore, time is saved when replacing grinding tool units of different models. At the same time, it can avoid the cumbersome positioning and poor repeated positioning accuracy that may be caused by repeated positioning after replacing the grinding tool unit, and avoid the reduction in the qualified rate of workpiece processing products due to repeated positioning, thereby not only speeding up production efficiency, but also improving production quality, and having a better use effect.

[0017] As a further supplement to the present application, the connecting member includes a movable support rod, one end of which is located in the fixed tube and elastically connected to the inner wall of the fixed tube through a first spring, and the other end of the movable support rod slides through the fixed tube, and the sliding direction of the movable support rod is consistent with the radial direction of the fixed tube;

[0018] A plurality of movable support rods are provided and correspond to the first grinding wheel and the second grinding wheel respectively;

[0019] The end of the movable support rod corresponding to the first grinding wheel is fixed to the grinding knife unit, and the end of the movable support rod corresponding to the second grinding wheel is slidably connected with a movable column, the end of the movable column passes through the end of the movable support rod and the sliding direction is consistent with the axial direction of the fixed tube, and the other end of the movable column is fixed to the second grinding wheel through a connecting block.

[0020] As a further supplement to the present application, first inclined portions are provided on both side edges of the first grinding wheel, and second inclined portions are provided on both side edges of the second grinding wheel, and the first inclined portions and the second inclined portions have the same inclination angle and opposite directions;

[0021] After the first grinding wheel and the second grinding wheel are unfolded, the first inclined portion and the second inclined portion abut and fit each other.

[0022] As a further supplement to the present application, a guide groove for guiding the sliding of the movable column is provided on the fixed plate;

[0023] A second spring is sleeved on the movable column, and two ends of the second spring are respectively fixed to one side of the movable support rod and one side of the connecting block;

[0024] The movable support rod is provided with a receiving groove, and the receiving groove is used for receiving the contracted second spring.

[0025] As a further supplement to the present application, a plurality of through holes are provided on the fixed tube, the plurality of through holes are distributed along the circumference of the axis of the fixed tube, the plurality of through holes correspond to a plurality of movable support rods respectively, and the movable support rods are slidably connected to the fixed tube through the through holes;

[0026] A limiting nut for limiting the positions of the plurality of grinding knife units is threadedly connected to the front end of the fixing tube.

[0027] As a further supplement to the present application, the adjustment mechanism includes a support block and a control cylinder. The support block is movably installed in a fixed tube. The control cylinder is fixed to one end of the fixed tube. The control cylinder is fixed to the piston rod end of the adjustment cylinder. The piston rod end of the control cylinder is fixed to one side of the support block.

[0028] As a further supplement to the present application, a truncated cone-shaped chamfered portion is provided at one end of the support block away from the control cylinder, and a horizontal extension portion of the truncated cone-shaped chamfered portion of the support block is located in the gap between the plurality of movable support rods.

[0029] As a further supplement to the present application, the guide groove forms an inclined guide wall close to the inner side wall of the fixed tube, and the guide groove forms a horizontal wall extending horizontally away from the outer side wall of the fixed tube;

[0030] When the second grinding wheel is expanded, the end of the movable column is in active contact with the horizontal wall of the guide groove. When the second grinding wheel is retracted, the end of the movable column gradually moves along the inclined guide wall of the guide groove to the side away from the control cylinder.

[0031] In summary, by providing a plurality of grinding knife units that can be expanded and retracted and setting them to different models, different models of grinding knife units can be expanded by adjusting the mechanism without changing the axis of the grinding knife unit, so as to perform grinding processing with different precisions on the workpiece, making the grinding device for manufacturing mechanical parts more convenient to use;

[0032] When the piston rod of the control cylinder pushes the support block to move away from the control cylinder, the front end of the truncated cone-shaped chamfered portion of the support block first abuts against the end of the movable support rod corresponding to the second grinding wheel piece, and drives the movable support rod corresponding to the second grinding wheel piece to slide radially outwardly along the fixed tube, thereby pushing the second grinding wheel piece to gradually unfold. During this process, the front end of the truncated cone-shaped chamfered portion of the support block approaches and abuts against the end of the movable support rod corresponding to the first grinding wheel piece, thereby pushing the first grinding wheel piece to slide outwardly and unfold. After the first grinding wheel piece and the second grinding wheel piece have unfolded a certain distance, the first inclined portion and the second inclined portion abut against each other and obliquely fit together. At this time, the second grinding wheel piece moves toward one side of the movable support rod under the action of the movable column and the second spring, thereby completing the unfolding in cooperation with the action of the support block, and finally the first grinding wheel piece and the second grinding wheel piece form a disc-shaped grinding wheel structure with a larger diameter, so that the first grinding wheel piece and the second grinding wheel piece can be combined to perform grinding processing on the workpiece;

[0033] When the support block is separated from the end of the movable support rod, the movable support rod is reset under the elastic force of the first spring, thereby pulling the first grinding wheel and the second grinding wheel to retract inward. At this time, the first grinding wheel and the second grinding wheel are staggered and separated under the action of the guide groove, the first inclined portion and the second inclined portion, so that the first grinding wheel and the second grinding wheel are reset, ensuring that the grinding knife unit is automatically reset and separated from the workpiece when not in use;

[0034] At the same time, compared with the prior art that requires multiple repeated positioning of the grinding tool, the grinding device for mechanical parts manufacturing avoids the process of repeated positioning, and there is no need to change the height and horizontal position of the workpiece during the processing. Therefore, the time for replacing different types of grinding tool units is saved. At the same time, it can avoid the cumbersome positioning and poor repeated positioning accuracy that may be caused by repeated positioning after replacing the grinding tool unit, and avoid the problem of reduced qualified rate of workpiece processing products due to repeated positioning, thereby not only speeding up production efficiency, but also improving production quality, and having a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present application;

[0036] Figure 2 This is a schematic diagram of the structure of the grinding tool assembly and the control cylinder of the first embodiment of the present application;

[0037] Figure 3 A partial cross-sectional view of a grinding tool assembly according to the first embodiment of the present application;

[0038] Figure 4 This is a schematic diagram of the structure of a grinding knife unit according to the first embodiment of the present application;

[0039] Figure 5 for Figure 3 A magnified view of the structure at center;

[0040] Figure 6 This is a state diagram of the grinding knife unit of the first embodiment of the present application when it is retracted;

[0041] Figure 7 A cross-sectional view of the grinding knife unit in the first embodiment of the present application during the unfolding process;

[0042] Figure 8 This is a schematic diagram of the combined structure of the grinding knife unit after it is unfolded according to the first embodiment of the present application.

[0043] Description of the numbers in the figure:

[0044] 1. Mounting seat; 2. Adjustable clamp; 3. Driving motor; 4. Grinding tool assembly; 41. Fixed tube; 411. Through hole; 42. Movable support rod; 421. First spring; 422. Movable column; 423. Second spring; 424. Accommodating groove; 43. Grinding tool unit; 431. Fixed plate; 4311. Guide groove; 432. First grinding wheel; 4321. First inclined portion; 433. Second grinding wheel; 4331. Second inclined portion; 4332. Connecting block; 44. Limiting nut; 5. Support block; 6. Adjusting cylinder; 7. Control cylinder. DETAILED DESCRIPTION

[0045] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0046] The first implementation method:

[0047] The present invention provides a grinding device for manufacturing mechanical parts, see Figure 1-Figure 3 as well as Figure 6-Figure 8 , including an adjustable fixture 2 rotatably mounted on a mounting seat 1 and a driving motor 3 for driving the adjustable fixture 2 to rotate, a grinding knife group 4 is mounted on the other side of the mounting seat 1 opposite to the adjustable fixture 2, and an adjusting cylinder 6 for driving the grinding knife group 4 to move forward and backward is mounted on the rear side of the grinding knife group 4;

[0048] Grinding knife set 4 includes:

[0049] A fixed tube 41, the fixed tube 41 is fixed to the end of the piston rod of the regulating cylinder 6;

[0050] A grinding knife unit 43, wherein a plurality of grinding knife units 43 are provided, and the plurality of grinding knife units 43 have the same structure but different models, and the plurality of grinding knife units 43 can respectively perform grinding operations with different precisions;

[0051] The grinding blade unit 43 includes a fixed plate 431, a first grinding wheel 432 and a second grinding wheel 433;

[0052] The fixed plate 431 is detachably fixed to the outer wall of the fixed tube 41, and the first grinding wheel 432 and the second grinding wheel 433 are elastically slidably connected to the fixed tube 41 through a connecting piece. When the first grinding wheel 432 and the second grinding wheel 433 are unfolded, they form a disc-shaped grinding wheel, and when the first grinding wheel 432 and the second grinding wheel 433 are contracted, they are staggered.

[0053] An adjusting mechanism for driving the first grinding wheel 432 and the second grinding wheel 433 to expand or contract is also installed in the fixing tube 41 .

[0054] Based on the above structure, by providing a plurality of grinding knife units 43 that can be expanded and retracted, and setting them to different models (mainly reflected in different grinding processing precisions, that is, different grinding particle sizes), different models of grinding knife units 43 can be expanded through the adjustment mechanism without changing the axis of the grinding knife unit 43 (that is, the axis of the fixed tube 41 remains unchanged), so as to perform grinding processing of different precisions on the workpiece, making the grinding device for manufacturing mechanical parts more convenient to use;

[0055] At the same time, compared with the prior art that requires repeated positioning of the grinding tool, the grinding device for manufacturing mechanical parts avoids the process of repeated positioning (processing axis), and there is no need to change the height and horizontal position of the workpiece during the processing. Therefore, the time for replacing grinding tool units 43 of different models (precision) is saved. At the same time, it can avoid the cumbersome positioning and poor repeated positioning accuracy that may be caused by repeated positioning after replacing the grinding tool unit 43, and avoid the problem of reduced qualified rate of workpiece processing products due to repeated positioning, thereby not only speeding up production efficiency, but also improving production quality, and having a better use effect.

[0056] Figure 3-Figure 5 The connecting member is shown to include a movable support rod 42, one end of which is located in the fixed tube 41 and elastically connected to the inner wall of the fixed tube 41 through a first spring 421, and the other end of the movable support rod 42 slides through the fixed tube 41, and the sliding direction of the movable support rod 42 is consistent with the radial direction of the fixed tube 41;

[0057] There are a plurality of movable support rods 42, which correspond to the first grinding wheel 432 and the second grinding wheel 433 respectively;

[0058] The end of the movable support rod 42 corresponding to the first grinding wheel 432 is fixed to the grinding knife unit 43, and the end of the movable support rod 42 corresponding to the second grinding wheel 433 is slidably connected with a movable column 422, the end of the movable column 422 passes through the end of the movable support rod 42 and the sliding direction is consistent with the axial direction of the fixed tube 41, and the other end of the movable column 422 is fixed to the second grinding wheel 433 through a connecting block 4332;

[0059] The first grinding wheel 432 is provided with first inclined portions 4321 on both side edges, and the second grinding wheel 433 is provided with second inclined portions 4331 on both side edges. The first inclined portions 4321 and the second inclined portions 4331 have the same inclination angle and opposite directions.

[0060] After the first grinding wheel 432 and the second grinding wheel 433 are unfolded, the first inclined portion 4321 and the second inclined portion 4331 abut and fit each other;

[0061] The adjustment mechanism includes a support block 5 and a control cylinder 7. The support block 5 is movably installed in the fixed tube 41. The control cylinder 7 is fixed to one end of the fixed tube 41. The control cylinder 7 is fixed to the piston rod end of the adjustment cylinder 6. The piston rod end of the control cylinder 7 is fixed to one side of the support block 5.

[0062] A truncated cone-shaped chamfered portion is provided at one end of the support block 5 away from the control cylinder 7, and a horizontal extension of the truncated cone-shaped chamfered portion of the support block 5 is located in the gap between the plurality of movable support rods 42;

[0063] The fixing plate 431 is provided with a guide groove 4311 for guiding the movable column 422 to slide. The guide groove 4311 forms an inclined guide wall near the inner side wall of the fixing tube 41, and forms a horizontal wall extending horizontally away from the outer side wall of the fixing tube 41.

[0064] The movable column 422 is sleeved with a second spring 423, and two ends of the second spring 423 are respectively fixed to one side of the movable support rod 42 and one side of the connecting block 4332;

[0065] The movable support rod 42 is provided with a receiving groove 424 , and the receiving groove 424 is used to receive the contracted second spring 423 .

[0066] When the piston rod of the control cylinder 7 pushes the support block 5 to move away from the control cylinder 7, the front end of the truncated cone-shaped chamfered portion of the support block 5 first abuts against the end of the movable support rod 42 corresponding to the second grinding wheel 433, and drives the movable support rod 42 corresponding to the second grinding wheel 433 to slide radially outwardly along the fixed tube 41, thereby pushing the second grinding wheel 433 to gradually unfold. In this process, the front end of the truncated cone-shaped chamfered portion of the support block 5 approaches and abuts against the end of the movable support rod 42 corresponding to the first grinding wheel 432, thereby pushing the first grinding wheel 432 outward. Lateral sliding expansion, when the first grinding wheel 432 and the second grinding wheel 433 are expanded to a certain distance, the first inclined portion 4321 and the second inclined portion 4331 abut against each other and fit obliquely, at this time, the second grinding wheel 433 moves toward the side of the movable support rod 42 under the action of the movable column 422 and the second spring 423, thereby completing the expansion in cooperation with the support block 5, and finally making the first grinding wheel 432 and the second grinding wheel 433 form a disc-shaped grinding wheel structure with a larger diameter, so that the first grinding wheel 432 and the second grinding wheel 433 can be combined to grind the workpiece;

[0067] When the support block 5 is separated from the end of the movable support rod 42, the movable support rod 42 is reset under the elastic force of the first spring 421, thereby pulling the first grinding wheel 432 and the second grinding wheel 433 to retract inward. At this time, the first grinding wheel 432 and the second grinding wheel 433 are staggered and separated under the action of the guide groove 4311, the first inclined portion 4321 and the second inclined portion 4331, thereby resetting the first grinding wheel 432 and the second grinding wheel 433, ensuring that the grinding knife unit 43 is automatically reset and separated from the workpiece when not in use.

[0068] In addition, when the second grinding wheel 433 is unfolded, the end of the movable column 422 is in active contact with the horizontal wall of the guide groove 4311. When the second grinding wheel 433 is retracted, the end of the movable column 422 gradually moves along the inclined guide wall of the guide groove 4311 to the side away from the control cylinder 7, so that the second grinding wheel 433 can remain stable during the unfolding and retracting process, avoiding friction or collision between the second grinding wheel 433 and other structures, thereby extending the service life of the second grinding wheel 433.

[0069] Figure 2-Figure 3 It is shown that a plurality of through holes 411 are provided on the fixed tube 41, and the plurality of through holes 411 are distributed along the circumference of the axis of the fixed tube 41, and the plurality of through holes 411 correspond to a plurality of movable support rods 42 one by one, and the movable support rods 42 are slidably connected to the fixed tube 41 through the through holes 411;

[0070] A limiting nut 44 for limiting the positions of the plurality of grinding knife units 43 is threadedly connected to the front end of the fixing tube 41 , thereby ensuring the stability of the plurality of grinding knife units 43 during the processing.

[0071] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A grinding device for manufacturing mechanical parts, comprising an adjustable fixture (2) rotatably mounted on a mounting seat (1) and a driving motor (3) for driving the adjustable fixture (2) to rotate, a grinding tool group (4) being mounted on the other side of the mounting seat (1) opposite to the adjustable fixture (2), and an adjusting cylinder (6) for driving the grinding tool group (4) to move forward and backward being mounted on the rear side of the grinding tool group (4), characterized in that: The grinding tool set (4) comprises: A fixed tube (41), wherein the fixed tube (41) is fixed to the end of the piston rod of the regulating cylinder (6); A grinding knife unit (43), wherein a plurality of the grinding knife units (43) are provided, the plurality of grinding knife units (43) have the same structure but different models, and the plurality of grinding knife units (43) can respectively perform grinding operations with different precisions; The grinding knife unit (43) comprises a fixed disc (431), a first grinding wheel (432) and a second grinding wheel (433); The fixed disk (431) is detachably fixed to the outer wall of the fixed tube (41); the first grinding wheel (432) and the second grinding wheel (433) are elastically slidably connected to the fixed tube (41) via a connecting piece; the first grinding wheel (432) and the second grinding wheel (433) form a disc-shaped grinding wheel when unfolded; and the first grinding wheel (432) and the second grinding wheel (433) are staggered when retracted; An adjusting mechanism for driving the first grinding wheel (432) and the second grinding wheel (433) to expand or contract is also installed in the fixed tube (41); The connecting member comprises a movable support rod (42), one end of the movable support rod (42) is located in the fixed tube (41) and is elastically connected to the inner wall of the fixed tube (41) via a first spring (421), the other end of the movable support rod (42) slides through the fixed tube (41), and the sliding direction of the movable support rod (42) is consistent with the radial direction of the fixed tube (41); The movable support rods (42) are provided in a plurality and correspond one to one with the first grinding wheel (432) and the second grinding wheel (433) respectively; The end of the movable support rod (42) corresponding to the first grinding wheel (432) is fixed to the grinding knife unit (43), and the end of the movable support rod (42) corresponding to the second grinding wheel (433) is slidably connected to a movable column (422), the end of the movable column (422) passes through the end of the movable support rod (42) and the sliding direction is consistent with the axial direction of the fixed tube (41), and the other end of the movable column (422) is fixed to the second grinding wheel (433) via a connecting block (4332); The fixed plate (431) is provided with a guide groove (4311) for guiding the movable column (422) to slide. A second spring (423) is sleeved on the movable column (422), and two ends of the second spring (423) are respectively fixed to one side of the movable support rod (42) and one side of the connecting block (4332); The movable support rod (42) is provided with a receiving groove (424), and the receiving groove (424) is used to receive the contracted second spring (423).

2. A grinding device for manufacturing mechanical parts according to claim 1, characterized in that: The first grinding wheel (432) is provided with first inclined portions (4321) on both side edges, and the second grinding wheel (433) is provided with second inclined portions (4331) on both side edges, and the first inclined portions (4321) and the second inclined portions (4331) have the same inclination angle and opposite directions; After the first grinding wheel (432) and the second grinding wheel (433) are unfolded, the first inclined portion (4321) and the second inclined portion (4331) abut against and fit each other.

3. A grinding device for manufacturing mechanical parts according to claim 2, characterized in that: The fixed tube (41) is provided with a plurality of through holes (411), the plurality of through holes (411) are distributed along the circumference of the axis of the fixed tube (41), the plurality of through holes (411) correspond to a plurality of movable support rods (42) respectively, and the movable support rods (42) are slidably connected to the fixed tube (41) via the through holes (411); A limiting nut (44) for limiting the positions of the plurality of grinding knife units (43) is threadedly connected to the front end of the fixing tube (41).

4. A grinding device for manufacturing mechanical parts according to claim 3, characterized in that: The adjustment mechanism comprises a support block (5) and a control cylinder (7); the support block (5) is movably mounted in a fixed tube (41); the control cylinder (7) is fixed to one end of the fixed tube (41); the control cylinder (7) is fixed to the end of a piston rod of an adjustment cylinder (6); and the end of the piston rod of the control cylinder (7) is fixed to one side of the support block (5).

5. A grinding device for manufacturing mechanical parts according to claim 4, characterized in that: A truncated cone-shaped chamfered portion is provided at one end of the support block (5) away from the control cylinder (7), and a horizontal extension portion of the truncated cone-shaped chamfered portion of the support block (5) is located in the gap between the plurality of movable support rods (42).

6. A grinding device for manufacturing mechanical parts according to claim 5, characterized in that: The guide groove (4311) forms an inclined guide wall close to the inner side wall of the fixed tube (41), and the guide groove (4311) forms a horizontal wall extending horizontally away from the outer side wall of the fixed tube (41); When the second grinding wheel (433) is expanded, the end of the movable column (422) is in movable contact with the horizontal wall of the guide groove (4311); when the second grinding wheel (433) is retracted, the end of the movable column (422) gradually moves along the inclined guide wall of the guide groove (4311) to a side away from the control cylinder (7).

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