Super-finishing grinding machine for outer ring of deep groove ball bearing

Abstract

The deep groove ball bearing outer ring superfinishing grinding machine comprises a movable base plate, a grinding table is installed at one end of the movable base plate, and a grinding equipment body is arranged in the middle of the grinding table; on one hand, through cooperative use of the position adjusting assembly and the locking assembly, continuous feeding and stable clamping of grinding depths of different positions of the outer ring of the deep groove ball bearing can be achieved in the continuous grinding process, and the situations of excessive grinding and limited grinding in the grinding process of the outer ring of the bearing are avoided; on the other hand, through the additionally-arranged control system, the current grinding allowance can be effectively determined according to relevant parameters of the outer ring of the deep groove ball bearing in the current continuous grinding process, the current radial cutting coefficient is further determined according to parameter calculation, the radial cutting coefficient and a radial cutting threshold value are compared and analyzed, and the grinding precision is improved. And the position regulation and control action of the outer ring of the deep groove ball bearing is obtained, and finally the accurate control over the grinding amount in the grinding process of the outer ring of the deep groove ball bearing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing and grinding, and in particular to a super-finishing grinder for an outer ring of a deep groove ball bearing. Background Art

[0002] Deep groove ball bearings, formerly known as radial ball bearings, are the most widely used rolling bearings. Fine grinding is required during the finishing process to meet the requirements for cylindricity during installation. For example, an improved peripheral surface grinding machine for the outer ring of a bearing disclosed in Publication No. CN105881121A uses a grinding wheel to grind the bearing to be processed with continuous feeding, and the grinding process is accompanied by a water flushing step. The combination of the two realizes peripheral grinding.

[0003] However, the grinding progress of the outer ring of the bearing cannot be accurately known, that is, the grinding depth cannot be obtained in real time during grinding. If excessive grinding occurs, the bearing will be directly scrapped. In addition, if the grinding waste is to be removed, high-pressure washing must be used, which has problems such as inconvenient waste liquid collection and water splash impact diffusion.

[0004] To this end, this application proposes a solution. Summary of the invention

[0005] The object of the present invention is to provide a deep groove ball bearing outer ring superfinishing grinder, which is used to solve the problem of excessive grinding caused by the inability to obtain the grinding depth in real time during grinding.

[0006] The object of the present invention can be achieved through the following technical solutions: a deep groove ball bearing outer ring superfinishing grinder, comprising a movable base plate, a grinding table is installed at one end of the movable base plate, a grinding device body is arranged in the middle of the grinding table, and a control panel is embedded on the grinding table, a plurality of sets of bidirectional moving rings connected with each other by threads are suspended directly above the movable base plate, and a bearing outer ring body is arranged above the outer side of the bidirectional moving ring and mounted on the movable base plate;

[0007] The outer part of the bidirectional movable ring is sleeved with a position adjustment component, and the position adjustment component includes a connecting rod 1 and a connecting rod 2 which are respectively threadedly sleeved on the outer part of the bidirectional movable ring, and the ends of the connecting rod 1 and the connecting rod 2 are hinged;

[0008] The grinding table is symmetrically provided with locking components on both sides, and the locking components include motor A and motor B symmetrically arranged on the outside of the grinding table, and the output ends of the motor A and motor B are respectively installed with symmetrically arranged swing frames, and the outer end of the swing frame extending to the inner side of the grinding table is installed with a motor C, and the output end of the motor C is installed with a clamping wheel that fits with the inner ring side of the bearing outer ring body; the bearing outer ring body is jointly locked by the positioning component and the locking component.

[0009] It is further configured as follows: a pair of bidirectional movable rings are each provided with external threads in the middle, the bidirectional movable rings are respectively sleeved with spiral rings through the external threads, and the outer ends of the spiral rings are rotatably connected to the connecting rod 1 and the connecting rod 2.

[0010] It is further configured as follows: a driven rotating tooth is arranged on the outer ring side of the bidirectional movable ring, a driving assembly is arranged on the outer side of the bidirectional movable ring, the driving assembly includes an active rotating tooth meshed with the driven rotating tooth, a linkage rotating tooth is installed at one end of the active rotating tooth, and the linkage rotating tooth is meshed with a transmission rotating tooth meshed with the driven rotating tooth.

[0011] It is further configured as follows: the active rotating tooth and the linkage rotating tooth are coaxially arranged and have opposite spiral directions, a connecting rotating rod is installed at the outer end of the active rotating tooth, an active rotating rod is installed at the outer end of the linkage rotating tooth, a motor D for driving it to rotate is installed at the outer end of the active rotating rod, and a shaft rod is fixedly arranged at one end of the transmission rotating tooth.

[0012] It is further configured as follows: a rotating ring is commonly arranged between the ends of the adjacent bidirectional movable rings, and when the active rotating teeth rotate, the bidirectional movable rings of the same group are driven to perform opposite rotational motions.

[0013] It is further configured as follows: a moving roller is arranged inside the moving substrate, and the outer ring body of the bearing moves horizontally through the moving roller.

[0014] It is further configured as follows: the control panel has a built-in control system, the control system includes a diameter parameter acquisition end, a parameter analysis end, a tightening execution end and a processor that are communicatively connected, the diameter parameter acquisition end is used to acquire the sheet diameter value and the grinding feed value of the bearing outer ring during grinding, and send the sheet diameter value and the grinding feed value to the parameter analysis end.

[0015] It is further configured as follows: the parameter analysis end receives the sheet diameter value and the grinding feed value and performs the following specific analysis: the sheet diameter value and the grinding feed value are numerically calculated by the processor to obtain a radius cutting coefficient, and the radius cutting coefficient is compared with a radius cutting threshold preset in the processor to generate a control signal, and the control signal is sent to the tightening execution end to execute related actions.

[0016] The present invention has the following beneficial effects:

[0017] 1. The present invention aims at the problem of excessive grinding caused by the inability to obtain the grinding depth in real time during grinding; in the process of ultra-precision grinding of the outer ring of the deep groove ball bearing, the outer ring of the deep groove ball bearing can achieve continuous feeding and stable clamping of grinding depths at different positions during continuous grinding through the coordinated use of the positioning component and the locking component, thereby avoiding excessive grinding and grinding restriction during the grinding of the outer ring of the bearing; and through the additional control system, the current grinding allowance can be effectively determined according to the relevant parameters of the outer ring of the deep groove ball bearing in the current continuous grinding process, and the current diameter cutting coefficient can be further determined according to the parameter calculation, and the diameter cutting coefficient is compared and analyzed with the diameter cutting threshold, so as to obtain the position control action of the outer ring of the deep groove ball bearing, and finally achieve accurate control of the grinding amount during the grinding of the outer ring of the deep groove ball bearing, thereby avoiding the problem of excessive grinding;

[0018] 2. During the precise positioning process, the outer ring of the bearing is horizontally ground and fed through the moving base plate. When it moves to the grinding table position, the bidirectional moving ring is driven to rotate. The bidirectional moving ring drives the folding angle between connecting rod 1 and connecting rod 2 to become smaller. At the same time, motor A and motor B are started synchronously and drive the tightening wheels on both sides to rotate to the inner side of the outer ring of the bearing to complete the tightening. That is, under the joint cooperation of the positioning component and the locking component, the effective positioning of the current outer ring of the bearing is completed;

[0019] 3. In the process of intelligent control, after the tightening actuator receives the control signal, the control motor D is started. The motor D drives the active rotating rod and the connecting rotating rod to rotate, thereby driving the active rotating gear, the linkage rotating gear, and the transmission rotating gear to complete the synchronous rotation. At this time, the driven rotating gear completes the opposite rotation action under the driving action of the active rotating gear and the transmission rotating gear rotating in different directions, and finally realizes that the spiral rings outside the bidirectional moving ring are away from each other. At this time, when the tightening wheel remains in the locked state, it will drive the outer ring of the bearing to move downward to avoid the problem of excessive grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a rear view schematic diagram of the overall structure of the present invention;

[0023] Figure 3 It is a front view of the present invention;

[0024] Figure 4 It is a side view schematic diagram of the present invention;

[0025] Figure 5 It is a schematic diagram of the installation of the position adjustment component of the present invention;

[0026] Figure 6 It is a schematic diagram of the installation structure of the position adjustment component of the present invention;

[0027] Figure 7 It is a schematic diagram of the installation of the locking assembly of the present invention;

[0028] Figure 8 It is a schematic diagram of the disassembly of the installation structure of the bidirectional moving ring of the present invention;

[0029] Fig. 9 It is a schematic diagram of the expansion of the locking assembly of the present invention.

[0030] In the figure: 1. Moving substrate; 2. Grinding table; 3. Grinding equipment body; 4. Moving roller; 5. Bidirectional moving ring; 6. Bearing outer ring; 7. Rotating ring; 8. Active rotating rod; 9. Connecting rotating rod; 10. Active rotating gear; 11. Spiral ring; 12. Connecting rod 1; 13. External thread; 14. Connecting rod 2; 15. Motor A; 16. Motor B; 17. Swinging frame; 18. Tightening wheel; 19. Motor C; 20. Driven rotating gear; 21. Linkage rotating gear; 22. Transmission rotating gear. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Reference Figure 1 - Fig. 9 As shown, in this embodiment, a deep groove ball bearing outer ring superfinishing grinder comprises a movable base plate 1, a grinding table 2 is mounted on one end of the movable base plate 1, a grinding device body 3 is arranged in the middle of the grinding table 2, and a control panel is embedded on the grinding table 2;

[0033] A plurality of sets of bidirectional moving rings 5 ​​connected by threads are suspended directly above the moving base plate 1. A bearing outer ring body 6 is sleeved on the outside of the bidirectional moving ring 5 and mounted on the moving base plate 1. A positioning assembly is sleeved on the outside of the bidirectional moving ring 5.

[0034] The positioning assembly includes a connecting rod 12 and a connecting rod 2 14 which are respectively threadedly sleeved on the outside of the bidirectional movable ring 5, the ends of the connecting rod 12 and the connecting rod 2 14 are hinged, and locking assemblies are symmetrically arranged on both sides of the grinding table 2;

[0035] The locking assembly includes a motor A15 and a motor B16 symmetrically arranged on the outside of the grinding table 2, and the output ends of the motors A15 and B16 are respectively installed with symmetrically arranged swing frames 17, and the outer ends of the swing frames 17 extending to the inside of the grinding table 2 are installed with motors C19, and the output end of the motor C19 is installed with a clamping wheel 18 that fits the inner ring side of the bearing outer ring body 6, and the bearing outer ring body 6 is locked together by the positioning assembly and the locking assembly;

[0036] Reference Figure 4 and Figure 6 As shown, the middle part of a pair of bidirectional movable rings 5 ​​is provided with external threads 13, and the bidirectional movable rings 5 ​​are respectively sleeved with spiral rings 11 through the external threads 13. The outer ends of the spiral rings 11 are rotatably connected with the connecting rod 12 and the connecting rod 2 14. The outer ring side of the bidirectional movable ring 5 is provided with a driven rotating tooth 20. The outer side of the bidirectional movable ring 5 is provided with a driving assembly, and the driving assembly includes an active rotating tooth 10 meshing with the driven rotating tooth 20. A linkage rotating tooth 21 is installed at one end of the active rotating tooth 10, and the linkage rotating tooth 21 is meshed with a transmission rotating tooth 22 meshing with the driven rotating tooth 20.

[0037] Reference Figure 1 and Figure 6 As shown, the active rotating gear 10 and the linkage rotating gear 21 are coaxially arranged and have opposite spiral directions. The outer end of the active rotating gear 10 is provided with a connecting rotating rod 9, the outer end of the linkage rotating gear 21 is provided with an active rotating rod 8, the outer end of the active rotating rod 8 is provided with a motor D for driving the rotation thereof, and a shaft is fixedly provided at one end of the transmission rotating gear 22, and a rotating ring 7 is commonly provided between the ends of adjacent bidirectional moving rings 5. When the active rotating gear 10 rotates, it drives the bidirectional moving rings 5 ​​of the same group to perform opposite rotational motions;

[0038] A moving roller 4 is disposed inside the moving substrate 1 , and the bearing outer ring body 6 is horizontally moved by the moving roller 4 .

[0039] Basic principle: In the process of ultra-precision grinding of the outer ring of the deep groove ball bearing, the present invention uses the positioning component and the locking component in coordination, so that the outer ring of the deep groove ball bearing can achieve continuous feeding and stable clamping at different grinding depths in the continuous grinding process, avoiding excessive grinding and grinding restriction during the grinding process of the outer ring of the bearing;

[0040] Specifically, the outer ring body 6 of the bearing is horizontally ground and fed by the movable base plate 1. When it moves to the position of the grinding table 2, the bidirectional movable ring 5 is driven to rotate. The bidirectional movable ring 5 drives the folding angle between the connecting rod 12 and the connecting rod 2 14 to become smaller. At the same time, the motor A15 and the motor B16 are started synchronously, and drive the tightening wheels 18 on both sides to rotate to the inner side of the outer ring body 6 of the bearing to complete the tightening. That is, under the joint cooperation of the positioning component and the locking component, the effective positioning of the current outer ring body 6 of the bearing is completed;

[0041] After positioning, the surface of the outer ring 6 of the bearing is ultra-precision polished by the polishing equipment body 3 on the polishing table 2, and the tightening wheel 18 is rotated under the continuous starting rotation action of the motor C19. Combined with the displacement of the polishing equipment body itself, the surface of the outer ring 6 of the deep groove ball bearing is fully polished.

[0042] Embodiment 2: This embodiment optimizes the intelligent control process of the structural operation in Embodiment 1:

[0043] The control panel is built with a control system, which includes a diameter parameter acquisition terminal, a parameter analysis terminal, a tightening execution terminal and a processor that are communicatively connected. The diameter parameter acquisition terminal is used to acquire the sheet diameter value and the grinding feed value of the bearing outer ring body 6 during grinding, and send the sheet diameter value and the grinding feed value to the parameter analysis terminal;

[0044] The sheet diameter value includes the diameter measurement made with the outer surface of the bearing outer ring body 6 as the end, and the grinding feed value represents the difference between the aforementioned sheet diameter value and the current grinding allowance during the real-time grinding process, and both the sheet diameter value and the grinding feed value are measured by the photoelectric sensor and the camera.

[0045] The parameter analysis end receives the sheet diameter value and the grinding feed value and performs the following specific analysis: the sheet diameter value PZ and the grinding feed value MJ are calculated by the processor through the formula JX=a×PZ+b×MJ to obtain the radius reduction coefficient JX, and the radius reduction coefficient is compared with the radius reduction threshold preset in the processor to generate a control signal, and the control signal is sent to the tightening execution end to execute related actions;

[0046] The specific content of generating the control signal is as follows: when the diameter cutting coefficient is greater than or equal to the diameter cutting threshold, it means that the grinding allowance of the bearing outer ring body 6 in the current feed is within the controllable range, that is, the grinding device body 3 can complete its stable grinding according to its controllable stroke, and no signal is generated;

[0047] When the diameter cutting coefficient is less than the diameter cutting threshold, it means that the grinding allowance of the bearing outer ring body 6 in the current feed is out of control, that is, the grinding equipment will grind the bearing outer ring body 6 excessively during the grinding process, generating a control signal.

[0048] After the tightening execution end receives the control signal, the control motor D is started, and the motor D drives the active rotating rod 8 and the connecting rotating rod 9 to rotate, thereby driving the active rotating gear 10, the linkage rotating gear 21, and the transmission rotating gear 22 to complete synchronous rotation. At this time, the driven rotating gear 20 completes the opposite rotation action under the driving action of the active rotating gear 10 and the transmission rotating gear 22 rotating in different directions, and finally realizes that the spiral rings 11 outside the bidirectional moving ring 5 are separated from each other. At this time, when the tightening wheel 18 remains in the locked state, it will drive the outer ring body 6 of the bearing to move downward to avoid the problem of excessive grinding;

[0049] And synchronously, the control motor C19 is continuously started to drive the tightening wheel 18 to rotate, and the tightening wheel 18 rotating on both sides drives the outer ring body 6 of the bearing to rotate, and then combined with the displacement of the main body of the grinding equipment itself, the full-scale grinding of the surface of the outer ring body 6 of the deep groove ball bearing is completed;

[0050] Basic principle: This embodiment is combined with the first embodiment. Through the additional control system, the current grinding allowance can be effectively determined according to the relevant parameters of the outer ring of the deep groove ball bearing in the current continuous grinding process, and the current diameter cutting coefficient is further determined according to the parameter calculation. The diameter cutting coefficient is compared and analyzed with the diameter cutting threshold to obtain the position control action of the outer ring of the deep groove ball bearing, and finally the grinding amount of the outer ring of the deep groove ball bearing is accurately controlled during the grinding process to avoid the problem of excessive grinding.

[0051] Embodiment 3: This embodiment combines Embodiment 1 and Embodiment 2 to form the following method for ultra-finishing the outer ring of a deep groove ball bearing:

[0052] Step 1: The outer ring 6 of the bearing is horizontally ground and fed through the movable base plate 1. When it moves to the position of the grinding table 2, the bidirectional movable ring 5 is driven to rotate. The bidirectional movable ring 5 drives the folding angle between the connecting rod 12 and the connecting rod 2 14 to become smaller. At the same time, the motor A15 and the motor B16 are started synchronously, and drive the tightening wheels 18 on both sides to rotate to the inner side of the outer ring 6 of the bearing to complete the tightening. That is, under the joint cooperation of the positioning component and the locking component, the effective positioning of the current outer ring 6 of the bearing is completed;

[0053] Step 2: After positioning, the surface of the outer ring 6 of the bearing is ultra-precision polished by the polishing device body 3 on the polishing table 2, and the tightening wheel 18 is rotated under the continuous start-up rotation action of the motor C19, and combined with the displacement of the polishing device body itself, the surface of the outer ring 6 of the deep groove ball bearing is fully polished;

[0054] Step 3: In step 2, according to the surface parameters of the outer ring body 6 of the bearing obtained in real time, the current grinding allowance is effectively determined, and the current diameter cutting coefficient is further determined according to the parameter calculation, and the diameter cutting coefficient is compared and analyzed with the diameter cutting threshold to obtain the position control action of the outer ring of the deep groove ball bearing, and finally the grinding amount of the outer ring of the deep groove ball bearing is accurately controlled during the grinding process to avoid the problem of excessive grinding;

[0055] In summary: on the one hand, through the coordinated use of the positioning component and the locking component, the outer ring of the deep groove ball bearing can achieve continuous feeding and stable clamping at different grinding depths in the continuous grinding process, avoiding excessive grinding and limited grinding during the grinding of the outer ring of the bearing; on the other hand, through the additional control system, the current grinding allowance can be effectively determined according to the relevant parameters of the outer ring of the deep groove ball bearing in the current continuous grinding process, and the current diameter cutting coefficient can be further determined according to the parameter calculation, and the diameter cutting coefficient is compared and analyzed with the diameter cutting threshold to obtain the position control action of the outer ring of the deep groove ball bearing, and finally the precise control of the grinding amount of the outer ring of the deep groove ball bearing during the grinding process can be achieved.

[0056] The above formulas are obtained by collecting a large amount of data for software simulation and selecting a formula that is close to the actual value. The coefficients in the formula are set by technical personnel in this field according to actual conditions. The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, make equivalent replacement or change, which should be covered within the protection scope of the present invention.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods.

Claims

1. A deep groove ball bearing outer ring superfinishing machine, comprising a movable base plate (1), a grinding table (2) is mounted on one end of the movable base plate (1), a grinding device body (3) is arranged in the middle of the grinding table (2), and a control panel is embedded on the grinding table (2), characterized in that: A plurality of sets of bidirectional moving rings (5) threadedly connected to each other are suspended directly above the moving base plate (1), and a bearing outer ring body (6) is sleeved on the outside of the bidirectional moving rings (5) and mounted above the moving base plate (1); The outer part of the bidirectional movable ring (5) is sleeved with a position adjustment component, and the position adjustment component comprises a connecting rod 1 (12) and a connecting rod 2 (14) which are respectively threadedly sleeved on the outer part of the bidirectional movable ring (5), and the ends of the connecting rod 1 (12) and the connecting rod 2 (14) are hinged; The grinding table (2) is symmetrically provided with locking components on both sides, and the locking components include a motor A (15) and a motor B (16) symmetrically arranged on the outside of the grinding table (2), and the output ends of the motor A (15) and the motor B (16) are respectively installed with symmetrically arranged swing frames (17), and the outer ends of the swing frames (17) extending to the inside of the grinding table (2) are installed with a motor C (19), and the output end of the motor C (19) is installed with a clamping wheel (18) that fits with the inner ring side of the bearing outer ring body (6); the bearing outer ring body (6) is locked together by the positioning component and the locking component.

2. The deep groove ball bearing outer ring superfinishing machine according to claim 1, characterized in that: The middle parts of the pair of bidirectional movable rings (5) are both provided with external threads (13), and the bidirectional movable rings (5) are respectively sleeved with spiral rings (11) through the external threads (13), and the outer ends of the spiral rings (11) are rotatably connected to the first connecting rod (12) and the second connecting rod (14).

3. The deep groove ball bearing outer ring superfinishing machine according to claim 2, characterized in that: A driven rotating tooth (20) is arranged on the outer ring side of the bidirectional movable ring (5), and a driving assembly is arranged on the outer side of the bidirectional movable ring (5), wherein the driving assembly comprises an active rotating tooth (10) meshing with the driven rotating tooth (20), and a linkage rotating tooth (21) is installed at one end of the active rotating tooth (10), and the linkage rotating tooth (21) meshes with a transmission rotating tooth (22) meshing with the driven rotating tooth (20).

4. The deep groove ball bearing outer ring superfinishing machine according to claim 3, characterized in that: The active rotating tooth (10) and the linkage rotating tooth (21) are coaxially arranged and have opposite spiral directions. A connecting rotating rod (9) is installed at the outer end of the active rotating tooth (10), an active rotating rod (8) is installed at the outer end of the linkage rotating tooth (21), a motor D for driving the active rotating rod (8) to rotate is installed at the outer end of the active rotating rod (8), and a shaft is fixedly arranged at one end of the transmission rotating tooth (22).

5. The deep groove ball bearing outer ring superfinishing machine according to claim 4, characterized in that: A rotating ring (7) is commonly provided between the ends of the adjacent bidirectional movable rings (5), and when the active rotating teeth (10) rotate, they drive the bidirectional movable rings (5) of the same group to perform opposite rotational motions.

6. The deep groove ball bearing outer ring superfinishing machine according to claim 1, characterized in that: A moving roller (4) is arranged inside the moving substrate (1), and the bearing outer ring body (6) moves horizontally via the moving roller (4).

7. The deep groove ball bearing outer ring superfinishing machine according to claim 1, characterized in that: The control panel is built with a control system, which includes a diameter parameter acquisition end, a parameter analysis end, a tightening execution end and a processor that are communicatively connected. The diameter parameter acquisition end is used to acquire the sheet diameter value and the grinding feed value of the bearing outer ring (6) during grinding, and send the sheet diameter value and the grinding feed value to the parameter analysis end.

8. The deep groove ball bearing outer ring superfinishing machine according to claim 7, characterized in that: The parameter analysis end receives the sheet diameter value and the grinding feed value and performs the following specific analysis: the sheet diameter value and the grinding feed value are numerically calculated by the processor to obtain the radius cutting coefficient, and the radius cutting coefficient is compared with the radius cutting threshold preset in the processor to generate a control signal, and the control signal is sent to the tightening execution end to execute related actions.

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