Shaft workpiece grinding equipment

Abstract

The invention discloses grinding equipment for shaft workpieces, and relates to the technical field of grinding. The device specifically comprises a base, a clamping and fixing part used for clamping shaft parts is arranged on one side of the top of the base, a grinding part used for grinding spherical surfaces is arranged on the other side of the top of the base, and the grinding part comprises a support rotationally connected to the base through a rotating shaft and a grinding assembly arranged on the side wall of the top of the support; the grinding assembly comprises a grinding wheel, a first electromagnet and a second electromagnet, the first electromagnet and the second electromagnet are matched with each other, and a wheel frame is fixed to the outer wall of the grinding wheel and slidably connected to the support through a sliding rod. Parts are clamped by arranging the chucks in the circular array, it is guaranteed that the axis positions of the parts with different diameters are the same after the parts with different diameters are clamped while the parts with different diameters can be clamped, and therefore follow-up grinding and positioning are facilitated, and the grinding precision is improved.

Description

[0001] This application is a divisional application of the application filed on September 18, 2024, with application number 202411298704.1 and invention name “A kind of end grinding processing equipment for shaft workpieces”. Technical Field

[0002] The invention relates to the technical field of grinding processing, and in particular to a grinding processing device for shaft workpieces. Background Art

[0003] In the process of machining shaft parts, grinding equipment is often used to grind shaft parts. For some shaft parts with special functions, it is necessary to machine the end surface of the shaft parts into a circle, such as a universal ball head. The end face circle is usually machined by lathe to turn out a circular contour, and then the circle is ground to ensure its surface flatness.

[0004] After searching, the Chinese patent publication number CN218461739U is a patent for a grinding device for shaft processing, including a workbench, a first vertical plate is fixedly installed on one side of the upper surface of the workbench, and a second vertical plate is slidably connected to the other side of the upper surface of the workbench, and the first vertical plate and the second vertical plate are provided with fixed blocks on the opposite sides. The shaft to be processed is clamped and fixed by the first vertical plate and the second vertical plate, which is convenient for adjustment and saves labor hours. The electric slide is provided to facilitate the sliding of the grinding plate. When the motor drives the shaft workpiece to rotate, the elastic component is used to make the grinding plate fit and grind the surface of the shaft workpiece.

[0005] The above patent has the following shortcomings: since the end faces of shaft parts cannot be polished well during grinding, the relative speeds of the grinding wheel and different spherical surfaces are different when they contact each other. If the rotation speed of the grinding wheel along the center of the sphere is constant, the grinding of shaft parts will be uneven, which may easily cause the spherical surface at the end of the shaft parts to be out of round.

[0006] To this end, the present invention provides a shaft workpiece grinding processing equipment. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a grinding processing equipment for shaft workpieces.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A shaft workpiece grinding processing equipment, comprising a base, A clamping and fixing part for clamping shaft parts is arranged on one side of the top of the base, and a grinding part for grinding the spherical surface is arranged on the other side of the top of the base, wherein the grinding part comprises a bracket rotatably connected to the base through a rotating shaft and a grinding assembly arranged on the top side wall of the bracket; The bottom outer wall of the base is fixed with a motor 1 by bolts, the output shaft of the motor 1 is connected to the bottom outer wall of the rotating shaft by a coupling, and the top outer wall of the base is fixed with an arc-shaped resistor coinciding with the axis of the rotating shaft, and the bottom of the bracket is provided with a spring ball electrode in contact with and rolling with the arc-shaped resistor; The motor, the arc resistor and the spring ball electrode are connected in series to a circuit containing a power supply.

[0009] Preferably: the grinding assembly includes a grinding wheel and electromagnet 1 and electromagnet 2 that cooperate with each other, the outer wall of the grinding wheel is fixed with a wheel frame, the wheel frame is slidably connected to the bracket through a sliding rod, and the electromagnet 1 is fixed to the outer wall of the sliding rod, and the electromagnet 2 is fixed to the side wall of the bracket.

[0010] Furthermore: the magnetic poles of the electromagnet 1 and the electromagnet 2 on the opposite side are the same.

[0011] On the basis of the above-mentioned solution: the polishing part further includes an automatic reversing component fixed to the top outer wall of the base and a paddle fixed to the bottom outer wall of the bracket and cooperating with the automatic reversing component.

[0012] A better solution among the above solutions is: the automatic reversing component includes a "U"-shaped cylinder body and an I-shaped plug slidably fitted at both ends of the "U"-shaped cylinder body, the outer end surface of the "U"-shaped cylinder body is fixed with an electrode 1B, the inner end surface of the I-shaped plug is fixed with an electrode 1A matching with electrode 1B, and the inner cavity of the "U"-shaped cylinder body is filled with fluid medium.

[0013] As a further solution of the present invention: the two groups of electrode 1A and electrode 1B are electrically connected to the circuit of motor 1, and the wiring methods of the two groups of electrode 1A and electrode 1B are different, which respectively control the two directions of motor 1.

[0014] At the same time, the clamping and fixing part includes a fixing ring fixed to the top of the base through a support plate, at least three groups of chucks arranged in a circular array on the side wall of the fixing ring, and a driving component arranged outside the fixing ring and used to drive the chucks.

[0015] As a preferred embodiment of the present invention: the chuck includes two symmetrical sliders which are slidably connected to both sides of the fixing ring, both sides of the sliders are rotatably connected with clamping wheels, and one group of the chuck's sliders have inner side walls fixed with a dual-axis motor by bolts, and the output shaft of the dual-axis motor is fixedly connected to the clamping wheel.

[0016] At the same time, the driving assembly includes a transition ring rotatably connected to the outer wall of the fixed ring and a plurality of inclined grooves opened on the inner wall of the transition ring, and the sliding block is movably limited and matched with the inner wall of the inclined groove through a limiting column.

[0017] As a better solution of the present invention: the driving assembly also includes a force ring, which is rotatably connected to the outer wall of the transition ring, and the inner wall of the force ring is fixed with a block by bolts, and an electrode 2 B is fixed to the outer wall of one side of the block, and an electrode 2 A that cooperates with electrode 2 B is fixed to the side wall of the transition ring opposite to electrode 2 B, and electrode 2 A and electrode 2 B are electrically connected to the power supply circuit of the dual-axis motor.

[0018] The beneficial effects of the present invention are: 1. The present invention, by configuring the grinding assembly as a combination of a grinding wheel, an electromagnet 1 and an electromagnet 2, can, on the one hand, realize axial positioning of the parts by utilizing the fit between the electromagnet 1 and the electromagnet 2 in the loading step; on the other hand, during the grinding process, the grinding pressure can be controlled by controlling the current of the electromagnet 1 and the electromagnet 2, thereby increasing the grinding effect.

[0019] 2. The present invention controls the rotation speed of the grinding assembly by utilizing motor 1, and realizes power control of motor 1 by cooperating with the spring ball electrode and the arc resistor, so that when the grinding assembly grinds the part with a larger rotation speed of the spherical surface, its rotation speed is faster, and vice versa, it is slower, thereby ensuring the uniformity of grinding and preventing the spherical surface from losing its roundness, and the whole process is also automatically controlled.

[0020] 3. The present invention, by setting an automatic reversing component, uses two groups of electrode 1 A and electrode 1 B with different wiring methods to respectively control the direction of motor 1, and then uses the characteristic that the paddle moves with the bracket to realize the automatic reversing function of motor 1. Therefore, for working conditions that require cyclic grinding, no manual or algorithm control is required. In addition, the two groups of I-type plugs are linked by a fluid medium, so that the two groups of I-type plugs can be synchronously controlled.

[0021] 4. The present invention adds a force ring, uses an elastomer to connect the force ring and the transition ring, and arranges electrode 2 A and electrode 2 B on this basis, so that on the one hand, the clamping force can be controlled to prevent parts from being clamped, and on the other hand, the dual-axis motor can be started only when and only when a stable clamping force is applied to the parts, thereby preventing the safety hazard caused by the dual-axis motor starting when the parts are not stably clamped, thereby increasing the operating safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 2 A schematic diagram of the structure of a grinding part of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 3 A schematic cross-sectional structure diagram of a grinding assembly of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 4This is a schematic cross-sectional structure diagram of an automatic reversing assembly of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 5 This is a schematic diagram of the structure of the clamping and fixing part of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 6 A schematic diagram of the cross-sectional structure of a chuck of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 7 This is a schematic cross-sectional structure diagram of a clamping and fixing part of a shaft workpiece grinding processing equipment proposed by the present invention; Figure 8 The present invention provides a partial cross-sectional structural schematic diagram of a shaft workpiece grinding processing equipment proposed by the present invention.

[0023] In the figure: 1. base; 2. clamping and fixing part; 3. grinding part; 4. automatic reversing assembly; 5. motor 1; 6. rotating shaft; 7. arc resistor; 8. spring ball electrode; 9. bracket; 10. grinding assembly; 11. grinding wheel; 12. wheel frame; 13. electromagnet 1; 14. electromagnet 2; 15. slide bar; 16. paddle plate; 17. electrode 1A; 18. electrode 1B; 19. I-type plug; 20. fluid medium; 21. "U"-shaped cylinder; 22. support plate; 23. chuck; 24. driving assembly; 25. fixing ring; 26. dual-axis motor; 27. slider; 28. clamping wheel; 29. ​​transition ring; 30. limiting column; 31. inclined groove; 32. electrode 2A; 33. electrode 2B; 34. stopper; 35. force ring; 36. elastic body; 37. motor 2; 38. gear; 39. power supply. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Example 1

[0026] A shaft workpiece grinding equipment, such as Figure 1-8 As shown, it includes a base 1, and a clamping and fixing part 2 for clamping shaft parts is arranged on one side of the top of the base 1, and a grinding part 3 for grinding the spherical surface is arranged on the other side of the top of the base 1. The grinding part 3 includes a bracket 9 rotatably connected to the base 1 through a rotating shaft 6 and a grinding assembly 10 arranged on the top side wall of the bracket 9.

[0027] The bottom outer wall of the base 1 is fixed with a motor 5 by bolts, the output shaft of the motor 5 is connected to the bottom outer wall of the rotating shaft 6 by a coupling, and the top outer wall of the base 1 is fixed with an arc resistor 7 that coincides with the axis of the rotating shaft 6, and the bottom of the bracket 9 is provided with a spring ball electrode 8 that contacts and rolls with the arc resistor 7.

[0028] The motor 1 5 , the arc resistor 7 and the spring ball electrode 8 are connected in series to a circuit containing a power source 39 .

[0029] When the device is in use, the clamping and fixing part 2 is used to clamp the part and drive the part to rotate. At this time, the motor 5 is started, and it drives the bracket 9 to rotate through the rotating shaft 6, so that the grinding component 10 moves on the spherical surface to achieve the grinding effect, and while the bracket 9 rotates, the matching position of the spring ball electrode 8 and the arc resistor 7 changes, so that the resistance of the arc resistor 7 connected to the motor 5 circuit changes, so that the voltage division of the motor 5 changes, so that the speed of the motor 5 changes, so that the moving speed of the grinding component 10 relative to the spherical surface changes, and the larger the part of the spherical surface that the grinding component 10 grinds, the faster its rotation speed is. It should be noted that the matching principle of the arc resistor 7 and the spring ball electrode 8 is the same as the principle of the sliding rheostat in the prior art. The speed of the motor 5 is changed by making the spring ball electrode 8 at different positions on the arc resistor 7. Because the principle of the sliding rheostat is to adjust the speed of the motor 5 by changing the resistance, it is common knowledge among technicians in this field and will not be elaborated here.

[0030] This device controls the rotation speed of the grinding component 10 by using the motor 5, and then realizes the power control of the motor 5 through the cooperation of the spring ball electrode 8 and the arc resistor 7, so that when the grinding component 10 grinds the part with a larger rotation speed of the spherical surface, its rotation speed is faster, and vice versa, it is slower, thereby ensuring the uniformity of grinding and preventing the spherical surface from losing its roundness, and the whole process is also automatically controlled.

[0031] In order to solve the grinding problem; Figure 3 As shown, the grinding assembly 10 includes a grinding wheel 11 and an electromagnet 13 and an electromagnet 2 14 that cooperate with each other. A wheel frame 12 is fixed to the outer wall of the grinding wheel 11. The wheel frame 12 is slidably connected to the bracket 9 through a slide rod 15, and the electromagnet 13 is fixed to the outer wall of the slide rod 15, and the electromagnet 2 14 is fixed to the side wall of the bracket 9. The magnetic poles of the electromagnet 13 and the electromagnet 2 14 on the opposite side are the same.

[0032] When it is in the step of loading the part, the electromagnet 1 13 and the electromagnet 2 14 are powered off. At this time, the spherical surface of the part squeezes the grinding wheel 11 so that the electromagnet 1 13 and the electromagnet 2 14 fit together to complete the axial positioning of the part. During grinding, the electromagnet 1 13 and the electromagnet 2 14 are powered on, which generate mutual repulsion, thereby using the repulsion force to provide grinding pressure, and the grinding pressure can be controlled by controlling the current of the electromagnet 1 13 and the electromagnet 2 14.

[0033] The device, by configuring the grinding assembly 10 as a combination of a grinding wheel 11, an electromagnet 13, and an electromagnet 2 14, can, on the one hand, realize axial positioning of the parts by utilizing the fit between the electromagnet 13 and the electromagnet 2 14 in the loading step, and on the other hand, can control the grinding pressure by controlling the current of the electromagnet 13 and the electromagnet 2 14 during the grinding process, thereby increasing the grinding effect.

[0034] In order to solve the commutation problem; Figure 2 , 4 As shown, the grinding part 3 further includes an automatic reversing component 4 fixed to the top outer wall of the base 1 and a paddle 16 fixed to the bottom outer wall of the bracket 9 and cooperating with the automatic reversing component 4 .

[0035] The automatic reversing component 4 includes a "U"-shaped cylinder body 21 and an I-shaped plug 19 that slides on both ends of the "U"-shaped cylinder body 21. The outer end surface of the "U"-shaped cylinder body 21 is fixed with an electrode B18, and the inner end surface of the I-shaped plug 19 is fixed with an electrode A17 that matches the electrode B18. The inner cavity of the "U"-shaped cylinder body 21 is filled with a fluid medium 20.

[0036] The two groups of electrodes A17 and B18 are electrically connected to the circuit of the motor 5 , and the wiring methods of the two groups of electrodes A17 and B18 are different, which respectively control the two directions of the motor 5 .

[0037] When the bracket 9 rotates, it will drive the paddle 16 to rotate synchronously until it rotates to the required grinding angle. The paddle 16 will collide with the end face of the I-shaped plug 19, causing the group of I-shaped plugs 19 to move toward the inside of the "U"-shaped cylinder 21, thereby causing the electrode 117 to contact the electrode 118. At the same time, the force is transmitted through the fluid medium 20, causing another group of I-shaped plugs 19 to move outward, and the electrode 117 in the group is separated from the electrode 118, thereby realizing the steering switch of the motor 5.

[0038] This device, by setting an automatic reversing component 4, uses two groups of electrodes A17 and B18 with different wiring methods to control the direction of the motor 5 respectively, and then uses the characteristics of the paddle 16 moving with the bracket 9 to realize the automatic reversing function of the motor 5, so that for the working conditions that require cyclic grinding, no manual or algorithm control is required. In addition, the two groups of I-type plugs 19 are linked through the fluid medium 20, so that the synchronization control of the two groups of I-type plugs 19 can be realized. It should be noted that there are two groups of electrode A17 and electrode B18, and the left and right groups of electrode A17 and electrode B18 are opposite to the wiring method of the motor 5, and the two groups of I-type plugs 19 are both made of insulating materials. When located on the left side (see Figure 4 ) when the electrode A17 and the electrode B18 on the left side are in contact, the circuit of the electrode A17 and the electrode B18 on the left side will be connected, and the circuit of the electrode A17 and the electrode B18 on the right side will be disconnected, so that the motor 5 can rotate forward. Similarly, when the circuit of the electrode A17 and the electrode B18 on the right side is connected, the motor 5 can be reversed.

[0039] When the present embodiment is in use, the clamping and fixing part 2 is used to clamp the part and drive the part to rotate. At this time, the motor 5 is started, and it drives the bracket 9 to rotate through the rotating shaft 6, so that the grinding component 10 moves on the spherical surface to achieve the grinding effect, and while the bracket 9 rotates, the matching position of the spring ball electrode 8 and the arc resistor 7 changes, so that the resistance of the arc resistor 7 connected to the motor 5 circuit changes, so that the partial voltage of the motor 5 changes, so that the rotation speed of the motor 5 changes, so that the moving speed of the grinding component 10 relative to the spherical surface changes, and the larger the part of the spherical surface that the grinding component 10 grinds, the faster its rotation speed is, and when it is in the loading step of the part, the electromagnet 13 and the electromagnet 2 14 are powered off, and at this time the spherical surface of the part squeezes the grinding wheel 11 to make The electromagnet 13 and the electromagnet 2 14 are fitted together to complete the axial positioning of the part. During grinding, the electromagnet 13 and the electromagnet 2 14 are energized to generate mutual repulsion, thereby using the repulsion to provide grinding pressure, and the grinding pressure can be controlled by controlling the current of the electromagnet 13 and the electromagnet 2 14. At the same time, when the bracket 9 rotates, it will drive the paddle 16 to rotate synchronously until it rotates to the required grinding angle. The paddle 16 will collide with the end face of the I-shaped plug 19, so that the group of I-shaped plugs 19 moves toward the inside of the "U"-shaped cylinder body 21, so that the electrode 1 A17 contacts the electrode 1 B18, and at the same time, the force is transmitted through the fluid medium 20, so that the other group of I-shaped plugs 19 moves outward, and the electrode 1 A17 and the electrode 1 B18 in the group are separated, realizing the steering switch of the motor 5. Example 2

[0040] A shaft workpiece grinding equipment, such as Figure 5-8As shown, in order to solve the clamping and driving problems; this embodiment makes the following improvements on the basis of embodiment 1: the clamping and fixing part 2 includes a fixing ring 25 fixed to the top of the base 1 through a support plate 22, at least three groups of chucks 23 arranged in a circular array on the side wall of the fixing ring 25, and a driving assembly 24 arranged on the outside of the fixing ring 25 and used to drive the chuck 23.

[0041] The chuck 23 includes two symmetrical sliders 27 which are slidably connected to the two sides of the fixing ring 25, and the two sides of the sliders 27 are rotatably connected to the clamping wheels 28. In addition, a dual-axis motor 26 is fixed to the inner wall of the sliders 27 of one group of the chuck 23 by bolts, and the output shaft of the dual-axis motor 26 is fixedly connected to the clamping wheel 28.

[0042] The driving assembly 24 includes a transition ring 29 rotatably connected to the outer wall of the fixing ring 25 and a plurality of inclined grooves 31 opened on the inner wall of the transition ring 29 . The slider 27 is movably limited and engaged with the inner wall of the inclined groove 31 through a limiting column 30 .

[0043] When the transition ring 29 rotates, it can make the limit column 30 drop through the cooperation of the inclined groove 31 and the limit column 30, thereby making the slider 27 drop until the clamping wheel 28 contacts the outer surface of the part. Then the dual-axis motor 26 starts, driving the clamping wheel 28 to rotate, thereby driving the part to rotate.

[0044] The device clamps the parts by setting a circular array of chucks 23, and multiple groups of chucks 23 are driven by a transition ring 29, so that the movements of the multiple groups of chucks 23 can be synchronized, ensuring that parts of different diameters can be clamped and the axial positions of parts of different diameters are the same after clamping, thereby facilitating subsequent grinding and positioning and improving grinding accuracy.

[0045] To address security issues, such as Figure 7 As shown, the driving assembly 24 also includes a force ring 35, which is rotatably connected to the outer wall of the transition ring 29, and the inner wall of the force ring 35 is fixed with a stopper 34 by bolts, and an electrode 2 B33 is fixed to an outer wall on one side of the stopper 34, and an electrode 2 A32 that cooperates with the electrode 2 B33 is fixed to the side wall of the transition ring 29 opposite to the electrode 2 B33, and the electrode 2 A32 and the electrode 2 B33 are electrically connected to the power supply circuit of the dual-axis motor 26.

[0046] When the force ring 35 rotates counterclockwise, it can drive the transition ring 29 to rotate through the elastic body 36 until the transition ring 29 rotates to the point where the clamping wheel 28 contacts the surface of the part. At this time, the force ring 35 continues to rotate, and the elastic body 36 deforms to provide a clamping force. At the same time, after the force ring 35 and the transition ring 29 rotate relative to each other, the relative positions of the electrode 2 A32 and the electrode 2 B33 change, until the electrode 2 A32 and the electrode 2 B33 contact each other, and then the dual-axis motor 26 can be started to drive the part to rotate.

[0047] The device adds a force ring 35, uses an elastic body 36 to connect the force ring 35 and the transition ring 29, and arranges an electrode A32 and an electrode B33 on this basis, so that on the one hand, the clamping force can be controlled to prevent parts from being clamped, and on the other hand, the dual-axis motor 26 can be started only when and only when a stable clamping force is applied to the parts, thereby preventing the safety hazard caused by the dual-axis motor 26 starting when the parts are not stably clamped, thereby increasing the operating safety of the device.

[0048] To solve driver problems, such as Figure 8 As shown, the driving assembly 24 also includes a second motor 37, and the second motor 37 is fixed to the side wall of the support plate 22 by bolts. The output shaft of the second motor 37 is connected to a gear 38 by a key, and the gear 38 is engaged with the outer wall of the force ring 35; when the second motor 37 is started, it can drive the gear 38 to rotate, thereby driving the force ring 35 to rotate. It should be noted that the second motor 37 is a self-locking motor. When the force ring 35 is driven to rotate to a specified position, the force ring 35 can be positioned to avoid the situation where the parts are positioned loose due to the reversal of the force ring 35.

[0049] When the present embodiment is in use, when the second motor 37 is started, it can drive the gear 38 to rotate, thereby driving the force ring 35 to rotate. When the force ring 35 rotates, it can drive the transition ring 29 to rotate through the elastic body 36. When the transition ring 29 rotates, it can make the limit column 30 drop through the cooperation of the inclined groove 31 and the limit column 30, thereby making the slider 27 drop, until the clamping wheel 28 contacts the outer surface of the part, the dual-axis motor 26 is started, driving the clamping wheel 28 to rotate, thereby driving the part to rotate. At this time, the force ring 35 continues to rotate, and the elastic body 36 will deform, thereby providing clamping force. At the same time, after the force ring 35 and the transition ring 29 rotate relative to each other, the relative position of the electrode 2 A32 and the electrode 2 B33 changes, until the electrode 2 A32 and the electrode 2 B33 are in relative contact, the dual-axis motor 26 can be started to drive the part to rotate.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shaft workpiece grinding processing device, comprising a base (1), characterized in that: A clamping and fixing portion (2) for clamping shaft parts is provided on one side of the top of the base (1), and a grinding portion (3) for grinding a spherical surface is provided on the other side of the top of the base (1), wherein the grinding portion (3) comprises a bracket (9) rotatably connected to the base (1) via a rotating shaft (6) and a grinding assembly (10) provided on a top side wall of the bracket (9); The polishing part (3) further comprises an automatic reversing component (4) fixed to the top outer wall of the base (1) and a paddle (16) fixed to the bottom outer wall of the bracket (9) and cooperating with the automatic reversing component (4); The grinding assembly (10) comprises a grinding wheel (11) and an electromagnet 1 (13) and an electromagnet 2 (14) which cooperate with each other, a wheel frame (12) being fixed to the outer wall of the grinding wheel (11), the wheel frame (12) being slidably connected to the bracket (9) via a sliding rod (15), the electromagnet 1 (13) being fixed to the outer wall of the sliding rod (15), and the electromagnet 2 (14) being fixed to the side wall of the bracket (9); A motor (5) is fixed to the bottom outer wall of the base (1) by bolts, the output shaft of the motor (5) is connected to the bottom outer wall of the rotating shaft (6) by a coupling, and an arc-shaped resistor (7) that coincides with the axis of the rotating shaft (6) is fixed to the top outer wall of the base (1), and a spring ball electrode (8) that contacts and rolls with the arc-shaped resistor (7) is provided at the bottom of the bracket (9); The motor 1 (5), the arc resistor (7) and the spring ball electrode (8) are connected in series to a circuit containing a power source (39); The clamping and fixing portion (2) comprises a fixing ring (25) fixed to the top of the base (1) via a support plate (22), at least three groups of clamps (23) arranged in a circular array on the side wall of the fixing ring (25), and a driving assembly (24) arranged on the outside of the fixing ring (25) and used to drive the clamps (23).

2. The shaft workpiece grinding equipment according to claim 1, characterized in that: The chuck (23) comprises two symmetrical sliders (27) respectively slidably connected to two sides of the fixing ring (25), and the two sides of the sliders (27) are rotatably connected to the clamping wheels (28), and a double-axis motor (26) is fixed to the inner side wall of the sliders (27) of one group of the chucks (23) by bolts, and the output shaft of the double-axis motor (26) is fixedly connected to the clamping wheel (28).

3. The shaft workpiece grinding equipment according to claim 1, characterized in that: The magnetic poles of the electromagnet 1 (13) and the electromagnet 2 (14) on the opposite side are the same.

4. The shaft workpiece grinding equipment according to claim 2, characterized in that: The driving assembly (24) comprises a transition ring (29) rotatably connected to the outer wall of the fixing ring (25) and a plurality of inclined grooves (31) formed on the inner wall of the transition ring (29), and the sliding block (27) is movably limited and engaged with the inner wall of the inclined groove (31) via a limiting column (30).

5. The shaft workpiece grinding equipment according to claim 4, characterized in that: The driving assembly (24) further comprises a force ring (35), wherein the force ring (35) is rotatably connected to the outer wall of the transition ring (29), and a stopper (34) is fixed to the inner wall of the force ring (35) by means of bolts, an electrode 2 B (33) is fixed to one outer wall of the stopper (34), and an electrode 2 A (32) matching with the electrode 2 B (33) is fixed to the side wall of the transition ring (29) opposite to the electrode 2 B (33), and the electrode 2 A (32) and the electrode 2 B (33) are electrically connected to the power supply circuit of the dual-axis motor (26).

6. The shaft workpiece grinding equipment according to claim 5, characterized in that: The automatic reversing assembly (4) comprises a "U"-shaped cylinder body (21) and an I-shaped plug (19) slidably fitted at both ends of the "U"-shaped cylinder body (21); an electrode B (18) is fixed to the outer end surface of the "U"-shaped cylinder body (21); an electrode A (17) matching with the electrode B (18) is fixed to the inner end surface of the I-shaped plug (19); and a fluid medium (20) is injected into the inner cavity of the "U"-shaped cylinder body (21).

7. The shaft workpiece grinding equipment according to claim 6, characterized in that: The two sets of electrodes 1A (17) and electrodes 1B (18) are electrically connected to the circuit of the motor 1 (5), and the wiring methods of the two sets of electrodes 1A (17) and electrodes 1B (18) are different, and they respectively control the two directions of rotation of the motor 1 (5).

Images