A welding spot grinding device for axle processing

Abstract

A welding spot grinding device for axle processing relates to the technical field of grinding and polishing of mechanical parts, and comprises a grinding workbench, which is a horizontally arranged square table, and is respectively provided with a transfer clamping component, a rotation drive component, a lifting rough grinding component and a rolling polishing component. The invention solves the problems that the axle clamping and transfer is inconvenient, the grinding method is single and affects the grinding effect, and the grinding adaptability is poor when the grinding equipment in the traditional technology is used to grind and trim the welding spots of the axle.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and polishing of mechanical parts, and in particular to a welding point grinding device for axle processing. Background Art

[0002] The agricultural machinery drive axle is a device on agricultural machinery used to transmit the driving force from the engine to the driving wheels, achieving the effect of reducing speed and increasing torque, while changing the direction of power transmission.

[0003] Similar to ordinary automobile axles, agricultural machinery axles also structurally include an intermediate axle housing and half-axle sleeves on both sides. Most agricultural machinery axles use assembly welding to connect the half-axle sleeves to the intermediate axle housing. After assembly welding, the axles often need to be sprayed with anti-corrosion paint and strength tested.

[0004] Due to the limitation of welding technology, a large number of solder joints are usually generated on the outer surface of the axle after welding. The quality requirements for solder joints usually include good electrical contact, firm mechanical contact and beautiful appearance. Beautiful appearance refers to the smooth transition between the solder and the weldment, without cracks, pinholes and slag inclusions. Furthermore, good solder joints are also conducive to the subsequent anti-corrosion spraying process. In order to obtain good solder joints and improve the appearance, it is usually necessary to perform finishing grinding on the solder joints after welding. Compared with the surface grinding of ordinary components, the special shape of the axle leads to a series of problems when using existing grinding equipment to grind its surface, including:

[0005] 1. Inconvenient clamping and transfer. Specifically, the special shape of the axle and the large number of welding points will lead to difficulties in selecting the clamping method and clamping position, and the long length of the welded axle will lead to the inconvenience of transferring the axle between multiple grinding and processing stations.

[0006] 2. The grinding method is single and the grinding effect is poor. Specifically, the use of a simple grinding method will make it difficult to achieve high-quality surface aesthetics requirements such as smoothness and crack-free for the grinding of the axle welding points, affecting the grinding effect.

[0007] 3. The grinding adaptability of multiple welding points on different types of axles is poor, resulting in low grinding efficiency. Specifically, when grinding different welding points on different types of axles, due to the limitations of the grinding mechanism, the axles need to be manually adjusted frequently, which prolongs the grinding process time and reduces the processing efficiency.

[0008] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0009] In view of the defects in the prior art, the present invention provides a weld point grinding device for axle processing, which is used to solve the problems of inconvenient axle clamping and transfer, single grinding method affecting the grinding effect and poor grinding adaptability when the grinding equipment in the traditional technology grinds and trims the axle assembly weld points.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A welding spot grinding device for axle processing comprises a grinding workbench, which is a horizontally arranged square table. A transfer clamping component, a rotating drive component, a lifting rough grinding component and a rolling polishing component are respectively arranged on the grinding workbench. A laterally extending sliding clamping opening is opened on the upper surface of the grinding workbench.

[0012] As an optimized solution, two symmetrical sliding avoidance openings are opened in the middle of the upper surface of the grinding workbench along the longitudinal direction, and a telescopic storage opening is opened on each longitudinal side end face of the grinding workbench, and the telescopic storage opening is connected to the sliding avoidance opening.

[0013] As an optimized solution, the rotating drive assembly includes two symmetrically arranged extension slides, and the two extension slides are respectively slidably arranged in the two telescopic receiving openings. A horizontal extension telescopic cylinder is fixedly connected to the longitudinal side wall of each telescopic receiving opening, and the telescopic end of the extension telescopic cylinder is fixedly connected to the side end surface of the extension slide.

[0014] As an optimized solution, the upper surface of each extension slide is fixedly connected with a lifting and telescopic cylinder, the upper telescopic end of the lifting and telescopic cylinder is fixedly connected with a rotating positioning seat, the center of the outer end surface of the rotating positioning seat is fixedly connected with a rotating drive motor, and the end of the output shaft of the rotating drive motor passes through the rotating positioning seat and is fixedly connected to a top support turntable.

[0015] As an optimized solution, the rolling polishing assembly is provided with two groups, and the polishing workbench is provided with four limiting slide grooves. Each group of the rolling polishing assembly includes two symmetrically arranged sliding bases, and the two sliding bases are respectively slidably mounted in the two laterally opposite limiting slide grooves.

[0016] As an optimized solution, a motor mounting plate is fixedly connected in each of the limiting slide grooves, a sliding drive motor is fixedly connected to the outer wall of the motor mounting plate, the end of the output shaft of the sliding drive motor passes through the motor mounting plate and is fixedly connected to a horizontal threaded screw, the end of the threaded screw is rotatably supported on the transverse inner wall of the limiting slide groove, and the threaded screw passes through and is threadedly connected to the sliding base.

[0017] As an optimized solution, a vertical hydraulic telescopic cylinder is fixedly connected to the upper surface of each sliding base, and the upper telescopic end of the hydraulic telescopic cylinder is fixedly connected to an L-shaped mounting seat, and a rolling drive motor is fixedly connected to the vertical outer wall of the L-shaped mounting seat. The end of the output shaft of the rolling drive motor passes through the L-shaped mounting seat and is fixedly connected to a driving roller, and a rolling polishing belt is sleeved between the two laterally opposite driving rollers, and the inner and outer rings of the rolling polishing belt have different surface roughnesses.

[0018] As an optimized solution, the transfer clamping assembly includes a horizontally arranged movable seat, and the movable seat is clamped and limited in the sliding clamping opening.

[0019] As an optimized solution, a steering drive motor is fixedly connected to the center of the lower surface of the moving seat, the end of the output shaft of the steering drive motor passes upward through the moving seat and is fixedly connected to a U-shaped clamping seat, and two symmetrical clamping telescopic cylinders are fixedly connected to the inner side wall of the vertical part of the U-shaped clamping seat, and the telescopic end of each clamping telescopic cylinder is respectively fixedly connected to a clamping positioning plate.

[0020] As an optimized solution, a displacement drive motor is fixedly connected to each lateral side end face of the grinding workbench, and the end of the output shaft of each displacement drive motor passes through the grinding workbench and is fixedly connected to a drive threaded rod. Two drive threaded rods are arranged in parallel on both sides of the steering drive motor, and the end of each drive threaded rod is rotatably supported on the lateral inner wall of the sliding card mounting port, and the two drive threaded rods pass through and are threadedly connected to the moving seat.

[0021] As an optimized solution, the lifting rough grinding assembly includes two symmetrically arranged lifting grinding seats, the two lifting grinding seats are arranged on both sides of the sliding card mounting port, the lifting grinding seat is a square seat, and the upper surface of the lifting grinding seat is an arc-shaped concave setting.

[0022] As an optimized solution, the upper surface of the grinding workbench is provided with an installation groove corresponding to each of the lifting and grinding seats, and a vertical electric telescopic cylinder is fixed in each of the installation grooves, and the upper telescopic end of the electric telescopic cylinder is fixed to the lower surface of the lifting and grinding seat.

[0023] As an optimized solution, two groups of rolling polishing assemblies are arranged on both sides of the sliding clamping port and are alternately arranged with the two lifting polishing seats.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The transfer clamping assembly provided in the present invention can realize adaptive clamping during the grinding process of the vehicle axle, and realize the continuous transfer of the axle being clamped between different processing stations. Specifically, a U-shaped clamping seat is provided in the transfer clamping assembly, and the clamping positioning plate telescopically provided on the U-shaped clamping seat can clamp the middle bridge shell part of the vehicle axle, and the U-shaped clamping seat is rotatably installed on the moving seat, and can be rotated under the control of the steering drive motor to convert the clamped vehicle axle from the horizontal loading state to the longitudinal grinding state; further, the moving seat can slide horizontally along the sliding clamping port under the drive of the displacement drive motor, and switch between multiple stations such as loading clamping, rough grinding, and fine polishing.

[0026] The rotating drive assembly provided in the present invention can rotate and drive the axle in a fixed clamping state, thereby changing the welding spot trimming position in real time and realizing circumferential grinding processing; further, by controlling the extension and contraction of the extension and telescopic cylinder, the clamping distance between the two top support turntables can be adjusted to adapt to the adaptive clamping of axles of different models and lengths, and by synchronously controlling the extension and contraction of the extension and telescopic cylinder, the overall longitudinal movement of the axle can be driven, thereby adjusting the grinding position of multiple welding spots; in addition, by controlling the extension and contraction of the hydraulic telescopic cylinder, the rotating drive height can be adjusted, thereby realizing avoidance of the processing mechanism during the processing.

[0027] The lifting rough grinding assembly provided in the present invention can control the electrically controlled telescopic cylinder to make the lifting grinding seat close to the rotating vehicle axle, thereby performing rough grinding processing on the welding points on the outer wall of the vehicle axle.

[0028] The rolling polishing assembly provided in the present invention can perform secondary polishing on the welding points on the surface of the axle after the rough grinding process is completed, so as to improve the surface smoothness of the polished part. Specifically, the rolling polishing assembly includes a rolling polishing belt that rotates cyclically, and the inner and outer ring surfaces of the rolling polishing belt have different roughness, which can achieve polishing effects with different fineness; further, the rolling polishing belt can change the polishing state by sliding the sliding base and extending and retracting the hydraulic telescopic cylinder, so that the inner ring surface or the outer ring surface of the rolling polishing belt is close to the outer surface of the polishing position of the axle, thereby increasing the polishing contact area and improving the polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0030] Figure 1 It is a schematic cross-sectional view of the internal structure of each component in the present invention in a top view direction;

[0031] Figure 2 It is a schematic cross-sectional view of the internal structure of the transfer clamping assembly and the rotation driving assembly in the present invention in the main viewing direction;

[0032] Figure 3 It is a schematic cross-sectional view of the internal structure of the rolling polishing assembly in the present invention in the main viewing direction;

[0033] Figure 4 It is a schematic cross-sectional view of the internal structure of each component in the present invention in the main viewing direction;

[0034] Figure 5 It is a schematic diagram of the external overall structure of the present invention in the main viewing direction;

[0035] Figure 6 It is a schematic diagram of the external overall structure of the present invention in a top view;

[0036] Figure 7 It is a schematic diagram of the external overall structure of the present invention when viewed from the side.

[0037] In the figure: 1-grinding workbench, 2-sliding clamping port, 3-moving seat, 4-steering drive motor, 5-U-shaped clamping seat, 6-clamping telescopic cylinder, 7-clamping positioning plate, 8-displacement drive motor, 9-driving threaded rod, 10-sliding avoidance port, 11-telescopic storage port, 12-extension slide seat, 13-extension telescopic cylinder, 14-lifting telescopic cylinder, 15-rotation positioning seat, 16-rotation drive motor, 17-top support turntable, 18-lifting grinding seat, 19-installation groove, 20-electrically controlled telescopic cylinder, 21-limiting slide groove, 22-sliding base, 23-motor mounting plate, 24-sliding drive motor, 25-threaded screw, 26-hydraulic telescopic cylinder, 27-L-shaped mounting seat, 28-rolling drive motor, 29-driving roller, 30-rolling grinding belt. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0039] like Figures 1 to 7 As shown, a welding spot grinding device for axle processing includes a grinding workbench 1, which is a horizontally arranged square table. The grinding workbench 1 is respectively provided with a transfer clamping component, a rotating drive component, a lifting rough grinding component and a rolling polishing component.

[0040] A laterally extending sliding clamping opening 2 is provided on the upper surface of the grinding workbench 1, and the transfer clamping assembly includes a horizontally arranged moving seat 3, which is clamped and limited in the sliding clamping opening 2, and a steering drive motor 4 is fixedly connected to the center of the lower surface of the moving seat 3. The end of the output shaft of the steering drive motor 4 passes upward through the moving seat 3 and is fixedly connected to a U-shaped clamping seat 5, and two symmetrical clamping telescopic cylinders 6 are fixedly connected to the inner side wall of the vertical part of the U-shaped clamping seat 5, and the telescopic end of each clamping telescopic cylinder 6 is respectively fixedly connected to a clamping positioning plate 7.

[0041] A displacement drive motor 8 is fixedly connected to each lateral side end face of the grinding workbench 1, and the end of the output shaft of each displacement drive motor 8 passes through the grinding workbench 1 and is fixedly connected to a drive threaded rod 9. The two drive threaded rods 9 are arranged in parallel on both sides of the steering drive motor 4. The end of each drive threaded rod 9 is rotatably supported on the lateral inner wall of the sliding card opening 2, and the two drive threaded rods 9 pass through and are threadedly connected to the moving seat 3.

[0042] Two symmetrical sliding avoidance openings 10 are longitudinally opened in the middle of the upper surface of the grinding workbench 1 , and a telescopic receiving opening 11 is respectively opened on each longitudinal side end surface of the grinding workbench 1 , and the telescopic receiving opening 11 is communicated with the sliding avoidance opening 10 .

[0043] The rotating drive assembly includes two symmetrically arranged extension slides 12, which are respectively slidably arranged in two telescopic receiving openings 11. A horizontal extension telescopic cylinder 13 is respectively fixedly connected to the longitudinal side wall of each telescopic receiving opening 11, and the telescopic end of the extension telescopic cylinder 13 is fixedly connected to the side end surface of the extension slide 12.

[0044] The upper surface of each extension slide 12 is fixedly connected with a lifting and telescopic cylinder 14, the upper telescopic end of the lifting and telescopic cylinder 14 is fixedly connected with a rotating positioning seat 15, the center of the outer end surface of the rotating positioning seat 15 is fixedly connected with a rotating drive motor 16, and the end of the output shaft of the rotating drive motor 16 passes through the rotating positioning seat 15 and is fixedly connected to a top support turntable 17.

[0045] The lifting rough grinding assembly includes two symmetrically arranged lifting grinding seats 18, and the two lifting grinding seats 18 are arranged on both sides of the sliding clamping port 2. The lifting grinding seat 18 is a square seat, and the upper surface of the lifting grinding seat 18 is arranged in an arc-shaped concave shape. The upper surface of the grinding workbench 1 corresponds to each lifting grinding seat 18 and is provided with an installation groove 19. A vertical electric-controlled telescopic cylinder 20 is fixedly connected in each installation groove 19, and the upper telescopic end of the electric-controlled telescopic cylinder 20 is fixedly connected to the lower surface of the lifting grinding seat 18.

[0046] There are two groups of rolling polishing assemblies, which are arranged on both sides of the sliding clamping port 2 and are alternately arranged with the two lifting polishing seats 18.

[0047] The grinding workbench 1 is provided with four limiting slide grooves 21 , and each set of rolling polishing components includes two symmetrically arranged sliding bases 22 , and the two sliding bases 22 are respectively slidably mounted in two laterally opposite limiting slide grooves 21 .

[0048] A motor mounting plate 23 is fixedly connected in each limiting slide groove 21, and a sliding drive motor 24 is fixedly connected to the outer wall of the motor mounting plate 23. The end of the output shaft of the sliding drive motor 24 passes through the motor mounting plate 23 and is fixedly connected to a horizontal threaded screw 25. The end of the threaded screw 25 is rotatably supported on the transverse inner wall of the limiting slide groove 21, and the threaded screw 25 passes through and is threadedly connected to the sliding base 22.

[0049] A vertical hydraulic telescopic cylinder 26 is fixedly connected to the upper surface of each sliding base 22, and an L-shaped mounting seat 27 is fixedly connected to the upper telescopic end of the hydraulic telescopic cylinder 26. A rolling drive motor 28 is fixedly connected to the vertical outer wall of the L-shaped mounting seat 27. The end of the output shaft of the rolling drive motor 28 passes through the L-shaped mounting seat 27 and is fixedly connected to a driving roller 29. A rolling polishing belt 30 is sleeved between two laterally opposite driving rollers 29, and the inner and outer circles of the rolling polishing belt 30 have different surface roughnesses.

[0050] When the present invention is in use: firstly, the displacement drive motor 8 is started, and the displacement drive motor 8 drives the driving threaded rod 9 to rotate, drives the moving seat 3 to move to one end of the sliding clamping opening 2, and places the welded vehicle axle on the U-shaped clamping seat 5 in the horizontal direction, controls the clamping telescopic cylinder 6 to extend, and uses the clamping positioning plate 7 to clamp the middle bridge shell part of the vehicle axle; according to the grinding demand, controls the hydraulic telescopic cylinder 26 to extend and retract, and adjusts the working position of the rolling grinding belt 30; starts the displacement drive motor 8 again, drives the moving seat 3 to slide along the sliding clamping opening 2 to the middle position of the grinding workbench 1, starts the steering drive motor 4, and the steering drive motor 4 drives the U-shaped clamping seat 5 to rotate 90 degrees, so that the clamped vehicle axle is changed from the horizontal clamping state to the horizontal clamping state. The state is converted into a longitudinal clamping state; the lifting and telescopic cylinder 14 is controlled to be extended and retracted to adjust the rotation clamping position of the rotating positioning seat 15; the extension and telescopic cylinder 13 is controlled to be shortened to drive the extension slide 12 to move along the telescopic receiving opening 11, so that the two rotating positioning seats 15 move toward each other, and the supporting turntable 17 is used to support and clamp the axle from both sides; the lifting and telescopic cylinder 14 is controlled to be extended and the clamping telescopic cylinder 6 is shortened to lift the axle as a whole and remove it from the U-shaped clamping seat 5; the extension and telescopic cylinder 13 is controlled to be extended and retracted again to drive the axle to move longitudinally as a whole to adjust the grinding position, and the electric control telescopic cylinder 20 is controlled to be extended to move the lifting and grinding seat 18 close to the annular welding point to be ground on the outer wall of the axle, and the rotation drive motor is started. 16, the rotating drive motor 16 drives the top support turntable 17 to rotate, and then drives the axle as a whole to rotate around the axis, and uses the lifting and grinding seat 18 to perform rough grinding on the welding; after the rough grinding is completed, the lifting and rough grinding assembly is controlled to reset, and the grinding position of the axle is adjusted again by driving the extension slide 12 to move, so that the welding point is facing the two rolling grinding belts 30, and the rolling drive motor 28 is started. The rolling drive motor 28 drives the driving roller 29 to rotate, and then drives the rolling grinding belt 30 to roll in a cycle; the sliding drive motor 24 is started, and the sliding drive motor 24 drives the threaded screw 25 to rotate, driving the sliding base 22 to move laterally along the limiting slide 21, and at the same time controls the hydraulic telescopic cylinder 26 to extend, so that the rolling grinding belt 30 of the cyclic rolling The outer ring of the grinding belt 30 is close to the outer wall of the rotating axle for a first grinding. After the first grinding is completed, the axle is transferred to the transfer clamping assembly for a second clamping, and the steering drive motor 4 is started to rotate the axle from the longitudinal direction back to the transverse direction. By controlling the extension and contraction of the hydraulic telescopic cylinder 26, the L-shaped mounting seat 27 is adjusted to the same height as the axle. At this time, the axle is rotated to the longitudinal direction again, so that the two ends of the axle pass through the middle of the rolling grinding belt 30, and the rotating drive assembly is used again to clamp the axle and drive it to rotate. The position of the rolling grinding belt 30 is adjusted by driving the sliding base 22 to move and controlling the extension and contraction of the hydraulic telescopic cylinder 26, and the inner ring of the rolling grinding belt 30 is used to perform a second grinding on the welding points on the axle.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A welding spot grinding device for axle processing, characterized in that: The invention comprises a grinding workbench (1), wherein the grinding workbench (1) is a horizontally arranged square table, and the grinding workbench (1) is respectively provided with a transfer clamping assembly, a rotation drive assembly, a lifting rough grinding assembly and a rolling polishing assembly, and the upper surface of the grinding workbench (1) is provided with a sliding clamping opening (2) extending laterally; Two symmetrical sliding avoidance openings (10) are provided in the middle of the upper surface of the grinding workbench (1) along the longitudinal direction, and a telescopic receiving opening (11) is provided on each longitudinal side end surface of the grinding workbench (1), and the telescopic receiving opening (11) is connected to the sliding avoidance opening (10); The rotary drive assembly comprises two symmetrically arranged extension slides (12), the two extension slides (12) being slidably arranged in the two telescopic receiving openings (11), respectively, a horizontal extension telescopic cylinder (13) being fixedly connected to the longitudinal side wall of each telescopic receiving opening (11), and a telescopic end of the extension telescopic cylinder (13) being fixedly connected to a side end surface of the extension slide (12); The upper surface of each of the extension slide seats (12) is respectively fixedly connected to a lifting and telescopic cylinder (14), the upper telescopic end of the lifting and telescopic cylinder (14) is fixedly connected to a rotating positioning seat (15), the center of the outer end surface of the rotating positioning seat (15) is fixedly connected to a rotating drive motor (16), and the output shaft end of the rotating drive motor (16) passes through the rotating positioning seat (15) and is fixedly connected to a top support turntable (17); The rolling polishing assembly is provided with two groups, the polishing workbench (1) is provided with four limiting slide grooves (21), each group of the rolling polishing assembly comprises two symmetrically arranged sliding bases (22), and the two sliding bases (22) are respectively slidably mounted in two laterally opposite limiting slide grooves (21); A motor mounting plate (23) is fixedly connected in each of the limiting slide grooves (21), a sliding drive motor (24) is fixedly connected to the outer wall of the motor mounting plate (23), the end of the output shaft of the sliding drive motor (24) passes through the motor mounting plate (23) and is fixedly connected to a horizontal threaded screw (25), the end of the threaded screw (25) is rotatably supported on the transverse inner wall of the limiting slide groove (21), and the threaded screw (25) passes through and is threadedly connected to the sliding base (22); A vertical hydraulic telescopic cylinder (26) is fixedly connected to the upper surface of each sliding base (22), the upper telescopic end of the hydraulic telescopic cylinder (26) is fixedly connected to an L-shaped mounting seat (27), a rolling drive motor (28) is fixedly connected to the vertical outer wall of the L-shaped mounting seat (27), the output shaft end of the rolling drive motor (28) passes through the L-shaped mounting seat (27) and is fixedly connected to a driving roller (29), a rolling grinding belt (30) is sleeved between two laterally opposite driving rollers (29), and the inner and outer rings of the rolling grinding belt (30) have different surface roughnesses.

2. The welding spot grinding device for axle processing according to claim 1 is characterized in that: The transfer clamping assembly comprises a horizontally arranged movable seat (3), and the movable seat (3) is clamped and limited in the sliding clamping opening (2).

3. The welding spot grinding device for axle processing according to claim 2 is characterized in that: A steering drive motor (4) is fixedly connected at the center of the lower surface of the movable seat (3), the output shaft end of the steering drive motor (4) passes through the movable seat (3) upward and is fixedly connected to a U-shaped clamping seat (5), and two symmetrical clamping telescopic cylinders (6) are fixedly connected to the inner side wall of the vertical part of the U-shaped clamping seat (5), and the telescopic end of each clamping telescopic cylinder (6) is respectively fixedly connected to a clamping positioning plate (7).

4. The welding spot grinding device for axle processing according to claim 3 is characterized in that: A displacement drive motor (8) is fixedly connected to each lateral side end face of the grinding workbench (1), and the output shaft end of each displacement drive motor (8) passes through the grinding workbench (1) and is fixedly connected to a drive threaded rod (9). Two drive threaded rods (9) are arranged in parallel on both sides of the steering drive motor (4), and the end of each drive threaded rod (9) is rotatably supported on the lateral inner wall of the sliding clamping opening (2). The two drive threaded rods (9) pass through and are threadedly connected to the moving seat (3).

5. The welding spot grinding device for axle processing according to claim 1, characterized in that: The lifting rough grinding assembly comprises two symmetrically arranged lifting grinding seats (18), the two lifting grinding seats (18) being arranged on both sides of the sliding clamping opening (2), the lifting grinding seats (18) being square seats, and the upper surface of the lifting grinding seats (18) being arranged in an arc-shaped concave shape.

6. The welding spot grinding device for axle processing according to claim 5, characterized in that: The upper surface of the grinding workbench (1) is provided with a mounting groove (19) corresponding to each of the lifting grinding seats (18), and a vertical electric-controlled telescopic cylinder (20) is fixedly connected in each of the mounting grooves (19), and the upper telescopic end of the electric-controlled telescopic cylinder (20) is fixedly connected to the lower surface of the lifting grinding seat (18).

7. The welding spot grinding device for axle processing according to claim 5 is characterized in that: The two groups of rolling polishing assemblies are arranged on both sides of the sliding clamping opening (2) and are arranged alternately with the two lifting polishing seats (18).

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