A post-welding grinding device for automobile parts

Abstract

The present invention belongs to the technical field of automobile parts processing, and discloses a post-welding grinding device for automobile parts, including a base and a workbench, a grinding mechanism is arranged on the right side of the inner wall of the workbench; the grinding mechanism includes a telescopic rod fixedly installed on the right side of the inner wall of the workbench, a connecting block is fixedly installed on the telescopic end of the telescopic rod, a support column is fixedly connected to the middle of the left end of the connecting block, a plurality of groups of circumferentially equidistant clips are fixedly connected to the outer edge of the left end of the connecting block, a sleeve is movably sleeved on the outer surface of the support column, and a mounting frame is fixedly connected to the left end of the sleeve. The device drives the rotating shaft and the grinding roller to rotate through a second motor, and performs a one-time full grinding function on the surface of the workpiece after welding impurities and burrs, and the outer surface of the workpiece does not need to move up and down after the rotation adjustment of the grinding roller, thereby ensuring the uniformity of the device grinding.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts processing, in particular to a post-welding grinding device for automobile parts. Background Art

[0002] Automobile accessories are various structural parts that make up the automobile, including important parts such as transmission shafts, cylinder blocks, various pumps, tires, etc. Among them, some automobile transmission shafts will be welded and connected, and they will rotate coaxially at high speed in a state of mutual extrusion to generate heat, melt the connection parts, and achieve welding. This leads to the need to grind the butt joints of the shafts after welding to eliminate burrs and impurities such as welding residues on the surface of the transmission shaft. Therefore, a post-weld grinding device for automobile accessories is needed for grinding; in the prior art, after the automobile accessories are fixed, a grinding component is usually driven by a motor to approach the workpiece in a state of high-speed rotation, and burrs and impurities on the surface of the accessories are eliminated through high-speed friction to achieve a grinding effect. However, for shaft parts, a smaller grinding component is generally used to move up and down on the surface of the workpiece to cover a larger welding area, which results in an uneven overall grinding effect and is not convenient for controlling the grinding component. Therefore, the present invention redesigns the grinding part, which is expected to overcome the above-mentioned potential defects. Summary of the invention

[0003] The purpose of the present invention is to provide a post-welding grinding device for automobile parts to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a post-welding grinding device for automobile parts, comprising a base and a workbench, a motor 1 is installed at the bottom of the workbench, the output shaft of the motor 1 passes through the interior of the workbench upward and is fixedly connected with a set of fixing mechanisms, another set of fixing mechanisms is rotatably installed at the top of the workbench through bearings, a workpiece is clamped and installed in the middle of the two sets of fixing mechanisms, and a grinding mechanism is arranged on the right side of the inner wall of the workbench;

[0005] The grinding mechanism comprises a telescopic rod fixedly mounted on the right side of the inner wall of the workbench, the telescopic end of the telescopic rod is fixedly mounted on a connecting block, the middle of the left end of the connecting block is fixedly connected to a supporting column, the outer edge of the left end of the connecting block is fixedly connected to a plurality of groups of circumferentially equidistant clips, the outer surface of the support column is movably sleeved with a sleeve, the left end of the sleeve is fixedly connected to a mounting frame, the middle of the mounting frame is rotatably mounted with a rotating shaft, the outer surface of the rotating shaft is fixedly mounted with a grinding roller, the top of the mounting frame is fixedly mounted with a motor 2, the output shaft of the motor 2 is transmission connected to the rotating shaft, the inner cavity of the sleeve is provided with a placement cavity, the outer surface of the support column is movably sleeved with a spring 3 located in the inner cavity of the placement cavity, the two ends of the spring 3 are elastically connected to the placement cavity and the support column respectively, the outer surface of the sleeve is provided with a plurality of groups of adjustment grooves facing one end of the connecting block, and the clips are adapted to be snapped in the adjustment grooves.

[0006] As a preferred solution of the present invention, the fixing mechanism includes a placing table, a group of the placing tables is drivingly connected to the output shaft of motor 1 at the bottom, and another group of the placing tables is rotatably installed on the top of the workbench through bearings, the inner ring surface of the placing table is provided with multiple groups of circumferentially equidistantly distributed grooves, the upper and lower sides of the outer surface of the placing table are fixedly installed with limit rings, and an outer cylinder is movably sleeved through the limit rings, a clamping block is movably clamped inside the clamping groove, one end of the clamping block abuts against the workpiece, and a spring 1 is elastically connected between the other end of the clamping block and the inner wall of the outer cylinder, a transposition block is fixedly connected to the side of the clamping block, and multiple groups of connecting plates and abutting blocks are fixedly connected to the inner wall of the outer cylinder, and the abutting block abuts against the inclined surface of the transposition block, a ratchet is fixedly installed on the top of the outer cylinder, a pawl is rotatably installed on the outer edge of the top of the placing table, and a fixed block located in front of the pawl is fixedly connected, the tip part of the pawl is adapted to be engaged with the inner wall of the ratchet, and a spring 2 is elastically connected between the pawl and the fixed block.

[0007] As a preferred solution of the present invention, the bottom of another group of placement tables is provided with an opening with a diameter greater than that of the workpiece, so that the workpiece can pass through the other group of placement tables downward, and the bottom end of the workpiece abuts against the top of one group of placement tables.

[0008] As a preferred solution of the present invention, the inner wall of the ratchet is provided with a plurality of groups of circumferentially equidistantly distributed saw teeth, the tip portion of the pawl is adapted to be engaged in the saw teeth, and the ratchet can only rotate clockwise around the axis of the workpiece.

[0009] As a preferred solution of the present invention, one end of the outer side of the connecting plate is fixedly connected to the inner wall of the outer cylinder, and the other end of the connecting plate is fixedly connected to the abutment block, and one end of the abutment block facing the transposition block is designed in an arc transition.

[0010] As a preferred solution of the present invention, the grinding mechanism also includes multiple groups of guide cylinders located outside the telescopic rod, one end of the guide cylinder is fixedly connected to the inner wall of the workbench, the other end of the guide cylinder is movably connected with a guide column, and one end of the guide column is fixedly connected to the connecting block.

[0011] As a preferred solution of the present invention, a gripping strip is fixedly installed in the middle of the outer surface of the sleeve, and the gripping strip is made of a rubber block.

[0012] As a preferred solution of the present invention, the left end of the support column abuts against the left side of the inner wall of the placement cavity, and the sleeve as a whole can move along the axis of the support column toward the side close to the workpiece and make the clamping strip disengage from the adjustment groove.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. This device has been improved and optimized, and a new grinding mechanism has been designed. Under the fixed cooperation of the fixing mechanism, the multi-angle grinding function of the workpiece is realized. By setting a grinding roller, it can be driven by motor 2 to rotate at high speed, and the size of the grinding roller is designed to be larger. Facing the impurities and burrs on the outer surface of the workpiece after welding, the inclination angle of the overall axis of the grinding roller and the axis of the workpiece can be changed by rotating the sleeve, so that the area of ​​the grinding roller contacting the outer surface of the workpiece can be freely changed, and one-time adjustment can achieve full coverage. There is no need to move the grinding roller up and down for grinding. The rotating shaft and grinding roller are driven by motor 2 to rotate, and the impurities and burrs on the surface of the workpiece after welding are fully ground at one time. The outer surface of the workpiece does not need to move up and down after the rotation adjustment of the grinding roller, which ensures the uniformity of the grinding of the device.

[0015] 2. At the same time, the device is movably connected to the outer surface of the support column through the sleeve, and with the cooperation of the clamping strip, a stabilization function after angle adjustment is achieved. By opening multiple groups of adjustment grooves on the outer surface of the sleeve at one end facing the connecting block, the clamping strip is clamped in the adjustment groove, and with the mutual connection between the support column and the sleeve, when the sleeve moves toward the side away from the connecting block, the clamping strip is passively disengaged from the adjustment groove, so that the sleeve can drive the grinding roller to rotate freely. Subsequently, the sleeve is pressurized by three springs, and the sleeve is driven to reset as a whole, so that the clamping strip is re-connected to the adjustment groove, thereby realizing the clamping and fixing function after the rotation angle is changed.

[0016] 3. The device is also designed with two sets of upper and lower fixing mechanisms to quickly fix the workpiece. The ratchet is provided to drive the outer cylinder to rotate clockwise, so that the connecting plate and the abutment block inside the outer cylinder rotate clockwise accordingly, and the abutment block abuts against the inclined surface of the transposition block, and drives the clamping block to move horizontally along the radial line of the workpiece toward the axis side close to the workpiece, so that the clamping block and the outer surface of the workpiece get closer and closer and abut against each other, thereby completing the clamping and fixing of the workpiece. The pawl provided on the top of the placement table is always engaged with the serrations on the inner wall of the ratchet with the cooperation of the second spring, so that the ratchet can only rotate in one direction, so that the ratchet can remain in a given position after rotation and fixation, which greatly reduces the fixing steps and difficulty of the device and effectively improves the working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the separation of the grinding mechanism of the present invention;

[0018] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0019] Figure 3 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the overall coordination of the grinding mechanism of the present invention;

[0021] Figure 5 It is a front perspective cutaway schematic diagram of the overall structure of the present invention;

[0022] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0024] Figure 8 It is a schematic diagram of the cooperation between the fixing mechanism of the present invention and the workpiece;

[0025] Fig. 9 It is a schematic diagram of the internal section of the placement table of the present invention;

[0026] Fig.10 It is a schematic diagram of the separation of the fixing mechanism of the present invention.

[0027] In the figure: 1. base; 2. workbench; 3. motor 1; 4. fixing mechanism; 41. placement table; 42. slot; 43. clamping block; 44. displacement block; 45. spring 1; 46. limiting ring; 47. outer cylinder; 48. connecting plate; 49. abutment block; 410. ratchet; 411. fixing block; 412. spring 2; 413. ratchet; 5. workpiece; 6. grinding mechanism; 61. telescopic rod; 62. connecting block; 63. clamping strip; 64. guide cylinder; 65. guide column; 66. support column; 67. sleeve; 68. placement cavity; 69. spring 3; 610. grab bar; 611. mounting frame; 612. motor 2; 613. rotating shaft; 614. grinding roller; 615. adjusting slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0029] like Figures 1 to 10 As shown, an embodiment of the present invention provides a post-weld grinding device for automobile parts, comprising a base 1 and a workbench 2, a motor 3 is installed at the bottom of the workbench 2, the output shaft of the motor 3 passes through the interior of the workbench 2 upward, and is fixedly connected with a set of fixing mechanisms 4, another set of fixing mechanisms 4 is rotatably installed on the top of the workbench 2 through bearings, a workpiece 5 is clamped and installed in the middle of the two sets of fixing mechanisms 4, and a grinding mechanism 6 is arranged on the right side of the inner wall of the workbench 2;

[0030] The grinding mechanism 6 includes a telescopic rod 61 fixedly mounted on the right side of the inner wall of the workbench 2, a connecting block 62 is fixedly mounted on the telescopic end of the telescopic rod 61, a support column 66 is fixedly connected to the middle of the left end of the connecting block 62, a plurality of groups of circumferentially equidistant clamping strips 63 are fixedly connected to the outer edge of the left end of the connecting block 62, a sleeve 67 is movably sleeved on the outer surface of the support column 66, a mounting frame 611 is fixedly connected to the left end of the sleeve 67, a rotating shaft 613 is rotatably mounted on the middle of the mounting frame 611, and a rotating shaft 613 is fixedly mounted on the outer surface of the rotating shaft 613 The grinding roller 614 and the top of the mounting frame 611 are fixedly mounted with a second motor 612, the output shaft of the second motor 612 is in transmission connection with the rotating shaft 613, the inner cavity of the sleeve 67 is provided with a placement cavity 68, the outer surface of the support column 66 is movably sleeved with a third spring 69 located in the inner cavity of the placement cavity 68, the two ends of the third spring 69 are elastically connected to the placement cavity 68 and the support column 66 respectively, and the outer surface of the sleeve 67 is provided with a plurality of adjustment grooves 615 at one end facing the connecting block 62, and the clamping strip 63 is adapted to be clamped in the adjustment groove 615;

[0031] The device has been improved and optimized, and a new grinding mechanism 6 is designed. Under the fixed cooperation of the fixing mechanism 4, the multi-angle grinding function of the workpiece 5 is realized. By providing a grinding roller 614, it is driven by the second motor 612 to rotate at a high speed, and the size of the grinding roller 614 is designed to be larger. Facing the impurities and burrs on the outer surface of the workpiece 5 after welding, the inclination angle of the overall axis of the grinding roller 614 and the axis of the workpiece 5 can be changed by rotating the sleeve 67, so that the area of ​​the grinding roller 614 contacting the outer surface of the workpiece 5 can be freely changed, and one adjustment can achieve full coverage, without the need for the grinding roller 614 to move up and down for grinding, and the motor 612 drives the rotating shaft 613 and the grinding roller 614 to rotate, so as to perform a one-time full grinding function for the impurities and burrs on the surface of the workpiece 5 after welding, and the outer surface of the workpiece 5 does not need to move up and down after the rotation adjustment of the grinding roller 614, thereby ensuring the uniformity of the grinding of the device.

[0032] At the same time, the device is movably connected to the outer surface of the support column 66 through the sleeve 67, and with the cooperation of the clamping strip 63, a stabilizing function after angle adjustment is achieved. By opening a plurality of adjustment grooves 615 on the outer surface of the sleeve 67 at one end facing the connecting block 62, the clamping strip 63 is clamped in the adjusting groove 615. With the mutual connection between the support column 66 and the sleeve 67, when the sleeve 67 moves toward the side away from the connecting block 62, the clamping strip 63 is passively disengaged from the adjusting groove 615, so that the sleeve 67 can drive the grinding roller 614 to rotate freely. Subsequently, the sleeve 67 is pressurized by the spring three 69, and the sleeve 67 is driven to reset as a whole, so that the clamping strip 63 is re-clamped in the adjusting groove 615, thereby achieving the clamping and fixing function after the rotation angle is changed.

[0033] The fixing mechanism 4 includes a placing table 41, the bottom of one group of placing tables 41 is drivingly connected to the output shaft of the motor 3, and the other group of placing tables 41 is rotatably installed on the top of the workbench 2 through a bearing. The inner ring surface of the placing table 41 is provided with a plurality of groups of circumferentially equidistantly distributed grooves 42. The upper and lower sides of the outer surface of the placing table 41 are fixedly installed with a limit ring 46, and an outer cylinder 47 is movably sleeved through the limit ring 46. A clamping block 43 is movably clamped inside the clamping groove 42, one end of the clamping block 43 abuts against the workpiece 5, and the other end of the clamping block 43 is elastically engaged with the inner wall of the outer cylinder 47. The outer cylinder 47 is fixedly connected with a spring 1 45, the side of the clamping block 43 is fixedly connected with a transposition block 44, the inner wall of the outer cylinder 47 is fixedly connected with multiple groups of connecting plates 48 and abutment blocks 49, the abutment blocks 49 abut against the inclined surface of the transposition block 44, the top of the outer cylinder 47 is fixedly installed with a ratchet 413, the outer edge of the top of the placing table 41 is rotatably installed with a pawl 410, and is fixedly connected with a fixed block 411 located at the front side of the pawl 410, the tip part of the pawl 410 is adapted to be engaged with the inner wall of the ratchet 413, and a spring 2 412 is elastically connected between the pawl 410 and the fixed block 411;

[0034] The device is also designed with two sets of upper and lower fixing mechanisms 4 to quickly fix the workpiece 5. The ratchet 413 is provided to drive the outer cylinder 47 to rotate clockwise, so that the connecting plate 48 and the abutment block 49 located inside the outer cylinder 47 rotate clockwise accordingly, and the abutment block 49 abuts against the inclined surface of the transposition block 44, and drives the clamping block 43 to move horizontally along the radial line of the workpiece 5 toward the side close to the axis of the workpiece 5, so that the clamping block 43 and the outer surface of the workpiece 5 are closer and closer, and abut against each other, thereby completing the clamping and fixing of the workpiece 5. The pawl 410 provided on the top of the placement table 41 is always engaged in the serrations of the inner wall of the ratchet 413 with the cooperation of the spring 412, so that the ratchet 413 can only rotate in one direction, so that the ratchet 413 can remain in a given position after rotation and fixation, which greatly reduces the fixing steps and difficulty of the device and effectively improves the working efficiency of the device.

[0035] The bottom of the other set of placement tables 41 is provided with an opening having a diameter greater than that of the workpiece 5, so that the workpiece 5 can pass through the other set of placement tables 41 and downward, and the bottom end of the workpiece 5 abuts against the top of the one set of placement tables 41;

[0036] The upper and lower sets of placement tables 41 jointly fix the workpiece 5 and determine and position the axis of the workpiece 5 during the fixing process.

[0037] The inner wall of the ratchet 413 is provided with a plurality of circumferentially equidistantly distributed saw teeth, and the tip of the ratchet 410 is adapted to be engaged in the saw teeth, so that the ratchet 413 can only rotate clockwise around the axis of the workpiece 5;

[0038] like Figure 8 As shown, the serrations inside the ratchet 413 are just adapted for the pawl 410 to fit therein. In the figure, the ratchet 413 can rotate clockwise. Due to the angular distribution of the tip of the pawl 410, the pawl 410 can be pushed outward by the serrations on the inner wall of the ratchet 413 and compress the second spring 412. Under the elastic force of the second spring 412, the pawl 410 can be re-engaged in a certain set of serrations each time. When the ratchet 413 rotates in the opposite direction, the pawl 410 cannot rotate, that is, the ratchet 413 can be fixed in one direction during rotation, mainly by compressing the second spring 412 and rotating the pawl 410 to keep it away from the inner wall of the ratchet 413. The ratchet 413 can then rotate freely and then be released from the fixation.

[0039] Among them, one end of the outer side of the connecting plate 48 is fixedly connected to the inner wall of the outer cylinder 47, and the other end of the connecting plate 48 is fixedly connected to the abutment block 49, and the abutment block 49 is designed with an arc transition at one end facing the transposition block 44;

[0040] The connecting plate 48 is used to connect the abutment block 49 and the outer cylinder 47, so that the ratchet 413 can synchronously drive the abutment block 49 to rotate when rotating, and abut against the inclined surface of the displacement block 44, so that it produces a displacement perpendicular to its force direction, thereby completing the fixation of the workpiece 5.

[0041] The grinding mechanism 6 further includes a plurality of guide cylinders 64 located outside the telescopic rod 61, one end of the guide cylinder 64 is fixedly connected to the inner wall of the workbench 2, the other end of the guide cylinder 64 is movably connected with a guide column 65, and one end of the guide column 65 is fixedly connected to the connecting block 62;

[0042] The guide cylinder 64 and the guide column 65 constitute a guide mechanism. On the one hand, the guide column 65 is inserted into the guide cylinder 64 to provide support. At the same time, when the telescopic rod 61 drives the connecting block 62 to move, the guide cylinder 64 and the guide column 65 guide the connecting block 62 to prevent the grinding roller 614 from deviating during movement.

[0043] Wherein, a gripping strip 610 is fixedly installed in the middle of the outer surface of the sleeve 67, and the gripping strip 610 is made of a rubber block;

[0044] The gripping strip 610 is convenient for the staff to manipulate the sleeve 67, and its flexible material design conforms to the ergonomic design.

[0045] The left end of the support column 66 abuts against the left side of the inner wall of the placement cavity 68, and the sleeve 67 as a whole can move along the axis of the support column 66 toward the side close to the workpiece 5, and make the clamping strip 63 disengage from the adjustment groove 615;

[0046] The sleeve 67 is tightly sleeved on the outer surface of the support column 66 through the spring three 69. After the sleeve 67 moves horizontally along the axis and completes the angle adjustment, the elastic force generated by the compression of the spring three 69 drives it to automatically reset.

[0047] Working principle:

[0048] First, insert the workpiece 5 along the other set of fixing mechanisms 4 located on the upper side, so that the bottom end of the workpiece 5 abuts against the set of fixing mechanisms 4 located on the lower side, and the bottom end of the workpiece 5 abuts against the placement table 41 located on the lower side, and the workpiece 5 is located between the two sets of placement tables 41;

[0049] Then, the ratchet wheel 413 is rotated clockwise, and the ratchet 410 is driven to rotate around its own axis, and the spring 2 412 is compressed, so that the ratchet 410 is reset when entering the next sawtooth. At the same time, the ratchet wheel 413 drives the outer cylinder 47, the connecting plate 48 and the abutment block 49 to rotate. Fig. 9 As shown, the abutment block 49 will press the inclined surface of the displacement block 44 while rotating, so that the displacement block 44 drives the clamping block 43 to move horizontally along the radial line of the workpiece 5 toward the axis of the workpiece 5, and gradually approach the workpiece 5, until one end of the clamping block 43 abuts against the outer surface of the workpiece 5, and the ratchet 413 stops rotating, and the predetermined position of the clamping block 43 is kept stationary, so as to maintain the fixation of the workpiece 5. At this time, the pawl 410 will be stuck in the serrations of the inner wall of the ratchet 413 under the elastic action of the fixing block 411, and cannot rotate;

[0050] Then, the contact area between the grinding roller 614 and the workpiece 5 is determined according to the area of ​​welding impurities and burrs on the outer surface of the workpiece 5, the gripping bar 610 is pulled to the left, and the sleeve 67 and the grinding roller 614 are driven to move to the left as a whole, and the spring three 69 is compressed to move the adjustment slot 615 to the position where the clamping bar 63 is separated from the inside thereof. At this time, the sleeve 67 is rotated to a specified angle, and then the gripping bar 610 is released, so that the sleeve 67 is reset under the action of the spring three 69, and the clamping bar 63 is re-adapted and engaged into the adjustment slot 615, and the telescopic rod 61 is started, and the connecting block 62, the supporting column 66, the sleeve 67 and the mounting frame 611 are driven to move toward one side of the workpiece 5. When the grinding roller 614 is in contact with the workpiece 5, the telescopic rod 61 is stopped, the motor two 612 is started, and the rotating shaft 613 and the grinding roller 614 are driven to rotate at a high speed to grind the outer surface of the workpiece 5.

[0051] Finally, the motor 1 3 can be started, and the workpiece 5 can be driven to rotate as a whole through the two sets of fixing mechanisms 4, so that the grinding roller 614 can cover the entire surface of the workpiece 5 to complete the grinding work.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A post-weld grinding device for automobile parts, comprising a base (1) and a workbench (2), wherein a motor (3) is installed at the bottom of the workbench (2), characterized in that: The output shaft of the motor 1 (3) passes through the interior of the workbench (2) and is fixedly connected to a set of fixing mechanisms (4); another set of fixing mechanisms (4) is rotatably mounted on the top of the workbench (2) via a bearing; a workpiece (5) is clamped and mounted in the middle of the two sets of fixing mechanisms (4); and a grinding mechanism (6) is arranged on the right side of the inner wall of the workbench (2); The grinding mechanism (6) comprises a telescopic rod (61) fixedly mounted on the right side of the inner wall of the workbench (2); a connecting block (62) is fixedly mounted on the telescopic end of the telescopic rod (61); a support column (66) is fixedly connected to the middle of the left end of the connecting block (62); a plurality of groups of circumferentially equidistant clamping strips (63) are fixedly connected to the outer edge of the left end of the connecting block (62); a sleeve (67) is movably sleeved on the outer surface of the support column (66); a mounting frame (611) is fixedly connected to the left end of the sleeve (67); a rotating shaft (613) is rotatably mounted on the middle of the mounting frame (611); a grinding wheel is fixedly mounted on the outer surface of the rotating shaft (613). A grinding roller (614), a second motor (612) is fixedly mounted on the top of the mounting frame (611), the output shaft of the second motor (612) is drivingly connected to the rotating shaft (613), the inner cavity of the sleeve (67) is provided with a placement cavity (68), the outer surface of the support column (66) is movably sleeved with a third spring (69) located in the inner cavity of the placement cavity (68), the two ends of the third spring (69) are elastically connected to the placement cavity (68) and the support column (66) respectively, and a plurality of adjustment grooves (615) are provided on the outer surface of the sleeve (67) at one end facing the connecting block (62), and the clamping strip (63) is adapted to be clamped in the adjustment groove (615).

2. The post-weld grinding equipment for automobile parts according to claim 1, characterized in that: The fixing mechanism (4) comprises two groups of placement tables (41), the bottom of one group of the placement tables (41) being drivingly connected to the output shaft of the motor (3), and the other group of the placement tables (41) being rotatably mounted on the top of the workbench (2) via a bearing, the inner ring surface of the placement table (41) being provided with a plurality of groups of circumferentially equidistantly distributed clamping grooves (42), the upper and lower sides of the outer surface of the placement table (41) being fixedly mounted with limit rings (46), and an outer cylinder (47) being movably sleeved via the limit rings (46), a clamping block (43) being movably clamped inside the clamping groove (42), one end of the clamping block (43) being in contact with the workpiece (5), and the other end of the clamping block (43) being elastically engaged with the inner wall of the outer cylinder (47). The outer cylinder (47) is fixedly connected with a spring 1 (45), the side of the clamping block (43) is fixedly connected with a displacement block (44), the inner wall of the outer cylinder (47) is fixedly connected with a plurality of connecting plates (48) and abutment blocks (49), the abutment blocks (49) abut against the inclined surface of the displacement block (44), the top of the outer cylinder (47) is fixedly mounted with a ratchet (413), the outer edge of the top of the placing table (41) is rotatably mounted with a pawl (410), and is fixedly connected with a fixing block (411) located in front of the pawl (410), the tip portion of the pawl (410) is adapted to be engaged with the inner wall of the ratchet (413), and a spring 2 (412) is elastically connected between the pawl (410) and the fixing block (411).

3. The post-weld grinding equipment for automobile parts according to claim 2, characterized in that: The bottom of the other group of placement tables (41) is provided with an opening having a diameter greater than that of the workpiece (5), so that the workpiece (5) can pass through the other group of placement tables (41) and penetrate downward, and the bottom end of the workpiece (5) abuts against the top of the one group of placement tables (41).

4. The post-weld grinding equipment for automobile parts according to claim 3, characterized in that: The inner wall of the ratchet (413) is provided with a plurality of groups of saw teeth equidistantly distributed around the circumference, the tip portion of the ratchet pawl (410) is adapted to be engaged in the saw teeth, and the ratchet (413) can only rotate clockwise around the axis of the workpiece (5).

5. The post-weld grinding equipment for automobile parts according to claim 4, characterized in that: One end of the outer side of the connecting plate (48) is fixedly connected to the inner wall of the outer cylinder (47), and the other end of the connecting plate (48) is fixedly connected to the abutment block (49). One end of the abutment block (49) facing the transposition block (44) is designed in a circular arc transition.

6. The post-weld grinding equipment for automobile parts according to claim 5, characterized in that: The grinding mechanism (6) further comprises a plurality of guide cylinders (64) located outside the telescopic rod (61), one end of the guide cylinder (64) being fixedly connected to the inner wall of the workbench (2), the other end of the guide cylinder (64) being movably plugged with a guide column (65), one end of the guide column (65) being fixedly connected to the connection block (62).

7. The post-weld grinding equipment for automobile parts according to claim 6, characterized in that: A gripping strip (610) is fixedly mounted in the middle of the outer surface of the sleeve (67), and the gripping strip (610) is made of a rubber block.

8. The post-weld grinding equipment for automobile parts according to claim 7, characterized in that: The left end of the support column (66) abuts against the left side of the inner wall of the placement cavity (68), and the sleeve (67) as a whole can move along the axis of the support column (66) toward a side close to the workpiece (5) and enable the clamping strip (63) to be separated from the adjustment groove (615).

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