Welding fixing tool for bottom of telescopic oil cylinder

Abstract

The invention relates to the technical field of oil cylinder machining, in particular to a telescopic oil cylinder bottom welding fixing tool which comprises a base, a controller arranged on one side of the base, a cylinder body clamp, a cylinder bottom clamp and a rotating assembly used for driving the cylinder body clamp to rotate, the adjusting assembly is used for driving the rotating assembly to be close to or away from the cylinder bottom clamp, the grinding assembly is installed on the base, the adjusting assembly is installed on the base, and the grinding assembly is installed between the cylinder body clamp and the cylinder bottom clamp. According to the welding device, the to-be-welded positions on the cylinder body and the cylinder bottom can be polished before welding, the welding efficiency of the cylinder bottom is improved, the cylinder body and the cylinder bottom can be rotated in the welding process, the situation that the cylinder body and the cylinder bottom are staggered is avoided, and the welding effect of the cylinder body and the cylinder bottom is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinder processing, in particular to a welding fixing tool for a telescopic oil cylinder bottom. Background Art

[0002] like Figure 1 As shown, most of the existing telescopic oil cylinders include a cylindrical cylinder body and a cylinder bottom welded to the end of the cylinder body. During the welding process of the cylinder bottom, a welding fixture is required. For example, the existing Chinese patent with the authorization announcement number CN210633196U discloses a welding fixture for a heavy-duty forklift oil cylinder and an oil cylinder base. The oil cylinder base is a rectangular parallelepiped, and a plurality of first circular through holes are arranged on the oil cylinder base body. The oil cylinder is cylindrical; the fixture includes a supporting part for carrying the oil cylinder base to be welded and the oil cylinder and an adjusting limit part for clamping the oil cylinder; the supporting part includes The invention comprises a bottom plate and a vertical plate which is perpendicular to and fixedly connected to the bottom plate; the oil cylinder base is symmetrically arranged on both sides of the bottom plate, a plurality of second circular through holes are arranged on the bottom plate, and the centers of the second circular through holes and the first circular through holes are on the same axis; an internal thread is arranged in the first through hole; an adjusting limit part is arranged on the bottom plate, and the adjusting limit part is movably connected to the bottom plate; the oil cylinder base is locked and fixed on the bottom plate, the oil cylinder is placed on the oil cylinder base, and the oil cylinder is pushed against the vertical plate by the adjusting limit part so as to be close to the vertical plate and will not roll. The structure is novel, improves efficiency and precision and is easy to operate.

[0003] However, in actual application, the above device still has the following shortcomings: first, before welding, the cylinder body and the cylinder bottom need to be polished to ensure the sealing of the joint after welding, and the above device does not have a polishing structure, which results in the need to manually polish the welding part of the above cylinder before welding, reducing the welding efficiency of the cylinder bottom; secondly, the above device can only fix the cylinder body, and cannot rotate the cylinder body and the cylinder bottom during the welding process, which results in the cylinder bottom being easily misaligned with the cylinder body during the welding process, affecting the welding effect. Summary of the invention

[0004] The purpose of the present invention is to provide a welding fixing tool for the bottom of a telescopic oil cylinder in view of the above-mentioned deficiencies, which can not only grind the parts to be welded on the cylinder body and the cylinder bottom before welding to improve the welding efficiency of the cylinder bottom, but also rotate the cylinder body and the cylinder bottom during the welding process to avoid the cylinder body and the cylinder bottom being misaligned, thereby ensuring the welding effect of the cylinder body and the cylinder bottom.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A welding and fixing tool for the bottom of a telescopic oil cylinder comprises a base, a controller arranged on one side of the base, a cylinder body clamp and a cylinder bottom clamp symmetrically arranged on the base, a rotating component used to drive the cylinder body clamp to rotate, an adjusting component used to drive the rotating component to approach or move away from the cylinder bottom clamp, and a grinding component installed on the base, the adjusting component is installed on the base, the grinding component is installed between the cylinder body clamp and the cylinder bottom clamp, and the cylinder body clamp, cylinder bottom clamp, rotating component, adjusting component and grinding component are all electrically connected to the controller.

[0007] Furthermore, a transverse slide groove is provided on the base; the adjusting component includes a slider 1 and a slider 2 slidably connected in the transverse slide groove, a lead screw rotatably connected in the transverse slide groove, and an adjusting motor fixed at one end of the transverse slide groove, the adjusting motor is used to drive the lead screw to rotate, and two sections of external threads 1 and external threads 2 with opposite rotation directions are adjacently provided on the lead screw, and internal thread holes 1 and 2 are respectively provided on the slider 1 and the slider 2 opposite to the external threads 1 and 2, the rotating component is installed on the slider 1, and the cylinder bottom clamp is installed on the slider 2.

[0008] Furthermore, the rotating assembly includes a base plate 1 fixed on the slider 1, a mounting base 1 fixed on the base plate 1 and a rotating motor, the mounting base 1 is rotatably connected with a rotating disk 1, a circular rotating through groove is provided in the mounting base 1, an internal gear 1 is provided in the circular rotating through groove, an external gear 1 meshing with the internal gear 1 is provided on the outer arc surface of the rotating disk 1, an opening connected to the circular rotating through groove is provided on one side of the mounting base 1, a rotating gear is drivingly connected to the output shaft of the rotating motor, the rotating gear meshes with the external gear 1 from the opening, and the cylinder body clamp is installed on the rotating disk 1.

[0009] Furthermore, a circular plug-in slot is provided in the rotating disk 1, an annular groove is provided radially outward in the circular plug-in slot, a driving slot is provided on one side of the annular groove, and a plurality of guide straight slots are provided on one side of the rotating disk 1, and the plurality of guide straight slots are distributed outwardly with the axis of the rotating disk 1 as the center; the cylinder body clamp includes a clamp disk rotatably connected to the annular groove, a clamp motor fixed to one end of the rotating disk 1, a corresponding slot is provided on the clamp disk facing the circular plug-in slot, and the output end of the clamp motor extends into the driving slot and is connected to the clamp A clamp gear, an outer gear 2 is arranged on the outer wall of the clamp disk, an inner gear 2 is arranged on the inner wall of the annular groove, and the outer gear 2 is meshed with the clamp gear, and a plurality of spiral guide grooves are arranged on the clamp disk, and the plurality of spiral guide grooves are spirally divergent outward with the axis of the rotating disk 1 as the center, and a clamp slider is arranged in the spiral guide groove, and one end of the clamp slider is connected to a clamp connecting block after passing through the guide straight groove, and one end of the clamp connecting block is connected to a circular arc clamp block 1, and a plurality of circular arc clamp blocks 1 are surrounded to form a clamp ring 1.

[0010] Furthermore, the cylinder bottom clamp includes a bottom plate 2 fixed on the slider 2, a mounting seat 2 fixed on the bottom plate 2, and a rotating disk 2 rotatably connected to the mounting seat 2, two clamp slide grooves are symmetrically arranged on the rotating disk 2, a slider 3 is slidably connected in the clamp slide groove, and an electric push rod is used to drive the slider 3 to slide along the clamp slide groove, the electric push rod is fixed at one end of the clamp slide groove, a connecting seat is fixed on the slider 3, and an arc-shaped clamp block 2 is fixed on the connecting seat, when the two sliders 3 are in a close state, the two arc-shaped clamp blocks 2 are surrounded to form a clamp ring 2, and a connecting slot is arranged on the rotating disk 2 opposite to the corresponding slot, the clamp ring 1 and the clamp ring 2 are coaxially arranged, and the connecting slot and the clamp ring 2 are coaxially arranged.

[0011] Furthermore, a longitudinal slide groove is provided on the base, and the longitudinal slide groove is vertically arranged between two transverse slide grooves, and a slider four is slidably connected in the longitudinal slide groove; the grinding assembly includes an electric cylinder fixed at one end of the longitudinal slide groove, a mounting frame fixed on the slider four, a rotating shaft rotatably connected to the mounting frame, and a grinding motor fixed on the mounting frame, the piston rod head of the electric cylinder is drivingly connected to the slider four, and grinding wheels are symmetrically installed on the rotating shaft. When the piston rod head of the electric cylinder is in an extended state, two grinding wheels are arranged opposite to the end of the cylinder body and the end of the cylinder bottom, a driven wheel is fixed on the rotating shaft, and a driving wheel is drivingly connected to the output shaft of the grinding motor, and the driving wheel and the driven wheel are connected by a belt.

[0012] The beneficial effects of the present invention are:

[0013] In actual application, when in use, the cylinder body is clamped by the cylinder body clamp, the cylinder bottom clamp is clamped by the cylinder bottom clamp, the adjusting component drives the rotating component to drive the cylinder body clamp close to the cylinder bottom clamp, and the welding part on the cylinder body and the cylinder bottom is polished by the polishing component; after the polishing is completed, the adjusting component drives the cylinder body clamp close to the cylinder bottom clamp again until the cylinder body abuts against the cylinder bottom, firstly, several welding points are made at the abutting part of the cylinder body and the cylinder bottom to connect the cylinder body and the cylinder bottom, and then the cylinder body is driven to rotate by the rotating component, and the cylinder body drives the cylinder bottom to rotate synchronously through the welding points, so that the cylinder bottom can be welded and fixed; the present invention can not only polish the parts to be welded on the cylinder body and the cylinder bottom before welding, thereby improving the welding efficiency of the cylinder bottom, but also rotate the cylinder body and the cylinder bottom during the welding process to avoid the situation where the cylinder body and the cylinder bottom are misaligned, thereby ensuring the welding effect of the cylinder body and the cylinder bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the telescopic cylinder;

[0015] Figure 2 It is a schematic diagram of the structure of the present invention;

[0016] Figure 3 is a top view of the present invention;

[0017] Figure 4 yes Figure 3 Sectional view at AA in the middle;

[0018] Figure 5 yes Figure 3 Sectional view at the middle BB;

[0019] Figure 6 yes Figure 3 Sectional view at CC;

[0020] Figure 7 yes Figure 3 Partial cross-sectional view at D in the middle;

[0021] Figure 8 It is a structural schematic diagram of the clamping plate in the present invention;

[0022] Figure numerals: base 1; transverse slide 11; longitudinal slide 12; cylinder body fixture 2; fixture plate 21; spiral guide groove 211; corresponding slot 212; fixture motor 22; fixture gear 23; external gear 24; fixture slider 25; fixture connecting block 26; arc-shaped clamping block 1 27; cylinder bottom fixture 3; bottom plate 2 31; mounting seat 2 32; rotating plate 2 33; fixture slide 331; electric push rod 34; connecting seat 35; arc-shaped clamping block 2 36; connecting slot 332; rotating group Part 4; bottom plate 41; mounting seat 42; rotating motor 43; rotating disk 44; circular plug-in slot 441; driving slot 442; guide straight slot 443; internal gear 45; rotating gear 46; adjusting assembly 5; slider 1 51; slider 2 52; lead screw 53; adjusting motor 54; grinding assembly 6; electric cylinder 61; mounting frame 62; rotating shaft 63; grinding motor 64; grinding wheel 65; driven wheel 66; driving wheel 67; belt 68; cylinder body 100; cylinder bottom 101. DETAILED DESCRIPTION

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0024] like Figure 1-8 As shown, a welding and fixing tool for the bottom of a telescopic oil cylinder includes a base 1, a controller arranged on one side of the base 1, a cylinder body clamp 2 and a cylinder bottom clamp 3 symmetrically arranged on the base 1, a rotating component 4 used to drive the cylinder body clamp 2 to rotate, an adjusting component 5 used to drive the rotating component 4 to approach or move away from the cylinder bottom clamp 3, and a grinding component 6 installed on the base 1, the adjusting component 5 is installed on the base 1, and the grinding component 6 is installed between the cylinder body clamp 2 and the cylinder bottom clamp 3, and the cylinder body clamp 2, the cylinder bottom clamp 3, the rotating component 4, the adjusting component 5 and the grinding component 6 are all electrically connected to the controller.

[0025] like Figure 1-8As shown, a transverse slide groove 11 is provided on the base 1; the adjusting component 5 includes a slider 1 51 and a slider 2 52 slidably connected in the transverse slide groove 11, a lead screw 53 rotatably connected in the transverse slide groove 11, and an adjusting motor 54 fixed at one end of the transverse slide groove 11, and the adjusting motor 54 is used to drive the lead screw 53 to rotate, and two sections of external threads 1 and external threads 2 with opposite rotation directions are adjacently arranged on the lead screw 53, and internal thread holes 1 and 2 are respectively arranged on the slider 1 51 and the slider 2 52 opposite to the external threads 1 and 2, and the rotating component 4 is installed on the slider 1 51, and the cylinder bottom fixture 3 is installed on the slider 2 52; in this embodiment, since the slider 1 51 is screwed to the external thread 1 through the internal thread hole 1, and the slider 2 52 is screwed to the external thread 2 through the internal thread hole 2, when the adjusting motor 54 drives the lead screw 53 to rotate, the slider 1 51 and the slider 2 52 are close to or away from each other along the transverse slide groove 11, so that the cylinder body fixture 2 and the cylinder bottom fixture 3 are close to or away from each other.

[0026] like Figure 1-8 As shown, the rotating assembly 4 includes a bottom plate 41 fixed on the slider 51, a mounting seat 42 fixed on the bottom plate 41 and a rotating motor 43, a rotating disk 44 is rotatably connected in the mounting seat 42, a circular rotating through groove is provided in the mounting seat 42, an internal gear 45 is provided in the circular rotating through groove, an external gear 1 meshing with the internal gear 45 is provided on the outer arc surface of the rotating disk 44, an opening connected to the circular rotating through groove is provided on one side of the mounting seat 42, a rotating gear 46 is drivingly connected to the output shaft of the rotating motor 43, and the rotating gear 46 is drivingly connected to the output shaft of the rotating motor 43. The wheel 46 meshes with the outer gear 1 from the opening, and the cylinder body clamp 2 is installed on the rotating disk 1 44; in this embodiment, after grinding is completed, the adjustment component 5 drives the cylinder body clamp 2 to approach the cylinder bottom clamp 3 again until the cylinder body 100 abuts against the cylinder bottom 101, and firstly, several welding points are made at the abutment between the cylinder body 100 and the cylinder bottom 101 to connect the cylinder body 100 and the cylinder bottom 101, and the rotating motor 43 drives the rotating disk 1 44 to rotate in the circular rotating groove by meshing with the rotating gear 46 and the outer gear 1, and the cylinder body 100 drives the cylinder bottom 101 to rotate synchronously through the welding points, and the cylinder bottom 101 can be welded and fixed using external welding equipment.

[0027] like Figure 1-8As shown, a circular plug-in groove 441 is provided in the rotating disk 1 44, an annular groove is radially provided in the circular plug-in groove 441, a driving groove 442 is provided on one side of the annular groove, and a plurality of guide straight grooves 443 are provided on one side of the rotating disk 1 44, and the plurality of guide straight grooves 443 are distributed outwardly with the axis of the rotating disk 1 44 as the center; the cylinder body clamp 2 includes a clamp disk 21 rotatably connected in the annular groove, a clamp motor 22 fixed at one end of the rotating disk 1 44, a corresponding slot 212 is provided on the clamp disk 21 facing the circular plug-in groove 441, the output end of the clamp motor 22 extends into the driving groove 442 and is connected to a clamp gear 23, an outer gear 24 is provided on the outer side wall of the clamp disk 21, an inner gear 2 meshing with the outer gear 24 is provided on the inner side wall of the annular groove, and the outer gear 24 meshes with the clamp gear 23. The fixture disk 21 is provided with a plurality of spiral guide grooves 211, and the plurality of spiral guide grooves 211 are spirally distributed outwardly with the axis of the rotating disk 44 as the center, and a fixture slider 25 is provided in the spiral guide groove 211, and one end of the fixture slider 25 passes through the guide straight groove 443 and is connected to a fixture connecting block 26, and one end of the fixture connecting block 26 is connected to an arc-shaped clamping block 27, and a plurality of arc-shaped clamping blocks 27 are enclosed to form a fixture ring. 1. In this embodiment, when in use, the end of the cylinder body 100 is passed through the corresponding slot 212, and the clamp motor 22 drives the clamp plate 21 to rotate through the clamp gear 23 and the external gear 24. When the clamp plate 21 rotates and drives the clamp slider 25 to slide along the spiral guide groove 211, the clamp slider 25 slides along the guide straight groove 443. At this time, the multiple arc-shaped clamp blocks 27 approach each other, reducing the inner diameter of the clamp ring 1, until the multiple arc-shaped clamp blocks 27 clamp the cylinder body 100.

[0028] like Figure 1-8As shown, the cylinder bottom clamp 3 includes a bottom plate 2 31 fixed on the slider 2 52, a mounting seat 2 32 fixed on the bottom plate 2 31, a rotating disk 2 33 rotatably connected to the mounting seat 2 32, two clamp slide grooves 331 are symmetrically arranged on the rotating disk 2 33, a slider 3 is slidably connected in the clamp slide groove 331, and an electric push rod 34 is used to drive the slider 3 to slide along the clamp slide groove 331, the electric push rod 34 is fixed at one end of the clamp slide groove 331, a connecting seat 35 is fixed on the slider 3, and an arc-shaped clamp block 2 36 is fixed on the connecting seat 35. When the two sliders 3 are in a close state, the two arc-shaped clamp blocks 2 36 are surrounded to form a clamp ring 2. A connecting slot 332 is provided on the rotating disk 2 33 facing the corresponding slot 212, the clamp ring 1 is coaxially arranged with the clamp ring 2, and the connecting slot 332 is coaxially arranged with the clamp ring 2; in this embodiment, when in use, one end of the cylinder bottom 101 is passed through the connecting slot 332, and the electric push rod 34 drives the two sliding blocks 3 to approach each other, and the cylinder bottom 101 is clamped by two arc-shaped clamping blocks 2 36; during the welding process, a few welding points are first made at the abutment between the cylinder body 100 and the cylinder bottom 101 to connect the cylinder body 100 and the cylinder bottom 101, and then the cylinder body 100 is driven to rotate by the rotating component 4, the cylinder body 100 drives the cylinder bottom 101 through the welding points, and the rotating disk 2 33 rotates synchronously, and the cylinder bottom 101 can be welded and fixed.

[0029] like Figure 1-8 As shown, the base 1 is provided with a longitudinal slide groove 12, the longitudinal slide groove 12 is vertically arranged between the two transverse slide grooves 11, and a slider four is slidably connected in the longitudinal slide groove 12; the grinding assembly 6 includes an electric cylinder 61 fixed at one end of the longitudinal slide groove 12, a mounting frame 62 fixed on the slider four, a rotating shaft 63 rotatably connected to the mounting frame 62, and a grinding motor 64 fixed on the mounting frame 62, the piston rod head of the electric cylinder 61 is drivingly connected to the slider four, and a grinding wheel 65 is symmetrically installed on the rotating shaft 63. When the piston rod head of the electric cylinder 61 is in an extended state, Two grinding wheels 65 are arranged opposite to the ends of the cylinder body 100 and the ends of the cylinder bottom 101, a driven wheel 66 is fixed on the rotating shaft 63, a driving wheel 67 is driven and connected on the output shaft of the grinding motor 64, and the driving wheel 67 and the driven wheel 66 are connected by a belt 68; in this embodiment, the piston rod head of the electric cylinder 61 drives the slider 4 to slide forward, the adjustment component 5 drives the rotating component 4 to drive the cylinder body clamp 2 to approach the cylinder bottom clamp 3, and the grinding motor 64 drives the rotating shaft 63 and the grinding wheel 65 to rotate through the driving wheel 67, the belt 68 and the driven wheel 66 to grind the welding parts on the cylinder body 100 and the cylinder bottom 101.

[0030] The specific embodiments described herein are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways without departing from the scope of the present invention.

Claims

1. A welding fixture for the bottom of a telescopic oil cylinder, comprising a base (1), a controller arranged on one side of the base (1), a cylinder body clamp (2) and a cylinder bottom clamp (3) symmetrically arranged on the base (1), a rotating assembly (4) used to drive the cylinder body clamp (2) to rotate, an adjusting assembly (5) used to drive the rotating assembly (4) to approach or move away from the cylinder bottom clamp (3), and a grinding assembly (6) installed on the base (1), the adjusting assembly (5) being installed on the base (1), the grinding assembly (6) being installed between the cylinder body clamp (2) and the cylinder bottom clamp (3), and the cylinder body clamp (2), the cylinder bottom clamp (3), the rotating assembly (4), the adjusting assembly (5) and the grinding assembly (6) being electrically connected to the controller.

2. The welding fixture for the bottom of a telescopic oil cylinder according to claim 1, characterized in that: The base (1) is provided with a transverse slide groove (11); the adjustment component (5) comprises a slider 1 (51) and a slider 2 (52) slidably connected in the transverse slide groove (11), a lead screw (53) rotatably connected in the transverse slide groove (11), and an adjustment motor (54) fixed at one end of the transverse slide groove (11); the adjustment motor (54) is used to drive the lead screw (53) to rotate; two sections of external threads 1 and 2 with opposite rotation directions are adjacently arranged on the lead screw (53); the slider 1 (51) and the slider 2 (52) are respectively provided with internal thread holes 1 and 2 facing the external threads 1 and 2; the rotating component (4) is mounted on the slider 1 (51); and the cylinder bottom clamp (3) is mounted on the slider 2 (52).

3. The welding fixture for the bottom of a telescopic oil cylinder according to claim 2, characterized in that: The rotating assembly (4) comprises a base plate (41) fixed on the slider (51), a mounting seat (42) fixed on the base plate (41) and a rotating motor (43); a rotating disk (44) is rotatably connected to the mounting seat (42); a circular rotating through groove is provided in the mounting seat (42); an internal gear (45) is provided in the circular rotating through groove; an external gear (45) meshing with the internal gear (45) is provided on the outer arc surface of the rotating disk (44); an opening connected to the circular rotating through groove is provided on one side of the mounting seat (42); a rotating gear (46) is drivingly connected to the output shaft of the rotating motor (43); the rotating gear (46) meshes with the external gear (45) from the opening; and the cylinder body clamp (2) is mounted on the rotating disk (44).

4. The welding fixture for the bottom of a telescopic oil cylinder according to claim 2, characterized in that: The rotating disk (44) is provided with a circular plug-in groove (441), an annular groove is radially arranged outward in the circular plug-in groove (441), a driving groove (442) is arranged on one side of the annular groove, and a plurality of guide straight grooves (443) are arranged on one side of the rotating disk (44), and the plurality of guide straight grooves (443) are distributed outwardly with the axis of the rotating disk (44) as the center; the cylinder body clamp (2) includes a clamp disk (21) rotatably connected in the annular groove, a clamp motor (22) fixed at one end of the rotating disk (44), a corresponding slot (212) is arranged on the clamp disk (21) facing the circular plug-in groove (441), and the output end of the clamp motor (22) extends into the driving groove (442) and is connected with a clamp gear The outer wall of the clamp disk (21) is provided with an outer gear 2 (24), the inner wall of the annular groove is provided with an inner gear 2 meshing with the outer gear 2 (24), the outer gear 2 (24) meshing with the clamp gear (23), the clamp disk (21) is provided with a plurality of spiral guide grooves (211), the plurality of spiral guide grooves (211) are spirally distributed outward with the axis of the rotating disk 1 (44) as the center, a clamp slider (25) is provided in the spiral guide groove (211), one end of the clamp slider (25) passes through the guide straight groove (443) and is connected to a clamp connection block (26), one end of the clamp connection block (26) is connected to a circular arc clamp block 1 (27), and a plurality of circular arc clamp blocks 1 (27) are surrounded to form a clamp ring 1.

5. The welding fixture for the bottom of a telescopic oil cylinder according to claim 4, characterized in that: The cylinder bottom clamp (3) comprises a bottom plate (31) fixed on the slider (52), a mounting seat (32) fixed on the bottom plate (31), a rotating disk (33) rotatably connected to the mounting seat (32), two clamp slide grooves (331) symmetrically arranged on the rotating disk (33), a slider (3) slidably connected in the clamp slide groove (331), and an electric push rod (34) used to drive the slider (3) to slide along the clamp slide groove (331), the electric push rod (34) The rod (34) is fixed to one end of the clamp slide groove (331), a connecting seat (35) is fixed on the slider three, and a circular arc-shaped clamp block 2 (36) is fixed on the connecting seat (35). When the two sliders three are in a close state, the two circular arc-shaped clamp blocks 2 (36) are combined to form a clamp ring 2. A connecting slot (332) is arranged on the rotating disk 2 (33) opposite to the corresponding slot (212). The clamp ring 1 is coaxially arranged with the clamp ring 2, and the connecting slot (332) is coaxially arranged with the clamp ring 2.

6. The welding fixture for the bottom of a telescopic oil cylinder according to claim 1, characterized in that: The base (1) is provided with a longitudinal slide groove (12), the longitudinal slide groove (12) is vertically arranged between the two transverse slide grooves (11), and a slider four is slidably connected in the longitudinal slide groove (12); the grinding assembly (6) comprises an electric cylinder (61) fixed at one end of the longitudinal slide groove (12), a mounting frame (62) fixed on the slider four, a rotating shaft (63) rotatably connected to the mounting frame (62), and a grinding motor (64) fixed on the mounting frame (62), the electric cylinder (61) 1) is connected to the slider 4 by a piston rod head, the rotating shaft (63) is symmetrically provided with grinding wheels (65), when the piston rod head of the electric cylinder (61) is in an extended state, the two grinding wheels (65) are arranged facing the end of the cylinder body (100) and the end of the cylinder bottom (101), a driven wheel (66) is fixed on the rotating shaft (63), the output shaft of the grinding motor (64) is connected to a driving wheel (67), and the driving wheel (67) and the driven wheel (66) are connected by a belt (68).

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