A welding clamping tool for automobile workpiece

Abstract

The present invention discloses a welding clamping tool for automobile workpieces, comprising: a workbench, a clamping table is installed on its side, a connecting piece is installed between adjacent clamping tables, and a clamping rod is hingedly installed on the top side of the clamping table, and a hydraulic rod is hingedly connected between the end of the clamping rod and the bottom of the clamping table; it also comprises: a hydraulic telescopic part, which is installed at equal intervals on the opposite surfaces of the clamping table and the clamping rod, wherein the clamping table and the clamping rod are both provided with a diverter cavity and a pump body, the pump body, the diverter cavity and the hydraulic telescopic part are sequentially connected, and a threaded pipe is sequentially connected between the clamping rod, the pump body in the clamping table and the workbench; a limiting member is arranged in the hydraulic telescopic part. By means of pressurization, the clamping and positioning of the automobile workpiece is achieved, and at the same time, in the process of clamping, it can adapt to the concave and convex surface of the outer side of the workpiece for good clamping, and at the same time, it will not cause the clamping, extrusion, deformation and damage of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of welding clamping, in particular to a welding clamping tool for an automobile workpiece. Background Art

[0002] During the production and preparation stage of automobiles, in order to improve the firmness and stability of formed automobile plates and workpieces, according to existing solutions, semi-automatic arc and plasma arc welding machines are generally used to weld the plate joints of automobile workpieces. Before welding, in order to improve the stability of welding and the quality of forming, it is necessary to clean the welding lines of automobile workpieces and clamp and position the automobile workpieces to prevent cracks and defects in the welding seams of automobile workpieces caused by external factors such as collisions and vibrations.

[0003] The existing automobile workpiece welding process generally adopts relative extrusion external force clamping positioning and magnetic positioning. The magnetic positioning reinforcement method will be synchronously matched with the application of automatic manipulators, so as to facilitate the positioning and movement of the automobile workpiece after clamping and adjust the welding interface position. However, its use cost is high and it will be applied to the fully automatic processing factory of large automobile workpieces. For the small and medium-sized automobile workpiece processing environment, the cost performance is low;

[0004] Furthermore, the use of relative extrusion external force clamping and positioning applies a large external pressure to the automobile workpiece, which may easily cause unstable positioning during the clamping process and compressive deformation of the automobile workpiece at the convex position due to the differences in the outer surface of the automobile workpiece during use, thereby affecting the forming effect of the automobile workpiece.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original automobile workpiece welding clamping tools. Summary of the invention

[0006] The purpose of the present invention is to provide a welding clamping tool for automobile workpieces to solve the problem of unstable positioning during clamping and compressive deformation of the automobile workpiece at the convex position due to the difference in the outer surface of the automobile workpiece in the existing automobile workpiece welding clamping tool proposed in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an automobile workpiece welding clamping tool, comprising:

[0008] A workbench, with a clamping table installed on its side, a connecting piece installed between adjacent clamping tables, and a clamping rod hingedly installed on the top side of the clamping table, and a hydraulic rod hingedly connected between the end of the clamping rod and the bottom of the clamping table;

[0009] It also includes: a hydraulic telescopic member, which is installed at equal intervals on the opposite surfaces of the clamping platform and the clamping rod, wherein the clamping platform and the clamping rod are both provided with a flow diversion chamber and a pump body, the pump body, the flow diversion chamber and the hydraulic telescopic member are sequentially connected, and the clamping rod, the pump body in the clamping platform and the workbench are sequentially connected with a threaded pipe;

[0010] The limiting component is arranged in the hydraulic telescopic component and uses the reaction force of the automobile workpiece and the hydraulic telescopic component to limit the hydraulic extension of the hydraulic telescopic component.

[0011] Preferably, a sliding movable connection is provided between the clamping platform and the connecting member, wherein the connecting member is provided as a guide rail, and the upper end of a pressure-bearing inclined rod is hingedly connected to the bottom of the connection between the connecting member and the outer clamping platform, and the lower end of the pressure-bearing inclined rod is connected to the middle part of the platform base;

[0012] The compressed diagonal rod is telescopically arranged.

[0013] Preferably, the workbench is rotatably connected to the base at its bottom, a motor assembly for controlling the rotation of the workbench is arranged in the base, and a movable support is hinged at the lower end of the compressed diagonal rod, and the lower end of the compressed diagonal rod is slidably connected to the middle part of the base.

[0014] Preferably, the adjacent clamping platforms are parallel and located in the same plane, wherein the clamping platforms and the clamping rods are arranged in one-to-one correspondence, and the hydraulic telescopic parts on the clamping platforms and the clamping rods are staggered.

[0015] Preferably, the diverter cavity is connected through the pump body, the threaded tube and the fluid replenishing component in the workbench, wherein the diverter cavity is connected with the bottom of the hydraulic telescopic part, and the diverter cavity evenly groups the hydraulic telescopic parts distributed at equal intervals.

[0016] Preferably, the limiting member comprises an inner telescopic cylinder movably installed through the middle of the hydraulic telescopic member, wherein an elastic sealing base is fixed to the lower end of the inner telescopic cylinder located inside the hydraulic telescopic member, and a buffer head is fixed to the upper end of the inner telescopic cylinder, and the buffer head is in direct contact with the automobile workpiece;

[0017] An inner support rod is movably installed at the top center of the inner telescopic cylinder, a reinforcing spring is fixed between the inner support rod and the inner telescopic cylinder, a damping pressure rod is movably installed at the bottom of the inner telescopic cylinder, and an inclined rod is hinged between the lower end of the inner support rod and the damping pressure rod.

[0018] Preferably, the damping pressure rod is symmetrically arranged with respect to the vertical center axis of the inner telescopic cylinder, wherein the damping pressure rod is located on the diameter of the cross-sectional circle of the inner telescopic cylinder and the hydraulic telescopic member.

[0019] Preferably, the damping pressure rod and the inner telescopic tube are in a through-engagement sliding connection, the damping pressure rod is located directly above the elastic sealing base, and the elastic sealing base and the inner wall of the inner telescopic tube are in a sliding fit sealing arrangement.

[0020] Preferably, the buffer head is configured as an elastic airbag, wherein the lower end of the inner support rod is slidably fitted and sealed with the inner wall of the inner telescopic tube, and the sealed space where the reinforcing spring is located inside the inner telescopic tube is connected with the inside of the buffer head.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the automobile workpiece welding clamping tool achieves the clamping and positioning of the automobile workpiece by means of pressurization, and can adapt to the concave and convex surface of the outer side of the workpiece for good clamping during the clamping process, and will not cause the clamping, extrusion, deformation and damage of the workpiece. The specific contents are as follows:

[0022] 1. It is only necessary to bring the clamping rod and the clamping platform relatively close to each other, and use the hydraulic telescopic parts on the two to align them. Under the action of hydraulic pressure, the hydraulic telescopic parts are deformed and extended. By using the extension and contraction effect, they are filled to the concave and convex surface of the clamping position on the outside of the automobile workpiece, so as to achieve the effect of adaptive clamping stability according to the different concave and convex outer sides of the automobile workpiece;

[0023] Furthermore, when the hydraulic telescopic member performs relative telescopic movement to achieve the clamping and positioning of the automobile workpiece, an inner support rod limited by a reinforcing spring for a second time is also installed in the hydraulic telescopic member. When the hydraulic telescopic member and the inner telescopic cylinder relatively extend outward to clamp the automobile workpiece by hydraulic means, the reverse pushing force applied by the automobile workpiece to the inner support rod and the reinforcing spring causes the inner support rod to perform reverse movement during the clamping and pressurizing process, and the damping pressure rod is extended outward laterally by driving the inclined rod to squeeze the inner wall of the hydraulic telescopic member, thereby limiting the relative extension of the hydraulic telescopic member and the inner telescopic cylinder, and preventing the deformation and squeezing of the fixed-point position of the automobile workpiece clamping caused by the unlimited extension of the hydraulic telescopic member and the inner telescopic cylinder under the influence of hydraulic pressure;

[0024] 2. An additional elastic airbag-type buffer head and its corresponding sealed inner telescopic cylinder internal cavity are provided, so that when the buffer head directly contacts the automobile workpiece to realize extrusion-type clamping positioning, it can achieve buffer protection at the contact position. At the same time, gas transmission is used to release pressure, so that the buffer head is less destructive and has a longer service life during the process of deformation protection of the automobile workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front structure of the present invention;

[0026] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0027] Figure 3This is a schematic diagram of the top view of the installation distribution structure of the clamping table of the present invention;

[0028] Figure 4 This is a schematic diagram of the installation distribution of the clamping table of the present invention from a bottom-up perspective;

[0029] Figure 5 This is a schematic diagram of the installation structure of the clamping rod of the present invention;

[0030] Figure 6 This is a schematic diagram of the distribution structure of the hydraulic telescopic parts of the present invention;

[0031] Figure 7 This is a schematic diagram of the distribution structure of the diversion cavity of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal front structure of the hydraulic telescopic member of the present invention;

[0033] Fig. 9 It is a schematic diagram of the internal side structure of the hydraulic telescopic member of the present invention;

[0034] Fig.10 It is a schematic diagram of the cross-sectional structure of the hydraulic telescopic member of the present invention;

[0035] Fig.11 It is a schematic diagram of the structure of the compressed diagonal rod of the present invention.

[0036] In the figure: 1. workbench; 2. clamping table; 3. connecting piece; 4. clamping rod; 5. hydraulic rod; 6. hydraulic telescopic piece; 601. inner telescopic cylinder; 602. elastic sealing base; 603. buffer head; 604. inner support rod; 605. reinforcing spring; 606. oblique rod; 607. damping pressure rod; 7. diverter chamber; 8. pump body; 9. threaded pipe; 10. table base; 11. pressure-bearing oblique rod. DETAILED DESCRIPTION

[0037] 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.

[0038] Example 1: Please refer to Figure 1-Figure 10 The present invention provides a technical solution: an automobile workpiece welding clamping tool, comprising:

[0039] A workbench 1, with a clamping table 2 installed on its side, a connecting piece 3 installed between adjacent clamping tables 2, and a clamping rod 4 hingedly installed on the top side of the clamping table 2, and a hydraulic rod 5 hingedly connected between the end of the clamping rod 4 and the bottom of the clamping table 2; adjacent clamping tables 2 are parallel and located in the same plane, wherein the clamping tables 2 and the clamping rod 4 are arranged one by one, and the hydraulic telescopic parts 6 on the clamping tables 2 and the clamping rod 4 are staggered;

[0040] In the above technical solution, if Figure 1-Figure 4 As shown, two clamping tables 2 are relatively distributed, both of which are matched with the clamping rods 4 installed accordingly. The automobile workpiece is initially clamped by the clamping tables 2 and the clamping rods 4. The two clamping tables 2 respectively clamp the two automobile workpieces to be welded, thereby improving the welding effect, facilitating the adjustment of the automobile welding position, and fine-tuning the welding gap.

[0041] In this technical solution, Figure 5-Figure 8 As shown, the scheme also includes: a hydraulic telescopic member 6, which is installed at equal intervals on the opposite surfaces of the clamping platform 2 and the clamping rod 4, wherein the clamping platform 2 and the clamping rod 4 are both provided with a shunt chamber 7 and a pump body 8, the pump body 8, the shunt chamber 7 and the hydraulic telescopic member 6 are sequentially connected, and the clamping rod 4, the pump body 8 in the clamping platform 2 and the workbench 1 are sequentially connected with a threaded tube 9; the shunt chamber 7 is connected with the threaded tube 9 and the liquid replenishing component in the workbench 1 through the pump body 8, wherein the shunt chamber 7 is connected with the bottom of the hydraulic telescopic member 6, and the shunt chamber 7 evenly groups the hydraulic telescopic members 6 distributed at equal intervals;

[0042] In the above scheme, when the initial clamping of the automobile workpiece is achieved through the corresponding application of the clamping table 2 and the clamping rod 4, the automobile workpiece has a different concave-convexity on the outer surface, which may cause unstable clamping of the automobile workpiece. By utilizing the connection and liquid circulation of the threaded tube 9, the pressurized oil in the internal fluid replenishing component of the workbench 1 is introduced into the diversion chamber 7 through the pump body 8, so that the pressurized oil is introduced into the hydraulic telescopic part 6 in a pressurized manner to control the extension movement of the hydraulic telescopic part 6. During the extension process, due to the uniform distribution of the oil pressure of the oil, the hydraulic telescopic parts 6 at different positions are extended or retracted. The hydraulic telescopic parts 6 are squeezed and contacted with the concave-convex outer surface of the automobile workpiece, thereby achieving a pressurized positioning effect of the automobile workpiece and improving the clamping stability of the automobile workpiece.

[0043] Another example Figure 8-Figure 11As shown, continuously introducing the oil into the hydraulic telescopic part 6 under pressure will make the hydraulic telescopic part 6 extend outward to the maximum extent, and make the hydraulic telescopic part 6 push and squeeze the automobile workpiece to form a node, so that the contact node between the hydraulic telescopic part 6 and the automobile workpiece has an impact effect, which is easy to cause the local deformation of the automobile workpiece in the process of extrusion positioning. Therefore, the technical solution also provides an additional limiting component, so that after the automobile workpiece is limited by the hydraulic telescopic part 6, the extension movement of the hydraulic telescopic part 6 is limited, so as to protect the automobile workpiece from extrusion damage during the clamping and positioning process. The specific contents are as follows:

[0044] The limiting member is arranged in the hydraulic telescopic member 6, and utilizes the reaction force of the automobile workpiece and the hydraulic telescopic member 6 to limit the hydraulic extension of the hydraulic telescopic member 6; the limiting member includes an inner telescopic cylinder 601 that is movably installed through the middle of the hydraulic telescopic member 6, wherein the lower end of the inner telescopic cylinder 601 located inside the hydraulic telescopic member 6 is fixed with an elastic sealing base 602, and the upper end of the inner telescopic cylinder 601 is fixed with a buffer head 603, and the buffer head 603 is in direct contact with the automobile workpiece; an inner support rod 604 is also movably installed through the top center of the inner telescopic cylinder 601, and a buffer is fixed between the inner support rod 604 and the inner telescopic cylinder 601. Strong spring 605, a damping pressure rod 607 is movably installed at the bottom of the inner telescopic cylinder 601, and an inclined rod 606 is hinged between the lower end of the inner support rod 604 and the damping pressure rod 607; the damping pressure rod 607 is symmetrically arranged about the vertical central axis of the inner telescopic cylinder 601, wherein the damping pressure rod 607 is located on the diameter of the cross-sectional circle of the inner telescopic cylinder 601 and the hydraulic telescopic member 6; the damping pressure rod 607 and the inner telescopic cylinder 601 are in a through-engaged sliding connection, the damping pressure rod 607 is located directly above the elastic sealing base 602, and the elastic sealing base 602 and the inner wall of the inner telescopic cylinder 601 are in a sliding fit sealing arrangement;

[0045] In the above scheme, first, the oil is pressurized to make the inner telescopic cylinder 601 and the hydraulic telescopic part 6 relatively extend outward, so that the buffer head 603 at the end of the inner telescopic cylinder 601 directly contacts the automobile workpiece and limits the fit of the workpiece. As the hydraulic pressure introduced into the hydraulic telescopic part 6 continues to increase, the reinforcing spring 605 inside the hydraulic telescopic part 6 is compressed by the large hydraulic pressure. At this time, the inner support rod 604 and the inner telescopic cylinder 601 contract, reducing the extrusion external force of the automobile workpiece and preventing the automobile workpiece from being extruded and damaged. At the same time, when the inner support rod 604 contracts, the damping pressure rod 607 is driven to extend axially through the inclined rod 606. The damping pressure rod 607 expands and pressurizes the inner wall of the hydraulic telescopic part 6, and the extension movement of the inner telescopic cylinder 601 stops; under the influence of the oil pressure, the inner telescopic cylinder 601 and the hydraulic telescopic part 6 will not continue to extend outward, preventing the inner telescopic cylinder 601 from continuing to extend outward due to the oil pressure and damaging the stability of the outer surface of the automobile workpiece.

[0046] Another example Fig.11As shown, the buffer head 603 is configured as an elastic airbag, wherein the lower end of the inner support rod 604 is slidably fitted and sealed with the inner wall of the inner telescopic tube 601, and the sealed space where the reinforcing spring 605 is located inside the inner telescopic tube 601 is communicated with the inside of the buffer head 603; in this technical scheme, the buffer head 603 can provide buffering protection at the contact position of the two when contacting the automobile workpiece, and at the same time, the sealed space where the reinforcing spring 605 is located inside the inner telescopic tube 601 is communicated with the inside of the buffer head 603, so that the buffer protection of the contact position can be achieved when the extrusion clamping positioning is realized, and at the same time, the pressure is released by gas transmission, so that the buffer head 603 is less destructive in the process of deformation protection of the automobile workpiece, thereby extending the service life.

[0047] Embodiment 2: Figure 1 and Figure 2 As shown, on the basis of the first embodiment, the present invention further discloses a movable installation method between adjacent clamping tables 2, so that the spacing between adjacent clamping tables 2 can be opened, so that when installing automobile workpieces, when the size difference of automobile workpieces affects the clamping stability, it can be adjusted to facilitate the clamping operation. The specific contents are as follows:

[0048] A sliding movable connection is provided between the clamping table 2 and the connecting member 3, wherein the connecting member 3 is provided as a guide rail, and the upper end of a compression inclined rod 11 is hingedly connected at the bottom of the connection between the connecting member 3 and the outer clamping table 2, and the lower end of the compression inclined rod 11 is connected to the middle part of the table base 10; wherein the compression inclined rod 11 is telescopically provided; the workbench 1 is rotationally connected to the table base 10 at its bottom, and a motor assembly for rotating the workbench 1 is provided in the table base 10, and a movable support is hingedly connected to the lower end of the compression inclined rod 11, and the lower end of the compression inclined rod 11 is slidingly connected to the middle part of the table base 10;

[0049] By utilizing the outward extension control of the compressed inclined rod 11 and the sliding connection between the clamping table 2 and the connecting piece 3, the position of the clamping table 2 is changed to facilitate the clamping of the workpiece. At the same time, a rotating workbench 1 is also provided in the present technical solution, so that the angle of the clamping tool on the workbench 1 can be adjusted. This can provide convenience for clamping and can also set up a multi-station platform to improve the welding processing efficiency of the clamping operation.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding clamping tool for automobile workpieces, comprising: A workbench (1) is provided with a clamping table (2) installed on its side, a connecting piece (3) is installed between adjacent clamping tables (2), and a clamping rod (4) is hingedly installed on the top side of the clamping table (2), and a hydraulic rod (5) is hingedly connected between the end of the clamping rod (4) and the bottom of the clamping table (2); It is characterized by further comprising: A hydraulic telescopic member (6) is installed at equal intervals on the opposite surfaces of the clamping platform (2) and the clamping rod (4), wherein the clamping platform (2) and the clamping rod (4) are both provided with a flow diversion chamber (7) and a pump body (8), the pump body (8) and the flow diversion chamber (7) and the hydraulic telescopic member (6) are sequentially connected, and a threaded pipe (9) is sequentially connected between the clamping rod (4), the pump body (8) in the clamping platform (2) and the workbench (1); A limiting member is arranged in the hydraulic telescopic member (6) and utilizes the reaction force of the automobile workpiece and the hydraulic telescopic member (6) to limit the continuous displacement of the hydraulic telescopic member (6); the limiting member comprises an inner telescopic cylinder (601) movably installed through the middle of the hydraulic telescopic member (6), wherein an elastic sealing base (602) is fixed to the lower end of the inner telescopic cylinder (601) located inside the hydraulic telescopic member (6), and a buffer head (603) is fixed to the upper end of the inner telescopic cylinder (601), and the buffer head (603) is in direct contact with the automobile workpiece; An inner support rod (604) is also movably installed at the top center of the inner telescopic cylinder (601), a reinforcing spring (605) is fixed between the inner support rod (604) and the inner telescopic cylinder (601), a damping pressure rod (607) is movably installed at the bottom of the inner telescopic cylinder (601), and an inclined rod (606) is hinged between the lower end of the inner support rod (604) and the damping pressure rod (607); the damping pressure rod (607) and the inner telescopic cylinder (601) are in a through-engaging sliding connection, the damping pressure rod (607) is located directly above the elastic sealing base (602), and the elastic sealing base (602) and the inner wall of the inner telescopic cylinder (601) are in a sliding and fitting sealing arrangement.

2. The automobile workpiece welding clamping tool according to claim 1, characterized in that: The clamping platform (2) and the connecting member (3) are arranged to be slidably connected, wherein the connecting member (3) is arranged to be a guide rail, and the upper end of a pressure-bearing inclined rod (11) is hingedly connected to the bottom of the connection between the connecting member (3) and the outer clamping platform (2), and the lower end of the pressure-bearing inclined rod (11) is connected to the middle of the platform base (10); The compression diagonal rod (11) is telescopically arranged.

3. The automobile workpiece welding clamping tool according to claim 2, characterized in that: The workbench (1) is rotatably connected to a table base (10) at its bottom, a motor assembly for controlling the rotation of the workbench (1) is arranged in the table base (10), and a movable support is hinged at the lower end of the pressure-bearing inclined rod (11), and the lower end of the pressure-bearing inclined rod (11) is slidably connected to the middle part of the table base (10).

4. The automobile workpiece welding clamping tool according to claim 1 or 3, characterized in that: The adjacent clamping platforms (2) are parallel and located in the same plane, wherein the clamping platforms (2) and the clamping rods (4) are arranged in a one-to-one correspondence, and the hydraulic telescopic parts (6) on the clamping platforms (2) and the clamping rods (4) are staggered.

5. The automobile workpiece welding clamping tool according to claim 4, characterized in that: The diverter chamber (7) is connected to the pump body (8) and the threaded tube (9) and the liquid replenishing component in the workbench (1), wherein the diverter chamber (7) is connected to the bottom of the hydraulic telescopic member (6), and the diverter chamber (7) evenly groups the hydraulic telescopic members (6) distributed at equal intervals.

6. The automobile workpiece welding clamping tool according to claim 1, characterized in that: The damping pressure rod (607) is symmetrically arranged about the vertical central axis of the inner telescopic cylinder (601), wherein the damping pressure rod (607) is located on the diameter of the cross-sectional circle of the inner telescopic cylinder (601) and the hydraulic telescopic member (6).

7. The automobile workpiece welding clamping tool according to claim 1, characterized in that: The buffer head (603) is configured as an elastic airbag, wherein the lower end of the inner support rod (604) is slidably fitted and sealed against the inner wall of the inner telescopic cylinder (601), and the sealed space where the reinforcing spring (605) is located inside the inner telescopic cylinder (601) is connected to the inside of the buffer head (603).

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