CN217942322U - Welding fixture for large-sized workpiece - Google Patents

Abstract

A welding fixture for large workpieces relates to the field of welding automation equipment. It includes a workbench and clamping devices respectively arranged at both ends of the workbench; the clamping device includes a workpiece width positioning assembly for limiting the width of the workpiece, a workpiece length positioning assembly for limiting the length of the workpiece, The workpiece side clamping assembly for clamping both sides of the workpiece, the workpiece upper pressing assembly for pressing the upper end surface of the workpiece, the workpiece end surface positioning assembly for limiting the two ends of the workpiece, the workpiece upper pressing assembly and The workpiece end face positioning components are respectively arranged on the feeding component, and the feeding component pushes the pressing component on the workpiece and the workpiece end face positioning component to move. This fixture is designed for heavy-duty workpiece welding. The structural parts have high strength. The hydraulic cylinder is used for clamping. The clamping force is large, and it has an automatic positioning function to ensure the stability of the welding size of the workpiece.

Description

A Welding Fixture for Large Workpieces

technical field

The utility model relates to the field of welding automation equipment, in particular to a welding fixture for large workpieces.

Background technique

At present, the welding of large-scale workpieces, such as the main beam of the aircraft, the main beam of the crane and other large-scale lifting equipment structural parts, is manually assembled with the aircraft, welding, low efficiency, difficult to ensure the installation size, poor welding quality stability and other problems; so there is an urgent need for a This kind of fixture assists workers to assemble and facilitate welding. Most weldment fixtures on the market are light-loaded. It is difficult to use welding fixtures for large workpieces, because the larger the weldment, the greater the internal stress generated during the welding process. higher structural requirements.

Utility model content

In order to realize the clamping of large workpieces and realize the automatic positioning function during the clamping process, the utility model adopts the following technical solutions:

A welding fixture for a large workpiece, including a workbench, and clamping devices respectively arranged at both ends of the workbench; the clamping device includes a workpiece width positioning component for limiting the workpiece width, and a workpiece width positioning component for positioning the workpiece length. Limiting workpiece length positioning components, workpiece side clamping components for clamping both sides of the workpiece, workpiece upper clamping components for pressing the upper end surface of the workpiece, workpiece end surface positioning for limiting the two ends of the workpiece Components, Feed Components.

The feeding assembly includes the first slide rail, the third oil cylinder, and the L-shaped bracket; the first slide rail is fixedly installed on the workbench and the first slide rail is equipped with a sliding platform, and the bottom of the L-shaped bracket is fixedly connected with the sliding platform. One end of the three oil cylinders is fixedly installed on the workbench, and the other end is connected with the L-shaped bracket, and the pressing component on the workpiece and the positioning component of the workpiece end face are respectively arranged on the L-shaped bracket.

Specifically, there are multiple pairs of auxiliary feeding components on the workbench. The auxiliary feeding components include a first guide column, a second oil cylinder, a splint, and a first fixing column; the first guide column is arranged on one side of the workbench, and the second The second oil cylinder and the first guide column are fixedly installed on the first fixed column, and the driving end of the second oil cylinder is connected with the splint after passing through the first fixed column. The driving direction of the first guide column and the second oil cylinder are parallel, and multiple pairs of auxiliary upper The splints of the material components are relatively set.

Specifically, the workpiece width positioning assembly includes a first limit block, a telescopic rod, a first oil cylinder, a second limit block, and a fixed block; the first limit block is arranged on one side of the worktable, and the driving end of the first oil cylinder is connected to the One end of the telescopic rod is connected, the fixed block is provided with a limit pin, the telescopic rod is provided with a limit slot, the other end of the telescopic rod runs through the fixed block and the limit pin is inserted in the limit slot, and the second limit block is fixedly installed on the on the other end of the telescoping rod.

Specifically, the workpiece length positioning assembly includes two hydraulic cylinders and the sixth oil cylinder; the two hydraulic cylinders and the sixth oil cylinder are arranged on the same horizontal line, the driving end of the hydraulic cylinder is provided with jaws and drives the jaws to move up and down, and the sixth oil cylinder The driving direction is horizontal.

Specifically, the workpiece end face positioning assembly includes a first limiting plate, a second limiting plate, a fifth oil cylinder, a second slide rail, and a bracket; the first limiting plate, the second sliding rail, and the bracket are fixedly installed on the L-shaped bracket , a slider is arranged on the second slide rail, the second limiting plate is connected with the slider, and the positions of the first limiting plate and the second limiting plate correspond to each other; the fixed end of the fifth oil cylinder is connected with the first limiting plate, and the drive The end is connected with the second limiting plate and drives the second limiting plate to move in the horizontal direction, and a third guide post is arranged on the bracket, and the third guide post is connected with the second limiting plate.

Specifically, the clamping assembly on the workpiece side includes two second fixing columns, and the two second fixing columns are symmetrically arranged on both sides of the workbench and distributed on both sides of the L-shaped bracket, and each second fixing column is provided with Two seventh oil cylinders, the driving ends of the two seventh oil cylinders are against the first limiting plate and the second limiting plate respectively.

Specifically, the pressing assembly on the workpiece includes a third limiting plate, and a corner oil cylinder fixedly installed on the third limiting plate, there is at least one corner oil cylinder, the third limiting plate is fixedly installed on the L-shaped bracket, and the corner oil cylinder A connection plate is provided on the driving end of the drive end to drive the connection plate to move in the vertical direction, and a second guide post is vertically arranged on the connection plate, and the second guide post is located directly above the third limiting plate.

To sum up, the device of the utility model has the following advantages: the fixture is designed for the welding of heavy workpieces, the structural parts have high strength, the clamping adopts hydraulic cylinders, the clamping force is large, and it has the function of automatic positioning, which ensures the stability of the workpiece welding size .

Description of drawings

Fig. 1 is a structural schematic diagram of a welding fixture for a large workpiece;

Fig. 2 is a schematic structural view of an auxiliary feeding assembly in a welding fixture for a large workpiece;

Fig. 3 is a schematic structural view 1 of a clamping device in a welding fixture for a large workpiece;

Fig. 4 is a structural schematic diagram 2 of a clamping device in a welding fixture for a large workpiece;

Fig. 5 is a structural schematic diagram of a workpiece width positioning assembly in a welding fixture for a large workpiece;

Fig. 6 is a structural schematic diagram of the pressing assembly on the workpiece in the welding fixture of a large workpiece

Reference signs: 1 workpiece width positioning assembly; 2 auxiliary feeding assembly; 3 feeding assembly; 4 workpiece pressing assembly; 5 workpiece end face positioning assembly; 6 workpiece length positioning assembly; 7 workpiece side clamping assembly; 8 workbench ;

101 spacing slot; 102 the second spacing block; 103 expansion rod; 104 spacing pin; 105 the first spacing block; 106 the first oil cylinder; 107 fixed block;

201 the second oil cylinder; 202 the first fixed column; 203 splint; 204 the first guide column;

301L type bracket; 302 third oil cylinder; 303 first slide rail;

401 connecting plate; 402 second guide column; 403 corner oil cylinder; 404 third limiting plate;

501 the first limiting plate; 502 the fourth oil cylinder; 503 the second slide rail; 504 the second limiting plate; 505 bracket; 506 the third guide column;

601 sixth oil cylinder; 602 hydraulic cylinder; 603 jaws;

701 the seventh oil cylinder; 702 the second fixed post.

Detailed ways

Below in conjunction with Fig. 1 to Fig. 6, the utility model is further described.

A welding fixture for a large workpiece includes a workbench 8 and clamping devices respectively arranged at both ends of the workbench 8; the clamping device includes a workpiece width positioning assembly 1 for limiting the width of the workpiece, The workpiece length positioning assembly 6 for limiting the length, the workpiece side clamping assembly 7 for clamping both sides of the workpiece, the workpiece upper clamping assembly for pressing the upper end surface of the workpiece 4, and the workpiece clamping assembly for both ends of the workpiece. Positioning component 5 and feeding component 3 for the limited workpiece end face. The feeding assembly includes a first slide rail 303, a third oil cylinder 302, and an L-shaped support 301; the first slide rail 303 is fixedly installed on the workbench 8 and the first slide rail 303 is equipped with a slide table, and the bottom of the L-shaped support 301 Fixedly connected with the slide table, one end of the third oil cylinder 302 is fixedly installed on the workbench 8, and the other end is connected with the L-shaped bracket 301, and the pressing component 4 on the workpiece and the positioning component 5 of the workpiece end surface are respectively arranged on the L-shaped bracket 301.

In addition, when loading L-shaped workpieces, the workpiece is too long to be loaded manually, so four auxiliary loading components 2 are set up to prevent problems such as incomplete loading and clamping deformation during the loading process. 4 pairs of auxiliary feeding components 2 are fixedly installed on the workbench 8, and each auxiliary feeding component 2 includes a first guide column 204, a second oil cylinder 201, a splint 203, and a first fixed column 202; the first fixed column 202 is arranged on the working On one side of the table 8, the second oil cylinder 201 and the first guide column 204 are fixedly installed on the first fixed column 202, and the driving end of the second oil cylinder 201 passes through the first fixed column 202 and is connected with the splint 203. The first guide column 204 Parallel to the driving direction of the second oil cylinder 201 , multiple pairs of splints 203 of the auxiliary feeding assembly 2 are arranged opposite to each other.

The workpiece width positioning assembly 1 includes a first stop block 105, a telescopic rod 103, a first oil cylinder 106, a second stop block 102, and a fixed block 107; the first stop block 105 is arranged on one side of the workbench 8, and the first stop block 105 The driving end of the oil cylinder 106 is connected with one end of the telescopic rod 103, the fixed block 107 is provided with a limit pin 104, the telescopic rod 103 is provided with a limit groove 101, the other end of the telescopic rod 103 runs through the fixed block 107 and the limit pin 104 is inserted In the limiting groove 101 , the second limiting block 102 is fixedly installed on the other end of the telescopic rod 103 .

The workpiece length positioning assembly 6 includes two hydraulic cylinders 602 and the sixth oil cylinder 601; the two hydraulic cylinders 602 and the sixth oil cylinder 601 are arranged on the same horizontal line, and the driving end of the hydraulic cylinder 602 is provided with a jaw 603 and drives the jaw 603 up and down Moving, the driving direction of the sixth oil cylinder 601 is the horizontal direction.

The workpiece end face positioning assembly 5 includes a first limit plate 501, a second limit plate 504, a fifth oil cylinder 502, a second slide rail 503, and a bracket 505; the first limit plate 501, the second slide rail 503, and the bracket 505 are fixed Installed on the L-shaped bracket 301, a slider is arranged on the second slide rail 503, the second limiting plate 504 is connected with the slider, and the positions of the first limiting plate 501 and the second limiting plate 504 correspond; the fifth oil cylinder 502 The fixed end is connected with the first limiting plate 501, the driving end is connected with the second limiting plate 504 and drives the second limiting plate 504 to move in the horizontal direction, the bracket 505 is provided with a guide post, and the guide post is connected with the second The limiting plate 504 is connected.

The workpiece side clamping assembly 7 includes two second fixing columns 701, and the two second fixing columns 701 are symmetrically arranged on both sides of the workbench 8 and distributed on both sides of the L-shaped bracket 301, each of the second fixing columns 701 Two seventh oil cylinders 701 are arranged on the second fixing column 701 , and the driving ends of the seventh oil cylinders 701 of the two second fixing columns 701 are against the first limiting plate 501 and the second limiting plate 504 respectively.

The pressing assembly 4 on the workpiece includes a third limiting plate, and two corner oil cylinders 403 fixedly installed on the third limiting plate. Since the upper side clamps and affects feeding, the two corner oil cylinders 403 are used to weld the workpiece. The two sides of the seam are compressed, the third limiting plate 404 is fixedly installed on the L-shaped bracket 301, the driving end of the oil cylinder is provided with a connecting plate 401 and drives the connecting plate 401 to move in the vertical direction, and the connecting plate 401 is vertically arranged There is a second guide post 402, and the second guide post 402 is located directly above the third limiting plate.

The working process of the device is as follows: the oil cylinder and the hydraulic cylinder in the workpiece width positioning assembly 1 and the workpiece length positioning assembly 6 drive clamping and normalization, and the workpiece is overall clamped in length and width. The oil cylinder in the feed assembly is stretched out to cooperate with the linear guide rail to feed, and the distance in place is adjusted to position and clamp the workpiece in the length direction. The width direction also uses the oil cylinder to cooperate with the linear guide rail for positioning, and a mechanical dead stop is provided to adjust the width distance to meet The weld size of the workpiece. The oil cylinder in the auxiliary feeding assembly 2 is equipped with two guide columns to push against the workpiece, and a fixed ring is arranged on the guide shaft to adjust the distance of ejection. After the L-shaped workpiece is positioned, it is clamped to prevent the workpiece from moving and positioning inaccurately. Press the first limiting plate 501 and the second limiting plate 504 by the clamping assembly 7 on the workpiece side, thereby clamping the end face of the workpiece and then pressing the workpiece downward through the corner oil cylinder 403 in the pressing assembly 4 on the workpiece, and the workpiece is pressed against Hold the third limiting plate 404, thereby compressing the top surface of the workpiece. In this way, the vicinity of the welding seam is compressed to reduce the influence of welding deformation on the workpiece. Finally, the oil cylinder in the stepping assembly is retracted to facilitate the unloading of the workpiece, and the tooling for positioning the L-shaped workpiece is withdrawn.

From the above description, the device has the following advantages: the fixture is designed for heavy-duty workpiece welding, the structural parts have high strength, the clamping adopts hydraulic cylinder, the clamping force is large, and it has the function of automatic positioning, which ensures the stability of the welding size of the workpiece .

It can be understood that, the above specific descriptions about the utility model are only used to illustrate the utility model and are not limited to the technical solutions described in the embodiments of the utility model. Those of ordinary skill in the art should understand that the utility model can still be modified or equivalently replaced to achieve the same technical effect; as long as the use requirements are met, all are within the protection scope of the utility model.

Claims (7)

1. A welding fixture for large-scale workpieces is characterized by comprising a workbench and clamping devices respectively arranged at two ends of the workbench; the clamping device comprises a workpiece width positioning component for limiting the width of the workpiece, a workpiece length positioning component for limiting the length of the workpiece, workpiece side clamping components for clamping two sides of the workpiece, a workpiece upper pressing component for pressing the upper end surface of the workpiece, workpiece end surface positioning components for limiting two end surfaces of the workpiece, and a feeding component;

the feeding assembly comprises a first slide rail, a third oil cylinder and an L-shaped bracket; first slide rail fixed mounting in on the workstation just dispose the slip table on the first slide rail, the bottom of L type support with slip table fixed connection, the one end fixed mounting of third hydro-cylinder in on the workstation, the other end with L type leg joint, compress tightly the subassembly on the work piece with work piece terminal surface locating component set up respectively in on the L type support.

2. The welding fixture for the large-sized workpieces as recited in claim 1, wherein a plurality of pairs of auxiliary feeding assemblies are further arranged on the workbench, and each auxiliary feeding assembly comprises a first guide pillar, a second oil cylinder, a clamping plate and a first fixing pillar; the first fixing column is arranged on one side of the workbench, the second oil cylinder and the first guide pillar are fixedly mounted on the first fixing column, the driving end of the second oil cylinder penetrates through the first fixing column and then is connected with the clamping plate, the driving directions of the first guide pillar and the second oil cylinder are parallel, and the plurality of pairs of clamping plates of the auxiliary feeding assembly are arranged oppositely.

3. The welding fixture for large workpieces according to claim 1, wherein the workpiece width positioning assembly comprises a first limiting block, a telescopic rod, a first oil cylinder, a second limiting block and a fixing block; the first limiting block is arranged on one side of the workbench, the driving end of the first oil cylinder is connected with one end of the telescopic rod, a limiting pin is arranged on the fixed block, a limiting groove is formed in the telescopic rod, the other end of the telescopic rod penetrates through the fixed block, the limiting pin is inserted into the limiting groove, and the second limiting block is fixedly installed on the other end of the telescopic rod.

4. The welding fixture for large workpieces as recited in claim 1, wherein the workpiece length positioning assembly comprises two hydraulic cylinders, a sixth hydraulic cylinder; two pneumatic cylinders and sixth hydro-cylinder set up on same water flat line, the drive end of pneumatic cylinder is equipped with the clamping jaw and drives the clamping jaw reciprocates, the driving direction of sixth hydro-cylinder is the horizontal direction.

5. The welding fixture for the large-sized workpieces according to claim 1, wherein the workpiece end face positioning assembly comprises a first limiting plate, a second limiting plate, a fifth oil cylinder, a second slide rail and a bracket; the first limiting plate, the second sliding rail and the bracket are fixedly arranged on the L-shaped bracket, a sliding block is arranged on the second sliding rail, the second limiting plate is connected with the sliding block, and the first limiting plate corresponds to the second limiting plate in position; the fixed end of the fifth oil cylinder is connected with the first limiting plate, the driving end of the fifth oil cylinder is connected with the second limiting plate and drives the second limiting plate to move in the horizontal direction, a third guide pillar is arranged on the support, and the third guide pillar is connected with the second limiting plate.

6. The welding fixture for large workpieces according to claim 5, wherein the workpiece side clamping assembly comprises two second fixing columns, the two second fixing columns are symmetrically arranged on two sides of the workbench and distributed on two sides of the L-shaped support, two seventh oil cylinders are arranged on each second fixing column, and driving ends of the two seventh oil cylinders abut against the first limiting plate and the second limiting plate respectively.

7. The welding fixture for large workpieces according to claim 1, wherein the workpiece upper pressing assembly comprises a third limiting plate and at least one corner oil cylinder fixedly mounted on the third limiting plate, the third limiting plate is fixedly mounted on the L-shaped bracket, a connecting plate is arranged at a driving end of the corner oil cylinder and drives the connecting plate to move in a vertical direction, a second guide pillar is vertically arranged on the connecting plate, and the second guide pillar is located right above the third limiting plate.

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