Back-rest chair leg assembly welding tool

Abstract

The utility model provides a welding tool for a backrest chair leg assembly, which is convenient in welding operation, can ensure the welding consistency of products, and improves the welding working efficiency of the backrest chair leg assembly. Comprising a bottom plate, a supporting and positioning block assembly used for supporting and positioning a workpiece and a positioning assembly used for limiting the workpiece are arranged on the bottom plate, and the bottom plate is assembled on a positioner. The positioning assembly comprises a workpiece outer side positioning assembly used for limiting the outer side face of the workpiece and a workpiece surface positioning assembly used for limiting the upper surface of the workpiece, and the supporting positioning block assembly, the workpiece outer side positioning assembly and the workpiece surface positioning assembly are all arranged in the size direction of the workpiece. And a welding opening is formed in the bottom plate at the workpiece welding position.

Description

Technical Field

[0001] The utility model relates to the technical field of welding jigs, and particularly relates to a welding jig for a backrest chair leg assembly. Background Art

[0002] During the production and processing of seats, the backrest chair leg assembly of the seat is welded by multiple metal structural parts. Currently, it is mostly that several metal structural parts are manually placed on the ground or platform in the shape of a seat back, and then the joints between each metal structural part are manually welded, or multiple pipe segments are welded on the metal structural parts to ensure the strength of the skeleton. However, when corresponding metal plates need to be welded on the metal structural parts, the operator not only needs to manually fix the metal structural parts and metal plates, but also has to perform welding operations at the same time, and the welding operation is relatively difficult. In addition, some of the skeletons of the existing backrest chair leg assemblies are arc-shaped structures. When placing some arc-shaped metal pipes, it is difficult to ensure that they are fixed in the specified position, resulting in the position of the arc-shaped metal pipes being prone to deviation. During welding, the position differences between each metal structural part are relatively large, it is difficult to ensure the consistency of the product, and the welding work efficiency of the backrest chair leg assembly is greatly reduced. Content of the Utility Model

[0003] Aiming at the above problems, the utility model provides a welding jig for a backrest chair leg assembly, which is convenient for welding operation, can ensure the welding consistency of the product, and improve the welding work efficiency of the backrest chair leg assembly.

[0004] The utility model adopts the following technical scheme. A welding jig for a backrest chair leg assembly includes a bottom plate. A support and positioning block assembly for supporting and positioning a workpiece and a positioning assembly for limiting the workpiece are arranged on the bottom plate. The bottom plate is assembled on a positioner. The positioning assembly includes a workpiece outer side positioning assembly for limiting the outer side of the workpiece and a workpiece surface positioning assembly for limiting the upper surface of the workpiece. The support and positioning block assembly, the workpiece outer side positioning assembly, and the workpiece surface positioning assembly are all arranged along the dimension direction of the workpiece, and a welding port is opened on the bottom plate at the welding position of the workpiece.

[0005] Further, a first station and a second station are arranged on the bottom plate, and the support and positioning block assembly, the workpiece outer side positioning assembly, and the workpiece surface positioning assembly are all arranged on the first station and the second station.

[0006] Further, the workpiece is divided into a pipe section metal workpiece and a sheet metal workpiece. The support and positioning block assembly includes a support and positioning block. The support and positioning block is L-shaped, and a baffle is installed on one side of the support and positioning block. The pipe section metal workpiece is placed on the support and positioning block.

[0007] Further, the outer positioning assembly of the workpiece includes a cylinder seat and a first telescopic cylinder mounted on the cylinder seat. The cylinder seat is assembled on the bottom plate located on one side of the installation position of the pipe section metal workpiece. The piston rod of the first telescopic cylinder extends until it abuts against the outer side surface of the pipe section metal workpiece;

[0008] Further, the surface positioning assembly of the workpiece includes a first rotary pressing cylinder mounted on the bottom plate. A first rotary pressing plate is connected to the first rotary pressing cylinder. The first rotary pressing plate is driven by the first rotary pressing cylinder to rotate and press down until it contacts the upper surface of the pipe section metal workpiece;

[0009] Further, a cylinder cushion plate is provided on the bottom plate at the welding position of the pipe section metal workpiece and the sheet metal workpiece. The cylinder cushion plate straddles both ends of the weld joint located at the first station, and cushion blocks are provided at both ends of the weld joint. A second rotary pressing cylinder and a second rotary pressing plate connected to the second rotary pressing cylinder are mounted on the cylinder cushion plate. A first positioning plate is connected between the cushion blocks at both ends. The sheet metal workpiece is placed on the first positioning plate. The second rotary pressing plate is driven by the second rotary pressing cylinder to rotate and press down until it contacts the sheet metal workpiece;

[0010] Further, a U-shaped positioning block is mounted on the first positioning plate. A U-shaped positioning groove is formed between the first positioning plate and the U-shaped positioning block. The sheet metal workpiece is placed in the U-shaped positioning groove;

[0011] Further, a first installation groove is formed on the first positioning plate at the position of the U-shaped positioning groove. A first magnetic adsorbent is provided in the first installation groove;

[0012] Further, a second positioning plate is mounted on the bottom plate at the second station. A second telescopic cylinder and a third telescopic cylinder are mounted on the second positioning plate from top to bottom. A positioning pin is connected to the second telescopic cylinder. The positioning pin is driven by the second telescopic cylinder to extend until it contacts the sheet metal workpiece. The piston rod of the third telescopic cylinder extends until it contacts the outer side surface of the pipe section metal workpiece;

[0013] Further, a limiting block is provided on the bottom plate at the second station. The limiting block is U-shaped; a cushion block is mounted at the side end of the weld joint at the second station. A connecting plate is provided on the cushion block. L-shaped positioning blocks are mounted at both ends of the connecting plate. A second installation groove is formed on the connecting plate between the L-shaped positioning blocks at both ends. A second magnetic adsorbent is provided in the second installation groove.

[0014] The beneficial effects of the present utility model are as follows. On the base plate along the dimension direction of the workpiece, there are arranged a support and positioning block assembly, an outer-side positioning assembly of the workpiece, and a surface positioning assembly of the workpiece. And the base plate is assembled on the positioner. After the workpiece is supported and positioned by the support and positioning block assembly, it can be respectively positioned on the outer side and the surface through the outer-side positioning assembly of the workpiece and the surface positioning assembly of the workpiece. During the welding operation, it is not necessary for the operator to fix the workpiece by hand, which facilitates the welding operation. At the same time, it can adapt to the position differences between workpieces, ensure the consistency of welded products, thereby improving the welding work efficiency of the backrest chair leg assembly, ensuring the welding quality, and having good use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the assembled three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is the assembled front-view structural schematic diagram of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the present utility model after hiding the workpiece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] As Figure 1 , Figure 2 , Figure 3 shown, a welding tooling for a backrest chair leg assembly of the present utility model includes a base plate 1. On the base plate 1, there are arranged a support and positioning block assembly 2 for supporting and positioning the workpiece and a positioning assembly for limiting the workpiece. The base plate 1 is assembled on a positioner (not shown in the figure). The positioning assembly includes an outer-side positioning assembly 3 of the workpiece for limiting the outer side of the workpiece and a surface positioning assembly 4 of the workpiece for limiting the upper surface of the workpiece. The support and positioning block assembly 2, the outer-side positioning assembly 3 of the workpiece, and the surface positioning assembly 4 of the workpiece are all arranged along the dimension direction of the workpiece. And a welding opening 5 is formed on the base plate 1 at the welding position of the workpiece.

[0019] On the base plate 1, there are arranged a first working station 6 and a second working station 7. On both the first working station 6 and the second working station 7, there are arranged a support and positioning block assembly 2, an outer-side positioning assembly 3 of the workpiece, and a surface positioning assembly 4 of the workpiece. The workpiece is divided into a pipe-section metal workpiece 8 and a sheet-metal workpiece 9. The support and positioning block assembly 2 includes a support and positioning block 10. The support and positioning block 10 is L-shaped, and a baffle 11 is installed on one side of the support and positioning block 10. The pipe-section metal workpiece 8 is placed on the support and positioning block 10.

[0020] The outer-side positioning assembly 3 of the workpiece includes a cylinder seat 12 and a first telescopic cylinder 13 installed on the cylinder seat 12. The cylinder seat 12 is assembled on the base plate 1 on one side of the installation position of the pipe-section metal workpiece 8. The piston rod of the first telescopic cylinder 13 extends until it abuts against the outer side of the pipe-section metal workpiece 8.

[0021] The workpiece surface positioning assembly 4 includes a first rotary pressing cylinder 14 mounted on the bottom plate 1. The first rotary pressing plate 15 is connected to the first rotary pressing cylinder 14. The first rotary pressing plate 15 is driven by the first rotary pressing cylinder 14 to rotate and press down until it contacts the upper surface of the pipe section metal workpiece 8.

[0022] A cylinder backing plate 16 is provided on the bottom plate 1 at the welding position of the pipe section metal workpiece 8 and the sheet metal workpiece 9. The cylinder backing plate 16 straddles both ends of the weld joint 5 at the first station 6, and lifting blocks 17 are provided at both ends of the weld joint 5. A second rotary pressing cylinder 18 and a second rotary pressing plate 19 connected to the second rotary pressing cylinder 18 are mounted on the cylinder backing plate 16. A first positioning plate 20 is connected between the lifting blocks 17 at both ends. The sheet metal workpiece 9 is placed on the first positioning plate 20. The second rotary pressing plate 19 is driven by the second rotary pressing cylinder 18 to rotate and press down until it contacts the sheet metal workpiece 9. A U-shaped positioning block 21 is mounted on the first positioning plate 20. A U-shaped positioning groove 22 is formed between the first positioning plate 20 and the U-shaped positioning block 21. The sheet metal workpiece 9 is placed in the U-shaped positioning groove 22. A first installation groove 23 is formed in the first positioning plate 20 at the position of the U-shaped positioning groove 22, and a first magnetic attachment 24 is provided in the first installation groove 23.

[0023] A second positioning plate 25 is mounted on the bottom plate 1 at the second station 7. A second telescopic cylinder 26 and a third telescopic cylinder 27 are mounted on the second positioning plate 25 from top to bottom. A positioning pin 28 is connected to the second telescopic cylinder 26. The positioning pin 28 is driven by the second telescopic cylinder 26 to extend until it contacts the sheet metal workpiece 9. The piston rod of the third telescopic cylinder 27 extends until it contacts the outer side surface of the pipe section metal workpiece 8. A limiting block 29 is provided on the bottom plate 1 at the second station 7. The limiting block 29 is U-shaped. A cushion block 30 is mounted on the side end of the weld joint 5 at the second station 7. A connecting plate 31 is provided on the cushion block 30. L-shaped positioning blocks 32 are mounted at both ends of the connecting plate 31. A second installation groove 33 is formed in the connecting plate 31 between the L-shaped positioning blocks 32 at both ends, and a second magnetic attachment 34 is provided in the second installation groove 33.

[0024] In the present utility model, the bottom plate 1 is provided with screw holes, and the bottom plate 1 can be assembled on the positioner through the corresponding screw holes. A welding robot (not shown in the figure) can be arranged on one side of the bottom plate 1. Then, during welding, welding operations for two workstations can be carried out simultaneously. That is, the welding operation between the pipe section metal workpiece 8 and the sheet metal workpiece 9 is carried out at the first workstation 6, and the welding operations between the pipe section metal workpiece 8 and the sheet metal workpiece 9, and between the pipe section metal workpiece 8 and the pipe section metal workpiece 8 are carried out at the second workstation 7, thereby improving the welding efficiency. After the welding at the first workstation 6 is completed, the welded workpiece can be manually placed on the second workstation 7. Among them, the support and positioning block assembly 2, the workpiece outer positioning assembly 3, the workpiece surface positioning assembly 4, the limit block 29, etc. at the second workstation 7 can be arranged according to the size and orientation of the workpiece. Then, after the welding of the current surface of the workpiece is completed, the bottom plate 1 is flipped by the positioner to weld the other surface of the workpiece, further improving the welding efficiency, so as to be able to adapt to the position differences between workpieces, ensure the consistency of the welded products, and ensure the welding quality.

[0025] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding tool for a backrest chair leg assembly, characterized in that: It includes a base plate, on which are provided a support and positioning block assembly for supporting and positioning a workpiece, and a positioning assembly for limiting the workpiece; the base plate is assembled on a positioner; the positioning assembly includes a workpiece outer side positioning assembly for limiting the outer side surface of the workpiece, and a workpiece surface positioning assembly for limiting the upper surface of the workpiece; the support and positioning block assembly, the workpiece outer side positioning assembly, and the workpiece surface positioning assembly are all arranged along the size of the workpiece, and a welding port is opened on the base plate at the welding position of the workpiece; the workpiece is divided into a pipe metal workpiece and a sheet metal workpiece; the support and positioning block assembly includes a support and positioning block, and the support and positioning block is L-shaped. A baffle is installed on one side of the support positioning block, and the pipe section metal workpiece is placed on the support positioning block; the workpiece outer side positioning assembly includes a cylinder seat and a first telescopic cylinder installed on the cylinder seat, and the cylinder seat is assembled on the base plate located on one side of the installation position of the pipe section metal workpiece, and the piston rod of the first telescopic cylinder is extended until it abuts against the outer side surface of the pipe section metal workpiece; the workpiece surface positioning assembly includes a first rotary downward pressing cylinder installed on the base plate, and a first rotary pressing plate is connected to the first rotary downward pressing cylinder, and the first rotary pressing plate is driven by the first rotary downward pressing cylinder to rotate and press until it contacts the upper surface of the pipe section metal workpiece.

2. The welding tool for a backrest chair leg assembly according to claim 1, characterized in that: The bottom plate is provided with a first station and a second station, and the first station and the second station are both provided with the support positioning block assembly, the workpiece outer side positioning assembly, and the workpiece surface positioning assembly.

3. The welding tool for a backrest chair leg assembly according to claim 2, characterized in that: A cylinder gasket is provided on the bottom plate located at the welding position between the pipe section metal workpiece and the sheet metal workpiece, and the cylinder gasket is arranged across the two ends of the welding port located at the first workstation, and heightening blocks are provided at both ends of the welding port, and a second rotary downward-pressing cylinder and a second rotary pressure plate connected to the second rotary downward-pressing cylinder are installed on the cylinder gasket, and a first positioning plate is connected between the heightening blocks at both ends, and the sheet metal workpiece is placed on the first positioning plate, and the second rotary pressure plate is driven by the second rotary downward-pressing cylinder to rotate and press down until it contacts the sheet metal workpiece.

4. The welding tool for a backrest chair leg assembly according to claim 3, characterized in that: The first positioning plate is provided with a U-shaped positioning block, a U-shaped positioning groove is formed between the first positioning plate and the U-shaped positioning block, and the sheet metal workpiece is placed in the U-shaped positioning groove.

5. The welding tool for backrest chair leg assembly according to claim 4, characterized in that: A first installation slot is formed on the first positioning plate at the position of the U-shaped positioning slot, and a first magnetic adsorption component is disposed in the first installation slot.

6. The welding tool for a backrest chair leg assembly according to claim 2, characterized in that: A second positioning plate is installed on the bottom plate located at the second workstation, and a second telescopic cylinder and a third telescopic cylinder are installed on the second positioning plate from top to bottom. A positioning pin is connected to the second telescopic cylinder, and the positioning pin is extended by the second telescopic cylinder until it contacts the sheet metal workpiece, and the piston rod of the third telescopic cylinder is extended until it contacts the outer side surface of the pipe section metal workpiece.

7. The welding tool for a backrest chair leg assembly according to claim 2, characterized in that: A limit block is provided on the bottom plate located at the second workstation, and the limit block is U-shaped; a cushion block is installed on the side end of the welding port located at the second workstation, and a connecting plate is provided on the cushion block, and L-shaped positioning blocks are installed at both ends of the connecting plate, and a second installation groove is opened on the connecting plate between the L-shaped positioning blocks at both ends, and a second magnetic adsorption component is provided in the second installation groove.

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