Welding clamp for automobile seat net frame

Abstract

The utility model discloses an automobile seat net frame welding clamp. The automobile seat net frame welding clamp comprises a bottom plate, two clamp units, a middle positioning piece and a middle limiting piece. The two clamp units are arranged on the bottom plate in a manner of being opposite to mirror images; the middle positioning piece is arranged on the bottom plate and is positioned between the two clamp units, and is used for positioning a part which is jointly fixed on the two clamp units; the middle limiting part is arranged on the bottom plate and located between the two clamp units, and the middle limiting part is used for fixing the two clamp units and limiting the lap joint parts. All scattered rod parts, sheet metal parts and coating parts can be welded and formed at a time, distributed welding is avoided, and production efficiency and welding quality are improved.

Description

Technical Field

[0001] The utility model relates to the field of welding jigs, in particular to a welding jig for an automobile seat net frame. Background Art

[0002] The automobile seat net frame is an integrated seat frame assembly for the three-person seat in the back row of the automobile. Its structure is as Figure 1 、 Figure 2 shown. It generally includes frame members, sheet metal parts, head painting parts and lower painting parts. Specifically, the frame members are composed of multiple rods with different shapes welded and fixed to each other. Currently, conventional welding jigs cannot hold and fix all the rod components, sheet metal parts, painting parts, etc. of the entire seat frame assembly at one time, so that the overall welding process needs to be completed step by step. For example, some rods are first welded into a small assembly, and then all the small assemblies are spliced and fixed and then welded into a complete seat frame assembly. Such step-by-step welding requires more processes, and when welding each part separately and then limiting and fixing it, and finally splicing the whole together, the welding thermal deformation error will be magnified, resulting in low product quality. Summary of the Utility Model

[0003] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a welding jig for an automobile seat net frame, which can weld all the scattered rod parts, sheet metal parts and painting parts into a whole at one time, avoid distributed welding, and improve production efficiency and welding quality.

[0004] The purpose of the present utility model is achieved by the following technical solutions:

[0005] A welding jig for an automobile seat net frame includes: a bottom plate, two jig units, a middle positioning member and a middle limiting member; the two jig units are arranged on the bottom plate in a relatively mirror-image manner; the middle positioning member is arranged on the bottom plate between the two jig units to position the parts commonly fixed on the two jig units; the middle limiting member is arranged on the bottom plate between the two jig units to limit the parts separately fixed and lapped on the two jig units.

[0006] The jig unit includes:

[0007] A frame member fixing assembly, which is arranged on the bottom plate to limit and fix the rods in the automobile seat net frame;

[0008] A sheet metal part fixing assembly, which is arranged on the bottom plate and is provided with a sheet metal accommodating groove for limiting and positioning the sheet metal part to fix the sheet metal part in the automobile seat net frame;

[0009] A head painting part fixing assembly, which is arranged on the bottom plate and is provided with a head groove for protecting the surface and insulating the head painting part to limit and fix the head painting part;

[0010] The lower painting part fixing assembly is arranged on the bottom plate and is provided with a U-shaped lower groove for protecting the surface and insulating the lower painting part and a painting positioning part for lateral pressure limiting thereof.

[0011] Furthermore, the frame part fixing assembly includes:

[0012] A plurality of flat pressing parts are arranged on the bottom plate to limit and fix the rods in the automobile seat net frame on the horizontal plane;

[0013] A plurality of supporting parts are arranged on the bottom plate and are located in the area with large span of the rods in the automobile seat net frame to limit and support the rods;

[0014] A plurality of inclined pressing parts are arranged on the bottom plate to limit and fix the rods in the automobile seat net frame in the inclined area in the vertical direction.

[0015] Furthermore, the flat pressing part includes:

[0016] At least one flat pressing seat is vertically arranged on the bottom plate, and a horizontal limiting groove is arranged on the upper end surface;

[0017] A flat pressing clamp cylinder is vertically arranged on the bottom plate;

[0018] Horizontal pressing arms with the same number as the flat pressing seats are hinged on the telescopic end of the flat pressing clamp cylinder; as the flat pressing clamp cylinder rises and falls, the horizontal pressing arms will close or open the upper end of the flat pressing seat.

[0019] Furthermore, the supporting part includes:

[0020] At least one horizontal supporting seat is vertically arranged on the bottom plate, and a horizontal supporting groove is arranged on the upper end surface;

[0021] At least one inclined supporting seat is vertically arranged on the bottom plate, the upper end surface is inclined, and an inclined supporting groove is arranged on the upper end surface.

[0022] Furthermore, the inclined pressing part includes:

[0023] At least one inclined pressing seat is vertically arranged on the bottom plate, the upper end surface is inclined, and an inclined limiting groove is arranged on the end surface;

[0024] An inclined pressing clamp cylinder is vertically arranged on the bottom plate;

[0025] Inclined pressing arms with the same number as the inclined pressing seats are hinged on the telescopic end of the flat pressing clamp cylinder; as the inclined pressing clamp cylinder rises and falls, the inclined pressing arms will close or open the upper end of the inclined pressing seat.

[0026] Furthermore, the sheet metal part fixing assembly includes:

[0027] A sheet metal column is vertically arranged on the bottom plate, and a horizontal sheet metal groove located on a horizontal plane is provided on the upper end surface;

[0028] Two accommodating parts are respectively arranged on both sides of the sheet metal column, and an accommodating sheet metal groove is provided on the upper surface; positioning protrusions are provided on the accommodating sheet metal groove;

[0029] A sheet metal clamping cylinder is arranged on one side of the sheet metal column;

[0030] Two sheet metal pressing arms are hinged on the telescopic end of the sheet metal clamping cylinder; as the sheet metal clamping cylinder rises and falls, the sheet metal pressing arms clamp or move away from the two accommodating sheet metal grooves.

[0031] Further, the sheet metal fixing component further includes:

[0032] Two clamping sheet metal parts are respectively arranged on the accommodating parts;

[0033] Two in-position sensors are respectively arranged between the two clamping sheet metal parts, are clamped and fixed by the clamping sheet metal parts, and the detection ends face the accommodating sheet metal grooves.

[0034] Further, the head painting part fixing component includes:

[0035] A head column is vertically arranged on the bottom plate, and a U-shaped head groove is provided on the upper end surface; the head column is made of insulating engineering plastic;

[0036] A head clamping cylinder is arranged on one side of the head column;

[0037] A head pressing arm is hinged on the telescopic end of the head clamping cylinder; as the head clamping cylinder rises and falls, the head pressing arm closes or opens the upper end of the head column;

[0038] A slag baffle is arranged on the head pressing arm to shield the head painting part.

[0039] Further, the lower painting part fixing component includes:

[0040] A lower column is vertically arranged on the bottom plate, and an inwardly concave U-shaped lower groove is provided on the upper end surface; the lower column is made of insulating engineering plastic;

[0041] Two lower parts are respectively arranged on both sides of the lower column; on the opposite sides of the two lower parts, accommodating lower grooves are provided, the lower parts are made of insulating engineering plastic, and the accommodating lower grooves and the U-shaped lower groove are coplanar;

[0042] A painting positioning part is arranged on the bottom plate, facing the gap between the two lower parts, and closes or opens the upper end opening of the U-shaped lower groove.

[0043] Further, the painting positioning part includes:

[0044] The painting cylinder is horizontally arranged on the bottom plate.

[0045] The painting rod is coaxially arranged with the painting cylinder and faces the gap between the two lower components. A conical surface is provided at the end of the painting rod. When the painting cylinder extends, the painting rod extends into the gap between the two lower components to close the upper end of the U-shaped lower groove. When the painting cylinder shortens, the painting rod retracts away from the gap between the two lower components to open the upper end of the U-shaped lower groove.

[0046] Due to the adoption of the above technical solutions, the present utility model has the following advantages:

[0047] 1. According to the overall structure of the automotive seat net frame, the jigs are symmetrically arranged, reducing the design difficulty and the manufacturing difficulty, and at the same time, it can reduce the automatic welding programming and lower the overall design difficulty of the welding process.

[0048] 2. By adopting the modular limit fixing structure of the frame fixing component for similar and homogeneous (rod-like) parts, the types of jigs used can be reduced. For special parts (sheet metal parts, painted parts), targeted design adjustments are made according to the requirements of their welding parts, part shapes, and surface treatments to ensure limit fixing while meeting the protection of their positions and shapes.

[0049] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent description, and to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings of the present utility model are described as follows:

[0051] Figure 1 It is a top view structural schematic diagram of the automotive seat net frame.

[0052] Figure 2 It is a three-dimensional structural schematic diagram of the automotive seat net frame.

[0053] Figure 3 It is a three-dimensional structural schematic diagram when the welding jig of the automotive seat net frame in the embodiment is in use.

[0054] Figure 4 It is a top view structural schematic diagram when the welding jig of the automotive seat net frame in the embodiment is in use.

[0055] Figure 5 It is for Figure 4 The enlarged structural schematic diagram at position A in

[0056] Figure 6 It is for Figure 5 The structural schematic diagram at the B-B section in

[0057] Figure 7 is Figure 4 The enlarged structure schematic diagram at position C in

[0058] Figure 8 is Figure 7 The structure schematic diagram at the D-D section in

[0059] Figure 9 is Figure 4 The enlarged structure schematic diagram at position E in

[0060] Figure 10 is Figure 9 The structure schematic diagram at the F-F section in

[0061] Figure 11 is Figure 4 The enlarged structure schematic diagram at position G in

[0062] Figure 12 is Figure 11 The structure schematic diagram at the H-H section in

[0063] Figure 13 is Figure 4 The enlarged structure schematic diagram at position J in

[0064] Figure 14 is Figure 13 The structure schematic diagram at the K-K section in

[0065] Figure 15 is Figure 4 The enlarged structure schematic diagram at position L in

[0066] Figure 16 is Figure 15 The structure schematic diagram at the M-M section in

[0067] Figure 17 is Figure 15 The structure schematic diagram at the N-N section in

[0068] Figure 18 is Figure 4 The enlarged structure schematic diagram at position P in

[0069] Figure 19 is Figure 18 The structure schematic diagram at the Q-Q section in

[0070] Figure 20 is Figure 18 The structure schematic diagram at the R-R section in

[0071] Figure 21 is Figure 4 The enlarged structure schematic diagram at position S in

[0072] Figure 22 is Figure 21 Schematic diagram of the structure at the T-T section in

[0073] Figure 23 is Figure 4 Enlarged schematic diagram of the structure at the U position in

[0074] Figure 24 is Figure 18 Schematic diagram of the structure at the V-V section in

[0075] Figure 25 is Figure 18 Schematic diagram of the structure at the W-W section in

[0076] In the figure: 1. Bottom plate; 2. Middle positioning part; 3. Middle limiting part; 411. Flat pressing seat; 4111. Horizontal limiting groove; 412. Flat pressing clamp cylinder; 413. Horizontal pressing arm; 421. Horizontal supporting seat; 4211. Horizontal supporting groove; 422. Inclined supporting seat; 4221. Inclined supporting groove; 431. Inclined pressing seat; 4311. Inclined limiting groove; 432. Inclined pressing clamp cylinder; 433. Inclined pressing arm; 51. Sheet metal column; 511. Horizontal sheet metal groove; 52. Accommodating part; 521. Accommodating sheet metal groove; 522. Positioning protrusion; 53. Sheet metal pressing clamp cylinder; 54. Sheet metal pressing arm; 55. Clamping plate part; 56. In-position sensor; 61. Head column; 611. Head groove; 62. Head pressing clamp cylinder; 63. Head pressing arm; 64. Slag baffle; 71. Lower column; 711. U-shaped lower groove; 72. Lower part; 721. Accommodating lower groove; 73. Painting positioning part; 731. Painting cylinder; 732. Painting rod; 81. Frame part; 82. Sheet metal part; 83. Upper painting part; 84. Lower painting part. Specific implementation mode

[0077] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0078] Embodiment:

[0079] As Figure 3-25 shown, an automobile seat net frame welding fixture includes: a bottom plate 1, two fixture units, a middle positioning part 2 (adopting the structure of a horizontal supporting seat 421) and a middle limiting part 3 (adopting the structure of a flat pressing part); the two fixture units are arranged on the bottom plate 1 in a relatively mirror-image manner; the middle positioning part 2 is arranged on the bottom plate 1 between the two fixture units to position the components commonly fixed on the two fixture units; the middle limiting part 3 is arranged on the bottom plate 1 between the two fixture units to limit the components respectively fixed and overlapped on the two fixture units;

[0080] The fixture unit includes:

[0081] The frame member 81 fixing assembly is arranged on the bottom plate 1 to limit and fix the rods in the automotive seat net frame;

[0082] The sheet metal part 82 fixing assembly is arranged on the bottom plate 1 and is provided with a receiving sheet metal groove 521 for limiting and positioning the sheet metal part 82 to fix the sheet metal part 82 in the automotive seat net frame;

[0083] The head painting part fixing assembly is arranged on the bottom plate 1 and is provided with a head groove 611 for protecting the surface and insulating the head painting part to limit and fix the head painting part;

[0084] The lower painting part fixing assembly is arranged on the bottom plate 1 and is provided with a U-shaped lower groove 711 for protecting the surface and insulating the lower painting part 84 and a painting positioning part 73 for laterally pressing and limiting it.

[0085] According to the overall structure of the automotive seat net frame, the jigs are symmetrically arranged to reduce the design difficulty and the production and manufacturing difficulty. At the same time, the automatic welding programming can be reduced, and the overall design difficulty of the welding process can be lowered. By adopting the modular limiting and fixing structure of the frame fixing assembly for similar and homogeneous (rod-like) parts, the types of jigs used can be reduced; for special parts (sheet metal part 82, painting parts), targeted design adjustments are made according to the requirements of their welding parts, part shapes, and surface treatments to ensure limiting and fixing while meeting the protection of their positions and shapes.

[0086] In this embodiment, the frame member 81 fixing assembly includes:

[0087] Several flat pressing parts are arranged on the bottom plate 1 to limit and fix the rods in the automotive seat net frame on the horizontal plane;

[0088] Several supporting parts are arranged on the bottom plate 1 and are located in the areas with large spans of the rods in the automotive seat net frame to limit and support the rods;

[0089] Several inclined pressing parts are arranged on the bottom plate 1 to limit and fix the rods in the inclined areas in the vertical direction of the automotive seat net frame.

[0090] According to the rod shapes and structures of the frame members 81, the areas of their horizontal rods and inclined rods are set for limiting and fixing, and supporting parts are arranged for large-span and bending or inclined places to prevent the rods from bending downward under the action of gravity.

[0091] In this embodiment, the flat pressing part includes:

[0092] At least one flat pressing seat 411 is vertically arranged upward on the bottom plate 1, and a horizontal limiting groove 4111 is provided on the upper end surface;

[0093] The flat pressing clamp cylinder 412 is vertically arranged upward on the bottom plate 1;

[0094] A horizontal pressing arm 413 with the same quantity as the flat pressing seat 411 is hinged on the telescopic end of the flat pressing clamp cylinder 412; along with the lifting of the flat pressing clamp cylinder 412, the upper end of the flat pressing seat 411 is closed or opened by the horizontal pressing arm 413.

[0095] Adopt a conventional cylinder pressing fixture structure.

[0096] In this embodiment, the supporting member includes:

[0097] At least one horizontal supporting seat 421 is vertically arranged on the bottom plate 1, and a horizontal supporting groove 4211 is provided on the upper end surface;

[0098] At least one inclined supporting seat 422 is vertically arranged on the bottom plate 1, the upper end surface is inclined, and an inclined supporting groove 4221 is provided on the upper end surface.

[0099] In this embodiment, the inclined pressing member includes:

[0100] At least one inclined pressing seat 431 is vertically arranged on the bottom plate 1, the upper end surface is inclined, and an inclined limiting groove 4311 is provided on the end surface;

[0101] An inclined pressing clamp cylinder 432 is vertically arranged on the bottom plate 1;

[0102] An inclined pressing arm 433 with the same quantity as the inclined pressing seat 431 is hinged on the telescopic end of the flat pressing clamp cylinder 412; along with the lifting of the inclined pressing clamp cylinder 432, the upper end of the inclined pressing seat 431 is closed or opened by the inclined pressing arm 433.

[0103] Adopt a conventional cylinder pressing fixture structure.

[0104] In this embodiment, the sheet metal part 82 fixing assembly includes:

[0105] A sheet metal column 51 is vertically arranged on the bottom plate 1, and a horizontal sheet metal groove 511 located on a horizontal plane is provided on the upper end surface;

[0106] Two accommodating parts 52 are respectively arranged on both sides of the sheet metal column 51, and an accommodating sheet metal groove 521 is provided on the upper surface; a positioning protrusion 522 is provided on the accommodating sheet metal groove 521;

[0107] A sheet metal pressing clamp cylinder 53 is arranged on one side of the sheet metal column;

[0108] Two sheet metal pressing arms are hinged on the telescopic end of the sheet metal pressing clamp cylinder 53; along with the lifting of the sheet metal pressing clamp cylinder 53, the sheet metal pressing arms buckle or move away from the two accommodating sheet metal grooves 521.

[0109] The sheet metal is limited by the sheet metal accommodating groove 521 on the accommodating member 52, positioned by the positioning protrusion 522, and finally fixed by the sheet metal pressing arm. Meanwhile, in order to ensure the relative correct position of the sheet metal and the rod member of the frame member 81, a sheet metal column 51 is provided, and the rod member of the frame member 81 is limited and positioned through the horizontal plate member groove.

[0110] In this embodiment, the sheet metal part 82 fixing assembly further includes:

[0111] Two clamping plate members 55, respectively arranged on the accommodating member 52;

[0112] Two in-position sensors 56, respectively arranged between the two clamping plate members 55, clamped and fixed by the clamping plate members 55, and the detection ends face the sheet metal accommodating groove 521.

[0113] The clamping plate member 55 adopts an up-and-down clamping structure form to clamp and fix the outer sensor, and the in-position sensor 56 is used to detect whether the sheet metal is placed in place before welding.

[0114] In this embodiment, the head painting part fixing assembly includes:

[0115] A head column 61, vertically arranged on the bottom plate 1, and the upper end surface is provided with a U-shaped head groove 611; the head column 61 is made of insulating engineering plastic;

[0116] A head pressing pliers cylinder 62, arranged on one side of the head column 61;

[0117] A head pressing arm 63, hinged on the telescopic end of the head pressing pliers cylinder 62; as the head pressing pliers cylinder 62 rises and falls, the head pressing arm 63 closes or opens the upper end of the head column 61;

[0118] A slag baffle 64, arranged on the head pressing arm 63 to shield the head painting part.

[0119] The head column 61 made of insulating engineering plastic can avoid high current passing through the upper painting part 83 during welding, avoid the electrochemical reaction between the painting surface and the current from damaging the painting surface, and at the same time, the engineering plastic can also avoid scratching and damaging the painting surface when taking it.

[0120] In this embodiment, the lower painting part fixing assembly includes:

[0121] A lower column 71, vertically arranged on the bottom plate 1, and the upper end surface is provided with an inward concave U-shaped lower groove 711; the lower column 71 is made of insulating engineering plastic;

[0122] Two lower parts 72, respectively arranged on both sides of the lower column 71; the opposite side surfaces of the two lower parts 72 are provided with lower accommodating grooves 721, the lower parts 72 are made of insulating engineering plastic, and the lower accommodating grooves 721 and the U-shaped lower groove 711 are coplanar;

[0123] The painting positioning member 73 is arranged on the bottom plate 1, facing the gap between the two lower members 72, and closes or opens the upper end opening of the U-shaped lower groove 711.

[0124] The painting positioning member 73 includes:

[0125] The painting cylinder 731 is horizontally arranged on the bottom plate 1,

[0126] The painting rod 732 is coaxially arranged with the painting cylinder 731, facing the gap between the two lower members 72, and a conical surface is provided at the end of the painting rod 732; the painting rod 732 extends into the gap between the two lower members 72 under the elongation of the painting cylinder 731 to close the upper end of the U-shaped lower groove 711; the painting rod 732 retracts away from the gap between the two lower members 72 under the shortening of the painting cylinder 731 to open the upper end of the U-shaped lower groove 711.

[0127] The lower painting part 84 is accommodated through the U-shaped lower groove 711 on the lower column 71 and the accommodating lower groove 721 on the lower member 72, and the lower painting part 84 is limited and fixed by the painting rod 732.

[0128] The welding fixture for the automobile seat net frame in this embodiment is used as follows. Control all the horizontal clamping cylinder, the inclined clamping cylinder 432, the plate clamping cylinder 53, the head clamping cylinder 62, and the painting cylinder 731 to shorten, so that the horizontal limit, the inclined limit groove, the horizontal sheet metal groove 511, the accommodating sheet metal groove 521, the head groove 611, and the lower groove are completely opened.

[0129] All the rods of the frame member 81 (including the head painting part and the lower painting part 84) are sequentially placed into all the corresponding grooves in the present utility model, and then the sheet metal is placed into the corresponding accommodating sheet metal groove 521. Finally, control all the horizontal clamping cylinder, the inclined clamping cylinder 432, the plate clamping cylinder 53, the head clamping cylinder 62, and the painting cylinder 731 to elongate, so that the horizontal limit, the inclined limit groove, the horizontal sheet metal groove 511, the accommodating sheet metal groove 521, the head groove 611, and the lower groove are closed, and at the same time, all the rods and the sheet metal are limited and fixed.

[0130] Finally, start the welding equipment to weld all the rods and the plate parts together. After welding is completed, control all the horizontal clamping cylinder, the inclined clamping cylinder 432, the plate clamping cylinder 53, the head clamping cylinder 62, and the painting cylinder 731 to shorten, so that the horizontal limit, the inclined limit groove, the horizontal sheet metal groove 511, the accommodating sheet metal groove 521, the head groove 611, and the lower groove are completely opened. Then take out the welded assembly.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A welding fixture for a car seat mesh frame, characterized in that: include: A bottom plate, two clamp units, a middle positioning member and a middle limiting member; the two clamp units are arranged on the bottom plate in mirror images; the middle positioning member is arranged on the bottom plate between the two clamp units to position the components fixed together on the two clamp units; the middle limiting member is arranged on the bottom plate between the two clamp units to limit the components fixed and overlapped on the two clamp units; The fixture unit comprises: A frame member fixing assembly is arranged on the bottom plate to limit and fix the rod members in the automobile seat net frame; The sheet metal fixing assembly is arranged on the bottom plate and is provided with a sheet metal accommodating groove for limiting and positioning the sheet metal, so as to fix the sheet metal in the mesh frame of the automobile seat; The head coating part fixing assembly is arranged on the bottom plate and is provided with a head groove for protecting and insulating the surface of the head coating part and limiting and fixing the head coating part; The lower coating part fixing assembly is arranged on the bottom plate and is provided with a U-shaped lower groove for protecting and insulating the surface of the lower coating part and a coating positioning part for its side pressure limiting.

2. The automobile seat mesh frame welding fixture according to claim 1, characterized in that: The frame fixing assembly includes: A plurality of flat pressing parts are arranged on the bottom plate to limit and fix the rods in the net frame of the automobile seat on the horizontal plane; A plurality of supporting members are arranged on the bottom plate, and the rods in the mesh frame of the automobile seat are in the area of ​​large span, and the rods are limited and supported; A plurality of inclined pressing members are arranged on the bottom plate to limit and fix the inclined areas of the rods in the automobile seat net frame in the vertical direction.

3. The automobile seat mesh frame welding fixture according to claim 2, characterized in that: The flat pressing piece comprises: At least one flat pressing seat is vertically arranged on the bottom plate and has a horizontal limit groove on its upper end surface; The flat pressing forceps cylinder is vertically arranged on the bottom plate; The horizontal pressing arms, which have the same number as the flat pressing seats, are hinged on the telescopic end of the flat pressing clamp cylinder; as the flat pressing clamp cylinder rises and falls, the horizontal pressing arms close or open the upper end of the flat pressing seat.

4. The automobile seat mesh frame welding fixture according to claim 2, characterized in that: The supporting member comprises: At least one horizontal supporting seat is vertically arranged on the bottom plate and has a horizontal supporting groove on its upper end surface; At least one inclined supporting seat is vertically upwardly arranged on the bottom plate, the upper end surface is inclined, and an inclined supporting groove is arranged on the upper end surface.

5. The automobile seat mesh frame welding fixture according to claim 2, characterized in that: The oblique pressure piece comprises: At least one inclined pressing seat is vertically upwardly arranged on the bottom plate, the upper end surface is inclined, and the end surface is provided with an inclined limiting groove; The oblique pressure clamp cylinder is vertically upwardly arranged on the bottom plate; The inclined pressure arms, which have the same number as the inclined pressure seats, are hinged on the telescopic end of the flat pressing clamp cylinder; as the inclined pressure clamp cylinder rises and falls, the inclined pressure arms close or open the upper end of the inclined pressure seats.

6. The automobile seat mesh frame welding fixture according to claim 1, characterized in that: The sheet metal fixing assembly comprises: A sheet metal column is vertically arranged on the bottom plate, and an upper end surface is provided with a horizontal sheet metal groove located on a horizontal plane; Two receiving parts are respectively arranged on both sides of the sheet metal column, and the upper surface is provided with a sheet metal receiving groove; the sheet metal receiving groove is provided with a positioning protrusion; A plate pressing clamp cylinder is arranged on one side of the plate column; Two sheet metal pressing arms are hinged on the telescopic ends of the sheet metal pressing clamp cylinder; as the sheet metal pressing clamp cylinder rises and falls, the sheet metal pressing arms press or move away from the two sheet metal accommodating grooves.

7. The automobile seat mesh frame welding fixture according to claim 6, characterized in that: The sheet metal fixing assembly also includes: Two clamping plate members are respectively arranged on the receiving members; Two in-position sensors are respectively arranged between two clamping plate members, and are clamped and fixed by the clamping plate members, with the detection ends facing the accommodating sheet metal grooves.

8. The automobile seat mesh frame welding fixture according to claim 1, characterized in that: The head coating part fixing assembly comprises: The head column is vertically arranged on the bottom plate, and the upper end surface is provided with a U-shaped head groove; the head column is made of insulating engineering plastics; A head pressing clamp cylinder is arranged on one side of the head column; The head pressing arm is hinged on the telescopic end of the head pressing clamp cylinder; as the head pressing clamp cylinder rises and falls, the head pressing arm closes or opens the upper end of the head column; The slag blocking plate is arranged on the head pressure arm to shield the head coating parts.

9. The automobile seat mesh frame welding fixture according to claim 1, characterized in that: The lower coating part fixing assembly comprises: The lower column is vertically arranged on the bottom plate, and the upper end surface is provided with a concave U-shaped lower groove; the lower column is made of insulating engineering plastic material; Two lower parts are respectively arranged on both sides of the lower column; the two lower parts are provided with lower accommodating grooves on opposite sides, the lower parts are made of insulating engineering plastics, and the lower accommodating grooves and the U-shaped lower grooves are coplanar; The coating positioning piece is arranged on the bottom plate, facing the gap between the two lower parts, and closing or opening the upper end opening of the U-shaped lower groove.

10. The automobile seat mesh frame welding fixture according to claim 9, characterized in that: The coating positioning member comprises: The coating cylinder is horizontally set on the bottom plate. The coating rod is coaxially arranged with the coating cylinder and faces the gap between the two lower parts. The end of the coating rod is provided with a conical surface. When the coating cylinder is extended, the coating rod extends into the gap between the two lower parts to close the upper end of the U-shaped lower groove. When the coating cylinder is shortened, the coating rod retreats away from the gap between the two lower parts to open the upper end of the U-shaped lower groove.

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