Precise positioning device for welding of automobile seat framework

Abstract

The utility model discloses a precision positioning device for automobile seat framework welding, which comprises a leg seat and a framework bearing table fixed at the top end of the leg seat, side baffles are integrally formed at the left edge and the right edge of the top end of the framework bearing table, a cross-shaped supporting frame is arranged on one side of the leg seat, and a positioning block is arranged on the other side of the leg seat. A three-axis pushing module is installed at the top end of the cross-shaped supporting frame, and a Z-shaped clamping arm making contact with one corner point of a workpiece is installed at the Y-axis movable end of the three-axis pushing module. According to the utility model, each key part of the plate surface structure of the seat framework is effectively supported and fixed, displacement or deformation caused by thermal stress, mechanical vibration or improper operation in the welding process is reduced, and compared with single-point or few-point positioning, the positioning accuracy is improved. And the welding stress and deformation can be more effectively dispersed to the whole plate surface structure through multi-point positioning, so that the stress concentration phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seat manufacturing equipment, in particular to a precision positioning device for welding an automobile seat frame. Background Art

[0002] The positioning device used for welding automobile seat frames ensures the accurate docking and stable fixation of the seat frame components during the welding process. This type of positioning device usually consists of a base, high-precision positioning elements (such as positioning pins and clamps), and a reliable clamping mechanism. The base serves as a supporting structure, providing a stable working platform; the positioning element is responsible for accurately guiding the various components of the seat frame to the predetermined welding position to prevent offset and dislocation, and uses mechanical locking or pneumatic, hydraulic and other methods to fix the components. At the same time, combined with the limiting device and the guiding device, the accuracy and stability of its positioning are improved; as disclosed in the authorization announcement number CN208132300U, a fixing device for welding a car seat frame includes a first cylinder arranged horizontally, a sliding base plate is also arranged above the first cylinder, the outer end of the cylinder rod of the first cylinder is fixedly connected to the sliding base plate, and a sliding saddle is also fixedly arranged on the lower surface of the sliding base plate, and a sliding rail is provided on the sliding saddle for sliding cooperation, a second cylinder is arranged horizontally on the sliding base plate, and a rotator is provided at the front end of the cylinder rod of the second cylinder, and a positioning pin seat and a limiting member are provided on the sliding base plate. The positioning pin seat and the limiting member are arranged in sequence from one side of the second cylinder, and the first cylinder drives the sliding base plate to slide on the sliding rail. After the second cylinder moves along with the driving sliding base, the cylinder rod of the second cylinder extends to tighten the workpiece. Simultaneously, the workpiece is positioned by inserting a locating pin into the locating pin hole a. However, the above technical solution has limited points of action on the panel structure of the car seat frame during use, and the restraint and positioning of the panel structure of the car seat frame is insufficient. During welding, the panel structure of the car seat may undergo slight displacement or deformation due to thermal stress, mechanical vibration, or improper operation. These slight changes are difficult to completely offset or control with single-point or small-point positioning, resulting in reduced positional accuracy of the weld joint and even welding deviation. Utility Model Content

[0003] The purpose of the present utility model is to provide a precision positioning device for welding automobile seat frames, in which the frame support platform provides positional support for the left and right side walls of the panel structure of the automobile seat frame, and two symmetrical three-axis pushing modules are used to press and limit two corners of the panel structure, and the remaining two corners of the panel structure are pressed and limited by Y-shaped corner seats and a two-way sliding transmission structure that can move synchronously, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a precision positioning device for welding a car seat frame, comprising a leg seat and a skeleton support platform fixed at the top of the leg seat, and side stops are integrally formed at the left and right edge positions of the top of the skeleton support platform, a cross-shaped support is provided on one side of the leg seat, and a three-axis pushing module is installed on the top of the cross-shaped support, the Y-axis movable end of the three-axis pushing module is installed with a Z-shaped clamping arm that contacts one of the corner points of the workpiece, the other side of the top of the skeleton support platform is provided with two symmetrical Y-shaped corner seats through an inverted guide structure, the top of the skeleton support platform on one side of the Y-shaped corner seat is installed with a swing limit structure, two corner points of the skeleton support platform are installed with coil springs, the coil springs are used to force the Y-shaped corner seat to reset, the bottom end of the leg seat is installed with a two-way push transmission structure for driving the two swing limit structures to work synchronously in reverse, the surface of the leg seat is installed with a PLC control panel, the output end of the PLC control panel is electrically connected to the input end of the three-axis pushing module and the two-way push transmission structure.

[0005] Preferably, the three-axis pushing module includes an X-axis cylinder installed at the top of a cross-shaped support frame, a right-angle table fixed at the top of the X-axis cylinder piston rod, a Z-axis screw lifting module installed on the outer wall of one side of the right-angle table, and a Y-axis cylinder installed at the movable end of the Z-axis screw lifting module, and the Z-shaped clamping arm is installed at the top of the piston rod of the Y-axis cylinder.

[0006] Preferably, a front stop is integrally formed on an edge of one side of the skeleton support platform away from the Z-shaped clamping arm.

[0007] Preferably, the inverted guide structure includes an L-shaped base fixed to the top of the skeleton support platform, and an L-shaped slide slidably installed on the top of the L-shaped base, the Y-shaped corner seat is installed on the top of the L-shaped slide, and one end of the coil spring is fixedly connected to one side outer wall of the L-shaped slide.

[0008] Preferably, the swing limiting structure includes a main shaft rotatably mounted on the top of the skeleton support platform, and a baffle fixed on the top of the main shaft, and one side of the baffle is in contact with one end of the Y-shaped corner seat.

[0009] Preferably, the bidirectional sliding transmission structure includes a Y-axis screw linear module installed at the bottom end of the skeleton support platform, two symmetrical right-angle wings installed at the movable end of the Y-axis screw linear module, and a rack fixed at the end of the right-angle wing. The bottom end of the main shaft is fixed with a driven gear for meshing with the rack.

[0010] Compared with the prior art, the beneficial effect of the present invention is that the precision positioning device for welding automobile seat frames is equipped with structures such as Y-shaped corner seats and three-axis pushing modules that cooperate with each other. Through multi-point constraint and positioning, each key part of the seat frame panel structure is effectively supported and fixed, reducing the displacement or deformation caused by thermal stress, mechanical vibration or improper operation during the welding process. Compared with single-point or a few-point positioning, multi-point positioning can also more effectively disperse the welding stress and deformation to the entire panel structure, avoid the occurrence of stress concentration, and thus improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model Figure 3 ;

[0015] Figure 5 For this utility model Figure 3 A in the middle is an enlarged structural diagram;

[0016] In the figure: 1. Leg base; 2. Cross support; 3. Skeleton support platform; 301. Side stop; 302. Front stop; 4. Three-axis push module; 401. X-axis cylinder; 402. Right-angle platform; 403. Z-axis screw lifting module; 404. Y-axis cylinder; 405. Z-shaped clamping arm; 5. Inverted guide structure; 501. L-shaped base; 502. L-shaped slide; 6. Y-shaped corner seat; 7. Rotary swing limit structure; 701. Spindle; 702. Stop rod; 8. Bidirectional push transmission structure; 801. Y-axis screw linear module; 802. Right-angle wing; 803. Rack; 804. Driven gear; 9. PLC control panel; 10. Coil spring. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-5The present invention provides an embodiment of a precision positioning device for welding a car seat frame, comprising a leg seat 1 and a frame support platform 3 fixed at the top of the leg seat 1, and side guards 301 are integrally formed at the left and right edges of the top of the frame support platform 3. The frame support platform 3 serves as the basic structure of the entire welding assembly process and provides a stable support platform for the plate structure of the seat frame.

[0019] A cross-shaped support frame 2 is provided on one side of the leg seat 1, and a three-axis pushing module 4 is installed on the top of the cross-shaped support frame 2. The Y-axis movable end of the three-axis pushing module 4 is installed with a Z-shaped clamping arm 405 that contacts one of the corner points of the workpiece. The three-axis pushing module 4 controls the position of the Z-shaped clamping arm 405 on the X, Y and Z axes. Two symmetrical Y-shaped corner seats 6 are provided on the other side of the top of the skeleton support platform 3 through an inverted guide structure 5. A swing limiting structure 7 is installed on the top of the skeleton support platform 3 on one side of the Y-shaped corner seat 6. Two of the corner points of the skeleton support platform 3 are installed with coil springs 10. The coil springs 10 are used to force the Y-shaped corner seat 6 to reset. A two-way push transmission structure 8 for driving the two swing limiting structures 7 to work synchronously and in reverse is installed at the bottom end of the leg seat 1. A PLC control panel 9 is installed on the surface of the leg seat 1. The output end of the PLC control panel 9 is electrically connected to the input end of the three-axis pushing module 4 and the two-way push transmission structure 8;

[0020] The three-axis pushing module 4 includes an X-axis cylinder 401 installed at the top of the cross-shaped support frame 2, a right-angle platform 402 fixed to the top of the piston rod of the X-axis cylinder 401, a Z-axis screw lifting module 403 installed on the outer wall of one side of the right-angle platform 402, and a Y-axis cylinder 404 installed on the movable end of the Z-axis screw lifting module 403. The Z-shaped clamping arm 405 is installed at the top of the piston rod of the Y-axis cylinder 404. During the operation of the three-axis pushing module 4, the X-axis cylinder 401, the Z-axis screw lifting module 403, and the Y-axis cylinder 404 receive control signals from the PLC control panel 9, thereby respectively controlling the positions of the Z-shaped clamping arm 405 on the X, Z and Y axes to ensure the positioning accuracy and applicability of the Z-shaped clamping arm 405 to the corners of the plate structure;

[0021] A front stop 302 is integrally formed at the edge of the frame support platform 3 away from the Z-shaped clamping arm 405. The side stop 301 and the front stop 302 can respectively support and limit the left and right walls and the front wall of the seat frame panel structure;

[0022] The inverted guide structure 5 includes an L-shaped base 501 fixed to the top of the skeleton support platform 3, and an L-shaped slide 502 slidably installed on the top of the L-shaped base 501. The Y-shaped corner seat 6 is installed on the top of the L-shaped slide 502. One end of the coil spring 10 is fixedly connected to the outer wall of one side of the L-shaped slide 502. When the seat frame panel structure is welded, the Y-axis screw linear module 801 is reset. At this time, the coil spring 10 pushes the Y-shaped corner seat 6 and the L-shaped slide 502 away from the skeleton support platform 3. In this process, the L-shaped base 501 supports and guides the sliding of the L-shaped slide 502 and the Y-shaped corner seat 6, ensuring that the Y-shaped corner seat 6 slides stably.

[0023] The swing limiting structure 7 includes a main shaft 701 rotatably mounted on the top of the skeleton support platform 3, and a stopper 702 fixed on the top of the main shaft 701, and one side of the stopper 702 contacts one end of the Y-shaped corner seat 6;

[0024] The bidirectional push transmission structure 8 includes a Y-axis screw linear module 801 installed at the bottom end of the frame support platform 3, two symmetrical right-angle wings 802 installed at the movable end of the Y-axis screw linear module 801, and a rack 803 fixed at the end of the right-angle wing 802. The bottom end of the main shaft 701 is fixed with a driven gear 804 for meshing with the rack 803. When two corners of the seat frame panel structure are limited by the Z-shaped clamping arm 405 and the three-axis push module 4, the staff starts the Y-axis through the PLC control panel 9. When the screw linear module 801 is working, the Y-axis screw linear module 801 drives the right-angle wing 802 and the rack 803 to slide. During the sliding of the rack 803, its own Y-axis linear motion is converted into the rotational motion of the driven gear 804 and the main shaft 701, and then the main shaft 701 applies a thrust to one end of the Y-shaped corner seat 6, so that the Y-shaped corner seat 6 approaches the corner of the seat frame panel structure until the corner of the seat frame panel structure contacts the Y-shaped corner seat 6, and at this time the coil spring 10 is compressed.

[0025] When the embodiment of the present application is in use, first, the staff places the car seat frame panel structure to be welded on the upper surface of the frame support platform 3. The frame support platform 3 serves as the basic structure of the entire welding assembly process, providing a stable support platform for the seat frame panel structure, and the side stop 301 limits the left and right side walls of the seat frame panel structure. Then the staff controls the actuator in the device through the PLC control panel 9, so that the three-axis pushing module 4 and the two-way push transmission structure 8 are in motion. At this time, the three-axis pushing module 4 controls the position of the Z-shaped clamping arm 405 on the X, Y and Z axes. At this time, the two Z-shaped clamping arms 405 change their positions under the drive of the corresponding three-axis pushing module 4 until the Z-shaped clamping arms 405 complete the tight limit on the seat frame panel structure. The three-axis design allows the Z-shaped clamping arms 405 to be fine-tuned in three dimensions to ensure the accuracy and stability of the positioning of two corners of the seat frame panel structure. When the seat frame panel structure is pushed toward When the Y-shaped corner seat 6 moves in one direction, the bidirectional pushing transmission structure 8 synchronously drives the two symmetrical pendulum limiting structures 7 to work. At this time, the pendulum limiting structure 7 moves in the opposite direction synchronously under the action of the bidirectional pushing transmission structure 8, and then the pendulum limiting structure 7 pushes the Y-shaped corner seat 6 to the other corner point of the seat frame panel structure. At this time, the coil spring 10 is in a compressed state. The design of the Y-shaped corner seat 6 enables it to fit tightly into the corners of the panel structure, and the bidirectional pushing transmission structure 8 and the coil spring 10 use precise transmission control to enable the Y-shaped corner seat 6 to synchronously apply thrust to the panel structure, thereby realizing multi-point constraint and positioning. Through multi-point constraint and positioning, each key part of the seat frame panel structure is effectively supported and fixed, reducing the displacement or deformation caused by thermal stress, mechanical vibration or improper operation during welding. Compared with single-point or a few-point positioning, multi-point positioning can also more effectively disperse the welding stress and deformation to the entire panel structure, avoid the occurrence of stress concentration, and thus improve the welding quality.

Claims

1. A precision positioning device for welding an automobile seat frame, characterized by: The invention comprises a leg seat (1) and a skeleton support platform (3) fixed at the top of the leg seat (1), and side blocks (301) are integrally formed at the left and right edge positions of the top of the skeleton support platform (3), a cross-shaped support frame (2) is provided on one side of the leg seat (1), and a three-axis push module (4) is installed on the top of the cross-shaped support frame (2), and a Z-shaped clamping arm (405) is installed on the Y-axis movable end of the three-axis push module (4) for contacting one of the corner points of the workpiece, and two symmetrical Y-shaped corner seats (6) are provided on the other side of the top of the skeleton support platform (3) through an inverted guide structure (5). A swing limiting structure (7) is installed on the top of the skeleton support platform (3) on one side of the Y-shaped corner seat (6), and two corner points of the skeleton support platform (3) are installed with coil springs (10), which are used to force the Y-shaped corner seat (6) to reset. A two-way push transmission structure (8) for driving the two swing limiting structures (7) to work synchronously and reversely is installed at the bottom end of the leg seat (1), and a PLC control panel (9) is installed on the surface of the leg seat (1). The output end of the PLC control panel (9) is electrically connected to the input end of the three-axis push module (4) and the two-way push transmission structure (8).

2. The precise positioning device for welding an automobile seat frame according to claim 1, characterized in that: The three-axis push module (4) comprises an X-axis cylinder (401) mounted on the top of the cross-shaped support frame (2), a right-angle platform (402) fixed to the top of the piston rod of the X-axis cylinder (401), a Z-axis screw rod lifting module (403) mounted on the outer wall of one side of the right-angle platform (402), and a Y-axis cylinder (404) mounted on the movable end of the Z-axis screw rod lifting module (403), and the Z-shaped clamping arm (405) is mounted on the top of the piston rod of the Y-axis cylinder (404).

3. The precise positioning device for welding an automobile seat frame according to claim 1, characterized in that: A front stop (302) is integrally formed on the edge of one side of the skeleton support platform (3) away from the Z-shaped clamping arm (405).

4. The precise positioning device for welding an automobile seat frame according to claim 1, characterized in that: The inverted guide structure (5) comprises an L-shaped base (501) fixed on the top of the skeleton support platform (3), and an L-shaped slide (502) slidably installed on the top of the L-shaped base (501), the Y-shaped corner seat (6) is installed on the top of the L-shaped slide (502), and one end of the coil spring (10) is fixedly connected to the outer wall of one side of the L-shaped slide (502).

5. The precise positioning device for welding an automobile seat frame according to claim 1, characterized in that: The swing limiting structure (7) comprises a main shaft (701) rotatably mounted on the top of the skeleton support platform (3), and a stop rod (702) fixed to the top of the main shaft (701), wherein one side of the stop rod (702) contacts one end of the Y-shaped corner seat (6).

6. The precise positioning device for welding an automobile seat frame according to claim 5, characterized in that: The bidirectional push transmission structure (8) comprises a Y-axis screw linear module (801) mounted on the bottom end of the skeleton support platform (3), two symmetrical right-angle wings (802) mounted on the movable end of the Y-axis screw linear module (801), and a rack (803) fixed to the end of the right-angle wing (802); and a driven gear (804) for meshing with the rack (803) is fixed to the bottom end of the main shaft (701).

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