Automatic pre-assembling device for car side wall welding

Abstract

In order to solve the problems of high labor intensity, poor working environment and low efficiency of the existing car side wall welding pre-assembling method, the present application provides a car side wall welding automatic pre-assembling device, which comprises a feeding mechanism and a folding mechanism; the feeding mechanism comprises a lifting mechanism and a positioning mechanism; the lifting mechanism comprises a lifting frame and a linear slide rail; the lifting frame comprises a base, a support, a lifting arm and a lifting claw; the positioning mechanism comprises X-direction positioning mechanism, Y-direction positioning mechanism and Z-direction positioning mechanism and is arranged on the same vertical plane; the buckle folding mechanism is arranged at the buckle position after the car side wall is positioned to the welding setting position, and the number of the buckle folding mechanism is the same as that of the buckle and is arranged in front of each buckle. The present application has the beneficial technical effects of using machinery to complete the positioning and buckle folding of the car side wall, simplifying the operation, improving the efficiency and saving manpower and resources.

Description

TECHNICAL FIELD

[0001] The present application relates to a car side wall welding pre-assembly technology, in particular to a car side wall welding automatic pre-assembly device. BACKGROUND

[0002] Car side wall welding refers to welding the left and right side walls of the car body on the bottom plate. The side wall refers to the door frame and the fender and trunk support of the left and right sides of the car, which is the main component of the car body (see attached Figure 1 , in the figure, A is a car side wall, and B is a conveying frame). Generally, the car side wall and the car bottom plate are fixedly connected together by automatic welding, that is, the car side wall and the car bottom plate are welded together by using an automatic welding machine (i.e. a robot) on an assembly line. In order to ensure the accuracy of the weld, the car side wall and the car bottom plate are pre-fixed by using a buckle, so as to ensure that the car side wall is welded at the set position of the car bottom plate. The buckle refers to a structure in which two metal parts are connected together by metal deformation, including an L-shaped folded edge and a corresponding edge. Generally, the L-shaped folded edge is arranged on one metal part that needs to be connected (such as the car bottom plate), and the corresponding edge is arranged at the corresponding position of the other metal part that needs to be connected (such as the bottom of the car side wall). When the two parts need to be connected together, the corresponding edge is overlapped and placed on the inner side of the L-shaped folded edge, and a manual hammer or a special folding tool is used to fold the protruding part of the L-shaped folded edge and firmly wrap the corresponding edge, so as to realize the fixed connection between the two parts (see attached Figure 2 , in the figure, a is an L-shaped folded edge, and b is a corresponding edge). In addition, the process of pre-fixing the car side wall on the car bottom plate by using the buckle is called pre-assembly. Generally, a plurality of L-shaped folded edges and corresponding edges (i.e. buckles) corresponding to each other are arranged at the joint part of the car bottom plate and the car side wall. For example, in a certain type of car, a horizontal forward buckle I is arranged at the joint part of the car side wall trunk support and the car bottom plate, a vertical upward buckle II and a buckle III are arranged at the joint part of the car side wall front and rear door frame bottom and the car bottom plate, and a vertical downward buckle IV is arranged at the joint part of the car side wall fender support and the car bottom plate, a total of four buckles. Among them, the vertical downward buckle IV at the joint part of the fender support and the bottom plate is a double buckle structure (i.e. a structure composed of two buckles arranged side by side), and the others are single buckle structures (see attached Figure 1 ).

[0003] The prior art car side wall welding pre-assembly method uses a conveying frame to lift the car side wall and transmit it to the side of the car bottom plate (see attached Figure 1, in the figure, A is a car side wall, B is a conveying frame, because the conveying frame is not provided with a positioning mechanism, after the car side wall is conveyed to the side of the car floor, the car side wall can only be located near the set position of the car side wall welding (at this time the corresponding edge and the L-shaped folded edge are not overlapped together), and manual placement of the car side wall to the set position (at this time the corresponding edge and the L-shaped folded edge are overlapped together) is required. Then, a hammer or a special folding tool is used to fold the L-shaped folded edge one by one, so as to complete the pre-assembling process of the car side wall and the car floor.

[0004] Obviously, the prior art car side wall welding pre-assembling method has problems of high labor intensity, poor working environment and low efficiency. SUMMARY

[0005] In order to solve the problems of high labor intensity, poor working environment and low efficiency in the prior art car side wall welding pre-assembling method, the present application provides a car side wall welding automatic pre-assembling device.

[0006] The car side wall welding automatic pre-assembling device of the present application comprises a feeding mechanism and a folding mechanism; the feeding mechanism comprises a lifting mechanism and a positioning mechanism; the lifting mechanism comprises a lifting frame and a linear slide rail; the lifting frame comprises a base, a support, a lifting arm and a lifting claw; the base is a rectangular frame structure, is arranged on the linear slide rail, and a feeding driving mechanism for driving the base to move back and forth along the linear slide rail is arranged on the rear side of the base; the support is a herringbone-shaped support and has two, is arranged on the left and right sides of the base respectively, a lifting arm is arranged on the top of the support, and a lifting claw is arranged on the end of the lifting arm; the linear slide rail has two and is arranged on the two sides of the base and is laid between the pre-assembling feeding position of the car side wall and the welding set position of the car side wall; the positioning mechanism comprises X-direction positioning mechanism, Y-direction positioning mechanism and Z-direction positioning mechanism and is arranged on the same vertical plane; the folding mechanism is arranged at the position of the car side wall after being positioned to the welding set position, the number of the folding mechanism is the same as that of the buckles and is arranged in front of each buckle.

[0007] Further, the X-direction positioning mechanism comprises a positioning baffle and a pushing mechanism; the positioning baffle is arranged on the left side of the base and comprises an L-shaped guide rod and a baffle; one end of the L-shaped guide rod is fixed on the left front side of the base through a sliding groove, and the other end is fixedly connected with the baffle; the pushing mechanism is arranged on the ground on the right front side of the base and corresponds to the positioning baffle; comprises a base, a pushing cylinder and a pushing head, the base is fixed on the ground on the right front side of the base, the pushing cylinder is fixed on the upper surface of the base, and the pushing head is fixed on the piston end of the pushing cylinder and opposite to the positioning baffle; the piston of the pushing cylinder pushes the pushing head to move forward, pushes the car side wall to move left, until the car side wall is pushed between the positioning baffle and the pushing mechanism, so as to realize X-direction positioning.

[0008] Further, the Y-direction positioning mechanism comprises positioning bases and a lower crossbeam pressing plate. The two positioning bases are arranged on the bases below the front and rear door frames of the car body side after the car body side is positioned on the lifting frame. The lower crossbeam pressing plate is arranged on the base between the two positioning bases and comprises a rotating mechanism and a rotating pressing plate. The rotating mechanism is fixed on the base, and the rotating pressing plate is fixed on the end of the rotating mechanism. A rectangular step is arranged on the rotating pressing plate. When the rotating pressing plate is rotated to the vertical position, the rectangular step on the rotating pressing plate is just clamped on the lower crossbeam of the car body side, so that the Y-direction positioning is realized.

[0009] Further, the Z-direction positioning mechanism comprises a positioning column and a positioning support. The positioning column is arranged on the base opposite to the position of the reference hole on the lower crossbeam of the car body side and comprises a cylinder and a piston. The piston part is also the positioning column, and the diameter of the positioning column matches the reference hole on the lower crossbeam of the car body side. The positioning support comprises a support plate, a support cylinder and a support claw. The support plate is fixed on the upper horizontal bar of the right side support, the support cylinder is fixed on the support plate, and the support claw is fixed on the piston end of the support cylinder. The support position of the support claw is just at the middle upper part of the B column of the car body side, and the support distance is accurate to the vertical state of the car body side.

[0010] Further, the folding mechanism comprises a folding cylinder and a folding head. The folding cylinder is arranged in front of the buckle, and the folding head comprises a folding bottom plate, a U-shaped support and a roller. The folding bottom plate is fixed on the piston front end of the folding cylinder, the U-shaped support is fixed on the middle part of the bottom plate, and an opening is arranged in the transverse middle part of the U-shaped support, so that the two opposite edges of the U-shaped support form two parallel roller supports. The roller is installed in the roller support, and the gap between the two parallel rollers is opposite to the buckle.

[0011] Further, the folding mechanism is a double folding head folding mechanism, that is, two U-shaped supports and rollers are arranged side by side on the folding bottom plate, and a guide seat is arranged between the two U-shaped supports. The guide seat is higher than the roller, a guide groove is arranged in the longitudinal center of the guide seat, and a V-shaped opening is arranged at the front end of the guide groove. In addition, the middle lines of the two rollers of the folding head on both sides of the guide seat are on the same straight line with the middle line of the guide groove.

[0012] Furthermore, the folding mechanism is located at the position of the latches after the side panel of the car is positioned to the welding setting position. The number of folding mechanisms is the same as the number of latches and they are located directly in front of each latch. Specifically, when the side panel of the car is in the welding setting position, a folding mechanism is laterally arranged via a support in front of the joint between the rear trunk support and the car floor of the side panel, with the gap between the two parallel rollers directly facing the latches; a double-folding head folding mechanism is arranged via a base plate below the joint between the fender support and the car floor of the side panel, with the gap between the two parallel rollers facing upwards directly towards the latches; and a folding mechanism is arranged on the support column via a telescopic mechanism at the bottom of the front and rear door frames of the side panel and above the joint between the rear door frame and the car floor of the side panel, with the gap between the two parallel rollers directly facing the latches.

[0013] Furthermore, the telescopic mechanism includes a fixed frame, a guide rail, an extension cylinder mounting base, an extension cylinder, and a hinge mechanism; the fixed frame is fixedly connected to the support column; the guide rail includes a slide rail and a slide block, the slide rail is fixedly connected to the bottom of the fixed frame, and a folding mechanism is fixedly connected to the slide block with the folding head facing downwards; the extension cylinder mounting base is fixedly connected to the outside of the fixed frame; the extension cylinder is fixedly connected to the extension cylinder mounting base; one end of the hinge mechanism is connected to the end of the piston of the telescopic cylinder, and the other end is connected to the rear side of the folding mechanism.

[0014] The beneficial technical effect of the automatic pre-assembly device for welding car side panels of the present invention is that it uses machinery to complete the positioning and fastening of car side panels, which simplifies the operation, improves efficiency, and saves manpower and material resources. Attached Figure Description

[0015] Appendix Figure 1 This is a three-dimensional schematic diagram of the side panel of a car.

[0016] Appendix Figure 2 A 3D schematic diagram of the hook and loop fastener;

[0017] Appendix Figure 3 This is a three-dimensional schematic diagram of the automatic pre-assembly device for welding the side panels of a car according to the present invention;

[0018] Appendix Figure 4 This is a partial three-dimensional schematic diagram from another angle of the automatic pre-assembly device for welding the side panel of a car according to the present invention;

[0019] Appendix Figure 5 This is a partial three-dimensional schematic diagram of the Y-axis positioning mechanism of the present invention;

[0020] Appendix Figure 6 This is a three-dimensional schematic diagram of the positioning column of the Z-axis positioning mechanism of the present invention;

[0021] Appendix Figure 7 This is a three-dimensional schematic diagram of the Z-axis positioning mechanism positioning support of the present invention;

[0022] AppendixFigure 8 Fig. 3 is a three-dimensional view of the buckle folding mechanism of the present application;

[0023] Fig. 2 is a three-dimensional view of the buckle folding mechanism of the present application; Figure 9 Fig. 4 is a three-dimensional view of the double folding head folding mechanism of the present application;

[0024] Figure 10 Fig. 5 is a three-dimensional view of the welding setting position of the automatic pre-assembly device for welding of the side wall of a car of the present application;

[0025] Fig. 6 is a three-dimensional view of the telescopic mechanism of the present application. Figure 11

[0026] The automatic pre-assembly device for welding of the side wall of a car of the present application will be further described in connection with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0027] Fig. 4 is a three-dimensional view of the double folding head folding mechanism of the present application; Figure 3 Figure 4 ​​​Another angle's partial three-dimensional schematic view of the automatic pre-assembling device for car side wall welding of the present application; in the figure, 1 is a lifting frame, 1-1 is a base, 1-2 is a support, 1-3 is a lifting support arm, 1-4 is a lifting claw, 2 is a linear slide rail; 3-1 is a positioning baffle, 3-1-1 is an L-shaped guide rod, 3-1-2 is a baffle, 3-2 is a pushing mechanism, 3-2-1 is a base, 3-2-2 is a pushing cylinder, 3-3-3 is a pushing head, 4-1 is a positioning base, 4-2 is a lower cross beam pressing plate, 4-2-1 is a rotating mechanism, 4-2-2 is a rotating pressing plate, 5-1 is a positioning column, 5-2 is a positioning support, 6 is a buckle folding mechanism. As can be seen from the figure, the automatic pre-assembling device for car side wall welding of the present application comprises a feeding mechanism and a folding mechanism; the feeding mechanism comprises a lifting mechanism and a positioning mechanism; the lifting mechanism comprises a lifting frame 1 and a linear slide rail 2; the lifting frame 1 comprises a base 1-1, a support 1-2, a lifting support arm 1-3 and a lifting claw 1-4; the base 1-1 is a rectangular frame structure, arranged on the linear slide rail 2, and a feeding drive mechanism for driving the base 1-1 to move back and forth along the linear slide rail 2 is arranged on the rear side of the base; the support 1-2 is a herringbone-shaped support and there are two of them, arranged on the left and right sides of the base 1-1 respectively, and a lifting support arm 1-3 is arranged on the top of the support 1-2, and a lifting claw 1-4 is arranged at the end of the lifting support arm 1-3; the linear slide rail 2 is two, arranged on the two sides of the base 1-1 respectively, and laid between the pre-assembling feeding position of the car side wall and the welding setting position of the car side wall; the positioning mechanism comprises an X-direction positioning mechanism, a Y-direction positioning mechanism and a Z-direction positioning mechanism and is arranged on the same vertical plane; the folding mechanism is arranged at the buckle position after the car side wall is positioned to the welding setting position, and the number of the folding mechanism is the same as that of the buckles and is arranged in front of each buckle. As can be seen, when the automatic pre-assembling device for car side wall welding of the present application is used for pre-assembling, the mechanical arm conveys the car side wall to one side of the lifting frame, the lifting support arm extends to hold the upper cross beam of the two door frames of the side wall, and the X-direction positioning mechanism, the Y-direction positioning mechanism and the Z-direction positioning mechanism arranged on the same vertical plane fix the car side wall from the X-direction, the Y-direction and the Z-direction respectively and keep it on the vertical plane. The feeding drive mechanism drives the base to move forward along the linear slide rail to the welding setting position of the car side wall, and since the car side wall is accurately positioned and fixed on the lifting frame, it can be accurately fed to the welding setting position of the car side wall, at this time, the corresponding edges of each buckle and the L-shaped folded edge overlap together. The buckle folding mechanism arranged in front of each buckle moves forward, thereby folding the protruding part of the L-shaped folded edge and firmly wrapping the corresponding edges, thereby completing the pre-assembling of the car side wall.

[0028] As one of the preferred schemes, the X-direction positioning mechanism comprises a positioning baffle 3-1 and a pushing mechanism 3-2; the positioning baffle is arranged on the left side of the base 1-1 and comprises an L-shaped guide rod 3-1-1 and a baffle 3-1-2; one end of the L-shaped guide rod is fixed on the left front side of the base 1-1 through a sliding groove, and the other end is fixedly connected with the baffle 3-1-2; the pushing mechanism 3-2 is arranged on the ground on the right front side of the base 1-1 and corresponds to the positioning baffle 3-1; and the pushing mechanism 3-2 comprises a base 3-2-1, a pushing cylinder 3-2-2 and a pushing head 3-2-3, the base 3-2-1 is fixed on the ground on the right front side of the base 1-1, the pushing cylinder 3-2-2 is fixed on the upper surface of the base 3-2-1, and the pushing head 3-2-3 is fixed on the piston end of the pushing cylinder and corresponds to the positioning baffle; the piston of the pushing cylinder pushes the pushing head 3-2-3 to move forward, pushes the side wall of the car to move left, and pushes the side wall of the car between the positioning baffle 3-1 and the pushing mechanism 3-2, so that the X-direction positioning is realized. In the way of one end resisting and one end pushing, the X-direction positioning of the side wall of the car can be realized in a relatively loose condition. Even if the position of the side wall of the car is not very accurate after the mechanical arm lifts the side wall of the car to the position, the side wall of the car can be accurately positioned.

[0029] attached Figure 5 Fig. 4 is a partial three-dimensional schematic view of a Y-direction positioning mechanism of the present application, wherein A is a side wall of a car, 4-2-1 is a rotating mechanism, 4-2-2 is a rotating pressing plate, and 5-1 is a positioning column. Fig. 5 is a three-dimensional schematic view of a Z-direction positioning mechanism of the present application, wherein A is a side wall of a car, 5-1 is a positioning column, 5-2 is a rotating mechanism, and 5-3 is a rotating pressing plate. Figure 3 、 4 As one of the preferred schemes, the Y-direction positioning mechanism comprises a positioning base 4-1 and a lower cross beam pressing plate 4-2; the positioning base 4-1 is two and is arranged on the base 1-1 below the front and rear door frames of the side wall of the car after the side wall of the car is positioned on the lifting frame; the lower cross beam pressing plate 4-2 is arranged on the base 1-1 between the two positioning bases 4-1 and comprises a rotating mechanism 4-2-1 and a rotating pressing plate 4-2-2; the rotating mechanism 4-2-1 is fixed on the base 1-1, the rotating pressing plate 4-2-2 is fixed on the end of the rotating mechanism 4-2-1, and a rectangular step is arranged on the rotating pressing plate 4-2-2; when the rotating pressing plate is rotated to a vertical position, the rectangular step on the rotating pressing plate is just clamped on the lower cross beam of the side wall of the car, so that the Y-direction positioning is realized. In the way of supporting on both sides and clamping in the middle, the Y-direction positioning of the side wall of the car is realized, which is not only accurate and firm, but also lays a foundation for the next step of inserting the positioning column into the reference hole.

[0030] attached Figure 6 Fig. 5 is a three-dimensional schematic view of a Z-direction positioning mechanism of the present application, wherein A is a side wall of a car, 5-1 is a positioning column, 5-2 is a rotating mechanism, and 5-3 is a rotating pressing plate. Figure 7This is a three-dimensional schematic diagram of the Z-axis positioning mechanism and positioning support of the present invention. In the figure, A represents the side panel of a car, 4-2-1 is the rotating mechanism, 4-2-2 is the rotating pressure plate, 5-1 is the positioning post, 5-2-1 is the support plate, 5-2-2 is the support cylinder, and 5-2-3 is the support claw. See appendix. Figure 3 , 4 As one preferred embodiment, the Z-axis positioning mechanism includes a positioning post 5-1 and a positioning support 5-2. The positioning post 5-1 is located on the base 1-1 directly opposite the reference hole on the lower crossbeam of the car side panel, and includes a cylinder and a piston. The piston part is also a positioning post, and the diameter of the positioning post matches the reference hole on the lower crossbeam of the car side panel. The positioning support 5-2 includes a support plate 5-2-1, a support cylinder 5-2-2, and a support claw 5-2-3. The support plate 5-2-1 is fixed on the crossbar in the upper middle part of the right side bracket 1-2. The support cylinder 5-2-2 is fixed on the support plate 5-2-1. The support claw 5-2-3 is fixed on the piston end of the support cylinder 5-2-2, and the support position of the support claw 5-2-3 is exactly in the upper middle part of the B-pillar of the car side panel. The support distance is based on the car side panel maintaining a vertical state. By inserting positioning pins into the reference holes on the lower crossbeam of the car side panel, the positioning accuracy of the car side panel can be further calibrated. At the same time, positioning supports are used to maintain the car side panel in a numerical state, so that the car side panel can be accurately positioned on the feeding mechanism. This ensures that the car side panel is conveyed to the car side panel welding setting position and that the corresponding edges of each buckle and the L-shaped fold overlap together.

[0031] Appendix Figure 8 This is a three-dimensional schematic diagram of the folding mechanism of the present invention. In the figure, a is an L-shaped folding edge, b is the corresponding edge, 6-1 is a folding cylinder, 6-2 is a folding head, 6-2-1 is a folding base plate, 6-2-2 is a U-shaped support, and 6-2-3 is a roller. As shown in the figure, as one of the preferred embodiments, the fastener folding mechanism 6 includes a folding cylinder 6-1 and a folding head 6-2. The folding cylinder 6-1 is located directly in front of the fastener. The folding head 6-2 includes a folding base plate 6-2-1, a U-shaped support 6-2-2, and a roller 6-2-3. The folding base plate 6-2-1 is fixed to the front end of the piston of the folding cylinder. The U-shaped support 6-2-2 is fixed to the middle of the base plate 6-2-1, and an opening is provided in the transverse middle of the U-shaped support 6-2-2, so that the two opposite sides of the U-shaped support 6-2-2 form two parallel roller supports. The roller 6-2-3 is installed inside the roller supports, and the gap between the two parallel rollers is directly opposite the fastener. Using a double-roller extrusion method to fold the L-shaped edge is not only accurate and reliable, ensuring quality, but also prevents damage to the L-shaped edge and ensures durability.

[0032] Appendix Figure 9This is a three-dimensional schematic diagram of the double-folding head folding mechanism of the present invention. In the figure, a is an L-shaped fold, b is the corresponding edge, 6-1 is a folding cylinder, 6-2 is a folding head, 6-2-1 is a folding base plate, 6-2-2 is a U-shaped support, 6-2-3 is a roller, and 6-2-4 is a guide seat. As shown in the figure, as one of the preferred embodiments, the buckle folding mechanism is a double-folding head folding mechanism, that is, two U-shaped supports 6-2-2 and rollers 6-2-3 are arranged side by side on the folding base plate 6-2-1, and a guide seat 6-2-4 is arranged between the two U-shaped supports; the guide seat 6-2-4 is higher than the roller, and a guide groove is provided in its longitudinal center, and a V-shaped opening is provided at the front end of the guide groove; furthermore, the center line of the two rollers of the folding head on both sides of the guide seat is on the same straight line as the center line of the guide groove. Clearly, the double-folding head folding mechanism is designed to meet the requirements of double-fastener folding. The guide seat ensures that the fasteners on both sides will not shift during folding, thus guaranteeing the folding effect.

[0033] Appendix Figure 10 This is a three-dimensional schematic diagram of the automatic pre-assembly device for welding the side panel of a car in the present invention when it is in the welding setting position. In the figure, 1-1 is the base, 1-2 is the bracket, 4-1 is the positioning base, 4-2 is the lower crossbeam pressure plate, 5-1 is the positioning column, 5-2 is the positioning support, 6 is the folding mechanism, 7 is the telescopic mechanism, 8 is the base plate, and 9 is the support. As shown in the figure, the folding mechanism 6 of this invention is located at the position of the latches after the side panel of the car is positioned to the welding setting position. The number of folding mechanisms is the same as the number of latches, and they are positioned directly in front of each latch. Specifically, when the side panel of the car is in the welding setting position, a folding mechanism 6 is laterally arranged via a support 9 in front of the joint between the rear trunk support and the car floor of the side panel, with the gap between the two parallel rollers facing the latches; a double-folding head folding mechanism is arranged via a base plate 8 below the joint between the fender support and the car floor of the side panel, with the gap between the two parallel rollers facing upwards towards the latches; and a folding mechanism 6 is arranged on the support column via a telescopic mechanism 7 above the joint between the front and rear door frames and the car floor of the side panel, with the gap between the two parallel rollers facing the latches. Clearly, this arrangement of the folding mechanism is to accommodate the following: Figure 1 The image shows a pre-assembled model of a certain type of sedan. This sedan has four latches. A horizontally forward latch (I) is located at the junction of the side panel rear trunk support and the floor. A vertically upward latch (II) and latch (III) are located at the junctions of the bottom of the front and rear door frames of the side panel and the floor. A vertically downward latch (IV) is located at the junction of the side panel fender support and the floor. Furthermore, the vertically downward latch (IV) at the junction of the fender support and the floor is a double-hook structure (i.e., a structure consisting of two latches side-by-side), while the others are single-hook structures (see appendix). Figure 1 ).

[0034] Appendix Figure 11As shown in the figure, 7-1 is a fixed frame, 7-2 is a guide rail, 7-3 is an extension cylinder fixing base, 7-4 is an extension cylinder, and 7-5 is a hinged mechanism. As can be seen from the figure, the telescopic mechanism comprises the fixed frame 7-1, the guide rail 7-2, the extension cylinder fixing base 7-3, the extension cylinder 7-4 and the hinged mechanism 7-5. The fixed frame 7-1 is fixedly connected with a support column. The guide rail 7-2 comprises a sliding rail and a sliding seat. The sliding rail is fixedly connected at the bottom of the fixed frame 7-1. The sliding seat is fixedly connected with the buckle folding mechanism 6, and the folding head is arranged downward. The extension cylinder fixing base 7-3 is fixedly connected outside the fixed frame. The extension cylinder 7-4 is fixedly connected on the extension cylinder fixing base 7-3. One end of the hinged mechanism 7-5 is connected with the end of the telescopic cylinder piston, and the other end is connected with the rear side of the folding mechanism 6. The two vertically downward folding mechanisms are arranged in a telescopic structure, which is beneficial to the lifting and positioning of the car side wall. The car side wall is conveyed to the position of the feeding mechanism of the mechanical arm in the form of hoisting. If the two vertically downward folding mechanisms are in the working position at this time, the car side wall will be placed in the set position. The telescopic mechanism is adopted to make the folding mechanism in the retracted position, so that the car side wall can smoothly enter the set position and be accurately positioned on the lifting frame of the feeding mechanism.

[0035] The car side wall welding automatic pre-assembling device has the beneficial technical effects that the positioning and buckle folding of the car side wall are completed by a machine, the operation is simplified, the efficiency is improved, and the manpower and material resources are saved.

Claims

1. A car side wall welding automatic pre-assembling device, characterized in that, The device comprises a feeding mechanism and a folding mechanism; the feeding mechanism comprises a lifting mechanism and a positioning mechanism; the lifting mechanism comprises a lifting frame and a linear slide rail; the lifting frame comprises a base, a support, a lifting arm and a lifting claw; the base is a rectangular frame structure, arranged on the linear slide rail, and a feeding driving mechanism for driving the base to move forward and backward along the linear slide rail is arranged on the rear side of the base; the support is a herringbone-shaped support and there are two supports, respectively arranged on the left and right sides of the base, a lifting arm is arranged on the top of the support, and a lifting claw is arranged on the end of the lifting arm; the linear slide rail is two linear slide rails, respectively arranged on the two sides of the base and laid between the pre-piling position of the car side wall and the welding setting position of the car side wall; the positioning mechanism comprises an X-direction positioning mechanism, a Y-direction positioning mechanism and a Z-direction positioning mechanism and is arranged on the same vertical plane; the folding mechanism is arranged at the position of the car side wall after being positioned to the welding setting position, the number of the folding mechanisms is the same as that of the buckles and the folding mechanisms are arranged in front of the buckles; wherein the X-direction positioning mechanism comprises a positioning baffle and a pushing mechanism; the positioning baffle is arranged on the left side of the base and comprises an L-shaped guide rod and a baffle; one end of the L-shaped guide rod is fixed to the left front side of the base through a sliding groove, and the other end is fixedly connected with the baffle; the pushing mechanism is arranged on the ground on the right front side of the base and corresponds to the positioning baffle; comprising: a base, a pushing cylinder and a pushing head, the base is fixed on the ground on the right front side of the base, the pushing cylinder is fixed on the upper surface of the base, and the pushing head is fixed on the piston end of the pushing cylinder and opposite to the positioning baffle; the piston of the pushing cylinder pushes the pushing head to move forward, pushes the car side wall to move left, and pushes the car side wall between the positioning baffle and the pushing mechanism until the car side wall is positioned in the X direction; the Y-direction positioning mechanism comprises a positioning base and a lower cross beam pressing plate; the positioning base is two positioning bases, respectively arranged on the base below the front and rear door frames of the car side wall after the car side wall is positioned on the lifting frame; the lower cross beam pressing plate is arranged on the base between the two positioning bases and comprises a rotating mechanism and a rotating pressing plate; the rotating mechanism is fixed on the base, the rotating pressing plate is fixed on the end of the rotating mechanism, and a rectangular step is arranged on the rotating pressing plate; when the rotating pressing plate is rotated to the vertical position, the rectangular step on the rotating pressing plate is just clamped on the lower cross beam of the car side wall, so that the car side wall is positioned in the Y direction; the Z-direction positioning mechanism comprises a positioning column and a positioning support; the positioning column is arranged on the base opposite to the reference hole on the lower cross beam of the car side wall and comprises a cylinder and a piston; the piston part is also the positioning column, and the diameter of the positioning column matches the reference hole on the lower cross beam of the car side wall; the positioning support comprises a support plate, a supporting cylinder and a supporting claw; the support plate is fixed on the horizontal bar in the middle and upper part of the right support, the supporting cylinder is fixed on the support plate, and the supporting claw is fixed on the piston end of the supporting cylinder; the supporting position of the supporting claw is just in the middle and upper part of the B column of the car side wall, and the supporting distance is accurate when the car side wall is kept in the vertical state. The folding mechanism comprises a folding cylinder and a folding head, the folding cylinder is arranged in front of the buckle, the folding head comprises a folding bottom plate, a U-shaped support and a roller, the folding bottom plate is fixed to the front end of the piston of the folding cylinder, the U-shaped support is fixed to the middle of the bottom plate, an opening is arranged in the transverse middle of the U-shaped support, so that the two opposite edges of the U-shaped support form two parallel roller supports, the roller is installed in the roller support, and the gap between the two parallel rollers is opposite to the buckle.

2. The automatic pre-assembling device for welding of a car side wall according to claim 1, characterized in that, The folding mechanism is a double folding head folding mechanism, that is, two U-shaped supports and rollers are arranged side by side on the folding bottom plate, and a guide seat is arranged between the two U-shaped supports, the guide seat is higher than the roller, a guide groove is arranged in the longitudinal center of the guide seat, and a V-shaped opening is arranged at the front end of the guide groove, and the middle lines of the two rollers of the folding head on both sides of the guide seat are on the same straight line as the middle line of the guide groove.

3. The automatic pre-assembling device for welding of a car side wall according to claim 1, characterized in that, The folding mechanism is arranged at the position of the buckle after the car side wall is positioned to the welding setting position, the number of the folding mechanisms is the same as that of the buckles, and the folding mechanisms are arranged in front of each buckle, the folding mechanism is arranged transversely through the support in front of the combination part of the car trunk support and the car floor when the car side wall is in the welding setting position, and the gap between the two parallel rollers is opposite to the buckle, the double folding head folding mechanism is arranged through the base plate below the combination part of the car fender support and the car floor, and the gap between the two parallel rollers is opposite to the buckle, one folding mechanism is arranged through the telescopic mechanism on the support column above the combination part of the car side wall front door frame bottom and the car floor, and the gap between the two parallel rollers is opposite to the buckle.

4. The automatic pre-assembling device for welding of a car body side according to claim 3, characterized in that, The telescopic mechanism comprises a fixed frame, a guide rail, an extension cylinder fixing seat, an extension cylinder and a hinge mechanism, the fixed frame is fixedly connected with the support column, the guide rail comprises a sliding rail and a sliding seat, the sliding rail is fixedly connected to the bottom of the fixed frame, the sliding seat is fixedly connected with the folding mechanism, and the folding head is arranged downward, the extension cylinder fixing seat is fixedly connected to the outer side of the fixed frame, the extension cylinder is fixedly connected to the extension cylinder fixing seat, one end of the hinge mechanism is connected with the end of the piston of the telescopic cylinder, and the other end is connected with the rear side of the folding mechanism.

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