An automatic welding device for a seat pipe rack

Abstract

The present invention relates to the field of furniture production, and particularly to an automatic welding device for seat pipe racks. It includes a vertical pipe feeding mechanism, a horizontal pipe feeding mechanism, and a rotary spot welding mechanism; the rotary spot welding mechanism includes vertical pipe racks vertically arranged on both sides under normal conditions and a horizontal pipe groove between the two vertical pipe racks. The contact end of the horizontal pipe mounted on the horizontal pipe groove and the vertical pipe on the vertical pipe rack is the spot welding point. Spot welding heads are arranged on the inner sides of the two vertical pipe racks facing each other. The rotating shaft of the rotating motor and the horizontal pipe on the horizontal pipe groove are on the same horizontal straight line. By rotating the vertical pipe racks, the outer circles at both ends of the horizontal pipe are spot welded and fixed to the vertical pipes; a vertical pipe feeding mechanism is arranged above the two vertical pipe racks, a horizontal pipe feeding mechanism is arranged on one side of the horizontal pipe groove, and a seat rack output guiding inclined plate is arranged on the side of the horizontal pipe groove away from the horizontal pipe feeding mechanism. The feeding and welding of the horizontal pipes and vertical pipes of this device adopt a fully automatic integrated design, greatly improving the welding efficiency.

Description

Technical Field

[0001] The present invention relates to the field of furniture production, and particularly to an automatic welding device for a seat pipe rack. Background Art

[0002] A seat is a sitting tool with a backrest and sometimes armrests. In ancient times, people sat on the ground and there were no chairs originally. "Yi" was originally the name of a tree. The main brackets of many seats are made by welding metal pipes. This structure is firm and inexpensive, and it will also be very durable after being painted with anti-rust paint. At present, most welding is carried out manually or semi-automatically. Workers manually place several pipes at different positions as required for fixation, and then use a welding machine for welding. These placement processes are extremely time-consuming, resulting in low production efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, meet the actual needs, and provide an automatic welding device for a seat pipe rack.

[0004] To achieve the purpose of the present invention, the technical solution adopted by the present invention is: an automatic welding device for a seat pipe rack, including a vertical pipe feeding mechanism, a horizontal pipe feeding mechanism, and a rotary spot welding mechanism; the rotary spot welding mechanism includes vertical pipe racks 2 vertically arranged on both sides under normal conditions and a horizontal pipe groove 1 between the two vertical pipe racks. The contact end of the horizontal pipe 3 mounted on the horizontal pipe groove with the vertical pipe 4 on the vertical pipe rack is the spot welding point. Spot welding heads 5 are arranged on the inner sides of the two vertical pipe racks facing each other, and the spot welding heads face the spot welding points. Rotating motors 6 are arranged on the outer sides of the two vertical pipe racks facing each other. The rotating shaft of the rotating motor is on the same horizontal line as the horizontal pipe on the horizontal pipe groove. By rotating the vertical pipe racks, the outer circles at both ends of the horizontal pipe are spot welded and fixed to the vertical pipes; a vertical pipe feeding mechanism is arranged above the two vertical pipe racks to supply pipes to the vertical pipe racks; a horizontal pipe feeding mechanism is arranged on one side of the horizontal pipe groove, and a seat rack output guiding inclined plate 7 is arranged on the side of the horizontal pipe groove away from the horizontal pipe feeding mechanism.

[0005] Supports 8 are arranged on the outer sides of the two vertical pipe racks facing each other. A movable plate 9 is arranged on the support. The rotating motor is arranged on the movable plate; a first air cylinder 10 is arranged on the side of the rotating motor away from the vertical pipe rack. The air pressure rod of the first air cylinder is connected to the movable plate to drive the vertical pipe rack to move back and forth.

[0006] The vertical pipe feeding mechanism includes a vertical pipe box and a second air cylinder 11; a vertical pipe box support plate 12 is provided on the bracket above the first air cylinder, a vertical pipe box positioning jack is provided on the vertical pipe box support plate, a pin 13 is provided at the corresponding position of the vertical pipe box, the two vertical pipe boxes are respectively arranged on the opposite outer sides of the rotation paths of the vertical pipe racks on both sides, an outlet pipe opening 14 is provided at the bottom of the vertical pipe box close to the vertical pipe rack, a second air cylinder 11 is provided at the position corresponding to the outlet pipe opening above the vertical pipe box, and a pushing block 15 is provided at the end of the air pressure rod below the second air cylinder; the vertical pipe rack moves to the outlet pipe opening to pick up the pipe under the action of the first air cylinder, and then moves to the spot welding point for spot welding.

[0007] A pushing plate 16 is vertically arranged in the vertical pipe box along its pipe feeding direction, limiting convex blocks 17 are arranged on both sides of the pushing plate, and convex block chutes are arranged at the corresponding positions on the inner side of the vertical pipe box; a first spring 18 is arranged between the pushing plate and the side wall of the vertical pipe box, and it is pushed towards the outlet pipe opening under the action of the first spring; wedge-shaped stop blocks 19 are arranged on both sides of the outlet pipe opening, spring grooves are arranged on the opposite outer sides of the two wedge-shaped stop blocks, a second spring 20 is arranged between the wedge-shaped stop block and the inner side wall of the spring groove, and both ends of the second spring are fixedly connected to the wedge-shaped stop block and the inner wall of the spring groove respectively. Under normal conditions, the two wedge-shaped stop blocks extend into the outlet pipe opening under the action of the second spring; under the push of the second air cylinder, it contracts to send out the vertical pipe.

[0008] The groove body below the horizontal pipe groove 1 is an arc-shaped groove body that fits the horizontal pipe, and the groove wall near the horizontal pipe feeding mechanism is lower than the height of the groove wall near the output guiding inclined plate of the seat frame; the output guiding inclined plate of the seat frame is connected to the highest point of the horizontal pipe groove; an opening 21 is provided below the horizontal pipe groove, a third air cylinder 22 is vertically arranged at the opening, and a seat frame pushing plate 23 is arranged on the air pressure rod of the third air cylinder. The welded seat frame is pushed to the output guiding inclined plate of the seat frame to be sent out through the seat frame pushing plate.

[0009] The vertical pipe rack is a vertical groove body structure with an opening facing the opposite side. The upper part of the groove body structure is through, and a limiting slot 24 with an upward opening is provided at the bottom. When the vertical pipe rack receives the vertical pipe and moves towards the opposite side, there will be no shaking and falling. The inner wall height of the limiting slot is less than the height from the top end to the bottom end of the horizontal pipe groove on one side of the output guiding inclined plate of the seat frame; the seat frame pushing plate is in an "L" shape, the bent end of its lower end faces the output guiding inclined plate of the seat frame, and its lower side plate body is inclined downward at the same inclination angle as the output guiding inclined plate of the seat frame; the seat frame pushing plate is lifted under the action of the third air cylinder. When the plate body on its lower side is in a straight line with the plate body of the seat frame pushing plate, the seat frame moves out of the limiting slot and at the same time slides onto the output guiding inclined plate of the seat frame under the action of gravity.

[0010] The horizontal pipe feeding mechanism includes a conveyor belt 25, a pipe feeding gripper 26, a fourth air cylinder 27 and a fifth air cylinder 28; the conveyor belt is driven by a stepping motor, a cross plate 29 is arranged between the conveyor belt and the horizontal pipe groove, a fourth air cylinder is arranged above the conveyor belt, the pushing direction of the air pressure rod of the fourth air cylinder is consistent with the conveying direction of the conveyor belt, the end of the air pressure rod of the fourth air cylinder is connected with a fifth air cylinder, and the air pressure rod below the fifth air cylinder is connected with the pipe feeding gripper. The horizontal pipe is picked up downward by the pipe feeding gripper and then pushed into the horizontal pipe groove by the fourth air cylinder through the cross plate.

[0011] The beneficial effects of the present invention are as follows:

[0012] The horizontal pipe feeding, vertical pipe feeding and welding of this device adopt a fully automatic integrated design, which greatly improves the welding efficiency. Description of the Drawings

[0013] The following further describes the present invention in conjunction with the drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the back of the present invention;

[0016] Figure 3 It is a cross-sectional view of the vertical pipe box;

[0017] Figure 4 It is an enlarged view of the limit slot;

[0018] Figure 5 It is a cross-sectional view of the outlet pipe;

[0019] Figure 6 , Figure 7 It is a schematic diagram of two states of the seat frame push plate. Detailed Embodiments

[0020] The following further describes the present invention in conjunction with the drawings and embodiments:

[0021] See Figures 1-7 .

[0022] The present invention discloses an automatic welding device for a seat pipe rack, which includes a vertical pipe feeding mechanism, a horizontal pipe feeding mechanism, and a rotary spot welding mechanism; the rotary spot welding mechanism includes vertical pipe racks 2 vertically arranged on both sides under normal conditions and a horizontal pipe groove 1 between the two vertical pipe racks. The contact end of the horizontal pipe 3 mounted on the horizontal pipe groove with the vertical pipe 4 on the vertical pipe rack is the spot welding point. Spot welding heads 5 are arranged on the inner sides of the two vertical pipe racks facing each other, and the spot welding heads face the spot welding points. Rotating motors 6 are arranged on the outer sides of the two vertical pipe racks facing each other. The rotating shaft of the rotating motor is on the same horizontal line as the horizontal pipe on the horizontal pipe groove. By rotating the vertical pipe racks, the outer circles of both ends of the horizontal pipe are spot welded and fixed to the vertical pipes; a vertical pipe feeding mechanism is arranged above the two vertical pipe racks to supply pipes to the vertical pipe racks; a horizontal pipe feeding mechanism is arranged on one side of the horizontal pipe groove, and a seat rack output guiding inclined plate 7 is arranged on the side of the horizontal pipe groove away from the horizontal pipe feeding mechanism.

[0023] Supports 8 are arranged on the outer sides of the two vertical pipe racks facing each other, and a movable plate 9 is arranged on the supports; the rotating motors are arranged on the movable plate; a first air cylinder 10 is arranged on the side of the rotating motor away from the vertical pipe rack, and the air pressure rod of the first air cylinder is connected to the movable plate to drive the vertical pipe rack to move back and forth.

[0024] The vertical pipe feeding mechanism includes a vertical pipe box and a second air cylinder 11; a vertical pipe box support plate 12 is arranged on the support above the first air cylinder. A vertical pipe box positioning jack is arranged on the vertical pipe box support plate, and a plug 13 is arranged at the corresponding position of the vertical pipe box. The two vertical pipe boxes are respectively arranged on the outer sides of the rotation paths of the vertical pipe racks on both sides facing each other. An outlet pipe opening 14 is arranged at the bottom of the vertical pipe box close to the vertical pipe rack. A second air cylinder 11 is arranged at the position corresponding to the outlet pipe opening above the vertical pipe box. A pushing block 15 is arranged at the end of the air pressure rod below the second air cylinder; the vertical pipe rack moves to the outlet pipe opening to pick up the pipe under the action of the first air cylinder and then moves to the spot welding point for spot welding. The vertical pipe box can be replaced. In order to further improve the production efficiency, the vertical pipe box designed by us adopts a plug-in fixing method. Two jacks are arranged at the plug-in end. After the pipe supply is completed, the vertical pipe box can be quickly replaced, and the new vertical pipe can be replenished into the vacant vertical pipe box.

[0025] The vertical pipe box is vertically provided with a pushing plate 16 along its pipe feeding direction. Limiting bumps 17 are arranged on both sides of the pushing plate, and corresponding bump chutes are arranged at the corresponding positions on the inner side of the vertical pipe box. A first spring 18 is arranged between the pushing plate and the side wall of the vertical pipe box, and it is pushed towards the pipe outlet under the action of the first spring. Wedge-shaped stoppers 19 are arranged on both sides at the pipe outlet. Spring grooves are arranged on the outer sides of the two wedge-shaped stoppers facing each other. A second spring 20 is arranged between the wedge-shaped stopper and the inner side wall of the spring groove. Both ends of the second spring are fixedly connected to the wedge-shaped stopper and the inner wall of the spring groove respectively. Under the action of the second spring in the normal state, the two wedge-shaped stoppers extend into the pipe outlet. Under the push of the second air cylinder, it contracts to send out the vertical pipe.

[0026] The groove body below the horizontal pipe groove 1 is an arc-shaped groove body that fits the horizontal pipe. The groove wall near the horizontal pipe feeding mechanism is lower than the height of the groove wall near the output guiding inclined plate of the seat frame. The output guiding inclined plate of the seat frame is connected to the highest point of the horizontal pipe groove. An opening 21 is arranged below the horizontal pipe groove. A third air cylinder 22 is vertically arranged at the opening. A seat frame pushing plate 23 is arranged on the air pressure rod of the third air cylinder. The welded seat frame is pushed to the output guiding inclined plate of the seat frame to be sent out through the seat frame pushing plate.

[0027] The vertical pipe frame is a vertical groove body structure with an opening facing the opposite side. The upper part of the groove body structure is through, and a limiting slot 24 with an upward opening is arranged at the bottom. When the vertical pipe frame receives the vertical pipe and then moves towards the opposite side, there will be no situation of shaking and falling. The inner wall height of the limiting slot is less than the height from the top end to the bottom end of the horizontal pipe groove on one side of the output guiding inclined plate of the seat frame. The seat frame pushing plate is in an "L" shape. The bent end of its lower end faces the output guiding inclined plate of the seat frame, and its lower side plate body inclines downward at the same inclination angle as the output guiding inclined plate of the seat frame. The seat frame pushing plate is lifted under the action of the third air cylinder. When the plate body on its lower side is in a straight line with the plate body of the seat frame pushing plate, the seat frame moves out of the limiting slot and at the same time slides onto the output guiding inclined plate of the seat frame under the action of gravity. The purpose of designing that the inner wall height of the limiting slot is less than the height from the top end to the bottom end of the horizontal pipe groove on one side of the output guiding inclined plate of the seat frame is that when the seat frame pushing plate lifts the seat pipe frame, when it is lifted to the height of the output guiding inclined plate of the seat frame, it will not be blocked by the limiting slot. When the pushing plate lifts the seat pipe frame, the two vertical pipe frames on both sides move towards the opposite outer sides under the action of the first air cylinder 10 and move to the pipe outlet 14 for pipe loading.

[0028] The horizontal pipe feeding mechanism includes a conveyor belt 25, a pipe feeding gripper 26, a fourth air cylinder 27 and a fifth air cylinder 28; the conveyor belt is driven by a stepping motor, a cross plate 29 is arranged between the conveyor belt and the horizontal pipe groove, a fourth air cylinder is arranged above the conveyor belt, the pushing direction of the air pressure rod of the fourth air cylinder is consistent with the conveying direction of the conveyor belt, the end of the air pressure rod of the fourth air cylinder is connected with a fifth air cylinder, the air pressure rod below the fifth air cylinder is connected with the pipe feeding gripper, the horizontal pipe is picked up downward by the pipe feeding gripper, and then it is pushed by the fourth air cylinder through the cross plate into the horizontal pipe groove.

[0029] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or any direct or indirect application in related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. An automatic welding device for a seat pipe rack, characterized in that: It includes a vertical pipe feeding mechanism, a horizontal pipe feeding mechanism, and a rotary spot welding mechanism; the rotary spot welding mechanism includes vertical pipe racks (2) vertically arranged on both sides under normal conditions and a horizontal pipe groove (1) between the two vertical pipe racks. The contact end of the horizontal pipe (3) mounted on the horizontal pipe groove and the vertical pipe (4) on the vertical pipe rack is the spot welding point. Spot welding heads (5) are arranged on the inner sides of the two vertical pipe racks facing each other, and the spot welding heads face the spot welding point. Rotating motors (6) are arranged on the outer sides of the two vertical pipe racks facing each other. The rotating shaft of the rotating motor is on the same horizontal line as the horizontal pipe on the horizontal pipe groove. By rotating the vertical pipe racks, the outer circles at both ends of the horizontal pipe are spot welded and fixed to the vertical pipes; a vertical pipe feeding mechanism is arranged above the two vertical pipe racks to supply pipes to the vertical pipe racks; a horizontal pipe feeding mechanism is arranged on one side of the horizontal pipe groove, and a seat frame output guiding inclined plate (7) is arranged on the side of the horizontal pipe groove away from the horizontal pipe feeding mechanism; the groove body below the horizontal pipe groove (1) is an arc-shaped groove body that fits the horizontal pipe. The groove wall near the horizontal pipe feeding mechanism is lower than the groove wall height near the seat frame output guiding inclined plate. The seat frame output guiding inclined plate is connected to the highest point of the horizontal pipe groove; an opening (21) is arranged below the horizontal pipe groove, and a third air cylinder (22) is vertically arranged at the opening. A seat frame pushing plate (23) is arranged on the air pressure rod of the third air cylinder. The welded seat frame is pushed by the seat frame pushing plate to the seat frame output guiding inclined plate and sent out; the vertical pipe rack is a vertical groove body structure with an opening facing the side facing each other. The upper part of the groove body structure is through, and a limiting slot (24) with an upward opening is arranged at the bottom. When the vertical pipe rack receives the vertical pipe and moves towards the side facing each other, there will be no shaking and falling. The inner wall height of the limiting slot is less than the height from the top end to the bottom end of the horizontal pipe groove on one side of the seat frame output guiding inclined plate; the seat frame pushing plate is in an "L" shape, and its lower bent end faces the seat frame output guiding inclined plate. Its lower side plate body is inclined downward at the same inclination angle as the seat frame output guiding inclined plate; the seat frame pushing plate is lifted under the action of the third air cylinder. When the plate body on its lower side is in a straight line with the plate body of the seat frame pushing plate, the seat frame moves out of the limiting slot and slides onto the seat frame output guiding inclined plate under the action of gravity.

2. The automatic welding device for a seat pipe bracket according to claim 1, characterized in that: Brackets (8) are arranged on the outer sides of the two vertical pipe racks facing each other, and a movable plate (9) is arranged on the brackets; the rotating motor is arranged on the movable plate; a first air cylinder (10) is arranged on the side of the rotating motor away from the vertical pipe rack, and the air pressure rod of the first air cylinder is connected to the movable plate to drive the vertical pipe rack to move back and forth.

3. The automatic welding device for a seat pipe bracket according to claim 2, characterized in that: The vertical pipe feeding mechanism includes a vertical pipe box and a second air cylinder (11); a vertical pipe box support plate (12) is arranged on the bracket above the first air cylinder, a positioning jack for the vertical pipe box is arranged on the vertical pipe box support plate, a pin (13) is arranged at the corresponding position of the vertical pipe box, the two vertical pipe boxes are respectively arranged on the opposite outer sides of the rotation paths of the vertical pipe racks on both sides, an outlet pipe opening (14) is arranged at the bottom of the vertical pipe box close to the vertical pipe rack, a second air cylinder (11) is arranged at the position corresponding to the outlet pipe opening above the vertical pipe box, and a pushing block (15) is arranged at the end of the air pressure rod below the second air cylinder; the vertical pipe rack moves to the outlet pipe opening to pick up the pipe under the action of the first air cylinder, and then moves to the spot welding point for spot welding.

4. The automatic welding device for a seat pipe bracket according to claim 3, wherein: A pushing plate (16) is vertically arranged along the pipe feeding direction of the vertical pipe box, limiting convex blocks (17) are arranged on both sides of the pushing plate, and convex block sliding grooves are arranged at the corresponding positions on the inner side of the vertical pipe box; a first spring (18) is arranged between the pushing plate and the side wall of the vertical pipe box, and it is pushed towards the outlet pipe opening under the action of the first spring; wedge-shaped stoppers (19) are arranged on both sides of the outlet pipe opening, spring grooves are arranged on the opposite outer sides of the two wedge-shaped stoppers, a second spring (20) is arranged between the wedge-shaped stopper and the inner wall of the spring groove, and both ends of the second spring are fixedly connected to the wedge-shaped stopper and the inner wall of the spring groove respectively. Under normal conditions, the two wedge-shaped stoppers extend into the outlet pipe opening under the action of the second spring; it contracts under the push of the second air cylinder to send out the vertical pipe.

5. An automatic welding device for a seat tube frame according to claim 1, characterized in that: The horizontal pipe feeding mechanism includes a conveyor belt (25), a pipe feeding gripper (26), a fourth air cylinder (27) and a fifth air cylinder (28); the conveyor belt is driven by a stepping motor, a cross plate (29) is arranged between the conveyor belt and the horizontal pipe groove, a fourth air cylinder is arranged above the conveyor belt, the pushing direction of the air pressure rod of the fourth air cylinder is consistent with the conveying direction of the conveyor belt, the end of the air pressure rod of the fourth air cylinder is connected to a fifth air cylinder, and the air pressure rod below the fifth air cylinder is connected to the pipe feeding gripper. The horizontal pipe is picked up downward by the pipe feeding gripper, and then pushed by the fourth air cylinder through the cross plate into the horizontal pipe groove.

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