Full-automatic conjoined welding machine

Abstract

The utility model discloses a full-automatic conjoined welding machine which is used for conjoined welding of a supporting rod and a foot rest ring of a swivel chair, the welding machine comprises a machine frame, a rotating disc unit, a supporting rod clamping unit, a foot rest ring clamping unit, a gun feeding unit and a controller, the rotating disc unit comprises a rotating disc and a rotating disc driving mechanism, the support rod clamping unit comprises a support rod clamping mechanism and a turnover mechanism, the footrest ring clamping unit comprises a footrest ring clamping mechanism and a calibration mechanism, and the gun feeding unit comprises a welding gun and a welding gun driving mechanism. The supporting rod clamping mechanism and the footrest ring clamping mechanism are used for carrying out overall overturning operation on the supporting rod and the footrest ring, girth welding can be carried out on two pipe feet of the footrest ring in sequence, the positioning precision and the welding efficiency of a connected welding area are improved, the welding process is automatic, accurate and efficient, and the welding quality is good.

Description

Technical Field

[0001] The utility model relates to a welding device, in particular to a full-automatic one-piece welding machine used for welding a swivel chair support rod and a footrest ring. Background Art

[0002] Metal bar chairs are simple in structure, low in cost and fashionable, and are used more and more widely. Since the seat of the bar chair is high from the ground and can rotate, a footrest is designed at the bottom of the bar chair. In order to reduce costs and reduce weight, the footrest is generally made of thin steel pipe. Since the tube wall of the footrest is thin and requires circular welding, manual welding is generally used, which makes the positioning and welding of the footrest cumbersome and inefficient, and the welding quality is not easy to control. At the same time, the technical requirements for welders are also high. Utility Model Content

[0003] The utility model mainly solves the above-mentioned technical problems and provides a full-automatic one-piece welding machine for one-piece welding of a bar chair support rod and a footrest ring, which has good welding quality and high welding efficiency.

[0004] In order to solve the above-mentioned technical problems, the utility model mainly adopts the following technical solutions:

[0005] The utility model discloses a fully automatic one-piece welding machine, which is used for the one-piece welding of a support rod and a footrest ring of a swivel chair. The support rod is tubular and has two through holes. The footrest ring is an arc-shaped structure, and the ends of the tube pins on both sides correspond to and contact the two through holes. The welding machine comprises:

[0006] A frame, on which at least one set of one-piece welding devices is installed, and the one-piece welding device includes a turntable unit, a gun feeding unit, a support rod clamping unit, a footrest ring clamping unit and a controller;

[0007] The turntable unit comprises a turntable and a turntable driving mechanism, wherein a base is fixedly arranged on the turntable, the support rod clamping unit and the footrest ring clamping unit are fixedly arranged on the base, and the turntable driving mechanism comprises a turntable motor, which is electrically connected to the controller and drives the turntable to rotate;

[0008] A support rod clamping unit, used for clamping and adjusting the position and angle of the support rod, comprises a support rod clamping mechanism and a support rod flipping mechanism fixed on the turntable;

[0009] A footrest ring clamping unit, used for clamping and positioning the position and angle of the footrest ring, comprising a footrest ring clamping mechanism and a footrest ring calibration mechanism;

[0010] A gun feeding unit, used to push the welding gun deep into the welding area, comprises a welding gun and a welding gun driving mechanism, wherein the welding gun is fixed on the frame;

[0011] A controller, used to control the operation of the above-mentioned units;

[0012] The welding device of the one-piece welding machine performs 360° circumferential seam welding on the connection between the support rod and the footrest ring tube pin through the rotation of the turntable, and flips the support rod and the footrest ring through the support rod clamping unit and the footrest ring clamping unit, and can perform one-piece welding on the two tube pins of the footrest ring in turn, thereby improving the positioning accuracy and welding efficiency of the one-piece welding area of ​​the footrest ring. The welding process is automatic, accurate and efficient, and the welding quality is good. Multiple welding devices are arranged on the frame, which occupies a small area and can double the welding efficiency.

[0013] The top surface of the support plate is arc-shaped and two rollers are provided on both sides of the arc. The above-mentioned rollers support the support rod. The above-mentioned roller assembly includes a pressure wheel frame, a pressure wheel and a handle. The pressure wheel frame is fixed on the base. The pressure wheel is fixed on the top of the pressure wheel frame and is located above the support rod. The handle is connected with the pressure wheel and drives the pressure wheel to press down and tighten the support rod. The support rod flipping mechanism includes a bearing seat and a flip motor. The above-mentioned bearing seat is fixed on the base and supports the output shaft of the flip motor. The flip motor is electrically connected to the controller. A pipe clamp is fixed on the shaft end of the output shaft of the flip motor. The flip motor is connected to the pipe end of the support rod through the pipe clamp and drives the support rod to rotate. The support rod is horizontally placed on the roller on the top of the support plate and rotates with the output shaft of the flip motor, so that the welding gun can weld the two pipe pins of the footrest ring in turn.

[0014] Preferably, the footrest ring clamping mechanism includes a clamping bracket, two groups of clamps placed on the clamping bracket and a clamp cylinder, the clamping bracket is fixed on the pipe clamp and rotates with the pipe clamp, the two groups of clamps are fixed on the clamping bracket, the two groups of clamps are located in the same vertical plane and correspond to the two tube pins of the footrest ring respectively, each group of clamps includes a matching fixed clamp plate and a movable clamp plate, the inner surface of the fixed clamp plate is provided with a groove that matches the tube pin of the footrest ring, the movable clamp plate is fixedly connected to the piston rod of the above-mentioned clamp cylinder and expands and contracts with the piston rod, and the movable clamp plate The inner surface of the clamp plate is provided with a groove that matches the footrest ring tube pin and is combined with the groove on the inner surface of the fixed clamp plate to form a clamping hole for accommodating the footrest ring tube pin. The clamp clamps the footrest ring tube pin through the cooperation of the movable clamp plate and the fixed clamp plate. The two groups of clamp components respectively clamp and position the two tube pins of the footrest ring, which can keep the plane of the footrest ring vertically perpendicular to the axis of the support rod to ensure the positioning angle of the footrest ring and the support rod. The movable clamp plate is driven to flip through the clamp cylinder, and it is convenient to clamp or loosen the footrest ring tube pin in cooperation with the fixed clamp plate. The control process is accurate and convenient.

[0015] Preferably, the footrest ring calibration mechanism includes a proximity switch and a positioning rod, the proximity switch is fixed on the above-mentioned base, the proximity switch is electrically connected to the above-mentioned controller, the positioning rod is fixed on the above-mentioned footrest ring clamping mechanism and corresponds to the proximity switch, when the footrest ring rotates to make the positioning rod close to the proximity switch, the proximity switch is triggered, at this time, the signal of the proximity switch can be transmitted to the controller as the initial position signal of the support rod rotation, which can calibrate the initial position deviation of the footrest ring that may be caused by multiple rotations.

[0016] Preferably, the welding gun driving mechanism includes a welding gun bracket and a guide rail, a slider and a welding gun cylinder placed on the welding gun bracket. The welding gun bracket is fixed on the above-mentioned frame, and the welding gun cylinder and the guide rail are both fixed on the welding gun bracket. The guide rail is arranged obliquely and its front end is inclined downward. The end of the welding gun cylinder piston rod is fixedly connected to the tail of the above-mentioned welding gun, and the slider is embedded in the guide rail and slides along the guide rail. The slider supports the tail of the welding gun and slides with the welding gun. The welding gun head corresponds to the welding area where the end of the footrest ring pin is connected to the outer surface of the support rod. The welding gun cylinder can push the welding gun forward to the welding area for welding, and the control is convenient and accurate.

[0017] Preferably, the turntable motor is a servo motor, which can accurately control the horizontal rotation angle of the turntable and the support rod, so that the welding gun can perform 360° circular welding on the connection between the support rod and the footrest ring, ensuring the welding quality of the annular seam.

[0018] Preferably, the flipping motor is a servo motor, which can accurately control the flipping angle of the support rod and the footrest ring, facilitate the welding of the two tube pins of the footrest ring, and improve the positioning accuracy and welding efficiency of the footrest ring tube pins.

[0019] The beneficial effects of the utility model are as follows: the one-piece welding device of the welding machine performs 360° circumferential seam welding on the connection between the support rod and the footrest ring tube pin through the rotation of the turntable, and flips the support rod and the footrest ring through the support rod clamping unit and the footrest ring clamping unit, and can perform one-piece welding on the two tube pins of the footrest ring in turn, thereby improving the positioning accuracy and welding efficiency of the one-piece welding area of ​​the footrest ring, and the welding process is automated, accurate, efficient, and has good welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the one-piece welding device.

[0022] Figure 3 yes Figure 2 Schematic diagram of the support rod clamping mechanism.

[0023] Figure 4 yes Figure 2 Schematic diagram of the support rod flipping mechanism.

[0024] Figure 5 yes Figure 2 Schematic diagram of the footrest ring clamping mechanism and calibration mechanism.

[0025] Figure 6 yes Figure 2 Schematic diagram of the gun feeding unit structure.

[0026] In the figure, 1. support rod, 2. footrest ring, 10. frame, 20. turntable, 201. base, 30. support rod clamping mechanism, 301. support plate, 302. roller, 303. pressure wheel frame, 304. pressure wheel, 305. handle, 40. support rod flipping mechanism, 401. bearing seat, 402. flip motor, 403. pipe clamp, 50. footrest ring clamping mechanism, 501. clamping bracket, 502. fixture cylinder, 503. fixed splint, 504. movable splint, 60. footrest ring calibration mechanism, 601. proximity switch, 602. positioning rod, 70. welding gun, 80. welding gun driving mechanism, 801. welding gun bracket, 802. guide rail, 803. slider, 804. welding gun cylinder, 90. controller. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0028] Embodiment: The fully automatic one-piece welding machine of this embodiment is used for one-piece welding of the support rod 1 and the footrest ring 2 of a swivel chair. Figure 1 As shown, the support rod is tubular, and two through holes are designed on the support rod. The footrest ring is an arc-shaped structure, and the ends of the tube pins on both sides correspond to and contact the above two through holes. The fully automatic one-piece welding machine includes:

[0029] The frame 10 is provided with two sets of conjoined welding devices, such as Figure 2 As shown, the above-mentioned one-piece welding device includes a turntable unit, a gun feeding unit, a support rod clamping unit, a footrest ring clamping unit and a controller;

[0030] The turntable unit is used for the integral rotation welding of the support rod and the footrest rod, and comprises a turntable 20 and a turntable driving mechanism. A base 201 is fixedly provided on the turntable. The support rod clamping unit and the footrest ring clamping unit are both placed on the base and rotate with the turntable. The turntable driving mechanism comprises a turntable motor, which is a servo motor. The turntable motor is electrically connected to the controller and drives the turntable to rotate. The servo motor can improve the rotation accuracy of the turntable.

[0031] A support rod clamping unit, used for clamping and adjusting the position and angle of the support rod, comprises a support rod clamping mechanism 30 and a support rod flipping mechanism 40 fixedly mounted on the turntable;

[0032] A footrest ring clamping unit, used for clamping and positioning the position and angle of the footrest ring, comprising a footrest ring clamping mechanism 50 and a footrest ring calibration mechanism 60;

[0033] The gun feeding unit includes a welding gun 70 and a welding gun driving mechanism 80, which is used to push the welding gun to the contact area between the footrest ring and the support rod for welding;

[0034] A controller, used to control the operation of the above-mentioned units;

[0035] like Figure 3 As shown, the support rod clamping mechanism includes two support plates 301 and a clamping assembly. The two support plates are of equal height and are installed on the base at intervals. The top surface of the support plate is an arc-shaped structure and matches the support rod. Two rollers 302 are respectively installed on both sides of the arc of the support rod. The rollers can support the support rod. The clamping assembly includes a pressure wheel frame 303, a pressure wheel 304 and a handle 305. The pressure wheel frame is installed on the base and is located in the middle of the two support plates. The pressure wheel is installed on the top of the pressure wheel frame and is located above the support rod. The handle is installed on the pressure wheel frame and drives the pressure wheel to press down against the fixed support rod.

[0036] like Figure 4 As shown, the above-mentioned support rod flipping mechanism includes two bearing seats 401 and a flip motor 402. The above-mentioned two bearing seats are installed on the base. The bearing seats are used to fix and support the output shaft of the flip motor. The above-mentioned flip motor is a servo motor. The flip motor is electrically connected to the controller. The output shaft of the flip motor extends to one side of the support rod through the bearing seat. The far end of the output shaft of the flip motor is installed with a pipe clamp 403. One end of the support rod is fixedly connected to the output shaft of the flip motor through the pipe clamp and rotates with the output shaft.

[0037] like Figure 5 As shown, the footrest ring clamping mechanism includes a clamping bracket 501, two groups of clamps placed on the clamping bracket and a clamp cylinder 502. The clamping bracket is installed on the pipe clamp and rotates with the pipe clamp. The two groups of clamps are respectively installed on the clamping bracket, and the two groups of clamps are located in the same vertical plane and correspond to the two tube pins of the footrest ring respectively. Each group of clamps includes a matching fixed clamp plate 503 and a movable clamp plate 504. The inner surface of the fixed clamp plate is designed with a groove that matches the tube pin of the footrest ring. The movable clamp plate is fixedly connected to the above-mentioned cylinder piston rod and expands and contracts with the piston rod. The inner surface of the movable clamp plate is designed with a groove that matches the tube pin of the footrest ring and is enclosed with the groove on the inner surface of the fixed clamp plate to form a clamping hole for accommodating the tube pin of the footrest ring. The clamp can fix and position the tube pin of the footrest ring through the above-mentioned clamping hole, and then position and fix the welding position and angle of the tube pin of the footrest ring on the support rod.

[0038] The above-mentioned footrest ring calibration mechanism includes a proximity switch 601 and a positioning rod 602. The proximity switch is installed on the base, and the positioning rod is installed on the clamping bracket and corresponds to the proximity switch. The proximity switch is electrically connected to the above-mentioned controller. The positioning rod can rotate with the footrest ring clamping mechanism and can accurately detect the initial position and angle of the footrest ring, which can eliminate the initial position deviation that may be caused by multiple flips and perform calibration, thereby improving the accuracy of the initial position and angle;

[0039] like Figure 6 As shown, the gun feeding unit includes a welding gun 70, a welding gun bracket 801, and a guide rail 802, a slider 803, and a welding gun cylinder 804 placed on the welding gun bracket. The welding gun bracket is installed on the frame, and the welding gun cylinder and the guide rail are both installed on the welding gun bracket. The guide rail is arranged obliquely and its front end is tilted downward. The end of the welding gun cylinder piston rod is fixedly connected to the tail of the welding gun and pushes the welding gun forward. The slider is embedded in the guide rail and slides along the guide rail. The slider can support the tail of the welding gun and slide with the welding gun. The welding gun head that has moved forward to the right position is aligned with the welding area between the end of the footrest ring pin and the outer surface of the support rod. The welding gun cylinder pushes the welding gun to the welding area for welding, and the control is convenient and accurate.

[0040] When in use, place the support rod horizontally on the support plate on the base of the turntable surface and insert the tube end of the support rod into the tube clamp on the output shaft of the flip motor, rotate the support rod so that one of the through holes is at the top, tighten the bolts to fix the support rod and the tube clamp, and the support rod can rotate with the output shaft of the flip motor. At this time, the roller on the top of the support plate can support the support rod, pull the handle to make the pressure wheel press down and squeeze the support rod, and the support rod can only rotate but cannot move up and down or left and right through the pressure wheel and the roller, so as to ensure the stability of the support rod during welding. Then, place the footrest ring on the support rod and embed it into the groove of the fixed clamp plate, and align the two tube pins of the footrest ring with the two through holes of the support rod respectively. Open the clamp cylinder to extend the piston rod of the clamp cylinder and push the movable The movable clamping plate closes toward the fixed clamping plate, and the movable clamping plate cooperates with the fixed clamping plate to clamp and position the footrest ring. At this time, one of the footrest ring pins is located at the through hole on the upper outer surface of the support rod and is perpendicular to the turntable plane. The welding switch on the controller is turned on, the welding gun cylinder is actuated, the welding gun cylinder piston rod extends and pushes the welding gun forward, so that the welding gun head is aligned with the welding area between the footrest ring pin and the support rod surface. The welding gun is ignited and started to weld the above-mentioned welding area. At the same time, the turntable motor starts and drives the turntable to rotate, so that the welding gun can perform 360° circumferential seam welding on the welding area. After the welding of the first footrest ring pin is completed, the welding gun cylinder is closed, the welding gun cylinder piston rod retracts and drives the welding gun to reset, the welding gun retreats and moves away from the welding area, and the turntable motor reverses. Rotate and reset. Next, start the flip motor. The flip motor rotates according to the angle between the two footrest ring pins, so that the second pin rotates to the top together with the support rod and is perpendicular to the turntable plane. When the second pin is rotated into place, the welding gun cylinder starts again, and the welding gun moves forward again to the welding area between the second footrest ring pin and the surface of the support rod to ignite and perform welding operations. At the same time, the turntable motor starts again and drives the turntable to rotate, so that the welding gun can perform 360° circumferential seam welding on the welding area of ​​the second pin. When the circumferential seam welding of the second pin is completed, the welding gun cylinder is closed, the welding gun cylinder piston rod retracts and drives the welding gun to reset, and the welding gun retreats and moves away from the welding area to prepare for the next operation. At this time, the turntable motor rotates in the opposite direction and resets again. The flipping motor rotates in the opposite direction and resets, so that the first tube pin returns to the top and is perpendicular to the turntable plane. At the same time, the positioning rod in the footrest ring calibration mechanism rotates with the clamping bracket and approaches the proximity switch. When the reverse flip is in place, the proximity switch sends an initial position reset signal to the controller. The controller stops the flipping motor to ensure the positioning calibration of the initial position of the footrest ring. Subsequently, the controller stops the operation of the fixture cylinder, the fixture cylinder piston rod retracts and drives the movable fixture to reset, loosening the clamping of the footrest ring tube pin. In the next step, pull the handle in the opposite direction to release the clamping state of the support rod, remove the welded joint, and complete the welding operation of the support rod and the two tube pins of the footrest ring. The two sets of joint welding devices can perform two joint welding operations at the same time, doubling the work efficiency.

[0041] In the description of the present utility model, technical terms such as "upper", "lower", "front", "back", "left", "right", "longitudinal", "horizontal", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing and understanding the technical scheme of the present utility model. The above description does not limit the present utility model, and the present utility model is not limited to the examples described above. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present utility model should be deemed to be within the scope of protection of the present utility model.

Claims

1. A fully automatic one-piece welding machine, used for one-piece welding of a support rod (1) and a footrest ring (2) of a swivel chair, wherein the support rod is tubular and has two through holes, and the footrest ring is an arc-shaped structure, with the ends of the tube pins on both sides corresponding to and contacting the two through holes, characterized in that: The welding machine comprises: A frame (10), on which at least one set of one-piece welding devices is mounted, the one-piece welding device comprising a turntable unit, a gun feeding unit, a support rod clamping unit, a footrest ring clamping unit and a controller; A turntable unit, comprising a turntable (20) and a turntable drive mechanism, wherein a base (201) is fixedly arranged on the turntable, the support rod clamping unit and the footrest ring clamping unit are fixedly arranged on the base, and the turntable drive mechanism comprises a turntable motor, the turntable motor is electrically connected to the controller and drives the turntable to rotate; A support rod clamping unit, used for clamping and adjusting the position and angle of the support rod, comprising a support rod clamping mechanism (30) and a support rod flipping mechanism (40) fixedly mounted on the rotating disk; A footrest ring clamping unit, used for clamping and positioning the position and angle of the footrest ring, comprising a footrest ring clamping mechanism (50) and a footrest ring calibration mechanism (60); A gun feeding unit, used for pushing the welding gun deep into the welding area, comprising a welding gun (70) and a welding gun driving mechanism (80), wherein the welding gun is fixed on the frame; The controller (90) is used to control the operation of the above-mentioned units.

2. The fully automatic one-piece welding machine according to claim 1, characterized in that: The support rod clamping mechanism (30) comprises a plurality of support plates (301) and a clamping assembly. The support plates are of equal height and fixed on the base (201) at intervals. The top surface of the support plate is arc-shaped and two rollers (302) are provided on both sides of the arc. The rollers support the support rod. The clamping assembly comprises a pressure wheel frame (303), a pressure wheel (304) and a handle (305). The pressure wheel frame is fixed on the base. The pressure wheel is fixed on the top of the pressure wheel frame and is located above the support rod (1). The handle is connected to the pressure wheel and drives the pressure wheel to press down and press against the support rod. The support rod flipping mechanism (40) comprises a bearing seat (401) and a flip motor (402). The bearing seat is fixed on the base and supports the output shaft of the flip motor. The flip motor is electrically connected to the controller (90). A pipe clamp (403) is fixed on the shaft end of the output shaft of the flip motor. The flip motor is connected to the pipe end of the support rod (1) through the pipe clamp and drives the support rod to rotate.

3. The fully automatic one-piece welding machine according to claim 2, characterized in that: The footrest ring clamping mechanism (50) comprises a clamping bracket (501), two groups of clamps placed on the clamping bracket and a clamp cylinder (502), the clamping bracket is fixed on the pipe clamp and rotates with the pipe clamp, the two groups of clamps are fixed on the clamping bracket, the two groups of clamps are located in the same vertical plane and respectively correspond to the two tube pins of the footrest ring (2), each group of clamps comprises a matching fixed clamping plate (503) and a movable clamping plate (504), the inner surface of the fixed clamping plate is provided with a groove matching the footrest ring tube pin, the movable clamping plate is fixedly connected to the piston rod of the clamp cylinder and expands and contracts with the piston rod, the inner surface of the movable clamping plate is provided with a groove matching the footrest ring tube pin and is enclosed with the groove on the inner surface of the fixed clamping plate to form a clamping hole for accommodating the footrest ring tube pin, and the clamp clamps the footrest ring tube pin through the matching of the movable clamping plate and the fixed clamping plate.

4. The fully automatic one-piece welding machine according to claim 1, 2 or 3, characterized in that: The footrest ring calibration mechanism (60) comprises a proximity switch (601) and a positioning rod (602); the proximity switch is fixedly mounted on the base (201) and is electrically connected to the controller; the positioning rod is fixedly mounted on the footrest ring clamping mechanism (50) and corresponds to the proximity switch.

5. The fully automatic one-piece welding machine according to claim 1, characterized in that: The welding gun driving mechanism (80) comprises a welding gun bracket (801) and a guide rail (802), a slider (803) and a welding gun cylinder (804) arranged on the welding gun bracket. The welding gun bracket is fixed on the above-mentioned frame (10). The welding gun cylinder and the guide rail are both fixed on the welding gun bracket. The guide rail is arranged obliquely and its front end is inclined downward. The end of the welding gun cylinder piston rod is fixedly connected to the tail of the above-mentioned welding gun (70). The slider is embedded in the guide rail and slides along the guide rail. The slider supports the tail of the welding gun and slides with the welding gun. The welding gun head corresponds to the welding area where the end of the footrest ring pin is connected to the outer surface of the support rod.

6. The fully automatic one-piece welding machine according to claim 1, characterized in that: The turntable motor is a servo motor.

7. The fully automatic one-piece welding machine according to claim 2, characterized in that: The flip motor (402) is a servo motor.

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