Iron sheet compass combination welding machine

Abstract

This invention proposes a metal compass combination welding machine, comprising a frame, which includes a pen cap feeding mechanism, a leg feeding mechanism, a material picking mechanism, a loading mechanism, a spot welding mechanism, and a discharge mechanism. The material picking mechanism includes a longitudinally sliding material picking head with a material picking port. The loading mechanism includes a laterally sliding loading head. The spot welding mechanism includes a vertically movable upper welding head and a longitudinally sliding lower welding seat, with a laterally arranged pen cap support. The discharge mechanism includes a laterally sliding discharge gripper. This invention has the advantages of simple structure and low production cost.

Description

Technical Field

[0001] This invention relates to the field of compass production equipment, and specifically to a sheet metal compass assembly welding machine. Background Technology

[0002] Currently, students use a wide variety of compasses. Some use a clamping mechanism to hold a pencil to draw circles, while others combine a compass with a mechanical pencil and draw circles by installing a mechanical pencil lead.

[0003] On November 23, 2022, the applicant applied for a sheet metal compass welding machine, which includes a frame, a feeding mechanism, an alignment mechanism, and a welding mechanism mounted on the frame. The feeding mechanism has a station turntable that rotates intermittently and has several stations. The station turntable includes a receiving station, an orientation calibration station, an orientation adjustment station, and a discharging station along its rotation direction. The alignment mechanism includes a feeding device for receiving pen holders falling from the discharging station, an alignment chuck for clamping the pen holders sent out by the feeding device, and a sensing device for detecting the position of the pen holder joint when the alignment chuck rotates the pen holder. The welding mechanism includes a welding seat for holding the pen holders on the alignment chuck, a welding head located above the welding seat, and a leg conveyor for placing the leg on the pen holder. This equipment is mainly used for welding compasses with automatic pens. Therefore, during the welding process, it is necessary to align the pen holders end to end and align the position of the pen holder joint, so the overall structure of the machine is relatively complex.

[0004] Compasses with clamping mechanisms, which can be used to hold pencils and mechanical pens, are still currently made by injection molding or zinc alloy casting. This also has the problems of high cost, the need for special equipment, and the need for outsourcing to special foundries or injection molding plants, resulting in a long production cycle. Therefore, using sheet metal parts would greatly simplify the production process and reduce production costs. Summary of the Invention

[0005] Based on the above problems, the purpose of this invention is to provide a simple and low-cost sheet metal compass combination welding machine.

[0006] To address the above problems, the following technical solution is provided: a metal compass combination welding machine, comprising a frame, the frame being equipped with a pen cap feeding mechanism, a foot rod feeding mechanism, a picking mechanism, a loading mechanism, a spot welding mechanism, and a discharging mechanism; the picking mechanism includes a longitudinally sliding picking head, the picking head having a picking port; the loading mechanism includes a laterally sliding loading head; the spot welding mechanism includes an upper welding head that can move up and down and a lower welding seat that can move longitudinally, the lower welding seat having a laterally arranged pen cap support; the discharging mechanism includes a laterally sliding discharging gripper; the pen cap feeding mechanism conveys the pen cap to the pen cap discharging port. When the picking head reaches position Q1, the pen cap in the pen cap outlet enters the picking port. Then, the picking head carries the pen cap to position Q2. At the same time, the lower welding seat slides to position X1 and aligns the pen cap support with the picking port. The upper feeding head pushes the pen cap in the picking port onto the pen cap support and then returns to its original position. Then, the lower welding seat slides to position X2 and aligns the pen cap with the leg rod sent out from the leg rod outlet of the leg rod feeding mechanism. At the same time, the picking head returns to position Q1 to pre-install the next pen cap. Then, the upper welding head descends and uses resistance welding to weld the pen cap and leg rod together. Finally, the discharge jaws clamp the pen cap, move it laterally to remove it from the pen cap support, and release the jaws to remove it.

[0007] In the above structure, the leg is formed by stamping metal sheet. Before stamping, the pen sleeve is first punched with an outwardly protruding threaded cylinder and then rolled. Therefore, during welding assembly, the pen sleeve does not need to be distinguished between the beginning and end. At the same time, the pen sleeve is a non-rotating body, so it can be directly fed by the pen sleeve feeding mechanism to ensure the fixed orientation of its threaded cylinder. Since the pen sleeve needs to install pencils and mechanical pencils inside, its ring diameter is often large. Therefore, during welding, it needs to be placed on the pen sleeve support. When the front part of the leg reaches above the pen sleeve, the upper welding head descends to squeeze and fix the two together and discharges to achieve resistance welding to avoid the pen sleeve being flattened. After the picking head reaches position Q1 to take out the pen sleeve, it sends the pen sleeve to position Q2. At the same time, the lower welding seat reaches position X1 to receive the pen sleeve and send it to position X2. When the lower welding seat sends the pen sleeve to position X2 for welding, the picking head resets to position Q1 to receive the next pen sleeve, effectively improving the efficiency of picking, assembly and welding.

[0008] The present invention is further configured such that the pen cap feeding mechanism includes a pen cap vibrating plate and a pen cap conveying slide rail connected to the output end of the pen cap vibrating plate, and the pen cap outlet is located at the end of the pen cap conveying slide rail; the pen cap conveying slide rail has a circular conveying cross section, and a positioning groove is provided at the 6 o'clock position of its cross section.

[0009] In the above structure, when the pen cap is output from the pen cap vibratory feeder, its threaded cylinder is in a downward position. Therefore, when the pen cap is conveyed in the pen cap conveying slide rail, its threaded cylinder slides along the positioning slide groove, which prevents the pen cap from rotating in the pen cap conveying slide rail and causing misalignment between the pen cap seam and the foot rod during welding.

[0010] The present invention is further configured such that a positioning groove is provided at the 6 o'clock position of the material inlet cross-section; an opening is provided at the 12 o'clock position of the material inlet cross-section; and when the material inlet head is located at position Q1, a pen cap detection head is provided above the opening for detecting whether a pen cap exists in the opening.

[0011] In the above structure, when the picking head transfers the pen sleeve, the positioning groove engages with the threaded cylinder of the pen sleeve to prevent the pen sleeve from rotating during the transfer process, which could cause misalignment between the pen sleeve seam and the foot rod during welding. The pen sleeve detection head is used to detect whether a pen sleeve has entered when the picking head is in position Q1. Only when the pen sleeve enters the picking port and is detected by the pen sleeve detection head will the picking head take action to reach position Q2.

[0012] The present invention is further configured such that the pen cap is a C-shaped cylindrical shape formed by stamping and rolling a metal sheet, and the outer wall of the pen cap facing away from the seam is provided with an outwardly stamped and stretched threaded cylinder, and the inner wall of the threaded cylinder is provided with threads. When the pen cap is transported, its threaded cylinder is adapted to the positioning slide or positioning groove so that its seam is in an upward state, so that when the pen cap is welded to the foot rod, the welding point is located at the seam.

[0013] In the above structure, the seam is used as a welding point, which can be used to cover up the defect after welding and ensure the overall strength of the pen cap.

[0014] The present invention is further configured such that the foot bar feeding mechanism includes a foot bar vibrating plate and a foot bar conveying slide rail connected to the output end of the foot bar vibrating plate, the foot bar outlet is located at the end of the foot bar conveying slide rail; the end of the foot bar conveying slide rail is provided with a foot bar blocking mechanism for blocking and positioning the end foot bar.

[0015] In the above structure, the foot rod feeding mechanism is also equipped with a foot rod detection head. When the foot rod detection head located at the end of the foot rod conveying slide rail detects the foot rod, the spot welding mechanism controls the upper welding head to descend and spot weld the foot rod and pen cap.

[0016] The invention is further configured such that the pen cap is welded to the front section of the foot rod, the rear end of the foot rod is a hinge plate, and the foot rod blocking mechanism is a cylinder, which uses the extension of its cylinder rod to abut against the hinge plate to prevent the foot rod from falling and to provide positioning for welding the foot rod to the pen cap; before the discharge gripper clamps the pen cap and moves it laterally to remove it from the pen cap support, the cylinder rod of the foot rod blocking mechanism retracts.

[0017] In the above structure, when the cylinder rod is extended, the spot welding mechanism is in standby mode before the foot rod detection head detects that the foot rod has reached its position.

[0018] The present invention is further configured such that the diameter of the feeding head is greater than the outer diameter of the pen cap and smaller than the cross-sectional size of the feeding port; when the feeding head reaches the Q2 position and the lower welding seat slides to the X1 position, the feeding head, the feeding port and the pen cap support are collinear.

[0019] In the above structure, the feeding head can be directly and accurately inserted into the feeding port to push out the pen cap inside the feeding port and put it onto the pen cap support.

[0020] The present invention is further configured such that the spot welding mechanism includes a welding cabinet, the two output electrodes of the welding cabinet are respectively connected to the lower welding seat and the upper welding head; the pen sleeve support is detachably connected to the lower welding seat.

[0021] In the above structure, the pen cap support is a consumable electrode that will gradually wear down during the welding process, so it is designed to be detachable for easy replacement and maintenance later.

[0022] The present invention is further configured such that the lower welding seat and the upper welding head are made of copper.

[0023] The above structure ensures the reliability of welding.

[0024] The invention is further configured such that the frame is also provided with a receiving port, and a discharge channel is provided below the receiving port. When the discharge claw clamps the pen cap and moves it laterally to remove it from the pen cap support and releases the claw, the welded pen cap and foot rod fall into the receiving port and are discharged from the discharge channel.

[0025] In the above structure, after the discharge gripper removes the pen cap and foot rod from the pen cap support, it resets and releases, allowing the welded pen cap and foot rod to fall naturally.

[0026] The invention is further configured such that after the lower welding seat slides to the X2 position, the discharge jaws extend to clamp the pen cap and position it, and then the welding operation is performed after the foot rod is in place.

[0027] The above structure can prevent the foot rod from contacting the pen cap when it falls, thus avoiding the pen cap being pushed away from the pen cap support and affecting the welding accuracy of the two.

[0028] The invention is further configured such that the material handling mechanism slides between positions Q1 and Q2 under the control of a cylinder and a slider; the material feeding mechanism extends and retracts under the control of a cylinder or a cylinder and a slider; the lower welding seat of the spot welding mechanism slides between positions X1 and X2 under the control of a cylinder and a slider; the upper welding head is raised and lowered under the control of a cylinder and a slide rail; and the material discharge mechanism's discharge gripper extends and retracts under the control of a cylinder and a slider while simultaneously clamping and releasing under the control of a clamping cylinder.

[0029] The beneficial effects of this invention are as follows: The foot rod is formed by stamping metal sheet. Before stamping, the pen sleeve is first punched with an outwardly protruding threaded cylinder and then rolled. Therefore, during welding assembly, the pen sleeve does not need to be distinguished between the beginning and end. At the same time, the pen sleeve is a non-rotating body, so it can be directly fed by the pen sleeve feeding mechanism to ensure the fixed orientation of its threaded cylinder. Since the pen sleeve needs to install pencils and mechanical pencils inside, its ring diameter is often large. Therefore, during welding, it needs to be placed on the pen sleeve support. When the front part of the foot rod reaches above the pen sleeve, the upper welding head descends to squeeze and fix the two together and discharges to achieve resistance welding to avoid the pen sleeve being flattened. After the picking head reaches position Q1 to take out the pen sleeve, it sends the pen sleeve to position Q2. At the same time, the lower welding seat reaches position X1 to receive the pen sleeve and send it to position X2. When the lower welding seat sends the pen sleeve to position X2 and performs welding, the picking head resets to position Q1 to receive the next pen sleeve, effectively improving the efficiency of picking, assembly and welding. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0031] Figure 2 This is a partial three-dimensional structural diagram of the whole machine from a first-view perspective of the present invention.

[0032] Figure 3 This is a partial three-dimensional structural diagram of the whole machine from a second perspective of the present invention.

[0033] Figure 4 For the present invention Figure 2 A 3D structural diagram of the pen cap before it is fitted with material.

[0034] Figure 5 For the present invention Figure 2 A magnified structural diagram of part A.

[0035] Figure 6 For the present invention Figure 3 A magnified structural diagram of part B.

[0036] Figure 7 For the present invention Figure 3 A magnified structural diagram of part C.

[0037] Figure 8 For the present invention Figure 4 A magnified structural diagram of part D.

[0038] Figure 9 This is a first-view three-dimensional structural diagram of the pen cap and foot rod in the welded state of the present invention.

[0039] Figure 10 This is a second-view three-dimensional structural diagram of the pen cap and foot rod in the welding state of the present invention.

[0040] Figure 11This is a three-dimensional structural diagram of the pen cap and foot in an exploded state according to the present invention.

[0041] Figure 12 For the present invention Figure 1 A magnified structural diagram of part E.

[0042] The labels in the diagram mean: 10-Frame; 11-Material inlet; 12-Discharge channel; 20-Pen sleeve feeding mechanism; 21-Pen sleeve vibratory feeder; 22-Pen sleeve conveying rail; 221-Pen sleeve outlet; 222-Positioning groove; 30-Leg feeding mechanism; 31-Leg vibratory feeder; 32-Leg conveying rail; 321-Leg outlet; 33-Leg blocking mechanism; 40-Material handling mechanism; 41- 42-Feeding head; 421-Positioning slot; 422-Opening; 43-Pen sleeve detection head; 50-Feeding mechanism; 51-Feeding head; 60-Spot welding mechanism; 61-Upper welding head; 62-Lower welding seat; 621-Pen sleeve support; 63-Welding cabinet; 70-Discharge mechanism; 71-Discharge gripper; a-Pen sleeve; a1-Threaded cylinder; a2-Seam; b-Leg; b1-Hinge plate. Detailed Implementation

[0043] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0044] refer to Figures 1 to 12 ,like Figures 1 to 12The illustrated sheet metal compass combination welding machine includes a frame 10, which is equipped with a pen cap feeding mechanism 20, a foot rod feeding mechanism 30, a picking mechanism 40, a loading mechanism 50, a spot welding mechanism 60, and a discharging mechanism 70. The picking mechanism 40 includes a longitudinally sliding picking head 41 with a picking port 42. The loading mechanism 50 includes a laterally sliding loading head 51. The spot welding mechanism 60 includes a vertically lifting upper welding head 61 and a longitudinally sliding lower welding seat 62, with a laterally arranged pen cap support 621. The discharging mechanism 70 includes a laterally sliding discharging gripper 71. The pen cap feeding mechanism 20 conveys the pen cap a to the pen cap discharging port 221, and the picking head 41 reaches Q1. The pen cap a in the pen cap outlet 221 is positioned so that it enters the pick-up port 42. Then, the pick-up head 41 carries the pen cap a to the Q2 position. At the same time, the lower welding seat 62 slides to the X1 position and aligns the pen cap support 621 with the pick-up port 42. The upper feeding head 51 pushes the pen cap a in the pick-up port 42 onto the pen cap support 621 and then returns to its original position. Then, the lower welding seat 62 slides to the X2 position so that the pen cap a is aligned with the leg b sent out from the leg outlet 321 of the leg feeding mechanism 30. At the same time, the pick-up head 41 returns to the Q1 position to pre-install the next pen cap a. Then, the upper welding head 61 descends and uses resistance welding to weld the pen cap a and the leg b together. Finally, the discharge jaw 71 clamps the pen cap a located on the pen cap support 621, moves it laterally to remove it from the pen cap support 621, and releases the jaw to remove it.

[0045] In the above structure, the foot rod b is formed by stamping a metal sheet. Before stamping, the pen sleeve a is first punched with an outwardly protruding threaded cylinder a1, and then rolled. Therefore, during welding assembly, the pen sleeve a does not need to distinguish between its beginning and end. Since the pen sleeve a is a non-rotating body, it can be directly fed using the pen sleeve feeding mechanism 20 to ensure the fixed orientation of its threaded cylinder a1. Because the pen sleeve a needs to house a pencil or mechanical pencil, after installation, it is clamped and fixed by tightening the screw (not shown in the figure) installed on the threaded cylinder a1. Therefore, its ring diameter is often large, and during welding... It needs to be placed on the pen cap support 621. When the front part of the foot rod b reaches above the pen cap a, the upper welding head 61 descends to squeeze and fix the two together and discharge to achieve resistance welding to prevent the pen cap a from being flattened. After the material picking head 41 reaches the Q1 position to pick up the pen cap a, it sends the pen cap a to the Q2 position. At the same time, the lower welding seat 62 reaches the X1 position to receive the pen cap a and send it to the X2 position. When the lower welding seat 62 sends the pen cap to the X2 position and performs welding, the material picking head 41 resets to the Q1 position to receive the next pen cap a, which effectively improves the efficiency of material picking, assembly and welding.

[0046] In this embodiment, the pen sleeve feeding mechanism 20 includes a pen sleeve vibrating plate 21 and a pen sleeve conveying slide rail 22 that is connected to the output end of the pen sleeve vibrating plate 21. The pen sleeve outlet 221 is located at the end of the pen sleeve conveying slide rail 22. The pen sleeve conveying slide rail 22 has a circular conveying cross section, and a positioning groove 222 is provided at the 6 o'clock position of its cross section.

[0047] In the above structure, when the pen cap a is output from the pen cap vibrating plate 21, its threaded cylinder a1 is in a downward position. Therefore, when the pen cap a is conveyed in the pen cap conveying slide rail 22, its threaded cylinder a1 slides along the positioning slide groove 222, which prevents the pen cap a from rotating in the pen cap conveying slide rail 22 and causing the joint a2 of the pen cap a to be misaligned with the foot rod b during welding.

[0048] In this embodiment, a positioning groove 421 is provided at the 6 o'clock position of the cross-section of the material inlet 42; an opening 422 is provided at the 12 o'clock position of the cross-section of the material inlet 42; when the material inlet head 41 is located at position Q1, a pen cap detection head 43 is provided above the opening 422 for detecting whether there is a pen cap a inside the opening 422.

[0049] In the above structure, when the picking head 41 transfers the pen sleeve a, the positioning groove 421 cooperates with the threaded cylinder a1 of the pen sleeve a to prevent the pen sleeve a from rotating during the transfer process, which would cause the joint a2 of the pen sleeve a to be misaligned with the foot rod b during welding; the pen sleeve detection head 43 is used to detect whether the pen sleeve a has entered when the picking head 41 is in position Q1. Only when the pen sleeve a enters the picking port 42 and is detected by the pen sleeve detection head 43 will the picking head 41 take action to reach position Q2.

[0050] In this embodiment, the pen cap a is a C-shaped cylinder formed by stamping and rolling a metal sheet. The outer wall of the pen cap a facing away from the joint a2 is provided with a threaded cylinder a1 formed by outward stamping and stretching. The inner wall of the threaded cylinder a1 is provided with threads. When the pen cap a is transported, its threaded cylinder a1 is adapted to the positioning slide groove 222 or positioning groove 421 so that its joint a2 is in an upward state, so that when the pen cap a is welded to the foot rod b, the welding point is located at the joint a2.

[0051] In the above structure, the joint a2 position is used as the welding point, which can be used to cover up the defect after welding and ensure the overall strength of the pen cap a.

[0052] In this embodiment, the foot pole feeding mechanism 30 includes a foot pole vibrating plate 31 and a foot pole conveying slide rail 32 that is connected to the output end of the foot pole vibrating plate 31. The foot pole discharge port 321 is located at the end of the foot pole conveying slide rail 32. The end of the foot pole conveying slide rail 32 is provided with a foot pole blocking mechanism 33 for blocking and positioning the end foot pole b.

[0053] In the above structure, the foot rod feeding mechanism 30 is also provided with a foot rod detection head (not shown in the figure). When the foot rod detection head (not shown in the figure) located at the end of the foot rod conveying slide rail 32 detects the foot rod b, the spot welding mechanism 60 controls the upper welding head 61 to descend and spot weld the foot rod b and the pen sleeve a.

[0054] In this embodiment, the pen cap a is welded to the front part of the foot rod b, the rear end of the foot rod b is a hinge plate b1, and the foot rod blocking mechanism 33 is a cylinder. The cylinder rod extends outward and abuts against the hinge plate b1 to prevent the foot rod b from falling, thus providing positioning for the welding of the foot rod b and the pen cap a. Before the discharge gripper 71 clamps the pen cap a and moves it laterally to remove it from the pen cap support 621, the cylinder rod of the foot rod blocking mechanism 33 retracts.

[0055] In the above structure, when the cylinder rod is extended, before the foot rod detection head (not shown in the figure) detects that the foot rod b has reached its position, the spot welding mechanism 60 is in standby mode.

[0056] In this embodiment, the diameter of the feeding head 51 is greater than the outer diameter of the pen cap a and smaller than the cross-sectional size of the picking port 42; when the picking head 41 reaches the Q2 position and the lower welding seat 62 slides to the X1 position, the feeding head 51, the picking port 42 and the pen cap support 621 are in a collinear state.

[0057] In the above structure, the feeding head 51 can be directly and accurately inserted into the feeding port 42 to push out the pen cap a inside the feeding port 42 and put it onto the pen cap support 621.

[0058] In this embodiment, the spot welding mechanism 60 further includes a welding cabinet 63, the two output electrodes of which are respectively connected to the lower welding seat 62 and the upper welding head 61; the pen sleeve support 621 is detachably connected to the lower welding seat 62.

[0059] In the above structure, the pen cap support 621 is a consumable electrode that will gradually wear down during the welding process. Therefore, it is designed to be detachable for easy replacement and maintenance later.

[0060] In this embodiment, the lower welding seat 62 and the upper welding head 61 are made of copper.

[0061] The above structure ensures the reliability of welding.

[0062] In this embodiment, the frame 10 is also provided with a receiving port 11, and a discharge channel 12 is provided below the receiving port 11. When the discharge claw 71 clamps the pen cap a and moves it laterally to remove it from the pen cap support 621 and releases the claw, the welded pen cap a and the foot rod b fall into the receiving port 11 and are discharged from the discharge channel 12.

[0063] In the above structure, after the discharge gripper 71 removes the pen cap a and foot bar b from the pen cap support column 621, it resets and releases, allowing the welded pen cap a and foot bar b to fall naturally.

[0064] In this embodiment, after the lower welding seat 62 slides to the X2 position, the discharge gripper 71 extends to clamp the pen cap a and position it, and then waits for the foot bar b to be in place before performing the welding operation.

[0065] In the above structure, it is possible to avoid the foot bar b coming into contact with the pen cap a when it falls, which would cause the pen cap a to be pushed away from the pen cap support 621 and affect the welding accuracy of the two.

[0066] In this embodiment, the material handling mechanism 40 is controlled to slide between positions Q1 and Q2 by a cylinder (existing control method) and a slider (existing cooperation method); the feeding mechanism 50 is controlled to extend and retract the feeding head 51 by a cylinder (existing control method) or a cylinder (existing control method) and a slider (existing cooperation method); the lower welding seat 62 of the spot welding mechanism 60 is controlled to slide between positions X1 and X2 by a cylinder (existing control method) and a slider (existing cooperation method); the upper welding head 61 is controlled to rise and fall by a cylinder (existing control method) and a slide rail (existing cooperation method); the discharge gripper 71 of the discharge mechanism 70 is controlled to extend and retract by a cylinder (existing control method) and a slider (existing cooperation method), while simultaneously using a clamping cylinder (existing clamping method) to control clamping and releasing.

[0067] The beneficial effects of this invention are as follows: The foot rod is formed by stamping metal sheet, and the pen sleeve is punched out with a protruding threaded cylinder before being rolled. Therefore, during welding assembly, the pen sleeve does not need to be distinguished between the beginning and end. At the same time, the pen sleeve is a non-rotating body, so it can be directly fed by the pen sleeve feeding mechanism 20 to ensure the fixed orientation of its threaded cylinder. Since the pen sleeve needs to install pencils and mechanical pencils inside, its ring diameter is often large. Therefore, during welding, it needs to be fitted onto the pen sleeve support 621. When the front part of the foot rod reaches above the pen sleeve, the upper welding head 61 descends to squeeze and fix the two together and discharges to achieve resistance welding to avoid the pen sleeve being flattened. After the material taking head 41 reaches the Q1 position to take out the pen sleeve, it sends the pen sleeve to the Q2 position. At the same time, the lower welding seat 62 reaches the X1 position to receive the pen sleeve and send it to the X2 position. When the lower welding seat 62 sends the pen sleeve to the X2 position for welding, the material taking head 41 returns to the Q1 position to receive the next pen sleeve, which effectively improves the efficiency of material taking, assembly and welding.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications assumed above should also be considered within the scope of protection of the present invention.

Claims

1. A sheet metal compass combination welding machine, comprising a frame, characterized in that: The frame is equipped with a pen sleeve feeding mechanism, a leg feeding mechanism, a picking mechanism, a loading mechanism, a spot welding mechanism, and a discharging mechanism. The picking mechanism includes a longitudinally sliding picking head with a picking port. The loading mechanism includes a laterally sliding loading head. The spot welding mechanism includes a vertically lifting upper welding head and a longitudinally sliding lower welding seat with a laterally arranged pen sleeve support. The discharging mechanism includes a laterally sliding discharging gripper. The pen sleeve feeding mechanism conveys the pen sleeve to the pen sleeve discharging port, and the picking head discharging the pen sleeve at position Q1. The pen cap enters the feeding port, and then the feeding head carries the pen cap to position Q2. At the same time, the lower welding seat slides to position X1 and aligns the pen cap support with the feeding port. The upper feeding head pushes the pen cap from the feeding port onto the pen cap support and then returns to its original position. Then, the lower welding seat slides to position X2 and aligns the pen cap with the leg rod delivered from the leg rod outlet of the leg rod feeding mechanism. At the same time, the feeding head returns to position Q1 to pre-install the next pen cap. Then, the upper welding head descends and uses resistance welding to weld the pen cap and leg rod together. Finally, the discharge jaws clamp the pen cap, move it laterally to remove it from the pen cap support, and release the jaws to remove it. The foot rod feeding mechanism includes a foot rod vibratory plate and a foot rod conveying slide rail connected to the output end of the foot rod vibratory plate. The foot rod outlet is located at the end of the foot rod conveying slide rail. The end of the foot rod conveying slide rail is provided with a foot rod blocking mechanism for blocking and positioning the end foot rod. The pen cap is welded to the front section of the foot rod. The rear end of the foot rod is a hinge plate. The foot rod blocking mechanism is a cylinder. The cylinder rod extends outward and abuts against the hinge plate to prevent the foot rod from falling, providing positioning for welding the foot rod to the pen cap. Before the discharge gripper clamps the pen cap and moves it laterally to remove it from the pen cap support, the cylinder rod of the foot rod blocking mechanism retracts.

2. The sheet metal compass combination welding machine according to claim 1, characterized in that: The pen sleeve feeding mechanism includes a pen sleeve vibrating plate and a pen sleeve conveying slide rail that is connected to the output end of the pen sleeve vibrating plate. The pen sleeve outlet is located at the end of the pen sleeve conveying slide rail. The pen sleeve conveying slide rail has a circular conveying cross section, and a positioning groove is provided at the 6 o'clock position of its cross section.

3. The sheet metal compass combination welding machine according to claim 2, characterized in that: A positioning groove is provided at the 6 o'clock position of the material inlet cross-section; an opening is provided at the 12 o'clock position of the material inlet cross-section; when the material inlet head is located at position Q1, a pen cap detection head is provided above the opening for detecting whether a pen cap exists in the opening.

4. The sheet metal compass combination welding machine according to claim 3, characterized in that: The pen cap is a C-shaped cylinder formed by stamping and rolling a metal sheet. The outer wall of the pen cap facing away from the seam is provided with a threaded cylinder formed by outward stamping and stretching. The inner wall of the threaded cylinder is provided with threads. When the pen cap is transported, its threaded cylinder is adapted to the positioning slide or positioning groove so that its seam is facing upward, so that when the pen cap is welded to the foot rod, the welding point is located at the seam.

5. The sheet metal compass combination welding machine according to claim 1, characterized in that: The diameter of the feeding head is greater than the outer diameter of the pen cap and smaller than the cross-sectional size of the feeding port; when the feeding head reaches the Q2 position and the lower welding seat slides to the X1 position, the feeding head, the feeding port and the pen cap support are collinear.

6. The sheet metal compass combination welding machine according to claim 1, characterized in that: The spot welding mechanism also includes a welding cabinet, the two output electrodes of which are respectively connected to the lower welding seat and the upper welding head; the pen sleeve support is detachably connected to the lower welding seat.

7. A sheet metal compass combination welding machine according to claim 6, characterized in that: The lower welding seat and upper welding head are made of copper.

8. The sheet metal compass combination welding machine according to claim 1, characterized in that: The frame is also provided with a receiving port, and a discharge channel is provided below the receiving port. When the discharge claw clamps the pen cap and moves it laterally to remove it from the pen cap support and releases the claw, the welded pen cap and foot rod fall into the receiving port and are discharged from the discharge channel.

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