Dual-purpose arc-pulling stud welding gun and control circuit thereof

Abstract

The application discloses a dual-purpose arc drawing type stud welding gun and a control circuit thereof, and relates to the technical field of welding.The dual-purpose arc drawing type stud welding gun comprises a shell, a main shaft and a solenoid valve, and the shell is internally provided with a positioning portion; and the surface of the shell is provided with an adjusting opening communicating with a cavity.The main shaft is provided with an elastic member and an adjusting member, the two ends of the elastic member are respectively in abutment with the positioning portion and the adjusting member, the adjusting member is threadedly connected with the main shaft, the adjusting member protrudes out of the adjusting opening, and the adjusting member can be adjusted in position on the main shaft and can adjust the pressing force between the elastic member and the positioning portion.The solenoid valve is used for controlling the axial movement of the main shaft.A control circuit comprises a power supply, an adjusting switch and a switching switch, is provided with an anode circuit and a cathode circuit, the anode circuit is connected with a connecting terminal, and a resistor is arranged at any position on the anode circuit and the cathode circuit.The adjusting switch is connected in parallel with the resistor, the voltage value output by the power supply can be changed when the adjusting switch is turned on and turned off, the requirement of different welding processes for different voltages is realized, and the use flexibility is improved.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a dual-purpose arc-type stud welding torch and its control circuit. Background Technology

[0002] There are various methods of metal welding. Current thermal welding uses electrodes to press the plates tightly together and applies a large current to melt the metal plates, thus achieving a welded joint. The basic principle of arc stud welding is to ignite an electric arc between the stud and the workpiece. When the stud and the workpiece are heated to a suitable temperature, the stud is pushed into the weld pool on the workpiece under the action of external force to form a weld joint. The movement of the stud is mainly accomplished by the on and off of the spring coil of the welding torch and the compression and release of the spring. That is, when the welding torch switch is pulled, the electromagnetic coil in the welding torch is energized, causing the moving iron core to move upward. The stud maintains a certain distance from the metal plate. After the preset welding time is reached, the electromagnetic coil is de-energized. Under the action of the spring force and the weight of the moving iron core itself, the stud is injected into the weld pool to complete the welding. However, current welding torches can only perform one welding function. When different welding processes are performed on different parts of the workpiece, the welding torch needs to be changed, which is complicated and the equipment cost is high. Moreover, in arc welding, different plate thicknesses or materials require different arc initiation distances. Currently, the arc initiation distance cannot be adjusted and the welding torch or spring needs to be changed, which is complicated. At the same time, different welding processes require different currents, which need to be controlled and adjusted by circuits in actual use. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a dual-purpose arc welding torch and its control circuit, which combines the functions of current resistance welding and arc welding, increasing the flexibility of use and reducing equipment costs.

[0004] According to a first aspect of the present invention, a dual-purpose arc-drawing stud welding torch is provided, comprising a housing, a spindle, and a solenoid valve. The housing has a cavity and a positioning part within it. An adjustment port communicating with the cavity is provided on the surface of the housing. The spindle is movably connected to the housing and has an elastic element and an adjustment element. The two ends of the elastic element abut against the positioning part and the adjustment element, respectively. The adjustment element is threadedly connected to the spindle and protrudes from the adjustment port. The adjustment element can be adjusted in position on the spindle and adjust the pressure between the elastic element and the positioning part. The solenoid valve is connected to one end of the spindle and is used to control the axial movement of the spindle.

[0005] The dual-purpose arc-type stud welding torch described in the first aspect of this invention has at least the following beneficial effects: This embodiment includes a housing, a spindle, and a solenoid valve. The housing contains a positioning part, and the surface of the housing has an adjustment port communicating with a cavity. The spindle is movably connected to the housing and has an elastic element and an adjustment element. The two ends of the elastic element abut against the positioning part and the adjustment element, respectively. The adjustment element is threadedly connected to the spindle, allowing its position on the spindle to be adjusted. The adjustment element protrudes from the adjustment port to allow for manual adjustment of its position. The adjustment element can adjust the pressure between the elastic element and the positioning part to adjust the arc-ignition distance of the piston during arc welding. Simultaneously, in current-resistant heat-resistant welding processes, a high-voltage current spindle needs to be pressed against the workpiece surface, thus requiring high spring pressure. Therefore, the adjustable spring force also facilitates changes in the welding method. The solenoid valve is connected to one end of the spindle and is used to control the axial movement of the spindle to achieve the arc-ignition action during arc welding.

[0006] According to the first aspect of the present invention, a dual-purpose arc-type stud welding torch has a scale on the adjustment port for displaying the position of the adjustment component.

[0007] According to the first aspect of the present invention, a dual-purpose arc-drawing stud welding torch is provided with a drive block on the solenoid valve. The drive block is connected to one end of the spindle and drives the spindle to move.

[0008] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun has a spindle that passes through a positioning part. The spindle has a positioning surface, and the positioning part has a limiting member that cooperates with the positioning surface, thereby limiting the rotation of the spindle.

[0009] According to the first aspect of the present invention, a dual-purpose arc-drawing stud welding gun has limiting members located on both sides of the positioning part.

[0010] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun has an opening in the limiting member, the opening cooperating with the positioning surface, and the openings in the limiting members located on both sides of the positioning part are arranged opposite to each other.

[0011] According to the first aspect of the present invention, a dual-purpose arc-drawing stud welding gun is provided with a receiving groove on the adjusting member, and one end of the elastic member is embedded in the receiving groove.

[0012] According to the first aspect of the present invention, a dual-purpose arc welding torch is provided with a button and a circuit switch inside the housing. The circuit switch is movably connected to the housing and protrudes outside the housing, and the button is in contact with the circuit switch.

[0013] According to a first aspect of the present invention, a dual-purpose arc welding torch has a housing comprising a first cover and a second cover that interlock with each other, with a cavity formed between the first cover and the second cover.

[0014] According to the first aspect of the present invention, a dual-purpose arc-drawing stud welding gun is provided on the housing, and a connecting part is provided on the first cover and the second cover near the adjustment port. The locking block is fitted into the connecting part to connect the first cover and the second cover.

[0015] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun is provided in the joint portion with a guide member for guiding the movement of the main shaft, and the main shaft is inserted into the guide member.

[0016] According to the first aspect of the present invention, a dual-purpose arc welding torch is provided with a mounting plate on a locking block, and a support frame is mounted on the mounting plate, the support frame extending away from the housing.

[0017] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun has a plurality of mounting holes on the mounting plate for adjusting the mounting position of the support frame.

[0018] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun has a connecting part at one end of the main shaft, the connecting part having a cavity, and the side wall of the connecting part having a plurality of slits.

[0019] According to the first aspect of the present invention, a dual-purpose arc-type stud welding torch has an inlet hole on its spindle for connecting to a power source.

[0020] According to the first aspect of the present invention, a dual-purpose arc-type stud welding gun is provided in the housing for connecting to a power source. The connecting terminal is fixedly connected to the housing, and a wire is provided between the connecting terminal and the inlet hole.

[0021] According to a second aspect of the present invention, a control circuit is provided, including a power supply, an adjustment switch, and a switching switch. It includes an anode line and a cathode line, with the anode line connected to a connection terminal. A resistor is disposed at either point on the anode line or the cathode line. The adjustment switch is connected in parallel with the resistor, and opening and closing the adjustment switch changes the voltage value output by the power supply. The switching switch includes a current-resistance welding mode and an arc welding mode. When the switching switch is in the arc welding mode, pressing a button disconnects the adjustment switch. After the anode line outputs voltage for a preset time, a solenoid valve is activated, causing the spindle to retract a certain distance, completing the arc drawing action.

[0022] The control circuit described in this invention has at least the following beneficial effects: This embodiment includes a power supply, an adjustment switch, and a switching switch. It has an anode line and a cathode line. The anode line is connected to a connection terminal for connecting the spindle and outputting current. A resistor is installed at either the anode or cathode line. The adjustment switch is connected in parallel with the resistor to change the connection and disconnection of the resistor in the main circuit. Therefore, opening and closing the adjustment switch can change the voltage value output by the power supply, adapting to the different voltage requirements of current-resistance welding and arc welding, achieving versatility between different processes. The switching switch includes a current-resistance welding mode and an arc welding mode. When the switching switch is in arc welding mode, pressing the button disconnects the adjustment switch. After the anode line outputs voltage for a preset time, the solenoid valve starts and drives the spindle to retract a certain distance, completing the arc drawing action, which facilitates the arc welding operation.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0025] Figure 1 This is an isometric view of a dual-purpose arc-type stud welding gun according to an embodiment of the present invention;

[0026] Figure 2 This is a top view of a dual-purpose arc-type stud welding gun according to an embodiment of the present invention;

[0027] Figure 3 This is an isometric view of the fixing device according to an embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view of the fixing device according to an embodiment of the present invention;

[0029] Figure 5 This is a partial view showing the cooperation between the detection device and the conversion station in an embodiment of the present invention.

[0030] Figure label:

[0031] Housing 100; First cover 101; Second cover 102; Joint 103; Locking block 104; Guide 105; Mounting plate 106; Support frame 107; Stop 108; Positioning part 109; Limiting member 110; Opening 111; Button 112; Circuit switch 113; Connecting terminal 114; Wire 115; Scale 116; Adjustment port 117; Locking nut 118; Mounting hole 119;

[0032] Main spindle 120; connecting part 121; gap 122; positioning surface 123; inlet hole 124; slot 125; positioning snap ring 126; connecting nut 127;

[0033] Elastic element 130; Adjusting element 131; Receiving groove 132; Gasket 133;

[0034] Solenoid valve 140; drive block 141. Detailed Implementation

[0035] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1 to 5An embodiment of the first aspect of the present invention provides a dual-purpose arc welding torch, comprising a housing 100, a spindle 120, and a solenoid valve 140. The housing 100 has a cavity, the spindle 120 is disposed within the housing 100, and the solenoid valve 140 is located at one end of the spindle 120. The solenoid valve 140 is used to drive the spindle 120 to move. The housing 100 is provided with a positioning part 109, and the surface of the housing 100 is provided with an adjustment port 117 communicating with the cavity. Specifically, the housing 100 includes a first cover 101 and a second cover 102 that are interlocked with each other, forming a cavity between the first cover 101 and the second cover 102. At the same time, the housing 100 is provided with a locking block 104, and the first cover 101 and the second cover 102 are each provided with a connecting part 103 at one end near the adjustment port 117. The locking block 104 is fitted into the connecting part 103, so that the first cover 101 and the second cover 102 are connected. On the other hand, the first cover 101 and the second cover 102 are fixed together by bolts or snap-fit. Optionally, the housing 100 is provided with a locking block 104, and both the first cover 101 and the second cover 102 are provided with a connecting portion 103 at one end near the adjustment port 117. The connecting portion 103 extends outward from the end of the first cover 101 and the second cover 102, and the locking block 104 fits into the connecting portion 103, thereby connecting the first cover 101 and the second cover 102. It can be understood that the connection between the locking block 104 and the connecting portion 103 is an arc surface fit, and at least two bolts are provided in the circumferential direction of the locking block 104. The ends of the bolts abut against the radial surface of the connecting portion 103, thereby realizing the connection between the locking block 104 and the connecting portion 103. Furthermore, a mounting plate 106 is fitted onto the locking block 104, and a support frame 107 is mounted on the mounting plate 106. At least two support frames 107 are provided, extending away from the housing 100. The support frames 107 are used to abut against the workpiece surface during arc welding, generating an arc-drawing effect when the spindle 120 discharges and retracts. (Refer to...) Figure 5 The mounting plate 106 has several mounting holes 119 in the circumferential direction. The mounting holes 119 are used to adjust the mounting position of the support frame 107, which is convenient for flexible adjustment according to different process requirements. Optionally, the surface of the locking block 104 is provided with threads, and a locking nut 118 is provided that engages with the threads of the locking block 104. The mounting plate 106 is fixed to the locking block 104 by the locking nut 118.

[0040] Optionally, the joint 103 is provided with a guide 105 to guide the movement of the main shaft 120. The main shaft 120 is inserted into the guide 105. The guide 105 is made of metal or hard plastic material with self-lubricating properties. The radial inner wall of the guide 105 cooperates with the radial outer wall of the main shaft 120 to ensure the stability and smoothness of the extension and retraction of the main shaft 120.

[0041] Reference Figure 2The spindle 120 is movably connected within the housing 100. The spindle 120 is equipped with an elastic element 130 and an adjusting element 131. The two ends of the elastic element 130 abut against the positioning part 109 and the adjusting element 131, respectively. The adjusting element 131 is threadedly connected to the spindle 120, allowing its position on the spindle 120 to be adjusted. The adjusting element 131 protrudes from the adjusting port 117 to enable manual adjustment of its position. The adjusting element 131 can adjust the pressure between the elastic element 130 and the positioning part 109 to adjust the arc-ignition distance of the piston during arc welding. Simultaneously, in current-resistant heat-resistant welding processes, the spindle 120, carrying a high-voltage current, needs to press against the workpiece surface, thus requiring higher spring pressure. Therefore, adjustable spring force facilitates changes in welding methods. A solenoid valve 140 is connected to one end of the spindle 120 and is used to control the axial movement of the spindle 120 to achieve the arc-ignition action during arc welding. Optionally, the adjustment port 117 is provided with a scale 116, which is used to display the position of the adjustment component 131, facilitating actual operation by the worker. Optionally, the solenoid valve 140 is provided with a drive block 141, which is connected to one end of the spindle 120. The drive block 141 is moved during the opening and closing of the circuit, thereby driving the spindle 120 to move and achieve the arc-drawing action during the welding process. Specifically, the solenoid valve 140 is located at the end of the spindle 120 away from the joint 103, as shown in the figure. Figure 3 One end of the drive block 141 is embedded in the end of the spindle 120, and the drive block 141 and the spindle 120 are connected by bolts.

[0042] Optionally, the spindle 120 passes through the positioning part 109, which restricts the rotation of the spindle 120 during telescopic movement. The spindle 120 has a positioning surface 123, which is planar and at least one such surface is provided. The positioning part 109 has a limiting member 110 that mates with the positioning surface 123, thereby restricting the rotation of the spindle 120. (Refer to...) Figures 2 to 4 The limiting member 110 is provided on at least one side of the positioning part 109. In this application, the limiting member 110 is provided on both sides of the positioning part 109. The limiting member 110 has an opening 111, which is C-shaped. The inner wall of the opening 111 mates with the positioning surface 123. The positioning surface 123 extends a certain distance along the length of the main shaft 120, so that the limiting member 110 maintains its engagement with the positioning surface 123 during the movement of the main shaft 120. At the same time, the openings 111 in the limiting members 110 located on both sides of the positioning part 109 are arranged opposite each other, which helps to prevent the lateral translation of the main shaft 120. Optionally, the positioning part 109 has grooves for inserting the limiting member 110 at both ends. Optionally, a gasket 133 is provided on the side of the positioning part 109 near the connecting part 103. The gasket 133 is provided between the limiting member 110 and the elastic member 130 to increase the contact area between the elastic member 130 and the limiting member 110 and ensure structural stability. Reference Figure 3 and Figure 4 A slot 125 is provided on the main shaft 120, and a positioning spring 126 is fastened to the slot 125. The diameter of the positioning spring 126 is larger than the diameter of the main shaft 120. The positioning spring 126 abuts against the axial end of the housing 100 to limit the movement of the main shaft 120. Optionally, the slot 125 is located on the side of the adjusting member 131 away from the solenoid valve 140. Optionally, the adjusting member 131 is provided with a receiving groove 132, located at the end of the adjusting member 131. One end of the elastic member 130 is embedded in the receiving groove 132, which helps to ensure the stability of the end of the elastic member 130 and avoid the elastic member 130 from slipping, thus preventing unstable elastic force. Optionally, the elastic member 130 is preferably a helical spring, including a single-threaded or multi-threaded helical spring, which helps to maintain a compact structure.

[0043] Reference Figure 4 The spindle 120 has a connecting portion 121 at the end away from the solenoid valve 140. The connecting portion 121 has a cavity and several slits 122 on its sidewall. The connecting portion 121 is used to connect conductive components that contact the workpiece. Optionally, the connecting portion 121 has threads and at least two slits 122, dividing the connecting portion 121 into several equal parts in the circumferential direction. The connecting portion 121 also has a connecting nut 127 that screws into it. Tightening the connecting nut 127 locks the connecting portion 121 into the component contacting the workpiece. Optionally, the spindle 120 has an inlet hole 124 for connecting to a power source. The power supply wire 115 is fixed to the inlet hole 124 by bolts, which helps ensure a stable connection and avoids poor contact during high-current transmission.

[0044] Reference Figure 2 The housing 100 contains a button 112 and a circuit switch 113. The circuit switch 113 is movably connected to the housing 100 and protrudes from the housing 100. One end of the circuit switch 113 is rotatably connected to the housing 100, and the other end of the circuit switch 113 presses against the button 112. Pressing the circuit switch 113 opens and closes the circuit. Optionally, the housing 100 contains a connection terminal 114 for connecting to a power supply voltage. The connection terminal 114 is fixedly connected to the housing 100. A wire 115 is provided between the connection terminal 114 and the inlet hole 124. The wire 115 is inserted into and fixed at the inlet hole 124.

[0045] A second aspect of the present invention provides a control circuit including a power supply, an adjustment switch, and a switching switch. It includes an anode line and a cathode line. The anode line is connected to a connection terminal 114 for connecting the spindle 120 and outputting current. A resistor is installed at either point on the anode or cathode line. The adjustment switch is connected in parallel with the resistor. Opening and closing the adjustment switch changes the connection and disconnection of the resistor in the circuit, thereby changing the circuit's resistance value and thus changing the power supply's output voltage. Therefore, changing the power supply's output voltage adapts to the different voltage requirements of current-resistance welding and arc welding, achieving versatility between different processes. Optionally, the switching switch can be located on the welding torch or the welding machine. The switching switch includes a current-resistance welding mode and an arc welding mode. When the switching switch is in arc welding mode, pressing button 112 disconnects the adjustment switch. After the anode line outputs voltage for a preset time, the solenoid valve 140 is activated, causing the spindle 120 to retract a certain distance, completing the arc drawing action.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dual-purpose arc-type stud welding torch, characterized in that, include: A housing with an internal cavity, a positioning part inside the housing, and an adjustment port communicating with the cavity on the surface of the housing; A main shaft is movably connected within the housing. The main shaft has an elastic element and an adjusting element. The two ends of the elastic element abut against the positioning part and the adjusting element, respectively. The adjusting element is threadedly connected to the main shaft and protrudes from the adjusting port. The adjusting element can be adjusted in position on the main shaft and adjust the pressure between the elastic element and the positioning part. The main shaft passes through the positioning part and has a positioning surface. The positioning part has limiting elements that mate with the positioning surface. The limiting elements are located on both sides of the positioning part and have openings that mate with the positioning surface. The openings in the limiting elements on both sides of the positioning part are opposite to each other, thus limiting the rotation of the main shaft. The main shaft has an inlet hole for connecting to a power source. The housing has a connection terminal for connecting to the power source, which is fixedly connected to the housing. A wire is provided between the connection terminal and the inlet hole. A solenoid valve is connected to one end of the spindle, and the solenoid valve is used to control the axial movement of the spindle; The control circuit includes a power supply, an adjustment switch, and a switching switch. The power supply has an anode line and a cathode line. The anode line is connected to the connection terminal. A resistor is provided at either point on the anode line or the cathode line. An adjustment switch is connected in parallel with the resistor. When the adjustment switch is opened or closed, it can change the voltage value of the power supply output. The switching switch includes a current resistance welding mode and an arc welding mode. When the switching switch is in the arc welding mode, pressing the button will disconnect the adjustment switch. After the anode line outputs voltage for a preset time, the solenoid valve will start and drive the spindle to retract a certain distance to complete the arc drawing action.

2. The dual-purpose arc-type stud welding torch according to claim 1, characterized in that: The adjustment port is provided with a scale, which is used to indicate the position of the adjustment component.

3. The dual-purpose arc welding torch according to claim 1, characterized in that: The solenoid valve is equipped with a drive block, which is connected to one end of the spindle and drives the spindle to move.

4. The dual-purpose arc-type stud welding torch according to claim 1, characterized in that: The adjusting member is provided with a receiving groove, and one end of the elastic member is embedded in the receiving groove.

5. The dual-purpose arc welding torch according to claim 1, characterized in that: The housing contains a button and a circuit switch. The button is movably connected to the housing and protrudes outside the housing. The button and the circuit switch are in contact.

6. The dual-purpose arc welding torch according to claim 1, characterized in that: The housing includes a first cover and a second cover that interlock with each other, forming the cavity between the first cover and the second cover.

7. A dual-purpose arc-type stud welding torch according to claim 6, characterized in that: The housing is provided with a locking block, and the first cover and the second cover are provided with a connecting part at one end near the adjustment port. The locking block is fitted into the connecting part to connect the first cover and the second cover.

8. A dual-purpose arc-type stud welding torch according to claim 7, characterized in that: The joint is provided with a guide member to guide the movement of the main shaft, and the main shaft is inserted into the guide member.

9. A dual-purpose arc-type stud welding torch according to claim 8, characterized in that: A mounting plate is fitted onto the locking block, and a support frame is mounted on the mounting plate, extending away from the housing.

10. A dual-purpose arc-type stud welding torch according to claim 9, characterized in that: The mounting plate has a number of mounting holes, which are used to adjust the mounting position of the support frame.

11. A dual-purpose arc-type stud welding torch according to claim 7, characterized in that: One end of the spindle is provided with a connecting part, the connecting part has a cavity, and the side wall of the connecting part is provided with several gaps.

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