A pulse welding pen with adjustable welding needle pressure

Abstract

The utility model discloses a pulse welding pen with adjustable welding needle pressure, belonging to the technical field of resistance welding, comprising a welding pen rod, a welding pen sleeve is sleeved on the outer surface of the welding pen rod, a spring sleeved on the outer surface of the welding pen rod is arranged in the welding pen sleeve, a rear limit convex block is arranged on the inner wall of the welding pen sleeve, the rear end of the spring abuts against the rear limit convex block, a front limit convex block is arranged on the outer surface of the welding pen rod, and the front end of the spring abuts against the front limit convex block; an induction ring is arranged on the inner wall of the welding pen sleeve, the induction ring extends spirally along the extension direction of the welding pen sleeve, a welding switch matching the induction ring is arranged on the surface of the welding pen rod, and the welding switch is located between the induction ring and the rear limit convex block; the utility model can rotate the welding pen sleeve to adjust the welding pressure required for welding by the welding pen, so that the welding pressure is kept consistent and matches the welder and the welding workpiece, thereby improving the welding quality and welding efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse resistance welding, in particular to a pulse welding pen with adjustable welding needle pressure. Background Art

[0002] Pulse resistance welding refers to a method of using the resistance heat generated by millisecond pulse current passing through the weldment and the contact point as a heat source to locally heat the weldment to a molten or plastic state, and at the same time pressurize it for welding. The principle is: when the current passes through the welding needle (the electrode at the end of the welding pen) and the contact surface and adjacent areas of the workpiece, due to the large resistance at the contact point, a large amount of heat is generated, causing the metal to reach a molten or plastic state, and then the two metal workpieces are combined under pressure; pulse welding has the advantages of high production efficiency, small weldment deformation, and low welding cost. It is widely used in automobile manufacturing, electronics manufacturing, household appliance manufacturing, machinery manufacturing, aerospace and other fields; during the pulse welding process, a certain pressure needs to be applied to the workpiece to be welded, and the amount of pressure applied will affect the quality and effect of the welding position. However, in the process of pulse welding using a manually held welding pen or welding gun, it is difficult for the welder to ensure that the pressure applied is the same each time welding, resulting in uneven quality of the welding position on the surface of the workpiece after welding, affecting the appearance and quality of the welded workpiece.

[0003] A Chinese patent with publication number CN220904141U discloses a handheld pulse hot riveting welding machine, which consists of an external power supply box, a fixing mechanism and a handheld welding head. The external power supply box integrates a power supply device and a gas supply device for supplying power and gas to the handheld welding head; the handheld welding head is placed on the fixing mechanism, and includes a cylindrical welding head shell, a power cord passing through the welding head shell, a clamping part arranged at the bottom of the welding head shell, a support part connected to the power cord and arranged on the loading clamping part, and a heating part located at the bottom of the support part, and also includes an air pipe, which can spray air to cool the heating part; the clamping part and the support part are both composed of two parts of a positive electrode and a negative electrode with an axisymmetric shape, and a hollow space is formed between the two parts for the gas supply pipe to pass through, and the end of the gas pipe is aligned with the heating part, the other end of the power cord is connected to the power supply device of the external power supply box, and the gas pipe is connected to the gas supply device in the external power supply box.

[0004] The above-mentioned welding machine achieves welding by pulse discharging the workpiece to be welded through the heating part at the end of the handheld welding head. However, the handheld welding head needs to be manually held and operated, and pressure needs to be applied to the handheld welding head during the welding process so that the heating part has pressure applied to the surface of the workpiece to be welded. This welding method is difficult to ensure that the pressure applied is the same each time welding, and it is also impossible to adjust the pressure of the welding head on the workpiece, which can easily lead to uneven welding quality at the welding point of the workpiece after welding. Therefore, there is still room for improvement. Utility Model Content

[0005] In view of the technical defects existing in the background technology, the utility model proposes a pulse welding pen with adjustable welding needle pressure, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0006] A pulse welding pen with adjustable welding needle pressure, comprising a welding pen rod, a welding pen sleeve sleeved on the outer surface of the welding pen rod, a spring sleeved on the outer surface of the welding pen rod, a rear limit convex block on the inner wall of the welding pen sleeve, a rear end of the spring abutting against the rear limit convex block, a front limit convex block on the outer surface of the welding pen rod, and a front end of the spring abutting against the front limit convex block;

[0007] An induction ring is provided on the inner wall of the welding pen sleeve, and the induction ring extends spirally along the extension direction of the welding pen sleeve. A welding switch matching the induction ring is provided on the surface of the welding pen rod, and the welding switch is located between the induction ring and the rear limit protrusion.

[0008] As a further technical solution of the utility model, the induction ring is a groove sunken into the inner wall of the welding pen sleeve, and the surface of the welding switch is provided with a touch button switch matching the groove. The top of the touch button switch is elastically abutted against the inner wall of the welding pen sleeve inside the welding switch.

[0009] As a further technical solution of the utility model, a pressure scale is provided on the front end edge of the welding pen sleeve, and the pressure scale is evenly surrounded by the front end edge of the welding pen sleeve. The outer surface of the welding pen rod is provided with a scale mark matching the pressure scale.

[0010] As a further technical solution of the utility model, the front end of the welding pen rod passes through the welding pen sleeve and extends forward, and the front end of the welding pen rod is provided with an electrode fixing hole.

[0011] As a further technical solution of the utility model, the rear end of the welding pen rod passes through the welding pen sleeve and extends backward, the rear end of the welding pen rod is provided with an electrical interface, and the outer surface of the welding pen rod is provided with a circuit groove extending from the electrical interface to the welding switch.

[0012] As a further technical solution of the utility model, a limiting ring is provided at the front end of the outer surface of the soldering pen sleeve, and a mounting thread is provided on the outer surface of the soldering pen sleeve.

[0013] As a further technical solution of the utility model, the outer surface of the soldering pen sleeve is sleeved with an insulating sleeve whose front end abuts against a limiting ring, and the inner wall of the insulating sleeve is provided with an internal thread matching the installation thread.

[0014] The beneficial effects of the utility model are:

[0015] The welding pen of the utility model utilizes the pulse welding principle to perform pulse welding on the workpiece to be welded, applies downward pressure to the welding pen sleeve to make it move relative to the welding pen rod and squeeze the spring, and when the induction ring on the inner wall of the welding pen sleeve moves to the position of the light touch key switch, the welding switch is triggered to connect the current to perform millisecond-level pulse discharge welding, and finally the spring resets the welding pen sleeve and disconnects the current to complete the welding, and the downward pressure applied to the welding pen sleeve for each welding of the workpiece is kept consistent, so that the welding effect of the workpiece can be made more uniform; in addition, because the induction ring spirally extends along the extension direction of the welding pen sleeve, the welding pen sleeve can be rotated to change the vertical distance between the welding switch and the induction ring, thereby adjusting the welding pressure required to trigger the welding switch, so that the welding pressure matches the welder and the welding workpiece, and the welding quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of a pulse welding pen with adjustable welding needle pressure.

[0017] Figure 2 yes Figure 1 Partial schematic diagram at point A in the middle.

[0018] Figure 3 The invention discloses a structural schematic diagram of a welding pen sleeve of a pulse welding pen with adjustable welding needle pressure.

[0019] Figure 4 The diagram is a schematic diagram of the welding state of a pulse welding pen with adjustable welding needle pressure.

[0020] Figure 5 yes Figure 4 Partial schematic diagram of point B in the middle.

[0021] Among them: welding pen rod 1, front limit protrusion 11, welding switch 12, touch button switch 121, scale mark 13, electrode fixing hole 14, electrical interface 15, line groove 16, welding pen sleeve 2, rear limit protrusion 21, induction ring 22, pressure scale 23, limit ring 24, installation thread 25, spring 3, insulating sleeve 4, internal thread 41. DETAILED DESCRIPTION

[0022] The implementation methods of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation methods of the present invention are not limited to the following embodiments, and the present invention involves relevant necessary components in this technical field, which should be regarded as common knowledge in this technical field and can be known and mastered by technical personnel in this technical field.

[0023] like Figure 1-5As shown, a pulse welding pen with adjustable welding needle pressure includes a welding pen rod 1, and it is defined that one end of the welding pen rod 1 for installing an electrode is the front end, and the other end is the rear end. The outer surface of the welding pen rod 1 is sleeved with a welding pen sleeve 2, and the welding pen sleeve 2 is provided with a spring 3 sleeved on the outer surface of the welding pen rod 1. The inner wall of the welding pen sleeve 2 is provided with a rear limit protrusion 21, and the rear end of the spring 3 abuts against the rear limit protrusion 21. The outer surface of the welding pen rod 1 is provided with a front limit protrusion 11, and the front end of the spring 3 abuts against the front limit protrusion 11; the inner wall of the welding pen sleeve 2 is provided with an induction ring 22, and the induction ring 22 extends spirally along the extension direction of the welding pen sleeve 2, and the surface of the welding pen rod 1 is provided with a welding switch 12 matching the induction ring 22, and the welding switch 12 is located between the induction ring 22 and the rear limit protrusion 21.

[0024] The welding pen of the utility model is used to be connected with the pulse welding equipment and to weld the workpiece to be welded according to the pulse welding principle. The welding pen is mainly welded by hand. Before welding, the insulating sleeve 4 on the surface of the welding pen sleeve 2 is held, and then the electrode at the front end of the welding pen rod 1 is downwardly abutted against the position where the workpiece to be welded needs to be welded. Then, pressure is applied to press the welding pen downward. During the downward pressing process, the welding pen sleeve 2 squeezes the rear end of the spring 3 through the rear limit protrusion 21 of the inner wall. The spring 3 is preferably a compression spring. Since the front end of the spring 3 is abutted against the front limit protrusion 11 on the outer surface of the welding pen rod 1, the rear end of the spring 3 will be compressed and store elastic potential energy after being squeezed. At the same time, the welding pen sleeve 2 moves forward relative to the welding pen rod 1, and the induction ring 22 inside it also moves forward toward the welding switch 12. When the induction ring 22 moves to the welding switch 12, the welding pen is in a welding state, and the welding switch 12 allows current to pass through. The current eventually flows to the electrode and generates a strong thermal energy pulse, thereby heating the workpiece to be welded to melt. The downward pressure applied to the welding pen is transmitted to the electrode to make the workpieces to be welded fuse with each other, and then the force applied to the welding pen is withdrawn, and the spring 3 releases the elastic potential energy to reset the welding pen rod 1, close the welding switch 12 and disconnect the current, and then the workpiece is cooled by external airflow or other means to complete the welding.

[0025] It should be noted that a sensing element such as an optical sensor or a pressure sensor can be set inside the welding switch 12, and the sensing ring 22 is an optical mark or a physical structure such as a groove or a bump. When the welding switch 12 moves to the position of the sensing ring 22, the sensing element inside the welding switch 12 will sense the optical mark or the sensing probe connected to the sensing element will contact the sensing ring 22 to produce a pressure change. At this time, the sensing element will generate an electrical signal and transmit it to the control system inside the welding switch 12. The control system controls the welding switch 12 to turn on or off the current, thereby realizing the control of the welding operation of the welding pen.

[0026] The induction ring 22 of the utility model spirally extends along the extension direction of the welding pen sleeve 2. Therefore, the vertical distance between each position of the induction ring 22 and the rear end edge of the welding pen sleeve 2 in the extension direction is different. Then the vertical distance from the welding switch 12 to the induction ring 22 will change as the welding pen sleeve 2 rotates along its own axis. Therefore, the vertical distance between the welding switch 12 and the induction ring 22 can be adjusted by rotating the welding pen sleeve 2, thereby controlling the movement distance of the welding pen sleeve 2 required to trigger the welding switch 12. In addition, during the squeezing of the spring 3, the greater the squeezing distance, the higher the pressure required. Therefore, the welding switch 12 can be adjusted by rotating the welding pen sleeve 2. The vertical distance between 12 and the induction ring 22 can also control the pressure that the welding operator needs to apply to the welding pen to trigger the welding switch 12; since the strength of each welding operator is different, the operator can adjust the pressure of the trigger welding switch 12 by rotating the welding pen sleeve 2, so that the pressure remains constant and best matches his own operating habits, thereby improving the welding efficiency. At the same time, some workpieces to be welded with different thicknesses need to be welded with different welding pressures. By rotating the welding pen sleeve 2 to adjust the pressure of the trigger welding switch 12, the welding pressure can also be adjusted to the optimal value and the welding pressure can be kept the same during each welding, thereby improving the welding quality.

[0027] The welding pen of the utility model utilizes the pulse welding principle to weld the workpiece to be welded, and applies downward pressure to the welding pen sleeve 2 to make it move relative to the welding pen rod 1 and squeeze the spring 3, and when the induction ring 22 on the inner wall of the welding pen sleeve 2 moves to the position of the welding switch 12, the welding switch 12 is triggered to connect the current for welding, and finally the spring 3 resets the welding pen sleeve 2 and disconnects the current to complete the welding, and the downward pressure applied to the welding pen sleeve 2 for each welding of the workpiece is kept consistent, so that the welding effect of the workpiece can be made more uniform; in addition, since the induction ring 22 spirally extends along the extension direction of the welding pen sleeve 2, the welding pen sleeve 2 can be rotated to change the vertical distance between the welding switch 12 and the induction ring 22, thereby adjusting the welding pressure required to trigger the welding switch 12, so that the welding pressure matches the welder and the welding workpiece, and the welding quality is improved.

[0028] like Figure 3 As shown, as one of the preferred embodiments of the utility model, the induction ring 22 is a groove sunken into the inner wall of the welding pen sleeve 2, and the surface of the welding switch 12 is provided with a touch button switch 121 matching the groove. The top of the touch button switch 121 is elastically abutted against the inner wall of the welding pen sleeve 2 inside the welding switch 12.

[0029] The welding switch 12 of the utility model is provided with an elastic structure and a pressure sensor that match the touch button switch 121. The touch button switch 121 will be squeezed into the welding switch 12 after being subjected to external pressure. When the welding pen is in a reset state, the top of the touch button switch 121 abuts against the inside of the welding pen sleeve 2 and is squeezed into the welding switch 12. When the welder applies pressure to make the welding pen sleeve 2 move downward until the induction ring 22 matches the touch button switch 121, the elastic structure makes the top of the touch button switch 121 move into the induction ring 22, and the pressure sensor senses the pressure change and generates an electrical signal to turn on the welding switch 12. The current flows through the welding switch to the electrode at the front end of the welding pen rod 1 to weld the workpieces. After the workpieces are fused to each other, the pressure on the welding pen sleeve 2 is removed to make it move upward. The button switch 121 will definitely leave the induction ring 22 and be squeezed into the welding switch 12 by the inner wall of the welding pen sleeve 2. The welding switch 12 will disconnect the current and stop welding. The utility model applies downward pressure to the welding pen sleeve 2 to make it move downward and triggers the welding switch 12 to weld. Each time the welding switch 12 is triggered, the distance moved by the welding pen sleeve 2 is the same, so that the pressure applied during each welding can be kept consistent, thereby improving welding efficiency and welding quality.

[0030] like Figure 1 , 3 As shown, as one of the preferred embodiments of the utility model, a pressure scale 23 is provided on the front edge of the welding pen sleeve 2, and the pressure scale 23 is evenly surrounded by the front edge of the welding pen sleeve 2, and a scale mark 13 matching the pressure scale 23 is provided on the outer surface of the welding pen rod 1.

[0031] The inner wall of the welding pen sleeve 2 and the outer surface of the welding pen rod 1 of the utility model are both cylindrical, and the pressure scale 23 is distributed in a circular shape at the front end edge of the welding pen sleeve 2 and forms a plurality of scales, and each scale is marked with a mark indicating the pressure size according to the vertical distance between it and the induction ring 22. The farther the vertical distance between the scale and the induction ring 22 is, the smaller the marked pressure is, and vice versa. This is because the induction ring 22 spirally extends along the extension direction of the welding pen sleeve 2. The farther the vertical distance between the scale and the induction ring 22 is, the greater the vertical distance between the welding switch 12 and the induction ring 22 is. The closer the welding pressure is, the smaller the pressure required to trigger the welding switch 12 through the induction ring 22. In addition, the scale mark 13 and the welding switch 12 are arranged on the same busbar, and the scale mark 13 is located at the position where the welding pen rod 1 and the front end of the welding pen sleeve 2 intersect. Therefore, the relative position of the welding switch 12 and the induction ring 22 can be judged by the scale mark 13 and the pressure scale 23, and the welding pressure of the welding pen during welding can be known. Each time the welder uses the welding pen, the welding pen sleeve 2 can be rotated and the welding pressure can be quickly adjusted according to the scale mark 13 and the pressure scale 23 to increase the welding efficiency.

[0032] like Figure 1As shown, as one of the preferred embodiments of the utility model, the front end of the welding pen rod 1 passes through the welding pen sleeve 2 and extends forward, and the front end of the welding pen rod 1 is provided with an electrode fixing hole 14.

[0033] The electrode fixing hole 14 of the utility model is used to fix the electrode that is in direct contact with the workpiece during welding. The electrode is usually made of metal with good current conductivity, thermal conductivity, hardness, high temperature resistance, toughness and other properties. The cost of the electrode is relatively high, while the structures such as the welding pen rod 1 and the welding pen sleeve 2 in the welding pen do not require high performance and have a relatively low cost. Therefore, fixing the electrode through the electrode fixing hole 14 can ensure normal welding while reducing the cost of the welding pen.

[0034] like Figure 1 As shown, as one of the preferred embodiments of the utility model, the rear end of the welding pen rod 1 passes through the welding pen sleeve 2 and extends backward, the rear end of the welding pen rod 1 is provided with an electrical interface 15, and the outer surface of the welding pen rod 1 is provided with a circuit groove 16 extending from the electrical interface 15 to the welding switch 12.

[0035] The electrical interface 15 of the utility model is used to connect with the power transmission line of the output current in the pulse welding machine. The electrical interface 15 can be fixed to the fixed port of the power transmission line by means of an internally arranged thread. The power transmission line is buried in the line groove 16 and extends to be connected with the welding switch 12. The power transmission line is fixed by the insulating sleeve 4 on the surface of the welding pen rod 1. Accommodating the power transmission line by the line groove 16 can ensure that the power transmission line will not be squeezed by the insulating sleeve 4 and keep the surface of the insulating sleeve 4 flat.

[0036] like Figure 1 , 3 As shown, as one of the preferred embodiments of the utility model, a limiting ring 24 is provided at the front end of the outer surface of the soldering pen sleeve 2, and a mounting thread 25 is provided on the outer surface of the soldering pen sleeve 2; an insulating sleeve 4 is sleeved on the outer surface of the soldering pen sleeve 2, whose front end abuts against the limiting ring 24, and an inner wall of the insulating sleeve 4 is provided with an internal thread 41 matching the mounting thread 25.

[0037] The mounting thread 25 on the surface of the welding pen sleeve 2 of the utility model is used to fix the structure of the welding pen shell such as the insulating sleeve 4. The insulating sleeve 4 is rotatably fixed to the outer surface of the welding pen sleeve 2 by the internal thread 41 matching the mounting thread 25, and the front end of the insulating sleeve 4 abuts against the limiting ring 24. The welder holds the outer surface of the insulating sleeve 4 to operate the welding pen. Since the welding pen sleeve 2 can move downward by applying downward pressure to the insulating sleeve 4 during welding, the limiting ring 24 can make the pressure act on the welding pen sleeve 2 better.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pulse welding pen with adjustable welding needle pressure, comprising a welding pen rod (1), characterized in that: The outer surface of the soldering pen rod (1) is sleeved with a soldering pen sleeve (2), the soldering pen sleeve (2) is provided with a spring (3) sleeved on the outer surface of the soldering pen rod (1), the inner wall of the soldering pen sleeve (2) is provided with a rear limit protrusion (21), the rear end of the spring (3) abuts against the rear limit protrusion (21), the outer surface of the soldering pen rod (1) is provided with a front limit protrusion (11), the front end of the spring (3) abuts against the front limit protrusion (11); An induction ring (22) is provided on the inner wall of the soldering pen sleeve (2), the induction ring (22) spirally extending along the extension direction of the soldering pen sleeve (2), a soldering switch (12) matching the induction ring (22) is provided on the surface of the soldering pen rod (1), and the soldering switch (12) is located between the induction ring (22) and the rear limit protrusion (21).

2. The pulse welding pen with adjustable welding needle pressure according to claim 1, characterized in that: The induction ring (22) is a groove sunken into the inner wall of the soldering pen sleeve (2); a touch key switch (121) matching the groove is provided on the surface of the soldering switch (12); and the top of the touch key switch (121) is in contact with the inner wall of the soldering pen sleeve (2) through elasticity inside the soldering switch (12).

3. The pulse welding pen with adjustable welding needle pressure according to claim 1, characterized in that: A pressure scale (23) is provided on the front edge of the soldering pen sleeve (2), and the pressure scale (23) is evenly surrounded by the front edge of the soldering pen sleeve (2). A scale mark (13) matching the pressure scale (23) is provided on the outer surface of the soldering pen rod (1).

4. The pulse welding pen with adjustable welding needle pressure according to claim 1, characterized in that: The front end of the welding pen rod (1) passes through the welding pen sleeve (2) and extends forwards, and the front end of the welding pen rod (1) is provided with an electrode fixing hole (14).

5. The pulse welding pen with adjustable welding needle pressure according to claim 1, characterized in that: The rear end of the soldering pen rod (1) passes through the soldering pen sleeve (2) and extends backwards, the rear end of the soldering pen rod (1) is provided with an electrical interface (15), and the outer surface of the soldering pen rod (1) is provided with a line groove (16) extending from the electrical interface (15) to the soldering switch (12).

6. The pulse welding pen with adjustable welding needle pressure according to claim 1, characterized in that: A limiting ring (24) is provided at the front end of the outer surface of the soldering pen sleeve (2), and a mounting thread (25) is provided on the outer surface of the soldering pen sleeve (2).

7. The pulse welding pen with adjustable welding needle pressure according to claim 6, characterized in that: The outer surface of the soldering pen sleeve (2) is sleeved with an insulating sleeve (4) whose front end abuts against a limiting ring (24), and the inner wall of the insulating sleeve (4) is provided with an internal thread (41) matching the mounting thread (25).

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