Efficient cooling water channel connecting and detecting mechanism for electric resistance welding pliers

Abstract

The utility model provides an efficient cooling water channel connecting and detecting mechanism for resistance welding pliers, which comprises a welding pliers body, a welding transformer and a conductive part, the welding pliers body internally comprises a movable side electrode and a static side electrode, the welding pliers body is externally connected with an efficient cooling water channel connecting structure and a detecting structure, and the efficient cooling water channel connecting structure comprises a water valve plate assembly. The water valve body assembly comprises a first water valve plate used for cooling a movable side electrode and a static side electrode of a welding clamp, a conductive part and a second water valve plate used for independently cooling a welding transformer, and the total water inlet mode of the efficient cooling water way connecting structure and external connection is two-in and two-out. The cooling priority of the parts of the electrode holder is adjusted by optimizing the water path of the electrode holder, the water passing pipe diameter in the electrode holder is increased, and the cooling effect of the parts of the electrode holder is improved. Meanwhile, a water flow detection module is additionally arranged at the water return position of the electrode holder, the electrode holder is monitored in real time by detecting the cooling water return flow and the water temperature, and faults caused by too high heat productivity of the electrode holder are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a high-efficiency cooling water channel connection and detection mechanism for resistance welding tongs. Background Art

[0002] Resistance welding clamps generate a lot of heat when working. This is mainly because the high current in the welding process generates resistance heat through the workpiece and the electrode, causing the temperature to rise. In order to maintain the normal operation of the equipment and ensure the welding quality, the resistance welding clamp must be effectively cooled. The cooling water system is an indispensable part of the resistance welding clamp. It can effectively take away the heat generated during the welding process, prevent the equipment from overheating, and also ensure the safety and stability of the welding operation.

[0003] With the continuous development of lightweight applications in automobiles, aluminum alloy welding is increasingly used in automobile manufacturing. With the improvement of welding technology, the increase in welding cycle and the thickening of plate combinations, the requirements for welding quality are becoming higher and higher, which brings great challenges to the use of welding tongs. When welding tongs are in the state of high current and high cycle, a series of problems often occur, such as electrode adhesion, shortened life of wearing parts, and damage to welding tongs transformer due to poor cooling. Traditional cooling methods for resistance welding tongs are often difficult to meet existing welding needs.

[0004] The prior art discloses a welding clamp cooling water treatment device with application number: CN201520175510.2, comprising a device body installed in a circulating cooling water circuit of the welding clamp, the circulating cooling water circuit of the welding clamp comprising an inlet circuit and a return circuit connected to the welding clamp, the device body comprising an inlet pipe and a return pipe respectively connected in series in the inlet circuit and the return circuit, the inlet pipe and the return pipe are both provided with a control valve, and a pumping device is provided on the side of the control valve close to the welding clamp connected to the return pipe. When the welding clamp needs to remove the electrode cap, the two control valves are closed first, so that the inlet circuit and the return circuit of the welding clamp are both closed; at the same time, the pumping device starts to pump water, so that the water in the welding clamp has a tendency to flow into the pumping device; at this time, the electrode cap is removed again, and the water in the welding clamp will not be ejected. In this way, the utility model avoids the residual water spraying when the welding gun is replaced, and the residual water treatment is realized quickly and effectively, while not affecting the production rhythm, the residual water treatment time is short, the effect is good, and it will not cause damage to the factory water circulation system.

[0005] This device still cannot solve the problems of electrode adhesion, shortened life of wearing parts, and damage to the welding clamp transformer due to poor cooling caused by welding under the conditions of high welding current and high cycle time. Therefore, we have made improvements and proposed an efficient cooling water circuit connection and detection mechanism for resistance welding clamps. Summary of the invention

[0006] The utility model aims to solve the problems of electrode adhesion, shortened life of wearing parts, and damage of welding clamp transformer due to poor cooling caused by welding under the condition of high welding current and high beat rate, which are caused by the current cooling welding design.

[0007] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0008] The resistance welding tongs have efficient cooling water connection and detection mechanism to improve the above problems.

[0009] The specific application is as follows:

[0010] A resistance welding clamp high-efficiency cooling water circuit connection and detection mechanism comprises a welding clamp body, a welding transformer and a conductive part. The welding clamp body comprises a moving side electrode and a stationary side electrode. The welding clamp body is externally connected with a high-efficiency cooling water circuit connection structure and a detection structure. The high-efficiency cooling water circuit connection structure comprises a water valve plate assembly. The water valve body assembly comprises a water valve plate 1 for cooling the moving side electrode, the stationary side electrode and the conductive part of the welding clamp and a water valve plate 2 for cooling the welding transformer alone. The total water inlet mode of the high-efficiency cooling water circuit connection structure and the external connection is two-in-two-out.

[0011] As a preferred technical solution of the present application, the water valve plate 1 is externally connected with one input and one output, the inlet end of the water valve plate 1 is connected with a pagoda joint 1, the outlet section of the water valve plate 1 is connected with a pagoda joint 2, the interior of the water valve plate 1 is divided into a moving electrode side 1 and a stationary electrode side 1, and the outer ends of the moving electrode side 1 and the stationary electrode side 1 are connected with conductive components.

[0012] As a preferred technical solution of the present application, the moving electrode side 1 includes quick-plug connector 1 and quick-plug connector 2, the outer end of the quick-plug connector 1 is sequentially connected to the moving electrode arm, the moving electrode rod and the electrode cap 1, and the outer end of the quick-plug connector 2 is sequentially connected to the positive conductive block and the moving arm conductive block.

[0013] As the preferred technical solution of the present application, the static electrode side one includes quick-plug connector three and quick-plug connector four, the outer end of quick-plug connector three is connected to the static electrode arm, the static electrode rod and the electrode cap two in sequence, the outer end of quick-plug connector four is connected to the negative conductive block and the static arm conductive block in sequence, and quick-plug connector two and quick-plug connector four are both connected to the pagoda connector two.

[0014] As the preferred technical solution of the present application, the water valve plate 2 is set to have one input and one output for external connection, the inlet of the water valve plate 2 is provided with a pagoda joint 3, the outlet of the water valve plate 2 is provided with a pagoda joint 4, the pagoda joint 3 is respectively connected to the quick-connect joint 5 and the quick-connect joint 6 through the water valve plate 2, the pagoda joint 4 is respectively connected to the quick-connect joint 7 and the quick-connect joint 8 through the water valve plate 2, the quick-connect joint 5 and the quick-connect joint 6 are respectively connected to the cooling circulation inlet of the welding transformer, and the quick-connect joint 7 and the quick-connect joint 8 are respectively interconnected with the cooling circulation outlet of the welding transformer.

[0015] As a preferred technical solution of the present application, it also includes a detection mechanism for real-time monitoring of the cooling water circuit of the welding clamp, the detection mechanism includes a cooling water monitor located at the outer ends of water valve plate 1 and water valve plate 2, and the outer end signal of the cooling water monitor is connected to the PLC.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the scheme of this application:

[0018] 1. Two sets of water valve plates are connected to the inside of the welding clamp and the welding transformer through the outlet respectively, and circulation is generated between the quick-plug connector and the pagoda connector to speed up the cooling of the welding. Since the front electrode and the welding transformer generate a large amount of heat when the welding clamp is welding, they are cooled first and separately, thereby improving the cooling efficiency of the components and reducing their failure rate;

[0019] While improving the cooling effect, the cross-section of the cooling pipeline inside the welding clamp is appropriately increased to increase the water flow resistance and ensure the water flow, which improves the cooling effect of the welding clamp and improves the welding quality and efficiency;

[0020] 2. Add a water flow detection module at the return water of the welding clamp. By detecting the cooling return water flow and water temperature, the welding clamp can be monitored in real time, and problems can be discovered and solved in time. Through the water flow monitor and temperature sensor, the system has high reliability and easy operation, and reduces the failure of the welding clamp caused by excessive heat generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the efficient cooling water connection of the resistance welding tongs and the overall cooling water connection of the detection mechanism provided in this application;

[0022] Figure 2 This is a detection schematic diagram of the efficient cooling water circuit connection and detection mechanism of the resistance welding clamp provided in this application.

[0023] Indicated in the figure:

[0024] 1. Electrode cap 1; 2. Electrode cap 2; 3. Stationary electrode rod; 4. Stationary electrode arm; 5. Stationary arm conductive block; 6. Moving electrode rod; 7. Moving electrode arm; 8. Moving arm conductive block; 9. Positive conductive block; 10. Negative conductive block; 11. Welding transformer;

[0025] 12. Water valve plate 1; 13. Water valve plate 2; 20. Pagoda connector 1; 21. Pagoda connector 2; 22. Quick-connect connector 3; 23. Quick-connect connector 1; 24. Quick-connect connector 2; 25. Quick-connect connector 4; 26. Pagoda connector 3; 27. Pagoda connector 4; 28. Quick-connect connector 8; 29. ​​Quick-connect connector 7;

[0026] 30. Quick-connect connector five; 31. Quick-connect connector six

[0027] 99. Cooling water monitor. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but only represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] like Figure 1 As shown, this embodiment proposes an efficient cooling water circuit connection and detection mechanism for resistance welding tongs, including a welding tongs body, a welding transformer 11 and a conductive part. The interior of the welding tongs body includes a moving side electrode and a stationary side electrode. The welding tongs body is externally connected with a high-efficiency cooling water circuit connection structure and a detection structure. The high-efficiency cooling water circuit connection structure includes a water valve plate assembly. The water valve body assembly includes a water valve plate 12 for cooling the moving side electrode, the stationary side electrode and the conductive part of the welding tongs and a water valve plate 2 13 for separately cooling the welding transformer 11. The total water inlet mode of the high-efficiency cooling water circuit connection structure and the external connection is two-in and two-out.

[0032] The water valve plate 12 is connected to the outside with one input and one output. The inlet end of the water valve plate 12 is connected to a pagoda connector 20, and the outlet section of the water valve plate 12 is connected to a pagoda connector 21. The interior of the water valve plate 12 is divided into a moving electrode side 1 and a stationary electrode side 1. The outer ends of the moving electrode side 1 and the stationary electrode side 1 are connected to conductive components.

[0033] The moving electrode side includes a quick-plug connector 23 and a quick-plug connector 24. The outer end of the quick-plug connector 23 is connected to the moving electrode arm 7, the moving electrode rod 6 and the electrode cap 1 in sequence, and the outer end of the quick-plug connector 24 is connected to the positive conductive block 9 and the moving arm conductive block 8 in sequence.

[0034] The static electrode side 1 includes a quick-plug connector 3 22 and a quick-plug connector 4 25. The outer end of the quick-plug connector 3 22 is connected to the static electrode arm 4, the static electrode rod 3 and the electrode cap 2 2 in sequence. The outer end of the quick-plug connector 4 25 is connected to the negative conductive block 10 and the static arm conductive block 5 in sequence. The quick-plug connector 2 24 and the quick-plug connector 4 25 are both connected to the pagoda connector 2 21.

[0035] The cooling water enters the water valve plate 12 from the pagoda connector 20 and is divided into two paths to provide cooling for the moving and static electrode sides and the conductive parts. One path of cooling water is connected to the moving electrode arm 7, the moving electrode rod 6, and then to the electrode cap 1 through the quick-plug connector 1 23. After cooling the parts, the moving arm conductive block 8 and the positive conductive block 9 are cooled. After passing through the quick-plug connector 2 24, it flows back to the water valve plate 12 and flows out of the welding clamp through the pagoda connector 2 21; the other path of cooling water is connected to the static electrode arm 4, the static electrode rod 3, and then to the electrode cap 2 2 through the quick-plug connector 3 22. After cooling the parts, the static arm conductive block 5 and the negative conductive block 10 are cooled. After passing through the quick-plug connector 4 25, it flows back to the water valve plate 12 and flows out of the pagoda connector 2 21;

[0036] The water valve plate 2 13 is connected to the outside with one input and one output. The inlet of the water valve plate 2 13 is provided with a pagoda joint 3 26, and the outlet of the water valve plate 2 13 is provided with a pagoda joint 4 27. The pagoda joint 3 26 is respectively connected to the quick-connect joint 5 30 and the quick-connect joint 6 31 through the water valve plate 2 13, and the pagoda joint 4 27 is respectively connected to the quick-connect joint 7 29 and the quick-connect joint 8 28 through the water valve plate 2 13. The quick-connect joint 5 30 and the quick-connect joint 6 31 are respectively connected to the cooling circulation inlet of the welding transformer 11, and the quick-connect joint 7 29 and the quick-connect joint 8 28 are respectively connected to the cooling circulation outlet of the welding transformer 11.

[0037] The cooling water flows from the pagoda joint 3 26 to the inside of the water valve plate 2 13 and then is divided into two paths, cooling the two circuits inside the welding transformer 11 respectively. The cooling water flows into the welding transformer 11 from the quick-plug joint 5 30 and the quick-plug joint 6 31 respectively, and flows through the cooling cycle inside the welding transformer 11 to the quick-plug joint 7 29 and the quick-plug joint 8 28, and then returns to the water valve plate 2 13 and flows out from the pagoda joint 4 27. Since the front electrode and the welding transformer 11 generate a large amount of heat when the welding clamp is welding, they need to be cooled preferentially and separately, so as to improve the cooling efficiency of the components and reduce their failure rate. In order to improve the cooling effect, it is necessary to appropriately increase the cross-section of the cooling pipeline inside the welding clamp to increase the water flow resistance and ensure the water flow.

[0038] like Figure 2As shown, as a preferred embodiment, on the basis of the above-mentioned method, it further includes a detection mechanism for real-time monitoring of the cooling water circuit of the welding clamp, the detection mechanism includes a cooling water monitor 99 located at the outer ends of water valve plate 12 and water valve plate 2 13, and the outer end signal of the cooling water monitor 99 is connected to the PLC.

[0039] First, the cooling water monitor 99 is installed at the total water outlet position of the water valve plate 1 12 and the water valve plate 2 13;

[0040] Secondly, the cooling water monitor 99 is used to monitor the return water flow and return water temperature of the welding clamp;

[0041] Furthermore, when the water flow is too low or the water temperature is too high, an alarm signal will be sent to the PLC.

[0042] Its working principle is:

[0043] The electromagnetic coil generates a magnetic field, and the two metal probes can pick up voltage. If there is no cooling water flowing, the two metal probes cannot measure the induced voltage. Once the cooling water starts to flow, the magnetic field will exert force on the charged particles, and an induced voltage will be generated between the two metal probes. The voltage is proportional to the cooling water flow rate, and the flow rate can be calculated together with the known cross-sectional area of ​​the pipe. Since the metal probes will also detect other interference voltages, they need to be separated from the actual measured signal. The magnetic field generated by the pulsed direct current will be alternately reversed, and the polarity of the voltage picked up on the metal probes will continue to change. These signals are amplified by the signal amplifier, and then the useless signals are removed by the signal filter to eliminate all constant interference and obtain useful signals. The effective analog model is converted into a digital signal through the signal processor, and the actual water flow is obtained by calculation and processing. In addition, a temperature sensor is set in the flow detector, and the resistance value of the temperature sensor is detected and converted into the corresponding temperature.

[0044] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A resistance welding clamp high-efficiency cooling water circuit connection and detection mechanism, comprising a welding clamp body, a welding transformer (11) and a conductive part, characterized in that: The welding clamp body includes a moving side electrode and a stationary side electrode, and the welding clamp body is externally connected to a high-efficiency cooling water circuit connection structure and a detection structure, and the high-efficiency cooling water circuit connection structure includes a water valve plate assembly, and the water valve plate assembly includes a water valve plate 1 (12) for cooling the moving side electrode, the stationary side electrode and the conductive part of the welding clamp and a water valve plate 2 (13) for cooling the welding transformer (11) alone, and the high-efficiency cooling water circuit connection structure is connected to the outside in a total water inlet mode of two inlets and two outlets; The water valve plate 1 (12) is connected to the outside with one input and one output, the inlet end of the water valve plate 1 (12) is connected with a pagoda connector 1 (20), the outlet end of the water valve plate 1 (12) is connected with a pagoda connector 2 (21), the interior of the water valve plate 1 (12) is divided into a moving electrode side 1 and a stationary electrode side 1, and the outer ends of the moving electrode side 1 and the stationary electrode side 1 are connected to a conductive component; The moving electrode side 1 comprises a quick-insert connector 1 (23) and a quick-insert connector 2 (24), the outer end of the quick-insert connector 1 (23) being connected in sequence to a moving electrode arm (7), a moving electrode rod (6) and an electrode cap 1 (1), and the outer end of the quick-insert connector 2 (24) being connected in sequence to a positive electrode conductive block (9) and a moving arm conductive block (8); The static electrode side 1 comprises a quick-plug connector 3 (22) and a quick-plug connector 4 (25), the outer end of the quick-plug connector 3 (22) is connected to the static electrode arm (4), the static electrode rod (3) and the electrode cap 2 (2) in sequence, the outer end of the quick-plug connector 4 (25) is connected to the negative electrode conductive block (10) and the static arm conductive block (5) in sequence, and the quick-plug connector 2 (24) and the quick-plug connector 4 (25) are both connected to the pagoda connector 2 (21); The water valve plate 2 (13) is connected to the outside with one input and one output. The inlet of the water valve plate 2 (13) is provided with a pagoda connector 3 (26), and the outlet of the water valve plate 2 (13) is provided with a pagoda connector 4 (27). The pagoda connector 3 (26) is connected to a quick-connect connector 5 (30) and a quick-connect connector 6 (31) through the water valve plate 2 (13), respectively. The pagoda connector 4 (27) is connected to a quick-connect connector 7 (29) and a quick-connect connector 8 (28) through the water valve plate 2 (13), respectively. The quick-connect connector 5 (30) and the quick-connect connector 6 (31) are respectively connected to the cooling circulation inlet of the welding transformer (11), and the quick-connect connector 7 (29) and the quick-connect connector 8 (28) are respectively connected to the cooling circulation outlet of the welding transformer (11).

2. A resistance welding clamp efficient cooling water channel connection and detection mechanism according to claim 1, characterized in that: It also includes a detection mechanism for real-time monitoring of the cooling water circuit of the welding clamp, the detection mechanism including a cooling water monitor (99) located at the outer ends of the water valve plate 1 (12) and the water valve plate 2 (13), the outer end signal of the cooling water monitor (99) being connected to a PLC.

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