Diaphragm box welding device of thermostatic expansion valve
By designing a rectangular heat dissipation groove and three-claw automatic centering device on the left and right press heads in the thermal expansion valve diaphragm box welding device, the problems of unstable and overfired diaphragm box welding in the prior art are solved, and high-quality and consistent welding effects are achieved.
Patent Information
- Application Number
- CN202420012769.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-01-03
AI Technical Summary
The existing thermal expansion valve diaphragm box welding device cannot effectively protect the diaphragm box, which causes the diaphragm box to be easily burned after welding, and the welding strength is not high, resulting in unstable welding quality.
A diaphragm box welding device including a left press head, a right press head, a welding gun and a three-claw automatic centering device is designed. Rectangular heat dissipation grooves are distributed on the left and right presses. The material is pure copper, which can quickly dissipate heat generated by welding; the three-claw automatic centering device automatically locates the membrane box to reduce jumping and improve welding consistency.
By forming a protective cavity and rapid heat dissipation, the membrane box can be effectively prevented from overburning, and the welding quality and consistency are improved, and the problems of low welding strength and unstable quality are solved.
Smart Images
Figure CN222569655U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a diaphragm box welding device for a thermal expansion valve, belongs to the technical field of throttling of thermal expansion valves in a vapor compression refrigeration system, and is suitable for welding diaphragms of various thermal expansion valves. Background Art
[0002] As a key component in the automotive air-conditioning system, the thermal expansion valve plays the role of throttling and reducing pressure, regulating flow, and maintaining appropriate superheat. The quality of its performance directly affects the performance of the air-conditioning system. As the core component of the thermal expansion valve, the diaphragm box is the direct power source for the operation of the thermal expansion valve. The quality of its performance directly affects the performance of the thermal expansion valve and the performance of the automotive air-conditioning system. The refrigerant filled in the diaphragm box is the source of power for the diaphragm box. Since the diaphragm box is mainly welded by the upper and lower covers, if there are defects in the welding, the filled refrigerant will leak. When there is no refrigerant in the diaphragm box as a power source, the expansion valve will fail due to inability to operate. The failure of the thermal expansion valve will cause system blockage, and the air-conditioning system will not cool, causing customer complaints.
[0003] Due to the conventional welding device, the membrane box cannot be better protected during welding, which makes the membrane box easy to burn after welding. In addition, the existing welding device does not effectively position the membrane box. When the spindle rotates for welding, the circular runout of the membrane box is large, and the welding strength is not high. Figure 1 As shown, it mainly consists of a left pressure head 1, a diaphragm box 2, a right pressure head 3, etc. Diaphragm box welding process: put the diaphragm box 2 into the left pressure head 1, the right pressure head 3 presses the diaphragm box 2 tightly, the welding gun 4 performs discharge welding, and the left pressure head 1 rotates one circle to complete the welding. Due to the error in the size of the diaphragm box itself, the left pressure head 1 and the right pressure head 3 have a large uncertainty in the matching with the diaphragm box 2, which causes the vibration of the diaphragm box 2 to increase during rotation. The large vibration will cause uneven welds after welding, resulting in cold welding of the diaphragm box or even failure to weld in some places. Due to the high welding temperature, conventional welding devices do not take into account the heat dissipation problem, which makes the diaphragm box 2 prone to overburning after long-term welding, affecting the overall welding quality of the diaphragm box. Summary of the invention
[0004] The purpose of the diaphragm box welding device for a thermal expansion valve described in the utility model is to solve the above-mentioned problems and shortcomings, and to provide a new type of diaphragm box welding device, which has a compact structure and controllable welding effect quality, can solve the problem of unstable diaphragm box welding quality, and is widely used in various thermal expansion valve diaphragm box welding.
[0005] The membrane box welding device of the utility model mainly comprises a left pressure head, a three-jaw automatic centering device, a right pressure head, a welding gun and a membrane box, and is characterized in that: a row of rectangular heat dissipation grooves are distributed on the left pressure head, and a row of rectangular heat dissipation grooves are also distributed on the right pressure head; the membrane box is automatically centered by the three-jaw automatic centering device when installed; the three jaws of the three-jaw automatic centering device are evenly distributed around the membrane box at 120°.
[0006] The utility model also includes the following additional technical features:
[0007] The left pressure head and the right pressure head are pressed tightly and welded to form a protective cavity for the membrane box.
[0008] The left pressure head and the right pressure head are made of pure copper with excellent heat dissipation.
[0009] Compared with the related art, the diaphragm box welding device of a thermal expansion valve provided by the utility model has the following beneficial effects:
[0010] The utility model forms a protective cavity for the membrane box after the left pressure head and the right pressure head are pressed tightly, and the welding gun is only aimed at the welding surface, which can effectively prevent overburning of other parts during welding.
[0011] The utility model has a row of rectangular heat dissipation slots respectively distributed on the left pressure head and the right pressure head, and the material is pure copper with excellent heat dissipation, which can quickly dissipate the heat generated during welding, thereby protecting the membrane box from overburning.
[0012] The utility model can solve the problem of beating caused by the size deviation of parts during welding by automatic centering of the three-jaw chuck, and has good welding consistency.
[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The present invention is a structural diagram of a diaphragm welding device for a known thermal expansion valve.
[0015] 1-left pressure head, 2-diaphragm box, 3-right pressure head, 4-welding gun.
[0016] Figure 2 The utility model is a structural diagram of the diaphragm box welding device of the thermal expansion valve.
[0017] 1-left pressure head, 2-three-jaw automatic centering device, 3-right pressure head, 4-welding gun, 5-diaphragm box.
[0018] Figure 3 It is a three-dimensional schematic diagram of a diaphragm box welding device of a thermal expansion valve of the utility model.
[0019] 1-left pressure head, 2-three-jaw automatic centering device, 3-right pressure head, 4-welding gun, 5-diaphragm box. DETAILED DESCRIPTION
[0020] like Figure 2 , Figure 3 As shown, the utility model mainly consists of a left pressure head 1, a three-claw automatic centering device 2, a right pressure head 3, a welding gun 4, etc. A row of rectangular heat dissipation slots are distributed on the left pressure head 1, and a row of rectangular heat dissipation slots are also distributed on the right pressure head 3. When the membrane box 5 is installed, it is automatically centered by the three-claw automatic centering device 2, and the three-claw automatic centering device 2 is evenly distributed around the membrane box 5 at 120°. When the left pressure head 1 and the right pressure head 3 are pressed and welded, a protective cavity is formed for the membrane box. The left pressure head 1 and the right pressure head 3 are made of pure copper with excellent heat dissipation.
[0021] The diaphragm box welding process is as follows:
[0022] Turn on the equipment, put the membrane box 5 on the left pressure head 1, the three-claw automatic centering device 2 automatically centers and clamps the position of the membrane box 5, then move the right pressure head 3 to the left to press and fix the membrane box 5, the left pressure head 1 starts to rotate, the welding gun 4 starts welding, the left pressure head 1 rotates one circle to weld, the right pressure head 3 moves to the right, the three-claw automatic centering device 2 loosens the clamping, removes the welded membrane box 5 from the left pressure head 1, and the welding is completed. Since the left pressure head 1 and the right pressure head 3 are pressed and welded to form a protective cavity for the membrane box 5, the welding quality is good, the three-claw automatic centering device 2 automatically centers, the membrane box 5 has small jumps during welding, and the welding consistency is good.
[0023] The above examples are only used to illustrate rather than limit the technical solution of the present utility model. Any modification or partial replacement that does not deviate from the spirit and scope of the present utility model should be included in the scope of the claims of the present utility model.
Claims
1. A thermal expansion valve diaphragm welding device, mainly comprising a left pressure head (1), a three-claw automatic centering device (2), a right pressure head (3), a welding gun (4), and a diaphragm box (5), characterized in that: A row of rectangular heat dissipation grooves is distributed on the left pressure head (1), and a row of rectangular heat dissipation grooves is also distributed on the right pressure head (3); the membrane box (5) is automatically centered by a three-claw automatic centering device (2) when it is installed; the three claws of the three-claw automatic centering device (2) are evenly distributed at 120 degrees around the membrane box (5).
2. A thermal expansion valve diaphragm welding device according to claim 1, characterized in that: When the left pressure head (1) and the right pressure head (3) are pressed and welded, a protective cavity is formed for the membrane box (5).
3. A thermal expansion valve diaphragm welding device according to claim 1, characterized in that: The left pressure head (1) and the right pressure head (3) are made of pure copper with excellent heat dissipation properties.