CN-122025350-A - Electric control valve coil shell assembly and manufacturing auxiliary tool and manufacturing method thereof

CN122025350ACN 122025350 ACN122025350 ACN 122025350ACN-122025350-A

Abstract

The invention provides an electric control valve coil shell assembly, an auxiliary tool for manufacturing the same and a manufacturing method thereof. And the sealing grooves of the assembly part and the coil shell are filled with sealant, the periphery of the bending part is provided with a limit flange formed by press riveting, and the sealant and the limit flange are doubly matched, so that the tightness, the structural strength and the coaxiality of the connection of the coil shell and the support sleeve are ensured, and the running stability is improved. The manufacturing auxiliary tool comprises a positioning seat with a positioning column and a pressure head with a pressure ring. The manufacturing method comprises the steps of blank forming, gluing, assembling and pressure riveting, wherein the coil shell blank is formed by adopting steel cold extrusion, the support sleeve blank is formed by adopting stainless steel plate stretching, the material utilization rate is improved, the production efficiency is improved, and the structural strength, the sealing performance and the coaxiality of the assembly can be improved by matching with the manufacturing auxiliary tool, so that the efficient and high-quality production of the assembly is realized.

Inventors

XU XIAOCHUN
ZHAN YI
ZHANG HANLIANG
XU ZIXUAN

Assignees

苏州轩昌机电科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. The electric control valve coil housing assembly is characterized by comprising a coil housing and a supporting sleeve which are coaxially arranged; The coil comprises a coil shell, a first assembly hole, a second assembly hole and a third assembly hole, wherein the first assembly hole, the second assembly hole and the third assembly hole are sequentially arranged along the axial direction of the coil shell and are mutually communicated, the inner diameter of the first assembly hole is larger than that of the second assembly hole, a first limit step is formed between the first assembly hole and the second assembly hole, the inner diameter of the second assembly hole is larger than that of the third assembly hole, a second limit step is formed between the second assembly hole and the third assembly hole, and a sealing groove is formed at one end, close to the third assembly hole, of the second assembly hole; the support sleeve is of a hollow structure, the support sleeve is provided with a support part, a bending part and an assembling part which are sequentially arranged in the axial direction of the support sleeve, and the outer diameter of the assembling part is larger than that of the support part; the supporting part is positioned in the first assembly hole, the assembly part is in interference fit with the second assembly hole, one end, away from the bending part, of the assembly part abuts against the second limit step, sealing glue is filled between the assembly part and the groove wall of the sealing groove, a limit flange formed by press riveting is arranged at the first limit step, the limit flange is positioned on the periphery of the bending part, and the limit flange is in riveting fit with the bending part.
2. The electrically controlled valve coil housing assembly of claim 1, wherein a fourth mounting hole is further formed in the coil housing, the fourth mounting hole is formed in one end, away from the second mounting hole, of the third mounting hole, the inner diameter of the fourth mounting hole is larger than the inner diameter of the third mounting hole, and the fourth mounting hole is used for being connected with a valve body of an electrically controlled valve.
3. The electrically controlled valve coil housing assembly of claim 1, wherein the coil housing is formed by cold extrusion of steel having less than 0.1% carbon and the support sleeve is formed by stretching of stainless steel having less than 0.08% carbon.
4. The electrically controlled valve coil housing assembly of claim 1, wherein the sealant is a sealant having an upper temperature resistance of 200 ℃ or more, being resistant to refrigerator oil, and being resistant to refrigerant.
5. The electrically controlled valve coil housing assembly of claim 1, wherein an included angle between the outer wall of the bending part and the central axis of the supporting sleeve is 30-90 degrees, and the inner wall of the limit flange is tightly matched with the outer wall of the bending part.
6. The electrically controlled valve coil housing assembly of claim 1, wherein the axial length of the fitting portion is not greater than the axial length of the second fitting hole.
7. A manufacturing auxiliary tool for an electric control valve coil housing assembly according to any one of claims 1 to 6, wherein the manufacturing auxiliary tool comprises a positioning seat and a pressure head; the positioning seat is provided with a positioning column, the structure of the positioning column is matched with the structure of a third assembly hole in the electric control valve coil shell assembly and the structure of a supporting sleeve, and the positioning column penetrates into the supporting sleeve from the third assembly hole during press riveting so as to form internal positioning and supporting for the supporting sleeve; The pressing head is of a hollow cylindrical structure, the structure of the pressing head is matched with the structure of a first assembly hole in the electric control valve coil housing assembly and the structure of a supporting part of the supporting sleeve, a pressing ring is arranged at one axial end of the pressing head, the pressing head is used for being installed in the first assembly hole and sleeved on the outer side of the supporting part, the pressing ring is enabled to press a first limit step in the electric control valve coil housing assembly under the action of riveting force, and a limit flange in riveting fit with the bending part is formed on the periphery of the bending part in the electric control valve coil housing assembly.
8. The manufacturing auxiliary tool according to claim 7, wherein the pressing ring is formed by axially protruding a main body portion of the pressing head, and an inner diameter at an end face of the pressing ring is larger than an outer diameter of the supporting portion.
9. A manufacturing method of an electric control valve coil housing assembly is characterized by comprising the following steps: The method comprises the steps of forming a coil shell blank by adopting a steel cold extrusion forming process and adopting a stainless steel plate stretching forming process, wherein the coil shell blank is provided with a first assembly hole, a second assembly hole and a third assembly hole which are sequentially arranged along the axial direction of the coil shell blank and are mutually communicated, the inner diameter of the first assembly hole is larger than that of the second assembly hole, a first limit step is formed between the first assembly hole and the second assembly hole, the inner diameter of the second assembly hole is larger than that of the third assembly hole, a second limit step is formed between the second assembly hole and the third assembly hole, a sealing groove is formed at one end, close to the third assembly hole, of the second assembly hole, and the support sleeve blank is provided with a support part, a bending part and an assembly part which are sequentially arranged along the axial direction of the support sleeve blank, and the outer diameter of the assembly part is larger than that of the support part; gluing, namely filling sealant in the sealing groove; The support sleeve blank is arranged in the coil housing blank, the support part is positioned in the first assembly hole, the assembly part is in interference fit with the second assembly hole, and one end, far away from the bending part, of the assembly part abuts against the second limit step; the manufacturing auxiliary tool according to claim 7 is applied, a positioning column in the manufacturing auxiliary tool penetrates into the support sleeve blank from the third assembly hole to form internal positioning and support for the support sleeve blank, and a pressure head in the manufacturing auxiliary tool is arranged in the first assembly hole and sleeved on the outer side of the support part, so that a pressure ring on the pressure head abuts against the first limit step; And (3) riveting, namely applying riveting force along the axial direction of the pressure head and towards the second assembly hole on the pressure head, so that the pressure ring extrudes the first limit step, and forming a limit flange in riveting fit with the bending part at the periphery of the bending part, thereby preparing the electric control valve coil housing assembly.
10. The method of manufacturing an electrically controlled valve coil housing assembly according to claim 9, wherein the coil housing blank is made of a steel material having a carbon content of less than 0.1%, and the support sleeve blank is made of a stainless steel material having a carbon content of less than 0.08%.

Description

Electric control valve coil shell assembly and manufacturing auxiliary tool and manufacturing method thereof Technical Field The invention relates to the technical field of manufacturing of electric control valves of automobile air conditioner compressors, in particular to an electric control valve coil shell assembly, an auxiliary manufacturing tool and a manufacturing method thereof. Background The electric control valve of the automobile air conditioner compressor is a core control component in an automobile air conditioner system, and the working performance of the electric control valve directly determines the refrigeration efficiency, the running stability and the service life of the automobile air conditioner system. The coil shell component of the electric control valve is used as a key component of the electric control valve and bears the functions of magnetic conduction, support, sealing, positioning and the like, on one hand, the support sleeve and the coil shell are required to be in reliable sealing connection, the whole component is required to bear gas pressure (generally more than 1.7 MPa) from the valve body so as to adapt to pressure fluctuation in the running process of an automobile air conditioning system, and on the other hand, the connection part of the support sleeve and the coil shell is required to ensure higher coaxiality (coaxiality error is generally required to be controlled within 0.05 mm) so as to ensure smooth running of an iron core of the electric control valve, avoid faults such as clamping stagnation, leakage of the valve body and the like, and ensure the accurate control performance of the electric control valve. At present, in the manufacturing of an electric control valve coil shell assembly in the industry, a coil shell is subjected to turning finish machining after hot forging machining, or is directly subjected to turning forming by adopting an integral bar stock, and in the connecting link of a supporting sleeve and the coil shell, the copper brazing process is adopted to realize the sealing connection of the supporting sleeve and the coil shell. However, the coil shell adopts a manufacturing mode of turning after hot forging or bar integral turning, the material utilization rate is low, the manufacturing cost is increased, the turning working procedure is complex, and the production efficiency is low. The copper brazing link can generate high-temperature heat influence, and is easy to cause thermal deformation of the coil shell and the supporting sleeve, so that the coaxiality of the coil shell and the supporting sleeve can be damaged, and welding stress and welding defects can be generated, so that the structural strength, sealing performance and operation stability of the assembly are affected. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides an electric control valve coil housing assembly which has the advantages of improving the structural strength, sealing performance, high coaxiality and operation stability of a coil housing and a supporting sleeve, saving manufacturing cost and improving production efficiency. The invention aims to provide an auxiliary tool for manufacturing the electric control valve coil housing assembly, which ensures coaxiality and connection reliability of the electric control valve coil housing assembly, reduces assembly errors and improves assembly consistency. The invention aims to provide the manufacturing method of the electric control valve coil shell assembly, which has the advantages of improving the material utilization rate, simplifying the processing procedure, reducing the manufacturing cost, improving the production efficiency, guaranteeing the structural strength, the sealing performance and the coaxiality of the electric control valve coil shell assembly and realizing the efficient and high-quality production of the assembly. In order to achieve the above purpose, the invention adopts the following technical scheme: According to a first aspect of the present invention, an electrically controlled valve coil housing assembly is provided. The electric control valve coil housing assembly comprises a coil housing and a supporting sleeve which are coaxially arranged. The coil housing is internally provided with a first assembly hole, a second assembly hole and a third assembly hole which are sequentially arranged along the axial direction of the coil housing and are mutually communicated, the inner diameter of the first assembly hole is larger than that of the second assembly hole, a first limit step is formed between the first assembly hole and the second assembly hole, the inner diameter of the second assembly hole is larger than that of the third assembly hole, a second limit step is formed between the second assembly hole and the third assembly hole, and a sealing groove is formed at one end, close to the third assembly hole, of the second assembly hole. The support sleeve is