Process for producing an oil-cooled housing

Abstract

The application discloses a production process of an oil cooling machine shell, which comprises the following steps: 1) processing an inner tube, an outer tube, a large flange and a small flange; 2) assembling the machine shell; 3) welding the machine shell; 4) eliminating internal stress of the machine shell; 5) rough machining of the machine shell; 6) welding oil nozzles of the machine shell; 7) finishing machining of the machine shell; 8) welding bottom corners of the machine shell; and 9) rust removal treatment of the machine shell. The oil cooling machine shell is produced by using the inner tube, the outer tube, the large flange and the small flange, and the production efficiency and the production quality of the machine shell can be improved. In order to improve the appearance and practical leakage-proof capability of the oil cooling machine shell, special structures of the inner tube, the outer tube, the large flange and the small flange are designed for facilitating assembly and welding, so as to guarantee the hiding of welding seams and the strength of the welding seams, greatly improve the leakage-proof capability of the welding seams and the convenience during welding, the welding seam position is accurate, the fusion welding capability is improved, and the components can be better welded together.

Description

Technical Field

[0001] This invention relates to a manufacturing process for an oil cooler housing. Background Technology

[0002] Oil-cooled housings are crucial components of motors, typically constructed from inner and outer tubes, large flanges, and small flanges. Current manufacturing processes for oil-cooled housings present several risks after the assembly and welding of these components. These risks include oil leakage, unmanageable weld spatter, and significant dimensional deformation during machining. Welded dimensions can change with subsequent processing. Furthermore, the lack of a step during welding easily leads to misalignment and poor coaxiality, with only straight ends exhibiting relatively high concentricity. This results in increased vibration throughout the motor, assembly difficulties, and directly impacts bearing life. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a manufacturing process for an oil cooler housing, comprising the following steps: 1) Machining inner pipes, outer pipes, large flanges, and small flanges: At the upper and lower ends of the outer peripheral wall of the vertical inner tube, circular outer stops coaxial with the inner tube are machined. At the upper and lower ends of the inner circumferential wall of the vertical outer tube, circular inner stops coaxial with the outer tube are machined. A circular lower step, coaxial with the large flange and used to support the lower outer stop of the inner tube and the lower inner stop of the outer tube, and a circular groove, coaxial with the large flange and located around the lower step, are machined on the upper end face of the flat large flange. A circular upper step, coaxial with the small flange and used to insert between the upper outer stop of the inner tube and the upper inner stop of the outer tube, and a circular inner stop, coaxial with the small flange and located on the inner ring of the upper step, are machined to fit with the upper outer stop of the inner tube. Furthermore, the vertical lengths of the lower end outer stop of the inner tube, the lower end inner stop of the outer tube, and the lower step are the same; the vertical length of the upper step is greater than the vertical lengths of the upper end outer stop of the inner tube and the upper end inner stop of the outer tube; the vertical lengths of the upper end outer stop of the inner tube, the upper end inner stop of the outer tube, and the upper step inner stop are the same. 2) Assemble the casing: Lay the large flange flat with the lower step facing upwards; Slide the lower ends of the inner and outer pipes onto the upper end of the large flange, and ensure that the lower outer stop of the inner pipe and the lower inner stop of the outer pipe are both supported by the lower step. Place the small flange on the upper ends of the inner and outer pipes, so that the upper step is inserted between the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, so that the upper step is supported by the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, and the inner stop of the inner ring of the upper step fits with the outer stop of the upper end of the inner pipe. At this point, the inner tube, outer tube, large flange, and small flange together form the casing to be welded. 3) Casing welding: First, perform four-point welding on the inner and outer rings at both ends of the casing to initially fix the inner tube and outer tube to the large flange and small flange respectively; Then, using a hook or crane, the casing with the four-point welding completed is clamped onto an automatic welding machine to perform complete welding of the inner and outer rings at both ends of the casing, so that the inner tube and outer tube are sealed and connected to the large flange and small flange respectively. 4) Eliminate internal stress in the casing: The casing, after the inner and outer rings have been welded, will be left to cool and eliminate internal stress. 5) Rough machining of the casing: The stress-relieved housing is then transferred to a lathe for rough machining. 6) Fusible oil nozzle for housing welding: Welding nozzles to the machine housing after rough machining; 7) Precision machining of the casing: The machine housing with the welded oil nozzle is drilled with a drill jig or a center point hole is machined. Then, the inner hole, outer circle, and end face of the housing are precision machined to make the overall dimensions of the housing accurate to the dimensions required by the drawing. 8) Bottom corners of the casing welding: Weld the bottom corners of the finished machined casing; 9) Rust removal treatment of the casing: If the casing is rusty, clean it with a rust inhibitor or rust remover.

[0004] The advantages and beneficial effects of this invention are: it provides a production process for oil cooler housings, which uses inner tubes, outer tubes, large flanges and small flanges to produce oil cooler housings, thereby improving the production efficiency and quality of the housings.

[0005] This invention has the following characteristics: To improve the appearance and practical leak-proof capability of the oil cooler housing, this invention features a special structure for the inner tube, outer tube, large flange, and small flange, which facilitates assembly and welding. This ensures the concealment and strength of the weld, greatly enhancing the leak-proof capability of the weld and the ease of welding. Compared to the uncertainty of conventional weld positions, the weld position of this invention is precise and can improve fusion welding capability, allowing for better welding of various components together.

[0006] This invention provides an inner stop on the inner ring of the upper step of the small flange to mate with the outer stop at the upper end of the inner tube. The vertical lengths of the inner stop on the upper step and the outer stop at the upper end of the inner tube are the same, which facilitates the axial positioning of the small flange and prevents a large difference in concentricity between the small flange and the inner and outer tubes. This also makes the assembly and welding of the small flange easier, greatly improving the reliability and airtightness of the finished casing and reducing the number of rework operations.

[0007] The vertical length of the upper step in this invention is greater than the vertical length of the inner stop at the upper end of the outer tube, which facilitates the formation of a flat-bottomed weld groove, makes it easier to catch the molten welding wire, and effectively prevents problems such as welding porosity.

[0008] When assembling the small flange, the small flange is placed on the upper ends of the inner and outer pipes, so that the upper step is inserted between the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, and the upper step is supported by the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe. The small flange is assembled in an insertion manner, which greatly improves the stability of welding and prevents the flange from falling off and deforming during the welding process.

[0009] The present invention provides an annular groove on the upper end face of the large flange, which facilitates the entry and exit of the welding torch during welding without interference, and also makes subsequent processing of fillet fillets easier, making it easier to control welding quality and avoid waste or excessively low welding strength.

[0010] The production process of this invention can directly reduce the impact of welding deformation or high welding temperature, as well as the problems of poor concentricity and uneven wall thickness between the inner and outer rings. This invention uses a drilling jig or machining center point holes to ensure the accuracy of the mounting hole positions. With the production process of this invention, there will be no deformation inside the flow channel, and the internal dimensions of the flow channel can be effectively controlled, which can effectively control the uniformity of fluid flow in the flow channel, reduce the risk of overall machine heating and localized heating. Attached Figure Description

[0011] Figure 1 It is an assembly diagram of the inner tube, outer tube, large flange, and small flange; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view of point B in the middle. Detailed Implementation

[0012] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0013] The specific technical solution of this invention is as follows: like Figures 1 to 3As shown, the present invention provides a manufacturing process for an oil cooler housing, comprising the following steps: 1) Machining inner pipes, outer pipes, large flanges, and small flanges: At the upper and lower ends of the outer peripheral wall of the vertical inner tube, circular outer stops coaxial with the inner tube are machined. At the upper and lower ends of the inner circumferential wall of the vertical outer tube, circular inner stops coaxial with the outer tube are machined. A circular lower step, coaxial with the large flange and used to support the lower outer stop of the inner tube and the lower inner stop of the outer tube, and a circular groove, coaxial with the large flange and located around the lower step, are machined on the upper end face of the flat large flange. A circular upper step, coaxial with the small flange and used to insert between the upper outer stop of the inner tube and the upper inner stop of the outer tube, and a circular inner stop, coaxial with the small flange and located on the inner ring of the upper step, are machined to fit with the upper outer stop of the inner tube. Furthermore, the vertical lengths of the lower end outer stop of the inner tube, the lower end inner stop of the outer tube, and the lower step are the same; the vertical length of the upper step is greater than the vertical lengths of the upper end outer stop of the inner tube and the upper end inner stop of the outer tube; the vertical lengths of the upper end outer stop of the inner tube, the upper end inner stop of the outer tube, and the upper step inner stop are the same. 2) Assemble the casing: Lay the large flange flat with the lower step facing upwards; Slide the lower ends of the inner and outer pipes onto the upper end of the large flange, and ensure that the lower outer stop of the inner pipe and the lower inner stop of the outer pipe are both supported by the lower step. Place the small flange on the upper ends of the inner and outer pipes, so that the upper step is inserted between the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, so that the upper step is supported by the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, and the inner stop of the inner ring of the upper step fits with the outer stop of the upper end of the inner pipe. At this point, the inner tube, outer tube, large flange, and small flange together form the casing to be welded. 3) Casing welding: First, perform four-point welding on the inner and outer rings at the upper and lower ends of the casing to initially fix the inner and outer tubes to the large and small flanges respectively. Then, use a hook or crane to clamp the casing with the four-point welding completed on the automatic welding machine to perform complete welding on the inner and outer rings at the upper and lower ends of the casing, so that the inner and outer tubes are sealed to the large and small flanges respectively. 4) Eliminate internal stress in the casing: The casing, after the inner and outer rings have been welded, will be left to cool and eliminate internal stress. 5) Rough machining of the casing: The stress-relieved housing is then transferred to a lathe for rough machining. 6) Fusible oil nozzle for housing welding: Welding nozzles to the machine housing after rough machining; 7) Precision machining of the casing: The machine housing with the welded oil nozzle is drilled with a drill jig or a center point hole is machined. Then, the inner hole, outer circle, and end face of the housing are precision machined to make the overall dimensions of the housing accurate to the dimensions required by the drawing. 8) Bottom corners of the casing welding: Weld the bottom corners of the finished machined casing; 9) Rust removal treatment of the casing: If the casing is rusty, clean it with a rust inhibitor or rust remover.

[0014] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A manufacturing process for an oil cooler housing, characterized in that, Includes the following steps: 1) Machining inner pipes, outer pipes, large flanges, and small flanges: Circular outer stops are machined at the upper and lower ends of the outer circumferential wall of the vertical inner tube; Circular inner stops are machined at the upper and lower ends of the inner circumferential wall of the vertical outer tube; A circular lower step is machined on the upper end face of the flat flange to support the lower end outer stop of the inner tube and the lower end inner stop of the outer tube, as well as a circular groove located around the lower step. A circular upper step is machined on the lower end face of the flat small flange for inserting between the upper outer stop of the inner tube and the upper inner stop of the outer tube, and a circular inner stop is provided on the inner ring of the upper step for cooperating with the upper outer stop of the inner tube. Furthermore, the vertical lengths of the lower end outer stop of the inner tube, the lower end inner stop of the outer tube, and the lower step are the same; the vertical length of the upper step is greater than the vertical lengths of the upper end outer stop of the inner tube and the upper end inner stop of the outer tube; the vertical lengths of the upper end outer stop of the inner tube, the upper end inner stop of the outer tube, and the upper step inner stop are the same. 2) Assemble the casing: Lay the large flange flat with the lower step facing upwards; Slide the lower ends of the inner and outer pipes onto the upper end of the large flange, and ensure that the lower outer stop of the inner pipe and the lower inner stop of the outer pipe are both supported by the lower step. Place the small flange on the upper ends of the inner and outer pipes, so that the upper step is inserted between the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, so that the upper step is supported by the outer stop of the upper end of the inner pipe and the inner stop of the upper end of the outer pipe, and the inner stop of the inner ring of the upper step fits with the outer stop of the upper end of the inner pipe. At this point, the inner tube, outer tube, large flange, and small flange together form the casing to be welded.

2. The manufacturing process of the oil cooler housing according to claim 1, characterized in that, It also includes the following steps: 3) Casing welding: First, perform four-point welding on the inner and outer rings at both ends of the casing to initially fix the inner and outer pipes to the large and small flanges respectively; then, use a hook or crane to clamp the casing with the four-point welding completed on the automatic welding machine to perform complete welding on the inner and outer rings at both ends of the casing, so that the inner and outer pipes are sealed to the large and small flanges respectively.

3. The manufacturing process of the oil cooler housing according to claim 2, characterized in that, It also includes the following steps: 4) Eliminating internal stress in the casing: Allow the casing, after the inner and outer rings have been welded, to cool and eliminate internal stress.

4. The manufacturing process of the oil cooler housing according to claim 3, characterized in that, It also includes the following steps: 5) Rough machining of the housing: The housing, after stress relief, is transferred to a lathe for rough machining.

5. The manufacturing process of the oil cooler housing according to claim 4, characterized in that, It also includes the following steps: 6) Housing welding nozzle: For housing welding nozzles that have completed rough machining.

6. The manufacturing process of the oil cooler housing according to claim 5, characterized in that, It also includes the following steps: 7) Finishing of the housing: The housing with the welded oil nozzles is drilled on a drilling machine with a drill jig or a center point hole is machined; then the inner hole, outer circle and end face of the housing are precision machined to make the overall dimensions of the housing accurate to the dimensions required by the drawing.

7. The manufacturing process of the oil cooler housing according to claim 6, characterized in that, It also includes the following steps: 8) Bottom corner of the housing weld: Bottom corner of the housing weld after finishing.

8. The manufacturing process of the oil cooler housing according to claim 7, characterized in that, It also includes the following steps: 9) Rust removal treatment of the casing: If there is rust on the exterior of the casing, use rust inhibitor or rust remover to clean the casing.

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