Special fixture for planar processing of hydrogen energy motor shell
Patent Information
- Application Number
- CN202522110802.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0003]针对目前一种氢能源电机壳体平面加工用专用夹具，存在易损伤工件表面、排屑空间考虑不足，加工不到位，以及结构设计过于复杂导致续工装的维护难度高，加工效率低等问题，本实用新型提供一种氢能源电机壳体平面加工用专用夹具，加工中不易损伤工件的外壳，工装结构简单，装拆方便，便于维护，加工效率高
[0006]本实用新型的上述结构中，基座单元定位工件的底部基准面，压装单元限制工件的轴向自由度，基座单元设置支撑机构，可以有效分散工装压力，以工件现有的定位孔作为装夹基准，既能减少额外的固定结构设计，又能确保装配精度；
Smart Images
Figure CN224795134U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tooling technology for machining motor housings, specifically to a special fixture for machining the flat surface of a hydrogen energy motor housing. Background Technology
[0002] The planar machining process of hydrogen fuel cell motor housings often involves specialized tooling fixtures. However, the mainstream materials for hydrogen fuel cell motors are currently aluminum alloys and stainless steel. During machining, the housing is fixed by clamping it with tooling fixtures, which can easily damage the housing surface. Some tooling designs do not adequately consider reserving chip removal space, which can easily cause blind spots in the machining process due to chip accumulation, leading to problems such as incomplete machining and workpiece wear. Some tooling structures are too complex, making clamping and disassembly difficult. When machining multiple planes, the tool path design is difficult, and the tool and workpiece are prone to collision and interference. This also makes subsequent tooling maintenance difficult and reduces machining efficiency. Utility Model Content
[0003] To address the problems of existing special fixtures for machining the surface of hydrogen fuel cell motor housings, such as easy damage to the workpiece surface, insufficient chip removal space, inadequate machining, and high maintenance difficulty and low machining efficiency due to overly complex structural design, this utility model provides a special fixture for machining the surface of hydrogen fuel cell motor housings. This fixture is less likely to damage the workpiece shell during machining, has a simple tooling structure, is easy to assemble and disassemble, is easy to maintain, and has high machining efficiency.
[0004] The technical solution adopted by this utility model is: a special fixture for machining the plane of a hydrogen energy motor housing, characterized in that: it includes a base unit for positioning the workpiece and a pressing unit for fixing the workpiece, characterized in that: the base unit includes a support mechanism and a positioning device; the support mechanism includes a mounting base plate, and the mounting base plate is provided with a detachable support column; the positioning device includes a positioning ring, and the positioning ring has a positioning hole corresponding to the opening position of the workpiece reference surface; the pressing unit includes a circular pressure plate, the circular pressure plate is fitted onto a locking screw and connected by a locking nut, the locking screw is connected to the central support column by a threaded hole, the circular pressure plate is pressed onto the workpiece, and the circular pressure plate is provided with a lifting ring.
[0005] Its further features are: The support column includes a central support column and a positioning hole support column. Both ends of the central support column and the positioning hole support column are provided with threaded holes. The central support column is installed at the center of the mounting base plate, and the other end of the positioning hole support column corresponds one-to-one with the positioning hole position of the positioning ring. The positioning device is provided with a left baffle and a right baffle, and the left baffle and the right baffle are respectively provided with adjustable screws for adjusting the clamping force; the left baffle, the workpiece to be processed, and the right baffle are positioned and clamped together by the adjustable screws; An open pressure plate is provided between the circular pressure plate and the locking nut.
[0006] In the above structure of this utility model, the base unit positions the bottom reference surface of the workpiece, the press-fitting unit restricts the axial degree of freedom of the workpiece, and the base unit is equipped with a support mechanism, which can effectively disperse the tooling pressure. Using the existing positioning hole of the workpiece as the clamping reference can reduce the design of additional fixing structures and ensure assembly accuracy. All support columns use threaded connections, making tooling assembly and disassembly simpler, maintenance convenient, and repair costs low. Furthermore, by lifting the workpiece to a certain height through the support columns, it can prevent chips from falling onto the workpiece during processing, further reducing the probability of workpiece wear caused by processing. At the same time, it is conducive to the drainage of coolant during processing, and it is less likely to cause problems such as blockage. The left and right baffles reinforce the protrusions extending from one end of the workpiece's positioning reference surface, preventing the cutting force generated by the tool on the workpiece during machining from causing accuracy errors and further ensuring machining accuracy. The locking screw is designed to work in conjunction with the central support column to further restrict the coaxiality of the two end faces of the workpiece. The addition of an open pressure plate in the middle can optimize the clamping contact area, disperse the clamping force, and avoid excessive clamping force that could lead to plastic deformation, thus further ensuring the yield of the workpiece. Attached Figure Description
[0007] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partially disassembled structure of the present invention.
[0008] In the diagram: 1. Base unit; 11. Mounting base plate; 12. Positioning hole support column; 13. Central support column; 14. Positioning ring; 15. Left baffle; 16. Right baffle; 17. Support rod; 18. Adjustable screw; 19. Nut; 2. Press-fit unit; 21. Circular pressure plate; 22. Open pressure plate; 23. Locking nut; 24. Lifting ring; 25. Locking screw. Detailed Implementation
[0009] The present invention will be further described in detail below with reference to embodiments: like Figure 1 , Figure 2As shown, this utility model provides a special fixture for machining the plane of a hydrogen energy motor housing. It includes a base unit 1 for positioning the workpiece and a pressing unit 2 for fixing the workpiece. The base unit 1 includes a support mechanism and a positioning device. The support mechanism includes a mounting base plate 11, which is provided with a detachable support column. The positioning device includes a positioning ring 14, which has a positioning hole that corresponds to the opening position on the workpiece's reference surface. The pressing unit includes a circular pressure plate 21, which is fitted onto a locking screw 25 and connected by a locking nut 23. The locking screw 25 is connected to the central support column 13 by a threaded hole. The circular pressure plate 21 is pressed onto the workpiece. The circular pressure plate 21 is provided with a lifting ring 24. An open pressure plate 22 is provided between the circular pressure plate 21 and the locking nut 23.
[0010] The support column includes a central support column 13 and a positioning hole support column 12. Both ends of the central support column 13 and the positioning hole support column 12 are provided with threaded holes. The central support column 13 is installed at the center of the mounting base plate 11 and is fastened with the locking nut 23 in the press-fit unit 2. The other end of the positioning hole support column 12 corresponds one-to-one with the positioning hole position of the positioning ring 14. The central support column 13 and the positioning hole support column 12 play the role of raising the workpiece as a whole, which facilitates the cleaning of chips and avoids the situation where chip accumulation scratches the workpiece.
[0011] The positioning device is provided with a left baffle 15 and a right baffle 16. The left baffle 15 and the right baffle 16 are respectively provided with adjustable screws 18 for adjusting the clamping force. The left baffle 15, the workpiece to be processed, and the right baffle 16 are positioned and clamped together by the adjustable screws 18. First, place the positioning ring 14 on the support column according to the corresponding hole positions. The positioning ring 14 has a foolproof design and the outer ring has a process plane. During installation, it is positioned according to a unified standard. Then, the reference surface corresponding to the workpiece is installed on the positioning ring 14. After the hole positions are aligned, the fastening bolts are installed and locked. At this time, the other end of the support column is bolted to the mounting base plate 11. The support column is used as a connecting part. The opening on the positioning ring 14 on it corresponds one-to-one with the mounting hole position on the fixed base plate 11 below, and they are coaxial in space. After the initial installation, the vertical plane of the boss at the bottom positioning end face of the workpiece is the plane to be processed. In order to avoid the workpiece being subjected to forces from multiple directions during the tool movement, which would cause positioning errors and result in poor processing accuracy, the boss is locked from both ends by the adjustable screws 18 on the left baffle 15 and the right baffle 16 in the positioning device to further avoid lateral position deviation.
[0012] To prevent the workpiece from being plastically deformed due to the heavy pressure of the circular pressure plate 21, the surface of the circular pressure plate 21 is designed with uniform openings to make it lighter. This also achieves the overall lightweighting of the tooling fixture structure. The circular pressure plate 21 is installed on the other end face of the workpiece. Since it is inconvenient to operate the circular pressure plate 21 by hand and it is easy to lose your hand and cause a collision, a lifting ring 24 is set on it to prevent the end face of the workpiece from being damaged by collision during the installation process.
[0013] One end of the locking nut 23 in the press unit 2 is engaged with the threaded hole of the central support column 13 to play the role of axial limiting. An open pressure plate 22 is provided between the round pressure plate 21 and the locking nut 23. When the locking nut 23 is tightened, the clamping force can be evenly released to the round pressure plate 21 to avoid local stress concentration, uneven force on the workpiece, and plastic deformation and other problems. After clamping, the workpiece is subjected to uniform force, the coaxiality of the round holes on the upper and lower end faces is high, the positioning is accurate, the fixture structure is simple, and it is easy to assemble and disassemble. It is designed to be unobstructed around the plane to be processed. During the processing, the tool path only needs to circle around the outer ring of the workpiece shell. The tool path is simpler, the distance is shorter, the time is shorter, the processing efficiency is high, and the processing effect of each plane is better consistent.
[0014] This utility model provides a tooling fixture for machining the flat surface of a hydrogen energy motor housing. It has a simple structure, occupies little space, and is easy to clamp and disassemble, solving the problems of complex structure and difficult maintenance of existing tooling. The tooling positioning makes full use of the existing mounting holes of the workpiece, resulting in higher positioning accuracy and eliminating the need for unnecessary fixing structure design. The workpiece is clamped vertically, which shortens the tool travel between multiple surfaces to be machined, simplifies the path design, makes the machining process more compact, and increases efficiency. Furthermore, the chips can fall off due to gravity, eliminating the need for repeated cleaning during machining and preventing accumulation that could cause scratches on the workpiece surface. The clamping components do not contact the workpiece shell, effectively avoiding appearance and product quality issues caused by scratches on the shell, further ensuring product quality.
[0015] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all modifications or improvements made without departing from the spirit and concept of the present invention are within the protection scope of the present invention.
Claims
1. A special fixture for machining the surface of a hydrogen fuel cell motor housing, comprising a base unit for positioning the workpiece and a press-fit unit for fixing the workpiece, characterized in that: The base unit includes a support mechanism and a positioning device; the support mechanism includes a mounting base plate with a detachable support column; the positioning device includes a positioning ring with a positioning hole corresponding to the opening position on the workpiece reference surface; the pressing unit includes a circular pressure plate fitted onto a locking screw and connected by a locking nut, the locking screw being connected to the central support column by a threaded hole, the circular pressure plate being pressed onto the workpiece, and the circular pressure plate having a lifting ring.
2. The special fixture for machining the plane of a hydrogen energy motor housing according to claim 1, characterized in that: The support column includes a central support column and a positioning hole support column. Both ends of the central support column and the positioning hole support column are provided with threaded holes. The central support column is installed at the center of the mounting base plate, and the other end of the positioning hole support column corresponds one-to-one with the positioning hole position of the positioning ring.
3. A special fixture for machining the surface of a hydrogen energy motor housing according to claim 1 or 2, characterized in that: The positioning device is provided with a left baffle and a right baffle, and the left baffle and the right baffle are respectively provided with adjustable screws for adjusting the clamping force; the left baffle, the workpiece to be processed, and the right baffle are positioned and clamped together by the adjustable screws.
4. The special fixture for machining the plane of a hydrogen energy motor housing according to claim 3, characterized in that: An open pressure plate is provided between the circular pressure plate and the locking nut.