A tool clamp for hydrogen energy motor shell end face machining

Abstract

The utility model provides a kind of tooling fixture for hydrogen energy motor shell end face processing.Can avoid the outer surface of workpiece, without secondary clamping in processing process, high efficiency, processing precision is guaranteed, and installation and dismounting method is simple and easy to operate.It includes base unit for positioning workpiece, for fixed workpiece's press -fitting unit;Base unit's bottom plate is installed to mesa;The four corners of the bottom plate of the base unit are provided with support column for supporting the press -fitting unit, and the bottom plate is provided with positioning pad for positioning workpiece;The press -fitting unit includes four support blocks, and four The support block can be detachably mounted on the support column, and the support block is divided into two groups, and each group includes first support block and second support block, respectively, the first support block and the second support block are connected by crossbeam respectively, the crossbeam is perpendicular to the center axis of workpiece, and the crossbeam is provided with limiting device in the middle.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for machining motor housings, specifically to a tooling fixture for machining the end face of a hydrogen energy motor housing. Background Technology

[0002] Specialized tooling fixtures are commonly used for machining the end faces of hydrogen fuel cell motor housings. Currently, the mainstream materials for hydrogen fuel cell motors are aluminum alloys and stainless steel. During machining, the housing is clamped by tooling to fix it, which can easily damage the housing. Machining two end faces requires existing tooling to be clamped twice, which is inefficient and makes it difficult to guarantee machining accuracy. Furthermore, the design of the tooling does not fully consider whether the workpiece can be easily disassembled after machining, resulting in difficulties in removing the workpiece and affecting the continuity of machining. Utility Model Content

[0003] To address the problems of easy damage to the workpiece surface, low clamping efficiency, difficulty in guaranteeing machining accuracy, and difficulty in disassembling and assembling workpieces in the current end face machining of hydrogen energy motor housings, this utility model provides a tooling fixture for end face machining of hydrogen energy motor housings. It can avoid damage to the outer surface of the workpiece, eliminate the need for secondary clamping during the machining process, achieve high efficiency, guarantee machining accuracy, and has a simple and easy installation and disassembly method.

[0004] The technical solution adopted by this utility model is: a tooling fixture for machining the end face of a hydrogen energy motor housing, which includes a base unit for positioning the workpiece and a pressing unit for fixing the workpiece; the base plate of the base unit is mounted on a table; support columns for supporting the pressing unit are provided at the four corners of the base plate of the base unit, and positioning pads for positioning the workpiece are provided on the base plate. The pressing unit includes four support blocks, which are detachably mounted on the support column. The support blocks are divided into two groups, each group including a first support block and a second support block. The first support block and the second support block are connected by a crossbeam. The crossbeam is perpendicular to the workpiece center axis and a limit device is provided in the middle of the crossbeam.

[0005] Its further features are: The positioning pad is provided in two parts: one positioning pad is provided with a circular positioning pin, and the other positioning pad is provided with a diamond-shaped positioning pin. One end of the crossbeam is detachably mounted on the first support block by a locking nut, and the other end is rotatably mounted on the second support block. A flip-top stop is provided on one side of the second support block. The limiting device includes a central clamping screw, a fixing nut is provided between the central clamping screw and the crossbeam, and a detachable mounting plate is provided at the bottom of the central clamping screw; The top plane of the pressure plate is provided with two positioning pins, the crossbeam is provided with positioning pin holes, and the bottom of the pressure plate is arc-shaped to fit the arc surface of the workpiece. Two sets of the crossbeam and the limiting device are provided, respectively located directly above the positioning pad.

[0006] In the above structure of this utility model, the base unit is used for axial positioning of the workpiece, and the pressing unit is used for radial positioning of the workpiece. The positioning element does not touch the shell of the workpiece, thus avoiding the phenomenon of the tooling damaging the shell and effectively protecting the surface structure of the workpiece. The base unit adopts a combination of circular positioning pins and diamond positioning pins for positioning, which can enhance the stability of positioning, avoid over-positioning, effectively avoid vibration and deviation during processing, and perfectly adapt to the needs of dual-hole positioning. In the structure of the crossbeam, one end of the crossbeam is detachably installed on the first support block by a locking nut, and the other end is rotatably installed on the second support block. A flip-top stop is provided on one side of the second support block, which not only facilitates the installation and disassembly of the workpiece, but also plays a role in preventing loss. The flip-top stop on one side can effectively prevent collisions between parts, further maintain the accuracy of tooling positioning, and protect each part. The limiting device that fits the bottom of the pressure plate with the arc surface of the workpiece can evenly distribute the force points and avoid stress concentration that could cause internal damage to the workpiece. The two positioning pins set on the top of the pressure plate ensure the consistency of the crossbar and the pressure plate as a whole in the longitudinal plane, further strengthening the integrity of each component in the pressing unit and avoiding the accumulation of assembly errors between detachable components that could cause positioning deviations. The press-fit unit can balance the force on the workpiece, avoiding problems such as workpiece tilting caused by uneven force when clamping on one side. It can fix two machining surfaces at the same time in one clamping, avoiding errors caused by re-clamping, further ensuring machining accuracy and improving work efficiency. 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. Base plate; 12. Positioning pad; 13. Support column; 14. Circular positioning pin; 15. Diamond positioning pin; 16. Anti-misalignment rod; 2. Press-fit unit; 21. First support block; 22. Second support block; 23. Crossbeam; 24. Locking nut; 25. Flip-top stop block; 26. Center clamping screw; 27. Fixing nut; 28. Pressure plate; 29. ​​Positioning pin; 3. Mounting platform. Detailed Implementation

[0009] The present invention will be further described in detail below with reference to embodiments: like Figure 1, Figure 2 As shown, this utility model provides a tooling fixture for machining the end face 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 plate 11 of the base unit 1 is mounted on a table 3. Support columns 13 for supporting the pressing unit 2 are provided at each of the four corners of the base plate 1. Positioning pads 12 for positioning the workpiece are provided on the base plate 11. Two positioning pads 12 are provided. One positioning pad 12 is equipped with a circular positioning pin 14, and the other positioning pad 12 is equipped with a diamond-shaped positioning pin 15. The positioning pads 12 coincide with the bottom planes of the two end faces of the workpiece to be processed. The base plate 11 is equipped with an anti-error rod 16 for positioning reference, standardizing the operational details during clamping and preventing workers from arbitrarily disregarding the left and right end faces of the workpiece during installation. The end caps of the workpiece are placed on the positioning pads 12, and the two positioning pins are installed in conjunction with the pre-set process holes on the workpiece to achieve axial positioning of the workpiece. The combination of the circular and diamond-shaped positioning pins achieves precise positioning with strong positioning stability.

[0010] The pressing unit 2 includes four support blocks, which are detachably mounted on the support column 13. The support blocks are divided into two groups, each group including a first support block 21 and a second support block 22. The first support block 21 and the second support block 22 are connected by a crossbeam 23. The crossbeam 23 is perpendicular to the workpiece center axis and has a limit device in the middle. One end of the crossbeam 23 is detachably mounted on the first support block 21 by a locking nut 24, and the other end is rotatably mounted on the second support block 22. A flip-top stop 25 is provided on one side of the second support block 22. The crossbeam 23 and the second support block 22 are rotatably mounted together using a hinge or hinge design. When pressing the workpiece, the unfixed end of the crossbeam 23 is screwed to the corresponding position of the first support block 21, the locking nut 24 is installed and rotated to the limit position to complete the pressing action. At this time, the radial degree of freedom of the workpiece is restricted, making the operation convenient and the steps simple. A flip-top stop 25 is also provided on one side of the second support block 22 to prevent impact and avoid operational errors during workpiece disassembly, which could lead to workpiece damage. The limiting device plays a major role in the pressing unit 2. The limiting device includes a center clamping screw 26, which is detachably installed at the center position of the crossbeam 23 by a fixing nut 27, further ensuring the stability and overall coordination of the mechanism. There are two sets of crossbeams 23 and limiting devices, which are respectively set directly above the positioning pad 12.

[0011] The center clamping screw 26 has a removable mounting plate 28 at its bottom. The bottom of the plate 28 is arc-shaped, which can ensure that the radial pressure on the workpiece is more uniform during the pressing process and avoid stress concentration that could damage the workpiece. The radial clamping force of the workpiece can be adjusted by adjusting the stroke of the center clamping screw 26.

[0012] Using the midpoint of the top plane of the pressure plate 28 as the dividing point, a positioning pin 29 is arranged on each side of the center point of the pressure plate 28. The crossbar 23 and the pressure plate 28 are connected by positioning pins to ensure the consistency of the crossbar 23 and the pressure plate 28 in the longitudinal plane. This ensures the stability of the overall structure of the pressing unit 2 and avoids problems such as inaccurate positioning or uneven force due to tilting of the pressing parts. If necessary, the pressure plate 28 can be designed non-standardly to adapt to the positioning of workpieces of different specifications of the same type, making the tooling more versatile and achieving the effect of making full use of design resources and saving costs.

[0013] This utility model provides a tooling fixture for machining the end face of a hydrogen energy motor housing. It features a simple structure, small footprint, and easy clamping and disassembly, solving the problem of difficult disassembly of existing tooling. The fixture adopts a symmetrical design, allowing simultaneous machining of two end faces with a single clamping action, avoiding inaccuracies and excessively long machining times caused by repeated clamping, thus greatly improving machining efficiency. The clamping components do not have unnecessary contact with the workpiece's outer shell, effectively avoiding appearance quality issues caused by scratches on the shell and further ensuring product quality.

[0014] 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 tooling fixture for machining the end face of a hydrogen fuel cell motor housing, characterized in that: It includes a base unit for positioning the workpiece and a pressing unit for fixing the workpiece; the base plate of the base unit is mounted on the table; the four corners of the base plate of the base unit are provided with support columns for supporting the pressing unit, and the base plate is provided with positioning pads for positioning the workpiece. The pressing unit includes four support blocks, which are detachably mounted on the support column. The support blocks are divided into two groups, each group including a first support block and a second support block. The first support block and the second support block are connected by a crossbeam. The crossbeam is perpendicular to the workpiece center axis and a limit device is provided in the middle of the crossbeam.

2. The tooling fixture for machining the end face of a hydrogen energy motor housing according to claim 1, characterized in that: Two positioning pads are provided, one with a circular positioning pin and the other with a diamond-shaped positioning pin.

3. A tooling fixture for machining the end face of a hydrogen fuel cell motor housing according to claim 1 or 2, characterized in that... One end of the crossbeam is detachably mounted on the first support block via a locking nut, and the other end is rotatably mounted on the second support block. A flip-top stop is provided on one side of the second support block.

4. The tooling fixture for machining the end face of a hydrogen energy motor housing according to claim 3, characterized in that: The limiting device includes a central clamping screw, which is installed at the center of the crossbeam by a fixing nut, and a pressure plate is fixedly installed at the bottom of the central clamping screw.

5. A tooling fixture for machining the end face of a hydrogen energy motor housing according to claim 4, characterized in that: The top plane of the pressure plate is provided with two positioning pins, the crossbeam is provided with positioning pin holes, and the bottom of the pressure plate is arc-shaped to fit the arc surface of the workpiece.

6. A tooling fixture for machining the end face of a hydrogen energy motor housing according to claim 5, characterized in that: Two sets of the crossbeam and the limiting device are provided, respectively located directly above the positioning pad.

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