A kind of driving axle sleeve bores bush hole and mills the fixture of right and left side end face

Abstract

The utility model discloses a kind of drive axle sleeve tube bore bushing hole and milling positive and negative end face clamps, the clamp mainly includes clamping body, positioning mechanism, clamping mechanism and rotatable support mechanism.Positioning mechanism has multiple positioning pins and locating block, for accurately determining workpiece position;Clamping mechanism has multiple sets of clamping elements, for firmly fixed workpiece;Support mechanism has rotatable support arm.The invention realizes that drive axle sleeve tube can be completed side bushing hole boring and milling of two end faces of positive and negative in one clamping by the synergistic effect of above mechanism, effectively avoids the datum conversion error caused by secondary clamping of prior art, significantly improves the parallelism precision of product two end faces and production efficiency.

Description

Technical Field

[0001] This application relates to the field of fixture structures, specifically to a fixture for boring bushing holes and milling the front and back end faces of a drive axle bushing. Background Technology

[0002] Drive axle bushings are key load-bearing components in automotive chassis systems. The bushing holes on both ends and sides of the bushings typically require milling and boring to meet requirements for dimensional accuracy, parallelism, and positional accuracy.

[0003] In existing machining processes, the boring of the bushing hole on the side of the drive axle bushing and the milling of the two end faces usually need to be performed in separate steps. The operator first needs to clamp the workpiece on the boring fixture to bore the bushing hole; after boring, the workpiece must be removed from the fixture and re-clamped on another machine tool or another milling fixture before the milling of the two end faces can be performed.

[0004] This multi-clamping process has significant drawbacks: First, the secondary clamping process is cumbersome, increasing auxiliary time and severely reducing product processing efficiency, which is detrimental to the needs of large-scale production. Second, and more critically, because the reference points for the two clamping operations cannot be completely unified, positioning errors are inevitably introduced, making it difficult to guarantee the parallelism between the front and back end faces of the final machined workpiece. This excessive parallelism directly affects the assembly quality and performance of the drive axle assembly, thereby impacting the overall vehicle's driving safety and reliability. Utility Model Content

[0005] The purpose of this utility model is to overcome the defects of the existing technology and provide a jig for boring bushing holes and milling the front and back end faces of a drive axle bushing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A jig for boring bushing holes and milling the front and back end faces of a drive axle bushing includes a jig body and further includes: A positioning mechanism, mounted on the clamping body, is used to position the drive axle sleeve workpiece; the positioning mechanism includes multiple positioning elements. A clamping mechanism, mounted on the clamping body, is used to clamp the workpiece, and the clamping mechanism includes multiple clamping elements; A support mechanism, mounted on the clamping body, is used to support the end face of the workpiece, and the support mechanism includes a rotatable support element; The support mechanism is operable to rotate the support element to fit against the end face of the workpiece, thereby milling the front and back end faces directly after boring, ensuring the parallelism of the two end faces.

[0007] Furthermore, the positioning mechanism includes a first positioning pin, a second positioning pin, a first positioning block, and a second positioning block. The first positioning pin and the second positioning pin are used to position the holes of the workpiece, and the first positioning block and the second positioning block are used to position the side of the workpiece.

[0008] Furthermore, the clamping mechanism includes multiple clamping groups, each clamping group including a clamping rod, a pressure plate, and a fastener; wherein, the first clamping group includes a first clamping rod, a first pressure plate, a first bolt, and a first nut; the second clamping group includes a second clamping rod, a second pressure plate, a second bolt, and a second nut; the third clamping group includes a third clamping rod, a third pressure plate, a third bolt, and a third nut; and the fourth clamping group includes a fourth clamping rod and a fourth pressure plate.

[0009] Furthermore, the support mechanism includes a first support arm and a second support arm, which are rotatably mounted on the clamping body via a hinge connection.

[0010] Furthermore, the ends of the first and second support arms are provided with support heads, which are used to contact the end face of the workpiece and provide stable support by rotating to fit tightly against the end face.

[0011] Furthermore, the clamping mechanism includes a quick release mechanism, which enables rapid loading and unloading of the workpiece by loosening bolts or levers, thereby reducing clamping time.

[0012] Furthermore, the fixture is specifically designed for machining automotive drive axle bushings, enabling the boring of the side bushing holes and the milling of the front and back end faces to be completed in a single clamping operation, avoiding the need for secondary clamping.

[0013] Furthermore, the arrangement of the positioning mechanism, clamping mechanism, and support mechanism on the fixture body ensures that the workpiece remains stable during processing, guaranteeing the accuracy and parallelism of boring and milling end faces.

[0014] Furthermore, the clamping body includes a base and an upright plate, and the positioning mechanism, clamping mechanism and supporting mechanism are respectively installed on the base and the upright plate to form an integral rigid structure.

[0015] Furthermore, the rotation axis of the support mechanism is parallel to the end face of the workpiece, so that the first support arm and the second support arm can swing and adaptively fit against the end face of the workpiece to adapt to workpieces of different sizes.

[0016] The beneficial effects of this utility model are as follows: 1. This application integrates the processes of boring the side bushing hole and milling the front and back end faces into a single fixture for one-time clamping. This completely eliminates the secondary clamping, alignment, and adjustment time required due to process separation in traditional processes, greatly shortens the single-piece processing time of the product, and significantly improves production efficiency.

[0017] 2. The workpiece is clamped only once during the entire machining process, ensuring that all machining datums are unique and fixed, effectively avoiding the cumulative errors that inevitably result from multiple clampings and datum conversions. This results in extremely high parallelism at both ends of the machined drive axle sleeve, ensuring stable and reliable product quality. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention.

[0019] Figure 2 This is a side view of the present invention.

[0020] Figure 3 This is a top view of the present invention. Detailed Implementation

[0021] Reference Figures 1 to 3 This embodiment provides a special fixture for boring the side bushing hole and milling both the front and back end faces of a drive bridge sleeve in a single clamping operation. The core components of this fixture include a fixture body 1 serving as the mounting base, a positioning mechanism for determining the precise position of the workpiece, a clamping mechanism for firmly fixing the workpiece during machining, and a rotatable support mechanism specially designed for double-end face machining. The positioning mechanism mainly consists of a first positioning pin 2, a second positioning pin 6, a first positioning block 12, and a second positioning block 21. These components work together to restrict all six degrees of freedom of the workpiece by engaging with pre-drilled holes and the outer contour surface, ensuring the accuracy and repeatability of the positioning.

[0022] The clamping mechanism consists of multiple clamping elements, specifically including a first clamping group composed of clamping rod 5, pressure plate 7, bolt 8, and nut 9; a second clamping group composed of clamping rod 10, pressure plate 11, bolt 13, and nut 14; a third clamping group composed of clamping rod 15, pressure plate 16, bolt 17, and nut 18; and a fourth clamping group composed of clamping rod 19 and pressure plate 20. These clamping groups can be operated manually or in conjunction with pneumatic or hydraulic devices to apply a uniform and reliable clamping force to the workpiece. The key support mechanism includes a first support arm 3 and a second support arm 4, which are rotatably mounted on the fixture body 1 via hinges or pivots. Their ends are equipped with support heads to provide auxiliary support by pressing against the end face of the workpiece during processing.

[0023] The specific workflow of this fixture is as follows: First, the initial clamping and first-process machining of the workpiece are carried out. The operator places the drive axle sleeve workpiece in the fixture, so that its reference hole mates with the first positioning pin 2 and the second positioning pin 6, and its side is close to the first positioning block 12 and the second positioning block 21. After positioning is completed, the nuts of each clamping group, such as 9, 14, 18, etc., are tightened, and the workpiece is firmly pressed by the corresponding pressure plate. At this time, the support arms 3 and 4 are in the non-working position. Then, the machine tool first mills one end face of the workpiece, and then completes the boring of the side bushing hole. Next comes the support conversion and second end face machining. This stage is the essence of this invention. After completing the first end face and boring, there is no need to release the main clamping mechanism. The operator only needs to rotate the first support arm 3 and the second support arm 4 to the working position, so that their support heads are tightly pressed against the first end face that has just been machined. This establishes a new stable support using the machined precision datum surface. At this time, the workpiece is in a stable over-positioned state where one end is fixed by the original clamping mechanism and the other end is supported by the support arm. Subsequently, the machine tool can perform milling on the second end face of the workpiece. Since the workpiece does not undergo secondary clamping and datum conversion from beginning to end, all machining is completed based on the same positioning system, thus fundamentally ensuring extremely high parallelism accuracy of the two end faces. Finally, after all machining is completed, first rotate the first support arm 3 and the second support arm 4 back to their original positions, then release all clamping elements, and the finished workpiece can be removed.

[0024] In summary, this embodiment, through the specific structural design and operation process described above, successfully achieves the sequential completion of all key processes—boring, milling the positive end face, and milling the negative end face—in a single clamping operation. This not only greatly improves production efficiency but also eliminates secondary clamping errors through an innovative rotatable support mechanism, effectively guaranteeing the processing quality of the product, especially the parallelism of the two end faces. It has significant practical value and economic benefits.

Claims

1. A fixture for boring bushing holes and milling the front and back end faces of a drive axle bushing, comprising a fixture body (1), characterized in that, Also includes: A positioning mechanism is installed on the clamping body (1) for positioning the drive bridge sleeve workpiece. The positioning mechanism includes multiple positioning elements. A clamping mechanism is installed on the clamping body (1) for clamping the workpiece. The clamping mechanism includes multiple clamping elements. A support mechanism, mounted on the clamping body (1), is used to support the end face of the workpiece, and the support mechanism includes a rotatable support element; The support mechanism is operable to rotate the support element to fit against the end face of the workpiece, thereby milling the front and back end faces directly after boring, ensuring the parallelism of the two end faces.

2. The clamp according to claim 1, characterized in that, The positioning mechanism includes a first positioning pin (2), a second positioning pin (6), a first positioning block (12), and a second positioning block (21). The first positioning pin (2) and the second positioning pin (6) are used to position the holes of the workpiece, and the first positioning block (12) and the second positioning block (21) are used to position the sides of the workpiece.

3. The clamp according to claim 1, characterized in that, The clamping mechanism includes multiple clamping groups, each clamping group including a clamping rod, a pressure plate and a fastener; wherein, the first clamping group includes a first clamping rod (5), a first pressure plate (7), a first bolt (8) and a first nut (9), the second clamping group includes a second clamping rod (10), a second pressure plate (11), a second bolt (13) and a second nut (14), the third clamping group includes a third clamping rod (15), a third pressure plate (16), a third bolt (17) and a third nut (18), and the fourth clamping group includes a fourth clamping rod (19) and a fourth pressure plate (20).

4. The clamp according to claim 1, characterized in that, The support mechanism includes a first support arm (3) and a second support arm (4), which are rotatably mounted on the clamping body (1) by means of a hinge.

5. The clamp according to claim 4, characterized in that, The first support arm (3) and the second support arm (4) are provided with support heads at their ends. The support heads are used to contact the end face of the workpiece and provide stable support by rotating to fit the end face.

6. The clamp according to claim 1, characterized in that, The clamping mechanism includes a quick release mechanism, which enables rapid loading and unloading of the workpiece by loosening bolts or levers, reducing clamping time.

7. The clamp according to claim 1, characterized in that, The fixture is specifically designed for machining automotive drive axle bushings, enabling the boring of the side bushing holes and the milling of the front and back end faces to be completed in a single clamping operation, avoiding the need for secondary clamping.

8. The clamp according to claim 1, characterized in that, The arrangement of the positioning mechanism, clamping mechanism and support mechanism on the fixture body (1) ensures that the workpiece remains stable during the machining process, and ensures the accuracy and parallelism of boring and milling end faces.

9. The clamp according to claim 1, characterized in that, The clamping body (1) includes a base and an upright plate. The positioning mechanism, clamping mechanism and supporting mechanism are respectively installed on the base and the upright plate to form an integral rigid structure.

10. The clamp according to claim 4, characterized in that, The rotation axis of the support mechanism is parallel to the end face of the workpiece, so that the first support arm (3) and the second support arm (4) can swing and adaptively fit the end face of the workpiece to adapt to workpieces of different sizes.

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