Pure forging passenger car hub machining center circumferential positioning device

Abstract

The utility model discloses a circumferential positioning device of a pure forging passenger car hub machining center, which relates to the technical field of hub machining and comprises a handle, a positioning rod and a positioning block. According to the utility model, the circumferential positioning of the hub in a machining center is completed by virtue of the contact between the positioning block and the hub window and the contact between the positioning rod and the groove formed in the positioning block. In the machining process of the purely-forged passenger car hub, under the conditions that workblanks have certain axial deformation and the deformation amounts of the workblanks are inconsistent, a machining center uses the hub positioning device to conduct circumferential positioning on the hub, the consistency of the relative positions of a valve hole, a bolt hole and the like machined by the machining center and a purely-forged window can be better guaranteed, and the machining precision is improved. And the machining precision of products is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel hub processing, in particular to a circumferential positioning device for a pure forged passenger car wheel hub processing center. Background Art

[0002] At present, the pure forged passenger car wheel hub has a hub window that is directly forged and not processed later. The most common processing steps from the blank to the semi-finished product before spraying are to first turn the inner and outer rims, and then use the machining center to process the valve holes, bolt holes, decorative ring assembly holes and other positions.

[0003] There are two most common circumferential positioning methods for machining centers. One is to adjust the positioning angle by identifying the hub window shape in combination with a visual recognition positioning system. This positioning method requires cumbersome supporting equipment, high cost, and low market utilization rate. The other most commonly used method in the market is the positioning rod method, which relies on the positioning rod fixed on the fixture to contact the spoke to achieve circumferential positioning. In actual production, pure forged passenger car wheel hub blanks will have different degrees of axial deformation in various processes such as forging, spinning, and heat treatment, which will cause the position of the spoke back cavity product line relative to the spoke during machining to deviate. If the machining center uses the circumferential positioning method such as the positioning rod, its positioning accuracy will be severely limited, especially for wheels with large hub window draft angles. The relative positions of the valve holes, decorative ring assembly holes, etc. processed by the machining and the hub window are quite different on different hubs, and even the decorative rings or plug-ins that match the hub window cannot be installed, which poses certain quality and safety risks to production. Utility Model Content

[0004] In order to improve the shortcomings of the circumferential positioning method of the machining center during the processing of pure forged passenger car wheel hubs, namely, the high cost of the visual recognition method and the low positioning accuracy of the positioning rod method due to the inconsistent axial deformation of the blank. The utility model provides a circumferential positioning device for a pure forged passenger car wheel hub machining center, which is not only simple in structure, but also can effectively improve the positioning accuracy when the axial deformation of each wheel hub window is different, and ensure the consistency of the relative position of the valve hole, bolt hole, etc. processed by the machining center with the wheel hub window shape.

[0005] In view of the above technical problems, the technical solution adopted by the utility model is: a circumferential positioning device for a pure forged passenger car wheel hub machining center, including a positioning rod and a positioning block, the positioning block including positioning block side one, positioning block side two, positioning block side three, positioning block side four, positioning block top surface and positioning block bottom surface, the positioning block side one coincides with the inner side one of the hub window, the positioning block side two coincides with the inner side two of the hub window, the positioning block side three coincides with the inner side three of the hub window, thereby ensuring that the positioning block can be smoothly placed in the hub window under the action of gravity, and the two are firmly matched, a notch is provided on the end of the positioning block away from the positioning block side one, the notch runs through the positioning block from top to bottom, the notch cooperates with the positioning rod, and the positioning rod is rigidly fixed on the machine tool clamping device.

[0006] Furthermore, a handle is fixedly mounted on the positioning block, and two handles are provided. The two handles are fixedly mounted on the top surface of the positioning block, and the two handles are respectively located on both sides of the notch.

[0007] Furthermore, the bottom surface of the positioning block is higher than the spoke back cavity product line, and the distance between the bottom surface of the positioning block and the spoke back cavity product line is greater than 2 mm.

[0008] Furthermore, the shape of the notch is U-shaped.

[0009] Furthermore, the slot width of the slot is the same as the diameter of the positioning rod.

[0010] The beneficial effect of the utility model compared with the prior art is that when the valve holes, bolt holes and other positions of a pure forged passenger car wheel hub are processed in a machining center, compared with the common circumferential positioning method in which the positioning rod is directly in contact with the hub window, the machining center adopts the circumferential positioning method of the utility model. Even if the blank has a certain axial deformation, that is, the relative position of the spoke back cavity product line after machining is inconsistent with the blank spoke, the relative position stability of the valve holes, bolt holes, decorative ring assembly holes or plug-in holes processed by the machining center and the window shape can be ensured, which plays an important role in improving product precision and product consistency. Compared with the visual recognition system, this device has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is an axonometric structural diagram of a circumferential positioning device of a pure forged passenger car wheel hub machining center.

[0012] Figure 2 It is a main sectional view of a circumferential positioning device of a pure forged passenger car wheel hub machining center according to the utility model.

[0013] Figure 3It is a partial left sectional view of a circumferential positioning device of a pure forged passenger car wheel hub machining center according to the utility model.

[0014] In the figure: 1-handle; 2-positioning rod; 3-positioning block; 31-positioning block side one; 32-positioning block side two; 33-positioning block side three; 34-positioning block side four; 35-positioning block top surface; 36-positioning block bottom surface; 37-slot; 4-pure forged passenger car wheel hub; 5-hub window; 51-hub window inner side one; 52-hub window inner side two; 53-hub window inner side three; 54-spoke back cavity product line. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0016] Example: Figure 1-Figure 3 A circumferential positioning device for a pure forged passenger car wheel hub machining center is shown, comprising a positioning rod 2 and a positioning block 3. The positioning block 3 comprises a positioning block side 1 31, a positioning block side 2 32, a positioning block side 33, a positioning block side 4 34, a positioning block top surface 35 and a positioning block bottom surface 36. The positioning block side 1 31 coincides with an inner side 1 51 of the hub window, the positioning block side 2 32 coincides with an inner side 2 52 of the hub window, and the positioning block side 33 coincides with an inner side 3 53 of the hub window, thereby ensuring that the positioning block 3 can be smoothly placed in the hub window 5 under the action of gravity, and the two are firmly matched. A notch 37 is provided on the end of the positioning block 3 away from the positioning block side 1 31, and the notch 37 runs through the positioning block 3 from top to bottom. The notch 37 cooperates with the positioning rod 2, and the positioning rod 2 is rigidly fixed on the machine tool clamping device.

[0017] A handle 1 is also fixedly mounted on the positioning block 3 . Two handles 1 are provided. The two handles 1 are fixedly mounted on the top surface 35 of the positioning block 3 . The two handles 1 are respectively located on both sides of the notch 37 .

[0018] The bottom surface 36 of the positioning block is higher than the spoke back cavity product line 54, and the distance between the bottom surface 36 of the positioning block and the spoke back cavity product line 54 is greater than 2 mm, ensuring that the positioning block 3 can be implemented in the hub window 5 even if there is a certain axial deformation of the spoke position.

[0019] The notch 37 is U-shaped.

[0020] The width of the slot 37 is the same as the diameter of the positioning rod 2, ensuring that the positioning rod 2 can pass through the slot 37 smoothly. The gap between the two can be optimally designed according to actual conditions.

[0021] The handle 1 is rigidly connected to the positioning block 3 by bolts or welding, which is convenient for operators of the machining center to take and place.

[0022] When the utility model is used for operation, the axial and radial positioning of the hub blank can be selected according to the actual situation. The following combines the common axial positioning method in the form of pressure claws and end face blocks, the radial positioning method of the core shaft and the center hole with the circumferential positioning method of the utility model to describe the specific working process of the utility model.

[0023] After the pure forged passenger car wheel hub 4 is machined, when the valve holes, bolt holes and other positions are processed in the machining center, the pure forged passenger car wheel hub 4 is first placed on the machine tool clamping device, that is, the rim end face of the pure forged passenger car wheel hub 4 contacts the end face block, and the center hole of the pure forged passenger car wheel hub 4 cooperates with the core shaft. When placing, ensure that the positioning rod 2 passes through the wheel hub window 5 of the pure forged passenger car wheel hub 4. At this time, the pressure claws are not pressed, that is, the pure forged passenger car wheel hub 4 can rotate around the core shaft by a certain angle. Then, hold the handle 1 to place the positioning block 3 on the positioning rod 2 and in the wheel hub window 5, and make sure that the positioning block 3 is firmly fixed in the wheel hub window 5 of the pure forged passenger car wheel hub 4 without shaking by slightly adjusting the angle of the pure forged passenger car wheel hub 4, that is, the positioning block side 1 31 and the inner side 1 51 of the wheel hub window fit together, the positioning block side 2 32 and the inner side 2 52 of the wheel hub window fit together, and the positioning block side 3 33 and the inner side 3 53 of the wheel hub window fit together, and at this time, the positioning rod 2 should contact the notch 37 opened on the positioning block 3, so that the pure forged passenger car wheel hub 4 can no longer rotate around the core shaft, that is, the circumferential positioning of the machining center is completed; next, after the pressure claws apply pressure and clamp the pure forged passenger car wheel hub 4, hold the handle 1 to take the positioning block 3 out of the wheel hub window 5 of the pure forged passenger car wheel hub 4 vertically upwards, so that the positioning of the wheel hub in the machining center is completed, and the valve hole and other positions can be processed.

Claims

1. A circumferential positioning device for a pure forged passenger car wheel hub machining center, comprising a positioning rod (2) and a positioning block (3), characterized in that: The positioning block (3) comprises a positioning block side surface one (31), a positioning block side surface two (32), a positioning block side surface three (33), a positioning block side surface four (34), a positioning block top surface (35) and a positioning block bottom surface (36); the positioning block side surface one (31) matches with the inner side surface one (51) of the wheel hub window; the positioning block side surface two (32) matches with the inner side surface two (52) of the wheel hub window; the positioning block side surface three (33) matches with the inner side surface three (53) of the wheel hub window, thereby ensuring that the positioning block (3) can be smoothly placed in the wheel hub window (5) under the action of gravity, and the two are securely matched; a notch (37) is provided on one end of the positioning block (3) away from the positioning block side surface one (31); the notch (37) penetrates the positioning block (3) from top to bottom; the notch (37) matches with the positioning rod (2); and the positioning rod (2) is rigidly fixed on the machine tool clamping device.

2. A circumferential positioning device for a pure forged passenger car wheel hub machining center as claimed in claim 1, characterized in that: A handle (1) is also fixedly mounted on the positioning block (3). Two handles (1) are provided. The two handles (1) are fixedly mounted on the positioning block top surface (35) of the positioning block (3). The two handles (1) are respectively located on both sides of the notch (37).

3. A circumferential positioning device for a pure forged passenger car wheel hub machining center as claimed in claim 1, characterized in that: The bottom surface (36) of the positioning block is higher than the spoke back cavity product line (54), and the distance between the bottom surface (36) of the positioning block and the spoke back cavity product line (54) is greater than 2 mm.

4. A circumferential positioning device for a pure forged passenger car wheel hub machining center as claimed in claim 1, characterized in that: The shape of the notch (37) is U-shaped.

5. A circumferential positioning device for a pure forged passenger vehicle wheel hub machining center as claimed in claim 1, characterized in that: The slot width of the slot (37) is the same as the diameter of the positioning rod (2).

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