CN219358709U - Radial positioning device and positioning assembly for pure-forging passenger car hub machine - Google Patents

Abstract

A radial positioning device for a pure forging passenger car hub machine comprises a base, a center rod, a spring, a conical positioning block and a limiting block. The forging pit at the center hole of the hub blank is used as a radial positioning surface for positioning, and the problem of asynchronous relative positions between a finished rim and a window can be effectively solved after turning; and by means of the spring elastic element, even if the blank is deformed axially to different degrees, the radial positioning device can be ensured to be attached to the forged pit at the center hole of the hub blank, and the radial positioning device has important significance for improving machining yield. In addition, the positioning assembly comprises the pure forging passenger car hub machining radial positioning device, and a pressing claw and an end face block for axially positioning the hub.

Description

Radial positioning device and positioning assembly for pure-forging passenger car hub machine

Technical Field

The utility model relates to the field of hub processing and positioning, in particular to a machining radial positioning device and a positioning assembly for a hub of a pure forging passenger car.

Background

At present, the pure forging of the hub of the passenger car usually comprises direct forging and forming of a window, subsequent machining is omitted, and the rim is guaranteed by subsequent machining. The turning is typically two steps, first clamping the outer rim side blank, turning the inner rim side, then machining (i.e., machining) the outer rim side with the finished inner rim side as the locating surface.

When one side of the inner rim is machined, two common radial positioning modes are adopted, and one mode is to clamp the maximum diameter position of the outer rim of the blank for radial positioning by means of 3 or 4 radial end face blocks. When the hub is forged and formed by the passenger car, the maximum diameter positions of the hub window and the outer rim generally correspond to two parts of the forging die, so that certain asynchronism exists in the relative positions, for example, the relative positions of the hub window and the rim are finally caused to be asynchronized by adopting the positioning mode to perform radial positioning, the appearance of the wheel is influenced, and the balance characteristic of the hub is strictly influenced; the other is a rigid positioning mode, namely radial positioning is implemented by matching a conical positioning block fixed on a lathe chuck with a conical pit forged at the center hole of the blank. In actual production, the blank has axial deformation with different degrees in various working procedures such as forging, heat treatment and the like, and the deformation amount of the same working procedure is also different, if the radial positioning mode is adopted, the situation that the conical positioning block is not contacted with the conical pit forged by the blank is easy to exist, and finally the positioning precision is influenced.

Disclosure of Invention

In order to solve the problems that a positioning surface and a window are not synchronous, a conical positioning block and a blank are not contacted, and the like, in the conventional radial positioning mode for machining the hub of the pure forging passenger car, the utility model provides the radial positioning device and the positioning component for machining the hub of the pure forging passenger car, which can not only effectively solve the problem that the relative positions of a hub rim and the window are not synchronous, but also ensure that the radial positioning device is contacted with the blank even if the blank has certain axial deformation. Therefore, the machining positioning precision can be greatly improved, the machining yield of the hub of the pure-forging passenger car can be effectively improved, and the balance characteristic of the product can be improved.

In order to achieve the above object, the present utility model adopts the following technical scheme.

According to an aspect of the present utility model, there is provided a pure forging passenger car hub machining radial positioning device, comprising: the device comprises a base provided with a positioning groove, a center rod arranged in the base, a spring arranged on the center rod, a conical positioning block and a limiting block, wherein the lower surface of the spring is in contact with the base, the upper surface of the spring is in contact with the conical positioning block, the conical positioning block is provided with a conical outer peripheral surface and a positioning hole in clearance fit with the center rod, and the limiting block is arranged above the center rod and used for preventing the conical positioning block from falling off.

Preferably, the positioning groove is arranged at the lower end of the base for being fixedly installed with the chuck of the machine tool.

Preferably, the upper end of the base is provided with a stepped hole to be fixed on a chuck of a machine tool via a first bolt.

Preferably, the center rod is mounted at the center hole of the base in a transition fit manner, and the center rod and the base are respectively provided with a threaded hole and a through hole for fixing a second bolt.

Preferably, two second bolts are provided to screw from said threaded holes on both sides of the base to a position below the central rod.

Preferably, a third threaded hole is formed in the upper end face of the center rod, a stepped hole is formed in the limiting block, the third threaded hole and the stepped hole are connected through a third bolt, and after the third threaded hole and the stepped hole are connected and fixed, the spring is in a compressed state.

Preferably, the spring is always in a compressed state so that the conical positioning block is in matched contact with the conical concave pit forged at the position of the front center hole of the hub blank.

Preferably, a stepped portion for abutting against the lower portion of the stopper is formed on the upper side of the tapered positioning block.

According to another aspect of the utility model, there is provided a locating assembly comprising any of the above-described pure forge passenger car hub machining and radial locating devices, and a press jaw and end face block for axially locating the hub.

Compared with the prior art, the utility model has the beneficial effects that:

when the pure forging passenger car hub is machined, the radial positioning mode is adopted, so that on one hand, the synchronism of the relative positions of the hub rim and the window can be ensured, and the appearance and balance characteristics of the hub are improved; in addition, even if the blank is deformed in the axial direction in different degrees, the positioning block can be ensured to be always contacted with the blank, the positioning precision is improved, and the machining addition rate is improved.

Drawings

Fig. 1 is a front view of the present utility model.

In the figure: 1. the base, 2, the center rod, 3, the spring, 4, the cone-shaped locating block, 5, the stopper, 6, the wheel hub blank (the flange local position of the pure forging passenger car).

Detailed Description

The utility model will be further described with reference to the drawings and examples. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present utility model to enable one skilled in the art to make and use the present utility model in a number of different environments and for a number of different applications. The scope of the utility model is therefore defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, as limiting the scope of the utility model. Moreover, for ease of description, the dimensions of the various elements shown in the figures are not necessarily drawn to scale, and references to orientation, such as longitudinal, relative to the body, and orientation or positional relationships indicated above, below, left, right, top, bottom, etc., are based on the orientation or positional relationships shown in the figures, are merely for ease of describing the utility model and to simplify the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model. The following description of the embodiments emphasizes the differences between the embodiments, and the same or similar features may be referred to each other, so that technical features in the different embodiments may be freely combined to form further embodiments according to design needs for brevity and not described in detail.

The hub machining radial positioning device for the pure forging passenger car according to the embodiment of the utility model is described below with reference to the accompanying drawings.

A radial positioning device for a pure forging passenger car hub machine comprises a base 1, a center rod 2, a spring 3, a conical positioning block 4 and a limiting block 5; wherein the lower end of the base 1 is provided with a cylindrical positioning groove 7 which is mainly used for radial positioning with a machine tool chuck (not shown), the upper end of the base 1 is provided with a stepped hole 8, and the device can be fixed on the machine tool chuck by means of a first bolt; the center rod 2 is inserted into the center hole 9 of the base 1, the center rod 2 and the base 1 are in transition fit, and simultaneously two second bolts are screwed in from the threaded holes 10 on two sides of the base 1 until the second bolts extend to the position below the center rod 2, so that the effect of preventing the center rod 2 from being separated from the base 1 due to machine tool shake is achieved; a spring 3 is wound on the central rod 2; the lower end of the spring 3 is contacted with the base 1; the lower end of the conical positioning block 4 is contacted with the upper end of the spring 3; the upper end face of the center rod 2 is provided with a third threaded hole, the limiting block 5 is provided with a stepped hole, the center rod 2 and the limiting block are connected by means of a third bolt, and after the center rod 2 and the limiting block are fixedly connected, the spring 3 is in a compressed state, so that a stepped part 11 formed on the upper side of the conical positioning block 4 is abutted against the lower part of the limiting block 5.

When the utility model is used for operation, the axial positioning of the hub blank can be preferentially selected according to actual conditions, and the following is a description of the specific working process of the utility model by combining the axial positioning mode of the common pressing claw and end face block (not shown) with the radial positioning mode of the utility model: machining the inner rim side of the pure-forging passenger car hub, firstly placing a blank on a positioning clamp, forging a conical pit as shown in the figure at the center hole position of the hub blank 6, wherein the conical pit is consistent with the shape of the conical positioning block 4, continuously compressing the spring 3 under the action of gravity of the hub blank 6, and separating and abutting the conical positioning block 4 from a limiting block 5 in the axial direction without contact at the moment, so that the side surface of the conical pit of the blank is ensured to be tightly contacted with the side surface of the conical positioning block 4, and the radial positioning of the hub is completed; then the pressing claw starts to press the tire bead seat position of the blank, at the moment, the hub blank 6 and the conical positioning block 4 continue to move downwards under the pressure action of the pressing claw until the end face of the outer lip of the hub blank 6 contacts with the end face block, and the turning positioning of the hub blank 6 is completed.

Compared with the prior art, the utility model has the beneficial effects that: when the pure forging passenger car hub blank is processed, the synchronism of the relative positions of a window of a finished product and a rim can be ensured, and the appearance and balance characteristics of the hub are greatly improved; and by means of the acting force of the spring, even if the blank is deformed in the axial direction to different degrees, the conical positioning block 4 can be ensured to be always contacted with the hub blank 6, the positioning precision is improved, and the machining addition rate is improved.

Because the pit and the window of the hub correspond to the same part of the forging die, the synchronism of the relative positions of the rim and the window of the hub can be ensured, and the appearance and balance characteristics of the hub are improved. The shape of the conical concave pit forged by the conical positioning block 4 and the position of the front central hole of the hub blank is consistent, so that radial positioning can be performed by means of conical surface contact of the conical positioning block and the hub blank. The device adopts the spring elastic element, the spring 3 is arranged on the central rod 2, the spring 3 is in a compressed state under the action of the limiting block 5 even if a hub blank is not placed, the central rod 2 and the central hole on the conical positioning block 4 are in clearance fit, the conical positioning block 4 can move smoothly along the axial direction under the action force of the spring 3, and the conical positioning block and the blank can be ensured to be contacted under the premise that the blank is deformed axially to different degrees, so that the positioning precision is improved.

Here, the tapered positioning block 4 is exemplified as a positioning hole having a tapered outer peripheral surface and a clearance fit with the center rod 2, and the step portion 11 is formed on an upper side of the positioning hole. However, the tapered positioning block 4 is not limited to such a cylindrical structure, and a cap structure may be employed as long as it can appropriately fix the stopper and allow the tapered positioning block to slide along the center rod.

While the utility model has been described with reference to various specific embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the utility model not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims.

Claims (9)

1. The utility model provides a pure forge passenger car wheel hub machine adds radial positioning device which characterized in that includes: the device comprises a base provided with a positioning groove, a center rod arranged in the base, a spring arranged on the center rod, a conical positioning block and a limiting block, wherein the lower surface of the spring is in contact with the base, the upper surface of the spring is in contact with the conical positioning block, the conical positioning block is provided with a conical outer peripheral surface and a positioning hole in clearance fit with the center rod, and the limiting block is arranged above the center rod and used for preventing the conical positioning block from falling off.

2. The pure forge passenger car hub machining radial positioning device according to claim 1, wherein: the positioning groove is arranged at the lower end of the base and is used for being fixedly installed with a machine tool chuck.

3. The pure forge passenger car hub machining radial positioning device according to claim 1, wherein: the upper end of the base is provided with a stepped hole so as to be fixed on a machine tool chuck through a first bolt.

4. The pure forge passenger car hub machining radial positioning device according to claim 1, wherein: the center rod is mounted at the center hole of the base in a transition fit mode, and a threaded hole and a through hole for fixing the second bolt are formed in the center rod and the center rod respectively.

5. The pure forging passenger car hub machining radial positioning device according to claim 4, wherein: two second bolts are provided to screw in from the threaded holes on both sides of the base to a position below the central rod.

6. The pure forging passenger car hub machining radial positioning device according to claim 5, wherein: the upper end face of the center rod is provided with a third threaded hole, the limiting block is provided with a stepped hole, the third threaded hole and the stepped hole are connected by means of a third bolt, and after the third threaded hole and the stepped hole are fixedly connected, the spring is in a compressed state.

7. The pure forge passenger car hub machining radial positioning device according to claim 6, wherein: the spring is always in a compressed state so that the conical positioning block is in matched contact with the conical pit forged at the position of the front central hole of the hub blank.

8. The pure forge passenger car hub machining radial positioning device according to claim 1, wherein: the upper side of the conical positioning block is provided with a step part which is used for being abutted with the lower part of the limiting block.

9. A positioning assembly, characterized in that: comprising the pure forging passenger car hub machining radial positioning device as set forth in any one of claims 1 to 8, and a pressing claw and an end face block for axially positioning the hub.