阅读说明：本技术 一种高精度轮毂加工装置 (High-precision hub machining device ) 是由 董祥义 李云龙 于 2019-10-18 设计创作，主要内容包括：本发明公开了一种高精度轮毂加工装置,解决了轮毂多次装夹而加工精度低的问题,解决该问题的技术方案主要包括机座、电机和安装于机座上的主轴,电机驱动主轴旋转,所述主轴上远离电机的一端设有带动轮毂同步转动的定心装置,定心装置与轮毂的中心孔配合,机座上固定有用于夹紧轮毂外周侧面的夹持片,夹持片设有多个并沿轮毂的周向分布于轮毂的外侧,至少两个在轮毂周向上相邻的夹持片之间设有供刀具车削的车削通道。本发明中夹持片固定于机座上,刀具在夹持片处可以穿过车削通道进行车削,轮毂的车削加工只需要一次装夹即可完成,提高了轮毂的加工精度。(The invention discloses a high-precision hub machining device, which solves the problem of low machining precision caused by repeated clamping of a hub, and the technical scheme for solving the problem mainly comprises a base, a motor and a spindle arranged on the base, wherein the motor drives the spindle to rotate, one end of the spindle, which is far away from the motor, is provided with a centering device for driving the hub to synchronously rotate, the centering device is matched with a center hole of the hub, a plurality of clamping sheets for clamping the peripheral side surface of the hub are fixed on the base, the clamping sheets are distributed on the outer side of the hub along the circumferential direction of the hub, and a turning channel for turning a cutter is arranged between at least two clamping sheets adjacent to each other in the circumferential direction of the hub. According to the invention, the clamping sheet is fixed on the base, the cutter can pass through the turning channel at the position of the clamping sheet for turning, the turning of the hub can be completed only by one-time clamping, and the processing precision of the hub is improved.)

1. The utility model provides a high accuracy wheel hub processingequipment, includes frame, motor and installs the main shaft on the frame, and motor drive main shaft is rotatory, its characterized in that, the one end of keeping away from the motor on the main shaft is equipped with the centering device who drives the synchronous pivoted of wheel hub, and centering device and wheel hub's centre bore cooperation are fixed with the centre gripping piece that is used for pressing from both sides tight wheel hub periphery side on the frame, and the centre gripping piece is equipped with a plurality ofly and distributes in wheel hub's the outside along wheel hub's circumference, and at least two are equipped with the turning passageway that supplies the cutter turning between the adjacent centre gripping piece in wheel.

2. The high-precision hub machining device according to claim 1, wherein the clamping pieces are provided with protrusions for reducing contact areas between the clamping pieces and the hub, the clamping pieces abut against the peripheral side face of the hub through the protrusions, and contact faces of the protrusions and the rotating hub are smooth curved faces.

3. A high-precision hub machining device according to claim 2, wherein the clamping pieces are provided with balls that are in rolling contact with the outer peripheral side surface of the hub, and the projecting portions are formed by the balls.

4. A high-precision hub machining device as claimed in claim 3, wherein the end of the clamping piece close to the hub is provided with a mounting hole for mounting a ball, the ball is rotatably matched with the mounting hole and protrudes out of the mounting hole, and the diameter of the mounting hole is smaller than that of the ball.

5. A high-precision hub machining device according to claim 2, wherein the projecting portion includes a semicircular projection that is in sliding contact with the outer peripheral side surface of the hub, and the semicircular projection is integrally formed with the clamping piece.

6. A high-precision hub machining device according to any one of claims 2 to 5, wherein an end of the clamping piece, which is close to the hub, is provided with an arc-shaped surface of revolution which is matched with the peripheral side surface of the hub, and the arc-shaped surface of revolution is provided with a plurality of the protrusions which are distributed along the circumferential direction of the hub.

7. A high-precision hub machining device according to any one of claims 1 to 5, wherein the clamping pieces abut against the root of the hub rim.

8. A high-precision hub machining device according to claim 7, wherein the clamping pieces are inclined α degrees or less to the main shaft from outside to inside in the radial direction.

9. A high-precision hub machining device according to any one of claims 1 to 5, wherein the centering device is a tensioning device, and the tensioning device is in interference fit with a central hole of the hub.

10. A high-precision hub machining device according to any one of claims 1 to 5, wherein the centering device is a fastening device, the fastening device is provided with a limiting surface, the hole wall of the center hole of the hub is provided with a matching surface, and the fastening device drives the hub to rotate circumferentially by abutting against the matching surface through the limiting surface.

Technical Field

The invention relates to the technical field of machine manufacturing, in particular to a high-precision hub machining device.

Background

The automobile hub is a cylindrical metal piece for supporting a tire, and the main processing mode is to fix a semi-finished product of the hub on a chuck clamp and then carry out turning on the outer side surface and the inner side surface of the hub. The chuck of the universal lathe is connected with the main shaft and rotates along with the main shaft, and the main shaft needs to bear the weight of a hub semi-finished product and the whole chuck, so that the load and the inertia moment of the main shaft are large, the power of a motor is increased, the main shaft is easy to bend, and the service life of the main shaft is influenced; meanwhile, the chuck clamps the hub, the exposed end needs to be machined firstly, then the hub is turned to machine the other end, the whole machining process needs to be assembled and disassembled twice, namely, the hub machining lathe needs to carry out twice tool setting, and the machining precision and the machining efficiency of the hub are reduced.

Disclosure of Invention

The invention aims to provide a high-precision hub machining device, which reduces the load and the inertia moment on a main shaft, can complete the turning of a hub only by once clamping, and improves the machining precision of the hub.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a high accuracy wheel hub processingequipment, includes frame, motor and installs the main shaft on the frame, and motor drive main shaft is rotatory, the one end of keeping away from the motor on the main shaft is equipped with the centering device who drives the synchronous pivoted of wheel hub, and centering device cooperates with wheel hub's centre bore, is fixed with the centre gripping piece that is used for pressing from both sides tight wheel hub periphery side on the frame, and the centre gripping piece is equipped with a plurality ofly and distributes in wheel hub's the outside along wheel hub's circumference, and at least two are equipped with the turning passageway that supplies the cutter turning between the adjacent centre gripping piece in wheel.

Further, be equipped with the bulge that is used for reducing clamping piece and wheel hub area of contact on the clamping piece, the clamping piece is contradicted in wheel hub's periphery side through the bulge, and the contact surface with rotation wheel hub on the bulge is smooth curved surface.

Further, the clamping pieces are provided with balls which are in rolling contact with the peripheral side face of the hub, and the protruding portions are formed by the balls.

Furthermore, one end, close to the hub, of each clamping piece is provided with a mounting hole used for mounting a ball, the ball is in running fit with the mounting hole and protrudes out of the mounting hole, and the diameter of the mounting hole is smaller than that of the ball.

Further, the bulge comprises a semicircular bulge in sliding contact with the peripheral side face of the hub, and the semicircular bulge and the clamping piece are integrally formed.

Furthermore, one end of the clamping piece, which is close to the hub, is provided with an arc-shaped revolution surface matched with the peripheral side surface of the hub, and the arc-shaped revolution surface is provided with a plurality of bulges which are distributed along the circumferential direction of the hub.

Furthermore, the clamping sheets abut against the root of the rim of the hub.

Furthermore, the clamping sheets incline α to the main shaft from outside to inside along the radial direction to be less than or equal to 60 degrees.

Furthermore, the centering device is a tensioning device, and the tensioning device is in interference fit with the central hole of the hub.

Furthermore, the centering device is a fastening device, the fastening device is provided with a limiting surface, a matching surface is arranged on the hole wall of the center hole of the wheel hub, and the fastening device drives the wheel hub to rotate in the circumferential direction through the interference of the limiting surface and the matching surface. After the technical scheme is adopted, the invention has the following advantages:

on the one hand, the centering device is matched with the center hole of the hub, the hub is driven to rotate along with the main shaft, rotary machining of the inner surface and the outer surface of the hub is achieved, centering of hub installation is facilitated, deflection of the main shaft relative to the hub during machining is prevented, and coaxiality of the hub and the main shaft is guaranteed. On the other hand, the clamping sheet is fixed on the base, namely the weight of the clamping sheet is not born by the main shaft any more, but is transferred to the base with stronger bearing capacity, so that the load and the inertia moment on the main shaft are reduced, the energy consumption for driving the main shaft to rotate is reduced, the influence on the processing precision of the hub caused by the stress, bending and deformation of the main shaft is avoided, and the service life of the main shaft is also ensured; simultaneously, the clamping piece is fixed in the wheel hub course of working, and the clamping piece no longer receives the effect of centrifugal force, and the clamping piece is higher to wheel hub's centre gripping stability and reliability, also avoids leaving obvious centre gripping vestige at wheel hub's periphery side. In addition, the clamping piece is fixed in the axial direction and the circumferential direction, so that the turning channel is fixed in the circumferential direction of the hub, when the cutter moves axially to the turning channel, the cutter and the clamping piece are located at different positions in the circumferential direction of the hub, namely the cutter is staggered with the clamping piece, the cutter does not interfere with the clamping piece, the cutter directly cuts the peripheral side face of the hub exposed from the turning channel, so that the turning of the hub can be completed only by one-time clamping, the machining error caused by multiple times of loading and unloading is avoided, the auxiliary time for machining the hub is shortened, and the machining precision of the hub is improved.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

fig. 1 is a partial sectional view of a high-precision hub machining device according to a first embodiment of the present invention;

FIG. 2 is a partial top view of the high precision hub machining apparatus according to the first embodiment;

fig. 3 is a structural view of a clamping piece in the second high-precision hub machining device according to the present embodiment.

Detailed Description