JPH04256824A - Deflection inspecting apparatus for automobile wheel - Google Patents

Abstract

PURPOSE:To achieve automation of spindle-head replacing work and improvement of the inspection accuracy for wheel deflection. CONSTITUTION:A clamping mechanism 24 which holds a spindle head 20 so that the head 20 is freely attached and removed is provided on a spindle 22. A rotary table 34 is provided at a position which is separated from the spindle. A loader for conveying a work is provided between the spindle and the rotary table. A master ring 44, which is mounted on the spindle head every time when the spindle head is replaced and detects the assembly error, is provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a runout inspection device for inspecting the runout of a tire mounting portion of an automobile wheel.

0002

[Prior Art] An automobile wheel runout inspection device has been previously filed by the present applicant (Japanese Patent Application No. 1-1739).
32). As shown in Fig. 5, the previously proposed runout inspection device has the following features:
The spindle head 4 is bolted to the spindle 2. As shown in FIG. The vertical runout and lateral runout of the wheel 6 were inspected by reading the displacement of the stylus roller 8 (runout in the wheel radial direction and wheel axial direction) at this time.

0003

[Problems to be Solved by the Invention] However, when inspecting different types of wheels, for example, the wheel shown in FIG. 7 and the wheel shown in FIG. At the same time, the spindle head 4 must be replaced. However, this exchange
The work is difficult because the bolts must be removed, the heavy spindle head 4 must be transported to another location, a new spindle head brought in, and the bolts tightened again. This improves the manufacturing efficiency of wheels that are produced in series. This was the bottleneck that was preventing us from doing so. Also, the bolts of the spindle head 4 to the spindle 2 are tightened at multiple locations in the circumferential direction, and depending on the tightening condition of each bolt, there is usually an assembly error of about 0.1 mm.Is this an error in the wheel itself? This makes it difficult to determine whether it is an assembly error of the spindle head 4.

One of the objects of the present invention is to automate the exchange of spindle heads required when inspecting different types of wheels, thereby facilitating and shortening the time. Another object of the present invention is to enable assembly errors of a spindle head to a spindle to be detected separately from wheel errors.

[0005]

[Means for Solving the Problems] In order to achieve the above object, an automobile wheel runout inspection device of the present invention includes the following means. Means of the invention according to claim 1: a clamp mechanism provided on the spindle for removably gripping the spindle head; a table for transferring the spindle head provided at a position spaced apart from the spindle in the horizontal direction; and the spindle and the table. A loader that grips and transfers the spindle head to be transferred between the two. Means of the invention according to claim 2 A mastering ring for accuracy verification that is detachably attached to a spindle head.

[0006]

[Operation] In the invention according to claim 1, when the type of wheel to be inspected changes and the spindle head is replaced, the clamp mechanism is first removed to make the spindle head removable from the spindle, and then the loader Grasp the spindle head, carry it from the spindle position to the rotary table position, and place it in an empty position on the rotary table. Before that, a new spindle head is already placed on the rotary table at a position opposite to the empty position. The rotary table is rotated 180 degrees, a new spindle head is brought to a position opposite to the loader, gripped by the loader, carried from the rotary table to the spindle position, placed on the spindle, and clamped to the spindle by a clamping mechanism. Since these transfers and attachments are performed automatically, it is much more efficient than the conventional spindle head replacement work that was done manually. In the invention according to claim 2, after the spindle head is mounted on the spindle as described above, instead of immediately mounting the wheel as in the conventional case, mastering for accuracy verification is applied to the spindle head before inspecting the wheel. Install the master ring, rotate the master ring, and observe the deflection of the stylus roller to detect assembly errors in the spindle head. Then, the misalignment between the axis of the spindle head and the axis of the spindle and the oblique orientation of the wheel set surface are stored in advance in the computer, and only the assembly error mentioned above is corrected for the measured values in the subsequent wheel inspection. By doing this, it becomes possible to calculate the true runout of the wheel. Thereby, highly accurate wheel runout inspection can be performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 show an automobile wheel runout inspection apparatus 10 according to the present invention. In FIGS. 1 and 2, reference numeral 12 denotes an entry conveyor, which transports a workpiece 14 consisting of a wheel to be inspected toward an inspection position. Reference numeral 16 is a stopper pin whose position can be adjusted in the workpiece advancing direction. By adjusting the position of the stopper pin 16 when the diameter of the workpiece changes, the center of the workpiece is always stopped at a constant position by the stopper pin 16. The workpiece 14 is conveyed from a stop position by a stopper pin to a workpiece measurement position by a lift-and-carry type feeder 18 while holding the workpiece from the left and right sides, and then transported to a measurement position 40 . The workpiece 14 is fixed to the spindle head 20 by a collet chuck.

As shown in FIG. 3, a spindle head 20
is removably fixed to the spindle 22 by a clamp mechanism 24. The clamp mechanism 24 clamps the spindle head 20 with spring force.
When releasing the clamp No. 4, the cylinder 26 is operated. The solid line in FIG. 3 indicates the clamping state of the clamp mechanism 24, 2
The dashed dotted line indicates the unclamped state. In Figure 2, 30
indicates a setup mechanism, which is lowered by a cylinder 28 to push the flange surface of the wheel and clamp it in the vertical direction to ensure alignment between the reference surface of the spindle head 20 and the wheel measurement reference surface. After the clamp is released, the workpiece is fixed to the spindle head by a collet chuck. In this state, the stylus roller 32 is brought into contact with the rim bead seat and flange of the workpiece, the spindle 22 is rotated, the workpiece 14 and the spindle head 20 are rotated, and the displacement of the stylus roller 32 is detected and the workpiece 1 is rotated.
4 vertical and horizontal vibrations are detected.

[0009] When the type of workpiece 14 changes, a spindle head 20 matching the type must be attached to the spindle 22, so the spindle head 20 is replaced. For this purpose, a rotary table 34 is provided at a position horizontally separated from the workpiece measurement position. The rotary table 34 has a position 36 to receive the spindle head that has been used until now, and a position 36 around the center of the rotary table.
and a position 38 for supplying a new spindle head in a position rotated by 80°. A new spindle head is previously supplied and mounted at the spindle head supply position 38 before the spindle head is replaced.

A reciprocating loader 42 is provided between the measurement position 40 and the position 36 of the rotary table 34, as shown in FIG. The loader 42 grasps the spindle head 20 to be replaced from the measurement position 40 and carries it to an empty position 36 of the rotary table, and the spindle head 20 supplied to the work supply position 38 of the rotary table rotates the rotary table 34 by 180 degrees. This new spindle head 20 is installed when it comes to a previously empty position.
is grasped and transferred to the workpiece measurement position 40. A clamping mechanism 24 clamps the spindle head 20 to the spindle 22. Thus, the replacement of the spindle head 20 is completed.

This newly installed spindle head 20
As shown in FIG. 3, a master ring 44 is attached to the. The master ring 44 is gripped by the collet chuck of the spindle head 20 on its inner diameter surface. In this state, the spindle 22 is rotated to rotate the master ring 44, and the deflection of the stylus roller 32 brought into contact with the master ring 44 is detected. Thereby, the assembly error of the spindle head 20 to the spindle 22 can be known in advance independently of the wheel.

Next, the master ring 44 is removed, and the workpiece 14 consisting of the wheel to be inspected is placed on the spindle head 2.
0, bring the stylus roller into contact with the workpiece 14 as described above, and rotate the spindle 22 to release the workpiece 14.
4. Inspect runout. The runout detected by the stylus roller 32 at this time is a combination of the workpiece itself and the runout due to an error in the assembly of the spindle head 20 onto the spindle 22. Because I know that
By correcting this amount, the true runout of the workpiece itself can be determined by computer calculations. Therefore, the accuracy of runout inspection is improved, and high-quality wheels can be provided. The preliminary run-out inspection by the mastering 44 described above is performed once every time the spindle head 20 is replaced.

[0013]

According to the invention as claimed in claim 1, since the exchange of the spindle head is automated, it is possible to improve work efficiency and free people from handling heavy objects. According to the invention of claim 2, it is possible to know the assembly error of the spindle head to the spindle independently from other errors through mastering, and the manufacturing error of the wheel itself can be determined with higher precision. It will be done.

[Brief explanation of the drawing]

FIG. 1 is an overall plan view of an automobile wheel runout inspection device according to an embodiment of the present invention.

FIG. 2 is a side view of the device of FIG. 1;

FIG. 3 is an enlarged sectional view of the spindle and spindle head portions of the apparatus shown in FIG. 2;

FIG. 4 is a schematic front view showing transportation of the spindle head by the loader.

FIG. 5 is a schematic cross-sectional view of a conventional spindle head and spindle.

FIG. 6 is a schematic cross-sectional view of wheel measurement using a conventional stylus roller.

FIG. 7 is a cross-sectional view of an example of a wheel.

FIG. 8 is a cross-sectional view of a different type of wheel from the wheel of FIG. 7;

[Explanation of symbols]

14 Work (wheel) 16 Stopper pin 18 Feeder 20 Spindle head 22 Spindle 24 Clamp mechanism 32 Stylus roller 34 Rotary table 42 Loader 44 Mastering

Claims (2)

[Claims] Claim 1: A wheel to be inspected for runout is mounted on a spindle head that is replaceably mounted on a spindle,
In an automobile wheel runout inspection device that inspects wheel runout by reading the displacement of the stylus roller when the wheel is rotated by bringing the stylus roller into contact with the wheel, the spindle head is detachably held on the spindle. A clamp mechanism is provided, a table for delivering the spindle head is provided at a position horizontally separated from the spindle, and a loader is provided between the spindle and the table for grasping and transferring the spindle head to be delivered. An automotive wheel runout inspection device featuring: [Claim 2] A wheel to be inspected for runout is mounted on a spindle head that is replaceably mounted on the spindle,
In an automobile wheel runout inspection device that inspects wheel runout by reading the displacement of the stylus roller when the wheel is rotated by contacting the stylus with the wheel, an accuracy verification device that is removably attached to the spindle head is used. Equipped with a master ring, each time the spindle head is replaced, the stylus roller is brought into contact with the master ring pre-installed on the spindle, and the displacement of the stylus roller when the master ring is rotated is read, thereby reducing assembly errors of the spindle head onto the spindle. An automobile wheel runout inspection device characterized by being capable of detecting runout.