JPS62263406A - Method and apparatus for detecting outer diameter of wheel rim for vehicle - Google Patents

Abstract

PURPOSE:To perform inspection with high accuracy, by reading the moving quantity of an object to be inspected in the vertical direction thereof to directly measure the outer diameter of a wheel to be measured. CONSTITUTION:A wheel rim outer diameter detector A is arranged to the lower part of a wheel rim molding machine. In this case, the detector A is constituted of the detection roll 40 interposed between a drive roll 10 and a press-down roll 20 to be contacted with the lower end part detection position of a wheel rim 30 subjected to stretching molding, a vertical moving cylinder 42 supporting the roll 40 in a state movable to a vertical direction and a horizontal moving cylinder 44 supporting said roll 40 in a horizontally movable state. By applying predetermined air pressures to the cylinders 42, 44, the roll 40 can follow the vertical and horizontal displacements of the rim 30. The linear scale 46 detecting vertical moving quantity of the roll 40 reads the detector needle 45 provided to the piston rod 43 of the cylinder 42. By this method, the outer diameter dimension of the rim 34 is directly detected in such a state that the ring-shaped material interposed between the rolls 10, 20 is rotated while being subjected to stretching molding.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method and device for detecting the outer diameter of a vehicle wheel rim. The present invention relates to a method and apparatus for detecting the outer diameter of a vehicle wheel rim, the purpose of which is to highly accurately detect the outer diameter of a vehicle wheel rim that is interposed and stretch-molded.

[Prior Art] Vehicle wheel rims are generally formed by a method called pressing, spinning, or ring roll processing. In the above-mentioned ring roll processing, a ring-shaped material is generally interposed between a drive roll and a reduction roll that face each other in the vertical direction, and the inner peripheral surface of the ring-shaped material is rotated by the drive roll. This method is known as a method of stretching and forming the material by lowering the material and bringing it into contact with the outer circumferential surface of the material. In this conventional ring roll processing, if the reduction roll is raised at the moment when the reduction roll reaches the set value, a step will be created between the processed part and the unprocessed part at the moment when the reduction roll is raised, which will affect the weight balance. Since there is a risk that both the roundness and roundness may deteriorate, conventional methods have been used to detect the position of the roll-down roll and control the roll gap and the thickness of the wheel rim (Japanese Unexamined Patent Application Publication No. 1983-62637). ,
(See Japanese Patent Application Laid-Open No. 58-90339).

[Problems to be Solved by the Invention] However, in the conventional method, the position of the pressure roll is detected and the roll gap is controlled, so even when the pressure roll is stopped, the ring-shaped The material is stretch-formed due to the elastic deformation (springback) of the material and the elastic deformation of the machine that occurs because the rigidity of the machine itself has a finite value, and the roll gap substantially changes. It becomes necessary. Furthermore, even if this precise control is possible, the deformation ω after the reduction roll stops is ff! Since it is affected by m and strength, irregularities in the molding of the material etc. will affect the product, resulting in large dimensional errors proportional to the diameter of the wheel rim.

Therefore, it is impossible to detect the exact outer diameter of the wheel rim using the method of controlling the roll gap at the end of machining. In addition, as a means of solving this problem,
There is also a molding method that uses a mold that restricts the outer diameter of the wheel rim to a specified size (Japanese Patent Laid-Open No. 57-171).
(Refer to Publication No. 537), when this method is actually processed, elongation in the circumferential direction takes priority and there is almost no movement of metal in the width direction, so in the case of wheel rims, there is a shortage of metal in the flange. There was a problem in that cracks occurred during the process, making it impossible to obtain a high-quality product.

[Means for Solving the Problems] This invention was made in view of the above circumstances, and in order to solve the above technical problems, the upper ends of the wheel rims at the extending portions of the drive roll and the reduction roll are fixed. Focusing on this, the present invention provides a method and device for detecting the outer diameter of a wheel rim for a vehicle, which is characterized by directly measuring the outer diameter of the wheel rim, which is the object of II measurement, and performing highly accurate detection. That is.

That is, firstly, the present invention involves interposing a ring-shaped material between a drive roll and a reduction roll that face each other in the vertical direction, and forming a vehicle wheel rim by stretch-forming. The detecting means can follow the lower end detection position of the wheel rim in the vertical and horizontal directions. The present invention provides a method for detecting the outer diameter of a vehicle wheel rim, which is characterized by detecting the outer diameter of a vehicle wheel rim. In addition, in a vehicle wheel rim that is formed by stretch forming, the detection means that comes into contact with the lower end detection position of the wheel rim is connected to a vertical movement means and a horizontal movement means in order to follow the displacement of the wheel rim. An object of the present invention is to provide a vehicle wheel rim outer diameter detecting device, characterized in that the detecting means is supported by the detecting means, and a detecting means for detecting the amount of vertical movement of the detecting means is engaged with the detecting means. .

In this invention, the detection means may have any shape as long as it comes into contact with the detection position of the wheel rim, but in order to follow the rotation of the wheel rim and come into contact with it, it must be a rotatable detection roll. is preferred.

[Effect] The above technical means works as follows.

While the ring-shaped material interposed between the drive FJ+ roll and the reduction roll is stretched and rotated, the detection means is caused to follow and contact in the vertical and horizontal directions, and the detection means is brought into contact with the detection member in the vertical direction. The outer dimension of the wheel rim can be directly detected by reading it with the transfer #J detection means.

[Examples] Examples of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view showing how the outer diameter detection device of the present invention is used, and FIGS. 2 and 3 are front and side views, respectively, of a vehicle wheel rim forming machine equipped with the outer diameter detection device of the present invention. This shows that. The wheel rim forming machine uses the substrate 1
A molding machine main body 4 is formed by constructing a horizontal frame 3 on top of four vertical frames 2 erected above, and fixed bearings 5 and movable bearings 6 face each other at the front and rear of the intermediate part of the molding machine main body. It is vertically moved by a rotatably supported drive roll 10 and a reduction cylinder 22 vertically installed on the horizontal frame 3 to face above the drive roll 10, and rotated by bearings 24 and 26 for the front and rear reduction rolls. The main part is constituted by a roll-down roll 20, which can be supported. In this case, the drive roll 10 is driven by a spindle 12 protruding toward the fixed bearing side and a transmission means such as a chain 18 that is strung around sprockets 14 and 16 respectively attached to the drive shaft 8 of the motor 7 installed on the board. It is supposed to be done.

Still, the movable bearing 6 can be moved toward and away from a predetermined position during use by a movable cylinder 9 installed on the substrate, and the movable bearing 6 can be moved toward and away from a predetermined position during use.
When taking out the wheel rim 30 formed by a ring-shaped material interposed between the wheel rim 30 and the wheel rim 30 by stretch forming, the moving cylinder 9 separates the wheel rim 30 from the drive roll 10.

In the wheel rim forming machine configured as described above, a ring-shaped material is interposed between the drive roll 10 and the reduction roll 20, and the drive roll 10 is rotationally driven, and the reduction roll 20 is rotated toward the ring-shaped material. When the ring-shaped material is rolled down, the ring-shaped material is stretched and formed into a wheel rim 30 having a predetermined cross-sectional shape. Note that guide rolls 32 and 34 are attached to both sides of the drive roll 10 by guide cylinders 36 and 38, respectively, for maintaining the centering of the wheel rim 30 during stretch forming. Also,
Reference numeral 31 denotes a deburring cutter, which is held by a deburring cylinder 33 installed on the vertical frame 2.

At the bottom of the wheel rim forming machine configured as above,
A wheel rim outer diameter detection device A of the present invention is provided. In this case, the wheel rim outer diameter detection device 1 of the present invention
12A is a detection roll 40 that is a detection means that is interposed between the driving roll 10 and the reduction roll 20 and comes into contact with the lower end detection position of the wheel rim 30 that is being stretched and formed; It is composed of a vertically moving cylinder 42, which is a means for movably supporting the detection roll 40 in the horizontal direction, and a horizontally moving cylinder 44, which is a means for supporting the detection roll 40 movably in the horizontal direction.
By applying a predetermined air/pressure to the wheel rim 4, the detection roll 40 can follow the vertical and horizontal displacements of the wheel rim 30. In addition, the detection roll 40
A linear scale 46, which is means for detecting the amount of vertical movement of the cylinder 42, is adapted to read a detection needle 45 provided on the piston rod 43 of the vertically moving cylinder 42 (see FIGS. 4 and 5). In the detection device configured in this way,
As shown in FIGS. 4 and 5, the detection roll 40 is attached to the wheel rim 30 in order to obtain accurate dimensional accuracy.
The bearing 49 has a circular arc portion 40a having the same shape as the speed seat portion 30a of
It is rotatably supported through. In addition, the shaft 48
A guide plate 50 is fixed to extend on both sides of the shaft 48, and guide shafts 52 and 54 projecting parallel to the shaft 48 on both sides of the guide plate 50 are fixed to the ball bush 5.
6.58 so as to be horizontally movable, so that even slight vibrations of the wheel rim 30 can be easily followed with a small force. In this case, as shown in FIGS. 6 to 8, both ends are supported by support brackets 62 and 64.
Guide bushes 56″, 5 are attached to the guide plate 50° with respect to the fixed guide shafts 52°, 54° supported at
8 degrees may be slidably fitted.

The method for detecting the outer diameter of a wheel rim according to the present invention will be explained below.

When forming a passenger car wheel rim with a nominal diameter of 406.4 m and a width of 203.4 m, the reduction cylinder 22
The molding process is performed with the pressure of Stretch molded, outer diameter is 300
Wheel rim 3 when it reaches the size of mttr
A detection roll 40 set in advance came into contact with the bead portion of 0. Next, when the outer diameter of the wheel rim 30 reaches about 320 mu, the horizontal movement cylinder 44 is activated to position the detection roll 40 on the bead seat portion 30a. As a result, the bead seat portion 30 of the wheel rim 30 being processed
The outer diameter a, that is, the dimension at the lower end detection position of the wheel rim 30 can be read with the linear scale 46. Then, when the outer diameter of the wheel rim 30 reaches 400#III+, the rolling down of the rolling down roll 20 is stopped, and after that, forming is continued using the residual pressure and the elastic deformation force of the machine, and when the outer diameter of the wheel rim 30 reaches 406.48, the rolling down of the rolling down roll 20 is stopped. to rise. As a result of molding the wheel rim 30 in this manner, the detection roll 40 sufficiently follows even when the wheel rim 30 is removed during molding, and a wheel rim 30 that meets the standards of 406.4±Q, 4111111 is obtained. I was able to do that. Note that the deflection of the wheel rim 30 in the circumferential direction is caused by the guide roll 32°3.
4 can be suppressed to some extent, and if the deviation is ±5, the detection error is about 0.03 mts, so there is no problem.

In the above embodiment, the vertical movement range of the detection roll 40 is detected using a linear scale, but the detection means does not necessarily have to be a linear scale, and other detection means such as a differential transformer type displacement meter can be used. Alternatively, if the pressure reduction cylinder 22 and the detection means are moved through the control system, the control can be performed automatically.

[Effects of the Invention] As explained above, according to the present invention, when the ring-shaped material interposed between the drive roll and the reduction roll is stretched and rotated, the detection means can be set vertically and horizontally. The outer diameter of the wheel rim is directly detected by following the direction of the wheel rim and making contact with the wheel rim, and by reading the vertical movement field of the detection object with the detection means, the following effects can be obtained.

1) Since the outer diameter of the wheel rim can be directly measured, there is no need for detailed position control of the reduction roll, and the control system can be simplified.

2) Even if the material is uneven by 1,000 meters, the detection means can follow and measure changes in the product diameter, making it possible to perform highly accurate measurements.

3) Management is easy because it is a precise control system and can measure high 1i degrees.

[Brief explanation of drawings]

Fig. 1 is a side view showing how the outer diameter detection device of the present invention is used, Fig. 2 is a front view of a wheel rim forming machine equipped with the outer diameter detection device of the present invention, and Fig. 3 is a side view of Fig. 2. Figure, 4th
The drawings are an enlarged view of the main part of FIG. 1, FIG. 5 is a schematic plan view of the detection means in this invention, FIG. 6 is a plan view showing a part of another detection means in this invention in cross section, and FIGS. FIG. 8 is a front view and a side view of FIG. 6, each partially shown in cross section. Mark 8 Explanation (10)...Carol roll (2o)...Down roll (30)...Wheel rim (40)...Detection roll (detection means) (42)...
Vertical movement cylinder (vertical movement means) (43)...Piston rod (44)...Horizontal movement cylinder (horizontal movement means) (4
5)...Detection needle (46)...Linear scale (detection means) (47)
... Piston (48) ... Shaft (49) ... Bearing patent application Artificial Light Metal Co., Ltd., same
Niigata Nikkei Koei Co., Ltd. Representative Patent Attorney
Tomohiro Nakamura (2 others) Figure 2 Figure 3

Claims (3)

[Claims] (1) When forming a vehicle wheel rim by interposing a ring-shaped material between a drive roll and a reduction roll that face each other in the vertical direction, and by stretch-forming, a detection means is installed at the lower end detection position of the wheel rim. An outer diameter of a wheel rim for a vehicle, characterized in that the wheel rim is brought into contact with the wheel rim so as to be trackable in vertical and horizontal directions, and a predetermined outer diameter dimension of the wheel rim is detected by reading the amount of movement of the detecting means in the vertical direction by the detecting means. Detection method. (2) In a device that forms a vehicle wheel rim by interposing a ring-shaped material between a drive roll and a reduction roll that face each other in the vertical direction, and by stretching the material, the ring-shaped material is brought into contact with the lower end detection position of the wheel rim. The detection means is supported by a vertical movement means and a horizontal movement means to follow the displacement of the wheel rim, and the detection means is engaged with a detection means for detecting the amount of vertical movement of the detection means. A vehicle wheel rim outer diameter detection device. (3) Claim 2, characterized in that the detection means is a detection roll that rotates as the wheel rim rotates.
The outer diameter detection device for a vehicle wheel rim as described in 2.