JPS6343167B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for straightening the outer diameter of an annular article, and particularly to a press quench for an annular article that undergoes coreless quenching.

Generally, when an annular body is hardened, strain due to transformation stress and strain due to thermal stress interact with each other during heating and cooling, resulting in elliptical deformation and warp deformation in the annular article. If this deformation is large, the number of man-hours and machining allowance for the subsequent polishing process will increase, so it is necessary to keep the amount of deformation to a minimum. For this reason, conventionally, as shown in the quenching curve in Fig. 1, by utilizing the dimensional changes due to expansion and contraction of steel, the annular article is collected or split into a predetermined shape at the final stage of quenching and cooling (transformation shrinkage stage). A method of ensuring roundness and cylindricity has been considered.

The present applicant has already implemented the above-mentioned method in an apparatus for correcting the outer diameter of annular articles (Utility Model Registration No. 1356069), and has achieved considerable results in reducing elliptical deformation and warp deformation of annular articles. As shown in FIG. 2, the apparatus for correcting the outer diameter of an annular article is composed of a first mold a that can be raised and lowered, and a plurality of split molds 1 that are arranged to be contractible in the radial direction within the first mold a. The second type b
and a surface plate c provided with a coolant supply path,
The first mold a is screwed into an upper press head 3 having a coolant discharge passage 2, and a lower press head which has a tapered part on the inner periphery which abuts the tapered part of the split mold 1. 4, and a second mold b comprising a plurality of split molds 1 is attached to the tapered inner surface of the lower press head 4 via a mounting slide key 5. When the first mold a is lowered, the tapered part of the lower press head 4 presses the split mold 1 radially inward, and at the same time, the surface plate c
One continuous constraint that clamps and vertically fixes the split mold 1 between the surface and the lower end surface of the upper press head 3, and restrains the outer diameter of the annular article 6 during cooling by the inner peripheral surface of the split mold 1. It forms the inner circumferential surface of.

However, when trying to process a wide variety of model numbers with the outer diameter straightening device for annular articles having the above configuration, the processing requires a lot of effort, so the split mold 1 is expensive.
It was necessary to prepare the annular article 6 for each size.
Furthermore, the split mold 1 is large and heavy, making setup change work dangerous and complicated.

Therefore, in order to solve the above-mentioned problem when trying to process a wide variety of model numbers, the present applicant applied for
No. 103149 has already proposed an apparatus for correcting the outer diameter of an annular article, which does not require the preparation of many types of expensive split molds and can perform setup changes quickly and safely. As shown in FIG.
An outer diameter restraint plate 7 is removably attached to each of the outer diameter restraint plates 7, and the envelope surface of the inner diameter side end face of the outer diameter restraint plate 7 forms a nearly continuous state of restraint inner plate having predetermined roundness and cylindricity. It is designed to form a peripheral surface.

However, even in the apparatus for correcting the outer diameter of an annular article having the above configuration, the outer diameter restraining plate 7 is dedicated to each product, and therefore, although it is possible to simplify the setup change work, it still It was necessary to replace the outer diameter restraining plate 7 every time the type of the annular article 6 was changed, and it was also necessary to prepare a large number of outer diameter restraining plates 7 depending on the size of the annular article 6.

This invention aims to improve the above-mentioned problems of the prior art, by providing an outer diameter restraining plate movable in the diametrical direction (radial direction) of the annular article, and forming an envelope surface (outer diameter surface of the annular article that can be restrained). To provide an outer diameter correction device for an annular article that completely eliminates the need for setup changes every time the type of the annular article is changed by making the diameter dimension of the annular article freely adjustable over a wide range.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus for correcting the outer diameter of an annular article according to the present invention will be described below with reference to embodiments shown in the drawings.

In FIG. 4, the apparatus according to the present invention includes a press head A that is supported in a vertically movable manner by a hydraulic cylinder (not shown) so as to be able to move up and down a certain distance, and a press head that radiates in response to the vertical movement of the press head A. It is composed of a chuck B that slides in the direction and expands or contracts its diameter, and a surface plate C.

The press head A consists of a disc-shaped base plate 10 having a fitting hole 9 in the center, and a pressurizing cylinder 12 is fitted and installed in the fitting hole 9, leaving a coolant discharge path 11. A pressurizing body 15 presses the annular article 14 placed on the surface plate C from above at the lower end of the 12 piston rods 13.
is attached as one piece. The pressurizing body 15 is composed of a plurality of pressurizing plates 16, which are arranged radially as shown in FIG. It is attached to the tip of the piston rod 13.

The chuck B is made up of a plurality of outer diameter restraining plates 17 each fitted onto a plurality of sliders 18 which are installed to be movable in the diametrical direction (radial direction) of the annular article 14.
It is formed by.

The slider 18 has two small pieces 19 and 20 arranged facing each other at a distance, and a lower connection which connects and fixes these pieces and has an inclined surface 21 on the inner circumference side and a cam plate 22 on the outer circumference side. Member 23
and an upper connecting member 24, and a small piece 19,
20 and both connecting members 23 and 24 form a rectangular fitting hole 25 into which the outer diameter restriction plate 17 can be fitted. For example, the slider 18 is 12 to 18 in total.
The pieces are installed at equal intervals in the circumferential direction,
Each is formed by a guide hole 27 bored in the radial direction of the guide plate 26 and a space 28 provided between the guide plate 26 and the base plate 10 of the press head A so that the annular article 14 can slide in the diametrical direction. The upper connecting member 24 is dovetail-fitted into the dovetail groove 29.

Reference numeral 30 denotes a driving drive gear with internal teeth carved on the inner periphery, and is rotatably fitted into a cylindrical body 31 protruding from the outer periphery of the lower surface of the guide plate 26.
The press head A is rotated by a pulse motor 32 mounted on the base plate 10 of the press head A via a pinion 33. Three involute cams 34, 35, and 36 are superimposed and integrally attached to the lower surface of the driving drive gear 30, and as the driving drive gear 30 rotates, the three involute cams 34, 35, 3
6 also rotates in synchronization. The involute cams 34, 35, 36 have cam surfaces 34a, 35a, 36 defined by involute curves on the inner circumference.
a, and as shown in FIG. 5, they are overlapped with each other with a phase difference of 120 degrees and are integrally attached to the driving drive gear 30.

The sliders 18, 18, .
It is formed to face 35a and 36a.
The cam plate 22 is connected to the corresponding involute cam 34 by a coil spring 38 stretched between the annular body 37 which is clamped and fixed between the guide plate 26 and the base plate 10 and the upper connecting member 24 of the slider 18. , 35, 36 are always elastically engaged with the cam surfaces 34a, 35a, 36a.

The outer diameter restraining plate 17 is inserted into the fitting hole 25 of the slider 18 so that it can be detachably attached to the slider 18 and slidably in the axial direction of the annular component 14. Check B
form. The outer diameter restraining plate 17 has an inclined surface 39 along the inclined surface 21 of the slider 18 on the outer peripheral side end face, and an envelope circle is formed by the inner peripheral side end face of a large number of outer diameter restraining plates 17 finished to predetermined dimensions. This forms a near-continuous constraining inner diameter surface with a predetermined roundness and cylindricity. Note that the outer diameter restraining plate 17 has a long hole 40 formed in parallel with the inclined surface 39, and the slider 1 is inserted into this long hole 40.
A stopper pin 41 embedded in 8 is fitted to prevent it from falling downward.

The surface plate C has a coolant supply path 42 in the center,
The lower end of the press head A comes into contact with the connecting member 23 on the lower side of the chuck B.

The above is the configuration of the apparatus according to the present invention, and the operation of the above configuration will be explained as follows.
First, with the press head A positioned at the rising end, a chuck B predetermined according to the model number (shape and size) of the annular article 14 is formed. That is, when the drive gear 30 is rotated by a predetermined angle by the pulse motor 32 via the pinion 33,
The three involute cams 34, 35, 36 rotate synchronously, and the involute cams 34, 35, 36
Involute cam surfaces 34a, 35a, 36a of
Each slider 18 is simultaneously slid in the radial direction by a certain amount in the diametrical direction of the annular article 14 along the guide hole 27 of the guide plate 26 via the cam plate 22 that is constantly engaged with the slider 18. The envelope circle formed by the inner diameter side end surface of each outer diameter restraining plate 17 is contracted and expanded in diameter to form a chuck B corresponding to the model number of the annular object 14.

After the above work (conventional setup change work) is completed, the heated annular article 14 is fed onto the surface plate C. Subsequently, when the press head A is lowered and the chuck B integrally connected thereto is lowered, the lower end surface of each outer diameter restraint plate 17 comes into contact with the surface plate C during the descent, and each outer diameter restraint plate 17 is moved from the slider. 18 slopes 2
1, the diameter of the annular article 14 is reduced in the diametrical direction of the annular article 14, so that the inner diameter side end surfaces of the plurality of outer diameter restraining plates 17 embrace the outer periphery of the heated annular article 14.

Then, when the annular article 14 is cooled to around point Ms shown in FIG. 1 and reaches the minimum diameter dimension, the press head A is pressed with a predetermined pressure, and the numerous outer diameter restraining plates 17 are further reduced in diameter. An enveloping circle having the same diameter as the target diameter of the annular article 14 after heat treatment is formed on the inner diameter side end surface to form a constraining inner circumferential surface that has a predetermined roundness and cylindricity and is close to one continuous state. to restrain the outer peripheral surface of the annular article 14, and operate the pressurizing cylinder 12 to lower the pressurizing body 15,
The annular article 14 is pressed with a predetermined pressure between the pressurizing body 15 and the surface plate C so that the parallelism of both width surfaces of the annular article 14 becomes highly accurate.

After that, when the annular article 14 starts to expand, the inner peripheral surface for restraint of each outer diameter restraint plate 17 and the pressurizing body 1
At step 5, the annular article 14 is restrained from the outer diameter and axial direction, the press quench is completed, the coolant stops jetting out, and the press head A and chuck B finish pressing and rise.

Although the above embodiments have been explained using involute cams, the present invention is not limited to this, and can be implemented even with linear cams (liner cams), etc.; Although it is divided into parts, it may be an integral part or may be divided into parts other than three.

As explained above, the present invention includes a press head that is supported so as to be freely raised and lowered, and a press head that is integrally connected to the press head, is installed so as to be movable in the diametrical direction of an annular article, has an inclined surface on the inner periphery, and has a cam plate on the outer periphery. a plurality of sliders, a plurality of outer diameter restraining plates fitted so as to be slidable in the axial and diametrical directions of the annular article along the inclined surfaces of each slider, and constantly engaged with the cam plate of the slider; A chuck comprising a cam plate having a cam surface, an outer diameter restraining plate driving means for driving the cam plate to move the slider radially in the diametrical direction of the annular article, and a pressure body for pressing the annular article from above. , and a surface plate, which presses the outer diameter restraining plate in the axial direction of the annular article when the press head is lowered, and at the same time,
An annular article is clamped in the axial direction between the pressure body of the chuck and the surface of the surface plate, and has a predetermined roundness and cylindricity due to the envelope surface of the inner diameter side end surface of the plurality of outer diameter restraining plates. Since the inner diameter surface for constraint is formed in a nearly continuous state, the outer diameter of the annular article can be constrained with high precision during heating and rapid cooling. In addition, since the slider is movable in the diametrical direction (radial direction) and the diameter dimension that can be restrained can be adjusted arbitrarily and over a wide range, there is no need to replace the outer diameter restraining plate every time the type of annular article changes. There is no need for replacement work, and there is no need to prepare many types of outer diameter restraint plates.Therefore, it improves work efficiency and reduces the wear life of the chuck by replacing only the outer diameter restraint plates. Since only one step is required, the manufacturing cost of the entire device is low.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the quenching curve of steel, FIGS. 2 and 3 are longitudinal cross-sectional views of an apparatus for straightening the outer diameter of annular articles previously proposed by the applicant, and FIG. 4 is an apparatus according to the present invention. FIG. 5 is a plan view of the embodiment, and FIGS. 6 to 8 are taken along lines X-X and Y-
FIG. 9 is a longitudinal sectional view of the apparatus according to the invention with the press head at its lower end; A...Press head, B...Chick, C...
surface plate, 10... base plate, 12... pressure cylinder, 14... annular article, 15... pressure body,
17... Outer diameter restraint plate, 18... Slider, 22...
...Cam plate, 25... Fitting hole, 26... Guide plate, 30... Drive gear, 32
...Pulse motor, 33...Pinion, 34,3
5, 36...Involyutocam.

Claims (1)

[Claims] 1. A press head that is supported so as to be freely raised and lowered; a plurality of sliders that are integrally connected to the press head and are installed movably in the diametrical direction of the annular article and have an inclined surface on the inner periphery and a cam plate on the outer periphery; a plurality of outer diameter restraining plates fitted so as to be slidable in the axial and diametrical directions of the annular article along the inclined surface of each slider; a cam plate having a cam surface that constantly engages with the cam plate of the slider;
The chuck includes an outer diameter restraining plate driving means for driving the cam plate to move the slider radially in the diametrical direction of the annular article, a pressure body for pressing the annular article from above, and a surface plate, When the press head is lowered, the outer diameter restraining plate is pressed in the axial direction of the annular article, and at the same time, the annular article is clamped in the axial direction between the pressure body of the chuck and the surface of the surface plate, and the outer diameter restraining plates are pressed in the axial direction. 1. An outer diameter correction device for an annular article, characterized in that an envelope surface of an inner diameter side end face forms a restraining inner diameter surface having predetermined roundness and cylindricity that is close to one continuous state.