JPS62259752A - Method and device for precision grinding of cylindrical outer face - Google Patents

Abstract

PURPOSE:To easily obtain a highly accurate cylindrical stock without dispersion by inserting the ends of centers into a cylindrical stock from both sides of it and rotatably holding said stock, bringing a regulating wheel into contact with said stock, and grinding outer periphery by means of a grinding wheel with the inner peripheral face as a reference. CONSTITUTION:A cylindrical stock 1 is fed and placed onto a cradle 50 in between a regulating wheel 3 and a grinding wheel 2 from a feeding chute 48. The tips of centers 4, 4 are inserted from both sides in the axial direction of the stock 1 into the stock 1 to rotatably support the stock 1 and, then, the cradle 50 is lowered and said wheel 3 is brought into contact with the stock 1. Then, the grinding wheel 2 is brought into contact with the outer peripheral face of the stock 1, and the grinding of the outer periphery is carried out by means of difference in the rotating peripheral speeds between the wheel 3 and the grinding wheel 2. After that, the grinding wheel 2, the wheel 3, and centers 4 are separated off from the stock 1 and the released stock 1 is carried out of a discharge chute 49. By this method and device, a cylindrical stock 1 having a highly accurate concentricity can be easily obtained at a low cost.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a precision grinding method for a cylindrical outer surface and a grinding device therefor. The present invention relates to a precision grinding method for the outer surface of a cylindrical shape and a grinding apparatus thereof, which achieves extremely high precision and is particularly suitable for precision finishing of a small-diameter cylindrical body having a small inner diameter.

[Technical background of the invention and its problems] Conventionally, when precision finishing the inner and outer circumferences of small diameter cylindrical bodies such as guide rollers used in audio products, video products, etc., it has been necessary to check the concentricity of the inner and outer circumferences. Extremely high accuracy is required.

However, conventionally, precision finishing has been carried out using the following finishing methods, but each has its own drawbacks, and sufficient precision cannot be obtained.

In other words, in the 6 non-grinding method, a cylindrical material is placed on a blade between a grinding wheel and a regulating wheel, and the grinding wheel and regulating wheel are rotated in the same direction from both sides on the outer peripheral surface of the cylindrical material. The grinding wheel and regulating wheel are brought into contact with each other while rotating, and the difference in rotational peripheral speed between the grinding wheel and the regulating wheel is used to perform grinding. Therefore, since grinding follows the outer circumference of the cylindrical material, the difference in concentricity between the inner and outer diameters of the cylindrical material remains as a difference in concentricity after finishing, so it is not suitable as a machining method with high concentricity accuracy of the inner and outer circumferences. However, it was impossible to obtain sufficient accuracy for all products to be offered as products.

The internal grinding method is a method of grinding the inner periphery based on the cylindrical outer periphery. However, with this method, if the inner diameter is large to a certain extent, that is, if it is a large or medium-sized cylinder, it is possible to finish the concentricity of the inner and outer circumferences with general precision.
In the case of a small-diameter cylindrical body like the one mentioned above, since the inner diameter is very small, the grinding wheel and grinding wheel shaft must be made very small, which poses problems in terms of strength and rigidity. It was almost impossible to obtain small diameter cylindrical bodies.

Further, even for large and medium-sized cylinders, it is extremely difficult and almost impossible to make the concentricity deviation to a value close to O.

In the cylindrical grinding method, a mandrel with a center hole drilled at the center of both end faces is press-fitted into a cylinder, and this mandrel is pivoted at both centers and rotated, rotating around the outer circumferential surface of the cylinder. Grinding is done by bringing a whetstone into contact with the grinder. Therefore, although the concentricity of the inner and outer peripheries is finished with high precision, it is time-consuming and inefficient to attach (press-fit) and remove the mandrel. Furthermore, in the case of a small-diameter cylindrical body as described above, since the inner diameter is small, the mandrel also has a very small diameter, so the mandrel lacks rigidity, making it almost impossible. Furthermore, if the core metal itself had a deflection, the deflection itself had a negative effect on the concentricity.

Further, in the cutting finishing method using an automatic lathe, a cylindrical material is attached to the chuck of the automatic lathe, and both the inner and outer circumferences are finished and formed using a cutting tool. Therefore,
Once attached to the chuck, both the inner and outer peripheries can be finished, so concentricity with good accuracy can be obtained to a certain extent, but since it is finished with a cutting tool, it is not possible to machine highly hard materials. Moreover, in the case of small-diameter cylindrical bodies, the thickness of the boring tool used for finishing must be extremely thin, so there is a drawback that the deflection of the pilot hole due to drilling cannot be removed due to the lack of rigidity of the boring tool. there were.

Furthermore, the machining method using the so-called "open yatoi" method, in which the inner periphery of the cylindrical body is fixed by dividing a cylindrical object into multiple sides and allowing each side to move in the radial direction, is It was almost impossible to bring the concentricity of the inner and outer circumferences to a value close to O because of the addition of the wobbling and the center play due to the fixation of the cylindrical body. In addition, tightening the opening groove requires time and effort to untighten, making it unsuitable for homemade production.Furthermore, in the case of small-diameter cylindrical bodies, the inner diameter is small, so the rigidity of the opening groove itself is insufficient, making it difficult to achieve a high-precision finish. was impossible.

In this way, conventional finishing methods can provide highly accurate concentricity, if not satisfactory, for cylindrical objects with relatively large inner and outer diameters, but in the case of products such as the small-diameter cylindrical objects mentioned above, Now that such products are being used in large numbers, it has been desired to develop a process and an apparatus for finishing the concentricity of the inner and outer circumferences with extremely high precision.

[Purpose of the Invention] Therefore, in view of the above-mentioned drawbacks, the present invention aims to finish the concentricity of the inner and outer circumferences of even small-diameter cylindrical bodies with extremely high precision, and to make it possible for anyone to carry out the finishing work. It was created with the aim of making it easy and quick.

[Summary of the Invention 1 In order to achieve the purpose of creating a ridge, the precision grinding method for a cylindrical outer surface according to the present invention includes supplying and arranging a cylindrical material to a grinding position between a grinding wheel and a regulating wheel, next,
The center tip is inserted into this cylindrical material from both sides in the axial direction, and the outer surface of this cylindrical material is ground by the difference in rotational peripheral speed between a grinding wheel and a regulating wheel. The grinding device consists of a cylindrical body grinder that grinds the outer surface of a cylindrical material placed at a grinding position between a rotating grinding wheel and a regulating wheel, and a grinding wheel and a regulating wheel. A center that supports the cylindrical material by inserting its tips from both sides in the axial direction into the cylindrical material placed at the grinding position between the centers, and a regulating wheel is placed on the cylindrical material after the center has completed the axial support. two interlocking cams that actuate the center and the regulating wheel so that they are brought into contact with each other and the regulating wheel is separated from the cylindrical material after the outer surface of the cylindrical material has been ground and the center is removed from the rear cylindrical material; It consists in that it was constructed from.

[Embodiments of the Invention] The present invention will be described in detail below with reference to FIGS. 1 to 13.

That is, the precision grinding method for the cylindrical outer surface is first carried out using a cylindrical outer surface grinding device that performs grinding by the difference in rotational peripheral speed between the grinding wheel 2 and the regulating wheel 3. A cylindrical material 1 is arranged at a grinding position between a grinding wheel 2 and a regulating wheel 3.

This cylindrical material 1 is used, for example, as a tape guide roller for video equipment, and its dimensions are, for example, an outer diameter of about 7M1 and an inner diameter of 2#IPi! It is cylindrical with a small diameter.

As shown in FIG.
1, and the tip of its center 4 is inserted into the cylindrical material 1 to be pivotally supported.

Thereafter, the regulating wheel 3 is brought into contact with the outer peripheral surface of the cylindrical material 1, and further thereafter, as shown in FIG. 2, the grinding wheel 2 is brought into contact with the regulating wheel 3 from the opposite side. The regulating wheel 3 is rotated together, and the outer circumferential surface of the cylindrical material 1 is precisely ground by the difference in circumferential speed between the grinding wheel 2 and the regulating wheel 3.

In this case, as shown in FIG. 7(C), the cylindrical material 1 has chamfered surfaces 29 concentric with the inner periphery at both open ends of the inner periphery.
Form it.

As shown in FIG. 7(A), this chamfered surface 29 has a guide pin 24 at its tip that can be inserted into the inner circumference of the cylindrical material 1 without play, and has a tapered shape. By further pressing the pressure chamfering tool 25 having the pressure contact surface 26 at the base of the guide pin 24 with the guide pin 24 fitted into the inner periphery of the cylindrical material 1, the corner of the opening end is pressed with the pressure contact surface 26. Crush and form.

In addition, as shown in FIG. 7(B), a guide pin 24 is provided at the tip, which can be inserted into the inner circumference of the cylindrical material 1 without play, and a tapered cutting edge is provided at the base of the guide pin 24. The chamfer surface 29 may be formed by a chamfering tool 27 with a cutting edge. In this case, after the guide pin 24 is inserted into the cylindrical material 1, the chamfering tool 27 with a cutting edge is rotated to cut and chamfer the corner of the opening end.

The cylindrical material 1 chamfered in this way is shown in Fig. 8 (A>
As shown, the tapered surface 4d of the tapered center 4a
It is pivoted by. In addition, even if the two chamfered surfaces are not formed on the cylindrical material 1 as described above, it is possible to fit the cylindrical material 1 into the inner circumference without play, as shown in FIGS. 8(B) and 8(C). It goes without saying that the guide pin-equipped taper center 4b having the guide pin 4e at the tip or the guide pin center 40 can be used for the pivot support, so it goes without saying that the pivot support can be achieved using this method. Although not shown, even if the cylindrical material 1 has two chamfered surfaces, it can be supported more reliably by using the guide pin-equipped taper center 4b.

The guide pin-equipped tapered center 4b has a shape with a tapered surface at the base of the guide pin, and the guide pin center 4C has a shape in which a guide pin is implanted at the center of the end face of a cylinder.

On the other hand, as shown in FIG. 3, the cylindrical external surface grinding device for grinding in this manner includes a cylindrical material support device 6 which is fixed at the base 5 and a grinding wheel 2 which is driven and rotated. It consists of.

As shown in FIGS. 3 to 6, the cylindrical material support device 6 includes a support rod 8 whose base end is rotatably supported by a shaft support 7 on a base 5, and is attached to the tip of the support rod 8. The regulating wheel 3 is rotatably supported by the bearing 9 and moves away from and approaches the grinding wheel 2 by rotation of the support rod 8, and the regulating wheel 3 and the grinding wheel 3. 2, an interlocking cam 10 for operating the centers 4, 4 and the regulating wheel 3, respectively, and a universal joint 11 for driving and rotating the regulating wheel 3. The motor 13 is connected to the rotating shaft 12 of the regulating wheel 3 via the regulating wheel 3.

The bearing 9 is made so that it is approximately perpendicular to the support rod 8 in the opposite direction of the grinding wheel 2, that is, it is horizontal to the front side!
11WA14 is implanted, and this operating arm 14
A coil spring 30 mounted substantially perpendicularly to the base 5 is brought into contact with the lower surface of the base 5 with its upward force adjustable by a screw 31, and the elastic force of the coil spring 30 pushes up the actuating arm 14 to form a regulating wheel. 3 is constantly pressed to rotate it toward the grinding wheel 2 side.

On the other hand, the two centers 4.4 are arranged between the grinding wheel 2 and the regulating wheel 3 with their tips facing each other on the same axis, and these centers 4.4 slide against each other on the axis. It is formed freely.

That is, the two centers 4, 4 are held by two sliding support rods 15 erected on the base 5 so as to be able to slide on the same axis. And this center 4.
As described above, the centers 4.4 are arranged so that their tips face each other, and the centers 4.4 are formed so that they are pressed in the direction in which the centers 4.4 approach each other by the center pushing rod 16, which will be described later. ing.

By pressing the centers 4, 4, for example, although not shown, a vertical notch is formed in the side surface of the intermediate portion of the center 4, 4, and one vertical surface within this notch is made into a slope. On the other hand, the center push rod 16 is inserted into each of the notches so as to slide, and the surface of the center push rod 16 that faces the slope is formed into a parallel slope, and while the slopes are in contact with each other, the center The center 4.4 is configured to move horizontally by pushing the pushing rod 16 in the vertical direction. The horizontal movement of the center 4.4 is achieved by moving the center pushing rod 16 downward to bring the centers 4, 4 closer to each other, and by moving the center pushing rod 16 upward to reduce the pressure of the center pushing rod 16. When released, the centers 4 are formed so as to be separated from each other by a spring or the like.

Further, a cam board 17 is provided upright on the base 5, and the interlocking cam 10 is pivotally supported on this cam board 17.

The interlocking cam 10 is configured such that the regulating wheel operating cam 10a and the center operating cam 10b are connected by a connecting shaft 10c so that they work together, and the connecting shaft 10c is passed through a cam base plate 17 to be pivotally supported and operate the regulating wheel. A cam 10a and a center operating cam 10b are arranged on both sides of a cam base plate 17.

On the other hand, on the cam base plate 17, a lever rod 18 is rotatably supported at its substantially middle portion, and the lever rod 18 is arranged with the supported portion serving as a fulcrum 19. Two center push rods 16 are fixed to the tips of the lever rods 18.

A coil spring 20 is attached to the lower part of the front side of the lever 18, and the tip of the lever 18 is always pulled upward by a tensile force.

Further, a center operating cam 10b is brought into contact with the lower surface of the near end of the lever 18, and a regulating wheel operating cam 10a is brought into contact with the upper surface of the near end of the operating arm 14. put. These cams 10a, 1
0b are formed so that they can be rotated together by a cam lever 21.

By rotating this cam lever 21 approximately 90 degrees in one direction, the center pushing rod 16 moves the center 4.4.
The lever 18 is swung to press downward so that they approach each other, and the support rod 8 is rotated by the operating arm 14 to move the regulating wheel 3 toward the grinding wheel 2. Further, by rotating the cam lever 21 approximately 90' to return the cam lever 21 in the opposite direction, the supporting rod 8 is rotated by the operating arm 14 in order to move the regulating wheel 3 away from the grinding wheel 2, and the center The lever rod 18 is swung to release the pressure on the center 4.4 by the push rod 16.

In this case, as described above, the interlocking cam 10 is used to press the center 4° 4 with the center push rod 16 and move the regulating wheel 3, but only one cam lever 21 is operated. regulating wheel operating cam 1 to be operated respectively by
0a, the ridges 22 and 23 of the center operating cam 10b are placed at appropriate positions.

That is, as shown in FIG. 4, the center pushing rod 16 presses the center 4.4, and the regulating wheel 3 moves toward the grinding wheel 2, thereby pushing the center 4.4.
When it comes into contact with the cylindrical body 1 which is pivotally supported by 4,
For example, when the cam lever 21 is tilted sideways, the ridge 23 of the center operating cam 10b engages the lever 18 and pushes up the front end of the lever 18, and then the ridge 22 of the regulating wheel operating cam 10a is activated and the bowl 14 The winter piles 22 and 23 are set so that the regulating wheel 3 comes into contact with the cylindrical material 1 as the wheels come off.

Moreover, as shown in FIG. 6, when the cam lever 21 is returned to the vertical position, the regulating wheel operating cam 10a
The crest 22 of the center actuating cam 10b comes off the lever 18 and separates the regulating wheel 3 from the cylindrical material 1, and then the ridge 23 of the center actuating cam 10b comes off the lever 18.
The winter mountains 22 and 23 are set so that the front end of the center 4.4 is lowered to release the center 4.4 from the center pushing rod 16.

Therefore, by simply operating the cam lever 21 with one hand, the center 4.4 and the regulating wheel 3 can be operated simultaneously.

Since the cylindrical material 1 whose outer periphery has been ground in this way is supported by the center 4.4 inserted into the cylindrical material 1,
The centers 4, 4 come into contact with the inner periphery of the cylindrical material 1, and the cylindrical material 1 rotates around the inner periphery. Therefore, even if the concentricity between the outer circumference and the inner circumference deviates during pre-processing, the cylindrical material 1 will not be ground following the outer circumference, but will be ground based on the inner circumference, and the concentricity between the inner circumference and the outer circumference will be extremely high. Accuracy can be.

Next, an automatic cylindrical outer surface grinding apparatus that performs the above-described grinding as a continuous series of steps will be described below.

As shown in FIG. 9, in this device, a grindstone cutting slide 42 is placed on a frame 4° via a slide receiving plate 41, and a grindstone mount 43 and a grindstone drive motor 44 are placed thereon. . Also, a table 45 for traversing is placed on the frame 40, and a base 5 on this table 45 is placed.
The outer sheath M6 of the cylindrical material 1 is attached to the cylindrical material 1. The grinding wheel 2, which is covered more than half by a grinding wheel cover 46, is rotatably mounted on the grinding wheel mount 43, and is driven and rotated by a grinding wheel drive motor 44, and the cutting amount by the grinding wheel 2 is controlled by a positioning handle 47. Configured to adjust.

Further, a supply chute 48 is disposed above the pivot point supported by the center 4.degree. 4 in the cylindrical material support device 6, and four discharge chutes are disposed below the clamping portion.

As shown in FIGS. 10 and 13, a pedestal 50 is disposed below the shaft support position to receive and place the cylindrical material 1 supplied from the supply chute 48 at the appropriate grinding position. It is formed so that it rises so as to hold it in place, while the other parts are formed so that it retracts downward.

The process of grinding the outer periphery of the cylindrical material 1 using this device will be described below. First, as shown in FIG.
A pedestal 50 is used to place and hold the cylindrical material 1 at the appropriate position for grinding.
rises and stops between the centers 4 and 4. Then, the stopper bin 51 is retracted from within the supply chute 48 to place one cylindrical material 1 on the pedestal 50.

Next, as shown in FIG. 11, the center pushing rod 16 is lowered to bring the centers 4, 4 closer together, and the cylindrical material 1
is pivoted. Thereafter, as shown in FIGS. 12 and 13, the pedestal 50 is pulled downward and the regulating wheel 3 is brought into contact with the cylindrical material 1. Furthermore, the grinding wheel 2 is then advanced to come into contact with the outer peripheral surface of the cylindrical material 1 to perform finish grinding.

After grinding the outer circumferential surface of the cylindrical material 1, the grinding wheel 2 and the regulating wheel 3 are separated from the cylindrical material 1, and then the center pushing rod 16 is moved upward to remove the center 4.
4 are separated from each other, the cylindrical material 1 is released from the shaft support, and is carried out by the 4 discharge chutes. In this case, the four discharge chutes are retracted downward when they are not needed.

Then, the pedestal 50 is raised again, and the stopper bin 51 is
The cylindrical material 1 is pulled in from the supply chute 48 to the pedestal 50.
The above-mentioned process is repeated again to continuously grind the cylindrical materials 1 one by one.

At this time, the pedestal 50 appears and disappears, the discharge chute 49 appears and disappears,
In addition, the movement of the regulating wheel 3, the rotation of the interlocking cam 10 that operates the centers 4, 4, the movement of the grinding wheel 2, etc. are all controlled by servo motors, hydraulic or pneumatic cylinders, solenoid valves, and other switches (both shown in the figure). (not shown), etc., and these are controlled by a control device (not shown) to perform the operations as described above.

The cylindrical material 1 whose outer peripheral surface has been ground partially manually or fully automatically in this manner is used, for example, as a guide roller of a video jar. Although not shown, in this guide roller, a cylindrical material 1 is fitted onto a roller shaft, and the position of the cylindrical material 1 is set by a fixed flange and held rotatably.

Therefore, if the accuracy of concentricity is poor, rotational blur will occur, which will have a negative impact on video recording, playback, etc., so concentricity should be
High accuracy of units is required.

However, if the cylindrical material 1 is ground as described above, the concentricity runout can be suppressed to approximately O, and the cylindrical material 1 can be provided with a precision that can sufficiently satisfy the requirement for high precision in μ units. be able to.

[Effects of the Invention] In the precision grinding method for a cylindrical outer surface according to the invention configured as described above, the cylindrical material 1 is supplied and arranged at the grinding position between the grinding wheel 2 and the regulating wheel 3, and the following steps are performed. Then, the tips of the centers 4 and 4 are inserted into the cylindrical material 1 from both sides in the 1-axis direction and supported, and the cylindrical material 1 is rotated by the difference in rotational circumferential speed between the grinding wheel 2 and the regulating wheel 3. By grinding the outer surface, the tip of the center 4.4 is inserted into the cylindrical material 1 and the cylindrical material 1 is pivotally supported, so the inner circumferential surface is referenced instead of being ground along the outer circumference of the cylindrical material 1. It is possible to obtain high precision concentricity by grinding. In addition, the cylindrical material 1 during grinding can maintain a stable grinding state without wobbling, and the finished surface of the grinding surface is very good, making it possible to provide a high-quality product. The most significant effect is that it has become possible to easily finish a small-diameter cylindrical shape with concentricity close to O, which was almost impossible in the past, with very simple work.

Further, the device used in the above precision grinding method is also a cylindrical grinding wheel 2 that grinds the outer surface of a cylindrical material 1 placed at a grinding position between the rotating grinding wheel 2 and the regulating wheel 3 based on the difference in rotational circumferential speed between them. A center 4 that supports the cylindrical material by inserting its tips from both sides in the axial direction into the cylindrical material 1 placed at the grinding position between the body grinder, the grinding wheel 2 and the regulating wheel 3. 4, and after the center 4° 4 completes the pivoting, the regulating wheel 3 is brought into contact with the cylindrical material 1, and after the external surface grinding of the cylindrical material 1 is completed, the regulating wheel 3 is separated from the cylindrical material 1. Since it is composed of two interlocking cams 10 that actuate the center 4.4 and the regulating wheel 3 to remove the center 4.4 from the cylindrical material 1, the structure is simple, so it has not been used conventionally. Since it can be formed by improving the grinding machine, etc., the equipment investment is also low.

Since the center 4.4 and the regulating wheel 3 are operated by the interlocking cam 10, even if it is done manually, it can be done with one touch, which is very convenient for automation. Moreover, if the operation of the grinding wheel 2 and regulating wheel 3, the pivoting of the cylindrical material 1 by the centers 4, 4, and the operation of the interlocking cam 10 in this device are all controlled by the control device, almost no human effort is required. Since external surface grinding can be performed for automatic fishing, costs can be reduced.

As explained above, according to the present invention, it is possible to easily and inexpensively perform finish outer grinding to bring the concentricity of the inner and outer circumferences of a small-diameter cylinder body to a value close to 0, which was almost impossible in the past. This grinding method is fully capable of grinding large-diameter objects, requires little capital investment, does not require skilled workers, and provides high-precision grinding with no variation in accuracy. It can be used by anyone and has a variety of amazing effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a perspective process diagram when the center is fixed, Fig. 2 is a plan view when grinding the outer periphery of a cylindrical material, and Fig. 3 shows the main components of the cylindrical outer surface grinding device. FIG. 4 is a front view with the motor removed, FIG. 5 is a plan view, FIG. 6 is a front view when the regulating wheel is separated from the cylindrical material, and FIG. The figure is a cross-sectional view showing how taper chamfering is formed on a cylindrical material.
Fig. 8 is a cross-sectional view showing how the cylindrical material is supported by the center, Fig. 9 is a front view of the automatic cylindrical outer surface grinding device, and Figs. 10 to 13 are schematic process diagrams during automatic grinding. . 1... Cylindrical material, 2... Grinding wheel, 3... Regulating wheel, 4... Center, 4a...
Tapered center, 4b...Tapered center with guide pin, 4C...Guide pin center, 4d...Tapered surface, 4e...Guide pin, 5...Base, 6...
... Cylindrical material support device, 7... Shaft support, 8... Support rod, 9... Bearing, 10... Interlocking cam, 10a...
Regulating wheel operating cam, 10b... Center operating cam, 10C... Connection shaft, 11... Universal joint, 12... Rotating shaft, 13... Motor, 14... Operating arm, 15 ...j behavior support rod,
16... Center push rod, 17... Cam board, 18
...Rice lever, 19...Fully point, 20...Coil spring, 21...Cam lever, 22...Mountain, 23.
... Mountain, 24 ... Guide pin, 25 ... Pressure contact chamfering tool, 26 ... Pressure contact surface, 27 ... Chamfering tool with cutting blade, 28 ... Cutting blade, two ... Chamfer surface , 30...
Coil spring, 31...screw, 4o...frame, 41...slide receiving plate, 42...
... Grindstone cutting slide, 43 ... Grindstone mounting stand, 44
... Grinding wheel drive motor, 45... Table, 46.
...Whetstone cover, 47...Positioning handle, 48.
... Supply chute, 49... Discharge chute, 50...
- cradle, 51...stopper bin. Patent applicant: Sanwa Needle Bearing Co., Ltd. Figure 7 (B) (C) Figure 8 (A) (C) Figure 11 @ Figure 12 Figure 13

Claims (1)

[Claims] 1. A cylindrical material is supplied and arranged at a grinding position between a grinding wheel and a regulating wheel, and then the center tip is inserted into the cylindrical material from both sides in the axial direction. A precision grinding method for the outer surface of a cylindrical material, which is characterized by inserting and supporting the cylindrical material, and grinding the outer surface of this cylindrical material using the difference in peripheral speed of rotation between a grinding wheel and a regulating wheel. 2. The cylindrical material is prepared by using a taper chamfering tool with a guide pin at the tip that can be inserted into the cylindrical material without any play.A center receptacle that is concentric with the inner periphery of the cylindrical material is prepared in advance at both open ends of the cylindrical material. A precision grinding method for a cylindrical outer surface according to claim 1, wherein the cylindrical outer surface is provided with a tapered chamfer and is pivotally supported by the tapered surface and the taper center. 3. The cylindrical outer surface according to claim 1 or 2, wherein the cylindrical material is pivotally supported by inserting a center having a guide pin at its tip that can be inserted into the material without play. Precision grinding method. 4. The contact of the regulating wheel to the cylindrical material and the insertion of the tip of the center into the cylindrical material involve two interlocking cams that bring the regulating wheel into contact with the cylindrical material after the center is inserted. According to claim 1, 2 or 3, the center is removed from the cylindrical material after the regulating wheel is separated from the cylindrical material after the outer surface grinding is completed. Precision grinding method for cylindrical outer surface. 5. Supplying the cylindrical material to the grinding position between the grinding wheel and regulating wheel, inserting the center into the cylindrical material supplied and placed at the grinding position, and rotating the grinding wheel and regulating wheel. The scope of the patent claim 1, in which the operations of grinding the outer surface of a cylindrical material using a peripheral speed difference, removing the center from the cylindrical material after grinding the outer surface, and discharging the cylindrical material are performed in a series of sequential automatic processes. The precision grinding method for a cylindrical outer surface according to item 1, item 2, item 3, or item 4. 6. A cylindrical body grinder that grinds the outer surface of a cylindrical material placed at a grinding position between a rotating grinding wheel and a regulating wheel by using a difference in rotational circumferential speed between the rotating grinding wheel and a regulating wheel; A center that pivotally supports the cylindrical material by inserting its tips from both sides in the axial direction into the cylindrical material placed at the grinding position in between, and a regulating wheel that contacts the cylindrical material after the center has completed the axial support. It consists of two interlocking cams that operate the center and the regulating wheel to separate the regulating wheel from the cylindrical material and remove the center from the rear cylindrical material after the outer surface grinding of the cylindrical material is completed. Precision grinding equipment for cylindrical outer surfaces. 7. The cylindrical material was formed in advance by forming a taper chamfer for center receiving concentrically with the inner periphery on both open ends, and by bringing the taper center into contact with the tapered chamfered surface, the cylindrical material was pivotally supported. A precision grinding device for a cylindrical outer surface according to claim 6. 8. The precision grinding device for a cylindrical outer surface according to claim 6 or 7, wherein the center has a guide pin at the tip that can be inserted into the cylindrical material without play. 9. The cylindrical body grinder, center, and interlocking cam sequentially place the cylindrical materials supplied one by one from the supply chute to the grinding position and pivotally support them by the center, and then apply a regulating wheel and an interlocking cam to the cylindrical materials. The grinding wheel is brought into contact to perform external grinding, and after the grinding is completed, the grinding wheel and regulating wheel are separated from the cylindrical material, the center is removed from the cylindrical material, and the cylindrical material is discharged from the discharge chute. A precision grinding device for a cylindrical outer surface according to claim 6, 7 or 8, which is controlled by a control device to perform the operation automatically.