JPH09192959A - A method for suppressing chattering of a cylindrical work by a lathe, and an apparatus used for the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To mechanically prevent chattering of a workpiece so that the peripheral surface of a cylindrical workpiece can be processed accurately, with good quality, efficiently and safely. [Constitution] When a cylindrical work w whose one end is grasped by a chuck 1 and the other end is supported by a centering means 2 is specified, a work peripheral surface having a dimension of 2/5 to 1/3 of the total length of the work is specified from the chuck side. A support wheel 1 having an outer peripheral portion formed of a rubber material at a point p1
7 is kept pressed with an appropriate pressing force, and on the other hand, the peripheral contact point p2 in the diametrical direction of the work, which is opposite to the specific position, has a relatively small sliding contact resistance with respect to the work and has appropriate elasticity and flexibility. While pressing the sliding contact material 33 such as a nylon woven cloth that is provided with an appropriate pressing force,
The sliding contact material is fed and moved integrally with the cutting tool 24 located near the sliding contact material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chattering suppressing method for a cylindrical work by a lathe, and an apparatus used for the chattering suppressing processing.

[0002]

2. Description of the Related Art A wallpaper cloth is attached to one side of a cloth by using a pasting machine for pasting it on a wall surface, and this pasting machine is equipped with an elongated cylindrical gluing roll. The roll is rotated by a motor, and the glue adhered to the peripheral surface of the roll is evenly applied to the cloth.

However, this gluing roll processes the peripheral surface of a cylindrical product (workpiece) made of stainless steel with a lathe, and in this case, the work size has, for example, a total length of about 1076.
mm, outer diameter is approximately 88 mm, and inner diameter is approximately 80 mm
Is made.

When machining this work, one end is grasped by a chuck and the other end is rotated while being supported by a centering means. During this rotation, the peripheral surface skin is cut and the diameter is about 86.5 mm. After that, a spiral groove with a depth of about 0.75 mm and a pitch of about 1 mm is formed on the entire length of the peripheral surface, and finally the outermost diameter part of the entire peripheral surface is thinly cut with a flat cutting tool It should be finished to about 86 mm.

In such processing, since the thickness of the work is relatively thin compared to the overall shape of the work, chatter that cannot be overlooked in the work is generated in the rotation of the work.
On the other hand, if no measures are taken, a striped pattern is formed on the finished surface due to uneven processing, and the finished product thus produced must be discarded as a defective product.

In order to avoid this, it is necessary to prevent chattering in the work. Therefore, conventionally, during rotary cutting of the work, the worker wears work gloves with the hand on which the work peripheral surface portion near the cutting tool is attached. I try to grasp with a proper force.

According to this, vibration and whirling of the work are suppressed, and chattering which is harmful to the work is not generated. Therefore, the work is smoothly and uniformly cut, and a good quality product is obtained.

[0008]

In the above-described conventional method for processing the gluing roll, chattering of the work is suppressed by direct manual processing, so that not only efficient processing cannot be expected but also the hand is caught in the rotating work. There is a risk of serious accidents such as getting your hands caught or caught in the blade with a cutting tool.

The present invention mainly addresses such a problem, namely, to efficiently and efficiently cut the peripheral surface of an elongated thin cylindrical work such as a gluing roll. To aim.

[0010]

In order to achieve the above object, in the processing method according to the present invention, the chucks are arranged so as to face each other with the center line of rotation of the chuck interposed therebetween, and at an arbitrary position near the center line of rotation. One of a pair of movable saddles has a cylindrical shape grasped by the chuck, at least a pair of supporting wheels whose outer periphery is made of a rubber material and is rotatable along the rotation surface of the chuck. It is mounted so as to be pressed with a suitable elasticity at a specific position p1 in the circumferential direction on the peripheral surface of the work,
The other one is equipped with a cutting tool for cutting the peripheral surface of the work, and a nylon woven fabric having appropriate elasticity and flexibility with a relatively small sliding contact resistance to the work in the vicinity of the cutting tool. The sliding contact material such as cloth is mounted on the peripheral surface of the work so as to be pressed with a suitable elasticity at a specific position p2 opposite to the specific position p1 of the supporting wheel pressed.

Specifically, during rotation of a cylindrical work whose one end is grasped by a chuck and the other end is supported by core pushing means,
While maintaining a state in which the supporting ring is pressed from the chuck side to the specific position p1 of the work peripheral surface at a position of about 2/5 to 1/3 of the total length of the work with an appropriate pressing force through the elastic support means, on the other hand, The work peripheral surface specific portion p1 in the diameter direction
The sliding contact material is pressed by a proper pressing force to the work peripheral surface specific portion p2 on the side opposite to it through another elastic pressure supporting means, and the sliding contact material is fed together with the cutting tool located in the vicinity thereof. Try to move.

To carry out the above invention, the following support wheel pressing device and sliding contact member pressing device are used.

That is, in the support wheel pressing device, a support guide member that is urged by an appropriate elastic force toward the work peripheral surface specific portion p1 is attached to a base member fixed to the saddle, and this support guide is provided. The support plate is fixed to the tip of the member, and two support wheels whose outer peripheral portion is made of a rubber material are positioned on the upper surface of the support plate so as to be arranged in the front-rear direction in the circumferential direction of the work and both At the same time, it is attached so as to come into contact with the work peripheral surface and rotate in the work peripheral direction.

Further, in the sliding contact member pressing device, a support guide member which is urged by an appropriate elastic force toward a work peripheral surface specific portion p2 is attached to a base member fixed to the saddle body,
A pressing body having an arcuate surface that abuts on the peripheral surface of the work is fixed to the tip portion of the support guide member, and the arcuate surface has a relatively small sliding contact resistance to the work and has appropriate elasticity and flexibility. It is assumed that the sliding contact material such as nylon woven cloth is applied.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a state in which the present invention is carried out on an NC lathe, in which 1 is a chuck,
Reference numeral 2 is a core pushing means.

The saddles 3a and 3b are both guided and supported by the body frame of the lathe. The saddles 3a and 3b are arranged so as to face each other with the rotation center line of the chuck 1 interposed therebetween, and move to an arbitrary position near the rotation center line. It is possible.

In such NC lathe, one saddle 3
A pair of support wheel pressing devices 4 and 4 are attached to a, and one support wheel pressing device 4 will be described in detail with reference to FIGS. 2 to 4. Here, FIG. 2 shows a device according to the present invention, and is a front view with a part in section, FIG.
Is a cross-sectional side view showing the device according to the present invention, and FIG. 4 is a perspective view showing the usage state of the support wheel pressing device 4.

That is, as shown in these figures, the saddle 3a
A base member 6 which is bolted to a specific tool mounting location of a tool rest 5 mounted so as to be rotationally displaceable is formed, and a stepped guide hole 6a is provided therein. This guide hole 6a
A support guide member 7 in which an enlarged portion 7a for slipping out regulation is formed is fitted in and a spring 8 is mounted behind this, and the rear end of the spring 8 is supported by a spring pusher 9. The spring push 9 is screwed to the lid member 10 fixed to the base member 6 so that the position change in a specific direction can be adjusted.

A rectangular support plate 11 is fixed to the tip of the support guide member 7, and a guide rod for restricting rotational displacement of the support plate 11 around the support guide member 7 is provided on the lower surface of the support plate 11. Screw 12 downwards. The guide rod 12 is inserted into a hole 6b formed in the base member 6 and can be displaced only in a specific direction f1 by the guiding action of a guide lid 13 fixed to the opening portion of the hole 6b.

On the upper surface of the support plate 11, a ridge 11a is provided in the longitudinal direction at the center of the width, and a pair of hook-shaped support members 14, 14 in which a groove into which the ridge 11a is fitted are formed. These are fastened so that they can be fixed at arbitrary positions in the longitudinal direction of the support plate 11 through the long holes 11b provided in the support plate 11 and the bolts 15 inserted into the long holes 11b.

A support shaft 16 is fixed to each hook-shaped support member 14, and a support wheel 17 is mounted along the support shaft 17 along the rotation surface of the chuck 1. The outer periphery of the support wheel 17 is made of a rubber material containing a resin material.

In the figure, 18 is a ball bearing, 19 is a rim member, 20 is a lid member fixed to the support shaft 16, 21 is a seal member, 22 is a lock nut, 23 is an air ejection pipe, and a support guide member. 7 and spring 8 are supporting wheels 1
7 constitutes the elastic pressure supporting means.

However, the other saddle 3b is equipped with the cutting tool and the sliding contact member pressing device 25, and its concrete structure will be described below with reference to FIG. 5 in addition to the previous figures. . FIG. 5 is a perspective view showing the sliding contact member pressing device.

That is, each of the blade mounting members provided on the tool rest 26 mounted on the saddle 3b is provided with a blade tool 24 for threading having a blade edge of 120 degrees and an unillustrated blade tool having a flat blade edge. It is fastened with a bolt to any one of the recessed portions 27a of 27.

The sliding contact member pressing device 25 is similarly positioned in the vicinity of the cutting tool 24 for thread cutting and the cutting tool having a flat cutting edge, respectively.
The specific configuration of is as follows.

That is, as shown in FIGS. 2, 3 and 5, a base member 28 is formed which is fixed to the blade mounting member 27 by bolts, and a base member 28 is formed at a central portion thereof in a specific direction f1. A small diameter stepped hole 28a is provided, and this hole 28a
Guide holes 28b having a relatively large diameter and directed in the same direction f1 are provided on both sides of the guide hole 28b.

A tubular support guide member 29 is fitted into each of the guide holes 28b, and a spring 30 is inserted into the inner hole of the guide hole 28b. One end of the spring 30 is supported on the bottom surface of the guide hole 28b and the other end thereof is supported. Is brought into contact with the top surface of the inner hole so that the support guide member 29 is urged downward by the elasticity of the spring 30. Then, the bolt 31 is loosely inserted into the other hole 28a in a state where the bolt 31 is prevented from coming out.

The tip of the support guide member 29 and the bolt 3
A pressing body 32 having an arcuate surface 32a is screwed onto the tip of No. 1, and the arcuate surface 32a has a relatively small sliding contact resistance with respect to the work w and has a proper elasticity and flexibility. A sliding contact material 33 such as cloth is applied. The sliding contact member 33 has a thickness of about 4 to 5 mm, a width of about 25 mm, and a length of about 60 to 100 mm.

In the figure, numeral 34 is a seal member, numeral 35 is a metal fitting, numeral 36 is an air ejection tube, and the support guide member 29, spring 30, etc. constitute the elastic pressure supporting means for the sliding contact member 33.

After preparing as described above, the chuck 1 grasps one end of the work w having the same size as the conventional example,
The other end is supported by the core pushing means 2, and after the necessary information is input from a control information input device (not shown), the machining of the work w is automatically started by turning on the start switch.

As a result, the work w is rotated and the support wheel pressing devices 4 and 4 are moved in the same direction as the one saddle 3a in the rotational direction of the chuck 1 so that all the support wheels 17 and
·············································································································· , Two support wheels 17 of each support wheel pressing device 4,
17 is pressed against the specific point p1 by an appropriate amount of elastic force generated by compression of the spring 8.

At this time, the work w is likely to be chattered due to radial deformation due to its rotation and vibration caused by this deformation, but the support wheel 17 at the specific position p1.
Suppresses this very effectively, and the rubber material of the support wheel 17 also contributes to effective suppression of chattering, and the work w
The chattering that adversely affects the processing of does not occur.

On the one hand, a specific tool attached to the tool rest 26 is indexed and moved to the cutting start position in the same body as the other saddle 3b, and the support wheels 17 ... Press the peripheral surface of the work w. The entire length of the peripheral surface of the workpiece w is cut below, and the peripheral surface of the workpiece w is accurately machined, and the diameter thereof is set to about 86.5 mm.

Subsequently, if necessary, another cutting tool is indexed and moved to appropriate positions in the lengthwise direction of the work w circumferential surface, and also appropriately moved toward the work w circumferential surface to form a ring having a relatively large cross section. A groove or the like is formed.

After that, the cutting tool 24 for thread cutting is indexed and moved to the cutting start position, and at the same time, the cutting tool 2 is cut.
The sliding contact material 33 in the vicinity of 4 is also moved integrally, and subsequently the cutting tool 2
4 and the sliding contact member 33 are moved together with the cutting tool base 26 toward the peripheral surface of the work w by an appropriate distance, whereby the cutting edge of the cutting tool 24 has a depth of about 0.75 mm on the peripheral surface of the work w.
And the sliding contact member 33 is compressed by the springs 30 and 30 with an appropriate amount of elastic force so that the pressing member 3 is pressed.
2 through the specific position p2 on the peripheral surface of the workpiece w near the cutting tool 24
Will be pressed. Therefore, the cutting tool 24 starts cutting, and a spiral groove having a depth of about 0.75 mm and a pitch of about 1 mm is formed on the entire length of the peripheral surface of the work w.

At this time, since the work w is rotated while being made thinner than it was originally, the work w is likely to be chattered due to the radial displacement and the vibration caused by this displacement. However, the supporting wheels 17 ... Press the specific position p1 on the peripheral surface of the work w with an appropriate elasticity, and the sliding contact material 33 also appropriately applies the peripheral surface part p2 facing the specific position p1 in the radial direction of the work w. Since it is pressed with sufficient elasticity, the work w chattering is suppressed more effectively than in the case where only the support wheels 17 are pressed, so that the spiral groove has an extremely accurate size and shape. .

Finally, a not-shown cutting tool having a flat cutting edge is indexed and moved to the cutting start position in a body with the tool rest 26, and the outermost part of the entire circumference of the work is thinly cut. The support wheel 17 and the sliding contact member 33 are pressed against the peripheral surface of the work w and function in the same manner as in the case of cutting the spiral groove. Therefore, the peripheral surface of the work w is also accurately cut, and the final diameter is about 86 mm.

When the processing of the work w is completed in this way, the cutting tool mounting bases 3a and 3b are moved so as to be separated from the work w, and subsequently moved in the rotation center line direction of the chuck 1 to return to the original position. Prepare for processing.

Air is ejected from the air ejection pipes 23 and 36, and this air scatters the chips away from the cutting tool, the support wheel, and the like.

In the above embodiment, a pair of support wheel pressing devices 4 and 4 are provided to stably support the work w, but one pressing device 4 may be used.

Although the support wheel 17 and the sliding contact member 33 are pressed against the peripheral surface of the work w by the elastic force of the springs 8 and 30, instead of this, they may be pressed by elastic force such as control air pressure. It doesn't matter.

The supporting wheels 17 in the above embodiment are ...
It is conceivable to mount a sliding contact body that functions in the same manner as the sliding contact member 33 instead of, but if this is done, the amount of heat generated by the friction between the peripheral surface of the work w and the sliding contact body becomes large. This causes excessive thermal strain and adversely affects the processing of the work w. This means that the supporting wheels 17 ... Contribute to preventing the adverse effects of frictional heat. is there.

[0043]

According to the present invention configured as described above, the chattering phenomenon of a work such as a gluing roll is mechanically and effectively suppressed, so that the work peripheral surface is processed accurately and with high quality. It can be done efficiently and safely.

[Brief description of the drawings]

FIG. 1 is a front view explanatory diagram showing how the present invention is carried out on an NC lathe.

FIG. 2 is a front view showing a device according to the present invention with a part in section.

FIG. 3 is a side sectional view showing an apparatus according to the present invention.

FIG. 4 is a perspective view showing a usage state of the support wheel pressing device according to the present invention.

FIG. 5 is a perspective view showing a sliding contact member pressing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chuck 2 Core pushing means 3a and 3b Saddle 6 Base member 7 Support guide member 11 Support plate 17 Support wheel 24 Cutting tool 28 Base member 29 Support guide member 32 Pressing body 32a Arc surface 33 Sliding contact material w Work

[Procedure amendment]

[Submission date] December 24, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction contents]

However, this gluing roll processes the peripheral surface of a cylindrically shaped product (workpiece) such as an aluminum material or a stainless steel material by a lathe. In this case, the work size is, for example, a total length of about 1076 mm and an outer diameter of about 88 mm. , And the inner diameter is about 80 mm.

Claims (4)

[Claims] 1. A pair of saddles, which are vertically opposed to each other with a chuck rotation center line sandwiched therebetween and are movable to arbitrary positions near the rotation center line, have a rubber material having an outer peripheral portion in one of them. At least one pair of support wheels, which are formed on the chuck and are rotatable along the surface of the chuck, are attached so that they can be pressed with appropriate elastic force to specific locations in the front and rear direction of the circumferential surface of the cylindrical work piece grasped by the chuck. On the other hand, a cutting tool for cutting the peripheral surface of the work is attached to the other one, and the sliding contact resistance to the work is relatively small in the vicinity of the cutting tool, and it has appropriate elasticity and flexibility. By a lathe, which is mounted such that a sliding contact material such as nylon woven fabric is pressed by a suitable elastic force to a specific portion of the peripheral surface of the work opposite to the specific portion of the supporting wheel that is pressed. Cylindrical A work method for suppressing chattering of workpieces. 2. When a cylindrical work whose one end is grasped by a chuck and the other end is supported by a core pushing means is specified, the work peripheral surface is located at about 2/5 to 1/3 of the work length from the chuck side. At the location, a supporting ring whose outer peripheral portion is formed of a rubber material is kept pressed by an appropriate pressing force through elastic supporting means, and on the other hand, it faces the workpiece peripheral surface specific location in the diameter direction of the workpiece. On a specific part of the work peripheral surface on the side, a sliding contact material such as a nylon woven cloth having a relatively small sliding contact resistance with respect to the work and having appropriate elasticity and flexibility is appropriately pressed through another elastic pressure supporting means. A method for suppressing chattering of a cylindrical work by a lathe, characterized in that the sliding contact material is pressed together with pressure and is fed and moved integrally with a cutting tool located in the vicinity thereof. 3. A lathe equipped with a pair of saddles, which are vertically opposed to each other with the center of rotation of the chuck interposed therebetween and are movable to arbitrary positions near the center of rotation, wherein the lower saddle is the saddle. A support guide member that is to be urged by an appropriate elastic force toward a specific location on the work peripheral surface is attached to a base member that is fixed to the same body, and a support plate is fixed to the tip end portion of this support guide member. Two support wheels, the outer periphery of which is formed of a rubber material, are positioned on the upper surface of the support plate so as to be arranged in the front-rear direction in the circumferential direction of the work, and both are in contact with the work circumferential surface at the same time in the work circumferential direction A support wheel pressing device used for the anti-rattle processing of a cylindrical work by a lathe, which is configured to be mounted so as to rotate. 4. The upper saddle has a base member fixed to the saddle and a support guide member that is urged by a proper elastic force toward a specific position on the work peripheral surface, and a tip of the support guide member. A nylon woven fabric having a pressing body having an arcuate surface that is in contact with the peripheral surface of the work is fixed to the portion, and the arcuate surface has relatively small sliding contact resistance to the work and has appropriate elasticity and flexibility. A sliding contact material pressing device used for chattering suppression processing of a cylindrical work by a lathe according to claim 3, wherein a sliding contact material such as the above is applied.