KR20170069565A

KR20170069565A - Chuck for fixing dies

Info

Publication number: KR20170069565A
Application number: KR1020150176931A
Authority: KR
Inventors: 김한응; 양종인; 김성호; 이병술
Original assignee: 김한응; 김성호; 양종인
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2017-06-21
Also published as: KR101868511B1

Abstract

The present invention relates to a die fixing chuck, and more particularly, to a die fixing chuck capable of processing a male screw by simply selecting a die that meets the specifications of the male screw to be machined and then fixing the die to the tailstock.
The present invention relates to a holder member having a groove in which a die for threading an object is fitted and fixed; A mounting member formed concentrically with the holder member, one side of which is detachably coupled to the holder member, and the other side of which is tapered so as to be mounted on the tailstock of the shelf; And a spring interposed between the holder member and the mounting member and providing an elastic force to the holder member when the screw is machined.

Description

{CHUCK FOR FIXING DIES}

The present invention relates to a die fixing chuck, and more particularly, to a die fixing chuck capable of processing a male screw by simply selecting a die that meets the specifications of a male screw to be machined and then fixing the die to a tailstock of a lathe.

Generally, a die is a tool used for cutting a male thread on a bolt or the like, and a cutting edge is attached to a protruding portion radially projecting on a circular inner surface. Such a die includes a die body and a die handle into which the die body is inserted. The dice body is generally formed into a ring shape. The die handle is provided with a handle formed to extend outwardly, and a die body is fitted in the die handle.

The dies according to the related art are assembled in such a manner that the dice body and the dice handle are fastened to the dice body with the dice body fitted in the dice handle, and the dice body is fixed to the dice handle. In order to process the object to be machined with the dies thus assembled, the object to be machined is placed on the inner circumferential surface of the dice body while the object is fixed to a fixing device such as a vice. Then, when the worker grasps the knob of the dice handle and rotates while pressing the object, a thread is formed on the object by the cutting edge of the thread-like shape formed on the dice body.

According to this prior art dice, the size of the die handle must be changed according to the outer diameter of the die body according to the screw size, and when the workpiece is fixed in a place where the work space is narrow or interference exists, There is a problem that the threading work can not be performed. In addition, since the prior art dies perform the threading operation depending on the force of the worker, when the workpiece having a large size is machined, the fatigue of the worker is increased and the working time is increased. .

In addition, since the prior art dies are manually threaded by holding the knobs of the die handles, the threads are not machined uniformly every time the work is performed, and the middle portion of the threads is crowded, There is a problem in that it is difficult to process.

KR 10-2010-0118025 A (2010.11.04.)

DISCLOSURE Technical Problem The present invention has been devised in order to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a dice fixing apparatus which can fix a die in accordance with the specification of a male screw to be machined, The purpose is to provide chuck.

Another object of the present invention is to provide a die fixing chuck which allows a thread to be machined uniformly every time a worker performs a screw machining operation.

It is still another object of the present invention to provide a dice fixing chuck which can easily be installed and screwed and can process screws of various sizes.

In order to achieve the above-mentioned objects, the present invention provides a holder comprising: a holder member having a groove formed therein for fixing a thread to an object; A mounting member formed concentrically with the holder member, one side of which is detachably coupled to the holder member, and the other side of which is tapered so as to be mounted on the tailstock of the shelf; And a spring interposed between the holder member and the mounting member and providing an elastic force to the holder member when the screw is machined.

Preferably, one side of the mounting member has a hollow cylindrical shape, the holder member is movably inserted, and the first through hole is formed long along the length direction.

The holder member may include a cylindrical large-diameter portion into which the dice are inserted and fixed, and a cylindrical small-diameter portion extending from the large-diameter portion and having a smaller diameter than the large- Wherein a plurality of first fastening holes are formed in the circumference of the large diameter portion in the radial direction, a second fastening hole is formed in the small diameter portion around the circumference in the radial direction at regular intervals along the length direction, And the fastening mechanism is fastened to the second fastening hole through the first through hole.

The small-diameter portion is divided into a first member and a second member along the longitudinal direction, and the first member and the second member are detachably coupled to each other. The second member has a constant It is preferable that a second fastening hole be formed at every interval.

Preferably, the holder member has an outer diameter corresponding to the groove inner diameter of the holder member, and an inner diameter of the holder member is fixed by fitting a ring-shaped auxiliary member corresponding to the outer diameter of the die, and the die is fitted and fixed to the auxiliary member, And a second through hole is formed in the circumferential direction.

In addition, it is preferable that one or more cut portions cut flatly are formed on the outer circumferential surface of the auxiliary member.

According to the means for solving the above-mentioned problems, the present invention has the following effects.

The present invention is configured to detachably connect a holder member to which a die is fixed by being attached to a mounting member mounted on a tailstock of a shelf so as to select a die that meets the specification of the male screw to be machined and fix it on the holder member, So that the male screw can be easily machined.

In addition, since the present invention is mounted on a tailstock of a lathe, the screw is machined only by rotation of the lathe chuck, so that the thread is machined uniformly every time the operator performs a screw machining operation. As a result, a screw of an accurate size can be machined.

Further, according to the present invention, since the holder member can be used by interposing an auxiliary member if necessary, it is possible to process screws of various sizes.

Further, the present invention has the effect of facilitating assembly and separation by minimizing the contact area between the inner surface of the holder member and the outer surface of the auxiliary member by forming one or more cutting portions on the outer peripheral surface of the auxiliary member.

In addition, according to the present invention, the small-diameter portion of the holder member is divided into the first member and the second member so as to be detachable from each other. As a result, the manufacturing cost can be reduced and the weight can be reduced.

In addition, the present invention has a simple structure and is easy to install even for a beginner and has an effect that a screw can be machined.

In addition, according to the present invention, the other side of the mounting member is provided with a morph tapered arbor, which has the effect of being mounted and fixed to the tailstock in a one-touch manner.

According to the present invention, a spring is provided between the holder member and the mounting member, a second fastening hole is formed in the small-diameter portion of the holder member along the longitudinal direction at regular intervals, and the first fastening hole is formed along the longitudinal direction of the fastening member There is an effect that the elastic force provided to the holder member at the time of threading can be controlled.

1 is a view showing a first embodiment of a die fixing chuck according to the present invention.
Fig. 2 is an exploded view of Fig. 1. Fig.
3 is a view showing a second embodiment of a die fixing chuck according to the present invention.
Fig. 4 is an exploded view of Fig. 3. Fig.
5 is a view showing a third embodiment of the die fixing chuck according to the present invention.
6 is a view showing another example of the auxiliary member in the third embodiment of the die fixing chuck according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a die fixing chuck according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and that the inventor should properly interpret the concepts of the terms to best describe their invention It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. In addition, since the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It is to be understood that equivalents and modifications are possible.

FIG. 1 is a view showing a first embodiment of a die fixing chuck according to the present invention, and FIG. 2 is an exploded view of FIG.

The die fixing chuck according to the first embodiment of the present invention comprises a holder member 10, a mounting member 30, and a spring 20.

The holder member 10 has a large diameter portion 12 and a small diameter portion 14 integrally formed by fixing a dice D for threading to an object.

The large diameter portion 12 has a cylindrical shape in which the dice D are fitted and fixed on a concentric axis, and a plurality of first fastening holes 12a are formed in the circumferential direction. At this time, a screw thread is formed on the inner circumferential surface of the first fastening hole 12a so as to be threadedly engaged with the bolt B fitted to the first fastening hole 12a, and is projected through the first fastening hole 12a The end of the bolt B presses the outer periphery of the die D fitted to the large diameter portion 12 so that the die D fitted to the large diameter portion 12 is firmly fixed.

The small diameter portion 14 is formed in a cylindrical shape having a diameter smaller than that of the large diameter portion 12 and extending in the longitudinal direction from the large diameter portion 12 so as to have a concentric axis with the large diameter portion 12, A plurality of second fastening holes 14a are formed at regular intervals. A thread is also formed on the inner circumferential surface of the second fastening hole 14a.

The mounting member 30 is concentric with the holder member 10. One side 32 is detachably coupled to the holder member 10 and the other side 34 is connected to a tapered rod . At this time, one side 32 of the mounting member 30 has a hollow cylindrical shape, and the holder member 10 is movably inserted, and the first through hole 32a is formed long along the longitudinal direction. The bolt B Passes through the first through hole 32a and is fastened to any one of the second fastening holes 14a formed in the small diameter portion 14. [

The holder D is detachably coupled to the mounting member 30 mounted on the tailstock of the shelf so that the die D conforming to the specification of the male thread to be machined is formed. The holder member 10 is fixed to the holder member 10 and then the holder member 10 is coupled to the mounting member 30 so that the male screw can be easily processed.

On the other hand, the other side 34 of the mounting member 30 is provided with a morse taper arbor, so that it can be mounted and fixed to the tail pad at one touch.

The spring 20 is interposed between the holder member 10 and the mounting member 30 in the form of a coil spring to provide an elastic force to the holder member 10 at the time of threading. That is, before the user performs threading, the spring 20 adjusts an appropriate elastic force to be applied to the holder member 10, and then the threaded portion 32a of the bolt B is screwed into the first through hole 32a formed in the mounting member 30. [ So that appropriate elastic force by the spring 20 can be constantly provided to the holder member 10 at the time of threading by fastening the fastener 20 to any one of the second fastening holes 14a formed in the small- .

In addition, since the threading is performed only by rotation of the lathe chuck in a state where it is mounted on the tailstock of the lathe, the thread can be machined uniformly every time the operator performs the threading work. As a result, a screw of an accurate size can be machined.

FIG. 3 is a view showing a second embodiment of a die fixing chuck according to the present invention, and FIG. 4 is an exploded view of FIG.

The die fixing chuck according to the second embodiment of the present invention comprises a holder member 10, a mounting member 30, and a spring 20.

The holder member 10 is made up of a large diameter portion 12 and a small diameter portion 14 in which a dice D for threading is fitted and fixed to an object.

The small diameter portion 14 is formed in a cylindrical shape extending in the longitudinal direction from the large diameter portion 12 so as to have a concentric axis with the large diameter portion 12 and having a smaller diameter than the large diameter portion 12. The small diameter portion 14 is divided into a first member 15 and a second member 16 along the longitudinal direction and the first member 15 and the second member 16 are detachably coupled. That is, a thread is formed on the inner surface of the first member 15, and a rib having a diameter smaller than that of the second member 16 is protrudingly formed on the end of the second member 16 coupled with the first member 15, So that the first member 15 and the second member 16 are screwed together. As described above, the small-diameter portion 14 of the holder member 10 is divided into the first member 15 and the second member 16 so as to be detachable from each other. As a result, the manufacturing cost can be reduced and the weight can be reduced. On the other hand, a plurality of second fastening holes 16a are formed around the second member 16 at regular intervals along the length direction in the radial direction. A thread is also formed on the inner circumferential surface of the second fastening hole 16a.

The mounting member 30 is concentric with the holder member 10. One side 32 is detachably coupled to the holder member 10 and the other side 34 is connected to a tapered rod . At this time, one side 32 of the mounting member 30 has a hollow cylindrical shape and is movably inserted into the holder member. The first through hole 32a is formed long along the longitudinal direction, Passes through the first through hole 32a and is fastened to any one second fastening hole 16a formed in the second member 16 of the small diameter portion 14. [

The spring 20 is interposed between the holder member 10 and the mounting member 30 in the form of a coil spring to provide an elastic force to the holder member 10 at the time of threading. That is, before the user performs threading, the spring 20 adjusts an appropriate elastic force to be applied to the holder member 10, and then the threaded portion 32a of the bolt B is screwed into the first through hole 32a formed in the mounting member 30. [ So that an appropriate elastic force by the spring 20 is applied to the holder member 10 at the time of threading by fastening it to any one of the second fastening holes 16a formed in the second member 16 of the small- It can be provided constantly.

5 is a view showing a third embodiment of the die fixing chuck according to the present invention.

The die fixing chuck according to the third embodiment of the present invention comprises a holder member 10, an auxiliary member 18, a mounting member 30, and a spring 20.

The holder member 10, the mounting member 30, and the spring 20 are the same as those in the second embodiment described above, and therefore, a description thereof will be omitted here.

The auxiliary member 18 has a ring shape and is fitted and fixed to the holder member 10 and has an inner diameter corresponding to the outer diameter of the dice D. [ The auxiliary member 18 is fixed to the dies D on a concentric axis, and a second through hole 18b is formed around the auxiliary member 18 in the radial direction. The threaded portion of the bolt B which has passed through the first fastening hole 12a formed in the large diameter portion 12 of the holder member 10 passes through the second through hole 18b of the assistant member 18, The auxiliary member 18 and the large-diameter portion 12 of the holder member 10 are firmly engaged by pressing the outer periphery of the holder D with respect to the outer periphery of the holder D.

As described above, the holder member 10 is constructed so as to be able to use the auxiliary member 18 when necessary, so that it is possible to process screws of various sizes. That is, when the die D having a small diameter is used for machining a screw having a very small diameter, only the auxiliary member 18 having an inner diameter corresponding to the outer diameter of the die D is replaced with the holder member 10, The cost can be reduced.

6 is a view showing another example of the auxiliary member in the third embodiment of the die fixing chuck according to the present invention.

5, the auxiliary member 18 may be formed in a circular shape as shown in FIG. 6. However, the auxiliary member 18 may be manufactured such that one or more cut portions 18a, which are cut flat on the outer peripheral surface of the auxiliary member 18, It is possible. This minimizes the contact area between the inner surface of the holder member 10 and the outer surface of the auxiliary member 18, thereby facilitating assembly and separation.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Will be apparent to those of ordinary skill in the art.

D: Dice 10: Holder member
12: Large neck part 14: Small neck part
18: auxiliary member 18a:
20: spring 30: mounting member

Claims

A holder member in which a groove for fixing a thread is formed in an object to be threaded;
A mounting member formed concentrically with the holder member, one side of which is detachably coupled to the holder member, and the other side of which is tapered so as to be mounted on the tailstock of the shelf; And
And a spring interposed between the holder member and the mounting member and providing an elastic force to the holder member at the time of threading.

The method according to claim 1,
Wherein one side of the mounting member has a hollow cylindrical shape, the holder member is movably inserted, and the first through-hole is formed long along the longitudinal direction.

The method of claim 2,
The holder member includes a cylindrical large-diameter portion into which a dice is fitted and fixed, and a cylindrical small-diameter portion extending from the large-diameter portion and having a diameter smaller than that of the large- Diameter portion)
Wherein a plurality of first fastening holes are formed in a circumferential direction in the large diameter portion,
A second fastening hole is formed in the small diameter portion at a predetermined interval in the circumferential direction along the length direction,
And the fastening mechanism is fastened to the second fastening hole through the first through hole.

The method of claim 3,
The small diameter portion is divided into a first member and a second member along the longitudinal direction, the first member and the second member are detachably coupled,
And a second fastening hole is formed in the second member in the circumferential direction at regular intervals along the length direction in the radial direction.

The method according to any one of claims 1 to 4,
Wherein the holder member has an outer diameter corresponding to a groove inner diameter of the holder member and an inner diameter of which is fixed by fitting a ring-shaped auxiliary member corresponding to the outer diameter of the die, a die is fitted and fixed to the auxiliary member, And a second through-hole is formed in a direction perpendicular to the first direction.

The method of claim 5,
Wherein at least one flat cut portion is formed on an outer circumferential surface of the auxiliary member.