KR101534261B1 - Jaw device for lathe chuck - Google Patents

Jaw device for lathe chuck Download PDF

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Publication number
KR101534261B1
KR101534261B1 KR1020150048807A KR20150048807A KR101534261B1 KR 101534261 B1 KR101534261 B1 KR 101534261B1 KR 1020150048807 A KR1020150048807 A KR 1020150048807A KR 20150048807 A KR20150048807 A KR 20150048807A KR 101534261 B1 KR101534261 B1 KR 101534261B1
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KR
South Korea
Prior art keywords
jaw
soft
master
setting
horizontal position
Prior art date
Application number
KR1020150048807A
Other languages
Korean (ko)
Inventor
최연서
Original Assignee
주식회사 금창아트텍
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Filing date
Publication date
Application filed by 주식회사 금창아트텍 filed Critical 주식회사 금창아트텍
Priority to KR1020150048807A priority Critical patent/KR101534261B1/en
Application granted granted Critical
Publication of KR101534261B1 publication Critical patent/KR101534261B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/102—Jaws, accessories or adjustment means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16004—Jaws movement actuated by one or more spiral grooves
    • B23B31/16008—Details of the jaws

Abstract

The present invention relates to a jaw device for a lathe chuck, wherein a soft jaw adhering to the outer circumference of a workpiece and a master jaw installed in a chuck body are joined together by a jaw nut and a cap screw. A horizontal position setting unit for setting the horizontal position for joining the soft jaw to the master jaw is formed on the rear side of the soft jaw and on the front side of the master jaw, wherein the rear side of the soft jaw and the front side of the master jaw come in contact with each other. Therefore, the device for a lathe chuck sets the horizontal position of the soft jaw without errors to allow the soft jaw to be joined to the master jaw, thereby improving workability and the machinability of workpieces against the replacement of soft jaw.

Description

[0001] The present invention relates to a jaw device for lathe chuck,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a jaw device for a lathe, and more particularly, to a jaw device for a lathe that can always set the joining position in the horizontal direction at the time of coupling a master jaw and a soft jaw.

In general, a CNC (Computer Numerical Control) lathe is a machine tool that automatically processes a desired workpiece by numerical control of a computer. The configuration includes a controller, which is an electronic device capable of automatically operating the machine, Machine body.

In more detail, the controller comprises a CNC system program, a PLC program, and a servo motor that can operate the machine. The machine body includes a head stock, a chuck, a turret, Tail Stock, bed, conveying device, and hydraulic device.

The chuck of the machine body is a device for firmly fixing a workpiece that can not be supported by a center by using a jaw device. Such a conventional chuck for a lathe is disclosed in Japanese Patent Application No. 10-0385365 A soft jaw that is formed at one end with an arc portion that is in close contact with the outer circumferential surface of the workpiece to fix the workpiece, a jaw nut that is coupled to the rear surface of the soft jaw by a cap screw, And a master jaw into which the jaw nut is inserted and coupled to the chuck body.

In addition, a threaded portion is formed on the rear surface of the soft jaw that is in contact with each other and on the front surface of the master jaw, and through the engagement of the threaded portions, the vertical joining position of the sort proe (radial direction when viewed from the workpiece) is set .

In this configuration, three pairs of master jaws combined with soft jaws are coupled to the chuck body at intervals of 120 degrees, so that the arc of each of the three pairs of soft jaws closely contacts the outer periphery of the workpiece at intervals of 120 degrees at three points The center of the workpiece is firmly fixed and the soft jaw having a suitable arc portion is replaced with the master jaw according to the diameter of the workpiece to be fixed.

However, according to the above-described conventional jaw device, when the soft jaws are replaced with the master jaws according to the workpiece, it is possible to accurately set the vertical position of the sort pr oo through the threaded portions, It is very difficult to securely fix the center of the workpiece, and it is often difficult to fix the arc portion to the workpiece due to the error in the horizontal position, So that the workability is remarkably lowered.

In other words, since the jaw ornament that combines the master jaw with the soft jaw must be inserted into the master jaw and be vertically displaceable, a certain clearance must be given between the master jaw nut installation and the jaw nut, As a result, every time the soft jaws are combined, there is a slight error in the horizontal position of the soft jaw due to the clearance occurring in the gap.

As shown in Fig. 6A, the three pairs of soft jaws 1 must securely fix the workpiece with the respective arc portions accurately in close contact with the outer periphery of the workpiece with respect to the center of the workpiece P, if an error e occurs in the horizontal position of the soft jaw coupled to the master jaw as illustrated in FIG. 5B, the arc can not be accurately brought into close contact with the outer periphery of the workpiece, and the workpiece P can not be firmly fixed. It is necessary to separate the combined soft jaws (1) and fix them until the positions are corrected, or to fix the circular arc part itself closely to the outer periphery of the workpiece in a coupled state, It is.

Registration No. 10-0385365 (JOo fixing device for jaw processing of a lathe chuck) Public Utility Model No. 20-2012-0006866 (Joo of hydraulic chuck for lathe)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems of the prior art. It is an object of the present invention to provide a horizontal position setting unit on the contact surfaces of master jaws and soft jaws, So that it is possible to improve the workability and workability of the workpiece due to the exchange coupling of the saw teeth.

In order to achieve the above object, according to the present invention,

A jaw device for a chuck for a lathe, wherein the jaws are coupled to each other by a soft jaw that is closely attached to the outer periphery of the workpiece, and a master jaw jaw nut that is installed on the chuck body and a cap screw, A horizontal position setting means for setting horizontal joining positions between the sort projo and the master jaws is disclosed.

The horizontal position setting means includes a setting groove formed on one side of the rear surface of the soft jaw, a protrusion formed on one side of the front surface of the master jaw so as to be insertable into the setting groove, And a setting inclined surface inclined at a predetermined angle is formed on the setting projection portion, and a guiding inclined surface inclined at the same angle as the pressing inclined surface may be formed in the setting groove portion.

According to the jaw device for a lathe chuck according to the present invention,

Since the horizontal position setting part for easily setting the horizontal joining position of the soft jojo is formed on each contact surface of the master jojo and the soft jojo which are mutually coupled, the soft jojo can always be easily combined with the master jojo in the same horizontal position, It is possible to easily carry out the work according to the coupling and improve the workability and precision of the work.

It is to be noted that, in addition to the effect specifically described above, a specific effect that can be easily derived and expected from the characteristic configuration of the present invention can also be included in the effect of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating a jaw device of a lathe chuck according to the present invention,
2 is a view illustrating an exploded configuration of a jaw device of a lathe chuck according to the present invention,
FIGS. 3 to 5 are views illustrating an operation example in which the horizontal position is set by the horizontal position setting means, and the soft jaw and the master jaw are combined.
FIG. 6 is a conventional example illustrating a horizontal position error of a soft jaw in a conventional jaw.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a jaw assembly for a lathe according to the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention to those skilled in the art, It should be noted that the present invention can be reduced or exaggerated for the sake of simplicity.

It will also be understood that when an element is described as being "formed" or "coupled" to another element in the description of the embodiment, it may be directly formed or coupled to the other element, It should be understood that a component may be present

In addition, when describing the embodiments, in the case where it is judged that technical characteristics of the present invention may be unnecessarily blurred as a matter known to those skilled in the art, such as known functions and configurations well known in the art, Description thereof will be omitted.

1 to 5 illustrate a jaw device for a lathe chuck according to an embodiment of the present invention. Referring to the drawings, a jaw device of a lathe chuck according to an embodiment of the present invention (hereinafter referred to as a "jaw device" ) Has a horizontal position setting means 50 in the configuration of a conventional jaw device composed of a soft jaw 10, a master jaw 20, a jaw nut 30 and a cap screw 40 As shown in FIG.

First, a brief description will be given of the same constituent parts as those of a conventional JOo device.

The soft jaw 10 is a component for fixing a workpiece. The soft jaw 10 has a threaded portion 11 formed on a rear surface thereof along a vertical direction, and a nut, in which the end portion of the jaw nut 30 is inserted, An insertion groove 12 is formed.

A through hole 13 for fastening the cap screw 40 is formed in the nut insertion groove 12 and an arc portion 14 is formed at the lower end of the nut insertion groove 12 so as to be in close contact with the outer periphery of the work.

The master jaw 20 is connected to the soft jaw 10 and is installed on the chuck body. The master jaw 20 has a threaded portion 21 corresponding to the threaded portion 11 of the soft jaw 10, And a nut mounting portion 22 is formed at the center of the front surface to receive the head of the jaw nut 30. As shown in Fig.

The end of the jaw nut 30 is inserted into the nut insertion groove 12 of the shoof jaw 10 while the head is inserted into the nut mounting portion 22 of the master jaw 20, A fastening hole (31) is formed so that the screw (40) can be fastened.

The cap screw 40 is inserted into the fastening hole 31 of the jaw nut 30 through the through hole 13 of the master jaw 20.

With this configuration, the jaw nut 30 is installed in the master jaw 20, and in a state where the screw portions 11, 21 of the soft jaw 10 and the master jaw 20 are set in vertical positions to be engaged with each other, The soft jaws 10 can be firmly coupled to the master jaws 20 by fastening the cap screws 40 to the jaw nuts 30 through the jaws 10.

Next, the horizontal position setting means 50, which is a characteristic feature of the present invention, will be described.

The horizontal position setting means 50 is configured such that when the soft jaw 10 is coupled to the master jaw 20 by fastening the cap screw 40 to the jaw nut 30 as described above, And to set the horizontal joining position to be always in the same horizontal position with respect to the base 20.

The jaw nut 30 is fitted to the nut mounting portion 22 of the master jaw 20. Since the vertical position of the jaw nut 30 can be adjusted by the nut mounting portion 22, And the nut mounting portion 22 of the soft jaw 10. The clearance between the nut 20 and the nut mounting portion 22 is inevitably given a clearance, And the horizontal position setting means 50 performs a function of setting a horizontal direction coupling position to prevent an error in the horizontal direction coupling position due to the gap.

The horizontal position setting means 50 may include a setting groove portion 51 and a setting protrusion portion 52 formed on the contact surfaces of the soft jaws 10 and the master jaws 20, respectively.

The setting groove portion 51 is formed on one side of the rear surface of the soft jaw 10 and the setting jaw portion 52 is protruded on one side of the front surface of the master jaw 20 so as to be insertable into the setting groove portion 51 do.

The setting recess portion 52 is not formed at the same position as the setting groove portion 51 but is formed at a position eccentrically spaced from the setting groove portion 51 by a predetermined gap g. The setting portion 52 is formed at a position eccentrically outwardly spaced apart from the setting groove portion 51 by a predetermined distance g ) Eccentricity.)

The setting projection portion 52 is formed with a pressing slope 52a inclined at a predetermined angle and the setting slit portion 51 is formed with an inclined guiding surface 51a inclined at the same angle as the pressing slope 52a.

When the setting projecting portion 52 is inserted into the setting groove portion 51 by the engagement of the cap screw 40 by forming the pressure inclined surface 52a and the guiding inclined surface 51a while being formed in the mutually eccentric position, The guiding inclined surface 52a and the guiding inclined surface 51a come into contact with each other while being displaced first and then the guiding inclined surface 51a is pressed while being pressed by the pressing inclined surface 52a as the cap screw 40 is continuously engaged, When the cap screw 40 is finally tightened, the setting groove 51 is completely aligned with the setting protrusion 52 as illustrated in FIG. 5 As shown in FIG.

Since the setting groove 51 is guided in the outward direction and the horizontal position is adjusted so as to be closely attached to the setting protrusion 52, the soft jaw 10 coupled to the master jaw 20 is also related to the clearance of the jaw nut 30 So that it can always be combined with the master jaw 20 in the same horizontal position.

The setting groove portion 51 is formed in the soft jaw 10 and the setting jaw portion 52 is formed in the master jaw 20 in the configuration of the horizontal position setting means 50. However, It is of course possible to form the setting protrusion 51 in the master jaw 20 and the setting protrusion 52 in the soft jaw 10 so as to perform the same function.

The jaws of the present invention as described above can easily adjust the positions of the soft jaws 10 and the master jaws 20 in the vertical direction by adjusting the engagement positions of the threaded portions 11 and 21, When the soft jaws 10 and the master jaws 20 are coupled to each other by fastening the jaws 40 to the jaw nuts 30 so that the soft jaws 10 and the master jaws 20 are automatically coupled by the horizontal position setting means 50 formed on the contact surfaces, It can be seen that the coupling can be made at the same horizontal position all the time while the horizontal joining position of the master jaw 20 is set.

Accordingly, in machining various sizes of workpieces, it is very easy to replace the various soft jaws 10, and it is possible to replace the soft jaws 10 at the same position without any skilled skill. Therefore, it can be seen that the workability is greatly improved, the machining defect is not caused by the error of the jaw device, and the machining quality can be improved.

In addition, if the configuration of the conventional JOo device is largely changed, even if the technical purpose of easy setting of the horizontal position is attained, the overall efficiency of such technology development is inferior due to an excessive increase in manufacturing cost due to the structural change Since the present invention is based on a relatively simple structure improvement without changing other configurations, it is possible to achieve a technical effect of improving workability and to minimize the manufacturing cost increase of the JOo device due to the structure improvement, It can be seen that the efficiency of development is very high.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the technical scope of the invention is not limited to the disclosed exemplary embodiments and drawings, It will be understood that the modified equivalent structure is not limited to the scope of the present invention.

The main parts of the accompanying drawings are as follows.
10: Soft Joo 20: Master Joo
30: JO nut 40: Cap Screw
50: horizontal position setting means 51: setting groove
52: setting projection 51a: guide slope
52a: Pressurized inclined surface

Claims (2)

A jaw of a chuck for a lathe in which a soft jaw (10) closely attached to the outer periphery of a workpiece and a master jaw (20) installed in the chuck body are coupled to each other by a jaw nut (30) and a cap screw (40)
A horizontal position setting means 50 is provided on the rear surface of the soft jaw 10 and the front surface of the master jaw 20 to set the horizontal joining position between the sort pryoo 10 and the master jaw 20 Respectively,
The horizontal position setting means (50)
A setting groove 51 formed at one side of the rear surface of the soft jaw 10 and a setting groove 51 formed at one side of the front surface of the master jaw 20 so as to be insertable into the setting groove 51, And a setting protrusion 52 formed at an eccentric position with a predetermined gap g with respect to the setting protrusion 52. The setting protrusion 52 is formed with an inclined pressing surface 52a inclined at a predetermined angle, And a guiding inclined surface (51a) inclined at the same angle as the pressing inclined surface (52a) is formed. delete
KR1020150048807A 2015-04-07 2015-04-07 Jaw device for lathe chuck KR101534261B1 (en)

Priority Applications (1)

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KR1020150048807A KR101534261B1 (en) 2015-04-07 2015-04-07 Jaw device for lathe chuck

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Application Number Priority Date Filing Date Title
KR1020150048807A KR101534261B1 (en) 2015-04-07 2015-04-07 Jaw device for lathe chuck

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KR101534261B1 true KR101534261B1 (en) 2015-07-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113453830A (en) * 2019-03-06 2021-09-28 株式会社北川铁工所 Structure body
CN115415562A (en) * 2022-09-01 2022-12-02 安徽新诺精工股份有限公司 High-tightness lathe hydraulic hollow chuck convenient to assemble and disassemble

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101443145B1 (en) * 2014-01-03 2014-09-22 효은테크 주식회사 A Chuck for clamping machine work

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101443145B1 (en) * 2014-01-03 2014-09-22 효은테크 주식회사 A Chuck for clamping machine work

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113453830A (en) * 2019-03-06 2021-09-28 株式会社北川铁工所 Structure body
EP3936266A4 (en) * 2019-03-06 2022-04-27 Kitagawa Iron Works Co., Ltd. Structure
CN115415562A (en) * 2022-09-01 2022-12-02 安徽新诺精工股份有限公司 High-tightness lathe hydraulic hollow chuck convenient to assemble and disassemble

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