KR20170047115A

KR20170047115A - Open chuck for CNC lathes

Info

Publication number: KR20170047115A
Application number: KR1020150147585A
Authority: KR
Inventors: 지 성 황
Original assignee: 주식회사 프라즈마태우
Priority date: 2015-10-22
Filing date: 2015-10-22
Publication date: 2017-05-04
Also published as: KR101852124B1

Abstract

The present invention relates to an open chuck for a CNC lathe, formed by collecting an open jaw, a jaw driving unit, and a jaw setting unit in a tubular body having a head jaw to be engaged to a jaw of a CNC lathe to transmit spindle driving force to a workpiece. The open chuck has the open jaw, the jaw driving unit, and the jaw setting unit collected on the tubular body, and obtains a workpiece processing power by being engaged to a hydraulic chuck of the CNC lathe. An inner surface of a hollow portion of a workpiece is engaged to the jaw of a CNC lathe by the open tool of the present invention to allow an outer surface of the workpiece to be easily processed. A power of the jaw driven by CNC lathe hydraulic control reaches the open jaw to strongly hold the inner surface of the hollow portion. Accordingly, the open chuck for a CNC lathe is capable of easily and precisely processing a workpiece without separation of the same during processing.

Description

Open chuck for CNC lathes

This invention relates to an open chuck for a CNC lathe. The CNC lathe is used for the open chuck of a CNC lathe which is used by jaws of a CNC lathe. The CNC lathe can hold the inner surface of a small diameter workpiece by the hydraulic control of the CNC lathe with a spreading jig and can easily cut off all the outer surface of the workpiece. . That is, the vertical force of the CNC lathe hydraulic jaws is applied to the horizontal direction of the tool control shaft, thereby spreading the open jaw which contacts the inner surface of the workpiece.

Numerical control The jaw mounted on the spindle of the CNC lathe drives the jaw as the internal hydraulic control and grasps the outer surface of the workpiece or the inner surface of the hollow part of the workpiece.

So, if you can catch the outer or inner surface of the workpiece with a hydraulic chuck, there is almost no problem in machining.

However, when the inner surface of the hollow part of the workpiece is caught by the outer surface jig of the CNC lathe, there is no problem if the diameter of the hollow part of the workpiece is larger than 40 mm. However, if the diameter is smaller than 30 mm to 35 mm, I can not catch it because of the joke of a lot of difficulties. That is, when the jig jig is machined in accordance with the small inner diameter of the hollow portion of the workpiece, the thickness of the jig is reduced. If the jig is too thin, vibration of the workpiece occurs at the time of machining, and furthermore, the gripping force of the workpiece is so weak that machining of the workpiece can not be performed in depth.

Therefore, in the case of small diameter workpieces based on the inner diameter, the workpiece has been machined by using an open jaw chuck (inner diameter chuck) of a benchless chore, but the stroke of the benchless three axes X, Y and Z is limited, The quality is also reduced.

The open-jaw chuck of the Dali benchless crawler is attached to the modified CNC lathes, but the machine control terminal of the CNC lathes that controls the modified open jaw chuck is located farther than 1000 mm, The workpiece can not be machined deep because the force is not strong.

The present invention is to provide a small-diameter open-jaw tool capable of easily grasping the inner surface of a small-diameter workpiece by borrowing the power of a CNC hydraulic jaw and easily processing the outer surface of the workpiece without modification of the CNC machine at the CNC lathe.

Particularly, when the inner surface of the hollow part of the forged workpiece is caught and processed, the shape of the hollow part may not be circular, but a diffusing jig of the open jaw chuck may be processed into an inner surface shape of a forged workpiece, .

The present invention is to provide a hydraulic chuck of a CNC lathe that can bite the inner surface of a workpiece by boring the hydraulic pressure of the CNC lathe and can easily process the outer surface of the workpiece.

The present invention is to provide an open chuck for a CNC lathe in which an open jaw, a jaw drive, and a jaw setting part are assembled in a joint of a tubular body that transmits a workpiece machining power to a CNC lathe.

The present invention aims to provide an open chuck for a CNC lathe, in which an open-jaw diffusion jig driven by a CNC lathe hydraulic control captures the inner surface of a workpiece.

The present invention relates to a method of manufacturing a CNC lathe by assembling an open jaw having a one-to-one correspondence with a workpiece having a hollow part to an open chuck for a CNC lathe, and attaching an open chuck for a CNC lathe assembled with an open jaw to the jaw of the CNC lathe, And to provide an open chuck for a CNC lathe which is chucked and machined.

An open chuck (sometimes referred to as an inner chuck) for a CNC lathe transfers the driving force of a CNC lathe spindle chuck to the workpiece by engaging a tubular body with a head jaw on the CNC lathe hydraulic chuck. In this state, the head jaw is handed over to the CNC lathe.

At the same time, the tubular body is provided with an open loop for holding the inner surface of the workpiece in the tubular body having a workpiece so that the hydraulic jaw of the CNC lathe drives the open chuck, a jaw driving part driven by the hydraulic jaw force and a jaw setting part Respectively.

The open jaw with the diffusion type fixture is assembled to the tubular body and is a workpiece full speed component which uses the diffusion type fixture part to shape and size of the inner surface of the hollow part of the workpiece.

The open jaw is formed such that the outer peripheral screw of the diffusion jig is fastened to the inner surface thread of the tubular body cavity and the outer peripheral surface of the tubular body is tightly attached to the inner inclined inner wall surface so that the rotation center axes of the two parts coincide, When the workpiece is machined by screwing the outer periphery screw of the root portion, the assembling between the two parts is not released, and a clearance space is provided at the end of the root screw to ensure faithful close contact between the outer periphery and the inner periphery.

The open jaw has a four-way diffusion jig extending from the root and a control shaft embedded in the inner cavity.

Open-ZO is a dedicated part corresponding to the workpiece one-to-one. The open jaw diffuser jig is machined by CNC lathe and other machine tools with diameter d corresponding to the inner diameter of the hollow part of the workpiece. To accomplish this, the open jaw is separated from the tubular body, and an open jaw having a plurality of diffusing jig diameters d is prepared, and the open jaw's diffusion jig is machined to match the shape of the hollow portion and the inner diameter of the workpiece . A diffusion type fixture divided into four parts from the spreading origin was constructed. The diffusion size of the diffusion jig is within 800 ㎛ in diameter. The inside of the diffusion type jig of JOO is an arc-shaped jig slope, and the end of the drive shaft is a circle-shaped control slope that contacts the jig slope to diffuse the diffusion jig.

The control shaft is pulled in the axial direction at the jogging drive portion so that the control inclined surface enlarges the outer diameter of the diffusion jig at the jig slope and brings the four-way diffusion jig into close contact with the inner surface of the hollow portion of the work M. In addition, when the pulling force of the control shaft disappears, the return force of the return spring and the diffusion jig pushes the jaw control shaft and the outer diameter of the enlarged diffusion jig contracts to the initial state.

A needle bearing is incorporated in the open-jaw cavity to stably support the control shaft in an operating state.

The jogging drive unit is configured to correspond to the three-directional jogging of the CNC lathe hydraulic chuck. The centrifugal cam having a cam hole corresponding to the triangular jaw formed in the tubular body in a radial direction and provided with a drive cam having a sliding cam inclined surface to pull the control shaft in the cam hole and guided to the body cylinder, The return spring is mounted on the control shaft in conjunction with the cam slope. When the jaw of the CNC lathe hydraulic chuck is moved in the center direction in three directions, the drive cam moves the end cam in the control axis direction to the protruding size of the tubular body, and the end cam pulls the control shaft. When the tubular body is detached from the CNC lathe spindle jaw, the return cam of the compressed spring and the return force of the diffusion jig move in the pulling operation to the initial position. The stopper of the drive cam determines the initial position of the drive cam.

The jog-setting section has the longitudinal cam inserted into the control shaft. A control nut is inserted to push the end cam on the control shaft notched face screw. The set bolt is inserted into the rear screw hole of the adjustment nut. A return spring is installed between the adjusting nut and the screw cover of the tubular body. Six to ten engagement holes are provided along the rear edge of the adjustment nut, and a latching pin inserted into the engagement hole along the guide hole of the cover is fitted in the engagement hole.

In setting the jaw drive amount, first, the fixing pin of the bolt is inserted into the fitting hole to fix the adjusting nut position. The fixing pin can change the fixing position of the adjusting nut by changing the position of the fitting hole. In the second step, the driver 35 is fitted into the driver's arbor groove 34 of the control shaft, and the control shaft is turned and fastened to the adjusting nut to determine the effective moving distance of the control shaft, which is diffused by the slope of the jig of the diffusion jig touching the control slope of the control shaft. . In the third step, insert the L-shaped wrench into the wrench groove of the set bolt inserted in the screw hole of the adjusting nut, and tightly press the rear end of the control shaft in the same screw hole to fix the control shaft and adjustment nut together. In the fourth step, the L-shaped wrench and the fixing pin are separated and stored, the hollow part of the workpiece is inserted into the diffusion jig, and the CNC lathe open chuck is machined on the CNC lathe. At this time, the diffusion size of the diffusion jig can be measured by subtracting the workpiece and putting the open chuck on a CNC lathe hydraulic jaw.

As described above, the present invention provides an open chuck of a CNC lathe obtained by obtaining a workpiece machining power from a CNC lathe and joining an open jaw, a jaw drive, and a jaw setting part to a hollow of a tubular body, The inner surface of the hollow part of the workpiece is chucked by the diffusion jig, thereby making it possible to easily process the outer surface of the workpiece. In addition, the outer surface of the workpiece can be easily processed, and the open chuck The present invention provides an open chuck for a lathe CNC lathe capable of determining and setting an effective moving distance for operating a diffuser jig.

1 is an external perspective view of an open chuck for a CNC lathe.
Fig. 2 shows a state in which an open chuck for a CNC lathe is bite into a CNC lathe spindle jaw
3 is a front view of an open chuck for a CNC lathe.
4 is a cross-sectional view of an open chuck for a CNC lathe
Fig. 5 is a graph showing the degree of spraying of an open chuck for a CNC lathe
6 is a 3D graphic exploded view of an open chuck for a CNC lathe.

The present invention will be described in detail with reference to the accompanying drawings.

The open chuck for a CNC lathe is chucked by a hydraulic driving force of a jaw J and is machined by the rotational force of the spindle S by being passed through a spindle S of a CNC lathe hydraulic chuck J, An open jaw portion 1 for holding an inner surface of the hollow portion of the work M in the cavity 12, a jaw driving portion 2 driven by receiving the hydraulic pressure of the CNC lathe, and a jaw setting portion 3. [

The open jaw is formed in such a manner that the outer threaded screw 21 having the tool engagement portion 27 is fastened to the inner threaded screw 15 of the body cavity and the sheave outer peripheral surface 22 is in close contact with the hollowed inclined inner wall surface 16 The rotation center axes of the two parts are aligned and the direction of the screws 21 and 15 is set so that the rotation direction of the CNC lathe spindles tightens the two screws 21 and 15 and the two screws 21 and 15, The clearance space 29 is formed between the outer circumferential surface 22 and the inner wall surface 16 so that the oblique outer circumferential surface 22 and the inner wall surface 16 are firmly adhered to each other and the two components are prevented from being separated during workpiece machining .

The open jaw extends outwardly from the root and has a control shaft 30 incorporated therein.

The open jaw diffuser jig 25 is machined into a diameter d and a shape corresponding to the inner diameter and shape of the hollow portion of the work M. A plurality of open jaws can be prepared and used in one tubular body 10. The open jaw was provided with a spreading jig 25 divided into four parts from the spreading point 23. The diffusion size of the diffusion jig 25 is within 800 占 퐉 in diameter. The inner side of the diffusion jig 15 is an arc-shaped slippery slope 26 and the end of the drive shaft 30 is a circularly sloping slope 31 that makes contact with the slider surface 26 to diffuse the fixture.

The control shaft 30 is pulled in the axial direction at the jogging drive portion when the drive cam 40 is pressed by the CNC lathe hydraulic pressure jaw so that the control inclined surface 31 expands the outer diameter of the diffusion jig 25 from the jig slope 26 And is brought into close contact with the inner surface of the hollow portion of the workpiece M. When the pressing force of the driving cam 40 is extinguished, the return spring 52 pushes the jaw control shaft 30 and the diffusive jig 35 returns to the initial position by the elasticity of the magnetic force, ) The outer diameter contracts.

A needle bearing (28) is built in the open jaw cavity (24) to stably support the control shaft (30) in an operating state.

The jogging drive unit is configured to correspond to the three-directional jaw (J) of the CNC lathe spindle (S). A cam hole 17 for radially assembling the drive cam 40 corresponding to the three spindle jaws J is radially provided in the tubular body 10. [ So as to pull the control shaft 30 to the cam hole 17

The drive cam 40 having the sliding cam slope 41 is provided so as to slide toward the center of the tubular body 10 from the cam hole 17. [ The annular abutment cam 50 and the adjustment nut 40 and the return spring 52 which are guided in the body cylinder 13 are embedded in the tubular body 10 and the aft lid 14 is screwed to the tubular body . .

The control shaft 30 penetrating the sex cam 50 is fitted in the diffusion jig 25 of the open jaw 20 so that the outer screw 33 of the control shaft 30 is engaged with the adjustment nut 60. The fixing pin 64 of the bolt 63 is fitted into the guide hole 18 of the adjusting screw 60 through the guide hole 18 of the cover 14 to fix the adjusting screw 60 temporarily.

The driver 35 is inserted into the driver groove 34 at the front end of the control shaft 30 and the control shaft 30 is rotated to move the control shaft 30 in the axial direction. When the control sloping surface 31 of the control shaft 30 touches the jig inclined surface 26 of the diffusion jig 25, the L-wrench 68 is inserted into the screw hole of the tunnel nut 60 through the guide hole 18 The set bolt 66 is moved so that the control shaft 30 in the same screw hole is tightly adhered to the end so as to fix the control shaft 30 to the adjustment nut 60 The driver 35, the latch 63 and the L wrench are separated and stored, and an open chuck is used.

The control slope 31 is spaced apart from the jig slope 26 at a predetermined interval in the course of fixing the control shaft 30 and the adjustment nut 60 so that the movement distance of the control shaft 30 and the adjustment nut 60 The operating range of the mold jig 25 and the effective moving distance of the control shaft can be selected. At this time, the diffusion size can be measured by removing the workpiece and tapping the open chuck on the CNC lathe hydraulic jaw.

When the open jaw 50 is assembled to the tubular body 10 and the tubular body 10 of the open chuck is mounted on the hydraulic chuck of the CNVC lathe, the hydraulic jaw J of the CNC lathe drives the drive cam 40, The jig 25 is brought into close contact with the inner surface of the hollow portion of the workpiece M and the workpiece M is operated by the rotational force of the spindle S of the CNC lathe.

When the hydraulic jaw J of the CNC lathe is released after the machining is finished, the return spring 52 pushes the adjusting nut 60 and pushes the sex cam 50 so that the driving cam 40 returns to the first position, The jig 25 is also separated from the jig slope 26 by the control inclined surface 31 and returns to the initial position.

3 is a jaw setting part; 10 is a tubular body; 11 is a head jaw; 12 is a cavity; 13 is a body cylinder; 14 is a cover body; 15 is an inner screw, 16 is an inner wall surface, 17 is a cam hole, 18 is a guide hole,
20 is an open joint, 21 is an external thread, 22 is an outer peripheral surface, 23 is a base point of spread origin, 24 is a joint, 25 is a diffusion type fixture, 26 is a jig slope, 27 is a tool engagement portion, 28 is a needle bearing, Space portion,
30 is a control shaft, 31 is a control slope, 33 is a top screw, 34 is a driver groove, 35 is a driver,
40 a driving cam, 41 a cam slope, 42 a cam stopper,
Reference numeral 50 denotes a circular abstract mode cam, reference numeral 51 denotes an inclined surface, reference numeral 52 denotes a return spring, reference numeral 59 denotes a nut guide hole,
Reference numeral 60 denotes an adjustment nut. Reference numeral 61 denotes a setting hole. Reference numeral 63 denotes a bolt. Reference numeral 64 denotes a fixing pin. Reference numeral 65 denotes a bolt guide hole. Reference numeral 66 denotes a set bolt. Reference numeral 67 denotes a wrench groove.
M is the workpiece, S is the spindle of the CNC lathe, J is the spindle of the CNC lathe

Claims

CNC Lathes Spindle Jaws hold the inner surface of the hollow part of the workpiece in a tubular body with a head jaw for transferring the rotational driving force of the CNC lathe to the workpiece by engaging a tubular body having a head jaw and driving the open jaw by the hydraulic pressure of the CNC lathe. Open chuck for CNC lathe, which is characterized by the open jaw part, the jaw drive part driven by hydraulic pressure of the CNC lathe, and the jaw setting part.

The open jaw of claim 1,
The outer peripheral screw of the root portion is fastened to the inner thread screw of the body cavity and the outer peripheral surface of the root portion is brought into close contact with the inner wall surface of the cavity,
The open jaw extends outwardly from the root and has a control shaft built into the inner cavity,
The open jaw is equipped with a four-pronged diffusion jig at the spreading point,
The inside of the diffusion type jig of JOO is a jig slope, and the end of the drive shaft is a control slope contacting the jig slope,
The control shaft is pulled in the axial direction in the jogging drive section to enlarge the outer diameter of the diffusion jig on the inclined plane of the control slope,
And the return spring pushes the jaw control shaft to separate the control sloping surface (31) from the jig slope surface.

The jogging drive unit according to claim 1,
CNC Lathes Spindle Three cam holes are radially provided on the tubular body in correspondence with the three-way jaw,
A drive cam having a cam slope is provided so as to pull the control shaft in the cam hole,
A circular abstraction cam guided in the tubular body cylinder is interlocked with the drive cam,
The outer end of the return spring behind the adjustment nut is supported by the lid,
The control shaft is operated according to the presence or absence of the force acting on the three-way driving cam, and the driving cam is returned by the return spring, and the open jaw that has been diffused is also returned to its original position by self- Open chuck for CNC lathe.

The jaw setting unit of claim 1,
An adjusting nut, which is engaged with the control shaft notched screw, is provided between the sex cam and the return spring,
A set bolt for fixing the control shaft to the adjusting nut is provided in the screw hole of the adjusting nut,
A guide hole is provided for temporarily adjusting the adjusting nut in the process of fixing the control shaft and the adjusting nut to the adjusting nut,
Characterized in that the fixing pin of the bolt is provided on the outside of the cover with a fixing pin for fixing the adjusting nut by inserting it into the guide hole of the adjusting nut.

3. The method according to claim 2,
A tool-
Characterized by having a diffusion jig that is machined to the inside diameter of the hollow part of the workpiece.