JPH0691404A - Double-side lathe turning processing for flat work - Google Patents

Abstract

PURPOSE:To continue lathe turning processing of a work all the time without stopping even during reverse operation by providing a hand member for holding the work as its longitudinal both ends, reversing the work which is held at one end of the hand member, in its standby state, while the other work mounted on the lathe main spindle from the other end of the hand member is under its lathe turning process. CONSTITUTION:While a one-side lathe turning completion work is separated from the main spindle 1, a next work which has been fed to the other end of a hand member 2 beforehand is transferred to the main spindle side 1. The next work is mounted on the main spindle 1 so as to execute one-side lathe turning of the work and at the same time the one-side lathe turning completion work held at the one end of the hand member 2 is made to reverse by the completion of this lathe turning. And the next work whose one-side lathe turning has been completed is transferred to the other end of the hand member 2 and then the hand member 2 is made to move rotationally again so that the reversed work is remounted on the main spindle 1 to have its other side subjected to lathe turning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided turning method for a plate-like work such as an aluminum (including its alloy) magnetic disk substrate.

[0002]

2. Description of the Related Art For example, turning of a work such as an aluminum magnetic disk substrate as described above is generally carried out by using a front lathe with the work mounted on a rotary spindle of the lathe. Thus, in such a lathe, it is not possible to simultaneously turn both sides of the work with a cutting tool, so a work reversal process is always required after one-side turning.

Conventionally, such double-sided grinding of a work is carried out by removing the work from the spindle after turning the work on one side and reversing it, and then remounting the reversed work on the spindle and turning the other surface of the work. Was there. In some cases, only a single-sided turning of a plurality of workpieces is first carried out and then the workpieces are housed in a cassette, and when the cassette is fully distributed, the other surfaces of the workpieces are continuously turned next time.

[0004]

However, in such a method for double-sided turning of a workpiece, the waiting time at the time of reversal is long, or the one-sided turned workpiece must be taken out of the cassette again and mounted on the spindle. However, it has a drawback that the number of workpieces that can be double-sided turned per unit time is small and the production efficiency is not good.

The present invention has been made in order to solve such a drawback, and an object of the present invention is to provide a double-sided turning method capable of shortening the time required for double-sided turning of a workpiece and improving the production efficiency. To do.

[0006]

In order to achieve the above-mentioned object, the present invention shows, with reference to the reference numerals of the drawings, a work holding part for a single-sided turned work (A) from a lathe spindle (1) at both ends. (22) A step of transferring to one end of a hand member (2) having (23), and rotating the hand member (2) in a plane orthogonal to the axial direction of the spindle (1), whereby the one-sided turning is performed. A step of moving the finished work (A) from the spindle while moving the next work (A ′) previously supplied to the other end of the hand member (2) to the spindle side, and the next work (A ′) ) Is attached to the spindle (1) to perform one-sided turning of the work, and by the end of this turning, the one-sided turned work (A) held at one end of the hand member (2) is reversed. The above-mentioned workpiece (A
′) Is transferred to the other end of the hand member (2), and then the hand member (2) is rotated again in a plane orthogonal to the axial direction of the main shaft (1), whereby the next work (A ′).
Moving the inverted work (A) to the main spindle side while separating the work (A) from the main spindle (1), and mounting the inverted work (A) on the main spindle (1) again, A double-sided turning method for a plate-shaped workpiece is characterized in that the step of turning the other surface is carried out.

[0007]

A hand member (2) for holding a work is provided at both ends, and the work (A) held at one end of the hand member (2) is attached to the lathe spindle (1) from the other end of the hand member (2). Since the other workpiece (A ′) that has been cut is turned over and made to stand by, the turning of the workpiece is not stopped even during the turning operation, and the workpiece is continuously turned.

[0008]

EXAMPLES Next, an example will be described in which a donut-shaped aluminum magnetic disk substrate is used as a work according to the present invention and both sides of this work are ground.

1 and 2 show a schematic structure of a front lathe used for implementing the present invention.

In these drawings, (1) is a lathe spindle that rotates by mounting and holding a work (A) by a vacuum chuck system, and a hand member (2) that is long in the vertical direction is provided in front of the spindle. Has been done. This hand member (2)
Is a work chuck cylinder (2
It is configured to have bifurcated work holding claw pieces (22), (22), (23) and (23) which can be moved toward and away from each other by means of 1). Then, by moving each of the work holding claw pieces (22), (22), (23) and (23) in the approaching direction, the work (A) is chucked with its outer periphery sandwiched, while the work holding claw pieces ( 22) (22) (2
3) The chuck of the work (A) can be released by moving (23) in the separating direction. Further, the hand member (2) is movable by the front-rear cylinder (3) in the front-rear direction, that is, the axial direction of the main shaft (1), and is vertically movable by the up-down cylinder (4). A rotary actuator (5) composed of an air type rotary cylinder is rotatable in a plane orthogonal to the axial direction of the main shaft (1).

Incidentally, (6) shown in FIG. 2 is a suction pad (6
A work supply device that supplies the unprocessed work chucked by 1) to the hand member (2), and (7) is a one-side polished work that is chucked by the work holding claw pieces (22) (23) of the hand member (2). Is a reversing device for reversing the work. The reversing device sucks the work by the suction pad (71), temporarily removes the work from the hand member (2), and rotates the work 180 degrees in the left-right direction by the rotary actuator (72). After being reversed, the workpiece holding claw pieces (22) and (23) of the hand member (2) are chucked again. Further, (8) is a work receiving device that chucks the double-sided turned work chucked by the hand member (2) by the suction pad (81) and conveys it to the next process.
The work supply device (6), the reversing device (7), and the work receiving device (8) are attached to the same movable table (not shown), and in accordance with the movement of the movable table, the horizontal direction, that is, the main shaft (1). It is supposed to move synchronously in a direction orthogonal to the axial direction.

Next, a description will be given of a double-sided lathe turning method for a work using the apparatus shown in FIGS. 1 and 2. First, the hand member (2) is moved to the front upper side of the spindle (1) as shown in FIG. In this state, the unworked work (A) is supplied to the work holding claw piece (22) on the upper side of the hand member (2) through the work supply device (6).

Next, the hand member (2) is rotated vertically by 180 degrees to move the work to the lower end of the hand member (2), and then the hand member (2) is lowered and the spindle (1) is moved. ) And attach the work (A) to the spindle (1). Then, one side of the work (A) and the inner and outer chamfered parts are turned by a tool (not shown).

On the other hand, after the work is mounted on the spindle (1), the hand member (2) retracts and raises it in the spindle separating direction, and then the hand holding claw piece (23) on the upper side is next The unprocessed work (A ′) is supplied and kept in this state.

After the one-sided turning of the work (A), the hand member (2) is again lowered and advanced toward the main spindle (1) to move the one-sided turned work (A) of the main spindle (1) under the hand member (2). It is transferred to the workpiece holding claw piece (22).

Next, the hand member (2) is separated from the main shaft (1) and rotated by 180 degrees, and the next unworked work (A
′) Is moved to the lower side and the single-sided turned work (A) is moved to the upper side, and then the lower unprocessed work (A ′) is mounted on the spindle (1). Then, one side of the work (A ′) is turned.
By the time the turning of the work (A ') is completed, the hand member (2) is raised and the one-side turned work (A) is reversed as follows. That is, after the one-sided turned work (A) is adsorbed by the adsorption pad (71) of the reversing device (7) and once removed from the work holding claw piece (22), the reversing device (7) is rotated 180 degrees in the front-rear direction. Work piece that has been turned and turned on one side (A)
Invert. Then, in the inverted state, the work is reattached to the work holding claw piece (22) and made to stand by.

When the one-side turning of the next work (A ') is completed, the hand member (2) descends and advances again, and the work (A')
′) Is a workpiece holding claw (2) below the hand member (2).
3) is chucked. Subsequently, the hand member (2) is again rotated up and down to move the original work (A) downward and the next work (A ′) upward, and then the original work (A) is moved to the spindle. Reattach to (1). Then, the other surface of the work is turned.

On the other hand, the next work (A ') that has moved upward during this time is reversed by the reversing device (7) in the same manner as above until the other surface turning of the work (A) is completed, and is used for holding the work. It is chucked by the claw piece (23) and stands by.

After the double-sided turning of the work (A) is completed in this manner, the work (A) is chucked to the work-holding claw piece (22) below the hand member (2), and then the hand member (2) is held. Rotate to replace the upper and lower workpieces. And
The next work (A ') is reattached to the spindle (1) and the other surface of the work is turned, while the hand member (2) raises this and then the work (A) that has finished double-sided turning is worked. It is transferred to the receiving device (8) and conveyed to the next step. Next, a new unprocessed work is supplied from the work supply device (6) to the upper work holding claw piece (22) in the empty state of the hand member (2), and the same operation is performed thereafter.

[0020]

As described above, according to the present invention, the step of transferring the one-sided turned work from the lathe spindle to one end of the hand member having the work holding portions at both ends, and the hand member is orthogonal to the axial direction of the spindle. By rotating in the plane, the one-sided turned work is separated from the spindle, while the next work previously supplied to the other end of the hand member is moved to the spindle side, and the next work is performed. A single-sided turning of the work is performed by mounting the work on the main spindle, and a step of reversing the one-sided turned work held at one end of the hand member by the end of the turning, and the following one-sided turned work is the hand member. After being transferred to the other end of the main shaft, the hand member is rotated again in a plane orthogonal to the axial direction of the main shaft to separate the next work from the main shaft, while the inverted work is moved to the main shaft. A step of moving to the side, the inverted workpiece by re-attached to the spindle, it is characterized in that the other surface of the workpiece carrying out the step of turning. Thus, in the present invention, a hand member for holding a work is provided at both ends in the length direction, and the work held at one end of this hand member is turned from the other end of the hand member during turning of another work attached to the lathe spindle. Since the work is turned upside down and made to stand by, the turning of the work can be continued at all times even during the turning up operation, so that the work can be turned smoothly one after another. As a result, the number of workpieces turned per unit time can be increased, and productivity can be improved.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing an example of a lathe used to carry out the present invention.

FIG. 2 is a plan view of the main part of the same.

[Explanation of symbols]

 1 ... Spindle 2 ... Hand members 22, 23 ... Work holding claw pieces (work holding part)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Eihito Matsui 6-224 Kaiyamacho, Sakai City, Osaka Prefecture Showa Aluminum Co., Ltd.

Claims (1)

[Claims] 1. A step of transferring a one-sided turned work (A) from a lathe spindle (1) to one end of a hand member (2) having work holding parts (22) (23) at both ends, and the hand member (2). ) Is rotated in a plane orthogonal to the axial direction of the main shaft (1) to separate the one-sided turned work (A) from the main shaft, while supplying it to the other end of the hand member (2) in advance. Next work (A ')
Moving the workpiece to the spindle side, and mounting the next work (A ′) on the spindle (1) to perform one-sided turning of the work, and by the end of this turning, one end of the hand member (2) The step of reversing the one-sided turned workpiece (A) held on the one side, and the following one-sided turned workpiece (A ') being transferred to the other end of the hand member (2), the hand member (2) Step of moving the next work (A ') away from the spindle (1) and rotating the inverted work (A) toward the spindle by rotating the workpiece (A') again in a plane orthogonal to the axial direction of 1). And reattaching the inverted work (A) to the spindle (1),
And a step of turning the other surface of the work (A), the method for double-sided turning of a plate-like work.