JP2001129710A - Both end finishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a both end finishing machine capable of easily cooing with the alteration even when travel length of a rotary cutting unit is altered, and lengthening the effective stoke of the rotary cutting unit. SOLUTION: In a both end finishing machine formed so both end parts of a work W clamped by a vise mechanism are machined by a pair of rotary cutting units 6 which are arranged on both opposite sides of the vise mechanism, and which can be respectively advanced and retracted in relation to the both end machining positions of the work W, an advancing and retracting motion driving means 10 for the respective rotary cutting units 6 is made up of a guide part 12 for guiding the movement of the rotary cutting units 6, a ball screw mechanism 13 for reciprocating the rotary cutting units 6 along the guide part 12, and a servomotor 15 for rotating the screw shaft 14 of ball screw mechanism 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a tubular or solid workpiece cut in advance to a predetermined length and clamped by a vice mechanism, with both ends of the work being opposed to both sides of the vise mechanism. The present invention relates to a two-end processing machine configured to perform processing by a pair of rotary cutting units that can move forward and backward with respect to processing positions at both ends of the work.

[0002]

2. Description of the Related Art In a conventional double-end processing machine, a rotary cutting unit is driven by a hydraulic cylinder, and when processing an end of a work, the moving length of the rotary cutting unit with respect to the end processing position of the work. The stroke reciprocates between the forward limit position and the retreat limit position of the stroke corresponding to the length of the workpiece because the forward limit position and the retreat limit position are respectively set by stoppers. When the moving length of the rotary cutting unit is changed due to the change, it is necessary to change and adjust the position of the stopper for setting the forward end position every time the change is made. The cylinder type driving means has a problem that the effective stroke of the rotary cutting unit cannot be made too long.

[0003] It is an object of the present invention to provide a double-sided processing machine which can easily cope with a change in the moving length of the rotary cutting unit and can increase the effective stroke of the rotary cutting unit. And

[0004]

The invention according to claim 1 is
Both ends of a tubular or solid workpiece W clamped by the vice mechanism 1 are disposed opposite to both sides of the vise mechanism 1 so as to be able to move forward and backward with respect to the processing positions at both ends of the work W, respectively. In the double-end processing machine configured to perform processing by the rotary cutting unit 6, the advance / retreat driving unit 10 of each rotary cutting unit 6 guides the movement of the rotary cutting unit 6, and the guide unit 12 moves along the guide unit 12. A ball screw mechanism 13 for reciprocating the rotary cutting unit 6 and a screw shaft 1 of the ball screw mechanism 13
And a servo motor 15 for rotating the motor 4.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view showing a double-end processing machine.
FIG. 2 is a vertical sectional front view of the both-end processing machine. In these figures, reference numeral 1 denotes a vice mechanism. The vice mechanism 1 is connected to a fixed vice table 2 and a movable vise table 3 which are disposed opposite to the left and right sides via a pair of mounting members 4 and 4, respectively. Split ring-type vice jaws 5 are attached, and a pair of half ring-type vice jaws 5 and 5 are used to clamp a tubular workpiece W (or a solid workpiece) from both right and left sides. It has become.

The pair of half ring-shaped vice jaws 5,
5 forms a clamp interference (gap) S between the opposing end surfaces of the two vice jaws 5 and 5 when the work W is externally clamped and clamped from both left and right sides. As can be seen from FIG. 1, a pair of rotary cutting units 6 and 6 are disposed at opposing positions on both sides of the vice jaws 5 and 5 of the vice mechanism 1. The workpiece W is clamped at the both ends to process both ends thereof, and is movable in the axial direction of the workpiece W.

As shown in FIG. 2, the movable vise table 3 of the vice mechanism 1 is supported by a support frame 7 so as to be horizontally movable, and is linked to a hydraulic cylinder 8 provided on the support frame 7. Thus, the hydraulic cylinder 8 is moved toward and away from the fixed vise table 2 by the expansion and contraction operation of the hydraulic cylinder 8. The fixed vise table 2 is supported by the support frame 9, but the work W is rotated by the vice jaws 5, 5 attached together with the movable vise table 3 via the mounting members 4, 4 to the rotation axis O of the rotary cutting unit 6. In order to be able to clamp above, the distance movement adjustment is possible with respect to the rotation axis O.

As shown in FIGS. 3 to 5, each rotary cutting unit 6 is reciprocally driven in parallel to the axial direction of the workpiece W clamped by the vice mechanism 1 on the base frame 11 by the reciprocating drive means 10. The reciprocating drive means 10 is provided on a base frame 11 and guides the movement of the rotary cutting unit 6. A ball screw mechanism 13 for reciprocating the rotary cutting unit 6 along the axis, and a servo motor 15 for driving a screw shaft 14 of the ball screw mechanism 13 to rotate.

One end of the screw shaft 14 of the ball screw mechanism 13 is supported by a bearing 23 fixed to one end of the base frame 11, and the other end of the screw shaft 14 is connected to the other end of the base frame 11. The screw shaft 14 is supported at its end by a bearing 24 slidably supported in the axial direction of the screw shaft 14. Then, a nut member 16 screwed to the screw shaft 14 is fixed to a movable base 17 of the rotary cutting unit 6. The screw shaft 14 is servomotor driven by a transmission means 28 including timing pulleys 25 and 26 and a timing belt 27. 15 and are linked. The servo motor 15 is controlled by a control device 30. The servo motor 15 is provided with a rotary encoder 29 for detecting a rotation amount of the screw shaft 14 due to the rotation of the servo motor 15.

Therefore, by appropriately controlling the servo motor 15 by the control device 30, the rotary cutting unit 6 can be set to an arbitrary moving stroke St within its maximum moving range.

As shown in FIGS. 1 and 3, each rotary cutting unit 6 has a rotary spindle 31 driven by a motor 19 in a unit casing 18 fixed on a movable base 17. An end machining tool such as a chamfering tool 20 for machining an end of the work W is detachably attached to a tip end of the work 31.

When using the double-sided processing machine configured as described above, first, the work W to be processed is first set in the vice mechanism 1.
To clamp in place. That is, a pair of half ring-shaped vice jaws 5, 5 corresponding to the workpiece W to be machined are mounted on the fixed vice table 2 and the movable vice table 3 via the mounting members 4, 4, respectively. The work W is clamped by the two vice jaws 5 and 5 in the state shown in FIGS. 6 and 7 while the movable vice base 3 is moved closer to the fixed vise base 2 by the extension operation. Also,
For example, chamfering tools 20, 20 are mounted on the rotating spindles 30 of the two rotary cutting units 6, 6, respectively.

Thus, the two rotary cutting units 6, 6
The workpiece W clamped by the vise mechanism 1 is moved forward and backward by the advance / retreat driving means 10 to the processing positions at both ends of the workpiece W, thereby chamfering both ends of the workpiece W. At this time, each rotary cutting unit 6 starts a preset movement stroke St (see FIG. 3) from the retreat limit position and performs the chamfering with the chamfering tool 20 slightly before reaching the forward limit position. Finish machining at the forward limit position.

As described above, in the double-end machining machine according to the present invention, the reciprocating drive means 1 of each rotary cutting unit 6 is provided.
0 is a guide portion 12 for guiding the movement of the rotary cutting unit 6, and the rotary cutting unit 6
A ball screw mechanism 13 for reciprocating the ball screw mechanism, and a servo motor 15 driven by a control device 30 for rotating a screw shaft 14 of the ball screw mechanism 13, the servo motor 15 is connected to the control device 30. , The rotary cutting unit 6 can be set to an arbitrary moving stroke St. Therefore, when the length of the work W is changed (feed amount),
The moving length (moving stroke) of the rotary cutting unit according to the change of the length can be easily and easily set. That is, when the length of the work W is changed, the rotary cutting unit 6 is set to a new moving stroke by inputting a numerical value such as the new length (feed amount) using the ten keys on the operation panel. You can fix it.

Further, according to the advance / retreat drive means 10 comprising such a ball screw mechanism 13, the effective stroke of the rotary cutting unit 6 can be made longer than in the conventional advance / retreat drive means employing a hydraulic cylinder.

[0016]

According to the double-end machining apparatus according to the first aspect of the present invention, the forward / backward drive means of each rotary cutting unit reciprocates the rotary cutting unit along the guide portion, and the ball screw mechanism. Since the motor consists of a motor that rotates the screw shaft, the rotary cutting unit can be set to an arbitrary moving stroke by appropriately controlling the servo motor by the control device, and thus the length of the work is changed. Then, the moving length (moving stroke) of the rotary cutting unit according to the change of the length can be easily and easily set without performing a complicated adjustment work as in the related art.

Further, according to the advance / retreat drive means comprising such a ball screw mechanism, the effective stroke of the rotary cutting unit can be made longer than in the conventional advance / retreat drive means employing a hydraulic cylinder.

[Brief description of the drawings]

FIG. 1 is a plan view showing a double-end processing machine.

FIG. 2 is a vertical sectional front view of the double-end processing machine.

FIG. 3 is a side view showing a rotary cutting unit.

FIG. 4 is a front view of the rotary cutting unit.

FIG. 5 is a sectional view taken along line XX of FIG. 3;

FIG. 6 is a partially enlarged plan view of the both-end processing machine shown in FIG. 1;

FIG. 7 is a sectional view taken along line YY of FIG. 6;

[Explanation of symbols]

 W Work 1 Vice mechanism 2 Fixed vise table 3 Movable vise table 4 Attachment member 5 Half-ring vice jaw 6 Rotary cutting unit 10 Reciprocating drive means 11 Base frame 12 Guide section 13 Ball screw mechanism 14 Screw shaft 15 Servo motor 20 Chamfering tool 29 rotary encoder 30 controller 31 rotary spindle of rotary cutting unit

Claims (1)

[Claims] A pair of opposite ends of a tubular or solid workpiece clamped by a vice mechanism are disposed on both sides of the vice mechanism so as to be capable of moving forward and backward with respect to both ends processing positions of the work. In a double-end processing machine configured to perform processing by the rotary cutting unit, the reciprocating drive means of each rotary cutting unit guides the movement of the rotary cutting unit, and reciprocates the rotary cutting unit along the guide. A ball screw mechanism to move,
A double-ended machining machine comprising a servomotor for rotating a screw shaft of the ball screw mechanism.