JPH07332315A - Servo positioning cylinder device and end part finishing machine having the same - Google Patents

Abstract

PURPOSE:To provide a servo positioning cylinder and an end part finishing machine having the cylinder, by which precise remote positioning adjustment can be made, and the manufacturing cost increase can be minimized. CONSTITUTION:A servo positioning cylinder l comprises a cylinder main body having a direct acting cylinder rod 11, and a servo positioning means 5 for fixing the forward movement end and backward movement end of the cylinder rod 11. The cylinder output is caused by the cylinder main body which is a general cylinder (oil pressure, air pressure, a screw feed and so on). Positioning of the forward movement end of the cylinder main body is performed by a servo mechanism. Accordingly, it is not necessary to make the whole of the cylinder in servo system, the manufacturing cost of a cylinder is remarkably low. Concerning positioning, the advantages (precision, automaticity) of the servo mechanism can be taken in enough.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a servo positioning cylinder device capable of precisely positioning the forward end of a cylinder rod or the like. In particular, use a servo mechanism such as a servo motor only as an actuator for positioning,
The present invention relates to a servo-positioning cylinder device that reduces the cost as a whole by using an inexpensive actuator such as hydraulic pressure or pneumatic pressure for the output of the cylinder body itself. Furthermore, it relates to an end working machine having such a servo positioning cylinder device. The edge processing machine is a machine for processing the end surface of the material to be processed and the outer surface and inner surface of the periphery thereof, and includes so-called double-end processing machines and single-end processing machines.

[0002]

2. Description of the Related Art A conventional technique will be described by taking a head feed cylinder of an end processing machine as an example. FIG. 2 is a side view showing a processing head portion of an end processing machine having a conventional head feed cylinder. The edge processing machine of FIG.
Rotate the bite 9 that rotates the end 63 of (pipe material, bar material, etc.)
1 is a machine tool for machining.

The machining spindle head 9 comprises a blade mounting disk 92 and a rotary spindle 9 for supporting this disk.
7. A spindle head main body 93 containing a bearing for supporting the spindle 97, a spindle driving motor 9
4. A belt 95 for transmitting the rotation of the motor 94. The spindle head main body 93 is mounted on the head slide base 96, and is driven by the head feed cylinder 99 on the guide plate 31 back and forth in the drawing. By this drive, the cutting tool 91 is fed in the axial direction of the workpiece 61, and the processing dimension of the end portion 63 of the workpiece 61 is determined.

A head feed cylinder 99 for moving the machining spindle head 9 shown in FIG. 2 back and forth is attached to the tie plate 33 at the rear end of the guide plate 31 (bolt fastening, etc.). Head feed cylinder 99
The cylinder rod 11 of the head slide base 96
Is connected with.

Next, the positioning mechanism for the forward end of the feed of the machining spindle head 9 will be described. The cylinder rod 11 has a long rear portion inside the cylinder 99 (on the right side of the drawing).
And extends from the end cover 23 on the rear portion (opposite head side) of the cylinder 99 to the rear portion. A positioning member 41 is screwed into the protruding portion (rod tail end 25) (a screw is not shown). When the cylinder rod 11 is extended forward, the positioning member 41 also advances forward, and finally comes into contact with the stopper surface 24 which is the end surface of the end cover 23. At this point, cylinder rod 1
1, the forward end of the machining spindle head 9 is determined. (Positioned). The positioning adjustment is performed by adjusting the screwing position of the positioning member 41 with respect to the tail end portion 25 of the rod.

[0006]

In such a conventional head feed cylinder, the positioning adjustment is performed manually. Therefore, the operator of the processing machine needs to stop the processing machine and adjust the positioning member, which is troublesome and leads to a reduction in work efficiency.

On the other hand, as a matter of course, a servo cylinder whose feed position can be precisely adjusted by remote control has been known from the past. For example, a ball screw driven by a servo motor while precisely controlling the phase, a hydraulic servo cylinder having a position measurement feedback system, or the like. However, if such a servo cylinder is used for the head feed cylinder, it is extremely expensive (5 to 10 times) as compared with a general hydraulic cylinder, and thus the manufacturing cost of the processing machine is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a servo positioning cylinder device capable of performing precise remote positioning adjustment and suppressing an increase in manufacturing cost as much as possible, and an end processing machine having the same.

[0009]

In order to solve the above-mentioned problems, a servo positioning cylinder device of the present invention comprises a cylinder body having a direct acting cylinder rod, and servo positioning means for defining a forward end or a backward end of the cylinder rod. And is provided.

In the edge processing machine according to one aspect of the present invention,
The cylinder body includes a cylindrical cylinder body having a front cover and an end cover at both ends, and the cylinder rod is provided so as to penetrate both covers of the cylinder body, and one end (operating end) of the cylinder rod. Is an output part of the cylinder, a positioning member is attached to the other end (tail end) of the cylinder rod, and a stopper that abuts when the positioning member moves linearly forward together with the cylinder rod. The position of the positioning member or the stopper can be adjusted by the servo positioning means.

The end processing machine of the present invention is an end processing machine having a processing spindle head for processing the end of a workpiece; the processing spindle head is in the axial direction of the workpiece. The driving means for feeding to the servo positioning cylinder device according to claim 1 or 2.

[0012]

In the servo positioning cylinder device of the present invention, the output of the cylinder is
It is caused by the cylinder body which is pneumatic, screw feed etc.). However, the servo mechanism positions the forward end of the cylinder body. Therefore, since it is not necessary to servo the entire cylinder, the manufacturing cost of the cylinder can be significantly reduced. Regarding the positioning, the advantages (precision and automation) of the servo mechanism can be fully taken into consideration.

End processing machines, especially long members (diameter: length 5
In the end processing machine for processing (up to 10 times or more), the positioning accuracy of the processing spindle head is important. This is because the positioning accuracy determines the length accuracy of the workpiece. Therefore, the accuracy of positioning the forward end of the feed of the processing spindle head of the end processing machine is required. In addition, when the temperature of the processing machine, the processing spindle head and the work material, and other factors related to the processing change, the finished length of the work material changes delicately. It is necessary to adjust the end position to maintain the dimensional accuracy of the work material.

Since the frequency of such adjustment work is relatively high, it is preferable to shorten the downtime of the processing machine due to the adjustment work. Further, in order to overcome the cutting reaction force applied to the processing spindle head, it is required that the driving force of the head feed cylinder is large to some extent.
Under the above-mentioned environment, it is advantageous to provide the servo positioning cylinder device of the present invention as the feed driving means of the machining spindle head of the end processing machine.

[0015]

EXAMPLES Examples of the present invention will be described below. Figure 1
It is a sectional view showing a servo positioning cylinder device (for an end processing machine head feed cylinder) concerning one example of the present invention. The servo positioning cylinder device 1 of FIG. 1 is roughly divided into a cylinder body 3 and servo positioning means 5. The cylinder body 3 is a general hydraulic cylinder. Cylinder body 3 is cylinder rod 1
1, a front cover 15, a cylinder tube 17, a piston 19, an end cover 23 and the like.

The cylinder rod 11 extends through the front cover 15, the cylinder tube 17, and the center of the end cover 23 in the front-rear direction. Cylinder rod 1
The front end of 1 (on the side of the processing head) is an operating end 13 having a male thread. The working end 13 is connected to the machining spindle head 9, and the cylinder rod 11
The machining spindle head 9 is fed back and forth according to the movement of the.

An internal space defined by the front cover 15, the cylinder tube 17, and the end cover 23 (collectively referred to as a cylinder body) is an oil chamber of the cylinder. Hydraulic pressure is supplied to the oil chamber through the oil holes 16 and 22, and the piston 19 fixed to the cylinder rod 11 with the nut 21 is driven back and forth. Cylinder rod 1
1 and the front and rear covers 15, 23, the front and rear covers 15,
O-ring 20 between 23 and cylinder tube 17
The oil pressure is sealed by. A dust seal 14 is also provided between the cylinder rod 11 and the front and rear covers 15 and 23.

The rear end portion of the cylinder rod 11 projects outward (opposite the processing head) from the cylinder body (end cover 23). Part of the protrusion (tail end 25)
A male screw 27 is cut on the outer surface of the. This male screw 2
A positioning nut 42 is screwed onto the shaft 7. A spline cylinder 43 is fixed to the outer periphery of the positioning nut 42. A spline 45 extending in the front-rear direction is cut on the outer peripheral surface of the spline cylinder 43. This spline 45
The gear 51 is engaged with the gear 51, and the gear 51 is rotationally driven by the servo motor 53.

Positioning nut 42 and spline cylinder 43
Constitute the positioning member 41. Cylinder rod 1
When 1 is fed forward, the positioning member 41 also moves forward, and finally the front end surface of the positioning member 41 and the outer end surface (stopper surface 24) of the end cover 23 come into contact with each other. At this point, the forward end (leftward end) of the cylinder rod 11 is determined (positioned). This means that the forward end (cutting end) of the processing head 9 is also determined.
It should be noted that when the positioning member 41 moves back and forth, the spline 45 and the gear 51 slide with respect to each other and neither rotate nor interfere with each other.

Next, when it is desired to change (adjust) the positioning of the forward end of the cylinder rod 11, the servomotor 5
3 is rotated by a predetermined phase, and the gear 51 is rotated. Then,
The spline 45 meshing with the gear 51 also rotates, and the positioning nut 42 eventually turns. On the other hand, since the cylinder rod 11 is non-rotatably attached to the processing head 9 (by a lock nut or the like), the male screw 27 on the outer periphery of the tail end portion 25 of the cylinder rod does not rotate. Therefore, the positioning member 41 moves back and forth. Therefore, since the distance between the stopper surface 24 and the positioning member 41 changes, the positioning of the forward end of the cylinder rod 11 can be adjusted.

The servo motor 53 is provided with a known rotation phase detector, control circuit, remote or automatic operation means, and the like. The cylinder body and the servo motor 53 are fixed to the tie plate 33 and the set plate 35 by known means (bolts or the like).

In addition to the embodiment shown in FIG. 1, the following embodiment can be considered. That is, it is also possible to provide a servo positioning means for determining the rearward moving end (the end opposite to the head) of the cylinder rod. Instead of the positioning member 41, the position of the stopper surface 24 (stopper) can be moved and adjusted by a servo mechanism. The positioning member 41 can be linearly driven by a hydraulic servo cylinder or the like.

[0023]

As is apparent from the above description, the servo positioning cylinder device of the present invention and the end processing machine having the same have the following effects. The manufacturing cost is much lower than when the entire cylinder is servo-controlled (needs a large servo device). Regarding the positioning function such as the forward end, the advantages of the servo mechanism can be fully incorporated. Compared to the case where the entire cylinder is servo-controlled, it is not necessary to make the sliding surface of the processing spindle head smoother than necessary. In such a case, sliding and the like must be performed so that the sliding surface of the machining spindle head becomes extremely smooth. It is possible to provide an end processing machine that can easily and finely adjust the length of a work material. Further, it is possible to provide an edge processing machine that can endure heavy cutting with a small servo device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a servo positioning cylinder device (for an end processing machine head feed cylinder) according to an embodiment of the present invention.

FIG. 2 is a side view showing a processing head portion of an end processing machine having a conventional head feed cylinder.

[Explanation of symbols]

1 Servo Positioning Cylinder Device 3 Cylinder Body 5 Servo Positioning Means 9 Machining Spindle Head 11 Cylinder Rod 13 Working End 14 Dust Seal 15 Front Cover 16 Oil Hole 17 Cylinder Tube 19 Piston 20 O-ring 21 Nut 22 Oil Hole 23 End Cover 24 Stopper Surface 25 tail end 27 male screw 31 guide plate 33 tie plate 35 set plate 41 positioning member 42 positioning nut 43 spline tube 45 spline 51 gear 53 servo motor 61 work material 63 end 91 bytes 92 blade mounting disk 93 spindle head body 94 motor 95 belt 96 head slide base 97 spindle 99 head feed cylinder

Claims (3)

[Claims] 1. A servo positioning cylinder device comprising: a cylinder body having a direct acting cylinder rod; and servo positioning means for defining a forward end or a backward end of the cylinder rod. 2. The cylinder body includes a cylindrical cylinder body having a front cover and an end cover at both ends, and a cylinder rod is provided so as to penetrate both covers of the cylinder body, and one end of the cylinder rod. (Operating end) is the output part of the cylinder,
A positioning member is attached to the other end (tail end) of the cylinder rod, and a stopper is provided that abuts when the positioning member linearly advances with the cylinder rod. Positioning member or position of the stopper The servo positioning cylinder device according to claim 1, wherein is adjusted by said servo positioning means. 3. An end processing machine having a processing spindle head for processing an end of a workpiece; drive means for feeding the processing spindle head in the axial direction of the workpiece. An end processing machine having the servo positioning cylinder device according to 1 or 2.