JPH06155206A - Machine tool - Google Patents

Abstract

PURPOSE:To provide a working device in which a lengthy work can be easily rotated so as to change the direction of a face to be worked. CONSTITUTION:In this working device 1, a plurality of holding tools 3 to hold works at different positions in the lengthwise direction of the work so that the holding tools can be individually adjusted in their positions in the lengthwise direction of the work, and indexing means 13,21 to simultaneously index and rotate the holding tools around an axis in parallel with the lengthwise direction of the work are provided. Hereby, the holding tools can be rotationally moved so as to quickly change the direction of the face to be worked of the work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool for cutting or grinding a long work piece.

[0002]

2. Description of the Related Art Conventionally, there is a machine tool for machining a long work piece. This is a device for cutting or grinding a long work such as a frame member made of aluminum sash on a table with, for example, a drill or a reamer. Here, in the case of a work having a length of about 6 m such as a large-sized aluminum sash frame material, even if the user tries to rotate by holding the tip, the torsional load is absorbed and the work cannot be easily rotated. If the work is forcibly twisted, the work may be distorted. Therefore, when rotating the work, first, the fixing device holding the work is removed, and the worker lifts the work by two or more persons to rotate the work and fix it again to the holding tool.

[0003]

However, it is troublesome and very inefficient to remove the fixing tools one by one to change the machining position, lift and rotate the work, and fix the work again.

An object of the present invention is to provide a machine tool that can easily rotate a long object.

[0005]

In order to solve the above-mentioned problems, the present inventor has proposed a plurality of machine tools for machining a long work, which hold the work at different positions in the longitudinal direction of the work. The gripping tool is provided, and the position of the gripping tool can be adjusted individually in the longitudinal direction of the work,
The gripping tool is provided with indexing means for indexing and rotating the gripping tool around an axis parallel to the longitudinal direction of the workpiece.

[0006]

With the above structure, a long work is positioned by a plurality of gripping tools, and the work is processed.
Then, while the work is fixed by the gripping tool, the work surface is changed by rotating about the axis parallel to the longitudinal direction of the work as the rotation center. Further, the gripping tools can be individually adjusted in position to grip the optimum position of the work.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a processing apparatus according to the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, FIG. 2 and FIG. 3, a first rail portion 5 is arranged on the frame 4 of the machine tool 1 so as to extend in the X-axis direction. The machine tool body 2 is supported on the first rail portion 5. The machine tool body 2 can be moved along the first rail portion 5 by driving a motor (not shown).

The head 7 is arranged on the upper part of the machine tool body 2 and can be reciprocated in the Y-axis direction by a motor (not shown). A tool 8 is attached to the head 7, and is driven by a motor 35 at the upper end of the head 7 to rotate for cutting. The tool 8 is reciprocated in the Z-axis direction by a motor (not shown).

On the front side of the first rail portion 5, the first rail portion 5 is provided.
A second rail portion 6 is arranged in parallel with the rail portion 5 of the. Five clamp devices 3 as gripping tools are arranged on the second rail part 6 at predetermined intervals, and these clamp devices 3 are moved along the second rail part 6 to be adjusted in position. The clamp devices 3 are respectively supported on the second rail portion 6 via guides 29 attached to the back surface of the base 10.

A first solenoid 1 is provided on the back surface of the base 10.
2 are provided. A locating pin 13 protruding upward is fixed to the armature 30. A pair of left and right first brackets 14 are provided at the center of the base 10 so as to project. A bearing 15 is fixed to the first bracket 14 near its upper portion. A single rotation transmission shaft 16 extending in the X-axis direction is rotatably inserted through the bearing 15 of each clamp device 3. A first sprocket 17 is fixed to the rotation transmission shaft 16 so as to correspond to each clamp device 3.

A second bracket 22 is projectingly provided on the lower rear side of the base 10. A bearing 23 is fixed to the second bracket 22. One drive transmission shaft 9 is rotatably inserted through the bearing 23 of each clamp device 3. The drive transmission shaft 9 has a spline groove formed,
The clamp device 3 is rotated by a motor 34 shown in FIG. 1 via a gear transmission mechanism (not shown) so as to rotate in synchronization with each other.

A drive transmission shaft 9 corresponding to each clamp device 3.
A second sprocket 24 is attached to the. A roller chain 32 is wound between the first sprocket 17 and the second sprocket 24, and the driving force from the drive transmission shaft 9 is transmitted to the rotation transmission shaft 16. An idle sprocket 28 is attached to the base 10 between the first sprocket 17 and the second sprocket 24.

The clamp device body 11 is supported by the first bracket 14 so as to be integrally rotatable together with the rotation transmission shaft 16. A lower portion of the clamp device body 11 is formed in a semicircular shape for maintaining balance, and an upper portion thereof is a clamp portion 18. The clamp part 18 is formed in a U shape as a whole, and has a fixed part 19a and a movable part 19b.
It is composed of and. The elongated work W is gripped by the clamp portion 18 so that its longitudinal direction is along the X axis. That is, the movable portion 19b is slidable between the fixed portion 19a and the opposite side thereof by the action of the cylinder 20, so that the work W sandwiched between the fixed portion 19a and the movable portion 19b is grasped and fixed. Has become.

On the outer periphery of the lower semi-circular portion of the clamp device body 11, there are formed three recesses 21 at 90 ° intervals into which the tips of the locate pins 13 are inserted when they are projected. Therefore, the clamp device body 11 is indexed by 90 degrees by the engagement of the locate pin 13 and the recess 21. The locating pin 13 and the recess 21 constitute an indexing means.

A rack 25 extending along the second rail 6 is fixed to the frame 4. Further, as shown in FIGS. 4 and 7, a lock claw 26 is provided in the lower portion of the base 10, and is located between a position where the second solenoid 27 engages the rack 25 and a position where the rack 25 disengages. Can be moved. When the lock claw 26 meshes with the rack 25, the clamp device 3 is locked immovably in the X-axis direction. A stopper 33 for determining the reference of the work W in the X-axis direction is arranged at the right end of the upper mount 4 in FIG.

Next, the operation of this embodiment thus constructed will be described. First, the worker arranges the respective clamp devices 3 along the X-axis direction at desired intervals in a well-balanced manner according to the length of the work W and the processing position of the work W. Here, each clamp device 3 is slid along the longitudinal direction of the drive transmission shaft 9 for positioning, and the work W is set by abutting the base end thereof against the stopper 33.
Next, when the arrangement of each clamp device 3 is completed, the second solenoid 27 is excited to lock the rack 25 with the lock claw 26.
To clamp each clamp device 3. At the same time, the first solenoid 12 is excited at the position of (a) in FIG. 6, the locate pin 13 is projected, the clamp device body 11 is fixed at a required indexing position, and the recess 21 is fitted.
Next, the work W is placed on the clamp portion 18 of each clamp device 3, and the cylinder 20 is operated to hold the work W by the clamp portion 18. With the above, the work W on the clamp device 3
Gripping is completed.

When a machining program corresponding to the work W is selected, the machine tool main body 2 cuts the work W with the tool 8 from the original position (the position shown in FIGS. 1 and 2) under the control of a CPU (central control unit) not shown. Start processing. For example, when the cutting of the work W at the position a shown in FIG. 6 is completed, it may be necessary to cut the work W from another surface. That is, in FIG. 6, the work W is cut at the indexing position of B or C rotated 90 degrees back and forth around the rotation transmission shaft 16 extending in the X-axis direction.
In this case, first, the first solenoid 12 is de-excited and the locate pin 13 is retracted to eliminate the fitting relationship with the recess 21.

Subsequently, the motor 34 is driven to rotate the drive transmission shaft 9. Then, the second sprocket 24 is rotated together with the drive transmission shaft 9, and the driving force is transmitted to the first sprocket 17 by the roller chain 32. Since the first sprocket 17 is mounted on the rotation transmission shaft 16, the rotation transmission shaft 16 is rotated in the same direction as the drive transmission shaft 9 together with the first sprocket 17. As a result, the clamp device main body 11 of each clamp device 3 simultaneously rotates in the same direction while synchronizing with the axis of the rotation transmission shaft 16 as the rotation center.

The respective clamp device main bodies 11 are rotated 90 degrees rearward from the position (a) shown in FIG. 6 and stopped, and the work W is held at the position (b). Then, in this state, the first solenoid 12 is excited again,
The locating pin 13 is projected and fitted into the recess 21, and the clamp device body 11 is fixed. Machine tool body 2
Is the tool 8 so that it corresponds to the upper surface side of the work W at the position of B.
The position of is corrected and the work W is cut.

Then, when cutting is performed so that the clamp device body 11 is arranged at the position of c after the position of b, the clamp device body 11 is rotated and fixed in the same order as described above.

As described above, in this embodiment, the plurality of clamping devices 3 are arranged, and the work W can be supported without difficulty. Further, since it is slidable to the left and right, it is possible to set the gripping position to an optimum position according to the length of the work W and the processing position. Therefore, the work can be performed efficiently. Moreover, the clamp device body 11
Rotate at the same angle in the same direction all at a predetermined clamp position, so that the work W is hardly deformed because a torsional load is hardly applied to the work W.

Furthermore, since the clamp device 3 is fixed by the engagement relationship between the rack 25 and the lock claw 26, it is not necessary to fix the clamp device 3 with another fastening tool or the like, and work efficiency is greatly improved.

Although one embodiment of the present invention has been described above in detail, the present invention is not limited to the above embodiment and can be carried out by changing to other modes. For example, in the above embodiment, the concave portions 21 of the clamp portion 18 into which the locate pin 13 is fitted in order to secure the three indexing positions are formed at three places, but this is not limited to three places. It may be formed in two or less places, or may be formed in four or more places.

Further, although the clamp portion 18 has a structure in which the inner surface is formed in a U-shape and has the fixed portion 19a and the movable portion 19b, the clamp portion 18 is of course not limited to this type. For example, the fixed portion 19a and the movable portion 19b may be configured to only face each other in parallel. In addition, the present invention is free to be modified and implemented without departing from the spirit of the present invention, such as the working means including various processes such as cutting and grinding.

[0025]

As described in detail above, a plurality of grippers for gripping the work are provided at different positions in the lengthwise direction of the work, and the grippers can be positionally adjusted in the lengthwise direction of the work. Since the indexing means for indexing and rotating the gripping tool all around the axis parallel to the longitudinal direction of the work is provided, the work can be reliably gripped, and the turning of the gripping tool allows the work surface of the work to be quickly rotated. You can change the orientation.

[Brief description of drawings]

FIG. 1 is a front view showing an entire machine tool that is an embodiment of the present invention.

FIG. 2 is a plan view showing an entire machine tool in the same embodiment.

FIG. 3 is a right side view showing the entire machine tool in the same embodiment.

FIG. 4 is a right side view illustrating a clamp device for a machine tool in the same embodiment.

FIG. 5 is a partially cutaway front view illustrating a clamp device for a machine tool in the same embodiment.

FIG. 6 is a simplified right side view illustrating an operating state of the clamp device for a machine tool according to the same embodiment.

FIG. 7 is a plan sectional view illustrating a structure of a rack of a machine tool in the same embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Machine tool, 3 ... Clamping device as a grasping tool, 13 ... Rocket pin as an indexing means, 21 ... Recessed part as an indexing means, W ... Work.

Claims (1)

[Claims] 1. A machine tool for processing a long work piece, wherein a plurality of gripping tools for holding the work piece are provided at different positions in the longitudinal direction of the work piece, and the gripping tools are individually provided in the longitudinal direction of the work piece. A machine tool that is position-adjustable and that is provided with indexing means for indexing and rotating the gripping tool all around an axis parallel to the longitudinal direction of the workpiece.