JPH08290222A - Hydraulically operated machine tool - Google Patents

Abstract

PURPOSE: To provide a hydraulically operated machine tool for executing plural numbers of machining with one machine tool. CONSTITUTION: A die set holder is revolved in the state where a die set is mounted on the die set holder 6 which is freely rotatably provided on a column and the die set needed is moved just under a hydraulic driving device. When a fixing device 9 which is pivotally attached to a base 1 is erected at this time, the die set is fit into a groove 7 part where is formed at the tip of the die set holder. In such a way, the die set is positioned. In this state, by screwing the screw 10 of the fixing device 9, the die set holder 6 is moved to the lower part and firmly fixed to the base. When a work W is set in the die set 20 and the hydraulic diving device 5 is driven, a prescribed machining is applied to the work. When working is completed, the fixing device 9 is released, the die set holder 6 is again revolved, the die set 20 used for the next machining stage is fixed under the hydraulic driving device 5 and the next machining is executed by repeating the same operation as the above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulically driven machine tool capable of performing a plurality of processes with a single machine tool, and more specifically, a die set capable of fixing a plurality of die sets to a column of the machine tool. The holder is rotatably installed, and while rotating the die set holder, select the required die set and fix it on the base of the machine tool, and operate the hydraulic drive attached to the frame side to this die set. The present invention relates to a hydraulically driven machine tool capable of performing a predetermined machining on a work.

[0002]

2. Description of the Related Art Conventionally, hydraulically driven machine tools capable of performing a plurality of processes with a single machine tool are described in Japanese Utility Model Publication No. 54-163147 and Japanese Utility Model Publication No. 2-114132. It has been known. 54-
Japanese Patent No. 163147 has a structure in which a cutting device is provided in a main body having a ram that is hydraulically operated, and a notch device and a bending device are provided in a movable body that operates integrally with the ram. By doing so, it is possible to perform a plurality of processes. In Japanese Utility Model Laid-Open No. 2-114132, various dies are configured to be attachable to and detachable from the base of a machine tool, and a die set corresponding to the required machining is attached to the machine tool to perform work. There is.

[0003]

However, in the former machine tool, since the cutting device, the notch device and the bending device move simultaneously by the operation of the ram, a cover is provided around each device. In addition to the high cost of the product, there is a problem that the work efficiency is poor because the worker has to move to the front of the processing device to perform the work of processing each work. Further, in the latter machine tool, it is necessary to replace the die set every time the contents of the machining work change, and it takes time to replace the die set and the work is difficult.

Therefore, according to the present invention, a die set holder capable of fixing a plurality of die sets is rotatably provided on a column of a machine tool, and the die set holder is selected while rotating the die set holder to select the required die set. By providing a hydraulically driven machine tool which is fixed on a base and is capable of performing a predetermined machining on a work by operating a hydraulically driven device attached to the frame side with respect to this die set, The purpose is to solve the problems. With this machine tool, a die set holder is rotatably provided on the column, multiple die sets are fixed to this die set holder, and the die set holder can be rotated to easily change the die set according to the processing purpose. At the same time, there is an excellent effect that efficient processing work can be performed at a fixed work place, and the cost of the product can be reduced by providing a cover for the device at one place.

[0005]

To achieve the above object, the present invention has a column having a column between a base and a frame attached to the base, and a die having a plurality of die sets attached around the column. A set holder is rotatably provided on the column, a hydraulic drive device is provided on the frame, and the die set attached to the die set holder is driven by the hydraulic drive device to perform various types of processing on the work. It is a hydraulically driven machine tool, which is a means for solving the problems.

[0006]

With the die set attached to the die set holder 6 rotatably mounted on the column, the die set holder is rotated to move the required die set directly below the hydraulic drive unit. At this time, when the fixing device 9 pivotally attached to the base 1 is erected, the fixing device 9 is fitted into the groove 7 formed at the tip of the die set holder. Thus, the die set is positioned. When the screw 10 of the fixing device 9 is tightened in this state, the die set holder 6 moves downward against the urging force of the spring 8 and contacts the smooth surface 1a of the base 1 to be firmly fixed to the base. It Work W in die set 20
And the hydraulic drive device 5 is driven, the piston 52 descends, the punch 23 of the die set 20 descends, and the workpiece is subjected to predetermined processing. When the processing is completed, the fixing device 9 is released, the die set holder 6 is made free again, and the die set holder 6 is rotated to position the die set 20 used for the next process work directly below the hydraulic drive device 5. And fix it. Then, the same work as described above is repeated to perform the next processing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hydraulically driven machine tool according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the hydraulically operated machine tool according to this embodiment, and FIG. 2 is a plan view of the hydraulically operated machine tool. FIG. 4 is a front view of the hydraulically driven machine tool.

First, the overall schematic structure and operation of the hydraulically driven machine tool according to this embodiment will be described with reference to FIGS. 1 to 4, and then detailed structures of respective parts will be described. In the figure, reference numeral 1 denotes a base, to which a frame 2 bent so that its upper portion is parallel to the base surface is fixed by bolts 2c or the like. A column 3 is arranged between the base 1 and a frame 2 parallel to the base. The column 3 is located approximately at the center of the base, and the lower end of the column 3 is fixed to the base 1 with a screw 3b. It is fixed to the frame 2 by a nut 4. The nut 4 is prevented from being loosened by the loosening prevention screw 4a.

A hydraulic drive device 5 is detachably provided at the tip of the frame 2, and a die set holder 6 having arms 61, 62, 63 capable of fixing the die set 20 is rotated on the column 3. It is provided freely. The die set holder 6 is a spring 8 interposed between the die set holder 6 and the base 1.
By this, a groove 7 is formed at the tip of each arm of the die set holder 6, and the fixing device 9 pivotally attached to the base is raised and inserted into the groove 7. By tightening the screw 10, the die set holder 6 can be firmly fixed in a state of being positioned on the base. In addition, 30 washer and 31 are dust seals.

Die sets 20 for performing different machining can be fixed to the die set holders 6 between adjacent arms by screws, and the die set holders 6 are fixed by a fixing device 9 to the base 1.
When it is not fixed to the column 1, it is slightly floated on the base 1 due to the urging force of the spring 8 and can be easily rotated about the column even when the heavy die set 20 is attached.

In operation, first, when the die set holder 6 is rotated to bring a predetermined die set 20 to the working position, the groove 7 of the die set holder 6 and the fixing device 9 are aligned with each other. Insert the fixing device 9 into the
The die set 20 is positioned and fixed at a predetermined position on the base 1 by tightening. Above the positioned die set, the hydraulic drive device 5 provided at the tip of the frame is opposed. Therefore, when the work is fixed in the die set and the hydraulic drive device 5 is operated in this state, the hydraulic drive device 5 is operated. The piston of the drive unit 5 lowers the punch in the die set, and the predetermined work can be performed on the work in cooperation with the die. At this time, it goes without saying that the column 3 acts to suppress the reaction force between the base 1 and the frame 2.

Next, the fixing device is loosened, the die set holder is rotated again, and the next die set is moved to the working position.
By inserting the fixing device into the groove 7 of the die set holder 6 and tightening the screw, the die set for the next processing is positioned and fixed at a predetermined position on the base 1. Then, the hydraulic drive device is operated again to process the piston, and the work is processed by the newly set die set as described above. In the present invention, as described above, since the die set holder to which the die set is fixed can be freely rotated around the column, the die set suitable for machining the work can be easily replaced and the die set can be held. The die set can be positioned at the same time only by fitting the fixing device into the tip groove of the die set holder. Then, the predetermined machining can be easily performed on the work simply by operating the hydraulic drive device provided so as to face the positioned die set.

Next, the detailed structure of each part will be described. [Base 1] The base has a flat plate shape as shown in FIGS. 1 and 2, a smooth surface 1a for fixing the die set is formed on the upper surface thereof, and the insertion hole 1d for the column 3 is formed in the center thereof. Is provided with a screw portion 1 for fixing the column 3 at one end thereof.
b is formed. Further, a screw hole 1c for fixing the frame 2 is formed at one end of the base 1. As shown in FIGS. 2 and 3, a fixing device 9 that fits in a groove 7 formed at the tip of the die set holder 6 is mounted on both sides of the base 1 so as to be up and down. The fixing device is shown in Figure 3.
When the screw 10 is tightened while the fixing device is fitted in the groove of the die set holder 7 as shown in, the die set holder 6 can move downward against the biasing force of the spring 8. As a result, the die set holder 6 is used as the base 1
It can be firmly fixed on the top. Further, a recess 1f for holding the spring 8 is provided at one end of the mounting hole 1d, and further, at one end of the base, an inclined portion 1 for dropping chips of a workpiece processed by a die set.
e is formed. The fixing device is not limited to the configuration as described above, it may also be utilized in any form including clamp appropriate structure as long as the structure can be positioned fixed to the die set holder in place. Also, the number of fixing devices attached to the base can be appropriately selected according to the size of the machine tool and the like.

[Frame 2] The frame 2 has a screw hole 2d at the lower end thereof so that the frame can be fixed to the base 1 by a screw 2c, and the upper end thereof is bent so as to be substantially parallel to the base. A column insertion hole 2a and a hole 2b in which the hydraulic drive unit 5 can be removably attached are formed in the portion (L-shaped) at a position facing the column 3 mounting hole 1d formed substantially in the center of the base 1. And are formed.

[Column 3] A large diameter portion 3a is provided in the middle of the column 3.
Has a function of holding the die set holder 6 rotatably on the side of the base 1 of the column, and the lower end thereof has a screw 3 that can be screwed into the screw portion 1b of the mounting hole 1d provided on the base 1.
b is provided, and the upper end thereof is the column insertion hole 2 of the frame 2.
A screw 3c is provided at the tip provided so as to project from a, and a nut 4 is screwed onto the screw to attach the frame 2 to the large diameter portion 3 of the column.
It can be fixed by abutting on the end 3e of a. It should be noted that the nut 4 can be fitted with a locking screw 4a by penetrating a slit 4b having a locking function. The method of fixing the column and the base is not limited to the screw, and various fixing means can be adopted.

[Die Set Holder] FIG. 5 is a bottom view of the die set holder, and FIG. 6 is a sectional view of the die set holder. As shown in the drawing, the die set holder 6 is formed with a through hole 6a into which the column 3 is inserted, and arms 61, 62 and 63 are formed at three equally divided positions. A screw hole 6b for attaching the die set 20 is formed in these adjacent arms, and the screw hole 6b is formed.
Can be used to fix the die set 20 between the arms of the die set holder 6 (in FIG. 5, the state where one die set 20 is attached is shown). Further, the die set holder 6 is formed with a large diameter hole 6c for storing a spring. When the die set holder 6 is rotatably attached to the column 3, the spring 8 is accommodated through the recess 1f of the base 1 and the washers 8a and 8b provided in the large diameter hole 6c. When fixed, the die set holder 6 is slightly floating above the base 1. Therefore, in this state, since the die set holder has no frictional resistance with the base, it can easily rotate around the column 3. At this time, the washer 30 is set so that the die set holder 6 does not rise more than necessary.
It is adapted to be engaged with the end portion 3f of the large diameter portion 3a of the column 3 via. Further, the through hole 6a of the die set holder
A bush 6d is inserted in the. A groove 7 is formed at the tip of the arm of the die set holder 6, and the fixing device 9 is fitted into the groove 7 and the screw 10 of the fixing device is tightened to secure the die set holder 6 to the base 1. At the same time, the die set 20 can be automatically positioned by fitting the fixing device into the groove 7.

[Die Set] FIGS. 7 and 8 show a plan view and a side view of a die set for cutting. Other than this, a die set for bending or notching is prepared, but in any case, since it is a well-known configuration, detailed description thereof will be omitted. The die set 20 shown in the figure includes a leg portion 21 for fixing to the die set holder 6, and the leg portion 21 is fixed to the die set holder with a screw or the like to be attached to the die set holder. be able to. A die 22 is fixed to the die set 20, and a punch 23 for cutting the work W in cooperation with the die 22 is attached slidably in the vertical direction. When the punch is lowered by the hydraulic drive device while W is placed, the work W is moved to the die 22 and the punch 23.
Will be cut by. In addition to this, a die set capable of executing various processes by the operation of the hydraulic drive device can be used, and the die set shown in FIGS. 7 and 8 is only one example.

[Hydraulic Drive] FIG. 9 is a sectional view of the hydraulic drive. The hydraulic drive device 5 includes a cylinder 51 and a piston 52, and when hydraulic pressure is supplied into the cylinder through a joint from a pressure source (not shown), the piston 52 descends to operate the die set 20. You can do it. A piston 52 is slidably provided in the cylinder 51, and a stopper 53 that determines a descending amount of the piston is provided below the cylinder 51.
A return spring 54 for returning the piston is arranged between the stopper 53 and the piston 52. A flange 55 is formed at one end of the cylinder, and the hydraulic drive device 5 can be fixed to the frame 2 with a screw 56 by using the flange 55. Reference numeral 57 in the drawing denotes an air hole. Of course, a drive device using compressed air can be used instead of the hydraulic drive device.

After the respective members having the above-mentioned structure are assembled as shown in FIGS. 1 and 9, the following working operations are carried out. That is, first, the washer 3a and the bush 6 are attached to the column 3.
D and the die set holder 6 with the dust seal 31 attached are fitted. Furthermore, the washer 8b, the spring 8,
With the washer 8a fitted, the lower end of the column is screwed and fixed to the insertion hole 1d of the base 1. Next frame 2
The column 3 is fitted into the through hole 2a formed in the above, one end of the frame is fixed to the base 1 with the screw 2c, and the nut 4 is screwed onto the upper end of the column protruding above the frame 2 to form the frame on the column. Fixing 2 completes the assembly of the base, frame and column. This assembled frame 2
The hydraulic drive device 5 is fixed to the tip of the screw with screws 56 and the like, and the die set 20 is fixed to three positions of the die set holder 6 to complete the hydraulic drive machine tool.

The die set holder 6 is rotated to move the required die set directly below the hydraulic drive, and the fixing device 9 pivotally mounted on the base 1 is erected to form a groove 7 formed at the tip of the die set holder. To fit. When the screw 10 of the fixing device 9 is tightened in this state, the die set holder 6
Moves downward against the urging force of the spring 8 and contacts the smooth surface 1a of the base 1, and is firmly fixed to the base.
When the work W is set in the die set 20 and the hydraulic drive device 5 is driven, the piston 52 descends and the punch 23 of the die set 20 descends to perform a predetermined processing on the work. When the processing is completed, the fixing device 9 is released, the die set holder 6 is set to the free state again, and the die set holder 6 is rotated to be used in the next working process.
0 is positioned directly below the hydraulic drive unit 5 and fixed. Then, the same work as described above is repeated to perform the next processing. As described above, according to the present invention, it is possible to easily select the three types of die sets 20 by simply rotating the die set holder, and to perform the processing using them.

In the above embodiment, an example in which the die sets are sequentially rotated and used is shown, but the invention is not limited to this. Although an example in which three die sets are attached has been described, more die sets can be attached as necessary by increasing the number of arms formed in the die set holder. The present invention can be implemented in various other forms without departing from the spirit or the main features. Further, the above-described embodiments are merely examples in all respects, and should not be limitedly interpreted.

[0022]

As described in detail above, according to the present invention,
A die set holder that can fix multiple die sets is rotatably installed on the machine tool column, and while rotating the die set holder, select the required die set and fix it on the base of the machine tool. On the other hand, since the hydraulic drive installed on the frame side can be operated to perform the predetermined processing on the work, the cutting device, the notch device, and the bending device move simultaneously due to the conventional ram operation. Compared to the device, the structure is simple and can be created at low cost, and
Excellent operability. In addition, it has an excellent effect that the die set replacement work can be easily performed every time the contents of the processing work change.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulically driven machine tool as a present embodiment.

FIG. 2 is a plan view of the hydraulically driven machine tool.

FIG. 3 is an operation explanatory view of a fixing device attached to a base.

FIG. 4 is a front view of the hydraulically driven machine tool.

FIG. 5 is a plan view of the die set holder viewed from the bottom side.

FIG. 6 is a partial sectional view of a die set holder.

FIG. 7 is a plan view of a die set.

FIG. 8 is a side view of a die set.

FIG. 9 is a diagram showing a relationship between a hydraulic drive system of a hydraulic drive machine tool and a die set.

[Explanation of symbols]

 1 Base 2 Frame 3 Column 4 Nut 5 Hydraulic Drive Device 51 Cylinder 52 Piston 53 Stopper 54 Return Spring 6 Die Set Holder 6a Column Through Hole 6b Screw Hole 6c Large Diameter Hole 61, 62, 63 Arm 7 Groove 8 Spring 9 Fixing Device 10 Screw 20 Die set 21 Leg 22 Die 23 Punch

Claims (5)

[Claims] 1. A die set holder having a column between a base and a frame provided on the base and having a plurality of die sets attached thereto is rotatably provided, and a hydraulic pressure is provided on the frame. A hydraulically driven machine tool comprising a drive device, which drives the die set attached to the die set holder by the hydraulic drive device to perform various machining on a work. 2. The hydraulically driven machine tool according to claim 1, wherein the die set holder can be positioned and fixed on a base by a fixing device. 3. The hydraulically driven machine tool according to claim 1, wherein the die set holder is held in a state of being levitated from above the base by an urging force of a spring when the die set holder is not fixed. 4. The hydraulically driven machine tool according to claim 1, wherein a plurality of die sets are detachably attached to the die set holder. 5. The hydraulically driven machine tool according to claim 2, wherein the hydraulically driven device provided on the frame is provided at a position corresponding to a die set positioned on a base.