JPH06285552A - Method and device for working press type pipe terminal - Google Patents

Abstract

PURPOSE:To provide the method and the device for working a press type pipe terminal, by which a punch mandrel is moved to the upper part by force of hydraulic pressure, and a formed part can be detached from a die by this punch mandrel. CONSTITUTION:A press slide 1 is attached so as to be freely slidable by a punch cylinder on a guide rail 2 of the press type pipe terminal working device main body. In the press slide, a punch 5 for holding a punch mandrel 4 is attached so as to be freely movable in the vertical direction by a hydraulic cylinder 6. The punch mandrel is constituted of a cross section circular member consisting of a small diameter part 4a and a large diameter part 4b, and the large diameter part has a function for controlling the inside diameter of a pipe P being an object to be worked, at the time of working. After the working, the pipe mandrel is moved backward to a position in which the small diameter part remains in the pipe, and when the punch mandrel is moved to the upper part in such a state, the pipe is detached forcibly from a clamp fixed die by the small diameter part of the punch mandrel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-type terminal processing method suitable for forming a bead or the like on a terminal such as a pipe, and an apparatus therefor.

[0002]

2. Description of the Related Art When a bead, a flange or the like is formed on a terminal such as a pipe, the bead or the like is formed by press working. In this forming method, a clamp fixing die, a clamp die and a punch are used, and a predetermined shape such as a flange bead or a double bead is formed on a pipe in cooperation with the clamp die while hydraulically driving the punch. It is a thing.

[0003]

By the way, in the above-mentioned forming method, since the pipe material is plastically deformed by the hydraulic force to form a bead or the like, after the completion of the forming, a so-called so-called between the pipe and the clamp die. It was difficult to eject the pipe from the clamp die because of galling. In particular, if the operator manually removes the pipe from the mold, it may require considerable force and the work itself may be dangerous. Development was urgent. It was also necessary to promote the automation of pipe discharge in order to improve work efficiency. Therefore, as a result of the earnest development by the present inventor based on the background as described above, the pipe discharge method and the device having a simple structure without the need for a major modification of the conventional device have been successfully developed. It was confirmed that the equipment is extremely effective in automating the pipe forming work. This discharging device uses the punch cored bar that is also used in the conventional device, and moves the punched cored bar up by the force of hydraulic pressure so that the punched cored bar forcibly separates the molded product from the mold. This is a very effective device for automating a series of pipe forming operations.

[0004]

Therefore, the first technical means taken by the present invention to solve the problems is a press-type terminal processing method for forming a bead, a flange or the like on a terminal of a pipe or the like. , Positioning and fixing the pipe with a clamp mold in which a mold of a shape to be processed is formed, and then performing predetermined processing in cooperation with the punch, the punch core metal and the mold on the pipe end, and after finishing the processing, A second technical means is a press-type terminal processing machine for forming a bead, a flange or the like on an end of a pipe or the like, characterized in that the pipe is separated from the clamp die by the punch core metal. The apparatus includes a clamp die in which a die having a shape to be processed is formed, and a punch and a punch core metal that cooperate with the clamp die to process a pipe into a predetermined shape. Inch metal core, is characterized in that it is movable in order to disengage the pipe after the punching completion from the clamping die.

[0005]

The tip of the pipe P as a workpiece is positioned by the stopper, and the pipe P is clamped by the clamp die. With the stopper returned to the retracted position,
The clamped pipe P is flange-formed by a clamp die, a punch, and a punch core metal. That is, the punch core metal moves into the pipe while moving, and the punch moves the movable mold in the clamp mold while pressing the end of the pipe P. With this series of movements, the mold formed in the mold is molded on the pipe P. After processing, the pipe core metal is retracted to the position where the small diameter part of the punch core metal remains in the pipe, the clamp moving die is then moved, and the punch core metal is moved upward in that state, the pipe P becomes the punch core. The small diameter part of the gold forcefully separates it from the clamp fixed mold. In this state, the pipe is removed from the punch core metal by the automatic hand, and the pipe end processing operation by the press type pipe end processing device is completed.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a press type pipe terminal processing apparatus according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory views for explaining the movement of a machine for pipe terminal processing by the apparatus.

In FIG. 1, 1 is a press slide, and this press slide 1 is mounted on a guide rail 2 of the main body of the press type pipe terminal processing device so as to be slidable in the left and right directions in the drawing. The press slide 1 is moved by the hydraulic cylinder 2 on the guide rail 2 based on a predetermined control described later. A punch 5 holding a punch cored bar 4 is attached to the press slide 1 so as to be movable in the vertical direction, and the movement of the punch 5 is performed by a hydraulic cylinder (index) 6 provided in the press slide 1 as described later. It is done under control. As shown in the drawing, the punch core metal 4 held by the punch 5 is composed of a circular member having a circular cross section including a small diameter portion 4a and a large diameter portion 4b. The large diameter portion 4b serves as a workpiece during processing. It has a function of regulating the inner diameter of the pipe P.

The machining main body is provided with a clamp die support base 7, and the clamp die support base 7 is provided with a clamp fixing die 8 and a clamp moving die 9. The clamp moving die 9 can be moved up and down by a hydraulic cylinder 10 based on predetermined control described later. The clamp fixing die 8 and the clamp moving die 9 are respectively provided with springs 8 as shown in FIG.
movable mold 8 urged to the left in the figure by b and 9b
a and 9a are provided, and a mold having a shape to be processed into a pipe is formed on the movable mold side. Further, the clamp die support base 7 is provided with a stopper 11 for positioning a pipe as a workpiece, and the tip of the pipe P is positioned by this stopper 11 prior to processing. The stopper 11 is moved to a positioning position and a retracted position by the hydraulic cylinder 12 based on predetermined control described later.

In the press type pipe end processing device, the pipe positioned by the stopper 11 and then clamped by the clamp dies 8 and 9 is used as shown in FIG.
By moving the press slide 1 as shown in FIG. Next, as shown in FIG. 3, the punch core metal 4 is retracted together with the press slide 1 until the small diameter portion of the punch core metal 4 is left in the pipe, and the clamp moving die is separated from the pipe. By moving the punch core metal 4 upward, the pipe P can be discharged from the clamp die by the small diameter portion of the punch core metal 4.

The pipe end processing and the pipe discharge work after the processing is completed will be described in more detail with reference to FIGS. 4 to 8. In the state shown in FIG. 4, the tip of the pipe P as a workpiece is positioned by the stopper 11 described above, then the pipe P is clamped by both clamp dies 8 and 9, and the stopper returns to the retracted position. Shows the closed state. A gap S into which the pipe P is inserted is formed between the punch 5 and the punch cored bar 4.

A pipe P clamped as shown in FIG.
Next, as shown in FIG. 5, the punch 5 and the punch core metal 4 that move to the right in the figure perform flange or bead molding through the following steps. That is, the punch core metal 4 moves into the pipe while moving to the right in the figure, and the punch 5 presses the pipe P end while moving the movable molds 8a and 9a.
a is moved to the right in the figure against the biasing force of the springs 8b and 9b. With this series of movements, the pipe P is molded into a desired mold by a mold.

After that, as shown in FIG. 6, the punch 5 and the punch cored bar 4 are retracted. At this time, the amount of retreat of the punch core metal 4 is set so that only the large diameter portion 4b comes out of the pipe P and only the small diameter portion 4a remains in the pipe. Next, the clamp moving die is moved as shown in FIG. Thereafter, as shown in FIG. 8, when the punch core metal 4 is moved upward together with the punch 5 in the figure, the pipe P is forcibly released from the clamp fixing die 8 by the small diameter portion 4a of the punch core metal 4. In this state, the pipe P is removed from the punch cored bar 4 by an automatic hand, and the pipe P is carried out of the press type pipe terminal processing apparatus to complete the pipe terminal processing operation. Further, the movable mold in the clamp mold is returned to the initial state by the urging force of the springs 8b and 9b. The automatic hand is appropriately constituted by a robot or the like.

An explanation of the control circuit for executing the above operation is given in FIG.
Will be described with reference to. In the figure, 3 is a hydraulic cylinder for moving the press slide, 6 is a hydraulic cylinder for moving the punch core metal 4 up and down, 10 is a hydraulic cylinder for moving the clamp moving die up and down, and 12 is a stopper for positioning the end of the pipe. Is a hydraulic cylinder, and 25 is a hydraulic pump. The hydraulic pump 25 and each hydraulic cylinder are connected to the solenoid valve 2
1, 22, 23, and 24 are connected as shown in the figure, and the solenoid valves are switched in accordance with the above-mentioned steps by a signal from an electronic control unit (not shown) to operate the piston. There is. Also, the hydraulic cylinder 1
A check valve 26 is provided in the circuit for operating 0, and a pressure reducing valve 27, 28 is provided in the circuit for operating the hydraulic cylinders 12, 6.
Is provided. In the figure, 29 is a pressure gauge and 30 is an accumulator. The hydraulic control circuit of the press type pipe terminal processing device is configured as described above, and the electronic control circuit (not shown) switches the solenoid valve to perform predetermined processing on the pipe terminal.

As described above, the press type pipe terminal processing apparatus according to the present invention uses the clamp fixing mold and the clamp moving mold at the end of the pipe, and the punch 5 is driven hydraulically.
While moving the punch core metal 4, a predetermined molding such as a flange bead or a double bead is performed on the pipe, and then the punch core metal 4 can be used to easily remove the processed pipe from the clamp mold. , Can promote work efficiency and automation.

In the above embodiment, an example of forming a single bead has been described. However, it is natural that the same process can be performed by simply changing the clamp die such as a double bead or a flange bead. Further, the movement of the press slide, punch core metal, and clamp die is not limited to hydraulic control, and various types such as electric type can be used as long as similar movement can be realized. . Furthermore, the present invention can be embodied in various forms without departing from the spirit and main characteristics thereof. Therefore, the above-mentioned embodiment is merely an example and should not be limitedly interpreted. Further, all modifications and changes belonging to the equivalent range of the claims are within the scope of the present invention.

[0016]

As described above in detail, according to the press type pipe terminal processing method and the apparatus therefor according to the present invention, even if so-called galling occurs between the pipe and the die after the completion of pipe forming. Since the pipe can be easily discharged from the mold by hydraulic pressure, the pipe processing work can be made more efficient, and it is extremely effective in promoting automation of pipe discharge. It is possible to obtain excellent effects such as.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a press type pipe terminal processing device according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the press type pipe terminal processing device.

FIG. 3 is an operation explanatory view of the press type pipe terminal processing apparatus.

FIG. 4 is an operation explanatory view of a clamp die, a punch, and a punch core metal at the start of pipe end processing by the press type pipe end processing device.

[Fig. 5] Fig. 5 is an explanatory diagram of the above pipe end processing.

FIG. 6 is an explanatory diagram when the punch core metal is retracted at the time of finishing the pipe end processing in the above.

FIG. 7 is an explanatory diagram when the clamp moving die is retracted at the end of the pipe end processing in the above.

FIG. 8 is an explanatory diagram of a pipe discharge state after finishing the pipe end processing in the above.

FIG. 9 is a control hydraulic circuit diagram of the press type pipe terminal processing apparatus of the present invention.

FIG. 10 is an example of pipe end processing by the press type pipe end processing device of the present invention.

[Explanation of symbols]

 1 Press Slider 2 Guide Rail 3 Hydraulic Cylinder 4 Punch Core Bar 5 Punch 6 Hydraulic Cylinder 7 Clamp Die Support 8 Clamp Fixing Die 9 Clamp Moving Die 10 Hydraulic Cylinder 11 Stopper

Claims (4)

[Claims] 1. In a press type terminal processing method for forming a bead, a flange, etc. on an end of a pipe or the like, the pipe is positioned and fixed by a clamp mold in which a mold of a shape to be processed is formed, and then the same. A press-type pipe terminal processing method, wherein predetermined processing is performed on a pipe end in cooperation with a punch, a punch core metal, and the die, and after the processing is completed, the pipe is detached from the clamp die by the punch core metal. 2. A press-type terminal processing machine for forming a bead, a flange or the like on an end of a pipe or the like, wherein the device is a clamp mold having a mold of a shape to be processed, and the clamp mold. And a punch core metal for working a pipe into a predetermined shape in cooperation with the pipe, and the punch core metal is configured to be movable so as to separate the pipe from the clamp die after the punching is completed. Press-type pipe terminal processing equipment. 3. The punch cored bar is composed of a large diameter part that regulates the inner diameter of the pipe and a small diameter part formed at its tip, and the small diameter part is configured to separate the pipe from the clamp die. The press type pipe terminal processing device according to claim 2. 4. The press type pipe end processing device is configured to automatically discharge the pipe, which is separated from the clamp mold by the punch core metal, to the outside of the machine. The press type pipe terminal processing device described in any one of 3.