JPH01202399A - Method and device for forming pipe terminal using thin clamp - Google Patents

Abstract

PURPOSE:To simply form the compound terminal of a pipe without the need for changing a clamp device by moving a terminal forming die to a working position according to the using order of each forming by a die fitting part. CONSTITUTION:The terminal of a pipe is subjected to drawing by locating the 1st die 2A of a terminal forming die on the same axial line as the pipe and advancing the die 2A. The pipe is then clamped by a main clamp upper die 3A and lower die 3B and one part of the terminal of the formed pipe is clamped by a subclamp upper die 4A and lower die 4B. The 2nd die 2B is located by moving it on the same axial line with the pipe by actuating a die fitting part. Thereafter, the terminal of the pipe is subjected to drawing by advancing the 2nd die 2B. Finally the 1st die 2A is located on the same axial line with the pipe again by moving the die fitting part and the projecting part is completed by executing drawing again thereon by the clamping of the clamp upper die 4A and lower die 4B by advancing the die 2A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pipe end forming method using twin clamps and an apparatus therefor.

(Prior Art) Pipe ends are formed by, for example, drawing processing, expanding processing, etc., but in most cases, these are combined to form pipe ends into appropriate shapes.

Conventionally, in such a case, for example, as shown in FIG.
The pipe P is clamped by 03A, and the first mold 1
Squeeze the end of pipe P by 02A. Next, Figure 3 (B
), in the second processing, the first mold 102A is removed and the second mold 102B is installed in the mold mounting part 101, and the pipe P also matches the shape formed in the first step. The molded portion is clamped by the second clamp device 103B, and the end of the pipe P is expanded and molded by the second mold 102B. Further, as shown in FIG. 3(C), as a third process, the second mold 102B is removed and the third mold 102C is mounted on the mold mounting part 101, and the pipe P is also The molded part is clamped by a third clamp device 103C that matches the shape molded in the first step and the second step, and the pipe P is clamped by the third mold 102C.
The terminal is drawn and formed.

In other words, in the past, the pipe was clamped in a state suitable for each process, and the mold was equipped with a different type of mold each time to perform each process and form the end. .

(Problems to be Solved by the Invention) However, in the conventional process of forming the end of the pipe P in this way, the more complex the combination of drawing and expanding processes, the more difficult it is to form the end of the pipe P. The molding die has to be attached and detached more frequently, and the clamping device needs to be replaced each time to clamp the pipe P, which is very inconvenient as it takes a lot of time to set up the work.

Therefore, in view of the above-mentioned problems, this invention reduces the frequency of attaching and detaching the mold, does not require replacing the clamp device, and allows anyone to easily perform composite end molding of pipes. It was created with this in mind.

(Means for Solving the Problems) This invention is a pipe end forming method in a pipe processing machine, in which a plurality of types of end forming molds are installed in parallel, and the pipe is formed in one direction. The pipe is fixed by a main clamp in the vicinity of the end to be molded, and in the first processing, the first processing mold of the plurality of types of molds is moved by the mold mounting part. The pipe is placed at the processing position and end molding is performed, and from the next processing, the molds for the next processing are placed at the processing position by moving the mold attachment part appropriately, and at that time, the pipe is also In addition to the main clamp, a sub-clamp is used for the next processing to perform twin clamping and end forming, making it possible to use multiple types of end forming molds in parallel as a pipe end forming device. A main clamp device that clamps the vicinity of the end of the pipe to be molded, and a sub-clamp device that clamps the molded part appropriately from the next processing after the end is formed by clamping with the main clamp device. The mold mounting part is formed to move and arrange the terminal molding molds to the processing positions in accordance with the order of use for each molding process, and these are all held and formed within the rigid frame. Furthermore, the above-mentioned problems are solved by holding and forming the mold mounting section, main clamp device, and sub-clamp device all within the rigid frame.

(Function) In the pipe end forming method and apparatus using twin clamps according to the present invention, a plurality of types of end forming molds are mounted in parallel on the mold mounting part, while the pipe to be formed is The main clamp device clamps and fixes the vicinity of the terminal.

First, in the first processing, the first processing mold of the plurality of types of molds is placed at the processing position by the mold mounting part to perform terminal molding, and from the next processing, The molds for the next processing are placed at the respective processing positions by moving the mold mounting parts appropriately, and at that time, the pipe is also clamped by the main clamping device, and also by a sub-clamping device for the next processing. Terminal molding is performed by clamping.

Moreover, the mold mounting section, the main clamp device, and the sub-clamp device are all held and formed within a rigid frame, making them a unit with excellent strength.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is a mold mounting section provided in the pipe processing machine M, and this mold mounting section 1 is equipped with a plurality of types of terminal forming molds, for example, two first molds and a drawing tool. The mold,
Expansion molds are installed in parallel in the vertical direction as the second mold 2B.

On the other hand, the pipe P is formed to be clamped by a main clamp device consisting of a main clamp upper mold 3A and a main clamp lower mold 3B, and is also formed by a sub-clamp upper mold 4A and a sub-clamp lower mold 4B. It is also configured to be clamped by a sub-clamp device.

First, the pipe P to be molded is clamped and fixed near the end to be molded by the main clamp upper mold 3A and the main clamp lower mold 3B. Therefore, as shown in FIG. 1(A), the first mold 2A of the end molding molds is positioned on the same axis as the pipe P, and the first mold 2A is moved forward to form the end of the pipe P. is drawn. At that time, the sub-clamp upper mold 4A and the sub-clamp lower mold 4
Clamping with B is not performed.

Next, as shown in FIG. 1(B), in addition to clamping the pipe P with the main clamp upper mold 3A and the main clamp lower mold 3B, the end of the pipe P formed by the first drawing process A part of the main clamp upper mold 3A and the main clamp lower mold 3B are actually clamped by the sub-clamp upper mold 4A and the sub-clamp lower mold 4B. Then, the mold mounting part 1 is operated appropriately to make the pipe P.
The second mold 2B is moved and positioned on the same axis as the second mold 2B.

Thereafter, the end of the pipe P is drawn by moving the second mold 2B forward.

Finally, while the pipe P remains sub-clamped by the sub-clamp upper mold 4A and the sub-clamp lower mold 4B, the mold mounting part 1 is moved appropriately to position the first mold 2A again on the same axis as the pipe P. let Then, the first mold 2A is moved forward and the protruding portion is drawn again by the clamping by the sub-clamp upper mold 4A and the sub-clamp lower mold 4B, thereby completing the process. In other words, in addition to main clamping by the main clamp upper mold 3A and main clamp lower mold 3B, the pipe P is clamped in a twin manner by sub-clamping by the sub-clamp upper mold 4A and sub-clamp lower mold 4B. Molding is carried out, and the terminal molding mold is used to appropriately move the first mold 2A and the second mold 2B using the mold mounting part 1 and place them at the processing position, thereby performing composite terminal molding of an appropriate shape. It is something to do.

The apparatus for molding in this manner has a structure as shown in FIG.

That is, the apparatus in the illustrated example shows a pipe end forming machine as a pipe processing machine M, and is mounted within a predetermined frame 80 as a rigid crushing body.

The main clamp upper die 3A and the main clamp lower die 3B are detachably attached to the upper clamp holder 20A and the lower clamp holder 20B, respectively, by a clamp chuck 30 consisting of a T groove and a T-shaped head. mated and installed.

Moreover, this clamp chuck 30 is configured to clamp or release by retracting operation by a cylinder 40 using hydraulic or pneumatic pressure, and the main clamp upper die 3A is attached to the upper die clamp holder 2OA, and the lower die clamp holder 20B is attached to the clamp chuck 30. Attach the main clamp lower mold 3B respectively.

At this time, in the illustrated example, the cylinder 40 itself is installed inside the upper mold clamp holder 2OA and the lower mold clamp holder 20B. By doing so, the mounting space for the cylinder 40 can be saved and the cylinder 40 can be made compact. In addition to this, the cylinder 40 is held by an upper mold clamp holder 2OA.
It is also possible to provide it outside the lower mold clamp holder 20B (not shown).

A vice cylinder 50 is mounted on the upper part of the frame 80.
is installed. Then, a predetermined pipe P is crimped and fixed by this pipe cylinder 50 and clamped.

On the other hand, a sub-clamp upper mold 4A and a sub-clamp lower mold 4B are arranged adjacent to the sides of the main clamp upper mold 3A and the main clamp lower mold 3B, and these sub-clamp upper molds 4
A and the sub-clamp lower mold 4B are formed so as to clamp the end portion of the pipe P by cylinders 55 provided at the upper and lower parts of the frame 80.

Further, the main clamp upper mold 3A is disposed within the frame 80.
In addition to the main clamp lower mold 3B, the sub-clamp upper mold 4A, the sub-clamp lower mold 4B, etc., a mold mounting part 1 is arranged on the side of the sub-clamp upper mold 4A and the sub-clamp lower mold 4B.

This mold mounting part 1 is formed so as to be moved in the direction of the sub-clamp upper mold 4A and the sub-clamp lower mold 4B by a punch cylinder 70 mounted on a frame 80, and a first mold as an end molding mold. 2A and a second mold 2B are attached, and the first mold 2A and the second mold 2B are formed so as to be movable in the vertical direction by a position changing cylinder 75.

At this time, the frame 80 is formed by combining an upper plate 81, a lower plate 82, a right side plate 83, and a left side plate 84 into a box shape (see FIG. 3). By doing so, the structure of the frame 80 is strengthened, and in particular, even if a high thrust force is applied to the frame 80 by the punch cylinder 70, even slight deformation of the frame 80 can be prevented, and extremely high-precision processing becomes possible.

Furthermore, as pipe processing machines other than this, use is planned for pipe processing machines that use the clamp mold 10, such as a pipe chamfering machine and a pipe cutting machine (not shown).

It goes without saying that the present invention is not limited to the embodiments described above.

(Effects of the Invention) In the present invention configured as described above, in the pipe end forming method in the pipe processing machine M, a plurality of types of end forming molds are installed in parallel, and on the other hand, the pipe P to be formed is
The vicinity of the terminal to be molded is fixed with a main clamp, and in the first processing, the first processing mold of the plurality of types of molds is moved to the processing position by the mold mounting part 1. For the next processing, the molds for the next processing are placed at respective processing positions by appropriately moving the mold mounting part 1, and at that time, the pipe P is also In addition to the main clamp mentioned above, additional sub-clamps are used for the next processing, and by clamping into twins and performing terminal forming,
Conventionally, when molding the end of a pipe P with a composite shape, the mold had to be replaced after each processing step, and the clamping device had to be replaced accordingly. The end of the pipe P can be freely shaped without the need for replacement.

These moldings can be easily performed by anyone by setting the positions of each mold appropriately in advance, and since the above-mentioned replacement is not required, the molding time can be shortened. It is something that can be achieved.

In addition, in the apparatus, in the pipe end forming apparatus, a mold mounting part 1 for mounting multiple types of end forming molds in parallel, a main clamp device for clamping the vicinity of the end of the pipe P to be formed, and a main The mold mounting part 1 consists of a sub-clamp device that clamps the molded part appropriately from the next processing after the end is formed by a clamp using a clamp device.
Since the end forming mold is arranged to be moved to the processing position according to the order of use for each forming process, the pipe end forming method can be performed reliably and the structure is very simple. It can be provided at low cost.

Moreover, since the mold mounting part 1, main clamp device, and sub-clamp device are all held and formed within a rigid frame, they can be installed as a unit on a pipe processing machine M, etc., and high thrust can be applied to the rigid frame. This prevents even the slightest deformation even when the material is applied, and enables extremely high-precision machining.

As described above, according to the present invention, the frequency of attaching and detaching the mold is reduced, and there is no need to replace the clamp device, so that anyone can easily and quickly form the composite end of a pipe. This provides excellent effects such as significant cost reduction.

[Brief Description of the Drawings] Figures 1 and 2 show an embodiment of the present invention.
FIG. 1 is a process diagram, FIG. 2 is a front view of a pipe end forming apparatus, and FIG. 3 is a process diagram showing a conventional pipe end forming process. M... Pipe processing machine, P... Pipe, 1... Mold mounting part, 2A... First mold, 2B... Second mold, 3
A: Main clamp upper mold, 3B: Main clamp lower mold, 4A: Sub clamp upper mold, 4B: Sub clamp lower mold, 2OA: Upper clamp holder, 20B: Lower Mold clamp holder, 30... Clamp chuck, 40... Cylinder, 5
0... Vise cylinder, 55... Cylinder, 70.
... Punch cylinder, 75 ... Position change cylinder, 8
0...Frame, 81...Upper plate, 82...Lower plate,
83...Right side plate, 84...Left side plate, 90...Operation lever. 101... Mold mounting part, 102A... First mold, 1
02B...Second mold, 102C...Third mold, 10
3A...first clamp device, 103B...second clamp device, 103C...second clamp device. Patent applicant Limited company
Date Book Figure 1 (B) 1 2B A 4A 3A 4A 3A 1st 2B (( / A 4A 3A Figure 3 (C) Mouth C 03C

Claims (1)

[Claims] 1. In a pipe end forming method in a pipe processing machine, a plurality of types of end forming molds are installed in parallel, and on the other hand,
The pipe to be formed is fixed by a main clamp near the end to be formed, and in the first processing,
The first processing mold of the plurality of types of molds is placed at the processing position by the mold mounting section to perform terminal molding, and from the next processing, the mold for the next processing is placed at the processing position by the mold mounting section. are arranged at the processing positions by appropriately moving the pipes, and at that time, in addition to the main clamp, the pipe is further sub-clamped for the next processing, so that it is clamped into twin clamps to form the end. A pipe end forming method using twin clamps. 2. In a pipe end forming device, there is a mold mounting section that mounts multiple types of end forming molds in parallel, a main clamp device that clamps the vicinity of the pipe end to be formed, and a pipe end forming device that clamps the end of the pipe to be formed after the end is formed. , and a sub-clamp device that appropriately clamps this molded part from the next processing, and the mold mounting part is formed to move and arrange the terminal molding die to the processing position according to the order of use for each molding process. A pipe end forming device that uses a distinctive twin clamp. 3. The pipe end forming apparatus using twin clamps according to claim 2, wherein the mold mounting section, the main clamp device, and the sub-clamp device are all held and formed within a rigid frame.