JP2017109269A - Pipe processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe processing device which can cut a processed side end part of a pipe at a predetermined position after carrying out forming by one device.SOLUTION: A pipe processing device includes a first mold 2 having first molding surfaces 11b, 16b for processing a pipe, a second mold 3 having a second molding surface 3a for processing the pipe, a first core metal 4 which is movable in an axis center X-X direction with respect to the first mold 2, and a second core metal 5 which is movable in the axis center X-X direction and in a direction orthogonal to the axis. The second mold 3 can move in the direction orthogonal to the axis center X-X. After the pipe is arranged in a predetermined position in the first mold 2, the first core metal 4 is inserted in the pipe and the pipe is molded, and then the first mold 2 and the first core metal 4, and the second mold 3 and the second core metal 5 are relatively moved in the direction orthogonal to the axis center X-X of the first core metal 4, and an end part of the pipe is cut.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pipe processing apparatus.

  Conventionally, when the end of a metal pipe is formed into a deformed cross section using a punch and a die, the end of the processed side of the pipe is inclined due to the elongation of the pipe material and the frictional resistance with the mold. May occur.

  For this reason, it is necessary to cut and remove the processing-side end portion after forming to form the end portion of the pipe in a desired shape.

  As described above, after forming, a metal saw or a pipe cutting device as disclosed in Patent Document 1 can be used as a device for cutting the processed side end of the pipe.

Japanese Patent No. 3361315

  However, since the cutting device is different from a device that performs forming on a pipe, it is necessary to transport the pipe to the cutting device after forming with the forming device. The attachment position of the pipe may vary, and the accuracy of the cutting shape may be deteriorated.

  Therefore, an object of the present invention is to propose a pipe machining apparatus that solves the above problems.

In order to solve the above-described problems, the present invention provides a first mold having a first molding surface for processing and molding a pipe, and a second mold having a second molding surface for processing and molding the pipe. And a core that can be inserted into at least the first mold,
The core metal is movable in the axial direction of the core metal with respect to the first mold, and the axial direction of the first metal core and the axis perpendicular to the first metal mold. A second mandrel movable in the direction of
The second mold can move in a direction perpendicular to the axis of the first core;
After molding the pipe in a predetermined position in the first mold, after molding at least a part of the pipe by inserting the first core bar into the pipe located in the first mold,
The first mold and the first metal core, and the second mold and the second metal core are relatively moved in a direction orthogonal to the axis of the first metal core to cut the end of the pipe. It is characterized by doing.

  Moreover, after the said 2nd metal core moves, you may provide the return means which moves a 2nd metal core so that the axial core of the said 2nd metal core may correspond with the axial core of the said 1st metal core.

  In the pipe processing apparatus of the present invention, the first core bar is inserted into the pipe located in the first mold, and after forming at least a part of the pipe, the first mold and the first core bar, The end of the pipe can be cut by moving the two molds and the second core bar in a direction perpendicular to the axis of the first core bar, so the cutting position relative to the molded part is stable. In addition, the accuracy of the cutting shape can be improved.

The longitudinal cross-sectional view of the pipe processing apparatus which concerns on Example 1 of this invention. The longitudinal cross-sectional view of the state which mounted the pipe in the fixed metal mold | die from the state of FIG. The longitudinal cross-sectional view of the state which lowered | hung the movable metal mold | die from the state of FIG. The longitudinal cross-sectional view of the state which lowered | hung the 2nd metal mold | die from the state of FIG. The longitudinal cross-sectional view of the state which moved the 1st metal core and the 2nd metal core from the state of FIG. The longitudinal cross-sectional view of the state which lowered | hung the 2nd metal mold | die and the 2nd metal core from the state of FIG. The longitudinal cross-sectional view of the state which raised the 2nd metal mold | die from the state of FIG. The longitudinal cross-sectional view of the state which raised the 2nd metal core from the state of FIG. The longitudinal cross-sectional view of the state which made the 1st metal core and the 2nd metal core retreat from the state of FIG. The longitudinal cross-sectional view of the state which raised the movable metal mold | die from the state of FIG. The longitudinal cross-sectional view of the pipe processing apparatus which concerns on Example 2 of this invention.

  A mode for carrying out the present invention will be described based on an embodiment shown in the drawings.

[Example 1]
A pipe machining apparatus according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the pipe processing apparatus 1 includes a first metal mold 2, a second metal mold 3, a core metal 6 including a first metal core 4 and a second metal core 5.

  As shown in FIG. 1, the first mold 2 is composed of a fixed mold 11 erected on a fixed first base 9 and a second base 12 fixed above the first base 9. A movable mold 16 is provided below the first moving means 15 made of a cylinder and is movable in a direction perpendicular to the axis XX of the first core 4 (vertical direction in this embodiment). Have

  As shown in FIGS. 1 and 2, the holding die 11 is formed on the upper surface of the fixed mold 11 in a shape corresponding to the lower half circumferential surface of the pipe 10 as a workpiece, and holds the lower half outer circumferential surface of the pipe 10. And the 1st shaping | molding surface 11b for processing and forming the pipe 10 is provided in the 1st metal core 4 side from this holding | maintenance part 11a. The inner surface shape of the first molding surface 11b is formed in a shape corresponding to the outer shape of the lower half of the pipe 10 after forming, and in this embodiment, the inner surface shape is larger than the inner diameter of the holding portion 11a. Yes.

  As shown in FIGS. 1 and 3, the lower surface of the movable mold 16 is formed in a shape corresponding to the upper half peripheral surface of the pipe 10 that is a workpiece, and holds the upper half outer peripheral surface of the pipe 10. And the 1st shaping | molding surface 16b for processing and shaping the pipe 10 is provided in the 1st metal core 4 side from this holding | maintenance part 16a. The inner surface shape of the first molding surface 16b is a shape corresponding to the outer half shape of the upper half of the pipe 10 after forming. In the present embodiment, the inner surface shape is larger than the inner diameter of the holding portion 11a. Yes.

  As shown in FIG. 1, the second mold 3 is provided close to the first core 4 side of the movable mold 16, and the second moving means made of a cylinder is provided below the second base 12. The first cored bar 4 is provided so as to be movable in a direction orthogonal to the axis XX of the first cored bar 4. The second mold 3 has a second molding surface 3 a that is formed in a shape corresponding to the outer peripheral shape of the upper half of the pipe 10 after forming, and for processing and molding the pipe 10. In the present embodiment, the inner diameter of the second molding surface 3a is formed to be the same as the inner diameter of the first molding surface 16b on the first core metal 4 side end.

  The first cored bar 4 has a processed portion 4a formed in an outer peripheral surface shape corresponding to the inner peripheral surface shape of the pipe 10 after forming. In this embodiment, the processing portion 4 a is set to have a diameter larger than the inner diameter of the pipe 10 that is a workpiece, and the first metal mold 2, the second metal mold 3, the first metal core 4, and the second metal core 5 are used for forming. A diameter expansion process (expansion forming) is performed by molding.

  The first metal core 4 is fixed by a bolt 21 to a shaft member 20a fixed to the moving base 20 that can move in the axial direction (XX direction) by third moving means (not shown). The first metal core 4 can move relative to the first metal mold 2 in the axial direction (XX direction).

  The second metal core 5 is provided between the first metal core 4 and the moving base 20, and a hollow portion 5 a having both ends opened is formed inside the second metal core 5. A shaft member 20a fixed to the moving base 20 is inserted into the hollow portion 5a, and the second mold 3 side (upper side) in a direction orthogonal to the axis XX on the inner peripheral surface of the hollow portion 5a is inserted. ) And the outer peripheral surface of the shaft member 20a, a gap is formed so as to have a gap of a predetermined distance L1 in the moving direction of the second mold 3, that is, in the direction orthogonal to the axis XX. Yes. Thereby, the 2nd metal core 5 can move to the moving direction of the 2nd metal mold | die 3. FIG.

  Further, the second cored bar 5 is moved until its axis is located on the same line as the axis X-X direction of the first cored bar 4, that is, returned to the position at the time of starting machining. Returning means 23 comprising a cylinder is provided. The return means 23 can lower the second core metal 5 in synchronization with the second mold 3 when the second mold 3 is lowered toward the first base 9 by the second moving means 18. It is like that.

  As described above, the second metal core 5 has the axial direction (XX direction) of the first metal core 4 and the moving direction (first direction) of the second metal mold 3 with respect to the first metal mold 2. It can move relatively in the direction perpendicular to the axis of the core 4.

  Further, at least a part of the second cored bar 5, in this embodiment, the tip part is formed with a processed part 5 b formed in a shape corresponding to the inner peripheral surface circumferential shape after the forming of the pipe 10. .

  Next, the processing method of the pipe 10 using the said pipe processing apparatus 1 is demonstrated.

  First, as shown in FIG. 1, the movable mold 16 is raised to the second base 12 side by the first moving means 15, and the fixed mold 11 and the movable mold 16 are separated from each other by a predetermined distance. Further, as shown in FIG. 1, the second moving means 18 raises the second mold 3 to the second base 12 side (upward in FIG. 1) and separates it from the fixed mold 11 by a predetermined distance. . Further, the moving base 20 and the first core metal 4 and the second core metal 5 are retracted to a position separated from the first mold 2 by the third moving means (not shown), and the machining shown in FIG. 1 is started. State.

  Next, as shown in FIG. 2, the pipe 10 which is a workpiece is placed at a predetermined position of the fixed mold 11, and the pipe 10 is fitted on the holding portion 11 a, and on the processing side of the pipe 10. An end on the side of a certain first metal core 4 is projected from an end of the fixed mold 11.

  Next, as shown in FIG. 3, the movable mold 16 is lowered to the first base 9 side by the first moving means 15, and the pipe 10 is held by the holding portion 11 a of the fixed mold 11 and the movable mold 16. It is sandwiched and held by the portion 16a. A protruding portion 10 a of the pipe 10 protrudes from the processing side of the first mold 2.

  Next, as shown in FIG. 4, the second moving means 18 lowers the second mold 3 toward the first base 9, and the axis of the second molding surface 3 a of the second mold 3 is movable. The axis of the first molding surface 16b of the mold 16 is made the same.

  Next, as shown in FIG. 5, the moving base 20 and the first core metal 4 and the second core metal 5 are moved integrally in the direction of the first mold 2 by the third moving means, and the pipe 10 The first metal core 4 and the second metal core 5 are press-fitted into At this time, press-fitting is performed until the second metal core 5 is not positioned in the first metal mold 2 and only the first metal core 4 is positioned.

  The first molding surface 11 b of the fixed mold 11, the first molding surface 16 b of the movable mold 16, the second molding surface 3 a of the second mold 3, the processed portion 4 a of the first core metal 4, and the second core metal 5. By the processed portion 5b, the end portion of the pipe 10 is subjected to diameter expansion processing (expanded diameter forming), and the expanded diameter portion 24 is formed.

  Next, as shown in FIG. 6, the second mold 3 is moved by the second moving means 18 in the direction perpendicular to the axis XX of the first core 4, in this embodiment, on the first base 9 side. The lower diameter portion 24 of the pipe 10 and the second cored bar 5 are synchronously lowered by this lowering force, and the end portion 24 on the diameter-expanded side of the pipe is fixed to the fixed mold 11. A part of the enlarged diameter portion 24 of the pipe 10 is cut (sheared) by the respective edges (blades) of the movable mold 16, the second mold 3, the first core metal 4, and the second core metal 5. ) To form the scrap 25 and the formed pipe 26.

  Next, as shown in FIG. 7, the second moving means 18 raises the second mold 3 toward the second base 12 and separates the second mold 3 and the pipe scrap 25.

  Next, as shown in FIG. 8, the return core 23 moves the second core bar 5 until the axis is located on the same line as the axis X-X of the first core 4, that is, processing. Return to the starting position.

  Next, as shown in FIG. 9, the moving base 20 and the first core metal 4 and the second core metal 5 are integrally moved backward in the direction away from the first mold 2 by the third moving means. At this time, the scrap 25 is also separated from the forming pipe 26 together with the second cored bar 5 and then removed.

  Next, as shown in FIG. 10, the movable mold 16 is raised to the second base 12 side by the first moving means 15, the pipe 10 and the movable mold 16 are separated, and the processed pipe 23 is taken out. A molded pipe 26 that is an intermediate product or product is obtained.

  As described above, since the pipe processing apparatus 1 of the present application can perform the diameter expansion processing and the cutting of the end portion on the diameter expansion processing side with one apparatus, It is not necessary to convey the cut shape, and the cutting can be performed at a predetermined position, and the accuracy of the cut shape can be improved.

  In addition, there is no need to transport the pipe whose diameter has been increased, and the manufacturing cost can be reduced because it can be carried out with one apparatus.

  Further, the return means 23 moves the second core bar 5 until the axis core thereof is the same as the axis core XX of the first core bar 4, that is, returns the second core bar 5 to the position at the start of processing. By doing in this way, the position of the 2nd metal core 5 with respect to the axis of the 1st metal core 4 can be made constant at the time of diameter expansion processing, and the accuracy of diameter expansion processing and cutting processing is improved. Can do.

  In the above embodiment, the second mold 3 and the second core metal 5 are connected to the axis XX of the first core metal 4 in a state where the first mold 2 and the first core metal 4 are fixed. The first mold 2 and the first core metal are moved in a direction orthogonal to each other, and a part of the enlarged diameter portion 24 of the pipe 10 is cut, but the second mold 3 and the second core metal 5 are fixed. 4 may be moved in a direction perpendicular to the axis XX of the first cored bar 4 to cut a part of the enlarged diameter portion 24 of the pipe 10. That is, in the present invention, the first mold 2 and the first core metal 4, the second mold 3 and the second core metal 5 are relative to each other in the direction orthogonal to the axis XX of the first core metal 4. And a part of the enlarged diameter portion 24 of the pipe 10 is cut.

  Further, the return means 23 is constituted by a member having a restoring force such as a spring, and the second core 3 is lowered against the restoring force of the return means 23, and the second core is lowered by the descending force. When the metal 5 is lowered and the second mold 3 is raised by the second moving means 18, the restoring force of the return means 23 returns the second core metal 5 to the position at the start of processing. You may do it.

[Example 2]
In the first embodiment, the second mold 3 is constituted only by a movable mold having the second molding surface 3a. However, as shown in FIG. 11, the second mold 32 is formed by the first mold of the first embodiment. The upper movable mold 33 similar to the two molds 3 and the lower movable mold 34 may be used.

  The lower movable mold 34 has a second molding surface 34 a for processing and molding the pipe 10. The second molding surface 34a is formed in a shape corresponding to the outer peripheral shape of the lower half of the pipe 10 after forming, and in this embodiment, the second molding surface 34a is formed larger in diameter than the inner diameter of the holding portion 11a.

  Further, the lower movable mold 34 can move in a direction orthogonal to the axis XX of the first core metal 4, and the lower movable mold 34 is fixed to the axis of the second molding surface 34a. A second force having a restoring force such as a spring for returning the lower movable mold 34 until the axis of the first molding surface 11b of the mold 11 is on the same line, that is, to the position at the start of processing. A return means 36 is provided.

  By lowering the upper movable mold 33 against the restoring force of the second return means 36, the lower movable mold 34 is lowered in synchronization with the upper movable mold 33 by the lowering force. A part of the expanded diameter portion 24 of the pipe is cut by the second mold 33 or the like to form the scrap 25 and the formed pipe 26.

  Further, when the second core 5 is moved upward by the return means 23, the lower movable die 34 is returned to the position at the start of machining by the restoring force of the second return means 36.

  The second return means 36 may be constituted by a cylinder or the like, and the lower movable die 34 may be positively moved.

  Since other structures are the same as those of the first embodiment, description thereof is omitted.

  Also in the second embodiment, the same effects as in the first embodiment are obtained.

  Further, by using the second mold 32 including the upper movable mold 33 and the lower movable mold 34, the accuracy of the diameter expansion process and the cutting process can be further improved.

[Other Examples]
In the first and second embodiments, the first mold 2 is composed of the two molds of the fixed mold 11 and the movable mold 16, but these are integrally formed to form a first mold composed of one mold. Then, the pipe 10 may be inserted into the first mold that is fixed on the first base 9 and made of this one mold.

  The pipe 10 is not limited to a cylinder having a perfect cross section, and a pipe having any other cross sectional shape can be used. Further, the cross-sectional shape of the pipe 10 after forming is not limited to the diameter expansion of the first embodiment, and can be set to any shape such as a reduced diameter, an irregular shape, a square shape, a sector shape, or the like.

DESCRIPTION OF SYMBOLS 1 Pipe processing apparatus 2 1st metal mold | die 3a, 34a 2nd molding surface 3,32 2nd metal mold | die 4 1st metal core 5 2nd metal core 6 Core metal 10 Pipe 11b, 16b 1st molding surface 23 Return means

Claims (2)

A first mold having a first molding surface for processing and molding a pipe; a second mold having a second molding surface for processing and molding the pipe; and a core which can be inserted into at least the first mold. With gold,
The core metal is movable in the axial direction of the core metal with respect to the first mold, and the axial direction of the first metal core and the axis perpendicular to the first metal mold. A second mandrel movable in the direction of
The second mold can move in a direction perpendicular to the axis of the first core;
After molding the pipe in a predetermined position in the first mold, after molding at least a part of the pipe by inserting the first core bar into the pipe located in the first mold,
The first mold and the first metal core, and the second mold and the second metal core are relatively moved in a direction orthogonal to the axis of the first metal core to cut the end of the pipe. A pipe processing apparatus characterized by:   A return means is provided for moving the second metal core so that the shaft core of the second metal core coincides with the axis of the first metal core after the second metal core moves. The pipe processing apparatus according to claim 1.

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