JP2001246524A - Working method of tubular body and working device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems that percent defective is high in quality problems such as decentering of an extended pipe part of a tubular body and a cutting part, biased thickness, crushing, dispersion of dimensions, etc., since pipe extension work and cutting work are separately carried out and that cost is high as they are worked by different machines. SOLUTION: An extended pipe part is cut and worked by moving a tubular body to a cutting work region while holding it by a holding means after extending and working an end part of the tubular body by holding an outer periphery of the tubular body by the holding means so as to carry out extension and cutting work of the tubular body continuously by using the same machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for processing a pipe body, in which the end face of the pipe body is expanded using the same machine, and then the expanded portion is continuously cut. is there.

[0002]

2. Description of the Related Art Conventionally, when processing such as cutting the inner surface of an expanded portion after expanding an end surface of a tube body, first expand the end portion of the tube with a tube expander, The pipe was removed from the tube expander and mounted on a boring machine for cutting.

[0003]

However, the above-described processing method is subject to various restrictions,
Since the pipe expanding process and the cutting process are performed separately, quality problems such as eccentricity, uneven wall thickness, crushing, and dimensional variation between the expanded portion and the cut portion of the pipe body have occurred, and the defect rate has been high. In addition, the cost is high due to processing by separate machines.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to continuously perform pipe expansion and cutting using the same machine. That is, in claim 1, after the pipe as the workpiece is gripped by the gripping means, the pipe is plastically processed, and then the pipe is moved while being gripped by the gripping means to perform cutting. This is the method of processing the characteristic pipe.

According to a second aspect of the present invention, the outer periphery of a pipe as a workpiece is gripped by gripping means, the end of the pipe is expanded, and then the pipe is moved while being gripped by the gripping means. In addition, there is provided a method of processing a pipe body, which is characterized by cutting the expanded portion.

[0006] The construction of the tube processing apparatus is described in claim 3.
In the machine body, a gripping mechanism having a vertically movable means for vertically moving the clamp portion together with a clamp portion for detachably holding the workpiece, a moving mechanism for horizontally moving the gripping mechanism, A plastic working mechanism having a punch portion for plastically processing the end face of the workpiece and having a vertical moving means and a horizontal moving means for vertically moving and horizontally moving the punch, and a cutting mechanism for cutting the workpiece. It is a configured tube processing device.

According to a fourth aspect of the present invention, the structure of the punch portion for plastically processing the end surface of the workpiece is formed by forming the tip portion of the shaft into a column and gradually increasing the diameter from the base end to the rear end of the column. And a large-diameter cylindrical portion connected to the end of the large-diameter portion.

According to a fifth aspect of the present invention, there is provided an apparatus for processing a tubular body, characterized in that punch bars are provided in two upper and lower stages.

According to a sixth aspect of the present invention, there is provided an apparatus for processing a pipe, wherein a fluid pressure cylinder is used as a vertical moving means or a horizontal moving means.

According to a seventh aspect of the present invention, there is provided a gripping mechanism having a clamp portion for detachably holding a workpiece and an up-down moving means for vertically moving the clamp portion, wherein a gripping mechanism provided on an upper portion of a machine main body is provided in a horizontal direction. The pipe processing apparatus is characterized in that it has a moving mechanism for sliding the pipe.

[0011] Regarding the control of the processing apparatus, in claim 8,
A gripping mechanism having a clamp portion for detachably holding the workpiece and having up-and-down moving means for vertically moving the clamp portion, a moving mechanism for horizontally moving the gripping mechanism, and an end face of the workpiece. A plastic working mechanism having a punch portion for performing plastic working and having a vertical moving means and a horizontal moving means for vertically moving and horizontally moving the punch, and a control mechanism for controlling a cutting mechanism for cutting a workpiece. A pipe processing apparatus characterized by being provided.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a pipe processing apparatus according to the present invention, FIG. 2 is a plan view of the processing apparatus, FIG. 3 shows a pipe as a workpiece, and (a) is a front view of the pipe before processing. Sectional view,
(B) is a front sectional view of the tube after processing. In the drawing, reference numeral 1 denotes a machine main body, which has a clamp portion on the machine main body 1 for detachably holding a tube as a workpiece and a vertical holding means for vertically moving the clamp portion. A mechanism 2, a moving mechanism 3 for moving the gripping mechanism 2 in a horizontal direction, and a vertical moving means and a horizontal moving means having a punch portion for plastically processing an end face of a workpiece, and for vertically moving and horizontally moving the punch bar. And a cutting mechanism 5 for cutting a workpiece, and a control mechanism 6 for controlling each of the mechanisms.

FIG. 4 is a front view showing a cross section of a part of the gripping mechanism 2 and the plastic working mechanism 4. The gripping mechanism 2 includes a lower clamp die 21, an upper clamp die 22, and a clamp jig holding cylinder 23. Clamp lower mold 2
Reference numeral 1 denotes a recess formed on the upper surface for mounting a tube as a workpiece. This concave portion is formed in an outer diameter shape after the pipe is expanded. The tip of the gripping mechanism moving cylinder 31 is fixed to the side surface of the lower clamp die 21 to move the gripping mechanism 2 to the cutting region. A concave portion for pressing the tube is formed on the lower surface of the upper clamp die 22. This concave portion is also formed in accordance with the outer diameter shape of the tubular body after expansion. Further, a cylinder 23 for holding a clamp jig for moving the upper clamp die 22 up and down is connected to the upper clamp die 22.

The lower surface of the lower clamp die 21 is provided with a groove which fits on a rail of a bed provided on the upper part of the machine body 1 and is mounted on the rail, and the moving mechanism 3 is moved by a gripping mechanism moving cylinder 31 on the rail. Move back and forth.

The plastic working mechanism 4 for expanding the end face of the pipe body includes:
It comprises a first punch rod 41, a second punch rod 42, a punch rod moving cylinder 43, and a plastic working cylinder 44. The first punch rod 41 has a cylindrical portion at the distal end of the shaft, and a large diameter portion that gradually increases in diameter from the base end to the rear end of the cylinder is formed. It is formed of a large diameter cylindrical portion that is connected. The second punch rod 42 has the same shape as the first punch rod 41, but the first punch rod 41 has the same shape.
It is formed with a larger diameter. 1st punch rod 41 and 2nd
The punch rod 42 is vertically attached to a punch rod fixing base 45, and a punch moving cylinder 43 for moving the punch rod up and down is mounted on the upper part of the punch rod fixing base 45. A plastic working cylinder 44 for reciprocating the punch bar in the direction of the gripping mechanism is attached to the back of the punch bar fixing base 45.

In this embodiment, two punches, a first punch bar 41 and a second punch bar 42, are attached to perform a two-stage drawing process. However, as another example, a single punch bar is used. Naturally, it is also possible to perform one-step drawing.

Cylinder 23 for holding clamp jig, cylinder 31 for moving gripping mechanism, cylinder 4 for moving punch
3. A fluid pressure cylinder is used for the plastic working cylinder 44 and the cutting rotary table moving cylinder 53.
Specifically, a hydraulic cylinder or a pneumatic cylinder is used.

The cutting mechanism 5 comprises a cutting rotating section 51, a cutting motor 52, a cutting turntable moving cylinder 53, and a cutting blade 54. These are almost the same as the structure of a general cutting machine, and the cutting rotary unit 51 is reciprocated by a cutting rotary table moving cylinder 53.

The control method of the present processing apparatus includes a gripping mechanism 2 having a clamp portion for detachably holding a workpiece and a vertical movement means for vertically moving the clamp portion. A moving mechanism 3 for moving, a plastic working mechanism 4 having a punch portion for plastically processing the end face of the workpiece, and having a vertical moving means and a horizontal moving means for vertically moving and horizontally moving the punch, and cutting the workpiece; The machining mechanism 5 controls the machining for each step or fully automatic by the control mechanism 6. In addition,
By switching the control to manual, each handle (not shown) can be operated and manually moved and adjusted.

The pipe processing apparatus according to the present invention is configured as described above, and performs processing as follows. FIG.
FIG. 2 is a front sectional view showing a main part of a first-stage plastic working state.
In the figure, as shown in FIG. 3 (a), one surface of the outer periphery of the end of the tubular body before processing is cut. When the start button of the control mechanism 6 is pressed while the pipe body is placed on the lower clamp die 21 with the end face to be processed facing the punch side, the upper clamp die 22 is pushed down by the clamping cylinder 23, and Hold the tube. When a sensor (not shown) confirms that the cylinder is normally gripped, the plastic working cylinder 44 advances, pushes out the first punch rod 41, and the punch rod is inserted into the inside of the tube, and the tube is inserted into the tube. The end face is expanded. After the expansion, the cylinder 44 moves backward and returns to the original position.

FIG. 6 is a sectional view of a main part of the front showing a state of plastic working in the second stage. In the figure, a punch moving cylinder 43 pushes down a punch rod fixing base 45 so that the axis of the second punch rod 42 and the axis of the tube are aligned. Next, the cylinder 44 advances, pushes out the second punch rod 42, the punch rod is inserted into the inside of the tube, and the end of the tube is expanded again. After expansion, the plastic working cylinder 44
Returns to its original position.

Next, the gripping mechanism moving cylinder 31 is actuated to move the gripping mechanism 2 to the cutting area, thereby aligning the axis of the cutting rotation axis with the axis of the tube, and positioning the same. The cutting process is performed while the cutting blade 54 is rotated by activating the cutting blade 52. After the processing is completed, the cutting mechanism 5 is returned to the original position by the rotary table moving cylinder 53 for cutting, and is returned to the original position by the gripping mechanism moving cylinder 31. The clamp jig holding cylinder 23 is raised to raise the upper clamp die 2, and the plastically processed and cut pipe is taken out.

[0023]

According to the method and apparatus for processing a pipe body according to the present invention, plastic working and cutting can be continuously performed by the same machine, so that the efficiency is performed by separate machines as in the prior art. It was dramatically improved compared to the case where In addition, since plastic processing and cutting can be performed while holding the pipe with the upper and lower clamps first, the eccentricity, uneven wall thickness, crushing, and dimension of the expanded and cut parts of the pipe are reduced. Variations and the like have been dramatically improved in quality as compared with the conventional method, and the defect rate has been greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tube processing apparatus according to the present invention.

FIG. 2 is a plan view of a tube processing apparatus according to the present invention.

3A and 3B show a tube as a workpiece, wherein FIG. 3A is a front sectional view of the tube before processing, and FIG. 3B is a front sectional view of the tube after processing.

FIG. 4 is a front view of a part of a cross section showing a gripping mechanism and a plastic working portion.

FIG. 5 is a cross-sectional view of a main part of the front showing a first-stage plastic working state.

FIG. 6 is a cross-sectional view of a main part of the front showing a second-stage plastic working state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine main body 2 Gripping mechanism 3 Moving mechanism 4 Plastic working mechanism 5 Cutting working mechanism 6 Control mechanism 21 Lower clamp type 22 Upper clamp type 23 Clamping jig holding cylinder 31 Gripping mechanism moving cylinder 41 First punch rod 42 Second punch rod 43 Punch moving cylinder 44 Plastic working cylinder 45 Punch rod fixing table 51 Cutting rotating part 52 Cutting motor 53 Cutting rotating table moving cylinder 54 Cutting knife

Claims (8)

[Claims] 1. A pipe characterized in that a pipe as a workpiece is gripped by gripping means, the pipe is plastically worked, and then the pipe is moved while being gripped by the gripping means to perform a cutting process. How to process the body. 2. An outer periphery of a pipe as a workpiece is gripped by a gripping means, an end of the pipe is expanded, and then the pipe is moved while being gripped by the gripping means to cut the expanded part. A method for processing a tubular body, characterized by processing. 3. A gripping mechanism (2) having a machine main body (1), a clamp portion for detachably holding a workpiece, and a vertical movement means for vertically moving the clamp portion; 2) a moving mechanism (3) for moving the workpiece in the horizontal direction, a punching rod for plastically processing the end face of the workpiece, and a vertical movement means for vertically and horizontally moving the punching rod; Processing mechanism (4)
And a cutting mechanism for cutting a workpiece (5)
Pipe processing device composed of: 4. A punch rod for plastically processing an end face of a workpiece includes a cylindrical portion at a tip portion of a shaft, and a diameter increasing portion gradually increased in diameter from a base end portion to a rear end portion of the cylinder. Formed,
4. The pipe processing apparatus according to claim 3, wherein the punching rod is a punch rod formed by a large-diameter cylindrical portion connected to an end of the enlarged-diameter portion. 5. The apparatus for processing a tubular body according to claim 3, wherein the punch rods are provided in two upper and lower stages. 6. A fluid pressure cylinder is used as the vertical moving means and / or the horizontal moving means.
6. The apparatus for processing a tubular body according to claim 5. 7. A bed provided with a gripping mechanism (2) having a clamp portion for detachably holding a workpiece and a vertical movement means for vertically moving the clamp portion, provided on an upper portion of the machine body (1). 7. The apparatus for processing a tubular body according to claim 3, wherein a moving mechanism (3) that slides in a horizontal direction. 8. A gripping mechanism (2) having a clamp portion for detachably holding a workpiece and having up-and-down moving means for vertically moving the clamp portion, and horizontally moving the gripping mechanism (2). A moving mechanism (3), a plastic working mechanism (4) having a punch portion for plastically processing the end face of the workpiece, and having a vertical moving means and a horizontal moving means for vertically moving and horizontally moving the punch; A control mechanism (6) for controlling a cutting mechanism (5) for cutting an object
The pipe processing apparatus according to claim 3, further comprising: