JPS6130228A - Tubeend press work device - Google Patents

Abstract

PURPOSE:To elevate the work efficiency by fitting a punch guide and clamp on the conical face which is on the same center line as well as holding in free direction a work punch and punch guide via a holder. CONSTITUTION:A punch guide 4 holds a work punch 6 movable in the axial direction and a holder 8 holds the punch guide 4 and punch 6 freely in axial direction, in the right angled direction with the axis and in the inclining direction to the axis. A recessed conical face 3 fitting on the same center line with the projected conical face 2 of a clamp 1 is formed at the side end of the punch head 5 of the punch guide 4. A punch work is performed after the conical faces 2, 3 are fitted with pushing forward the work punch 6 in the direction of the clamp 1 by a press cylinder rod 25 after a tubular material is clamped by a clamp cylinder. The fitting and centering of a tubular material is made easy with this method and the work efficiency is elevated.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an apparatus for pressing the end of a metal tube.

[Conventional technology]

The end of a tube with a small diameter of 8 to 30 mm as shown in FIG. 6(a) is press-worked as shown in FIG. 6(1) after going through the steps shown in FIG. If the center of the clamped pipe and the center line of the punch head are not in a straight line, the processed part will be eccentric or inclined with respect to the pipe center line. As disclosed in Publication No. 1.638, a device is installed on a single base so that the center lines of the clamping part of the pipe and the processing punch coincide with each other. If you prepare a number corresponding to the number of processing steps and use a device corresponding to the diameter of the pipe to be processed and the number of steps, the outer diameter of the pipe to be processed,
Even if the number of processes changes, the pipe end can be machined with high center accuracy without adjusting the centering between the clamp and processing punch or performing test processing. However, with such a device, the tube must be fixed to the clamp of the device and removed from the clamp each time the steps shown in Fig. 6(b), (c), and (a) are performed. Since it is not possible to perform the steps sequentially by changing the machining punch while the tube is fixed in one clamp, the machining efficiency is reduced due to the time it takes to replace the tube. Conventionally, the tube was held in a clamp and fixed in place.
When trying to process efficiently by changing punches one after another, it takes a long time to center the processing punch each time the pipe diameter changes.
Efficiency could not be improved when processing a wide variety of products in small quantities.

[Problem that the invention seeks to solve]

The present invention solves the above problems in a device that processes the end of a pipe by moving a machining punch to a machining position while fixing the pipe with a clamp, and enables precise centering adjustment of the machining punch with respect to the clamp. The object of the present invention is to provide a tube end press processing apparatus that can easily perform high-mix, low-volume production without the need for a press machine.

[Means for solving problems]

In order to achieve the above object, the present invention provides a punch guide formed to fit with a clamp on a conical surface, and fits the punch guide with the clamp on a conical surface prior to machining of a processing punch, This fitted punch guide is used as a guide for the processing punch, and processing can be performed, and the punch guide and processing punch are held by a holder that is movable in the axial direction, movable in a direction perpendicular to the axial direction, and tiltable in the axial direction. The punch guide of the first invention is held so as to be movable in the axial direction,
A structure in which the punch guide is supported by a holder,
The second invention has a structure in which the processing punch is directly supported by the holder and the punch guide is supported by the processing punch,
The third invention has a structure in which both the processing punch and the punch guide are supported by a holder.

〔Example〕

1 to 3 show an embodiment of the first invention. In FIG. 2, the clamp] consists of a fixed piece [a] and a movable piece 1b, and the fixed piece 1a is a base attached to the pedestal 17 along the base plate 14 fixed to the pedestal 17.
9 with pin 18.

Substrate 14. A mounting piece 15 is attached to the base 19 through a dovetail groove 16 so as to be removable, and the movable piece 1b is attached to the mounting piece 15 with a pin 18. Fixed piece 1a and movable piece 1
A clamp groove 1 having a semicircular cross section is provided on the surface facing the b.
c are formed facing each other. The clamp groove 1c is formed to form a perfect circular hole with the opposing surfaces of the fixed piece 1a and the movable piece 1b in contact with each other, and the diameter of this hole is the same when the pipe to be processed into the clamp groove 1c is held between the two sides. In order to prevent the tube from escaping under processing pressure, it is usually made to have a small diameter of 0.05 to 0.2 mm, although this varies depending on the size of the tube diameter and the material. A clamp groove 1 is formed on the outer periphery of the fixed piece 1a and the movable piece 1b so that they are in contact with each other.
When the hole is formed at point c, the convex conical surface 2 is formed by aligning the center line of the hole with the center line. Cylindrical processing punch 6
A punch head 5 having a machining surface formed of cemented carbide is fixed to one end by brazing or the like, and a machining punch 6 is disposed with the punch head 5 facing the clamp 1 side. A cylindrical punch guide 4 is fitted on the outer periphery of the punch 6 so as to be movable in the axial direction with respect to the processing punch 6. The punch guide 4 has a cylindrical punch guide 4 fitted on the outer periphery of the processing punch 6 so as to be movable in the axial direction. A concave conical surface 3 is formed so that the center lines coincide with each other and the convex conical surface 2 of the clamp 1 fits flush with the concave conical surface 3 . A collar is formed on the opposite side of the processing punch 6 to the punch head 5, and a spring 7 is inserted between the collar and the end of the punch guide 4. When the processing punch 6 is moved toward the clamp 1 as shown in FIG. A punch guide 4 is positioned relative to the processing punch 6 so that the conical surface 3 fits therein. A holder 8 is disposed on the outer periphery of the punch guide 4, a ball 1'0 is brought into contact with the outer periphery of the punch guide 4 and held by the holder 8, a spring 11 presses the ball 10 against the punch guide 4; A presser foot 12 is provided on the holder 8. The ends of the punch guide 4 and the holder 8 are connected by a catch 41J ring 13 so that they can move slightly in all directions.

The holder 8 is axially movably fitted into the inner surface of a cylinder 9 formed at intervals on a circumference passing on the center line of the clamp 1 on the outer periphery of the rotary plate 2o. As shown in Figure 1,
The center of the rotating plate 20 is fixed to the rotating shaft 21.
is supported by a bearing 22. The bearing 22 is rotated by a motor 23 provided on the pedestal 17.

A press cylinder 24 is provided on the pedestal 17, and its rond 25 is provided so that the center line of the clamp 1 coincides with the center line. On board] 7+□, a cylinder 26 is connected to a mounting piece 15 to which a movable piece 1b is attached, and is attached to one board.

In the fourth figure showing the embodiment of the second invention, the holder 8 includes an outer cylinder 27, an inner cylinder 28 disposed inside the outer cylinder 27, and an outer cylinder 2.
A rubber ring 29 is inserted between the inner cylinder 7 and the inner cylinder 28 and connects the two. The outer cylinder 27 of the boulder~8 is fixed in a hole provided in the rotary plate 2o, and the inner cylinder 28 is fitted to the outer circumference of the rear end of the processing punch 6 so as to be movable in the axial direction, and directly holds the processing punch 6. A punch guide 4 is fitted and held on the outer periphery of the zero processing evaporator 6 on the punch head 5 side so as to be movable in the axial direction. The rest is the same as the embodiment of the first invention.

In FIG. 5 showing an embodiment of the third invention, the holder 8 is constructed in the same manner as in the fourth figure, and the processing punch 6 is also directly supported by the holder 4 as in the fourth figure, but the punch guide 4 is not supported by the machining punch 6, but has its outer circumferential surface held on the inner circumferential surface of the inner cylinder 28 of the holder 8 so as to be movable in the axial direction like the machining/gun punch 6. In this example,
The outer peripheral surface of the punch guide 4 is supported by the holder 8,
Furthermore, the inner circumferential surface may be fitted to the outer circumference of the processing punch 6 so as to be relatively movable in the axial direction.

Furthermore, in the embodiments shown in FIGS. 4 and 5, the holder 8 may be provided so as to be movable in the axial direction with respect to the rotating plate 20, and the processing punch 6 may be fixed to the holder 8. Fix the punch guide 4 to the boulder h, and press the processing punch 6.
may be provided on the holder 8 so as to be movable in the axial direction.

[Effect]

In the embodiment shown in FIGS. 1 to 3, the pipe 30 to be processed is inserted along the clamp groove 1C of the fixed piece 1a with the movable piece 1b separated from the fixed piece 1a as shown in FIG. Then, using a gauge, maintain the protruding length from the end of the clamp groove [C] to the punch head 5 side at the planned length, and operate the clamp cylinder 26 to crimp the movable piece 1b to the fixed piece [a] and attach the tube 30. Clamp. Next, the motor 23 is operated to rotate the rotating plate 20, and the portion of the holder 8 that holds the processing punch 6 for the first step is rotated in line with the clamp 1 and stopped. Next, the press cylinder 24 is operated to push the processing punch 6 toward the clamp 1 with the rod 25. By this operation, the punch guide 4 supporting the processing punch 6 advances the processing punch 6, the punch guide 4, and the holder 8 connected to the punch guide 4 toward the clamp 1 by the spring 7. The punch guide 4 is supported by the holder 8 so as to be movable in the axial direction, in a direction perpendicular to the axial direction, and in a direction inclined to the axial direction by means of a ball 10, etc. The punch guide 4 moves freely in the direction 1, and the concave conical surface 3 of the punch guide 4 fits into the convex conical surface 2 of the clamp 1. The convex conical surface 2 of the clamp 1 is made so that its center line coincides with the center line of the clamp, and the concave conical surface 3 of the punch guide 44 is made so that its center line coincides with the processing surface of the punch head 5 of the processing punch 6. Since the convex conical surface 2 and the concave conical surface 3 fit together, the center line of the clamp 1 and the center line of the punch head 5 are aligned in a straight line. After the spring 7 is compressed, the processing punch 6 is pressed.
When the rod 25 continues to push the pipe toward the clamp 1, the processing punch 6 is guided by the punch guide 4 and the punch head 5 presses and processes the end of the pipe 30, so that the pipe end processing surface is concentric with the pipe. Processed with high precision. Therefore, when the processing punch 6 is positioned opposite the clamp 1,
Even if the center line of the machining punch 6 is slightly eccentric or tilted with respect to the center line of the clamp, it is corrected by the punch guide 4 so that it is aligned with the clamp 1, so the rotation of the machining punch 6 is prevented. The attachment to the plate 20 does not have to be done precisely.

In the embodiment shown in FIGS. 4 and 5, the deformation of the rubber ring 29 allows the processing punch 6 and the punch guide 4 to move in a direction perpendicular to the axial direction and tilt with respect to the axial direction.

〔Effect of the invention〕

According to the present invention, the processing punch and the punch guide are directly or indirectly held by the holder so as to be movable in the axial direction, movable in a direction perpendicular to the axial direction, and tiltable in the axial direction,
The punch guide is fitted with its conical surface aligned with the clamp, and the punch guide is used as a guide to press the pipe held in the clamp, allowing for precise centering of the punch. It can be attached to a processing device without requiring a holder, and can efficiently perform high-quality, small-quantity tube end press processing.

[Brief explanation of drawings]

FIG. 1 is an overall side view of an example of a tube end press processing apparatus using the first invention, FIG. 2 is a sectional view of an embodiment of the first invention shown in FIG. 1, and FIG. 3 is similar to FIG. The same figure is a cross-sectional view showing the state immediately before the clamp and punch guide are fitted and the pipe is processed, Figure 4 is a diagram similar to Figure 3 of an embodiment of the second invention, and Figure 5 is the same as Figure 3. Figures 6(a) to 6(a) to (→ are diagrams showing an example of the order of press working of the tube end) are similar to FIG. 3 of an embodiment of the invention. ■ Clamp, 1a, Fixing piece, 1b・・Movable piece-10
...Clamp groove, 2..Convex conical surface, 3..Concave conical surface, 4.
...Punch guide, 5°・Punch head, 6・Processed corbel, 7・Spring, 8・Holder, 9・Cylinder, 10・
・Ball, 1] ・Spring, 12 ・Spring holder, 】 3 ・ Locking ring, 1 piece 4 ・ Board, ] 5 ・ Mounting piece, ] 6 ・ Dovetail groove, 17 ・ Frame, 18 ・Pin, 19... Base, 2
0... Rotating plate, 2]... Rotating shaft, 22... Bearing, 23...
・Motor, 24...Press cylinder, 25...Rod, 26...Clamp cylinder, 27...Outer cylinder, 28
・Inner cylinder, 29...Rubber ring, 30...Pipe.

Claims (3)

[Claims] (1) A clamp consisting of a fixed piece and a movable piece, a machining punch with a punch head provided at one end positioned on the clamp side, and a machining punch that is fitted to the outer periphery of the machining punch so that the machining punch can be moved in the axial direction. A punch guide to be held, a concave or convex conical surface formed on the punch head side end of the punch guide so that the center line of the punch head matches the center line, and a concave or convex conical surface formed on the punch head side end of the punch guide, and a punch with the clamp center line and the center line matching the outer periphery of the clamp. The convex or concave conical surface formed to fit with the concave or convex conical surface of the guide and the concave or convex conical surface of the punch guide are processed before the punch head of the punch contacts the pipe end supported by the clamp. A spring is inserted between the processed punch and the punch guide so as to position the punch guide in a position where it fits with the convex or concave conical surface of the clamp, and a spring is placed on the outer periphery of the punch guide to allow the punch guide to move in the axial direction. A tube end press processing device characterized by comprising a holder that is movable in a direction perpendicular to the direction and held so as to be tiltable in the axial direction. (2) A clamp consisting of a fixed piece and a movable piece, a processing punch with a punch head provided at one end positioned on the clamp side, and a punch fitted to the outer periphery of the processing punch on the punch head side so as to be movable in the axial direction a concave or convex conical surface formed on the punch head side end of the punch guide by aligning the center line of the punch head with the center line; and a concave or convex surface formed on the outer periphery of the clamp with the center line of the clamp aligned with the center line of the punch guide. Alternatively, the convex or concave conical surface formed to fit with the convex conical surface and the concave or convex conical surface of the punch guide are processed before the punch head of the punch contacts the pipe end supported by the clamp. A spring is inserted between the processing punch and the punch guide to position the punch guide in a position where it fits with the convex or concave conical surface, and a spring is placed on the outer periphery of the processing punch to allow the processing punch to move in the axial direction. A tube end press processing device characterized by comprising a holder that is movable in a right angle direction and held so as to be tiltable in an axial direction. (3) A clamp consisting of a fixed piece and a movable piece, a processing punch with a punch head provided at one end positioned on the clamp side, a punch guide placed on the outer periphery of the processing punch on the punch head side, and a processing punch. and a holder that is fitted onto the outer periphery of the punch guide and holds them movable in the axial direction, movable in a direction perpendicular to the axial direction, and tiltable in the axial direction, and an end on the punch head side of the punch guide held in the holder. A concave or convex conical surface formed by aligning the center line of the punch head with the center line and a concave or convex conical surface of the punch guide with the clamp center line and center line aligned with the outer periphery of the clamp. Processing the convex or convex conical surface formed on the punch guide and the concave or convex conical surface of the punch guide to a position where it fits with the convex or convex conical surface of the clamp before the punch head of the punch contacts the pipe end supported by the clamp. A tube end press processing device characterized by comprising a spring inserted between a processing punch and a punch guide so as to position the punch guide.