JPS6316209B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] 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 3 to 30 mm as shown in Figure 6 a is processed through the steps shown in Figure 6 b and c to form Figure 6 d.
If the center of the clamped tube and the center line of the punch head are not aligned in a straight line when press working, as in the case of press working, the processed part will be eccentric or inclined with respect to the tube center line. Jitsukai Showa 53-
As disclosed in Publication No. 44638, a device is installed on a single base so that the center lines of the pipe clamp and the processing punch coincide with each other. If you prepare the number corresponding to the number of processes and use the number of devices corresponding to the diameter of the pipe to be processed and the number of processes, the clamp and processing punch can be used even if the outer diameter of the pipe to be processed or the number of processes changes. Tube ends can be machined with high center accuracy without centering adjustment or test machining. However, with such a device, each time the steps shown in Fig. 6b, c, and d are performed, the tube must be fixed to the clamp of the device and the tube must be removed from the clamp. Since it is not possible to change the machining punch and perform the steps sequentially while the tube is fixed, the machining efficiency is reduced due to the time it takes to replace the tube. Conventionally, when attempting to process efficiently by changing the processing punch one after another while holding the pipe in a clamp, it took a long time to center the processing punch each time the pipe diameter changed, and it was difficult to process a wide variety of products. When processing items in small quantities, efficiency could not be improved.

[Problem that the invention seeks to solve]

The present invention solves the above problems in an apparatus that processes the end of a pipe by moving a processing punch to a processing position while holding the pipe to be processed with a clamp.
It is an object of the present invention to provide a tube end press processing device that does not require precise centering adjustment of a processing punch with respect to a clamp and can easily perform small-lot, high-mix production.

[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,
The fitted punch guide is used as a guide for the processing punch, and processing is enabled, 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 first
The invention has a structure in which a processing punch is held such that a punch guide is movable in the axial direction, and the punch guide is supported by a holder.A second invention is a processing punch in which a processing punch is directly supported by a holder, and a punch guide is supported by the processing punch. The third invention has a structure in which both a processing punch and a punch guide are supported by a holder.

〔Example〕

1 to 3 show an embodiment of the first invention. In FIG. 2, the clamp 1 consists of a fixed piece 1a and a movable piece 1b, and the fixed piece 1a is attached to a base 19 attached to the pedestal 17 with pins 18 along a base plate 14 fixed to the pedestal 17. ing. The substrate 14 has a dovetail groove 16, and the base 1
A mounting piece 15 is attached to the mounting plate 9 so as to be removable.
The movable piece 1b is attached to the mounting piece 15 with a pin 18. Clamp grooves 1c having a semicircular cross section are formed on opposing surfaces of the fixed piece 1a and the movable piece 1b. The clamp groove 1c is the fixed piece 1a
A perfect circular hole is formed with the opposing surfaces of the movable piece 1b in contact with each other, and the diameter of this hole is such that when the tube to be processed is held in the clamp groove 1c, the tube will not respond to the processing pressure. In order to prevent leakage, the tube is usually made with a small diameter of 0.05 to 0.2 mm, depending on the size and material. When a hole is formed on the outer periphery of the fixed piece 1a and the movable piece 1b with the clamp groove 1c, a convex conical surface 2 is formed so that the center line of the hole coincides with the center line of the hole.
is formed. A punch head 5 having a machining surface formed of cemented carbide is fixed to one end of the cylindrical machining punch 6 by brazing or the like, and the machining punch 6 is arranged with the punch head 5 facing the clamp 1 side. A cylindrical punch guide 4 is fitted on the outer periphery of the processing punch 6 so as to be movable in the axial direction with respect to the processing punch 6.
A concave conical surface 3 is formed at the side end so that the center line of the processed surface of the punch head 5 coincides with the center line, and the concave conical surface 2 of the clamp 1 is fitted in a plane. A flange is formed on the opposite side of the processing punch 6 from the punch head 5, and a spring 7 is inserted between the flange and the end of the punch guide 4. This spring 7
The machining punch 6 is clamped to the clamp 1 as shown in Fig. 3.
When the punch head 5 touches the end of the tube 30 held by the clamp 1,
A punch guide 4 is positioned relative to the processing punch 6 so that the concave conical surface 3 fits into the convex conical surface 2. A holder 8 is arranged on the outer periphery of the punch guide 4, a ball 10 is brought into contact with the outer periphery of the punch guide 4 and held by the holder 8, and a spring 1 is arranged to press the ball 10 into contact with the punch guide 4.
1. A spring retainer 12 for the spring 11 is provided on the holder 8. The ends of the punch guide 4 and the holder 8 are connected by a locking ring 13 so that they can move slightly in all directions. Holder 8 is rotating plate 2
The clamp 1 is 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 clamp 1 so as to be movable in the axial direction. As shown in FIG. 1, the center of the rotating plate 20 is fixed to a rotating shaft 21, and the rotating shaft 21 is supported by a bearing 22. As shown in FIG. The bearing 22 is adapted to be rotated by a motor 23 provided on the pedestal 17. A press cylinder 24 is provided on the pedestal 17, and its rod 25 is connected to the clamp 1.
The center line of the center line is aligned with the center line of the A clamp cylinder 26 is connected to the mounting piece 15 to which the movable piece 1b is attached to the substrate 14, and
installed on.

In FIG. 4 showing the embodiment of the second invention, the holder 8 includes an outer cylinder 27 and an inner cylinder 2 disposed inside the outer cylinder 27.
8, and a rubber ring 29 inserted between the outer cylinder 27 and the inner cylinder 28 to connect them. The outer cylinder 27 of the holder 8 is fixed to a hole provided in the rotary plate 20, 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 relative axial direction, and directly holds the processing punch 6. . A punch guide 4 is fitted and held on the outer periphery of the processing punch 6 on the side of the punch head 5 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 FIG. 4, and the processing punch 6 is also directly supported by the holder 4 as in FIG. 4, but the punch guide 4 is It is not supported by the processing punch 6, but its outer peripheral surface is held on the inner peripheral surface of the inner cylinder 28 of the holder 8 so as to be movable in the axial direction like the processing punch 6. In this embodiment, the outer circumferential surface of the punch guide 4 may be supported by the holder 8, and the inner circumferential surface may be fitted to the outer circumference of the processing punch 6 so as to be 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. The punch guide 4 may be fixed to the holder 8, and 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,
As shown in FIG. 2, with the movable piece 1b separated from the fixed piece 1a, insert the pipe 30 to be machined along the clamp groove 1c of the fixed piece 1a, and use a gauge to punch the punch head 5 from the end of the clamp groove 1c. The tube 30 is clamped by operating the clamp cylinder 26 to press the movable piece 1b to the fixed piece 1a while keeping the sideward protrusion length at a predetermined length. 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. Through this operation, the punch guide 4 supporting the processing punch 6 is moved to the clamp 1 by the spring 7, and the punch guide 4 and the holder 8 connected to the punch guide 4 are held together with the processing punch 6.
advance towards. Punch guide 4 is the ball 1
0 etc., it is supported by the holder 8 so that it can move in the axial direction, in a direction perpendicular to the axial direction, and in a direction inclined to the axial direction, so it can move freely in any of these directions. , the concave conical surface 3 of the punch guide 4 is fitted into the convex conical surface 2 of the clamp 1. Convex conical surface 2 of clamp 1
The concave conical surface 3 of the punch guide 4 is formed so that its center line coincides with the center line of the clamp 1, and the concave conical surface 3 of the punch guide 4 is formed so that its center line coincides with the machining surface of the punch head 5 of the processing punch 6. Due to the fitting between the conical surface 2 and the concave conical surface 3, the center line of the clamp 1 and the center line of the punch head 5 are aligned. After reaching this state, when the spring 7 is compressed and the processing punch 6 is continued to be pushed toward the clamp 1, the processing punch 6 is guided by the punch guide 4 by the rod 25, and the punch head 5 holds the end of the pipe 30. Since the process is performed under pressure, the pipe end surface is machined concentrically with the pipe with high precision. Therefore, when the machining punch 6 is positioned opposite the clamp 1, even if the center line of the machining punch 6 is slightly eccentric or inclined with respect to the center line of the clamp 1, the punch guide 4 ensures that it is aligned with the clamp 1. Since the processing punches 6 are corrected so as to be positioned in a straight line, it is not necessary to attach the processing punches 6 to the rotary plate 20 precisely.

In the embodiments shown in FIGS. 4 and 5, the deformation of the rubber ring 29 allows the processing punch 6 and punch guide 4 to move in a direction perpendicular to the axial direction and to 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 the direction perpendicular to the axial direction, and tiltable in the axial direction, and the punch guide is clamped with a conical surface. They are fitted in a straight line, and the punch guide is used as a guide to press the pipe holding the processing punch in the clamp, so there is no need for precise centering of the processing punch.
It can be attached to processing equipment and can efficiently perform high-quality, small-quantity tube end press processing.

[Brief explanation of the drawing]

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, FIG. 4 is a view similar to FIG. 3 of an embodiment of the second invention, and FIG. Figures similar to Figure 3 of an embodiment of the invention, Figures 6 a to d
FIG. 2 is a diagram showing an example of the order of press working of tube ends. 1... Clamp, 1a... Fixed piece, 1b... Movable piece, 1c... Clamp groove, 2... Convex conical surface, 3
... Concave conical surface, 4 ... Punch guide, 5 ... Punch head, 6 ... Machining punch, 7 ... Spring, 8 ...
...Holder, 9...Cylinder, 10...Ball, 11
... Spring, 12 ... Spring holder, 13 ... Locking ring, 14 ... Board, 15 ... Mounting piece, 16 ... Dovetail groove, 17 ... Frame, 18 ... Pin, 19 ... Base, 20... Rotating plate, 21... Rotating shaft, 22...
Bearing, 23... Motor, 24... Press cylinder, 25... Rod, 26... Clamp cylinder, 27... Outer cylinder, 28... Inner cylinder, 29... Rubber ring, 30... Tube.

Claims (1)

[Scope of 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 onto the outer periphery of the machining punch and moves the machining punch in the axial direction. A punch guide to be held movably, 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 coincides with the center line, and a clamp center line and the center line coincide with the outer periphery of the clamp. The convex or concave conical surface formed to fit with the concave or convex conical surface of the punch 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, a punch guide fitted to the outer periphery of the processing punch on the punch head side so as to be movable in the axial direction, and the punch. A concave or convex conical surface formed on the punch head side end of the guide 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 aligned with the center line on the outer periphery of the clamp. Processing the convex or concave conical surface formed to fit with the concave or concave conical surface of the punch guide and the convex or concave conical surface of the clamp before the punch head of the punch contacts the pipe end supported by the clamp. A spring inserted between the processing punch and the punch guide to position the punch guide in the matching position, and a spring placed on the outer periphery of the processing punch that allows the processing punch to move in the axial direction and at right angles to the axial direction.
A tube end press processing device characterized by comprising a holder that can be held tiltably in the axial direction. 3. A clamp consisting of a fixed piece and a movable piece, a processing punch arranged with a punch head provided at one end positioned on the clamp side, a punch guide arranged on the outer periphery of the processing punch on the punch head side, and a processing punch and a punch guide. Fitted on the outer periphery, these can be moved in the axial direction, and can be moved in the direction perpendicular to the axial direction.
A holder that can be tilted in the axial direction, a concave or convex conical surface formed on the punch head side end of the punch guide held by the holder so that the center line of the punch head coincides with the center line, and a clamp on the outer periphery of the clamp. A convex or concave conical surface formed to match the center line and fit with the concave or convex conical surface of the punch guide, and a concave or convex conical surface of the punch guide are processed so that the punch head of the punch is clamped. A tube characterized by comprising a spring inserted between a processing punch and a punch guide so as to position the punch guide at a position where it fits with a convex or concave conical surface of a clamp before coming into contact with a supported tube end. Edge press processing equipment.