JPH0481239A - Pipe shaft and method and apparatus for working this thereof - Google Patents

Abstract

PURPOSE:To enable working having high concentricity, which axis center of a tubular member itself accurately corresponds to center of the worked part, by arranging a pipe holding member and an engaging part for executing positioning of a punching member. CONSTITUTION:The punch 13 consists of a columnar shaped punch body 16 and a fitting part 17 integrally arranged to a base end part of this punch body 16, and this first punch 13 is fitted to a punch holder 12 through the fitting part 17. At tip face 16a of the above punch body 16, a recessed part 18 according to working shape of a material to be worked, is formed and this recessed part 18 has a tapered part 19 for smoothly introducing the tip part of pipe F in the recessed part 18 and a diameter reduced part 20 having inner diameter (d1) finished in order to reduce the diameter of pipe P to the prescribed outer diameter. At the time of executing the punching, by fitting the tip part of punch to punch receiving parts 11, 12 in both clamping members 4, 5, the axis of pipe P as the material to be worked accurately corresponds to the center of punch for executing the working.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pipe shaft used in a drive system of office equipment such as an electrophotographic copying machine and a printer, a processing method thereof, and a processing device, and particularly relates to a pipe shaft used in a drive system of office equipment such as an electrophotographic copying machine and a printer. The present invention relates to a pipe shaft having a portion or a tapered portion, a processing method thereof, and a processing device.

[Conventional technology]

Conventionally, office equipment such as electrophotographic copying machines and printers has many rotating parts such as photoconductor drums, developing units, fixing units, and recording paper conveyance systems, and a drive system for driving these rotating parts is required. It is equipped with This drive system uses many shaft members for pivotally supporting the rotating members and transmitting driving force to the rotating members.

Incidentally, hollow pipe shafts have been increasingly used as shaft members for the drive systems of the above-mentioned office equipment in place of solid shafts for the purpose of reducing the weight and cost of the drive systems. Mechanical parts such as gears, pulleys, bearing members, etc. are attached to predetermined positions on this pipe shaft, so that predetermined members are rotationally driven and driving force is transmitted to other members.

To attach mechanical parts such as gears and pulleys to predetermined positions on the pipe shaft, a locking ring is fitted into the groove formed in the pipe shaft, and the mechanical parts can be attached to the predetermined positions using this locking ring. It is being done.

However, in this case, since mechanical parts such as gears and pulleys are attached to predetermined positions on the pipe shaft, it is necessary to position the mechanical parts in the axial direction. Therefore,
It is necessary to provide a locking ring on both sides of the machine part, which increases the number of parts and requires the formation of many locking grooves to lock the locking ring to the pipe shaft, which increases processing costs. There was a problem.

Therefore, in order to solve the above problem, a narrow diameter part that is thinner than the outer diameter of the pipe shaft is provided at the end of the pipe shaft, and a stepped part is formed between this narrow diameter part and the other part of the pipe shaft. do. It is also possible to reduce the number of locking rings used by half by positioning one end side of a mechanical component such as a gear using this stepped portion.

A swaging method, a punch press method, and the like are known as processing methods capable of performing so-called stepped processing in which a step is formed at the end of the pipe shaft.

The swaging method described above involves processing a pipe member into a predetermined shape by applying a blow to the pipe member from the periphery.

In addition, in the punch press method, a punch having a recess corresponding to the shape of the workpiece is press-fitted into the end of a pipe member that is held in a fixed state, thereby shaping the end of the pipe member into a predetermined shape. It is something to be processed.

[Problem to be solved by the invention]

However, the above conventional technology has the following problems. In other words, in the case of the former swaging method, the pipe member is machined into a predetermined shape by applying a blow to the pipe member from the surrounding area, so the processing speed is slow, the noise is high, the processing accuracy is low, and the shaft There is a problem in that post-processing is required when used for.

In addition, in the case of the latter punch press method, the shape of the workpiece is determined by the shape of the recess of the punch, so it is possible to perform processing with relatively high processing accuracy and, moreover, the processing speed is high. However, this punch press method is generally a method for processing gas or liquid piping, and merely processes the end portion of a tubular member into a predetermined shape. For this reason, it is difficult to perform highly concentric machining in which the axis of the tubular member itself and the center of the machined part are precisely aligned, and when this is used for a pipe shaft, it may cause eccentricity and damage to the drive system. There was a problem that it could not be used for shaft members.

[Means to solve the problem]

Therefore, this invention is an attempt to solve the above-mentioned problems of the prior art, and its purpose is to basically utilize the advantages of the punch press method while adding a step or taper to the end. It is an object of the present invention to provide a pipe shaft having a high processing speed and low noise, which can be manufactured with high precision and high concentricity, a processing method thereof, and a processing device.

That is, in the pipe shaft according to the present invention, by relatively press-fitting the end of the pipe member held by the pipe holding means into the recess of the punch member, a processed portion having a predetermined shape is formed in the end of the pipe member. In the formed pipe shaft, at least one of the pipe holding means and the punch member is provided with an engaging portion that positions the pipe holding means and the punch member by relatively engaging with the pipe holding means or the punch member. When the end of the pipe member held by the pipe holding means is relatively press-fitted into the recess of the punch member, the engaging portion positions the pipe holding means and the punch member. It is configured to form a processed portion of a predetermined shape on the end portion.

Further, the method for processing a pipe shaft according to the present invention includes forming a processed portion of a predetermined shape at the end of the pipe member by relatively press-fitting the end of the pipe member into the recess of the punch member. In the processing method, when the end of the pipe member is relatively press-fitted into the recess of the punch member, the positioning of the pipe holding means for holding the pipe member and the punch member is controlled by at least one of the pipe holding means and the punch member. The device is configured to do this by means of an engaging portion provided in the .

Furthermore, the pipe shaft processing device according to the present invention includes:
A pipe shaft processing apparatus comprising a pipe holding means for holding a pipe member and a punching member having a recess for processing an end of the pipe member into a predetermined shape, at least one of the pipe holding means and the punching member. To,
It is configured to provide an engaging portion that positions the pipe holding means and the punch member by relatively engaging with the pipe holding means or the punch member.

[Effect]

In the pipe shaft, its processing method, and processing apparatus according to the present invention, the pipe holding means and the punching member are relatively engaged with at least one of the pipe holding means and the punching member. An engaging part for positioning is provided, or the pipe holding means and the punch member are positioned by this engaging part. Therefore, when the end of the pipe member is relatively press-fitted into the recess of the punch member, at least one of the pipe holding means and the punch member is provided to position the pipe holding means for holding the pipe member and the punch member. Since the axial center of the pipe member held by the pipe holding means can be accurately aligned with the axial center of the recess of the punch member, the concentricity can be improved. Accordingly, it is possible to provide a pipe shaft with high quality, a method for processing the same, and a processing device.

〔Example〕

The present invention will be explained below based on illustrated embodiments.

FIG. 2 shows an embodiment of a pipe shaft processing apparatus according to the present invention. In the figure, ■ indicates the processing equipment main body, and this processing equipment main body l has a pipe clamp 2 on its upper part that holds the pipe P that is the workpiece.
It also has a slide unit 3 to which a punch is slidably attached in the horizontal direction.

= 9 That is, a pipe clamp 2 is attached to the right end of the upper part of the processing apparatus main body 1 for holding the pipe P, which is a workpiece, in a clamped state. As shown in FIGS. 3(A) and 3(B), this pipe clamp 2 is composed of a pair of clamp members 4.5 that can be divided into upper and lower parts, and each clamp member 4.5 has a A groove 6.7 with a semicircular cross section and an inner diameter corresponding to the outer diameter of the pipe P to be held is bored in the surface to be held.

Further, the lower clamp member 4 is fixedly attached to the processing apparatus main body 1, as shown in FIG. On the other hand, the upper clamp member 5 can be moved up and down by a vice cylinder 8 attached to the upper part of the processing device main body 1. By moving this clamp member 5 downward by the vice cylinder 8, the lower clamp member 5 can be moved up and down. The pipe P can be held in a sandwiched state with the member 4. Note that 9 and IO indicate a limit switch for stopping the upper clamp member 5 at a predetermined position.

Furthermore, as shown in FIG. 3, the pipe clamp 2 is provided with the tip of a punch, which will be described later, on the tip surfaces 4a and 5a of both clamp members 4.5 while the pipe is held by the upper and lower clamp members 4.5. The punch receiver is provided with parts 11 and 12 for positioning the punch by engaging the parts. The punch receiver portion 11.12 is constituted by a recessed portion having an arcuate cross section so that its center coincides with the axis of the pipe P held by both clamp members 4.5. When performing punch processing, the tip of the punch is fitted into the punch receiver portions 11.12 of both clamp members 4.5, thereby aligning the axis of the pipe P, which is the workpiece, with the punch to be processed. The center of

Furthermore, as shown in FIG. 2, a punch holder 12 with a plurality of punches attached to the right side of the pipe clamp 2 is provided on the upper part of the processing device main body l, as shown in FIG. First punch 1 as shown
3. Three punches, the second punch 14 and the third punch 15, are installed in order at predetermined intervals in the vertical direction. These first punch 13 and second punch 14
The third punch 15 is made of cemented carbide or the like and is formed into a predetermined shape as described below.

The first punch 13, as shown in FIG. 4(A),
It is composed of a cylindrical punch body 16 and a mounting part 17 that is integrally provided at the base end of the punch body 16, and the first punch 13 is attached to the punch holder 12 via the mounting part 17. It is attached. The punch body 16
A recess 18 is formed in the tip surface 16a of the pipe P in accordance with the shape of the workpiece. 19, and a reduced diameter portion 20 having an inner diameter d1 finished to reduce the diameter of the pipe P to a predetermined outer diameter. The tapered portion 19 of the first punch 13 is set at a predetermined angle θ depending on the rate at which the diameter of the pipe P is reduced, and this angle θ is set to, for example, 20°. The inner diameter d of the reduced diameter portion 20 is determined by the machining dimensions of the pipe P, which is the workpiece, and for example, if the diameter before machining is 8 mm.
When the pipe P is finally reduced in diameter to 6.00 mm, the diameter is set to 6.70 mm as the first step of diameter reduction performed by the first punch 13.

Furthermore, the reduced diameter portion 20 has its axis aligned with the punch body 16.
It is set to precisely coincide with the axis of the outer peripheral surface 16a.

At this time, the inner diameter d of the reduced diameter portion 20 that can be processed varies depending on the material of the pipe P, its hardness, and the wall thickness of the pipe P, but is about 20% at most. Therefore, if the diameter is to be reduced further, a plurality of punches that are machined into smaller diameters are sequentially used (in this embodiment, two punches). However, since the hardness may increase due to processing,
It is desirable to perform heat treatment during punching.

Further, as shown in FIG. 4(B), the second punch 14 has a cylindrical punch body 22 similar to the first punch 13.
and a mounting portion 23 integrally provided at the proximal end of this punch body 22.
4 is also attached to the punch holder 12 via the attachment portion 23. A recess 24 corresponding to the outer shape of the workpiece is formed in the tip surface 22a of the punch body 22, and the recess 24 has a taper for smoothly introducing the pipe P into the recess 24. It has a part 25 and a reduced diameter part 26 having an inner diameter d2 that is finished to reduce the diameter of the pipe P to a predetermined outer diameter. Tapered portion 25 of this second punch 14
is set to, for example, 20°, similar to the tapered portion 19 of the first punch 13. In addition, the inner diameter d2 of the reduced diameter portion 26
is determined by the machining dimensions of the pipe P, which is the workpiece, and for example, if the first punch 13 has a diameter of 6°70
For example, the diameter of the reduced diameter part that has been reduced to 5.96 mm is expected to be expanded after processing so that the diameter of the reduced diameter part is further reduced to 6.00 mm.
It is set to mm.

Furthermore, as shown in FIG. 4(C), the third punch 15 has a cylindrical punch body 27, similar to the first punch 13.
and a mounting portion 28 that is integrally provided at the proximal end of this punch body 27.
5 is also attached to the punch holder 12 via the attachment portion 28. A recess 29 corresponding to the outer shape of the workpiece is formed in the tip surface 27a of the punch body 27, and this recess 29 has an inner diameter da ( a reduced diameter portion 30 having a diameter of 5.96 mm;
It is comprised of an edge portion 31 having a minute radius (for example, 0° 2 mm) formed between the reduced diameter portion 30 and the tip surface 27a of the punch body 27.

In addition, in FIG. 4, 21 indicates a part of the taper provided at the edge of the tip surface 16a, 22a, 27a of the punch body 16.22.27; The punch receiver is provided to facilitate fitting into the parts 11 and 12.

Punch holder 1 to which the first punch 13, second punch 14 and third punch 15 configured as described above are attached.
2 is attached to a slide mechanism 32 for the punch holder, as shown in FIG.
can be slid up and down by a slide mechanism 32. Further, the punch holder 12 can be moved up and down by an index cylinder 33, and by moving the punch holder 12 up and down by the index cylinder 33, the first punch 13, the second punch 14, and the third punch 15 are moved. The three punches can be automatically replaced. Note that 34 and 35 indicate limit switches for stopping the punch holder 12 at a predetermined position.

The slide mechanism 32 for the punch holder is attached to a slide unit 3, and this slide unit 3 can be slid on the processing apparatus main body 1 in the horizontal direction. The slide unit 3 is
The press cylinder 36 attached to the left end of the processing device main body 1 is configured to slide and drive along the horizontal direction, and one of the punches 13, 14, and 15 located at the tip of the slide unit 3 is press-fitted into the end of the pipe P held by the pipe clamp 2, thereby processing the end of the pipe P into a predetermined shape. Note that 37 and 38 indicate limit switches for detecting the position of the slide unit 3.

In the above configuration, the pipe shaft processing apparatus according to this embodiment performs stepped processing and the like on the pipe shaft as follows. That is, in order to process a pipe shaft with the pipe shaft processing apparatus described above, the second
As shown in the figure, a pipe P, which is a workpiece, is held in a pipe clamp 2 by a pipe supply means (not shown).

This pipe clamp 2 is constructed by placing the pipe P in the recess 6 of the lower fixed clamp member 4 with the upper clamp member 5 moved upward by the vice cylinder 8, and then moving the upper clamp member 5 upward. is moved downward by the vice cylinder 8, and the pipe P is held in a clamped state by the upper and lower clamp members 4.5 as shown in FIG. 5(A).

At this time, the positioning of the pipe P is carried out by attaching the pipe P to a positioning member 40 which is placed in a protruding state at a predetermined timing in front of the pipe clamp 2, as shown in FIG. 5(A).
This is done by hitting the tip of the Note that the positioning member 40 is designed so that it does not move and interfere with the processing after the positioning operation is completed.

Next, the index cylinder 33 provided in the processing device main body 1 is driven to move the punch holder 12, and the first punch 13 is set to come to the processing position. and,
The slide unit 3 attached to the processing device main body 1 so as to be slidable in the horizontal direction is moved horizontally by the press cylinder 36, and the first punch 13 attached to the slide unit 3 is moved as shown in FIG. 5(B). As shown, the receiver of the clamping member 4.5 projects into the section 11.12,
First processing is performed on the end of the pipe P.

At this time, the tip of the first punch 13 is fitted into the receiving portion 11.12 provided at the tip of the clamp member 4.5, as shown in FIG. 5(B). The concentricity between the pipe P held by the pipe P 5 and the first punch 13 is ensured.

By doing so, as shown in FIG. 6, at the end of the pipe P, a narrow diameter portion 41 machined to have a predetermined outer diameter and a tapered portion 42 following the narrow diameter portion 41 are formed.

Thereafter, the index cylinder 33 is driven to move the second punch 14 through the punch holder slide mechanism 32.
to the operating position. Then, the slide unit 3 attached to the processing device main body 1 so as to be slidable in the horizontal direction is moved horizontally by the press cylinder 36, and the second punch 14 attached to the slide unit 3 is moved in the horizontal direction as shown in FIG. ), the clamp member 4.
5 and performs secondary processing on the end of the pipe P.

At this time, similarly to the first punch 13, the tip of the second punch 14 is connected to the receiving part 11.12 provided at the tip of the clamp member 4.5, as shown in FIG. 5(C). The concentricity between the pipe P held by the clamp member 4.5 and the second punch 13 is ensured.

By doing this, as shown in FIG. 7, the end of the pipe P has a narrow diameter section 43 that is smaller in diameter than the narrow diameter section 41 formed by the first punch 13, and a taper that follows this. A portion 44 is formed.

Next, the index cylinder 33 is driven again, and the third punch 1 is inserted through the punch holder slide mechanism 32.
5 to the operating position. Further, as shown in FIG. 5(D), the upper clamp member 5 is moved upward by the vice cylinder 8 to temporarily release the clamped state of the pipe P, and then placed in front of the pipe clamp 2 at a predetermined timing. The positioning member 4o causes the tip of the pipe P to retreat toward the pipe clamp 2 by a minute distance Δl.

However, it is not necessary to always move the tip of the pipe P back toward the pipe clamp 2 by a minute distance Δl, and depending on the machining length, it may not move, or may be just ΔlOmm.

Note that the positioning member 4o is configured so that it does not move and interfere with the processing after the positioning operation is completed.

Then, the slide unit 3, which is attached to the processing device main body 1 so as to be slidable in the horizontal direction, is attached to the press cylinder 3.
6 in the horizontal direction, the third punch 15 attached to the slide unit 3 is plunged into the clamp member 4.5, as shown in FIG. Perform the next processing.

At this time, similarly to the first punch 13, the tip of the third punch 15 is connected to a portion 11.12 of the receiving portion provided at the tip of the clamp member 4.5, as shown in FIG. 5(E). The concentricity of the third punch 13 and the pipe P held by the clamp member 4.5 is ensured.

By doing this, a stepped portion 45 is formed at the end of the pipe P by the edge portion 31 and the tip surface 27a of the third punch 13, as shown in FIG. In addition, prior to the above-mentioned tertiary processing, the tip of the pipe P is cut by a minute distance Δl
Since I made it retreat only to the pipe clamp 2 side,
As shown in Figure 9, a third punch 1 is inserted into the end of the pipe P.
When forming the stepped portion 45 using the edge portion 31 and the tip surface 27a of No. 3, a region can be secured for the tapered portion 44 formed by the secondary processing to escape, and the stepped portion 45 can be formed in a good condition. .

Then, as shown in FIG. 5(F), the upper clamp member 5 of the pipe clamp 2 is moved upward by the vice cylinder 8, and is inserted into the recess 6 of the lower fixed clamp member 4. The placed processed pipe P is taken out by a pipe supply means (not shown), and a new pipe P is placed on the lower clamp member 4 to perform the next processing.

In this way, punch 13.14.1 into pipe clamp 2.
5, the pipe clamp 2
The receiver for positioning the punch 13, 14, and 15 is part 1.
1.12, the end of the pipe P is inserted into the recess 18.24 of the punch 13.14.15.
．． 30, the positioning of the pipe clamp 2 holding the pipe P and the punch 13, 14, 15 is performed by an engaging portion provided on at least one of the pipe holding means and the punch member. Since it is configured, the axis of the pipe P held by the pipe clamp 2,
The axes of the recesses 18, 24, and 30 of the punches 13, 14, 15 can be aligned accurately, and a pipe shaft having stepped portions with high concentricity can be provided.

Also, recess I8.24.30 of punch 13.14.15
Since the shape of the pipe P is determined by the shape of , it is possible to perform machining with high machining accuracy and at a high machining speed.

Experimental Example The present inventor actually prototyped a pipe shaft machining device as shown in Figure 2, and conducted an experiment to confirm whether errors in pipe machining dimensions and concentricity were within predetermined ranges. Ta.

The pipe P was made of SUS 304, the hardness of the pipe P was 300 Vickers hardness, and the wall thickness of the pipe P was 0.4 mm.

In addition, the dimensions of the pipe P before or after processing are as follows:
As shown in Figures (A) and (B), a block 51.51 is placed on a base 50 having a horizontal surface, and a pipe P before or after processing is placed on this block 51.51.
was placed on the pipe P, and the outer diameter and deflection of the pipe P were measured using a micrometer at the position indicated by the arrow.

The results are as shown below.

(Before processing) Outer diameter 7.99±0.03 (6σ) runout
Within 0.11 (6σ) (after machining) Value outer diameter of reduced diameter part 5.99±0.01 (6σ) Runout (local) Within 0.065 (6σ) Runout (center)
Within 0.065 (6σ) Value at center outer diameter 7.99±0.03 (6σ) Runout
Within 0.11 (6σ) As is clear from this result, the value of the reduced diameter part of the pipe P after processing has an outer diameter tolerance of ±0.01 mm, and a coaxial runout value of 0.0
It was found that processing with a diameter of 7 mm or less and high concentricity was possible.

FIGS. 11(A) and 11(B) show another embodiment of the pipe clamp, and the same parts as in the previous embodiment are given the same reference numerals. In this embodiment, two pipes can be connected simultaneously. It is possible to hold a pipe P.

FIGS. 12(A) to 12(E) show other embodiments of the punch, respectively.

The punch shown in FIG. 12(A) is a punch for forming a reduced diameter portion 61 at the end of a pipe P through a tapered portion 60. It is processed into the shape of FIG. 13(A) shows the pipe shaft after processing.

The one shown in FIG. 12(B) has a stepped portion 6 at the end of the pipe P.
A punch for forming the reduced diameter part 63 through 2,
The pipe P is processed into a predetermined shape by, for example, -stage processing. FIG. 13(B) shows the pipe shaft after processing.

The one shown in FIG. 12(C) has a stepped portion 6 at the end of the pipe P.
This is a punch for forming a diameter-reduced portion 65 through 4 and forming the tip 66 of the pipe P into an R shape, and processes the pipe P into a predetermined shape by, for example, a -stage or multiple stages of final processing. It is. FIG. 13(C) shows the pipe shaft after processing. In this way, by forming the tip 66 of the pipe P into an R shape, the pipe shaft can be easily inserted into the hole, and
Damage to the seal member etc. can be prevented.

The punch shown in FIG. 12(D) is a punch for forming a cross-sectional portion 68 at the end of a pipe P through a tapered portion 67, and the punch is used to form a cross-sectional portion 68 at the end of a pipe P, for example, in a -stage or multiple stages. It is processed into a predetermined shape through final processing. FIG. 13(D) shows the pipe shaft after processing. By forming the tip 68 of the pipe P into a cross-sectional shape in this manner, connection with a drive shaft or the like becomes easy.

What is shown in FIG. 12(E) is a reduced diameter part 7 having a cross-sectional shape that is further reduced in diameter via a tapered part 69 at the end of the pipe P.
This is a punch for forming a pipe P into a predetermined shape by, for example, one stage or multiple stages of final processing. FIG. 13(E) shows the pipe shaft after processing. In this way, the tip 68 of the pipe P
By forming it into a cross-sectional shape, connection with a drive shaft or the like becomes easy.

The punch described above is not limited to those disclosed in the embodiments described above, and any punch may be used as long as the pipe shaft is processed in a predetermined manner. The inner surface of the area may be roughened to provide a non-slip finish or the like.

Furthermore, in the embodiment described above, a case has been described in which the positioning of the pipe P held by the pipe clamp 2 is performed by the positioning member 40 which is arranged to protrude in front of the pipe clamp 2 at a predetermined timing. For example, as shown in FIG. 14, processing may be performed using a member 80 that abuts against the rear end of the pipe P held by the pipe clamp 2.

In such a case, the length from the rear end of the pipe P to the stepped portion 45 can be finished with high precision, making it possible to process a pipe shaft that can be used in precision machinery and the like.

〔Effect of the invention〕

This invention has the structure and operation described above, and basically takes advantage of the advantages of the punch press method, and is a pipe shaft having a step or a tapered part at the end, which allows for fast machining speed and low processing speed. It is possible to provide a pipe shaft that can be manufactured with low noise, has high precision and high concentricity, a processing method thereof, and a processing device.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts showing an embodiment of a pipe shaft processing device according to the present invention, FIG. 2 is an external configuration diagram showing an embodiment of the pipe shaft processing device, and FIG. 3 (A) (
B) is a sectional view and front view showing the pipe clamp, FIGS. 4(A), (B), and (C) are partially broken front views showing the first, second, and third punches, and FIG. ) to (F) are sectional views showing the processing steps in an embodiment of the pipe shaft processing method according to the present invention, FIGS. 6 to 8 are sectional views showing the pipe after processing, and FIG. 10(A) and 10(B) are cross-sectional views showing the machining state, and FIG. 11(A
)(B) is a plan view and a front view showing another embodiment of the pipe clamp, and FIGS. 12(A) to (E) are partially broken front views showing other embodiments of the punch, respectively. Figure 13 (A)
12 (A) to (E) are perspective views showing pipe shafts processed using the punches shown in FIGS. 12 (A) to (E), respectively;
FIG. 14 is a sectional view showing another embodiment of the pipe positioning member. [Explanation of symbols] 3...Slide unit 4. 5... Clamp member 11, 2... Receiver is part 13. 14, 5... First, second and third punch patent applicant Fuji Xerox Co., Ltd. agent

Claims (3)

[Claims] (1) By relatively press-fitting the end of the pipe member held by the pipe holding means into the recess of the punch member,
In a pipe shaft formed by forming a processed part of a predetermined shape at the end of a pipe member, the pipe holding means or the punching member is relatively engaged with at least one of the pipe holding means or the punching member to hold the pipe. An engaging portion for positioning the means and the punch member is provided, and when the end of the pipe member held by the pipe holding means is relatively press-fitted into the recess of the punch member, positioning of the pipe holding means and the punch member is provided. A pipe shaft characterized in that a processed part having a predetermined shape is formed at an end of a pipe member by performing the following using an engaging part. (2) A method for processing a pipe shaft in which a processed portion of a predetermined shape is formed at an end of a pipe member by relatively press-fitting the end of the pipe member into a recess of a punch member,
When the end of the pipe member is relatively press-fitted into the recess of the punch member, the engaging portion provided on the pipe holding means or the punch member positions the pipe holding means for holding the pipe member and the punch member. A pipe shaft processing method characterized by performing the following steps. (3) A pipe shaft processing device comprising a pipe holding means for holding a pipe member and a punch member having a recess for processing the end of the pipe member into a predetermined shape, the pipe holding means and the punch member A pipe shaft machining device, characterized in that an engaging portion is provided on at least one of the pipe holding means or the punching member to position the pipe holding means and the punching member by relatively engaging with the pipe holding means or the punching member.