Pipe processing device

Abstract

To provide a pipe processing device capable of properly eliminating deterioration in pipe takeoff workability resulting from pressure contact of a part of a pipe to a lower side clamper part of a clamp device.SOLUTION: In a pipe processing device A, a partial area including a first pressure contact part 61a in pressure-contact with a first portion 11a of a pipe P of a lower side clamper part 6 of a clamp device C is made to be a first movable clamper part 61 different from another area 63 of the lower side clamper part 6. The device comprises first deviation means 8A capable of displacing the first movable clamper part 61 in a prescribed first direction D1.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a pipe processing apparatus, and more particularly to a pipe processing apparatus used for performing processing such as pipe expansion or pipe contraction on the end portion of a pipe.

Background Art

[0002] The applicant has previously proposed, as specific examples of pipe processing apparatuses, those described in Patent Documents 1 and 2. The pipe processing apparatuses described in these documents include a clamping device having an upper clamper portion and a lower clamper portion for clamping and fixing a pipe to be processed, and a processing portion that performs processing on the end portion of the pipe using a processing tool in a state where the pipe is clamped. In this processing portion, a processing tool such as a punch for pipe expansion or flange formation approaches and abuts against the end portion of the pipe from its side.

[0003] In the pipe processing apparatus as described above, the upper clamper portion and the lower clamper portion of the clamping device are often used not only to simply sandwich the pipe but also as a die that pairs with the processing tool. In such a case, due to the pressure when the end portion of the pipe is processed by the processing tool, a part of the pipe may be in pressure contact with the upper clamper portion or the lower clamper portion. For example, when forming an annular convex portion that bulges radially outward on the outer peripheral wall of the pipe, in the upper clamper portion or the lower clamper portion, the portion corresponding to the annular convex portion may be in pressure contact with the annular convex portion with a considerably strong force in the axial length direction of the pipe.

[0004] When the above-described phenomenon occurs, for example, after the processing of the pipe is completed and the upper clamper portion of the clamping device is lifted and retracted above the pipe, when removing the pipe from the lower clamper portion, there is a risk that the pipe cannot be easily removed with a light force. Such a risk not only deteriorates the workability of removing the processed pipe but also delays the operation of setting the next new pipe in the clamping device, becoming a factor that reduces the processing efficiency of the pipe. Therefore, it is desirable to appropriately eliminate such a situation.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been conceived under the above circumstances, and an object of the present invention is to provide a pipe processing apparatus capable of appropriately eliminating the deterioration of the workability of removing the pipe caused by the partial pressure contact of the pipe with the lower clamper portion of the clamping device.

Means for Solving the Problems

[0007] To solve the above problems, the present invention takes the following technical means.

[0008] The pipe processing apparatus provided by the present invention has a lower clamper portion on which a pipe is placed and an upper clamper portion that is located above the lower clamper portion and can move up and down, and the end portion of the pipe can be clamped between the lower clamper portion and the upper clamper portion. A pipe processing apparatus includes a clamping device and a pipe processing unit. In a state where the end portion of the pipe is clamped by the clamping device, a processing tool is brought into contact with the end portion of the pipe to process the end portion into a predetermined shape. The lower clamping portion is provided with a first pressing portion that presses against a first portion of the pipe during processing of the pipe and receives a force in a first direction from the outer side to the inner side in the axial length direction of the pipe. A part of the lower clamping portion including the first pressing portion is configured as a first movable clamping portion separate from other regions of the lower clamping portion. After the processing of the pipe is completed, the pipe processing apparatus further includes first displacement means capable of displacing the first movable clamping portion in the first direction.

[0009] According to such a configuration, the following effects can be obtained. That is, when the end portion of the pipe is processed into a predetermined shape using a processing tool while the pipe is clamped by the clamping device, the first pressing portion of the lower clamping portion presses against the first portion of the pipe and receives a force in a first direction from the outer side to the inner side in the axial length direction of the pipe. However, after the processing of the pipe is completed, the first movable clamping portion including the first pressing portion can be displaced in the first direction using the first displacement means. By the displacement of the first movable clamping portion, the pressing state between the first pressing portion and the first portion can be eliminated. As a result, it is possible to avoid the pipe being difficult to remove from the lower clamping portion due to the pressing force, and the pipe can be easily removed from the lower clamping portion with a light force. Such an effect is preferable for speeding up the operation of setting the next new pipe in the clamping device and improving the working efficiency when sequentially processing a plurality of pipes.

[0010] In the present invention, preferably, the first displacement means includes a first elastic member that constantly elastically biases the first movable clamp portion in the first direction, and when processing the pipe, the first movable clamp portion is displaced in a second direction opposite to the first direction against the elastic biasing force of the first elastic member so as to be positioned at a location where the first pressure contact portion comes into pressure contact with the first portion. The present invention further includes an operating means for the first movable clamp portion.

[0011] According to such a configuration, for the first displacement means, a simple configuration using the first elastic member can be achieved. On the other hand, during pipe processing, the operation for arranging the first movable clamp portion at its original predetermined position can be appropriately executed by the operating means for the first movable clamp portion without being hindered by the elastic biasing force of the first elastic member.

[0012] In the present invention, preferably, the operating means for the first movable clamp portion includes a pushing portion that can move up and down along with the upper clamp portion, and when the pipe is clamped by the clamping device, the pushing portion moves down along with the upper clamp portion and comes into contact with the first movable clamp portion, and is configured to push the first movable clamp portion in the second direction.

[0013] According to such a configuration, for the pushing portion constituting the operating means for the first movable clamp portion, it only needs to be provided so as to be able to move up and down along with the upper clamp portion, and it is possible to eliminate the need to use a dedicated drive source for operating the pushing portion.

[0014] In the present invention, preferably, the lower clamp portion is provided with a second pressure contact portion that comes into pressure contact with a second portion of the pipe located on the tip side of the pipe relative to the first portion during pipe processing and receives a force in a second direction opposite to the first direction from this second portion. A part of the region of the lower clamp portion including the second pressure contact portion is a second part separate from the other region of the lower clamp portion and the first movable clamp portion. It is configured as a movable clamp portion, and further includes second displacement means capable of displacing the second movable clamp portion in the second direction after the processing of the pipe is completed.

[0015] According to such a configuration, the following effects can be obtained. That is, when processing the end of the pipe, the second pressure contact portion of the lower clamp portion presses against the second portion of the pipe, and the first and second portions of the pipe are in a state of being sandwiched between the first and second pressure contact portions of the lower clamp portion. On the other hand, after the processing of the pipe is completed, the second movable clamp portion including the second pressure contact portion can be displaced in a direction in which the pressure contact with the second portion of the pipe is released. Also, as described above, the first movable clamp portion including the first pressure contact portion can be displaced in a direction in which the pressure contact with the first portion of the pipe is released. Therefore, the state in which the first and second pressure contact portions of the lower clamp portion sandwich the first and second portions of the pipe can be smoothly released, and the workability of taking out the pipe can be further improved.

[0016] In the present invention, preferably, the second displacement means includes a second elastic member that constantly elastically biases the second movable clamp portion in the second direction.

[0017] According to such a configuration, the second displacement means can have a simple configuration.

[0018] In the present invention, preferably, there are a plurality of pipes as the pipe, the clamping device can clamp the plurality of pipes, the pipe processing portion includes a plurality of pipe processing portions, and by these plurality of pipe processing portions, it is possible to perform processing for gradually changing the shape of the ends of the plurality of pipes, and the first movable clamp portion is provided corresponding to at least one of the plurality of pipe processing portions.

[0019] According to such a configuration, it is possible to efficiently execute processing the ends of a plurality of pipes into a relatively complex shape.

[0020] Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

Brief Description of the Drawings

[0021]

Figure 1

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Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0022] Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

[0023] The pipe processing apparatus A shown in Fig. 1 is used to manufacture a joint pipe P8 (P) as shown in Fig. 13. To facilitate understanding of the configuration of the pipe processing apparatus A, prior to the description of the pipe processing apparatus A, the configuration of the joint pipe P8 will be described.

[0024] The joint pipe P8 is provided with joint portions 1 at both ends thereof. This joint portion 1 includes a flat bent flange portion 10 located at the tip of the end of the joint pipe P8, and an annular convex portion 11 located on the inner side (near the center in the axial length direction) of the joint pipe P8 relative to this flange portion 10. An O-ring 19 for sealing can be attached to the annular concave portion 14 between these. If both ends of this joint pipe P8 are inserted into, for example, two pipe members, these two pipe members are pipe-connected using the joint pipe P8. In this case, sealing using the O-ring 19 is achieved at the connection points between the two pipe members and the joint pipe P8.

[0025] Figs. 14(a) to (i) show examples of the stepwise shape changes of the pipe P until the joint pipe P8 (P) is manufactured through pipes P1 to P7 (P) from a cylindrical pipe P0 (P) made of metal as the raw material pipe.

[0026] In pipes P1 to P3, an enlarged pipe section 12 having a stepped portion 11a at one end is formed. As the pipes progress from P1 to P3, the stepped portion 11a has a more angular cross-sectional shape. In pipes P4 to P6, a pipe shrinking process is performed on a part of the enlarged pipe section 12, and an annular convex portion 11 is formed, and a process of sequentially finishing the formed annular convex portion 11 into a more angular shape is carried out (the finishing process of the annular convex portion 11 is also carried out in pipes P7 and P8). In pipe P7, a slight pipe enlargement process is performed in the region near the tip, and in pipe P8, the portion where this pipe enlargement process is performed is formed as a flange portion 10. Note that in pipes P7 and P8 as well, a process of finishing the annular convex portion 11 into a more angular shape is executed. In the pipe processing apparatus A, processing for stepwise forming pipes P1 to P8 is performed.

[0027] Next, the configuration of the pipe processing apparatus A will be described.

[0028] As well represented in FIGS. 2 and 3, the pipe processing apparatus A includes a lower base 2 and an upper frame 3 positioned above it. The upper frame 3 is vertically movable using a drive source such as a motor or a reciprocating cylinder (not shown). The vertical movement of the upper frame 3 is guided using a plurality of columnar guides 20 provided upright on the lower base 2.

[0029] The pipe processing apparatus A includes a clamping device C capable of clamping a plurality of pipes P, and a plurality of pipe processing units S (S1 to S8) capable of processing the ends (both ends) of a plurality of pipes P using a plurality of processing tools 4, and a transfer device 5 for transferring a plurality of pipes P along a predetermined path.

[0030] The clamping device C includes a plurality of lower clamping parts 6 provided on the lower base 2 and a plurality of upper clamping parts 7 attached to the upper frame 3 and vertically movable above the lower clamping parts 6. As shown in FIG. 1, the plurality of lower clamp portions 6 are provided in two horizontal rows L and R spaced apart from each other. In the present embodiment, each of the rows L and R of the lower clamp portions 6 is configured to include three lower clamp portions 6, but the present invention is not limited thereto. The entire lower clamp portion 6 may be integrated into one lower clamp portion 6, or the lower clamp portion 6 may be made smaller than in the present embodiment to provide a configuration with more lower clamp portions 6. On the upper surface portion of each lower clamp portion 6, a plurality of recesses 60 having an upward opening that is substantially semi-circular in side view for fitting the end portion of the pipe P are provided (see also FIG. 4). The pipe P has its both end portions respectively fitted into the recesses 60 and is placed and supported on the lower clamp portions 6 in a state of being bridged between the two rows L and R of the lower clamp portions 6.

[0031] The plurality of upper clamp portions 7 are provided in an arrangement corresponding to the plurality of lower clamp portions 6. On the lower surface portion thereof, recesses 70 having a downward opening that is substantially semi-circular in side view and facing the recesses 60 of the lower clamp portions 6 are provided. The recess 70 is a portion for fitting the upper half of the end portion of the pipe P when the upper clamp portion 7 descends and clamps the end portion of the pipe P between the upper clamp portion 7 and the lower clamp portion 6. The upper clamp portion 7 and the lower clamp portion 6 also serve as dies paired with the processing tool 4 when processing the end portion of the pipe P, and concave stepped portions 60a, 70a, etc. as described later are appropriately formed at the locations where the recesses 60, 70 are formed. The lower clamp portion 6 is also provided with first and second movable clamp portions 61, 62, which will be described later, as means for improving the removability of the pipe P after the processing of the pipe P is completed.

[0032] As shown in FIG. 5, the transfer device 5 has a plurality of support portions 50 for supporting a plurality of pipes P, which are capable of lifting and horizontal movement. In normal times, as shown in FIG. 5(a), the plurality of support portions 50 are positioned at a height lower than the plurality of pipes P so as to avoid interference with the plurality of pipes P supported on the lower clamp portion 6. When the processing of the plurality of pipes P is completed, as shown in FIG. 5(b), the plurality of support portions 50 rise to support the plurality of pipes P, and then move horizontally by a predetermined dimension and then descend. As a result, each of the plurality of pipes P is transferred to a location corresponding to the next pipe processing section S. Note that pipe placement portions Sa and Sb are provided on the lower base 2. The pipe P0 newly input from the outside to the pipe placement portion Sa is transferred by the transfer device 5 to a location corresponding to the pipe processing section S1. Also, the joint pipe P8 that has completed processing in the pipe processing section S8 is transferred by the transfer device 5 to the pipe placement portion Sb, and can be taken out from the pipe placement portion Sb to the outside of the pipe processing device A.

[0033] The plurality of pipe processing sections S (S1 to S8) are portions for performing predetermined processing on the ends of the pipes P using processing tools 4 such as punches. In the plurality of pipe processing sections S1 to S8, the pipes P1 to P8 shown in FIGS. 14(b) to (i) are respectively manufactured. Also, in each of the pipe processing sections S1 to S8, the specific configurations of the processing tools 4 used are different. However, the details of these points will be described later.

[0034] The plurality of processing tools 4 are reciprocally movable horizontally facing both ends of the plurality of pipes P, and are configured to approach and contact both ends of the plurality of pipes P from both the left and right sides. It is formed. In the present embodiment, as means for making a plurality of processing tools 4 reciprocable, a cam mechanism combining a lifting cam 36 shown in FIGS. 2 and 3 and a slider 26 to which the processing tool 4 is attached is adopted. The lifting cam 36 and the slider 26 are provided with inclined surfaces 36a and 26a. The lifting cam 36 is attached to the upper frame 3. When the upper frame 3 descends, it descends accordingly, and the inclined surfaces 36a and 26a come into contact. Due to the guiding action of these inclined surfaces 36a and 26a, the slider 26 advances toward the pipe P side. The retraction of the processing tool 4 after processing the pipe P is performed using, for example, a retraction cylinder 27 or the like in a state where the lifting cam 36 is raised. It is also possible to retract the slider 26 using a return spring or the like. When the upper frame 3 descends, both the upper clamp portion 7 and the lifting cam 36 descend. At that time, first, the upper clamp portion 7 contacts the end of the pipe P and the pipe P is clamped. Thereafter, the lifting cam 36 descends to a position where it contacts the slider 26, and the slider 26 and the processing tool 4 advance toward the pipe P.

[0035] FIG. 6 shows the configuration of the pipe processing section S1. In this pipe processing section S1, concave stepped portions 70a and 60a are further provided in the concave portions 70 and 60 of the upper clamp portion 7 and the lower clamp portion 6. The processing tool 4 is a punch for pipe expansion. As shown in FIG. (a) of the same figure, in a state where the pipe P0 is placed on the lower clamp portion 6, as shown in FIG. (b) of the same figure, when the upper clamp portion 7 descends and the processing tool 4 is press-fitted into the end of the pipe P, a pipe P1 (P) with an expanded end is manufactured. Detailed descriptions of the pipe processing sections S2 to S3 are omitted, but their basic configurations are the same as that of the pipe processing section S1.

[0036] Figs. 7 to 9 show the configuration of the pipe processing section S6. In this pipe processing section S6, processing is performed to make the annular convex portion 11 of the pipe P5 to be processed into a more angular shape, and the pipe P6 is manufactured. As a means therefor, the processing tool 4 has a punch 40 having an expansion / contraction deformation portion 42 and a cylindrical pressing portion 41. As shown in Fig. 8, when the punch 40 enters the end portion of the pipe P, the outer diameter of the expansion / contraction deformation portion 42 increases, and the annular convex portion 11 of the pipe P is pressed from the inside thereof radially outward of the pipe P. The pressing portion 41 presses the outer side of the annular convex portion 11.

[0037] The lower clamp portion 6 is provided with a first movable clamp portion 61 and a first elastic member 8A. The first movable clamp portion 61 is configured separately from the main body portion 63 of the lower clamp portion 6 (an example of another region of the lower clamp portion referred to in the present invention), and is slidably attached to the main body portion 63 in the axial length direction of the pipe P. This first movable clamp portion 61 includes a first pressure contact portion 61a that comes into pressure contact with a stepped portion 11a on one side of the annular convex portion 11 of the pipe P during processing of the pipe P. The stepped portion 11a corresponds to an example of the "first portion of the pipe" referred to in the present invention. When the expansion / contraction deformation portion 42 expands and presses the annular convex portion 11 radially outward, the first pressure contact portion 61a receives a force Fa in the first direction D1 (a direction from the outer side to the inner side in the axial length direction of the pipe P, which is the same direction as the forward direction of the processing tool 4) from the stepped portion 11a and comes into pressure contact with the stepped portion 11a.

[0038] The first elastic member 8A is, for example, a coil spring, and corresponds to a specific example of the first displacement means referred to in the present invention. This first elastic member 8A constantly elastically biases the first movable clamp portion 61 in the first direction D1. Due to this elastic biasing force, in the normal state, as shown in Fig. 7, a part of the first movable clamp portion 61 protrudes from one side surface of the main body portion 63 of the lower clamp portion 6 by an appropriate dimension La.

[0039] The upper clamp portion 7, during processing of the pipe P, moves the first movable clamp portion 61 in the second direction A pushing portion 78 is provided which is pushed in the direction D2 (opposite to the first direction D1). This pushing portion 78 corresponds to an example of the "operating means for the first movable clamping portion" in the present invention. When the upper clamping portion 7 descends, it descends accordingly and, as shown in FIG. 8, contacts one side surface of the first movable clamping portion 61. As a result, the first movable clamping portion 61 is pushed in the second direction D2 against the elastic biasing force of the first elastic member 8A and is arranged at its original position.

[0040] After the processing in the pipe processing portion S6 is completed and the pipe P6 is manufactured, as shown in FIG. 9, after the processing tool 4 retracts from the pipe P, the upper clamping portion 7 ascends. Then, the first movable clamping portion 61 is displaced in the second direction D2 by the elastic biasing force of the first elastic member 8A, and the pressure contact state between the first pressure contact portion 61a and the stepped portion 11a of the pipe P is released.

[0041] The above-described first movable clamping portion 61 and the related configurations are the same in the pipe processing portions S4 to S8. However, in addition to this, in the pipe processing portions S7 and S8, as described below, a second movable clamping portion 62 and the means attached thereto are further provided.

[0042] FIGS. 10 to 12 show the configuration of the pipe processing portion S8. In this pipe processing portion S8, processing is performed to finish the annular convex portion 11 of the pipe P7 to be processed into a more angular shape and to provide a flange portion 10, whereby the pipe P8 is manufactured. As means therefor, the processing tool 4 includes a punch 40 having a telescopic deformation portion 42 and a cylindrical pressing portion 41 having a concave portion 41a at its tip.

[0043] In addition to the first movable clamping portion 61, the lower clamping portion 6 is further provided with a second movable clamping portion 62 and a second elastic member 8B. The second movable clamp part 62 is a plate-like body separate from the main body part 63 of the lower clamp part 6 and the first movable clamp part 61, and is located between the annular convex part 11 and the flange part 10 of the pipe P, and is a part for forming an annular concave part 14 in the pipe P. Further, the second movable clamp part 62 is attached using a screw member 90 such as a bolt so as to face the outer surface side of the main body part 63, and this attachment is made with a slight play in the horizontal direction with respect to the main body part 63.

[0044] The second movable clamp part 62 includes a second pressure contact part 62a that presses against the step part 11b on the side opposite to the step part 11a of the annular convex part 11 of the pipe P during the processing of the pipe P. The step part 11b corresponds to an example of the "second part of the pipe" in the present invention. When the expansion and contraction deformation part 42 expands and presses the annular convex part 11 outward in the radial direction, the second pressure contact part 62a receives the force Fb in the second direction D2 from the step part 11b and presses against the step part 11b. Also, the first pressure contact part 61a and the step part 11a also press against each other.

[0045] The second elastic member 8B is, like the first elastic member 8A, for example, a coil spring, and corresponds to a specific example of the second displacement means in the present invention. This second elastic member 8B constantly elastically biases the second movable clamp part 62 in the second direction D2.

[0046] During the processing of the pipe P, as shown in FIG. 11, the pressing part 41 of the processing tool 4 presses the second movable clamp part 62 in the first direction D1 and presses it against the main body part 63 of the lower clamp part 6. By this, the second movable clamp part 62 can be arranged at its original position suitable for processing, and it is possible to manufacture the pipe P8 in which the annular convex part 11 and the flange part 10 are appropriately formed.

[0047] Also, during the processing of the pipe P, the step parts 11a and 11b of the annular convex part 11 are in a state of being sandwiched between the first and second pressure contact parts 61a and 62a. On the other hand, for the pipe P After the processing is completed, as shown in FIG. 12, the first and second movable clamp portions 61 and 62 are displaced in a direction away from the stepped portions 11a and 11b by the elastic biasing forces of the first and second elastic members 8A and 8B. As a result, the state in which the stepped portions 11a and 11b of the annular convex portion 11 are sandwiched between the first and second pressure contact portions 61a and 62a is more appropriately eliminated. The above-described first and second movable clamp portions 61 and 62 and the related configurations are the same also in the pipe processing portion S7.

[0048] According to the above-described pipe processing apparatus A, as can be understood from the description with reference to FIGS. 7 to 12, after the processing of both ends of the pipe P is completed, after the upper clamp portion 7 is raised to release the clamped state of the pipe P, the problem that a part of the lower clamp portion 6 remains strongly pressed against a part of the pipe P is appropriately eliminated. Therefore, when the pipe P is transferred using the transfer device 5, a problem such as difficulty in removing the pipe P from the lower clamp portion 6 does not occur, and the pipe P can be smoothly transferred. As a result, the lead time in processing a plurality of pipes P can be shortened, and the productivity of the joint pipe P8 can be increased.

[0049] The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the pipe processing apparatus according to the present invention can be variously designed and changed within the scope intended by the present invention.

[0050] In the above-described embodiment, the pipe processing apparatus A includes a plurality of pipe processing portions S and is configured to perform processing that causes a stepwise shape change on a plurality of pipes P, but the present invention is not limited to this. The pipe processing apparatus according to the present invention can also be configured to include only one pipe processing portion, and instead of processing both ends of the pipe, it can be used for processing one end. The forward movement for approaching the processing tool to the pipe can also be configured to be performed by, for example, a cylinder such as a hydraulic cylinder or a pneumatic cylinder instead of a cam mechanism. The processed shape of the pipe is not limited to the shape of the above-described embodiment. Therefore, the specific type and configuration of the processing tool are also not limited. The shape (round pipe, elliptical pipe, etc.), size (caliber, length, etc.), and material of the pipe to be processed are also not limited. The first part and the second part of the pipe referred to in the present invention are not limited to the steps 11a and 11b of the convex step portion 11 of the pipe P, and can also be other parts of the pipe P. For this reason, the specific shape, attachment method, etc. of the first and second movable clamp portions 61 and 62 referred to in the present invention can also be variously changed.

Explanation of Signs

[0051] A Pipe processing device C Clamping device S (S1~S8) Pipe processing part P (P1~P8) Pipe 11a Step (first part of the pipe) 11b Step (second part of the pipe) 4 Processing tool 6 Lower clamp part 61 First movable clamp part 61a First pressure contact part 62 Second movable clamp part 62a Second pressure contact part 63 Body part (other area of the lower clamp part) 7 Upper clamp part 78 Pushing part (operating means for the first movable clamp part) 8A, 8B First and second elastic members (first and second displacement means)

Claims

1. A clamping device having a lower clamper portion on which a pipe is placed and an upper clamper portion located above the lower clamper portion and capable of moving up and down, and being able to clamp an end portion of the pipe between the lower clamper portion and the upper clamper portion; A pipe processing portion that abuts a processing tool against the end portion of the pipe in a state where the end portion of the pipe is clamped by the clamping device and processes the end portion into a predetermined shape; and comprising: In the lower clamper portion, a first pressure contact portion is provided that presses against a first portion of the pipe during processing of the pipe and receives a force in a first direction from the first portion toward the inner side from the outer side in the axial length direction of the pipe, the pipe processing apparatus. Among the lower clamper portion, a partial region including the first pressure contact portion is configured as a first movable clamper portion separate from other regions of the lower clamper portion. The pipe processing apparatus further comprising first displacement means capable of displacing the first movable clamper portion in the first direction after completion of processing of the pipe.

2. The pipe processing apparatus according to Claim 1, wherein the first displacement means includes a first elastic member that constantly elastically biases the first movable clamper portion in the first direction, and during processing of the pipe, operating means for the first movable clamper portion that displaces the first movable clamper portion in a second direction opposite to the first direction against the elastic biasing force of the first elastic member so that the first pressure contact portion is located at a position where it presses against the first portion.

3. The pipe processing apparatus according to Claim 2, wherein the operating means for the first movable clamper portion includes a pushing portion capable of moving up and down with the upper clamper portion, and when the pipe is clamped by the clamping device, the pushing portion moves down with the upper clamper portion and abuts against the first movable clamper portion, and is configured to push the first movable clamper portion in the second direction.

4. The pipe processing apparatus according to any one of Claims 1 to 3, In the lower clamping part, during the processing of the pipe, a second pressing part is provided which presses against a second part of the pipe located on the tip side of the pipe rather than the first part, and receives a force in a second direction opposite to the first direction from this second part. Among the lower clamping part, a partial region including the second pressing part is configured as a second movable clamping part separate from the other region of the lower clamping part and the first movable clamping part. A pipe processing device further comprising second displacement means capable of displacing the second movable clamping part in the second direction after the processing of the pipe is completed.

5. A pipe processing device according to claim 4, wherein the second displacement means includes a second elastic member that constantly elastically biases the second movable clamping part in the second direction.

6. A pipe processing device according to any one of claims 1 to 5, wherein there are a plurality of pipes as the pipe, the clamping device can clamp the plurality of pipes, as the pipe processing part, a plurality of pipe processing parts are provided, and these plurality of pipe processing parts enable processing to gradually change the shape of the ends of the plurality of pipes. The first movable clamping part is provided corresponding to at least one of the plurality of pipe processing parts.

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