Pressure device for pipe fitting forming

Abstract

The invention relates to the technical field of press machines, and provides a pressure device for pipe fitting forming. The rod piece is movably arranged on the base station; the two ends of the top piece can abut against the inner wall of the pipe fitting after the top piece rotates, and the top piece is used for supporting the pipe fitting from the interior of the pipe fitting. By means of the technical scheme, the technical problems that in the related technology, due to the fact that large errors exist in placement of the pipe fittings, the pressed pipe fittings are difficult to meet the high-standard requirements in the aspects of size precision, shape integrity and the like, the rejection rate is increased, the production efficiency is reduced, and the production cost is improved are solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of presses, and in particular, to a pressure device for forming pipe fittings. Background Art

[0002] For a long time, the handling and placement of pipe fittings have mainly relied on common equipment such as trolleys or cranes. These two traditional methods have large errors in the placement of pipe fittings when placing them into the profiling mold. This error will directly affect the quality of subsequent pipe profiling, making it difficult for the profiling pipe fittings to meet high standards in terms of dimensional accuracy and shape integrity, which not only increases the scrap rate, but also reduces production efficiency and increases production costs. Summary of the invention

[0003] In order to overcome the above-mentioned defects, an embodiment of the present disclosure provides a pressure device for pipe forming, which solves the technical problem in the related art that the placement of pipes has large errors, making it difficult for the pipes after forming to meet high standards in terms of dimensional accuracy and shape integrity, which not only increases the scrap rate, but also reduces production efficiency and increases production costs.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a pressure device for forming a pipe, comprising: a base; A rod, the rod being movably arranged on the base; A top piece is rotatably arranged relative to the rod, and after rotation, both ends of the top piece can abut against the inner wall of the pipe piece, so as to support the pipe piece from the inside of the pipe piece.

[0005] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the ejector includes an upper ejector head and a lower ejector head that are independent of each other, and the upper ejector head and the lower ejector head are both rotatably arranged relative to the rod member.

[0006] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the upper push head is located above the lower push head and has a gap between the upper push head and the lower push head, the push piece also includes two connecting blocks, both of which are rotatably arranged on the rod, the upper push head and the lower push head are movably arranged on the two connecting blocks in a one-to-one correspondence, and the upper push head and the lower push head both move along the radial direction of the rod, and approach or move away from each other after moving.

[0007] For example, in a pressure device for forming a pipe provided by at least one embodiment of the present disclosure, the upper plug has a first inclined surface, and the pressure device for forming a pipe further includes: A push piece is movably arranged on the base, and the push piece has a second inclined surface for slidingly abutting against the first inclined surface. After the push piece moves, it is used to push the upper head to rise.

[0008] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the upper head has a first slide groove and a first sliding portion, the lower head has a second slide groove and a second sliding block, the arrangement directions of the first slide groove and the second slide groove are parallel to the radial direction of the rod, the first sliding portion is slidably arranged in the second slide groove, and the second sliding block is slidably arranged in the first slide groove.

[0009] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the lower mandrel has a receiving groove for receiving the rod, and after the mandrel rotates, the rod enters or moves out of the receiving groove.

[0010] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, it also includes: a first linear driving member, one end of which is rotatably arranged on the base, and the other end of which is rotatably arranged on the lower head, and is used to push and pull the lower head to rotate the top member.

[0011] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the upper head has a slot for the connection block to move, and the connection block has a clamping portion for clamping with the outer end surface of the slot, and the upper head abuts against or cancels the abutment with the clamping portion after movement.

[0012] For example, in at least one embodiment of the present disclosure, a pressure device for pipe forming further includes: a second linear drive member and a third linear drive member, both of which are arranged on the base and are used to drive the rod member and the push member to move respectively.

[0013] For example, in a pressure device for pipe forming provided by at least one embodiment of the present disclosure, the rod has scale lines, the push piece has a scale portion for indicating the scale lines, and the scale portion is movably arranged on the rod.

[0014] The beneficial effects of the embodiments of the present disclosure are: In the present disclosure, the top piece can be an integral or split structure. In this solution, a split structure is preferred to achieve internal support and transportation of pipes of different sizes. The movable and swingable characteristics of the upper top head enable it to flexibly adjust its position and height according to different work requirements. When supporting the pipe fittings, it can cooperate with the lower top head to contact the upper and lower inner walls of the pipe fittings respectively to achieve stable support for the pipe fittings and improve the stability and reliability of the support. The cooperation between the lower top head and the upper top head achieves support for the upper and lower inner walls of the pipe fittings and improves the stability of the support. In the auxiliary processing of the tee, the special design and position of the lower top head can effectively assist the work of the press, improve the efficiency of the tee formation, reduce the cumbersome steps in the pipe processing process, and improve the degree of automation and production efficiency of the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the contents of the exemplary embodiments of the present disclosure and these drawings without creative work.

[0016] Figure 1 This is a schematic structural diagram of a pressure device for pipe forming disclosed in the present invention; Figure 2 It is a schematic diagram of the structure of the base, pipe fittings, etc.; Figure 3 It is a schematic diagram of the base, top piece and other related structures (the top piece is in a vertical state); Figure 4 It is a schematic diagram of the base, top piece and other related structures (the top piece is in an inclined state); Figure 5 It is a structural schematic diagram of the lower head; Figure 6 It is a structural schematic diagram of the upper head.

[0017] In the figure: 1, base; 2, rod; 201, scale line; 3, top member; 301, upper head; 302, lower head; 303, first inclined surface; 304, first slide groove; 305, first slide part; 306, second slide groove; 307, second slider; 308, accommodating groove; 309, slot; 4, pipe fitting; 5, connecting block; 501, clamping part; 6, push member; 601, second inclined surface; 602, scale part; 7, first linear drive member; 8, second linear drive member; 9, third linear drive member; 10, press machine; 1001, processing position. DETAILED DESCRIPTION

[0018] The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0019] In order to simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0020] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0021] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0022] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] like Figure 1 to Figure 6As shown, it shows a pressure device for forming a pipe 4 in one embodiment of the present disclosure, wherein the base 1 provides a platform for installing and placing other structures such as rods 2, and plays a role in transporting the pipe 4. The press 10 is used to process the pipe 4, and has a processing position 1001, in which a mold is placed.

[0025] The top member 3 can be an integral or split structure. In this solution, it is preferably a split structure, which is divided into an upper top head 301 and a lower top head 302. The upper top head 301 is located above the lower top head 302 and there is a gap between the upper top head 301 and the lower top head 302. Through the movable setting relationship with the connecting block 5, it can move along the radial direction of the rod 2. When the first linear driving member 7 drives the lower top head 302 to swing, through the sliding cooperation of the first slide 304 and the second slider 307, the first slide 305 and the second slide 306, the upper top head 301 will swing synchronously, changing its angle and position relative to the rod 2; when the third driving member drives the push member 6 to move, the second inclined surface 601 of the push member 6 slides and contacts with the first inclined surface 303 of the upper top head 301, and the continuous movement of the push member 6 will push the upper top head 301 to rise, increase the overall height of the top member 3, so that it can abut against the upper part of the inner wall of the pipe 4. The movable and swingable characteristics of the upper top head 301 enable it to flexibly adjust its position and height according to different work requirements. When supporting the pipe 4, it can cooperate with the lower mandrel 302 to contact the upper and lower inner walls of the pipe 4 respectively, so as to achieve stable support for the pipe 4 and improve the stability and reliability of the support. In addition, in the process of detecting the change of the inner diameter of the pipe 4, the contact between the inner wall of the pipe 4 and the upper mandrel 301 can be detected by the rise and fall of the upper mandrel 301 and the cooperation with the pressure sensor, so as to indirectly obtain the change of the inner diameter of the pipe 4, which provides an important basis for the quality control of the pipe 4 during the molding process.

[0026] The lower mandrel 302 is located below the upper mandrel 301, and is spaced from the upper mandrel 301. The lower mandrel 302 is also movably arranged on the connecting block 5 and can move along the radial direction of the rod 2. The lower mandrel 302 is driven to swing by the first linear drive member 7. After the swing, the upper mandrel 301 is synchronously driven to swing by cooperating with the slider slot between the upper mandrel 301, so that the whole mandrel 3 rotates relative to the rod 2, and the overall height of the mandrel 3 is changed. In the auxiliary processing of the tee, when the lower mandrel 302 is hemispherical and its diameter is smaller than the diameter of the bottom forming hole, during the process of the press forming the pipe 4, the lower mandrel 302 can act on the pipe wall above the forming hole to assist in pushing the pipe wall downward. The swing function of the lower mandrel 302 enables the mandrel 3 to adapt to pipes 4 with different inner diameters. For pipes 4 with an inner diameter smaller than the initial height of the mandrel 3, the overall height of the mandrel 3 is reduced by swinging so that it can extend into the pipe 4. The cooperation between the lower mandrel 302 and the upper mandrel 301 realizes the support of the upper and lower inner walls of the pipe 4, and improves the support stability. In the tee-assisted processing, the special design and position of the lower plug 302 can effectively assist the press to work, improve the efficiency of tee formation, reduce the cumbersome steps in the processing of the pipe 4, and improve the degree of automation and production efficiency of the processing.

[0027] The connecting block 5 is rotatably arranged on the rod 2, and there are two of them. The upper head 301 and the lower head 302 are movably arranged on the two connecting blocks 5 in a one-to-one correspondence. The connecting block 5 serves to connect the upper head 301, the lower head 302 and the rod 2. On the one hand, it enables the upper head 301 and the lower head 302 to rotate around the rod 2 (by cooperating with the first linear drive member 7 to drive the lower head 302 to swing), and on the other hand, it provides a guide and support structure for the movement of the upper head 301 and the lower head 302 along the radial direction of the rod 2. The setting of the connecting block 5 provides a basis and support for the movement of the upper head 301 and the lower head 302, ensuring the stability and accuracy of the upper head 301 and the lower head 302 when they move along the radial direction of the rod 2 and rotate around the rod 2. By cooperating with the slider and the chute, the upper mandrel 301 and the lower mandrel 302 can move synchronously, so that the mandrel 3 can better adapt to different working scenes and pipe fittings 4 requirements, and improve the collaborative working ability of the entire device and the adaptability to the pipe fittings 4. At the same time, the rotation of the connecting block 5 is set on the rod 2, which also makes it possible to adjust the overall angle of the mandrel 3.

[0028] When supporting the pipe fitting 4, it can cooperate with the lower mandrel 302 and contact the upper and lower inner walls of the pipe fitting 4 respectively, so as to achieve stable support for the pipe fitting 4 and improve the stability and reliability of the support. The cooperation between the lower mandrel 302 and the upper mandrel 301 achieves support for the upper and lower inner walls of the pipe fitting 4 and improves the stability of the support. In the auxiliary processing of the tee, the special design and position of the lower mandrel 302 can effectively assist the work of the press, improve the efficiency of the tee formation, reduce the cumbersome steps in the processing of the pipe fitting 4, and improve the degree of automation and production efficiency of the processing.

[0029] When the push piece 6 moves, the second inclined surface 601 slides and abuts against the first inclined surface 303, and the horizontal movement of the push piece 6 is converted into the vertical rising movement of the upper head 301 through the relative sliding between the inclined surfaces. The push piece 6 is movably arranged on the base 1, and is driven by the third linear drive member 9 to move linearly on the base 1. The movement of the push piece 6 is the power source for realizing the rising of the upper head 301. The inclination angle of the second inclined surface 601 matches the first inclined surface 303. When the push piece 6 moves under the action of the third drive member, the second inclined surface 601 contacts and slides relatively with the first inclined surface 303. Due to the characteristics of the inclined surface, the horizontal movement of the push piece 6 will generate a vertical upward component force, which pushes the upper head 301 to rise along the radial direction of the rod 2, thereby increasing the overall height of the top piece 3.

[0030] When supporting a pipe 4 whose inner diameter is larger than the initial height of the top piece 3, the upper top head 301 is pushed upward by the push piece 6, so that the upper and lower ends of the top piece 3 can be tightly abutted against the upper and lower parts of the inner wall of the pipe 4. Compared with the method of abutting only against the upper part of the inner wall, this all-round abutment greatly improves the stability of the support. During the transportation and processing of the pipe 4, the shaking and displacement of the pipe 4 can be effectively reduced, the position accuracy of the pipe 4 can be ensured, and the quality and accuracy of the forming of the pipe 4 can be improved.

[0031] During the auxiliary processing of the tee, the upper mandrel 301 rises to make the top piece 3 and the inner wall of the pipe 4 tightly contact, and the lower mandrel 302 can act on the pipe wall above the forming hole to assist the press to push the pipe wall downward. The stable support can ensure that the pipe 4 is evenly stressed when the press is working, which helps to improve the efficiency and quality of the tee forming and reduce defects in the forming process.

[0032] By controlling the moving distance of the pusher 6, the rising height of the upper mandrel 301 can be precisely controlled. This enables the device to adapt to pipes 4 with different inner diameters and has strong versatility. Whether it is a pipe 4 with a slightly larger inner diameter or a much larger inner diameter, the pusher 3 can effectively support the pipe 4 by adjusting the moving distance of the pusher 6.

[0033] In the operation of detecting the change in the inner diameter of the pipe fitting 4, the movement of the push piece 6 is used to control the rise and fall of the upper plug 301. By observing the change in the scale line 201 of the scale part 602, the change in the inner diameter of the pipe fitting 4 can be indirectly obtained. By setting multiple sections of the moving distance of the push piece 6 according to the final change range of the inner diameter, the change trend of the inner diameter can also be obtained, which provides an important basis for the quality control of the forming process of the pipe fitting 4.

[0034] The push piece 6 and the upper ejector head 301 are matched by the inclined plane to realize the rise of the upper ejector head 301. This structure is relatively simple, reducing the number of complex transmission mechanisms and parts. The simple structure means a lower failure rate and higher reliability, reducing the maintenance cost and downtime of the equipment, and improving production efficiency. At the same time, the inclined plane transmission has a high transmission efficiency, which can effectively transmit the power of the push piece 6 to the upper ejector head 301, ensuring the working performance of the device.

[0035] The setting of the connecting block 5 provides a basis and support for the movement of the upper and lower heads 301 and 302, ensuring the stability and accuracy of the upper and lower heads 301 and 302 when they move radially along the rod 2 and rotate around the rod 2. The receiving groove 308 provided on the lower head 302 provides space for the rod 2 after the top member 3 rotates.

[0036] This solution can realize the process of processing and forming three pipe fittings 4, including the supporting and transporting process of the pipe fitting 4, the inner diameter change detection process and the auxiliary processing process of the tee of the pipe fitting 4, which are as follows: Support transportation work process: 1. For a pipe 4 whose inner diameter (the inner diameter mainly refers to the length between the upper end of the inner wall of the pipe 4 and the lower end of the inner wall) is smaller than the initial height of the ejector 3 (the initial height of the ejector 3 refers to the case where the upper ejector 301 is not pushed up by the pusher 6, at which time the upper ejector 301 is supported by the clamping portion 501 of the connecting block 5 and is positioned by cooperating with the slider slot of the lower ejector 302): the first linear drive member 7 is started to drive the lower ejector 302 to swing. After the lower ejector 302 swings, the upper ejector 301 is synchronously driven to swing through the sliding cooperation of the first slot 304 and the second slider 307, the first sliding portion 305 and the second slot 306, so that the ejector 3 rotates as a whole relative to the rod 2, and the overall height of the ejector 3 decreases after the rotation, as shown in FIG. Figure 4 As shown, as a preference, the overall height of the top piece 3 after rotation is smaller than the inner diameter of the pipe 4 to be supported, so that the top piece 3 can better extend into the pipe 4, and the second linear drive 8 is started to drive the rod 2 to move, and simultaneously drive the top piece 3 to extend into the pipe 4. After extending, it can be further adjusted by the first linear drive 7, so that the top piece 3 rotates in the opposite direction as a whole, so as to stably support the inside of the pipe 4. At this time, the upper head 301 and the lower head 302 are respectively supported by the upper and lower inner walls of the pipe 4, as shown in FIG. Figure 4 As shown, the stability of the pipe 4 during the process of supporting and driving the pipe 4 to move is improved, so that the pipe 4 can be placed on the processing table more stably, reducing errors and improving accuracy.

[0037] 2. For the inner diameter greater than the initial height of the top piece 3 (the initial height of the top piece 3 has the same meaning as the initial height of the top piece 3 described in), the first linear drive member 7 is started to adjust the overall angle of the lower top head 302 and the upper top head 301, so that the upper top head 301 and the lower top head 302 are in a vertical state, and the second linear drive member 8 is started to make the top piece 3 extend into the pipe 4, and the third drive member is further started to drive the push member 6 to move, so that the second inclined surface 601 and the first inclined surface 303 are in sliding contact, and the push member 6 continues to move to push the upper top head 301 to rise, increasing the overall height of the top piece 3, so that the upper and lower ends of the top piece 3 are in contact with the upper and lower parts of the inner wall of the pipe 4, compared with only abutting against the upper part of the inner wall, the support stability is improved.

[0038] The inner diameter change detection operation (applicable to the pipe 4 whose inner diameter before profiling is larger than the initial height of the ejector 3 and whose inner diameter change range after profiling is smaller than the interval between the upper ejector 301 and the lower ejector 302) occurs after the pipe 4 is placed in the mold. First, the lower ejector head 302 is driven by the first linear drive member 7 to make the ejector head 3 in a vertical state as a whole. The third drive member is further started to drive the push member 6 to move so that the second inclined surface 601 is in sliding contact with the first inclined surface 303. The push member 6 continues to move to push the upper ejector head 301 to increase the overall height of the ejector head 3, so that the upper and lower ends of the ejector head 3 abut against the upper and lower parts of the inner wall of the pipe 4. The position of the scale line 201 corresponding to the scale part 602 at this time is observed and recorded. After recording, the third drive member is moved to make the push member 6 move in the opposite direction. The upper ejector head 301 is moved under the action of gravity. By descending, the moving distance of the push piece 6 can be controlled, and then the descending height of the upper head 301 can be controlled. During the forming process of the pipe fitting 4, the inner diameter gradually changes until the upper end of the inner wall of the pipe fitting 4 abuts against the end of the upper head 301. A pressure sensor can be installed in the upper head 301. Through the feedback of the pressure detection signal, it is known whether the upper end of the inner wall of the pipe fitting 4 abuts against the end of the upper head 301, so that the change of the inner diameter can be indirectly obtained through the moving distance of the scale line 201. In this process, multiple sections of the moving distance of the push piece 6 are set according to the final change range of the inner diameter, so as to obtain the change trend of the inner diameter.

[0039] Auxiliary processing of tees (applicable to the process of processing tees of pipe fittings 4, and forming holes are usually set on the bottom mold): In the prior art, large three-way pipe fittings 4 are usually formed by hot pressing. This method requires the pipe fitting 4 to be extruded multiple times to gradually form it. Each extrusion molding requires a tedious process of conveying, heating and re-molding. The lower head 302 is preferably hemispherical, and its diameter is smaller than the diameter of the bottom forming hole. When the press presses the pipe fitting 4 through the mold, the third driving member is started to drive the pusher 6 to move, so that the second inclined surface 601 is in sliding contact with the first inclined surface 303, and the pusher 6 continues to move, pushing the upper head 301 to rise, increasing the overall height of the top member 3, so that the upper and lower ends of the top member 3 are in contact with the upper and lower parts of the inner wall of the pipe fitting 4, and the lower head 302 is located above the forming hole. During the operation of the press, the lower head 302 can act on the pipe wall above the forming hole, thereby assisting in pushing the pipe wall downward and improving the efficiency of the three-way formation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, which should be included in the scope of the claims of the present disclosure.

Claims

1. A pressure device for forming a pipe, characterized in that: include: A press (10), the press (10) having a processing position (1001) for processing a pipe (4); A base (1), the base (1) being located on one side of the press (10); A rod (2), wherein the rod (2) is movably arranged on the base (1), and after the rod (2) moves, an end portion thereof enters or moves out of the processing position (1001); A top piece (3), the top piece (3) is rotatably arranged relative to the rod (2), and follows the rod (2) to enter or move out of the processing position (1001), and after the top piece (3) rotates, both ends of the top piece (3) can abut against the inner wall of the pipe (4), so as to support the pipe (4) from the inside of the pipe (4).

2. A pressure device for forming a pipe according to claim 1, characterized in that: The top member (3) comprises an upper top head (301) and a lower top head (302) which are independent of each other, and the upper top head (301) and the lower top head (302) are both rotatably arranged relative to the rod member (2).

3. A pressure device for forming a pipe according to claim 2, characterized in that: The upper mandrel (301) is located above the lower mandrel (302) and is spaced apart from the lower mandrel (302); the pressure device for forming a pipe fitting further comprises: The connecting blocks (5) have two parts, both of which are rotatably arranged on the rod (2); the upper head (301) and the lower head (302) are movably arranged on the two connecting blocks (5) in a one-to-one correspondence; the upper head (301) and the lower head (302) both move along the radial direction of the rod (2), and move closer to or farther away from each other after moving.

4. A pressure device for forming a pipe according to claim 3, characterized in that: The upper mandrel (301) has a first inclined surface (303), and the pressure device for forming a pipe fitting further comprises: A push piece (6), wherein the push piece (6) is movably arranged on the base (1), and the push piece (6) has a second inclined surface (601) for slidingly abutting against the first inclined surface (303). After moving, the push piece (6) is configured to be able to push the upper head (301) to rise through the cooperation between the first inclined surface (303) and the second inclined surface (601).

5. A pressure device for forming a pipe according to claim 4, characterized in that: The upper ejector head (301) has a first slide groove (304) and a first sliding portion (305), and the lower ejector head (302) has a second slide groove (306) and a second sliding block (307). The arrangement directions of the first slide groove (304) and the second slide groove (306) are both parallel to the radial direction of the rod (2). The first sliding portion (305) is slidably arranged in the second slide groove (306), and the second sliding block (307) is slidably arranged in the first slide groove (304).

6. A pressure device for forming a pipe according to claim 2, characterized in that: The lower top head (302) has a receiving groove (308) for receiving the rod (2), and the top member is configured so that after the top member (3) rotates, the rod (2) enters or moves out of the receiving groove (308).

7. A pressure device for forming a pipe according to claim 2, characterized in that: Also includes: A first linear driving member (7), one end of which is rotatably disposed on the base (1), and the other end of which is rotatably disposed on the lower top head (302), and is used for pushing and pulling the lower top head (302) to rotate the top member (3).

8. A pressure device for forming a pipe according to claim 5, characterized in that: The upper ejector head (301) has a slot (309) for the connection block (5) to move, and the connection block (5) has a clamping portion (501) for clamping with the outer end surface of the slot (309). After the upper ejector head (301) moves, it is clamped with or cancels the clamping portion (501).

9. A pressure device for forming a pipe according to claim 4, characterized in that: The pressure device for pipe forming also includes: The second linear driving member (8) and the third linear driving member (9) are both arranged on the base (1) and are used to drive the rod member (2) and the push member (6) to move respectively.

10. A pressure device for forming a pipe according to claim 9, characterized in that: The rod (2) has a scale line (201), and the pusher (6) has a scale portion (602) for indicating the scale line (201).

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