Heavy pipeline cold roll forming die and heavy pipeline cold roll forming equipment

Abstract

The utility model provides a heavy pipeline cold roll forming die and heavy pipeline cold roll forming equipment, and relates to the technical field of cold roll forming equipment, the heavy pipeline cold roll forming die comprises a bending die, an explorator and an elastic stop structure; the extension direction of the explorator is consistent with that of the pipeline, and the explorator is used for the side wall of the pipeline to abut against. The bending die is provided with a clamping structure used for clamping one end of the pipeline, and the bending die is used for rotating relative to the explorator so as to drive the pipeline to be bent together with the explorator. The elastic stopping structure is arranged at the end, away from the clamping structure, of the explorator and used for abutting against the end face, away from the clamping structure, of the pipeline. The cold roll forming die for the heavy pipeline can improve the cold roll forming quality of the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of cold bending forming equipment, and in particular to a cold bending forming die for heavy pipelines and a cold bending forming equipment for heavy pipelines. Background Art

[0002] In the field of cold bending forming equipment, cold bending forming equipment is often used for the forming and manufacturing of heavy pipelines. The cold bending forming equipment can cold bend a straight pipe into a required bent pipe to realize the cold bending forming manufacturing of heavy pipelines. The die is one of the key components of the cold bending forming equipment, and it has an important influence on the cold bending forming quality of the pipeline.

[0003] The current cold bending forming die usually includes a bending die and a follower die. When the bending die and the follower die rotate relative to each other, they can drive the pipeline to bend towards the bending die to realize cold bending. However, it is difficult to strictly control the deformation direction of the pipeline during the bending process. It may have excessive elongation deformation in the axial direction, which is not conducive to the forming control of the pipeline in the bent section, thus affecting the overall cold bending forming quality of the pipeline. Summary of the Utility Model

[0004] The problem solved by the utility model is: how to improve the cold bending forming quality of the pipeline.

[0005] To solve the above problems, the utility model provides a cold bending forming die for heavy pipelines and a cold bending forming equipment for heavy pipelines.

[0006] In a first aspect, the utility model provides a cold bending forming die for heavy pipelines, including a bending die, a follower die and an elastic stop structure; the follower die is consistent with the extension direction of the pipeline and is used for the side wall of the pipeline to abut against; the bending die is provided with a clamping structure for clamping one end of the pipeline, and the bending die is used to rotate relative to the follower die to jointly drive the pipeline to bend with the follower die; the elastic stop structure is arranged at one end of the follower die far away from the clamping structure and is used to abut against the end face of the pipeline far away from the clamping structure.

[0007] Optionally, the elastic stop structure includes a mounting plate, a fixing block and an elastic member. The mounting plate is connected to the follower die. The fixing block is arranged on the mounting plate and is spaced from the follower die along the extension direction of the follower die. The elastic member is arranged on the side of the fixing block close to the follower die, and the elastic member is used to abut against the end face of the pipeline far away from the clamping structure.

[0008] Optionally, a groove extending along its extension direction is formed on the follower die. The cross section of the groove is a semi-circular shape adapted to the cross section shape of the pipeline. The groove wall is used for the side wall of the pipeline to abut against; the elastic member is a spring, and the spring is coaxially arranged with the groove.

[0009] Optionally, a slot is provided on the side of the fixed block close to the profile template; the end of the spring is embedded in the slot.

[0010] Optionally, the profile template has a first connection end face opposite to the groove; the mounting plate has a second connection end face coplanar with the first connection end face; the heavy-duty pipe cold bending forming die further includes a base, and the base is welded to the first connection end face and the second connection end face respectively.

[0011] Optionally, the elastic stop structure further includes a guide block provided on the mounting plate, the guide block is located between the elastic member and the profile template, and a guide hole for the end of the pipe close to the elastic member to pass through is provided thereon.

[0012] Optionally, a mounting groove extending along the extending direction of the profile template is formed on the mounting plate, and a positioning shoulder is provided on the groove wall of the mounting groove; the fixed block and the guide block are provided in the mounting groove and are respectively located on both sides of the positioning shoulder.

[0013] Optionally, the fixed block is welded to the groove wall and the positioning shoulder of the mounting groove respectively; the guide block is welded to the groove wall and the positioning shoulder of the mounting groove respectively.

[0014] Optionally, the bending die is in a wheel shape, a ring groove extending along its circumferential direction is provided on the circumferential wall of the bending die, and the cross section of the ring groove is in a semicircular shape adapted to the cross section of the pipe; the clamping structure includes a first clamping block partially embedded in the ring groove and a second clamping block detachably connected to the first clamping block, and the first clamping block and the second clamping block jointly define a clamping hole for clamping the pipe.

[0015] In a second aspect, the present invention provides a heavy-duty pipe cold bending forming device, including the heavy-duty pipe cold bending forming die as described above.

[0016] The beneficial effects of the heavy-duty pipe cold bending forming die of the present utility model are as follows: A clamping structure is provided on the bending die. The bending die and the clamping structure are arranged on the side where the template abuts against the pipe and near one end of the template. When the pipe is cold bent and formed, one end of the pipe can be clamped by the clamping structure, and most of the side walls of the pipe along its extending direction abut against the template. By using the relative rotation between the template and the bending die, the bending of the pipe towards the circumferential wall surface of the bending die can be controlled, realizing the cold bending forming of the pipe. At the same time, by adding an elastic stop structure, and the elastic stop structure is arranged at one end of the template far from the clamping structure, so that the elastic stop structure can abut against the end face of the pipe far from the clamping structure. In this way, during the cold bending forming process of the pipe, if the pipe tends to have a large axial deformation along the template, the elastic stop structure can stop the pipe and hinder the axial deformation of the pipe, thereby improving the cold bending forming quality of the pipe. Moreover, the elastic stop structure itself has elasticity, and can achieve flexible stopping of the pipe, which is beneficial to reducing damage to the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of the heavy-duty pipe cold bending forming die according to an embodiment of the present utility model;

[0018] Figure 2 FIG. is a sectional view of the heavy-duty pipe cold bending forming die according to an embodiment of the present utility model;

[0019] Figure 3 FIG. is a partial schematic view of the heavy-duty pipe cold bending forming die according to an embodiment of the present utility model.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS:

[0021] 1. Bending die; 11. Ring groove; 2. Template; 21. Groove; 22. First connection end face; 3. Elastic stop structure; 31. Mounting plate; 311. Second connection end face; 312. Mounting groove; 3121. Positioning shoulder; 32. Fixed block; 321. Embedded groove; 33. Elastic member; 331. Spring; 34. Guide block; 341. Guide hole; 4. Clamping structure; 41. First clamping block; 42. Second clamping block; 5. Pipe; 6. Base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is given with reference to the accompanying drawings. Although some embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be construed as limited to the embodiments described herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present utility model. It should be understood that the accompanying drawings and embodiments of the present utility model are only for exemplary purposes and are not used to limit the protection scope of the present utility model.

[0023] In the accompanying drawings, the Z-axis represents the vertical direction, that is, the up-and-down position. The positive direction of the Z-axis represents the upper side, and the negative direction of the Z-axis represents the lower side. The X-axis in the accompanying drawings represents the horizontal direction and is specified as the front-and-back position. The positive direction of the X-axis represents the front side, and the negative direction of the X-axis represents the back side. The Y-axis in the accompanying drawings represents the left-and-right position. The positive direction of the Y-axis represents the left side, and the negative direction of the Y-axis represents the right side. It should be noted that the meanings represented by the foregoing Z-axis, Y-axis, and X-axis are only for the convenience of describing the present invention and simplifying the description, 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. Therefore, it should not be construed as a limitation to the present invention.

[0024] As used herein, the term "comprising" and its variations are open-ended, that is, "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order of the functions performed by these devices, modules or units or their interdependent relationships.

[0025] It should be noted that the modification of "one" and "multiple" mentioned in the present invention is illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The present invention provides a heavy-duty pipe cold bending forming die and a heavy-duty pipe cold bending forming device to improve the cold bending forming quality of the pipe. The following will be described in detail with specific embodiments.

[0027] As shown in Figure 1 , a heavy-duty pipe cold bending forming die provided by an embodiment of the present invention includes a bending die 1, a backing die 2, and an elastic stop structure 3. The backing die 2 is consistent with the extending direction of the pipe 5 and is used for the side wall of the pipe 5 to abut against. The bending die 1 is provided with a clamping structure 4 for clamping one end of the pipe 5. The bending die 1 is used to rotate relative to the backing die 2 to jointly drive the pipe 5 to bend with the backing die 2. The elastic stop structure 3 is arranged at one end of the backing die 2 away from the clamping structure 4 and is used to abut against the end face of the pipe 5 away from the clamping structure 4.

[0028] It can be understood that the bending die 1 is generally wheel-shaped, and its outer peripheral surface is used to fit against the outer peripheral wall of the pipeline 5. The clamping structure 4 can hold one end of the pipeline 5 so that one end of the pipeline 5 is relatively fixed with the bending die 1. The profiling die 2 is in the same direction as the extension direction of the pipeline 5. Except for the section of the pipeline 5 clamped by the clamping structure 4, the rest of the pipeline 5 can be in contact with the profiling die 2. The bending die 1 can be connected to the main shaft of the heavy-duty pipeline cold bending forming equipment, and the profiling die 2 can be connected to the machine base of the heavy-duty pipeline cold bending forming equipment. The main shaft can drive the bending die 1 to rotate around its own axis, so that the bending die 1 rotates relative to the profiling die 2, thereby causing the pipeline 5 to bend along the outer peripheral surface of the bending die 1, realizing the cold bending forming of the pipeline 5. During the bending deformation process of the pipeline 5, a large deformation elongation may occur in its axial direction, which affects the overall cold bending forming quality of the pipeline 5. The pipeline 5 mainly extends and elongates from the end fixed by the clamping structure 4 to the other end. In this embodiment, an elastic stop structure 3 is added at the other end of the pipeline to abut against the end surface of the other end of the pipeline 5, so as to play a certain stop role when the pipeline 5 is about to produce a large axial deformation, hinder the axial deformation of the pipeline 5, and thus improve the overall cold bending forming quality of the pipeline 5.

[0029] In this embodiment, a clamping structure 4 is provided on the bending die 1. The bending die 1 and the clamping structure 4 are arranged on the side where the profiling die 2 abuts against the pipeline 5 and close to one end of the profiling die 2, so that when the pipeline 5 is cold bent and formed, one end of the pipeline 5 can be clamped by the clamping structure 4, and most of the side walls of the pipeline 5 along its extension direction abut against the profiling die 2. By using the relative rotation between the profiling die 2 and the bending die 1, the bending of the pipeline 5 towards the peripheral wall surface of the bending die 1 can be controlled, realizing the cold bending forming of the pipeline 5. At the same time, by adding an elastic stop structure 3, and the elastic stop structure 3 is arranged at one end of the profiling die 2 far from the clamping structure 4, so that the elastic stop structure 3 can abut against the end surface of the pipeline 5 far from the clamping structure 4. In this way, during the cold bending forming process of the pipeline 5, if the pipeline 5 is about to produce a large axial deformation along the profiling die 2, the elastic stop structure 3 can stop the pipeline 5 and hinder the axial deformation of the pipeline 5, thereby improving the cold bending forming quality of the pipeline 5. Moreover, the elastic stop structure 3 itself has elasticity, and can realize the flexible stop of the pipeline 5, which is beneficial to reducing the damage to the pipeline 5.

[0030] Optionally, as Figure 1 and Figure 2 shown, the elastic stop structure 3 includes a mounting plate 31, a fixing block 32 and an elastic member 33. The mounting plate 31 is connected to the profiling die 2. The fixing block 32 is arranged on the mounting plate 31 and is spaced from the profiling die 2 along the extension direction of the profiling die 2. The elastic member 33 is arranged on the side of the fixing block 32 close to the profiling die 2, and the elastic member 33 is used to abut against the end surface of the pipeline 5 far from the clamping structure 4.

[0031] It should be noted that the specific implementation of the elastic member 33 in this embodiment is not limited. For example, it can be a spring 331 or an elastic sheet.

[0032] In this alternative embodiment, the elastic stop structure 3 is set as the mounting plate 31, the fixing block 32 and the elastic member 33. Among them, the mounting plate 31 is connected to the template 2 to achieve mutual fixation with the template 2; the fixing block 32 is arranged on the mounting plate 31, and the elastic member 33 is arranged on the fixing block 32. The elastic member 33 is mutually fixed to the mounting plate 31 through the fixing block 32. Thus, the elastic member 33 is relatively fixed with respect to the template 2. When the pipeline 5 axially elongates, it can drive the elastic member 33 to compress towards the fixing block 32, realizing elastic stop for the pipeline 5, and further reducing the axial deformation of the pipeline 5.

[0033] Optionally, as Figure 1 and Figure 2 shown, a groove 21 extending along the extending direction of the template 2 is formed on the template 2. The cross-section of the groove 21 is a semi-circular shape adapted to the cross-sectional shape of the pipeline 5, and the groove wall of the groove 21 is used for the side wall of the pipeline 5 to abut against; the elastic member 33 is a spring 331, and the spring 331 is coaxially arranged with the groove 21.

[0034] It should be noted that the cross-section of the groove 21 is semi-circular, and its axis is the axis of the circle where the cross-section is located.

[0035] In this alternative embodiment, by setting the elastic member 33 as the spring 331 and the spring 331 being coaxial with the groove 21 of the template 2, in this way, when the pipeline 5 abuts against the groove 21, its axis also exactly coincides with the axis of the spring 331. The coaxial arrangement of the spring 331 and the pipeline 5 can better stop the pipeline 5, avoid skewing during expansion and contraction, and improve the elastic stop effect.

[0036] Optionally, as Figure 2 and Figure 3 shown, an embedding groove 321 is provided on the side surface of the fixing block 32 close to the template 2; the end of the spring 331 is embedded in the embedding groove 321.

[0037] In this alternative embodiment, by embedding one end of the spring 331 in the embedding groove 321 of the fixing block 32, the connection stability between the spring 331 and the fixing block 32 can be improved, and the spring 331 can be prevented from loosening from the fixing block 32.

[0038] Optionally, as Figure 2 shown, the template 2 has a first connection end face 22 opposite to the groove 21; the mounting plate 31 has a second connection end face 311 coplanar with the first connection end face 22; the heavy-duty pipeline cold bending forming die further includes a base 6, and the base 6 is welded to the first connection end face 22 and the second connection end face 311 respectively.

[0039] It should be noted that the mounting plate 31 may be provided with a mounting groove 312, and the groove wall of the mounting groove 312 is provided with a positioning shoulder 3121. The mounting plate 31 can be welded to the end face of the template 2. In this way, when the mounting plate 31 is welded to the end face of the template 2, the positioning shoulder 3121 and the template 2 can be used to clamp the guide block 34 at the same time, improving the mounting stability of the guide block 34 on the mounting plate 31. Specifically, the base 6 can be connected to the base of the heavy-duty pipe cold bending forming equipment to indirectly connect the template 2 and the elastic stop structure 3 to the base. Preferably, the heavy-duty pipe cold bending forming die may further include a pushing mechanism such as a hydraulic cylinder. The pushing mechanism is fixed to the base of the heavy-duty pipe cold bending forming equipment, and the base 6 is connected to the output end of the pushing mechanism. The base 6 is connected to the base through the pushing mechanism. The pushing mechanism is used to push the base 6 to move axially along the pipe 5, thereby driving the template 2 and the elastic stop structure 3 to move, so that the spring 331 remains in contact with the end face of the pipe 5 away from the clamping structure 4 during the cold bending forming process of the pipe 5.

[0040] In this alternative embodiment, by providing the base 6, and the base 6 is welded to the first connection end face 22 and the second connection end face 311 respectively, the mutual fixation of the base 6, the template 2 and the elastic stop structure 3 is achieved, improving the connection stability between the mounting plate 31 and the template 2.

[0041] Optionally, as Figure 1 and Figure 3 shown, the elastic stop structure 3 further includes a guide block 34 provided on the mounting plate 31. The guide block 34 is located between the elastic member 33 and the template 2, and is provided with a guide hole 341 for the end of the pipe 5 close to the elastic member 33 to pass through.

[0042] In this alternative embodiment, the elastic stop structure 3 further includes a guide block 34, and the guide block 34 is provided with a guide hole 341. The guide hole 341 can be penetrated by the pipe 5 to provide a guiding effect on the pipe 5, ensuring that the pipe 5 abuts well against the elastic member 33 and improving the elastic stop effect.

[0043] Optionally, as Figure 3 shown, the mounting plate 31 is formed with a mounting groove 312 extending along the extending direction of the template 2. The groove wall of the mounting groove 312 is provided with a positioning shoulder 3121; the fixing block 32 and the guide block 34 are arranged in the mounting groove 312 and are respectively located on both sides of the positioning shoulder 3121.

[0044] In this alternative embodiment, a positioning shoulder 3121 is provided on the groove wall of the installation groove 312 of the mounting plate 31, and the fixing block 32 and the guiding block 34 are respectively located on both sides of the positioning shoulder 3121. In this way, during the process of installing the fixing block 32 and the guiding block 34 into the installation groove 312, the positioning shoulder 3121 can be used to position the two, improving the installation efficiency.

[0045] Optionally, as Figure 3 shown, the fixing block 32 is welded to the groove wall of the installation groove 312 and the positioning shoulder 3121 respectively; the guiding block 34 is welded to the groove wall of the installation groove 312 and the positioning shoulder 3121 respectively.

[0046] In this alternative embodiment, by welding the fixing block 32 to the groove wall of the installation groove 312 and the positioning shoulder 3121 respectively, multi-sided welding of the fixing block 32 is realized, making the installation of the fixing block 32 on the mounting plate 31 more reliable; by welding the guiding block 34 to the groove wall of the installation groove 312 and the positioning shoulder 3121 respectively, multi-sided welding of the guiding block 34 is realized, making the installation of the guiding block 34 on the mounting plate 31 more reliable.

[0047] Optionally, as Figure 1 shown, the bending die 1 is in a wheel shape, a ring groove 11 extending along its circumferential direction is provided on the circumferential wall of the bending die 1, and the cross section of the ring groove 11 is a semi-circular shape adapted to the cross section of the pipeline 5; the clamping structure 4 includes a first clamping block 41 partially embedded in the ring groove 11 and a second clamping block 42 detachably connected to the first clamping block 41, and the first clamping block 41 and the second clamping block 42 jointly define a clamping hole for clamping the pipeline 5.

[0048] Specifically, the first clamping block 41 is detachably connected to the bending die 1, so as to realize the detachable connection of the entire clamping structure 4 and the bending die 1. When the first clamping block 41 or the second clamping block 42 is worn, the clamping structure 4 can be removed and replaced in time to avoid the excessive wear of the clamping structure 4 affecting the clamping effect on the pipeline 5.

[0049] In this alternative embodiment, the clamping structure 4 can be used to clamp the pipeline 5 on the bending die 1, and the ring groove 11 on the circumferential wall of the bending die 1 can limit the deformation of the pipeline 5 to realize the cold bending deformation of the pipeline 5.

[0050] A heavy-duty pipeline cold bending forming device provided by an embodiment of the present invention includes the above-mentioned heavy-duty pipeline cold bending forming die.

[0051] In this embodiment, since the heavy-duty pipeline cold bending forming device adopts the above-mentioned heavy-duty pipeline cold bending forming die, it has the technical effects brought by the heavy-duty pipeline cold bending forming die of all the above embodiments, which will not be elaborated here one by one.

[0052] Although the present utility model is disclosed as above, the protection scope of the present utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A heavy-duty pipe cold-bending forming die, characterized in that: The invention comprises a bending die (1), a support die (2) and an elastic stop structure (3); the support die (2) is in the same extension direction as the pipeline (5) and is used for abutting against the side wall of the pipeline (5); the bending die (1) is provided with a clamping structure (4) for clamping one end of the pipeline (5); the bending die (1) is used to rotate relative to the support die (2) so as to drive the pipeline (5) to bend together with the support die (2); the elastic stop structure (3) is provided at one end of the support die (2) away from the clamping structure (4) and is used for abutting against the end face of the pipeline (5) away from the clamping structure (4).

2. The heavy-duty pipe cold-bending forming die according to claim 1, characterized in that: The elastic stop structure (3) comprises a mounting plate (31), a fixing block (32) and an elastic member (33); the mounting plate (31) is connected to the backing form (2); the fixing block (32) is arranged on the mounting plate (31) and is spaced apart from the backing form (2) along the extension direction of the backing form (2); the elastic member (33) is arranged on a side of the fixing block (32) close to the backing form (2); and the elastic member (33) is used to abut against an end face of the pipe (5) away from the clamping structure (4).

3. The heavy-duty pipe cold-bending forming die according to claim 2, characterized in that: The support mold (2) is formed with a groove (21) extending along its extension direction, the cross section of the groove (21) is semicircular and matches the cross section of the pipe (5), and the groove wall of the groove (21) is used for the side wall of the pipe (5) to abut against; the elastic member (33) is a spring (331), and the spring (331) is coaxially arranged with the groove (21).

4. The heavy-duty pipe cold-bending forming die according to claim 3, characterized in that: A side surface of the fixing block (32) close to the supporting mold (2) is provided with an embedding groove (321); an end portion of the spring (331) is embedded in the embedding groove (321).

5. The heavy-duty pipe cold-bending forming die according to claim 3, characterized in that: The support mold (2) has a first connection end face (22) opposite to the groove (21); the mounting plate (31) has a second connection end face (311) coplanar with the first connection end face (22); the heavy-duty pipe cold-bending forming mold also includes a base (6), and the base (6) is respectively welded to the first connection end face (22) and the second connection end face (311).

6. The heavy-duty pipe cold-bending forming die according to claim 2, characterized in that: The elastic stop structure (3) further comprises a guide block (34) arranged on the mounting plate (31); the guide block (34) is located between the elastic member (33) and the backing mold (2), and is provided with a guide hole (341) for allowing one end of the pipe (5) close to the elastic member (33) to pass through.

7. The heavy-duty pipe cold-bending forming die according to claim 6, characterized in that: The mounting plate (31) is formed with a mounting groove (312) extending along the extension direction of the support mold (2), and the groove wall of the mounting groove (312) is provided with a positioning boss (3121); the fixing block (32) and the guide block (34) are arranged in the mounting groove (312) and are respectively located on both sides of the positioning boss (3121).

8. The heavy-duty pipe cold-bending forming die according to claim 7, characterized in that: The fixing block (32) is respectively welded to the groove wall of the installation groove (312) and the positioning boss (3121); and the guiding block (34) is respectively welded to the groove wall of the installation groove (312) and the positioning boss (3121).

9. The heavy-duty pipe cold-bending forming die according to claim 1, characterized in that: The bending die (1) is wheel-shaped, and the peripheral wall of the bending die (1) is provided with an annular groove (11) extending along its circumference, and the cross-section of the annular groove (11) is semicircular and adapted to the cross-sectional shape of the pipe (5); the clamping structure (4) comprises a first clamping block (41) partially embedded in the annular groove (11) and a second clamping block (42) detachably connected to the first clamping block (41), and the first clamping block (41) and the second clamping block (42) jointly define a clamping hole for clamping the pipe (5).

10. A heavy-duty pipe cold-bending forming equipment, characterized in that: It comprises the heavy-duty pipe cold-bending forming die as claimed in any one of claims 1 to 9.

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