A wheel die for a single-head pipe bending machine used for ship ladder processing

Abstract

The present invention provides a wheel die of a single-head pipe bending machine for ship ladder processing, which belongs to the technical field of pipe bending processing equipment, and includes a wheel die main body, a bending groove for bending a pipe is provided on the wheel die main body, the wheel die main body includes an upper die and a lower die symmetrically arranged up and down, and multiple groups of floating material components are distributed along the path of the bending groove, wherein the floating material component includes two floating material blocks symmetrically arranged up and down, and the upper die and the lower die are both provided with slots for installing the floating material blocks, and an elastic support component is provided inside the slot, so that the floating material block can float up and down along the slot. By setting the wheel die main body as an upper die and a lower die that can be split and moved up and down, the bending groove can be separated up and down in the middle position in the height direction after the pipe bending process is completed, so that the metal pipe is not clamped by the bending groove, and accordingly, the extrusion force generated by the deformation of the metal pipe and the bending groove disappears, which can effectively avoid the phenomenon of material jamming.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe bending processing equipment, and specifically refers to a single-head pipe bending machine wheel die for ship ladder processing. Background Art

[0002] The ship ladder is an important part of the hull. Due to the influence of wind and waves, the hull will shake in the water. In order to reduce the risk of collision, the ship ladder is processed with a rounded corner design as much as possible. In particular, when processing the ship ladder handrail, both ends of the handrail are bent with a pipe bender, and the bending angle often reaches 180° (i.e., a U-shaped bend).

[0003] When bending pipes, the commonly used pipe bending machine is a single-head pipe bending machine. When bending pipes, the single-head pipe bending machine uses a suitable mold to bend the metal pipe. The mold includes: a wheel mold, a clamping mold, an anti-wrinkle mold and a slide plate mold. Among them, when bending the pipe, the clamping mold and the slide plate mold clamp the metal pipe. As the wheel mold rotates, the metal pipe bends along the wheel mold. After the bending is completed, the clamping mold and the slide plate mold are opened to take out the metal pipe.

[0004] However, when the metal tube is bent and deformed, a certain extrusion pressure will be generated with the inner wall of the wheel die. When the tube is bent at 180° (i.e. U-shaped bend), the bending distance of the metal tube is longer, which makes it more prone to material jamming. When the metal tube is fed for secondary bending, it is easy to cause poor feeding. When the metal tube is fed, the metal tube and the wheel die will produce sliding friction over a long distance. Long-term processing will cause wear of the wheel die, making it easy for wrinkles and convex ribs to appear on the inner side of the bent metal tube during subsequent bending. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a single-head pipe bending machine wheel mold for ship ladder processing, which at least partially solves the above problems.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a wheel die of a single-head pipe bending machine for ship ladder processing, comprising a wheel die main body, the wheel die main body is provided with a bending groove for bending the pipe, and the wheel die main body comprises an upper die and a lower die arranged symmetrically up and down; There are multiple groups of floating material components distributed along the path of the bending groove, wherein the floating material components include two floating material blocks arranged symmetrically up and down, the upper mold and the lower mold are both provided with slots for installing the floating material blocks, and elastic support components are provided inside the slots so that the floating material blocks can float up and down along the slots, and the floating material blocks are provided with bending surfaces adapted to the bending groove; An oil pumping gap is provided in the floating material block, a plurality of oil seepage holes distributed in an array and connected to the oil pumping gap are provided on the bending surface, and an oil supply component connected to the oil pumping gap and used for supplying oil to the oil pumping gap is provided on the upper mold and the lower mold.

[0007] Furthermore, the elastic support assembly includes an elastic member and a cover plate, the cover plate is fixed to one end of the slot away from the bending groove, one end of the elastic member is fixed to the cover plate, and the other end of the elastic member is connected to the floating block for applying an elastic force to the floating block to slide outward.

[0008] Furthermore, a limiting flange is provided on the floating material block, and a step corresponding to the limiting flange is provided in the slot.

[0009] Furthermore, an insert is inserted into the interior of the floating material block, and the oil pumping gap is formed between the insert and the inner wall of the bending surface.

[0010] Furthermore, an oil delivery hole communicating with the oil pumping gap is formed on the insert, and the oil supply assembly is connected to the oil delivery hole, and oil is supplied into the oil pumping gap through the oil delivery hole.

[0011] Furthermore, a limiting column is fixed on the cover plate, and the limiting column is located between the floating material block and the cover plate.

[0012] Furthermore, the oil supply assembly includes an oil delivery pipe and a connecting hose, the oil delivery pipe is connected with connecting hoses corresponding to the number of the floating material blocks, and the connecting hoses are connected to the oil delivery holes.

[0013] Furthermore, two positioning guide pillars are fixed to one end of the upper mold corresponding to the lower mold, and the lower mold is provided with guide pillar holes corresponding to the positioning guide pillars. When the upper mold and the lower mold are closed, the positioning guide pillars are inserted into the guide pillar holes.

[0014] Furthermore, the upper mold is connected to a driving mechanism for driving the upper mold to rise or fall.

[0015] Furthermore, an axial hole for installing the core shaft is provided at the center position of the lower mold, and a avoidance hole corresponding to the axial hole is provided on the upper mold.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By setting the wheel die body as an upper die and a lower die that can be split and moved up and down, after the tube is bent, the bending groove is separated up and down in the middle position along the height direction, so that the metal tube is not clamped by the bending groove. Correspondingly, the extrusion force generated by the deformation of the metal tube and the bending groove disappears, which can effectively avoid the phenomenon of material jamming; 2. Multiple groups of floating blocks are arranged along the bending groove. When the upper die and the lower die are separated, the floating blocks slide outward and lift the metal tube to separate the metal tube from the bending groove. When the metal tube is fed, the metal tube will not rub against the bending groove. When the wear of the floating blocks does not meet the production requirements, only the floating blocks need to be replaced, and there is no need to replace the entire mold, thereby reducing the use and maintenance costs; 3. An oil pump gap is provided in the float block, and a plurality of oil seepage holes distributed in an array and connected to the oil pump gap are provided on the bending surface. The oil supply assembly supplies oil to the oil pump gap, and the oil seeps out through the oil seepage holes and adheres to the bending surface. When the metal pipe slides and rubs against the bending surface, the friction force can be reduced, thereby reducing the wear of the bending surface of the float block and increasing the service life of the float block. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a wheel die of a single-head pipe bender for ship ladder processing according to an embodiment of the present invention; Figure 2 A schematic diagram of the separation of the upper die and the lower die in the wheel die of the single-head pipe bender for ship ladder processing proposed in an embodiment of the present invention; Figure 3 A schematic diagram of the state of the upper die and the lower die in the wheel die of the single-head pipe bender for ship ladder processing proposed in an embodiment of the present invention being closed; Figure 4 A schematic diagram of a state in which a metal pipe is lifted by a floating material block in a wheel die of a single-head pipe bender for ship ladder processing according to an embodiment of the present invention; Figure 5 A cross-sectional view of a wheel die of a single-head pipe bender for ship ladder processing according to an embodiment of the present invention; Figure 6 This is a structural schematic diagram of a floating material block installed in a slot in a wheel die of a single-head pipe bender for ship ladder processing according to an embodiment of the present invention; Figure 7 A schematic diagram of the internal structure of a floating material block in a wheel die of a single-head pipe bender for ship ladder processing according to an embodiment of the present invention; Figure 8 From top to bottom are schematic diagrams of the metal tube bending 180° and the metal tube feeding state.

[0018] Among them, 10, wheel mold body; 101, bending groove; 102, slot; 103, shaft hole; 104, avoidance hole; 11, upper mold; 12, lower mold; 121, guide post hole; 13, positioning guide post; 20, floating block; 21, elastic part; 22, cover plate; 23, insert; 231, oil delivery hole; 24, limiting flange; 25, limiting post; 201, bending surface; 202, oil pump gap; 203, oil seepage hole; 30, oil delivery pipe; 31, connecting hose; 40, driving mechanism.

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] like Figure 1 As shown, the present invention proposes a wheel die of a single-head pipe bending machine for ship ladder processing, including a wheel die main body 10, on which a bending groove 101 for bending the pipe is provided, the cross-section of the bending groove 101 is semicircular, and the bending groove 101 is provided with an arc segment and a straight segment, the straight segment is tangent to the arc segment, and the straight segment corresponds to the clamping die of the pipe bending machine; through the cooperation of the clamping die and the straight segment of the wheel die, one end of the metal pipe is fixed, the wheel die and the clamping die rotate synchronously, and the metal pipe is bent along the arc segment of the bending groove 101, and according to the processing requirements, the wheel die and the clamping die rotate corresponding angles, so that the metal pipe is bent to a specified angle.

[0023] Combination Figure 2 As shown, the wheel mold body 10 includes an upper mold 11 and a lower mold 12 which are symmetrically arranged and easy to separate, and a bending groove 101 is respectively opened on the upper mold 11 and the lower mold 12. Therefore, when the upper mold 11 and the lower mold 12 are closed, the bending groove 101 forms a groove with a semicircular cross-section.

[0024] Furthermore, the bending groove 101 is separated and arranged on the upper mold 11 and the lower mold 12 at the middle position along the height direction. Therefore, when the upper mold 11 and the lower mold 12 are separated, the bending groove 101 can be separated up and down at the middle position in the height direction.

[0025] Thus, when the tube is bent, the upper die 11 and the lower die 12 are in a fully fitted mold state. At this time, the bending groove 101 forms a groove with a semicircular cross section. When the metal tube is bent, the inner side surface of the metal tube at the bending part can be supported and shaped, so that the inner side surface of the metal tube at the bending part is smooth and wrinkle-free; when the metal tube is bent at 180° (such as Figure 8 After completion, the upper mold 11 is moved upward to separate the upper mold 11 from the lower mold 12 (as shown in FIG. Figure 2 As shown), at this time, the bending groove 101 is separated up and down at the middle position in the height direction, so that the metal tube is not clamped by the bending groove 101. Accordingly, the extrusion force generated by the deformation of the metal tube and the bending groove 101 disappears, which can effectively avoid the phenomenon of material jamming.

[0026] Combination Figure 1 and Figure 2 As shown, multiple groups of floating material assemblies are distributed along the path of the bending groove 101, and the floating material assembly includes two floating material blocks 20 arranged symmetrically up and down. The upper mold 11 and the lower mold 12 are both provided with slots 102 for installing the floating material blocks 20, and the floating material blocks 20 are slidably inserted in the slots 102; The floating material block 20 is provided with a bending surface 201 adapted to the bending groove 101, so when the floating material block 20 slides into the slot 102 until the bending surface 201 is flush with the bending groove 101, the bending surface 201 is adapted to the bending groove 101 (the cross section of the bending surface 201 at any position is the same as the bending groove 101), avoiding the bending groove 101 from being convex or concave at the floating material block 20, and maintaining the smoothness of the bending groove 101; An elastic support assembly is provided inside the slot 102 to apply an elastic support force to the floating block 20 so that the floating block 20 can float up and down along the slot 102 . When the upper mold 11 and the lower mold 12 are separated, the elastic support assembly can push the floating block 20 outward.

[0027] In this way, when the upper mold 11 and the lower mold 12 are in a completely fitted mold state, the two floating blocks 20 push each other and slide into the slot 102, the bending surface 201 is adapted to the bending groove 101, and no bulge or depression is formed in the bending groove 101, which will not affect the tube bending process; when the tube bending is completed and the upper mold 11 and the lower mold 12 are opened, the floating block 20 slides outward under the action of the elastic support component and lifts the metal tube, so that the metal tube is separated from the bending groove 101 (such as Figure 2 and Figure 4 As shown in the figure, when the metal tube is fed, the metal tube will not rub against the bending groove 101. When the wear of the floating block 20 does not meet the production requirements, only the floating block 20 needs to be replaced, and there is no need to replace the entire mold, thereby reducing the use and maintenance costs.

[0028] In a specific embodiment, the elastic support assembly includes an elastic member 21 and a cover plate 22. The cover plate 22 is fixed to one end of the slot 102 away from the bending groove 101. One end of the elastic member 21 is fixed to the cover plate 22. The other end of the elastic member 21 is connected to the floating material block 20. The elastic member 21 can apply an elastic supporting force to slide outward to the floating material block 20.

[0029] Furthermore, a limiting column 25 is fixed on the cover plate 22 . The limiting column 25 is located between the floating material block 20 and the cover plate 22 . The limiting column 25 can play a role of limiting support for the floating material block 20 .

[0030] In this way, when the upper mold 11 and the lower mold 12 are in a completely fitted mold state, the float block 20 slides until the bending surface 201 is adapted to the bending groove 101, and at this time, the float block 20 is in contact with the limiting column 25, and the limiting column 25 can play a role of rigid support for the float block 20, thereby preventing the float block 20 from continuing to slide due to pressure when bending the pipe, thereby maintaining the adaptability of the bending surface 201 and the bending groove 101.

[0031] Combination Figure 6 and Figure 7 As shown, a limiting flange 24 is provided on the float block 20, and a step corresponding to the limiting flange 24 is provided in the slot 102. When the float block 20 is pushed outward from the slot 102 by the elastic member 21, the cooperation between the limiting flange 24 and the step can limit the float block 20 and prevent the float block 20 from escaping from the slot 102.

[0032] Combination Figure 6 and Figure 7 As shown, an oil pumping gap 202 is provided in the float block 20, a plurality of oil seepage holes 203 distributed in an array and connected to the oil pumping gap 202 are provided on the bending surface 201, and an oil supply component connected to the oil pumping gap 202 and used for supplying oil to the oil pumping gap 202 is provided on the upper mold 11 and the lower mold 12.

[0033] In this way, the oil supply assembly supplies oil to the oil pump gap 202, and the oil seeps out through the oil seepage hole 203 and adheres to the bending surface 201. When the metal pipe slides and rubs against the bending surface 201, the friction force can be reduced, thereby reducing the wear of the bending surface 201 of the floating material block 20 and increasing the service life of the floating material block 20.

[0034] In a specific embodiment, the float block 20 is a hollow structure with a large cavity inside. A core 23 is inserted into the cavity of the float block 20 to reduce the volume of the cavity and form a small oil pump gap 202 between the core 23 and the inner wall of the bending surface 201, thereby supplying oil to the oil seepage hole 203 while reducing the amount of oil stored in the float block 20.

[0035] Furthermore, the oil seepage hole 203 is opened perpendicular to the bending surface 201, so that the area of ​​the oil seepage hole 203 on the bending surface 201 is small, thereby avoiding indentations on the inner side of the bent pipe when bending the pipe.

[0036] In an optional embodiment, the diameter of the oil seepage hole 203 is 0.1-0.2 mm, and the diameter of the oil seepage hole 203 is preferably 0.1 mm. The use of a smaller diameter oil seepage hole 203 can avoid indentation on the inner side of the elbow while meeting the oil seepage requirement.

[0037] Combination Figure 7 As shown, an oil delivery hole 231 connected to the oil pump gap 202 is opened on the insert 23, and the oil is delivered to the oil pump gap 202 through the insert 23. The end of the oil delivery hole 231 connected to the oil supply component is far away from the slot 102 and will not interfere with the sliding of the float block 20. The oil supply component is connected to the oil delivery hole 231, and oil is supplied to the oil pump gap 202 through the oil delivery hole 231.

[0038] Combination Figure 1 , Figure 6 and Figure 7 As shown, the oil supply assembly includes an oil pipe 30 and a connecting hose 31. The oil pipe 30 is connected with connecting hoses 31 corresponding to the number of floating blocks 20. The connecting hoses 31 are connected to the oil holes 231. The oil pipe 30 is connected to an external oil supply device. The external oil supply device supplies oil to the oil pump gap 202 through the oil pipe 30, the connecting hose 31 and the oil holes 231 in sequence. Under the oil pump pressure, the lubricating oil in the oil pump gap 202 seeps out through the oil seepage holes 203.

[0039] In an optional embodiment, the connecting hose 31 is a rubber hose, which is relatively soft and can still meet the requirements of oil circuit connection when the floating block 20 floats up and down.

[0040] It should be understood that since the maximum bending angle of the single-head pipe bender is 180°, the corresponding maximum rotation angle of the wheel mold is 180°. Therefore, the oil pipeline 30 is softly connected to the oil supply equipment with a hose, which can meet the oil circuit connection requirements when the wheel mold rotates.

[0041] Combination Figure 5 As shown, two positioning guide pins 13 are fixed to one end corresponding to the upper mold 11 and the lower mold 12, and a guide pin hole 121 corresponding to the positioning guide pin 13 is opened on the lower mold 12. The positioning guide pin 13 and the guide pin hole 121 have a high matching accuracy. When the upper mold 11 and the lower mold 12 are closed, the positioning guide pin 13 is inserted into the guide pin hole 121, which can play a guiding role, thereby improving the closing accuracy of the upper mold 11 and the lower mold 12 and avoiding large misalignment at the joint of the bending groove 101.

[0042] Furthermore, the guide post hole 121 is a through hole that penetrates the lower mold 12 , so as to prevent the positioning guide post 13 from being blocked by air pressure when being inserted into the guide post hole 121 .

[0043] Combination Figure 5 As shown, an axial hole 103 for installing a mandrel is provided at the center of the lower die 12, and the lower die 12 is fixed on the pipe bending machine through the mandrel.

[0044] Furthermore, the upper mold 11 is provided with an avoidance hole 104 corresponding to the shaft hole 103 . When the molds are closed, the head of the core shaft is placed in the avoidance hole 104 , which will not affect the closing of the upper mold 11 and the lower mold 12 .

[0045] Combination Figure 1 As shown, the upper mold 11 is connected to a driving mechanism 40 for driving the upper mold 11 to rise or fall.

[0046] In an optional embodiment, the driving mechanism 40 includes a cylinder, a hydraulic cylinder or an electric push rod. The driving mechanism 40 preferably uses a hydraulic cylinder, which can share a hydraulic station with the pipe bending machine to improve the integration of the equipment.

[0047] The working principle of the present invention is as follows: the lower die 12 is fixed on the pipe bending machine through the mandrel, and the upper die 11 is connected to a hydraulic cylinder, which can drive the upper die 11 to rise or fall. When the pipe is bent, the upper die 11 and the lower die 12 are in a completely fitted mold state, and the two floating blocks 20 push each other and slide into the slot 102. The bending surface 201 is adapted to the bending groove 101. No bulge or depression will be formed in the bending groove 101, and the pipe bending process will not be affected. The positioning guide post 13 is inserted into the guide post hole 121, which can play a guiding role and improve the upper die 11. The clamping precision of the lower die 12 and the clamping die 11 and the lower die 12 simultaneously play a connecting role, so that the upper die 11 and the lower die 12 rotate synchronously. Correspondingly, at this time, the bending groove 101 forms a groove with a semicircular cross-section, and the bending groove 101 is provided with an arc segment and a straight segment, the straight segment is tangent to the arc segment, and the straight segment corresponds to the clamping die of the pipe bending machine. Through the cooperation of the clamping die and the straight segment of the wheel die, one end of the metal pipe is fixed, the wheel die and the clamping die rotate synchronously, and the metal pipe is bent along the arc segment of the bending groove 101. According to the processing requirements, the wheel die and the clamping die rotate corresponding angles, so that the metal pipe is bent to a specified angle; After the pipe is bent, the hydraulic cylinder lifts the upper die 11 to separate the upper die 11 from the lower die 12. At this time, the bending groove 101 separates up and down at the middle position in the height direction, so that the metal pipe is not clamped by the bending groove 101. Accordingly, the extrusion force generated by the deformation of the metal pipe and the bending groove 101 disappears, which can effectively avoid the phenomenon of material jamming. When the upper mold 11 and the lower mold 12 are separated, the floating material block 20 slides outward under the action of the elastic member 21 and lifts the metal tube so that the metal tube is separated from the bending groove 101 (such as Figure 2 and Figure 4 As shown in the figure, when the metal tube is fed, the metal tube will not rub against the bending groove 101. When the wear of the floating block 20 does not meet the production requirements, only the floating block 20 needs to be replaced, and there is no need to replace the entire mold, thereby reducing the use and maintenance costs; When bending the pipe, the oil supply equipment supplies oil to the oil pumping gap 202 through the oil delivery pipe 30, the connecting hose 31 and the oil delivery hole 231 in sequence. Under the oil pumping pressure, the lubricating oil in the oil pumping gap 202 seeps outward through the oil seepage hole 203 and adheres to the bending surface 201. When the metal pipe slides and rubs against the bending surface 201, the friction force can be reduced, thereby reducing the wear of the bending surface 201 of the floating block 20, thereby increasing the service life of the floating block 20.

[0048] In summary of the above embodiments: by setting the wheel die body 10 as an upper die 11 and a lower die 12 that can be split and moved up and down, after the tube bending is completed, the upper die 11 is lifted to separate the upper die 11 and the lower die 12. At this time, the bending groove 101 is separated up and down along the middle position of the height direction, so that the metal tube is not clamped by the bending groove 101. Accordingly, the extrusion force generated by the deformation of the metal tube and the bending groove 101 disappears, which can effectively avoid the phenomenon of material jamming; A plurality of floating blocks 20 are arranged along the bending groove 101. When the upper die 11 and the lower die 12 are separated, the floating blocks 20 slide outwards under the action of the elastic member 21 and lift the metal tube so that the metal tube is separated from the bending groove 101 (such as Figure 2 and Figure 4 As shown in the figure, when the metal tube is fed, the metal tube will not rub against the bending groove 101. When the wear of the floating block 20 does not meet the production requirements, only the floating block 20 needs to be replaced, and there is no need to replace the entire mold, thereby reducing the use and maintenance costs; An oil pumping gap 202 is provided in the float block 20, and a plurality of oil seepage holes 203 distributed in an array and connected to the oil pumping gap 202 are provided on the bending surface 201. The oil supply assembly supplies oil to the oil pumping gap 202, and the oil seeps out through the oil seepage holes 203 and adheres to the bending surface 201. When the metal pipe slides and rubs against the bending surface 201, the friction force can be reduced, thereby reducing the wear of the bending surface 201 of the float block 20 and increasing the service life of the float block 20.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A wheel die of a single-head pipe bending machine for ship ladder processing, comprising a wheel die body (10), wherein the wheel die body (10) is provided with a bending groove (101) for bending the pipe, characterized in that: The wheel die body (10) comprises an upper die (11) and a lower die (12) which are symmetrically arranged in an upper and lower direction; A plurality of groups of floating material components are distributed along the path of the bending groove (101), wherein the floating material components include two floating material blocks (20) symmetrically arranged up and down, the upper mold (11) and the lower mold (12) are both provided with slots (102) for installing the floating material blocks (20), an elastic support component is provided inside the slots (102) so that the floating material blocks (20) can float up and down along the slots (102), and a bending surface (201) adapted to the bending groove (101) is provided on the floating material block (20); An oil pumping gap (202) is provided in the floating material block (20), a plurality of oil seepage holes (203) distributed in an array and connected to the oil pumping gap (202) are provided on the bending surface (201), and an oil supply component connected to the oil pumping gap (202) and used for supplying oil to the oil pumping gap (202) is provided on both the upper die (11) and the lower die (12).

2. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1 is characterized in that: The elastic support assembly comprises an elastic member (21) and a cover plate (22); the cover plate (22) is fixed to one end of the slot (102) away from the bending groove (101); one end of the elastic member (21) is fixed to the cover plate (22); the other end of the elastic member (21) is connected to the floating material block (20) for applying an elastic force to the floating material block (20) to slide outwards.

3. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1 is characterized in that: A limiting flange (24) is provided on the floating material block (20), and a step corresponding to the limiting flange (24) is provided in the slot (102).

4. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1 is characterized in that: An insert core (23) is inserted into the interior of the floating material block (20), and the oil pumping gap (202) is formed between the insert core (23) and the inner wall of the bending surface (201).

5. The wheel die of the single-head pipe bender for ship ladder processing according to claim 4 is characterized in that: The insert (23) is provided with an oil delivery hole (231) communicating with the oil pumping gap (202); the oil supply assembly is connected to the oil delivery hole (231) to supply oil into the oil pumping gap (202) through the oil delivery hole (231).

6. The wheel die of the single-head pipe bender for ship ladder processing according to claim 2 is characterized in that: A limiting column (25) is fixed on the cover plate (22), and the limiting column (25) is located between the floating material block (20) and the cover plate (22).

7. The wheel die of the single-head pipe bender for ship ladder processing according to claim 5 is characterized in that: The oil supply assembly comprises an oil delivery pipe (30) and a connecting hose (31), the oil delivery pipe (30) being connected to connecting hoses (31) corresponding in number to the number of the floating blocks (20), and the connecting hoses (31) being connected to the oil delivery holes (231).

8. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1 is characterized in that: Two positioning guide pillars (13) are fixed to one end of the upper mold (11) corresponding to the lower mold (12); the lower mold (12) is provided with guide pillar holes (121) corresponding to the positioning guide pillars (13); when the upper mold (11) and the lower mold (12) are closed, the positioning guide pillars (13) are inserted into the guide pillar holes (121).

9. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1 is characterized in that: The upper mold (11) is connected to a driving mechanism (40) for driving the upper mold (11) to rise or fall.

10. The wheel die of the single-head pipe bender for ship ladder processing according to claim 1, characterized in that: An axial hole (103) for mounting a core shaft is provided at the center of the lower die (12), and a position avoidance hole (104) corresponding to the axial hole (103) is provided on the upper die (11).

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