Split type push-bending forming device

Abstract

The utility model discloses a split type push-bending forming device which comprises a die body and a bending module, the die body is provided with a containing groove, the die body is provided with an input section and an output section, and the containing groove is respectively communicated with the input section and the output section. The bending module is detachably arranged in the containing groove, the bending module is provided with a bending section, the input section, the bending section and the output section are sequentially communicated to form a forming cavity, and the mold body is used for being matched with the bending radiuses of the bending sections of different bending modules. According to the device, a large amount of labor cost and time cost can be saved, due to the fact that only bending modules with different bending radiuses need to be machined and replaced for installation, the situation that the whole push-bending die with different bending radiuses is redesigned and machined is avoided, and a large amount of economic cost is further saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tube medium push-bending forming, in particular to a split push-bending forming device. Background Art

[0002] The push-bending method of pipe is a secondary plastic processing method that uses axial thrust to gradually bend and deform the rolled straight pipe in the cavity of the bending die. It is widely used in the production and manufacturing of various types of bent pipes and elbows in the fields of aerospace, vehicles and ships. Traditional pipe push-bending generally includes a bending die, a push head, a flexible push rod and a filling medium. The bending die is generally a mirror-symmetrical upper and lower die. After the upper and lower dies are closed, the overall cavity provides a constrained bending environment for the pipe. The push head applies a forward thrust, the flexible push rod is used to provide a reverse thrust, and the filling medium is used to support the pipe wall during the push-bending process. This method has the advantages of high production efficiency, wide applicability, and high material utilization. According to different pipe material properties and bending requirements, the process parameters need to be carefully adjusted to ensure the forming quality and meet the diverse production needs.

[0003] The bending radius R refers to the radius of the middle layer of the bending geometry of the pipe. The push-bending of pipes with different bending radii is of great significance for exploring the influence of the bending radius on the quality of pipe forming, and gradually realizing the forming and manufacturing of pipes with smaller bending radius in practice. As a typical process parameter for pipe push-bending, the bending radius R is determined by the bending radius of the bending mold cavity, that is, a set of bending molds is formed to obtain a pipe with a bending radius. If pipes of the same specifications (same pipe outer diameter D and wall thickness t) and different bending radii R are to be formed, the entire set of bending molds needs to be replaced. Each replacement includes re-manufacturing the bending mold, disassembling the entire set of molds from the machine tool equipment, and reinstalling another set of bending molds to adjust the gap and position. The replacement process not only increases the economic cost, but also consumes a lot of manpower and time. Utility Model Content

[0004] Based on this, it is necessary to provide a split push-bending forming device that can save economic costs as well as manpower and time.

[0005] A split push-bending forming device, comprising:

[0006] The mold body is provided with a receiving groove, the mold body has an input section and an output section, and the receiving groove is respectively connected with the input section and the output section;

[0007] A bending module, wherein the bending module is detachably arranged in the accommodating groove, the bending module has a bending section, one end of the bending section is used to dock and communicate with the input section, and the other end of the bending section is used to dock and communicate with the output section, the input section, the bending section and the output section are connected in sequence to form a forming cavity, and the forming cavity is used for push-bending and forming of the pipe, and the mold body is used to adapt to different bending radii of the bending section of the bending module.

[0008] Optionally, a fixing member is further included, the accommodating groove is provided with a first fixing hole, the bending module is provided with a second fixing hole, the second fixing hole is spaced apart from the bending section, and the fixing member is used to pass through the second fixing hole and the first fixing hole in sequence to achieve fixation of the bending module relative to the mold body.

[0009] Optionally, the fixing member includes a main body and a fixing portion, the main body is arranged at the bottom end of the fixing portion, the main body is used to pass through the second fixing hole and the first fixing hole in sequence, and the fixing portion is arranged in the first fixing hole.

[0010] Optionally, the second fixing hole includes a first through hole and a second through hole that are connected to each other, the first through hole is located above the second through hole, the second through hole is used to communicate with the first fixing hole, the diameter of the first through hole is larger than the diameter of the second through hole, the main body is used to pass through the first through hole, the second through hole and the first fixing hole in sequence, the fixing part is arranged inside the first through hole, and the bottom wall of the fixing part is used to abut against the bottom wall of the first through hole.

[0011] Optionally, a depth of the first through hole is not less than a thickness of the fixing portion.

[0012] Optionally, the number of the first fixing holes and the number of the second fixing holes are both two, the two first fixing holes are arranged at two opposite corners of the accommodating groove, and the two second fixing holes are respectively arranged at two opposite sides of the bending section.

[0013] Optionally, the top surface of the bending module is flush with the top surface of the mold body.

[0014] Optionally, the thickness of the mold body is greater than the thickness of the bending module.

[0015] Optionally, the bending radius is 0.8D, 0.9D or 1D, where D is the outer diameter of the tube.

[0016] Optionally, an indicator mark is further included, which is arranged on the outer surface of the bending module, and the indicator mark is used to indicate the value of the bending radius of the bending module.

[0017] The present application provides a split push-bending forming device, which detachably sets the bending module in the receiving groove of the mold body. When performing push-bending forming of pipes of the same specification and different bending radii, the bending modules with different bending radii can be installed in the receiving groove without removing the mold body, so that the bending sections with different bending radii are connected to the input section and the output section respectively, and the forming cavities with different bending radii are formed, thereby achieving push-bending forming of pipes of the same specification and different bending radii. The device of the present application can save a lot of manpower and time costs, because only the bending modules with different bending radii need to be processed and replaced and installed, avoiding the need to redesign and process the entire push-bending mold with different bending radii, and also saving a lot of economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a schematic structural diagram of a split push-bending forming device in one embodiment;

[0020] Figure 2 This is a schematic structural diagram of a mold body in one embodiment;

[0021] Figure 3 This is a schematic structural diagram of a bending module in one embodiment;

[0022] Figure 4 Schematic diagram of the structure of bending modules with different bending radii in one embodiment, a is a bending radius R=1D, b is a bending radius R=0.9D, and c is a bending radius R=0.8D;

[0023] Figure 5 Schematic diagram of the structure of a fixing member in one embodiment.

[0024] 1. Mold body; 11. Accommodating groove; 12. Input section; 13. Output section; 14. First fixing hole; 2. Bending module; 21. Bending section; 22. Second fixing hole; 221. First through hole; 222. Second through hole; 3. Molding cavity; 4. Fixing piece; 41. Main body; 42. Fixing part; 5. Pipe.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B; in addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] refer to Figures 1 to 3 The present application provides a split push-bending forming device, which includes a mold body 1 and a bending module 2. The mold body 1 is provided with a accommodating groove 11. The mold body 1 has an input section 12 and an output section 13. The accommodating groove 11 is respectively connected with the input section 12 and the output section 13; the bending module 2 is detachably arranged in the accommodating groove 11. The bending module 2 has a bending section 21. One end of the bending section 21 is used to dock and communicate with the input section 12, and the other end of the bending section 21 is used to dock and communicate with the output section 13. The input section 12, the bending section 21 and the output section 13 are connected in sequence to form a forming cavity 3. The forming cavity 3 is used for push-bending and forming of the pipe. The mold body 1 is used to adapt to the bending radius of the bending section 21 of different bending modules 2.

[0030] The present application provides a split push-bending forming device, which can detachably set the bending module 2 in the receiving groove 11 of the mold body 1. When the tubes 5 of the same specification and different bending radii are push-bent, the bending modules 2 with different bending radii can be installed in the receiving groove 11 without removing the mold body 1, so that the bending sections 21 with different bending radii are connected with the input section 12 and the output section 13 respectively, and the forming cavities with different bending radii are formed, thereby realizing the push-bending forming of the tubes 5 of the same specification and different bending radii. The device of the present application can save a lot of manpower and time costs, because only the bending modules 2 with different bending radii need to be processed and replaced and installed, which avoids the need to redesign and process the entire push-bending mold with different bending radii, and also saves a lot of economic costs.

[0031] Specifically, refer to Figure 4 , the bending radius is 0.8D, 0.9D or 1D, and D is the outer diameter of the tube 5. Further, the device of the present application also includes an indicator mark, which is arranged on the outer surface of the bending module 2, and the indicator mark is used to indicate the value of the bending radius of the bending module 2, and the indicator mark can be 0.8D, 0.9D or 1D.

[0032] Specifically, the shape and size of the receiving groove 11 are compatible with the shape and size of the entire bending module 2. In this embodiment, the receiving groove 11 is a square structure. The input section 12, the bending section 21 and the output section 13 have the same diameter.

[0033] In actual use, the split push-bending forming device of the present application is a lower die, which is connected to the upper die to achieve push-bending forming of the tube 5. Furthermore, the structure of the upper die is the same as that of the lower die.

[0034] refer to Figures 1 to 5 The split push-bending forming device also includes a fixing member 4, the accommodating groove 11 is provided with a first fixing hole 14, the bending module 2 is provided with a second fixing hole 22, the second fixing hole 22 is spaced apart from the bending section 21, and the fixing member 4 is used to pass through the second fixing hole 22 and the first fixing hole 14 in sequence to achieve the fixation of the bending module 2 relative to the mold body 1.

[0035] Specifically, the number of the first fixing holes 14 and the number of the second fixing holes 22 are both two. The two first fixing holes 14 are arranged at the two diagonals of the accommodating groove 11, and the two second fixing holes 22 are respectively arranged on the opposite sides of the bending section 21 and located at the two diagonals of the bending module 2, so that the setting of the second fixing holes 22 will not hinder the push-bending forming of the tube 5.

[0036] Specifically, the first fixing hole 14 and the second fixing hole 22 are concentrically arranged.

[0037] refer to Figure 5 , Figure 2 and Figure 3 The fixing member 4 includes a main body 41 and a fixing portion 42 . The main body 41 is arranged at the bottom end of the fixing portion 42 . The main body 41 is used to pass through the second fixing hole 22 and the first fixing hole 14 in sequence. The fixing portion 42 is arranged in the first fixing hole 14 .

[0038] Specifically, the fixing member 4 is a screw, the main body 41 is a screw rod of the screw, and the fixing part 42 is a nut of the screw. Further, it is a hexagon socket head screw, and the first fixing hole 14 and the second fixing hole 22 are threaded holes.

[0039] refer to Figure 3 The second fixing hole 22 includes a first through hole 221 and a second through hole 222 which are connected to each other. The first through hole 221 and the second through hole 222 are concentrically arranged. The first through hole 221 is located above the second through hole 222. The second through hole 222 coincides with the first fixing hole 14. The second through hole 222 is used to communicate with the first fixing hole 14. The diameter of the first through hole 221 is greater than the diameter of the second through hole 222. The main body 41 is used to pass through the first through hole 221, the second through hole 222 and the first fixing hole 14 in sequence. The fixing part 42 is arranged inside the first through hole 221. The bottom wall of the fixing part 42 is used to abut against the bottom wall of the first through hole 221 to achieve the fixation of the bending module 2 relative to the mold body 1.

[0040] refer to Figure 1 , Figures 4 to 5 , the depth of the first through hole 221 is not less than the thickness of the fixing portion 42 .

[0041] Specifically, the depth of the first through hole 221 is equal to or slightly greater than the thickness of the fixing portion 42 , so that the fixing portion 42 will not be exposed outside the first through hole 221 to hinder the clamping of the upper mold and the lower mold.

[0042] The thickness of the mold body 1 is greater than that of the bending module 2. When the bending module 2 is installed and fixed in the receiving groove 11 of the mold body 1, the top surface of the bending module 2 is flush with the top surface of the mold body 1, so as not to hinder the mold closing.

[0043] A push-bending forming method, the method adopts the above-mentioned split push-bending forming device, and the method comprises the following steps:

[0044] S1. Design of mold body 1 and bending module 2

[0045] The design of the mold body 1 and the bending module 2 is very critical, and the processing accuracy requirements for both are high. It is necessary to ensure that the side where the cavity connection surface of the bending module 2 is located is completely fitted with the two side surfaces corresponding to the installation space on the mold body 1, and the matching gap is small. To ensure the installation and fixation of the bending module 2, the thickness of the mold body 1 must be greater than the thickness of the bending module 2. In addition, after the bending module 2 is tightened and fixed, its top surface is required to maintain a good flatness with the top surface of the mold body 1. The first fixing hole 14 and the second through hole 222 of the same specification are processed on the mold body 1 and the bending module 2, and then the first through hole 221 with a diameter larger than the second through hole 222 is processed. The relative position of the first fixing hole 14 should coincide with the relative position of the second through hole 222 of the bending module 2, and it is connected and tightened with a hexagon socket head screw. The specifications of the second fixing holes 22 of the bending modules 2 with different bending radii are consistent and meet the standards to ensure the interchangeability of the connecting screws. In order to avoid misidentification of bending modules 2 with different bending radii, the bending radius size, such as 1D, is marked on the surface of the bending module 2 with a marker pen. When the bending module 2 is taken and placed, the mark is manually confirmed to ensure correct selection.

[0046] S2, Tube 5 Push-bending Process

[0047] The prepared tube 5 is placed in the forming cavity 3, and it is noted that the inclined end surface of the front end of the tube 5 must be completely placed in the bending section 21 of the bending module 2, so as to minimize the surface defects such as extrusion depression that may occur when the tube passes through the gap between the mold body 1 and the bending module 2, thereby improving the forming quality of the tube 5. Then, a conventional tube 5 push-bending forming process is performed to complete the tube 5 push-bending forming with a bending radius.

[0048] S3, replace bending module 2

[0049] Bending modules 2 with different bending radii should be prepared in advance according to production or test needs. Each time the bending module 2 is replaced, all surfaces in contact between the mold body 1 and the bending module 2 should be wiped to avoid installation errors caused by dust, gravel and stains. For the lower mold fixed on the machine tool worktable, first loosen the connecting screws out of the threaded section of the mold body 1 but not completely so that they are still in the threaded section of the bending module 2. With the help of partially unscrewed screws, the bending module 2 is taken out vertically and placed on the mold storage table. Subsequently, the connecting screws are completely unscrewed for the installation and fixation of bending modules 2 with other bending radii. For the upper mold fixed to the machine tool main cylinder and moving up and down with it, due to the action of gravity, two people are required to operate when replacing the bending module 2, one person is responsible for holding the bending module 2, and the other is responsible for loading and unloading the connecting screws.

[0050] S4, Multi-bending radius pipe 5 push bending forming

[0051] Repeat steps S2 and S3 in sequence according to production or test needs, and carry out push-bending forming processes for multiple groups of tubes 5 with different bending radii. According to the forming results, other process parameters for push-bending forming of tubes 5 with different bending radii are carefully adjusted to ensure that the forming quality of the tubes 5 meets the requirements and to achieve push-bending forming of tubes 5 with different bending radii under the same specifications.

[0052] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A split push-bending forming device, characterized in that: include: The mold body is provided with a receiving groove, the mold body has an input section and an output section, and the receiving groove is respectively connected with the input section and the output section; A bending module, wherein the bending module is detachably arranged in the accommodating groove, the bending module has a bending section, one end of the bending section is used to dock and communicate with the input section, and the other end of the bending section is used to dock and communicate with the output section, the input section, the bending section and the output section are connected in sequence to form a forming cavity, and the forming cavity is used for push-bending and forming of the pipe, and the mold body is used to adapt to different bending radii of the bending section of the bending module.

2. The split push-bending forming device according to claim 1 is characterized in that: It also includes a fixing member, the accommodating groove is provided with a first fixing hole, the bending module is provided with a second fixing hole, the second fixing hole is spaced apart from the bending section, and the fixing member is used to pass through the second fixing hole and the first fixing hole in sequence to achieve fixation of the bending module relative to the mold body.

3. The split push-bending forming device according to claim 2 is characterized in that: The fixing member includes a main body and a fixing part, wherein the main body is arranged at the bottom end of the fixing part, the main body is used to pass through the second fixing hole and the first fixing hole in sequence, and the fixing part is arranged in the first fixing hole.

4. The split push-bending forming device according to claim 3 is characterized in that: The second fixing hole includes a first through hole and a second through hole that are connected to each other, the first through hole is located above the second through hole, the second through hole is used to communicate with the first fixing hole, the diameter of the first through hole is larger than the diameter of the second through hole, the main body is used to pass through the first through hole, the second through hole and the first fixing hole in sequence, the fixing part is arranged inside the first through hole, and the bottom wall of the fixing part is used to abut against the bottom wall of the first through hole.

5. The split push-bending forming device according to claim 4 is characterized in that: The depth of the first through hole is not less than the thickness of the fixing portion.

6. The split push-bending forming device according to claim 2, characterized in that: The number of the first fixing holes and the number of the second fixing holes are both two, the two first fixing holes are arranged at two opposite corners of the accommodating groove, and the two second fixing holes are respectively arranged at two opposite sides of the bending section.

7. The split push-bending forming device according to claim 1, characterized in that: The top surface of the bending module is flush with the top surface of the mold body.

8. The split push-bending forming device according to claim 1, characterized in that: The thickness of the mold body is greater than the thickness of the bending module.

9. The split push-bending forming device according to claim 1, characterized in that: The bending radius is 0.8D, 0.9D or 1D, where D is the outer diameter of the pipe.

10. The split push-bending forming device according to claim 1, characterized in that: It also includes an indicator mark, which is arranged on the outer surface of the bending module and is used to indicate the value of the bending radius of the bending module.

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