Bending die for strip-shaped plate

Abstract

The utility model provides a strip-shaped plate bending die which comprises an upper pressing die and a lower pressing die capable of being opened and closed with the upper pressing die, the lower pressing die comprises a fixing section and a bending section, the fixing section is provided with a strip-shaped plate limiting structure, and the lower pressing die is arranged on the bending section; a convex press-fit cambered surface and a first horizontal press-fit surface are formed on the bent section of the lower pressing die, and a concave press-fit cambered surface and a second horizontal press-fit surface are formed on the bottom surface of the upper pressing die; the outer convex press fit cambered surface and the inner concave press fit cambered surface are oppositely arranged, the first horizontal press fit surface and the second horizontal press fit surface are oppositely arranged, and the first horizontal press fit surface and the second horizontal press fit surface are provided with press fit guide structures. The bending die is simple in structure and good in stability, the fixed pressing block and the lower pressing die are assembled and fixed along the pressing block sliding groove, and high-strength strip-shaped plates are prevented from sliding and warping in the bending forming process.

Description

Technical Field

[0001] The utility model relates to the technical field of material forming, in particular to a strip plate bending die. Background Art

[0002] High temperature gas-cooled reactor is one of the advanced fourth generation nuclear power reactor technologies, with advantages such as good safety, high efficiency, good economy and wide application. During the assembly process, it is necessary to use a fixing bar made of N06625 (Ni-Cr based solid solution strengthened deformable high temperature alloy) to fix the spiral tube bundle, and the end fixing bar needs to wrap the heat transfer tube after bending and weld it with the load-bearing bar. Due to the high strength of N06625 material, the thickness of the fixing bar is 3~4mm, the width is 9mm, and the length that needs to be deformed is only 32.5mm. The specification of the heat transfer tube to be wrapped is φ19mm, the bending shape is "Z" shape, and the end straight section is extreme. Generally, bending cannot be formed by force, which is extremely difficult.

[0003] The Chinese patent document discloses "a short-side bending mold", and its publication number is CN215965880U. When the bending angle needs to be adjusted, the expansion component drives the first sub-mold to move, adjusts the distance between the first sub-mold and the lower mold, and adjusts the distance between the second sub-mold and the upper mold through the connecting component to achieve the effect of adjusting the bending angle. The servo motor drives the threaded rod to rotate, so that the first sub-mold moves laterally on the outer wall of the threaded rod to achieve the effect of adjusting the distance between the first sub-mold and the lower mold, and stabilizes the position of the first sub-mold through the positioning component, and the positioning rod is slidably connected to the inside of the positioning groove to achieve the effect of stabilizing the position of the first sub-mold. However, the mold structure of the utility model is relatively complex, and it is easy to have position deviation when applied to the bending of strip plates, and the bending cannot be formed by force. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the utility model is to provide a strip plate bending die to solve the problem that the existing bending die cannot be bent into shape when used for short-distance bending of high-strength strip plates, and the bending is difficult.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model is implemented by including the following technical solutions.

[0006] The utility model provides a strip plate bending die, comprising an upper die and a lower die capable of opening and closing with the upper die, the lower die comprising a fixed section and a bending section, the fixed section being provided with a strip plate limiting structure, the lower die being arranged at the bending section; the bending section of the lower die is formed with an outer convex pressing arc surface and a first horizontal pressing surface, the bottom surface of the upper die is formed with an inner concave pressing arc surface and a second horizontal pressing surface; the outer convex pressing arc surface and the inner concave pressing arc surface are arranged oppositely, the first horizontal pressing surface and the second horizontal pressing surface are arranged oppositely, and the first horizontal pressing surface and the second horizontal pressing surface are provided with a pressing guide structure.

[0007] Preferably, the pressing guide structure includes an upper guide column hole arranged on the first horizontal pressing surface, a lower guide column hole arranged on the second horizontal pressing surface and a guide column, and the guide column passes through the upper guide column hole and the lower guide column hole in sequence; the upper die and the lower die can make opening and closing movements along the guide column; the first horizontal pressing surface and the second horizontal pressing surface are completely fitted with the two side surfaces of the strip plate respectively during pressing, and the two side surfaces refer to the upper and lower surfaces.

[0008] Preferably, the strip plate limiting structure comprises a fixed pressing block disposed above the lower die and a pressing block slide groove disposed on both sides of the lower die, the bottoms of both sides of the fixed pressing block are slidably connected with the lower die through the pressing block slide groove, and the fixed pressing block and the surface of the lower die are provided with a limiting space for accommodating the strip plate. The fixed pressing block is assembled and fixed with the lower die along the pressing block slide groove to prevent the strip plate from slipping and warping during bending.

[0009] Preferably, the strip plate limiting structure also includes at least two assembly through holes arranged in the non-bending section of the strip plate, a positioning hole and a fixing pin arranged on the surface of the lower die corresponding to the assembly through holes, and the fixing pin passes through the assembly through hole and the positioning hole in sequence.

[0010] Preferably, the assembly through holes and the positioning holes are distributed at intervals along the length direction of the strip plate.

[0011] Preferably, the convex pressed arc surface includes, from top to bottom, a quarter arc segment A and a straight segment B deviating along the direction close to the center of the quarter arc segment A. The angle α between the straight segment B and the tangent of the quarter arc segment A is 15~20°, which provides a certain deformation space when the strip plate is bent, and is conducive to releasing stress, avoiding damage to the convex pressed arc surface of the lower die, and is conducive to improving the service life of the device.

[0012] Preferably, the concave pressed arc surface includes, from top to bottom, a horizontally arranged straight segment C, a quarter-circle arc segment D, a vertically arranged straight segment E and a quarter-circle arc segment F, and the bending direction of the quarter-circle arc segment F is opposite to that of the quarter-circle arc segment D.

[0013] Preferably, during pressing, the quarter arc segment A corresponds to the quarter arc segment C, and the quarter arc segment F corresponds to the angle between the straight segment B and the first horizontal pressing surface.

[0014] Preferably, the radius R of the quarter arc segment F is F , the radius R of the quarter arc segment A A and the radius R of the quarter arc segment D D The ratio is 1:(3~4):(4~5).

[0015] Preferably, the radius R of the quarter arc segment F is F is 2.5 mm, and the radius R of the quarter arc segment A is A is 8.5 mm, and the radius R of the quarter arc segment D is D It is 11.5mm.

[0016] As described above, the strip sheet bending die of the utility model has the following beneficial effects: simple structure, good stability, and the assembly and fixation of the fixed pressing block along the pressing block slide groove and the lower pressing die can prevent the strip sheet from slipping and warping during bending; by setting the angle α between the straight segment B and the tangent of the quarter arc segment A to 15~20°, a certain deformation space is provided when the strip sheet is bent, which is beneficial to releasing stress and avoiding damage to the convex pressing arc surface of the lower pressing die, which is beneficial to improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It shows a schematic diagram of the structure of the strip sheet bending mold before pressing.

[0018] Figure 2 It shows a schematic diagram of the structure of the strip sheet bending mold after pressing.

[0019] Figure 3 Shown is a schematic diagram of the structure of the lower die.

[0020] Figure 4 Display as Figure 3 Front view of.

[0021] Figure 5 Shown is a side view of the upper die.

[0022] Figure 6 Shown is a schematic diagram of the structure of the fixed pressure block.

[0023] Figure 7 It shows a schematic diagram of the product after the strip plate is bent.

[0024] Explanation of the accompanying drawings: upper die 1, lower die 2, convex pressing arc surface 11, first horizontal pressing surface 12, concave pressing arc surface 21, second horizontal pressing surface 22, upper guide column hole 121, lower guide column hole 221, guide column 3, strip plate 4, fixed pressing block 23, pressing block slide groove 24, assembly through hole 41, positioning hole 26, quarter arc segment A, straight segment B, straight segment C, quarter arc segment D, straight segment E, quarter arc segment F. DETAILED DESCRIPTION

[0025] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0026] See also Figures 1 to 7 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0027] like Figure 1 and Figure 2 As shown, the utility model provides a strip plate bending die, comprising an upper die 1 and a lower die 2 that can be opened and closed with the upper die, the lower die comprising a fixed section and a bending section, the fixed section is provided with a strip plate limiting structure, the lower die is provided at the bending section; the bending section of the lower die is formed with an outer convex pressing arc surface 11 and a first horizontal pressing surface 12. Figure 4 As shown, the convex pressed arc surface 11 includes, from top to bottom, a quarter arc segment A and a straight segment B deviating from the center of the quarter arc segment A, and the included angle α between the straight segment B and the tangent of the quarter arc segment A is 15°. Figure 5 As shown, the bottom surface of the upper die is formed with an inner concave pressing arc surface 21 and a second horizontal pressing surface 22; the inner concave pressing arc surface 21 includes, from top to bottom, a horizontally arranged straight segment C, a quarter arc segment D, a vertically arranged straight segment E and a quarter arc segment F, and the bending direction of the quarter arc segment F is opposite to that of the quarter arc segment D. The radius R of the quarter arc segment F is Fis 2.5 mm, and the radius R of the quarter arc segment A is A is 8.5 mm, and the radius R of the quarter arc segment D is D The outer convex pressed arc surface and the inner concave pressed arc surface are arranged oppositely, the first horizontal pressed surface and the second horizontal pressed surface are arranged oppositely, and the first horizontal pressed surface and the second horizontal pressed surface are provided with a pressed guide structure. During pressing, the quarter arc segment A corresponds to the quarter arc segment C, and the quarter arc segment F corresponds to the angle between the straight segment B and the first horizontal pressed surface.

[0028] The pressing guide structure includes an upper guide post hole 121 provided on the first horizontal pressing surface, a lower guide post hole 221 provided on the second horizontal pressing surface (see Figure 3 ) and a guide post 3, wherein the guide post passes through the upper guide post hole and the lower guide post hole in sequence; the upper die and the lower die can open and close along the guide post; Figure 2 As shown, the first horizontal pressing surface and the second horizontal pressing surface are completely in contact with the two side surfaces of the strip plate 4 during pressing.

[0029] The strip plate limiting structure includes a fixed pressing block 23 disposed above the lower pressing die and a pressing block slide 24 disposed on both sides of the upper pressing die. Figure 6 As shown, the bottom of both sides of the fixed pressing block is provided with slide rails, and the slide rails are slidably connected with the lower pressing die through the pressing block slide grooves. The fixed pressing block and the lower pressing die surface are provided with a limiting space for accommodating the strip plate. The strip plate limiting structure also includes two assembly through holes 41 (see Figure 7 ), a positioning hole 26 and a fixing pin (not shown) are arranged on the surface of the lower die and correspond to the assembly through hole. The fixing pin passes through the assembly through hole 41 and the positioning hole 26 in sequence to realize the positioning of the strip plate to avoid position deviation during pressing. The assembly through hole and the positioning hole are spaced apart along the length direction of the strip plate.

[0030] The high temperature gas-cooled reactor is one of the advanced fourth-generation nuclear power reactor technologies, with advantages such as good safety, high efficiency, good economy and wide application. During the assembly process, the following methods need to be used: Figure 7 The fixing strips of N06625 material shown in the figure fix the spiral tube bundle, and the end fixing strips need to wrap the heat transfer tube after bending and weld with the load-bearing strips. Due to the high strength of N06625 material, the thickness of the fixing strips is 3~4mm, the width is 9mm, and the length that needs to be deformed is only 32.5mm (L1+L2+L3+L4). The specification of the heat transfer tube to be wrapped is φ19mm, the bending shape is "Z" shape, and the end straight section is extremely difficult. Generally, bending cannot be formed by force, which is extremely difficult.

[0031] The working principle of using the strip plate bending die of the utility model to complete the bending of the fixing strip of the above-mentioned N06625 material is as follows:

[0032] like Figure 1 As shown, first place the strip sheet 4 (fixed strip of N06625 material) on the surface of the lower die 2, and make the non-bending section of the strip sheet 4 to be at the fixed section of the lower die, and when the bending section is at the bending section of the lower die, make the assembly through hole 41 correspond to the positioning hole 26, and then use a fixing pin to pass through the assembly through hole 41 and the positioning hole 26 in sequence to realize the positioning of the strip sheet.

[0033] The fixed pressing block 23 is assembled and fixed with the lower pressing die 2 along the pressing block sliding groove 24 to prevent the strip-shaped plate 4 from slipping and warping during the bending process.

[0034] The entire strip sheet bending mold is placed under the press and bent into shape. The bent product is as follows Figure 7 shown.

[0035] In summary, the utility model has a simple structure and good stability. The fixed pressing block is assembled and fixed along the pressing block slideway with the lower pressing die to prevent the strip plate from slipping and warping during bending. By setting the angle α between the straight section B and the tangent of the quarter arc section A to 15-20°, a certain deformation space is provided for the strip plate when bending, and it is conducive to releasing stress, avoiding damage to the outer convex pressing arc surface of the lower pressing die, and is conducive to improving the service life of the device. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A strip plate bending die, characterized in that: The invention comprises an upper die (1) and a lower die (2) capable of opening and closing with the upper die, wherein the lower die comprises a fixed section and a bending section, the fixed section is provided with a strip plate limiting structure, and the lower die is provided at the bending section; the bending section of the lower die is provided with an outer convex pressing arc surface (11) and a first horizontal pressing surface (12), and the bottom surface of the upper die is provided with an inner concave pressing arc surface (21) and a second horizontal pressing surface (22); the outer convex pressing arc surface and the inner concave pressing arc surface are arranged opposite to each other, the first horizontal pressing surface and the second horizontal pressing surface are arranged opposite to each other, and the first horizontal pressing surface and the second horizontal pressing surface are provided with a pressing guide structure.

2. The strip sheet bending die according to claim 1, characterized in that: The pressing guide structure comprises an upper guide post hole (121) provided on a first horizontal pressing surface, a lower guide post hole (221) provided on a second horizontal pressing surface, and a guide post (3), wherein the guide post passes through the upper guide post hole and the lower guide post hole in sequence; the upper pressing die and the lower pressing die can perform opening and closing movements along the guide post; and the first horizontal pressing surface and the second horizontal pressing die are completely in contact with the two side surfaces of the strip plate (4) respectively during pressing.

3. The strip sheet bending die according to claim 1, characterized in that: The strip plate limiting structure comprises a fixed pressing block (23) arranged above the lower pressing die and pressing block slide grooves (24) arranged on both sides of the upper pressing die, the bottoms of both sides of the fixed pressing block are slidably connected to the lower pressing die via the pressing block slide grooves, and the fixed pressing block and the lower pressing die surface are provided with limiting spaces for accommodating the strip plate.

4. The strip sheet bending die according to claim 3, characterized in that: The strip plate limiting structure further comprises at least two assembly through holes (41) provided in the non-bending section of the strip plate, a positioning hole (26) provided on the surface of the lower die and corresponding to the assembly through holes, and a fixing pin, wherein the fixing pin passes through the assembly through hole and the positioning hole in sequence.

5. The strip sheet bending die according to claim 4, characterized in that: The assembly through holes and the positioning holes are distributed at intervals along the length direction of the strip plate.

6. The strip sheet bending die according to claim 1, characterized in that: The convex pressed arc surface includes, from top to bottom, a quarter arc segment A and a straight segment B deviating in a direction close to the center of the quarter arc segment A, and an angle α between the straight segment B and the tangent of the quarter arc segment A is 15-20°.

7. The strip sheet bending die according to claim 6, characterized in that: The concave pressed arc surface includes, from top to bottom, a horizontally arranged straight segment C, a quarter arc segment D, a vertically arranged straight segment E and a quarter arc segment F, wherein the bending direction of the quarter arc segment F is opposite to that of the quarter arc segment D.

8. The strip sheet bending die according to claim 7, characterized in that: During pressing, the quarter arc segment A corresponds to the quarter arc segment C, and the quarter arc segment F corresponds to the angle between the straight segment B and the first horizontal pressing surface.

9. The strip sheet bending die according to claim 8, characterized in that: The radius R of the quarter arc segment F F , the radius R of the quarter arc segment A A and the radius R of the quarter arc segment D D The ratio is 1:(3~4):(4~5).

10. The strip sheet bending die according to claim 9, characterized in that: The radius R of the quarter arc segment F F is 2.5 mm, and the radius R of the quarter arc segment A is A is 8.5 mm, and the radius R of the quarter arc segment D is D It is 11.5mm.

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