Cold roll forming die for low-temperature corrosion-resisting steel plate

Abstract

The invention discloses a cold roll forming die for a low-temperature corrosion-resistant steel plate, which belongs to the technical field of cold roll forming of steel plates and comprises a support plate, a cold roll female die component mounted on the lower side of the support plate and a cold roll male die component mounted on the upper side of the support plate. The multiple outer arc supporting rollers are distributed on the supporting plate in an arc shape. The cold bending male die assembly comprises an inner arc main stamping roller extending in the normal direction of the supporting plate, the inner arc main stamping roller is rotationally connected to a main telescopic support, the main telescopic support is connected to an output shaft of a rotation driving device, and the rotation driving device is installed on the supporting plate. The rotation driving device can drive the main telescopic support to do arc reciprocating motion with the center of the output shaft as the circle center, and the main telescopic support can stretch out and draw back in the radial direction of the arc. The die can be suitable for cold roll forming of low-temperature corrosion-resisting steel plates with different curvature radiuses, and comprehensive data are provided for manufacturing and designing of the steel plates.

Description

Technical Field

[0001] The invention belongs to the technical field of cold-bending steel plates, and in particular relates to a low-temperature corrosion-resistant steel plate cold-bending mold. Background Art

[0002] The preparation and design process of low-temperature corrosion-resistant steel usually includes: chemical composition design, smelting, casting, rolling, cold bending, machining, surface treatment, welding, corrosion resistance and application. In the cold bending process, choosing the right bending radius and bending speed is the key. Too small a bending radius or too fast a bending speed may cause cracks or deformation on the surface of the steel plate. By optimizing these parameters, stress concentration during the cold bending process can be reduced, thereby improving the corrosion resistance of the steel plate. In the prior art, a set of cold bending molds can usually only bend steel plates with one bending radius. In the design process of the steel plate, multiple molds are usually required to obtain reliable data, which increases the design cost. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a low-temperature corrosion-resistant steel plate cold bending forming die, which can be suitable for cold bending forming of low-temperature corrosion-resistant steel plates with different curvature radii, and provide more comprehensive data for the manufacturing design of steel plates.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses a low-temperature corrosion-resistant steel plate cold-bending forming mold, comprising a support plate, a cold-bending die assembly installed on the lower side of the support plate, and a cold-bending punch assembly installed on the upper side of the support plate, wherein the support plate is vertically installed on the mold platform, the cold-bending die assembly comprises an outer arc support roller extending along the normal direction of the support plate, the outer arc support roller is connected to the support plate through a locking adjustment assembly, and a plurality of the outer arc support rollers are distributed on the support plate in an arc shape; the cold-bending punch assembly comprises an inner arc main stamping roller extending along the normal direction of the support plate, the inner arc main stamping roller is rotatably connected to a main telescopic bracket, the main telescopic bracket is connected to the output shaft of a rotation driving device, the rotation driving device is installed on the support plate, the rotation driving device can drive the main telescopic bracket to perform arc reciprocating motion with the center of the output shaft as the center of the circle, and the main telescopic bracket can be telescoped radially along the arc.

[0006] Furthermore, the locking adjustment assembly includes a slide groove with a U-shaped cross-section and a slider slidably installed in the slide groove, the slide groove extends longitudinally, a longitudinal guide groove is provided on the side wall of the slide groove, a longitudinal guide rod cooperating with the longitudinal guide groove is installed on the slider, and the longitudinal guide rod is fixed to the slide groove by a locking piece; a vertical guide rod is fixed to the back side of the slide groove, the vertical guide rod is slidably arranged in a vertical guide groove provided on the support plate, and the vertical guide rod is fixed to the support plate by a locking piece.

[0007] Furthermore, the outer arc support roller includes a support shaft and a support roller rotatably mounted on the outside of the support shaft, one end of the support shaft is fixedly connected to the slider, and the other end of the support shaft extends outward along the normal direction of the support plate.

[0008] Furthermore, the outer arc support roller also includes a tail stage fixed at the tail end of the support shaft, a limit stage fixed in the middle of the support shaft, and a slide table slidably arranged at the front end of the support shaft, the limit grooves on the limit stage are evenly distributed along the circumferential direction, a support block is radially slidably arranged in the limit groove, an arc-shaped rubber plate is connected to the outer side of the support block, inner conical surfaces are formed at both ends of the support block, outer conical surfaces are correspondingly formed on the end of the tail stage and the slide table facing the support block, and a linear displacement mechanism for pushing the slide table to slide is installed at the front end of the support shaft; the outer side surface of the arc-shaped rubber plate contacts the inner wall of the support roller.

[0009] Furthermore, the linear displacement mechanism includes a telescopic device fixed at the center of the support shaft, the output end of the telescopic device is connected to the pressure cap, the inner end of the pressure cap is in contact with the slide, and a spring is installed between the support block and the tail stage.

[0010] Furthermore, a movement detection component is installed on the support plate, and the movement detection component and the telescopic device are both connected to a controller. When the movement detection component detects that the steel plate is moving, the linear displacement mechanism drives the slide, and the slide acts on the support block, and the support block presses the arc-shaped rubber plate against the inner wall of the support roller.

[0011] Furthermore, the movement detection assembly includes a detection plate, a positioning plate, a pressure sensor installed between the detection plate and the positioning plate, and an elastic recovery device. One end of the detection plate is hinged to the support plate through a pin shaft, and the lower side of the detection plate is in contact with the end of the steel plate.

[0012] Furthermore, a plurality of limiting teeth are formed on the lower side of the detection plate, and the limiting teeth include an inclined surface and a vertical surface, and the inclined surface is formed on the side away from the pin shaft.

[0013] Furthermore, a secondary telescopic bracket is rotatably connected to the output shaft, a hydraulic cylinder is installed between the main telescopic bracket and the secondary telescopic bracket, and an inner arc secondary stamping roller is connected to the secondary telescopic bracket.

[0014] Furthermore, the main telescopic bracket and the auxiliary telescopic bracket have the same structure. The main telescopic bracket includes an outer bracket, one end of which is connected to the output shaft, and the other end of the outer bracket is slidably matched with an inner bracket. A hydraulic cylinder is connected between the outer bracket and the inner bracket, and the inner arc main stamping roller is rotatably installed on the inner bracket.

[0015] The beneficial effects of the present invention are:

[0016] The present invention discloses a cold-bending forming die for low-temperature corrosion-resistant steel plates. A plurality of groups of outer arc support rollers are arranged on a support plate. Each group of outer arc support rollers can change positions in the plane where the support plate is located, thereby forming a combination of concave die components corresponding to different curvatures. After being matched with a cold-bending convex die component, the die of the present invention can be suitable for cold-bending forming of low-temperature corrosion-resistant steel plates with different curvature radii, thereby providing more comprehensive data for the manufacturing design of steel plates.

[0017] In the device disclosed in the present invention, the rolling curvature of the inner arc main stamping roller is changed by a telescopic bracket. When the telescopic bracket is extended, it can adapt to the cold bending forming processing of small-curvature steel plates. When the telescopic bracket is reduced, the bending curvature becomes larger, thereby adapting to the cold bending forming processing of large-curvature steel plates.

[0018] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a structural schematic diagram of the molding die of the present invention;

[0021] Figure 2 It is a front view of the molding die of the present invention;

[0022] Figure 3 is a structural schematic diagram of a locking and adjusting assembly;

[0023] Figure 4 This is the exploded diagram of the outer arc support roller;

[0024] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 is a cross-sectional view of an outer arc support roller;

[0026] Figure 7 It is a schematic diagram of the structure of the inner arc auxiliary stamping roller.

[0027] The markings in the accompanying drawings are as follows: support plate 1, mold platform 2, outer arc support roller 3, locking adjustment assembly 4, inner arc main stamping roller 5, main telescopic bracket 6, rotation drive device 7, output shaft 8, slide groove 9, slider 10, longitudinal guide groove 11, longitudinal guide rod 12, vertical guide rod 13, vertical guide groove 14, support shaft 15, support roller 16, tail platform 17, limit platform 18, slide 19, limit groove 20, support block 21, arc rubber plate 22, inner cone 23, outer cone 24, telescopic device 25, pressure cap 26, spring 27, detection plate 28, positioning plate 29, pressure sensor 30, elastic recovery device 31, pin 32, limit tooth 33, auxiliary telescopic bracket 34, hydraulic cylinder 35, inner arc auxiliary stamping roller 36, outer bracket 37, inner bracket 38. DETAILED DESCRIPTION

[0028] like Figures 1 to 7 As shown, a low-temperature corrosion-resistant steel plate cold bending forming mold disclosed in the present invention includes a support plate 1, a cold bending die assembly installed on the lower side of the support plate 1, and a cold bending convex assembly installed on the upper side of the support plate 1. The support plate 1 is located in a vertical plane perpendicular to the mold platform 2. The support plate 1 is vertically installed on the mold platform 2. The cold bending convex assembly is located on the upper side of the cold bending die assembly. The combination of the two is used to cold bend the steel plate. The structure of the steel plate after forming in the embodiment of the present invention is an upward concave arc steel plate, which can be understood to be a downward concave shape.

[0029] Specifically, the cold bending die assembly of the present invention includes 8 groups of outer arc support rollers 3 extending along the normal direction of the support plate 1. The arc support rollers can rotate around their own axes. The outer arc support rollers 3 are connected to the support plate 1 through the locking adjustment assembly 4. The 8 groups of outer arc support rollers 3 are distributed on the support plate 1 in an arc shape; the 8 groups of outer arc support rollers 3 are used to support the lower surface of the steel plate after being combined. Since the steel plate itself has a certain rigidity, even if there are gaps between the 8 groups of outer arc support rollers 3, it will not affect the overall bending curvature of the steel plate, which should be understood by those skilled in the art.

[0030] Furthermore, the cold bending punch assembly disclosed in the present invention includes an inner arc main stamping roller 5 extending along the normal direction of the support plate 1. The diameter of the inner arc main stamping roller 5 is larger than the diameter of the outer arc support roller 3, and is larger than the gap between two adjacent outer arc support rollers 3, thereby ensuring the accuracy of the steel plate after cold bending and improving the forming efficiency. The inner arc main stamping roller 5 is rotatably connected to the main telescopic bracket 6, and the main telescopic bracket 6 is connected to the output shaft 8 of the rotation drive device 7. The rotation drive device 7 is installed on the support plate 1. The rotation drive device 7 can drive the main telescopic bracket 6 to perform circular arc reciprocating motion with the center of the output shaft 8 as the center of the circle. The outer inner arc main stamping roller 5 is used to cooperate with the upper surface of the steel plate. The 8 groups of outer arc support rollers 3 are used to support the lower surface of the steel plate after combination. The combination of the two is used to perform cold bending forming on the steel plate.

[0031] The main telescopic bracket 6 disclosed in the present invention can be telescopic along the radial direction of the arc. The rolling arc change of the inner arc main punching roller 5 is realized by the telescopic bracket. When the telescopic bracket is extended, it can adapt to the cold bending forming processing of the small arc steel plate. When the telescopic bracket is reduced, the bending arc becomes larger, thereby adapting to the cold bending forming processing of the large arc steel plate.

[0032] In this embodiment, the locking and adjusting assembly 4 includes a slide groove 9 with a U-shaped cross section, and a slider 10 slidably installed in the slide groove 9. The slider 10 is in a square shape and can slide along the longitudinal direction under the limiting action of the slide groove 9. The slide groove 9 extends along the longitudinal direction. A longitudinal guide groove 11 is provided on the side wall of the slide groove 9. The two ends of the longitudinal guide groove 11 are not penetrated. A longitudinal guide rod 12 cooperating with the longitudinal guide groove 11 is installed on the slider 10. The diameter of the longitudinal guide rod 12 is equivalent to the width of the longitudinal guide groove 11. The longitudinal guide rod 12 is fixed to the slide groove 9 by a locking member; the locking member adopts a nut. After the position of the slider 10 is fixed, the longitudinal guide rod 12 and the slide groove 9 are locked by the nut. Corresponding to the longitudinal direction, a vertical guide rod 13 is fixed on the back side of the slide groove 9 vertically to the slide groove 9. The vertical guide rod 13 is slidably arranged in a vertical guide groove 14 provided on the support plate 1. The vertical guide rod 13 is fixed to the support plate 1 by a locking member. Through the combination of longitudinal and vertical directions, the position change of the slider 10 on the vertical plane is realized, and the outer arc support roller 3 can be adjusted at different positions.

[0033] In this embodiment, in order to reduce the resistance between the outer arc support roller 3 and the steel plate, the forming of the steel plate is smoother. The outer arc support roller 3 disclosed in the present invention adopts a rolling fit. Specifically, the outer arc support roller 3 includes a support shaft 15, a support roller 16 rotatably mounted on the outside of the support shaft 15, one end of the support shaft 15 is fixedly connected to the slider 10, and the other end of the support shaft 15 extends outward along the normal direction of the support plate 1. The support roller 16 can rotate around its axis relative to the support shaft 15, thereby achieving rolling fit. The device is simple and convenient and has high stability.

[0034] In this embodiment, the outer arc support roller 3 also includes a tail stage 17 fixed at the tail end of the support shaft 15, a limit stage 18 fixed at the middle of the support shaft 15, and a slide 19 slidably arranged at the front end of the support shaft 15. The limit stage 18 has limit grooves 20 evenly distributed along the circumference, and a support block 21 is radially slidably arranged in the limit groove 20. Under the action of the limit groove 20, the support block 21 can only slide radially. An arc-shaped rubber plate 22 is connected to the outside of the support block 21, and inner conical surfaces 23 are formed at both ends of the support block 21. The tail stage 17 and the slide 19 have outer conical surfaces 24 correspondingly formed at one end facing the support block 21. A linear displacement mechanism for pushing the slide 19 to slide is installed at the front end of the support shaft 15; the outer side surface of the arc-shaped rubber plate 22 contacts the inner wall of the support roller 16. When the linear displacement mechanism drives the slide 19 to move toward the tail stage 17, the outer conical surface 24 on the slide 19 can act on the inner conical surface 23 of the support block 21. The cooperation between the two can drive the support block 21 to move radially outward. After the support block 21 moves, the arc-shaped rubber sheet 22 can be pressed against the inner wall of the support roller 16 to increase the damping for the rotation of the support roller 16. The advantage of this method is that it can reduce the tangential transmission of the steel plate during forming, thereby increasing the stability during forming.

[0035] In this embodiment, the linear displacement mechanism includes a telescopic device 25 fixed at the center of the support shaft 15, the output end of the telescopic device 25 is connected to the pressure cap 26, the inner end of the pressure cap 26 is in contact with the slide 19, and a spring 27 is installed between the support block 21 and the tail stage 17. The telescopic device 25 uses a hydraulic cylinder 35, and the spring 27 is used to provide elastic restoring force for the support block 21.

[0036] In this embodiment, a movement detection component is installed on the support plate 1, and the movement detection component and the telescopic device 25 are both connected to the controller. When the movement detection component detects that the steel plate is moving, the linear displacement mechanism drives the slide 19, and the slide 19 acts on the support block 21, and the support block 21 presses the arc rubber plate 22 against the inner wall of the support roller 16. When the steel plate moves along the left side during the forming process, different numbers of outer arc support rollers 3 are selected to act according to the size of the movement force. The greater the movement force, the more the number of outer arc support rollers 3 acts, the greater the damping of the steel plate movement, and the more stable the forming process. When the movement does not occur, the damping of the outer arc support roller 3 can be released, thereby improving the forming efficiency.

[0037] In this embodiment, the movement detection assembly includes a detection plate 28, a positioning plate 29, a pressure sensor 30 installed between the detection plate 28 and the positioning plate 29, and an elastic recovery device 31. One end of the detection plate 28 is hinged to the support plate 1 through a pin 32, and the lower side of the detection plate 28 is in contact with the end of the steel plate. Through the pressure sensor 30, the damping force of the transmission can be connected.

[0038] In this embodiment, a plurality of limiting teeth 33 are formed on the lower side of the detection plate 28. The limiting teeth 33 include an inclined surface and a vertical surface. The inclined surface is formed on the side away from the pin shaft 32. By setting the vertical surface, the end of the steel plate can be limited. Under the guiding effect of the inclined surface, it is more conducive to the end of the steel plate to be clamped between two adjacent limiting teeth 33, thereby improving the stability of the drifting force detection.

[0039] In this embodiment, the output shaft 8 is rotatably connected to a secondary telescopic bracket 34, a hydraulic cylinder 35 is installed between the main telescopic bracket 6 and the secondary telescopic bracket 34, and an inner arc secondary stamping roller 36 is connected to the secondary telescopic bracket 34. The inner arc secondary stamping roller 36 can be combined with the inner arc main stamping roller 5 to perform cold bending forming on the steel plate, which can greatly improve the forming efficiency. The inner arc secondary stamping roller 36 of the present invention is divided into two groups, and the device structure is compact. One set of rotating drive device 7 can be used for the use of three groups of stamping rollers, so that the bending curvature of the steel plate can be guaranteed.

[0040] In this embodiment, the main telescopic bracket 6 and the auxiliary telescopic bracket 34 have the same structure. The main telescopic bracket 6 includes an outer bracket 37, one end of the outer bracket 37 is connected to the output shaft 8, and the other end of the outer bracket 37 is slidably matched with the inner bracket 38. A hydraulic cylinder 35 is connected between the outer bracket 37 and the inner bracket 38, and the inner arc main stamping roller 5 is rotatably mounted on the inner bracket 38. By controlling the extension and retraction of the inner bracket 38 by the hydraulic cylinder 35, the extension and retraction length of the main telescopic bracket 6 can be conveniently controlled without affecting the stamping process of the inner arc main stamping roller 5.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A low-temperature corrosion-resistant steel plate cold bending forming die, comprising a support plate, a cold bending die assembly installed on the lower side of the support plate, and a cold bending convex die assembly installed on the upper side of the support plate, characterized in that: The support plate is vertically installed on the mold platform, and the cold-bending die assembly includes an outer arc support roller extending along the normal direction of the support plate, and the outer arc support roller is connected to the support plate through a locking adjustment assembly, and a plurality of the outer arc support rollers are distributed in an arc shape on the support plate; the cold-bending punch assembly includes an inner arc main stamping roller extending along the normal direction of the support plate, and the inner arc main stamping roller is rotatably connected to the main telescopic bracket, and the main telescopic bracket is connected to the output shaft of the rotation driving device, and the rotation driving device is installed on the support plate, and the rotation driving device can drive the main telescopic bracket to perform arc reciprocating motion with the center of the output shaft as the center of the circle, and the main telescopic bracket can be telescoped radially along the arc.

2. The low temperature corrosion resistant steel plate cold bending forming die according to claim 1, characterized in that: The locking adjustment assembly includes a slide groove with a U-shaped cross-section and a slider slidably installed in the slide groove, the slide groove extends longitudinally, a longitudinal guide groove is provided on the side wall of the slide groove, a longitudinal guide rod matching the longitudinal guide groove is installed on the slider, and the longitudinal guide rod is fixed to the slide groove by a locking piece; a vertical guide rod is fixed to the back side of the slide groove, the vertical guide rod is slidably set in a vertical guide groove provided on a support plate, and the vertical guide rod is fixed to the support plate by a locking piece.

3. The low temperature corrosion resistant steel plate cold bending forming die according to claim 2, characterized in that: The outer arc support roller includes a support shaft and a support roller rotatably mounted on the outside of the support shaft. One end of the support shaft is fixedly connected to the slider, and the other end of the support shaft extends outward along the normal direction of the support plate.

4. The low temperature corrosion resistant steel plate cold bending forming die according to claim 3, characterized in that: The outer arc support roller also includes a tail table fixed at the tail end of the support shaft, a limit table fixed in the middle of the support shaft, and a slide table slidably arranged at the front end of the support shaft, the limit grooves on the limit table are evenly distributed along the circumference, and a support block is radially slidably arranged in the limit groove, the outer side of the support block is connected to an arc-shaped rubber plate, both ends of the support block are formed with inner conical surfaces, and the tail table and the slide table are correspondingly formed with outer conical surfaces at one end facing the support block, and a linear displacement mechanism for pushing the slide table to slide is installed at the front end of the support shaft; the outer side surface of the arc-shaped rubber plate is in contact with the inner wall of the support roller.

5. A motorcycle frame fatigue testing device according to claim 4, characterized in that: The linear displacement mechanism comprises a telescopic device fixed at the center of the support shaft, the output end of the telescopic device is connected to the pressure cap, the inner end of the pressure cap is in contact with the slide, and a spring is installed between the support block and the tail stage.

6. The low temperature corrosion resistant steel plate cold bending forming die according to claim 5, characterized in that: A movement detection component is installed on the support plate, and the movement detection component and the telescopic device are both connected to a controller. When the movement detection component detects that the steel plate is moving, the linear displacement mechanism drives the slide, and the slide acts on the support block, and the support block presses the arc-shaped rubber plate against the inner wall of the support roller.

7. The low temperature corrosion resistant steel plate cold bending forming die according to claim 6, characterized in that: The movement detection assembly includes a detection plate, a positioning plate, a pressure sensor installed between the detection plate and the positioning plate, and an elastic recovery device. One end of the detection plate is hinged to the support plate through a pin shaft, and the lower side of the detection plate is in contact with the end of the steel plate.

8. The low temperature corrosion resistant steel plate cold bending forming die according to claim 7, characterized in that: A plurality of limiting teeth are formed on the lower side of the detection plate. The limiting teeth include an inclined surface and a vertical surface. The inclined surface is formed on the side away from the pin shaft.

9. A low temperature corrosion resistant steel plate cold bending forming die according to any one of claims 1 to 8, characterized in that: The output shaft is rotatably connected with a secondary telescopic bracket, a hydraulic cylinder is installed between the main telescopic bracket and the secondary telescopic bracket, and the secondary telescopic bracket is connected with an inner arc secondary stamping roller.

10. The low temperature corrosion resistant steel plate cold bending forming die according to claim 9, characterized in that: The main telescopic bracket and the auxiliary telescopic bracket have the same structure. The main telescopic bracket includes an outer bracket, one end of which is connected to the output shaft, and the other end of the outer bracket is slidably matched with an inner bracket. A hydraulic cylinder is connected between the outer bracket and the inner bracket, and the inner arc main stamping roller is rotatably installed on the inner bracket.

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