Profile stretch bending machine

Abstract

The utility model discloses a sectional material stretch bending machine, and relates to the technical field of sectional material stretch bending. The sectional material stretch bending machine comprises a working platform, a pressing plate side pushing device and a stretch bending assembly. The pressing plate side pushing device is arranged on the working platform; the stretch bending assembly is installed on the working platform through a pressing plate side pushing device and comprises an arc-shaped steel plate and an inner core, and the arc-shaped steel plate is provided with an outer cambered surface with a preset curvature radius; the inner core is provided with an inner arc side with the same preset curvature radius as the outer arc face and an outer arc side opposite to the inner arc side, the inner arc side is fixedly arranged on the outer arc face, and the outer arc side is used for bending a profile to be machined. The profile stretch bender has the advantages of being simple in structure and low in manufacturing cost, and polyurethane filler is omitted. On one hand, the angle change of the sectional material caused by insufficient rigidity of polyurethane is avoided, so that the forming precision of the sectional material is improved; and on the other hand, the preparation work of polyurethane filling is omitted, the preparation time before forming is shortened, and then the forming efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to profile stretch bending technical field, especially a kind of profile stretch bending machine. BACKGROUND

[0002] Profile stretch bending machine is a kind of process by exerting tensile force, so that metal profile (such as aluminum alloy, steel, etc.) plastic deformation, thereby bending into the shape required it. Profile stretch bending machine is widely used in aerospace, rail transportation, civilian car, building and other fields.

[0003] For aerospace and other high-precision products, usually configured with overall type profile stretch bending machine is bent and formed. Profile stretch bending machine with overall type tire has higher strength and precision, can realize higher forming efficiency, help to meet the requirements of high-precision products. However, the manufacturing cost of overall type tire is higher, and processing process depends on large equipment, usually need to be completed by overall machine processing, leading to increased production cost, longer period.

[0004] In civilian car and construction industry, usually equipped with profile stretch bending machine with arc plate. Arc plate structure is simple, and cost is lower, but in profile stretch bending process needs to fill polyurethane, thereby leading to profile forming efficiency, and forming precision is poor.

[0005] In summary, the existing profile stretch bending machine is difficult to achieve good balance between cost, forming efficiency and precision. Therefore, there is an urgent need for a profile stretch bending machine that can reduce manufacturing cost, improve forming efficiency and precision. INVENTION CONTENTS

[0006] To solve the above technical problems, the purpose of the utility model is to provide a kind of profile stretch bending machine, to reduce manufacturing cost, while improving profile forming efficiency and precision.

[0007] The technical scheme provided by the utility model is as follows:

[0008] A kind of profile stretch bending machine, comprising:

[0009] Workbench;

[0010] Pressing plate side pushing device, set on the workbench;

[0011] Stretch bending assembly, by the pressing plate side pushing device installation on the workbench, the stretch bending assembly includes arc steel plate and inner core, the arc steel plate has the outer arc surface of preset curvature radius;The inner core has the inner arc side with the same preset curvature radius of outer arc surface and the outer arc side opposite to the inner arc side, the inner arc side is fixedly arranged on the outer arc surface, and the outer arc side is used to bend the profile to be processed.

[0012] Further, the height of the inner core is less than the height of the arc-shaped steel plate, the length of the inner core is equal to the length of the arc-shaped steel plate, and the inner-arc side of the inner core is fixedly arranged at the middle position of the outer-arc surface of the arc-shaped steel plate in the height direction.

[0013] Further, the inner core comprises:

[0014] a first arc-shaped support plate, the inner side of which is fixedly arranged on the outer-arc surface;

[0015] a second arc-shaped support plate, the inner side of which is fixedly arranged on the outer-arc surface and is arranged in parallel with the first arc-shaped support plate;

[0016] an arc-shaped connecting plate, one side of which is connected with the outer side of the first arc-shaped support plate, and the other side of which is connected with the outer side of the second arc-shaped support plate;

[0017] wherein the inner side of the first arc-shaped support plate and the second arc-shaped support plate is the inner-arc side of the inner core, and the outer shape surface of the arc-shaped connecting plate is the outer-arc side of the inner core.

[0018] Further, the outer-arc surface, the first arc-shaped support plate, the arc-shaped connecting plate and the second arc-shaped support plate jointly form a containing cavity, and a support block is arranged in the containing cavity.

[0019] Further, the outer sides of the first arc-shaped support plate and the second arc-shaped support plate are respectively connected with the opposite sides of the arc-shaped connecting plate through welding.

[0020] The outer sides of the first arc-shaped support plate and the second arc-shaped support plate are provided with welding grooves.

[0021] Further, the specification of the welding groove is 4mm*4mm, and the outer sides of the first arc-shaped support plate and the second arc-shaped support plate are respectively connected with the opposite sides of the arc-shaped connecting plate through argon arc welding.

[0022] Further, the profile draw bending machine is used for processing a to-be-processed profile with an L-shaped cross section, the to-be-processed profile comprises a first part and a second part arranged vertically, the first part is placed on the outer side of the arc-shaped connecting plate, and the second part is placed above the first arc-shaped support plate.

[0023] Further, the profile draw bending machine further comprises a positioning block arranged on the first arc-shaped support plate and used for limiting the to-be-processed profile.

[0024] Further, the profile draw bending machine further comprises a flanging baffle used for being movably arranged on the top of the to-be-processed profile.

[0025] Further, the profile stretch-bending machine further comprises a reinforcing rib, which is arranged on the outer arc surface of the arc-shaped steel plate and above the flanging baffle.

[0026] Compared with the prior art, the profile stretch-bending machine provided in the embodiments of the present application has at least the following technical effects:

[0027] The profile stretch-bending machine comprises a working platform, a pressing plate side pushing device arranged on the working platform, and a stretch-bending assembly installed on the working platform through the pressing plate side pushing device. The stretch-bending assembly comprises an arc-shaped steel plate and an inner core. The arc-shaped steel plate has an outer arc surface with a preset curvature radius. The inner core has an inner arc side with the same preset curvature radius as the outer arc surface and an outer arc side arranged opposite to the inner arc side. The inner arc side is fixed on the outer arc surface, and the outer arc side is used for bending a profile to be processed. The profile stretch-bending machine has the characteristics of simple structure and low manufacturing cost, and the use of polyurethane filler is cancelled. On the one hand, the change of the profile angle caused by the insufficient rigidity of the polyurethane is avoided, thereby improving the precision of the profile forming. On the other hand, the preparation work of the polyurethane filling is saved, the preparation time before forming is reduced, and the forming efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0029] Figure 1 It is an overall structural schematic diagram of the profile stretch-bending machine.

[0030] Figure 2 It is a structural schematic diagram of the profile stretch-bending machine. Figure 1

[0031] It is a structural schematic diagram of the profile stretch-bending machine. Figure 3 Figure 1 It is a structural schematic diagram of the profile stretch-bending machine.

[0032] Figure 4 It is a structural schematic diagram of the profile stretch-bending machine.

[0033] Figure 5 It is a sectional structural schematic diagram of the profile to be processed.

[0034] Reference signs:

[0035] ​1, arc steel plate; 2, inner core; 21, first arc-shaped support plate; 22, second arc-shaped support plate; 23, arc-shaped connecting plate; 24, accommodating cavity; 3, profile to be processed; 31, first part; 32, second part; 4, workbench; 5, pressing plate side pushing device; 51, pressing plate; 52, side pushing piece; 6, flanging baffle; 7, reinforcing rib. DETAILED DESCRIPTION

[0036] In order for those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of", "several" is two or more than two, unless otherwise explicitly specified.

[0040] It should be understood that the structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the utility model, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model.

[0041] Profile stretch bending machine is widely used in aerospace field. Specifically, in aircraft manufacturing, profile stretch bending machine is mainly used for producing key components such as frame ribs, fuselage front and rear sections, engine short warehouses, etc. These components not only affect the aerodynamic shape of the aircraft, but also have very high requirements for shape accuracy. In rocket manufacturing, profile stretch bending machine process is used to manufacture key components such as upper and lower end frames of cabin section and transition ring. These components bear a lot of pressure and have very strict accuracy requirements, especially when they are connected into a whole circle by bolts, the assembly accuracy is particularly important.

[0042] In the field of civil automobile manufacturing, profile stretch bending machine technology is widely used in the bending of hollow aluminum profiles such as car body structure and bumper. Through this process, the impact resistance of the car body can be maintained while effectively reducing the weight of the car body, thereby reducing the use cost of the vehicle.

[0043] Different fields of profile stretch bending machines are different, mainly in terms of forming accuracy, efficiency and cost.

[0044] For high-precision products such as aerospace, profile stretch bending machines equipped with integral dies are usually used for stretch bending forming. Profile stretch bending machines equipped with integral dies have high strength and accuracy, can achieve high forming efficiency, and help meet the requirements of high-precision products. However, the manufacturing cost of integral dies is high, and the processing process depends on large equipment, which usually needs to be completed by integral machining, resulting in increased production cost and longer construction period.

[0045] In the civil automobile and construction industry, profile stretch bending machines equipped with arc plates are usually used. Arc plate structure is simple and low cost, but it needs to be filled with polyurethane during profile stretch bending process, which leads to low profile forming efficiency and poor forming accuracy.

[0046] In summary, considering the manufacturing cost of profile stretch bending machine, profile forming efficiency and accuracy, the utility model provides a profile stretch bending machine, which aims to reduce the manufacturing cost while improving the profile forming efficiency and accuracy.

[0047] Please refer to the attached drawings Figure 1 to the attached drawings Figure 3The utility model discloses an embodiment provides a section bar draw bending machine, including work platform 4, the pressing plate side pusher 5 of setting on work platform 4 and the draw bending subassembly of installing on work platform 4 through pressing plate side pusher 5. Draw bending subassembly includes arc steel sheet 1 and inner core 2, and arc steel sheet 1 has the outer arc surface of preset curvature radius, and inner core 2 has the inner arc side with the same preset curvature radius of outer arc surface and the outer arc side opposite to the inner arc side, and the inner arc side is fixed on the outer arc surface, and the outer arc side is used to bend the section bar 3 to be processed. The inner arc side of inner core 2 is same with the preset curvature radius of arc steel sheet 1 outer arc surface, to ensure that the inner arc side can be closely attached to the outer arc surface of arc steel sheet 1. In actual use, the section bar 3 to be processed is placed on the outer arc side of inner core 2, and then by exerting tension, the section bar 3 to be processed is gradually bent along the outer arc side of inner core 2, and finally is shaped. The preset curvature radius of arc steel sheet 1 outer arc surface is adaptively selected according to the requirement of section bar 3 to be processed. In one specific embodiment, the preset curvature radius of arc steel sheet 1 outer arc surface is R2134mm.

[0048] In the embodiment, the section bar draw bending machine includes work platform 4, pressing plate side pusher 5 arranged on work platform 4, and draw bending subassembly installed on work platform 4 through pressing plate side pusher 5. The draw bending subassembly includes arc steel sheet 1 and inner core 2, and arc steel sheet 1 has an outer arc surface with a preset curvature radius; inner core 2 has an inner arc side with the same preset curvature radius as the outer arc surface and an outer arc side arranged opposite to the inner arc side, and the inner arc side is fixed on the outer arc surface, and the outer arc side is used to bend the section bar 3 to be processed. The section bar draw bending machine has the characteristics of simple structure and low manufacturing cost, and cancels the use of polyurethane filler. On the one hand, it avoids the change of section bar angle caused by the insufficient rigidity of polyurethane, thereby improving the precision of section bar forming; on the other hand, it saves the preparation work of polyurethane filling, reduces the preparation time before forming, and thereby improves the forming efficiency.

[0049] It needs to be further explained that the pressing plate side pusher 5 is used to fix the arc steel sheet 1 on the work platform 4, and the pressing plate side pusher 5 includes a pressing plate 51 and a side pusher 52. The pressing plate 51 abuts against the top of the arc steel sheet 1; the side pusher 52 is used to adjust the arc steel sheet 1, so that the outer arc surface of the arc steel sheet 1 reaches the preset curvature radius. Specifically, the pressing plate 51 is provided with an adjusting hole, and a bolt for fastening the position of the pressing plate 51 is installed in the adjusting hole. By adjusting the bolt, the position of the pressing plate 51 can be flexibly adjusted according to the preset curvature radius requirement of the outer arc surface of the arc steel sheet 1, so as to ensure that the pressing plate 51 can be closely abutted against the top of the arc steel sheet 1 with different curvature radii. The side pusher 52 includes a thrust surface and a driving member, wherein the thrust surface is used to abut against the inner arc surface of the arc steel sheet 1. The driving member is used to push the thrust surface to move. The driving member can adopt an adjustable bolt structure, and by adjusting the position and pressure of the bolt, the movement of the thrust surface is controlled, so that the outer arc surface of the arc steel sheet 1 reaches the preset curvature radius.

[0050] In some optional embodiments, the number of the pressing plate side pushing devices 5 is multiple. For example, the number of the pressing plate side pushing devices 5 is 10, and the interval between two adjacent pressing plate side pushing devices 5 is 500 mm.

[0051] In some optional embodiments, the height of the inner core 2 is less than the height of the arc-shaped steel plate 1, the length of the inner core 2 is equal to the length of the arc-shaped steel plate 1, and the inner arc side of the inner core 2 is fixedly arranged at the middle position of the height direction of the outer arc surface of the arc-shaped steel plate 1.

[0052] In some optional embodiments, the inner core 2 comprises a first arc-shaped support plate 21, a second arc-shaped support plate 22, and an arc-shaped connecting plate 23. The inner side of the first arc-shaped support plate 21 is fixedly arranged on the outer arc surface; the inner side of the second arc-shaped support plate 22 is fixedly arranged on the outer arc surface and is arranged in parallel with the first arc-shaped support plate 21; one side of the arc-shaped connecting plate 23 is connected with the outer side of the first arc-shaped support plate 21, and the other side is connected with the outer side of the second arc-shaped support plate 22; wherein, the inner sides of the first arc-shaped support plate 21 and the second arc-shaped support plate are the inner arc side of the inner core 2, and the outer shape surface of the arc-shaped connecting plate 23 is the outer arc side of the inner core 2. The preset curvature radius of the arc-shaped connecting plate 23 is R2134 mm. The first arc-shaped support plate 21 and the second arc-shaped support plate 22 are respectively formed by butt welding a plurality of plane arc plates, and usually 7 plane arc plates with a thickness of 10 mm are butt welded. The outer arc radius of each plane arc plate is R2225 mm, the inner arc radius is R2134 mm, and the width is 91 mm.

[0053] In some optional embodiments, the outer arc surface, the first arc-shaped support plate 21, the arc-shaped connecting plate 23, and the second arc-shaped support plate 22 jointly form a containing cavity 24, and a support block is arranged in the containing cavity 24. The support block is an arc-shaped support block, the outer arc radius of which is the same as the preset curvature radius of the inner arc surface of the arc-shaped connecting plate 23, and the inner arc radius of which is the same as the preset curvature radius of the outer arc surface of the arc-shaped steel plate 1. For example, the outer arc radius of the arc-shaped support block is R2225 mm, the inner arc radius is R2134 mm, and the height is 91 mm.

[0054] In some optional embodiments, the outer sides of the first arc-shaped support plate 21 and the second arc-shaped support plate 22 are respectively connected with the opposite two sides of the arc-shaped connecting plate 23 by welding; and the outer sides of the first arc-shaped support plate 21 and the second arc-shaped support plate 22 are respectively provided with a welding bevel.

[0055] In some optional embodiments, the specification of the welding bevel is 4 mm x 4 mm, forming a pyramid-shaped groove, which is helpful for the full penetration and fusion of the welding material, thereby improving the tightness and strength of the welding joint. The outer sides of the first arc-shaped support plate 21 and the second arc-shaped support plate 22 are respectively connected with the opposite two sides of the arc-shaped connecting plate 23 by argon arc welding.

[0056] Please refer to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 As shown in the accompanying drawings, in some alternative embodiments, the profile stretch bending machine is used to process a profile to be processed 3 with an L-shaped cross section, which includes a first part 31 and a second part 32 arranged vertically, the first part 31 is placed outside the arc-shaped connecting plate 23, and the second part 32 is placed above the first arc-shaped support plate 21. In a specific embodiment, the length of the first part 31 in the vertical direction is 96 mm, and the thickness is 10 mm, and the length of the second part 32 in the horizontal direction is 100 mm, and the thickness is 6 mm. The profile to be processed 3 can be an aluminum alloy profile, and the overall length is consistent with the arc-shaped steel plate 1 and the inner core 2.

[0057] In some alternative embodiments, the profile stretch bending machine further comprises positioning blocks arranged on the first arc-shaped support plate 21 for limiting the profile to be processed 3. Among them, the number of positioning blocks is multiple, and the multiple positioning blocks are uniformly distributed, and the size of each positioning block is but not limited to 30 mm (length) x 100 mm (width) x 6.5 mm (thickness).

[0058] In some alternative embodiments, the profile stretch bending machine further comprises a flanging baffle 6 movably arranged on the top of the profile to be processed 3. Among them, the number of flanging baffles 6 is multiple (for example, 7), and the inner arc radius of each flanging baffle 6 corresponds to the same pre-set curvature radius of the outer arc surface of the arc-shaped steel plate 1 (for example, R2134 mm). Specifically, when the profile to be processed 3 is wrapped and bent along the stretch bending die, the flanging baffle 6 will be gradually placed on the top of the profile to be processed 3 while the profile to be processed 3 is bent, thereby effectively limiting the profile to be processed 3 from being bent. The phenomenon of edge lifting during the bending process. The flanging baffle 6 is movably arranged on the top of the profile to be processed 3, which is convenient for installation on the one hand, and on the other hand, after the profile is bent, the flanging baffle 6 can be quickly taken off, so that the profile can be smoothly demolded. Exemplarily, the outer arc size of each flanging baffle 6 is R2306 mm, and the inner arc size is R2134 mm. It should be further pointed out that the lower surface of the flanging baffle 6 is polished to be smooth and flat. At the same time, the outer arc part of the flanging baffle 6 is polished to form a chamfer, and the size of the chamfer can be 6 mm x 3 mm, but it is not limited thereto.

[0059] In some optional embodiments, the profile stretch-bending machine further comprises reinforcing ribs 7, which are arranged on the outer arc surface of the arc-shaped steel plate 1 and above the flanging baffle 6. The reinforcing ribs 7 are designed to support the flanging baffle 6 and prevent the flanging baffle 6 from being upwarped during the stretch-bending process. In a specific embodiment, 28 straight-angle trapezoidal reinforcing ribs 7 are manufactured by numerically controlling the cutting of a 20mm-thick 45# steel plate by a laser cutting machine. Each reinforcing rib 7 has a size of 20mm in upper length, 60mm in lower length, and 80mm in height. The reinforcing ribs 7 are uniformly fixed on the outer arc surface of the arc-shaped steel plate 1 by welding.

[0060] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A profile stretch bending machine, characterized in that, The utility model relates to a kind of bending machine, including: Work platform; Plate side pushing device, it is set on the work platform; Draw bending assembly is installed on the work platform by the plate side pushing device, the draw bending assembly includes arc steel plate and inner core, the arc steel plate has the outer arc surface of preset curvature radius;The inner core has the inner arc side with the same preset curvature radius of the outer arc surface and the outer arc side oppositely arranged with the inner arc side, the inner arc side is fixedly arranged on the outer arc surface, and the outer arc side is used to bend the profile to be processed.

2. The profile stretch bending machine according to claim 1, characterized in that The height of the inner core is less than the height of the arc steel plate, the length of the inner core is equal to the length of the arc steel plate, and the inner arc side of the inner core is fixedly arranged at the middle position of the height direction of the outer arc surface of the arc steel plate.

3. The profile stretch bending machine according to claim 1, characterized in that The inner core includes: First arc-shaped support plate, inner side is fixedly arranged on the outer arc surface; Second arc-shaped support plate, inner side is fixedly arranged on the outer arc surface, and is arranged in parallel with the first arc-shaped support plate; Arc-shaped connecting plate, one side is connected with the outer side of the first arc-shaped support plate, and the other side is connected with the outer side of the second arc-shaped support plate; Wherein, the inner side of the first arc-shaped support plate and the second arc-shaped support plate is the inner arc side of the inner core, and the outer shape surface of the arc-shaped connecting plate is the outer arc side of the inner core.

4. The profile stretch bending machine according to claim 3, characterized in that The outer arc surface, the first arc-shaped support plate, the arc-shaped connecting plate and the second arc-shaped support plate are collectively surrounded to form a containing cavity, and a supporting block is arranged in the containing cavity.

5. The profile stretch bending machine according to claim 3, characterized in that The outer side of the first arc-shaped support plate and the second arc-shaped support plate is connected with the opposite sides of the arc-shaped connecting plate by welding respectively; The outer side of the first arc-shaped support plate and the second arc-shaped support plate is provided with welding bevel.

6. The profile stretch bending machine according to claim 5, characterized in that The specification of the welding bevel is 4mmx4mm, and the outer side of the first arc-shaped support plate and the second arc-shaped support plate is connected with the opposite sides of the arc-shaped connecting plate by argon arc welding respectively.

7. The profile stretch bending machine according to claim 3, characterized in that For processing the profile to be processed with L-shaped cross section, the profile to be processed includes vertically arranged first part and second part, the first part is placed on the outer side of the arc-shaped connecting plate, and the second part is placed above the first arc-shaped support plate.

8. The profile stretch bending machine according to claim 3, characterized in that It also includes positioning block, which is arranged on the first arc-shaped support plate, for limiting the profile to be processed.

9. The profile stretch bending machine according to claim 8, characterized in that It also includes flanging baffle, which is movably arranged on the top of the profile to be processed.

10. The profile stretch bending machine according to claim 9, characterized in that It also includes reinforcing rib, which is annularly arranged on the outer arc surface of the arc-shaped steel plate and located above the flanging baffle.

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