Rolling element structure type pipe beam bending forming device

Abstract

A kind of rolling body structure formula pipe beam bending forming device, including straight pipe beam guiding support wheel, the guide roller support of being equipped with guide roller, rolling body structure main body, discharge guide wheel and forming control wheel, rolling body structure main body is set in the upper of guide roller support and discharge guide roller, rolling body structure main body includes fixed outer frame, structure core, transmission gear and roller body, transmission gear is provided with four, symmetrically set at the front and rear ends of structure core, roller body is provided with several, along the periphery of structure core transversely set, the both ends of roller body are set on the gear teeth on the transmission gear of two ends, fixed outer frame is symmetrically fixed in the outside of transmission gear before and after, the both sides of rolling body structure main body are connected with first drive motor and second drive motor.The pipe beam is better wrapped in the area near before and after arc forming by the pipe beam bending arc using roller body structure, the bending process is rolling friction, greatly reduce the online bending resistance while also effectively inhibit wrinkle.

Description

TECHNICAL FIELD

[0001] The present application relates to a pipe beam roll forming device, in particular to a rolling body structure type pipe beam bending forming device. BACKGROUND

[0002] Under the background of energy saving and environmental protection, vehicle body lightweight trend, the social demand and application range of ultra-high strength steel pipe beam parts are continuously increasing. The online bending process of the cold bending forming line is an important part of the pipe beam bending production process, and is always the preferred process for pipe beam production. With the wide application of high-strength steel and the continuous improvement of strength, the thickness of the material used for cold bending forming is getting thinner and thinner, which is also an important method of lightweight.

[0003] However, the thinner the pipe beam material, the more difficult it is to control the appearance quality such as inner arc fold and the worse the forming quality during bending forming. In order to control the inner arc fold, the existing process is to increase the contact area and contact force between the bending die and the workpiece, which not only greatly increases the forming resistance, but also causes problems such as surface scratching of the workpiece and rapid wear of the bending die. The application of high-strength steel and the extensive development of deep-arc products make these problems worse, often resulting in cost that does not compensate for the loss.

[0004] Based on the above status, it is necessary to design a bending device that can reduce the online bending resistance while effectively suppressing the fold. SUMMARY

[0005] The present application is to overcome the drawbacks of the prior art, and provides a rolling body structure type pipe beam bending forming device. The pipe beam is better wrapped around the area near before and after bending, and the bending process is rolling friction, which greatly reduces the online bending resistance while effectively suppressing the fold.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] The application discloses a rolling body structure type pipe beam bending forming device, which comprises a straight pipe beam guiding support wheel, a guide roller support provided with a plurality of guide rollers, a rolling body structure main body, a discharging guide wheel and a forming control wheel, the rolling body structure main body is arranged above the guide roller support and the discharging guide wheel, a pipe beam is conveyed into the rolling body structure main body and the guide rollers from the straight pipe beam guiding support wheel along a feeding direction, is led out through the discharging guide wheel and is bent and formed through the forming control wheel, the rolling body structure main body comprises a fixed outer frame, a structure core, a transmission gear and a roller body, the fixed outer frame and the structure core are arranged in a similar long circular shape, the transmission gear is provided with four parts and is symmetrically arranged at front and rear end faces of the structure core, two transmission gears are arranged side by side on each end face, the two transmission gears at the front and rear end faces on the same side are coaxially connected through a transmission shaft and have the same tooth position, the roller body is provided with a plurality of parts and is arranged transversely along the periphery of the structure core, two ends of the roller body are arranged on the gear teeth of the transmission gears at the two ends respectively, the fixed outer frame is provided with two parts and is symmetrically fixed outside the transmission gears, one end of each of the two transmission shafts is connected with a first driving motor and a second driving motor respectively through the fixed outer frame.

[0008] In the rolling body structure type pipe beam bending forming device, the roller body is arranged in a cylindrical shape, the diameter D1 of the two ends of the roller body is greater than the diameter D2 of the middle section, the length of the middle section is greater than the length of the two end sections, and the length of the middle section matches the cross-sectional width of the pipe beam.

[0009] In the rolling body structure type pipe beam bending forming device, each gear tooth of the transmission gear is arranged in an arc shape, the arc degree of the gear tooth matches the arc degree of the column body with the diameter D1 of the two ends of the roller body, the two ends of the roller body are arranged in the gear tooth in a half-wrapped state.

[0010] In the rolling body structure type pipe beam bending forming device, the first long circular raceways are arranged at the front and rear edges on the roller surface of the structure core respectively, the outer circular surface of the two ends of the roller body with the diameter D1 is in contact with the bottom surface of the first long circular raceway, the middle position of the roller surface of the structure core is a convex plane, the width of the convex plane is the same as the length of the middle section of the roller body, and the middle section of the roller body is pressed on the convex plane.

[0011] The fixed outer frame is provided with a second long circular raceway on the side of the transmission gear, the end of the transmission gear and the roller body are located in the second long circular raceway, the second long circular raceway is composed of two straight line segments, two R1 circular arcs and two R2 circular arcs, the connecting portions are tangent, the midpoint connecting line of the two straight line segments is symmetrical, R1 < R2, the maximum radius of the transmission gear is smaller than the radius R1 of the arc segment of the second long circular raceway, and there is a certain gap between the outer wall of the second long circular raceway and the outer circular surface of the end of the roller body.

[0012] The two ends of the structure core body are provided with two trapezoidal positioning blocks at the middle positions of the end faces, the trapezoidal positioning blocks are arranged between the two transmission gears of the same end face, and the fixed outer frame is clamped on the trapezoidal positioning blocks.

[0013] The hole face of the middle connecting hole of the transmission gear is provided with a key groove, and the transmission shaft is provided with a protruding flat key, and the size of the flat key matches the size of the key groove.

[0014] The arc segment of the structure core body is arranged with the same center as the transmission gear.

[0015] The device further comprises a core fixing rod, the front end of the core fixing rod is fixed at the non-closed position of the pipe beam, and the tail end is connected with a core, the core is located on the straight line segment part tangent to the pipe beam, so that the pipe beam is fully wrapped by the core and the rolling body before the pipe beam is bent, and the pipe beam is prevented from being wrinkled and the cross-sectional shape is prevented from being distorted.

[0016] The beneficial effects of the present application are:

[0017] The forming device adopts the rolling body structure to bend the pipe beam, the running track of the roller body contains a straight segment and an arc segment, the pipe beam can be wrapped around the arc forming area, especially the inner arc side, so that the arc forming wrinkles can be well inhibited; the roller body in the forming device makes the pipe beam bending forming process be rolling friction, the friction resistance is very small, the production line load can be greatly reduced, the pipe beam wrinkles are further inhibited, and the surface quality of the pipe beam product is ensured; the driving motor is used to drive the roller body to actively circulate, the consistency of the circulation process and the production line speed can be effectively controlled; the roller body is designed to have a smaller diameter in the middle segment than in the end, the contact range between the rolling bodies is greatly reduced, the internal friction can be effectively reduced, and the rolling body is prevented from being stuck; the gear type transmission wheel is used to actively drive the roller body to move, so that the roller body can smoothly and orderly circulate around the non-circular raceway. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Structure diagram of the pipe beam bending forming device of the present application;

[0019] Fig. 2 Structure diagram of the side of the forming device;

[0020] Fig. 3 Structure diagram of the main body of the rolling body;

[0021] Fig. 4 Structure diagram of the core body;

[0022] Fig. 5 Structure diagram of the rolling body;

[0023] Fig. 6 Rolling body running track diagram.

[0024] In the figure: 1, straight pipe beam guide support wheel; 2, guide roller; 3, guide roller support; 4, main body of rolling body structure; 4-1, fixed outer frame; 4-11, second long circular raceway; 4-2, core body; 4-21, first long circular raceway; 4-22, convex plane; 4-23, trapezoidal positioning block; 4-3, transmission gear; 4-4, rolling body; 4-5, transmission shaft; 5, discharge guide wheel; 6, forming control wheel; 7, pipe beam; 8, first drive motor; 9, second drive motor; 10, core fixing rod. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the accompanying drawings.

[0026] Referring to Figs. 1-2 The pipe beam bending forming device of the rolling body structure of the present application comprises, in order along the feeding direction, straight pipe beam guide support wheels 1, guide roller supports 3 provided with a plurality of guide rollers 2, a main body of rolling body structure 4, a discharge guide wheel 5, and a forming control wheel 6. The straight pipe beam guide support wheels 1 are provided in three groups at intervals along the feeding direction. The main body of rolling body structure 4 is arranged above the guide roller support 3 and the discharge guide wheel 5. The pipe beam 7 is fed into the space between the main body of rolling body structure 4 and the guide rollers 2 from the straight pipe beam guide support wheels 1 along the feeding direction, is guided out through the discharge guide wheel 5, and is bent and formed through the forming control wheel 6. The main body of rolling body structure 4 is provided in the shape of a long circle and is connected to the first drive motor 8 and the second drive motor 9 through transmission shafts at both ends, respectively, to provide rotating power for the main body of rolling body structure.

[0027] Referring to Fig. 3 and Fig. 5The rolling body structure main body 4 includes a fixed outer frame 4-1, a structure core 4-2, transmission gears 4-3 and roller bodies 4-4. The end face of the fixed outer frame 4-1 and the end face of the structure core 4-2 are both set as similar long circles, both including a straight section and an arc section. The transmission gears 4-3 are provided with four identical gears, which are symmetrically arranged at the front and rear end faces of the structure core 4-2. Two gears are arranged side by side on each end face. The arc sections on the left and right sides of the structure core 4-2 are respectively arranged with the same center as the two transmission gears 4-3 on the same end face. The two transmission gears 4-3 on the front and rear end faces of the same side are coaxially connected through a transmission shaft 4-5, and the gears have the same tooth position. The roller bodies 4-4 are provided in a cylindrical shape, and the diameters D1 of the two ends are greater than the diameter D2 of the middle section, which can greatly reduce the contact range between the rolling bodies, effectively reduce the internal friction and prevent the rolling bodies from being stuck. The length of the middle section is greater than the length of the two end sections, and the length of the middle section matches the cross-sectional width of the pipe beam 7, thereby providing support when the pipe beam is bent into an arc. The roller bodies 4-4 are provided with several roller bodies, which are arranged transversely along the periphery of the structure core 4-2. The two ends of the roller bodies 4-4 are arranged on the gear teeth on the two end transmission gears, respectively. Each gear tooth is provided in an arc shape, and the arc degree matches the arc degree of the D1 diameter of the roller body 4-4. The two ends of the roller body 4-4 are placed in the gear teeth in a half-wrapped state. The front and rear edges on the roller surface of the structure core 4-2 are respectively provided with a sunken first long circular raceway 4-21. The outer circular surface of the two ends of the roller body 4-4 with a diameter of D1 is in contact with the bottom surface of the first long circular raceway 4-21. The two ends of the roller body roll on the gear teeth and the first long circular raceway. The middle position of the roller surface of the structure core 4-2 is a raised plane 4-22. The width of the raised plane 4-22 is the same as the length of the middle section of the roller body 4-4. The middle section of the roller body 4-4 is pressed on the raised plane.

[0028] The fixed outer frame 4-1 is provided with two fixed outer frames 4-1, which are symmetrically fixed on the outer side of the transmission gears 4-3. The side of the fixed outer frame 4-1 facing the transmission gears 4-3 is provided with an inner recessed second long circular raceway 4-11. The end of the transmission gear 4-3 and the roller body 4-4 are located in the second long circular raceway 4-11. The shape of the second long circular raceway 4-11 is the circular rolling track of the roller body 4-4 in the second long circular raceway, that is, Fig. 6The long circular rolling track is composed of two straight line segments, two R1 circular arcs, two R2 circular arcs, and the connecting parts are tangent. To improve the interchangeability of structural components, the track is designed to be symmetrical about the connecting line of the two straight line segments. The R1 segment circular arc track is used for the circulation of the roller body and does not directly participate in the bending forming of the pipe beam; the R2 segment circular arc track is used for the circulation of the roller body and directly participates in the bending forming of the pipe beam. When the pipe beam is bent, the inner arc surface wraps around this area, and the required roll arc radius is realized by controlling the wrapping range size by the forming control wheel 6. Therefore, the limit forming radius of the pipe beam that can be realized by the device is determined by the value of R2, that is, R2 needs to be designed according to the limit arc radius requirement, and R1 only needs to be able to meet the circulation of the roller body. Generally, R1 < R2, so the R1 / R2 segmented design of the track can minimize the overall size of the device, making the device structure more compact and the cost lower. The maximum radius (addendum radius) of the transmission gear 4-3 is smaller than the radius of the arc segment of the second long circular raceway 4-11, and there is a certain gap between the outer wall of the second long circular raceway and the outer circular surface of the end of the roller body 4-4. One end of the two transmission shafts 4-5 passes through the fixed outer frame 4-1 and is connected with the first driving motor 8 and the second driving motor 9 respectively to provide power for the transmission gear.

[0029] Referring to Fig. 4 , two trapezoidal positioning blocks 4-23 are arranged at the middle positions of the two end faces of the structural core 4-2, the trapezoidal positioning blocks 4-23 are arranged between the two transmission gears 4-3 on the same end face, and the fixed outer frame 4-1 is clamped on the trapezoidal positioning blocks 4-23.

[0030] A key groove is arranged on the hole face of the middle connecting hole of the transmission gear 4-3, and a protruding flat key is arranged on the transmission shaft 4-5, and the size of the flat key matches the size of the key groove.

[0031] The device further comprises a core fixing rod 10, the front end of which is fixed at the non-closed part of the pipe beam 7, and the tail end is connected with a core (not shown), and the core is located on the straight line segment part tangent to the arc segment of the pipe beam.

[0032] When the pipe beam is bent into an arc, as the roller line continuously pushes the pipe beam forward, the first driving motor 8 and the second driving motor 9 match the pipe beam forward speed to drive the roller body 4-4 to rotate around the structural core 4-2, thereby realizing continuous bending forming of the pipe beam.

Claims

1. A rolling element structure tube beam bending forming device, characterized in that: The forming device includes a straight tube beam guide support wheel (1), a guide roller bracket (3) with several guide rollers (2), a rolling body structure (4), a discharge guide wheel (5), and a forming control wheel (6). The rolling body structure (4) is located above the guide roller bracket (3) and the discharge guide wheel (5). The tube beam (7) is fed into the space between the rolling body structure (4) and the guide rollers (2) by the straight tube beam guide support wheel (1) along the feeding direction, led out by the discharge guide wheel (5), and then bent and formed by the forming control wheel (6). The rolling body structure (4) includes a fixed outer frame (4-1), a structural core (4-2), a transmission gear (4-3), and a roller (4-4). The fixed outer frame (4-1) and the structural core (4-2) are set to have similar lengths. The core (4-2) is circular. Four transmission gears (4-3) are symmetrically arranged on the front and rear end faces of the core (4-2). Two transmission gears are arranged side by side on each end face. The two transmission gears (4-3) on the same side are coaxially connected by a transmission shaft (4-5) and have the same tooth position. Several rollers (4-4) are arranged laterally along the periphery of the core (4-2). The two ends of the rollers (4-4) are respectively arranged on the teeth of the transmission gears at both ends. Two fixed outer frames (4-1) are arranged and symmetrically fixed on the outside of the transmission gears (4-3). One end of each of the two transmission shafts (4-5) passes through the fixed outer frame (4-1) and is connected to the first drive motor (8) and the second drive motor (9) respectively. The roller (4-4) is cylindrical, with the diameter D1 at both ends being greater than the diameter D2 in the middle section, the length of the middle section being greater than the length of the two ends, and the length of the middle section matching the cross-sectional width of the tube beam (7). The fixed outer frame (4-1) has a concave second elongated oval raceway (4-11) on the side facing the transmission gear (4-3). The ends of the transmission gear (4-3) and the roller (4-4) are both located inside the second elongated oval raceway (4-11). The second elongated oval raceway (4-11) is composed of two straight segments, two R1 arc segments, and two R2 arc segments connected together. The connection points are tangent. The line connecting the midpoints of the two straight segments is symmetrical, and R1 < R2. The maximum radius of the transmission gear (4-3) is smaller than the radius R1 of the arc segment of the second elongated oval raceway (4-11). There is a certain gap between the outer wall of the second elongated oval raceway and the outer circular surface of the end of the roller (4-4).

2. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: Each tooth of the transmission gear (4-3) is set in an arc shape, and its arc matches the arc of the roller (4-4) with a diameter of D1 at both ends. The two ends of the roller (4-4) are placed in the tooth, in a semi-enclosed state.

3. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: The front and rear edges of the roller surface of the structural core (4-2) are respectively provided with a first oblong raceway (4-21) that is sunken. The outer circular surfaces of the two ends of the roller (4-4) with a diameter of D1 are in contact with the bottom surface of the first oblong raceway (4-21). The middle position of the roller surface of the structural core (4-2) is a raised plane (4-22). The width of the raised plane (4-22) is the same as the length of the middle section of the roller (4-4). The middle section of the roller (4-4) is pressed on the raised plane.

4. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: Two trapezoidal positioning blocks (4-23) are arranged at intervals at the middle of both ends of the structural core (4-2). The trapezoidal positioning blocks (4-23) are arranged between the two transmission gears (4-3) on the same end face. The fixed outer frame (4-1) is snapped onto the trapezoidal positioning blocks (4-23).

5. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: The transmission gear (4-3) has a keyway on the surface of the intermediate connecting hole, and the transmission shaft (4-5) has a raised flat key, the size of which matches the size of the keyway.

6. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: The arc segment of the structural core (4-2) is co-centered with the transmission gear (4-3).

7. The rolling element structure tube beam bending forming device according to claim 1, characterized in that: The device also includes a core fixing rod (10), the front end of which is fixed to the unclosed part of the tube beam (7), and the end is connected to the core, the core being located in the straight section tangent to the arc segment of the tube beam.

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