Automatic bending machine

Abstract

The present invention provides an automatic bending machine, belonging to the technical field of bending machines, the automatic bending machine comprises a seat, a shaping device, a profile clamping assembly slidably assembled on the seat along the front-back direction, the shaping device comprises an arc-shaped positioning plate with an opening facing backward, the shaping device also comprises a lifting drive mechanism for driving the arc-shaped positioning plate to lift and lower, a support mechanism located at the rear side of the arc-shaped positioning plate, a winding mechanism located at the rear side of the support mechanism, and a belt winding mechanism arranged above the support mechanism, the winding mechanism comprises a winding drum, a belt winding roller arranged in the winding drum and with an axis extending up and down, a steel belt wound on the winding shaft, and a winding motor driving the belt winding roller to rotate to wind up the steel belt. The present invention can adjust the bending diameter of the device without replacing the mold, and the span between two similar bending diameters after adjustment is small, which can be applicable to the bending needs of profiles with non-standard radius, and has stronger versatility.

Description

Technical Field

[0001] The invention belongs to the technical field of stretch-bending machines, and in particular relates to an automatic stretch-bending machine. Background Art

[0002] Stretch bending is a stamping process that bends metal sheets, pipes and aluminum profiles into workpieces with a certain curvature, shape and size; stretch bending is widely used in the manufacture of high-pressure vessels, boiler drums, boiler tubes, steel plates and ribs of ship hulls, various utensils, instrument components, and cabinet trims. In the existing stretch bending process, a stretch bending machine is usually used to stretch and bend aluminum profiles. The principle is: the aluminum profile is fixed in an arc-shaped fixed mold and two bending molds. The fixed mold does not move, and the two bending molds drive the profile to move toward the fixed mold, so that the profile fits on the arc surface of the fixed mold, so that the aluminum profile is synchronously deformed in an arc shape. The stretch bending of aluminum profiles is a process of changing the cross-sectional shape of the profile by rotating and leaning on the premise of giving the profile a prefabricated tensile force to make it plastically deformed.

[0003] A new type of profile bending machine is disclosed in a Chinese patent with authorization announcement number CN213591478U, which includes an operating table, an arc mold and a clamping mechanism. The arc mold is fixedly installed on the operating table, and the flexible mold is horizontally slidably installed on the operating table. The clamping mechanism is installed on the operating table and is used to clamp the profile. The clamping mechanism can move horizontally on the operating table and drive the profile close to or away from the arc mold.

[0004] When in use, the clamping mechanism clamps the profile and approaches the arc mold, and the profile fits against the protruding side of the arc mold to achieve the bending of the profile. The radius of the bent profile depends on the radius of the outer side of the arc mold.

[0005] In the prior art, arc-shaped molds are also called arc-shaped positioning blocks, and the radius of their outer surfaces has a specific series, usually covering a series of standard radiuses. When used, arc-shaped positioning blocks corresponding to the standard radius are selected according to the bending radius required by the profile. However, in actual use, it is often encountered that the bending radius required by the profile is not a standard radius. In this case, the bending machine cannot be used for bending, and the versatility is poor. Summary of the invention

[0006] The purpose of the present invention is to provide an automatic bending machine, aiming to solve the technical problem in the prior art that when the bending radius required by the profile is not a standard radius, the bending machine cannot be bent and has poor versatility.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic stretch bending machine, comprising a base body, a shaping device, and a profile clamping assembly slidably assembled on the base body along the front-rear direction, the shaping device comprising an arc-shaped positioning plate with an opening facing backwards, the shaping device also comprising a lifting drive mechanism for driving the arc-shaped positioning plate to rise and fall, a supporting mechanism located at the rear side of the arc-shaped positioning plate, a winding mechanism located at the rear side of the supporting mechanism, and a belt winding mechanism arranged above the supporting mechanism.

[0008] The winding mechanism comprises a winding roller with an axis extending up and down, a steel belt wound on the winding shaft, and a winding motor driving the winding roller to rotate to wind up the steel belt.

[0009] The supporting mechanism comprises a supporting column coaxially arranged with the arc-shaped positioning plate, a fixing ring fixedly sleeved on the supporting column, and a plurality of telescopic supporting members evenly distributed on the fixing ring. The plurality of telescopic supporting members are telescopic along the radial direction of the supporting column and jointly support the steel belt.

[0010] The belt winding mechanism comprises a rotating ring installed on the top of the support column and rotating around an axis extending up and down, a telescopic arm installed on the rotating ring and telescopic along the support column, and the end of the telescopic arm is connected to one end of the steel belt.

[0011] Each telescopic support member has an extended state and a retracted state. When in the extended state, the telescopic arm is extended and then rotates with the rotating ring and pulls the steel belt. The steel belt is wrapped around the end of each telescopic support member to form a steel belt loop, and the lifting drive mechanism drives the arc-shaped positioning plate to rise to the inner side of the steel belt loop; when in the retracted state, the telescopic arm retracts and the winding motor winds up the steel belt and makes the steel belt fit onto the arc-shaped outer surface of the arc-shaped positioning plate.

[0012] The effect is that when the telescopic support is in the extended state, the telescopic arm extends and pulls the steel belt, and the front end of the formed steel belt loop is located on the front side of the arc positioning plate, so that the lifting drive mechanism drives the arc positioning plate to rise to the inner side of the steel belt loop, so that when the telescopic support is in the retracted state, the winding motor can wind the steel belt and make the steel belt fit on the arc surface on the front side of the arc positioning plate. By fitting the steel belt on the arc positioning plate, the radius of the formed arc can be increased. In actual use, the number of turns of the steel belt required is designed according to the required bending radius of the profile and the thickness of the steel belt, so that the arc radius finally formed by the arc positioning plate and the steel belt is equal to the required bending radius. The automatic bending machine of the present invention can be applied to the bending needs of profiles with non-standard radius and has stronger versatility.

[0013] Furthermore, the telescopic support member includes a first telescopic rod, an ear plate and a support roller. The first telescopic rod is installed on a fixed ring. There are two ear plates that are distributed on the telescopic end of the first telescopic rod at intervals up and down. The support roller is rotatably installed on the two ear plates, and the rotation axis of the support roller is parallel to the axis of the support column.

[0014] Furthermore, the width of the steel belt is greater than the length of the support roller, and the bottom edge of the steel belt extends downwardly out of the support roller. When the bottom edge of the steel belt extends downwardly out of the support roller, when the arc-shaped positioning plate is located below the support roller, the steel belt can be attached to the arc-shaped positioning plate, and even if the distance between two adjacent support rollers is small, it does not affect the attachment of the steel belt.

[0015] Furthermore, the telescopic arm includes a second telescopic rod and a fixing piece. The second telescopic rod is mounted on the rotating ring. The fixing piece is mounted on the telescopic end of the second telescopic rod and extends downward. The fixing piece is connected to the steel belt.

[0016] Furthermore, the belt winding mechanism also includes a driving component for driving the rotating ring to rotate, the driving component includes a driving motor, an inner gear ring, a gear and a transmission shaft, an annular groove is opened on the inner wall of the rotating ring, the inner gear ring is fixedly installed in the annular groove, a transmission groove is opened on the side wall of the support column, the gear is located in the transmission groove and meshes with the inner gear ring, the upper end of the transmission shaft penetrates into the transmission groove and is fixedly installed in the gear, the lower end of the transmission shaft penetrates through the support column and the seat body and extends to the bottom of the seat body, the driving motor is arranged at the bottom of the seat body and is connected to the transmission shaft.

[0017] The effect is that it can drive the rotating ring on the belt winding mechanism to rotate, thereby pulling out the steel belt and wrapping the steel belt around to form a steel belt loop, and then transferring the wrapped steel belt to the arc positioning plate, so that the device can wrap the steel belt around arc positioning plates of different diameters, thereby increasing the bending diameter on the arc positioning plate to make it the same as the diameter that the profile needs to be bent.

[0018] Furthermore, the winding mechanism also includes a winding drum, and the winding roller and the winding motor are both located inside the winding drum. An outlet slot is provided on the top of the outer wall of the winding drum, and one end of the steel belt passes through the outlet slot and is connected to the telescopic arm. By providing a winding drum and having the winding roller and the winding motor both built into the winding drum, safety can be improved to prevent injuries to personnel caused by unwinding of the steel belt.

[0019] The effect is that after the steel strip is transferred to the arc-shaped positioning block, part of the steel strip can be retracted into the retracting mechanism so that the remaining steel strip can be tightly attached to the arc-shaped positioning block. When the profile bending is completed, the steel strip can be completely retracted into the retracting mechanism for easy use next time.

[0020] Furthermore, a plurality of slots are provided on the outer wall of the take-up drum away from the support column, and rollers with axes parallel to the axis of the take-up drum are rotatably installed in the plurality of slots, and the rollers are used to support the steel belt when the steel belt is wound around the outside of the take-up drum. Rolling friction can be formed between the ball and the steel belt, thereby reducing the wear on the steel belt.

[0021] The effect is that the steel belt can be supported when it passes around the take-up drum, the friction between the take-up drum and the steel belt is reduced, the wear of the steel belt is reduced, and the service life of the steel belt is increased.

[0022] Furthermore, there are a plurality of coaxially arranged arc-shaped positioning plates, and each arc-shaped positioning plate is correspondingly provided with a lifting drive mechanism.

[0023] Furthermore, a mounting groove is provided on the top of the seat body, the shaping device is arranged in the mounting groove, and the profile clamping assembly is arranged on the top surface of the seat body.

[0024] Furthermore, the profile clamping assembly includes two clamping units arranged at intervals on the left and right, and the clamping unit includes a slider slidably assembled on the seat body along the front-to-back direction, a connecting block rotatably mounted on the slider around an axis extending up and down, a fixed support block in the connecting block telescopically assembled along the left and right directions, and a clamping block fixedly mounted on the fixed support block, a clamping groove for the end of the profile to extend into is provided in the clamping block, and a pressure plate for pressing the profile in the clamping groove and a telescopic pressure rod for driving the pressure plate to move are also provided on the clamping block.

[0025] The effect is that the profiles of different lengths can be clamped and the profiles can be driven to move toward the shaping device, thereby completing the stretching and bending of the profiles.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides an arc-shaped positioning plate, a supporting mechanism, a winding mechanism and a belt winding mechanism, so that the bending diameter of the device can be adjusted without replacing the mold, and the span between two similar bending diameters after adjustment is smaller, so that the device can cover as many required bending diameters as possible, can be suitable for the bending needs of profiles with non-standard radius, and has stronger versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of the initial state of the stretch bending machine in the present invention;

[0030] Figure 2 It is a top view schematic diagram of the stretch bending machine in the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the clamping assembly in the present invention;

[0032] Figure 4 It is a structural schematic diagram of the stretch bending die in the present invention;

[0033] Figure 5 It is a schematic diagram of the front cross-section of the stretch bending die in the present invention;

[0034] Figure 6For the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0035] Figure 7 It is a cross-sectional schematic diagram of the winding mechanism in the present invention;

[0036] Figure 8 It is a schematic structural diagram of the bending diameter adjustment of the bending machine in the present invention;

[0037] Fig. 9 It is a schematic structural diagram of the tightening assembly in the present invention.

[0038] In the figure: 1, seat body; 11, mounting groove; 12, guide slide groove; 2, shaping device; 21, support column; 212, transmission groove; 22, take-up drum; 221, steel belt; 222, outlet groove; 223, take-up motor; 224, take-up shaft; 225, take-up wheel; 226, roller; 23, rotating ring; 231, annular groove; 232, inner gear ring; 24, telescopic arm; 241, fixing member; 25, fixing ring; 26, telescopic support member; 261, support roller; 27, gear Wheel; 28, transmission shaft; 29, arc-shaped positioning plate; 291, lifting drive mechanism; 3, profile clamping assembly; 31, slider; 311, mounting cavity; 32, connecting block; 321, driving member; 322, adjusting slide groove; 33, fixed support member; 331, connecting groove; 332, telescopic push rod; 34, clamping block; 341, clamping groove; 35, pressure plate; 36, telescopic pressure rod; 4, tightening assembly; 41, mounting seat; 42, tightening member; 43, hydraulic cylinder; 44, placement rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1-Figure 9 The present invention provides the following technical solutions: an automatic stretch bending machine, comprising a base body 1, a shaping device 2, a profile clamping assembly 3 slidably assembled on the base body 1 along the front-rear direction, and a tightening assembly 4 arranged at the rear end of the base body 1.

[0041] A mounting groove 11 is provided at the top of the base body 1, and the shaping device 2 is arranged in the mounting groove 11. The rear side groove wall of the mounting groove 11 is an arc-shaped groove wall with an opening facing forward. Guide grooves 12 are respectively provided on the left and right sides of the top of the base body 1. The guide grooves 12 extend along the front-to-back direction to guide the movement of the profile clamping assembly 3.

[0042] The shaping device 2 is used to stretch and bend the aluminum profile. The shaping device 2 includes an arc-shaped positioning plate 29 with an opening facing backward, a lifting drive mechanism 291 for driving the arc-shaped positioning plate 29 to rise and fall, a supporting mechanism located at the rear side of the arc-shaped positioning plate 29, a winding mechanism located at the rear side of the supporting mechanism, and a belt winding mechanism arranged on the supporting mechanism.

[0043] refer to Figure 1 and Figure 7 As shown, the winding mechanism includes a winding drum 22, a winding roller with an axis extending up and down, a steel belt 221 wound on the winding roller, and a winding motor 223 that drives the winding roller to rotate to wind up the steel belt 221, which is used to wind up the steel belt 221 to ensure that the steel belt 221 can be tightly attached to the working surface of the arc positioning plate 29.

[0044] The reel 22 is a cylinder with closed top and bottom, and its axis extends up and down. The belt roller and the reel motor 223 are both located inside the reel 22. Of course, during processing, in order to install the belt roller and the reel motor 223, the reel 22 can be set as a split structure, and the reel 22 can be assembled together after the belt roller and the reel motor 223 are installed. An outlet slot 222 is provided at the top of the outer wall of the reel 22, and one end of the steel belt 221 passes through the reel 22 through the outlet slot 222. A plurality of slots are provided at the rear side of the reel 22, and rollers 226 whose axes are parallel to the axis of the reel 22 are rotatably installed in the plurality of slots. The height of the rollers 226 is the same as the height of the outlet slot 222, and is used to support the steel belt 221 when the steel belt 221 passes around the reel 22, thereby reducing the friction between the reel 22 and the steel belt 221.

[0045] The belt reel includes a reel shaft 224 and a reel wheel 225. The upper end of the reel shaft 224 is rotatably mounted on the top inner wall of the reel drum 22, and the lower end is connected to the reel motor 223. The reel wheel 225 is fixedly mounted on the reel shaft 224 and corresponds to the outlet slot 222. One end of the steel belt 221 is fixed on the reel wheel 225.

[0046] The bottom of the winding motor 223 is fixedly mounted on the bottom inner wall of the winding drum 22, and its output shaft is connected to the winding shaft 224, which can be connected by a coupling or directly welded together. The winding motor 223 is started during winding, and the steel belt 221 is wound around the winding roller; during unwinding, the output shaft of the winding motor 223 is driven by the steel belt 221 to rotate.

[0047] refer to Figure 1 , Figure 4 and Figure 5As shown, the support mechanism includes a support column 21 coaxial with the arc-shaped positioning plate 29, a fixed ring 25 fixedly mounted on the support column 21, and a plurality of telescopic support members 26 evenly distributed on the fixed ring 25 and extending and retracting along the radial direction of the support column 21 and jointly supporting the steel belt 221, which are used to support the steel belt 221 wound by the belt winding mechanism and prepare for the steel belt 221 to be tightly attached to the working surface of the arc-shaped positioning plate 29.

[0048] The telescopic support member 26 includes a first telescopic rod, an ear plate and a support roller 261. The first telescopic rod is installed on the fixed ring 25. There are two ear plates that are spaced apart up and down on the telescopic end of the first telescopic rod. The support roller 261 is rotatably installed on the two ear plates. The rotation axis of the support roller 261 is parallel to the axis of the support column 21. The width of the steel belt 221 is greater than the length of the support roller 261. The bottom edge of the steel belt 221 extends downward from the support roller 261 to prevent the telescopic end of the first telescopic rod from affecting the arc-shaped positioning plate 29 from rising to a height that can overlap with the steel belt 221.

[0049] refer to Figure 1 , Figure 4-Figure 6 As shown, the belt winding mechanism includes a rotating ring 23 installed on the top of the support column 21 and rotating around a circumferential axis extending up and down, a telescopic arm 24 installed on the rotating ring 23 and extending radially along the support column 21, and a driving assembly for driving the rotating ring 23 to rotate, which can pull the steel belt 221 out of the winding mechanism and wind the steel belt 221 around the support mechanism.

[0050] The telescopic arm 24 includes a second telescopic rod and a fixing member 241. The second telescopic rod is installed on the rotating ring 23. The fixing member 241 is installed on the telescopic end of the second telescopic rod and extends downward. The fixing member 241 is connected to the steel belt 221. The telescopic arm 24 shrinks synchronously with the telescopic support member 26 to ensure that the steel belt 221 can be wound around the support roller 261.

[0051] The driving assembly includes a driving motor, an inner gear ring 232 , a gear 27 and a transmission shaft 28 .

[0052] An annular groove 231 is formed on the inner wall of the rotating ring 23 , and an inner gear ring 232 is fixedly installed in the annular groove 231 . A transmission groove 212 is formed on the side wall of the supporting column 21 , and the gear 27 is located in the transmission groove 212 and meshes with the inner gear ring 232 .

[0053] The transmission shaft 28 is coaxial with the gear 27 , the upper end of which rotates through the support column 21 to extend into the transmission groove 212 and is fixedly installed in the gear 27 , and the lower end of which passes through the support column 21 and the seat body 1 and extends to the bottom of the seat body 1 .

[0054] The drive motor is arranged at the bottom of the seat body 1, and its output shaft is connected to the transmission shaft 28, which can be connected by a coupling or directly welded together. The drive motor is started when winding the belt, and drives the telescopic arm 24 to rotate and wind the steel belt 221 around the support roller 261.

[0055] refer to Figure 1 , Figure 2 and Figure 8 As shown, there are multiple coaxially arranged arc-shaped positioning plates 29 , and each arc-shaped positioning plate 29 is correspondingly provided with a lifting drive mechanism 291 . There are multiple lifting drive mechanisms 291 under each arc-shaped positioning plate 29 , and the multiple lifting drive mechanisms 291 are evenly distributed along the arc direction of the arc-shaped positioning plate 29 .

[0056] Each telescopic support member 26 has an extended state and a retracted state. When in the extended state, the telescopic arm 24 rotates with the rotating ring 23 and pulls the steel belt 221. The steel belt 221 is wrapped around the end of each telescopic support member 26 to form a steel belt loop. The lifting drive mechanism 291 drives the arc-shaped positioning plate 29 to rise to the inner side of the steel belt loop; when in the retracted state, the winding motor 223 winds up the steel belt 221 and makes the steel belt 221 fit onto the arc-shaped outer surface of the arc-shaped positioning plate 29.

[0057] According to the required bending radius of the profile, an arc-shaped positioning plate 29 close to the bending radius is selected, and the number of turns of the steel belt 221 is determined according to the difference between the two and the thickness of the steel belt 221. Then, the telescopic arm 24 and the telescopic end of the telescopic support member 26 are controlled to be ejected to the maximum extent, and the driving assembly drives the rotating ring 23 and the telescopic arm 24 to rotate. The telescopic arm 24 pulls the steel belt 221 out of the winding drum 22 and wraps it around multiple support rollers 261 to form a steel belt loop. After the number of turns is reached, the number of turns calculated by the design is reached and the telescopic arm 24 and the arc-shaped positioning plate 29 close to the bending radius of the profile is selected. When the positions of the arc positioning plates 29 do not overlap, the rotating ring 23 and the telescopic arm 24 stop rotating, and the lifting drive mechanism 291 lifts the selected arc positioning plate 29 until the top of the arc positioning plate 29 exceeds the bottom of the steel belt 221 on the support roller 261, and the telescopic end of the telescopic support 26 is retracted. At the same time, the winding drum 22 begins to wind up the steel belt 221, and the excess steel belt 221 is wound into the inside of the winding drum 22, and the remaining steel belt 221 is tightened and attached to the outer surface of the arc positioning plate 29, so that the shaping device 2 completes the adjustment and reaches the state of the profile being bent.

[0058] refer to Figure 1 and Figure 3 As shown, the profile clamping assembly 3 includes two clamping units arranged at intervals on the left and right, and the clamping unit includes a slider 31, a connecting block 32, a fixed support 33, a clamping block 34 and an electric telescopic rod for driving the slider 31 to move, which can clamp the profile and drive the profile to move toward the shaping device 2, so that the profile can be bent under the action of the shaping device 2.

[0059] The slider 31 is installed on the top of the base 1 and slides along the guide slot 12. A mounting cavity 311 is provided on one side of the slider 31 facing the other clamping unit. A driving member 321 is fixedly installed on the top of the mounting cavity 311. The driving member 321 is a servo motor.

[0060] The bottom of the connecting block 32 is rotatably mounted at the bottom of the mounting cavity 311, and the top is connected to the output shaft of the motor, specifically by a coupling or directly welded together. An adjusting slot 322 for mounting the fixing support member 33 is provided on one side of the connecting block 32 facing the other clamping unit.

[0061] One end of the fixed support member 33 is installed on the side of the connecting block 32 facing the other clamping unit, and the other end of the fixed support member 33 is provided with a connecting groove 331. A telescopic push rod 332 is installed inside the connecting groove 331. The fixed end and the telescopic end of the telescopic push rod 332 are respectively fixedly installed on the inner wall of the connecting groove 331 and the inner wall of the adjusting slide groove 322, so as to drive the fixed support member 33 to slide in the adjusting slide groove 322. The telescopic push rod 332 is an electric telescopic rod in this embodiment, and a cylinder in other embodiments.

[0062] The clamping block 34 is installed at one end of the fixed support 33 away from the connecting block 32. A clamping groove 341 is provided on the side of the clamping block 34 away from the fixed support 33 for the end of the aluminum profile to extend into. A pressure plate 35 is slidably installed on one side of the clamping groove 341. The pressure plate 35 is arranged parallel to the aluminum profile and slides in the direction of the aluminum profile to press it. A telescopic pressure rod 36 is fixedly installed on the outer wall of the clamping block 34 on one side parallel to the pressure plate 35. The telescopic pressure rod 36 is an electric telescopic rod in this embodiment and a cylinder in other embodiments. The telescopic end of the telescopic pressure rod 36 slides through the clamping block 34 and then extends into the clamping groove 341 and is fixedly connected to the pressure plate 35.

[0063] When the aluminum profile is bent, the two ends of the aluminum profile are respectively extended into the clamping grooves 341 provided on the two clamping blocks 34 on the profile clamping assembly 3, and the telescopic pressure rod 36 is started to push out the telescopic end and drive the pressure plate 35 to move toward the aluminum profile. As the pressure plate 35 moves, the pressure plate 35 presses the aluminum profile in the clamping groove 341. When the aluminum profile is shorter, the telescopic push rod 332 can be started to extend the telescopic end and drive the fixed support member 33 to slide out of the adjustment slide groove 322, thereby driving the two clamping blocks 34 to approach each other, so that the two ends of the aluminum profile can be respectively extended into the clamping grooves 341 provided on the two clamping blocks 34. When the aluminum profile is clamped and fixed, the driving rod 36 is started. The driving device drives the two sliders 31 to slide along the guide slot 12, so that the two sliders 31 drive the clamped and fixed aluminum profile to move toward the shaping device 2 after adjustment. When the aluminum profile contacts the arc-shaped positioning plate 29 and the steel belt 221, the driving member 321 is started and drives the connecting block 32 to rotate, thereby driving the fixed support member 33 and the clamping block 34 to rotate away from the shaping device 2, and then as the slider 31 continues to slide, the telescopic end of the telescopic push rod 332 continues to extend as the connecting block 32 rotates, compensating for the reduced distance between the two ends of the profile due to bending after the profile is stretched and bent, thereby ensuring that the aluminum profile can be stretched and bent smoothly.

[0064] The clamping assembly 4 includes a mounting seat 41, a clamping piece 42, a hydraulic cylinder 43 and a placing rod 44. The mounting seat 41 is mounted on the top of the seat body 1 and is located at the center of the two sliders 31. A limiting slide groove is provided in the middle of the top end of the mounting seat 41. The limiting slide groove is arranged parallel to the guide slide groove 12. The clamping piece 42 is slidably mounted on the top of the mounting seat 41 and a protruding limiting portion sliding along the limiting slide groove is provided at the bottom thereof. The hydraulic cylinder 43 is arranged on the top of the clamping piece 42 for driving the clamping piece 42 to slide toward the aluminum profile along the limiting slide groove, and to clamp the aluminum profile when it is bent, which is beneficial to improving the shaping efficiency of the aluminum profile after drawing and bending and ensuring the shaping effect of the aluminum profile after drawing and bending. There are two placing rods 44 that are symmetrically arranged at both ends of the mounting seat 41 on the side away from the shaping device 2, which are used to place the aluminum profile to be drawn and bent, which is convenient for the subsequent loading and unloading of the aluminum profile to be drawn and bent, and improves the drawing and bending efficiency of the device.

[0065] The implementation principle of the embodiment of the present invention is: before the aluminum profile is bent, an arc-shaped positioning plate 29 with a similar bending radius is selected according to the required bending radius of the profile, and the number of turns of the steel strip 221 is determined according to the difference between the two and the thickness of the steel strip 221.

[0066] The telescopic arm 24 and the telescopic support member 26 are controlled to be pushed out to the maximum extent, so that the support roller 261 and the fixing member 241 are both located on the outside of the selected arc positioning plate 29, and then the driving assembly is started to drive the rotating ring 23 to rotate, and the rotating ring 23 drives the telescopic arm 24 to rotate, so that the telescopic arm 24 pulls the steel belt 221 out of the winding drum 22 and wraps it around multiple support rollers 261 to form a steel belt loop. When the number of circles after winding reaches the number of circles calculated by the design and the position of the telescopic arm 24 and the arc positioning plate 29 do not overlap, the rotating ring 23 stops rotating, and the lifting drive mechanism 291 is controlled to lift the selected arc positioning plate 29. When the top of the arc positioning plate 29 exceeds the bottom of the steel belt 221 on the support roller 261, the state of the bending device at this time is as follows Figure 8 As shown, at this time, the arc-shaped positioning plate 29 reaches the bending height, and controls the telescopic end of the telescopic support 26 to be retracted, and at the same time controls the winding drum 22 to start winding the steel belt 221, and starts the winding motor 223 to drive the winding shaft 224 to rotate, so that the winding shaft 224 drives the winding wheel 225 to rotate, thereby winding the steel belt 221, so that the excess steel belt 221 is wound into the inside of the winding drum 22, and the remaining steel belt 221 is tightened and attached to the outer surface of the arc-shaped positioning plate 29.

[0067] Then, the aluminum profile is placed between the two clamping blocks 34 of the profile clamping assembly 3, so that its height is consistent with the height of the joint between the arc-shaped positioning plate 29 and the steel belt 221, and the telescopic push rod 332 is started to drive the fixed support member 33 to slide out of the adjustment slide groove 322, so that the two ends of the aluminum profile can smoothly extend into the clamping grooves 341 provided on the two clamping blocks 34, and the telescopic pressure rod 36 is started to drive the pressure plate 35 to move and press the aluminum profile in the clamping groove 341, and the driving device is started to drive the two sliders 31 to drive the fixed support member 33 to slide out of the adjustment slide groove 322. The aluminum profile moves toward the shaping device 2. When the aluminum profile contacts the arc-shaped positioning plate 29 and the steel belt 221, the driving member 321 drives the connecting block 32 to rotate, thereby driving the fixed support member 33 and the clamping block 34 to rotate away from the shaping device 2. At the same time, the telescopic end of the telescopic push rod 332 continues to extend as the connecting block 32 rotates, compensating for the reduction in the distance between the two ends of the profile due to bending after the profile is stretched and bent. The rotation of the connecting block 32 avoids the deformation of the end of the aluminum profile when it is stretched, thereby ensuring that the aluminum profile can be stretched and bent smoothly.

[0068] At the same time, when the aluminum profile contacts the shaping device 2, the hydraulic cylinder 43 is started to push out its telescopic end and drive the tightening member 42 to move toward the profile until the tightening member 42 contacts the profile. At this time, the tightening member 42 tightens the bent part of the profile against the shaping device 2, thereby improving the shaping efficiency of the aluminum profile after bending and ensuring the shaping effect of the aluminum profile after bending.

[0069] After the bending is completed, the telescopic end of the hydraulic cylinder 43 is retracted and drives the tensioning member 42 away from the aluminum profile. The driving device drives the two sliders 31 to move in the opposite direction, so that the aluminum profile after the bending is separated from the arc positioning plate 29 and the steel belt 221. The telescopic pressure rod 36 is started to retract its telescopic end and drive the pressure plate 35 to reset. At this time, the aluminum profile after the bending can be taken out, and then the driving member 321 is started to drive the connecting block 32 to rotate in the opposite direction and reset. The telescopic push rod 332 is started to retract its telescopic end and drive the fixed support member 33 to slide into the adjusting slide groove 322 and reset. The telescopic end of the lifting drive mechanism 291 is controlled to be retracted, so that it drives the arc positioning plate 29 to descend and reset. The winding motor 223 is started to drive the winding wheel 225 to rotate through the winding shaft 224. At this time, the winding wheel 225 starts to rewind the steel belt 221, so that the steel belt 221 outside the winding drum 22 is retracted into the winding drum 22.

[0070] In other embodiments, the number of arc-shaped positioning plates 29 may be increased or decreased according to actual conditions, or there may be only one arc-shaped positioning plate 29 .

[0071] In other embodiments, the roller 226 on the rear side of the take-up drum 22 may be eliminated.

[0072] In other embodiments, the winding drum 22 may be eliminated, in which case the winding roller and the winding motor 223 are exposed to the outside, but the functions of releasing the steel strip 221 and winding the steel strip 221 can still be realized.

[0073] In this embodiment, the lower end of the steel belt 221 extends to the bottom of the support roller 261. In other embodiments, the lower end of the steel belt 221 may be flush with the lower end of the support roller 261, or located above the lower end of the support roller 261. In this case, the circumferential distance between two adjacent telescopic support members 26 needs to be increased so that the arc-shaped positioning plate 29 can extend between two adjacent telescopic support members 26 when in use.

[0074] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An automatic bending machine, comprising a base, a shaping device, and a profile clamping assembly slidably mounted on the base along the front-rear direction, wherein the shaping device comprises an arc-shaped positioning plate with an opening facing backward, characterized in that: The shaping device also includes a lifting drive mechanism for driving the arc-shaped positioning plate to lift and lower, a support mechanism located at the rear side of the arc-shaped positioning plate, a reeling mechanism located at the rear side of the support mechanism, and a belt winding mechanism arranged on the support mechanism; The winding mechanism includes a belt roller with an axis extending up and down, a steel belt wound on the winding shaft, and a winding motor driving the belt roller to rotate to wind up the steel belt; The support mechanism includes a support column coaxially arranged with the arc-shaped positioning plate, a fixed ring fixedly sleeved on the support column, and a plurality of telescopic support members evenly distributed on the fixed ring, wherein the plurality of telescopic support members are telescopic along the radial direction of the support column and jointly support the steel belt; The belt winding mechanism comprises a rotating ring installed on the top of the support column and rotating around an axis extending up and down, and a telescopic arm installed on the rotating ring and extending and retracting along the radial direction of the support column, and the end of the telescopic arm is connected to one end of the steel belt; Each telescopic support has an extended state and a retracted state. When in the extended state, the telescopic arm extends and rotates with the rotating ring to pull the steel belt, and the steel belt is wound around the end of each telescopic support to form a steel belt loop. The lifting drive mechanism drives the arc-shaped positioning plate to rise to the inside of the steel belt loop; when in the retracted state, the telescopic arm retracts and the winding motor winds up the steel belt and makes the steel belt fit on the arc surface on the front side of the arc-shaped positioning plate. The telescopic support member comprises a first telescopic rod, an ear plate and a support roller, wherein the first telescopic rod is mounted on a fixed ring, the ear plates have two ears and are spaced apart from each other on the telescopic end of the first telescopic rod, the support roller is rotatably mounted on the two ear plates, and the rotation axis of the support roller is parallel to the axis of the support column; The belt winding mechanism also includes a driving assembly for driving the rotating ring to rotate, and the driving assembly includes a driving motor, an inner gear ring, a gear and a transmission shaft. An annular groove is opened on the inner wall of the rotating ring, and the inner gear ring is fixedly installed in the annular groove. A transmission groove is opened on the side wall of the support column, and the gear is located in the transmission groove and meshes with the inner gear ring. The upper end of the transmission shaft penetrates into the transmission groove and is fixedly installed in the gear, and the lower end of the transmission shaft penetrates through the support column and the seat body and extends to the bottom of the seat body. The driving motor is arranged at the bottom of the seat body and is connected to the transmission shaft.

2. The automatic stretch bending machine according to claim 1, characterized in that: The width of the steel belt is greater than the length of the supporting roller, and the bottom edge of the steel belt extends downwardly out of the supporting roller.

3. The automatic stretch bending machine according to claim 1, characterized in that: The telescopic arm comprises a second telescopic rod and a fixing piece. The second telescopic rod is mounted on a rotating ring. The fixing piece is mounted on a telescopic end of the second telescopic rod and extends downward. The fixing piece is connected to the steel belt.

4. An automatic stretch bending machine according to any one of claims 1 to 3, characterized in that: The winding mechanism also includes a winding drum, in which the belt winding roller and the winding motor are both located. An outlet slot is provided on the top of the outer wall of the winding drum, and one end of the steel belt passes through the outlet slot and is connected to the telescopic arm.

5. The automatic stretch bending machine according to claim 4, characterized in that: A plurality of slots are provided on one side of the outer wall of the winding drum away from the support column, and rollers whose axes are parallel to the axis of the winding drum are rotatably installed in the plurality of slots. The rollers are used to support the steel belt when the steel belt is wound around the outside of the winding drum.

6. An automatic stretch bending machine according to any one of claims 1-3, characterized in that: There are multiple arc-shaped positioning plates arranged coaxially, and each arc-shaped positioning plate is correspondingly provided with the lifting drive mechanism.

7. An automatic stretch bending machine according to any one of claims 1-3, characterized in that: The top of the seat body is provided with a mounting groove, the shaping device is arranged in the mounting groove, and the profile clamping assembly is arranged on the top surface of the seat body.

8. An automatic stretch bending machine according to any one of claims 1-3, characterized in that: The profile clamping assembly includes two clamping units arranged at intervals on the left and right, and the clamping unit includes a slider slidably assembled on the seat body along the front-to-back direction, a connecting block rotatably mounted on the slider around an axis extending up and down, a fixed support block in the connecting block telescopically assembled along the left and right directions, and a clamping block fixedly mounted on the fixed support block, a clamping groove for the end of the profile to extend into is provided in the clamping block, and a pressure plate for pressing the profile in the clamping groove and a telescopic pressure rod for driving the pressure plate to move are also provided on the clamping block.

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