A draw-bender for detecting feedback shaping control

Abstract

The application discloses a kind of detection feedback shaping control's pull bending device, comprising: base;Profile fixing piece, be located on base;Fixed mould, be located on base, fixed mould has the curved surface of making the bending shaping of the profile to be pulled and bent;Guide rail, be located on base;Movable mould, be located on guide rail, can slide along guide rail;Movable mould is fixedly connected with multiple telescopic lifting rods on it, and the end of lifting rod is equipped with pressing mould;Heating unit, be located on lifting rod;First pressure sensor, be located on the curved surface of fixed mould;Temperature sensor, be located on pressing mould;And control panel, be located on base, control panel and movable mould, lifting rod, first pressure sensor, heating unit and temperature sensor are electrically connected by wire.This pull bending device can realize the accurate plastic forming of profile, improve the pull bending quality of profile, effectively reduce the rebound amount after profile pull bending, guarantee the forming size precision of bending piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stretch bending forming equipment,

[0002] In particular, the present application relates to a stretch bending device for detecting and feeding back forming control. BACKGROUND

[0003] Stretch bending refers to a bending process in which a workpiece is bent into a die groove while being subjected to a tangential tension to change the stress state in the cross section of the workpiece. The stretch bending forming process has been widely used in the manufacture of aircraft and automobile profile bending parts, such as the bending forming of aircraft fuselages, wings, inlet duct partitions, and the bending forming of hollow aluminum materials for automobile body structures and bumpers.

[0004] However, the existing stretch bending device is difficult to achieve closed-loop control of profile plastic forming, and the profile after stretch bending will produce springback phenomenon, it is difficult to accurately predict the final forming effect of the profile, and the fluctuation of the stretch bending load will lead to low profile forming quality and reduce the forming precision of the bending part. If real-time detection of the stretch bending process can be achieved, and according to the detection results, the tension and heating temperature are applied to each bending point of the profile, the forming effect of the profile can be effectively improved, and the forming precision of the profile can be improved. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a stretch bending device for detecting and feeding back forming control.

[0006] To solve the above problems, the present application adopts the following technical scheme:

[0007] A stretch bending device for detecting and feeding back forming control, comprising:

[0008] a base;

[0009] a profile fixing member provided on the base and used for fixing both ends of a profile to be stretch bent;

[0010] a fixed die provided on the base, the fixed die having a curved surface for bending and forming the profile to be stretch bent;

[0011] a guide rail provided on the base;

[0012] a movable die provided on the guide rail and capable of sliding along the guide rail, a plurality of telescopic lifting rods being fixedly connected to the movable die, and a pressing die being provided at the end of each lifting rod;

[0013] a heating unit provided on the lifting rod and used for heating the pressing die;

[0014] a first pressure sensor provided on the curved surface of the fixed die and used for detecting the pressure at each point on the curved surface of the fixed die;

[0015] a temperature sensor arranged on the compression mold for detecting the temperature of the compression mold;

[0016] a control panel arranged on the base, the control panel being electrically connected with the movable mold, the lifting rod, the first pressure sensor, the heating unit and the temperature sensor through wires; the control panel receiving the pressure and temperature signals of the first pressure sensor and the heating unit and controlling the sliding of the movable mold on the guide rail; the control panel controlling the lifting and lowering of the lifting rod and the heating of the heating unit.

[0017] Preferably, the profile fixing members are symmetrically arranged on the base, and the profile fixing members comprise:

[0018] an arm driving device arranged on the base;

[0019] a telescopic rod having one end fixedly connected to the arm driving device;

[0020] a clamp fixedly connected to the other end of the telescopic rod for clamping the profile to be drawn and bent;

[0021] a second pressure sensor arranged on the clamp for detecting the pressure on the clamp;

[0022] the arm driving device is used for driving the telescopic rod to extend and retract, the clamp and the second pressure sensor are electrically connected with the control panel through wires, and the control panel receives the pressure signal of the second pressure sensor and controls the clamping force of the clamp.

[0023] Preferably, the control panel controls the end of the lifting rod to press into a curved surface consistent with the curved surface of the fixed mold, and C is an arbitrary constant.

[0024] Preferably, the compression mold and the end of the lifting rod are fixedly connected through a universal joint.

[0025] Preferably, the end surface of the compression mold is a curved surface.

[0026] Preferably, the fixed mold and the base are detachably connected.

[0027] Preferably, the lifting rod is a hydraulic lifting rod.

[0028] Preferably, the telescopic rod is a hydraulic telescopic rod.

[0029] Compared with the prior art, the technical effects of the present application are embodied in:

[0030] The drawing bending device for detecting feedback forming control provided by the embodiment of the present application fixes the two ends of the profile to be drawn and bent on the base through the profile fixing piece, and draws and bends the profile into shape through the cooperation of the movable die and the fixed die. Since the movable die is fixedly connected with multiple telescopic lifting rods, the end of each lifting rod is provided with a pressing die, so that different forces can be applied to each point of the profile to be drawn and bent, which is beneficial to the drawing and bending forming of the profile. Meanwhile, the control panel carries out different heating temperature treatment for each point of the profile to be drawn and bent according to the pressure and temperature feedback of the first pressure sensor and the temperature sensor, so that the accurate plastic forming of the profile can be realized, the drawing and bending quality of the profile is improved, the rebound amount after the drawing and bending of the profile is effectively reduced, and the forming size precision of the bent part is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A structure schematic view of the drawing bending device for detecting feedback forming control provided by the embodiment of the present application is shown in the figure.

[0032] Figure 2 A partial enlarged structure schematic view of the movable die provided by the embodiment of the present application is shown in the figure.

[0033] Figure 3 A structure schematic view of the lifting rod provided by the embodiment of the present application is shown in the figure.

[0034] In the figure, 1 is the base, 2 is the profile fixing piece, 3 is the fixed die, 4 is the guide rail, 5 is the movable die, 6 is the heating unit, 7 is the first pressure sensor, 8 is the temperature sensor, 9 is the control panel, 10 is the wire, 11 is the second pressure sensor, 201 is the swing arm driving device, 202 is the telescopic rod, 203 is the clamp, 501 is the lifting rod, 502 is the pressing die, and 503 is the universal joint. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0036] The embodiment of the present application provides a drawing bending device for detecting feedback forming control, and the structure is as shown in Figure 1 、 Figure 2 、 Figure 3As shown. A detection feedback forming control's stretch bending device, including base 1, profile fixing piece 2, fixed die 3, guide rail 4, movable die 5, heating unit 6, first pressure sensor 7, temperature sensor 8 and control panel 9. Profile fixing piece 2 is arranged on base 1, and is used for fixing the two ends of the profile to be stretched and bent;Fixed die 3 is arranged on base 1, and the fixed die 3 has a curved surface for bending the profile to be stretched and bent;Guide rail 4 is arranged on base 1;Movable die 5 is arranged on guide rail 4 and can slide along guide rail 4;Movable die 5 is fixedly connected with a plurality of telescopic lifting rods 501, and the end of each lifting rod 501 is provided with a pressing die 502;Heating unit 6 is arranged on lifting rod 501 and is used for heating pressing die 502;First pressure sensor 7 is arranged on the curved surface of fixed die 3 and is used for detecting the pressure of each point on the curved surface of fixed die 3;Temperature sensor 8 is arranged on pressing die 502 and is used for detecting the temperature of pressing die 502;Control panel 9 is arranged on base 1, and control panel 9 is electrically connected with movable die 5, lifting rod 501, first pressure sensor 7, heating unit 6 and temperature sensor 8 through wire 10.

[0037] When the stretch bending device of the present application works, the two ends of the profile to be stretched and bent are fixed by profile fixing piece 2, so that the profile to be stretched and bent is attached to the curved surface of fixed die 3, and the preliminary forming of the profile to be stretched and bent is completed;Then control panel 9 controls movable die 5 to slide on guide rail 4, so that movable die 5 approaches fixed die 3, when the pressing die 502 at the end of the plurality of telescopic lifting rods 501 fixedly connected with movable die 5 contacts the profile to be stretched and bent, control panel 9 receives the pressure signal of first pressure sensor 7 installed on the curved surface of fixed die 3, controls the lifting rods 501 at different positions to lift to different heights, so as to respectively apply different forces to each point of the profile to be stretched and bent;And control panel 9 controls heating unit 6 to heat the pressing die 502 on each point of the profile to be stretched and bent to different temperatures according to the received pressure signal of first pressure sensor 7, so as to facilitate the stretch bending forming of the profile, realize the accurate plastic forming of the profile, improve the stretch bending quality of the profile, effectively reduce the rebound amount of the profile after stretch bending, and ensure the forming size precision of the bent part.

[0038] After the stretch bending forming is completed, control panel 9 controls the lifting rods 501 of movable die 5 on guide rail 4 to descend, so that pressing die 502 is separated from the profile, then the profile fixing piece 2 is loosened, the two ends of the profile are unloaded, the formed profile is taken out, and the stretch bending process is completed. Repeat the above operation to complete the stretch bending of the next profile.

[0039] Preferably, the profile fixing components 2 are symmetrically arranged on the base 1. The profile fixing components 2 include a swing arm drive device 201, a telescopic rod 202, and a clamp 203. The swing arm drive device 201 is located on the base 1; one end of the telescopic rod 202 is fixedly connected to the swing arm drive device 201; the clamp 203 is fixedly connected to the other end of the telescopic rod 202 and is used to clamp the profile to be bent. A second pressure sensor 11 is provided on the clamp 203 to detect the pressure on the clamp 203; the swing arm drive device 201 is used to drive the telescopic rod 202 to extend and retract; the clamp 203 and the second pressure sensor 11 are electrically connected to the control panel 9 through a wire 10; the control panel 9 receives the pressure signal from the second pressure sensor 11 and controls the clamping force of the clamp 203. During operation, the profile to be bent is placed on clamp 203, which clamps both ends of the profile to fix it in place. The bending curve trajectory of the profile is controlled by the swing arm drive device 201, and the position of clamp 203 is changed by controlling the extension length of the telescopic rod 202, so that the profile to be bent fits against the curved surface of the fixed mold 3, completing the initial forming of the profile bending. The second pressure sensor 11 on clamp 203 and the first pressure sensor 7 on fixed mold 3 transmit the measured pressure data to the control panel 9 through wire 10.

[0040] After the bending process is completed, the control panel 9 first controls the lifting rod 501 of the moving mold 5 on the guide rail 4 to descend, so that the pressure mold 502 separates from the profile. Then, the control panel 9 controls the clamp 203 to release the profile from the clamp 203, and removes the formed profile, completing the entire bending process of the profile. The above operation is repeated to complete the next bending of the profile.

[0041] Preferably, the control panel 9 controls the end of the lifting rod 501 to press... The lifting rods 501 are arranged to form a curved surface that matches the curved surface of the fixed mold 3, where C is an arbitrary constant. An arbitrary curve equation can be simulated based on three points. By adjusting the height of the end of the lifting rod 501 via the control panel 9, the trajectory of the curved surface of the fixed mold 3 can be accurately simulated. This ensures that the curved surface formed by the lifting rods 501 on the moving mold 5 matches the curved surface of the fixed mold 3, allowing the profile to be bent to be precisely formed under the combined action of the pressure mold 502 of the fixed mold 3 and the moving mold 5.

[0042] Preferably, the ends of the pressing die 502 and the lifting rod 501 are fixedly connected by a universal joint 503. The universal joint 503 can better enable the pressing die 502 to contact the surface of the profile to be bent, making the surface of the profile to be bent more uniformly stressed, reducing the amount of springback after bending, and improving the bending quality.

[0043] Preferably, the end face of the die 502 is a curved surface. In this way, the end face of the die 502 is a curved surface with a certain curvature, which is more conducive to the die 502 to better fit the surface of the profile to be drawn and bent, so that the surface of the profile to be drawn and bent is subjected to more uniform stress, reduces the springback amount of the profile after drawing and bending, and improves the drawing and bending quality.

[0044] Preferably, the fixed die 3 is detachably connected with the base 1. For example, the fixed die 3 is fixedly connected with the base 1 through bolts. In this way, different fixed dies 3 can be conveniently replaced when producing profiles of different models, and the profile surface formed by the dies 502 of the movable die 5 can also be adjusted according to the curved surface of the different fixed dies 3 through the control panel 9, so that the profile surface formed by the dies 502 of the movable die 5 is consistent with the curved surface of the fixed die 3.

[0045] Preferably, the lifting rod 501 is a hydraulic lifting rod, and the telescopic rod 202 is a hydraulic telescopic rod. The hydraulic drive mode is more conducive to automatic control, and is stable in transmission and fast in response, which is suitable for mechanical design, manufacturing and application.

[0046] The present application is not limited to the above specific embodiments, and various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made to the above embodiments according to the technical essence of the present application shall be included in the protection scope of the present application.

Claims

1. A tension bending device for detection feedback forming control, characterized in that, include: Base; A profile fixing component, located on the base, is used to fix both ends of the profile to be bent. A fixed mold is disposed on the base, and the fixed mold has a curved surface that allows the profile to be bent into shape; The guide rail is mounted on the base. A movable mold is mounted on the guide rail and can slide along the guide rail; multiple telescopic lifting rods are fixedly connected to the movable mold, and the ends of the lifting rods are provided with pressure molds; A heating unit, mounted on the lifting rod, is used to heat the pressing mold; A first pressure sensor is installed on the curved surface of the fixed mold to detect the pressure at various points on the curved surface of the fixed mold. A temperature sensor is installed on the mold to detect the temperature of the mold; and A control panel is mounted on the base. The control panel is electrically connected to the moving mold, the lifting rod, the first pressure sensor, the heating unit, and the temperature sensor via wires. The control panel receives pressure and temperature signals from the first pressure sensor and the heating unit, and controls the moving mold to slide on the guide rail. The control panel controls the lifting and lowering of the lifting rod and controls the heating unit to heat, and controls the heating unit to heat the molds at different points on the profile to be bent to different temperatures according to the pressure signal received from the first pressure sensor. The profile fasteners are symmetrically disposed on the base, and the profile fasteners include: A swing arm drive device is mounted on the base; The telescopic rod has one end fixedly connected to the swing arm drive device; Clamps, fixedly connected to the other end of the telescopic rod, are used to clamp the profile to be bent; and A second pressure sensor is mounted on the clamp and is used to detect the pressure on the clamp. The swing arm drive device is used to drive the telescopic rod to extend and retract. The clamp and the second pressure sensor are electrically connected to the control panel via wires. The control panel receives the pressure signal from the second pressure sensor and controls the clamping force of the clamp. The control panel controls the end of the lifting boom to press... Arranged into a curved surface that matches the curved surface of the fixed mold, where C is an arbitrary constant.

2. The bending device for detection feedback forming control as described in claim 1, characterized in that, The mold and the end of the lifting rod are fixedly connected by a universal joint.

3. A bending device for detection feedback forming control as described in any one of claims 1-2, characterized in that, The end face of the mold is a curved surface.

4. The bending device for detection feedback forming control as described in claim 3, characterized in that, The mold and the base are detachably connected.

5. The bending device for detection feedback forming control as described in claim 4, characterized in that, The lifting rod is a hydraulic lifting rod.

6. The tension bending device for detection feedback forming control as described in claim 5, characterized in that, The telescopic rod is a hydraulic telescopic rod.

Images