A device and method for straightening and stretching complex cavity profiles

Abstract

The embodiment of the present invention discloses a device for straightening and stretching a complex hollow profile, comprising a guide rail, a first hydraulic device, a main component, a pressing mechanism, a rotating arm, a second hydraulic device, a special clamp and a third hydraulic device; the second hydraulic device is arranged on the upper part of the main component and connected to the rotating arm; the rotating arm is fixedly connected to the pressing mechanism; a clamping pad cooperating with the pressing mechanism is arranged below the pressing mechanism; the special clamp is connected to the third hydraulic device; the special clamp comprises a fixed chuck group and a movable chuck group; the fixed chuck group comprises a plurality of fixed chucks arranged at a predetermined distance from each other. The embodiment of the present invention also discloses a method for straightening and stretching a complex hollow profile. By using the above-mentioned device or method, the connecting ribs of the aluminum material can be clamped and fixed by the special clamp, and the clamping position is closer to the center of the aluminum material, so that the hollow profile can be effectively straightened and stretched, and the deformation of the clamping part is small.

Description

Technical Field

[0001] The invention relates to the field of metal processing, and in particular to a device and method for straightening and stretching a complex cavity profile. Background Art

[0002] In the aluminum processing industry, extruded products occupy a very important position, and the main method of producing aluminum alloy profiles is through extrusion. Extrusion refers to a plastic processing method that uses an extrusion rod to press the ingot in the extrusion cylinder out of a specific die hole, or flow into a specific gap to form. Common extrusion methods include forward extrusion, reverse extrusion, lateral extrusion, continuous extrusion and other extrusion methods.

[0003] The extrusion of profiles, especially hollow profiles, usually adopts hot extrusion. That is, the ingot is heated to a certain temperature, and under the action of the extrusion shaft, the ingot is passed through a specific die at a certain speed, and then supplemented with a specific cooling method and subsequent treatment to meet the use requirements. Among them, thin-walled profiles are mostly produced by extrusion of 6063 alloy.

[0004] During the material forming process, the profiles usually have different degrees of bending due to the difference in material wall thickness, mold, traction, cooling method, etc. In order to ensure the usability of the product, the straightening process is essential.

[0005] In addition, due to cooling, the product organization will have residual internal stress of varying degrees. The usual way to eliminate internal stress is to increase the amount of stretching, and control it between 1 and 3%. The purpose is to make more vacancies and dislocations appear inside the alloy organization, and in the subsequent aging process, the dislocations of opposite signs offset each other due to movement, thereby eliminating lattice distortion. Because 80% of the internal stress is the third type of internal stress caused by lattice distortion, the reduction of lattice distortion can effectively eliminate internal stress. In the production process, in order to ensure production efficiency and delivery efficiency, straightening and stretching are usually carried out simultaneously.

[0006] In the traditional extrusion production process, straightening machines or stretching machines are all downward-pressing. This method is convenient for straightening and stretching solid materials or profiles with thick walls. However, it is not suitable for profiles with large cavities and high flatness requirements, because the downward pressure is large, the clamping section is severely deformed, and the profiles are mostly concave and cannot be reshaped due to the straightening force. To solve this problem, the method of manually installing a pad before straightening each profile is usually adopted. After stretching, the pad needs to be manually removed and then installed again when the next profile is stretched. This cycle is repeated, which is cumbersome and labor-intensive. Summary of the invention

[0007] In order to solve the technical problems of complicated operation and high labor intensity of existing straightening and stretching equipment, the embodiments of the present invention provide a device and method for straightening and stretching complex cavity profiles, which clamp and fix the connecting ribs of the aluminum material, and the clamping position is closer to the center of the aluminum material, so that the cavity profile can be effectively straightened and stretched, and the deformation of the clamping part is small.

[0008] In order to solve the above technical problems, an embodiment of the present invention provides a complex cavity profile straightening and stretching device, including a guide rail, a first hydraulic device, a main component, a pressing mechanism, a rotating arm, a second hydraulic device, a special clamp and a third hydraulic device; the first hydraulic device is fixedly connected to the guide rail through a fixed support, the first hydraulic device is connected to the main component, a pulley is provided on the main component, and the main component can be driven by the first hydraulic device to move along the guide rail; the second hydraulic device is arranged on the upper part of the main component and is connected to the rotating arm; a receiving groove is provided in the middle part of the main component, and the pressing mechanism is arranged in the receiving groove and can Swing up and down; the rotating arm is fixedly connected to the pressing mechanism, and the second hydraulic device can drive the rotating arm to swing up and down, thereby driving the pressing mechanism to swing up and down; a clamping pad that cooperates with it is provided under the pressing mechanism, and the special clamp is arranged between the pressing mechanism and the clamping pad; the special clamp is connected to the third hydraulic device, and the third hydraulic device can drive the special clamp to move laterally; the special clamp includes a fixed chuck group and a movable chuck group; the fixed chuck group includes a plurality of fixed chucks arranged at a predetermined distance from each other; the fixed chuck group and the movable chuck group can cooperate with each other to clamp and fix the connecting ribs in the profile cavity.

[0009] As an improvement of the above solution, the movable chuck group includes a plurality of movable chucks, and the movable chuck and the fixed chuck each include two clamping claws that are arranged opposite to each other at a predetermined distance.

[0010] As an improvement of the above scheme, the fixed chuck group and the movable chuck group can cooperate with each other to clamp and fix the connecting ribs in the profile cavity, which means that the movable chuck group can translate up and down, and cooperate with the fixed chuck group to clamp and fix the connecting ribs located in the fixed chuck group and the movable chuck group.

[0011] As an improvement of the above-mentioned scheme, the special clamp also includes a connecting body, which includes a disc part and connecting claws arranged on the upper and lower sides and left and right sides of the disc part; a hydraulic chamber and a piston are arranged in the connecting claw; the fixed chuck is arranged at the front end of the connecting claw, and the movable chuck is connected to the piston.

[0012] As an improvement of the above scheme, the pressing mechanism is connected to the main component via a rotating shaft; the pressing mechanism is fixedly connected to the rotating shaft, and the rotating shaft can rotate relative to the main component; the rotating shaft passes through the main component, and its two ends are fixedly connected to the rotating arm.

[0013] As an improvement of the above solution, the pressing mechanism is composed of a plurality of metal blocks, which are arranged opposite to each other at a predetermined distance; and the lower part of the metal block has an elliptical arc surface.

[0014] As an improvement of the above solution, the first hydraulic device, the second hydraulic device and the third hydraulic device are hydraulic cylinders of different sizes.

[0015] As an improvement of the above solution, the elliptical arc surface and / or the clamping pad are provided with anti-slip stripes.

[0016] Accordingly, an embodiment of the present invention further provides a method for straightening and stretching a complex cavity aluminum material, comprising the following steps:

[0017] 1. The profile is extruded by the extruder, passes through the online cooling system, is interrupted by the interruption saw, and then is pulled by the traction machine to the material bed of the rear extrusion equipment, and then horizontally transmitted to the straightening machine for straightening and stretching;

[0018] 2. When the hollow profile is straightened and stretched for the first time, the third hydraulic device is controlled separately on the control panel of the straightening machine to extend the telescopic rod, and the special clamp (designed and manufactured in advance for the produced profile) is installed on the end of the telescopic rod. This step does not need to be repeated for subsequent straightening and stretching;

[0019] 3. By precisely controlling the transmission displacement of the profile, it is located in the middle part of the front and rear straightening machines, and the second hydraulic device is started to drive the pressing mechanism. The pressing mechanism has two-step movement. In the first step, the elliptical arc surface of the metal block of the pressing mechanism is pressed down to the profile so that it can just fix the profile. The third hydraulic device is started to push the special clamp into the profile cavity. In the second step, the movable chuck group of the special clamp is translated up and down, and the connecting ribs located in the fixed chuck group and the movable chuck group are clamped and fixed with the fixed chuck group to clamp the profile; the pressing mechanism loosens the profile.

[0020] 4. Set the stretching length according to the process, start the first hydraulic device, move the main component backward, and stretch the profile longitudinally.

[0021] 5. After stretching, the fixed chuck group and the movable chuck group of the special fixture are reset, the special fixture is detached from the inner cavity of the profile, and the profile is transferred from the material bed to the finished product sawing position.

[0022] 6. Repeat steps 3 to 5 to straighten and stretch other profiles.

[0023] Implementing the embodiments of the present invention has the following beneficial effects:

[0024] Since large-section cavity profiles are often designed with connecting ribs inside, the connecting ribs are used to strengthen the surface of the cavity profile on the one hand, and are used as the connection parts between the profile and other parts on the other hand. Using the above method, the connecting ribs of the aluminum material are clamped and fixed by the special clamp, and the clamping position is closer to the center of the aluminum material, so that the cavity profile can be effectively straightened and stretched, and the deformation of the clamping part is small. After straightening using the device, the flatness requirements can basically be met after the head and tail waste are removed. The fixed chuck group and the movable chuck group of the special clamp are respectively composed of a number of fixed chucks and movable chucks set at a predetermined distance from each other. The gap between the chucks matches the connecting ribs, which can match the connecting ribs of different types of aluminum materials and have a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a device for straightening and stretching a complex cavity profile according to the present invention;

[0026] Figure 2 It is a structural schematic diagram of a pressing mechanism and a special clamp of a device for straightening and stretching a complex cavity profile of the present invention;

[0027] Figure 3 It is a cross-sectional view of a device for straightening and stretching a complex cavity profile according to the present invention;

[0028] Figure 4 yes Figure 3 A magnified view of part A;

[0029] Figure 5 It is a structural schematic diagram of a special clamp for a complex cavity profile straightening and stretching device of the present invention;

[0030] Figure 6 It is a cross-sectional view of an aluminum material to be straightened in a complex hollow profile straightening and stretching device of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0032] like Figure 1-Figure 6As shown, a specific embodiment of the present invention provides a complex cavity profile straightening and stretching device, including a guide rail 1, a first hydraulic device 2, a main component 3, a pressing mechanism 4, a rotating arm 5, a second hydraulic device 6, a special clamp 7 and a third hydraulic device 8; the first hydraulic device 2 is fixedly connected to the guide rail 1 through a fixed support 9, the first hydraulic device 2 is connected to the main component 3, a pulley 10 is provided on the main component 3, and the main component 3 can be driven by the first hydraulic device 2 to move along the guide rail 1; the second hydraulic device 6 is arranged on the upper part of the main component 3 and connected to the The main component 3 is connected with the rotating arm 5; a receiving groove 31 is provided in the middle of the main component 3, and the pressing mechanism 4 is arranged in the receiving groove 31 and can swing up and down; the rotating arm 5 is fixedly connected to the pressing mechanism 4, and the second hydraulic device 6 can drive the rotating arm 5 to swing up and down, thereby driving the pressing mechanism 4 to swing up and down; a clamping pad 11 cooperating with it is provided below the pressing mechanism 4, and the special clamp 7 is arranged between the pressing mechanism 4 and the clamping pad 11, and the special clamp 7 is connected with the third hydraulic device 8, and the third hydraulic device 8 can drive the special clamp 7 to move laterally.

[0033] The special clamp 7 includes a fixed clamp group 71 and a movable clamp group 72; the fixed clamp group 71 includes a plurality of fixed clamps 711 arranged at a predetermined distance from each other; the movable clamp group 72 includes a plurality of movable clamps 721. The fixed clamp group 71 and the movable clamp group 72 can cooperate with each other to clamp and fix the connecting ribs in the cavity of the profile.

[0034] Since the hollow profiles with large cross-sections are often designed with connecting ribs 14, the connecting ribs 14 are used to strengthen the surface of the hollow profiles on the one hand, and are used as the connecting parts of the profiles and other parts on the other hand. Using the above method, the connecting ribs 14 of the aluminum material are clamped and fixed by the special clamp 7, and the clamping position is closer to the center of the aluminum material, which can effectively straighten and stretch the hollow profile, and the deformation of the clamping part is small. After straightening using the device, the flatness requirements can be basically met after the head and tail waste are removed. The fixed chuck group 71 and the movable chuck group 72 of the special clamp 7 are respectively composed of a plurality of fixed chucks and movable chucks set at a predetermined distance from each other. The gap between the chucks matches the connecting ribs 14, which can match the connecting ribs 14 of different types of aluminum materials, and has a wide range of applications.

[0035] Preferably, the movable clamp 721 and the fixed clamp 711 each include two clamping claws 73 that are oppositely arranged at a predetermined distance from each other.

[0036] The fixed chuck group 71 and the movable chuck group 72 can cooperate with each other to clamp and fix the connecting rib 14 in the cavity of the profile, which means that the movable chuck group 72 can translate up and down, and cooperate with the fixed fixed chuck group 71 to clamp and fix the connecting rib 14 located in the fixed chuck group 71 and the movable chuck group 72. By relatively translating, the connecting rib 14 of the aluminum material can be reliably clamped by shear force, and the clamping is more firm.

[0037] Specifically, the special clamp 7 also includes a connecting body 74, which includes a disc portion 741 and connecting claws 742 provided on the upper and lower sides and the left and right sides of the disc portion 741; a hydraulic chamber 743 and a piston 744 are provided in the connecting claw 742; the fixed clamp 711 is provided at the front end of the connecting claw 742, and the movable clamp 721 is connected to the piston 744. The hydraulic chamber 743 can push the piston 744 to move up and down by passing hydraulic oil, thereby driving the movable clamp group 72 connected thereto to move up and down.

[0038] The pressing mechanism 4 is connected to the main component 3 via a rotating shaft 12; the pressing mechanism 4 is fixedly connected to the rotating shaft 12, and the rotating shaft 12 can rotate relative to the main component 3. The rotating shaft 12 passes through the main component 3, and its two ends are fixedly connected to the rotating arm 5. Since there are often a lot of aluminum debris in aluminum production workshops, the above debris is easy to fall into various movable elements, hindering the movement of each movable element. The pressing mechanism 4 is driven by the rotating arm 5 of the above shape, and the movement of the pressing mechanism 4 is stable and not easily affected by the debris, which meets the actual use needs on site.

[0039] Preferably, the pressing mechanism 4 is composed of a plurality of metal blocks 41, which are arranged opposite to each other at a predetermined distance; the lower part of the metal block 41 has an elliptical arc surface 411. With the above structure, the intervals of the metal blocks 41 can avoid the thin sheet-like protrusions that may appear on the surface of the aluminum material, so that the pressing mechanism 4 is clamped on the force-bearing surface of the aluminum material; in addition, the pressing mechanism 4 with the above structure can also increase the friction coefficient of the aluminum material, making the clamping more secure.

[0040] Preferably, the first hydraulic device 2, the second hydraulic device 6 and the third hydraulic device 8 are hydraulic cylinders of different sizes.

[0041] Preferably, in order to improve the friction coefficient of the pressing mechanism 4 and / or the clamping pad 11 , anti-slip stripes 13 are provided on the elliptical arc surface 411 and / or the clamping pad 11 .

[0042] A specific embodiment of the present invention further provides a method for straightening and stretching a complex cavity aluminum material, comprising the following steps:

[0043] 1. The profile is extruded by the extruder, passes through the online cooling system, is interrupted by the interruption saw, and then is pulled by the traction machine to the material bed of the rear extrusion equipment, and then horizontally transmitted to the straightening machine for straightening and stretching;

[0044] 2. When the hollow profile is straightened and stretched for the first time, the third hydraulic device 8 is controlled separately on the control panel of the straightening machine to extend the telescopic rod, and the special clamp 7 (designed and manufactured in advance for the produced profile) is installed on the end of the telescopic rod. This step does not need to be repeated for subsequent straightening and stretching;

[0045] 3. By precisely controlling the transmission displacement of the profile so that it is located in the middle of the front and rear straightening machines, the second hydraulic device 6 is started to drive the pressing mechanism 4. The pressing mechanism 4 moves in two steps. In the first step, the elliptical arc surface 411 of the metal block 41 of the pressing mechanism 4 is pressed down to the profile so that it can just fix the profile. The third hydraulic device 8 is started to push the special clamp 7 into the profile cavity. In the second step, the movable chuck group 72 of the special clamp 7 is translated up and down, and the fixed chuck group 71 is fixedly set to clamp the connecting ribs 14 located in the fixed chuck group 71 and the movable chuck group 72 to fix the profile; the pressing mechanism 4 loosens the profile.

[0046] 4. Set the stretching length according to the process, start the first hydraulic device 2, and move the main component 3 backward to stretch the profile longitudinally.

[0047] 5. After stretching is completed, the fixed chuck group 71 and the movable chuck group 72 of the special fixture 7 are reset, the special fixture 7 is separated from the inner cavity of the profile, and the profile is transferred from the material bed to the finished product sawing position.

[0048] 6. Repeat steps 3 to 5 to straighten and stretch other profiles.

[0049] Since the hollow profiles with large cross-sections are often designed with connecting ribs 14, the connecting ribs 14 are used to strengthen the surface of the hollow profiles on the one hand, and are used as the connecting parts of the profiles and other parts on the other hand. Using the above method, the connecting ribs 14 of the aluminum material are clamped and fixed by the special clamp 7, and the clamping position is closer to the center of the aluminum material, which can effectively straighten and stretch the hollow profile, and the deformation of the clamping part is small. After straightening using the device, the flatness requirements can be basically met after the head and tail waste are removed. The fixed chuck group 71 and the movable chuck group 72 of the special clamp 7 are respectively composed of a plurality of fixed chucks and movable chucks set at a predetermined distance from each other. The gap between the chucks matches the connecting ribs 14, which can match the connecting ribs 14 of different types of aluminum materials, and has a wide range of applications.

[0050] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A device for straightening and stretching complex hollow profiles, characterized in that: It includes a guide rail, a first hydraulic device, a main body component, a pressing mechanism, a rotating arm, a second hydraulic device, a special clamp and a third hydraulic device; The first hydraulic device is fixedly connected to the guide rail through a fixed support, the first hydraulic device is connected to the main component, a pulley is provided on the main component, and the main component can be driven by the first hydraulic device to move along the guide rail; The second hydraulic device is disposed on the upper portion of the main component and connected to the rotating arm; A receiving groove is provided in the middle of the main body component, and the pressing mechanism is arranged in the receiving groove and can swing up and down; The rotating arm is fixedly connected to the pressing mechanism, and the second hydraulic device can drive the rotating arm to swing up and down, thereby driving the pressing mechanism to swing up and down; A clamping pad matching with the pressing mechanism is provided below the pressing mechanism, and the special clamp is provided between the pressing mechanism and the clamping pad; The special clamp is connected to the third hydraulic device, and the third hydraulic device can drive the special clamp to move laterally; The special clamp comprises a fixed clamp group and a movable clamp group; The fixing chuck group includes a plurality of fixing chucks arranged at a predetermined distance from each other; The fixed clamp group and the movable clamp group can cooperate with each other to clamp and fix the connecting ribs in the cavity of the profile; The movable chuck group includes a plurality of movable chucks, and the movable chuck and the fixed chuck each include two clamping claws arranged opposite to each other at a predetermined distance; The fixed chuck group and the movable chuck group can cooperate with each other to clamp and fix the connecting ribs in the cavity of the profile, which means that the movable chuck group can translate up and down, and cooperate with the fixed chuck group to clamp and fix the connecting ribs located in the fixed chuck group and the movable chuck group; The special clamp also includes a connecting body, which includes a disc portion and connecting claws arranged on the upper and lower sides and the left and right sides of the disc portion; a hydraulic chamber and a piston are arranged in the connecting claw; the fixed clamp is arranged at the front end of the connecting claw, and the movable clamp is connected to the piston; The pressing mechanism is connected to the main component via a rotating shaft; the pressing mechanism is fixedly connected to the rotating shaft, and the rotating shaft can rotate relative to the main component; the rotating shaft passes through the main component, and its two ends are fixedly connected to the rotating arm.

2. The device for straightening and stretching complex hollow profiles according to claim 1, characterized in that: The pressing mechanism is composed of a plurality of metal blocks, which are arranged opposite to each other at a predetermined distance; and the lower part of the metal block has an elliptical arc surface.

3. The device for straightening and stretching complex hollow profiles according to claim 1, characterized in that: The first hydraulic device, the second hydraulic device and the third hydraulic device are hydraulic cylinders of different sizes.

4. The device for straightening and stretching complex hollow profiles as claimed in claim 2, characterized in that: The elliptical arc surface and / or the clamping pad are provided with anti-slip stripes.

5. A method for straightening and stretching a complex cavity profile, characterized in that: The aluminum material is shaped by using the complex hollow profile straightening and stretching device as described in any one of claims 1 to 4, comprising the following steps: (1) The profile is extruded by the extruder, passes through the online cooling system, is interrupted by the interruption saw, and then is pulled by the traction machine to the material bed of the extrusion rear equipment, and then horizontally transmitted to the straightening machine to be straightened and stretched; (2) When the hollow profile is straightened and stretched for the first time, the third hydraulic device is controlled separately on the control operation panel of the straightening machine to extend the telescopic rod, and the special clamp is installed on the end of the telescopic rod; (3) By precisely controlling the profile transmission displacement so that it is located in the middle of the front and rear straightening machines, the second hydraulic device is started to drive the pressing mechanism, and the pressing mechanism has two-step movement. In the first step, the elliptical arc surface of the metal block of the pressing mechanism is pressed down to the profile so that it can just fix the profile, and the third hydraulic device is started to push the special clamp into the profile cavity. In the second step, the movable chuck group of the special clamp is translated up and down, and the fixed chuck group is used to clamp the connecting ribs located in the fixed chuck group and the movable chuck group to clamp the profile; the pressing mechanism releases the profile; (4) According to the process setting stretching length, the first hydraulic device is started, and the main component is moved backward to stretch the profile longitudinally; (5) After the stretching is completed, the fixed chuck group and the movable chuck group of the special fixture are reset, the special fixture is separated from the inner cavity of the profile, and the profile is transferred from the material bed to the finished product sawing position; (6) Repeat steps 3 to 5 to straighten and stretch other profiles.

Images