A high-precision double-arm bending machine

Abstract

The present invention provides a high-precision double-rotating arm bending machine, which is characterized by comprising a working platform, a feeding mechanism and a bending mechanism; the working platform comprises: a platform frame; a plurality of clamping devices for fixing the bending template and for clamping the profiles attached to the bending template; and a plurality of adjusting mechanisms for paving the profiles so that the profiles are in the same horizontal plane; a plurality of the clamping devices are adjustable and arranged on the platform surface of the platform frame according to the sudden change position of the curvature of the current profile, and the clamping devices are detachably connected to the platform surface; the clamping device is provided with a lifting and lowering pressure rod to realize the clamping of the profiles attached to the bending template; the bending mechanism is located on both sides of the platform frame; the bending mechanism comprises a profile clamp; the profile clamp comprises at least two sandwich cores, each of which is detachably connected to a tooth plate. The bending machine can realize the bending of profiles, has high bending forming precision, can improve forming efficiency, is simple and convenient to operate, and has good versatility.

Description

Technical Field

[0001] The present invention relates to the technical field of stretch-bending processing, and more specifically to a high-precision double-rotating-arm stretch-bending machine. Background Art

[0002] Some large-scale building profiles often need to be processed to a certain curvature to achieve the integrity and aesthetics of the building frame. The bending machine can be used to bend various metal profiles such as metal pipes and metal bars to give the metal profiles a certain curvature. The existing bending machines on the market are mainly divided into rotary bending machines and double-arm bending machines. The bending machine is easy to operate, making the processed profiles perfectly curved, improving processing accuracy and process consistency, and improving production efficiency.

[0003] The existing double-arm bending machine is generally provided with a bending template. The arms on both sides clamp the two ends of the profile and rotate, and make the profile close to the profile surface of the bending template to limit the bending curvature of the profile, thereby realizing the bending of the profile.

[0004] When the profile is bent in multiple sections, the ideal state is that the bending template and the bent profile can fit well. However, since the profile includes plastic deformation and elastic deformation in the bending process, the profile will show a certain rebound property after the bending is completed. When the profile changes with the bending angle, its fitting position also changes along the contour surface of the bending template. When the profile is bent in multiple sections, since the bending process of the profile is from the middle to both ends, the profile close to the middle position has been bent in place in the early stage, but due to the difference in bending curvature at the two ends, the profile has a lever effect, which destroys the original bending result relying on the middle section. At the same time, due to the unreasonable design of the working platform, a gap appears between the profile and the bending template, affecting the forming accuracy, and ultimately making the product unable to achieve the best forming effect, the product needs to be reshaped, and the production efficiency is low.

[0005] In addition, the existing bending machines have relatively simple functions. This is because the structural design of the working platform is simple, the fixture layout on the working platform is simple, and the clamp is suitable for a single profile. The bending of steel, aluminum and other profiles by the existing bending machines is limited to bending profiles of a certain radius, or to bending a certain specification and model, and the scope of application is small. However, in the actual application of bending profiles, there are many types of profiles that need to be used. In the actual operation process, the existing bending machines can no longer meet the bending requirements of most profiles at the same time. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide a high-precision double-arm bending machine that can achieve profile bending, has high bending forming accuracy, can improve forming efficiency, is simple and convenient to operate, and has good versatility.

[0007] In order to achieve the above object, the present invention is implemented by the following technical scheme: a high-precision double-arm bending machine, characterized in that it includes:

[0008] Work platform;

[0009] A feeding mechanism for feeding profiles;

[0010] and a bending mechanism for clamping and stretching the two ends of the profile, and bending the profile until it abuts against the outside of the bending template;

[0011] Wherein, the working platform comprises:

[0012] Platform frame;

[0013] A plurality of clamping devices for fixing the bending template and for clamping the profiles attached to the bending template;

[0014] and a plurality of adjustment mechanisms for raising the profiles so that the profiles are at the same level;

[0015] A plurality of the clamping devices are adjustable and arranged on the platform surface of the platform frame according to the sudden change position of the curvature of the current profile, and the clamping devices are detachably connected to the platform surface; the clamping device is provided with a lifting and lowering pressure rod to realize the clamping of the profile attached to the bending template;

[0016] A plurality of adjustment mechanisms are arranged on the platform surface of the platform frame according to the positions of the profiles that are not in the same horizontal plane; the adjustment mechanism is located below the pressure rod and is provided with a liftable end surface for placing the profile, so as to adjust the profile as a whole to the same horizontal plane by lifting and lowering the end surface;

[0017] The stretching and bending mechanism is located on both sides of the platform frame; the stretching and bending mechanism includes a profile clamp; the profile clamp includes at least two sandwich cores, each of which is detachably connected to a tooth plate to achieve matching of the tooth plate with the shape and size of the profile.

[0018] The working principle of the stretch bending machine of the present invention is:

[0019] First, the bending machine is adjusted according to the bending requirements of the profile, including the following steps: a plurality of clamping devices are arranged on the platform surface of the platform frame according to the sudden change position of the bending curvature of the current profile; the bending template is installed through the clamping device; the end face height of the adjustment mechanism is adjusted so that the profile is located on the same horizontal plane as a whole; the bending mechanism and the tooth plate of the profile clamp are arranged according to the shape and size of the profile;

[0020] Then, the profile is loaded and stretched and bent: the loading mechanism assists in loading the profile onto the platform surface, and is padded by the adjusting mechanism; the profile clamps of the stretching and bending mechanisms on both sides clamp both ends of the profile at the same time, and the clamped profile is simultaneously brought closer to the stretching and bending template through the stretching and bending swing arms of the stretching and bending mechanisms on both sides to fit it; in the fitting process, whenever the bending section of the profile fits with the arc surface of the stretching and bending template correspondingly installed with the clamping device, the pressure rod of the clamping device is pressed down to clamp the sudden change position of the curvature of the profile fitted to the stretching and bending template; when the profile fits the stretching and bending template as a whole and several clamping devices hold the profile, the stretching and bending machine completes the stretching and bending process of the profile.

[0021] In the above scheme, several clamping devices of the present invention can clamp the bent profile to prevent a gap from appearing between the profile and the bending template during the stretching process, thereby ensuring the accuracy of the profile bending and forming, and improving the forming efficiency. In addition, several clamping devices of the present invention can adjust the platform surface set on the platform frame according to the actual bending requirements of the profile, so that the working platform can be bent and processed into profiles with different arc radii as needed for clamping and fixing, meeting the bending requirements of profiles of different specifications; thereby improving the practicality and versatility of the working platform. The profile chuck divides the original sandwich into a detachable sandwich and a tooth plate, which can be disassembled and assembled; when the tooth plate is worn, only a new tooth plate needs to be replaced; when the bending machine needs to process profiles of different shapes and sizes, only the tooth plate needs to be replaced without replacing the sandwich part; it can save the use cost, repair and maintenance cost, and has good versatility. In addition, the working platform is provided with an adjustment mechanism to ensure that the profile is on the same horizontal plane, further improving the bending accuracy and bending quality. During the process of stretching and bending the profile, the working platform is easy to use and operate, which greatly reduces the production cost of the profile.

[0022] Preferably, the profile chuck also includes a core sleeve and a core driving device; the core sleeve is provided with a conical cavity, and each core is slidably arranged on the conical surface of the conical cavity; the core driving device is connected to a core connecting ring; each core is provided with a slot; the slot of each core is respectively clamped on the edge of the core connecting ring, so that the core driving device can simultaneously drive each core to move on the conical surface of the conical cavity, so that all the cores move inward or outward at the same time; the tooth plate is respectively located on the inner side of each core.

[0023] The working principle of the profile chuck is: the core driving device drives each core to move on the conical surface of the conical cavity at the same time, and the movement of the core on the conical surface of the conical cavity can be decomposed into a sub-movement along the axis direction of the conical cavity and a sub-movement perpendicular to the axis direction of the conical cavity, so that all the cores drive the tooth plates to move inward at the same time to clamp the profile, or all the cores drive the tooth plates to move outward at the same time to loosen the profile. The core and the tooth plates are set separately and can be disassembled and assembled; when the tooth plates are worn and need to be replaced or the profile is changed, only the tooth plates need to be replaced without replacing the core part, which can save the use cost, repair and maintenance cost, and has good versatility.

[0024] Preferably, the core is provided with a core mounting hole; a core connector is provided in the core mounting hole, and the core connector extends outside the core mounting hole to be connected to the tooth plate; a plate changing operation hole is provided on the conical surface of the conical cavity at a position corresponding to the core mounting hole.

[0025] When replacing the tooth plate, a disassembly and assembly tool is inserted into the plate changing operation hole and the core connector is loosened to release the fixation between the tooth plate and the core, and the tooth plate is removed; then a new tooth plate is put in, and a disassembly and assembly tool is inserted into the plate changing operation hole to lock the core connector to fix the new tooth plate and the core, and the tooth plate replacement is completed; the tooth plate replacement process does not require the profile chuck to be disassembled and assembled as a whole, the operation is simple and convenient, which can save time in replacing the tooth plate and is conducive to improving work efficiency.

[0026] Preferably, at least two long strip holes are opened on the conical surface of the conical cavity; a limiting column is slidably arranged in each of the long strip holes; each limiting column is connected to the sandwich core, so that the sandwich core can be slidably arranged on the conical surface of the conical cavity;

[0027] On each sandwich core, the connection between the limiting column and the sandwich core is located on both sides of the sandwich core mounting hole;

[0028] A key strip is arranged between the sandwich core and the tooth plate; the key strip is fixed to the sandwich core through a second sandwich core connector.

[0029] Preferably, the clamping device includes a support for installation on the platform surface, a fixed plate, a holding component for clamping the profile and a baffle for abutting against the bending template; the fixed plate and the support are adjustably connected, and the space between the fixed plate and the support serves as an installation space for the bending template, and the baffle and the support are adjustably connected and located in the installation space; the holding component is arranged on the fixed plate, and the pressure rod passes through the fixed plate and can be raised and lowered in the installation space, so as to achieve the clamping of the profile attached to the bending template.

[0030] The clamping device of the present invention can realize the installation of the bending template. After the bending template is installed in the installation space, it is supported against the bending template through the baffle, which not only strengthens the installation of the bending template, but also adjusts the front and rear position of the bending template. In addition, during the bending process of the profile that fits the bending template, the pressure rod of the clamping component can clamp the profile in the longitudinal direction to prevent the profile from having a gap with the bending template during the stretching process, thereby ensuring the accuracy of the bending forming of the profile and improving the forming efficiency. Moreover, the clamping component of the present invention can adjust the clamping height, so that the clamping device can be adapted to the clamping of profiles of different sizes, and has strong versatility and practicality.

[0031] Preferably, the support includes a bottom plate, a top plate and a support plate; the support plate is vertically connected to the bottom plate and the top plate respectively, and the bottom plate, the support plate and the top plate form an I-shaped structure; this design not only ensures that the stretch-bending formwork can be installed vertically, but also improves the structural strength of the support.

[0032] The platform surface of the platform frame is evenly distributed with a plurality of positioning holes that are detachably connected to the clamping device; the bottom plate is provided with fixing holes that are used to be screwed to the positioning holes on the platform surface. This design enables the clamping device to be adjustable on the platform surface.

[0033] Preferably, the adjustable connection between the fixing plate and the support means: it also includes a fixing plate adjusting member; the fixing plate is provided with an adjusting hole, and two screw holes 1 are provided at the end of the fixing plate; the fixing plate adjusting member includes a screw rod 1, a nut 1 and two lifting bolts, the screw rod 1 passes through the adjusting hole, the bottom end of the screw rod 1 is fixed to the top plate, the nut 1 is screwed on the screw rod 1 and is located on the upper surface of the fixing plate, and the two lifting bolts are screwed into the corresponding screw holes 1 on the fixing plate respectively; when working, the fixing plate and the support can be adjusted and the pressing surface of the pressing member can be adjusted by adjusting the nut 1 and the lifting bolts;

[0034] The baffle plate is adjustably connected to the support and is located in the installation space, which means: it also includes a baffle adjustment member; the space between the fixed plate and the base plate serves as the installation space for the bending template; the baffle adjustment member includes a connecting plate and a bolt; the connecting plate is vertically arranged between the base plate and the top plate, and the connecting plate is connected to the support plate; two screw holes are provided on the connecting plate, the bolt is screwed into the two screw holes, and the end face of the bolt is abutted against the baffle plate; during operation, the position of the baffle plate in the installation space is adjusted by the bolt, so that the baffle plate and the connecting plate can be adjusted.

[0035] The fixing plate of the present invention is adjustably connected to the support, and the height of the holding surface of the holding component can be adjusted, so that the clamping device can be suitable for the bending production of profiles of different sizes. In addition, the present invention can adjust the horizontal position of the bending template through the adjustable connection between the baffle plate and the support.

[0036] Preferably, the pressing component also includes a driving block, a handle, a connecting shaft and a connecting seat; the connecting seat is fixed to the fixing plate by a second nut, the pressure rod is passed through the connecting seat, one end of the pressure rod extends out of the installation space, and the other end is connected to the driving block by a connecting shaft; the handle is connected to the driving block; the pressing component also includes a limiting member for limiting the movement of the driving block; one end of the limiting member is hinged to the driving block, and the other end is hinged to the connecting seat. During the bending process, the operator can directly press the handle down to rotate the driving block 90° to achieve the pressure rod to press the profile, thereby achieving rapid pressure on the profile. Compared with the pressure holding method of the adjusting bolt, this method can achieve rapidity and stability, and the height of each pressure holding is consistent to ensure the bending quality of the profile.

[0037] Preferably, the adjustment mechanism comprises a lower base for being placed on the platform surface and an upper base for placing the profile; the butt joint surfaces of the lower base and the upper base are both wedge-shaped butt joint surfaces, and when working, the end surface height of the upper base is adjusted by pushing the upper base to move along the wedge-shaped butt joint surface of the lower base;

[0038] The adjustment mechanism also includes a screw rod 2 connected to the upper base; a screw hole 3 is provided at the end of the lower base, and the screw rod 2 is threadedly connected to the screw hole 3; when working, the upper base is pushed to move along the wedge-shaped docking surface of the lower base by rotating the screw rod 2.

[0039] When the surface of the working platform is uneven, an adjustment mechanism can be used to make the profiles placed on the end surface of the upper base on the same horizontal plane to ensure the quality of the bending. The present invention uses the rotation form to convert the linear motion form of the upper base, and the structure is simple.

[0040] Preferably, the loading mechanism includes a transport trolley for transporting profiles and a plurality of conveying devices for conveying profiles to the clamping station of the bending arm; the conveying device is detachably connected to the edge of the platform frame of the bending machine; the side of the conveying device away from the platform frame is opposite to the transport trolley. The profile is lifted up and supported on the transport trolley by the conveying device in a lifting manner, and the profile is conveyed to the clamping station of the bending arm in a horizontal movement manner through the action of external force, thereby realizing the loading of the profile. The loading method of the present invention is simple and ingenious, and the profile can be conveyed by the operator pushing, which can not only reduce the labor intensity of the operator, but also improve the feeding efficiency of the profile, thereby improving practicality.

[0041] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0042] 1. The bending machine of the present invention can realize the bending of profiles; a plurality of pressing devices can press the bent profiles to prevent a gap from appearing between the profiles and the bending templates during the stretching process, thereby ensuring the accuracy of the bending forming of the profiles and improving the forming efficiency;

[0043] 2. The bending machine of the present invention can meet the bending requirements of profiles of different specifications and has good versatility; it is simple and convenient to operate, can effectively improve production efficiency, and greatly reduce the production cost of profiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the stretch bending machine of the present invention;

[0045] Figure 2 It is a schematic diagram of the working platform structure of the stretch bending machine of the present invention, wherein the stretch bending template is not installed in the installation space;

[0046] Figure 3 The structure diagram of the clamping device of the bending machine of the present invention is shown in FIG. Figure 1 ;

[0047] Figure 4 The structure diagram of the clamping device of the bending machine of the present invention is shown in FIG. Figure 2 ;

[0048] Figure 5 It is a schematic diagram of the installation of the bending template and the clamping device support in the bending machine of the present invention;

[0049] Figure 6 The structure diagram of the adjustment mechanism of the bending machine of the present invention is shown in FIG. Figure 1 ;

[0050] Figure 7 The structure diagram of the adjustment mechanism of the bending machine of the present invention is shown in FIG. Figure 2 ;

[0051] Figure 8 It is a structural schematic diagram of a feeding mechanism of a stretch bending machine of the present invention;

[0052] Fig. 9 It is a structural schematic diagram of a conveying device in a feeding mechanism of a stretch bending machine of the present invention;

[0053] Fig.10 It is a side schematic diagram of a conveying device in a feeding mechanism of a stretch bending machine of the present invention;

[0054] Fig.11 It is a structural schematic diagram of a profile clamp of a stretch bending machine of the present invention;

[0055] Fig.12 is a cross-sectional view of a profile clamp of a stretch bending machine of the present invention;

[0056] Fig.13 It is an exploded view of the profile clamp of the stretch bending machine of the present invention;

[0057] Among them, 1 is a support, 1.1 is a bottom plate, 1.2 is a top plate, 1.3 is a support plate, 1.4 is a connecting plate, 1.5 is a fixing hole, 1.6 is a cushion block, 2 is a fixing plate, 2.1 is an adjustment hole, 3 is a holding component, 3.1 is a pressure rod, 3.2 is a driving block, 3.3 is a handle, 3.4 is a connecting shaft, 3.5 is a connecting seat, 3.6 is a nut, 3.7 is a limiting part, 4 is a baffle, 4.1 is a bolt, 5 5.1 is the screw, 5.2 is the nut, 5.3 is the lifting bolt, 6 is the lower base, 7 is the upper base, 8 is the screw, 9 is the bending template, 10 is the platform surface, 10.1 is the positioning hole, 11 is the profile, 12 is the platform frame, 13 is the clamping device, 14 is the adjustment mechanism, 15 is the bending swing arm, 16 is the installation space, 17 is the feeding mechanism, 17.1 is the installation frame, 17.2 is the top Lifting cylinder, 17.3 is the fastening bolt, 17.4 is the clamping part, 17.5 is the slider, 17.6 is the guide rail, 17.7 is the car body, 17.8 is the caster, 17.9 is the support frame, 17.10 is the receiving space, 18 is the profile clamp, 18.1 is the sandwich sleeve, 18.1.1 is the sandwich sleeve body, 18.1.2 is the connecting sleeve, 18.1.3 is the sandwich cylinder body, 18.1.4 is the long strip hole, 18.1.5 is the plate changing operation hole, 18.1.6 is the limiting column, 18.2 is the sandwich core, 18.2.1 is the sandwich core installation hole, 18.2.2 is the connection between the limiting column and the sandwich core, 18.2.3 is the slot, 18.3 is the tooth plate, 18.3.1 is the tooth plate body, 18.3.2 is the auxiliary tooth plate, 18.4 is the key bar, 18.5 is the sandwich core driving device, and 18.5.1 is the sandwich core connecting ring. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0059] Example

[0060] This embodiment is a high-precision double-arm bending machine, and its structure is as follows Figures 1 to 13 As shown, including:

[0061] Work platform;

[0062] A feeding mechanism 17 for feeding profiles;

[0063] And a bending mechanism for clamping and stretching the two ends of the profile, and bending the profile until it is supported on the outside of the bending template.

[0064] The working platform comprises a platform frame 12 .

[0065] The loading mechanism 17 includes a transport trolley for transporting the profile 11 and a plurality of conveying devices for conveying the profile 11 to the clamping station of the bending arm of the bending machine, wherein the conveying device is detachably connected to the edge of the platform frame 12, and the side of the conveying device away from the platform frame 12 is opposite to the transport trolley; when working, the conveying device lifts up the profile 11 mounted on the transport trolley in a lifting manner, and conveys the profile 11 to the clamping station of the bending arm in a horizontal movement manner through the action of external force, thereby realizing the loading of the profile 11.

[0066] The conveying device of the present invention comprises a mounting frame 17.1 detachably connected to the edge of the platform frame 12, a lifting cylinder 17.2 and a sliding mechanism, wherein the lifting cylinder 17.2 is connected to the mounting frame 17.1, and the driving end of the lifting cylinder 17.2 is connected to the sliding mechanism. The mounting frame 17.1 comprises a frame body and a fastening bolt 17.3; when working, the frame body clamps the edge of the platform frame 12, the fastening bolt 17.3 is penetrated in the frame body, and the end face of the fastening bolt 17.3 is against the bottom of the edge of the platform frame 12. The design can make the feeding mechanism applicable to platform frames 12 of various sizes and specifications by rotating the fastening bolt 17.3, and the position and number of the conveying device on the platform frame 12 can be arbitrarily designed according to the length and specification of the profile 11, thereby improving the practicality and versatility of the feeding mechanism. Specifically, the frame body is an "F"-shaped frame body, and the clamping portion 17.4 between the two transverse parts of the "F"-shaped frame body is used as the clamping portion 17.4 for clamping the edge of the platform frame 12.

[0067] The sliding mechanism of the present invention comprises a slider 17.5 and a guide rail 17.6 slidably connected to the slider 17.5, the slider 17.5 is connected to the lifting cylinder 17.2, and the end surface of the guide rail 17.6 serves as a receiving end surface for receiving the profile 11. The transport trolley of the present invention comprises a vehicle body 17.7 with casters 17.8 and support frames 17.9 arranged at both ends of the vehicle body 17.7, and the end surfaces of the support frames 17.9 serve as a mounting station for the profile 11. There is a recess between the support frames 17.9 at both ends of the vehicle body 17.7, and the recess serves as a receiving space 17.10 into which the guide rail extends. The casters 17.8 are provided with a foot brake component, and when the profile 11 is transported to one side of the conveying device, the foot brake component can be used to fix the position of the transport trolley.

[0068] The loading method of the present invention is: the profile 11 mounted on the transport trolley is lifted by the conveying device in a lifting manner, and the profile 11 is transported to the clamping station in a horizontal movement manner through the action of external force, so as to realize the loading of the profile 11. Specifically, the conveying device drives the guide rail 17.6 to rise through the lifting cylinder 17.2, receives the profile 11 mounted on the transport trolley, and pushes the guide rail 17.6 slidably connected to the slider 17.5 through the action of external force, so that the guide rail 17.6 transports the profile 11 to the clamping station in a horizontal movement manner, so as to realize the loading of the profile 11. When the guide rail 17.6 receives the profile 11 mounted on the transport trolley, the lifting cylinder 17.2 can be controlled to drive the guide rail 17.6 to rise slightly above the platform surface of the platform frame 12. At this time, the operator can push the guide rail 17.6 to move horizontally to transport the profile 11 to the clamping station of the bending swing arm, thereby quickly, labor-saving and effectively loading the profile 11.

[0069] The work platform also includes:

[0070] A plurality of pressing devices 13 for fixing the bending template 9 and pressing the profile 11 attached to the bending template 9;

[0071] and a plurality of adjustment mechanisms 14 for raising the profiles 11 so that the profiles 11 are at the same level;

[0072] A plurality of clamping devices 13 are adjustable and arranged on the platform surface 10 of the platform frame 12 according to the sudden curvature position of the current profile 11, and the clamping devices 13 are detachably connected to the platform surface 10. The clamping device 13 has a liftable pressure rod 3.1 to clamp the profile 11 attached to the bending template 9.

[0073] Several adjustment mechanisms 14 are arranged on the platform surface 10 of the platform frame 12 according to the positions of the profiles 11 which are not in the same horizontal plane. The adjustment mechanism 14 is located below the pressure rod 3.1 and is provided with a liftable end surface for placing the profile 11, so as to adjust the profile 11 as a whole to the same horizontal plane by lifting the end surface.

[0074] Each clamping device of the present invention includes a support 1 for installation on the platform surface 10 of the platform frame 12, a fixed plate 2, a holding component 3 for clamping the profile, and a baffle 4 for abutting against the bending template 9, wherein the fixed plate 2 is adjustably connected to the support 1, and the space between the fixed plate 2 and the support 1 serves as an installation space for the bending template, the baffle 4 is adjustably connected to the support 1 and is located in the installation space, the holding component 3 is arranged on the fixed plate 2, and the pressure rod 3.1 passes through the fixed plate 2 and can be raised and lowered in the installation space, so as to realize the clamping of the profile 11 attached to the bending template 9.

[0075] The support 1 of the present invention comprises a bottom plate 1.1, a top plate 1.2 and a support plate 1.3, wherein the support plate 1.3 is vertically connected to the bottom plate 1.1 and the top plate 1.2 respectively, and the bottom plate 1.1, the support plate 1.3 and the top plate 1.2 form an I-shaped structure.

[0076] The above-mentioned adjustable connection between the fixing plate 2 and the support 1 refers to: it also includes a fixing plate adjusting member 5, the fixing plate 2 is provided with an adjusting hole 2.1, and the end of the fixing plate 2 is provided with two screw holes 1. The fixing plate adjusting member 5 includes a screw rod 1 5.1, a nut 1 5.2 and two lifting bolts 5.3, the screw rod 1 5.1 passes through the adjusting hole 2.1, the bottom end of the screw rod 1 5.1 is fixed on the top plate 1.2, the nut 1 5.2 is screwed on the screw rod 1 5.1 and is located on the upper surface of the fixing plate 2, and the two lifting bolts 5.3 are respectively screwed in the corresponding screw holes 1 on the fixing plate 2; when working, by adjusting the nut 1 5.2 and the lifting bolts 5.3, the fixing plate 2 and the support 1 can be adjusted and the pressing surface of the pressing component can be adjusted.

[0077] The baffle plate 4 is adjustably connected to the support 1 and is located in the installation space, which means that: it also includes a baffle plate adjusting member 4.1, and the space between the fixed plate 2 and the bottom plate 1.1 is used as the installation space for the bending template 9, and the baffle plate adjusting member includes a connecting plate 1.4 and a bolt 4.1; the connecting plate 1.4 is vertically arranged between the bottom plate 1.1 and the top plate 1.2, and one end of the connecting plate 1.4 is connected to the support plate 1.3; the connecting plate 1.4 is provided with a second screw hole, and the bolt 4.1 is screwed into the second screw hole, and the end face of the bolt 4.1 is against the baffle plate 4; when working, the position of the baffle plate 4 in the installation space is adjusted by the bolt, so that the baffle plate 4 and the connecting plate 14 can be adjusted. The present invention can adjust the horizontal position of the bending template 9 by the adjustable connection between the baffle plate 4 and the support 1.

[0078] The platform surface 10 of the platform frame 12 of the present invention is evenly distributed with a plurality of positioning holes 10.1 that are detachably connected to the clamping device 13, and the bottom plate 1.1 is provided with fixing holes 1.5 that are used to be screwed to the positioning holes 10.1 on the platform surface 10. Pads 1.6 are fixed on both sides of the fixing holes 1.5 of the bottom plate 1.1, and in order to further improve the structural strength of the bracket 1, the baffle 4 is located on the pads 1.6.

[0079] The holding component 3 of the present invention also includes a driving block 3.2, a handle 3.3, a connecting shaft 3.4 and a connecting seat 3.5, wherein the connecting seat 3.5 is fixed to the fixing plate 2 by a nut 3.6, and a pressure rod 3.1 is arranged on the connecting seat 3.5, one end of which extends out of the installation space, and the other end is connected to the driving block 3.2 by a connecting shaft 3.4, and the handle 3.3 is connected to the driving block 3.2. The holding component also includes a limiting member 3.7 for limiting the movement of the driving block 3.2, one end of the limiting member 3.7 is hinged to the driving block 3.2, and the other end is hinged to the connecting seat 3.5. During the bending process, the operator can directly press the handle 3.3 to make the driving block 3.2 rotate 90°, so that the pressure rod 3.1 can be pressed on the profile, thereby realizing the rapid holding of the profile. Compared with the holding method of the adjusting bolt, this method can achieve rapidity and stability, and the height of each holding is consistent to ensure the bending quality of the profile.

[0080] The adjustment mechanism 14 of the present invention comprises a lower base 6 for placing on the platform surface 10 and an upper base 7 for placing the profile 11, wherein the butt joint surfaces of the lower base 6 and the upper base 7 are both wedge-shaped butt joint surfaces, and when working, the end surface height of the upper base 7 is adjusted by pushing the upper base 7 to move along the wedge-shaped butt joint surface of the lower base 6. When the surface of the platform surface 10 is uneven, the adjustment mechanism can be used to make the profile 11 placed on the end surface of the upper base 7 on the same horizontal plane to ensure the quality of the bending.

[0081] The adjustment mechanism 14 further includes a screw rod 2 8 connected to the upper base 7, and a screw hole 3 is provided at the end of the lower base 6, and the screw rod 2 8 is threadedly connected to the screw hole 3; when working, the upper base 7 is pushed to move along the wedge-shaped docking surface of the lower base 6 by rotating the screw rod 2 8. This method converts the rotation form into the linear motion form of the upper base 7, and the structure is simple.

[0082] In the above scheme, several clamping devices 13 of the present invention can clamp the bent profile 11 to prevent a gap from appearing between the profile 11 and the bending template 9 during the stretching process, thereby ensuring the accuracy of the profile bending and forming, and improving the forming efficiency. In addition, several clamping devices 13 of the present invention can adjust the platform surface 10 set on the platform frame 12 according to the actual bending requirements of the profile, so that the working platform can be bent and processed into profiles with different arc radii as needed, and clamp and fix them to meet the bending requirements of profiles of different specifications; thereby improving the practicality and versatility of the working platform. In addition, the working platform is provided with an adjustment mechanism to ensure that the profiles are on the same horizontal plane, further improving the bending accuracy and bending quality. During the process of bending the profile, the working platform is easy to use and operate, which greatly reduces the production cost of the profile.

[0083] The profile clamp comprises four sandwich cores 18.2, a sandwich core sleeve 18.1 and a sandwich core driving device 18.5. In this embodiment, there are four sandwich cores; in practical applications, the number of sandwich cores can also be two, three, five, six, or even more.

[0084] The core sleeve 18.1 comprises a core sleeve body 18.1.1, a core cylinder body 18.1.3 and a connecting sleeve 18.1.2; the core sleeve body 18.1.1 and the core cylinder body 18.1.3 are connected via the connecting sleeve 18.1.2. The core driving device 18.5 is arranged in the core cylinder body 18.1.3. The core sleeve body 18.1.1 is provided with a conical cavity.

[0085] A plurality of long strip holes 18.1.4 are provided on the conical surface of the conical cavity; a limiting column 18.1.6 is slidably provided in each of the long strip holes 18.1.4. Each limiting column 18.1.6 is connected to the sandwich core 18.2, so that the sandwich core 18.2 can be slidably arranged on the conical surface of the conical cavity. In this embodiment, the limiting column 18.1.6 is a bolt, and the bolt head is positioned on the outside of the sandwich sleeve body 18.1.1 through a nut. The bolt rod passes through the long strip hole 18.1.4 and is screwed to the sandwich core 18.2, so that the profile chuck can be easily assembled.

[0086] The core driving device 18.5 is connected to a core connecting ring 18.5.1; each core 18.2 is provided with a slot 18.2.3; the slots 18.2.3 of each core are respectively clamped on the edge of the core connecting ring 18.5.1, so that the core driving device 18.5 drives each core 18.2 to move on the conical surface of the conical cavity at the same time, so that all the cores 18.2 move inward or outward at the same time; the inner side of each core 18.2 is detachably connected to a tooth plate 18.3. Preferably, a clearance fit is adopted between the slots 18.2.3 of each core and the edge of the core connecting ring 18.5.1.

[0087] The working principle of the profile chuck is: the core driving device 18.5 drives each core 18.2 to move on the conical surface of the conical cavity at the same time, and the movement of the core 18.2 on the conical surface of the conical cavity can be decomposed into a sub-movement along the axis direction of the conical cavity and a sub-movement perpendicular to the axis direction of the conical cavity, so that all the cores 18.2 drive the tooth plate 18.3 to move inward at the same time (i.e., approach the axis of the conical cavity) to clamp the profile, or all the cores 18.2 drive the tooth plate 18.3 to move outward at the same time (i.e., move away from the axis of the conical cavity) to loosen the profile. The core 18.2 and the tooth plate 18.3 of the profile chuck are independently arranged and can be disassembled and assembled; when the tooth plate 18.3 is worn, only a new tooth plate 18.3 is required; when the bending machine needs to process profiles of different shapes and sizes, only the tooth plate 18.3 needs to be replaced without replacing the core 18.2; it can save the use cost, repair and maintenance cost, and has good versatility.

[0088] The core driving device 18.5 can adopt existing technology, such as a motor, and only needs to drive the core connecting ring 18.5.1 to move linearly.

[0089] The core 18.2 is provided with a core mounting hole 18.2.1; a core connector 1 is provided in the core mounting hole 18.2.1, and the core connector 1 extends outside the core mounting hole 18.2.1 and is connected to the tooth plate 18.3; a plate changing operation hole 18.1.5 is provided on the conical surface of the conical cavity at a position corresponding to the core mounting hole 18.2.1.

[0090] On each core 18.2, the connection 18.2.2 between the limiting column and the core is preferably located on both sides of the core mounting hole 18.2.1, so that the core 18.2 is subjected to balanced force, avoiding unbalanced force on the core 18.2 and affecting the clamping performance and service life of the profile clamp.

[0091] The sandwich mounting hole 18.2.1 is preferably a stepped through hole; the aperture of the stepped through hole is small at one end close to the tooth plate 18.3, and is large at the end away from the tooth plate 18.3; a screw hole is provided at a position corresponding to the stepped through hole on the tooth plate 18.3; accordingly, the sandwich connector 1 is a threaded connector; the head of the threaded connector is located in the stepped through hole, and the rod of the threaded connector extends from the stepped through hole and is screwed into the screw hole of the tooth plate 18.3.

[0092] When replacing the tooth plate 18.3, the core drive device 5 moves the core 18.2 and the tooth plate 18.3 away from the axis of the conical cavity, so that there is a disassembly space between the tooth plates 18.3. A disassembly tool, such as a screwdriver, is inserted from the plate-changing operation hole 18.1.5 to loosen the threaded connector to separate the tooth plate 18.3 from the core 18.2, and the tooth plate 18.3 is removed; then a new tooth plate 18.3 is inserted, and a disassembly tool is inserted from the plate-changing operation hole 18.1.5 to tighten the threaded connector to fix the new tooth plate 18.3 to the core 18.2, and the replacement of the tooth plate 18.3 is completed; the replacement process of the tooth plate 18.3 does not require the disassembly of the profile chuck as a whole, and the operation is simple and convenient, which can save time for replacing the tooth plate 18.3 and is conducive to improving work efficiency.

[0093] In this embodiment, the tooth plate 18.3 is arranged in the following two ways: one is that the tooth plate 18.3 includes a tooth plate body 18.3.1 connected to the sandwich 18.2, and an auxiliary tooth plate 18.3.2 connected to the tooth plate body 18.3.1; the other is that the tooth plate 18.3 is an integrally formed tooth plate 18.3. The former method uses a tooth plate with a more complex structure, which is convenient for the production of a tooth plate with a complex structure.

[0094] A key bar 18.4 is preferably provided between the core 18.2 and the tooth plate 18.3. The key bar 18.4 can strengthen the positioning and fixation between the tooth plate 18.3 and the core 18.2, thereby improving the clamping performance of the profile clamp. In practical applications, the key bar may not be provided between the core and the tooth plate.

[0095] Specifically, the core 18.2 is provided with a groove body 1, and the tooth plate 18.3 is provided with a groove body 2; the groove body 1 and the groove body 2 together form a receiving space for setting the key bar 18.4; the length direction of the key bar 18.4 preferably forms an angle with the axial direction of the conical cavity. The key bar 18.4 is fixed to the core 18.2 through the core connector 2. The key bar 18.4 is fixed to the core 18.2 and has no direct fixing relationship with the tooth plate 18.3. When the tooth plate 18.3 is replaced, it is not necessary to disassemble the key bar 18.4, so that the disassembly of the key bar 18.4 increases the replacement process of the tooth plate 18.3.

[0096] The working principle of the stretch bending machine of the present invention is:

[0097] First, adjust the bending machine according to the bending requirements of the profile, including the following steps:

[0098] The first step is to set a plurality of clamping devices 13 on the platform surface 10 of the platform frame 12 according to the sudden change position of the bending curvature of the current profile 11;

[0099] The second step is to install the bending template 9 by means of the clamping device 13: after the bending template 9 is installed in the installation space 16, the bending template 9 is installed by means of the baffle 4 being abutted against the bending template 9;

[0100] The third step is to use the adjustment mechanism 14 to adjust the profile 11 as a whole to the same horizontal plane by lifting the end surface: by rotating the screw rod 8, the upper base 7 is pushed to move along the wedge-shaped docking surface of the lower base 6, so as to adjust the end surface of the upper base 7 to lift and lower, so as to adjust the profile 11 as a whole to the same horizontal plane;

[0101] The fourth step is to set the bending swing arm of the bending mechanism and the tooth plate of the profile clamp 18 according to the shape and size of the profile.

[0102] After the bending machine is adjusted, the profile is loaded and bent: the loading mechanism 17 assists in loading the profile onto the platform surface, and is padded by the adjusting mechanism 14; the profile clamps 18 of the bending mechanisms on both sides clamp the two ends of the profile 11 at the same time, and the clamped profile 11 is simultaneously brought closer to the bending template 9 through the bending swing arms 15 of the bending mechanisms on both sides; during the bonding process, whenever the bending section of the profile 11 is in contact with the arc surface of the bending template 9 correspondingly installed by the clamping device 13, the pressure rod 3.1 of the clamping device 13 is pressed down to clamp the sudden change position of the curvature of the profile that is in contact with the bending template 9; when the profile 11 is in contact with the bending template 9 as a whole and several clamping devices 13 hold the profile 11, the bending process of the profile by the bending machine is completed.

[0103] Among them, controlling the pressing rod 3.1 of the pressing device 13 to press down to realize pressing the sudden curvature position of the profile 11 attached to the bending template 9 means: pressing the handle 3.3 downward to make the driving block 3.2 rotate 90° to push the pressing rod 3.1 downward, and realizing the self-locking of the pressing rod 3.1 after pressing down through the restriction of the restriction member 3.7, so as to realize pressing the sudden curvature position of the profile 11 attached to the bending template 9.

[0104] Between the first step and the second step, there is also a step of loading the profile to the clamping position of the bending arm 15: the profile 11 mounted on the transport trolley is lifted by the conveying device in a lifting manner, and the profile 11 is transported to the clamping position of the bending arm 15 in a horizontal movement manner through the action of external force, so as to realize the loading of the profile 11. Specifically, the conveying device drives the guide rail 17.6 to rise through the lifting cylinder 17.2, receives the profile 11 mounted on the transport trolley, and pushes the guide rail 17.6 slidably connected to the slider 17.5 through the action of external force, so that the guide rail 17.6 transports the profile 11 to the clamping position of the bending arm 15 in a horizontal movement manner, so as to realize the loading of the profile 11. When the guide rail 17.6 receives the profile 11 mounted on the transport trolley, the lifting cylinder 17.2 can be controlled to drive the guide rail 17.6 to rise slightly above the platform surface of the platform frame 12. At this time, the operator can push the guide rail 17.6 to move horizontally to transport the profile 11 to the clamping station of the bending swing arm, thereby quickly, labor-saving and effectively loading the profile 11.

[0105] The bending method of the present invention is easy to operate, and the pressing rod 3.1 of the pressing device 13 can be controlled to press down by manual operation or by sensor induction control. The bending method realizes the loading of the profile 11 by a fast, labor-saving and effective loading method, and the pressing device 13 presses the sudden change position of the curvature of the profile 11 in the longitudinal direction, and the adjustment mechanism 14 adjusts the horizontal plane of the profile 11 to be consistent, so as to effectively ensure the accuracy of the profile bending forming, improve the forming efficiency, and greatly improve the bending processing efficiency of the profile.

[0106] The bending method of the present invention is easy to operate, and the pressing rod 3.1 of the pressing device 13 can be controlled to press down by manual operation or by sensor induction control. The bending method realizes the loading of the profile 11 by a fast, labor-saving and effective loading method, and the pressing device 13 presses the sudden change position of the curvature of the profile 11 in the longitudinal direction, and the adjustment mechanism 14 adjusts the horizontal plane of the profile 11 to be consistent, so as to effectively ensure the accuracy of the profile bending forming, improve the forming efficiency, and greatly improve the bending processing efficiency of the profile.

[0107] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A high-precision double-arm stretch bending machine, characterized by: include: Work platform; A feeding mechanism for feeding profiles; and a bending mechanism for clamping and stretching the two ends of the profile, and bending the profile until it abuts against the outside of the bending template; Wherein, the working platform comprises: Platform frame; A plurality of clamping devices for fixing the bending template and for clamping the profiles attached to the bending template; and a plurality of adjustment mechanisms for raising the profiles so that the profiles are at the same level; A plurality of the clamping devices are adjustable and arranged on the platform surface of the platform frame according to the sudden change position of the curvature of the current profile, and the clamping devices are detachably connected to the platform surface; the clamping device is provided with a lifting and lowering pressure rod to realize the clamping of the profile attached to the bending template; A plurality of adjustment mechanisms are arranged on the platform surface of the platform frame according to the positions of the profiles that are not in the same horizontal plane; the adjustment mechanism is located below the pressure rod and is provided with a liftable end surface for placing the profile, so as to adjust the profile as a whole to the same horizontal plane by lifting and lowering the end surface; The bending mechanism is located on both sides of the platform frame; the bending mechanism includes a profile clamp; the profile clamp includes at least two sandwich cores, each sandwich core is detachably connected to a tooth plate, so that the tooth plate matches the shape and size of the profile; The profile chuck also includes a core sleeve and a core driving device; the core sleeve is provided with a conical cavity, and each core is slidably arranged on the conical surface of the conical cavity; the core driving device is connected to a core connecting ring; each core is provided with a clamping groove; the clamping groove of each core is clamped on the edge of the core connecting ring, so that the core driving device can simultaneously drive each core to move on the conical surface of the conical cavity, so that all the cores move inward or outward at the same time; the tooth plate is respectively located on the inner side of each core; The sandwich core is provided with a sandwich core installation hole; a sandwich core connector is provided in the sandwich core installation hole, and the sandwich core connector extends out of the sandwich core installation hole and is connected to the thread plate; a plate changing operation hole is provided on the conical surface of the conical cavity at a position corresponding to the sandwich core installation hole; At least two long strip holes are opened on the conical surface of the conical cavity; a limiting column is slidably arranged in each of the long strip holes; each limiting column is connected to the sandwich core, so that the sandwich core can be slidably arranged on the conical surface of the conical cavity; On each sandwich core, the connection between the limiting column and the sandwich core is located on both sides of the sandwich core mounting hole; A key bar is provided between the sandwich core and the thread plate; the key bar is fixed to the sandwich core through a sandwich core connector 2; the length direction of the key bar forms an angle with the axial direction of the conical cavity; The clamping device includes a support for installation on the platform surface, a fixed plate, a holding component for clamping the profile, and a baffle for abutting against the bending template; the fixed plate and the support are adjustably connected, and the space between the fixed plate and the support serves as an installation space for the bending template, and the baffle and the support are adjustably connected and located in the installation space; the holding component is arranged on the fixed plate, and the pressure rod passes through the fixed plate and can be raised and lowered in the installation space to achieve the clamping of the profile attached to the bending template.

2. The high-precision double-arm stretch bending machine according to claim 1 is characterized in that: The support comprises a bottom plate, a top plate and a support plate; the support plate is vertically connected to the bottom plate and the top plate respectively, and the bottom plate, the support plate and the top plate form an I-shaped structure; The platform surface of the platform frame is evenly distributed with a plurality of positioning holes detachably connected to the clamping device; the bottom plate is provided with fixing holes for being screwed with the positioning holes on the platform surface.

3. The high-precision double-arm stretch bending machine according to claim 2 is characterized in that: The adjustable connection between the fixing plate and the support means: it also includes a fixing plate adjusting member; the fixing plate is provided with an adjusting hole, and two screw holes 1 are provided at the end of the fixing plate; the fixing plate adjusting member includes a screw rod 1, a nut 1 and two lifting bolts, the screw rod 1 passes through the adjusting hole, the bottom end of the screw rod 1 is fixed to the top plate, the nut 1 is screwed on the screw rod 1 and is located on the upper surface of the fixing plate, and the two lifting bolts are screwed into the corresponding screw holes 1 on the fixing plate respectively; when working, the fixing plate and the support can be adjusted and the pressing surface of the pressing member can be adjusted by adjusting the nut 1 and the lifting bolts; The baffle plate is adjustably connected to the support and is located in the installation space, which means: it also includes a baffle adjustment member; the space between the fixed plate and the base plate serves as the installation space for the bending template; the baffle adjustment member includes a connecting plate and a bolt; the connecting plate is vertically arranged between the base plate and the top plate, and the connecting plate is connected to the support plate; two screw holes are provided on the connecting plate, the bolt is screwed into the two screw holes, and the end face of the bolt is abutted against the baffle plate; during operation, the position of the baffle plate in the installation space is adjusted by the bolt, so that the baffle plate and the connecting plate can be adjusted.

4. The high-precision double-arm stretch bending machine according to claim 1, characterized in that: The holding component also includes a driving block, a handle, a connecting shaft and a connecting seat; the connecting seat is fixed to the fixing plate by a second nut, and the pressure rod is passed through the connecting seat, one end of which extends out of the installation space, and the other end is connected to the driving block by a connecting shaft; the handle is connected to the driving block; the holding component also includes a limiting member for limiting the movement of the driving block; one end of the limiting member is hinged to the driving block, and the other end is hinged to the connecting seat.

5. The high-precision double-arm stretch bending machine according to any one of claims 1 to 4, characterized in that: The adjustment mechanism comprises a lower base for being placed on the platform surface and an upper base for placing the profile; the butt joint surfaces of the lower base and the upper base are both wedge-shaped butt joint surfaces, and when working, the end surface height of the upper base is adjusted by pushing the upper base to move along the wedge-shaped butt joint surface of the lower base; The adjustment mechanism also includes a screw rod 2 connected to the upper base; a screw hole 3 is provided at the end of the lower base, and the screw rod 2 is threadedly connected to the screw hole 3; when working, the upper base is pushed to move along the wedge-shaped docking surface of the lower base by rotating the screw rod 2.

6. The high-precision double-arm stretch bending machine according to any one of claims 1 to 4, characterized in that: The loading mechanism includes a transport trolley for transporting profiles and a plurality of conveying devices for conveying profiles to the clamping station of the drawing and bending swing arm; the conveying device is detachably connected to the edge of the platform frame of the drawing and bending machine; the side of the conveying device away from the platform frame is opposite to the transport trolley.

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