High-precision metal profile bending forming extrusion die

Abstract

The invention relates to the technical field of profile forming, and discloses a high-precision metal profile bending forming extrusion die which comprises a base, a vertical frame and a telescopic air cylinder, a forming assembly is slidably connected to the vertical frame, an extrusion assembly is connected between the forming assembly and the telescopic air cylinder, and a matching assembly is arranged at the top of the vertical frame. The matching assembly and the forming assembly are located in the same vertical direction, when the telescopic end of the telescopic air cylinder moves towards one end of the vertical frame, the forming assembly moves upwards along the vertical line of the vertical frame, a formed metal profile piece is horizontally placed on the forming assembly, and the forming assembly and the matching assembly are matched. And the formed metal profile piece is bent, formed and extruded into a required shape. According to the method, the ship-shaped mold vertically applies pressure to be matched with the graphite cushion layer, cross section distortion caused by stress concentration is avoided, meanwhile, compensation pressure is applied to the outer side through the wrapping type extrusion system, the wall thickness thinning rate is reduced, the thinning area is shortened, and single plane bending of a traditional technology is upgraded to three-dimensional pressure cooperation.

Description

Technical Field

[0001] The present invention relates to the field of profile forming, and more specifically, it relates to an extrusion die for bending and forming high-precision metal profiles. Background Art

[0002] With the wide application of low-plasticity materials, the deformation in the transition zone caused by uncoordinated material flow during the bending of profiles is more significant. The existing die structures are difficult to accurately control the strain gradient distribution of materials in three-dimensional space. During the traditional bending and forming process of metal profiles, many discontinuity problems are prone to occur in the bending area, resulting in low dimensional accuracy and decreased mechanical properties.

[0003] Especially during the bending process, a radial pressure is applied to the outer side of the profile to compensate for the tensile thinning, causing the performance of the profile in the bending area to fail to meet the usage requirements. Summary of the Invention

[0004] The present invention provides an extrusion die for bending and forming high-precision metal profiles to solve the technical problems in the related art.

[0005] The present invention provides an extrusion die for bending and forming high-precision metal profiles, which includes a base, a vertical frame and a telescopic cylinder installed on the base. A forming assembly is slidably connected to the vertical frame. An extrusion assembly is connected between the forming assembly and the telescopic cylinder. A matching assembly is provided at the top of the vertical frame, and the matching assembly and the forming assembly are located in the same vertical direction.

[0006] The extrusion assembly includes a three-legged support plate, a bottom support rod, a top support rod and a swing support rod. The three ports of the three-legged support plate are all connected to the rod ends of the bottom support rod, the top support rod and the swing support rod through shafts.

[0007] The forming assembly includes a swing clamp, an angle adjustment cylinder, a bottom plate, a connecting rod, an adjustment seat and a matching die. The adjustment seat is installed on the outer walls on both sides of the bottom plate. The adjustment seat moves vertically upward. The swing clamp is connected to the adjustment seat through a shaft. The connecting rod is horizontally arranged in the swing clamp. The matching die is sleeved on the connecting rod. At the same time, the angle adjustment cylinder is movably connected to the bottom plate. A connecting seat is also sleeved on the connecting rod, and the telescopic end of the angle adjustment cylinder is connected to the connecting seat.

[0008] The matching assembly includes a chuck and a pipe bending head. The chuck is provided on the outer wall at the top of the pipe bending head. A pressing groove is opened at the bottom end of the pipe bending head, and the groove shape of the pressing groove fits the outer wall of the metal profile to be formed.

[0009] The matching die includes two identical die parts, and the anti-displacement cushion corners of the two die parts are arranged opposite to each other.

[0010] Among them, the matching die is of a boat-shaped structure. A notch is provided at the top end of the matching die. Anti-displacement cushion corners are provided at both ends of the notch. At the same time, a flexible force transmission layer is provided on the inner wall of the notch.

[0011] When the telescopic end of the telescopic cylinder moves towards one end of the vertical frame, the forming assembly moves upward along the plumb line of the vertical frame. The formed metal profile is horizontally placed on the forming assembly. The forming assembly cooperates with the matching assembly, and the formed metal profile is bent and extruded into the required shape.

[0012] Furthermore, the bottom end of the bottom support rod is connected to the base through a shaft, the top of the top support rod is shaft-connected to the outer wall of the bottom end of the bottom plate, and the end of the swing support rod is connected to the telescopic end of the telescopic cylinder through a shaft.

[0013] Furthermore, the vertical frame has a portal structure. Sliding tracks are provided on both inner walls of the vertical frame, and clamping assemblies are provided on the top of the vertical frame. The matching assembly is clamped within the clamping assembly.

[0014] Furthermore, sliding members are provided on the outer walls on both sides of the bottom plate, and the sliding members are clamped on the sliding tracks for movement.

[0015] Furthermore, the clamping assembly includes a lifting hanging frame and a clamp. The clamp is installed on the inner wall of the top of the lifting hanging frame.

[0016] Furthermore, clamping grooves are formed on both sides of the clamping head. At the same time, protrusions are provided at the clamping head end of the clamp, and the protrusions are clamped in the clamping grooves.

[0017] Furthermore, the graphite-impregnated copper-based composite material cushion layer serves as a flexible force transmission layer, and the distribution thickness of the graphite-impregnated copper-based composite material cushion layer in the notch is adjustable.

[0018] Furthermore, adjusting platforms are provided at the bottom ends of the telescopic cylinders. A stepping motor is provided on one side of the adjusting platform, and a stepping lead screw is provided at the driving end of the stepping motor. The stepping lead screw is connected to the adjusting platform.

[0019] Furthermore, the structure of the metal profile to be formed after forming includes at least one bending part.

[0020] Furthermore, two identical die parts are replaced by a first matching seat and a second matching seat. Both the first matching seat and the second matching seat are used to adapt to the bending part in the structure of the bent pipe part after the metal profile to be formed is formed.

[0021] The beneficial effects of the present invention are as follows:

[0022] In the present invention, the ship-shaped die vertically applies pressure in cooperation with the graphite cushion layer, so that the ovality ≤ 0.8%, avoiding cross-section distortion caused by stress concentration. At the same time, a compensated pressure is applied to the outside by using a wrapped extrusion system, reducing the wall thickness reduction rate to 7.2% and shortening the thinning area by 60%. Upgrading the single-plane bending of the traditional process to three-dimensional pressure coordination, achieving an angle accuracy of ±0.3° and an ovality of 0.7% in the S-shaped space bending, and providing a high-precision complex metal profile forming solution. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of an extrusion die for bending and forming high-precision metal profiles proposed by the present invention;

[0024] Figure 2 is of the present invention Figure 1 side view;

[0025] Figure 3 is of the present invention Figure 1 front view of the connection structure between the forming component and the matching component in

[0026] Figure 4 is of the present invention Figure 1 schematic structural diagram of the matching component in

[0027] Figure 5 is a schematic structural diagram of the metal profile to be formed in the first embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of the matching component and the matching die in the second embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of the metal profile to be formed in the second embodiment of the present invention;

[0030] Figure 8 is of the present invention Figure 7 practical application scenario diagram of the metal profile to be formed in

[0031] In the figure: 100, base; 200, vertical frame; 300, forming component; 310, matching die; 311, anti-displacement cushion angle; 312, graphite-impregnated copper-based composite material cushion layer; 313, first matching seat; 314, second matching seat; 320, swing clamp; 330, angle adjustment cylinder; 340, bottom plate; 350, connecting rod; 360, adjustment seat; 400, metal profile to be formed; 410, bending part; 500, matching component; 510, clamping groove; 600, clamping component; 610, lifting hanger; 620, fixture; 700, extrusion component; 710, three-legged support plate; 720, bottom support rod; 730, top support rod; 740, swing support rod; 800, telescopic cylinder; 810, adjustment table. Detailed Description of the Invention

[0032] Reference will now be made to example embodiments to discuss the subject matter described herein. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0033] Example 1

[0034] As Figures 1 - 5 shown, a high-precision metal profile bending and forming extrusion die includes an upright frame 200 and a telescopic cylinder 800 mounted on a base 100. A forming component 300 is slidably connected to the upright frame 200. An extrusion component 700 is connected between the forming component 300 and the telescopic cylinder 800. A matching component 500 is provided at the top of the upright frame 200. The matching component 500 and the forming component 300 are located in the same vertical direction. When the telescopic end of the telescopic cylinder 800 moves towards one end of the upright frame 200, the forming component 300 moves upward along the vertical line of the upright frame 200. The formed metal profile is horizontally placed on the forming component 300. The forming component 300 and the matching component 500 cooperate, and the formed metal profile is bent and formed into the required shape.

[0035] The upright frame 200 has a portal structure. Sliding tracks are provided on both inner walls of the upright frame 200. Clamping components 600 are provided at the top of the upright frame 200. The matching component 500 is clamped within the clamping components 600.

[0036] The forming component 300 includes a swing clamp 320, an angle adjustment cylinder 330, a bottom plate 340, a connecting rod 350, an adjustment seat 360, and a matching die 310. The adjustment seat 360 is installed on the outer walls on both sides of the bottom plate 340. The adjustment seat 360 can move vertically upward. The swing clamp 320 is connected to the adjustment seat 360 by a shaft. The connecting rod 350 is horizontally arranged within the swing clamp 320. The matching die 310 is sleeved on the connecting rod 350. At the same time, the angle adjustment cylinder 330 is movably connected to the bottom plate 340. A connecting seat is also sleeved on the connecting rod 350. The telescopic end of the angle adjustment cylinder 330 is connected to the connecting seat.

[0037] Sliding members are provided on the outer walls on both sides of the bottom plate 340. The sliding members are clamped in the sliding tracks for movement.

[0038] The matching component 500 includes a chuck and a pipe bending head. The chuck is provided on the outer wall at the top of the pipe bending head. Clamping grooves 510 are opened on both sides of the chuck. A pressing groove is opened at the bottom end of the pipe bending head. The groove shape of the pressing groove fits the outer wall of the to-be-formed metal profile 400.

[0039] The clamping assembly 600 includes a lifting hanger 610 and a fixture 620. The fixture 620 is installed on the inner wall of the top of the lifting hanger. A protrusion is provided at the chuck end of the fixture 620, and the protrusion is clamped in the clamping groove 510.

[0040] Among them, the mating die 310 is of a boat-shaped structure. A notch is provided at the top of the mating die 310. Anti-displacement cushion corners 311 are provided at both ends of the notch. At the same time, a graphite-impregnated copper-based composite material cushion layer 312 is provided on the inner wall of the notch. The graphite-impregnated copper-based composite material cushion layer 312 serves as a flexible force transmission layer, which can achieve uniform pressure distribution between the punch and the profile.

[0041] It should be noted that the mating die 310 is a set, consisting of two identical die parts, and the anti-displacement cushion corners 311 of the two die parts are arranged opposite to each other.

[0042] The extrusion assembly 700 includes a three-legged support plate 710, a bottom support rod 720, a top support rod 730, and a swing support rod 740. The three ports of the three-legged support plate 710 are all connected to the rod ends of the bottom support rod 720, the top support rod 730, and the swing support rod 740 through shafts. The bottom end of the bottom support rod 720 is connected to the base 100 through a shaft. The top of the top support rod 730 is axially connected to the outer wall of the bottom end of the bottom plate 340. The end of the swing support rod 740 is axially connected to the telescopic end of the telescopic cylinder 800.

[0043] Adjusting platforms 810 are provided at the bottom ends of the telescopic cylinders 800. A stepping motor is provided on one side of the adjusting platform 810. A stepping lead screw is provided at the driving end of the stepping motor, and the stepping lead screw is connected to the adjusting platform 810.

[0044] It should be noted that after the metal profile part 400 to be formed is formed, the structure of the bent pipe part is as Figure 5 shown. Its bending part 410 includes at least one, and at the same time, the bending part 410 is on the same plane and can be continuously bent and formed through the mating assembly 500.

[0045] Its working principle is as follows:

[0046] Clamping and positioning:

[0047] Place the metal profile part 400 to be formed (shown as a metal pipe fitting in the figure) horizontally in the notch of the mating die 310 and limit it through the anti-displacement cushion corners 311.

[0048] Lower the lifting hanger 610, and the protrusion of the fixture 620 is inserted into the clamping groove 510 of the bent pipe head to form three-point clamping (bent pipe head + two side chucks).

[0049] Initial bending:

[0050] The telescopic cylinder 800 contracts, driving the swing strut 740 to push the three - foot support plate 710. The top strut 730 vertically jacks up the bottom plate 340 along the sliding track by 10 - 15 mm, and contacts the front end of the boat - shaped structure of the mold 310 with the to - be - formed metal profile 400, and starts to apply radial pressure.

[0051] Dynamic forming:

[0052] The position of the telescopic cylinder 800 on the adjustment table 810 is adjusted by driving the lead screw through the stepper motor, which is mainly used to control the jacking speed (0.5 - 2 mm / s). The angle - adjustment cylinder 330 pushes the connecting seat, causing the swing clamp 320 to rotate around the axis by 5 - 30°, driving the to - be - formed metal profile 400 to bend. The pressure - resisting groove on the pipe - bending head is pressed down synchronously, forming a wrapped extrusion with the boat - shaped mold.

[0053] Pressure balance:

[0054] The graphite - impregnated copper - based cushion layer (friction coefficient < 0.1) evenly transmits pressure, and the anti - displacement pad angle 311 inhibits the axial movement of the to - be - formed metal profile 400 (displacement ≤ 0.05 mm).

[0055] Continuous bending:

[0056] After completing the single - point bending, the lifting hanger 610 lifts and resets. The to - be - formed metal profile 400 moves step - by - step, repeating the above process to form multiple bending parts 410, and all the bending parts 410 are kept in the same plane (angle error ±0.5°).

[0057] Embodiment 2

[0058] As Figures 6 - 8 shown, the structure of the bent pipe after the to - be - formed metal profile 400 is formed is as Figure 7 shown. In actual application to pipeline laying, as Figure 8 shown, the required matching components 500 and the matching mold 310 are as Figure 6 shown;

[0059] At this time, the matching mold 310 changes from the two identical mold parts in Embodiment 1 to the first matching seat 313 and the second matching seat 314. The first matching seat 313 and the second matching seat 314 are used to adapt to the bending parts 410 in the structure of the bent pipe after the to - be - formed metal profile 400 is formed;

[0060] The front - view structure of the structure of the bent pipe after the to - be - formed metal profile 400 is formed is "S - shaped", and the bending parts 410 of its bent pipe are not in the same plane;

[0061] At this time, the positions of the first matching seat 313 installed on the connecting rod 350 are not in the same vertical plane;

[0062] At the same time, the pressing groove at the bottom end of the elbow of the matching component 500 is also S-shaped;

[0063] Its working principle is as follows:

[0064] Double station matching system:

[0065] The single boat-shaped mold of the first embodiment is replaced by the first matching seat 313 (main bending mold) and the second matching seat 314 (auxiliary forming mold). The two molds have the following characteristics:

[0066] The first matching seat 313 is installed on the connecting rod 350 on one side, with a 15° deflection angle, responsible for the initial bending section forming;

[0067] The second matching seat 314 is installed on the connecting rod 350 on the other side, and the axis forms a spatial angle of 35-50° with the first matching seat 313 to control reverse bending;

[0068] The distance between the two is L=2.5D (D is the tube diameter), which can be adjusted axially by ±50mm along the connecting rod 350.

[0069] Three-dimensional pressure system:

[0070] The pressure groove of the elbow head is upgraded to an S-shaped surface, and the curvature radius R1 / R2 changes alternately (R1=1.2D, R2=1.8D), forming a spatial envelope with the double matching seat.

[0071] 2. Molding process upgrade

[0072] Spatial positioning:

[0073] The metal profile 400 to be formed passes through the staggered notches of the double matching seats (the notch deflection angle is adjustable), and the S-shaped pressing groove of the elbow head is driven by a servo motor to achieve ±25° rotation positioning.

[0074] Compound Bend:

[0075] The first stage: the telescopic cylinder 800 is lifted to make the first matching seat 313 complete positive bending (lifting amount 12mm, pressure 80MPa);

[0076] The second stage: the stepper motor drives the connecting rod 350 to move axially by 30 mm, and the second matching seat 314 contacts the metal profile 400 to be formed;

[0077] Reverse forming: The angle adjustment cylinder 330 outputs a reverse torque (-15° to -30°) to achieve S-shaped bending in conjunction with the rotation of the bending head.

[0078] Pressure field reconstruction:

[0079] The pressure ratio of the double mating seats remains 1:0.6 (120 MPa for the front seat and 72 MPa for the rear seat). Among them, the graphite-impregnated copper-based composite material cushion 312 is upgraded to a gradient thickness (2 mm at the front and 3 mm at the rear) to compensate for the deformation differences in different curvature segments.

[0080] The embodiments of the present invention have been described above, but the present invention is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of the present invention.

Claims

1. A high-precision metal profile bending extrusion die, characterized in that: The invention comprises a base (100), a stand (200) and a telescopic cylinder (800) mounted on the base (100); a forming assembly (300) is slidably connected to the stand (200); an extrusion assembly (700) is connected between the forming assembly (300) and the telescopic cylinder (800); a matching assembly (500) is provided on the top of the stand (200); the matching assembly (500) and the forming assembly (300) are located in the same vertical direction; The extrusion assembly (700) comprises a tripod support plate (710), a bottom support rod (720), a top support rod (730) and a swing support rod (740), and three ports of the tripod support plate (710) are connected to the rod ends of the bottom support rod (720), the top support rod (730) and the swing support rod (740) through shafts; The molding assembly (300) comprises a swing clamp (320), an angle adjustment cylinder (330), a base plate (340), a connecting rod (350), an adjustment seat (360) and a matching mold (310). The adjustment seat (360) is mounted on the outer walls of both sides of the base plate (340). The adjustment seat (360) moves upward along the vertical direction. The swing clamp (320) is connected to the adjustment seat (360) via a shaft. The connecting rod (350) is horizontally arranged in the swing clamp (320). The matching mold (310) is sleeved on the connecting rod (350). Meanwhile, the angle adjustment cylinder (330) is movably connected to the base plate (340). A connecting seat is also sleeved on the connecting rod (350). The telescopic end of the angle adjustment cylinder (330) is connected to the connecting seat. The matching component (500) comprises a chuck and a pipe bending head, the chuck is arranged on the top outer wall of the pipe bending head, and a pressing groove is formed at the bottom end of the pipe bending head, the groove shape of the pressing groove is in contact with the outer wall of the metal profile (400) to be formed; The matching mold (310) comprises two identical mold pieces, and the anti-displacement pad corners (311) of the two mold pieces are arranged opposite to each other; The matching mold (310) is a boat-shaped structure, a notch is provided at the top of the matching mold (310), anti-displacement pads (311) are provided at both ends of the notch, and a flexible force transmission layer is provided on the inner wall of the notch; When the telescopic end of the telescopic cylinder (800) moves toward one end of the stand (200), the forming assembly (300) moves upward along the plumb line of the stand (200), and the formed metal profile is horizontally placed on the forming assembly (300). The forming assembly (300) and the matching assembly (500) cooperate with each other, and the formed metal profile is bent, formed and extruded into a desired shape.

2. A high-precision metal profile bending extrusion die according to claim 1, characterized in that: The bottom end of the bottom support rod (720) is connected to the base (100) via a shaft, the top shaft of the top support rod (730) is connected to the bottom outer wall of the bottom plate (340), and the end of the swing support rod (740) is connected to the telescopic end of the telescopic cylinder (800) via a shaft.

3. A high-precision metal profile bending and extrusion die according to claim 2, characterized in that: The stand (200) is of a door-shaped structure. Sliding tracks are provided on the inner walls of both sides of the stand (200). A clamping assembly (600) is provided on the top of the stand (200). The matching assembly (500) is clamped in the clamping assembly (600).

4. A high-precision metal profile bending extrusion die according to claim 3, characterized in that: Sliding members are provided on the outer walls of both sides of the bottom plate (340), and the sliding members are clamped on the sliding rails for movement.

5. A high-precision metal profile bending extrusion die according to claim 4, characterized in that: The clamping assembly (600) comprises a lifting hanger (610) and a clamp (620), wherein the clamp (620) is mounted on the top inner wall of the upgrading hanger.

6. A high-precision metal profile bending extrusion die according to claim 5, characterized in that: Clamping grooves (510) are formed on both sides of the clamping head, and a protrusion is provided at the clamping head end of the clamp (620), and the protrusion is clamped in the clamping groove (510).

7. A high-precision metal profile bending and extrusion die according to claim 6, characterized in that: The graphite-impregnated copper-based composite material cushion layer (312) serves as a flexible force transmission layer, and the distribution thickness of the graphite-impregnated copper-based composite material cushion layer (312) in the notch is adjustable.

8. A high-precision metal profile bending and extrusion die according to claim 7, characterized in that: An adjustment platform (810) is provided on the bottom end of each telescopic cylinder (800), a stepping motor is provided on one side of the adjustment platform (810), a stepping screw is provided at the driving end of the stepping motor, and the stepping screw is connected to the adjustment platform (810).

9. A high-precision metal profile bending and extrusion die according to claim 8, characterized in that: The structure of the metal profile piece (400) after being formed comprises at least one bent portion (410).

10. A high-precision metal profile bending extrusion die according to claim 9, characterized in that Two identical mold pieces in the matching mold (310) are replaced by a first matching seat (313) and a second matching seat (314), and the first matching seat (313) and the second matching seat (314) are both used to adapt to the bending portion (410) in the structure of the bent pipe piece after the metal profile piece (400) to be formed is formed.

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