CN114789210B - Clamping and fixing method for thin-walled open profile bending process - Google Patents
Clamping and fixing method for thin-walled open profile bending process Download PDFInfo
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- CN114789210B CN114789210B CN202210478442.1A CN202210478442A CN114789210B CN 114789210 B CN114789210 B CN 114789210B CN 202210478442 A CN202210478442 A CN 202210478442A CN 114789210 B CN114789210 B CN 114789210B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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Abstract
薄壁开口型材拉弯工序装夹固定方法，基于薄壁开口型材拉弯工序工装总成，可对薄壁开口型材执行拉弯工序提供良好的装夹固定支持；薄壁开口型材拉弯工序工装总成，包括夹头装置、柔性衬包组件和侧壁夹持组件；装夹固定方法如下：S01，对薄壁开口型材进行充填及包口；S02，将夹头装置调节至初始状态；S03，装夹固定薄壁开口型材。本发明的优点在于，通过柔性衬包组件和侧壁夹持组件的配合，对薄壁开口型材的U形槽进行充填、开口及翻边进行包口、外侧壁面进行压实，实现了立体全方位的保护，有效避免了薄壁开口型材在拉弯过程中出现变形、起皱、断裂等问题。
The clamping and fixing method for the thin-walled open profile bending process is based on the thin-walled open profile bending process tooling assembly, which can provide good clamping and fixing support for the thin-walled open profile to perform the bending process; the thin-walled open profile bending process tooling assembly includes a clamping device, a flexible lining bag component and a side wall clamping component; the clamping and fixing method is as follows: S01, filling and wrapping the thin-walled open profile; S02, adjusting the clamping device to the initial state; S03, clamping and fixing the thin-walled open profile. The advantage of the present invention is that through the cooperation of the flexible lining bag component and the side wall clamping component, the U-shaped groove of the thin-walled open profile is filled, the opening and flanging are wrapped, and the outer wall surface is compacted, thereby achieving three-dimensional and all-round protection, and effectively avoiding the deformation, wrinkling, and fracture of the thin-walled open profile during the bending process.
Description
Technical Field
The invention relates to the technical field of tool clamps, in particular to a clamping and fixing method for a stretch bending process of a thin-wall open section.
Background
The front and rear collision cross beam of the automobile is a common open section, and is required to be integrally bent into a certain radian through stretch bending operation in the processing process, and the state of the front and rear collision cross beam after the stretch bending operation is shown in fig. 10. On the one hand, the front and back collision cross beam is usually made of aluminum alloy materials, has good plasticity to meet the deformation requirement in the stretch bending process, and on the other hand, in order to meet the requirement of automobile light weight, the front and back collision cross beam is relatively thin in thickness design, and strength is improved by arranging reinforcing ribs or boss structures.
Based on the two factors, the front-rear collision cross beam has the following problems that the clamping positions of clamps used in the bending working procedure are usually positioned at two ends of a section bar, the section bar clamps are easy to collapse due to the fact that the wall thickness of the section bar is thin, clamping force is too large, clamping heads slide and even loose easily occur in the bending process due to the fact that the clamping force is too small, 2, in the bending process, the section bar can generate a tendency of material extrusion accumulation in a region close to the inner side of an arc, the section bar can generate a tendency of material stretching and extension in a region close to the outer side of the arc, the section bar is deformed after bending, the edge wrinkling phenomenon seriously affects the forming quality, and the section distortion and the edge wrinkling phenomenon are serious along with the increase of the bending degree, so that the bending degree of the section bar is seriously limited, and 3, if hidden cracks and other material defects exist in the middle of the section bar, the material defects can generate stress concentration in the bending process, and hidden danger of the section bar is broken suddenly and outwards sprung open.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a clamping and fixing method for a stretch bending process of a thin-wall open section.
The technical scheme of the invention is that the clamping and fixing method for the stretch bending process of the thin-wall open-ended section bar is based on the fixture assembly of the stretch bending process of the thin-wall open-ended section bar, and can provide good clamping and fixing support for the stretch bending process of the thin-wall open-ended section bar;
the fixture assembly for the stretch bending process of the thin-wall open section comprises a chuck device, a flexible lining package assembly and a side wall clamping assembly;
the two groups of clamping head devices are respectively used for clamping two ends of the thin-wall opening section bar and comprise an outer shell, a spring bolt, a connecting seat, a pressing block A, a pressing block B, a power shaft and an end inner pad;
the shell is sleeve-shaped, the wall surface of an inner hole of the shell is conical, a section bar loading and unloading port and a power access port which are communicated with the inner hole of the shell are respectively arranged at two ends of the shell, four kidney-shaped holes which are communicated with the inner hole of the shell are annularly and uniformly distributed on the outer round surface of the shell, and the extending direction of the kidney-shaped holes is parallel to the axial direction of the shell;
The four connecting seats are uniformly distributed in the inner hole of the shell in a ring shape and are arranged in a pair-by-pair manner;
One end of the head part of the spring bolt is positioned outside the shell, and one end of the rod part of the spring bolt passes through a kidney-shaped hole on the shell, extends into an inner hole of the shell and is in threaded connection with the connecting seat;
The two pressing blocks A are detachably connected to the mounting surfaces of the two oppositely arranged connecting seats and are oppositely arranged, and the two pressing blocks B are detachably connected to the mounting surfaces of the other two oppositely arranged connecting seats and are oppositely arranged;
The power shaft is movably arranged on the power access port of the shell, the front end of the power shaft extends out of the shell to receive external power, the rear end of the power shaft extends into the inner cavity of the shell, and the rear end of the power shaft is provided with an inserting part B;
The end inner pad is movably arranged in the accommodating section, the two side vertical faces of the end inner pad are clamped between the two pressing blocks A, a gap is formed between the upper end face of the end inner pad and the pressing blocks B, the two slots are respectively communicated with the two sides of the gap at the upper end, and the two slots are respectively communicated with one gap at the lower end, so that the gap, the slots and the gaps are sequentially communicated to form a clamping section which is suitable for the shape of the thin-wall opening profile;
The flexible lining package assembly is arranged on the thin-wall opening section bar and positioned on the length section of the thin-wall opening section bar between the two clamping head devices, and comprises a middle flexible lining and a middle package opening outer lining;
The flexible middle lining is a strip-shaped member, is movably arranged in a U-shaped groove of the thin-wall opening profile and is matched with the shape of the U-shaped groove of the thin-wall opening profile, one side surface of the flexible middle lining, which is opposite to the bottom of the U-shaped groove, is defined as a surface A, one side surface of the flexible middle lining, which faces towards the opening of the U-shaped groove, is defined as a surface B, and the surfaces of the flexible middle lining, which are opposite to the two side walls of the U-shaped groove, are defined as surfaces C;
the middle wrapping opening outer liner is a strip-shaped member, an inner groove and an outer groove which extend along the length direction and are sequentially arranged from deep to shallow in groove depth are arranged on one side surface of the middle wrapping opening outer liner, the outer groove is arranged outside the inner groove and is used for containing the inner groove, the middle wrapping opening outer liner is movably inserted into the middle flexible liner through the inner groove, and the opening of a thin-wall opening profile and two flanging edges are contained in the middle flexible liner through the outer groove;
The side wall clamping assemblies comprise a locking pliers and cushion blocks respectively welded at two pliers mouths of the locking pliers, wherein the locking pliers are movably clamped on the outer side wall surfaces of the two opposite sides of the thin-wall opening section bar through the two cushion blocks;
The clamping and fixing method comprises the following steps:
s01, filling and wrapping the thin-wall opening profile:
1. After the middle flexible lining is installed in place in the U-shaped groove of the thin-wall opening profile, the middle flexible lining is positioned in the middle section of the U-shaped groove, the surface A of the middle flexible lining is opposite to and attached to the bottom of the U-shaped groove, and the two surfaces C of the middle flexible lining are opposite to and attached to the two side walls of the U-shaped groove respectively;
2. The outer lining of the middle wrapping opening is arranged at the opening of the U-shaped groove of the thin-wall opening section bar, the position of the outer lining is opposite to that of the middle flexible lining, on one hand, the outer lining is movably inserted into the middle flexible lining through the inner groove, on the other hand, the opening and the two flanging of the thin-wall opening section bar are contained in the outer groove, and on the other hand, the outer lining is attached to the two flanging of the thin-wall opening section bar through the step surface between the outer groove and the inner groove;
3. Two end lining blocks are respectively arranged at two ends of the thin-wall opening section bar, so that two ends of a U-shaped groove of the thin-wall opening section bar are filled, after the two end lining blocks are arranged in place, two side walls of the U-shaped groove of the thin-wall opening section bar respectively penetrate through two slots of the end lining block, and the U-shaped groove is filled by the end lining blocks through an area between the two slots;
when the step is finished, the whole length of the U-shaped groove of the thin-wall opening profile is filled by the middle flexible lining and the two end lining blocks;
S02, adjusting the chuck device to an initial state:
1. The front ends of power shafts of the two groups of chuck devices are respectively connected with a power output part of a stretch bender, and the power output part of the stretch bender is controlled to act, so that the two groups of chuck devices are arranged opposite to each other and are positioned at the farthest distance;
2. driving the power shaft to move along the axial direction of the shell, and driving the four connecting seats to synchronously move along the inner hole wall surface of the shell through the matching relation between the plug-in part B of the power shaft and the plug-in parts A of the four connecting seats, so that the accommodating interval is enlarged to the limit;
In the step, the power output part of the stretch bender is used for driving the power shaft to do horizontal linear movement on one hand and driving the chuck device to do horizontal arc track swing and/or horizontal linear movement and/or vertical linear movement on the other hand;
S03, clamping and fixing the thin-wall opening profile:
1. hanging the thin-wall opening section bar subjected to filling and wrapping to be horizontal, and enabling two ends of the section bar to respectively face to section bar loading and unloading openings of the two chuck devices;
2. controlling the power output part of the stretch bender to act so that the two groups of chuck devices move horizontally and linearly in opposite directions, and accordingly two ends of the thin-wall open section bar extend into the accommodating sections of the two chuck devices through section bar loading and unloading ports of the two chuck devices respectively;
3. Controlling a power output part of the stretch bender to act, driving a power shaft to move along the axial direction of the shell, and driving four connecting seats to synchronously move along the inner hole wall surface of the shell through the matching relation between the plug-in part B of the power shaft and the plug-in parts A of the four connecting seats, so as to reduce the accommodating interval until the end part of the thin-wall opening profile is clamped;
4. The method comprises the steps of mounting a plurality of groups of side wall clamping assemblies on a thin-wall opening section bar at intervals along the length direction of the thin-wall opening section bar, specifically, adjusting a locking pliers into a clamping state, so that cushion blocks connected to two pliers mouths of the locking pliers are pressed on opposite outer side wall surfaces of the thin-wall opening section bar;
when the step is completed, the thin-wall opening section bar is clamped by the two clamping head devices together, the two pressing blocks A respectively press the two side vertical faces of the inner backing block at the end part, the pressing block B at the upper end presses the outer wall surface of the closed end of the thin-wall opening section bar through the lower surface of the pressing block B, and the pressing block B at the lower end presses the two flanging edges of the thin-wall opening section bar and the lower end surface of the inner backing block at the end part through the upper surface of the pressing block B.
In the step S03, the distance between two adjacent side wall clamping assemblies is required to be the minimum value on the premise that the conditions that the two adjacent side wall clamping assemblies do not interfere in the stretch bending process of the thin-wall opening section bar are met.
The invention has the further technical scheme that two pressing blocks A are respectively provided with crisscross anti-slip lines on the surfaces which are oppositely arranged, and two pressing blocks B are respectively provided with crisscross anti-slip lines on the surfaces which are oppositely arranged.
The invention further adopts the technical scheme that the notch depth of the end inner pad is matched with the flanging thickness of the thin-wall opening section bar, and when the thin-wall opening section bar is clamped in the clamping interval, the lower end face of the end inner pad is flush with the two flanging of the thin-wall opening section bar.
The invention further adopts the technical scheme that the plug-in part A is a positioning hole arranged on the connecting seat, the plug-in part B is a cylindrical boss arranged at the rear end of the power shaft, and the shape of the cylindrical boss is adapted to the shape of the positioning hole, so that the movable plug-in of the plug-in part A and the plug-in part B is realized.
Compared with the prior art, the invention has the following advantages:
1. For thin-walled open-ended profiles clamping and fixing in the stretch bending process. On the one hand, the U-shaped groove of the thin-wall opening section bar is filled, opened and turned to pack the opening and the outer side wall surface is compacted through the matching of the flexible lining pack assembly and the side wall clamping assembly, so that the three-dimensional all-dimensional protection is realized, and the problems of deformation, wrinkling, fracture and the like of the thin-wall opening section bar in the stretch bending process are effectively avoided. On the other hand, the inner wall of the thin-wall opening section bar is effectively set off through the inner lining blocks at the end parts in the chuck device, so that the thin-wall opening section bar is effectively prevented from being collapsed or crumpled by the clamp under the action of the clamping force, the thin-wall opening section bar can withstand relatively larger clamping force, and the clamping firmness is ensured.
2. The clamping head device is simple in process of clamping or detaching the profile, and can realize synchronous movement of the four connecting seats only by driving the power shaft to do reciprocating linear motion along the axial direction of the shell, so that the clamping or loosening of the profile is realized.
3. The clamping head device can adapt to sectional materials with different cross-sectional shapes by replacing the pressing block A, the pressing block B and the end inner pad, so that the clamping head device has good universality (universality).
4. The end inner side block in the chuck device is designed through the slot and the notch, so that the sectional material and the end inner lining block are connected, and then form a square whole body with multiple wall surfaces without steps, so that the pressing and clamping of the pressing block A and the pressing block B are facilitated, and the structural design difficulty of the pressing block A and the pressing block B is reduced.
5. The interval is equipped with many supplementary deformation grooves A on the middle part flexible inside lining in the flexible lining package subassembly, and the interval is equipped with many supplementary deformation grooves B on the middle part package mouth outer lining in the flexible lining package subassembly, based on this design, when the section bar crooked, flexible lining package subassembly can be fine laminating section bar synchronous bending, and is better to the setting off effect of section bar, difficult emergence fracture and crooked excessive condition that is difficult to recover.
The invention is further described below with reference to the drawings and examples.
Drawings
FIG. 1 is a schematic structural view of a thin-wall open section stretch bending process tooling assembly;
FIG. 2 is an exploded view of the cartridge assembly;
FIG. 3 is an assembly view of the cartridge assembly;
FIG. 4 is a schematic view of the end inner pad in the collet assembly;
FIG. 5 is an exploded view of the thin wall open section bar assembled with the flexible bag liner assembly;
fig. 6 is an enlarged view of a portion a of fig. 5;
FIG. 7 is a schematic view of the structure of the thin-walled open profile assembled with a flexible bag-lining assembly;
FIG. 8 is a schematic structural view of a side wall clamping assembly;
FIG. 9 is a schematic view of the working state of the present invention;
Fig. 10 is a schematic structural view of a thin-walled open profile after stretch bending.
The housing of fig. 3 is shown cut away in the axial direction to show the assembly of the components within the housing.
The illustration comprises a thin-wall opening profile 1;U groove 11, a flanging 12, a shell 21, a profile loading opening 211, a power inlet 212, a connecting seat 22, a convex arc surface 221, a mounting surface 222, a plug-in part A223, a spring bolt 23, a pressing block A24, a pressing block B25, a power shaft 26, a plug-in part B261, an end inner pad 27, a gap 270, a slot 271, a notch 272, a middle flexible lining 31, an auxiliary deformation groove A311, a middle opening wrapping outer lining 32, an inner groove 321, an outer groove 322, an auxiliary deformation groove B323, a locking pliers 41 and a cushion block 42.
Detailed Description
Example 1:
as shown in fig. 1-9, the thin-wall open section stretch bending process tool assembly comprises a thin-wall open section 1, a chuck device, a flexible lining package assembly and a side wall clamping assembly.
The thin-wall open section bar 1 is provided with a U-shaped groove 11, one end of the U-shaped groove 11 is closed, the other end of the U-shaped groove is open, and two edges of the opening are turned outwards to form a turned edge 12.
The two groups of clamping head devices are respectively used for clamping the two ends of the thin-wall opening profile 1. The chuck device comprises an outer shell 21, a connecting seat 22, a spring bolt 23, a pressing block A24, a pressing block B25, a power shaft 26 and an end inner pad 27.
The shell 21 is sleeve-shaped, the wall surface of an inner hole of the shell is conical, a section bar loading and unloading port 211 and a power access port 212 which are communicated with the inner hole of the shell 21 are respectively arranged at two ends of the shell, four kidney-shaped holes 213 communicated with the inner hole of the shell are annularly and uniformly distributed on the outer round surface of the shell, and the extending direction of the kidney-shaped holes 213 is parallel to the axial direction of the shell 21.
One side of the connecting seat 22 is provided with a convex cambered surface 221 for being attached to the inner hole wall surface of the shell 21, and the other side of the connecting seat 22 is provided with a mounting surface 222 and a plug-in part A223. The four connecting seats 22 are uniformly distributed in the inner hole of the shell 21 in a ring shape and are arranged in a pair-by-pair manner.
The head end of the spring bolt 23 is located outside the housing 21, and the rod end of the spring bolt 23 passes through the kidney-shaped hole 213 on the housing 21, extends into the inner hole of the housing 21, and is in threaded connection with the connecting seat 22. The spring bolt 22 forces the convex arc surface 221 of the connecting seat 22 to be pressed on the inner hole wall surface of the shell 21 through elastic force. The number of the spring bolts 23 is four, and the four spring bolts 23 are respectively in threaded connection with the four connecting seats 22.
The two pressing blocks a24 are detachably connected to the mounting surfaces 232 of two of the oppositely arranged connecting seats 23 and are oppositely arranged. The two pressing blocks B25 are detachably connected to the mounting surfaces 232 of the other two oppositely arranged connecting seats 23 and are oppositely arranged. The two pressing blocks A24 and the two pressing blocks B25 are surrounded to form a containing section, and the containing section is directly communicated with the section material loading and unloading opening 211 of the shell 21.
The power shaft 26 is movably mounted on the power inlet 212 of the housing 21, and has a front end extending outside the housing 21 to receive external power, a rear end extending into the inner cavity of the housing 21, and a rear end provided with a plug-in portion B261. The power shaft 26 is movably inserted with the insertion parts A223 of the four connecting seats 22 through the insertion parts B261. The power shaft 26 is driven by external power to do reciprocating rectilinear motion along the axial direction of the housing 21, and then the four connecting seats 22 are driven by the plug structure of the plug part B261 and the plug part A223 to synchronously move along the inner hole wall surface of the housing 21 so as to enlarge or reduce the accommodating section.
The end inner pad 27 is provided with two opposite side vertical surfaces and an upper end surface and a lower end surface arranged between the two side vertical surfaces, the end inner pad 27 is also provided with two slots 271 penetrating the upper end surface and the lower end surface, and two sides of the lower end surface of the end inner pad 27 are respectively provided with a notch 272. The end inner pad 27 is movably mounted in the housing section with its two side faces clamped between the two press blocks a24 and with its upper end face forming a gap 270 with the press block B25. The two slots 271 are respectively connected to two sides of the gap 270 at the upper ends, and the two slots 271 are respectively connected with one notch 272 at the lower ends, so that the gap 270, the slots 271 and the notch 272 are sequentially connected to form a clamping section which is suitable for the shape of the thin-wall opening profile 1.
The flexible lining package assembly is mounted on the thin-walled open profile 1 and is located on the length of the thin-walled open profile 1 between the two jaw arrangements. The flexible bag assembly includes a central flexible liner 31 and a central bag port outer liner 32.
The middle flexible lining 31 is a strip-shaped member which is movably mounted in the U-shaped groove 11 of the thin-walled open profile 1 and is adapted to the shape of the U-shaped groove 11 of the thin-walled open profile 1. The surface of the side of the middle flexible liner 31 opposite to the bottom of the U-shaped groove 11 is defined as a surface A, the surface of the side of the middle flexible liner 31 facing the opening of the U-shaped groove 11 is defined as a surface B, and the surface of the middle flexible liner 31 opposite to the two side walls of the U-shaped groove 11 is defined as a surface C. A plurality of auxiliary deformation grooves a311 are formed in the middle flexible liner 31 at intervals in the longitudinal direction, and the auxiliary deformation grooves a311 extend from the surface B to the surface a and penetrate through the two surfaces C.
The middle mouth-covering outer liner 32 is a strip-shaped member, and is provided on one side surface thereof with an inner groove 321 and an outer groove 322 extending in the longitudinal direction and having groove depths sequentially arranged from deep to shallow, the outer groove 322 being provided outside the inner groove 321 and accommodating the inner groove 321 therein. The middle opening-wrapping outer liner 32 is movably inserted into the middle flexible liner 31 through the inner groove 321 on one hand, and the opening and the two flanges 12 of the thin-wall opening section bar 1 are contained through the outer groove 322 on the other hand. One side surface defining the middle wrapping opening outer liner 32 provided with the inner side groove 321 and the outer side groove 322 is a surface D, one side surface defining the middle wrapping opening outer liner 32 opposite to the surface D is a surface E, and two side vertical surfaces defining the middle wrapping opening outer liner 32 arranged between the surface D and the surface E and parallel to the length direction of the middle wrapping opening outer liner 32 are surfaces F. The intermediate wrapping outer liner 32 is provided with a plurality of auxiliary deformation grooves B323 at intervals in the longitudinal direction, and the auxiliary deformation grooves B323 extend from the surface D to the surface E and penetrate the two surfaces F.
The plurality of groups of side wall clamping assemblies are arranged on the thin-wall opening section bar 1 at intervals along the length direction of the thin-wall opening section bar 1 and are positioned on the length section of the thin-wall opening section bar 1 between the two clamping head devices. The side wall clamping assembly comprises a locking pliers 41 and cushion blocks 42 respectively welded at two pliers mouths of the locking pliers 41. The locking pliers 41 are movably clamped on the opposite outer side wall surfaces of the thin-wall opening section bar 1 through two cushion blocks 42.
Preferably, the plugging portion a223 is a positioning hole formed on the connection base 22, the plugging portion B261 is a cylindrical boss formed at the rear end of the power shaft 26, and the shape of the cylindrical boss is adapted to the shape of the positioning hole, so as to realize movable plugging of the plugging portion a223 and the plugging portion B261.
Preferably, the housing 21 has a two-stage split structure, and the profile loading and unloading port 211 and the power inlet 212 are respectively provided on the two-stage split of the housing 21. Based on this structure, the assembly and disassembly of the internal components of the housing 21 are facilitated.
Preferably, two pressing blocks A24 are respectively provided with crisscross anti-slip lines on the surfaces which are oppositely arranged.
Preferably, two pressing blocks B25 are respectively provided with crisscross anti-slip lines on the surfaces which are oppositely arranged.
Preferably, the depth of the notch 272 of the end inner pad 27 is adapted to the thickness of the flanges 12 of the thin-walled open section bar 1, and when the thin-walled open section bar 1 is clamped in the clamping interval, the lower end surface of the end inner pad 27 is flush with the two flanges 12 of the thin-walled open section bar 1.
The clamping and fixing method is used for clamping and fixing the thin-wall open section bar in the stretch bending process, and comprises the following steps:
s01, filling and wrapping the thin-wall opening profile:
1. After the middle flexible lining 31 is installed in the U-shaped groove 11 of the thin-wall opening profile 1 in place, the middle flexible lining 31 is positioned in the middle section of the U-shaped groove 11, the surface A of the middle flexible lining 31 is opposite to and attached to the bottom of the U-shaped groove 11, and the two surfaces C of the middle flexible lining 31 are opposite to and attached to the two side walls of the U-shaped groove 11 respectively;
2. The middle opening-wrapping outer liner 32 is arranged at the opening of the U-shaped groove 11 of the thin-wall opening section bar 1 and is opposite to the middle flexible liner 31 in position, on one hand, the middle opening-wrapping outer liner is movably inserted into the middle flexible liner 31 through the inner groove 321, on the other hand, the opening and the two turnups 12 of the thin-wall opening section bar 1 are contained through the outer groove 322, and on the other hand, the middle opening-wrapping outer liner is attached to the two turnups 12 of the thin-wall opening section bar 1 through the step surface between the outer groove 322 and the inner groove 321;
3. Two end inner pads 27 are respectively arranged at two ends of the thin-wall opening profile 1, so that two ends of the U-shaped groove 11 of the thin-wall opening profile 1 are filled, after the two end inner pads are arranged in place, two side walls of the U-shaped groove 11 of the thin-wall opening profile 1 respectively pass through two slots 271 of the end inner pads 27, and the U-shaped groove 11 is filled by the end inner pads 27 through an area between the two slots 271.
At the completion of this step, the entire length of the U-shaped groove 11 of the thin-walled open profile 1 is filled with the middle flexible lining 31 and the two end inner pads 27.
S02, adjusting the chuck device to an initial state:
1. The front ends of the power shafts 26 of the two groups of chuck devices are respectively connected with the power output part of the stretch bender, and the power output part of the stretch bender is controlled to act, so that the two groups of chuck devices are arranged opposite to each other and are positioned at the farthest distance;
2. The power shaft 26 is driven to move along the axial direction of the shell 21, and then the four connecting seats 22 are driven to synchronously move along the inner hole wall surface of the shell 21 through the matching relation between the plug-in part B261 of the power shaft 26 and the plug-in parts A223 of the four connecting seats 22, so that the accommodating interval is enlarged to the limit;
In this step, the power take-off of the stretch bender is used to drive the power shaft 26 to move horizontally and linearly, and to drive the chuck device to swing horizontally and/or move vertically and linearly.
S03, clamping and fixing the thin-wall opening profile:
1. Hanging the thin-wall opening profile 1 subjected to filling and wrapping to be horizontal, and enabling two ends of the thin-wall opening profile to respectively face to profile loading and unloading openings 211 of the two chuck devices;
2. controlling the power output part of the stretch bender to act so that the two groups of chuck devices move horizontally and linearly in opposite directions, and accordingly two ends of the thin-wall open section bar extend into the accommodating sections of the two chuck devices through section bar loading and unloading ports 211 of the two chuck devices respectively;
3. The power output part of the stretch bender is controlled to act, the power shaft is driven to move along the axial direction of the shell 21, and then the four connecting seats 22 are driven to synchronously move along the inner hole wall surface of the shell 21 through the matching relation between the plug-in connection part B261 of the power shaft 26 and the plug-in connection parts A223 of the four connecting seats 22, so that the accommodating interval is shortened until the end part of the thin-wall opening profile 1 is clamped;
4. The plurality of groups of side wall clamping assemblies are arranged on the thin-wall opening section bar 1 at intervals along the length direction of the thin-wall opening section bar 1, in particular, the locking pliers 41 are adjusted to be in a clamping state, so that the cushion blocks 42 connected to the two pliers mouths of the locking pliers 41 are pressed on the opposite outer side wall surfaces of the two sides of the thin-wall opening section bar 1.
In the step, the distance between two adjacent side wall clamping assemblies is required to be the minimum value on the premise that the condition that the two adjacent side wall clamping assemblies do not interfere in the stretch bending process of the thin-wall opening profile 1 is met.
When the step is completed, the thin-wall open section bar 1 is clamped by the two clamping head devices together, the two pressing blocks A respectively press the two side vertical faces of the inner lining block at the end part, the pressing block B25 at the upper end presses the outer wall surface of the closed end of the thin-wall open section bar through the lower surface of the pressing block B, and the pressing block B25 at the lower end presses the two flanging 12 of the thin-wall open section bar 1 and the lower end face of the inner lining block 27 at the end part through the upper surface of the pressing block B.
Claims (5)
1. The clamping and fixing method for the stretch bending process of the thin-wall open section bar is based on the fixture assembly of the stretch bending process of the thin-wall open section bar, and can provide good clamping and fixing support for the stretch bending process of the thin-wall open section bar;
The fixture assembly is characterized by comprising a chuck device, a flexible lining package assembly and a side wall clamping assembly;
the two groups of clamping head devices are respectively used for clamping two ends of the thin-wall opening section bar and comprise an outer shell, a spring bolt, a connecting seat, a pressing block A, a pressing block B, a power shaft and an end inner pad;
the shell is sleeve-shaped, the wall surface of an inner hole of the shell is conical, a section bar loading and unloading port and a power access port which are communicated with the inner hole of the shell are respectively arranged at two ends of the shell, four kidney-shaped holes which are communicated with the inner hole of the shell are annularly and uniformly distributed on the outer round surface of the shell, and the extending direction of the kidney-shaped holes is parallel to the axial direction of the shell;
The four connecting seats are uniformly distributed in the inner hole of the shell in a ring shape and are arranged in a pair-by-pair manner;
One end of the head part of the spring bolt is positioned outside the shell, and one end of the rod part of the spring bolt passes through a kidney-shaped hole on the shell, extends into an inner hole of the shell and is in threaded connection with the connecting seat;
The two pressing blocks A are detachably connected to the mounting surfaces of the two oppositely arranged connecting seats and are oppositely arranged, and the two pressing blocks B are detachably connected to the mounting surfaces of the other two oppositely arranged connecting seats and are oppositely arranged;
The power shaft is movably arranged on the power access port of the shell, the front end of the power shaft extends out of the shell to receive external power, the rear end of the power shaft extends into the inner cavity of the shell, and the rear end of the power shaft is provided with an inserting part B;
The end inner pad is movably arranged in the accommodating section, the two side vertical faces of the end inner pad are clamped between the two pressing blocks A, a gap is formed between the upper end face of the end inner pad and the pressing blocks B, the two slots are respectively communicated with the two sides of the gap at the upper end, and the two slots are respectively communicated with one gap at the lower end, so that the gap, the slots and the gaps are sequentially communicated to form a clamping section which is suitable for the shape of the thin-wall opening profile;
The flexible lining package assembly is arranged on the thin-wall opening section bar and positioned on the length section of the thin-wall opening section bar between the two clamping head devices, and comprises a middle flexible lining and a middle package opening outer lining;
The flexible middle lining is a strip-shaped member, is movably arranged in a U-shaped groove of the thin-wall opening profile and is matched with the shape of the U-shaped groove of the thin-wall opening profile, one side surface of the flexible middle lining, which is opposite to the bottom of the U-shaped groove, is defined as a surface A, one side surface of the flexible middle lining, which faces towards the opening of the U-shaped groove, is defined as a surface B, and the surfaces of the flexible middle lining, which are opposite to the two side walls of the U-shaped groove, are defined as surfaces C;
the middle wrapping opening outer liner is a strip-shaped member, an inner groove and an outer groove which extend along the length direction and are sequentially arranged from deep to shallow in groove depth are arranged on one side surface of the middle wrapping opening outer liner, the outer groove is arranged outside the inner groove and is used for containing the inner groove, the middle wrapping opening outer liner is movably inserted into the middle flexible liner through the inner groove, and the opening of a thin-wall opening profile and two flanging edges are contained in the middle flexible liner through the outer groove;
The side wall clamping assemblies comprise a locking pliers and cushion blocks respectively welded at two pliers mouths of the locking pliers, wherein the locking pliers are movably clamped on the outer side wall surfaces of the two opposite sides of the thin-wall opening section bar through the two cushion blocks;
The clamping and fixing method comprises the following steps:
s01, filling and wrapping the thin-wall opening profile:
1. After the middle flexible lining is installed in place in the U-shaped groove of the thin-wall opening profile, the middle flexible lining is positioned in the middle section of the U-shaped groove, the surface A of the middle flexible lining is opposite to and attached to the bottom of the U-shaped groove, and the two surfaces C of the middle flexible lining are opposite to and attached to the two side walls of the U-shaped groove respectively;
2. The outer lining of the middle wrapping opening is arranged at the opening of the U-shaped groove of the thin-wall opening section bar, the position of the outer lining is opposite to that of the middle flexible lining, on one hand, the outer lining is movably inserted into the middle flexible lining through the inner groove, on the other hand, the opening and the two flanging of the thin-wall opening section bar are contained in the outer groove, and on the other hand, the outer lining is attached to the two flanging of the thin-wall opening section bar through the step surface between the outer groove and the inner groove;
3. Two end lining blocks are respectively arranged at two ends of the thin-wall opening section bar, so that two ends of a U-shaped groove of the thin-wall opening section bar are filled, after the two end lining blocks are arranged in place, two side walls of the U-shaped groove of the thin-wall opening section bar respectively penetrate through two slots of the end lining block, and the U-shaped groove is filled by the end lining blocks through an area between the two slots;
when the step is finished, the whole length of the U-shaped groove of the thin-wall opening profile is filled by the middle flexible lining and the two end lining blocks;
S02, adjusting the chuck device to an initial state:
1. The front ends of power shafts of the two groups of chuck devices are respectively connected with a power output part of a stretch bender, and the power output part of the stretch bender is controlled to act, so that the two groups of chuck devices are arranged opposite to each other and are positioned at the farthest distance;
2. driving the power shaft to move along the axial direction of the shell, and driving the four connecting seats to synchronously move along the inner hole wall surface of the shell through the matching relation between the plug-in part B of the power shaft and the plug-in parts A of the four connecting seats, so that the accommodating interval is enlarged to the limit;
In the step, the power output part of the stretch bender is used for driving the power shaft to do horizontal linear movement on one hand and driving the chuck device to do horizontal arc track swing and/or horizontal linear movement and/or vertical linear movement on the other hand;
S03, clamping and fixing the thin-wall opening profile:
1. hanging the thin-wall opening section bar subjected to filling and wrapping to be horizontal, and enabling two ends of the section bar to respectively face to section bar loading and unloading openings of the two chuck devices;
2. controlling the power output part of the stretch bender to act so that the two groups of chuck devices move horizontally and linearly in opposite directions, and accordingly two ends of the thin-wall open section bar extend into the accommodating sections of the two chuck devices through section bar loading and unloading ports of the two chuck devices respectively;
3. Controlling a power output part of the stretch bender to act, driving a power shaft to move along the axial direction of the shell, and driving four connecting seats to synchronously move along the inner hole wall surface of the shell through the matching relation between the plug-in part B of the power shaft and the plug-in parts A of the four connecting seats, so as to reduce the accommodating interval until the end part of the thin-wall opening profile is clamped;
4. The method comprises the steps of mounting a plurality of groups of side wall clamping assemblies on a thin-wall opening section bar at intervals along the length direction of the thin-wall opening section bar, specifically, adjusting a locking pliers into a clamping state, so that cushion blocks connected to two pliers mouths of the locking pliers are pressed on opposite outer side wall surfaces of the thin-wall opening section bar;
when the step is completed, the thin-wall opening section bar is clamped by the two clamping head devices together, the two pressing blocks A respectively press the two side vertical faces of the inner backing block at the end part, the pressing block B at the upper end presses the outer wall surface of the closed end of the thin-wall opening section bar through the lower surface of the pressing block B, and the pressing block B at the lower end presses the two flanging edges of the thin-wall opening section bar and the lower end surface of the inner backing block at the end part through the upper surface of the pressing block B.
2. The method for clamping and fixing a thin-wall open section bar in a stretch bending process according to claim 1, wherein in the step S03, the distance between two adjacent side wall clamping assemblies is required to be the minimum value on the premise that the condition that the two adjacent side wall clamping assemblies do not interfere in the stretch bending process of the thin-wall open section bar is met.
3. The clamping and fixing method for the stretch bending process of the thin-wall open section bar according to claim 2, wherein the two pressing blocks A are respectively provided with crisscrossed anti-slip lines on the surfaces which are oppositely arranged, and the two pressing blocks B are respectively provided with crisscrossed anti-slip lines on the surfaces which are oppositely arranged.
4. The method for clamping and fixing the thin-wall open section bar in the stretch bending process according to claim 3, wherein the notch depth of the inner lining block of the end part is matched with the flanging thickness of the thin-wall open section bar, and when the thin-wall open section bar is clamped in the clamping interval, the lower end face of the inner lining block of the end part is flush with the two flanging edges of the thin-wall open section bar.
5. The method for clamping and fixing the thin-wall open section bar in the stretch bending process according to claim 3 or 4, wherein the inserting part A is a positioning hole arranged on the connecting seat, the inserting part B is a cylindrical boss arranged at the rear end of the power shaft, and the shape of the cylindrical boss is matched with the shape of the positioning hole, so that the movable insertion of the inserting part A and the inserting part B is realized.
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| CN115815379A (en) * | 2022-09-28 | 2023-03-21 | 西安西部新锆科技股份有限公司 | Stretch bending die and stretch bending method for profile with Y-shaped section |
| CN117340079A (en) * | 2023-10-24 | 2024-01-05 | 珠海中联幕墙装饰工程有限公司 | Shaping mold for small radius aluminum profile and its bending method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213591478U (en) * | 2020-09-07 | 2021-07-02 | 优靓重工(武汉)有限公司 | Novel profile bending machine |
| CN113070405A (en) * | 2021-05-08 | 2021-07-06 | 南华大学 | Section stretch bending die with replaceable template piece and assembling method thereof |
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| CH461756A (en) * | 1965-05-03 | 1968-08-31 | Emil Dr Tobler | Process for the production of windows, window produced by this process and device for carrying out the process |
| CN108856526B (en) * | 2018-09-04 | 2024-01-23 | 沈阳飞机工业（集团）有限公司 | Positioning adjustable clamp of profile stretch bending die |
| CN111266444B (en) * | 2020-03-11 | 2025-01-24 | 广东高谱弯曲技术有限公司 | A high-precision double-arm bending machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213591478U (en) * | 2020-09-07 | 2021-07-02 | 优靓重工(武汉)有限公司 | Novel profile bending machine |
| CN113070405A (en) * | 2021-05-08 | 2021-07-06 | 南华大学 | Section stretch bending die with replaceable template piece and assembling method thereof |
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