CN114951364A - Rectangular pipe integral forming die and hydraulic forming machine and forming method thereof - Google Patents
Rectangular pipe integral forming die and hydraulic forming machine and forming method thereof Download PDFInfo
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- CN114951364A CN114951364A CN202210277510.8A CN202210277510A CN114951364A CN 114951364 A CN114951364 A CN 114951364A CN 202210277510 A CN202210277510 A CN 202210277510A CN 114951364 A CN114951364 A CN 114951364A
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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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
Abstract
The invention relates to a rectangular pipe integral forming die, a hydraulic forming machine and a forming method thereof, belonging to machining equipment. The invention provides an integrated forming die for a rectangular pipe, a hydraulic forming machine and a forming method thereof, and solves the problems of low efficiency and incapability of one-step forming caused by repeated bending in the manufacturing of the rectangular pipe. In order to achieve the purpose, the invention adopts the technical scheme that: the invention discloses an integral forming die for a rectangular pipe, which comprises a lower forming die, an upper forming die and a hydraulic machine; the middle part of the lower part forming die is provided with a rectangular groove, two sides of the rectangular groove are provided with protruding edge folding positioning blocks, and the width of the rectangular groove is the section thickness or height of the square tube; the upper forming die comprises a one-step forming male die and a secondary forming male die, a secondary male die groove is formed in the middle of the one-step forming male die, the secondary forming male die is arranged in the secondary male die groove, the width of the secondary forming male die is matched with that of the rectangular groove, and the width of the two flanging positioning blocks is matched with that of the one-step forming male die.
Description
Technical Field
The invention relates to a rectangular pipe integral forming die, a hydraulic forming machine and a forming method thereof, belonging to machining equipment.
Background
The current rectangular tube structure is formed by bending or welding, the manufacturing effect of the welding is high, and the production can be rapidly carried out on a production line. However, welded rectangular tube structures are only suitable for carrying longitudinal forces, which can lead to deformation of the side surfaces due to uneven stress caused by the welding.
The rectangular pipe formed in such a way can bear larger torsion and has good lateral surface stress condition because the rectangular pipe is formed by bending the whole metal plate.
The existing rectangular pipe is formed by bending a single pipe respectively, and a square pipe needs to be bent for multiple times. Or die-casting and molding in a molding die by two processes.
In any mode, the bending needs to be performed in a grading mode, the direction and the station need to be changed for processing, the processing efficiency is low, and the method is not suitable for large-scale factory production.
Disclosure of Invention
Aiming at the problems, the invention provides an integral forming die for a rectangular pipe, a hydraulic forming machine and a forming method thereof, which solve the problems of low efficiency and incapability of one-step forming caused by repeated bending in the manufacturing of the rectangular pipe.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention relates to an integral forming die for a rectangular pipe,
comprises a lower forming die, an upper forming die and a hydraulic press;
the middle part of the lower part forming die is provided with a rectangular groove, two sides of the rectangular groove are provided with protruding edge folding positioning blocks, and the width of the rectangular groove is the section thickness or height of the square tube;
the upper forming die comprises a primary forming male die and a secondary forming male die, a secondary male die groove is formed in the middle of the primary forming male die, the secondary forming male die is arranged in the secondary male die groove, the width of the secondary forming male die is matched with that of the rectangular groove, and the width of the two flanging positioning blocks is matched with that of the primary forming male die.
As a matter of preference,
the lower part forming die is characterized in that the inner edge and the outer edge of the rectangular groove of the lower part forming die are arc-shaped round corners, the inner corner edge of the folding positioning block is arc-shaped round corners, and the side edges of the one-step forming male die and the secondary forming male die are round corners.
Further preferred, the post forming terrace die is square post of cross-section one-tenth square, and square post size is the same with the square pipe internal diameter size of waiting to process, and square post one end is articulated to be connected and post forming pushes down support one end, and the post forming pushes down the support other end and is equipped with the connecting piece of connecting square post, and this connecting piece is for dismantling square post of separation and post forming push down support.
Further preferred, lower part forming die includes bottom template, middle part post forming die and two once components of a whole that can function independently moulds, and each part is detachable construction, middle part post forming die is fixed in the side middle part position of going up of bottom template, and the centre of post forming die sets up the rectangular channel, two once components of a whole that can function independently moulds are established in the both sides of post forming die, and once components of a whole that can function independently mould bottom is fixed on the bottom template, and once components of a whole that can function independently mould is close to the post forming die and is the plane for the top face, and the marginal position is outstanding hem locating piece.
Further preferably, the outer side of the top of the flanging positioning block is provided with a limiting bulge, a metal plate to be machined and formed is prevented from being arranged on the flanging positioning block, and two sides of the metal plate are limited by the flanging positioning block.
Preferably, the primary forming male die is of a split structure and is respectively arranged on two sides of the secondary forming male die, the rear parts of the primary forming male die and the secondary forming male die are respectively provided with a guide mechanism and a hydraulic driving mechanism, and the hydraulic driving mechanism on the rear part of the split primary forming male die synchronously drives the primary forming male die to move.
Preferably, the connecting piece comprises a locking hole arranged on the end face of the square column, a fixing hole on the secondary forming pressing support and a rotating lock pin, the rotating lock pin comprises a fixing shaft and a rotating pin, the fixing shaft is arranged in the fixing hole, the rotating pin is arranged in the locking hole, and the rotating pin is manually or mechanically driven to pull out or insert the rotating pin from the locking hole.
The invention discloses a hydraulic press for forming a rectangular pipe, which is provided with a rectangular pipe integral forming die in claim 6 or 7 and is characterized in that the high-speed hydraulic press comprises a bottom seat, a top frame and a supporting column, wherein the lower forming die is arranged on the bottom seat of the hydraulic press, the upper forming die is arranged below the top frame of the hydraulic press, a primary forming pressing oil cylinder and a secondary forming pressing oil cylinder are arranged in the top frame of the hydraulic press, the lower end of a piston rod of the primary forming pressing oil cylinder is connected with a primary forming convex die, and the secondary forming pressing oil cylinder is connected with a secondary forming convex die.
The invention relates to a rectangular tube forming method of a rectangular tube forming hydraulic press, which comprises the following steps,
1) horizontally placing a metal plate between the limiting bulges at two sides of the lower forming die;
2) the primary forming male die and the secondary forming male die of the upper forming die are driven by the primary forming pressing oil cylinder and the secondary forming pressing oil cylinder to press downwards, the metal plate is pressed between the flanging positioning blocks of the lower forming die, and the edges of two sides of the metal plate are bent;
3) the one-step forming male die is driven by the one-step forming pressing oil cylinder to be lifted upwards to a high position;
4) the secondary forming male die is driven by a secondary forming pressing oil cylinder to continue pressing, the metal plate is pressed into a rectangular groove of the secondary forming female die, and the middle part of the metal plate is bent to form a rectangular pipe with an opening seam at the upper part;
5) the square column and the secondary forming pressing support are detached from the connecting piece at one end of the square column of the primary forming male die, the rectangular pipe is moved, the square column is separated from the rectangular pipe, and the forming of the rectangular pipe is completed.
The invention has the advantages that:
the rectangular tube is processed and formed at one time on one station, so that the processing and manufacturing efficiency of the rectangular tube is improved;
by designing new die forming equipment, a set of die is used for bending the metal plate into a rectangular square tube, the manufacturing time of single equipment is shortened, and the manufacturing efficiency is improved;
the molding manufacturing at the same position avoids the waste of time caused by multiple clamping due to the subsection manufacturing;
the combination of the forming equipment is realized through a hydraulic press, and the floor area of the equipment is reduced.
Drawings
FIG. 1 is a block diagram of a rectangular tube forming hydraulic press of the present invention.
FIG. 2 is a drawing of a rectangular pipe forming die and a drawing of a metal plate before the start of processing according to the present invention.
Fig. 3 is a structural view of the rectangular pipe forming die of the present invention after one-step forming.
Fig. 4 is a structural view after the rectangular tube forming die of the present invention is post-formed.
FIG. 5 is a structural diagram of the rectangular tube forming hydraulic press and the rectangular tube integral forming die of the present invention.
Reference numerals: 1. the device comprises a primary forming male die, a secondary male die groove, a rectangular groove, a flanging positioning block, a metal plate, a rectangular square tube, a secondary forming pressing support, a connecting piece, a bottom template, a secondary forming female die, a primary split die, a limiting bulge, a bottom seat, a top frame, a supporting column, a primary forming pressing oil cylinder and a secondary forming pressing oil cylinder, wherein the primary forming male die is 2, the secondary forming male die is 3, the secondary male die groove is 4, the rectangular groove is 5, the flanging positioning block is 6, the metal plate is 7, the rectangular square tube is 8, the secondary forming pressing support is 9, the connecting piece is 10, the bottom template is 11, the secondary forming female die, 12, the primary split die is 13, the limiting bulge is 14, the bottom seat is 15, the top frame is 16, the supporting column is 17, the primary forming pressing oil cylinder is 18, and the secondary forming pressing oil cylinder is adopted.
Detailed Description
The invention comprises a rectangular pipe integral forming die and a forming method of a rectangular pipe of a hydraulic press.
The structure of the mold for integrally forming the rectangular tube is shown in figure 2,
comprises a lower forming die and an upper forming die;
a rectangular groove 4 is formed in the middle of the lower forming die, protruding edge folding positioning blocks 5 are arranged on two sides of the rectangular groove 4, and the width of the rectangular groove 4 is equal to the section thickness or height of a square tube;
the upper part forming die comprises a one-time forming male die 1 and a two-time forming male die 2, a two-time male die groove 3 is formed in the middle of the one-time forming male die 1, the two-time forming male die 2 is arranged in the two-time male die groove 3, the width of the two-time forming male die 2 is matched with the width of a rectangular groove 4, and the width of a two-edge positioning block 5 is matched with the width of the one-time forming male die 1.
The inside edge and the outside edge of the rectangular groove 4 of the lower part forming die are arc-shaped round corners, the inside edge of the folding positioning block 5 is arc-shaped round corners, and the side edges of the one-step forming male die 1 and the secondary forming male die 2 are arc-shaped round corners.
The secondary forming terrace die 2 is square post of cross-section squareness, and square post size is the same with the square pipe internal diameter size of waiting to process, square post one end articulated connect with secondary forming push down 8 one ends of support, and the secondary forming push down 8 other ends of support is equipped with the connecting piece 9 of connecting square post, and this connecting piece 9 pushes down support 8 for can dismantling square post of separation and secondary forming.
Lower part forming die includes bottom template 10, middle part post forming die 11 and two components of a whole that can function independently mould 12, and each part is detachable construction, middle part post forming die 11 is fixed in the side middle part position of going up of bottom template 10, and the centre of post forming die 11 sets up rectangular channel 4, two components of a whole that can function independently mould 12 divide and establish in the both sides of post forming die 11, and one components of a whole that can function independently mould 12 bottom is fixed on bottom template 10, and one components of a whole that can function independently mould 12 is close to post forming die 11 and is the plane for the top face, and the border position is outstanding hem locating piece 5.
The outer side of the top of the flanging positioning block 5 is provided with a limiting bulge 13, a metal plate to be machined and formed is placed on the flanging positioning block 5, and the two sides of the metal plate are limited by the flanging positioning block 5.
The one-step forming male die 1 is of a split structure and is respectively arranged on two sides of the secondary forming male die 2, the rear parts of the one-step forming male die 1 and the secondary forming male die 2 are respectively provided with a guide mechanism and a hydraulic driving mechanism, and the hydraulic driving mechanism on the rear part of the split one-step forming male die 1 synchronously drives the one-step forming male die 1 to move.
The connecting piece 9 comprises a locking hole arranged on the end face of the square column, a fixing hole on the secondary forming pressing support 8 and a rotating lock pin, wherein the rotating lock pin comprises a fixing shaft and a rotating pin, the fixing shaft is arranged in the fixing hole, the rotating pin is arranged in the locking hole, and the rotating pin is manually or mechanically driven to pull out or insert the rotating pin from or into the locking hole.
The rectangular tube forming hydraulic machine is internally provided with a rectangular tube integral forming die, and has a structure shown in figure 5, the hydraulic machine comprises a bottom seat 14, a top frame 15 and a support column 16, the lower forming die is arranged on the bottom seat 14 of the hydraulic machine, the upper forming die is arranged below the top frame 15 of the hydraulic machine, a primary forming pressing oil cylinder 17 and a secondary forming pressing oil cylinder 18 are arranged in the top frame 15 of the hydraulic machine, the lower end of a piston rod of the primary forming pressing oil cylinder 17 is connected with the primary forming male die 1, and the secondary forming pressing oil cylinder 18 is connected with the secondary forming male die 2.
The invention relates to a rectangular tube forming method of a rectangular tube forming hydraulic press, which is characterized by comprising the following steps of,
1) the metal plate is horizontally placed between the limit protrusions 13 at both sides of the lower molding die, as in the state of fig. 1,
2) the primary forming male die 1 and the secondary forming male die 2 of the upper forming die are driven by the primary forming pressing oil cylinder 17 and the secondary forming pressing oil cylinder 18 to press downwards, the metal plate is pressed between the flanging positioning blocks 5 of the lower forming die, and the two side edges of the metal plate are bent, as shown in the state in fig. 2;
3) the one-step forming male die is driven by the one-step forming pressing oil cylinder 17 to be lifted upwards to a high position;
4) the secondary forming male die 2 is driven by the secondary forming pressing oil cylinder 18 to continue pressing, the metal plate is pressed into the rectangular groove 4 of the secondary forming female die 11, and the middle part of the metal plate is bent to form a rectangular pipe with an opening seam at the upper part, as shown in the state of fig. 3;
5) the square column and the secondary forming pushing support 8 are detached from the square column one end connecting piece 9 of the primary forming convex die 1, the rectangular tube is moved, the square column is separated from the rectangular tube, and the rectangular tube forming is completed.
The rectangular pipe is processed and formed at one time on one station, so that the processing and manufacturing efficiency of the rectangular pipe is improved;
by designing new die forming equipment, a set of die is used for bending the metal plate into a rectangular square tube, the manufacturing time of single equipment is shortened, and the manufacturing efficiency is improved;
the molding manufacturing at the same position avoids the waste of time caused by multiple clamping due to the subsection manufacturing;
the combination of the forming equipment is realized through a hydraulic press, and the floor area of the equipment is reduced.
Claims (9)
1. A rectangular pipe integral forming die is characterized by comprising a lower forming die and an upper forming die;
the middle part of the lower part forming die is provided with a rectangular groove (4), two sides of the rectangular groove (4) are planes, and the edge position is provided with a protruding flanging positioning block (5), and the width of the rectangular groove (4) is the section thickness or height of a square tube;
the upper forming die comprises a one-step forming male die (1) and a secondary forming male die (2), a secondary male die groove (3) is formed in the middle of the one-step forming male die (1), the secondary forming male die (2) is arranged in the secondary male die groove (3), the width of the secondary forming male die (2) is matched with that of a rectangular groove (4), and the width of a double-flanging positioning block (5) is matched with that of the one-step forming male die (1).
2. A mold for integrally molding a rectangular tube according to claim 1,
lower part forming die's rectangular channel (4) inward flange and outward flange are stupefied for the arc fillet, and the interior angle of hem locating piece (5) is stupefied for the arc fillet, edge is stupefied for the fillet in one shot forming terrace die (1) and secondary forming terrace die (2) side.
3. A rectangular pipe integral molding die according to claim 2, wherein the secondary molding punch (2) is a square column with a square cross section, the size of the square column is the same as the inner diameter of the square pipe to be processed, one end of the square column is hinged with one end of the secondary molding hold-down bracket (8), the other end of the secondary molding hold-down bracket (8) is provided with a connecting piece (9) for connecting the square column, and the connecting piece (9) is used for detachably separating the square column and the secondary molding hold-down bracket (8).
4. The rectangular pipe integral forming die of claim 3, wherein the lower forming die comprises a bottom die plate (10), a middle secondary forming female die (11) and two primary split dies (12), each part is of a detachable structure, the middle secondary forming female die (11) is fixed at the middle position of the upper side surface of the bottom die plate (10), the rectangular groove (4) is arranged in the middle of the secondary forming female die (11), the two primary split dies (12) are respectively arranged at two sides of the secondary forming female die (11), the bottom of the primary split die (12) is fixed on the bottom die plate (10), the top surface of the primary split die (12) close to the secondary forming female die (11) is a plane, and the edge position is a protruding flanging positioning block (5).
5. The rectangular pipe integral forming die of claim 4, wherein the top outer side of the flanging positioning block (5) is provided with a limiting bulge (13), a metal plate to be processed and formed is placed on the flanging positioning block (5), and two sides of the metal plate are limited by the flanging positioning block (5).
6. The integral forming die for the rectangular pipe as claimed in claim 5, wherein the primary forming male die (1) is of a split structure and is respectively arranged on two sides of the secondary forming male die (2), the rear parts of the primary forming male die (1) and the secondary forming male die (2) are respectively provided with a guide mechanism and a hydraulic driving mechanism, and the hydraulic driving mechanism on the rear part of the split primary forming male die (1) synchronously drives the primary forming male die (1) to move.
7. A mold for integrally molding a rectangular tube according to claim 3, wherein the connecting member (9) comprises a locking hole provided on the end face of the square post, a fixing hole provided on the secondary molding hold-down frame (8), and a rotary lock pin comprising a fixing shaft provided in the fixing hole and a rotary pin provided in the locking hole, the rotary pin being manually or mechanically driven to extract or insert the rotary pin from or into the locking hole.
8. A rectangular tube forming hydraulic press is provided with the rectangular tube integral forming die in claim 6 or 7, and is characterized in that the hydraulic press comprises a bottom seat (14), a top frame (15) and a supporting column (16), the lower forming die is arranged on the bottom seat (14) of the hydraulic press, the upper forming die is arranged below the top frame (15) of the hydraulic press, a one-step forming pressing oil cylinder (17) and a secondary forming pressing oil cylinder (18) are arranged in the top frame (15) of the hydraulic press, the lower end of a piston rod of the one-step forming pressing oil cylinder (17) is connected with the one-step forming male die (1), and the secondary forming pressing oil cylinder (18) is connected with the secondary forming male die (2).
9. A rectangular tube forming method by the hydraulic machine for forming rectangular tubes as claimed in claim 8, comprising the steps of,
1) horizontally placing a metal plate between the limiting bulges (13) on the two sides of the lower forming die;
2) the primary forming male die (1) and the secondary forming male die (2) of the upper forming die are driven to press downwards by a primary forming pressing oil cylinder (17) and a secondary forming pressing oil cylinder (18), the metal plate is pressed between the flanging positioning blocks (5) of the lower forming die, and the edges of two sides of the metal plate are bent;
3) the one-step forming male die (1) is driven by the one-step forming pressing oil cylinder (17) to be lifted upwards to a high position;
4) the secondary forming male die (2) is driven by a secondary forming pressing oil cylinder (18) to continue pressing, the metal plate is pressed into the rectangular groove (4) of the secondary forming female die (11), and the middle part of the metal plate is bent to form a rectangular pipe with an opening seam at the upper part;
5) and (3) disassembling the square column and the secondary forming pressing support (8) from the square column one end connecting piece (9) of the primary forming convex mold (1), moving the rectangular pipe, and removing the square column from the rectangular pipe to finish the forming of the rectangular pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277510.8A CN114951364B (en) | 2022-03-21 | 2022-03-21 | Rectangular pipe integrated forming die, hydraulic forming machine and forming method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210277510.8A CN114951364B (en) | 2022-03-21 | 2022-03-21 | Rectangular pipe integrated forming die, hydraulic forming machine and forming method thereof |
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| CN114951364A true CN114951364A (en) | 2022-08-30 |
| CN114951364B CN114951364B (en) | 2023-10-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116652026A (en) * | 2023-07-25 | 2023-08-29 | 双强电子科技(昆山)有限公司 | Stamping forming device and method for machining automobile parts |
| CN117066356A (en) * | 2023-10-17 | 2023-11-17 | 山东宏泰电器有限公司 | Bending riveting equipment for preparing refrigerator liner port-shaped coaming |
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| CN116652026A (en) * | 2023-07-25 | 2023-08-29 | 双强电子科技(昆山)有限公司 | Stamping forming device and method for machining automobile parts |
| CN116652026B (en) * | 2023-07-25 | 2024-01-26 | 双强电子科技(昆山)有限公司 | Stamping forming device and method for machining automobile parts |
| CN117066356A (en) * | 2023-10-17 | 2023-11-17 | 山东宏泰电器有限公司 | Bending riveting equipment for preparing refrigerator liner port-shaped coaming |
| CN117066356B (en) * | 2023-10-17 | 2023-12-22 | 山东宏泰电器有限公司 | Bending riveting equipment for preparing refrigerator liner port-shaped coaming |
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| CN114951364B (en) | 2023-10-13 |
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