CN115488196B - Stamping device for thin-wall metal pipe - Google Patents
Stamping device for thin-wall metal pipe Download PDFInfo
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- CN115488196B CN115488196B CN202211363280.3A CN202211363280A CN115488196B CN 115488196 B CN115488196 B CN 115488196B CN 202211363280 A CN202211363280 A CN 202211363280A CN 115488196 B CN115488196 B CN 115488196B
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- pressure
- piece
- shaft
- stamping device
- bearing piece
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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
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/08—Bending tubes using mandrels or the like in press brakes or between rams and anvils or abutments; Pliers with forming dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
A stamping device for a thin-wall metal tube is characterized in that a bending piece and a pressure-bearing piece are sequentially connected in series to form a lining, the lining is placed in the metal tube, and the metal tube is supported from inside to be deformed under pressure. The bending piece consists of a pair of inner screws which are coaxial with the fan-shaped shaft and can rotate around the fan-shaped shaft, and the inner screws can be rotated forward to be close to each other and can be rotated reversely to be close to each other, so that the bending piece can be arranged at the concave position and the convex position of deformation, and can be conveniently pulled out of the metal tube after deformation. By adopting the pressure-bearing piece made of thermoplastic materials, the pressure-bearing piece has certain compressive hardness at normal temperature, and can be softened after being heated so as to be conveniently pulled out from the metal pipe. The novel lining is simple in structure, convenient to use, reusable after the pressure-bearing piece is shaped again, and the lining can be formed in series according to requirements, so that the novel lining has strong practicability and wide applicability.
Description
Technical Field
The invention relates to a stamping device, in particular to a stamping device for a thin-wall metal tube.
Background
The stamping is a forming processing method for obtaining a workpiece (stamping part) with a required shape and size by applying external force to plates, strips, pipes, sectional materials and the like by using a press machine and a die to enable the plates, the strips, the pipes, the sectional materials and the like to generate plastic deformation or separation.
Coining and forging are plastic working (or pressure working), and are collectively called forging. The stamped blanks are mainly hot-rolled and cold-rolled steel sheets and strips. There are also a large number of stamping parts in products such as instruments and meters, household appliances, bicycles, office machines, household utensils, and the like.
In the case of thin-walled metal tubes, the wall thickness is easily subjected to excessive deformation by excessive and rapid force during deformation by conventional stamping devices, and defects are generated.
There is therefore a need for a stamping device suitable for thin-walled metal tubes.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a stamping device for a thin-wall metal tube.
In order to achieve the above object, the present invention adopts the following technical scheme:
a stamping device for a thin-wall metal tube comprises an upper die, a lower die and a lining arranged in the metal tube, wherein the upper die and the lower die are matched;
the inner cavities of the upper die and the lower die are matched with the deformed metal tube;
the lining comprises a bending piece and a pressure bearing piece, wherein the bending piece comprises a sector shaft provided with a middle rotating shaft and a pair of inner screws which are concentric with the sector shaft and rotate around the sector shaft based on the middle rotating shaft; the outer side end of the inner screw is provided with an external thread for being in threaded connection with the end part of the pressure bearing piece and is sequentially connected with a plurality of pressure bearing pieces in series; the fan-shaped shaft of the bending piece is arranged at the deformation position of the metal pipe, and the pressure-bearing piece is arranged at the straight pipe;
the pressure bearing piece is made of thermoplastic materials, and a heating component is arranged in the longitudinal direction; the heating component is powered by a conductive circuit comprising a main conductive sheet arranged on two end surfaces of the pressure bearing piece, a secondary conductive sheet arranged on two end surfaces of the bending piece and a secondary conductive sheet arranged in the bending piece and connected with the two end surfaces; when the bending piece and the pressure-bearing piece are in a screwed state, the main conductive piece and the auxiliary conductive piece are connected.
The middle shaft of the fan-shaped shaft is made of magnetic materials;
the protruding ends of the upper die and the lower die are provided with magnetic blocks which are magnetically attracted with the middle shaft.
The longitudinal section of the inner screw rod is right trapezoid; the angle at which the right trapezoid is connected with the transfer shaft is an acute angle along the horizontal direction, and the pair of inner screws are symmetrically arranged relative to the center line of the fan-shaped shaft.
The upper die is driven by a control device to be pressed down through a hydraulic rod.
Further, a pressure sensor is arranged on the bottom surface of the lower die, and the control device opens and closes the hydraulic rod according to feedback of the pressure sensor.
The pressure-bearing member is internally provided with a temperature sensor and is connected with a control device through a conductive circuit;
the control device opens and closes the heating component according to the feedback of the temperature sensor.
The heating component is made of bendable toughness materials.
The thermoplastic material comprises polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic plastic, other polyolefin and copolymer thereof, polysulfone, polyphenylene oxide and chlorinated polyether.
Further, the fan shaft and the inner screw are made of hard metal, including iron and stainless steel.
The invention has the advantages that:
a stamping device for a thin-wall metal tube is characterized in that a bending piece and a pressure-bearing piece are sequentially connected in series to form a lining, the lining is placed in the metal tube, and the metal tube is supported from inside to be deformed under pressure. The bending piece consists of a pair of inner screws which are coaxial with the fan-shaped shaft and can rotate around the fan-shaped shaft, and the inner screws can be rotated forward to be close to each other and can be rotated reversely to be close to each other, so that the bending piece can be arranged at the concave position and the convex position of deformation, and can be conveniently pulled out of the metal tube after deformation. By adopting the pressure-bearing piece made of thermoplastic materials, the pressure-bearing piece has certain compressive hardness at normal temperature, and can be softened after being heated so as to be conveniently pulled out from the metal pipe.
The stamping device for the thin-wall metal pipe has the advantages of simple structure, convenient use, repeated use of the pressure-bearing piece after being shaped again, and tandem connection forming of the lining according to requirements, and has strong practicability and wide applicability.
Drawings
Fig. 1 is a schematic structural view of a stamping device for thin-walled metal tubes.
Fig. 2 is a schematic structural view of the sequential screw connection of the bending member and the pressure-bearing member.
Fig. 3 is a schematic structural view of the auxiliary conductive sheet.
Fig. 4 is a schematic structural view of the main conductive sheet.
The meaning of the symbols in the drawings is as follows: 1. the device comprises a hydraulic rod, 2, an upper die, 3, a lower die, 4, a magnetic block, 5, a middle rotating shaft, 6, a sector shaft, 7, an inner screw, 8, a pressure-bearing member, 9, an auxiliary conducting plate, 10, a main conducting plate, 11 and a heating component.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments.
A stamping device for a thin-wall metal tube consists of an upper die 2, a lower die 3 and a lining arranged in the metal tube.
In the die assembly state, the inner cavity between the upper die 2 and the lower die 3 is matched with the metal tube subjected to stamping deformation.
The lining consists of a bending piece and a pressure bearing piece 8; the bending piece consists of a sector shaft 6 and a pair of inner screws 7, a middle rotating shaft 5 is arranged at the axis of the sector shaft 6, the longitudinal section of each inner screw 7 is in a right trapezoid shape, the top surface and the bottom surface are provided with external threads, the outer side end is a vertical surface, the inner side end is an inclined surface, and the acute angle end of the inner side end is sleeved with the middle rotating shaft 5 and rotates around the sector shaft 6 based on the middle rotating shaft 5; a pair of inner screws 7 are arranged in mirror image to each other based on the intermediate rotary shaft 5 as shown in fig. 3.
The external thread of the internal screw rod 7 is used for being in threaded connection with a thread groove at the end part of the pressure bearing piece 8. As shown in fig. 2, a plurality of bending pieces and a pressure bearing piece 8 are sequentially connected in a screwed mode end to end; after matching with the punched metal pipe, the fan-shaped shaft 6 of the bending piece is arranged at the deformation position of the metal pipe and is used for bearing end angles; the pressure-bearing piece 8 is arranged at the straight pipe for maintaining the pipe shape.
Along the length direction, a heating component 11 is arranged in the pressure-bearing member 8, and a main conductive sheet 10 connected with the heating component 11 is arranged in a thread groove at the end part of the pressure-bearing member 8. The end face of the inner screw 7 is provided with an auxiliary conducting strip 9 connected with a main conducting strip 10, a conducting circuit connected with the auxiliary conducting strips 9 on two end faces is arranged in the bending piece, and a power supply supplies power for the heating component 11 through the main conducting strip 10, the auxiliary conducting strip 9 and the conducting circuit which are connected in series.
The material of the pressure-bearing member 8 is preferably thermoplastic, including polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic plastic, other polyolefin and its copolymers, polysulfone, polyphenylene oxide, and chlorinated polyether.
The heating element 11 is preferably made of a flexible material including copper.
The material of the fan shaft 6 and the inner screw 7 is preferably hard metal, including iron and stainless steel.
The material of the middle rotating shaft 5 of the fan-shaped shaft 6 is preferably magnetic; and magnetic blocks 4 magnetically attracted with the middle rotating shaft 5 are arranged at the protruding ends of the upper die 2 and the lower die 3.
The upper die 2 is driven by a control device to be pressed down through a hydraulic rod 1. The bottom surface of the lower die 3 is provided with a pressure sensor, and the control device opens and closes the hydraulic rod 1 according to the feedback of the pressure sensor. The pressure-bearing piece 8 is internally provided with a temperature sensor which is connected with a control device through a conductive circuit, and the control device is used for starting and stopping the heating component 11 according to the feedback of the temperature sensor or through a power supply.
In the practical use process, the water-based paint can be used,
according to the metal tube which is deformed by stamping, a pressure-bearing piece 8 with proper length and a plurality of bending pieces are selected to be connected in series in sequence to form a lining, and the lining is placed into the metal tube of the straight tube.
The metal tube with the inner lining is placed on the top of the lower die 3, and the control device drives the upper die 2 to press down.
The bottom end of the upper die 2 is abutted to the top of the metal pipe, and the magnetic block 4 at the bottom end of the upper die 2 and the magnetic transit shaft 5 of the bending piece in the metal pipe are mutually magnetically attracted to form positioning.
The upper die 2 is continuously pressed down, and the metal tube is bent and deformed along the concave cavity of the lower die 3 to the structure shown in fig. 1. During the deformation process, the inner screw 7 of the bending piece rotates around the middle rotating shaft 5, and the exposed sector shaft 6 plays a supporting role in the bending part. The pressure-bearing piece 8 connected with the inner screw rod 7 has the pressure-bearing and supporting effects on the straight pipe section.
After stamping is finished, the control device drives the power supply to heat the pressure bearing piece 8 through the heating component 11, the material of the pressure bearing piece 8 is thermoplastic, and the pressure bearing piece is softened after being heated to release the hard state; and (3) extracting the lining from any end of the deformed metal tube. The pair of inner screws 7 of the bending member are rotated clockwise to be drawn toward each other around the passing fan shaft 6, and are rotated counterclockwise to be drawn toward each other, so that the bending member of the middle recess can be smoothly drawn out by reversely rotating the protruding portion of the end portion.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (9)
1. The stamping device for the thin-wall metal pipe is characterized by comprising an upper die, a lower die and a lining arranged in the metal pipe, wherein the upper die and the lower die are matched;
the inner cavities of the upper die and the lower die are matched with the deformed metal tube;
the lining comprises a bending piece and a pressure bearing piece, wherein the bending piece comprises a sector shaft provided with a middle rotating shaft and a pair of inner screw rods which are coaxial with the sector shaft and rotate around the sector shaft based on the middle rotating shaft; the outer side end of the inner screw is provided with an external thread for being in threaded connection with the end part of the pressure bearing piece and is sequentially connected with a plurality of pressure bearing pieces in series; the fan-shaped shaft of the bending piece is arranged at the deformation position of the metal pipe, and the pressure-bearing piece is arranged at the straight pipe;
the pressure bearing piece is made of thermoplastic materials, and a heating component is arranged in the longitudinal direction; the heating component is powered by a conductive circuit comprising a main conductive sheet arranged on two end surfaces of the pressure bearing piece, a secondary conductive sheet arranged on two end surfaces of the bending piece and a secondary conductive sheet arranged in the bending piece and connected with the two end surfaces;
when the bending piece and the pressure-bearing piece are in a screwed state, the main conductive piece and the auxiliary conductive piece are connected.
2. The stamping device of claim 1, wherein the hub of the fan shaft is magnetic;
the protruding ends of the upper die and the lower die are provided with magnetic blocks which are magnetically attracted with the middle shaft.
3. The stamping device of claim 1, wherein the longitudinal cross-section of the inner screw is right trapezoid; the angle at which the right trapezoid is connected with the transfer shaft is an acute angle along the horizontal direction, and the pair of inner screws are symmetrically arranged relative to the center line of the fan-shaped shaft.
4. The stamping device of claim 1, wherein the upper die is depressed by a control device via a hydraulic lever.
5. The stamping device of claim 4, wherein the bottom surface of the lower die is provided with a pressure sensor, and the control device opens and closes the hydraulic rod according to feedback of the pressure sensor.
6. The stamping device of claim 1, wherein the pressure-bearing member is provided with a temperature sensor inside and is connected with the control device through a conductive circuit;
the control device opens and closes the heating component according to the feedback of the temperature sensor.
7. The stamping device of claim 1, wherein the heating element is a pliable material.
8. The stamping device of claim 1, wherein the thermoplastic material comprises polyethylene, polypropylene, polyvinylchloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic, polysulfone, polyphenylene oxide, or chlorinated polyether.
9. The stamping device of claim 7, wherein the fan shaft and the inner screw are made of hard metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211363280.3A CN115488196B (en) | 2022-11-02 | 2022-11-02 | Stamping device for thin-wall metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211363280.3A CN115488196B (en) | 2022-11-02 | 2022-11-02 | Stamping device for thin-wall metal pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115488196A CN115488196A (en) | 2022-12-20 |
| CN115488196B true CN115488196B (en) | 2023-09-08 |
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ID=85115802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211363280.3A Active CN115488196B (en) | 2022-11-02 | 2022-11-02 | Stamping device for thin-wall metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115488196B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19512646A1 (en) * | 1995-04-05 | 1996-10-10 | Behr Gmbh & Co | Method and appts. for finish bending of a pre-bent pipe |
| JP2003053432A (en) * | 2001-08-16 | 2003-02-26 | Akira Akaoka | Device and method for bending metallic pipe |
| JP2005279745A (en) * | 2004-03-30 | 2005-10-13 | Tomita Seisakusho:Kk | Method for bending large diameter steel pipe |
| US7721583B1 (en) * | 2009-05-07 | 2010-05-25 | Proline Pipe Equipment Inc. | Pipe bending shoe |
| CN210995967U (en) * | 2019-11-05 | 2020-07-14 | 东风（十堰）汽车管业有限公司 | Elbow pipe core rod structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9289811B2 (en) * | 2011-08-03 | 2016-03-22 | Tennine Corp. | Apparatus and method of manufacturing a split link for use in a flexible tube-bending mandrel |
-
2022
- 2022-11-02 CN CN202211363280.3A patent/CN115488196B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19512646A1 (en) * | 1995-04-05 | 1996-10-10 | Behr Gmbh & Co | Method and appts. for finish bending of a pre-bent pipe |
| JP2003053432A (en) * | 2001-08-16 | 2003-02-26 | Akira Akaoka | Device and method for bending metallic pipe |
| JP2005279745A (en) * | 2004-03-30 | 2005-10-13 | Tomita Seisakusho:Kk | Method for bending large diameter steel pipe |
| US7721583B1 (en) * | 2009-05-07 | 2010-05-25 | Proline Pipe Equipment Inc. | Pipe bending shoe |
| CN210995967U (en) * | 2019-11-05 | 2020-07-14 | 东风（十堰）汽车管业有限公司 | Elbow pipe core rod structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115488196A (en) | 2022-12-20 |
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