CN115488196A - Stamping device for thin-wall metal pipe - Google Patents
Stamping device for thin-wall metal pipe Download PDFInfo
- Publication number
- CN115488196A CN115488196A CN202211363280.3A CN202211363280A CN115488196A CN 115488196 A CN115488196 A CN 115488196A CN 202211363280 A CN202211363280 A CN 202211363280A CN 115488196 A CN115488196 A CN 115488196A
- Authority
- CN
- China
- Prior art keywords
- pressure
- metal pipe
- bearing
- bearing piece
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- 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 pipe is characterized in that a bending piece and a pressure-bearing piece are sequentially connected in series to be placed in the metal pipe in a lining manner, and the metal pipe is assisted to deform under pressure from an inner support. The bending part is composed of a pair of inner screws which are coaxial with the fan-shaped shaft and can rotate around the fan-shaped shaft, can rotate in the forward direction to be close to each other and can also rotate in the reverse direction to be close to each other, and then can be arranged at a concave part and a convex part of the deformation, and is convenient to be drawn out from the metal pipe after the deformation. By adopting the pressure-bearing piece made of thermoplastic materials, the pressure-bearing piece has certain compression-resistant hardness at normal temperature, and can be softened after being heated so as to be conveniently drawn out of the metal pipe. Its simple structure, convenient to use, repeatedly usable after the pressure-bearing piece is stereotyped once more, the inside lining can concatenate the shaping according to the demand, has very strong practicality and extensive suitability.
Description
Technical Field
The invention relates to a punching device, in particular to a punching device for a thin-wall metal pipe.
Background
The stamping is a forming method in which a press and a die are used to apply an external force to a plate, a strip, a pipe, a profile, etc. to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) with a desired shape and size.
The stamping and forging are plastic working (or called pressure working), and are called forging and pressing together. The stamped blanks are mainly hot and cold rolled steel sheets and strips. There are also a large number of stamped parts in products such as instruments, household appliances, bicycles, office machines, and household utensils.
In the process of deforming a thin-walled metal tube by a conventional punching device, the thin wall of the metal tube is easily deformed excessively by an excessive or too fast force, and thus, defects are easily 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 of 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 solutions:
a stamping device for a thin-wall metal tube comprises an upper die, a lower die and a lining, wherein the upper die and the lower die are matched with each other, and the lining is arranged in the metal tube;
the inner cavities of the upper die and the lower die are matched with the deformed metal pipe;
the lining comprises a bending part and a bearing part, wherein the bending part comprises a sector shaft provided with a middle rotating shaft and a pair of inner screws 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 rod is provided with external threads for screwing the end part of the pressure bearing piece and sequentially connecting the pressure bearing pieces in series; the sector shaft of the bending part is arranged at the deformation position of the metal pipe, and the pressure-bearing part is arranged at the straight pipe;
the pressure-bearing piece is made of thermoplastic materials, and a heating assembly is arranged in the pressure-bearing piece along the length direction; the heating component is powered by a main conducting sheet arranged on two end faces of the pressure-bearing piece, auxiliary conducting sheets arranged on two end faces of the bending piece and a conducting circuit arranged in the bending piece and connecting the auxiliary conducting sheets on the two end faces; when the bending piece and the pressure-bearing piece are in a screw connection state, the main conducting plate and the auxiliary conducting plate are connected in a connection mode.
The middle rotating shaft of the fan-shaped shaft is made of magnetic materials;
and magnetic blocks magnetically attracted with the middle rotating shaft are arranged at the protruding ends of the upper die and the lower die.
The longitudinal section of the inner screw rod is in a right trapezoid shape; along the horizontal direction, the angle of the right trapezoid connected with the middle rotating shaft is an acute angle, and the pair of inner screws are symmetrically arranged relative to the central line of the fan-shaped shaft.
The upper die is driven to be pressed down by the control device through the 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 the feedback of the pressure sensor.
The pressure-bearing piece is internally provided with a temperature sensor and is connected with the control device through a conductive circuit;
the control device opens and closes the heating assembly according to the feedback of the temperature sensor.
The heating component is made of flexible materials.
The thermoplastic material includes polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyformaldehyde, polycarbonate, polyamide, acrylic plastics, other polyolefines and their copolymer, polysulfone, polyphenylether and chlorinated polyether.
Furthermore, the fan-shaped shaft and the inner screw rod are made of hard metals including iron and stainless steel.
The invention has the advantages that:
a stamping device for a thin-wall metal pipe is characterized in that a bending piece and a pressure-bearing piece are sequentially connected in series to be a lining and are placed in the metal pipe, and the metal pipe is assisted to deform under pressure from an inner support. The bending piece is composed of a pair of inner screws which are coaxial with the fan-shaped shaft and can rotate around the fan-shaped shaft, can rotate in the forward direction to be close to each other and can also rotate in the reverse direction to be close to each other, and then can be arranged at a sunken part and a protruding part of deformation, and is convenient for being drawn out from the metal pipe after deformation. By adopting the pressure-bearing piece made of thermoplastic materials, the pressure-bearing piece has certain compression-resistant hardness at normal temperature, and can be softened after being heated so as to be conveniently drawn out of the metal pipe.
The stamping device for the thin-wall metal pipe has the advantages of simple structure, convenience in use, reusability of the pressure-bearing piece after the pressure-bearing piece is shaped again, capability of forming the lining in a series connection mode according to requirements, and strong practicability and wide applicability.
Drawings
Fig. 1 is a schematic structural view of a punching apparatus for a thin-walled metal tube.
Fig. 2 is a schematic structural view of the bending member and the pressure-bearing member sequentially screwed.
Fig. 3 is a schematic structural view of the sub conductive sheet.
Fig. 4 is a schematic structural view of the main conductive sheet.
The designations in the drawings have the following meanings: 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 fan-shaped shaft, 7, an inner screw rod, 8, a pressure-bearing part, 9, an auxiliary conducting strip, 10, a main conducting strip, 11 and a heating assembly.
Detailed Description
The invention is described in detail below with reference to the figures and the embodiments.
A stamping device for a thin-wall metal pipe comprises an upper die 2, a lower die 3 and a lining arranged in the metal pipe, wherein the upper die 2 and the lower die 3 are matched with each other.
And in the die closing state, an inner cavity between the upper die 2 and the lower die 3 is matched with the metal pipe subjected to stamping deformation.
The lining consists of a bending part and a pressure bearing part 8; the bending part consists of a fan-shaped shaft 6 and a pair of inner screws 7, a middle rotating shaft 5 is arranged at the axis of the fan-shaped shaft 6, the longitudinal section of each inner screw 7 is in a right trapezoid shape, external threads are arranged on the top surface and the bottom surface, 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 fan-shaped 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 central rotating shaft 5, as shown in fig. 3.
The external thread of the internal screw 7 is used for screwing the thread groove at the end part of the bearing part 8. As shown in fig. 2, a plurality of bending pieces and the pressure-bearing piece 8 are sequentially screwed end to end; after being matched with a stamped metal pipe, the fan-shaped shaft 6 of the bending piece is arranged at the deformation part of the metal pipe and is used for bearing pressure at an end angle; the pressure-bearing piece 8 is arranged at the straight pipe and used for maintaining the pipe shape.
Along the length direction, the heating assembly 11 is arranged in the pressure bearing part 8, and a main conductive sheet 10 connected with the heating assembly 11 is arranged in a thread groove at the end part of the pressure bearing part 8. The end face of the inner screw 7 is provided with an auxiliary conducting strip 9 connected with a main conducting strip 10 in a connection mode, a conducting circuit for connecting the auxiliary conducting strips 9 on the two end faces is arranged in the bending piece, and a power supply supplies power to the heating assembly 11 through the main conducting strip 10, the auxiliary conducting strip 9 and the conducting circuit which are connected in series in a connection mode.
The material of the pressure-bearing member 8 is preferably thermoplastic material, including polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic plastic, other polyolefins and copolymers thereof, polysulfone, polyphenylene oxide, and chlorinated polyether.
The material of the heating element 11 is preferably a flexible material, including copper.
The material of the sector 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 a 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 to be pressed down by a control device 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 part 8 is internally provided with a temperature sensor which is connected with a control device through a conductive circuit, and the control device opens and closes the heating component 11 according to the feedback of the temperature sensor or through a power supply.
When the utility model is used in practice,
according to the metal pipe deformed by punching, the pressure-bearing piece 8 with proper length and a plurality of bending pieces are selected to be connected in series in turn to form a lining and are placed into the metal pipe of the straight pipe.
The metal pipe with the built-in 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 middle rotating shaft 5 of the bending piece in the metal pipe are magnetically attracted with each other to form positioning.
The upper die 2 is continuously pressed down, and the metal pipe is bent and deformed along the cavity of the lower die 3 to the structure shown in fig. 1. During the deformation process, the inner screw 7 of the bending part rotates around the middle rotating shaft 5, and the exposed fan-shaped shaft 6 has a supporting effect on the bending part. The bearing part 8 connected with the inner screw 7 has bearing and supporting effects on the straight pipe section.
After the punching is finished, the control device drives the power supply to heat the pressure-bearing piece 8 through the heating component 11, the pressure-bearing piece 8 is made of thermoplastic materials, and the pressure-bearing piece 8 is softened after being heated to remove the hard state; the liner is pulled out from either end of the deformed metal tube. A pair of inner screws 7 of the bending piece can rotate clockwise to be close to each other or rotate anticlockwise to be close to each other around the fan-shaped shaft 6, so that the bending piece in the concave part in the middle can be smoothly drawn out through the protruding part at the end part by rotating reversely.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
Claims (9)
1. A stamping device for a thin-wall metal tube is characterized by comprising an upper die, a lower die and a lining, wherein the upper die and the lower die are matched with each other, and the lining is arranged in the metal tube;
the inner cavities of the upper die and the lower die are matched with the deformed metal pipe;
the lining comprises a bending part and a bearing part, wherein the bending part comprises a sector shaft provided with a middle rotating shaft and a pair of inner screws 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 rod is provided with external threads for screwing the end part of the pressure bearing piece and sequentially connecting the pressure bearing pieces in series; the sector shaft of the bending part is arranged at the deformation position of the metal pipe, and the pressure-bearing part is arranged at the straight pipe;
the pressure-bearing piece is made of thermoplastic materials, and a heating component is arranged in the pressure-bearing piece along the length direction; the heating assembly is powered by the main conducting sheets arranged on the two end faces of the pressure-bearing piece, the auxiliary conducting sheets arranged on the two end faces of the bending piece and the conducting circuits arranged in the bending piece and connected with the auxiliary conducting sheets on the two end faces;
when the bending piece and the pressure-bearing piece are in a screw connection state, the main conducting plate and the auxiliary conducting plate are connected in a connection mode.
2. The stamping device of claim 1, wherein the central axis of rotation of the fan-shaped shaft is magnetic;
and magnetic blocks magnetically attracted by the middle rotating shaft are arranged at the protruding ends of the upper die and the lower die.
3. The stamping device of claim 1, wherein the inner screw has a right trapezoid longitudinal cross-section; along the horizontal direction, the angle of the right trapezoid connected with the middle rotating shaft is an acute angle, and the pair of inner screws are symmetrically arranged relative to the central line of the fan-shaped shaft.
4. Press according to claim 1, characterised in that the upper die is pressed down by a control device driven by a hydraulic ram.
5. The punching device as claimed in claim 4, wherein the lower die is provided with a pressure sensor on the bottom surface thereof, and the control device opens and closes the hydraulic rod according to the feedback of the pressure sensor.
6. The stamping device as claimed in claim 1, wherein the pressure-bearing member is internally provided with a temperature sensor and is connected with the control device through a conductive circuit;
the control device opens and closes the heating assembly according to the feedback of the temperature sensor.
7. The stamping apparatus of claim 1, wherein the heating element is a flexible, ductile material.
8. The stamping apparatus as defined in claim 1, wherein the thermoplastic material comprises polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic, other polyolefins and copolymers thereof, polysulfone, polyphenylene oxide, chlorinated polyether.
9. The stamping device of claim 7, wherein the segment shaft and the inner screw are made of hard metals including iron and stainless steel.
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 true CN115488196A (en) | 2022-12-20 |
| CN115488196B CN115488196B (en) | 2023-09-08 |
Family
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 (6)
| 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 |
| US20130031947A1 (en) * | 2011-08-03 | 2013-02-07 | Tingley William Q | Apparatus and method of manufacturing a split link for use in a flexible tube-bending mandrel |
| 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 |
-
2022
- 2022-11-02 CN CN202211363280.3A patent/CN115488196B/en active Active
Patent Citations (6)
| 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 |
| US20130031947A1 (en) * | 2011-08-03 | 2013-02-07 | Tingley William Q | Apparatus and method of manufacturing a split link for use in a flexible tube-bending mandrel |
| 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 |
|---|---|
| CN115488196B (en) | 2023-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106903194B (en) | A method of improving the metal 3 D auto bending forming limit | |
| CN115488196A (en) | Stamping device for thin-wall metal pipe | |
| TWI597106B (en) | Double-acting variable cross-section extrusion device and extrusion method | |
| CN111036814A (en) | Special-shaped multi-way joint multi-way flexible loading integral forming device and method | |
| CN219378592U (en) | Sheet metal stamping die | |
| CN217596368U (en) | Bending device pipe for water outlet pipe machining | |
| CN2049565U (en) | Small bending radius u form pipe bender | |
| CN212704213U (en) | Heating device for forging and pressing round rod-shaped workpiece | |
| TWI616245B (en) | Extrusion device and method for manufacturing variable curvature extrusion | |
| CN210435213U (en) | Large-scale steel sheet stamping die | |
| CN210023351U (en) | Aluminum plate bending and stamping device | |
| CN114346002A (en) | Stainless steel plate bending device | |
| CN212884634U (en) | Anti-falling structure for stainless steel strip of rolled product for smelting ferrous metal | |
| CN218982731U (en) | Stainless steel plate flattening machine | |
| CN112692126A (en) | Oil-free bent pipe processing method | |
| CN107983813A (en) | A kind of method of belt restraining pipe axis pressure synchronous forming plate heat exchanger grommet | |
| CN210936644U (en) | Stamping equipment is used in traffic facilities processing | |
| CN216175930U (en) | High-efficient five metals forming die | |
| CN104722677A (en) | Vertical necking machine | |
| CN105583268A (en) | Pressing bending process device capable of forming multiple bends | |
| CN213079848U (en) | Conical press for end socket | |
| CN219664827U (en) | Metal bellows preparation facilities | |
| CN214683605U (en) | Copper return bend rounding device | |
| CN212598409U (en) | Flanging and bulging device for stamping | |
| CN205818431U (en) | A kind of straight tube bending shaped device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |