CN2832342Y - Mandrel for manufacturing small curvature radius siphon die - Google Patents

Mandrel for manufacturing small curvature radius siphon die Download PDF

Info

Publication number
CN2832342Y
CN2832342Y CN 200520097792 CN200520097792U CN2832342Y CN 2832342 Y CN2832342 Y CN 2832342Y CN 200520097792 CN200520097792 CN 200520097792 CN 200520097792 U CN200520097792 U CN 200520097792U CN 2832342 Y CN2832342 Y CN 2832342Y
Authority
CN
China
Prior art keywords
mandrel
bending
pipe
sheet bodies
curvature radius
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.)
Expired - Fee Related
Application number
CN 200520097792
Other languages
Chinese (zh)
Inventor
熊雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHIYAN FENGLEI INDUSTRY AND TRADE Co Ltd
Original Assignee
SHIYAN FENGLEI INDUSTRY AND TRADE Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHIYAN FENGLEI INDUSTRY AND TRADE Co Ltd filed Critical SHIYAN FENGLEI INDUSTRY AND TRADE Co Ltd
Priority to CN 200520097792 priority Critical patent/CN2832342Y/en
Application granted granted Critical
Publication of CN2832342Y publication Critical patent/CN2832342Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model relates to a mandrel for manufacturing a die of a bend pipe with a small curvature radius. The purpose of the utility model is to solve the problem that the existing mandrel can not meet the design requirements of an air inflow steel pipe of an engine, a middle cold air pipe, and other metal pipes used in the automobile industry because larger wrinkles can be formed as the existing mandrel bending the bend pipe with a small curvature radius Therefore, the utility model provides the mandrel which is mainly composed of a bending and deforming part and a propelling part, wherein the bending and deforming part is connected with the propelling part. The utility model is characterized in that the mandrel is a flaky bidirectional mandrel; the bending and deforming part of the mandrel is composed of a plurality of small units of sheet bodies; four corners of each sheet body have chamfering edges; the sheet bodies in the same height are arranged in the same layer, and the layers in different heights of the sheet bodies are stacked together orderly; the sheet bodies is different heights are stacked together orderly in a staggered type through metal pins, and the integral body of the sheet bodies presents in a shape of a cylinder. The utility model can enable the thin-wall metal pipe used in the domestic automobile industry to realize 'circular arc overbending' so as to obtain the good effects of reducing intake resistance of the engine, lowering noise, reducing vibration, improving the power of the engine.

Description

A kind of mandrel that is used to make the small curvature radius bend pipe mould
Technical field
The utility model relates to a kind of mandrel of bending mould, particularly relates to a kind of mandrel of making the small curvature radius bend pipe mould.
Background technology
Make the field at bend pipe, the mandrel of used manufacturing small curvature radius bend pipe mould adopts known " universal mandrel " usually.This universal mandrel is made up of 2 to 4 beckets, between ring and the ring certain clearance (mandrel very close to each other can't be out of shape) is arranged, but this gap makes unavoidably metal tube produce apparent in view fold when bending.The place of wrinkle when being exactly the thin-wall metal canal curvature, these gaps takes place, when bending radius during less than 1.5D, the deflection of tube wall reaches 2 to 3 times, gap location at universal mandrel; the support force of light-wall pipe tube wall is not enough and serious wrinkle take place; the back mandrel takes place the wrinkle phenomenon can't extract out is so cooperate the bend pipe of producing the thin-walled small-bend radius that universal mandrel or clavus chain type mandrel all can not be very successful with the method for existing production pipe bending technique.Make requirements such as the engine charge steel pipe of automobile industry use, middle refrigerator pipe adopt the designing requirement of the metal tube between 1 millimeter of wall thickness, the bending radius 0.5D~1.0D not realize, and adopt three sections welderings to solve buckling problems usually by " circular arc curved transitions ".
Summary of the invention
Thereby the objective of the invention is to solve existing mandrel and in crooked small curvature radius bend pipe, form the problem that can't reach the designing requirement of the metal tube between 1 millimeter of wall thickness of requirement employing, the bending radius 0.5D~1.0D such as the engine charge steel pipe of automobile industry use, middle refrigerator pipe than macrofold.For this reason, the present invention proposes a kind of mandrel that is used to make the small curvature radius bend pipe mould, mainly constitute by crooked deformation part and propulsive units, crooked deformation part is connected with propulsive units, it is characterized in that: described mandrel is the two-way mandrel of sheet, the flexural deformation part of mandrel is made of some lamellar body junior units, all there is chamfering at four angles of each sheet lamellar body, the lamellar body of sustained height is at same one deck, orderly stacked together of the lamellar body layer of differing heights, the lamellar body of differing heights is staggered and orderly stacked combining by metallic pin, and its integral body is cylindrical shape.
Mandrel provided by the present invention, its appearance profile is a cylinder, when crooked the gap can not appear, when at the bending metals pipe, this mandrel cooperates the dies cavity that forms just in time identical with the metal tube tube wall shape that is bent with interior bending die, and in the bending deformation process, dies cavity is distortion thereupon also, metal pipe-wall is all finished distortion inside in the metal die chamber, does not almost have the space of wrinkle.The small curvature radius bend pipe that uses the present invention to produce is not increasing under the condition of cost, can substitute 1 millimeter of wall thickness on the parts such as being widely used in car engine air admittance steel pipe, middle refrigerator pipe at present, the bending radius metal tube of " three sections weldings " between 0.5D~1.0D.So the thin-wall metal pipe that the present invention can make the domestic automobile industry use is realized " circular arc curved transitions ", reduce engine charge resistance, reduction noise, minimizing vibrations thereby reach, and can improve the good result of the power of engine.
Description of drawings
Fig. 1 is a Facad structure sketch of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is a use schematic diagram of the present invention.
The specific embodiment
Referring to Fig. 1, Fig. 2, a kind of mandrel that is used to make the small curvature radius bend pipe mould of the present invention mainly is made of crooked deformation part 2 and propulsive units 1.Crooked deformation part 2 links together with propulsive units 1.Mandrel of the present invention is the two-way mandrel of sheet, and crooked deformation part 2 is made of some lamellar bodies 20, and all there is chamfering 200 at four angles of each sheet lamellar body, and the lamellar body of sustained height is being word order with one deck.Orderly stacked together of the lamellar body layer of differing heights, the lamellar body of differing heights is staggered and orderly stacked combining by metallic pin 21, promptly go up lamellasome and two lamellar bodies under it linked together that to make that adjacent two layers are cross-bedding stacked by two metallic pins 21.Its integral body is cylindrical shape, as shown in Figure 3.
Be illustrated in figure 4 as use schematic diagram of the present invention.It is specially: will treat on the crooked crooked deformation part 2 of former pipe embryo 7 through mandrel that an end of former pipe embryo 7 is fixing by clamping force and bending die 8, clamping force is cooperated by clamp 4 and back-up block 3 to be provided, and drives bending die 8 by CNC tube bending machine then and rotates; In former pipe embryo 7 diastrophic processes, give the augmented thrust of two kinds of different directions of tube wall increase of former pipe embryo, wherein on the wall of canal curvature internal diameter, apply the thrust of the internal stress equidirectional of metal contracts generation, in Fig. 4, be shown as power F1 to right, this power is provided by crooked internal diameter boosting piece 5, crooked internal diameter boosting piece 5 contiguous bending dies 8 also contacts with former pipe embryo 7 cambered surfaces and to form normal pressure, and crooked then internal diameter boosting piece 5 is subjected to the pulling with the external force of the internal stress equidirectional of metal contracts generation; On the wall of canal curvature external diameter, apply the thrust of the internal stress equidirectional of metal stretching generation, in Fig. 4, be shown as the power F2 of direction left, this power is provided by crooked internal diameter boosting piece 6, crooked internal diameter boosting piece 6 contacts with former pipe embryo 7 cambered surfaces and forms normal pressure, crooked then internal diameter boosting piece 6 is subjected to the external force pulling of the internal stress equidirectional that produces with metal contracts, treats after former pipe embryo bends to the angle of regulation mandrel to be extracted out.What need explanation in addition is, crooked internal diameter boosting piece 5 contacts, closes on when contacting with bending die 8 clamping with the tube wall of former pipe embryo 7, crooked internal diameter boosting piece 5 can be fixed on the motionless base, at this moment, only depend on the frictional force of 7 of crooked internal diameter boosting piece 5 and former pipe embryos generally just provide as among Fig. 4 to the power F1 of right.

Claims (1)

1. mandrel that is used to make the small curvature radius bend pipe mould, mainly constitute by crooked deformation part and propulsive units, crooked deformation part is connected with propulsive units, it is characterized in that: described mandrel is the two-way mandrel of sheet, the flexural deformation part of mandrel is made of some lamellar body junior units, all there is chamfering at four angles of each sheet lamellar body, the lamellar body of sustained height is at same one deck, orderly stacked together of the lamellar body layer of differing heights, the lamellar body of differing heights is staggered and orderly stacked combining by metallic pin, and its integral body is cylindrical shape.
CN 200520097792 2005-08-22 2005-08-22 Mandrel for manufacturing small curvature radius siphon die Expired - Fee Related CN2832342Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520097792 CN2832342Y (en) 2005-08-22 2005-08-22 Mandrel for manufacturing small curvature radius siphon die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520097792 CN2832342Y (en) 2005-08-22 2005-08-22 Mandrel for manufacturing small curvature radius siphon die

Publications (1)

Publication Number Publication Date
CN2832342Y true CN2832342Y (en) 2006-11-01

Family

ID=37196658

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200520097792 Expired - Fee Related CN2832342Y (en) 2005-08-22 2005-08-22 Mandrel for manufacturing small curvature radius siphon die

Country Status (1)

Country Link
CN (1) CN2832342Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102284574A (en) * 2011-08-18 2011-12-21 凌云工业股份有限公司 Slug for causing car bumper with small bend radius to be arc
CN102161059B (en) * 2009-07-28 2013-08-28 西北工业大学 NC bending core head for thin walled tube of aluminum alloy with major diameter and design method thereof
CN103495630A (en) * 2013-09-29 2014-01-08 上海电机学院 Cold bend forming device for main pipeline of nuclear power station device and core module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102161059B (en) * 2009-07-28 2013-08-28 西北工业大学 NC bending core head for thin walled tube of aluminum alloy with major diameter and design method thereof
CN102284574A (en) * 2011-08-18 2011-12-21 凌云工业股份有限公司 Slug for causing car bumper with small bend radius to be arc
CN103495630A (en) * 2013-09-29 2014-01-08 上海电机学院 Cold bend forming device for main pipeline of nuclear power station device and core module
CN103495630B (en) * 2013-09-29 2015-07-08 上海电机学院 Cold bend forming device for main pipeline of nuclear power station device and core module

Similar Documents

Publication Publication Date Title
Yang et al. The tube bending technology of a hydroforming process for an automotive part
CN100518984C (en) Round pipe steel component arc clod curving forming mould
CN1644264A (en) High-pressure forming method in tubular member for lowering forming pressure
CN101274341B (en) Metal processing and molding method for reducing plastic resilience
CN2832342Y (en) Mandrel for manufacturing small curvature radius siphon die
CN102652042B (en) Method for manufacturing valve umbrella portion of hollow engine valve, press device of valve umbrella portion of hollow engine valve, and hollow engine valve
CN105598265A (en) Overall forming method of small-relative-bending-radius and large-diameter-thickness-ratio thin-walled bent pipe fitting
CN101497096A (en) Device for processing reducer pipe fitting with big section difference and method for shaping the same
CN107952859A (en) A kind of detachable hydraulic expanding die for being used to manufacture S type metal bellows
CN101657278B (en) Method of hydroforming work
CN104438509B (en) A kind of ultra-thin stainless steel bending tube forming method
CN100491010C (en) Shaping method of small curvature radius bend pipe
CN103659167A (en) Pipe fitting machining method
CN201120431Y (en) Round tube steel component arcuated cold bending shaping mold
CN201613286U (en) Complex-section tensile-force winding and forming device
CN103056221A (en) Flexible bending tube die of ball-and-socket joint structure
CN203370886U (en) Elbow pressing machine
CN103658476B (en) A kind of thick-wall hollow forging integral forming method of special-shaped angle head cylindrical band boss
CN100464879C (en) Plate-type wedge rolling precision forming method for camshaft
US20050097935A1 (en) Method for shaping a bent single- or multiple-chamber hollow profile internal high pressure
CN103341535A (en) Tube bending press machine, tube bending method thereof and diesel engine air inlet pipe sheet metal manufacturing method
CN211161504U (en) Bent pipe forming die
JP6665643B2 (en) Manufacturing method and manufacturing apparatus for expanded pipe parts
CN101773974A (en) Forming die for improving blank forging penetration of long shaft type forge piece
CN214184755U (en) Stepping small-curvature pipe bending forming device

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20061101

Termination date: 20140822