CN100457310C - Straightening method and apparatus for small-diameter thin-wall metal tube - Google Patents
Straightening method and apparatus for small-diameter thin-wall metal tube Download PDFInfo
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- CN100457310C CN100457310C CNB200610172259XA CN200610172259A CN100457310C CN 100457310 C CN100457310 C CN 100457310C CN B200610172259X A CNB200610172259X A CN B200610172259XA CN 200610172259 A CN200610172259 A CN 200610172259A CN 100457310 C CN100457310 C CN 100457310C
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Abstract
The invention relates to a method for aligning the fine-diameter fine-wall metal tube, wherein the invention is characterized in that: it puts fine-diameter fine-wall metal tube into vacuum frame, heats it with thermal current, and functions drawing force at two ends to align it. And it can thermally align the high-flexibility high-strength fine-diameter fine-wall tube at vacuum condition, to align several tubes at one time, as TiNi memory alloy, CoCrMo alloy, etc, and the tube whose outer diameter is smaller than 3mm.
Description
Technical field
A kind of straightener of small-diameter thin-wall metal tube relates to the carefully device of the aligning typing use of footpath thin-walled capillary tubes of a kind of high resiliency, high-intensity metal.
Background technology
The aligning of metal current tubing can utilize conventional methods such as multiple roll precision leveller, flexible aligning, stretcher leveling to finish.The workspace of multiple roll precision leveller is made up of a plurality of steel riders, workpiece is on one side around self axis rotation, advance on one side, process and tubing direction of advance are angled and have between the hyp roll repeatedly crooked, it is aligned gradually, and external diameter Φ 3mm is following, the aligning of the thin footpath light-wall pipe of wall thickness between 0.05～0.2mm but can not finish.Flexible aligning is by one section flexible hollow flexible pipe of driven by motor, make it around the central axis high speed rotating, the flexible pipe curvature-adjustable, tubing passes the flexible pipe centre bore and does the constant speed rotation with it after surface lubrication, after the inverse hyperbolic type bending of doing the convexity gradual change, promptly reach the aligning purpose.But for high strength, fine-radial thin-wall pipes that elasticity is big, not only flexible leveling effect is very little and brittle failure takes place easily.Stretcher leveling is to apply pulling force to workpiece to make it be stretched to whole end face upper stress to meet or exceed yield limit, remove pulling force after, the bullet amount of contracting equates or near equating, this moment, workpiece became straight or curvature reduces, thereby obtained correcting.Because titanium alloy elastic is replied big, and some titanium alloy (as the TiNi alloy) has SME, and simple stretcher leveling can not achieve the goal.
Disclose a kind of method of aligning titanium and titanium alloy wire in U.S. Pat 6077369A, its concrete grammar is: wire rod S is arranged between the heating and maintenance equipment of active electrode.The heating wire rod, utilizing afterwards can support stretching wire rod, aligns.Japan Patent JP-25815 has mentioned rectifying under vacuum state titanium alloy product has been aligned in case oxidation.And a common ground of the related aligning material of United States Patent (USP) 6077369 and Japan Patent JP-25815 is to be the block solid material.When they during at heating-straightening temperature higher usually (because of its cross-sectional area bigger); otherwise can't realize softening and aligning; therefore dark by aligning material surface degree of oxidation down, the oxide skin of atmosphere is thicker only belongs to low-level vacuum protection; at high temperature surperficial mild oxidation is inevitable, so this two classes material will be carried out surface-brightening processing (adopting methods such as grinding) usually after strong.Owing to the straightening temperature height, the material internal microscopic structure can change (transformation mutually etc. can be grown up or take place to crystal grain), and then can have influence on the mechanical property of material.In addition,, rectified material also will produce necking phenomenon because straightening temperature height, tension force apply wide ranges, and original size after causing material to be rectified (as external diameter etc.) obviously diminish, dimensional accuracy can't guarantee (also being like this) behind surfacing.Therefore, above-mentioned two patents are primarily aimed at half-finished aligning (generally having adopted this technology the domestic nineties in last century to titanium rod wire rod aligning).This is solid block materials based on them also, allows them to carry out secondary through the later stage at surface state, physical dimension, internal microstructure and mechanical property and handles, carries out secondary then and reprocesses to finished product.
United States Patent (USP) 6077369 and Japan Patent JP-25815 disclosed method, be difficult to adapt to following, the capillary of wall thickness between 0.05～0.2mm of Φ 3mm, its material characteristics is that external diameter is tiny, wall thickness is very thin and is hollow, this class material does not allow maybe can't be implemented in surface state, physical dimension, internal microstructure and mechanical property to carry out secondary and handles (allowing trickle processing such as surperficial rinsing and cut-out certainly) again, therefore belongs to the category of finished product aligning.So when aligning 1) heating-up temperature is very low: realize easily because of the capillary cross-sectional area is very little, and the low temperature aligning is also very small to internal microstructure and mechanical property influence.2) vacuum is very high: handle otherwise be difficult to light after the inside and outside wall oxidation of capillary, promptly enable to handle also and can produce the significant adverse influence to geometric accuracy control.3) the aligning elongation is wanted strict control: otherwise the capillary physical dimension will cause a large amount of waste products after overproof and can't save.
Summary of the invention
The objective of the invention is deficiency at above-mentioned prior art existence, propose a kind ofly can effectively prevent or reduce tubing when thermal straightening and element generation chemical reactions such as H, O, pollute tube surfaces, influence final mechanical property, the straightener of the small-diameter thin-wall metal tube that the aligning typing is effective.
The objective of the invention is to be achieved through the following technical solutions.
A kind of straightener of small-diameter thin-wall metal tube, its aligning process be with small-diameter thin-wall metal tube in the housing of vacuum state, after small-diameter thin-wall metal tube applied heating current and be heated, impose at two ends again that tensile force aligns; The Electric heating that its aligning process adopts makes it from body heating carrying out tension straingtening for workpiece two ends electric current in addition; It is characterized in that its structure composition comprises:
Vaccum case-this housing be one at one end vertically be divided into two sections, by flange coupling horizontal type shell together, on housing, be provided with vacuum-pumping tube;
Housing seal assembly-this assembly is positioned at the housing horizontal end, is one to pass housing with outer wall and with affixed tubular annular seal space be arranged in the airtight and watertight padding in chamber and withhold seal pressure cap composition affixed with the annular seal space bolt on filler;
Thick stick-this circle thick stick is two sections to circle, and one section is the round thick stick of transmission for fixing circle thick stick, one section, and coaxial with vaccum case respectively, level is positioned at the vaccum case two-piece housing, and the one end passes housing respectively, and an end termination that is positioned at housing is provided with Workpiece clamping head; Wherein the transmission circle thick stick annular seal space that passes housing one end is sealed by it, and fixing circle thick stick passes housing and frame is affixed;
Turn-screw-this leading screw is vertically fixed on the frame, and an end connects with transmission circle thick stick by converter.
The straightener of a kind of small-diameter thin-wall metal tube of the present invention is characterized in that being provided with observation window on housing.
Device of the present invention carries out the tension force thermal straightening to high resiliency, high-intensity fine radial thin-wall pipes under vacuum state.Owing to be under vacuum state, to implement aligning, prevent or reduced tubing when thermal straightening and element generation chemical reactions such as H, O, pollute tube surfaces, influence final mechanical property; Adopt Electric heating to give the workpiece two ends in addition suitable electric current (voltage), it is generated heat from body, apply certain tensile force at the workpiece two ends then.Apply electric current by giving by strong workpiece, it is softening that it is heated up, and imposes tension force at length direction simultaneously, to reach the aligning purpose.Can realize comprising that titanium alloy, TiNi marmem, CoCrMo alloy etc. are high-strength, high-elastic, room temperature is hard and crisp, the typing of the aligning of the metal fine-radial thin-wall pipes of the easy oxidation of high temperature, and the aligning back is little to the material property influence, aligning back tubing glacing flatness can reach below the 0.5mm/m, has that equipment is simple, a convenient and flexible operation, characteristics such as economical and practical.
The present invention can realize various metal capillaries such as once many (root) aligning intensity height, titanium alloy that elasticity is big, TiNi marmem, CoCrMo alloy, stainless steel, also can be used for the aligning of the following above-mentioned metal filament material of external diameter Φ 3mm, have characteristics such as equipment is simple, convenient and practical, economical and efficient.
Description of drawings
Fig. 1 is the structural representation of device of the present invention.
The specific embodiment
A kind of straightener of small-diameter thin-wall metal tube, its aligning process be with small-diameter thin-wall metal tube in the housing of vacuum state, after small-diameter thin-wall metal tube applied heating current and be heated, impose at two ends again that tensile force aligns.The Electric heating that its aligning process adopts makes it from body heating carrying out tension straingtening for workpiece two ends electric current in addition.
Below in conjunction with accompanying drawing method of the present invention and device are further described.
A kind of straightener of small-diameter thin-wall metal tube, its structure is formed and is comprised: vaccum case 1-this housing be one at one end vertically be divided into two sections, by flange coupling horizontal type shell together, on housing, be provided with vacuum-pumping tube 2; Housing seal assembly-this assembly is positioned at the housing horizontal end, is one to pass housing with outer wall and with affixed tubular annular seal space 3 be arranged in the airtight and watertight padding 4 in chamber and withhold on filler with the affixed seal pressure cap 5 of annular seal space bolt and form; Thick stick-this circle thick stick is two sections to circle, and one section is the round thick stick 7 of transmission for fixing circle thick stick 6, one section, and coaxial with vaccum case respectively, level is positioned at the vaccum case two-piece housing, and the one end passes housing respectively, and an end termination that is positioned at housing is provided with Workpiece clamping head 8; Wherein the transmission circle thick stick annular seal space that passes housing one end is sealed by it, and fixing circle thick stick passes housing and frame 9 is affixed; Turn-screw 10-this leading screw is vertically fixed on the frame, and an end connects with transmission circle thick stick by converter 11.
Revolve 45 degree positions in the middle of the vaccum case on 1/2 place's level one observation window 12 is set, settle a pore to be connected with Pressure gauge 13 in shell end so that detect vacuum in the housing, transformer 14 and silicon-controlled voltage regulation device 15 are united to Workpiece clamping head provides heating current, vavuum pump 16 is for providing vacuum state in the housing, the slick and sly matter of circle thick stick any surface finish is hard, adopt movable sealing to cooperate with housing, circle thick stick one end is fixedlyed connected with Workpiece clamping head, the other end is fixedlyed connected with turn-screw, when the driven by motor turn-screw moves, through the Workpiece clamping head that drives to of exertin, drive is moved radially by strong capillary and reaches the aligning purpose.
Embodiment
Vaccum case is opened, Φ 2mm * 0.15 titanium alloy capillary tubes is fixed on the Workpiece clamping head 4, close vaccum case, start vavuum pump, observe Pressure gauge, after treating that vacuum reaches requirement (1Pa is following), start the silicon-controlled voltage regulation device, apply electric current gradually to 50A (voltage 40V) for the tubing two ends, (it is little red that the surface becomes) starts stepless speed-change motor when adding heat request when reaching, regulate rotating speed of motor and make it to drive the radially mobile 1-10mm of leading screw (tubing longitudinal extension amount is less than 2%), leading screw drives the circle thick stick and drives to Workpiece clamping head, Workpiece clamping head drives capillary tubes thereupon and radially slowly moves, during this time at any time by observation window inspection aligning situation. aligning is closed the silicon-controlled voltage regulation device after finishing, treat the tubing temperature back (about 10-20 minute) that descends, open the vacuum valve venting, open the capillary tubes that the vaccum case taking-up aligned and get final product.
Claims (2)
1. the straightener of a small-diameter thin-wall metal tube, its aligning process be with small-diameter thin-wall metal tube in the housing of vacuum state, after small-diameter thin-wall metal tube applied heating current and be heated, impose at two ends again that tensile force aligns; The Electric heating that its aligning process adopts makes it from body heating carrying out tension straingtening for workpiece two ends electric current in addition; It is characterized in that its structure composition comprises:
Vaccum case-this housing be one at one end vertically be divided into two sections, by flange coupling horizontal type shell together, on housing, be provided with vacuum-pumping tube;
Housing seal assembly-this assembly is positioned at the housing horizontal end, is one to pass housing with outer wall and with affixed tubular annular seal space be arranged in the airtight and watertight padding in chamber and withhold seal pressure cap composition affixed with the annular seal space bolt on filler;
Thick stick-this circle thick stick is two sections to circle, and one section is the round thick stick of transmission for fixing circle thick stick, one section, and coaxial with vaccum case respectively, level is positioned at the vaccum case two-piece housing, and the one end passes housing respectively, and an end termination that is positioned at housing is provided with Workpiece clamping head; Wherein the transmission circle thick stick annular seal space that passes housing one end is sealed by it, and fixing circle thick stick passes housing and frame is affixed;
Turn-screw-this leading screw is vertically fixed on the frame, and an end connects with transmission circle thick stick by converter.
2. the straightener of a kind of small-diameter thin-wall metal tube according to claim 1 is characterized in that being provided with observation window on housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610172259XA CN100457310C (en) | 2006-12-30 | 2006-12-30 | Straightening method and apparatus for small-diameter thin-wall metal tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610172259XA CN100457310C (en) | 2006-12-30 | 2006-12-30 | Straightening method and apparatus for small-diameter thin-wall metal tube |
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| Publication Number | Publication Date |
|---|---|
| CN1994606A CN1994606A (en) | 2007-07-11 |
| CN100457310C true CN100457310C (en) | 2009-02-04 |
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| CNB200610172259XA Active CN100457310C (en) | 2006-12-30 | 2006-12-30 | Straightening method and apparatus for small-diameter thin-wall metal tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028675A (en) * | 2012-11-26 | 2013-04-10 | 南京航空航天大学 | High temperature stress relaxation straightening method of titanium alloy wire and device thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542705C (en) * | 2007-12-06 | 2009-09-23 | 上海交通大学 | Full-automatic on-line method for gag press straightening jackrod |
| CN112496094B (en) * | 2020-12-15 | 2023-03-17 | 西部新锆核材料科技有限公司 | Straightening device and method for zirconium alloy thin-walled pipe |
| CN115976438A (en) * | 2022-12-28 | 2023-04-18 | 西安圣泰金属材料有限公司 | Annealing and straightening equipment and annealing and straightening method for titanium alloy bar for ultrasonic scalpel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62214826A (en) * | 1986-03-18 | 1987-09-21 | Mitsubishi Metal Corp | Method for correcting deformation of sintered hard alloy member |
| JPH02258115A (en) * | 1989-03-31 | 1990-10-18 | Mitsubishi Metal Corp | Method for straightening titanium alloy plate |
| JPH0890074A (en) * | 1994-09-20 | 1996-04-09 | Nippon Steel Corp | Method for straightening titanium and titanium alloy wire |
| CN2335719Y (en) * | 1998-03-13 | 1999-09-01 | 西北有色金属研究院 | Metal capillary creep straightening device |
-
2006
- 2006-12-30 CN CNB200610172259XA patent/CN100457310C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62214826A (en) * | 1986-03-18 | 1987-09-21 | Mitsubishi Metal Corp | Method for correcting deformation of sintered hard alloy member |
| JPH02258115A (en) * | 1989-03-31 | 1990-10-18 | Mitsubishi Metal Corp | Method for straightening titanium alloy plate |
| JPH0890074A (en) * | 1994-09-20 | 1996-04-09 | Nippon Steel Corp | Method for straightening titanium and titanium alloy wire |
| US6077369A (en) * | 1994-09-20 | 2000-06-20 | Nippon Steel Corporation | Method of straightening wire rods of titanium and titanium alloy |
| CN2335719Y (en) * | 1998-03-13 | 1999-09-01 | 西北有色金属研究院 | Metal capillary creep straightening device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103028675A (en) * | 2012-11-26 | 2013-04-10 | 南京航空航天大学 | High temperature stress relaxation straightening method of titanium alloy wire and device thereof |
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| CN1994606A (en) | 2007-07-11 |
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