CN1033449A - Single layer soldering pipe and manufacture method thereof - Google Patents
Single layer soldering pipe and manufacture method thereof Download PDFInfo
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- CN1033449A CN1033449A CN 87106393 CN87106393A CN1033449A CN 1033449 A CN1033449 A CN 1033449A CN 87106393 CN87106393 CN 87106393 CN 87106393 A CN87106393 A CN 87106393A CN 1033449 A CN1033449 A CN 1033449A
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Abstract
The present invention is single layer soldering pipe and manufacture method thereof.Mainly be applicable to thin-wall steel tube.This brazed tubes is a raw material with the copper facing steel band, through groove handle and the pipe crimping moulding after, cold rolling in the closed type of plug and roll composition, roll the aftershaping pipe and be tight stitching state, with after goods are made in soldering in groove lap-joint.The principal character of these goods is that weld seam and pipe shaft surfaces externally and internally are angled, and solder joint length is about three times of pipe thickness.It has the advantage of seamless pipe and welded tube concurrently, and the intensity of existing seamless pipe has the precision of welded tube again, and has remedied their shortcomings separately to a certain extent.
Description
The invention belongs to brazed tubes and pipe-making method, the brazed tubes goods mainly are applicable to refrigerator, automobile and other household electrical appliance industry etc., and the steel tube forming method mainly is applicable to the manufacturing thin-wall steel tube.
The required tubing of refrigeration, household electrical appliance and auto industry mainly contains three kinds at present: the one, and the U.S. is at the Bandaid pipe (BUNDYWELD) of twentieth century invention; The 2nd, the Hai Kelin pipe (HYCOLIN TUBING) that Japan produces; The 3rd, copper pipe.
The Bandaid pipe is to use the copper facing steel band through the laggard capable hot rolling of double-deck pipe crimping, advances the soldering oven soldering then.All continue to use the more than ten years countries in the world.But because it is double-decker, very harsh to raw-material required precision, require the thickness of strips tolerance be controlled at ± 0.004mm in; Also very strict to the requirement of steel band material simultaneously, therefore, the blank cost is very high, causes tubing to cost an arm and a leg.In addition, Bandaid pipe cooling velocity after soldering is too fast, and the intensity of tubing is higher, and plasticity descends, and electric heater sleeve pipe etc. also need annealing in process, complex process if use the Bandaid pipe.
The Hai Kelin pipe is to adopt the copper facing steel band to carry out the vertical masonry joint butt welding after pipe is shaped to form.Owing to be that the vertical masonry joint butt welding is shaped, so there is the common shortcoming of general welded tube, promptly interior weldering thorn can't be removed, the weldquality instability, and copper plate is discontinuous in the commissure, and outer surface has significantly black printing, and the section metallographic structure is inhomogeneous, and compressive resistance is lower.
The manufacturing procedure complexity of copper pipe, processing lumber recovery low (3 tons of copper rods can be processed into one ton of copper pipe), the cost height costs an arm and a leg; Inner surface is unclean, the strength and stiffness inequality; Moreover the copper natural resources shortage of China, most of by import.
In the tubulation field, active is seamless pipe and welded tube two big technologies.Welded still pipe, especially narrow tube, the weldering thorn is difficult to remove in it, and the metallographic structure of commissure is difficult to reach unanimity with matrix, leaks to weld the defective of welding and happen occasionally the anti-leakage poor performance.Though the production history of seamless steel pipe is longer, also there are the following problems: poor dimensional precision, lumber recovery is low, cost is high, complex process etc.
The object of the present invention is to provide a kind of intensity height, anti-leakage is strong, formability good, precision is high, inwall cleaning and the low brazed tubes of cost, and technology is simple, the lumber recovery height, steady quality does not have the pipe-making method of specific (special) requirements to blank.
Concrete solution is as follows:
It is raw material that the single layer soldering tubing products adopts general homemade low-carbon (LC) copper facing steel band, and steel band is handled through groove.After steel band is rolled into pipe, steel band both sides groove overlap joint.Weld seam after the soldering all has a certain degree with the surfaces externally and internally of pipe, i.e. garden Zhou Fangxiang relatively, and weld seam is an inclined weld.It both had been different from the straight weld of Hai Kelin pipe, was different from full garden week 360 ° of welding of nation's limit pipe again.In the overlap joint zone, cored solder and matrix generate copper-iron alloy, and some exists with fine copper.Overlap has the double shielding effect, makes that the anti-burst intensity of this single layer soldering pipe and same specification are suitable with the seamless steel pipe of kind.When design, the tearing toughness of overlap is higher than the tensile strength of matrix, and therefore, when hole expansion test, cracking is not always at overlap.
The solution of pipe-making method is to adopt the rolling machine shaping steel pipe with eight frames.It is to have set up blank frame in the front of the welded tube rolling machine of seven common frames, i.e. first frame, this frame are carried out groove to the blank steel band and handled.Steel band is by behind the blank frame, and both sides are processed to the groove of required angle and size.Another measure is to have inlayed a guide ring on the 5th breast roller in eight frames, makes the steel band of band groove, through second and third, after four, five frames, just in time makes the groove on both sides approaching, and don't the state of stack, guarantees not deflection in the bend pipe process.The 3rd measure is that plug all is housed in the pass of the 7th, eight frames, the lobed ellipse garden of the plug ball in these two frame passes, and roll and plug form the blind bore type.Like this, after the 7th, eight frames, the groove on steel band both sides overlaps, and can obtain the angled pipe in surface, inside and outside garden of groove and pipe crimping.After the soldering oven soldering, then can be made into required brazed tubes.
This pipe-making method is a new development to traditional welded tube technology.The brazed tubes that adopts this method to produce, its quality and performance and complex art economic indicator all are better than nation's limit pipe and Hai Kelin pipe, are a kind of tubulation new methods with bright prospects.
The single layer soldering pipe of making of this method has the advantage of seamless pipe and welded tube concurrently, and the intensity of existing seamless pipe has the precision of welded tube again, and has remedied their shortcomings separately to a certain extent: compare with seamless pipe, have the precision height, characteristics such as inwall cleaning; Compare with welded tube, have the strong and high advantage of intensity of permeability resistance.
Description of drawings and embodiment.
Accompanying drawing one is the sectional schematic diagram of single layer soldering tubing products of the present invention;
Accompanying drawing two is the technological process of production figure of single layer soldering pipe;
Accompanying drawing three is blank frame (first frame) roll Pass figure;
Accompanying drawing four is the pass figure of the 5th frame;
Accompanying drawing five for the copper facing steel band in the pipe crimping process respectively in the state diagram of each frame.
In the accompanying drawing one, 1 is the brazed tubes main body, and 2 is copper plate, and 3 is solder joint, α be the surfaces externally and internally of inclined weld and brazed tubes at garden Zhou Fangxiang angulation, be 8 °～11 °.
In accompanying drawing two, 11 is uncoiler, and 12 is lubrication box, be the pipe crimping unit in the frame of broken lines, 13,14,15,16,17,18,19,20 first to the 8th frames that are respectively the pipe crimping unit wherein, 21 is flying shearing machine, 22 is stand, and 23 is japanning (scaling powder) machine, and 24 is soldering oven, 25 is stand, 26 is straightener, and 27 is defectoscope, and 28 is Winding machine, 29 is plug, and 30 is edger roll.
Compared with prior art, the pipe crimping forming machine is characterised in that it is made up of eight frames among the present invention. First frame is blank frame, and second to the 8th frame is the shaping frame, and has assembled guide ring at the topping roll of the 5th frame, has designed special pass, in the pass of the 5th to the 8th frame plug is housed.
In the accompanying drawing three, 31 is topping roll, and 32 is bottom roll, α1Cone angle for upper and lower roller cone part is generally 8 °～11 °, and 33 is the roll gap of upper and lower roll edge, is about 0.1mm.
In accompanying drawing four, 41,42 is two parts of topping roll, and 43 is bottom roll, and 44 is guide ring, and 45 is axle.
In the accompanying drawing five, 51,52,53,54,55,56,57,58 be respectively steel band in the pipe crimping process in first to the 8th frame pass separately state.
The forming process of Single-layer soldered pipe is as follows:
After good copper facing steel band uncoiler 11 uncoilings of slitting, enter lubrication box 12, carry out technological lubrication, purpose is cooling and lubricated plug.Enter first frame 13 subsequently and carry out the limit portion groove processing of steel band.By the steel band of this frame, its limit portion is groove shape (seeing 51 in the accompanying drawing five), bevel angle α
1Be 8 °～11 °, limit portion thinnest part is 0.1mm.Steel band begins to manage shaping after handling through groove, at second and third, four frames twist into it half garden shape (seeing 52,53,54 in the accompanying drawing five).During by the 5th frame 17,, can prevent steel band deflection in the bend pipe process because topping roll is equipped with guide ring; For guaranteeing successfully to realize steel band limit portion groove overlap joint, the roll pass radius of topping roll guide ring both sides does not wait, and differs about 1.0mm(and sees accompanying drawing four); By the steel band of this frame, its shape is seen 55 in the accompanying drawing five.Subsequently, under the effect of compression roller, steel band enters the 6th frame in a tubular form and carries out pre-sizing, and purpose is the length that guarantees pipe garden week overlap when rolling.Overlap length (garden Zhou Fangxiang) is generally three times of pipe thickness, steel band carries out 2% to 5% plastic deformation by the closed type that the 7th, eight breast rollers and plug form, so that the elimination strain makes overlap be tight stitching state, for advantageous conditions is created in follow-up soldering.
Forming tube after rolling is pressed behind the fixed ruler cutting and is stacked at stand, and enters soldering oven 24 in batches and carry out soldering.Logical protective gas is protected steel pipe in the soldering oven.1120～1140 ℃ of brazing temperatures, the holding time is 45～60 seconds, will guarantee copper and steel reaction in soldering place of overlap, produces copper-iron alloy, reaches best soldering effect.
During soldering, evenly melt for making copper plate, reach good brazing quality, before entering soldering oven, the steel pipe that is rolled into shape will pass through japanning machine 23, and it is pitch-dark to make the pipe crimping surface be coated with last layer equably.The pitch-dark duricrust shape that under brazing temperature, is of this layer, can prevent effectively the copper layer that melts when steel pipe transports by scratch, loss.
Steel pipe after soldering brushes away surperficial powdery residue in the soldering oven exit with wire brush, through stand 25, delivers to straightener 26.Straightener adopts seven rollers vertical and horizontal two groups.Pipe behind the aligning carries out eddy current inspection through defectoscope 27.The qualified pipe of detecting a flaw gets final product fixed ruler cutting or enters reel machine 27, coils and packs.
The used steel band (blank) of single layer soldering pipe generally can adopt phosphorus content at the 08F steel below 0.15%, 08Al steel, No. 10 steel etc., also can adopt phosphorus content at No. 20 steel, A more than 00.15%
3F steel and B
3F steel etc.; The THICKNESS CONTROL of copper plate is at 10 ± 1 μ (single face).The dimensions of brazed tubes has strict demand to width of steel band, determines width of steel band by following formula:
W＝πK
1K
2（D-h）
W is width of steel band (mm) in the formula; K
1Extend the width of steel band coefficient that causes for limit portion, generally get 1.05～1.08; K
2Be rolling lengthening coefficient, generally get 1.02～1.05; D is brazed tubes external diameter (mm); H is brazed tubes wall thickness (mm).
Width of steel band tolerance behind the slitting is+0.08mm that the thickness of strips tolerance is ± 0.03mm.
Single layer soldering pipe of the present invention is compared with the Hai Kelin pipe, and it is even to have copper facing, and anti-burst intensity height does not have inside and outside burr, and anti-leakage is strong, inwall cleannes advantages of higher; Compare with nation limit pipe, have the steel band required precision lowly, steel band blank source is wide, and technology is simple, and cost is low by about 20%, and advantage such as plasticity is good.
Table 1 has been enumerated single layer soldering pipe of the present invention and the contrast of the Technological Economy overall target of existing steel pipe in the world, is found out that by table 1 Technological Economy overall target of the present invention is better than other steel pipe.
Embodiment
Adopt the present invention to make 3 batches of single layer soldering pipes that condenser for refrigerator is used.The desired specification of goods is φ 4.75 * 0.71mm.The raw material steel band adopts No. 10 steel, and copper facing thickness is 10 μ, and width of steel band is 14.00mm.
Steel band is through uncoiling, and enters first frame by lubrication box after lubricated, carries out the flanging groove and handles.Bevel angle is 10 °, and the width of steel band after groove is handled is 15.30mm.Steel band is through second and third, after four, five frames, and the steel band of band groove is rolled into untight steel coil strip, and again through the 6th, seven, eight frames, the groove overlap joint is rolled into the steel pipe base of required specification.The diameter of mandrel of the 7th frame is 3.22mm, and the diameter of mandrel of the 8th frame is 3.35mm.
The steel pipe base that curl to be shaped through coating machine coat pitch-dark after, enter soldering oven and carry out soldering, brazing temperature is 1130 ℃, the holding time is 50 seconds.6 meters of soldering furnace superintendents, 15 meters of cooling belt lengths, protective atmosphere is unburnt liquefied petroleum gas.
The brazed tubes of coming out from soldering oven promptly becomes final products after aligning, flaw detection.Table 2 has been enumerated the dimensions and the performance of final single layer soldering pipe.
Claims (13)
1, a kind of single layer soldering pipe of being made by the copper facing steel band is characterized in that solder joint is oblique weld seam at garden Zhou Fangxiang, and promptly weld seam becomes the α angle with the pipe shaft surfaces externally and internally, and inclined weld length is about three times of pipe thickness.
2, single layer soldering pipe according to claim 1 is characterized in that the α angle is 8 °～11 °.
3, the manufacture method of the described single layer soldering pipe of a kind of claim 1, the width W that it is characterized in that the copper facing steel band is certain, steel band is handled through the flanging groove of rolling machine first frame that eight frames are formed, the guiding of the 5th frame guide ring, seven, after the plastic deformation of the closed type of eight breast rollers and plug formation, pipe crimping is shaped.
4, manufacture method according to claim 3 is characterized in that the width W of copper facing steel band is determined according to following formula:
W＝πK
1K
2（D-h） （mm）
K in the formula
1Extend the width of steel band coefficient that causes for limit portion, generally get 1.05～1.08; K
2Be rolling lengthening coefficient, generally get 1.02～1.05; D is brazed tubes external diameter (mm); H is brazed tubes wall thickness (mm).
5, manufacture method according to claim 3 is characterized in that steel band after limit portion groove is handled, and bevel angle is 8 °～11 °, and limit portion thinnest part is 0.1mm.
6, manufacture method according to claim 3 when it is characterized in that the steel band that curls passes through the closed type of the 7th, eight breast rollers and plug formation, is carried out 2～5% plastic deformation.
7, manufacture method according to claim 3, it is characterized in that steel band in the pipe crimping forming process in first to the 8th frame pass separately state respectively shown in 51 in the accompanying drawing, 52,53,54,55,56,57,58.
8, manufacture method according to claim 3 is characterized in that steel band enters the 6th frame in a tubular form and carries out pre-sizing, and the length of all overlaps in assurance pipe garden is generally three times of pipe thickness.
9, a kind of special equipment that is used to implement the described manufacture method of claim 3 is characterized in that rolling machine is made up of eight frames, and first frame is a blank frame, and second to the 8th frame is the shaping frame.
10, special equipment according to claim 9 is characterized in that the cone angle of the first breast roller conical section
1It is 8 °～11 °.
11, special equipment according to claim 9 is characterized in that the topping roll of the 5th frame is made up of two parts, inlays guide ring therebetween.
12, special equipment according to claim 11 is characterized in that the roll pass radius of guide ring both sides does not wait.
13, special equipment according to claim 9 is characterized in that in the 7th, the 8th breast roller pass plug being housed, and forms closed pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106393 CN1009622B (en) | 1987-09-21 | 1987-09-21 | Monolayer braze welding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106393 CN1009622B (en) | 1987-09-21 | 1987-09-21 | Monolayer braze welding pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033449A true CN1033449A (en) | 1989-06-21 |
| CN1009622B CN1009622B (en) | 1990-09-19 |
Family
ID=4815683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87106393 Expired CN1009622B (en) | 1987-09-21 | 1987-09-21 | Monolayer braze welding pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009622B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100615A1 (en) * | 2008-02-04 | 2009-08-20 | Weidong Chen | Welding seam stainless steel foil tube |
| CN101992332A (en) * | 2009-08-24 | 2011-03-30 | 美卓造纸机械公司 | Method of repairing a cranny of a metal strip in a fibrous-web machine |
| CN102470488A (en) * | 2009-06-30 | 2012-05-23 | 西门子公司 | Method for cladding a component with a self-supporting cladding closed by cold spraying |
-
1987
- 1987-09-21 CN CN 87106393 patent/CN1009622B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009100615A1 (en) * | 2008-02-04 | 2009-08-20 | Weidong Chen | Welding seam stainless steel foil tube |
| CN102470488A (en) * | 2009-06-30 | 2012-05-23 | 西门子公司 | Method for cladding a component with a self-supporting cladding closed by cold spraying |
| CN101992332A (en) * | 2009-08-24 | 2011-03-30 | 美卓造纸机械公司 | Method of repairing a cranny of a metal strip in a fibrous-web machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1009622B (en) | 1990-09-19 |
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