CN1049263C - Industrial sewing machine needle and its processing method - Google Patents
Industrial sewing machine needle and its processing method Download PDFInfo
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- CN1049263C CN1049263C CN97121012A CN97121012A CN1049263C CN 1049263 C CN1049263 C CN 1049263C CN 97121012 A CN97121012 A CN 97121012A CN 97121012 A CN97121012 A CN 97121012A CN 1049263 C CN1049263 C CN 1049263C
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- sewing machine
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- needle
- machine needle
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Abstract
The present invention relates to an industrial sewing machine needle and a processing method thereof, which is improved from the existing processing method of the industrial sewing machine needle for enhancing the quality of the industrial sewing machine needle. An included angle is formed by both side faces of a long thread groove of a needle bar of the industrial sewing machine needle, arcs are formed on the crossing points among the side faces and a bottom face, and the side faces and an outer circular side, and the roughness R<a> of the side faces and the bottom face is 0.2 micrometer. The industrial sewing machine needle has the advantages of higher quality, and lower friction in conveying sewing thread. In the processing method of the industrial sewing machine needle, the thread groove is processed by punching instead of milling, so raw materials are saved, and work efficiency is enhanced.
Description
The present invention relates to a kind of industrial improvement with processing method in Sewing needles and the process, is a kind of industrial sewing machine needle and processing method thereof specifically.
Wire casing on the industrial sewing machine needle is used to guide feeded thread, and holds suture in groove, with frictional resistance that overcomes suture and sewing and the harmful heat that produces therefrom.Because traditional grooving method is to adopt Milling Process, makes groove face that tangible cutter trade be arranged, rough surface, its roughness is R
a3.2 being blade-like and being detained some, micron, notch edges be difficult to the thoroughly burr of removal, bottom land back chipping, or rectangular shaped.Thereby problems such as " sanding suture ", " secant ", " fuse " can take place in sewing, be difficult to satisfy the demand of sewing at a high speed.Shortcoming on the industrial sewing machine needle construction mainly is because traditional milling method causes.Its technical process roughly is divided into three sections: moulding---heat treatment---surface treatment.Moulding is crucial, and wherein the fluting of wire casing adopts method for milling processing, and the major defect of this processing method is: in batch machining, because the blunt of cutter or wearing and tearing cause change in size to reach surface damage to wire casing; Make the tangible cutter trade of rooved face, its roughness only is R
a3.2 micron, notch edges are detained some and are difficult to the thoroughly burr of removal; Because the bottom land back chipping has weakened shank intensity; Owing to cut, destroyed the tissue fibers of shank, equally also weakened shank intensity.At present, " winning house " in Germany " Lay mattress " and the U.S. also improves traditional diamond-making technique, but its fluting adopts is original metal lines footpath when feeding intake, without forging the technical scheme that the bar reducing directly carries out press forging, and be that a mould crosspointer is arranged in opposite directions, major defect is: produce the flash overlap, not only need to increase " side cut " and " shaping " two stations, and additional waste material, one mould crosspointer has strengthened equipment and frock, has increased operation easier, when mould generation axial compressive force was irregular, the functional distance of pin just was difficult to hold.
The object of the invention is to overcome the shortcoming in the above-mentioned technology, a kind of structure and process modifications are proposed industrial sewing machine needle and processing method thereof, can improve the quality of industrial sewing machine needle, make in sewing at a high speed, " sanding suture ", " secant ", " fuse " problem can not take place, and can enhance productivity, reduce material consumption.
The object of the invention is realized by following technical scheme:
This industrial sewing machine needle, front end at shank is needle point, syringe needle, a pin hole is arranged, on the front and back shank of pin hole present position stub is arranged, along axis is relative long wire casing arranged, be connected by the transition awl between shank and the needle handle with stub, one clamping plane is arranged on the needle handle, two side shapes that it is characterized in that the long wire casing on the shank are α in an angle, and side and intersection, bottom surface and side and periphery intersection are circular arc, and side and bottom surface are smooth, smooth, roughness is the Ra0.2 micron.
Angle α between two sides of long wire casing is 38 °-40 °.Two sides and intersection, bottom surface and side and periphery intersection are circular arc, and arc radius R is the 0.05-0.07 millimeter.
Because surface ratio was Paint Gloss originally, between side and the bottom surface arc transition is arranged, in guiding feeded thread process, frictional resistance reduces, therefore the harmful heat that produces also reduces, and the problem of " sanding suture ", " secant " " fuse " can not take place in sewing at a high speed.
The processing method of this industrial sewing machine needle is by following working procedure processing:
The bar → cut of selecting materials → forge grinds → rolls quarter → cold stamping → shaping → heat treatment → electric heating and roll directly → jump eye → polishing → straight → rubbing down → polish → electroplate.
The core of processing method of the present invention is " elder generation's forging bar, rear pressure slot ".The processing of long wire casing, stub and pin hole is to adopt self-control four station cold stamping lathe punch process, once finishes.This method can not produce flash " overlap ", needn't assist to add " side cut " and " overlap shaping " two extra processing steps, helps device miniaturization and frock and oversimplifies, and helps saving equipment investment and saves material.Have in the cold stamping process, have only a pin in the mould, take the mould of " a mould single needle ", make the functional distance of pin be easy to grasp, mould is easy to make, because length is shorter, easy operating has good adaptability for home made materials.On punched hole processing method, the present invention has adopted special-purpose standardization shaped steel as the punching patrix, as long as grind stamping-out sword face, needn't take whether meet hole shape into account, can repeatedly use continuously.Repairing on the method for hole, adopting chamfered edge processing rubbing down.
Advantage of the present invention is owing to adopted new processing method, has substituted machining by punch process, and shank surface texture fiber is not damaged, and has improved the fracture strength and the bending resistance of shank; The wire casing surface roughness is by R
a3.2 micron is brought up to R
a0.2 micron, notch and groove root all are little circular arc; The pinholed surface roughness is by R
a3.2 micron is brought up to R
a1.6 micron, upper and lower orifice edge is eased arris, and radius of curvature is the 0.05-0.07 millimeter; In guiding pipeline process, frictional resistance reduces, and therefore the harmful heat that produces also reduces, can not take place " sanding suture ", " secant ", " fuse " problem, can satisfy the requirement that high speed is sewed.New processing method is compared with external processing method, and economical with materials is about 30%, compares with domestic original old technology, and production efficiency improves more than 5 times.
Embodiment of accompanying drawings:
Fig. 1 is a kind of industrial sewing machine needle structure chart,
Fig. 2 is the A-A profile,
Fig. 3 has long wire casing partial section view,
Fig. 4 is the bad figure of the pin after the industrial sewing machine needle cold forging operation,
Fig. 5 is that eedle is cut the pin base figure after the grinder preface is cut mill,
Fig. 6 is an industrial sewing machine needle through rolling the sign that rolls quarter after carving operation and pin number,
Fig. 7 is the pin base figure after the cold stamping operation,
Fig. 8 is the pin base figure after trimming processing,
Fig. 9 is the syringe needle part structure chart after trimming, rubbing down operation,
This industrial sewing machine needle, be on the shank (4) of needle point (1), syringe needle (2), pin hole (3), pin hole (3) one ends stub (9) to be arranged at the front end of shank (4), on the shank (4) of pin hole (3) other end long wire casing (5) is arranged, be connected by the transition awl (6) that has tapering between shank (4) and the needle handle (7), needle handle (7) go up with stub with simultaneously be the needle handle plane (10) of flat shape, end face is needle handle end (8), two of long wire casing side shapes α in an angle on the shank, the size of α is in 38 ° of-40 ° of scopes; Two sides of long wire casing and intersection, bottom surface and two sides and arc surface intersection are arc transition, and arc radius R is the 0.05-0.07 millimeter, and side and bottom surface are smooth smooth, and roughness is 0.2 micron.Because the improvement of this series structure, shape, sewing thread frictional resistance in long wire casing reduces, and is suitable for sewing at a high speed.
Its processing method is as follows:
1, selects materials: select G by its purposes
Cr15 or the T9A bright steel wire be raw material, steel wire diameter meets the normal diameter of eedle handle.
2, cold forging: adopt XD type straightening cold forging machine, be used to the transition awl of forging the bar reducing and forging pin simultaneously.Pin base total length is L; Forging stock length is L
1The raw material diameter is D, and the shank diameter is d, and transition awl length is L
2
3, cut mill: adopt QM type cutting machine, be used to cut contracting through part and reserving the upper surplus of cold stamping operation of shank front end when forging bar, grind needle handle tail cone Y, L
3For cutting the true length that the grinder preface trims the back pin, be cut-out.
4, roll quarter: adopt the GK type to roll the machine at quarter, be used to scribe product type and sign, product marking (11) and pin number (12) are arranged on needle handle.
5, cold stamping: adopt the special-purpose four station cold stamping lathes of self-control, be used to suppress pin elongated slot (5), stub (9) and punching (3), repair hole (3), that the pin hole outside occurs because punching is expanded during indent and is given prominence to (13) will to add man-hour at " rubbing down " worn.
6, shaping: adopt ZM type trimmer, because the upper surplus of excision cold-stamped shank front end, also to grind the needle point first sharp angle B simultaneously be 34 ° ± 3 ° to the dilation of outer both sides, hole during worn punching, and the needle point first sharp angle length is l
5, be that second sharp angle α reservation allowance d is the 0.2-0.3 millimeter, grind paracone second sharp angle by the rubbing down operation, length is l
4, stub front end to distance between two tips is K.
7, heat treatment---quench: adopt the heating of self-control high temperature box type resistance furnace, but mode is an oil cooling, and heating-up temperature is 840 ℃, and cooling velocity is 150 C/S.
8, electric heating rolls directly: adopt DZ type electric heating to roll straight machine, the tempering after being used to quench is also rolled straight, and the heating-up temperature of workpiece is 300-350 ℃, the time to being 15 seconds.
9, jump eye: adopting vertical jumping eye machine, be used for the light decorations processing of pin hole inwall, is carrier with the plain bar that is slightly less than pinhole width.Penetrate pin hole and be arranged in rows, be coated with, be hung on and jump on the eye machine frame, make spasmodic motion, such with the cutter trade and the burr of worn pin hole inwall with the running of lathe with grinding agent.
10, polishing: adopt the special-purpose polishing machine of self-control, the coarse vestige of remover wire surface is modified in the surperficial polishing that is used for whole pin.
11, straight: as to adopt manually-operated, promptly on metal plate, use the phenolic resins hammer, strike the looper that directly in process, is caused with artificial method.
12, rubbing down: adopt PM type polishing and burnishing machine, be used for the last arrangement processing of eedle, this process is logical one group and comprises that finishing wheel and blanket wheel etc. unite processing and realize that another effect of this operation is second sharp angle that grinds needle point.
13, polish: adopt MZ type Plane surface grinding machine, be used to grind the clamping plane on the needle handle; The clamping of having plane is arranged in the eedle series and do not have two kinds on clamping plane.
14, electroplate: adopt the special-purpose barrel plating machine of self-control, coated metal is Cr, and thickness of coating is not less than 3 microns, has surperficial corrosion protection and decorates double-deck function.
15, packing: the Plastic box package that adopts 200 dresses.
Claims (6)
1, a kind of industrial sewing machine needle, front end at shank is needle point, syringe needle, a pin hole is arranged, on the front and back shank of pin hole present position stub is arranged, along axis is relative long wire casing arranged, be connected by the transition awl between shank and the needle handle with stub, one clamping plane is arranged on the needle handle, two side shapes that it is characterized in that the long wire casing on the shank are α in an angle, and side and bottom surface are intersected outer and side and periphery intersection are circular arc, and side and bottom surface are smooth, smooth, roughness is the Ra0.2 micron.
2,, it is characterized in that the angle α between two sides of long wire casing is 38 °-40 ° according to the described industrial sewing machine needle of claim 1.
3, according to the described industrial sewing machine needle of claim 1, it is characterized in that the side of long wire casing and intersection, bottom surface and side and periphery intersection are circular arc, arc radius R is the 0.05-0.07 millimeter.
4, a kind of processing method of industrial sewing machine needle is characterized in that it being by following working procedure processing:
The bar → cut of selecting materials → forge grinds → rolls quarter → cold stamping → shaping → heat treatment → electric heating and roll directly → jump eye → polishing → straight → rubbing down → polish → electroplate.
5, according to the processing method of the described industrial sewing machine needle of claim 4, the processing that it is characterized in that long wire casing, stub and pin hole is to adopt four station cold stamping lathe punch process, once finishes.
6,, it is characterized in that in the cold stamping process having only a pin in the mould according to the processing method of claim 4 or 5 described industrial sewing machine needles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121012A CN1049263C (en) | 1997-11-13 | 1997-11-13 | Industrial sewing machine needle and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97121012A CN1049263C (en) | 1997-11-13 | 1997-11-13 | Industrial sewing machine needle and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1181431A CN1181431A (en) | 1998-05-13 |
| CN1049263C true CN1049263C (en) | 2000-02-09 |
Family
ID=5176136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97121012A Expired - Fee Related CN1049263C (en) | 1997-11-13 | 1997-11-13 | Industrial sewing machine needle and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049263C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402225C (en) * | 2005-12-05 | 2008-07-16 | 秦策 | Steel wire needle back lack milling-free processing method for straight-bar machines |
| CN102794645A (en) * | 2011-05-26 | 2012-11-28 | 李景珠 | Numerical control pinhole machining device |
| CN104109951A (en) * | 2013-04-18 | 2014-10-22 | 江西禾丰电子机械有限公司 | Double-row embroidery machine |
| CN111958311B (en) * | 2020-08-19 | 2022-06-03 | 重庆市鹏宇五金制品有限责任公司 | Processing and cooling device for needle blank of sewing machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217096A (en) * | 1988-07-06 | 1990-01-22 | Sanei Kinzoku Kogyo Kk | Belled needle and its manufacture |
| JPH08299653A (en) * | 1995-05-12 | 1996-11-19 | Organ Needle Co Ltd | Needle |
-
1997
- 1997-11-13 CN CN97121012A patent/CN1049263C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217096A (en) * | 1988-07-06 | 1990-01-22 | Sanei Kinzoku Kogyo Kk | Belled needle and its manufacture |
| JPH08299653A (en) * | 1995-05-12 | 1996-11-19 | Organ Needle Co Ltd | Needle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1181431A (en) | 1998-05-13 |
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