CN103103378B - The upper and lower shaft drive of a kind of sewing machine is with worm screw and preparation method thereof - Google Patents
The upper and lower shaft drive of a kind of sewing machine is with worm screw and preparation method thereof Download PDFInfo
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- CN103103378B CN103103378B CN201210450284.5A CN201210450284A CN103103378B CN 103103378 B CN103103378 B CN 103103378B CN 201210450284 A CN201210450284 A CN 201210450284A CN 103103378 B CN103103378 B CN 103103378B
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- worm screw
- lower shaft
- shaft drive
- sewing machine
- zinc alloy
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Abstract
The invention provides the upper and lower shaft drive of a kind of sewing machine with worm screw, the material of described worm screw is zinc alloy, count by weight percentage, described zinc alloy comprises following component: aluminium 3.90-4.30%, magnesium 0.03-0.06%, copper 0.20-0.50%, iron is not more than 0.035%, and lead is not more than 0.004%, and cadmium is not more than 0.003%, tin is not more than 0.001%, and all the other are zinc.Present invention also offers the preparation method of this worm screw.Worm screw process operation provided by the invention is convenient, and operation is few, can enhance productivity, and is easy to realize mechanize and automatization, steady quality, and cost is low.
Description
Technical field
The invention belongs to field of mechanical technique, relate to the upper and lower shaft drive of a kind of sewing machine with worm screw and preparation method thereof.
Background technology
The worm screw of the upper and lower shaft drive of Domestic multi-function sewing machine is the strength member of composition sewing machine.Choosing of conventional worm screw material, mainly determines according to the intensity of axle, rigidity, wear resistance and anufacturability, makes every effort to economical rationality.Conventional worm screw shaft parts material has 35,45,50 highquality carbon steels, is most widely used with 45 steel.Also the general carbon steels such as Q235, Q255 can be used for the axle less or not too important by load.But this steel endless screw many employings self-acting lathe turning forms, the method need through reaching 20 road manufacturing procedures, and tooling cost is high, and quality is unstable.
Also have in prior art and adopt die casting mode to replace method for turning.As Chinese patent application (publication number: CN1323669A) relates to the manufacture method of drive worm for sewing machine, the method is that stock is placed in pressure die-casting machine central position, form with die casting again, wherein mould is mainly formed by least three pieces of fan block combiner, and module has two smooth junctions respectively, and junction is equipped with embeded slot in advance, another junction is provided with chimeric bar, each module combines, then arranges worm screw die cavity in center, then is scabbled by each chimeric bar; During die casting, be by the powerful impact extrusion stock in synchronous for each module level closing ground, make stock be shaped to worm, multiple level again moves back mould, pickup, and long position is excised to obtain worm screw.Although the method produces the higher drive worm for sewing machine of precision by the method for die casting, but do not provide and adopt that material to make drive worm for sewing machine, the material of employing steady quality, the low easy die casting of cost is made transmission and is remained problem demanding prompt solution with worm screw.
In prior art, steel part not only needs through multiple working procedure, and its resistivity against fire is poor, corrosion-resistant, the present invention uses zinc alloy, the low easy die cast of zinc alloy fusing point and fusing with die casting time do not inhale iron, do not corrode die mould, not sticking to mould, also have good normal temperature mechanical property and wear resistance in addition.Punch process, punch process is easy to operate, and operation is few, can enhance productivity, and is easy to realize mechanize and automatization; Punching press can process upper and lower axle worm screw accurately, and steady quality, cost is low.
Summary of the invention
The present invention is directed to the problems referred to above existing for existing technology, propose a kind of operation few, be convenient to produce in enormous quantities, and worm screw is used in the low upper and lower shaft drive of sewing machine of steady quality, cost.
The invention provides on a kind of sewing machine, lower shaft drive is with worm screw, this worm screw is integrally formed by die casting, described worm screw bottom is upper coarse and lower fine cylindric, worm screw top is cylindric and offers outside screw in worm screw outer surface of upper, worm screw upper end outer side wall offers three equally distributed through holes, in in worm screw top and worm screw bottom, there is the cavity connected and offer the opening communicated with cavity in worm screw upper end, the die-casting material of described worm screw is zinc alloy, count by weight percentage, described zinc alloy comprises following component: aluminium 3.90-4.30%, magnesium 0.03-0.06%, copper 0.20-0.50%, iron is not more than 0.035%, lead is not more than 0.004%, cadmium is not more than 0.003%, tin is not more than 0.001%, all the other are zinc.
As preferably, described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.940%, magnesium 0.032%, copper 0.245%, iron 0.009%, and plumbous 0.0032%, cadmium 0.0018%, all the other are zinc.
As preferably, described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 4.10%, magnesium 0.052%, copper 0.245%, iron 0.025%, and plumbous 0.003%, cadmium 0.0015%, tin 0.0005%, all the other are zinc.
As preferably, described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.980%, magnesium 0.04%, copper 0.45%, iron 0.005%, and plumbous 0.0012%, cadmium 0.001%, tin 0.0002%, all the other are zinc.
Another object of the present invention is the preparation method providing the upper and lower shaft drive of a kind of sewing machine with worm screw, and the method comprises the following steps:
S1, zinc alloy to be melted, obtain zinc alloy metal liquid;
S2, punching press die casting is carried out to above-mentioned molten metal, obtain the machine of threading upper and lower shaft drive worm screw blank;
S3, above-mentioned blank carried out to aftertreatment and obtain the smooth upper and lower shaft drive of machine of threading in spiral face with worm screw;
Wherein, count by weight percentage, described zinc alloy comprises following component: aluminium 3.90-4.30%, magnesium 0.03-0.06%, copper 0.20-0.50%, iron is not more than 0.035%, and lead is not more than 0.004%, cadmium is not more than 0.003%, and tin is not more than 0.001%, and all the other are zinc.
In the upper and lower shaft drive of above-mentioned sewing machine with in the preparation method of worm screw, described temperature of fusion is 310-330 DEG C.Further preferably, described temperature of fusion is 314 DEG C.
The zinc alloy obtained within the scope of the temperature of fusion of zinc alloy of the present invention can be good at being applicable to the upper and lower shaft drive of sewing machine and uses worm screw.When temperature of fusion is too high, Iron reutilization and zinc liquid react to be accelerated, and the oxidizing reaction of crucible surface generation iron generates Fe
2o
3also can react with zinc liquid Deng oxide compound chelating element and generate FeZn
13compound (cadmia), is dissolved in zinc liquid.Aluminium, magnesium elements make scaling loss burning speed accelerate, and scaling loss amount increases, and cadmia increases.In cast-iron pot, ferro element can fuse into alloy, increases the content of ferro element.Under high temperature, zinc and iron react and accelerate, and can form the grit of iron-Al intermetallic, make the overwear vt. of the machine of threading upper and lower shaft drive worm screw face.The corresponding increase of fuel consumption simultaneously.Temperature is higher, and the thick mechanical property that causes of castings crystallization reduces.When temperature of fusion is too low, alloy flowability is poor, is unfavorable for being shaped, and affects die casting surface quality.
In the upper and lower shaft drive of above-mentioned sewing machine with in the preparation method of worm screw, described cast temperature is room temperature, and pressure is 95-105Mpa.Further preferably, described die casting pressure is 99Mpa.
In the upper and lower shaft drive of above-mentioned sewing machine with in the preparation method of worm screw, described aftertreatment is the machining operation such as tapping, fraising.
Accompanying drawing illustrates:
Fig. 1: sewing machine of the present invention upper and lower shaft drive worm screw sectional view;
Fig. 2: sewing machine of the present invention upper and lower shaft drive worm structure schematic diagram.
In figure, 1, outside screw; 2, through hole; 3, cavity.
Embodiment
Apply embodiment to be below described in further detail the present invention, but the present invention is not limited to embodiment.
As depicted in figs. 1 and 2: the upper and lower shaft drive of this sewing machine is formed by the one-body molded manufacture of die casting with worm screw, that to be worm screw bottom be concrete structure is upper coarse and lower fine cylindric, worm screw top is cylindric and offers outside screw 1 in worm screw outer surface of upper, worm screw upper end outer side wall offers three equally distributed through holes 2, in worm screw top and worm screw bottom, there is the cavity 3 connected and offer the opening communicated with cavity 3 in worm screw upper end.
Table 1: embodiment 1-3 threads the composition (weight percent) of machine upper and lower shaft drive worm screw zinc alloy
Embodiment 1
Moiety is dropped into smelting furnace as the zinc alloy of table 1 embodiment 1, is warming up to 310 DEG C in an atmosphere and zinc alloy is fused into molten metal.Under room temperature, be that metal hydraulic is cast the machine of threading upper and lower shaft drive worm screw blank by 95Mpa at pressure.Then tapping carried out to blank, ream into the smooth finished product in spiral face.
Embodiment 2
Moiety is dropped into smelting furnace as the zinc alloy of table 1 embodiment 2, is warming up to 325 DEG C in an atmosphere and zinc alloy is fused into molten metal.Under room temperature, be that metal hydraulic is cast the machine of threading upper and lower shaft drive worm screw blank by 103Mpa at pressure.Then tapping carried out to blank, ream into the smooth finished product in spiral face.
Embodiment 3
Moiety is dropped into smelting furnace as the zinc alloy of table 1 embodiment 3, is warming up to 314 DEG C in an atmosphere and zinc alloy is fused into molten metal.Under room temperature, be that metal hydraulic is cast the machine of threading upper and lower shaft drive worm screw blank by 99Mpa at pressure.Then tapping carried out to blank, ream into the smooth finished product in spiral face.
Comparative example 1
Be that starting material carry out the machining preparation upper and lower shaft drive of machine of threading and use worm screw with steel.
Compare with worm screw the upper and lower shaft drive of machine of threading that embodiment 1-3 and comparative example 1 make, comparative result is as shown in table 2.
Machine of the threading upper and lower shaft drive worm screw effectiveness comparison that table 2: embodiment 1-3 and comparative example 1 are made
As can be seen from Table 2, the excellent in durability of the worm screw prepared with material of the present invention.And can die cast be carried out, processing step is few, and stability is better, and cost is low.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. on a sewing machine, lower shaft drive is with worm screw, this worm screw is integrally formed by die casting, described worm screw bottom is upper coarse and lower fine cylindric, worm screw top is cylindric and offers outside screw in worm screw outer surface of upper, worm screw upper end outer side wall offers three equally distributed through holes, in in worm screw top and worm screw bottom, there is the cavity connected and offer the opening communicated with cavity in worm screw upper end, the material of described worm screw is zinc alloy, described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.940-4.10%, magnesium 0.032-0.052%, copper 0.245-0.45%, iron is not more than 0.025%, lead is not more than 0.0032%, cadmium is not more than 0.0018%, tin is not more than 0.001%, all the other are zinc.
2. the upper and lower shaft drive of sewing machine according to claim 1 is with worm screw, it is characterized in that: described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.940%, magnesium 0.032%, copper 0.245%, iron 0.009%, plumbous 0.0032%, cadmium 0.0018%, all the other are zinc.
3. the upper and lower shaft drive of sewing machine according to claim 1 is with worm screw, it is characterized in that: described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 4.10%, magnesium 0.052%, copper 0.245%, iron 0.025%, plumbous 0.003%, cadmium 0.0015%, tin 0.0005%, all the other are zinc.
4. the upper and lower shaft drive of sewing machine according to claim 1 is with worm screw, it is characterized in that: described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.980%, magnesium 0.04%, copper 0.45%, iron 0.005%, plumbous 0.0012%, cadmium 0.001%, tin 0.0002%, all the other are zinc.
5., according to the arbitrary described sewing machine upper and lower shaft drive preparation method for worm screw of claim 1-4, it is characterized in that, the method comprises the following steps:
S1, melted by the zinc alloy described in any one of claim 1-4, obtain zinc alloy metal liquid, described temperature of fusion is 310-330 DEG C;
S2, punching press die casting is carried out to above-mentioned molten metal, obtain sewing machine upper and lower shaft drive worm screw blank;
S3, above-mentioned blank carried out to aftertreatment and obtain the upper and lower shaft drive of smooth sewing machine of spiral face and use worm screw.
6. the sewing machine according to claim 5 upper and lower shaft drive preparation method of worm screw, is characterized in that, described temperature of fusion is 314 DEG C.
7. the upper and lower shaft drive of the sewing machine according to the claim 5-6 any one preparation method of worm screw, it is characterized in that, described cast temperature is room temperature, pressure is 95-105MPa.
8. the sewing machine according to claim 7 upper and lower shaft drive preparation method of worm screw, is characterized in that, described die casting pressure is 99MPa.
9. the sewing machine according to claim 5 upper and lower shaft drive preparation method of worm screw, is characterized in that, described aftertreatment is tapping, fraising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210450284.5A CN103103378B (en) | 2012-11-04 | 2012-11-04 | The upper and lower shaft drive of a kind of sewing machine is with worm screw and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210450284.5A CN103103378B (en) | 2012-11-04 | 2012-11-04 | The upper and lower shaft drive of a kind of sewing machine is with worm screw and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103103378A CN103103378A (en) | 2013-05-15 |
| CN103103378B true CN103103378B (en) | 2015-08-05 |
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| CN201210450284.5A Expired - Fee Related CN103103378B (en) | 2012-11-04 | 2012-11-04 | The upper and lower shaft drive of a kind of sewing machine is with worm screw and preparation method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710574B (en) * | 2013-09-29 | 2016-09-07 | 宁波瑞铭机械有限公司 | A kind of use in sewing machine worm screw and preparation method thereof |
| CN103667791B (en) * | 2013-11-26 | 2016-02-03 | 宁波瑞铭机械有限公司 | A kind of sewing machine Presser foot fixer and preparation method thereof |
| CN103695713B (en) * | 2013-11-26 | 2016-01-06 | 宁波瑞铭机械有限公司 | A kind of sewing machine cloth pressing foot and preparation method thereof |
| CN105648295A (en) * | 2016-01-23 | 2016-06-08 | 中山百鸥医药科技有限公司 | Worm of particle packaging machine for processing omega-3 fish oil soft capsules |
| CN108504900A (en) * | 2018-04-27 | 2018-09-07 | 厦门格欧博新材料科技有限公司 | A kind of corrosion-resistant Environment-friendlyzinc zinc alloy |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2559666Y (en) * | 2002-07-11 | 2003-07-09 | 陈昂瑜 | Sewing machine drive axle worm manufacturing mould |
| CN102534304A (en) * | 2010-12-31 | 2012-07-04 | 北京有色金属与稀土应用研究所 | High-strength zinc-aluminum alloy bar and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2559666Y (en) * | 2002-07-11 | 2003-07-09 | 陈昂瑜 | Sewing machine drive axle worm manufacturing mould |
| CN102534304A (en) * | 2010-12-31 | 2012-07-04 | 北京有色金属与稀土应用研究所 | High-strength zinc-aluminum alloy bar and preparation method thereof |
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Granted publication date: 20150805 Termination date: 20161104 |