CN103103378A - Worm for upper and lower shaft transmission of sewing machine and manufacturing method thereof - Google Patents
Worm for upper and lower shaft transmission of sewing machine and manufacturing method thereof Download PDFInfo
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- CN103103378A CN103103378A CN2012104502845A CN201210450284A CN103103378A CN 103103378 A CN103103378 A CN 103103378A CN 2012104502845 A CN2012104502845 A CN 2012104502845A CN 201210450284 A CN201210450284 A CN 201210450284A CN 103103378 A CN103103378 A CN 103103378A
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- worm screw
- lower shaft
- shaft drive
- sewing machine
- zinc alloy
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Abstract
The invention provides a worm for upper and lower shaft transmission of a sewing machine. The worm is made of zinc alloy, wherein the zinc alloy comprises the following components in percentage by weight: 3.90%-4.30% of aluminum, 0.03%-0.06% of magnesium, 0.20%-0.50% of copper, not more than 0.035% of iron, not more than 0.004% of lead, not more than 0.003% of cadmium and not more than 0.001% of tin, and the balance being zinc. The invention further provides a manufacturing method of the worm. The worm provided by the invention is convenient to machine and operate, less in processes, capable of improving the production efficiency, easy for realization of mechanization and automation, stable in quality and low in cost.
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 and use worm screw and preparation method thereof.
Background technology
The worm screw that the upper and lower shaft drive of Domestic multi-function sewing machine is used is the strength member that forms sewing machine.Choosing of worm screw material commonly used, mainly intensity, rigidity, wear resistance and the anufacturability according to axle determines, makes every effort to economical rationality.Worm screw shaft parts material commonly used has 35,45,50 highquality carbon steels, is most widely used with 45 steel.For being subjected to the also general carbon steels such as available Q235, Q255 of the less or not too important axle of load.But this steel endless screw adopts self-acting lathe turning to form more, and the method need be through reaching 20 road manufacturing procedures, and tooling cost is high, and quality is unstable.
Also there is the die casting of employing mode to replace method for turning in prior art.As Chinese patent application (publication number: the manufacture method that CN1323669A) relates to drive worm for sewing machine, the method is that stock is placed in the pressure die-casting machine central position, form with die casting again, wherein mould is mainly to be combined by at least three fan pattern pieces, and module has respectively two smooth junctions, stands in advance on junction and is provided with embeded slot, another junction is provided with chimeric, each module combines, then in the center, the worm screw die cavity is set, then each chimeric is scabbled; During die casting, be with the powerful impact extrusion stock in each module level synchronous closing ground, make stock be shaped to worm, multiple level is again moved back mould, pickup, and the long position excision is got final product to get worm screw.Although the method is produced the higher drive worm for sewing machine of precision by the method for die casting, adopt the sort of material to make drive worm for sewing machine but provide, the material that adopts steady quality, cost to hang down easy die casting is made transmission and is remained problem demanding prompt solution with worm screw.
Summary of the invention
The present invention is directed to the existing the problems referred to above of existing technology, proposed a kind of operation few, be convenient to produce in enormous quantities, and steady quality, the upper and lower shaft drive of sewing machine that cost is low are used worm screw.
the invention provides on a kind of sewing machine, worm screw is used in lower shaft drive, this worm screw forms by the die casting one, it is upper coarse and lower fine cylindric that described worm screw bottom is, worm screw top is cylindric and offers outside screw in the worm screw outer surface of upper, offer three equally distributed through holes on the outer side wall of worm screw upper end, have the cavity that connects in worm screw top and worm screw bottom and offer in the worm screw upper end opening that communicates with cavity, 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%, and magnesium 0.032%, copper 0.245%, iron 0.009%, 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%, and magnesium 0.052%, copper 0.245%, iron 0.025%, 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%, and magnesium 0.04%, copper 0.45%, iron 0.005%, plumbous 0.0012%, cadmium 0.001%, tin 0.0002%,, all the other are zinc.
Another object of the present invention is to provide the preparation method of 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 is melted, obtain zinc alloy metal liquid;
S2, above-mentioned molten metal is carried out punching press die casting, obtain the upper and lower shaft drive of the machine of threading worm screw blank;
S3, above-mentioned blank is carried out aftertreatment obtain the smooth upper and lower shaft drive of the machine of threading of spiral face and use 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.
With in the preparation method of worm screw, described temperature of fusion is 310-330 ℃ in the upper and lower shaft drive of above-mentioned sewing machine.Further preferred, described temperature of fusion is 314 ℃.
The zinc alloy that obtains in the temperature of fusion scope 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 was too high, irony crucible and the reaction of zinc liquid were accelerated, and the oxidizing reaction of crucible surface generation iron generates Fe
2O
3Also can generate FeZn with the reaction of zinc liquid Deng oxide compound chelating element
13Compound (cadmia) is dissolved in zinc liquid.Aluminium, magnesium elements are accelerated scaling loss burning speed, and the 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, the reaction of zinc and iron is accelerated, and can form the grit of iron-Al intermetallic, makes the upper and lower shaft drive of the machine of threading worm screw surface overwear vt..The corresponding increase of fuel consumption simultaneously.Temperature is higher, and the thick mechanical property that causes of foundry goods crystallization reduces.When temperature of fusion was too low, alloy flowability was poor, was unfavorable for being shaped, and affected the die casting surface quality.
With in the preparation method of worm screw, described cast temperature is room temperature in the upper and lower shaft drive of above-mentioned sewing machine, and pressure is 95-105Mpa.Further preferred, described die casting pressure is 99Mpa.
With in the preparation method of worm screw, described aftertreatment is the mechanical workout operations such as tapping, fraising in the upper and lower shaft drive of above-mentioned sewing machine.
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, does not inhale iron when the low easy die cast of zinc alloy fusing point and fusing and die casting, do not corrode die mould, sticking to mould, do not 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 be easy to realize mechanize and automatization; Punching press can process upper and lower axle worm screw accurately, steady quality, and cost is low.
Description of drawings:
Fig. 1: the upper and lower shaft drive of sewing machine of the present invention worm screw sectional view;
Fig. 2: the upper and lower shaft drive of sewing machine of the present invention worm structure schematic diagram.
In figure, 1, outside screw; 2, through hole; 3, cavity.
Embodiment
The below uses embodiment the present invention is described in further detail, 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 forms by the one-body molded manufacturing of die casting with worm screw, it is upper coarse and lower fine cylindric that concrete structure is that the worm screw bottom is, worm screw top is cylindric and offers outside screw 1 in the worm screw outer surface of upper, offer three equally distributed through holes 2 on the outer side wall of worm screw upper end, have the cavity 3 that connects in worm screw top and worm screw bottom and offer in the worm screw upper end opening that communicates with cavity 3.
Table 1: the embodiment 1-3 composition (weight percent) of the upper and lower shaft drive of machine with the worm screw zinc alloy of threading
Embodiment 1
The zinc alloy of moiety such as table 1 embodiment 1 is dropped into smelting furnace, be warming up to 310 ℃ in atmosphere zinc alloy is fused into molten metal.Under room temperature, be that 95Mpa casts the upper and lower shaft drive of the machine of threading worm screw blank with metal hydraulic at pressure.Then blank is carried out tapping, reams into the smooth finished product of spiral face.
Embodiment 2
The zinc alloy of moiety such as table 1 embodiment 2 is dropped into smelting furnace, be warming up to 325 ℃ in atmosphere zinc alloy is fused into molten metal.Under room temperature, be that 103Mpa casts the upper and lower shaft drive of the machine of threading worm screw blank with metal hydraulic at pressure.Then blank is carried out tapping, reams into the smooth finished product of spiral face.
Embodiment 3
The zinc alloy of moiety such as table 1 embodiment 3 is dropped into smelting furnace, be warming up to 314 ℃ in atmosphere zinc alloy is fused into molten metal.Under room temperature, be that 99Mpa casts the upper and lower shaft drive of the machine of threading worm screw blank with metal hydraulic at pressure.Then blank is carried out tapping, reams into the smooth finished product of 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.
The upper and lower shaft drive of the machine of threading that embodiment 1-3 and comparative example 1 are made compares with worm screw, and comparative result is as shown in table 2.
Table 2: the upper and lower shaft drive of the machine of threading that embodiment 1-3 and comparative example 1 are made with the worm screw effect relatively
As can be seen from Table 2, the excellent in durability of the worm screw for preparing with material of the present invention.And can carry out die cast, 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 modifications or replenish or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (10)
1. on a sewing machine, worm screw is used in lower shaft drive, this worm screw forms by the die casting one, it is upper coarse and lower fine cylindric that described worm screw bottom is, worm screw top is cylindric and offers outside screw in the worm screw outer surface of upper, offer three equally distributed through holes on the outer side wall of worm screw upper end, have the cavity that connects in worm screw top and worm screw bottom and offer in the worm screw upper end opening that communicates with cavity, the material of described worm screw is zinc alloy, described zinc alloy is grouped into by the one-tenth of following weight percent: aluminium 3.90-4.30%, 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.
2. worm screw is used in the upper and lower shaft drive of sewing machine according to claim 1, 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. worm screw is used in the upper and lower shaft drive of sewing machine according to claim 1, 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. worm screw is used in the upper and lower shaft drive of sewing machine according to claim 1, 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%, lead 0.0012%, cadmium 0.001%, tin 0.0002%,, all the other are zinc.
5. the preparation method of the upper and lower shaft drive use of a sewing machine worm screw, is characterized in that, the method comprises the following steps:
S1, zinc alloy is melted, obtain zinc alloy metal liquid;
S2, above-mentioned molten metal is carried out punching press die casting, obtain the upper and lower shaft drive of the machine of threading worm screw blank;
S3, above-mentioned blank is carried out aftertreatment obtain the smooth upper and lower shaft drive of the machine of threading of spiral face and use 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.
6. the upper and lower shaft drive of sewing machine according to claim 5 with the preparation method of worm screw, is characterized in that, described temperature of fusion is 310-330 ℃.
7. the upper and lower shaft drive of sewing machine according to claim 6 with the preparation method of worm screw, is characterized in that, described temperature of fusion is 314 ℃.
8. according to claim 5-7 upper and lower shaft drive of the described sewing machine of any one with the preparation method of worm screw, is characterized in that, described cast temperature is room temperature, and pressure is 95-105Mpa.
9. the upper and lower shaft drive of sewing machine according to claim 8 with the preparation method of worm screw, is characterized in that, described die casting pressure is 99Mpa.
10. the upper and lower shaft drive of sewing machine according to claim 5 with the 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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| CN103103378A true CN103103378A (en) | 2013-05-15 |
| CN103103378B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667791A (en) * | 2013-11-26 | 2014-03-26 | 宁波瑞铭机械有限公司 | Presser foot fixer of sewing machine and preparation method thereof |
| CN103695713A (en) * | 2013-11-26 | 2014-04-02 | 宁波瑞铭机械有限公司 | Presser foot of sewing machine and preparation method thereof |
| CN103710574A (en) * | 2013-09-29 | 2014-04-09 | 宁波瑞铭机械有限公司 | Sewing machine worm and manufacturing 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 |
-
2012
- 2012-11-04 CN CN201210450284.5A patent/CN103103378B/en not_active Expired - Fee Related
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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710574A (en) * | 2013-09-29 | 2014-04-09 | 宁波瑞铭机械有限公司 | Sewing machine worm and manufacturing method thereof |
| 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 |
| CN103667791A (en) * | 2013-11-26 | 2014-03-26 | 宁波瑞铭机械有限公司 | Presser foot fixer of sewing machine and preparation method thereof |
| CN103695713A (en) * | 2013-11-26 | 2014-04-02 | 宁波瑞铭机械有限公司 | Presser foot of sewing machine 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 |
| 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 |
| 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 |
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| CN103103378B (en) | 2015-08-05 |
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