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Sewing machine worm and manufacturing method thereof

A sewing machine and worm technology, applied in the mechanical field, can solve the problems of poor wear resistance and corrosion resistance, low comprehensive mechanical properties, etc., and achieve the effects of long service life, inhibition of intergranular corrosion, and good corrosion resistance

Active Publication Date: 2014-04-09
如东县东广物流有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the worm used for the transmission of the upper and lower shafts of the sewing machine in this invention is easy to process and operate, the process is less, and the cost is reduced, but its comprehensive mechanical properties are relatively low, and its wear resistance and corrosion resistance are relatively poor.

Method used

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  • Sewing machine worm and manufacturing method thereof
  • Sewing machine worm and manufacturing method thereof
  • Sewing machine worm and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] According to Table 1, Example 1, the weight percentage of the worm screw for sewing machine, weigh aluminum, zinc, and copper, add them to the electric furnace, heat to 560°C and melt them all, and press magnesium into it with a bell jar. After the magnesium is completely melted, stir the alloy solution and let it stand. After 5 minutes, remove slag. Then press the rare earth cerium and lanthanum to carry out modification treatment, keep the heat preservation for 5 minutes, completely melt the rare earth cerium and lanthanum and carry out slag removal. At room temperature, under a pressure of 95 MPa, the metal is hydraulically cast into a worm blank for a sewing machine, and finally the blank is tapped and reamed to obtain a worm with a smooth spiral surface.

Embodiment 2

[0042] Weigh aluminum, zinc and copper according to Table 1, Example 2, and the weight percentage of the worm for sewing machine, add them to the electric furnace, heat to 570°C and melt them all, and press magnesium into it with a bell jar. After the magnesium is completely melted, stir the alloy solution and let it stand. After 8 minutes, remove slag. Then press the rare earth cerium and lanthanum to carry out modification treatment, keep the heat preservation for 8 minutes, completely melt the rare earth cerium and lanthanum and carry out slag removal. Under room temperature, under the pressure of 90MPa, the metal is hydraulically cast into a worm blank for sewing machines, and finally the blank is tapped and reamed to obtain a worm with a smooth spiral surface.

Embodiment 3

[0044] Weigh aluminum, zinc and copper according to Table 1, Example 3, and the percentage by weight of the worm for sewing machines, add them to the electric furnace, heat to 550°C and melt them all, and press magnesium into it with a bell jar. After the magnesium is completely melted, stir the alloy solution and let it stand. After 10 minutes, carry out slag removal. Then press the rare earth cerium and lanthanum to carry out modification treatment, keep the heat preservation for 10 minutes, completely melt the rare earth cerium and lanthanum and carry out slag removal. At room temperature, the metal is hydraulically cast into a worm blank for sewing machines at a pressure of 98 MPa, and finally the blank is tapped and reamed to obtain a worm with a smooth spiral surface.

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Abstract

The present invention relates to a sewing machine worm and a manufacturing method thereof. The material of the worm is a modified zinc alloy, wherein the modified zinc alloy comprises, by weight, 3.80-4.00% of aluminum, 0.01-0.04% of magnesium, 0.80-1.00% of copper, 0.10-0.15% of cerium, 0.05-0.15% of lanthanum, not more than 0.02% of iron, not more than 0.002% of lead, not more than 0.002% of cadmium, not more than 0.0008% of tin, and the balance of zinc. The preparation method comprises: heating and melting aluminum, zinc and copper, pressing magnesium into the obtained material, carrying out melting and slag skimming, pressing rare earth cerium and lanthanum into the obtained material to carry out a modification treatment, carrying out stamping die-casting on the metal liquid, and carrying out a post-treatment to obtain the sewing machine worm with a smooth volute surface. The sewing machine worm has comprehensive performances of good hardness, good strength, good impact property, good elongation, good abrasion resistance, good corrosion resistance and the like, and further has characteristics of long service life, simple preparation method and stable quality.

Description

technical field [0001] The invention relates to a worm and a preparation method thereof, in particular to a sewing machine worm and a preparation method thereof, belonging to the technical field of machinery. Background technique [0002] The worm for sewing machine is an important part of the sewing machine. The commonly used worm is mainly made of steel and turned by an automatic lathe. The manufacturing process is troublesome and the defect rate is high, and the cost cannot be reduced. At present, people in the industry are gradually using zinc alloy as the raw material to extrude the worm for sewing machines through die-casting to obtain a worm with better mechanical properties, wear resistance, and corrosion resistance, which is more suitable for sewing machines. [0003] Regarding the worm used for sewing machines and its preparation method, there have been reports in the prior art. For example, the Chinese invention patent (publication number: CN103103378A) relates to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C18/04
Inventor 冯光松
Owner 如东县东广物流有限公司