Connecting rod of sewing machine and preparation method thereof

A sewing machine and connecting rod technology, which is applied to sewing machine components, needle holders for sewing machines, sewing equipment, etc., can solve the problems affecting the development of the garment industry, poor quality assurance of processing, and poor quality of sewing machine connecting rods, etc., and achieves easy mechanization and automation. , low cost and high production efficiency

Inactive Publication Date: 2014-04-02
NINGBO RUIMING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The connecting rod of the sewing machine is composed of the needle bar crankshaft, the needle bar column and the needle bar holding part. There are many processing parts, and the surface quality requirements are high, and the processing quality is not guaranteed. There are many problems in production.
At present, the quality of my country's sewing machine connecting rods is relatively poor, which not only greatly affects the economic benefits of sewing machine manufacturers, but also affects the development of my country's entire garment industry

Method used

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  • Connecting rod of sewing machine and preparation method thereof
  • Connecting rod of sewing machine and preparation method thereof
  • Connecting rod of sewing machine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the composition and mass percentage of Example 1 in Table 1, first add half of the aluminum ingot, heat it to 660°C to completely melt the aluminum ingot, then add silicon, copper and the remaining aluminum ingot, and wait until the silicon and copper are completely melted. Add nickel and zinc, adjust the temperature of the aluminum alloy liquid to 700℃, press into the magnesium flakes with a bell jar, after the magnesium is completely melted, stir the molten aluminum alloy liquid evenly, and let it stand for 5 minutes before slagging. Then, scandium is pressed into the aluminum alloy liquid, and after the scandium is completely melted, the aluminum alloy liquid is subjected to slag removal and degassing refining. After that, the processed aluminum alloy liquid is punched and die-cast under the condition of a pressure of 90 MPa to obtain needle bar crankshaft rod blanks, needle bar column blanks and needle bar holding parts blanks. Then, the needle bar crank...

Embodiment 2

[0038] According to the composition of Example 2 in Table 1 and its mass percentage, first add half of the aluminum ingot, heat to 680°C to completely melt the aluminum ingot, then add silicon, copper and the remaining aluminum ingot, and wait until the silicon and copper are completely melted. Add nickel and zinc, adjust the temperature of the aluminum alloy liquid to 710℃, press into the magnesium flakes with a bell jar, after the magnesium is completely melted, stir the molten aluminum alloy liquid evenly, and let it stand for 8 minutes before slagging. Then, scandium is pressed into the aluminum alloy liquid, and after the scandium is completely melted, the aluminum alloy liquid is subjected to slag removal and degassing refining. After that, the processed aluminum alloy liquid is subjected to press and die casting under the condition of a pressure of 88 MPa to obtain needle bar crankshaft rod blanks, needle bar column blanks and needle bar holding parts blanks. Then, the n...

Embodiment 3

[0040] According to the composition of Example 3 in Table 1 and its mass percentage, first add half of the aluminum ingot, heat it to 700°C to completely melt the aluminum ingot, then add silicon, copper and the remaining aluminum ingot, and wait until the silicon and copper are completely melted. Add nickel and zinc, adjust the temperature of the aluminum alloy liquid to 720℃, press into the magnesium flakes with a bell jar, after the magnesium is completely melted, stir the molten aluminum alloy liquid evenly, and let it stand for 10 minutes before slagging. Then, scandium is pressed into the aluminum alloy liquid, and after the scandium is completely melted, the aluminum alloy liquid is subjected to slag removal and degassing refining. After that, the processed aluminum alloy liquid was subjected to press die casting under the condition of a pressure of 86 MPa to obtain the needle bar crankshaft rod blank, the needle bar column blank and the needle bar holding part blank. Th...

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Abstract

The invention relates to a connecting rod of a sewing machine and a preparation method thereof. The connecting rod is composed of a needle stem crankshaft bar, a needle bar column and a needle bar holding part and made of an aluminum alloy, wherein the aluminum alloy comprises, by weight, 6.2 to 7.0% of Si, 1.0 to 2.5% of Cu, 0.05 to 0.15% of Fe, 0.3 to 0.4% of Mg, 0.1 to 0.2% of Mn, 0.1 to 0.5% of Ni, 0.7 to 1.0% of Zn and 0.01 to 0.025% of Sc, with the balance being Al and unavoidable impurities. The preparation method comprises the following steps: fusing the above-mentioned metals and carrying out stirring and slag removal; then carrying out stamping and die casting so as to obtain blanks of the needle stem crankshaft bar, the needle bar column and the needle bar holding part; and finally, subjecting the blanks to post-treatment and carrying out assembling to obtain the connecting rod of the sewing machine. The connecting rod of the sewing machine has good strength, hardness, plasticity, toughness, wear resistance, elongation, tensile strength, etc. and high quality.

Description

Technical field [0001] The invention relates to a sewing machine accessory and a preparation method thereof, in particular to a sewing machine connecting rod and a preparation method thereof, and belongs to the technical field of machinery. Background technique [0002] The quality of sewing machine parts directly affects the sewing quality of the garment and the performance and service life of the whole machine. The connecting rod of the sewing machine is composed of a needle bar crankshaft rod, a needle bar column and a needle bar holding part. There are many processing parts, and the surface quality requirements are high, and the processing quality is not guaranteed. There are many problems in production. At present, the quality of sewing machine connecting rods in my country is relatively poor, which not only greatly affects the economic benefits of sewing machine manufacturers, but also affects the development of the entire clothing industry in China. Therefore, improving t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06B22D18/02D05B55/14
Inventor 冯光松
Owner NINGBO RUIMING MACHINERY
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