Sewing machine base

With the continuous improvement of living standards, people's requirements for food, clothing, housing, and transportation are also increasing. Sewing machines, as an industry closely related to clothing, are also constantly facing new challenges.

As one of the main structures of the sewing machine, the base not only bears the fixed function of supporting the entire sewing machine on the workbench but also connects many important parts. therefore, if the structural strength or fatigue resistance of the base is insufficient, it will not only affect the quality and life of the product but also threaten the personal safety of workers.

In this paper, strength and vibration analysis of the sewing machine base is carried out by combining relevant three-dimensional design software with practice to verify whether the strength meets the design and application requirements.

Force analysis of base

The three-dimensional model of the machine is built by relevant three-dimensional design software, and the specific stress is shown in Figure 2. As the support part of the whole machine, the base is supported by the platform to the four flat corners of the base, and also by the weight of the head and other parts. Almost all parts are centered on gravity within the four flat corners of the base, so the ∑M of the head and other parts of the base are ignored. Since the structure of each mechanism has not been changed by this model, the original dynamic balance of each mechanism has not been broken, so the dynamics of each mechanism are not analyzed in this paper.

Suppose 

The total gravity of each part of the machine is ∑ G

∑ G=G1+G2+…+Gn

In equation:

∑ G is the total gravity to which parts of the machine are subjected;

G1 is the gravity to which part 1 is subjected;

G2 is the gravity to which part 2 is subjected;

...

Gn is the gravity to which part n is subjected;

In addition, the support force to the base

From the support of the deck to the four flat corners,

And:

∑ G=f1+f2+f3+f4

F1, f2, F3, and F4 are support forces with four flat corners.