NEWS Center

27

2022

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05

The production method of imported gaskets

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【Summary description】Imported gaskets are installed between the relative mating surfaces of the cylinder block and cylinder head used in internal combustion engines such as motorcycles, automobiles, industrial machinery, and outboard engines to seal the gaskets between these mating surfaces. Now, let's learn about the production method of imported gaskets together!

Imported gaskets are installed between the relative mating surfaces of the cylinder block and cylinder head used in internal combustion engines such as motorcycles, automobiles, industrial machinery, and outboard engines to seal the gaskets between these mating surfaces. Now, let's learn about the production method of imported gaskets together!

 

The production method of imported gaskets

 

The imported gasket, as a laminated gasket, is a technology that reduces the thickness of the plate according to the required sealing performance to suppress the deformation of the cylinder head and cylinder hole. That is, by setting the total plate thickness of the gasket at the circumference of the combustion chamber hole to be thick, this is a part of the plate thickness set at the circumference of the combustion chamber hole, designed under high load, and in order to not apply excessive surface pressure to the adjacent circumference of the combustion chamber (chamber), the roundness of the cylinder bore is also disclosed in patent document 1. By also changing the total plate thickness in a circumferential direction at the circumference of the combustion chamber cavity, and then on the convex strip part on its outer side, Furthermore, the outer parts are designed to be thinner to improve sealing performance, adjust the surface pressure around the cylinder bore, prevent deformation of the cylinder head, and ensure the roundness of the cylinder bore.

In order to obtain the target surface pressure by changing the total plate thickness around the combustion chamber hole, it is necessary to try to calculate the thickness of the imported gasket. However, due to repeated adjustment operations, the design efficiency is poor. In addition, due to forging processing, the thickness of the secondary plate may change partially, but the small thickness difference of the secondary plate can have a significant impact on the surface pressure, so sufficient mold accuracy is required. In addition, in the gaskets used in multi cylinder engines, due to the increase in processing area based on the number of cylinders and the need for a larger load, there are production equipment limitations and processing difficulties.

The present invention is completed in view of these issues and can ensure the roundness of the cylinder hole to prevent deformation of the cylinder head. Its purpose is to provide a metal gas shell that can stabilize the surface pressure at the periphery of the combustion chamber hole, improve the sealing pressure, and easily set the target surface pressure

In order to solve the above problem, the imported gasket in the technical solution of the present invention has a pair of substrates, sub plates, and backing plates, which are arranged in layers with each other; The secondary boards are stacked between the pair of substrates; The board is located between the substrate and the sub board, and a pair of substrates are provided with combustion chamber holes at the opening, and a convex part is arranged to surround the combustion chamber hole. In the case where the flat part far from the combustion chamber hole side sandwiched with the convex part is referred to as the second flat part, the board is at least layered on the flat part of the board and the forming position of the convex part, and is stacked around the combustion chamber hole of the substrate; The flat part on the side of the combustion chamber hole where the convex part is sandwiched is called the flat part, and a second convex part is arranged along the circumference of the combustion chamber hole. The second convex part is layered on the flat part of the secondary plate, bending the secondary plate in the direction of plate thickness and plastic deformation is achieved through the load in the direction of plate thickness.

The imported gasket has a pair of base plates, sub plates, and plates; The pair of substrates is equipped with combustion chamber holes at the opening, and a convex strip part is arranged in a manner that surrounds the combustion chamber holes, and is stacked around the combustion chamber holes of the substrate; The flat part on the side of the combustion chamber hole where the convex part is sandwiched is called the flat part, and is arranged in layers with each other; The secondary boards are stacked between the pair of substrates; The board is located between the substrate and the sub board, and the board is at least layered on the flat part of the board and the position where the convex part is formed. A second convex part is arranged along the circumferential direction of the combustion chamber hole, and the flat part far from the combustion chamber hole side clamped by the convex part is called the second flat part. In the case where the second convex part is layered on the flat part of the sub board, the sub board is bent towards the thickness direction, And plastic deformation occurs through the load in the thickness direction of the plate.

A bolt hole is formed on the imported gasket substrate for fastening bolts, and the second convex part is not formed near the bolt hole, but only at a position far from the bolt hole, forming two or more second convex parts.

The imported pad is formed by stacking at least multiple sheets of the pad on the flat part, resulting in a thicker total plate thickness. The total plate thickness of the substrate, the thickness of the secondary plate, and the total plate thickness of the pad are formed at the position of the flat part.

The imported gasket provides a gasket that can more reliably equalize the surface pressure of the thickened part. Due to deformation based on the size of the tightening load, when the tightening load is large, the height of the gasket decreases, and the surface pressure around the tightened combustion chamber hole 1 becomes uniform.

The above introduction is about the production method of imported gaskets. If you want to learn more, please feel free to contact us at any time!