Method for manufacturing and mounting assembled cylinder cap spray pipe and specific bending tool

Abstract

The invention relates to a method for manufacturing and mounting a spray water pipe of an assembled type cylinder cover and a special bending tool. A straight spray water pipe is subjected to quench annealing treatment; the treated spray water pipe is arranged in a hole which is positioned on the cylinder body and is vertically intersected with a water inlet hole; the spray water pipe is fixed through flanges on the end of the spray water pipe by a cone in front of a plug and the conical surface of the hole; the spray water pipe is bent along a circular groove on the outer walls of exhaust ports through the special bending tool which is arranged on the cylinder cover body and is used as a sand cleaning hole, so that an outlet on the other end of the spray water pipe is opposite to a gutter waterway between two exhaust ports on the cylinder cover body; and a hole which is positioned on the fixed end of the spray water pipe, is coaxial with the water inlet hole on the cylinder cover body and has the same size as the water inlet hole is drilled through. The spray water pipe has the advantages that the spray water pipe is processed and mounted by a machining method so that the spray water pipe has accurate position and good water flow effect. The mounted spray water pipe is easy to reach 100 percent of finished product rate, thoroughly avoids waste products caused by embedding thespray water through casting, and can generate huge economic benefit for the cylinder cover with high value.

Description

technical field [0001] The invention relates to components of internal combustion engines, in particular cylinder heads. Background technique [0002] At present, most high-power internal combustion engines use a cylinder head for one cylinder. There are two intake valves on the cylinder head to control the intake of the intake port and two exhaust valves to control the exhaust of the exhaust port. When the internal combustion engine is working, the cylinder head has to withstand the high temperature and high pressure when the gas explodes. Therefore, the design of the cylinder head must fully consider the mechanical stress and thermal stress it bears, and it must be equipped with a suitable cooling system to minimize the cylinder head. The temperature, especially the temperature between the two exhaust port walls at the two exhaust valves, is also the place where the thermal stress of the entire cylinder head is the highest, requiring cooling water to first reach the water ...

AI Technical Summary

Problems solved by technology

In actual production, it is found that the reject rate of this production process is high. The reasons are: 1. The molding sand that blocks the spray pipe is easy to drill into the molten iron when the high-temperature molten iron is poured, blocking or partially blocking the spray pipe, and it is difficult to clean the sand and it is not easy to check. ; 2. The location of the water spray pipe has low casting accuracy, resulting in poor intersection between the water inlet pipe and the water spray pipe of the cylinder head during machining; 3. Casting defects are prone to occur at the joint between the steel water spray pipe and the outer wall of the cylinder head during casting

The first two phenomena cause the water spray pipe to flow poorly, and the third phenomenon causes the leakage of the cooling water of the cylinder head, which is not allowed for the cylinder head

In order to solve the above problems, higher technological measures and cost input are required during casting, and it is also difficult to achieve 100% finished products

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