Variable-diameter boring cutter for cylinder expansion of automobile engine

Abstract

The invention relates to the field of automobile part machining, in particular to a variable-diameter boring cutter for cylinder expansion of an automobile engine. The variable-diameter boring cuttercomprises a cutter handle, two sliding blocks, two cutter bits, two groups of locking mechanisms and two groups of diameter expansion adjusting mechanisms, the cutter handle is of a cylindrical structure which is arranged in a vertical state, the two sliding blocks are symmetrically and slidably arranged at the top of the cutter handle, the two cutter bits are fixedly arranged on one sides of theouter ends of the two sliding blocks respectively, the two locking mechanisms and the two diameter expansion adjusting mechanisms are symmetrically arranged in the inner part of the tool handle, one locking mechanism corresponds to one diameter expansion adjusting mechanism, two transverse penetrating holes are symmetrically formed in the tool handle, and each sliding block is connected with the corresponding locking mechanism. According to the variable-diameter boring cutter for cylinder expansion of the automobile engine, the rotary motion of a push block which is provided with scale needlesis converted into the linear translational motion, an annular dial is assisted to visually indicate the translational amount, so that the diameter expansion radius adjustment amount of the boring cutter is more accurate, and when the two scale needles are consistent, the two cutter heads are in a symmetrical state, so that the cylinder expansion quality is effectively ensured.

Description

technical field [0001] The invention relates to the field of automobile parts processing, in particular to a variable-diameter boring tool for cylinder expansion of automobile engines. Background technique [0002] An internal combustion engine is a reciprocating piston engine. The biggest difference between this type of engine and an external combustion engine is that its fuel is burned inside. There are many types of internal combustion engines, and common gasoline engines and diesel engines are typical internal combustion engines. The engine displacement is the sum of the working volume of each cylinder of the engine, generally expressed in liters (L). The working volume of the cylinder refers to the gas volume swept by the piston from the top dead center to the bottom dead center, also known as the single cylinder displacement, which depends on the cylinder diameter and piston stroke. Engine displacement is a very important engine parameter. It can represent the size o...

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Problems solved by technology

[0003] In the car modification culture, the most direct way to increase power is to increase the displacement of the engine by expanding the cylinder. Generally, in the cylinder expansion process, although the expansion radius of the traditional boring tool can be adjusted, the adjustment method is full-screen manual. Visual inspection may easily lead to the asymmetry of the cutter heads at both ends with respect to the axis of the tool handle, which will affect the quality of cylinder expansion. Therefore, it is necessary to design a boring tool structure that can accurately and symmetrically adjust the radius of reaming.

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