A method for integral spinning forming of an I-shaped silicone oil shock absorber shell

Abstract

A工-shaped silicone oil damper housing and an integral spin forming method therefor. A工-shaped silicone oil damper housing structure comprises a spoke (24) and an annular recess provided at the outer periphery of the spoke, the annular recess having a bottom plate (25), an inner cylinder (26) and an outer cylinder (27), the sectional structure of the inner cylinder (26) and the spoke (24) forming a工-shaped structure which can be of a symmetric type or an asymmetric type, the spoke (24) being provided inside the inner cylinder and not in the same plane as the bottom plate. The integral spin forming method for a工-shaped silicone oil damper housing comprises the following steps: a) blanking; b) forming a central hole by punching; c) forming a boss by shoveling and spinning; d) spin bending; e) spin flanging; and f) preparing a finished product by machine processing. The spoke of the工-shaped silicone oil damper housing is in a position which can be adjusted up and down, according to requirements，to fit to each component of an engine, such that the engine has a more compact structure; the fitting to the engine satisfies the requirements of flexible design.

Description

technical field [0001] The invention relates to a processing method of a crankshaft silicone oil shock absorber shell, in particular to an integral spinning forming method of an I-shaped silicone oil shock absorber shell and a processing method thereof. Background technique [0002] In order to reduce the torsional vibration of the crankshaft, improve the fatigue life of the crankshaft, and reduce the vibration and noise of the whole vehicle, modern automobiles will install a crankshaft torsional vibration damper at the front end of the crankshaft with the largest torsional vibration amplitude of the engine. According to the different ways of reducing torsional vibration, it can be divided into three types: dynamic type, damping type and composite type, and the crankshaft silicone oil shock absorber belongs to a kind of damping shock absorber. This silicone oil shock absorber requires good sealing and a large inertia body to ensure reliable operation and meet good use requir...

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Problems solved by technology

[0003] The spoke part of the conventional silicone oil shock absorber shell is located on the bottom plate, resulting in a relatively simple installation method, and the spokes of the shell cannot be moved after fixed installation. In addition, the traditional processing methods are generally integral casting, forging machining and tailor welding.

Integral casting is easy to produce shrinkage cavity, shrinkage porosity, etc., its mechanical properties cannot be guaranteed, and the sealing performance is difficult to meet the requirements; forging machining has low material utilization rate, large machining allowance, metal flow line is cut off, and the resistance of parts Defects such as low corrosion performance

During tailor welding, due to the uneven distribution of chemical components in the welding zone, resulting in uneven distribution of mechanical properties and poor dynamic balance of the product, its life and dynamic characteristics will be greatly affected, and various quality problems are prone to occur

For example, the publication number is CN101672340A "Silicone Oil Shock Absorber Housing and Its Manufacturing Method", although the welding process is adopted, its material utilization rate is not high, and at the same time because the bottom of the cylindrical inner tube is directly welded on the basin-shaped The middle part of the outer cylinder is prone to various welding defects due to the influence of welding defects, and the concentricity of the inner and outer cylinders is also difficult to guarantee, and its molding quality is difficult to control

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