A processing method for the seam of a cylinder block

Abstract

The invention discloses a method for processing a stop mouth of an air cylinder body. The method comprises the following steps of: 1) finely milling the upper plane of the air cylinder; 2) measuring the sizes of at least three preset points at the periphery of each cylinder hole of the air cylinder body away from the preset plane to obtain each size parameter and inputting the size parameters into a numerical control platform, wherein the preset plane is parallel with the standard plane of the upper plane of the air cylinder body; 3) comparing each size parameter with the preset parameter value to obtain an offset value; 4) judging whether the offset value is in the preset offset value range, if so, turning to the step 5), and otherwise, turning to the step 2); 5) determining the plane byutilizing each size parameter and amending a processing coordinate system; and 6) under the amended processing coordinate system, processing the stop mouth of the air cylinder body according to the preset processing size. By the processing method provided by the invention, the processing precision of the stop mouth of the air cylinder body can be improved, consistency of products can be improved,processing rework rate and rejection rate are reduced, and manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a processing method for the seam of a cylinder body. Background technique [0002] The engine is a source of power for a variety of machines, providing the machines with the power they need during their work. The cylinder block is an important part of the engine. The cylinder edges of the cylinder liner in the cylinder body cooperate with each other to prevent the cylinder liner from coming off the cylinder. [0003] For ease of understanding, the relevant terms are explained as follows: [0004] Circular interpolation: It is an interpolation method that gives the interpolation digital information between the two ends, and uses this information to control the relative movement of the tool and the workpiece, so that it can process an ideal curved surface according to the specified arc. [0005] Measuring Probe: A device for measuring the coordinates of a defined point. [0...

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Problems solved by technology

[0013] However, in the above machining process, the movement distance of the tool along the axis of the cylinder hole is set in advance on the CNC platform according to the depth and diameter of the cylinder block. Therefore, when machining according to the above parameters, the machining size is Pre-set value, self-correction and compensation cannot be performed in the process of processing, especially when tool replacement is required in the batch processing process, due to the existence of tool change variation, machining errors will inevitably be caused; and even if the tool is not replaced, In the process of positioning the cylinder block, there will also be positioning errors; furthermore, due to the influence of the flatness of the plane on the cylinder block and processing debris, it is difficult to maintain the consistency of the size of the cylinder block mouth. , it can be seen that the processing method in the prior art is difficult to meet the high processing accuracy requirements of the cylinder block, so it is difficult to ensure the processing quality of the cylinder block, resulting in a high processing rework rate and scrap rate, resulting in an increase in processing costs

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