Process method for guaranteeing dimensional precision from air cylinder side face boss to centers of cylinder holes
A technology of dimensional accuracy and process method, applied in the direction of manufacturing tools, metal processing equipment, metal processing mechanical parts, etc., can solve the problems of side milling of the cylinder block, unstable accuracy, poor positioning accuracy, etc., to achieve stable placement posture, guaranteed The effect of dimensional accuracy
Inactive Publication Date: 2017-05-31
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology
Since the boss on the side of the cylinder block is usually arranged in front of the process, the cylinder block can only be positioned on the rough surface of the tooling, the positioning accuracy is poor, and the placement of the cylinder block is uneven, resulting in the side of the cylinder block.
Therefore, before the process of machining the side boss, it is often necessary to draw a line on the cylinder block. During the machining process, it is necessary to line up the line according to the position of the line, and the machining efficiency is low and the accuracy is not stable.
Method used
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Embodiment Construction
[0021] like Figure 1~2 As shown, a process method for ensuring the dimensional accuracy from the boss on the side of the cylinder block to the center of the cylinder bore includes the following steps:
[0022] (1) Place the cylinder block 7 on the processing base 9 with the bottom surface facing downwards and the top surface facing upwards, and insert the cylinder holes at the outermost ends on both sides of the cylinder block 7 into the threads fixed on the processing base 9 In the rod 8, the threaded rod 8 passes through the upper end of the cylinder hole;
[0023] (2) Get a positioning column 3 and insert it into the cylinder hole in the middle of the cylinder block 7, and align the positioning column 3 with the center hole of the processing base 9, and insert the center hole to fix;
[0024] (3) Insert the semicircle positioning blocks 1 fixed on the processing base 9 and correspondingly distributed in the semicircle spindle holes at both ends of the cylinder block 7 int...
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The invention discloses a process method for guaranteeing dimensional precision from an air cylinder side face boss to the centers of cylinder holes. The process method comprises the following steps that 1, an air cylinder body is placed on a machining base with the posture that the bottom face is downward and the top face is upward, and the cylinder holes in the two sides of the air cylinder body are correspondingly inserted into pressing rods; 2, a locating column is inserted into the cylinder hole in the middle of the air cylinder body and is aligned to a center hole of the machining base, and the locating column is inserted into the center hole and fixed; 3, a semicircular locating block fixed to the machining base is inserted into semicircular spindle holes in the two ends of the air cylinder body and located; 4, four auxiliary supports are fixed to the four corners of the bottom face of the air cylinder body respectively and adjusted to the same height to carry out contact supporting on the air cylinder body; 5, a screwing handle of the locating column is rotated, and a locating nail stretches out and is attached to the surface of the upper cylinder hole of the air cylinder body; 6, a clamping component matched with the pressing rod is taken and presses the air cylinder body from the top of the air cylinder body. According to the process method, the dimensional precision can be guaranteed without marking machining.
Description
technical field [0001] The invention relates to the technical field of diesel engine cylinder block processing, in particular to a process method suitable for more than three cylinders to ensure the dimensional accuracy from the boss on the side of the cylinder block to the center of the cylinder hole. [0002] technical background [0003] The cylinder block of a diesel engine is the main body of a diesel engine. It connects each cylinder and crankcase as a whole, and is a supporting framework for installing pistons, crankshafts, and other parts and accessories. The dimension from the side boss of the cylinder block to the center of the cylinder bore of the cylinder block is a very important technological dimension. Because the coordinates of the pin hole on the bottom surface of the cylinder block are based on the side boss, if the distance from the side boss to the center of the cylinder hole is out of tolerance, the coordinates of the pin hole on the bottom surface will a...
Claims
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Login to View More IPC IPC(8): B23Q3/06
CPCB23Q3/062
Inventor 覃国杰
Owner GUANGXI YUCHAI MASCH CO LTD