Turning clamp for plate part hole and inner annular groove machining

Abstract

The invention discloses a turning clamp for plate part hole and inner annular groove machining. The turning clamp comprises a clamp body. A clamp installation groove is formed in the clamp body. The clamp installation groove comprises an X-axis positioning reference plane, a Y-axis positioning reference plane and a Z-axis positioning reference plane. The four corners of the X-axis positioning reference plane are provided with interference receding grooves. The two sides of the upper portion of the X-axis positioning reference plane are each provided with a pressing block body and provided with compressing bolts. A pressing block boss is arranged at the tail end of each pressing block body. A lateral abutting bolt hole is formed in the side face of the clamp body. A lathe installation shaft is arranged on the back face of the clamp body. Due to the fact that the special clamp is adopted for machining holes and inner annular grooves of plate parts, the clamping efficiency of parts to be machined is improved, the productivity is increased by about 50%, strict positioning precision control is achieved, the part machining precision requirement is ensured, the yield of the machined parts reaches 100%, and the clamp material and manufacturing costs are saved by about 70%.

Description

technical field [0001] The invention relates to a special fixture for mechanical processing, in particular to a turning fixture for upper holes and inner ring grooves of plate parts. Background technique [0002] Plate parts with holes and inner ring grooves are common parts for turning processing. The processing difficulties of this part mainly include: [0003] (1) The shape and position accuracy of the hole design is relatively high, and the positioning accuracy of the hole can reach 6 tolerances, and the processing requirements are relatively high. At present, the four-claw fixture parts are generally used, and the accuracy is not high, resulting in a low pass rate of the parts. The pass rate is only About 60%; [0004] (2) The existence of the inner annular groove makes it difficult for the tool to enter the cutting, and the processing method is limited, especially the milling process is difficult to realize; [0005] (3) The part is generally a square piece. The four...

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Problems solved by technology

[0003] (1) The shape and position accuracy of the hole design is relatively high, and the positioning accuracy of the hole can reach 6 tolerances, and the processing requirements are relatively high. At present, the four-claw fixture parts are generally used, and the accuracy is not high, resulting in a low pass rate of the parts. The pass rate is only About 60%;

[0004] (2) The existence of the inner annular groove makes it difficult for the tool to enter the cutting, and the processing method is limited, especially the milling process is difficult to realize;

[0005] (3) The part is generally a square piece. The four-jaw fixture (soft jaw) currently used in turning processing has low positioning and clamping accuracy;

[0006] (4) The size of the square structure of the part after milling is inconsistent, so when each part is clamped, it is necessary to use a dial gauge to find out its reference plane and determine the center of the hole to be processed. At present, the use of four-claw fixtures requires repeated trial installations , a lot of time is wasted, the time for clamping and alignment accounts for about 50% of the total processing time, the productivity is very low, it is a waste of time, and it is easy to cause the position tolerance of the hole to be out of tolerance

Especially in mass production, when turning such parts, the processing efficiency is very low and the scrap rate is high;

[0007] (5) The manufacture of the currently commonly used four-claw fixture requires specific materials with low hardness, and the material purchase cost is relatively high. At the same time, the manufacture of four-claw fixtures requires machining, welding and other processing procedures, and the process content is more

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