High-precision rapid match-grinding method for overlap amount of hydraulic matching parts for excavator
A technology with high overlap and high precision, which is applied in the direction of grinding machines, grinding/polishing equipment, metal processing equipment, etc., can solve the problems of complex processing, repetitive work and low efficiency in the matching grinding process, and achieve high-efficiency matching processing Effect
Active Publication Date: 2017-05-10
FLIGHT AUTOMATIC CONTROL RES INST
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Problems solved by technology
The pneumatic or hydraulic measurement method comprehensively considers the influence of the actual shape of the valve port (radial clearance and rounded corners, etc.) It is difficult to meet the low-cost and short-cycle concept of civilian products
The conventional indirect measurement method needs to repeat the cycle of measurement-processing, and there are many repetitive tasks in the grinding process, the processing process is complicated, the cost is high, and the cycle is long
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[0031] The invention discloses a method for quickly matching and grinding the overlap amount of high-precision hydraulic coupling parts for excavators. A universal tool microscope is used to measure and measure the size of the square holes of the first group and the second group of valve sleeves and the gap between the two groups of square holes. The distance dimension, combined with the theoretical dimension A of the end face of the valve core 7 from the throttle edge 3, and the overlap amount index X, calculate the grinding size of each throttle edge of the valve core. Then use the self-developed Studer S20-2 precision universal cylindrical grinder equipped with Movomatic online measurement system to carry out the precision matching of the overlap.
[0032] The following takes a certain type of excavator hydraulic coupling as an example. The hydraulic coupling requires an overlap amount of 0.01mm, and the theoretical dimension of the valve core end face from the first set of thr...
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The invention discloses a high-precision rapid match-grinding method for overlap amount of hydraulic matching parts for an excavator. The high-precision rapid match-grinding method comprises the following steps of: utilizing a universal tool microscope to separately measure dimensions of two groups of square holes and distance dimensions among the square holes, and calculating a match-grinding dimension of each metering edge of a valve element by combining the dimensions of the square holes and the distance dimensions among the square holes with a theoretical dimension A from the end surface 7 of the valve element to the metering edge 3 and an overlap amount index X; and utilizing a self-developed Studt S20-2 precision universal grinding machine equipped with a Movomatic online measuring system to display a practical dimension of the grinded metering edge in real time, and performing precision match-grinding processing on overlap amount. The method effectively guarantees symmetry and synchronization performance of the hydraulic matching parts, realizes low-cost high-efficiency match-grinding for overlap amount of the hydraulic matching parts, and meets requirements, on cost and period, of engineering mechanical parts.
Description
Technical field [0001] The invention belongs to the precision grinding and processing technology of hydraulic parts of excavators, and in particular relates to a method for quickly grinding the overlap of high-precision hydraulic coupling parts for excavators. Background technique [0002] In the excavator's electronically controlled servo control system, the direct drive servo valve is the key component that connects the electrical and hydraulic parts of the system, and the precision machining of the overlap of the servo valve hydraulic coupling is one of the difficulties and key points in its manufacture. At present, the commonly used methods of overlapping amount of grinding include pneumatic measurement method, hydraulic comprehensive measurement method and indirect measurement method. Pneumatic or hydraulic measurement method comprehensively considers the influence of the actual shape of the valve port (radial clearance and fillet, etc.) on the amount of overlap, the measure...
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IPC IPC(8): B24B25/00
CPCB24B25/00
Inventor 徐瑞杨强强王文汉
Owner FLIGHT AUTOMATIC CONTROL RES INST