Device and method for detecting accuracy of numerical control and static pressure turntable
A detection device and accuracy detection technology, applied in the direction of measurement device, mechanical measurement device, mechanical device, etc., can solve the problems of reliability, durability and accuracy retention, and achieve simple and reliable methods, simple and reliable testing methods, Good low-speed stability
Active Publication Date: 2011-12-21
NANJING GONGDA CNC TECH
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Problems solved by technology
Compared with foreign turntables, domestic high-precision turntables have a certain gap in reliability, durability and accuracy retention.
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[0036] Below in conjunction with accompanying drawing, technical content of the present invention is described:
[0037] figure 1 It shows the structural diagram of the detection turntable, the main rail between the base 4 and the faceplate 3 adopts the constant flow hydrostatic oil supply method, and is divided into 6 oil chambers; figure 2 The hydraulic schematic diagram showing the leakage of the main rail constant flow static pressure oil chamber, the sum of the leakage and the theoretical flow of the guide rail floating is the oil intake, "leakage rate η l "is the percentage of leakage to the total oil intake, and it is a multivariate function that changes with the relative position of the faceplate base, load, oil temperature, unloading pressure, flow and other factors. For the convenience of detection, only the relationship between oil film thickness and flow is considered ;In the case of no-load, the speed of the variable-frequency motor of the multi-head pump is con...
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The invention relates to a device for detecting accuracy of a numerical control and static pressure turntable. The device comprises a leakage detecting device for a main guide rail constant-current static pressure oil chamber, a reverse clearance and mandrel clearance detecting device, and a mandrel excircle and base main guide rail installation verticality detecting device. A method for detecting the accuracy of the numerical control and static pressure turntable comprises the following steps of: a) detecting the leakage of the main guide rail constant-current static pressure oil chamber; b) detecting the reverse clearance; c) detecting the mandrel clearance; and d) detecting the mandrel excircle and base main guide rail installation verticality. The invention provides the detection device and the detection method mainly aiming at key indexes such as turntable floating amount, the reverse clearance, the mandrel clearance, the verticality and the like which influence the indexing accuracy and repositioning accuracy of the turntable. The method for detecting the accuracy of the turntable is simple and reliable, the device is convenient to operate, and the method and the device provide the basis for testing and adjusting the accuracy of the turntable. The device and the method for detecting the accuracy are also suitable for other turntables and numerical control equipment.
Description
technical field [0001] The invention relates to a precision testing device and method for a numerically controlled static pressure turntable, belonging to the technical field of machine tool testing. Background technique [0002] The 2010 major project of high-end CNC machine tools and basic manufacturing equipment listed "high-speed, precision CNC rotary table" as a key research content, and at the same time included supporting precision testing equipment as a research topic; The precision of the product is 6″, and the product manufacturing accuracy, bearing weight, service life and reliability are close to the advanced level of similar international products.” CNC static pressure turntable is an important functional part of high-end CNC machine tools, accounting for about 1 / 4 to 1 / 3 of the machine tool cost 3. Compared with foreign turntables, domestic high-precision turntables have a certain gap in reliability, durability and accuracy retention. There are many factors tha...
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IPC IPC(8): G01B5/14G01B5/245G01F1/00
Inventor 黄筱调于春建洪荣晶方成刚
Owner NANJING GONGDA CNC TECH