What determines the machining accuracy of ceramic components
It is of great significance to ensure and improve the machining precision of ceramic components in nc machine tools by proper use of methods and techniques in the programming of ceramic components.
So what determines the machining accuracy of ceramic components?
The machining accuracy of ceramic module is determined by the position detection element, which is composed of the detection element (sensor) and signal processing device, and is an important part of the closed-loop servo system of CNC machine tool for ceramic module.
Its function is to detect the actual value of the position and speed of the worktable, and send feedback signal to the numerical control device or servo device, thus forming a closed loop control.
The detection element generally USES the principle of light or magnetism to complete the detection of position or velocity.
The position detecting element is divided into direct measuring element and indirect measuring element according to the detecting method.
Linear detection element is generally used in linear motion measurement of ceramic assembly machine tools, which is called direct measurement, and the position closed-loop control constituted by it is called full closed-loop control.
The measurement precision of the ceramic component is mainly determined by the precision of the measuring element and is not affected by the transmission precision of the machine tool.
Due to ceramic components of the machine table with the drive motor rotation Angle precision linear displacement ratio of relationship, so can use the driver motor or ball screw rotation Angle method of indirectly measuring workbench mobile distance, this method is called indirect measurement, posed by the location of the closed-loop control is called the half closed loop control.
The machining precision of ceramic components depends on the precision of the measuring element and the feed chain of the machine tool.
The machining accuracy of ceramic components in closed-loop NC machine tools is largely determined by the accuracy of position detection devices. CNC machine tools for ceramic components have very strict requirements on position detection components, and their resolution is usually between 0.001 -- 0.01mm or less.
The probability of failure detection components compared with the NUMERICAL control device is still relatively high, often report cable damage, component fouling, collision and deformation phenomenon.
If it is suspected that the fault of the detection component should first check whether there is cable broken, dirt, deformation, etc., you can also measure its output to determine the quality of the detection component, which requires that you must master the working principle of the detection component and output signal.
Here are some examples of what to do when, for example, a device is failing to detect mechanical oscillations (acceleration/deceleration).
1) Failure of pulse encoder.
At this point, check whether the voltage of the feedback line terminal on the speed unit drops at certain points. If any drop indicates that the pulse encoder is defective, the encoder should be replaced.
2) The cross coupling of the pulse encoder may be damaged, causing the shaft speed to be out of sync with the detected speed, so the coupling should be replaced.