The function of a position detection device is to determine the displacement and speed of a moving part in the automatic drilling machine, send a feedback signal to form a closed-loop control system, and convert it into a digital signal and send it back to the CNC device for comparison with the pulse command signal, thus controlling the correct operation of drive element. The precision of position detection device determines the precision and resolution of the CNC system. Different types of CNC machines have different precision requirements on position detection elements and detection systems, and the highest moving speeds of the tested elements will also various.
The current highest level of detection component and systems is: when the highest moving speed of the tested element is 240 m/min, the resolution of the detected displacement (the minimum displacement that can be detected) can reach 1m, which can reach 0.1m at a speed of 24m/min, and the highest resolution can reach 0.01pm. Requirements of CNC drilling machine on position detection device are as follows.
1. It features a reliable operation and strong anti-interference. As the machine is provided with motor, solenoid valves and other electromagnetic induction components, as well as the lubricant and cutting fluid in cutting, the position detection device is required to feature relatively strong resistance to electromagnetic induction, and to oil and water pollution. Furthermore, the position detection device should also feature a strong adaptability to the ambient temperature due to the heat generation in the cutting process.
2. Compliance with the requirements of precision and speed
The position detection device should also reach a certain detection precision and a smaller cumulative error under the condition of satisfying the highest displacement speed of the CNC drilling machine. The precision and speed of CNC drilling machines are getting higher and higher with its development. Therefore, the position detection device is required to meet the requirements of high precision and speed of CNC drilling machines.
3. Simple installation and maintenance
The installation of a position detection device needs certain precision requirements, of which, the form and position shall be taken into consideration for convenient maintenance.
4. Lower cost and longer life
The position detection device shall also feature relatively good resistance to dust, oil mist and chips due to the impact by operating environment.
Features of CNC drilling machine:
1. It features high speed and precision, and the tapping can meet the related detection. It can run in continuously cycle at a high speed, the durable special motor can realize automatic operation, and the pitch-type tapping machine multi-spindle drill operator can run multiple machines simultaneously, saving the labor cost significantly.
2、2. Working principles Multi-spindle drill continuous cycle of forward - reverse - forward and one-way cycle of forward - reverse - stop will be operated by the specific multi-spindle drill key switch, on which, a foot switch can also be installed for automatic operation selection, such as continuous, one-way, and cycle. The machine can work completely automatically with the operator's hands away from the machine, which can be smoothly operated by a beginner.
3. High-precision tapping stroke can be adjusted simply; the automatic reversing device can freely adjust tapping stroke; the multi-head drilling, automatic drilling machine, shallow hole and perforated low-machining parts can also be easily adjusted; double safety device can prevent any damage to the screw tap, the double safety clutch is specially set on main shaft rotation, up/down and advance/retreat blades; the main shaft in multi-axis drilling movement can automatically stop; blade reverse or retracting of the multi-hole drills may damage the tool.
4. Spindle A and B will completely match main shaft under gear A and B, in which, the vertical stability, precision and precision are particularly high. The forward and backward multi-hole drills will be able to operate freely at screw tapping. Meanwhile, for excellent processed article; the multi-hole drill will cause the threads with different thickness, while for thin plates, light metal, synthetic resin and other soft products, perfect threads can also be tapped. The square adjustable shaft structure is the same as the round one.
