Online measurement technology of machine tools

Anhui Haery Aviation Power Equipment Co., Ltd. mainly develops and produces piston aviation heavy oil engines. Aviation engines have very good accuracy requirements. Its processing technology has many complicated processes and requires repeated clamping and positioning. So how to make the processing accuracy? Here we have to mention the online measurement technology of CNC machine tools.

At present, by equiping CNC machine tools with various types of monitoring devices (such as probes) to monitor the processing process of workpieces, fixtures, tools, etc., it is possible to promptly alarm after finding that the workpiece is out of order, the fixture is not installed in place, tool wear, and damage, etc., and compensate or replace it, which improves the degree of automation of the machine tool, and for the product quality of the CNC machine tool during long-term work. The development of online inspection of CNC machine tools provides a set of effective methods for quality inspection of CNC machining processes.

This article uses RenishauOMPTake the 60 probe system as an example, and let me introduce the application of online detection technology. At present, the Renishaw probe commonly used in China is produced by Renishaw Company in the UK and is widely used in CNC machine tools such as CNC lathes, machining centers, CNC grinders, and special machines. Renishaw probes can be divided into workpiece detection probes and tool probes according to their functions; they can be divided into hardwire connection, induction, optical and radio according to their signal transmission methods; they can be divided into contact measurement and non-contact measurement according to their contact form.

RenishauOMP60 The hardware of the probe system consists of the probe (including probe),Water-2 The optical receiving module consists of which connects its measurement pulses toCNCThe interface integrates the system with the CNC machine tool. The normal hardware connection is shown in Figure 1.

Picture 1 RenishawOMP60 Schematic diagram of connection between probe and CNC machine tool

The cylinder line process equipment in the Haery workshop uses a relatively accurate five-axis flexible processing island imported from Germany, and the processing island is fromHORFive-axis machining center andFASTEMSThe intelligent pallet library system is composed of the machining center.OMP60The probe system corrects the positioning error of the cylinder block blank for processing quality. Figure 2 shows the cylinder block process processing equipment.

Figure 2HORFive-axis cylinder block processing equipment

Due to the large deviation of the positioning surface of the cylinder block,ShouldDuring the process, the positioning of the cylinder blank is inaccurate, causing some cylinder blanks to be unable to be processed and waste materials occur.。Using RenishauOMP60The probe system measures the position of the cylinder bore of the cylinder before processing, obtains the actual position of the cylinder bore of the cylinder bore of the cylinder bore, and automatically compensates the data to the processing program. The processing program performs rough processing based on the compensated data.。After roughly machining the cylinder bore, the fixture releases stress。The clamp clamps the workpiece, and the measuring device measures the position of the machined cylinder bore again, and compensates the data to the processing program.，The subsequent finishing content is processed based on the compensated data。After the implementation of this measure, the material waste caused by large deviation of the positioning surface of the cylinder block is solved, and the yield and equipment utilization rate are greatly improved.。Not only that, online measurement can enable operators to promptly discover problems in the workpiece and feedback them to the CNC system.。Through the application of online measurement technologies such as Renishaw probe system, the functions of the CNC system of the machine tool are fully utilized, so that the CNC system can obtain the information feedback from the detection system in a timely manner, thereby promptly correcting system errors and random errors to change the motion parameters of the machine tool, and better promote the development of integrated processing and measurement for the quality of processing and measurement.。

Haery not only uses advanced machine tool online detection technology, but also uses imported more precise measurement equipment in the precision measurement room of Haery online to measure the shape, position size and surface roughness of various components of the aircraft engine, making it the first priority in product quality. Figure 3 shows Haery Precision Measuring Room.

Title Haery Precision Measurement Room

Through the introduction of this article, I believe that everyone has a certain understanding of machine tool online measurement technology and has absolute trust in the quality of Haery products.