How to choose the right coordinate measuring machine

Source:Metro-3D Click:

[how to choose a suitable coordinate measuring machines]

With the continuous development of modern technology, the increasingly high demand for quality and accuracy. Precision testing and product quality control, new product development, process control, mold making, improve enterprise efficiency and quality means of the coordinate measuring machine is playing an irreplaceable role. How to choose an appropriate measurement system, and generate higher economic efficiency and value in use, is an important issue of concern for the majority of users. Here the coordinate measuring machine system to purchase the Notes.

Manufacturing quality objectives that will be part of the production and design requirements consistent. Establish and maintain the consistency of the manufacturing process is the most effective method is to accurately measure the workpiece size. Size information, analysis and feedback data to the production process, to make it an effective tool to continuously improve product quality. The coordinate measuring machine is one of the most effective method of measurement and the size data, because it can replace a variety of surface measuring instruments and expensive combination GAUGE, and complex measurement tasks required time is reduced from hours to minutes, and quickly and accurately evaluate the size data for the operator to provide useful information about the status of the production process.

The key is to choose a proper machine to meet the factory lasting use, the need to look at:

1. Reasonable measurement accuracy

First and foremost is the accuracy of the indicators should meet the requirements. Detection precision measuring machine according to the requirements of the workpiece selection given the relative measurement uncertainty than in the general measurement, measurement uncertainty with dimensional tolerances of the workpiece 1/3 to 1/5. Measurement requirements for precision measurement and complex-shaped bit higher with measured dimensional tolerances, 1/5 to 1/8. Is particularly important that the repeat accuracy must meet the requirements, because of the systematic errors can be compensated by a certain method, and the repeat accuracy is determined by the measuring machine itself. Good coordinate measuring system is not only to be a high precision and, more importantly, the accuracy can be maintained stable.

Measurement of complex parts, the change of the angle of the probe and the measuring rod will bring a slight error, it is recommended that the user selected accuracy (the repetitive accuracy) the high measurement system, in order to meet the future development needs of the enterprise.

2. Reasonable measurement range

The measuring range is to select the basic parameters of the measuring machine. Measuring range is selected, you should consider the following three aspects.

The desired measurement of workpieces, is not necessarily the entire workpiece. Such as the parts to be measured at the workpiece, a local, in addition to the measuring range of the measuring machine to be able to cover the measured portion, but also consider whether the entire workpiece can be placed on the machine. Select the measuring range of the measuring machine should generally be based on the size of the workpiece.

Z-axis travel Z height to the space. The Z-axis travel is the Z axis of the measuring range, and the height is the height of the workpiece can let go of the Z to the space, in addition to be considered space can be measured in the Z-axis install the probe system.

Measuring rod change issues. Some measuring head has a star-shaped probe, these probes tend to exceed the measured portion of the workpiece measurement. Usually workpiece dimension l is required to measure a range L = l +2 C, C is the length of the probe or a desired standoff. Therefore, the measuring range is equal to the maximum size of the workpiece measured plus twice the length of the probe.

3. Suitable measuring machine type

Measuring machine according to the degree of automation into the manual (or motor) and CNC (automatic) two categories. Selection should be based on the bulk of the detected object size, degree of automation, product features and frequency of use and efficiency tradeoffs.

4. 【Measurement software system

Advanced measurement systems both more specialized powerful measurement functions, and can be easy to use, easy to operate, and can meet the needs of special measurement tasks require measurement software. The choice of measurement software system elements to be considered:

● easy to operate and use (for example, the full Chinese operation interface, more convenient mode of operation).

● to meet the complex shape of the parts and the complex surface measurement.

● Graphical and flexible measurement output reporting capabilities, along with a variety of data output format.

● Automatic feature recognition.

● the offline measurement / programming function.

● virtual simulation measurement path planning and collision avoidance function.

● visual graphical analysis capabilities and best-fit evaluation capacity.

CAD functionality, can realize the automatic measurement of the CAD model.

● perfect geometric tolerance evaluation capacity.

● unknown Geometrical scanning function.

● scan three-dimensional data point cloud dynamic display, intuitive image.

● reverse engineering capabilities.

● probe dynamic configuration of the system operation and visualization.

● intelligent programming capabilities.

● Support various options device.

● special applications and support capabilities.

5. Full-featured seat measurement system

Probe holder system is an important measurement unit measuring machine. It not only directly affect the measurement accuracy, an important factor in determining the measuring machine function and measuring efficiency. Automatic and manual seat measurement system is generally based on the actual measurement requirements.

6. [Control system]

Control system is generally not of concern, but it has a very important role in the central control in the coordinate measuring system, which determines the quality of the entire system's function and movement characteristics. The data transmission can also affect the efficiency and stability of the measurement system. In addition, the control system is to support the scalability of the follow-up function is also very important.

7. Meet the requirements of measuring efficiency

The running speed and sampling speed of the measuring machine both measuring an important indicator of the efficiency, but also the performance of the machine important reference closely related to the automated production requirements. Measuring machine for the production line or flexible manufacturing line, the detection efficiency must meet the requirements of tact.

The number of collection points, determine the acceptable level of uncertainty, the work efficiency of the measuring machine. Some measuring machine can be collected within one minute more than 100 data points, and can achieve very good measurement accuracy.

In short: the measuring machine can provide a guarantee for the modern manufacturing industry, because it can be replaced by a flat-screen measurement tool, fixed or custom gauges and precision manual measurement tools. Size data for process control at the same time, the measuring machine is also available into the plant product inspection, machine tool calibration, customer quality certification, gauges, processing test and optimize the machine settings additional performance. There are many factors to consider for investment in fixed assets, but consider to improve production efficiency, reduce costs and production included control measuring machine factory quality control is the best choice.

previous：nobody
NEXT：Categorization and characteristics of probing system