Ball screw axial measurement and analysis

Ball screw axial measurement and analysis of 2020 - 10 - 03 ball screw is widely used, including aircraft control surfaces, landing gear transmission mechanism, precision machine tools, automobile steering and many other applications. As the most commonly used transmission parts, the performance of the ball screw play a key role in the quality of mechanical components. In order to prevent the ball screw and ball nut and the related parts performance problems after assembly, the ball screw axial detection is very important. Traditional contourgraph detection method has many limitations, faced with enormous challenges. Ball screw challenge a typical analysis, how to accurately determine the contact point of ball screw in a typical ball screw assembly, steel ball how to come into contact with the double circular arc pointed arch on the contour, and the accurate position of the contact point is the most critical problem. If the control is not good, will lead to produce interference phenomenon after final assembly. Taylor hopson Form Talysurf® PGI罗福斯和计量4。 0 software can quickly determine the key issues. Using spiral Angle correction function can shorten the measurement time spiral Angle correction capability allows along the axial spiral profile measurement and Angle transformation, so that it is expressed as perpendicular to the spiral Angle of the measured results. Can measurement to simulate the parts of axis is perpendicular to the spiral of the measurement results with the analysis of the double circular arc pointed arch Metrology 4. 0 software automatic positioning steel ball with double circular arc measured profile, the contact point can show the accurate position of the steel ball contact, can also determine the parameters such as pitch, radius and PCD. From analysis of two axial measurement of pitch, double circular pointed arch, PCD challenge, how to accurately find is thread? In order to accurately measure the shape of the screw thread, ball screw must be accurate alignment and measurement axis, measuring needle won't measure along the desired path, cause the measuring error. Traditional contourgraph without flat cylinder is found on the ball screw will encounter difficulties. Taylor hopson Form Talysurf® PGI罗福斯和计量4。 0 software can help customers easily realize parts alignment. Alignment method 1: use the part on both ends of the shaft alignment by automatic alignment procedure and high precision Y worktable, vertex positions at the ends of the rotary table to determine the ball screw, and turn them into the correct Angle, make the parts and measurement of shaft alignment. Alignment method 2: use Metrology. 4. 0 to align through Metrology 4 PCS. 0 software to create new part coordinate system ( PCS) Can precisely control PGI NOVUS measure the movement and the position of the tip of the needle, moved to pinpoint accurately thread on very small contact area. Again through the part coordinate system itself ( 个人电脑) To create new origin and shaft based on the design to complete alignment. Three challenges, how to accurately two-way measurement? In order to fully characterize PCD and other parameters, both sides need to ball screw and the measurement, the two sides of relative relationship is the key to influence the performance of ball screw. The outline of the traditional instrument can't solve the problem. 形成表面光度仪® PGI NOVUS has two-way measurement function, can be done in the process of a measuring ball screw on the surface of the upper and lower measurement. Taylor hopson standard support forward calibration, reverse calibration range calibration and unique tip to tip. The latter can make the tip is located in the vertex of the parts, to ensure accurate measurement of diameter. Measuring diameter, needle point should be located in parts of the vertices. 计量4。 0 software can automatic sliding parts, to ensure that meet this requirement. User-defined template Metrology analysis 4. 0 software provides the user defined analysis template, can be used as part of the analysis procedure is applied to the measurement automatically. The analysis parameters can be displayed according to the demands of users. Templates can be saved after repeated use, you can also set a pass/reject criteria, to display the parts whether meet the tolerance requirements. Include surface roughness, shape, double circular pointed arch analysis, pitch, PCD and tolerance of outline template ( Source: British Taylor hopson)