Introduzzjoni għal l- Għodda Mikroskopju Kejl Metodu għal Esterni Ħjut
1. Imaging method. First, use a focal rod to adjust the focal length of the microscope, install the measured thread, select the aperture according to the aperture table, then tilt the column at the helix angle, and then move the microscope and the measuring piece so that the measured tooth profile enters the field of view. By adjusting the tooth profile to make it clear on the axial plane, various parameters can be measured. These parameters include pitch, pitch, helix angle, etc.
1) Medju dijametru kejl: Press the bit-tikek linja at the center of the meter line in the field of view of the eyepiece against the image of the adjusted thread profile, record the horizontal reading, and move the column of the microscope along the horizontal stroke so that the the bit-tikek... linja iċ-ċentru ta' il- metru linja fi iċ-ċentru ta' il- metru linja il- il- għajn huwa ippressat kontra l- immaġni ta 'oħra ħajt profil oppost il ħajt dijametru. The worktable cannot move longitudinally, and read the horizontal secondary reading. The difference between the two readings is the thread medium diameter value. To eliminate the error caused by the axis of the threaded component not perpendicular to the guide rail during installation, the average value can be measured on the other side for Kalkolu.
2) Pitch measurement: Tilt the microscope column by a thread angle, so that the bit bit line at the center of the micrometer line on the microscope eyepiece is pressed against the contour image of the thread profile. Record the vertical coordinate reading, then move the worktable and read the vertical coordinate the contract the coordinate . To eliminat systematic errors caused by non parallelism between the thread axis and measurement method, the left and right tooth profiles are read once each during measurement and the average value is taken.
3) Screw angle measurement: The installation method for threads is the same same like before. The contour of the meter line and the thread tooth in the eyepiece is pressed by the optical gap method, and the angle is directly read out in the angle eyepiece. When measur, the angle eyepiece. When measuring, the left and right teeth should be measured, and the two sides of the thread axis should also be measured. Imbagħad, il alġebrajku somma ta' il tnejn nofs angoli mkejla fuq il oppost l-istess eljali wiċċ jista' be meħud biex jiksbu l-nofs angolu valuri ta' il imkejla xellug u lemin spirali forom.
2. Axial cutting method (measuring knife method). The axial cutting method is to measure with a measuring tool on the axis plane of the defined cross-section of the thread. Its measurement values can accurately reflect the actual geometric dimensions of the thread gauge. When measuring the geometric parameters of threads using the axial cutting method, the first step is to use a measuring tool. As the microscope is an optical instrument, the imaging at the center of its field of view is better than at the edge, so a measuring tool with a 0.3mm groove on the cutting edge is used. However, for larger pitch, due to the influence of the helix angle, the 0.3mm groove can be covered by the helix surface, so only a measuring tool with a 0.9mm groove can be used to meet the requirements. Generally, a measuring tool with a distance of 0.3mm measures a thread of approximately {{10}}.53mm, while a measuring tool with a distance of 0.9 mill marks measures a thread of approximately 3.6mm pitch.
