SU1703948A1 - Micrometer - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control the diameters of the end grooves. The purpose of the invention is to improve the measurement accuracy. At the ends of the bracket 1, quilts are placed, one of which is connected to the micrometer head. The pins are located perpendicular to the plane of the bracket 1, the measuring tips 9 and the latches of the longitudinal and angular position. The working part of the angular position lock has an ellipse profile in cross section. The tips 9 are interchangeable and may have a different profile of the working part. 7 il.

Description

The invention relates to a measurement technique and can be used to control the diameters of the end grooves.

The aim of the invention is to improve the measurement accuracy.

FIG. 1 schematically depicts a micrometer during measurement; in fig. 2 - the same. view from above; Fig. 3A-A in FIG. one; in fig. 4 shows a section BB in FIG. 2; in fig. 5 shows a section B-B in FIG. 3; in fig. 6 is a view of FIG. four; in fig. 7 is a micrometer measuring circuit with special tips.

The micrometer contains a bracket 1 with tongs 2 and 3 of square shape (Fig. 1). Pins 4 and 5 (fig. 2) are coaxially mounted in sub-frames 2 and 3 and, in addition, are made at an angle to the plane of symmetry of the bracket 1 (the most optimal angle of 45 °) blind bore holes for cylindrical crackers 6 (fig. 4) . Borings for quill 4 and 5 are made in the corresponding nuts 6. At the working ends of quilts 4 and 5, their axes and perpendicular to the symmetry plane of the bracket 1 are made of rectangular windows,

which by means of the washer 7 and nut 8 secured the lateral measuring tips 9 from the set of standard plane-parallel end gauges (Fig. 3 and 5). For measuring end grooves of different profile, lateral measuring tips 9 perform a corresponding profile (for example, in Fig. 7). Clamps 10 of the longitudinal position, made in the form of hollow screws, are screwed into the crackers 6, the holes of which include the clamps 11 of the angular position t by the head and the working section having an elliptical cross section. The latches 11 are located in the windows of the respective quill holes 4 and 5 (Fig. 5), and their fastening is carried out with screws 12 (Fig. 6). For convenience of moving the pintles 4, when adjusted to a predetermined size, there is a thread on its end, on which the handle 13 is screwed. The microhead of the micrometer includes a micro screw 14, a stem 15, a drum 16 and a ratchet 17 (see Fig. 3). The stalk 15 is pressed into the brace 3 staples 1. The drum 16 is installed on the stalk 15 s

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rotatable and has a recess which covers the shoulder of the stem 15. On the drum 16 there is a circular scale with divisions of hundredths of a millimeter, and on the stem 15 there is a risk to read them, Pinot 5 has a scale with divisions of whole millimeters, and Receiver 3 - risk to count them. A microscrew 14 is attached to the drum 16 by means of a ratchet 17, connected to the linol 5 by means of a collet threaded sleeve 18, pressed into the pinoli 5.

At the ends of the quilts 4 and 5, internal undercuts are made coaxially and extend into rectangular windows under the lateral measuring tips 9 for adjusting the micrometer to the standard.

Micrometer works as follows.

Pre-adjust the micrometer by the standard, enter it into the recesses of the pinolel 4 and 5 until it touches the gauge with the tips 9. The quill 4 is secured with the cracker 6, screwing the retainer 10 into it, Insert the micrometer with the measuring tips 9 measured: groove. By turning the drum 16, the measuring tips 9 are brought into contact with the surface to be measured. At the same time, the microscrew 14 through the collet threaded sleeve 18 moves the quill 5 with the measuring tip 9. The clamp 11 quill 5, interacting with its longitudinal diametrically opposed windows, provides strictly straight

linear translational movement of quill 5 without rotation. After the ratchet has triggered, the quill 5 is fixed by means of the cracker 6 and the clamp 10. In case of wear of the clamp 11, the screws 12 are released and it is turned so that the gap between the quill window 5 and the working section of the clamp 11 is reduced.

The micrometer allows to measure the outer and inner diameters of the annular end grooves in the parts, to the center of which there is no access, as well as through the use of special tips - the average diameters of the end grooves of different profiles.

Claims (1)

Formula from finding a micrometer containing a bracket, two pintles fixed at the ends of the bracket, located in a pinhole x perpendicular to the plane of the bracket, corresponding measuring tips with two working surfaces and fixers of the angular and longitudinal position of the corresponding quills. characterized in that. In order to improve the accuracy of measurement, longitudinal windows are made in the pins to accommodate the corresponding angular position fixtures, the latter have the shape of an ellipse in cross section, and the micrometer is equipped with mechanisms for adjusting the position of the corresponding angular position fixtures and fixed in the bracket and . I YS- / ////// sTs / l ( to r ti uЈ 5 jx am lllaUi ": iH 2 SP te si € H with t about co QQQ I "Q "About 5 View g Fie Fy