SU1399010A1 - Method of producing jig plates - Google Patents

Abstract

The invention relates to the field of mass production and can be used in the manufacture of parts with precisely spaced holes, in particular in the manufacture of plates for equipping machine tools of the machining center type. The aim of the invention is to improve the manufacturing accuracy of the coordinate grid of holes in the conductor plate. Holes 2 are drilled in the plate and offset from its nominal position in the coordinate grid by the value K determined by the formula K V / jx where i) X and d y - displacement values at the corresponding coordinates. At least two rotary bushings are installed in the holes, the holes 5 and 6 of which are eccentric to their outer surface. The magnitude of the eccentricities of the sleeves is determined by the formula J e, + jej K (e, -, iy,) + (e - Le), where Je, and le, are the tolerances on the values of the eccentricities of the first and second sleeves, respectively; e, and e - the magnitudes of the eccentricities of these sleeves. After installation, the sleeves are rotated to the calculated angles and fixed. Fixing sleeves can be made by pressing, gluing, soldering. The angles of rotation of the sleeves are determined by the formula arctg (4y // jx) -arctg (e, + К -2) / 2eiK; o (2 arccos (e, e -KV / 2e, e, where o1, and df- angles of rotation the first and second sleeves; 4x yy, the axis of the hole from the nominal position along the corresponding coordinates; e, and e - the eccentricities of the first and second sleeves; K - the size of the hole offset in the plate. 2 ill. i (L with

Description

The invention relates to mechanical engineering and can be used in the manufacture of parts having thin holes, in particular, in the manufacture of plates for equipping machine tools of the machining center type.

The purpose of the invention is to improve the accuracy of manufacturing the grid of holes in the conductor plate.

Figure 1 shows the holes in the conductor plate with installed bushings, a general view; figure 2 - section aa in Fig.I.

The plate I has a hole 2 in which the sleeves 3 and 4 are installed with holes 5 and 6. The outer diameter of the sleeve 3 is equal to the diameter of the hole 2, the outer diameter of the sleeve 4 is equal to the diameter of the hole of the sleeve 3. The diameter of the hole 6 of the sleeve 4 is equal to the specified Hole 5 and 6 are shifted relative to the axes of symmetry of sleeves 3 and 4 by ei and e, respectively. Hole 2 is offset from its nominal position by the value of K, which corresponds to the displacements along the selected axes and /) y, and the value of K is determined by the ratio

V

+ Lou

on the other hand, based on the condition of collection, the value of K is related to the values of e and e correlated ye, le, K (e - ae,) +

sse - de,)

where le and de are tolerances on the value of eccentricities

 one

and e.

These ratios are determined by

nominal values e

12

e, and K permissible deviations of these quantities.

The method of obtaining the mesh of holes includes the following steps:

- drilling holes with a diameter equal to the outer diameter of the sleeve 3, offset from the nominal position by an amount K;

production of sleeves 3 and 4 with holes 5 and 6;

- measurement of e values

e and K with

required accuracy;

- installation of the sleeves 3 and 4, respectively, in from) wool 2 and 5 so that the common axes of the outer surfaces and openings of the sleeves 3 and 4 coincide with

the selected direction of the grid axis;

- rotation of the sleeve 3 at an angle c /, and sleeves 4 at an angle (Y, which are defined by

180 ° - arctg - o (,

arccos

e

to -

di arccos

+ 2 e, K

eU e - to 2e, e

- fixing the sleeves, which can be made by pressing, gluing, soldering, etc.

To measure the values of e ,, e, / x and / charger, install bushings and rotate them while determining the angles of rotation o, and c, modern SPU machines can be used.

The method allows to automate the process and more fully utilize the capabilities of modern SPU systems. The accuracy of the holes depends only on the accuracy of the measurements. So, for example, when the offset of the holes in the plate is 0.31 0.2 mm, the values of the eccentricities of the holes in the sleeves are 0.3 ± 0.2 mm, the measurement accuracy is within ± 0.001 mm, the rotation angles are 11 °, the offset of the axes of the holes the second bushings from the nominal location is ± 0.01 mm. If the angles of rotation of the sleeves are determined with an accuracy of ± 0.5, the displacement of the axes will be no more than 0.008 mm.

0

s

0

five

Claims (1)

Invention Formula A method of manufacturing a conductor plate in which holes are drilled in the conductor plate in accordance with the coordinate grid of the holes to be drilled and at least two rotatable guide bushings with eccentric holes are installed in them and, by turning them, change the distance between the drilled axes holes, characterized in that, in order to increase the accuracy, the holes in the conductor plate are displaced from their nominal position in the coordinate grid by the amount K yut by the formula K - Vux -f ay, where 4 X and yy are the displacements along the corresponding coordinates. 3 and the rotary guide sleeves are taken with eccentricity values e and e, which are determined by the formula e, + J e K i (e ,,) -i + (e 2 - d e-,), where both e and ye are tolerances eccentricities of sleeves, four turning about formula t sleeves o, 180 ° - arctg - arccos e to - e. 2 e, K agssosis  2yo 7 Aa 4 j / / / / fpuffZ