SU697302A1 - Method of backing -off non-linear hob cutters - Google Patents

Description

(54) METHOD OF GLUING NONLINEAR CHARACTER MILLS

I

The invention relates to the field of mechanical engineering and can be used in the grinding of non-linear worm mills for cutting worm wheels.

There is a known method of cutting milling, in which the rotary movement of the cutter and the translational movement of the tool 1J are carried out.

The disadvantage of this method is the introduction of the error in the profile of the cutting edges when it registers.

The purpose of the invention is to reduce the error profile cutter with its regrind.

The goal is achieved by moving the ts direction in a tangential direction, 1 towards the cylinder coaxial with the milling cutter, the diameter of which is not less than the diameter of the mills' hollows.

FIG. 1 shows the backing pattern; .on FIG. 2 - a plan of speeds of some arbitrary point of the contact line with a radius g, which explains the formation of a posterior angle on the left side of the right-hand tooth of the milling cutter; in fig. 3 - axial and radial components of the rear angle, depending on the fall of the nape of the cam to.

The grinding wheel 1 (cm. Fig. 1), the axis of which is rotated in a horizontal plane relative to the axis of the milling cutter 2 at the screw cutting angle L, does not intermix the C along the axis of the rotating milling cutter together with the caliper eo at a speed Vc. The circle is communicating with the backing movement with speed V3. for the right side of the profile V, irvieer opposite sign.

The circumferential speed Vi (see Fig. 2) is formed as a result of the rotation of the milling cutter with an angular velocity w. From 2a, it follows that the slugging speed of s can be extended to the radial component and the tangent (in the direction of the velocity V |.

FIG. 26 shows the development of a cyanic cutter section of the cutter on the plane A-A. The vector VH, equal to the sum of the vectors V: and Ve, determines the direction of the screw thread with the elevation angle /. for uncut pots. But since the tangential component of the backing motion is summed with the vector V, the resultant motion is determined by the velocity vector jj, tangent to the formation.

the lateral surface and the components of the angle a о with the vector V. The angle etc represents the axial component of the rear angle.

FIG. Figure 2b shows a section of the BB plane, which passes at an angle X to the mill axis. In this cross section, the radial component of the velocity of the cutting out of the ultrasound g and the projection of the vector form the resulting velocity vector VSr constituting the angle eСг with the direction of the projection of the vector. Angle Xg represents the radial component of the rear angle.

: FIG. 3, curves 3 and 4 represent the axial components of the rear angle for the right and left sides of the profile, respectively, curves 5 and 6, their radial components. angle of lift on a special cylinder D 23 ° 5745. From FIG. 3 it follows that the radial component r does not exceed 5 ° / o axial, and at an angle of V 0 ° L g is zero. On non-linear mills for cutting worm wheels, this leads to a decrease in the profile error when they are refined.

In practical calculations, it is possible to determine the magnitude of the fall of the butt of the cam K for a given normal rear corner Otr by the formula.

JCtn zeinoLp

 SinXsihCAloLo)

dLt

Where

O COSOLF,

ctn - profile angle on the dividing cylinder.

For the right side there is an upper sign, for the left - the bottom one.

Gating by the proposed method can be performed only for the lateral sides of the profile, and m separately for the right and blind. The implementation of the proposed method of muting together with the previously known, for example, diagonal, is possible.

Claims (1)

Claims method of relieving non-linear worm milling machines, in which the tool rotates, characterized in that, in order to reduce the cutter profile error when it is regrind, the tool is moved in a tangential direction to the coaxially with the milling cylinder, the diameter of which is not less than the diameter of the troughs cutters. Sources of information taken into account in the examination 1. Copyright certificate № 206975, cl. B 24 V 3/02, 1966. 5 b 7 K / y / Y 2 J Figure 5