SU880589A1 - Worm spinner - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used for strengthening by means of surface plastic deformation of the working profiles of cylindrical gear parts, for example gear wheels with an involute tooth profile.

The worm wheel is known / which represents a cylindrical single or multiple-runner worm, in which part of the turns is cut along the surface of a single-cavity hyperboloid of rotation, and at the intersection of the cut surface with the surface of the wormwire there is a reinforcing spiral i-belt.

The specified roll-in prevents the internal gears from being machined. meshing.

Closest to the present invention, there is a screw-in wheel for machining gears, having a working surface consisting of turns of a full profile and cut turns with cut surfaces forming a spiral-helix reinforcement ribbon 2.

The disadvantage of this roll-in is the possibility of processing:

wheels only external gearing, which limits the effectiveness of its use.

The purpose of the invention is to enable machining of internal gears.

The goal is achieved by the fact that a worm gear for machining gears, having a working surface consisting of turns of a full profile and cut turns with cut surfaces forming a spiral-helix reinforcing ribbon, turns are involute

15 with a profile in the profiling section, and the tops of the turns of the full profile in this section are located along an arc of a circle, with the center of the grinding wheel located on the line connecting the center of the wheel to be machined with the pole of engagement.

The drawing shows a schematic of the proposed breaker.

Roller 1 consists of coils 2 full profile and cut coils 3,

25 plane. 4. In the profiling section, the coils are made with an involute profile, their vertices are located along an arc of a circle 5.j

The profiles of its turns are located in

Claims (2)

30 profiling section along the arc of a circle. This section may be axial, normal, or any other type of elevation line. Its position is fully and unambiguously determined by such an independent design parameter of the worm wheel as the setting angle. ;. If 2 O, the profiling section is the axial section of the worm wheel, and in the process of strengthening, the rotation of the part and the tool intersect at a right angle. If C, where C is the angle of elevation of the turn of the worm gear, the main section is the section normal to the turn, and in the process of strengthening the axis of rotation of the workpiece and the tool intersect at an angle less than the right angle C. The magnitude of the angle 1 is determined when designing the screw-in trimmer on the basis of specific machining conditions. The tool is obtained as follows. The internal gear gear 6 is in proper engagement with the external gear gear. The ring gear frac- tion is the manufacturing circuit of the proposed tool. When the contour rotates around the tool (its rotation around the tool axis and moving by an amount multiple of the contour pitch for one revolution around the tool axis), the initial tool surface of the screw wheel of the construction in the form of a checker, for example, involute, on the ellipsoidal surface of rotation. when the radius R); dividing the circumference of the producing contour equal to the radius RJ, its rotation E around the tool axis will be a special case of the original tool surface - the screw surface on the spheres. When the involute gears of the internal and external gearing line engage, the rotating line is rotating. around the tool axis, we will obtain a rotational surface intersecting with the turns of the original screw along a spiral-helix line. This line intersects the plane of the drawing at certain points, for example at point 6, etc. And is the guide of the spiral-screw reinforcing ribbon 7. Flax point 7 has a width H and a slaughter angle, the values of which are determined experimentally depending on the material of the workpiece. and tool, as well as other processing conditions. The cut of the turns of the initial worm is carried out along the surface of rotation of the line 5 around the tool axis, with the cut surface equidistant to the surface of rotation of the machine tool line around the tool axis. In machine gearing, the worm gear 1 rotates with an angular speed (jUp g matched with speed d) l, the rotation of the gear wheel 6, thereby strengthening it. When hardening the spur gears, the center 1C of the crown of the worm gear should be aligned with the line connecting the center of the part and the pole P of the machine gear. The tool of the described design can process gears of both internal and external gear with equal success. The use of the tool will make it possible to strengthen the working profiles of cylindrical internal gears by surface plastic deformation, thereby improving their quality. An inventive screwdriver for machining gears, i.e. a working surface consisting of full profile turns and cut turns with cut surfaces forming a spiral-helix reinforcement ribbon, characterized in that in order to enable the internal gears to work , the coils are made with an elolvent profile in the profiling section, and the tops of the coils of the full profile in this section are located along an arc of a circle, with the center of the rolling mill located on the line connecting Machining center wheel with a pole engaging. Sources of information taken into account in the examination 1. USSR author's certificate for application No. 2712561 / 25-27, cl. 21 N 5/02, 15.01.79. 2. USSR author's certificate for application number 2614826 / 25-27, cl. 21 N 5/02, 15.05.78 (prototype).