RU2094183C1 - Method of making curved teeth on cylindrical wheels of worm milling cutter - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: blank of a wheel and worm milling cutter are set in synchronous rotation and axial motion. In so doing, the milling cutter is moved along the tooth with the use of a master cam device. The profile of the master cam corresponds to the curvature of the arc of teeth to be cut. The front and rear cutting angles on the sides of the profile of teeth of the worm milling cutter are greater than the angle of inclination of the arc on the end face of the teeth by 3-4°. EFFECT: simplified method. 2 dwg

Description

 The invention relates to the field of heavy and medium mechanical engineering, mainly to the production of cylindrical gears with an involute profile of teeth curved along the length.

 Known methods of cutting gears with a curvilinear tooth of an involute profile, in particular arched teeth on cylindrical gears according to RF patent N 1831978, class. B 23 F 9/02, dated 09/19/89 "Method for shaping arched teeth of spur gears".

 In the known method, the formation of teeth of the involute profile along the length of the arch along an identical curve located in the plane of the line of engagement and the same height of the tooth is ensured.

 The disadvantages of this method include the fact that it requires the manufacture of a set of special cutting tools to form a convex and concave profile of the gear teeth and a similar set for the mating gear, and also requires the modernization of existing gear processing machines.

 Closest to the claimed is a method of shaping involute teeth curvilinear along the length of the tooth profile, in particular barrel-shaped teeth, implemented using mechanisms (Bushuev V.V. and Naletov S. P. Heavy gear machines. M. Mechanical Engineering, 1986, p. 87- 89, fig. 51, 52).

 In the known method, the processing of the teeth is carried out by a worm cutter on a cylindrical workpiece, which informs the agreed rotation and relative movement along the cut tooth using a copying device with a copier.

 However, the known method has disadvantages expressed in that it does not provide the formation of teeth curved along the length of the tooth, for example, arcuate, arched teeth.

 When creating the invention, the problem of increasing productivity, expanding the arsenal of methods used in the manufacture of arched gears is solved.

 The purpose of the invention is to simplify the method of forming arched teeth and, as a result, increase productivity when using worm mills and gearing machines, which are widely used in the technique for cutting cylindrical spur gears.

 The goal is achieved by the fact that in the method of shaping the teeth curved along the length of the cylindrical wheels with a worm cutter, in which the workpiece and cutter are informed of the coordinated rotation and relative movement along the tooth cut on the workpiece with the help of a copying device with a copier, the movement with the help of a copying device is reported to the cutter in tangential direction, and the front and rear cutting angles on the sides of the profile of the teeth of the cutter should be three to four degrees greater than the angle of inclination a rki at the ends of the teeth of the cut wheel, while the profile of the copier is performed in accordance with the curvature of the cut teeth.

 Distinctive features of the method are expressed in that the movement with the help of a copying device with a copier informs the milling cutter in the tangential direction, and the front and rear cutting angles on the sides of the profile of the cutter teeth should be three to four degrees greater than the angle of inclination of the arch at the ends of the teeth of the cut wheels, while the profile of the copier is performed in accordance with the curvature of the cut teeth.

 These signs have novelty, as in the known technical solutions are not identified.

 The inventive method provides the shaping of both the convex and concave side profile of the teeth curved along the length, including arched teeth, both on the wheel and on the gear using worm mills and gear processing machines.

 In FIG. 1 shows a diagram of the processing of arched teeth with a worm cutter; in FIG. 2 section tooth cutters.

The shaping of the convex and concave sides of the teeth curved along the length of the cylindrical wheel 1, FIG. 1 carry out a worm mill 2. The axis of the mill is set at an angle equal to the angle of elevation of the turns of the mill as well as when cutting spur gears. The front and rear cutting angles on the sides of the tooth profile of the cutter Ф _and (Fig. 2) are made 3-4 ^o more than the angle of inclination of the arch Ф _a (Fig. 1) at the ends of the teeth of the wheel. The workpiece of the wheel 1 and the milling cutter 2 inform consistent rotation. The cutter 2 is moved along the tooth cut on the workpiece in the direction parallel to the wheel axis and simultaneously inform the cutter to move tangentially with the help of a copying device with a copier 3. The profile of the copier 3 of the copying device is made in accordance with the curvature of the cutting tooth.

Claims (1)

A method of shaping a tooth curved along the length of the cylindrical wheels by a worm cutter, in which the coordinated rotation and axial movement are reported to the wheel blank and the worm cutter, while using a copying device with a copy of the worm cutter, a movement along the tooth of the cut wheel is reported, characterized in that the said movement along the teeth of the cut wheel, the worm cutter is reported in a direction tangential to the wheel blank, and the copier profile is made in accordance with the curvature arches of the cut teeth, while the front and rear cutting angles on the sides of the tooth profile of the worm cutter perform 3 4 ^o degrees more than the angle of inclination of the said arch at the ends of the teeth of the cut wheel.

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