SU1094659A2 - Bevel thread roller - Google Patents

Abstract

CONIC CONVERT on author. St. No. 846024, characterized in that, in order to simplify its construction, all the deforming rollers are selected of the same width, and the end planes of each role are fi 3 1 4 SftI Siji - ..: ka are made parallel to one another and inclined to the axis of its rotation, with This angle of inclination of the end planes of the roller is determined by the formula o arctj} -, where 5 is the greatest width of the tooth profile of the original conical gear wheel of the conical expander; Z-the greatest width of the tooth profile of the original bevel gear of the conical wheel; DO is the outer diameter of the deforming roller

Description

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The invention relates to the processing of metals by pressure and can be used in the hardening method of surface plastic deformation of the depressions of bevel gears.

According to the main author. St. No. 846024 is known for a tapered roll-in, comprising a housing in the form of a bevel wheel and deforming rollers mounted on its surface with the possibility of free rotation around its axes and axial adjustment movement. The deforming rollers are located in several rows with a shift of the plane of symmetry of all the rollers of each row from the axis of rotation of the tool. The axes of rotation of all the rollers intersect with the geometric axis of the body at right angles. The planes of symmetry of the rollers of all the rows are equidistant from the geometrical axis of the body of the conical expander. The rotation axes of the rolling-row-deforming row are displaced relative to the axes of rotation of the adjacent row rollers along the generatrix of the conical surface by a certain amount, defined by the formula given in the description of the invention. The deforming rollers are made of different widths, and the body of the tapered roller is spring-loaded in the axial direction with a calibrated spring 1.

A disadvantage of the known conical runner is the complexity of its design, which is associated with the performance of each deforming roller (or groups of rollers) with a different width of the working section.

The purpose of the invention is to simplify the design of the tool.

The goal is achieved by the fact that in the tapered roll-in all the deforming rollers are selected with the same width, and the end planes of each roller are made parallel to one another and inclined to the axis of its rotation, while the angle of inclination of the end planes of the roller is determined by the formula

o (arc

S - the greatest width of the zugde profile of the initial conical gear wheel of the conical rolling wheel; Z is the smallest width of the tooth profile of the original bevel gear of the conical rolling wheel; DO is the outer diameter of the reinforcement

roller.

FIG. 1 shows a tapered roll-in (cut A-A in FIG. 2); in fig. 2 is a view B in FIG. one; in fig. 3 shows a section B-B in FIG. 2; in fig. 4 - reinforcing roller; in fig. 5 - installation diagram of the strengthening roller; in fig. 6 — trajectories of movement of the strengthening roller; in fig. 7 — trough of a bevel gear with traces of hardening; in fig. 8 is a machine engagement diagram.

The conical roll-in consists of a body 1 provided with inserts 2 having reinforcing rollers 3 freely rotating around their axes.

The inserts 2 are based in the housing 1 along the planes 4 and the anvil 5 attached to the housing 1, for example, with screws. In the prismatic grooves 6, prismatic crackers 7 are fixed. Between the breadcrumbs 7 two inserts 2 are installed, which are fixed by wedging crackers 8. Elastic gaskets 9 are provided between the walls of the insert 2 and the reinforcing rollers 3 to compensate for inaccuracies in the manufacture, assembly and installation of the tool with respect to the workpiece of the bevel gear, and allowing self-installation of the reinforcing rollers 3 of the conical roll in the cavities of the bevel gear. To avoid rubbing 3 working surfaces of the teeth of a hardened conical gear with the strengthening rollers, a gap of at least 0.1-1.0 mm is provided between them and the working profile of the wheel.

The ends 10 and 11 of the reinforcing rollers 3 are made parallel to each other and are inclined to the axis of rotation of the rollers by an angle a determined from the condition

Sz

w arc t

;

Do

-the most widening zugde profile of the initial conical gear wheel of the conical rolling wheel; - the smallest width of the tooth profile of the original conical gear wheel of the conical expander;

Do-outer diameter of hardening

roller.

Any position of the reinforcing roller 3 around its axis is uniform, since they are installed with the possibility of free rotation around their axes.

Strengthening roller can be obtained as follows.

A disk roller is produced, the working profile 15 of which corresponds to the tooth profile of the original bevel gear of the tool, in the most wide area. Thereafter, the ends 10 and II are formed at an angle of t.

The dimensions of the cavities of the bevel gears are variable along their length, which excludes the possibility of strengthening the cavities by moving the rollers only along the cavities of the workpiece. The advantageous kinematics of moving the reinforcing rollers when machining with a conical grinding wheel eliminates the possibility of their wedging in the pits of the gear, since the reinforcing rollers 3 are located in the tool body relative to the inside of the original helical bevel gear. During processing, they move closer to the bottom of the depression along arrow 12, entering and coming into contact with it, constantly moving along the depression along arrow 13 due to the kinematic slip characteristic of all types of helical gears, a special case of which is reproducible in machine tools meshing hypoid gear conic breaker - blank.

The obvious impossibility of jamming the reinforcing rollers of the conical roll in the troughs of the bevel gear is consistently confirmed by the fact that at the time of hardening the rollers 3 are mounted in the tool body relative to the original tool surface in the form of a helical bevel gear in the tool body when found in the bevel gear. engaged with the workpiece. The body 1 of the conical roll-in axially is spring-loaded with a calibrated spring 14, the compressive working force of which corresponds to the strengthening force.

The conical breaker works according to the rolling method and can be used on gear milling semi-automatic machines designed for machining spur gears and commercially produced by domestic industry. When machining the gear grooves, the latter are mounted on the spindle mandrel, and the tapered roll-in.

The nickname is attached to the machine table. During the running-in process, the strengthening rollers 3 of the tool engage with the bevel gear and roll the bottom of the valleys between the ridges.

The proposed conical breaker allows hardening of the troughs of bevel gears with both straight and oblique teeth; it is simpler in design.

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Claims (1)

CONIC SHAFT by author. St. No. 846024, characterized in that, in order to simplify its design, all the deforming rollers are selected of the same width, and the end planes of each role are parallel to one another and inclined to the axis of rotation, the angle of inclination of the end planes of the roller is determined by the formula where S -the largest width of the tooth profile of the original bevel gear of the conical run-in; Z is the largest width of the tooth profile of the original bevel gear of the bevel obkatnik; The detectable diameter of the deforming roller;