SU971596A1 - Worm wheel cutting machine - Google Patents

Description

The invention relates to the field of machine tools.

A known machine for cutting worm gears is a worm milling machine connected by a chain of rolling with two carrier tables for cutting the wheels / which are connected by a kinematic chain that includes a brake with the lead screw of the mechanism for moving the wheels along the mill axis l.

The disadvantage of the machine design lies in the fact that the brake switches alternately on either the feed movement (movement of non-rotating cutting wheels along the axis of a continuously rotating cutter), or when the feed is turned off, the rotation of the cutting wheels associated with the rotation of the cutter, i.e. on the machine it is impossible to combine the feed movement and the running-in movement. The separate in time execution of these movements decreases the productivity of the treatment.

The purpose of the invention is to show the performance.

To achieve the goal, the proposed machine is equipped with an additional kinematic chain, mounted in parallel to the chain of tables — a lead screw containing a setting element and

switching mechanism, the latter is interlocked with a brake.

The drawing shows a diagram of the machine.

Claims (1)

The machine contains two tables 1 and 2 installed with the possibility of rotation, carrying cut worm gears 3 and 4. Tables 1 and 2 and tool spindle 5, carrying a worm mill 6, are interconnected by a kinematic run-in chain containing the setting body 7 in the form guitars of interchangeable gears and a summing mechanism, for example, a conical differential 5. The instrumental spindle 5 is connected to the motor 10 through the main movement circuit through the tuning organ 9. The tables 1 and 2 are connected by two parallel kinematic chains with a lead screw 11 ma movable cutter wheel along the axis 6. One of these chains pass through a summing mechanism 8 and comprises a body 12 settings. On one of the elements of this chain, a programmable brake 13 is installed. The second additional chain passes, a differential, minus, and contains a setting unit 14 for the feed amount and a switching mechanism 15 which is programmed and interlocked with the brake 13 so that when the brake is off 15 closes this circuit, and when the brake is on, opens it. The machine can operate in two modes. In the first case, the wheels are cut while they are continuously moving along the cutter axis, and in the second case, the axial movement of the wheels is absent. In the first case, the mechanism 15 is turned on, and the brake 13 is disabled, therefore movement from the engine 10 through the adjustment body 9 is transmitted to the running chain and the tables 1 and 2 and the spindle 5 receive rotational movement around their axes with the angular velocity ratio specified by the setting body 7. At the same time along the kinematic chain containing the adjustment body 14, the mechanism 15 and the lead screw 11, the cut wheels 3 and 4 receive a movement along the cutter axis b. The speed of this axial displacement is adjusted by unit 14. The additional rotation associated with the axial movement of the wheels being cut is provided by the kinematic chain passing through the body 12 and the summing mechanism 8. The ratio of the speed of the additional rotation of the wheels being cut and their axial movement is adjusted by the body 12 When the brake 13 is applied and unlocking the movement mechanism 15, the wheels being cut and the cutter are transmitted only along the running-in chain, therefore cutting is carried out without axial movement of the tool. By switching over the program of mechanism 15 and brake 13, any of these modes is set, as well as their continuous alternation. The presence in the proposed machine, in contrast to the known kinematic chain, linking the differential to the mine, cutting the wheels with the feed screw and the gear mechanism installed in this chain, interlocking with the brake in the chain, ensures a stable uniform embedding motion (). As a result, it is possible to cut the wheels in optimal conditions, which improves the processing performance and durability of the cutting tool. The invention The machine for cutting worm wheels is a worm milling machine connected by a chain of rolling with two tables carrying wheels to be cut, which are connected by a kinematic chain that includes a brake with a spindle of the mechanism for moving the wheels along the axis of the milling machine, characterized in that, in order to increase productivity, the machine is equipped with an additional kinematic chain, mounted in parallel with the chain of tables, the lead screw and containing the adjustment element and the switching mechanism, the latter being interlocked with the brake. Sources of information taken into account during the examination 1. US patent No. 2603131, cl. 90-11.42, published. 1952.