SU884896A1 - Gear working machine - Google Patents

Description

(54) TOOTHING MACHINE

I

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The invention relates to metal working and will find application in the manufacture of gear wheels.

A gear processing machine is known, in which two tool heads mounted on a support are connected to a machining wheel with a 11 "wheel, an inclined vertical axis of rotation, and a rolling chain including bevel gear 1.

The disadvantage of the known machine is that it can handle gears with a spread in a small size range.

The purpose of the invention is the refinement of technological capabilities.

In order to achieve this goal, circular support directions are made on the caliper with the center coinciding with the center of symmetry of the bevel wheel, on which tool heads are placed with the possibility of turning in the horizontal planes.

FIG. 1 shows a gear processing machine; general view; in fig. 2, section A-A in FIG. one; in fig. 3 section bb in fig. 2; in fig. 4 section bb in FIG.

The machining machine consists of a bed 1, on which vertical directions are made to move to move the machine 2 support using the lead screw 3 and horizontal guides to move the table 4 using a screw pair 5 with a detachable nut. On the table 4 of the machine, the workpiece is rigidly fixed Ley 6. Caliper 2 has guides that are made circular.

Two instrumental barebones 7 mounted in circular directions

15 caliper 2 can be rotated at angles and in a horizontal plane relative to the longitudinal axis of the machine. The rotation of the tool heads 7 is carried out individually with a screw-nut gear transfer (not shown) for 20 ms. For fastening the tool heads on the caliper, after turning, there are bolts 8.

In tool heads 7

25 spindles 9 and 10 are mounted, on which tools 11 and 12 are fastened. Spindles 9 and 10 are installed with a slope in. vertical planes meet each other at constant angles of SU and that correspond to

lifting angles of helical lines 11 and 12.

Tool spindles; by means of bevel gears 13 are connected to a bevel gear wheel 14, which is mounted in the center of the circular guides 2 of the machine.

Tools 11 and 12 and the workpiece wheel blank b are connected by a rolling chain. The run-in wheel of the machined wheel b consists of bevel wheels 13 and 14, a splined shaft 15, a support 2, a screw 16, a worm wheel 17, a guitar of replaceable gear wheels 18-20, a splined shaft 21, a screw worm 22 and a worm wheel 23 of the table 4 .

To change the magnitude of the rotational speed of the tools 11 and 12 and the speed of movement (supply) of the caliper, the fast-line guitar and the feed guitar are installed on the machine, respectively, consisting of interchangeable gears 24-28. Gears 26 and 24 are mounted on bearings and are not connected to spline shaft 15 and the lead screw 3. The connection of these wheels with the lead screw 3 and the splined shaft 15 is made by cam clutches 29 and 30.

The change in the direction of movement of the feed for the slide 2 is accomplished by changing the direction of rotation of the motor 31.

To adjust the machine, a reversing mechanism 32 with a clutch 33 is installed. It changes the direction of movement of the table 4 relative to the caliper 2 With the help of a screw pair 5. The machine is controlled by the couplings 29, 30 and 33 and the starter of the electric motor 31 (not shown).

Before work proizvsdits. setting up a gear-cutting machine for machining a spur gear in a single pass. I install and fix the workpiece blank b on the table 4-machine. On the spindle 10 of the tool head 7, as a tool 12, a worm milling cutter is fixed with an elevation angle of the right helix of teeth.

On the spindle 9 of the tool head 7, a two-case worm knurling tool 11 is installed and secured, for example, with the elevation angle of the left helix deformed into rollers tS. Tool cases are spring-loaded towards each other.

Tools 11 and 12 must have the same number of helix runs and be set at an equal distance from the center of the tapered 14 to the beginning of the turn of their helixes.

It is also necessary to fulfill the condition in which the beginning of the helical lines of the tools 11 and 12 are at an equal distance from the key groove of the tool bodies. If the instruments have one pass each, then the guitar of the replaceable wheels 18–20 of the rolling chain is tuned so that in one turn of the instruments the wheel being turned turns one step.

The tool heads 7 are rotated at angles f and Vg and fastened to the caliper with bolts 8. The angles of rotation of the tool heads are determined from the ratios:

, .aatj | 520 where OE U5 c. -.

Dee "-.

OS

T

EO and CO are the distances between the axis of rotation} (1 central bevel gear 14 and the middle of tools 11 and 12 (they are determined when installing

tools); D - the diameter of the workpiece machined wheels 6; Dsch - tool diameter 12 Di tool diameter 11.

The guitar of the interchangeable gears 28, 27, and 24 is tuned to obtain the appropriate amount of support for the caliper 2, and the guitar of the interchangeable gears 28, 25, and 26 are adjusted to obtain the p1 estimated machining speed V.

The machine works as follows: the actuator includes an electric motor 31, the rotation from which is transmitted to the guitars of the interchangeable gears 28, 27, 24, 25 and 26. By turning on the fta 30, the rotation is transmitted from the wheel 26 to the splined wheel 15 of the support 2, the central bevel wheel 14, bevel wheels 13 and spindles 9 and 10 of tool heads 7. At the same time, spindles 9 and 10 rotate in different directions, i.e. towards each other, at speeds V and V, as they are in cleavage with a conical wheel with diametrically opposite btorons (conical reversing mechanism).

The rotation of the splined shaft 15 through the worm to 16 and the worm wheel 17 is transmitted to the interchangeable gears 18-20, the splined shaft 21 of the table, the worm to 22, the worm wheel 23 of the table and the table 4 of the machine with the workpiece blank. 6. For - movement of the table 4 relative to the caliper 2 include the coupling 33 of the reversing mechanism 32 in

one or the other side and change the direction of rotation of the screw pair 5.

At the end of the orientation, the workpiece 6 of the machined wheel 6 with respect to the tools 11 and 12 turn off the clutch 33 and turn on the clutch 29, while the rotation from the wheel 24 is transmitted to the lead screw 3 and the caliper 2 cam moves downwards with the working feed S,

Looking around its axis at a speed V, the tool 12 cuts in a single pass the tongue on the workpiece of the wheel 6 being processed as it rotates with the grinding speed 1y. At the same time, tool 1. rotates around its axis at a speed V.

After finishing the machining of the teeth; turn off the clutch 30 and stop the tools 11 and 12 and the wheel to be processed b.

Switch the motor 31 to the accelerated reverse rotation and return with accelerated flow suppts t 2 to its original position. The machine is ready for processing the next wheel.

On the proposed gear processing machine it is possible to process gear wheels in a wide range of sizes.

Claims (1)

1. US patent W 3662650, CL. In 23 F 5/20, published. 1972. 1 QD i AA e 23 z 3UJc ut.3 22