DE402211C - Milling device, especially for the manufacture of bevel wheels - Google Patents

Description

Attempts have already been made ^{to avoid the two times 1} passing the milling cutter through the tooth gaps of bevel gears for the purpose of producing ^{1 of} the converging tooth flanks by moving two common milling cutters against each other by means of adjustable guide rails when the milling cutter is advanced.

Attempts have also been made by an additional transverse movement of the milling spindle

ίο the diverging flanks of the bevel gear tooth gaps to manufacture.

Such machines. but cannot be used in practice because the milling cutter is the one to be milled Bevel gear tooth engages not parallel, but at an angle to the tooth flank and as a result among other disadvantages, an exact tooth shape cannot be achieved.

This is avoided in the invention in that the one carrying the workpiece Dividing head inevitably receives such a back and forth movement from the milling spindle, that with simultaneous longitudinal feed through the self-motion of the milling machine table both flanks of two adjacent

the condition to be milled bevel gear corresponding to the tooth form in each case one surface of the milling cutter ¹ with a limb of the angle of convergence is coincident as opposed teeth.

In the drawing, an embodiment of the invention is shown in perspective, pages and Top view shown, but the dividing head is omitted in Figs. 2 and 3

The device essentially consists of one that can be screwed onto the milling machine table 1 Base plate 13 on which a support plate pivotable about a pin 14 2 for the part head 3 carrying the workpiece to be milled 11.

This support plate 2 is at its free end by a connecting rod 4 with a crank 5 connected, the crank pin is adjustable to the desired deflection of the support plate Set 2 for the dividing head 3 according to the convergence angle of the bevel gear to be able to.

The crank 5 receives its drive from the milling machine spindle 7 through intermediation a bevel drive arranged in a housing 6 on the spindle 7, its rotation by means of a flexible or articulated shaft 8 to an axially displaceable in the housing 9 Shaft ίο and is transmitted from this to the crankshaft S by gears or the like.

The operation of the device is as follows:

First you bring the device on the table 1 of any simple or universal milling machine and fastened in a suitable manner the base plate 13 and the Housing 9 on the same, also on the. Milling spindle 7 the bevel gear. Then it will be the bevel gear to be milled is placed overhung on the indexing head and the indexing spindle accordingly adjusted to the pitch angle of the bevel gear.

for correct swiveling of the dividing ■ head plate 2 -required stroke length on the basis of a scale. Then the dividing head 3 is advanced so far with the help of an indicator, that the tip of the partial cone of the bevel gear exactly above the pivot point of the partial head plate 2, d. i. Central axis of the pin 14, lies.

Now, when the milling spindle is rotated, the part device 3 and the plate 2 are through the Crank 5 set in a reciprocating transverse movement, so that at the same time Longitudinal feed through the self-motion of the milling machine table 1 both flanks of two adjacent teeth exactly at the corresponding angle of convergence of the bevel gear edited at the same time. It is useful here to reduce the rotational speed speed of the milling spindle 7 to rotate the Kurbei 5 to choose that the crank at a Revolution of the cutter executes half a revolution.

Milling bevel gears is a precise task for the worker operating the machine as easy as milling a customary brow rail, and it is only necessary manoeuvrable, after completing a tooth gap, crank back the milling machine table 1, to arrange the usual dividing process and to set up the table for the self-walk 3p switch.

Claims (1)

Patent claim: Milling device, in particular for the production of bevel gears, characterized in that that the dividing head (3) carrying the workpiece from the milling spindle (7) inevitably experiences a back and forth transverse movement, so that at the same time Longitudinal feed through the automatic movement of the milling machine table (1) both Flanks of the tooth gap of the bevel gear to be milled (11) the corresponding tooth shape obtain. Fig. .14 Fig. 2. 4th 1 ¹ V it rf f I 1 ..P Il, I ' ! ^{l! l} · f | l I I iff 9 - * 11 / J 1 rfr fl -13