SU1030115A1 - Machine for cutting right and left relieving threads - Google Patents

Abstract

MACHINE FOR CUTTING RIGHTS ON LEFT DAMAGING THREADS, containing a kinematic chain consisting of interconnected drive; main motion, spindle, two spindles, calipers, which, in order to increase productivity I by simultaneously cutting : outlets and left-handed threads, in the keys: a large chain between the spindle and one of the spindle screws is introduced {the pitch increase link, the reversible band and the guitar of the replaceable wheels. : 00 SP

Description

The invention relates to metal working and can be used in the manufacture of taps.

A known machine for cutting the right and left occluding threads, comprising a kinematic chain consisting of a main movement drive interconnected, a spindle of two spindles with supports 1

The disadvantage of the machine is the impossibility of simultaneously cutting the right and left rounding threads, i.e. low productivity

The purpose of the invention is to increase productivity by simultaneously cutting the right and left back threads.

To achieve this goal in a machine for cutting right and left occlusive threads, containing a kinematic chain consisting of a main drive drive, a spindle, two running screws with supports, connected to each other, a spindle in the kinematic chain and a spindle increase the pitch, reversible band and guitar replacement wheels.

The drawing shows a kinematic diagram of a machine for simultaneously cutting the right and left occlusive threads.

The machine contains a main movement chain, which includes a DRIVE 1, Made, for example, in the form of an electric motor, a speed box 2, a reversing group 3, a spindle 4 with a device for fastening workpieces (taps).

Thread-cutting chains contain a link of 5 increments of pitch, reversible groups b, guitars 7 replaceable wheels, boxes 8 innings, pairs of spindle nut 9-10. Nuts 10 with longitudinal props with calipers 11, in which transverse calipers 12 with toolholders 13 are installed. In the latter, cutting tools 14 are installed, for example, thread-cutting comb

The proposed machine adjusts for cutting, for example, a three-pen tap (Ml4X1) as follows.

Depending on the type of material being processed and the size of the tap, the required frequency of rotation of the spindle -4 is set.

Depending on the parameters of the tap, the necessary gear ratios are established in the thread-cutting chains: in step links 5, step 5, guitars, 7 replacement wheels, feed boxes.

G. .

One of the chains is adjusted for cutting the right occlusive thread (M14x1 4 zah. The number of hits of the right thread is determined by the formula

npQft l lr

where Z is the number of visits of the occluding thread, and is the number of feathers of the tap.

The pitch of the back threads is equal to the pitch of the main thread.

And the other chain is tuned to cutting the left rearing thread. 5 (M14X1 2-z;

- -

The relative axial displacement of the combs and turns of the main thread of the tap is determined and, in accordance with the invention, the combs 14 are set to the original position.

The beginnings of calls right threads

Sliver on - -E 1,. .,with ..

Y14. +. zi 0, mm

and the left on

0.5 mm. 11-1

B - 1

where p is the pitch of the main thread.

Turn on the machine. At the same time cut the right and left eatylrue threads. The spindle 4c with the taps being machined receives rotation, and the super-ports 11 receive an axial displacement. One of them moves along direction 45 to the spindle 4, and the other from: it, which ensures simultaneous cutting on the workpiece of the right and left rear threads

50 The invention makes it possible to significantly increase the productivity of the backing process.

Claims (1)

MACHINE FOR CUTTING THE RIGHT AND LEFT REVERSE THREADS, containing a kinematic chain consisting of interconnected main drive drives, a spindle, two lead screws with calipers, characterized in that, in order to increase productivity by simultaneously cutting the right and left occipital threads , in the kinematic chain between the spindle; and one of the spindles introduced step increment link, reversible; band and guitar of interchangeable wheels. ? ’ Yu ϊ