SU114557A2 - Tool for tapping nuts - Google Patents

Description

Basically auth. St. No. 81974 describes a tool for cutting threads in nuts with a tap, equipped with a curved shank located in a detachable chuck mounted on the machine spindle, using a guide sleeve for fixing the blanks during cutting and a spring-loaded pusher for feeding them, controlled by a lever.

The proposed tool allows the use of the force developed by the workpiece as it moves along the tap in the thread cutting process to automate the supply of a new workpiece with a spring-loaded pusher. This is achieved by the fact that the lever controlling the movements of the pusher is articulated with a lever stop mounted in the path of movement of the workpiece to the tap.

The drawing shows the scheme of the proposed tool for tapping the nuts in the nuts.

The rotating tool is the tap 1, which is placed in the chuck 2, mounted on a spindle, for example a lathe, a bolt-tapping machine, and the like.

Cartridge 2 consists of two symmetrical parts, connected by bolt 3 with centering stud 4.

Periodic automatic feeding of the blanks to the tap is carried out by the feeder 5 mounted on the body of the holder fi.

Billets freely, under the influence of the force of their body, fall from the store into the receiver holder 6.

On the path of the workpiece to be machined, a lever stop 7 articulated with a lever 8 which, through a link 9 controls the movement of a pusher 10 equipped with a spring //, the force of which is adjusted by a nut 12, is installed on the path of the thread cutting.

Le P4557

In the process of threading the workpiece (nut), the latter moves along the tap / in the direction of the arrow A.

When reaching the lever stop 7, the workpiece turns the latter counterclockwise with its lower part, as a result of which the pusher 10 is retracted to the rear position by means of the lever 8 and the shackle 9, compressing the spring //.

Upon further movement of the workpiece along the tap, the lever stop 7 is released, and the pusher 10 under the action of the springs 11 automatically feeds the next workpiece into which the end of the tap is cut, and the process of threading and automatic feeding repeats.

The machined blanks are prevented from being dropped by centrifugal force on the non-working part of the tap with a plate spring 13 fixed on the lower bent shank of the tap.

As the billet accumulates, the billets periodically collide with the shank of the tap into the receiving box.

Coolant is supplied to the tap through fitting 14.

Subject invention

A device for cutting threads in nuts with a tap on the author. sz. No. 81974, characterized in that, in order to use the force developed by the workpiece as it moves along the tap in the thread cutting process, to automate the supply of a spring-loaded pusher of a new workpiece, the lever controlling the pusher is attached to the lever stop mounted on the movement path of the workpiece to the tap.