SU449766A1 - The mechanism for cutting pieces - Google Patents

Description

one

The invention relates to the field of forge and press equipment and can be used in cold-landing machines for the production of various products from bar and reel material.

A cut-off mechanism is known, mounted on a cold-heading machine bed and containing a lever swinging from a fist with a knife and a clamp connected by an intermediate link with its fist.

However, the known mechanism is not sufficiently productive due to its considerable inertia and does not provide the required quality of the cut edge.

In the proposed mechanism, these drawbacks are eliminated due to the fact that the intermediate link is made in the form of an axis in contact with the clamp installed on the bed in the frame at the time of cutting the eccentric adjacent to the clamp at the time of removing the knife from the copier blank, and two connected to each other through an adjustable spring levers, one of which interacts with the aforementioned fist.

FIG. 1 shows the mechanism for cutting the blanks; in fig. 2 - section along the AL; in fig. 3 - a section on B - B.

The mechanism of the cut contains snarl cut 1 with a cutting arm (knife) 2 and clamp 3,

fixed on the axis 5 having a lever 5 with a roller 6.

In frame 7, an eccentric 8 with roller 9 and copier 10 is installed in swing bearings. With an eccentric lever 11, carrying a nut 12, a cup 13, a spring 14, an adjusting screw 15 are rigidly articulated. An adjusting screw 17 is mounted on the lever 16 which is articulated with an eccentric. and roller 18. On the camshaft of the machine, the fists 19, 20, 21 are mounted.

By means of the spring 22, the roller 18 of the lever 16 is constantly pressed against the fist 21. The spring 23 holds the workpiece in the blade 2 and the clamp 3.

The mechanism works as follows.

After the end of the material feed, the cutting knife moves with the cut lever. The movement is carried out from the kulaks 19 and 20. During the movement, the piece of workpiece is carried out and transferred to the working positions 24. To avoid the workpiece bending at the time of cutting, the clamp 3 presses it against the knife 2. The clamping force is transmitted through the lever 5 to the roller 9 of the eccentric 8 and levers 11 and 16. The amount of clamping force is determined by the spring 14 and is adjusted with the nut 12 and the adjusting screw 15. The spring 14 acts on the lever 16 through the screw 15 and the bowl 13. With the knife moving further, the lever 5 comes off the roller 9 and the cut piece uder ivaets spring 23. On landing position zatalkivaets preform in a matrix. After the workpiece enters the matrix by a certain amount, simultaneous removal of the knife 2 and the pressing 3 from the workpiece begins, so that during the withdrawal the pressing does not touch the pushed workpiece. The knife is retracted by the fists 19 and 20, and the retraction is performed by the cam 10 by means of a spring 22 and the cam 21. During material feed, the press 14 is kept from contact with the metal by the cam 10.

Subject invention

The mechanism for cutting off the workpieces mounted on the bed of the cold-toping machine

and comprising a lever with a knuckle with a knife and a clamp associated with the intermediate knuckle, characterized in that, in order to increase productivity by reducing inertial masses and improving the quality of the cut end by controlling the force of pressing the workpiece to the knife, the intermediate link is made in the form of an axis in contact with a clamp at the time of cutting the eccentric, adjacent to the clamp at the time of the knife retracting from the copier blank, and two connected to each other through p adjust- able spring arms, one of which communicates with said fist.

Fig 7

. B