SU1248716A1 - Arrangement for upsetting flexible cores on horizontal forging machine - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to the landing of flexible rods on horizontal forging machines.

The purpose of the invention is to improve the quality of the product by providing an accurate value of the length of its core part.

The drawing shows the device in the two extreme working positions (above the axis is the initial position, below the axis is the end of the upsetting of the flexible rod), general view.

The device contains a punch 1, two semi-matrices 2 with a smooth clamping brook, reinforced respectively on the upsetting and clamping sliders of a horizontal forging machine, a bar 3 rigidly fixed on the bed of a horizontal forging machine, a stop bolt 4 installed in sleeve 5, which is fixed by nuts 6 and is set to the working length of the flexible rod of the billet to be planted, the compensation spring 7, selected from the condition of preservation by the flexible rod (billet) of stability. Nuts 8 mounted on the threaded part of the stop bolt, one of which is the counter, adjust the position of the stop bolt 4 with the installed pre-selected spring, taking into account the required value S.

The required spring rate is determined from the formula

„(0.01-0.8) (3.29 Ehb3)

 -P12

e Z - spring stiffness, kgf / cm;

h - the height of the smooth clamping brook matrix;

b - the width of the smooth clamping stream

matrices;

1 — distance between the die and the stop bolt, cm;

E is the modulus of longitudinal elasticity of the planted billet, kgf / cm;

K-maximum deformation of the springs before the coils touch.

As the spring stiffness increases, the accuracy of the length of the core part of the product increases.

During the landing, the flexible rod blank is placed in the semi-matrix 2 and rests on the end of the stop bolt 4. During the working stroke, the second semi-matrix 2 clamps the workpiece, the punch 1 acts on the workpiece with axial force, which is opposed by the friction force in the smooth junction of the half-matrix 2 stream and the compensation force spring 7. When the thrust bolt 4 acts on the end face with a force exceeding the spring force, the latter is compressed and the stop bolt 4 moves by an amount of 5. This movement continues until the beginning of the formation of a barrel shape on landing end of the workpiece when the force exerted by the punch is balanced by the friction force in the clamping stream of semi-matrix 2 and the force of the compressed spring 7. The device is adjusted to the working length of the forging rod by means of a threaded adjustment sleeve 5 and nuts 6. The value S is adjusted by tightening the compensation springs 7 with nuts 8. The more spring tightening, the smaller the value of S.

After the landing is completed, the punch moves to its original position, the half-matrix is dispersed, the product is released, and the stop bolt 4 is returned to its original position by the action of the compensation spring 7.

With the help of the proposed device, the production of blanks from art. 5 section 8x26 .mm stamped with split dies with a smooth clamping creek. The landing is carried out from identical blanks 360 mm long with the upsetting part in a gas furnace heated up to 1100 ° C on a horizontal forging machine of size 1. The length of the product core according to drawing 340 + 4 mm. As a result of the landing of the flexible rods on the proposed device, the length of the core part of the product is 340 + 1 mm.

Claims (1)

DEVICE FOR LANDING FLEXIBLE RODS ON HORIZONTAL FORGING MACHINES, comprising a drive punch, a landing matrix mounted on a bed and a back stop, characterized in that, in order to improve the quality by ensuring the exact length of the core part of the product, the back stop is made in the form of a bar, mounted on it the sleeve and the stop bolt, while the sleeve is placed on the bar with the possibility of adjusting axial movement, and the stop bolt is installed by the rod part in the sleeve and is spring loaded relative to it COROLLARY spring. SU „1248716