SU1202673A1 - Apparatus for cutting springs - Google Patents

Description

one

The invention relates to the processing of metals by pressure, in particular to equipment for cutting springs from 1WORKS, of a predominantly small index, which is characterized by large forces on the cutting tools.

The aim of the invention is to improve the quality of the springs.

1 shows a cutting device with a floor of the pusher and the inner knife at the end of the spring entry on the rod of the inner knife, isometric.} FIG. 2 shows the cutting device at the initial position of the pusher and the inner knife before starting the spring on the rod of the inner knife, common view; fig. 3 - the same, with the position of the pusher and the inner knife at the end of the spring on the rod of the inner knife} in figure 4 - the same, with the position of the pusher and the internal knife at the end of the spring cut and the beginning of the separation of the internal knife figure 5 - the same, when the position of the pusher at the time of meeting with the inner knife and the body of the coil in Fig.6 - the same, when the position of the pusher and the inner knife at the time of discharge of the cutting spring from the knife shaft of Fig.7 - types A 2 n FIG. 8 is a section BB in FIG. 7.

The cutting device comprises an outer knife 1 fixedly mounted on the bed, as well as a bracket 2, on which the fork 4 is loosely seated, carrying the inner knife 5. A spring-loaded sleeve 6 is placed on the wall of the inner knife 5, intended for —resetting the cut spring from the inner rod knife 5.

On. The semi-axis x 3 is also freely seated a fork 7, carrying the pusher 8, interacting with the core of the inner knife 5 and receiving rolling movement through the axis 9 from the connecting rod 10.

The pusher 8 has protrusions 11 alternating with spiral grooves 12 so as to allow the protrusions 11 to freely pass between the turns of the spring to be cut in order to transmit movement to the inner blade 5.

Spring 13, pressing the plug 7 to the stop 14, thereby holding vn2026732

Trenniy knife and pusher 8 in the severed. the position in order to ensure the free passage of both the spring to be wound on the inner blade of the knife, and the discharge of the cut spring from it.

The connecting rod 10 is connected to the tool holder 16 by means of an axis 15, making reciprocating-10-motion.

To increase the contact area, the profiles of the protrusions of the pusher and the inner knife are made along mutually mating surfaces.

15 The cutting device operates as follows.

In the process of winding the spring, its coils, which go to the core of the inner knife 5, move the spring-loaded sleeve 6, thereby creating elastic forces in it to reset the cut spring.

After the kinematic stop of the process of winding one spring and

25 of turning on the mechanism of cutting the slider-tool holder 16 of the machine through the connecting rod 10 and the axis 9 rotates around the axes 3 forks 7 with the pusher 8. Together with the fork 7

30, the fork 4 is tied, pressed against it to the stop 14 by means of a prulshna 13 and the carrying inner knife 5.

Meeting with the coil body of the coiled 35 spring lying on the stationary knife 1, the movement of the inner knife initially stops, after which the gap between the pusher 8 and the core of the inner knife 5 is selected. The violent impact of the pusher 8 on the inner knife 5 leads to a split 1 G1 (cut) at a given place of the coils of the spring.

45 After cutting off the coil under the action of the spring 13, the fork 4 with the inner knife 5 is pressed again against the stop 14, while withdrawing the protrusions 11 of the pusher 8 from the inter-turn space. Upon further downward movement of the connecting rod 10, the inner knife 5 together with the cut spring on its shaft leaves the zone of contact with the outer knife 1 and the cut spring is dropped from the inner knife shaft 5 by the elastic forces of the depressed spring loaded sleeve 6.

50

55

When the crank U moves upward, all elements of the cutting device return to their original position. Then the cycle is repeated.

The proposed design of a spring cutting device allows for a better cut surface.

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VNIIPI Order 8351/9 Circulation 646 Subscription Affiliate PGS Patent, Uzhgorod, Proektna St., 4

Claims (1)

DEVICE FOR CUTTING SPRINGS in spring coiling machines, including internal and external knives mounted on the mandrel bar, mounted for moving one in the direction of the other, and a crank-lever drive, characterized in that, in order to improve the quality of the springs, it has a spring-loaded plunger the sleeve for removal of springs, is fixed. the axle on the base and two forks, spring-loaded one on the other, pivotally mounted on the axis, on one of which the mandrel bar with the internal knife is rigidly fixed and the spring-loaded bush located on the rod for spring removal, and on the other is the pusher installed with the possibility of interaction with the rod at the moment of cutting the spring, while the outer knife is fixedly mounted on the bed, the pusher on the working surface has spiral grooves, the step of which corresponds to the 15th step of the spring, and the fork on which the pusher is fixed is kinematic cally linked to the drive.