SU903000A2 - Apparatus for cutting-off measured works - Google Patents

Description

: The invention relates to the field of metal forming, in particular to dies for cutting bar and sheet material, and is an improvement of the device for cutting dimensional blanks according to the author. Ev, No. 657932.

According to the main author. St. 657932. A device for cutting dimensional workpieces is known, comprising a feed mechanism, a cutting unit, front and rear guides of the supplied blanks located on both sides of the cutting unit, a rear stop and an ejector positioned between the plate guide and rear guide and made in the form of a plate. thickness, at least equal to the thickness of the workpiece.

A disadvantage of the known device is that the ejector and the support for it are made in the form of solid plates. As a result, not only the dimensional billet, but also the nonmeasured residue — the metallurgical end and the end residue — are fed to the shaping machine, and the billet is oriented only along the horizontal plane, which reduces the overall performance of the device.

The purpose of the additional invention is to increase the productivity of pa. bots device 5tva for. trimming dimensional blanks.

For this purpose, in the device for cutting measured blanks according to the ed. St. No. 657932, the ejector is designed with a groove for resetting the non-measuring residue, and the ejector guide plate is made in the form of two guides installed at a distance from one another, without interrupting the minimum permissible length of the dimensional workpiece.

To increase the reliability of removal of the remaining residue, the ejector guides are made with an inclined

20, a working surface located at an angle oL to the horizontal plane, the surfaces of the ejector, which are arranged to interact with the inclined surfaces of the guides, are also made. inclined at an angle pt, and the distance between the guides is determined by the following relationship:

eWL -ci4g V b -a /

thirty

where C is the distance between the guides;

L is the length of the unmeasured residue; a is the width of the guides; cL bevel angle of guides; b - height (diameter) of the rolled steel.

FIG. 1 shows schematically the proposed device, the section in FIG. 2 is a section A-A in FIG. I; in fig. 3 — ejector guides with inclined working surfaces; in fig. 4 — ejector guides with cylindrical working surfaces.

The device for cutting dimensional workpieces contains, on a common case 1, a feed mechanism 2, a cutting assembly comprising presser 3, movable 1st 4 and fixed 5 knives, guides b and 7 for rolled steel 8, an emphasis 9 and an ejector 10 mounted on guides 11, also intended for storing and delivering the measured blanks 12 to the shaping equipment (not shown).

The feed mechanism 2 is designed to feed the rolled metal 8 through the guide 6, located along the rolling line to the fixed knife 5, and through the direction southward 7, located along the feeding line behind the movable knife 4, to the stop 9, which serves to measure the length of the workpiece 12 Guides b and 7 and the stop 9 are coaxial with the direction of supply of the rolled product 8. Under the guide 7 are placed with the possibility of reciprocating movement along the directors 11 of the ejector 10, which serves to guide and support the rolled steel 8, as well as to feed the measured blanks 12 to shaping equipment.

The height of the ejector 10 is chosen to be equal to or greater than the height (diameter) of the rolled steel 8.

The ejector 10 is provided with a through elongated groove 13 for removing the unmeasured residue located under the guide 7. The slope 14 and the chamfers 15 of the groove 13 exclude the rolled stock 8 and ensure unimpeded delivery of the end residue exceeding the length of the groove 13 along the stop to the stop 9.

The guides 11 are set apart from each other at a distance not exceeding the minimum allowable length of the workpiece and determined for specific values of a, b, L, Cs and guided angle oL

11 see the reliability of the removal process of the residue. Guides 11 with their side surfaces 1B orient the blanks

12p verti tal plane. Napriip Yushis 1 Moryi be performed

with cylindrical working surfaces (see Fig. 4).

The ejector 10 is provided with a drive for reciprocating and moving along guide rails 11 made in the form of a toothed rack 17 and driving gear 18. The ejector 10 can also be associated with an arc type of drive reciprocating movement.

The movable knife 4 and the clamp 3 of the rail assembly are equipped with a reciprocating movement mechanism.

The device works as follows.

The car 8 is preloaded into the feed mechanism 2 and is fed through the guides b and 7 and along the upper surface of the ejector 10 until it stops 9. After that, the ejector 10 extends out from under the car 8 and during the working stroke of the cutting unit the presser 3 presses the car 8 6. Then, the movable knife 4, moving downward during the working stroke of the cutting unit, cuts the measured workpiece 12 from the rolled stock 8 and lowers it onto the guides 11.

When the cutting assembly is idling, the movable knife 4 and the clamp 3 return to their original position, freeing the hire 8 from the fixing forces.

Thereafter, the .10 ejector, driven by the bristles 18 through the rail 17, removes the dimensional blank.

12 from the working zone of the device, moving it along the guides 11 to the shaping equipment.

Then the cycle of operation is repeated.

When fed into the space between the cutting plane and the stop 9 of the end of the previous rolled stock 8 length less than the size of the groove 13 in length, this end residue under the action of gravity through the groove

13 falls into the space between the rails 11. As a result, the next bar 8 is fed to the stop 9. At the same length of the previous and subsequent bar 8, the cycle of operation and removal of the end residue through the groove 13 of the ejector 10 is repeated.

When applying to the space between the cutting plane and the stop 9 of the end residue of rolled 8 with a length greater than the size of the groove 13, this end residue along the slope 14 of the ejector

10 and guide 7 is fed up to the stop 9. After the ejector 10 is extended out of the rolled 8 and at the working stroke of the cutting unit, the end residue begins to fall s in the initial stage of the cutting cut, and the metallurgical end is lowered by the cutting unit to one of the guides

11 after the segments from the rental 8 at the end of the stroke. These unmeasured residues, not having a second support and being asymmetrically relative to a single support, overturn into the space between the guides 11.

The use of the described additional invention will improve the performance of the device for cutting dimensional blanks.

Claims (2)

1. Device for cutting dimensional blanks according to ed. St. No. 657932, characterized in that, in order to increase the productivity of work by allowing the unmeasured residue to be removed, the ejector is made with a groove for resetting the unmeasured residue, and the guide plate is made in the form of two guides installed at a distance from one another the minimum allowable length of the measured workpiece, 2. The device according to claim 1, characterized in that, for the purpose of C 13 W // W // W // A U //// 7 ///// A . W W f increasing the reliability of removing a non-dimensional residue, the ejector guides are made with an inclined working surface located at an angle to the horizontal plane, the ejector surfaces arranged to interact with the sloping surfaces of the guides are also made inclined at an angle cL, and the distance between the guides are according to the following dependencies: eWL -a4gr oi.tf-a, between the direction distance five lchimi; L a length of unmeasured residue; width of guides; d, guide rake angle; height (diameter) cut-b 0 rolled out. Sources of information taken into account in the examination 1. USSR author's certificate number 657932, cl. B 23 D 33/02, 29.12.77 5 (prototype). // F (7/7 // X // // // L (7 // L L. 5 S (Puz. / TZ Iff G2