RU2030944C1 - Device for forging hexagonal parts from sheet products - Google Patents

Abstract

FIELD: forging of sheet products. SUBSTANCE: device has cutting punches arranged in transverse row. Strip edge cutting punches are also positioned in this row of punches. Knives for cutting uncut parts and thrust plank with openings for passage of uncut parts are positioned behind row punches. At first, several parts are cut from strip, then remaining parts are cut out. EFFECT: increased output of high-quality parts, reduced cutting force, improved geometry and ease of manufacture. 2 cl, 1 dwg

Description

 The invention can be applied in those industries where tubes with fillers are manufactured, i.e. in the production of dry elements, toothpaste, medicines, creams, etc. Planting cylindrical tubes from hexagons provides identical results compared with planting from round billets used universally.

 Closest to the invention is a device for stamping hexagonal parts from sheet metal, comprising a fixed plate on which there is a stop for fixing the material to be processed and a die die and pieces with working holes and a cutting edge, and a movable plate on which are mounted in a row perpendicular the direction of movement of the processed material, punches for cutting, each located with its opposite faces perpendicular to the direction of movement of the processed material la and placed one from another at a distance between their ribs, equal to the length of the face of the hexagon, and a knife for cutting parts formed between punches.

 A disadvantage of the known device is a low yield, a large cutting force, distortion of the geometry, low-tech manufacturing device.

 The technical result of the invention is to increase the yield, reduce cutting forces, improve geometry, increase manufacturability.

 This is achieved due to the fact that the device is equipped with two extreme edging punches for forming the outer side faces of the parts, located in a row with the punches for cutting, in the matrix there are additional working holes corresponding to the edged punches, the stop is made in the form of a bar located perpendicular to the direction of movement the processed material behind the working holes of the matrix in the course of this movement, made with openings for the passage of the workpiece under the knife for cutting and its working the surface from the centers of the working holes of the matrix at a distance equal to half the distance between the opposite faces of the hexagon, the cutting edge of the knife for cutting is removed from the centers of the working holes of the matrix at a distance equal to the distance between the opposite faces of the hexagon, and the cutting parts of the knife and matrix are made according to the guillotine shear principle .

 The matrix is made detachable from two halves, the width of each of which is equal to the distance between the opposite faces of the hexagon and in each half transverse samples are made corresponding to the halves of the hexagonal working holes of the matrix.

 The drawing shows a device.

 The hexagonal cutting punches 1 are arranged in one row perpendicular to the movement of the tape 2, the opposite faces of the punches are perpendicular to the course of processing, and the distance between their ribs is equal to one face of the hexagon. In the same row are two extreme edged punches 3. The number of punches can be any - even and odd (in the drawing it is 12). The thrust plates 4, the calibration lower knives 5 and the calibration upper knives 6 provide the specified width of the tape 2. The fixed stop 7 is mounted on the lower plate 8, at a distance from the centers of the hexagonal holes in the matrix at half the height of the hexagon, so that the plane of the stop coincides with the plane of the upper faces hexagonal holes.

 The stop 7 has openings, each of which is slightly wider than the diameter of the described hexagon circle for free passage of the blanks formed from the tape 2 between the punches 1, as well as between the punches 1 and 3.

 The split matrix 9 consists of two halves, each of which has a width equal to the height of the hexagon. There are samples in the halves of the matrix. When halves are added, these samples form hex holes in the matrix.

 The cutting knife 10 is mounted on the upper movable plate at a distance of one height from the plane passing through the centers of the hexagonal punches, and interact on the outside of the matrix according to the principle of guillotine shears. The windows 11 in the bottom plate for removing parts chopped off by a knife have a semicircular shape. Columns 12 provide alignment of the punches and die. The clip mounted on the top plate is not marked.

 The device operates as follows. The pitch is equal to one height of the hexagon. The feed tape 2 reaches the thrust plates 4, the top plate, lowering, cuts off the tape in width with calibration knives 5 and 6. When lifting the top plate, a new feed of tape occurs. The end of the tape reaches the stop 7 and abuts against it. The top plate, lowering, presses the tape down.

 Cutting punches 1 cut down hexagonal parts from the tape along an open contour along five faces, at the same time extreme cutting punches 3 form the edges of the tape, cutting along the triangle going to waste, on each side. Due to the same cutting efforts that are spent by punches 1 and 3 on cutting hexagons and triangles, the hexahedral blanks are contoured between the punches and along the edges of the tape, which will pass through the openings of the stop 7 at the next feed and will be cut with a knife 10.

 The cut down hexagons, a ribbon break and triangles fall into the corresponding windows of the matrix and the bottom plate. The third move starts again by lifting the upper plate and feeding the tape to the stop 7.

 Billets pass into the openings of the stop. The emphasis rests on the lower faces of the hexagons cut down at the previous pitch.

 The process is then repeated. From the fourth move is the workflow.

The formula for the total number of hexagonal parts cut down in one working stroke has the form:
V '= n + (n + 1) = 2n + 1, (1) where V' is the number of parts cut down in one working stroke;
n is the number of hexagonal punches;
(n + 1) - the number of parts chopped off with a knife.

 The number of punches cut out is 12, and the number of parts cut in one working stroke, calculated by the formula (1), 25.

Having taken the force in the device for cutting one face of the hexagon in an open circuit equal to m and taking into account the force for cutting four side faces with cut punches along the edges of the tape, the total force for cutting a batch of parts in one move is determined by the formula:
P '= 5n ^. m + (n + 1) m + 4m = (6n + 5) m, (2) where P 'is the total force for cutting all the parts in one move;
m is the force for cutting one face;
n is the number of punching punches;
(n + 1) - the number of parts chopped off with a knife along one face.

=

=

, (3) где

' - среднее усилие для вырубки одной детали,
n - число шестигранных пуансонов;
m - усилие для вырубки одной грани в незамкнутом контуре.The average force required to cut one part is determined by the formula

=

=

, (3) where

'- the average force for cutting one part,
n is the number of hexagonal punches;
m is the force for cutting one face in an open loop.

=

= 3.08 m.With 12 hexagonal punches, the average force will be:

=

= 3.08 m.

Claims (2)

 1. DEVICE FOR STAMPING HEXAGONAL PARTS FROM SHEET RENT, containing a fixed plate, on which there is a stop for fixing the material to be processed, and a die for cutting and pieces with working holes and a cutting edge, and a moving plate, on which are mounted in a row perpendicular to the direction of movement processed material, punches for cutting, each located with its opposite faces perpendicular to the direction of movement of the processed material and placed one from another on the distance between their ribs, equal to the length of the face of the hexagon, and a knife for cutting parts formed between punches, characterized in that it is equipped with two extreme trim punches for forming the outer side faces of the parts, which are located in a row with the punches for cutting, in the matrix are made additional working holes corresponding to the cut-off punches, the stop is made in the form of a bar located perpendicular to the direction of movement of the processed material behind the working holes of the matrix along this movement, made with openings for the passage of blanks under the knife for cutting and located on its working surface from the centers of the working holes of the matrix at a distance equal to half the distance between the opposite faces of the hexagon, the cutting edge of the knife for cutting is located from the centers of the working holes of the matrix at a distance equal to the distance between the opposite faces of the hexagon, and the cutting parts of the knife and matrix are made according to the principle of guillotine shears.  2. The device according to claim 1, characterized in that the matrix is detachable from two halves, the width of each of which is equal to the distance between opposite faces of the hexagon, and transverse samples are made in each half, corresponding to the halves of the hexagonal working holes of the matrix.

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