A method of manufacturing a sleeve with an outer annular element

 

(57) Abstract:

The invention relates to the field of metal forming and can be used in the manufacture of hollow steel parts with outer ring element. Produce a segment of the workpiece of circular cross section, align its ends, and then by planting get on the workpiece flange. Squeeze the inner cavity to form the outer annular element, then punch the hole. All operations carried out on the punching positions. The formation of the outer annular element and punching holes carried out on a separate stamping positions. The hole punch on the last stamping position. The result is improved quality of products. 1 Il.

The invention relates to the processing of metals by pressure, in particular to the technology of cold upsetting, and can be used in the manufacture of hollow steel parts with outer ring element.

A known method of manufacturing a nut with an external element in the form of nodules of various shapes, including a segment of the workpiece of circular cross section, and the successive formation of the polyhedron at 2 and 3 positions, running on 4 positions Narodnoye known method are uneven filling of the outer contour of the element, leading to a significant deterioration in the quality of parts, and the low resistance of the tool in this position.

A known method of manufacturing a sealing nut with an outer annular element of the material - aluminium, where the cut workpiece of circular cross section, in the first position pre rebuff flange, the next position completely rebuff flange with simultaneous extrusion of the inner cavity and forming an outer annular element on the end, and in subsequent positions form the outer polyhedron and punch a hole (UK patent 2030483, CL 21 To 1/70).

This method has the following disadvantages.

1. Method of forming blanks not applicable to stainless steel products, as significant deformation occurring at the second and third positions, result in high stresses on the tool and to its low resistance.

2. The complex shape of the workpiece in the second position requires precise tuning of the instrument and does not provide stability of shape variation in the landing.

Closest to the present invention is a method of manufacturing a sleeve with an outer annular element including a segment of the workpiece of circular cross section, you the outer annular element and punching holes (Russia, p. 2122917, CL 21 Q1/00).

The disadvantage of this method is the complexity of the design tool and its adjustment on the last position with the simultaneous execution of two operations: punching holes and forming the outer ring element. All this leads to insufficient stability of the landing process and the deterioration of product quality.

The invention solves the problem of improving the quality of products by increasing the stability of the stamping process by simplifying the setup and design farmerswho tool.

To achieve the technical result in the method, including the segment of the workpiece of circular cross section, the alignment of its ends, getting on the workpiece flange, squeezing the internal cavity, the formation of the outer annular element and punching holes, which carry on the stamping positions, while punching the holes made on the last stamping position, according to the invention the flange is produced by planting, and the formation of the external annular element is performed after the landing, with the above-mentioned formation of the outer annular element and punching holes carried out on a separate stamping on is to simplify the design tool and its setting in the landing, ensuring process stability and high quality products.

The invention is illustrated in the drawing.

The method is as follows.

The sleeve with an outer annular element is made by cold-landing machine MG. From riot cut steel 20 gauge piece and the first punching position to produce alignment of the ends with the design on one of the radius with a small conical recess and a tapered recess on the other. Then the workpiece is transferred to the second position rotated 180oto make the landing flange sleeve with a clearance chamfer on the end surfaces.

Next, the workpiece is transferred in parallel to the third position and shape of the outer ring element on the end face of the bushing flange. Then the workpiece is transferred in parallel to the fourth position, where the squeeze inner cavity at the end of the larger outer diameter. At the last position of the workpiece is transferred in parallel and punch the hole.

The application of the proposed method of forming provides a simple construction of the tool and its configuration, guarantees high quality products.

The method of manufacturing the its ends, getting on the workpiece flange, squeezing the internal cavity, the formation of the outer annular element and punching holes, which carry on the stamping positions, while punching the holes made on the last stamping position, characterized in that the flange is produced by planting, and the formation of the external annular element is performed after the landing, with the above-mentioned formation of the outer annular element and punching holes carried out on a separate stamping positions.

 

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FIELD: plastic working of metals in different branches of industry.

SUBSTANCE: apparatus includes supporting plate and housing with openings and duct. Punch, upper and lower stops are mounted in housing. Said stops may be in contact with blank by their flat notched surface. Movable lower stop is arranged in openings of housing and on supporting plate; it engages with said plate by its smooth surface. Hydraulic cylinder joined by its rod with lower stop is mounted on supporting plate. Upper stop is in the form of cylinder mounted in housing in such a way that it restricts together with punch inner cylindrical cavity of hydraulic system providing motion of lower stop. Said hydraulic system also includes duct of housing and hydraulic cylinder.

EFFECT: enlarged manufacturing possibilities of apparatus due to increased range of changing relation of shear deformation to compression deformation of blank.

2 dwg

FIELD: plastic metal working, possibly forging variable cross section parts by extrusion in hydraulic presses with movable container.

SUBSTANCE: method comprises steps of feeding heated blank to container; pressing out blank in container by means of pressure pad and extruding part of blank to die of die set; forming forging having constant cross section part and thickened part that is formed after upsetting remaining portion of blank; placing part of die set in container according to condition of joining their planes. Upsetting of remaining portion of blank for forming thickened part of forging is realized in cavity between joined planes of die set unit and container. Said cavity is formed due to moving die set unit relative to container before forming thickened part of forging. Upsetting operation is realized due to simultaneous motion of pressure pad and container.

EFFECT: possibility for making forging with complex outer and inner configurations, simplified assortment of technological tools, enhanced quality of forging.

2 cl, 9 dwg

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