RU164760U1 - STAMP FOR HOT COMBINED EXPLOSION OF A CYLINDRICAL HOLLOW PRODUCT WITH A FLANGE ON A HYDRAULIC PRESS FOR DOUBLE ACTION - Google Patents

Abstract

A stamp for hot combined extrusion of a cylindrical hollow product with a flange on a double-acting hydraulic press, comprising a punch and a matrix consisting of upper and lower half-matrices mated on the outer and inner cylindrical surfaces to form a cavity for forming the flange of the cylindrical product, characterized in the fact that it is equipped with four power cylinders with cylindrical rods, the matrix is made with two parallel channels, the axis which are located in the same plane perpendicular to the direction of mutual movement of the punch and the matrix, and coincide with the tangents to the conjugate cylindrical surfaces of the upper and lower half-matrices, and the rods of the power cylinders are made with beveled ends on the plane and are placed in pairs at both ends in the matrix channels with a gap and with the location of the beveled along the plane of the ends at an acute angle to the axis of the cylindrical surfaces of the semi-matrices and have the possibility of force interaction in the opposite direction with the provision agruzheniya top and bottom jaws towards each other in the axial and radial directions.

Description

 The utility model relates to the field of engineering, in particular, to the processing of metals by pressure and can be used to obtain products such as large-sized parts with a flange, for example, half-shell ball valves.

A known method of manufacturing large-sized half-bodies of ball valves with flanges (RF patent No. 2527518 C1, publ. 09/10/2014). In the description and graphic materials for the patent, there is a stamp for hot combined extrusion of a cylindrical forgings with a flange on a double-acting hydraulic press, in which a punch is attached to the inner slider, which exerts a force on the steel pipe billet heated to 1100-1200 ° C, and on the outer slider attached upper matrix.

на матрицу в зоне деформирования фланцевой части поковки действуют отжимающие силы, по величине большие, чем сила, развиваемая наружным ползуном пресса, следствием чего является низкое качество получаемого изделия.The disadvantage of the design of the stamp for combined extrusion mounted on a double-acting hydraulic press does not provide an additional possibility of holding the matrix in the lowest position when with large diameters of the flange

the matrix in the deformation zone of the flange part of the forgings is affected by pressing forces, larger in magnitude than the force developed by the external press slider, which results in low quality of the obtained product.

The closest in the set of essential features - the prototype - is a stamp for hot combined extrusion of a cylindrical hollow product with a flange on a double-action hydraulic press, containing a punch and a matrix consisting of upper and lower half-matrices mated on the outer and inner cylindrical surfaces with the formation of a cavity for forming a flange of a cylindrical product (RF Patent No. 2125497 C1, publ. 01/27/1999).

In this design of the stamp, the upper half-matrix is held pressed to the lower half-matrix by tightening bolts or studs, involving the disclosure of the matrix — removing the tightening bolts or studs — by manual personnel.

The disadvantages of the prototype include the limited technological capabilities of the stamp due to the impossibility of automating the disclosure of the matrix to remove the machined part, which determines the constructive impossibility of its integration into a partially or fully automated production cycle.

The objective of the utility model is to create a stamp for hot combined extrusion of a cylindrical product with a flange on a double-action hydraulic press, suitable for use in a partially or fully automated production cycle.

The technical result is the expansion of the technological capabilities of the stamp.

The problem is solved, and the claimed technical result is achieved by the fact that the stamp for hot combined extrusion of a cylindrical hollow product with a flange on a double-acting hydraulic press, containing a punch and a matrix consisting of upper and lower half-matrices conjugated along the outer and inner cylindrical surfaces with the formation of a cavity for forming a flange of a cylindrical product, equipped with four power cylinders with cylindrical currents, the matrix is made with two parallel channels, the axes of which are located in the same plane, perpendicular to the direction of mutual movement of the punch and the matrix, and coincide with the tangents to the conjugate cylindrical surfaces of the upper and lower half-matrices, and the rods of the power cylinders are made with beveled ends along the plane and in pairs placed at both ends in the channels of the matrix with a gap and with the location of the beveled along the plane of the ends at an acute angle to the axis of the cylindrical surfaces of the semi-matrices and have the possibility of forces new interaction in the opposite direction with the provision of loading the upper and lower half-matrices towards each other in the axial and radial directions.

The utility model is illustrated by images on which are shown:

in FIG. 1 - sectional stamp, side view;

in FIG. 2 is a section AA in FIG. one;

in FIG. 3 is a section BB in FIG. one;

in FIG. 4 is a view B in FIG. one.

The designations in the images shown correspond to:

1 - original cylindrical billet;

2 - a punch;

3 - finished product;

4 - upper semi-matrix;

5 - bandage;

6 - stock;

7 - lower half matrix;

8 - a cylindrical channel;

9 - guides;

10 - hydraulic cylinders (power cylinders);

11 - ejectors;

12 - the outer cylindrical surface of the upper half-matrix;

13 - inner cylindrical surface of the lower half-matrix;

14 - the internal cavity of the matrix;

15 - flange;

16 - rod end;

17 - the inner part of the lower half-matrix 7.

According to a utility model, in a die intended for hot combined extrusion of a cylindrical product 3 with a flange 15 on a double-acting hydraulic press, including a punch 2 arranged with the possibility of oncoming movement and a matrix consisting of upper 4 and lower 7 half-dies conjugated respectively on the outer 12 and inner 13 to cylindrical surfaces with the formation of an internal cavity 14 for forming the flange 15, the matrix is equipped with two parallel cylindrical channels 8, made in the plane perpendicular to the direction of mutual movement of the punch 2 and the matrix, so that the axis of the channels 8 coincide with the tangent to the conjugate cylindrical surfaces of the upper 4 and lower 7 (in Fig. 1 - made of two parts: the actual matrix 7 and its inner part 17 - technological considerations) half-matrix, and the stamp is equipped with four power cylinders 10 with cylindrical rods 6 placed with a gap in pairs from both ends in each of the channels 8 with the possibility of mutual force interaction in the opposite direction, the ends 16 of each pair of rods are beveled (at an angle α, FIG. 4) in a plane located at an acute angle β (in Fig. 1) to the axis of the cylindrical surfaces of the semi-matrices.

In the proposed stamp design, the rods are moved using hydraulic cylinders that are easily integrated into the automated cycle by providing them with control from a numerical control system (CNC), as is the case, for example, in presses with CNC in the RVV series (http://www.metallostanki.ru /product-764.html). The use of four power cylinders with rods that perform the function of wedges allows you to automate the process of mutual fixation of the upper and lower half-matrices in order to prevent their divergence under the action of spacer forces from the metal extruded into the cavity between them during the formation of the flange.

In this case, the placement of the rods of the power cylinders with a gap in pairs from both ends in each channel with the possibility of mutual force interaction in the opposite direction allows providing loading of the upper and lower half-matrices directed in the desired direction (in the absence of such a gap, loading would be possible only in the radial direction).

The execution of the ends of each pair of rods beveled (at an angle α) in a plane located at an acute angle (β) to the axis of the cylindrical surfaces of the half-matrices with the possibility of force interaction in the opposite direction with the loading of the upper and lower half-matrices towards each other in the axial and radial directions, allows to compensate for the effect of the spacer forces from the metal extruded into the cavity between them during the formation of the flange. In this case, the torques from the forces R generated on each pair of rods acting on the upper and lower half-matrices are mutually compensated, there is practically no additional load on the stamp elements.

The work of the stamp is carried out in the following sequence.

First, the steel pipe billet heated to the required temperature of 1150-1200 ° C is installed in the matrix, then the hydraulic cylinders 10 are turned on, moving the rods 6 towards each other. In this case, the guides 9 provide coupling of the upper half-matrix 4 and the lower half-matrix 7. Then, the working stroke of the internal press slider is turned on (not shown) with a punch 2, which extrudes the metal, forming the cylindrical part of the forging and radially filling the cavity of the matrix with metal with the formation of the flange. In this case, the cavity of the flange is first filled, and then the cavity of the cylinder due to the fact that the degree of deformation in the cylinder cavity is much higher than the degree of deformation in the cavity of the flange. It is known that the higher the degree of deformation, the greater the resistance to metal flow.

After completion of the shaping, the punch is raised to its highest position and the hydraulic cylinders 10 include the movement of the rods 6 to their original position. The upper half-matrix 4 for the bandage 5 rises upward with an external slider (not shown). In this case, the finished product 3 is held in the lower half-matrix 7 due to the slope along its vertical wall with an angle γ = 1.5 ° -2 °. Under the action of the ejectors 11, the product is removed from the lower half-matrix and removed from the stamp.

From the presented description it follows that the control of all elements of the stamp, including power cylinders (hydraulic cylinders), in contrast to the prototype, is possible in any mode, including automated.

Therefore, the task of the utility model — the creation of a stamp for hot combined extrusion of a cylindrical product with a flange on a double-action hydraulic press suitable for use in a partially or fully automated production cycle — has been solved, and the claimed technical result — the expansion of the technological capabilities of the stamp — has been achieved.

Thus, the above information indicates the fulfillment of the following set of conditions when using the claimed technical solution:

- an object embodying the claimed technical solution, when implemented, relates to the field of mechanical engineering, in particular, to metal forming and can be used to obtain products such as large-sized parts with a flange, for example, half-shells of ball valves;

- for the claimed object in the form described in the formula, the possibility of its implementation using the methods and methods described above or known from the prior art on the priority date is confirmed;

- the object embodying the claimed technical solution, when implemented, is able to ensure the achievement of the technical result perceived by the applicant.

Therefore, the claimed object meets the criteria of patentability "novelty" and "industrial applicability" under applicable law.

Claims (1)

A stamp for hot combined extrusion of a cylindrical hollow product with a flange on a double-acting hydraulic press, comprising a punch and a matrix consisting of upper and lower half-matrices mated on the outer and inner cylindrical surfaces to form a cavity for forming the flange of the cylindrical product, characterized in the fact that it is equipped with four power cylinders with cylindrical rods, the matrix is made with two parallel channels, the axis which are located in the same plane perpendicular to the direction of mutual movement of the punch and the matrix, and coincide with the tangents to the conjugate cylindrical surfaces of the upper and lower half-matrices, and the rods of the power cylinders are made with beveled ends on the plane and are placed in pairs at both ends in the matrix channels with a gap and with the location of the beveled along the plane of the ends at an acute angle to the axis of the cylindrical surfaces of the semi-matrices and have the possibility of force interaction in the opposite direction with agruzheniya upper and lower jaws towards each other in the axial and radial directions.

Images