SU963621A1 - Method of producing die rigging - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to the basis for sheet metal forming.

A known method of manufacturing die tooling by attaching, to the hollow base of a metal lining, made in the shape of product 1.

The rigging, manufactured in a known manner, has low resistance due to the insufficiently rigid attachment of the facing part to the base. The temperature range of use of such equipment is limited.

The aim of the invention is to increase the durability of tooling at elevated working temperatures.

To achieve this goal, in the method of manufacturing die tooling by attaching a metal cladding made according to the shape of the product to the hollow base, the cavities on the base are made from the cladding side, heaters are placed in them, and after hinging the cladding, a hardening filler and heat-resistant it, while the filler and lining are made from materials whose mechanical characteristics are in the ratio

J o5l. eap

 In In

.oBl

bw

Where

strength of the material -. ala facing detail;

bg

10 the ultimate strength of the aggregate material as determined by the compression test;

P is the strain pressure. Metals, for example bronze, fiberglass, for example based on phenolic-silicon organic resin, and polyepoxide compounds, for example epoxy resins, can be used as aggregates.

20

FIG. 1 shows a stamp, a plan view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 2..

The method is as follows.

25 way;

The base is made with cavities into which the electric heaters 2 are installed and the metal piece made according to the shape is fixed.

30 lining 3. The cavities in the base are filled with filler 4, and thermo strengthening is produced.

Example 1 . When stamping titanium sheet alloys in the temperature range of 20-800 ° C, the deformation pressure is 3.8-54 kg / mm. Proceeding from the relation b, BR.AZH 9-4 was chosen as the filler, as the facing part Х18Н10Т.

At the same time, the stamp when stamping OT4-1 alloys can be heated to a temperature of 700 ° C.

To the hollow base of art. 45 was welded by spot plasma welding of a cladding part made of steel H18N10T 1.2 mm thick. The points were set in a staggered order with a step of not more than twenty thicknesses of the welded facing part. Before fixing the facing part into the cavity of the base, tubular electric heaters were placed through the side holes, the heating temperature of which on the surface was lOOOc. The space between the facing piece and the base was poured with bronze BR.A) K9-4 through the holes in the base. After the solidification of bronze, the stamp (filler) was subjected to heat treatment in an electric furnace according to the following conditions: quenching, aging at 320 ° C for 2 hours. After heat treatment, it was 54 kg / mm2.

The device for heating the dies is equipped with thermocouples and automatic temperature control devices. When the dies are heated to the operating temperature, the thermal control system provides short-term disconnection of heating elements. As a result, the temperature of the working area is gradually equalized and maintained n-approximately constant with an accuracy of 5: 25 ° C. The temperature of the heating of the dies on the side of the working surface is 350-400 ° C.

The control and regulation of the temperature of the stamp is carried out automatically using a thermocouple and potentiometer of the type KSP-3.

Example. In the manufacture of stamps for stamping aluminum alloys with EVs of 18-23 kg / mm, ED-6 resin was used as a filler. AMts sheet alloy with a thickness of 1.2 mm was used as a facing material.

To the hollow base from cast aluminum AA19 alloy, fastened with screws and a pulsed arc, the facing part made with rubber on a laminated plastic block was used. The space between the base and the facing part was poured with resin

with subsequent heat treatment in a heating cabinet for hardening at {: 20 ° c. for 2 h and at-t 60 ° for 4 h.

The tests showed almost unlimited durability of dies made by the proposed method. In addition, the method provides a decrease in metal consumption when using epoxy resins and fiberglass in 2-2,5 times, reducing cycle

making stamps, reducing the time of technological preparation of production.

Claims (4)

1. A method of manufacturing die tooling by joining to the base with cavities a metal lining, made in the shape of the product, in that, in order to increase the durability of the tooling, after attaching the lining to the base, in the cavity of the base the filler and heat-resistant it, while the filler and the lining is made of materials, the mechanical characteristics of which are in the ratio  , OBS where g g is the ultimate strength of the material of the facing material; - the strength of the material 40 filling, defined when tested in compression; p is the specific force of deformation. 2. The method according to claim 1, differing from 5 to 5 with the fact that a bronze type metal is used as a filler. 3. A method according to claim 1, characterized in that fiberglass is preferably used as a filler based on a phenolic-silicon organic resin, 4. The method according to claim 1, characterized in that polyoxide compounds of the epoxy type are taken as filler. 55 Sources of information taken into account in the examination 1. USSR author's certificate No. 140027, cl. In 21 D 37/20, 1960 (prototype). .. 60 I + lU  XjAXAJ ./. S-b