RU2353468C2 - Punching method of liquid metal of cutters on die casting machine with horizontal chamber of pressing and facility for its implementation - Google Patents

Abstract

FIELD: foundry practice.

SUBSTANCE: invention relates to foundry field. Method includes pouring of ladle portion of liquid metal into compression box, its insertion into form, form removing with cast and with butt-end from the compression box by press plunger. Form is manufactured by punching method from liquid metal in the form of fast-change forming inserts on facility, containing press-form with movable and immovable half-mold, compression box with stepped by length internal surface and replaceable brass. Replaceable brass is implemented in the form of cylindrical rod with vertical pass into diametral longitudinal plane with relief, forming mold cavity. Replaceable brass is manufactured from powder of molybdenum sintered and pressed. Simultaneously with manufacturing in the compression box it is implemented tempering of cast cutter. In the capacity of hardening compound it is used material of forming insert.

EFFECT: it is achieved improvement of cast and process efficiency.

5 cl, 7 dwg, 2 ex

Description

The invention relates to foundry and includes two objects of the invention, namely, a method of stamping liquid metal from a cutting tool on an injection molding machine with a horizontal pressing chamber and a device for its implementation, which are combined in one application and connected by a common unified inventive concept.

The invention can be used in methods and devices for stamping liquid metal cutting tools on a die casting machine with a horizontal pressing chamber.

A known method of injection molding and a device for its implementation. The method includes pouring a metered volume of molten metal through an opening in the pressing cylinder, filling the mold cavity with molten metal, compressing the metal, fixing the pressing plunger during technological exposure to form a crust of crystallized metal on the surface of the casting and holding the casting under pressure, characterized in that the pressure on the casting after technological exposure, impose by introducing a pressing plunger under the crystallized crust inside the metal in the chamber ssovki in pulse mode operating fluid pressure modulation in the hydraulic cylinder associated with a pressing plunger at a variable frequency until the end of crystallization, thus regulating the pulse frequency modulation is performed by changing the duration of the program ON and OFF states of solenoid valves. The injection molding device comprises a releasable mold, a pressing mechanism with a pressing plunger and a pressing cylinder located in the fixed plate of the casting machine, and in the fixed part of the mold, the second part of which is placed on the movable plate of the casting machine, equipped with a hydraulic drive and a control system, the cylinder pressing from the side facing the casting is equipped with a pressure chamber, characterized in that the pressure chamber is made in the form of a truncated cone with a taper angle that ensures the press residue from the pressure chamber, with a smaller base diameter greater than the diameter of the pressing plunger by two thicknesses of the metal crust hardened during technological exposure, with a volume of 0.15 of the total metal volume (RF patent No. 2252108, class B22D 17/00, Declared on 05.08.2002, published by BIPM No. 14 of 05.20.2005) [1].

The method and device are intended for castings of large mass and are unacceptable for small castings of a cutting tool.

However, the closest analogue, in our opinion, is a method of stamping liquid metal from a cutting tool on a die-casting machine with a horizontal pressing chamber, adopted as a prototype, which allows two casting windows to combine casting of castings in the same pressing chamber with stamping from a molten metal mold, in which, after hardening and cooling to the required temperature, stamping of the castings is carried out, while after the hardening of the casting and its separation from the mold go yachuyu mold fed to a furnace for re-refining and manufacturing a new mold from the molten metal. The mold can be made of aluminum or copper alloy, and castings of more refractory alloys, including steel (ed. St. USSR No. 605680, class B22D 17/10, decl. 12.02.75, publ. 05.05.78, , BI No. 17) [2].

Among the disadvantages of this technical solution, it is worth noting the inability to control the quality of the molded mold, on which the subsequent receipt of a high-quality casting depends on it.

Massive uncooled aluminum molds are known for making castings. The maximum temperature of an uncooled chill mold should not exceed 600K (327 ° С). The use of massive uncooled chill molds is justified in the manufacture of small castings, as well as in individual small-scale production. Aluminum molds with anodized work surfaces are used in casting ferrous and non-ferrous alloys. Unprocessed aluminum molds are especially effective, which are 12-15 times cheaper than machined ones (A. Veinik, Thermodynamics of a mold. M., Mechanical Engineering, 1968, pp. 233-236) [3].

Among the disadvantages of the device, it is necessary to note the impossibility of creating pressure on the molten metal similarly to stamping from liquid metal, low productivity in comparison with injection molding machines, and the need for anodizing the chill mold.

A device is known for pressing metal on an injection molding machine with a horizontal pressing chamber, comprising a mold in the form of interchangeable inserts installed in the glass of the pressing chamber, the inner surface of the pressing chamber being made stepwise, the mold inserts being installed in steps larger diametric size (ed. St. USSR No. 499961, class B22D 17/10, decl. 12.03.1974, publ. 01.25.1976, BI No. 3) [4].

Among the disadvantages of the device, it should be noted a rapid decrease in the surface cleanliness of the liners, and therefore, castings.

The closest analogue of the device, adopted by the authors as a prototype, is a device for stamping from liquid metal a tail cutting tool on an injection molding machine with a horizontal pressing chamber, containing a mold in the form of a movable and fixed half-mold, a pressing chamber with a stepped inner surface, interchangeable inserts with a forming cavity installed in the pressing chamber in steps of a larger diameter, while the cavity in interchangeable inserts is made through for the forming the tail part of the tool, and the mold is equipped with an additional liner fixed in a movable half-mold and having a relief cavity on the end for shaping the cutting part of the tool, and in the upper part of its cylindrical surface a ventilation duct in communication with the relief cavity and the mold connector plane ; the additional insert is made of copper or an alloy based on it; the additional insert is made of an alloy based on iron or the additional insert is made bimetallic, while the forming part of the insert is made of an alloy based on iron, and the rest is made of copper or an alloy based on it (RF patent No. 2075368, CL B22D 18/02, Declared September 25, 1992, published March 20, 1997, BI No. 8) [5].

Among the disadvantages of the device, it should be noted the insufficient durability of the additional liner, which leads to its frequent replacement, and therefore to downtime of the injection molding machine.

A common disadvantage of the known methods and devices is the low quality (roughness and accuracy) of the cast cutting tool and the large amount of its machining.

Molds, as a rule, are installed permanently, are fastened with fasteners to injection molding machines and are operated until they are completely worn out, i.e. to the appearance of cracks and a grid of height on the forming surfaces. Under the durability of the mold refers to the number of cycles of heat transfer, or the number of castings removed from the mold, or the number of press-fit into the mold, subject to a certain roughness (surface cleanliness). The main thing is to obtain castings of a certain accuracy and surface roughness. If the roughness of the working cavity of the mold is 40 μm (R _z 40) according to GOST 2789-73, then castings with a roughness of 2.5 μm or (R _z 2.5) cannot be obtained. In the manufacture of castings of steel 20L in liners of steel 3X2B8F, the surface roughness of castings of iron-based alloys after 500 cycles of heat exchange decreases from grade 5-6 R _z 20 to R _z 40-R _z 80 (see I. Goryunov [ 6, p. 26, table 25]).

Pure copper is a very heat-resistant material. During the development of steel casting under pressure, more than 100 molds with inserts made of pure copper were manufactured. The resistance of such inserts was higher than that of 3X2B8F steel, but a large breakdown appeared on the castings due to crushing of the molds. In some cases where crushing cannot occur or the flake is removed during machining, pure copper may be used. I.I. Goryunov, together with other enterprises, tested more than 100 different copper-based alloys, of which three are recommended for use when casting steel under pressure as materials for liners. Alloy MHTSV. Due to the high thermal conductivity of the alloy, the contact temperature during casting decreases to 600 ° C instead of 950-1000 ° C for 3Kh2V8F steel. Alloy durability is checked when casting steel under pressure and liquid stamping. The resistance of the alloy is 2.5-3 times higher than the resistance of 3X2V8F steel. Alloy ICD. It is advisable to use cobalt-beryllium bronze in the manufacture of castings from steels of various grades of a simple configuration weighing up to 500 g. Mold inserts can be made by cold extrusion, followed by quenching of the workpiece from 980 ° C in water. After this, aging is performed. In this case, the working cavity is obtained with a surface finish of 0.63 μm. The liners have a high resistance [6, p.197-201].

In the same place, p.225, Table 217 provides information on the resistance of materials in the manufacture of the "cap" steel part.

Indicator
casting
"cap" Mold Liner Materials Note ZX2V8F MHCV ICD BM1 Number
cycles
heat exchange
presses
steel 200-400 810-1100 1800-3000 10,000 Steel 20L GOST 1050-74

The best materials for steel injection molding include molybdenum and copper based alloys.

Stabilization of the quality of steel casting, namely surface cleanliness and accuracy, is achieved if molds are prefabricated in the form of quick-change liners, which, after hardening of the casting with the press residue, are pushed out together with the casting by the pressing plunger, and after each pushing of the hardened casting by the pressing plunger and returning the pressing plunger to its original position in the pressing chamber serves another set of quick-change mold inserts, pre-made by stamping from idkogo molybdenum metal inserts.

Consider the table. 25 [6].

The purity class for castings from iron-based alloys with 5 ... 6 GOST 2789-73 drops to 3-4 grades at 500 press-fit into the mold, and at 1000 press-fit - to 2 ... 3 grades.

In the manufacture of mold inserts from molybdenum alloy VM1 with HB255 5 ... 6, the cleanliness class of steel castings is maintained up to 3000 press-fit into the mold.

Special studies of various materials were conducted to determine their applicability in the manufacture of brass injection molds [7]. Studies have shown that ceramics are too susceptible to destruction from heat and mechanical shock. Graphite-based materials have insufficient resistance to the corrosive effects of liquid brass. Alloys based on tantalum and niobium have low thermal conductivity and are also too expensive. A mold made of GE 22 material (a metal powder made of pure molybdenum, which is then sintered and pressed) withstood 36,000 fillings, while the surface quality deteriorated slightly, but edge chipping was noted. 45,000 castings were obtained in the Mallory 3950 alloy form (tungsten powder with the addition of 3.5% nickel and 1.5% iron) and the surface of the mold remained in good condition.

Hardening under pressure - liquid stamping - Press Casting - along with injection molding is the most advanced technology for producing castings in metal molds. The essence of the process lies in the combination of casting and plastic deformation processes, with pressure acting on the metal during the entire solidification time of the casting. With increasing pressure, the solidification time is reduced, and the casting quality improves. For example, the tensile strength of cast iron samples hardened under pressure is higher than that of castings hardened under normal conditions. This increase in strength is caused by grinding of the structure and increased number of graphite nodules and their degree of compactness _{(Pilarik S., Konecny L. * Slevarenstvi} , 1979, 27, № _^3/4, 111-132, EI crowd 12.11.1980, №42, p. 1-9) [8].

External pressure of 15 kg / mm ² affects the structure and mechanical properties of cast iron similarly to magnesium modification (Gulyaev BB, Lipnitsky AM, Obolentsev FD Special casting methods. L., “Mechanical Engineering”, 1971, p.14) [9].

In the manufacture of a cast cutting tool, reducing the solidification time of the casting is especially important, while during injection molding, the lag of crystallization of the press residue should be such that the phase decrease in the volume of the casting is constantly compensated by the liquid from the press residue. The phase transformations in the metal of the press residue should occur last, when they have already completed in the casting. If you make a cutting tool by casting without subsequent heat treatment or only with tempering, then the problem inherent in molybdenum high-speed steels, namely a narrow range of hardening temperatures (Revis I.A., Lebedev T.A., Structure and property of cast cutting tools. .2-е. L., "Mechanical Engineering", 1972, p.63-64 [10].

In the given experiment, cast tools were used without quenching after three tempering. Resistance was equal to 156% of the forged resistance.

Cutters made of molybdenum steel have the highest productivity (ibid., P. 11) [10]. Due to the increase in the cooling rate, alloying of the solid solution is increased, the cutting properties of the cast tool are improved (Goryunov II. Casting of tools in metal molds. Collection of reports by VNITOMASH MO. Cast deposited tool. M., Mashgiz, 1951, pp. 69-79) [eleven].

In the manufacture of a cast cutting tool, it is possible to create conditions δ → γ of phase transformations in the casting, in which they would be ahead of phase transformations in the metal of the press residue, while it becomes possible to exclude subsequent annealing and hardening operations provided that the proper solidification and subsequent cooling cooling rates to get quenched from a liquid state. Obtaining the necessary cooling rate is possible:

- by controlling the parameters of those. process

- through the use of appropriate materials for molds;

- due to changes in the cross section of the casting.

With the accelerated removal of quick-change mold-forming inserts together with casting, a large amount of heat is transferred outside the injection molding machine, which makes it possible to reduce the weight of the machine and increase its compactness (AS USSR No. 515583, class B22D 17/10, application 05.08. 1974, publ. 30.05.76, BI No. 20) [12].

Through the use of quick-change mold-forming inserts, the productivity of injection molding machines manufactured previously with careful quality control before installation in the pressing chamber is increased.

In the manufacture of a cutting tool from forged billets or rolled products, considerable means have to be spent on machining. At machine-building enterprises, up to 15-20% of all machines are engaged in the manufacture of tools for their own needs [6].

The problem to be solved:

- reduction in the volume of machining of the tool;

- improving the quality (roughness and accuracy) of the cast cutting tool.

The solution to the problem of improving the quality of the molded tool and reducing the volume of machining is achieved by the fact that quick-change mold-forming inserts are preliminarily made by stamping from liquid metal on a die-casting machine with a horizontal pressing chamber in a molybdenum mold, after which the obtained inserts are transferred for the manufacture of molded cutting tool, and after each pushing of the hardened casting of the cutting tool and the return of the pressing plunger to its original position in the pressing chamber is supplied with another set of quick-change mold-forming inserts, the cycle of operations for stamping the cast cutting tool is repeated, while after separating the casting from the inserts outside the injection molding machine, reusable inserts, for example made of copper or alloys based on it, are returned to the injection molding machine for repeated stamping of the cutting tool in them, and disposable inserts made, for example, of aluminum alloy, are transferred to remelting for manufacturing new molded forming inserts, moreover, simultaneously with the stamping of a tool made of liquid metal in the pressing chamber, the casting tool is quenched, while the material of forming inserts is used in the pressing chamber as a quenching medium, and the glass of the pressing chamber for manufacturing quick-change forming inserts is unified with the pressing chamber for stamping cast cutting tools and made of molybdenum powder, sintered and pressed. The manufacture of quick-change mold-forming inserts and the subsequent manufacture of cast cutting tools are carried out on the same injection molding machine with a horizontal pressing chamber using a standardized pressing chamber glass.

The above-mentioned method for manufacturing a cast tool is implemented using a device for stamping from liquid metal quick-change mold-forming inserts on an injection molding machine with a horizontal pressing chamber containing a mold in the form of a movable and fixed half-molds, a pressing chamber with an inner surface that is stepped along the length, a replaceable liner, fixed in a movable half-mold and installed with the possibility of its introduction into the pressing chamber into a step of a larger diameter, while the replaceable insert nen in the form of a cylindrical rod with a vertical transition into a diametrical longitudinal plane with a convex relief on it with a height equal to half the thickness of the casting of the tool, while the replaceable liner is made of molybdenum powder, sintered and pressed, and on the diametrical longitudinal plane from the side of the mold the removable rod is made a flat protrusion with a thickness equal to half the height of the ventilation channel in the plane of the connector quick-change forming inserts.

These characteristics distinguish the claimed objects of the invention from the selected prototypes, and therefore the proposed technical solution "method" and "device" have novelty.

The authors are not aware of technical solutions with the characteristics indicated in the claims aimed at solving the same problems as in the method and device claimed as an invention, i.e. reducing the volume of machining and improving the quality of casting - roughness and accuracy of the cast cutting tool to a level of 5 ... 6 cleanliness class (R _z 20 - 2.5 microns) GOST 2.309-73 and, accordingly, accuracy class. Thus, the proposed technical solution meets the requirements of the criterion of materiality of differences.

The invention is illustrated by drawings, which successively reflects the method of stamping of liquid metal cutting tools on a die casting machine with a horizontal pressing chamber and a device for its implementation.

Figure 1. The supply of quick-change form-forming mold inserts into the pressing chamber.

Figure 2. Locking the pressing chamber with a movable half-mold, pouring a dosed portion of liquid metal into the pressing chamber.

Figure 3. Pressing the metal into quick-change mold-forming inserts, holding in the mold for hardening and heat treatment of the casting.

Figure 4. Opening the pressing chamber, pushing the quick-change mold-forming inserts together with the casting and the press residue from the pressing chamber by the press plunger, returning the press plunger to its original position (see FIG. 1), separating the cast from the quick-change mold-forming liners outside the machine.

Figure 5. Casting a drill bit with a press residue after separating one of two quick-change mold-forming mold inserts.

6. A device for stamping from liquid metal quick-change form-forming inserts on an injection molding machine with a horizontal pressing chamber.

7. A device for stamping from liquid metal quick-change form-forming inserts on an injection molding machine with a horizontal pressing chamber; Node I (see Fig.6).

A device for stamping from liquid metal quick-change forming inserts on an injection molding machine with a horizontal pressing chamber comprises a mold in the form of a movable 1 and fixed 2 half-molds, a pressing chamber 3 with a stepped inner surface 4 and 5, a removable insert 6 in the form of a cylindrical rod with a vertical transition 7 into a diametrical longitudinal plane 8 with a convex relief 9 on it, equal in height to half the thickness of the casting. The removable insert 6 is fixed in the movable half-mold 1 with a shoulder 10. In the pressing chamber 3, a filling window 11 is made, and in the movable half-mold 1, a ventilation channel 12 in the connector of the half-molds 1-2. The movable half-mold 1 is attached to the movable mold holder 13 of the injection molding machine. FIG. 6 shows a casting 14 with a press residue 15 and a pressing plunger 16 at the time of stamping of liquid metal of a quick change mold-forming insert on an injection molding machine with a horizontal pressing chamber. 7 shows a flat protrusion 17, equal in height to half of the ventilation channel in the connector of the quick change forming insert intended for stamping from molten metal of a cast cutting tool.

The operation of the device for stamping from liquid metal quick-change form-forming inserts on a injection molding machine with a horizontal pressing chamber is as follows. When closing the mold 1-2, the movable half-mold 1 moves to the right and closes with the fixed half-mold 2, while a removable insert 6 with a shoulder 10 and with a vertical transition 7 into the diametrical longitudinal plane 8 with a convex relief 9 is introduced into the steps 5 of the larger diametric size of the chamber 3 presses. After pouring through the pouring window 11 a metered portion of the molten metal into the pressing chamber 3 into the stage 4, the molten metal is stamped by the pressing plunger 16, while air and gases are discharged through the ventilation duct 12. After the curing time 14 has been hardened, the casting 14 with the press residue 15 is opened molds 1-2, the movable half-mold 1, mounted on the mold holder 13, is taken to the left, the casting 14 with the press residue 15 is pushed by the pressing plunger 16 from the pressing chamber 3. After separating the casting with the impression of a convex relief 9, equal in depth to half the thickness of the casting, and the imprint of the protrusion 17 with a depth equal to half the height of the ventilation channel in the plane of the connector of the quick-change mold-forming insert, mating with the second quick-change mold-forming insert, and also after cutting the press residue 15 quick-change inserts are transferred complete at the rate of 2 pcs. for each press fitting on a die casting machine for stamping molten cutting tools from molten metal.

After cleaning and blowing the mold, the device is ready for a second cycle of liquid metal stamping operations of a quick-change mold-forming insert.

Example 1

Casting in aluminum inserts of a feather drill for holes. ⌀25 mm from molybdenum high-speed steel of the following composition,%: C 1.23; W 2.00; Cr 4.00; V 2.00; Mo 4.00:

_with m = 40 g, the mass of the casting without residue press

γ _s = 7.87 g / cm ² , specific weight of steel

, теплоемкость стали

heat capacity of steel

t ₁ = 1560 ° С, steel temperature in the pressing chamber

t ₂ = 560 ° C, the temperature of the steel casting when separating the liners

Δt = 1000 ° C

d = 40 mm, diameter of the pressing chamber

D = 50 mm, the largest diameter of the pressing chamber

L = 160 mm, press chamber length D 50 mm

l = 150 mm, cast length

, теплоемкость алюминия

heat capacity of aluminum

Q _pls = 64 kcal / kg, latent heat of fusion of steel

Q _c - the amount of heat in 1 kg of steel when cooling from t ₁ = 1560 ° C to t ₂ = 560 ° C

Q _c = c _c · Δt · m _c + Q _pls = 0.11 · 1000 + 64 = 174 kcal

Press balance of steel ⌀40; h = 25 mm

Area f = 0.785d ² = 0.78542 = 12.56 cm ²

The amount of press residue

U = f · h = 12.56 · 2.5 = 31.4 cm ³

The mass of the press residue

m = γ _{ave a} · U = 7,87 · 31,4 = 247 g

M _s - mass casting with a press residue

M _s = m _s + m _ol = 40 + 247 = 287 g

The amount of heat contained in the steel casting with a press residue

Weight of two aluminum half-cylinders

;

;

The temperature of two aluminum liners when separating them from the casting

those. below the limit (327 ° C) recommended for aluminum chill mold. Given the heat loss in the pressing chamber - 10%

T _al2 = t _al · 0.9 = 272 · 0.9 = 244.8 ° C.

Example 2

Casting the same tool into copper inserts:

γ _m = 8.93 g / cm ³ specific mark M1 by weight copper, GOST 859-78

C _m = 0.091 kcal / kg heat capacity of copper grade M1

M _m - the mass of two half-cylinders of forming inserts minus the volume of the casting

M _m = (0.785D ² LV _exc. ) Γ _m = (0.785 · 5 ² · 16-5) 8.93 = 2.76 kg.

The temperature of the copper liners when separating them from the casting

.

.

taking into account the heat loss of 10% in the pressing chamber

t _M = 198.6 · 0.9 = 178.8 ° C

*cm. I.A. Revis [10] p. 63-64, tab. 18.

The proposed technical solution differs from the known ones in that instead of stamping from liquid tool steels of a cutting tool on an injection molding machine with a horizontal pressing chamber in molybdenum molds, it is proposed to stamp quick-change mold-forming inserts of reusable copper or alloys based on it or disposable inserts from aluminum alloys for stamping in them from a liquid alloy cutting tool, as a result of this

- improves the quality (purity, accuracy) of castings from tool alloys;

- reduced the volume of machining;

- increases the durability of the molds in the manufacture of quick-change mold-forming inserts, and ultimately, the number of castings of high quality tool;

- increases the productivity of the manufacturing process of the cast tool, since the separation of castings from quick-change liners is carried out outside the injection molding machine.

It was previously noted that a mold made of GE22 material (a metal powder made of molybdenum, which is then sintered and pressed) withstood 36,000 fillings, while the surface quality deteriorated slightly, but edge chipping was noted.

If you are guided by data from a foreign press, then the mold can withstand, according to the schedule, 26 thousand press-fittings made of copper or copper-based alloys. Given that quick-change forming inserts are used in 2 pieces. for each casting of a cutting tool, in a molybdenum mold, you can get 13 thousand sets of inserts.

Given the increased requirements for cast cutting tools (accuracy and cleanliness of the cast surface), as well as domestic experimental data that the resistance of copper or alloy inserts based on it is not lower than the resistance of 3X2V8F steel inserts, we take the number of units of the cast cutting tool taken from each pair of quick-change form-forming inserts made of copper or alloys based on it, equal to 500.

Then the total number of punch drills according to the proposed method will be

500 × 13000 = 6500000 = 6.5 million pcs.

When using disposable quick-change mold-forming inserts from AL10, AL11 aluminum alloys made by stamping from liquid metal in molybdenum molds, the number of units of cast cutting tools can reach 500 thousand pieces. with the number of inserts up to 1 million pcs.

The proposed technical solution can also be used for the manufacture of surgical scalpels, compressor, turbine blades and other products.

Bibliography

1. RF patent No. 2252108, cl. B22D 17/00 claimed 08/05/2002, op. 05/20/2005.

2. A.S. USSR No. 605680, class B22D 17/10, claimed 12.02.75, op. 05/05/78 g.

3. Veinik A.I. Thermodynamics of the mold. Moscow, Mechanical Engineering, 1968, p. 233-236.

4. A.S. USSR No. 499961, class B22D 17/10, claimed 03/12/1974, op. 01/25/1976, BI No. 3.

5. RF patent No. 2075368, cl. B22D 18/02, claimed 09/25/92, op. 03/20/97, BI No. 8.

6. Goryunov I.I. Injection molds. Reference manual. L., "Engineering", 1973

7. TOLP EI 1968, No. 41, p.22-24; Machonis Alvin Precis. Metal, 1968, 28, No. 7, p. 54-57.

8. TOLP EI 12.11.1980, No. 42, p.1-9.

9. Gulyaev B.B., Lipnitsky A.M., Obolentsev F.D. Special casting methods. L., Engineering, 1971, p. 14.

10. Revis I.A., Lebedev T.A. Structure and properties of cast cutting tools. Vol. 2. L., Engineering, 1972

11. Goryunov I.I. Casting tool in metal molds. Sat reports of MO VNITOMASH. Cast and weld tool. M., Mashgiz, 1951, pp. 69-79.

12. A.S. USSR No. 51583, class B22D 17/10, claimed 08/05/74, op. 05/30/1976, BI No. 20.

13. Plyatsky V.M. Liquid metal stamping. M.-L., Engineering, 1964, p. 255.

Claims (5)

1. A method of stamping a liquid metal cutting tool on an injection molding machine with a horizontal pressing chamber, comprising pouring a dosage portion of the liquid metal into the pressing chamber, pressing the molten metal into the mold, removing the mold with casting and with the remainder from the pressing chamber by a pressing ram, characterized in that the mold is made in the form of quick-change mold-forming inserts by the method of stamping from liquid metal on an injection molding machine, fed to the pressing chamber, the press chamber is locked mobile mold, in this case, after the solidified casting is pushed out, the next set of quick-change forming inserts is fed into the pressing chamber and the above cycle of operations is repeated, and the casting is separated from the quick-change forming molds outside the injection molding machine, while at the same time the casting is made in the pressing chamber, it is quenched cast cutting tool, and as a quenching medium, material of forming inserts is used. 2. The method according to claim 1, characterized in that the glass of the pressing chamber for the manufacture of quick-change forming inserts is made unified with the glass of the pressing chamber for stamping a cast cutting tool from sintered and pressed molybdenum powder. 3. The method according to any one of claims 1 or 2, characterized in that the quick-change forming inserts are made on the same injection molding machine with a horizontal pressing chamber as the cast cutting tool, using a unified glass of the pressing chamber. 4. A device for stamping from liquid metal quick-change forming inserts for the manufacture of a cutting tool on an injection molding machine with a horizontal pressing chamber, containing a mold with a movable and fixed half-molds, a pressing chamber with a stepwise lengthwise inner surface, a removable insert fixed in a movable half-mold and installed with the possibility of its introduction into the pressing chamber into a step of a larger diameter, characterized in that the replaceable insert is made in the form of a cylindrical o a rod with a vertical transition into a diametrical longitudinal plane with a relief forming a mold cavity, while the replaceable insert is made of molybdenum powder, sintered and pressed. 5. The device according to claim 4, characterized in that on the diametrical longitudinal plane from the side of the mold connector, a flat protrusion is made on the rod with a thickness equal to half the height of the ventilation channel in the connector plane of the quick-change forming inserts.

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