RU2501624C2 - Method of upsetting fragile and low-plasticity cylindrical blanks - Google Patents

Method of upsetting fragile and low-plasticity cylindrical blanks Download PDF

Info

Publication number
RU2501624C2
RU2501624C2 RU2012112538/02A RU2012112538A RU2501624C2 RU 2501624 C2 RU2501624 C2 RU 2501624C2 RU 2012112538/02 A RU2012112538/02 A RU 2012112538/02A RU 2012112538 A RU2012112538 A RU 2012112538A RU 2501624 C2 RU2501624 C2 RU 2501624C2
Authority
RU
Russia
Prior art keywords
workpiece
diameter
cage
deformation
upsetting
Prior art date
Application number
RU2012112538/02A
Other languages
Russian (ru)
Other versions
RU2012112538A (en
Inventor
Борис Исаакович Каменецкий
Александр Леонидович Соколов
Алексей Юрьевич Волков
Николай Александрович Кругликов
Original Assignee
Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт физики металлов Уральского отделения Российской академии наук (ИФМ УрО РАН)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт физики металлов Уральского отделения Российской академии наук (ИФМ УрО РАН) filed Critical Федеральное государственное бюджетное учреждение науки Ордена Трудового Красного Знамени Институт физики металлов Уральского отделения Российской академии наук (ИФМ УрО РАН)
Priority to RU2012112538/02A priority Critical patent/RU2501624C2/en
Publication of RU2012112538A publication Critical patent/RU2012112538A/en
Application granted granted Critical
Publication of RU2501624C2 publication Critical patent/RU2501624C2/en

Links

Images

Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to upsetting of cylindrical blanks from fragile and low-plastics. Yoke is arranged at extractor surface in female die opening with clearance of 0.1-0.2 mm. Said yoke can be a split design. Blank is fitted into said yoke to strain the blank by acting with male die to yoke with blank. Male die has bottom straining part, its diameter exceeding maximum diameter of the blank after upsetting at preset reduction by 5-10 mm.
EFFECT: higher compressive loads and strain at room temperature and lower temperatures in one shaping pass.
2 cl, 2 dwg

Description

The invention relates to metallurgy, and in particular to methods for processing metals by pressure.

It is known that deformation of a material causes much less damage in it if it is performed under conditions of high compressive stresses. From this it follows that it is possible to achieve a more intense deformation of metals and alloys without fracture. Compressive stresses can be created by external action, for example, a compressed fluid or a plastic solid or by the reactions of the walls that limit the deformable material.

Two types of methods are known that are used to deform brittle and non-plastic materials by upsetting.

In the methods of the first type, high pressure liquid is used to create compressive stresses acting on the deformable workpiece. These methods do not allow the deformation of the workpieces under high hydrostatic pressure at low temperatures in the range (-50-197 ° C) due to freezing of liquids.

In the methods of the second type, clips (shells) of plastic material are used to create compressive stresses acting on the lateral surface of the deformable workpiece.

A known method of precipitation of billets from brittle low-plastic alloys [L.N. Moguchev “Using clips to increase the deformability of low-plastic alloys” Collection “Research on heat-resistant alloys” Institute of Metallurgy named after A.A. Baykova. Publishing House AN. USSR, 1956, p.118-123]. The method is as follows. A billet of brittle material having a height equal to the height of the holder is tightly installed in the hole of the holder. Then carry out the assembly of the cage with the workpiece, after which the assembly and punches are heated in an electric furnace to a temperature of 400 ° C. After exposure in the furnace, the assembly is placed on a heated lower punch placed on a press or hammer, then the heated upper punch is installed and assembly is upset. During the upsetting process, the assembly height decreases, and the diameters of the cage and the workpiece increase.

Friction forces that occur when the cage moves along the surfaces of the punches make it difficult to expand the cage bore and increase the diameter of the workpiece, due to this, radial compressive stresses act on the side surface of the workpiece. The presence of radial compressive stresses on the surface of the workpiece provides a precipitation process with lateral support, which significantly increases the ductility of the sample.

The article describes experiments on the upsetting by this method of preforms of low-plastic alloys of magnesium MA2 and MAZ having a cast structure at a temperature of 400 ° C on a hammer with a weight of falling parts of 1500 kg. The use of this hot precipitation method has increased the plasticity of the samples from 40% to 85%.

In an experiment on cold settlement of ring cages by this method, it was found that an increase in the outer diameter of the cage is much more intense than a decrease in the diameter of its hole and cracks may appear on the periphery of the cage, and the lateral pressure from the side of the cage’s opening onto the surface of the deformable sample is small.

Thus, the method does not allow the sedimentation of samples from brittle and low-plastic materials with high degrees of deformation in the range of room and lower temperatures, in one operation of forming.

Closest to the claimed technical essence is the method of precipitation of cylindrical billets of low-plastic alloys [L.N. Moguchev “Using clips to increase the deformability of low-plastic alloys” Collection “Research on heat-resistant alloys” Institute of Metallurgy named after A.A. Baykova. Publishing House AN. USSR, 1956, p. 115-118].

The method is as follows: a cylindrical billet of brittle or non-ductile material, for example, magnesium alloy MA2, is tightly installed in the hole of the holder, and the assembly of the holder with the workpiece is carried out. The assembly and punches are heated in an electric resistance furnace to 400 ° C. During the first operation, the lower punch is installed on the press table and the holder is laid on it with its lower cavity. Subsequently, the upper punch is installed in the upper cavity of the holder and the assembly is upset. The diameter of the punch is larger than the diameter of the workpiece, therefore, not only the workpiece, but also the annular, cylindrical surface of the cage are subjected to upsetting with increasing diameters. In the process of reducing the height of the workpiece and increasing its diameter, the outer diameter of the holder also increases, but at each moment of blanking the workpiece, pressure p (radial compressive stresses) from the side of the expanding hole of the holder acts on its side surface. The value of this pressure is determined by the formula:

Figure 00000001

where: ε is the degree of deformation of the workpiece during upsetting, r and R are the radii of the deformed sample and the cage in mm, σ in is the tensile strength of the cage material at the temperature of the operation, MPa.

The degree of deformation of the workpiece during upsetting is determined by the formula (2). The radii of the deformed workpiece and the r and R clips are determined based on the condition of constant volume during shaping.

Figure 00000002

where: H 1 is the initial height of the workpiece in mm, H 2 is the final height of the workpiece in mm.

Thus, the blanking of the workpiece in this method is performed under the action of compressive stresses on the ends and the side surface, which allows deformation of the workpiece from brittle and non-plastic materials without breaking it.

However, the first upsetting operation can only be performed with a degree of deformation at which the diameters of the ends of the upsetting workpiece become approximately equal to the diameters of the punches. Size ratios: holders D / d = 1.7 and punches with a sample d 1 = 1.3d, determine the degree of deformation of the workpiece in the first upsetting operation ε 1 ~ 35%. An increase in the degree of deformation at which the diameter of the end face of the workpiece becomes larger than the diameter of the punch leads to the process of backward extrusion of the workpiece with the formation of a cavity under the punch and walls around the punch. The appearance of the process of backward extrusion of the workpiece leads to the cessation of expansion of the hole of the cage and the increase in the diameter of the workpiece. After performing upsetting with such a degree of deformation, the diameter of the end face of the workpiece is d t ~ d 1 , and the outer diameter of the cage increases and takes on the value D 1 ~ 1.2D.

The second precipitation operation was performed using two punches having diameters d 2 = 2d. Before the start of the second operation, cavities having a diameter of d 2 and a depth of h 2 = (0.1 ÷ 0.2) d 2 were bored on the end surfaces of the deformed holder, these cavities provided centering of punches from both ends of the holder. Deformation was also carried out after heating blanks with clips and punches to a temperature of 400 ° C. After the second operation of upsetting the workpieces, a total accumulated degree of deformation of 75% was achieved, while the diameter of the end face of the workpiece was d t2 ~ d 2 , and the outer diameter of the cage increased and took the value D 2 ~ 1.7D. Thus, the application of this method allows to achieve high degrees of deformation at a temperature of 400 ° C of 70-75% without destruction when upsetting workpieces from MA2 alloy, while with a free upsetting of the same workpieces at a temperature of 400 ° C, the maximum degree of deformation is 40- 45%

The method allows for fixed values: the radius of the workpiece r, the diameter of the punch d 1 and the tensile strength of the cage material σ in , to increase the pressure from the side of the cage to the side surface of the deformable sample p due to the increase in the outer radius of the cage R, in accordance with formula (1) . However, with an increase in the R / r ratio by a factor of 2, the value of p will increase only 1.22 times. For a more effective increase in pressure p, it is necessary that the increase in the outer radius of the cage R occur under the constrained flow of the material of the cage, for which it is necessary to install the cage with a blank in the matrix with a small gap z and to deform the cage by the method of cold inverse extrusion. When the holder is deformed by this method, an increase in the value of compressive stresses acting on the ends and lateral surface of the workpiece during its upset is achieved.

The method has the following disadvantages:

- for the upsetting of cylindrical billets from brittle and low-plastic materials with high degrees of deformation, the use of several upsetting operations with the replacement of punches after each shaping operation is required;

- the method cannot be used for settling brittle and low-plastic samples with large degrees of deformation in the range of room and cryogenic temperatures due to the appearance of tangential tensile stresses on the periphery of the cage, since their effect at low temperatures leads to cracks even at small deformations of the workpiece;

The basis of the claimed invention is the task of settling cylindrical billets from brittle and non-plastic materials with high degrees of deformation in the range of room and lower temperatures, in one operation of forming, due to an increase in the value of compressive stresses acting on the workpiece.

The problem is solved in that in the method of settling cylindrical workpieces from brittle and non-ductile materials, including installing the workpiece in the cage and depositing the workpiece by the action of the punch on the cage, according to the invention, before installing the workpiece in the cage, the latter is placed on the surface of the ejector in the matrix hole with a gap of 0.1 to 0.2 mm., Selected from the ratio D 1 = D 2 + 2z, where:

D 1 - the diameter of the holes of the matrix;

D 2 - diameter of the cage;

z is a one-way gap between the matrix hole and the diameter of the cage, and the deformation is carried out by a punch made with the lower deforming part, the diameter selected from the relation D 3 = d 1 + δ, where:

D 3 - the diameter of the lower deforming part of the punch;

d 1 - the largest diameter of the workpiece after upsetting at a given degree of deformation;

δ is the difference between the diameters of the deforming part of the punch and the largest diameter of the workpiece after upsetting,

which exceeds the largest diameter of the workpiece after upsetting by a given degree of deformation by 5-10 mm.

In this case, the clip can be made detachable.

Placing the workpiece on the surface of the ejector in the hole of the matrix with a gap of 0.1 to 0.2 mm., Allows the deformation of the cage by the method of reverse cold extrusion, which ensures a change in its inner diameter, and the outer diameter remains equal to the diameter of the hole of the matrix, due to this , achieved an increase in the magnitude of compressive stresses acting on the ends and lateral surface of the workpiece when it is upset.

The inventive method provides for the joint deformation of the cage and the workpiece, the occurrence of high values of compressive stresses, allowing to carry out the precipitation of the workpieces from brittle and low-plastic materials with high degrees of deformation at room and lower temperatures.

The hole diameter of the matrix - D 1 is selected from the condition D 1 = D 2 + 2z, as shown in figure 1. In this ratio, D 2 is the diameter of the holder, z is the one-sided gap between the hole of the matrix and the diameter of the holder. The gap z depending on the size of the cage is from 0.1 to 0.2 mm.

The diameter of the lower deforming part of the punch is selected from the relation D 3 = d 1 + δ, as shown in figure 2. In this ratio, d 1 is the largest billet diameter of the preform after upsetting to a given degree of deformation, δ is the difference between the diameters of the deforming part of the punch and the largest diameter of the preform after upsetting. Diameter d 1 is calculated for a given degree of deformation from the condition of constant volume and is refined on the basis of experiments. The value of δ depending on the degree of deformation is taken in the range of 5-10 mm.

The choice of the diameter of the lower deforming part D 3 = d 1 + δ, the punch allows the preform to be billet made of brittle and low-plastic materials with high degrees of deformation at room and lower temperatures, to change the magnitude of the compressive stresses acting on the end face and side surface of the workpiece during the upsetting process , by increasing the diameter of the punch with fixed diameters of the cage and the workpiece. As the diameter of the punch increases, the degree of deformation of the casing material increases in accordance with formula (3), as well as the specific pressure on the punch and on the side surface of the workpiece in accordance with formula (4). The ability to control the values of compressive stresses allows us to significantly expand the class of brittle materials that will deform without failure at room and lower temperatures.

The method allows the use of composite clips, consisting of two half rings, which are made from flexible sheet blanks or pipe segments. Experimental studies have shown that when using composite cages, it is possible to achieve a high level of compressive stresses when upsetting blanks. The use of composite clips provides quick extraction of deformed billets (products) in the production of pilot batches.

The inventive method allows the upsetting of cylindrical billets for subsequent hot stamping of magnesium grade Mg90, wrought magnesium alloys systems: Mg-Mn, Mg-Al-Zn, Mg-Zn-Zr. The method is also effective in cold precipitation of alloys based on bismuth, zinc, titanium, a group of aluminum alloys with additives of silicon and a number of other brittle materials having a cast structure. Cold precipitation of workpieces by the claimed method provides a reduction in the number of technological operations in comparison with traditional technologies, saves energy and prevents surface oxidation.

Figure 1 shows a device for settling cylindrical billets of brittle and non-plastic materials and the relative position of its parts at the moment the punch touches the cage.

Figure 2 shows the relative position of the parts at the end of the process of sedimentation of the sample.

The device for settling brittle and non-plastic materials consists of the following parts: top plate 1, holder 2 with an opening for mounting the workpiece 3, punch 4, die 5, ejector 6 and lower plate 7. The upper plate 1 is attached to the press slider. (In FIGS. 1 and 2, fragments of a press slider are shown by thin lines above plate 1). The bottom plate 7 is installed and secured to the press table. (In FIGS. 1 and 2, fragments of the press table are shown by thin lines under the plate 7). The punch 4 is installed along the axis of the device and mounted on the upper plate 1. The diameter of the lower part of the punch 4, D 3 is greater than the maximum diameter of the deformed workpiece d 1 by δ = 5-10 mm, as shown in figure 2. The matrix 5 is mounted on the bottom plate 7. The ejector 6 and the punch 4 are moved along the hole of the matrix 5 along the sliding landings. Raising and lowering the ejector 6 is carried out from a separate drive available to the press (not shown in FIG. 1 and FIG. 2).

A device for settling brittle and non-plastic materials works as follows. The cartridge 2, coated with grease from both ends and along the side surface, is placed in the matrix 5 on the surface of the ejector 6, then the blank 3 is tightly installed in the hole of the holder 2. After this, the press is turned on and the idle 4 is lowered to touch the end surface of the holder 2. The relative position of the parts of the device at this moment is shown in figure 1. Subsequently, the press switches to a stroke and the punch 4 sags the workpiece 3 and a portion of the surface of the holder 2 having an outer diameter D 3 from the initial height h 0 to the final height h 1 . The relative position of the parts of the device at the end of the deformation process is shown in figure 2. As shown in figure 2, after the deformation is completed, the workpiece 3 took the form of a barrel with a maximum diameter of d 1 and a height of h 1 , and the holder 2 has the shape of a glass with an outer diameter of D 1 , an inner diameter of D 3 and a bottom of height h 1 . Then the punch 4 is lifted to its original position and the press ejector mechanism 6 is turned upward, while the ejector 6 lifts the deformed clip 2 with the workpiece 3 above the end of the die 5. In this position, the deformed clip 2 is removed from the ejector 6 and removed from the press working space, then the ejector 6 is lowered to the lower position and the precipitation cycle is completed. Subsequently, incisions are made on the surface of the ferrule 2 and the deformed preform 3 is removed.

At the Federal State Budgetary Institution of Science, Order of the Red Banner of Labor, Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, a device was developed for implementing the inventive method of settling cylindrical billets from brittle and non-plastic materials. Precipitation without cages at room temperature of cylindrical billets made of brittle and non-ductile materials such as Mg90 magnesium, wrought magnesium alloys of the systems Mg-Mn, Mg-Al-Zn, Mg-Zn-Zr and a group of aluminum alloys with silicon additives was accompanied by the appearance of cracks at the ends and lateral surface already at a degree of deformation ε = 5-10%. A significant increase in the ductility of Mg90 grade magnesium allows us to draw conclusions about the possibility of cold precipitation with large degrees of deformation of workpieces from magnesium alloys of the systems: Mg-Mn, Mg-Al-Zn, Mg-Zn-Zr.

A cylindrical billet made of magnesium grade Mg90 was tightly installed in the hole of the cage placed in the matrix. The clips with an outer diameter of 39.8 mm and an inner diameter of 16 mm and a height of 32 mm were made of copper forging. The device consisted of the following parts: top plate, punch holder, die, ejector and bottom plate. The top plate is bonded to the press slider, and the bottom plate is mounted and secured to the press table. The punch is installed on the axis of the device, mounted on the upper plate and has a diameter of the lower part D 3 = 34 mm The ejector and punch moved in the hole of the matrix along the sliding landings. Raising and lowering the ejector was carried out from a separate drive available in the press. A matrix with a hole diameter of 40 mm was installed along the axis of the press, fastened to the bottom plate, and the ejector was placed in the lower part of the matrix. The matrix, punch and ejector were made of X12M steel, GOST 5950-87 and had a hardness of HRC 50..55. The upper and lower plates were made of steel 45KHNMFA, GOST 4543-71 and had a hardness of HRC 35..40.

The device was installed on a DB-2240 hydraulic press with an effort of 10,000 kN. The first series of experiments on the precipitation of Mg90 grade magnesium preforms was carried out at room temperature. The cartridge, coated with grease from both ends and along the side surface, was laid in a matrix on the surface of the ejector, then a workpiece was tightly installed in the hole of the cartridge. After that, the press was turned on and the idle was lowered until the end surface of the cage was touched. Subsequently, the press was switched to the working stroke and the punch settled the sample and the portion of the surface of the cage having an outer diameter of D 3 = 39.8 mm from the initial height h 0 = 32 mm to the final height h 1 = 9.5 mm.

Thus, the magnesium billet was precipitated in a holder with a working stroke of the press of 22.5 mm, with a degree of deformation ε 1 = (32-9.5) / 32 = 0.703 ~ 70%, determined by the formula (1).

The precipitation of the five magnesium blanks in the holders was performed with a degree of deformation of 70%, while the deformation of the holder was carried out by the method of reverse cold extrusion, after which the holder took the form of a glass with an outer diameter of D 1 = 40 mm, an inner diameter of D 3 = 34 mm and the bottom height h 1 = 9.5 mm. When the cage is deformed by reverse cold extrusion, its inner diameter changes, and the outer diameter is equal to the diameter of the matrix hole, thereby increasing the magnitude of the compressive stresses acting on the ends and side surface when the magnesium billet is deposited.

In the closest method, the clip during deformation is subjected to sediment, which is accompanied by an increase in its inner and outer diameters. With this shape-changing of the cage, the compressive stresses acting on the ends and lateral surface of the cylindrical workpiece are significantly lower than when the cage is deformed by the method of cold inverse extrusion, these data are confirmed on the basis of a series of experiments.

The degree of deformation of the casing material during reverse cold extrusion is determined by the formula:

Figure 00000003

where: F 0 is the area of the cage in mm 2 , F 1 is the area of the deformed cage in mm 2 , D 1 is the diameter of the hole of the matrix in mm, D 3 is the diameter of the lower part of the punch in mm, d 0 is the diameter of the hole in the cage in mm.

In the literature [A.A. Shofman. Basics of calculation of stamping and pressing processes M, Mashgiz, 1961, 350 pp.] The specific pressure on the punch during reverse cold extrusion-q "is determined by the formula:

Figure 00000004

where: F 0 is the area of the cage in mm 2 , F 1 is the area of the deformed cage in mm 2 , σ in is the tensile strength of the material of the cage, k c is the coefficient having the following values: for aluminum k c = 3,5-4,0 , for copper, brass and mild steel k c = 2.5-3.0.

The degree of deformation of the material of the cage during reverse cold extrusion, for the diameter of the lower part of the punch 34 mm will be:

ε 2 = (34 2 -16 2 ) / (40 2 -16 2 ) = 0.67 = 67%.

Thus, the precipitation of the magnesium billet in the holder with a punch with a diameter of 34 mm was performed with a degree of deformation of 70%, and the deformation of the holder was carried out by the method of cold reverse extrusion with a degree of deformation of 67%.

Then the clip was cut and the deformed workpiece was removed, which acquired the following dimensions: diameters of the upper and lower ends 28 mm, the diameter of the middle part of the workpiece 31 mm, height 9.5 mm. Microcracks and other defects on the side surface and the ends of the workpiece were not found. The remaining four samples were deformed under the same conditions and did not have microcracks and other defects on the side surface and ends of the samples. When blanks were upset with a diameter of 16 mm using a punch with a bottom diameter of 34 mm, the maximum press force was 740 kN, and the specific pressure on the punch was 820 MPa.

The second series of experiments on the precipitation of magnesium billets was carried out using clips consisting of two annular parts. The lateral and end surfaces of the annular parts were coated with grease, after which they were tightly installed in the matrix, forming a cage with an inner diameter of 6 mm. Then, a magnesium billet was tightly installed in the hole of such a holder and precipitation was carried out at room temperature. Sediment experiments were carried out under the same conditions as in the first series of experiments: the degree of deformation of magnesium samples ε 1 = 70%, the degree of deformation of the composite holder ε 2 = 67%. In total, three workpieces were deformed, which, after deformation, were removed from the composite clips. All blanks had no microcracks and other defects on the side surface and ends. When blanks with a diameter of 16 mm were upset in composite holders using a punch with a bottom diameter of 34 mm, the maximum press force was 750 kN, and the specific pressure on the punch was 830 MPa.

The third series of experiments on the precipitation of magnesium billets was carried out at liquid nitrogen temperature, the experiments were also performed using composite cages consisting of two annular parts. Before starting this work, a small modernization of the design of the device was performed. To do this, in order to reduce heat dissipation, heat-insulating gaskets were installed on both surfaces of the lower plate. A hollow cylindrical container was installed under the matrix and the matrix and container were fixed to the plate, ensuring the tightness of the container by compressing the insulating gasket. A screen made of polyurethane foam was installed and fixed on the outer surface of the cylindrical container for the purpose of thermal insulation.

The method was carried out as follows: the annular parts of the cage were tightly installed in the matrix, forming a cylinder with an inner diameter of 16 mm. Then, a magnesium billet was tightly installed in the hole of such a holder, after which the cylindrical container was filled with nitrogen, which after evaporation became liquid and cooled the matrix and the holder with the workpiece. At this moment, the magnesium billet was precipitated with a degree of deformation ε 1 = 70%, and a degree of deformation of the composite holder ε 2 = 67%. Under such conditions, three blanks were upset, which, after deformation, were removed from the composite clips. All blanks had no microcracks and other defects on the side surface and ends. When blanks with a diameter of 16 mm were upset in composite holders using a punch with a bottom diameter of 34 mm, at a temperature of liquid nitrogen, the maximum press force was ~ 1000 kN, and the specific pressure on the punch was 1100 MPa. Thus, the sedimentation of magnesium preforms at a temperature of liquid nitrogen under conditions of applying high compressive stresses, allows for shaping with large degrees of deformation without cracks.

In the same way, cylindrical billets can be deposited from such brittle and non-plastic materials as bismuth, zinc, titanium alloys and a group of aluminum alloys with silicon additives, since cold precipitation is performed under conditions of high level compressive stresses. The application of compressive stresses during the upsetting of the preforms makes it difficult to create pores and microcracks in the material even at low temperatures.

Claims (2)

1. A method of settling cylindrical billets from brittle and non-plastic materials, comprising installing the workpiece in a cage and deforming the workpiece by exposing the workpiece to a cage with a workpiece, characterized in that before installing the workpiece in the cage, the latter is placed on the surface of the ejector in the matrix hole with a gap of 0.1 to 0.2 mm, and the deformation of the workpiece is carried out by a punch made with a lower deforming part, the diameter of which exceeds the largest diameter of the workpiece after upsetting with a predetermined the strain of the magnitude of 5-10 mm.
2. The method according to claim 1, characterized in that they use a clip made detachable.
RU2012112538/02A 2012-03-30 2012-03-30 Method of upsetting fragile and low-plasticity cylindrical blanks RU2501624C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2012112538/02A RU2501624C2 (en) 2012-03-30 2012-03-30 Method of upsetting fragile and low-plasticity cylindrical blanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2012112538/02A RU2501624C2 (en) 2012-03-30 2012-03-30 Method of upsetting fragile and low-plasticity cylindrical blanks

Publications (2)

Publication Number Publication Date
RU2012112538A RU2012112538A (en) 2013-10-10
RU2501624C2 true RU2501624C2 (en) 2013-12-20

Family

ID=49302596

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2012112538/02A RU2501624C2 (en) 2012-03-30 2012-03-30 Method of upsetting fragile and low-plasticity cylindrical blanks

Country Status (1)

Country Link
RU (1) RU2501624C2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1042854A1 (en) * 1975-03-10 1983-09-23 Цниитмаш (Инопредприятие) Apparatus for feeding strip and band material to press working zone
SU1535666A1 (en) * 1987-05-15 1990-01-15 Коммунарский горно-металлургический институт Arrangement for upsetting billets
SU1759512A1 (en) * 1990-12-26 1992-09-07 Уральский политехнический институт им.С.М.Кирова Method of upsetting cylindrical blanks from low-ductile materials
US7454941B2 (en) * 2004-10-29 2008-11-25 Snecma Upsetting method for working a metal slug, method for preparing a slug for a forging operation according to the method and device for implementing the method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1042854A1 (en) * 1975-03-10 1983-09-23 Цниитмаш (Инопредприятие) Apparatus for feeding strip and band material to press working zone
SU1535666A1 (en) * 1987-05-15 1990-01-15 Коммунарский горно-металлургический институт Arrangement for upsetting billets
SU1759512A1 (en) * 1990-12-26 1992-09-07 Уральский политехнический институт им.С.М.Кирова Method of upsetting cylindrical blanks from low-ductile materials
US7454941B2 (en) * 2004-10-29 2008-11-25 Snecma Upsetting method for working a metal slug, method for preparing a slug for a forging operation according to the method and device for implementing the method

Also Published As

Publication number Publication date
RU2012112538A (en) 2013-10-10

Similar Documents

Publication Publication Date Title
Faraji et al. Review of principles and methods of severe plastic deformation for producing ultrafine-grained tubes
JP5913302B2 (en) Lubrication method for improved forgeability
Eslami et al. An investigation on diffusion bonding of aluminum to copper using equal channel angular extrusion process
Cheng et al. Drawability of AZ31 magnesium alloy sheet produced by equal channel angular rolling at room temperature
Singh et al. Understanding formability of extra-deep drawing steel at elevated temperature using finite element simulation
Rosochowski et al. Numerical and physical modelling of plastic deformation in 2-turn equal channel angular extrusion
US9539636B2 (en) Articles, systems, and methods for forging alloys
Xu et al. Hardness homogeneity and micro-tensile behavior in a magnesium AZ31 alloy processed by equal-channel angular pressing
RU2191652C1 (en) Method for producing blanks of small-grain structure
Moon et al. Effect of tool temperature on the reduction of the springback of aluminum sheets
Kazanowski et al. Bi-metal rod extrusion—process and product optimization
CN101941039B (en) High-strength aluminum alloy isothermal direction-change open die forging method and device
Segal Engineering and commercialization of equal channel angular extrusion (ECAE)
CN102554040B (en) Magnesium alloy sheet different temperature drawing mold
CN103894436B (en) A kind of reciprocating extrusion device and processing method strengthening magnesium-alloy tube
Park et al. Characterization of deformation stability in hot forging of conventional Ti–6Al–4V using processing maps
RU2351422C1 (en) Method of production of steel seamless pipes of major diameter
Fatemi-Varzaneh et al. Processing of AZ31 magnesium alloy by a new noble severe plastic deformation method
Azushima et al. Severe plastic deformation (SPD) processes for metals
CN101695739B (en) Forging process of large tee and large skew tee
Ameli et al. A parametric study on residual stresses and forging load in cold radial forging process
CN103170798A (en) Machining method of high-quality large-diameter thin-wall metal barrel body
Ebrahimi et al. Wear properties of brass samples subjected to constrained groove pressing process
US20140342179A1 (en) Systems and methods for shaping sheet materials that include metallic glass-based materials
CN103962802B (en) Warm extrusion forming process of internal thread joint of petroleum drill rod

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20150331