SU645721A1 - Article-pressing method - Google Patents

Article-pressing method

Info

Publication number
SU645721A1
SU645721A1 SU772438908A SU2438908A SU645721A1 SU 645721 A1 SU645721 A1 SU 645721A1 SU 772438908 A SU772438908 A SU 772438908A SU 2438908 A SU2438908 A SU 2438908A SU 645721 A1 SU645721 A1 SU 645721A1
Authority
SU
USSR - Soviet Union
Prior art keywords
container
pressing
press
speed
length
Prior art date
Application number
SU772438908A
Other languages
Russian (ru)
Inventor
Яков Михайлович Охрименко
Валерий Николаевич Щерба
Алексей Иванович Батурин
Дмитрий Борисович Ефремов
Александр Васильевич Гусев
Original Assignee
Московский институт стали и сплавов
Предприятие П/Я А-1977
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 Московский институт стали и сплавов, Предприятие П/Я А-1977 filed Critical Московский институт стали и сплавов
Priority to SU772438908A priority Critical patent/SU645721A1/en
Application granted granted Critical
Publication of SU645721A1 publication Critical patent/SU645721A1/en

Links

Description

(54) METHOD OF PRESSING PRODUCTS

the rest of its volume is more large. . Thus, there is a negative effect {compression of the metal in the radial direction near the matrix), the NTO leads to an increase in the mechanical properties in the area of the rear end of the press product in comparison. with its anterior headboard and middle, in addition, the overlap ko1: is unnecessarily high (the trainer in the final stage of pressing the elevator unreasonably increased the lead of the container stroke, a), leads to a real increase in the hollow matrix holder and the press as a whole. I c1; 1knsaetsya mechanical resistance of the holder.

The aim of the invention is to ensure (5) the uniformity of the lio properties of the pressed products.

The supply chain is achieved by the fact that in pressing the pressing speed of the container transfer the container is cleverly SOT, while at the beginning of the process of container speed the speed of the press stamp is l.e-fi ,, and in kosche - 1,05g1,1.

FIG. 1 is a presentation diagram of the implementation of the proposed method; in fig. 2 is a graph of the change in the velocity of the transverse container and the speed of movement of the press bar vtel (K s) depending on the displacement of the relative deformation along the length of the product (-t -), where rc is the absolute deformain and the length of the workpiece, and LQ is the original length blanks. . The method is as follows.

A solid billet 1 heated to the extrusion press is fed into the press container 2 up to the front surface of the matrix 3, then moving the press ram 4 on the right to the left (Fig. 1) performs the pressing of the billet. At the end of the pressing of the press stamp, the working force is reported, under the influence of which the product starts to be squeezed out of the goggle point. At the same time, the cylinder 5 is switched on, and the container 2 begins to move in the same direction as the ram 4, but at a speed of 1, 7 times more sick than the last. Immediately upon reaching the specified speed (which is the same for р ё

With the beginning of the steady metal flow), the speed of the container} shchina1ot from smoothly decrease and continue to decrease until reaching} w K l, 05fl, i in the extrusion.

Example. 20 blanks of D16 grade alumina alloy with a diameter of 38 mm and a length of 80 mm were heated in an electric resistance furnace up to 430 ° C, and then pressed on a vertical hydraulic press with a force of 200 i.e. The diameter of the hole in the container container is 40 mm, the temperature of the container heating before the npeccoBaimeM 370 C. In the process of pressing, rods of 12 mm diameter were obtained. .

Compression using active friction forces from the container billet was carried out at a ratio of the speed of the moving container to the speed of the ram displacement equal to 1.7 at the beginning of the process, followed by a continuous reduction of the speed of movement of the container until the value of the specified ratio corresponding to 1.1 at the end of the pressing cycle. The billet discharge rate of the billet during pressing was 13. m / min. The press is performed without a C1 | lazka container. .

Mechanical testing of samples cut on yiacTKax along the length of the rod pressed by the proposed method showed that the variation of the strength characteristics along the length of the product does not exceed 0.5 kg / mm both in tensile strength and in yield strength. With a press of constant K 1.4, this variation is, respectively, 3.5 kg / mm and 1.5 kg / mm 5.

The use of the proposed method of pressing products provides, in comparison with the known methods, the following advantages; ,

- due to regulated regulation of the speed ratio of the container and the ram throughout the entire pressing cycle, an increase in the uniformity of properties, in particular mechanical properties, along the length of the pressed products, which allows cyiJjecTEeHHo to improve product quality}

- the possibility of reducing the dimensions of predominantly length, extrusion press while maintaining

SU772438908A 1977-01-04 1977-01-04 Article-pressing method SU645721A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU772438908A SU645721A1 (en) 1977-01-04 1977-01-04 Article-pressing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU772438908A SU645721A1 (en) 1977-01-04 1977-01-04 Article-pressing method

Publications (1)

Publication Number Publication Date
SU645721A1 true SU645721A1 (en) 1979-02-05

Family

ID=20690168

Family Applications (1)

Application Number Title Priority Date Filing Date
SU772438908A SU645721A1 (en) 1977-01-04 1977-01-04 Article-pressing method

Country Status (1)

Country Link
SU (1) SU645721A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995013150A1 (en) * 1993-11-10 1995-05-18 Valery Nikolaevich Scherba Process for the hot extrusion of metal with the active assistance of friction forces, and a hydraulic extrusion press for carrying out this process
WO1996014948A1 (en) * 1994-11-11 1996-05-23 Valery Nikolaevich Scherba Friction-assisted hot extrusion method for producing hollow articles and a hydraulic press for carrying out said method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995013150A1 (en) * 1993-11-10 1995-05-18 Valery Nikolaevich Scherba Process for the hot extrusion of metal with the active assistance of friction forces, and a hydraulic extrusion press for carrying out this process
EP0747144A4 (en) * 1993-11-10 1996-12-04 Valery Nikolaevich Shcherba Process for the hot extrusion of metal with the active assistance of friction forces, and a hydraulic extrusion press for carrying out this process
WO1996014948A1 (en) * 1994-11-11 1996-05-23 Valery Nikolaevich Scherba Friction-assisted hot extrusion method for producing hollow articles and a hydraulic press for carrying out said method
EP0739662A4 (en) * 1994-11-11 2001-10-04 Valery Nikolaevich Shcherba Friction-assisted hot extrusion method for producing hollow articles and a hydraulic press for carrying out said method

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