SU1798141A1 - Article surface hardening shot-blast unit - Google Patents

Description

UNION OF SOVIET

SOCIALIST

REPUBLIC. .. SU ... 1798141 A1 (51) 5 B 24 C 3/08

STATE PATENT OFFICE OF THE USSR (USSR STATE PATENT)

DESCRIPTION OF THE INVENTION ¹

TO THE AUTHOR'S CERTIFICATE '2 (21) 4846888/08 (22) 04.07.90 · ·. = (46) 28.02.93. Bul. №8 (71) Togliatti Polytechnic Institute.

(72) V.V. Petrosov, S.N. Zaitsev, and S.A. Mandrin.

(56) USSR author's certificate No. 1678585. class. B 24 C 3/08, 1989.

(54) SHOT BLASTING INSTALLATION FOR SURFACE HARDENING OF PRODUCTS (57) The invention relates to the automotive, tractor and machine-building industries. The purpose of the invention is to improve the quality of processing parts. The shot blasting unit for surface hardening of products contains a working chamber 1. stationary 2 and movable 3 nozzles-ejectors. shot 10, spindle 11 and za-, this headstock 12, cam mechanism 13 for regulating the fluid pressure in front of the ejector nozzles 3. cutting angle of the fraction) due to maintaining a constant distance between the upper cut of the ejector nozzles and the surfaces of the connecting rod and main journals, each ejector nozzle for the connecting rod journals consists of two spring-loaded pipes with a telescopic connection and hooks for hanging on the connecting rod journals, and fixed to two the chamber through a hinge that allows the nozzle to rotate in a plane perpendicular to the axis of the part. 2 ill.

FIG. 7 connecting rod journals of the crankshaft 9. The cover of the working chamber 1 is hermetically closed, the drive 21 for rotation of the crankshaft 9 is turned on, and the working fluid is supplied to 5 C-E 2 and 3. Regulation of the fluid pressure on the movable C-E. 3 is carried out by the mechanism 13, while the shaft 15 with the cams 16 mounted on it rotates synchronously with the crankshaft 9, the cams 16 push the spring-loaded valves 18, which in their turn. by changing the cross-section of the outlet openings.

regulate the pressure of the working fluid, depending on the elongation of the C-E 3, when moving the connecting rod journals from the extreme lower position, to the extreme upper, ensuring the constancy of the rigidity of the shot processing mode. The pressure of the working fluid supplied to the stationary S-E 2 does not change, providing a ^{mode similar to 1} rigidity, i.e. shot flow rate, shot spray angle and its minute consumption. '

Thus, in comparison with the device, taken as a prototype, offered by a fraction of the surface of all the main ischetunny cheeks at the same time, ensuring the identity of the stiffness modes, as a result, to increase the productivity and quality of the crankshafts.

Claims (2)

Claim Shot blasting machine for surface hardening of products, such as crankshafts, containing a working chamber with The invention relates to the field of automotive, tractor, machine-building ¹ industry, where crankshafts for internal combustion engines are made, and is aimed at increasing the efficiency and wear resistance of the crankshaft journals. The purpose of the invention is to improve the quality of processing due to the simultaneous processing of all the main and connecting rod journals of the crankshaft while ensuring the same conditions for their processing with shot. FIG. 1 shows the proposed installation; in fig. 2 - installation, cross-section,. The proposed shot-blasting installation contains a working chamber 1, stationary nozzles-ejectors (SE), equal in number to the number of main journals, movable SE 3 in number equal to the number of connecting rod journals 20. ' ' Movable С-Э 3 consist of two pipes, internal 4 and external 5, connected telescopically and spring-loaded on a shift. ). _...... ... ._ ...., ...___ gania. for example two springs b. Internal 25 installation Allows for machining. ... parallel to the axis of the knee to be machined -. La 9, which provides rocking of the SE 3 in the 30th plane perpendicular to the shaft of the shaft 9.. ! \ '.' · · '· ^: ·· ..' In the working chamber 1 there are shot '10, the spindle 11 and the tailstock 12 for fixing the crankshaft 9. The chamber 1 is connected by 35 centers located in it for installed with the cam mechanism 13 for the processed crankshafts, with continuous pressure control by the drive. rotation and fraction, and tayuke. · .. liquids before SE 3, depending on po; nozzles-ejectors associated with the energy position of the surface of the connecting rod journals of the crankshaft 9 relative to the C-E 3. Movable С-Э 3 have hooks 14 for hanging them on the corresponding connecting rod journals. With this, the cam mechanism 13 consists of a shaft 15 with cams 16 mounted on it, connected to the spins; 45 we divide 11 by means of a chain transmission 17 having a gear ratio of 1; 1, valves 1 $ with springs, 19. Working fluid / shaft, i.e. that, with a target on the stationary C-E2 comes from the common receiver 20. ' The installation works as follows. After installing the crankshaft 9 and fixing it in the spindle 11 and tailstock 12, the hooks 14 located on the fixed 55-55 C-E 3. are fixed on the corresponding supply unit, and a part of the nozzles equal to the number of crank journals to be processed is made with a telescopic installed spring-loaded nozzles, on each of which a hook is fixed and the indicated ones are installed. telescopic nozzles with the ability to rotate about an axis parallel to the axis of the centers of the processed cranked to improve the quality of processing, the installation is equipped with a mechanism for adjusting the pressure in telescopic nozzles made in the form of a shaft with cams installed parallel to the axes of the centers of the shaft according to the number of specified: nozzles connected through throttling devices with the introduced into the installation with an additional power supply unit.