SU1274916A1 - Multiroller knurling tool - Google Patents

Abstract

The invention relates to the processing of metals by plastic deformation and can be used for machining face and taper surfaces for finishing and strengthening surface treatment by rolling. The purpose of the invention is to expand the technological capabilities of knurling by machining face and conical surfaces with obtaining a guaranteed distance between them and making quality. For this multi-roll knurling supply an additional separator with tapered rollers. The latter are installed in the housing at an angle to the axis of the knurling and interact with the conical bearing surface of the housing. The angle of the cone of the rogly is performed according to a mathematical relationship. Adjusting elements move the rollers along its axis, and on the supporting conical surfaces of the body there are faces, the number of which is not equal to the number of rollers. The rollers rolling between the conical surfaces of the casing and the surfaces of the workpiece to be processed without slippage (Л due to the chosen angle of the cone of the rollers, deform their ridges on two simultaneously processed surfaces by their forming ones. 2 cf. 4 ;: CO

Description

metals, plastic deformation and can be used to obtain stepped, precisely spaced end, conically convex or concave sealed annular surfaces, in particular, to obtain mutual seats of the head and piston of diesel engines. The purpose of the invention is to expand the technological inks of knurling by treating face or taper surfaces with obtaining a guaranteed distance between it and improving quality. 1 In Fig. 1, a multi-roll is shown for knurling, a general view; in Fig.2, section A-A in Fig.1; FIG. 3 shows an even diagram of the angle of a roller. The knurling consists of a body 1 with supporting conical surfaces and 3, rows 4 and 5 of rolling rollers and their respective separators 6 and In the separator 7, adjusting threads 8 are located along the axis of each roller. The angle of the roller cone is determined (fig. 3) from the slip condition (in the opposite case, the seizures of the rollers are possible) when, 1rD, ITD, (1) uH---. T- or T- - hdi di d, dz where D, and D - diameters of the surface, d, and d - corresponding km of roller diameter, Mm, According to the diagram on, fig.Z where h is the height of the cone machined aemo conical surface. Substituting into the formula (2) from the form P) .5G, we get, ,, .. (Sr-4,) 2 sin-2-1 (0., - D.) 2 + 4h2. d, (Da - Di) «« «ir - Trwv. D, -jT5i - 7) + 4h2 - “4-TOri §tTH4b From the formula it can be seen that when h o, i.e. when machining the end surface, 0 d oL 2 arc sin -. Knurling works in the following way. The rollers 4 (figure 1) process a conical surface, the rollers 5 - end, flat annular surface. Both rows consist of tapered rollers with angles of cones about which are determined by the indicated relation. At the same time, the angles of incidence ie are constant, calculated for this knurling. Accordingly, the bearing surfaces of the knurling - the cone of the body are coaxial and unregulated. The distance between the two-knurled knurling surfaces is adjusted by axial movement of each roller 5 of an additional row by means of adjusting support screws 8. When the taper roller moves in contact with the knurling diameters D, and D, the diameters d and d of the tapered roller become larger. diameter. The rolling rollers, which create the knurling surface, move in parallel in the direction of increasing the distance between this rolling surface and the rolling surface of the main row of rollers. Such adjustment of the distance is necessary because of the different production of two rows of rollers located at different radial distances from the knurling axis, the circumferential speed of the more distant rollers is higher, hence the production is greater. The ability to adjust contributes to restoring the required distance between the knurling surfaces without any machining of the knurling elements, which is economically advantageous compared to the two-step treatment with single-sided knurling or one-step two-way, but unregulated knurling. The knurl is installed by the shank into the machine spindle, for example drilling, coaxially with the workpiece, lowered until the rollers come into contact with the bearing surfaces of the knurling body and the workpiece surfaces being machined, fix the spindle against axial movements and cause it to rotate. The rollers rolling between the conical surfaces of the body and the processed surfaces of the workpiece without sliding due to the chosen angle of the cone of the rollers deform the scallops on two simultaneously processed surfaces with their forming. The axial bearing surfaces of the rollers in the separators at the same time are constant, therefore the relative position of the machined surfaces is constant. Since the contact of the rollers with the supporting surfaces on the casing is intermittent due to the presence of edges on the latter, the rollers receive an additional force impulse due to the change of the trajectory of movement, which ensures the work hardening of the surfaces to be treated, which ensures a guaranteed distance between them. In addition, the number of faces is not equal to the number of rollers and the work hardening occurs evenly over the entire surface to be treated due to the angular displacement of the rollers for each turn of the knurling. During the initial adjustment of the knurling or after the development of the rollers or their support surfaces of the body, the rollers are radially fed using the adjusting screws, controlling the value of this indicator by the indicator on the axial movement of the knurling. The use of the proposed knurling allows you to more accurately process stepped annular face and conical (convex and concave) surfaces with obtaining a guaranteed distance between them. 1 16 Formula, and the first and 1. Multi-roll knurling, comprising a housing with conical bearing surfaces, in which a separator with tapered rollers is located for machining end surfaces, which, in order to expand technological capabilities by simultaneous-processing of the conical surfaces, it is equipped with an additional separator with conical rollers, and additional conical bearing surfaces are made on the body to interact with the conical rollers of the additional separator, n and angle of taper of tapered rollers ei selected from conditions ,, 2arcsin-- ii2 - ::: 2i -, DjCDj - D,) + 4h2 where Dj uB - rolling diameters, in millimeters; d - diameter 11 tapered rollers, mm; h is the distance between the planes of diameters T), mm. 2. Knurling pop 1, distinguished by the fact that it is equipped with adjusting elements installed in an additional separator with the ability to move the tapered rollers along its base. 3. Knurling popp. 1 and 2, which is different in order to improve quality by providing cold working, faces are made on the supporting conical surfaces, and the number of faces is not equal to the number of rollers.

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Claims (4)

Claim 1. A multi-roll knurling, comprising a housing with 5 tapered supporting surfaces, in which a separator with tapered rollers for treating end surfaces is located, characterized in that, in order to expand technological capabilities due to the simultaneous processing of tapered surfaces, it is equipped with an additional separator with tapered rollers, and on the case additional conical supporting 15 surfaces are made for interaction with conical rollers of an additional separator, while the angle of the cone nichical rollers is selected from the conditions of the torii of movement, which ensures the hardening of the machined surfaces, which contributes to obtaining a guaranteed distance between them. In addition, the number of faces is not equal to the number of rollers and the hardening occurs evenly over the entire machined surface due to the angular displacement of the rollers for each knurling revolution. During the initial adjustment of knurling or after the development of the rollers or their supporting surfaces of the casing, it is 20 rev = where D _{ 2. The knurling according to claim 1, characterized by the fact that it is equipped with adjusting elements, a radial feed of rollers with pomoni is installed in an additional separator with adjusting screws, controlling the value of this feed by an indicator of axial movement of the knurling. Using the proposed knurling makes it possible to more accurately process stepped annular end and conical (convex and concave) surfaces to obtain a guaranteed distance between them. the ability to move conical rollers along its axis. 2 arc sin -, dJ (D ₄ - D,) ¹ + 4h ² ' - rolling diameters, mm; - diameter of conical rollers, mm; is the distance between the planes of diameters Do and D ^, mm. 3. Knurling according to claims 1 and 2, which implies that, in order to improve the quality by providing cold work, faces are made on the conical supporting surfaces, while the number of faces is not equal to the number of rollers. Aa FIG. g Compiled by S. Chukaev Editor I. Nikolaychuk Tehred M. Khodanich Corrector A. Zymokosov Order 6523/15 Circulation 740 Subscription VNIIPI of the USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushskaya nab., D. 4/5 Production and printing company, Uzhhorod, st. Project, 4