RU26996U1 - DEVICE FOR TREATMENT OF FLAT SURFACES BY PLASTIC DEFORMATION - Google Patents

Abstract

A device for treating flat surfaces by plastic deformation, comprising a housing on which a thrust ring is pressed with a raceway corresponding in cross section to the shape and dimensions of the deforming elements rolling along it uniformly, characterized in that the deforming elements are made in the form of hollow balls having the ability to a certain load to change its shape, respectively, the shape of the raceway, made in cross section in the form of a segment of an ellipse.

Description

DEVICE FOR PROCESSING PLANE SURFACES BY PLASTIC DEFORMATION

2002114128

The utility model relates to metalworking, namely, the processing of metal surfaces of machine parts to surface-plastic; i; e4) opAjiq:) OBa.TOieM (PPD) t-g can be used for jointing and simplifying surface treatment of metal blanks, in that chryule with 1 covered1 yapup1 razl gpugo tgta.

A device is known for processing flat ruled surfaces of parts comprising a housing with a disk fixed on it., Onto the end face o the surface of which is supported and rolled onto which deforming elements in the form of monolithic balls are uniformly spaced around the circumference in the holders of the holder holding them (SU, ed. St. N2 494241, CL b24 B39 / 00, 1973). Due to the point contact between the surface of the deforming elements (balls) and the end working surface of the disk surface, the containers are able, due to a special device, to make the axis of movement of the drive along with the clip in the radial pagetzavlesh, thereby increasing productivity and quality of processing. However, due to the point contact of the surface of each ball with the working surface of the disk and the significant static and dynamic stresses of the balls and other components during operation, these details are due to HIGH KP1X contact1lx voltages in their material, they quickly wear out and the durability of the device it is small, and the design of the device does not allow the T11 OS; it is quick to disassemble it to replace the parts that may be worn. In addition, due to the complex movement of the balls during operation at certain processing modes, vibrations (self-oscillation-sh) of the device parts may occur, which will lead to a deterioration in the quality of the processed surface.

For the most technical reason, it is a device for processing miocKiLx surfaces, containing a wrinkle / s, on which a pressure ring is pressed} with a raceway along the surface of which elements are rolled (monolithic balls) uniformly located in the end sockets of the separator rotating freely on a podidigdak (Odg-shtsov L.G. Hardening and finishing of parts by surface plastic deformation: Handbook. - M: Mash1Shostroenie, 1987, p. 63-65). Moreover, the raceway across the cross-section is a radius segment krz / ha, in PI shape corresponds to the size of the balls, we roll over its surface. This makes it possible to ensure the least contact between the surface of the balls and the surface of the race track of the ring ring, which contributes to a more even distribution of the load on the surface of these parts, in the zone of their contact and contact stress 1X of the stresses in the material of these parts.

Any other factors will contribute to a smaller Goyo of balls and a feather ring, increasing the overall durability of the building. However, in view of the considerable stiffness of the balls and the thrust ring and, as I rightly believe, the lack of regulated technical requirements for the geometric dimensions of the i-i shape of the rocker path, a constant full contact of the ball surface across the entire width of the surface profile of the raceway of the thrust ring for a full separator revolution is impossible. This will lead to a local increase in the contact stresses in the material of the balls and the thrust ring, which will contribute to their quick, easy loading and breaking, loss of operability of the device as a whole. The co-operation of this device, just as the previous one, does not allow for quick replacement of the parts, which will contribute to a costlier processing process. At the same time, due to the migra- tion of contact points of the surface of deforming elements with the surface of the track kachent-sh along its width, vibrations (self-oscillations) of the balls and the entire device can occur, which will lead to a deterioration in the quality of the processed surface and to eule more intensive wear of the parts of the device. As a result, processing performance will be reduced. Yes; there is a greater likelihood of repeated vibrations when processing various types of guitars using this device. For example, the coatings crawled / caked by the method of electrospark alloying (ESA)., With the parameters of the process becoming more universal, 1 they have an inhomogeneous hardness of their own} L1astka. This will lead to tomg that deforming elements during processing of the alloyed surface will penetrate into the surface of the part at a greater depth than that, which will cause vibrations. First of all, the oscillations will mainly be directed along the OCPI of the rotary device, that is, the perpendicularly machined surface, which will inevitably lead to an increase in its roughness and waviness.

The technical task to which the utility model is directed is to improve the quality of the machined surfaces of the parts. higher processing manufacturers and increased durability of the D.T1YA device under flat surfaces due to the even distribution of wiring elements between the deformation surface of the WG surface and the raceway of the thrust ring in the contact zone of the wc contact area, as this is caused by the high contact voltage Matergale ETREX PI PIK parts vibrating gear-g (self-oscillating).

A means of completing the task posed is that in a leveling device for processing 1 wide surface of the PPD containing a body on which a third wall is pressed in, with a rocking track representing itself ID in an intersected section-shaped circle segment corresponding in size to PE deformable to elements that roll over along its surface, evenly spaced around the circumference in the cone sockets of the separator freely turning around on the subassembly, nppi this is used as a deformation of other elements hollow balls, and the shape of the paths of the caterpillar in the transverse direction is pulled in the form of an ellrpts segment and allows

due to the resistant deformation of the hollow balls, melt the 1HC shape to the shape of an elliptical shape and ensure stable, stable contact with the melts of the GC by Bertsnost on all their stuff.

The essence of useful modeling is illustrated in the drawing. On FGGL, an axial GG section is shown, and on Fgal2, a design scheme for determining the dimensions of the quality paths for deforming elements is deformed.

The device decays 1 with a thrust ring 2 pressed onto it, containing a rolling element 3, along which deforming elements roll in the interior of the hollow balls 4, evenly spaced around the circumference in the conical slots of the separator 5, which rotates freely on the ball-bearing unit 6, mounted on the lower end body and retained by a washer 7 with a screw 8, which abuts against the clamping screw 9. The shank 10 moves along the top 1 cylinder of the 1st part of the housing. Movement of which the axial guide shaft is installed it has a pin 11, which moves along the groove 12 of the housing. Defor l1p} .1shppe elements at a given load created by the spring 13 change their shape accordingly to the raceway.

The device works a trace of a skinny: image. The shank 10 of the device is installed in an adapter (not shown), which, in turn, is installed in the machine. The device brings deformM1-S-1 Щ11МР1 element 4 to the surface of the part 14 to be machined, which is fixed on the table of the machine 15, Pruzhrsha 13 is compressed to the required velkhina, which provides the specified load P for each deformation element 4. By the load, the hollow ball 4 is deformed by a value of 3 and takes on the form of an ehpppPtsoid 16 (ellipse in cross section). The load from the compressed spring 13 to the deformation elements (hollow balls) 4 is transmitted through the housing 1, the resistant contact, Ш) Цо 2 and the surface of the raceway 3. B. due to the fact that the shape of the raceways in the cross section is made in the form of an e-section with depth h and width B., and the value of the current coordinate of the points of the profiled surface of the raceway Xi is determined on the basis of the hollow balls 4, their initial diameter DW and the specified interval of the current coordinate at the points of the schzofria of the raceway in the heating of the Y axis, between Between the surface of the protruding deformed elements (hollow balls) 4 and the surface of the raceway 3 there is a constant full cervical contact throughout the entire track. This contributes to a uniform distribution of the load between the deformation surface of the elements and the superficiality of the raceway of the bearing ring in the PIX contact zone, which eliminates the high local contact stresses in the material. These parts also have less wear and tear, and as a result , to increase: increase the durability of the entire device. In view of the comfy straight-fitting 1-1 surfaces of the deforming elements 11 4 to the surface of race track 3, the first ones will receive a certain and stable position during operation. This makes it possible to exclude the occurrence of vibrations (self-oscillation1)

parts of the device and thereby improve the quality of processing, its durability and at the same time to impose a shift of parts of the device. In the non-uniform hardness of the surface of the detag, nagscher., In the case of processing of coatings, null-scratch by the ZIL method, the deforming elements, due to their ynp TocTii, process the surface sections with different hardness without opening the stitch joint surface de () 01) Ш1р 1 General element - track surface kachenr1ya.This allows you to run uninterested load between the deforming elements and will frighten the possible occurrence of vibratra-EI in the processing process, which helps to reduce the roughness and waviness of the treated 1YBE} ) hyost detail. After the spring 13 is compressed to the required weight and the deforming elements 4 come into contact with the surface of the machined part i4, the rotation of the machine spindle and the hearth shaft are rotated. Rotation from ilpshde.lya machine through the adapter is transmitted to the TAIL 10, and from it through the pin 11 to the housing 1, the pressed thrust ring 2 and then to de (|) normal 1О1Щ1е elements 4, wraps around the protective surface of the child-g 14. During processing, the deforder the elements entrain the separator 5, which maintains a predetermined head distance between the airshow. The developed device is easy to disassemble, which facilitates its easy operation and repair.

The geometric dimensions of the paths of the kachenerga in the transverse cross section, and its depth i and the value of the current coordinate X {the points of the surface profile in the direction of the X axis are determined by the IDs of expressions (1) and (2):. (1)

if Dw 1 I. I -y - j (DH. - S} K {(Dw -) - ..,.,

where Kj, is the coefficient of the rocking track (71.15-0.2); Dw is the strain gauge deformrfZT01sche of elements (balls) in an unloaded state (P 0), mm; S - Veshrpia deformation balls at a given load P PS (determined based on the analytical Hertz dependences), mm; y is the value of the current coordinate of the points u of the surface of the raceways in the cross section in the direction oi of the y axis, mm.

The interval for changing the variable y is in the sections defined by the system of inequalities (3)

y, in I V. в - / 7 I

Two tests were carried out with two devices containing deformations 1 and 31) 1 piece elements in the form of balls that rolled over the surface of the track, made in a thrust ring. The first device is basic. It contained deformable elements in the form of Moiiojntnrbix steel balls, which rolled along the top surface of the raceway, which had a cross section in the form of a radius radius segment, and modeled the work of npOTOTi ma. The second device, the proposed one, contained hollow steel balls as deforming elements, which rolled over the surface of a raceway, which had in cross section the shape of an ellipse segment.

(:;) a sample was machined) of cast iron grade СЧ24, with a hardness of ИВ 170 ... 190 with a size of 300x110x40 mm, ground to 67-0.7 microns and hardened by the ER1L method. As a material, I’m dying; his electrodes were made of an electrographite marker DE-24, and a specially developed transistor generator was used as an electric emitter generator. When processing samples by the PPD method using general generators, it is used. Ш) The console-milling machine mod. 6P12.

The characteristics of the sample surfaces are shown in Table I. The technical characteristics of devices for processing flat PPD surfaces (basic and proposed) are shown in Table 2, sample processing modes in Table 3. The surface parameters of samples processed with the use of ETRH devices are shown in Table 4 , and the achieved performance indicators of the PPD process are shown in table 5.

From tabs. 4 and 5 it is seen that the proposed device for PPD surfaces according to the best and the sign of the residual stresses studied in the surface layer of the samples is thicker; there are no deformable coatings that are thinner than the device, but with respect to roughness parameters surface-treated PI in terms of the characterization of the process of the process: competitiveness, resistance to deformation of DC elements, surpasses it.

Less than this device allows you to get surfaces with a rough roughness rg vshushosti, with large values of rm relative to the relative thickness of the mouth of the zofrsha, the average pitch of irregularities of the profile and VN.PNISTOSTRG, that b. Thus, having performed the first comparative tribotechnical tests above atomized samples processed with the help of the proposed device, we showed an increase in the resistance of PC by 25-30% relative to the samples processed by the device, which modeled the operation of protrusion. The use of this device for the processing of steel PI pig-iron sliding sliding metalworking equipment allows to increase their wear resistance by 1.6-2.0 times. Poivazatega Note-ya: Zaacheshtya indicators obtained by the results of measurements of control points.

TexiupiccKiie characteristics of devices for processing Japanese surfaces PPD

Table 2 11 a {gamemeters of the alloyed surfaces of the samples Table 1 of the parameters listed in the table of surfaces of 3 samples in 2

Regimer processing experimental samples

Table 3

Note; Values of parameters shown in the table crawled gergs according to the results of measurements of the surfaces of 3 samples at 2 control points.

Achieved performance indicators of the PPD process

Table 5 t of parameters processed by PPD surfaces of samples Tabadas 4

Claims (1)

A device for treating flat surfaces by plastic deformation, comprising a housing on which a thrust ring is pressed with a raceway corresponding in cross section to the shape and dimensions of the deforming elements rolling uniformly over it, characterized in that the deforming elements are made in the form of hollow balls having the ability to a certain load to change its shape, respectively, the shape of the raceway, made in cross section in the form of a segment of an ellipse.