UA99707U - METHOD OF BILATERAL GRINDING OF THE END OF THE NON-ROUND DETAILS - Google Patents

Abstract

The method of two-sided grinding of the ends of non-circular parts involves the use of two oriented rotating circles, which are filled simultaneously with two diamond pencils, the axes of which move around the circumference, the feed drum with parts and symmetrically arranged pencils. The part in the drum is arranged so that the plane passing through the axis of symmetry of the square and the axis of rotation of the drum is parallel to the side of the square.

Description

The useful model belongs to mechanical engineering and machine tool construction and can be used when grinding the ends of finite dimensions, Z-facets, 4-facets, 5-facets, non-rewindable plates and other non-round parts.

A known method of grinding the ends with crossed axes of the part and the circle (Pasov G.V.

Increasing the accuracy of grinding the ends due to the orientation of the profile circle and taking into account its current wear: Autoref. thesis Ph.D. - Kharkiv, 2000. - 16 pp.). The disadvantage of this method is that there is no calibration section of the circle.

There is a known method of simultaneous grinding of two ends of cylindrical parts, it is the closest, it was chosen as the closest analogue (Patent Mo 10636 Ukraine, MPK B24B 5/04. A method of simultaneous grinding of two ends of cylindrical parts / V.V. Kalchenko, O.V. Zhadan; publ. 11/15/2005, Bull. Mo 11, 2005). This method has a section for roughing and finishing, it includes a combined adjustment of the grinding wheel. The disadvantage of this method is the processing of only cylindrical parts.

The task of the useful model is to increase the accuracy of grinding the end surfaces of non-round parts.

The problem is solved by the fact that in the method of two-sided grinding of the ends of non-circular parts, which includes the use of two oriented rotating circles, which are filled simultaneously with two diamond pencils, the axes of which move around the circumference, a feed drum with parts and symmetrically located pencils, according to a useful model, the part in the drum are arranged so that the plane that passes through the axis of symmetry of the square and the axis of rotation of the drum is parallel to the side of the square.

And also by the fact that grinding the ends of non-round parts with a rectangular profile, the plane that passes through the axis of symmetry of the rectangle and the axis of rotation of the drum is parallel to the smaller side of the rectangle.

In addition, when processing Z-sided, 5-sided unturned plates, the plane that passes through the axis of symmetry of the plate and the axis of rotation of the drum is parallel to the projection of the minimum height of the plate on this plane.

The drawing shows the calculation scheme for grinding the ends of non-round parts.

The drawing shows the following positions: 1, 2 - grinding headstocks, 3, 4 - grinding wheels, 5 - product feed drum, 6 - sleeve, 7 - workpiece, 8 - diamond pencil, 9 - spherical joint, relative to which the wheels rotate.

The scheme of the process of two-sided grinding of the ends of non-round parts is shown in the drawing, where the blanks 7, fixed in the bushings 6 of the product feeding drum 5, are ground by the grinding wheels 3, 4, which are turned to the optimal angles, of the grinding heads 1, 2.

The rotation of the grinding wheels 3, 4 to the angles U and 7 occurs relative to the spherical joints 9.

There is a diamond pencil 8 in the sleeve of the product feed drum, which guides the grinding wheel.

Grinding headstocks together with grinding wheels are oriented to the angle U in the vertical plane and to the angle t in the horizontal plane. When processing the ends, the orientation angles are selected so that the workpiece does not touch the calibration areas of the grinding wheels when removing the rough allowance.

To obtain a calibration area on the end of the circle, a combined adjustment is required. With the help of a special device, the entire end surface is straightened in a plane perpendicular to the axis of rotation of the circle. After that, a section of the circle adjacent to the outer diameter is corrected with a diamond pencil fixed on the drum for the circular feed of the workpieces to the processing area, as a result of which a calibration section is obtained, which at the entrance does not participate in cutting the allowance and is protected by guides. The black allowance is cut in the central area. During grinding, the parts are constantly moving into the narrowing zone. The final accuracy is formed by the calibration area at the exit from the processing zone.

The forming function of the machine tool is used to develop mathematical models of the most important characteristics of the grinding process. It is an analytical dependence that connects the movement of the links of the forming system with the trajectory of the movement of the tool points relative to the processed part in the part's coordinate system.

The calibration section of the end of the tool during its profiling on the machine is described by the dependence -

A;(bvB.,0) - M6(6)- MI(- Kho). MB(y) - MA(y). MAH )- "M(he)-ma(2o)-Me(-o5). M(Av). 24 0)

where Ov, 8. parameters of the surface of the cutting tool, which are responsible for the angular and radial position of the point of the working surface of the circle;

MI, Mag, MMZ MA, M5 Mb - matrixes of transformation of coordinate systems that simulate translational movement along coordinate axes and rotations around them; b. 0006, 0779 - dimensions that determine the position of the center of the spherical finger in relation to the feed drum and the working plane of the circle; y, x - orientation angles of the grinding headstock in the horizontal and vertical planes;

NB. the radial size of the location of the axes of the workpieces in the feed drum; с ИЙ е4 - (0001) - the radius vector of the top of the diamond pencil for correction, which coincides with the origin of the coordinates.

The forming model of the machine tool describes a family of tool surfaces in the coordinate system of the part

Adi(Ok,Ov,9) - MIS Vv)- Mb(Ok )- M3(- 76 )- M(- Kho). «me(- ho) Ma(- y) MB(- y). Mb(X o). And (Ov, 6) e de Ok. angular coordinate of the position of the workpiece center relative to the circle coordinate system.

The entire surface of the calibration area takes part in the shaping of the end of the workpiece, but the final accuracy can be formed by the circle of the smallest radius tp, the largest radius Nlah or the line of contact of the workpiece with the circle.

The radius vector of the characteristic on the form-forming part of the end surface of the circle is determined from equation (2), taking into account the relationship equation for one-parameter envelopment. oAd(bk,ov,6) oAd(bk,bv,6). OA d(bk,Ov,6) -- -- I I J 2» s Z 2 25- 535- 5 5 5 5x ------l14 x ---- 1 '- 0 ok dB 28 | (3)

The equation of the surface, which is formed during the movement of the minimum circle, can be obtained from equation (2), substituting into it the coordinates of the points of the circle instead of the radius vector of the surface. what

Ad(bkoo)- me(k-ok)-miS Av)-me(ok )-M(- 75 )-M(- Kho). M2(- Kho): "mass y)-MB(- y). Mi (Ho). Me()-MI(Ativ )- MZ(A ip ). 64 How

The equation of the surface, which is formed during the movement of the maximum circle, can be obtained from equation (2), substituting into it the coordinates of the points of the circle instead of the radius vector of the surface.

Adibk,0)- Mb(k- Ok )-MIS- Av )-Mb(Ok )- M3(- 2 )-M(- Xe )- M2(- Xe): "ma(-u)-MB( y ). MIH )-Me(0)- MA tah )- MU(I ah )- 6" 8)

Coo)

To ensure the greatest accuracy of the end face, the orientation of the part is chosen so that the plane that passes through the axis of symmetry of the non-circular part and the axis of rotation of the drum is parallel to the projection of the minimum height of the part.

A useful model can be applied in the fields of mechanical engineering and machine tool construction.

Claims (3)

USEFUL MODEL FORMULA 1. The method of two-sided grinding of the ends of non-round parts, which includes the use of two oriented rotating wheels, which are fed simultaneously by two diamond pencils, the axes of which move around the circumference, a feed drum with parts and symmetrically located pencils, which is characterized by the fact that the part in the drum is arranged so that so that the plane that passes through the axis of symmetry of the square and the axis of rotation of the drum is parallel to the side of the square. 2. The method of two-sided grinding of the ends of non-round parts according to claim 1, which differs in that when grinding the ends of non-round parts with a rectangular profile, the part is arranged so that the plane passing through the axis of symmetry of the rectangle and the axis of rotation of the drum is parallel to the smaller side of the rectangle. 3. The method of two-sided grinding of the ends of non-round parts according to claims 1, 2, which is distinguished by the fact that when processing 3-sided, 5-sided non-turning plates, the part is arranged so that the plane that passes through the axis of symmetry of the plate and the axis of rotation of the drum is parallel projections of the minimum plate height on this plane. и чи ей з : : кю е к 7 5: Я кож ой и о Кк : : | heaven 4 "V t . I | SHE bo 00 i AK, m a, y ni i u nn a kna KE 4 more on oh Ne CHI Sha Her i oyu OK u Ei 1. ts Moy rylo same TK IZ mya shi shi yan Vani Ku SCHE dk p KAK y I u ! would I op shi shi shi: y svy en NN u ie ! pu What ih in EN: y y write nn po zi NN mm m ! Ash m. PALYU AS rr p more . ree more Ж : still НИ: K-t ve | dy я ой : ХУ : OK z y Ba Я Y Эй я я : х Я : и! I Ще С и и 1 v. N rey : Кк . : и 7 t shi shen tu ; sho ! IYA Ash bo E I shk OY How I N is 7 more . shiy