US 2026/0115867 A1 · SLEEVE-TYPE GRINDING TOOL FOR FINISHING OF ROLLING SURFACES OF BEARING ROLLERS AND A GRINDING DEVICE THEREOF

Abstract

A sleeve-type grinding tool for a finishing of rolling surfaces of bearing rollers and grinding device thereof are provided. The grinding device includes the sleeve-type grinding tool, a main machine and an external circulation equipment. The sleeve-type grinding tool includes a grinding sleeve and a grinding shaft. The grinding sleeve is provided with a set of coaxial annular grooves linear grooves. The external circulation equipment include a receiving device, a feeding device, a storage station, a plurarity of storage bins, and a controlle. During a grinding process, after completing a round of grinding, the bearing rollers are temporarily stored in the storage bins of the external circulation equipment, changing the sequence in which they enter the grinding processing area, then re-enter the grinding processing area, continuously cycling until the specified technical standards are met. the present disclosure can improve the dimensional consistency of the rolling surfaces of bearing rollers.

A sleeve-type grinding tool for a finishing of rolling surfaces of bearing rollers, wherein comprising a grinding sleeve (3) and a grinding shaft (2);

during a grinding process, the grinding shaft (2) passes through the grinding sleeve (3), and the grinding shaft (2) is coaxial with the grinding sleeve (3);
and
an outer circumference of the grinding shaft (2) is provided with a set of at least three linear grooves (25) aligned with the inner peripheral surface of the grinding sleeve (3), where the linear grooves (25) are distributed in a circumferential array, and the axis of a linear groove array is the axis of the grinding shaft (22);
the surface of the linear groove (25) that contacts the bearing roller during grinding is the working surfaces of the linear groove;
and
the bearing rollers refer to the processed bearing rollers, which are cylindrical rollers (11), conical rollers (12), or spherical rollers (13);
the spherical rollers (13) comprise symmetrical spherical rollers without ball base surfaces, symmetrical spherical rollers with ball base surfaces, and asymmetrical spherical rollers with ball base surfaces, while needle rollers are classified as cylindrical rollers (11);
and
cylindrical roller surfaces comprise rolling surface (15) and end surfaces (17) of each cylindrical roller (11), with a geometric reference point of each cylindrical roller (11) defined as a geometric center of the each cylindrical roller (11);
conical roller surfaces comprise the rolling surface (15) and reference end surface (16) of each conical roller (12), where end of each conical roller (12) with the spherical base surface are defined as reference end of each conical roller (12), and a cone angle of each conical roller (12) is denoted as 2φ;
and the geometric reference point of each conical roller (12) is defined as the geometric center of each conical roller (12);
and
when the spherical rollers (13) are spherical rollers without the ball base surfaces, the spherical roller surfaces comprise the rolling surface (15) and the end surfaces (17) of each spherical roller;
when the spherical rollers (13) are symmetrical spherical rollers with ball base surfaces or the asymmetrical spherical rollers with the ball base surfaces, the spherical roller surfaces comprise the rolling surface (15) and reference end surfaces (16) of each spherical rollers, with the ends of the spherical rollers (13) comprising the spherical base surfaces being defined as the reference ends of the spherical rollers (13);
the geometric reference point of each spherical roller (13) is defined as a center of a maximum circular cross section (18) of each spherical roller (13), with a maximum circular section diameter, or a nominal diameter, denoted as D;
and
curvature radius of an axial cross section profile of the rolling surfaces (15) of the spherical rollers (13) is denoted as Rc;
and
when the bearing rollers are cylindrical rollers (11) or conical rollers (12), the grinding shaft (2) is an assembly that comprises a set of at least three grinding strips (23) and a radial expansion component located at a center of the grinding shaft (2), with the linear grooves (25) located on the grinding strips (23);
the grinding strips (23) are solidly connected to the radial expansion component or transition-connected to the radial expansion component via a grinding strip mounting base (24);
the radial expansion component is configured to drive the linear groove array located on the grinding strips (23) to synchronously expand radially outward along the grinding shaft (2) and to transmit torque between a main machine of a grinding device and the grinding strips (23);
and
when the bearing rollers are spherical rollers (13), the grinding shaft (2) is a single shaft-like part, with the linear grooves (25) located on the outer peripheral surface of the shaft-like part;
alternatively, the grinding shaft (2) is a composite component formed by connecting multiple parts, which comprises a base shaft (21) and grinding strips (23) with linear grooves (25), and the grinding strips (23) are solidly connected to the outer peripheral surface of the base shaft (21);
and
an inner wall of the grinding sleeve (3) is provided with a set of coaxial annular grooves (33) of equal diameter, with an axis of the annular grooves (33) being an axis of the grinding sleeve (31);
during the grinding process, groove surfaces of the annular grooves (33) that contact the bearing rollers are working surfaces of the annular grooves;
and
when the bearing rollers are cylindrical rollers (11) or a conical rollers (12), the grinding sleeve (3) is a single sleeve-like part;
and
when the bearing rollers are spherical rollers (13), the grinding sleeve (3) comprises an outer sleeve (37), a set of at least three grinding sleeve strips (36) arranged in a circumferential array at a center of the grinding sleeve (3), and a radial contraction component located between the outer sleeve (37) and the grinding sleeve strips (36);
the annular grooves (33) are intermittently distributed on the inner wall of the grinding sleeve (3), formed by front faces of the grinding sleeve strips (36), with gaps existing between adjacent grinding sleeve strips (36) in the circumferential direction of the grinding sleeve (3) to facilitate the synchronous radial contraction of the grinding sleeve strip array toward the center of the grinding sleeve (3);
the grinding sleeve strips (36) are solidly connected to the radial contraction component, or transition-connected to the radial contraction component via a grinding sleeve strip mounting base;
the radial contraction component is configured to drive the grinding sleeve strip array to synchronously contract toward the center of the grinding sleeve (3) during loading, and to transmit torque between the main machine of the grinding device and the grinding sleeve strips (36);
and
a grinding processing area is formed by a surrounding of the working surfaces of the annular grooves and the linear grooves;
for each annular groove (33), an opening for the bearing rollers to enter or exit the grinding processing area is defined, the opening leads to an upper half of an outer wall of the grinding sleeve (3), the opening serves as the entrance for the bearing rollers to enter the grinding processing area and the exit for the bearing rollesr to leave the grinding processing area;
during the grinding process, the bearing roller enters or exits the grinding processing area through the opening;
during a time of the bearing roller enters or exits the grinding processing area, the grinding process is paused;
and
during the grinding process, a bearing roller is distributed at each intersection of the annular grooves (33) and the linear grooves (25);
the radial expansion component drives the linear groove array, or the radial contraction component drives the grinding sleeve strip array to apply a grinding load to the bearing rollers distributed in the grinding processing area, with the bearing rollers contact with both the working surfaces of the annular grooves and the working surfaces of the linear grooves;
the grinding shaft (2) and the grinding sleeve (3) rotate relative to each other around the axis of the grinding shaft (22), while the grinding shaft (2) also performs a relative reciprocating linear motion along the axis of the grinding shaft (22);
when the bearing rollers are the cylindrical rollers (11) or the conical rollers (12), the bearing rollers rotate around their own axis under the friction drive of the working surfaces of the annular grooves, while the bearing rollers move along the annular grooves (33) and the linear grooves (25) under the pushing effect of the working surfaces of the linear grooves and annular grooves;
when the bearing rollers are spherical rollers (13), the spherical rollers rotate around their own axis under the friction drive of the working surfaces of the linear grooves, while the spherical rollers move along the annular grooves (33) and the linear grooves (25) under the pushing effect of the working surfaces of the linear grooves and annular grooves;
the rolling surfaces (15) of the bearing rollers undergo a relative sliding with the working surfaces of the annular grooves and linear grooves, thus achieving the grinding of the rolling surface (15);
when the bearing rollers are cylindrical rollers (11), the working surfaces of the linear grooves are curved cylindrical surfaces that match the rolling surfaces (15) of the cylindrical rollers;
or initial states of the linear grooves (25) are V-shaped groove surfaces, with the working surfaces of the linear grooves being the two sections of curved cylindrical surfaces formed during grinding due to wear that match the rolling surface (15) of the cylindrical roller;
during the grinding process, the rolling surface (15) of the cylindrical roller makes surface contact with the working surfaces of the linear grooves;
and
when the bearing rollers are the conical rollers (12), the working surfaces of the linear grooves are V-shaped groove surfaces, with the angle between the two side planes of each V-shaped groove denoted as 2θ;
symmetry planes of the V-shaped groove (254) contain the axis of the grinding shaft (22);
during the grinding process, the rolling surfaces (15) of the conical rollers (12) make line contact with the two side planes of the working surfaces of the linear grooves, with small ends of the conical rollers (12) close to a bottom of the linear groove (25);
and
when the bearing rollers are spherical rollers (13), the working surfaces of the linear grooves are cylindrical surfaces that match axial cross section profiles of the spherical roller's surfaces;
during grinding, the surfaces of the spherical rollers make line contact with the working surfaces of the linear grooves;
when the spherical rollers (13) have ball base surfaces, contact lines between the ball base surfaces of the spherical rollers (13) and the working surfaces of the linear grooves pass through the center of the ball base surfaces of the spherical rollers (13);
and
when the bearing rollers are the cylindrical rollers (11), the working surfaces of the annular grooves are annular groove surfaces whose profiles correspond to axial cross section profiles of the cylindrical rollers;
during the grinding process, the surfaces of the cylindrical rollers are line contacted with the working surfaces of the annular grooves;
and
when the bearing rollers are the conical rollers (12), the working surface of the annular groove is an annular groove surface whose profile corresponds to the axial cross section profile of the conical roller;
during grinding, the surface of the conical roller makes line contact with the working surface of the annular groove, and the contact line between the spherical base surface of the conical roller (12) and the working surface of the annular groove passes through the center of the spherical base surface of the conical roller (12);
when the bearing rollers are the spherical roller (13), the working surfaces of the annular grooves are annular groove surfaces whose axial cross section profiles are arc, with the radius of the arc equal to a maximum circular cross sectional radius of the spherical rollers (13);
during the grinding process, the rolling surfaces (15) of the spherical rollers make crossed line contact with the working surfaces of the annular grooves;
and
by placing the bearing rollera as references within the linear grooves (25) and maintaining the contact state during the grinding process, the geometric reference points of the bearing rollers within a same linear groove (25) lie on a same line, referred to as a linear groove baseline (251);
when the bearing rollers are the cylindrical rollers (11), the axes (14) of the cylindrical rollers (11) lies on the linear groove baseline (251);
when the bearing rollers are conical rollers (12), the axes (14) of the conical rollers (12) intersect the linear groove baseline (251) at an angle denoted as γ, with sinφ=sinγ·sinθ;
and all the linear groove baselines (251) lie on the same cylindrical surfaces, referred to as a grinding shaft base cylindrical surface (252), which is coaxial with the grinding shaft (2);
and
by placing the bearing rollers as references within the annular grooves (33) and maintaining the contact state during grinding process, the geometric reference points of the bearing rollers within a same annular groove (33) lie on a same circumference;
the circumference is referred to as an annular groove baseline (34);
all the annular groove baselines (34) lie on a same cylindrical surface, referred to as a grinding sleeve base cylindrical surface (341), with a radius of the grinding sleeve base cylindrical surface (341) denoted as R0;
when the bearing rollers are the spherical rollers (13), the axes (14) of the spherical rollers (13) are tangent to the annular groove baseline (34) at a center of the maximum circular cross section (18) of the spherical rollers (13), and the radius of the grinding sleeve base cylindrical surface (341) is R0=Rc−D/2;
and
during the grinding process, the grinding sleeve base cylindrical surface (341) coincides with the grinding shaft base cylindrical surface (252).

74 more elements

Sleeve-type grinding tool for finishing of rolling surfaces of bearing rollers and a grinding device thereof

Life of this patent

Sleeve-type grinding tool for finishing of rolling surfaces of bearing rollers and a grinding device thereof

Life of this patent

Abstract

Claims5