摘要:
There are provided: a linear motion guide device, which enhances workability of raceway surfaces and is capable of reducing production cost; and a production method for the linear motion guide device. For this purpose, a linear motion guide device includes a guide rail (1), a slider (2), and a plurality of rolling elements (4), and the guide rail (1) and the slider (2) individually have raceway surfaces (11, 21), which form a rolling path (3) of the rolling elements (4), at positions opposite to each other. Then, the rolling elements (4) are disposed in the rolling path (3), and the slider (2) moves with respect to the guide rail (1) via the rolling elements (4). The raceway surface (21) of at least one of the slider (2) and the guide rail (1) is composed of: a first raceway surface (21A); and second raceway surfaces (21B) extending on both sides of the first raceway surface (21), and surface roughness of the second raceway surfaces (21B) is set rougher than surface roughness of the first raceway surface (21A).
摘要:
A bearing comprising a plurality of rolling elements arranged between an inner raceway (12) and an outer raceway (22) of the bearing, whereby a rolling contact interface is defined between a first rolling contact surface (31) on at least one rolling element and a second rolling contact surface formed by one of the inner and outer raceways (12, 22). The first rolling contact surface has a first RMS roughness R q1 and has a first roughness pattern y i , expressed in terms of the Peklenik number y. The second rolling contact surface has a second RMS roughness R q2 and has a second roughness pattern y 2 . To minimise micropitting in the bearing, the rolling contact interface has a surface topography in which: - the roughness pattern of the first and of the second rolling contact surfaces are oriented in the direction of rolling, whereby γ 1 ≥ 3.0 and Y 2 ≥ 10.0; and - the first and of the second rolling contact surfaces have substantially equal roughness heights, whereby 0.8 q1 /R q2 ≤ 1.25
摘要:
Problem to be solved by this Invention is to manufacture an Actual Four Point Contact Ball Bearing which reduces a self friction of Bearing by 50% in compared to Deep Groove Ball Bearing. Actual Four Point Contact Ball Bearing comprises an inner race (b1), an outer race (a1), balls (d1l) & cage wherein inner race & outer race have a groove made up of two circular arcs forming a Gothic arch in which Balls are accommodated &kept in position with the help of cage. In this invention the balls have a point contact at 35° (c1) with races in groove forming a gothic arch. Actual Four Point Contact Dresser comprising a Base, a Stand, a Handle, a Bearing Assembly, a Cylinder, a Piston, a Gothic Arch Guide Plate, a Lever and a Diamond which in operation dresses a Grinding wheel in Gothic Arch Formation resulting in Grinding of Gothic Arch Grooves of Outer & Inner Races of Actual Four Point Contact Bearing.
摘要:
A method of grinding a workpiece with a grinding wheel is provided wherein the shape of the wheel is distorted in a predetermined manner during grinding by changing the speed of rotation of the wheel. This deformation of the wheel during grinding is employed to impart a desired shape to the surface of the workpiece. A grinding wheel is also provided which is asymmetric in side view to adapt it for use in accordance with the method.
摘要:
When both the outer race tracks (10c, 10b) of an outer race (2b) are to be ground where the diameter (DB1) of the first outer race track (10c) is larger than the diameter (DB2) of the second outer race track (10b) (DB1> DB2), a method of introducing a grinding tool (12) into the inside of the outer race (2b) easily is realized. As shown by (A)→(B), the grinding tool (12) is introduced into the inside of the outer race (2b) through an opening, out of the opposite openings of this outer race (2b), that is closer to the first outer race track (10c), whereby the above problem is resolved.
摘要:
Die Erfindung betrifft eine Vorrichtung zur mechanischen Finishbearbeitung von sphärischen Flächen an rotationssymmetrischen Werkstücken, insbesondere Wälzlagerringen. Die Vorrichtung umfasst ein Gehäuse (9), in dem eine Hohlwelle (10) drehbar gelagert ist, eine Oszillationswelle (11), die in der Hohlwelle (10) drehbar gelagert und an einem Ende mit einem Werkzeugträger (5) verbunden ist, einen Oszillationsantrieb (12), der die Oszillationswelle (11) in kurzhubige Oszillationsbewegungen versetzt, und einen auf die Hohlwelle (10) wirkenden Schwenkantrieb (13), der langhubige Oszillationsbewegungen der Hohlwelle (10) erzeugt. Der Oszillationsantrieb (12) ist auf einem mit der Hohlwelle (10) verbundenen Träger (14) angeordnet und weist erfindungsgemäß eine Verstelleinrichtung (15) auf, mit der der Hub der kurzhubigen Oszillationsbewegungen verstellbar ist. Als Schwenkantrieb ist ein NC-gesteuerter Servomotor vorgesehen, der vom Schnitthub unabhängige langhubige Oszillationsbewegungen der Hohlwelle (10) erzeugt.
摘要:
With respect to an outer ring 2b in which a diameter D B1 of a first outer ring raceway 10c is greater than a diameter D B2 of a second outer ring raceway 10b (D B1 > D B2 ), a method is realized which facilitates the entry of a grinding tool 12 into an inner side of the outer ring when these both outer ring raceways 10c and 10b are subjected to a grinding process. As shown in (A) to (B), the grinding tool 12 is made to enter the inner side of the outer ring 2b through an opening on a side close to the first outer ring raceway 10c between the openings at both ends of this outer ring 2b. This resolves the above-described problem.
摘要:
A manufacturing facility and a super finishing apparatus for ball bearings. The detection part of a matching device (32) is connected to a control means (6) formed of a computer so that detection signals indicating the measured values of the diameters of the outer ring raceway tracks and the inner ring raceway tracks of the ball bearings can be transmitted to the control means. Also, a second grinding device (24) for outer ring, a superfinishing device (25a) for outer ring, a second grinding device (26) for inner ring, and a superfinishing device (28a) for inner ring are connected to the control means (6) so that these devices can receive control signals from the control means. Based on the measured values of the diameters of the outer ring raceway tracks and the inner ring raceway tracks measured by the detection part, the control means (6) provides a shift amount to a diameter machining target value set in the grinding device (24) (or 26) and the super finishing device (25a) (or 28a) for machining the raceway surfaces of the races of at least one of the outer and inner rings.