SU859129A1

SU859129A1 - Apparatus for finishing plane surfaces

Info

Publication number: SU859129A1
Application number: SU792775238A
Authority: SU
Inventors: Виктор Михайлович Проценко; Сергей Петрович Никитин; Владимир Ильич Поляков
Original assignee: Предприятие П/Я А-1872
Priority date: 1979-06-04
Filing date: 1979-06-04
Publication date: 1981-08-30

Description

УСТРОЙСТВО дл доводки плоскихDEVICE for finishing flat

(54)(54)

ПОВЕРХНОСТЕЙSURFACES

Изобретение относитс к абразивной обработке металлов и может быть использовано дл доводки плоских поверхностей пластинообразных деталей.The invention relates to the abrasive treatment of metals and can be used to finish the flat surfaces of plate-like parts.

Известно устройство дл доводки плоских поверхностей деталей, содержащее нижний и эксцентрично вращающийс верхний диски, между которыми размещаютс обрабатываемые детали, установленную с возможностью плоскопараллельного движени обойму и закрепленное на одном из дисков (нижнем) ограничительное кольцо (1.A device for finishing the flat surfaces of parts is known, comprising a lower and eccentrically rotating upper disks, between which machined parts are placed, mounted with a plane-parallel movement of the yoke and fixed on one of the disks (lower) restrictive ring (1.

В указанном устройстве между обоймой и доводочными дисками осуществлена фрикционна св зь. Характер св зи позвол ет получить верхнему доводочному диску дополнительное перемещение в относительном движении в виде вращени вокруг своей оси. Величина скорости этого относительного движени носит переменный характер при посто нной скорости вращени эксцентрика, завис щий от сил трени между рабочими поверхност ми доводочных дисков и детал ми , измен ющихс в св зи с измельчением абразивных зерен в процессе доводки, от величины удельного давлени на поверхности обрабатываемых деталей, от величины эксцентриситета и р да других факторов. При этом указанное изменение скорости относительно движени оказывает отрицательное вли ние на стабильность качества обработанных поверхностей деталей и на равномерность износа доводочных дисков. Кроме этого, внутреннее неподвижное ограничительное кольцо, играющее в процессе доводки пассивную роль (преп тствует попаданию деталей в центр нижнего диска, где они имеют тенденцию к потере подвижности), снижает производительность доводки и также In the specified device, a friction link is made between the holder and the finishing disks. The nature of the connection allows the upper finishing disc to receive additional movement in relative motion in the form of rotation around its axis. The magnitude of the speed of this relative movement is variable at a constant speed of rotation of the eccentric, depending on the frictional forces between the working surfaces of the finishing disks and parts, which change in connection with the grinding of abrasive grains during the finishing process, on the specific pressure on the surface details of the magnitude of the eccentricity and a number of other factors. Moreover, this change in speed relative to movement has a negative effect on the stability of the quality of the machined surfaces of the parts and on the uniformity of wear of the finishing discs. In addition, the inner stationary limiting ring, which plays a passive role in the process of refining (prevents parts from getting into the center of the lower disk, where they tend to lose mobility), reduces the performance of refining and also

10 способствует - неравномерному износу доводочных дисков.10 contributes to the uneven wear of the finishing discs.

Цель изобретени - повыщение качества обработки.The purpose of the invention is to increase the quality of processing.

Поставленна цель достигаетс тем, что 15 доводочные диски св заны с обоймой посредством зубчатых венцов, выполненных на внутренней поверхности обоймы и периферии дисков, а ограничительное кольцо закреплено на верхнем диске.The goal is achieved by the fact that 15 finishing disks are connected to the holder by means of gear rims on the inner surface of the holder and the periphery of the disks, and the restrictive ring is fixed on the upper disk.

На чертеже изображено предлагаемое The drawing shows the proposed

20 устройство, разрез.20 device incision.

Claims

The device has a bottom lapping disc 1 with an outer ring gear 2, an upper disk 3 with a similar ring gear 4, eccentrically connected to the machine spindle with a cone 5, and mounted with the possibility of plane-parallel motion relative to the finishing disks 1 and 3 clip 6 with teeth 7 on its inner surface, through which it is connected to the periphery of the finishing 1 n 3 discs. In this case, the gearing system of the device is a planetary mechanism in which the disk 1 is the sun wheel, and the holder 6 and the disk 3 are satellites. A restrictive ring 8 is fixed in the center of the disk 3, and between disks 1 and 2 there is a cassette 9 rigidly connected to the holder 6, and the workpiece 10 is installed in the indicated cassette or directly between the surfaces of the finishing disks. Before processing, the abrasive paste is applied to the finishing discs. The device works as follows. With the same number of teeth, the relative speed of movement of the upper finishing disc 3 is zero. In this case, each point of the finishing disk 3, when moving, describes an identical trajectory with respect to the Lower disk 1, which contributes to uniform wear of the internal disks 1 and 3. The restrictive ring 9 at the same time describes the circular trajectory and actively influences the finishing process. The details with respect to the finishing disks 1 and 3 describe the same trajectory in size and character — an extended epicycloid at any contact area. In addition, each abrasive grain on any part of the disks 1 and 3 and parts 10 for a certain period of time passes the same way, thus doing the same work on the removal of metal from the surfaces of the parts. The uniform distribution of the work of the abrasive grains ensures uniform removal of metal from the surfaces of the finished parts, as a result of which the deformation of thin-walled parts is significantly reduced, the quality of the finished surfaces is stabilized and improved. The invention includes a device for finishing flat surfaces containing lower and eccentrically rotating upper disks, one of which has a restrictive ring fixed on it and installed with the possibility of plane-parallel movement and interaction with the periphery of the disk holder, characterized in that to improve the quality of processing, gear rims are made on the periphery of the disks and the inner surface of the cage, and the restrictive ring is fixed on the upper disk. Sources of information taken into account in the examination 1 USSR Author's Certificate No. 544541, cl. B 24 B 37/04, 1975.