CN2505234Y

CN2505234Y - Magnetic equalizing star lapping machine

Info

Publication number: CN2505234Y
Application number: CN01267321U
Authority: CN
Inventors: 宁光昌; 刘晓同
Original assignee: BEIJING ELECTRICAL PROCESSING INST
Current assignee: BEIJING ELECTRICAL PROCESSING INST
Priority date: 2001-10-08
Filing date: 2001-10-08
Publication date: 2002-08-14
Anticipated expiration: 2011-10-08

Abstract

The utility model relates to a magnetic equalizing star lapping machine which comprises an abrasive disk, a center gear, a maintaining frame, a planet gear and a rack, etc. A clamp, which is inlaid with a permanent magnet, can float in axial direction, but can not turn, is arranged in an axial hole of the planet gear, the clamp and the planet gear can not conduct magnetism, so the strong magnetic field of the magnet absorbs and presses a slice-shaped workpiece on the surface of the abrasive disk through the end face of the clamp, providing positive pressure; the rotation and revolution of the planet gear drive the clamp and the workpiece to move flatly in complex orbits; since each workpiece is pressed by an independent magnetic clamp, each workpiece being abrased at the same time gets equal pressure and is pressed on the abrasive disk; the precision and stiffness requirements of the machine can be reduced while the productivity and finished product rate can be increased.

Description

Magnetic force even pressure type star lapping machine

The present invention relates to a kind ofly workpiece be applied the grinder of normal pressure, be used for slightly grinding or lappingout processing of sheet-like workpiece, belong to field of machining with magnetic force.

Grinder commonly used at present applies required grinding normal pressure to workpiece, except using spiral, mechanical means such as spring also have hydraulic pressure and mode such as pneumatic outward, and to pettyly be with abrasive disk pressurization up and down, wanting petty is to concentrate pressurization by the axle of planetary gear, though structure is simple or pressure is adjusted easily, but geometric accuracy to lathe, kinematic accuracy and rigidity requirement are very high, cost and maintenance cost are increased, on the other hand, for polished many workpiece of while, because the deviation and the grinder flatness of workpiece original depth, the depth of parallelism or rotation end are jumped the existence of sum of errors malformation, make each workpiece pressure inequality, the pressure of the different parts of big workpiece is also inhomogeneous, and a plurality of workpiece at first grind the wherein high point of minority of minority workpiece when grinding, and increase contact area gradually, thick workpiece is ground into already and perhaps thin workpiece does not also grind, total amount of grinding is much larger than required minimum amount of grinding, and also presumable simultaneously workpiece is ground partially, causes the low and percent defective height of productivity ratio.

The objective of the invention is provides a kind of cost low, the grinder that productivity ratio and yield rate are high in order to overcome the above-mentioned shortcoming of existing grinder.The structure of magnetic force even pressure type star lapping machine as shown in Figure 1, Fig. 2 is the magnetic fixture fundamental diagram, further specifies below:

Magnetic force even pressure type star lapping machine, by abrasive disk (1), central gear (2), planetary gear (3), retainer (4), driving shaft (5) and frame formations such as (9), the axle of planetary gear (6) is fixed on the retainer and in revolution thereupon, produce rotation with the central gear engagement of not changeing, it is characterized in that: be distributed in the magnetic fixture (7) of can only axial float and can not rotate is housed in the axial hole on the planetary gear, because of planetary gear and clamp body are non-magnet_conductible materials, make the high-intensity magnetic field of the permanent magnet (8) that is set in the anchor clamps be penetrated sheet-like workpiece and inhale together on the abrasive disk surface, the normal pressure of grinding is provided, and the revolution of planetary gear and rotation drive workpiece is done complicated track along the abrasive disk surface plane motion.

Below magnetic fixture is described further:

Size according to workpiece, but a plurality of workpiece of pressure zone on each planetary gear, and each workpiece all by separately independently magnetic fixture overlay on abrasive disk, so, no matter the original depth deviation of workpiece is much, can both under identical normal pressure, synchronously be ground, can not take place to make other workpiece be forced to the drawback that excess is ground in order to grind the thinnest workpiece, also reduced requirement on the other hand to the grinder accuracy of manufacture and rigidity, as long as it is smooth to grind card, the structure of grinder is also simpler.

Magnetic fixture can be according to the workpiece size, shape and required normal pressure design, for bigger workpiece, in clamp body, a plurality of permanent magnets but pack in axially parallel ground, magnetic pole points to identical, because of clamp body is a non-magnet_conductible material, thereby the magnetic field of these a plurality of magnets passes the anchor clamps end face mutually intentinonally, uniform force application workpiece is overlayed on the abrasive disk surface, can avoid workpiece to grind partially like this, owing between magnetic fixture and its pilot hole suitable gap is arranged, for the workpiece of initial depth of parallelism difference, magnetic fixture still can make the work surface of workpiece paste in large area and lie prostrate in the evenly grinding of abrasive disk surface in addition, avoided grinding thicker position for correcting the parallelism error excess, on the contrary, if reduce the gap of anchor clamps and pilot hole, then can correct the parallelism error of workpiece to a certain extent.

This grinder according to requirements such as processing and uses, can be that abrasive disk and central gear are fixed and the retainer rotation, also can be that retainer is fixed and abrasive disk and central gear rotation.

Claims

1 magnetic force even pressure type star lapping machine is by abrasive disk (1), central gear (2), planetary gear (3), retainer (4), driving shaft (5) and frame formations such as (9), the mandrel of planetary gear (6) is fixed on the retainer and in revolution thereupon, produce rotation with the central gear engagement of not changeing, it is characterized in that: be distributed in the magnetic fixture (7) of can only axial float and can not rotate is housed in the axial hole on the planetary gear, because of planetary gear and clamp body are non-magnet_conductible materials, make the high-intensity magnetic field of the permanent magnet (8) that is set in the anchor clamps be penetrated sheet-like workpiece and inhale together on the abrasive disk surface, the normal pressure of grinding is provided, and the revolution of planetary gear and rotation drive workpiece is done complicated track along the abrasive disk surface plane motion.

The magnetic force even pressure type star lapping machine of 2 claim 1 defineds, according to the workpiece size, but a plurality of workpiece of pressure zone on each planetary gear is characterized in that: each workpiece all by separately independently magnetic fixture overlay on abrasive disk.

The magnetic force even pressure type star lapping machine of 3 claims 1,2 defineds, it is characterized in that: magnetic fixture can design according to workpiece size, shape and required normal pressure, for bigger workpiece, in clamp body, a plurality of permanent magnets but pack in axially parallel ground, magnetic pole points to identical, because of clamp body is a non-magnet_conductible material, thereby the magnetic field of these a plurality of magnets passes the anchor clamps end face mutually intentinonally, uniform force application workpiece is overlayed on the abrasive disk surface.

The magnetic force even pressure type star lapping machine of 4 claim 1 defineds is characterized in that it can being that abrasive disk and central gear are fixed and the retainer rotation, also can be that retainer is fixed and abrasive disk and central gear rotation.