DE1957286A1 - Polishing machine - Google Patents

Description

Our reference: S 2537

SPBBDPAM CORPORATION

509 North Third Avenue

Des Piaines, Illinois 60016 / V.St.A.

Polishing machine

The invention relates generally to a polishing machine having a rotatable polishing pad assembly and Means for bringing the workpieces to be polished into contact with the upper surface of the polishing pad assembly to press.

One embodiment of a buffing machine has a horizontally rotatable base plate that extends across the top surface the same length polishing cloth, a loading plate unit, can accommodate the workpieces on their lower plane and over the counter disc in such a way can be arranged so that the workpieces contact the polishing cloth, and means on which a vertical spindle arrangement to center the loading plate assembly and apply pressure to it "usually becomes a variety of workpieces to be polished

St.

009831/0941

-2-

BATH ORIGINAL

for example with paraffin on the lower surface of the Load plate assembly attached. In this way the workpieces become in position relative to the loading plate assembly and can move with it during the polishing process.

In the above embodiment, the derivation of the ^ in the loading plate unit is during the polishing process gangs generated heat is not completely satisfactorily solved in all applications, and the attachment of the Workpieces on the loading plate unit and removing them from it has not been so on various occasions expediently as it would be desired.

According to the present invention is the Belastungsplat- 'teneinheit provided with an upwardly directed Hlttelöffriung and with channels which communicate with the opening, in order to allow circulation of a coolant in the interior of the unit .. At the same time, the spindle arrangement having Strömungssittelübertragungseinri .. - ■ - 'provided to conduct coolant separately to the opening and the coolant, which has absorbed heat, to dissipate from the opening. This cools the load plate assembly to compensate for heat developed in it during the polishing process *

In addition, the loading plate unit from, the SpIndela & ortomg detachable, and at a point remote from the polishing machine there is a fluid with an opposing temperature ours.! i the load ^ - » disk unit hiaduro will be routed * ^ m. di «ae optional to heat od®2 "asu cool to a. Soften

00Ö831 / 0I41

"'■' ■ 'ÖÄD ORIGINAL

Solidify the fastener, as required, while the workpieces attached to or removed from the loading plate assembly. This is how the fastening is done of the workpieces on the loading plate unit and releasing the same from it largely facilitated.

The invention is described below with reference to the drawing. Show in it?

Pig. 1 is a partially sectioned view of a polishing machine incorporating the features of the present invention j

Pig. 2 shows a horizontal section essentially along the line 2-2 in Pig. 1 y

Pig ο 3 an enlarged vertical center section through the loading plate unit and the spindle assembly according to the invention and others therewith connected machine parts}

Pig. 4 shows a horizontal section essentially along the line 4-4 in Pigο 3J

Pig ο 5 a reduced horizontal section essentially along line 5-5 in Pig »3»

Pig. 6 is a shortened front view of a workpiece fastening device; with parts broken off and parts shown in section |

009831/0941

ORKälNAL INSPECTED

7 shows a reduced side view of the device according to Figo 6 and

FIG. 8 is a reduced horizontal view taken generally along line 8-8 in FIG.

In Figo 1, a polishing machine 10 is shown, the Has features of the present invention. The polishing machine 10 has a frame with a substantially cylindrical housing 12, which is supported by a foundation ring 14 is worn. On opposite sides of the housing 12 are the lower ends of vertical pillars 16 attached accordingly. A horizontal bridge part 18 extends between the upper ends of the pillars 16, which is provided with opposing pairs of side arms 20. At the outer end of each of the four arms 20 A vertical air piston and cylinder assembly is attached which includes a cylinder 24 », a stabilizing sleeve 26 and a piston rod 28.

A cylindrical ring 30 is attached to the upper end of the housing 12 by means of an annular inclined wall 32. In addition, a main drive motor 34 is mounted in the housing 12 and is connected to a conventional speed reduction unit 36 carried in the ring 30. The output shaft of the speed sreduziereinheit 36 is connected in a known Weis "with a substantially horizontal Poliersoheibenanordnung 38, as shown in FIGS. 2 and 3, and serves to cause the rotation thereof.

009831/0941

The polishing pad assembly 38 is made up of an annular Counter bills 40 and from one out about theirs upper surface extending polishing cloth 42. The counter disk 40 is preferably made of metal, for example Brass, which has high thermal conductivity. The polishing cloth 42, for example canvas or a synthetic, non-woven cloth, is secured by means of a ring or tire 44 in its held position, which is clamped in a corresponding manner around the outer periphery of the counter disk 40 around is. Instead of the cloth, a mushroom material can either be clamped or glued to the counter-disk 40 will. The polishing pad assembly 38 is surrounded by an annular, thin-walled jacket or guard 46, which is normally held in the position shown in Figs. 1 and 2, the loading and unloading of the To enable polishing machine, and it can be lifted into the position according to Pig ο 3 during the polishing process.

A free flowing polishing slurry can add to the polishing pad assembly 38 fed through tubes or grommets 48 which extend downward from the bridge part 18, as shown in FIG. The sole lamb will the spouts 48 fed through lines 50, which are connected to a sump-pump unit.52, which in the lower Part of the housing 12 arranged lsi. The polishing slab flowing off the polishing pad surface 38 is collected by the inclined wall 32, which acts as a drip pan serves, and directed to a drain. The polishing slurry can for example consist of a polishing mixture, like, for example, one with a basic stock

00 831/0 * 41

Part of iron oxide, cerium oxide or zirconium oxide, which is used in Water is finely divided or mixed with it.

In the lower end of each of the piston rods 28 is a vertical one Fixed spindle assembly 54, which includes a spindle 56. Each spindle 56 is provided with a first axial channel 58 and provided with a second axial channel 60. The first axial channel 58 is open at its lower end and communicates at its upper end with a radial inlet 62 which communicates with a source from below Pressurized fluid can be connected. The second axial channel 60 is through at its lower end a plug 64 closed, opens through a radial bore 66 between its ends from the spindle 56 out near the outside and stands at its upper end with a radial outlet 68 in communication which can be connected to a fluid tank or drain. The first Axial channel 58 and inlet 62 form a first channel arrangement, the second axial channel 60 and the radial bore 66 and outlet 68 form a second channel arrangement, and said first and second channel arrangements together form a fluid transfer device with a dual that is described below will.

With each of the spindles 56 is a substantially horizontal ring-shaped Druoksoaale 70 connected between the baths, which has on its lower middle} » Slagriff middle in the form of an annular band? 2. Between the spindle 56 and the pressure regulator TO is a floating or swivel connection in the form of a TTniver-

008031/0841

BATH

Ball bearing assembly 74 is provided. The bearing assembly 74 is supported by a snap ring 76 that attaches to the spindle 56 is placed and held in place by a spring ring 78 which is inserted into the pressure shell 70. Direct above the pressure collar 70 is on the spindle 56 an input assembly 80 is attached, which serves to protect the bearing assembly 74 against the polishing mixture and against foreign bodies to protect.

With each pressure shell 70 has a substantially horizontal circular loading plate unit 82 is connected, which, as shown in Fig. 3, 4 and 5, consists of upper and lower plate portions 84 and 86 which are fixed to each other by means of several screws 88th The upper plate section 84 is provided with a central opening 90, with multiple Eadialkanälen 92, which together with the lower plate portion 86 of a first radial opening arrangement, _for forming a second radial opening arrangement with a plurality of inclined radial holes 94, and equipped with an annular recess 96, which, together with an annular recess in the lower plate section Θ6, forms an annular chamber. The channels 92 and the openings 94 and the recess together form a channel arrangement in the loading plate unit 82. An annular separating plate 98 is arranged in the recess 96 in order to subdivide this recess into upper and lower regions which are connected at their outer circumferential regions. In the separating plate 98 a plurality of upwardly projecting down or NaOH warts 100 are provided, which serve to center the plate in the recess 96th

009831/0941

-8th-

In the center opening 90 of the loading plate assembly are a pair vertically spaced from one another Seal assemblies 102 attached. Each seal assembly 102 consists of an outer body portion 104 and a flexible inner lip portion 106 which is urged radially inward by an annular spring 108. The lower end portion of the spindle 56 can be received in the central opening 90 of the load plate assembly 82 will. In this cooperative situation stands the first axial channel 58 in the spindle 56 with the lower part of the central opening 90 and the radial channels 92 in Connection, while the radial bore 66 in the spindle 56 with the central opening 90 and with the radial openings 94 is in communication between the seal assemblies 102. The ring springs 108 are used to make the flexible Lip portion 106 of the seal assemblies 102 with the adjacent periphery of the spindle 56, and the seal assemblies 102 and their associated Annular springs 108 serve as rotary pressure seals. The top surface of the top plate portion 84 is provided with engagement means in the form of an annular recess 110 which the annular edge 72 of the Pressure shell 70 can accommodate workpieces 112 while on the lower surface of the lower plate section 86 can be attached.

In Figs. 6 and 7 is a workpiece fastening device 120, which are arranged on a workbench at a location remote from the polishing machine 10 can be. The workpiece fastening device 120 has a substantially horizontal housing 122

0 0 9831/0941.

and a rectangular frame 124 supported thereby. On the lower leg of the frame 124 is a circular support plate assembly 126 with a central upstanding Uasenabschnitt 128 attached. The plate assembly 126 is provided with a first channel assembly 130, one end of which is at the top End of the Uasenabschnitts 128 opens and at its other end with an inlet opening 132 in connection that can be connected to a source of pressurized fluid. The plate arrangement 126 is also provided with a second channel arrangement 134, one end of which is attached to the side of the Nose section 128 opens and at its other end communicates with an outlet port 136 connected to a fluid tank or drain can be. The rabbit portion 128 has essentially the same dimension as the lower end portions of the spindle 56 and can be inserted into the central opening 90 of the load plate unit 82 * On the upper leg of the frame 124 is a vertical * © air piston and rzylinaeranordnung 138 attached, the one Cylinder 140 and a piston rod 142 includes the lower end of which is a pressure plate 144 attached.

In preparation for polishing, a loading plate unit 82 is placed on the support plate assembly 126 of the tool attachment device 120, as shown in FIGS. 6 and 7. A hot flow of water, such as water or steam, is then passed through the inlet opening 132, the first channel arrangement 1? 0 _for the channel arrangement de? Loading plate unit 82, the

831/0141

BATHROOM ORIGIMATE

Channel arrangement 134 and passed through the outlet opening 136. Thereafter, a thin layer of paraffin or other suitable fastening material having a melting point below the temperature of the fluid passed through the loading plate assembly is applied evenly to the exposed surface of the loading plate assembly. Workpieces 112 are then inserted into the softened, liquefied paraffin, with the sides of the workpieces to be polished facing upwards (Pig. 8). In order to achieve a uniform paraffin coating between the workpieces 112 and the loading plate unit 82, the piston rod 142 can be extended to move the pressure plate 144 from the position shown in solid lines in FIGS. 6 and 7 to the position shown in unbroken lines in Pig. 6 to press the gauze position down to exert a bridge on the workpieces 112. While the pressure is applied to the workpieces 112, the circulation of hot fluid through the Iragplattenanordnung 126 and the Belastungsp ^"1 atteneinheit 82 is interrupted, and cold water one, cooling means, such, as the assembly 126 and the unit is duroh. 82 in order to solidify the paraffin and fix the workpieces 112 to the unit 82. Finally, the pressure plate 144 is withdrawn upwards, the circulation of the cooling medium is interrupted and the loading plate unit with the workpieces attached to it is removed from the B * -. ftitigungBTorriärtung 120 * bgeno »m * yes and xur au der Polieraaechin · 10 ua reversed,.

At the polierataiohint 10 the # hits 82 ait dsn an ihatn b «f» atigt »n works

0ÖJ831 / 0941 .tt-

BAPORiGWAL

moved onto the pad assembly 38 "and below the corresponding pressure shells 70 arranged. The air piston and cylinder assemblies 22 are "actuated" about piston rods 28 and spindle assemblies 54 downward extend until the edges 72 of the pressure shells 70 under the desired pressure into the recesses 110 of the Load plate assemblies 82 engage. Simultaneously The lower end portions of the spindles 56 are received in the central openings 90 of the loading plate assemblies 82.

The polishing pad assembly 38 is then rotated and polishing material is supplied from the nozzles 48 to the surface of the pad. In addition, a coolant, such as. B. cold water _? introduced under pressure into the inlet 62 of the spindle and conveyed through the first axial channel 58 to the lower part of the central opening 90 in the loading plate assembly 82. From the central opening 90, the coolant passes through the radial channels 92, around the partition plate 98 in the recess 96, through the radial openings 94 and is returned to the central opening 90 between the sealing assemblies 102. From this point the fluid is conveyed through the hadial bore 66 and the second axial channel 60 and discharged at the radial outlet 68 of the spindle. In this way, the coolant absorbs heat by conduction from the loading plate unit 82, and the loading plate unit is thereby cooled to dissipate the heat developed in it during the polishing process. While the workpieces are being polished, the spindles 56 and the pressure shells 70 serve to

009831/0941

center support plate assemblies 82 and the bearing assemblies 74 and dial assemblies 102 allow free rotation and floating or pivoting of the loading plate units 82.

After completion of the polishing process, the drive of the polishing wheel assembly 38 and the supply of polishing material to her interrupted the introduction of pressurized fluid into inlet 62 of the Spindle is interrupted and the spindle assemblies are withdrawn and the pressure cups 70 disengaged brought with the loading plate units 82. Then the loading plate units 82 and workpieces attached to them removed from the polishing wheel assembly, vice versa and back to the workpiece fastening device 120 transferred. Then hot fluid is passed through the loading plate assembly 82 to soften the paraffin, whereupon the work pieces are loosened and easily removed can be.

The diameter of each loading plate assembly 82 can be be substantially the same, smaller or larger than the radial width of the annular surface of the washer. It it will also be understood that in the drawing some elements, such as the cloth 42 and the workpieces 112, shown on a different scale for the sake of clarity are.

009831/0941. ,,

Claims (4)

Claim ii it ( 1 .JPolishing machine with a frame, a polishing pad assembly which is attached to the frame on a vertical axis, means for rotating the polishing pad assembly, at least one vertical spindle attachment carried by the frame above the polishing pad assembly, a substantially horizontal circular loading plate unit, on the lower Surface workpieces for contact with the polishing pad assembly, and means for selectively establishing engagement between the spindle assembly and the loading plate unit, characterized in that the loading plate unit has a central opening, that the loading plate unit has a channel arrangement which is in communication with the opening, in order to enable a fluid circulation inside the unit for cooling the same, and in that the spindle arrangement has a fluid transfer device in order to conduct fluid separately to the opening en and to receive from it. 2. Polishing machine according to claim 1, characterized in that the channel arrangement consists of an annular chamber, a first radial opening arrangement between the central opening and the annular chamber for conducting of fluid to this chamber and from a second radial port arrangement between the Annular chamber and the central opening for receiving There is fluid from this chamber. 009831/0941 BATH ORIGINAL -H- 3. Polishing machine according to claim. 2 _f characterized in that means are provided for dividing the chamber into upper and lower regions which are in communication with one another at their outer _{circumferences f} that the first radial opening arrangement extends between the central opening and the inner circumference of the lower chamber bej'eiohes and that the second radial opening arrangement extends between the inner periphery of the upper chamber region and the central opening. 4. Polishing machine according to claim 2, characterized in that the spindle arrangement has a lower portion which protrudes into the central opening, that the Strcaitagömxttelüberteagungseinrlühung has a first channel arrangement in the Spindelanördnung which can be connected to a source of brackish fluid and with the central opening of the stent in the first radial Eähe Öffnuiigsanordnimg in connection, and that the Strömungsmittellibertragungseinrichtung having a second channel arrangement in the Spindelanördnung j dis communicates with the Mittelöffnuiig in the SFäliö zweitan the radial opening arrangement in Terbindung Imae can wsrfei connected to a Strcmungsmitteltank. 5 * Pölie :: iL £; aoMne according to claim 4j thereby göj £ enn net, isJ the engaging means from a biMmag are fixed and provided in an axial directional arrangement la άνννν opening between the lower part of the spindle arrangement and the second radial loading plate arrangement on the opposite sides of the radial loading plate unit solitary. Q ο 9 8 3 1/0 9 4 1 . BATH ORIGINAL.