US2340385A - Lapping tool - Google Patents
Lapping tool Download PDFInfo
- Publication number
- US2340385A US2340385A US454994A US45499442A US2340385A US 2340385 A US2340385 A US 2340385A US 454994 A US454994 A US 454994A US 45499442 A US45499442 A US 45499442A US 2340385 A US2340385 A US 2340385A
- Authority
- US
- United States
- Prior art keywords
- lap
- lapping tool
- mercury
- lead
- molded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 7
- 229910052753 mercury Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000006061 abrasive grain Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005555 metalworking Methods 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
- B24B37/12—Lapping plates for working plane surfaces
- B24B37/14—Lapping plates for working plane surfaces characterised by the composition or properties of the plate materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S451/00—Abrading
- Y10S451/905—Metal lap
Definitions
- This invention relates to lapping tools and the like, and more particularly to "finishing laps for finishing and polishing hard metal objects such as metal-working rolls and the like.
- lead and mercury compositions or alloys possess the aforesaid characteristics to a high degree, and that a lap molded therefrom affords a speedy and efficient tool in practice. In experimenting with said composition, I have found that the mercury content.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Patented Feb. 1, 1944 LAPPING TOOL Foster F.
American Steel Hiliix, Lakewood. Ohio, more The and Wire Company of New 1 Jersey, a corporation of New Jersey No Drawing.s
ZClaims.
This invention relates to lapping tools and the like, and more particularly to "finishing laps for finishing and polishing hard metal objects such as metal-working rolls and the like.
It is a prime object of my invention to provide such a tool having the characteristics of being friable while having sumcient strength to prevent a body or block thereof from breaking up in service, and being further characterized by the capacity to erode away evenly and at a sumcient rate to properly distribute and apply an abrasive grain over the surface of the work bein l p I have discovered that lead and mercury compositions or alloys possess the aforesaid characteristics to a high degree, and that a lap molded therefrom affords a speedy and efficient tool in practice. In experimenting with said composition, I have found that the mercury content.
thereof should preferably not be less than about 28% by weight, and that the action of a lap formed therefrom is still further enhanced by increasing the mercury content up to about from 35% to 87% by weight, the balance thereof being lead.
However, in excess of 87% of mercury with Q the lead produces a crumbly composition which will not remain in molded form in use, and therefore isunsuitable for a lapping tool.
An excellent composition and lap thereof which has proved highly satisfactory upon hardened steel metal-working rolls embodies about 35% mercury and 65% lead, by weight. A block or lapping tool molded therefrom is sumciently friable to provide a working face which has the desired porosity and erosion capacity to properiy accommodate and apply an obvious grain for producing line highly polished finishes.
Application August 15, 1942, erial No. 454,994
In actual test, such a lap produced a finish upon a 10-inch x 10-inch roll in approximate y thirty minutes. After use, the face of the lap showed no concentrated loading of the grain, and the surface of the roll was ,free of stray scratches or digs, the latter being the ruination of many an otherwise well lapped finish. The finish so produced upon the roll surface was highly polished with a desired uniformity.
The lap of my invention is simple and relatively inexpensivein comparison with laps employing more complicated alloys or compositions, and has the further attribute of being readily and selectively varied within the ran e specified 5 to produce compositions most suitable to a speciflc abrasive grain size or fineness.
Various changes and modifications contemplated within the scope of the following claims.
Iclaim:
l. A finishing lap consisting of about 28% to 37% mercury by weight and the balance thereof of lead. molded into block form, characterized by being friable and having the capacity to erode away evenly, while having sufficient strength to remain in molded form and to thereby apply a cutting pressure to abrasive grain.
2. A finishing lap consisting of about mercury and lead by weight, molded into so block form, characterized by being friable and
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US454994A US2340385A (en) | 1942-08-15 | 1942-08-15 | Lapping tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US454994A US2340385A (en) | 1942-08-15 | 1942-08-15 | Lapping tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2340385A true US2340385A (en) | 1944-02-01 |
Family
ID=23806927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US454994A Expired - Lifetime US2340385A (en) | 1942-08-15 | 1942-08-15 | Lapping tool |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2340385A (en) |
-
1942
- 1942-08-15 US US454994A patent/US2340385A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3996702A (en) | Coated abrasive product comprising fused zirconia grains and method for abrading iron | |
| Malkin | Current trends in CBN grinding technology | |
| US3808747A (en) | Mechanical finishing and media therefor | |
| US1625463A (en) | Diamond lap | |
| US2340385A (en) | Lapping tool | |
| US2737454A (en) | Diamond grinding wheel | |
| US2548582A (en) | Abrasive suspensions | |
| US3476537A (en) | Abrasive composition with limestone as the porosity-inducing agent | |
| US2340384A (en) | Lapping tool | |
| US2340383A (en) | Lapping tool | |
| US2318580A (en) | Method and material for polishing metal articles | |
| US2955030A (en) | Polishing compositions | |
| US2318581A (en) | Materials for use in tumbling barrel polishing and finishing and method of producing same | |
| US2340380A (en) | Lapping tool | |
| US2319331A (en) | Abrasive article | |
| US2921419A (en) | Grinding and polishing of glass sheets | |
| US1931370A (en) | Grinding, polishing, lapping, and finishing of metals | |
| US2340386A (en) | Lapping tool | |
| JPS5819716B2 (en) | Kakohouhou | |
| US2306175A (en) | Finish-grinding and polishing stones | |
| US2655775A (en) | Lapping method and tool | |
| JP3040441B2 (en) | Precision polishing method for ceramics | |
| US2177316A (en) | Grinding | |
| US1914647A (en) | Method for finish grinding and polishing | |
| USRE21789E (en) | Abrasive tool |