US1773177A - Lap - Google Patents

Lap Download PDF

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Publication number
US1773177A
US1773177A US184566A US18456627A US1773177A US 1773177 A US1773177 A US 1773177A US 184566 A US184566 A US 184566A US 18456627 A US18456627 A US 18456627A US 1773177 A US1773177 A US 1773177A
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United States
Prior art keywords
lap
abrasive
wearing
slot
flange
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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
Application number
US184566A
Inventor
Groetchen Richard
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Individual
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Individual
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Publication date
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Priority to US184566A priority Critical patent/US1773177A/en
Application granted granted Critical
Publication of US1773177A publication Critical patent/US1773177A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/04—Rigid drums for carrying flexible material
    • 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

  • YIt has for one object to provide a lap, the major portion of which is permanent and in which the part subjected to abrasion and wear is removable. Another object is to provide a lap which. will automatically accommodate itself in lapping to holes of a relatively wide variation in size. Another Objectis to provide a process whereby a constantly moving and shifting layer of abrasive is vbrought up to carry out the lapping operation. Other objects will appear from timeto time in the course of the specification' and claims.
  • Figure 1 is a vertical cross-section of a piece during the lapping operation showing the lap and associated Aparts in elevation.
  • FIG. 1 is a perspective view of the permanent portion of the lapping device with the wearing part removed.
  • ⁇ r Figure 3 is a perspective of the wearing part of the lap.
  • Figure 4 is a transverse cross-section taken on line 4 4: of Figure 1 and on an enlarged scale.
  • Figure 5 is a view similar to Figure 4 in which the wearing part has been reversed in relation to the permanent part of the lap.
  • Figure 6 is a view similar to Figure 3, showing a modified formk of the wearing member.
  • A is a piece in which a perforation A1 has beenformed.
  • VB is any suitable rotating device in which the lap C is removably positioned.
  • the lap consists of a main shank portion C which' may have a reduced upper end C1 and which normally has formed about it anv outwardlyextending flange or ring C2.
  • a slot G3 is provided in its outer or lower end with a slot G3, and preferably at the inner end of the slot it has an enlargement C4. It is also provided with a. plurality of circumferential slots C5 evenly spaced therealong.
  • Dy is a wearing member or part -formed in a generally cylindrical shape, provided with an inwardly bent flange or edge D1, which is circular with the axis of the member D.
  • the member D is preferably so proportioned that when it is positioned upon the outer or lower end kof the lap C wit-lithc'tongue or flange D1 lying within the slot C3, its free edge will not meet the point X at which the flange D1 is. inwardly turned and there is thus left' a nar' row slot or groove'like portion X1.
  • the member D is provided with ⁇ a plurality oi' apertures- D5 arranged in rows and positioned to overlie the circumferential grooves C5 ofthe member C.
  • the location of said grooves and apertures inrelation to the members C and D is such that the member D is reversible and that it is impossible to put it on the member C and thrust it against the flange@2 without causing the apertures D5 to overlie the grooves C5.
  • an abrasive or preferably a lubricant is applied to it, being inserted into the slot and this works down into the space X1 and forms a vertical strip of abrasive material extending 'throughout the length of the member D..
  • a Wearing element is used inl which theabrasive material yforms a partof the wearing element and thus in effect, the wearing element is ⁇ impregnated with abrasive and forms in itself an abrasive element. This element maybe used with or without additional abrasive.
  • FIG. V6 l illustrate the memi ⁇ ber D as imperforate, sinceunder certain preventing relative rotation of the sleeve and mandrel, said sleeve embracing the mandrel cireumferentially with the opposite ends of the split sleeve terminating in spaced relation, one of said ends being free to permit relative movement thereof with reference to the mandrel.

Description

Aug. 19, 1930. R. GRoETcHEN LAP Original Filed April 18. 1927 Patented Aug. 19, 1930 PATENT orner;`
RICHARD erRoEfroHEN,4 or CHICAGO, iLLINoIs LAP Applicationl led April 18, 1927, Serial No. 184,566. Renewed November 14, 1929.
-This invention relates to a smoothing, lapping or polishing process and .to an apparatus for carrying out lsuch process. YIt has for one object to provide a lap, the major portion of which is permanent and in which the part subjected to abrasion and wear is removable. Another object is to provide a lap which. will automatically accommodate itself in lapping to holes of a relatively wide variation in size. Another Objectis to provide a process whereby a constantly moving and shifting layer of abrasive is vbrought up to carry out the lapping operation. Other objects will appear from timeto time in the course of the specification' and claims.
The invention is illustrated more or less diagrammatically in the accompanying drawings, whereinf o Figure 1 is a vertical cross-section of a piece during the lapping operation showing the lap and associated Aparts in elevation.
l Figure 2 is a perspective view of the permanent portion of the lapping device with the wearing part removed. I
`rFigure 3 is a perspective of the wearing part of the lap.
Figure 4 is a transverse cross-section taken on line 4 4: of Figure 1 and on an enlarged scale. f
Figure 5 is a view similar to Figure 4 in which the wearing part has been reversed in relation to the permanent part of the lap.
Figure 6 is a view similar to Figure 3, showing a modified formk of the wearing member.
Like parts are indicated by like characters y throughout the specification and drawings. A is a piece in which a perforation A1 has beenformed.
VB is any suitable rotating device in which the lap C is removably positioned.
LThe lap consists of a main shank portion C which' may have a reduced upper end C1 and which normally has formed about it anv outwardlyextending flange or ring C2., It
is provided in its outer or lower end with a slot G3, and preferably at the inner end of the slot it has an enlargement C4. It is also provided with a. plurality of circumferential slots C5 evenly spaced therealong.
Dy is a wearing member or part -formed in a generally cylindrical shape, provided with an inwardly bent flange or edge D1, which is circular with the axis of the member D. The member D is preferably so proportioned that when it is positioned upon the outer or lower end kof the lap C wit-lithc'tongue or flange D1 lying within the slot C3, its free edge will not meet the point X at which the flange D1 is. inwardly turned and there is thus left' a nar' row slot or groove'like portion X1. The member D is provided with `a plurality oi' apertures- D5 arranged in rows and positioned to overlie the circumferential grooves C5 ofthe member C. The location of said grooves and apertures inrelation to the members C and D is such that the member D is reversible and that it is impossible to put it on the member C and thrust it against the flange@2 without causing the apertures D5 to overlie the grooves C5. 4lhen the tool is in use, an abrasive or preferably a lubricant is applied to it, being inserted into the slot and this works down into the space X1 and forms a vertical strip of abrasive material extending 'throughout the length of the member D.. It also passesabout the grooves C5 andthrough the :apertures D, thus insuring a const-ant and uniform Ydistribution of the abrasive or lubricant throughout the surface of the member D. In the modiiied vform shown in Figure 6, a Wearing element is used inl which theabrasive material yforms a partof the wearing element and thus in effect, the wearing element is` impregnated with abrasive and forms in itself an abrasive element. This element maybe used with or without additional abrasive.
Referring to Figure V6 l illustrate the memi `ber D as imperforate, sinceunder certain preventing relative rotation of the sleeve and mandrel, said sleeve embracing the mandrel cireumferentially with the opposite ends of the split sleeve terminating in spaced relation, one of said ends being free to permit relative movement thereof with reference to the mandrel.
Signed at Chicago, county of Cook, and State of Illinois, this 15th day of April, 1927.
RICHARD GROETCHEN.
US184566A 1927-04-18 1927-04-18 Lap Expired - Lifetime US1773177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US184566A US1773177A (en) 1927-04-18 1927-04-18 Lap

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Application Number Priority Date Filing Date Title
US184566A US1773177A (en) 1927-04-18 1927-04-18 Lap

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US1773177A true US1773177A (en) 1930-08-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620960A1 (en) * 1987-09-30 1989-03-31 Sunnen Products Co EXPANDABLE HONING OR STONING TOOL
ES2070086A2 (en) * 1993-04-22 1995-05-16 Sunnen Products Co Modular expandable honing tool
US20050272360A1 (en) * 2004-06-08 2005-12-08 Mariusz Tyranowski Sander attachment for a drill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620960A1 (en) * 1987-09-30 1989-03-31 Sunnen Products Co EXPANDABLE HONING OR STONING TOOL
US5022196A (en) * 1987-09-30 1991-06-11 Sunnen Products Company Expandable honing tool
ES2070086A2 (en) * 1993-04-22 1995-05-16 Sunnen Products Co Modular expandable honing tool
US20050272360A1 (en) * 2004-06-08 2005-12-08 Mariusz Tyranowski Sander attachment for a drill

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