US2167311A - Method of abrading crankshafts - Google Patents

Method of abrading crankshafts Download PDF

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Publication number
US2167311A
US2167311A US164390A US16439037A US2167311A US 2167311 A US2167311 A US 2167311A US 164390 A US164390 A US 164390A US 16439037 A US16439037 A US 16439037A US 2167311 A US2167311 A US 2167311A
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Prior art keywords
abrading
bearing
liners
engine
crankshaft
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Expired - Lifetime
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US164390A
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Postma Frank
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Postma Frank
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36Single-purpose machines or devices
    • B24B5/42Single-purpose machines or devices for grinding crankshafts or crankpins
    • B24B5/425Single-purpose machines or devices for grinding crankshafts or crankpins in situ
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49229Prime mover or fluid pump making
    • Y10T29/49286Crankshaft making

Description

July 25, 1939.
F. POSTMA METHOD OF ABRADiNG CRANKSHAFTS,
Filed Sept. 17, 1937 gnaw 141cm Z72: Pasfmw WQ/M/MW v Patented July 2s, 1939 ,z,1e1,a11"
METHOD or masonic onanxsnms roman, Bidsewood, N. .i. mama September 11, 1931, Serial no. 164,390
2 Claims. (Cl. sh-@218) This invention relates to a method of abrading 1 crankshafts, and has more particular reference to an improved method of abrading the journals of engine crankshafts for the purpose of ,truing and/or polishing such journals after they have become unevenly worn and scored from any cause such as continued operation of the engine with defective or.burned out bearing liners.
In truing and polishing the journals of engine 10 crankshafts, as heretofore practiced, it hasbeen necessary to completely remove the-crankshaft from t e engine and subject the crankshaft iour-.
nals ,to the action of grinding or lapping and/or polishing, tools forming part ofv a; separate anddistinct lapping and polishingmachine. While efi'icient, such prior methods were extremely slow andcostly;
My method provides for abrading the journals of an engine'crankshaft without removing the same from the engine andwhile operatively associated with the main bearings of the engine block and with the connecting rod bearings of the engine. I accomplish this by substituting thinabrading liners of the type shown in my co-pending U. S. application Ser. No. 164 filed September 17, 1937, now lgatent No. ,1 ated Dec. 27, 1938, for the bearing liners of the main and connectingjiod bearings of the engine, and rotating the engine crankshaft so as to subject the journals ofthe latter-tn the action of said abrading liners for truing and/or polishing said journals In this way, I am able to accomplish eflicient and accurate truing and polishing. of the crankshaftjournals under the actual conditions of engine operation and in an expeditious and economical manner. As is the case with ordinary bearing liners, the abrading liners consist of a pair of semi-cylindrical members adapted to seat against the bore of thebearing and having secured or bonded to their inner surfaces ,suitable granular abrading. material, such as emery or carborundum, which engages the crankshaft journal. The abrading liner sections are preferably of the same width or lengthas the 5 bearing block and its cap? and are seated in con- 'tacting relation with each other at their end or longitudinal edges. -As withbearing liners, the; abrading liners are preferably provided with means to assure retention of the same in the 50- correct positions with-respect to each other and the bearing and against turning with the crankshaft journal, such as cooperating elements of the abrading liners and the bearings. The abrade ing liner sections are preferably constructed'of 55 relatively. stiff and strong material, such as steel or other suitable metal, which will efiectively resist distortion and destruction during the abrading operation.
Other objects and features of the invention will become apparent from the following descfip- 5 tion when considered in connection with the accompanying drawing, in which:
, Figure 1 is a fragmentary sectional view showing an engine whose crankshaft bearings are provided with abrading liners for abrading the 10 crankshaftjournals in accordance with the present method.
Figure 2 is an enlarged fragmentary section taken on line 2-2 of Figural at one side of a connecting rod bearing; and l5 Figure 3 is an. enlarged perspective view of one of the abrading liner sections employed in carrying out the present method as shown in Figures Referring in detail to the drawing, 5 indicates 20 an engine cylinder block having pistons 6 reciprocable' in the cylinders thereof. As usual, the engine crankshaft I has a plurality :of spaced journals lmounted in bearings 9 ofthe engine block 5, and the cranksof said crankshaft have 25 journals l0 engaged in bearings 9w provided on the lower ends of connecting rods ll, to the upper ends of which the pistons 6 are attached. As is well known in the art, each of the bearings 9 and 9:: includes a half hearing or hearing block 30 integral with thecylinder block- 5 and the connecting rod H as respectively indicated at l2 .and lid, and a separate, half bearing Onbearing cap l3 and "a, detachably bolted as at l4; and
a tothe-bearing block I! andila, respectively. 5 i
As is also well known in the art, the bearings 9 and aa are usually provided with thin bearing liners which are seated loosely in the bearings and clamped therein by the bolts. or Illa by n which the several sections of the bearings are 40 clamped together. Each of these bearing liners usually consists oi! a pair of semi-cylindrical members composed of a thin outer shell adapted to s'eatsagainst the bore of thebearing and having bonded to its inner surface suitable anti-friction material which engages the crankshaft journal. The bearing liner sectionsare usualls the same width or length as the bearing and are seated vin contacting relation with each other at their' end or lqngitu a1 edges. In accorda oe with the present invention, the
bearing line s of the bearings 9 and 9a are re-.
' moved and abrading liners ccnforining in general size and shape to said bearing liners are substituted for. the latter,such abru'ding liners each consisting of a pair of semi-cylindrical members 15 composed of a thin outer shell adapted to seat against the bore ofthe bearing and having secured or bonded to its inner surface granular abrading material l6 such as emery or carborundum which bears upon the crankshaftjournal. These abrading liner sections are the same width or length as the bearing and are seated in contacting relation with each other at their end or longitudinal edges. Some suitable means such as is usually provided in connection with the bearing liners, is provided to assure retention of the abrading liner sections in the correct positions with respect to each other and the bearing. In
the construction illustrated by way of example,
this means consists of a lug I! struck outwardly from an end of each abrading liner section and adapted to engage in a recess l8 of the associated bearing member and to abut the adjacent end of the coacting bearing member as shown clearly in Figure 2. In this way the abrading liner sections are also held against turning with the crankshaft the journals of the, crankshaft to the abradingaction of the .abrading liners. As the abrading operation proceeds, the abrading liners may be' adjusted by means of suitable shim plates interposed between the bearing and the abrading liners, or thickerabrading liners may be substituted for those initially placed in the bearings, if found necessary. In the initial steps of the method, comparatively coarse abracling elements orliners are employed, and after the crankshaft rotate the crankshaft for a sufllcient length of time after the abrading liners are placed in the bearings. Upon completing the polishing operation, the abrading liners are removed and the bearings are ready for reception of new bearing liners. All of these operations are performed without removing the crankshaft from the engine and without the necessity of, a separate and distinct lapping and polishing means of expensive, construction. By truing and polishing the crankshaft journals in the engine block and connecting rod bearings, accurate and efficient truing of the bearings is insured in a most expeditious and economical manner. The abrading linersmay be individually manufactured in proper sizes and grades, or'they may be formed at the point of operation by cutting suitable blanks from sheet abrading material especially manufactured for the purpose.
From the foregoing description, it is believed that the nature of the present invention, as well as its advantages, will be readily understood and appreciated by those skilled in the art.
What I claim as new is:
- 1. The method of abrading the main journal of an engine crankshaft without removing the latter from the engine, which consists in substituting in the actual main engine bearing and for the bearing liner sections of said bearing, thin abrading liner sections composed of thin outer shells of stiff strong sheet material having abrading material bonded to their inner surfaces and correspending in formand size to said bearing liner sections, securing said abrading liner sections in the hearing by the means which secures the bearing sections together so that the abrading material thereof contacts the surface of the crankshaft journal, and rotating the crankshaft while in the engine so as to subject its journal to the action of said abrading liner sections. I
2. The method of abrading the journal of an engine crankshaft, which consists in substituting in the actual crank pin bearing of the actual engin'e connecting rods-and for the bearing liner sections of said bearing without removing said connecting rod or its piston from the engine, thin abrading liner sections composed of thin outer shells of stiff strong sheet material having abrading material bonded to their inner surfaces and corresponding in form and size to said hearing liner sections, securing said abrading liner sections in the hearing by the meanswhich secures the bearing sections together so that their abrading material contacts the surface of the crankshaft journal, and rotating the crankshaft so as to subject its journal to the action of said abrading liner sections.
FRANK POSTMA.
US164390A 1937-09-17 1937-09-17 Method of abrading crankshafts Expired - Lifetime US2167311A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505197A (en) * 1943-12-24 1950-04-25 Borg Warner Pump housing
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2638719A (en) * 1948-08-26 1953-05-19 Landis Tool Co Crank grinding machine
US3168799A (en) * 1963-04-23 1965-02-09 Sanders R Johnson Tool for polishing pipe fittings and the like
WO2010028733A1 (en) * 2008-09-10 2010-03-18 Man Diesel, Filial Af Man Diesel Se, Tyskland Device and method for machining a bearing seat or a bearing journal supported therein
US20110195017A1 (en) * 2008-09-05 2011-08-11 Servicios Administrativos Penoles S.A. De C.V. Process for the production of high purity magnesium hydroxide
CN103317400A (en) * 2013-06-28 2013-09-25 侯马市东鑫机械铸造有限公司 Automatic grinding and polishing machine for engine crankshafts
US9233447B2 (en) * 2014-05-12 2016-01-12 Robert Alan Shortridge, SR. Stave hone assembly for use with rotating shafts

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2505197A (en) * 1943-12-24 1950-04-25 Borg Warner Pump housing
US2519588A (en) * 1943-12-24 1950-08-22 Borg Warner Pump housing
US2638719A (en) * 1948-08-26 1953-05-19 Landis Tool Co Crank grinding machine
US3168799A (en) * 1963-04-23 1965-02-09 Sanders R Johnson Tool for polishing pipe fittings and the like
US20110195017A1 (en) * 2008-09-05 2011-08-11 Servicios Administrativos Penoles S.A. De C.V. Process for the production of high purity magnesium hydroxide
CN102149513A (en) * 2008-09-10 2011-08-10 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 Device and method for machining a bearing seat or a bearing journal supported therein
WO2010028733A1 (en) * 2008-09-10 2010-03-18 Man Diesel, Filial Af Man Diesel Se, Tyskland Device and method for machining a bearing seat or a bearing journal supported therein
JP2012501857A (en) * 2008-09-10 2012-01-26 エムエーエヌ・ディーゼル・アンド・ターボ・フィリアル・アフ・エムエーエヌ・ディーゼル・アンド・ターボ・エスイー・ティスクランド Apparatus and method for machining a bearing seat or bearing journal supported therein
CN102149513B (en) * 2008-09-10 2013-10-16 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 Device and method for machining a bearing seat or a bearing journal supported therein
US8979612B2 (en) 2008-09-10 2015-03-17 MAN Diesel & Turbo, Filial of MAN Diesel & Turbo SE, Tyskland Apparatus and method for machining a bearing seat or a bearing journal supported therein
CN103317400A (en) * 2013-06-28 2013-09-25 侯马市东鑫机械铸造有限公司 Automatic grinding and polishing machine for engine crankshafts
CN103317400B (en) * 2013-06-28 2015-07-15 侯马市东鑫机械铸造有限公司 Automatic grinding and polishing machine for engine crankshafts
US9233447B2 (en) * 2014-05-12 2016-01-12 Robert Alan Shortridge, SR. Stave hone assembly for use with rotating shafts

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