US3897658A - Method and apparatus for finishing workpieces under high vibrating pressure (tentative) - Google Patents

Method and apparatus for finishing workpieces under high vibrating pressure (tentative) Download PDF

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Publication number
US3897658A
US3897658A US351966A US35196673A US3897658A US 3897658 A US3897658 A US 3897658A US 351966 A US351966 A US 351966A US 35196673 A US35196673 A US 35196673A US 3897658 A US3897658 A US 3897658A
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United States
Prior art keywords
tub
mass
dam
finishing
workpieces
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Expired - Lifetime
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US351966A
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English (en)
Inventor
Hisamine Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shikishima Tipton Manufacturing Co Ltd
Tipton Manufacturing Corp
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Tipton Manufacturing Corp
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Priority to US05/469,888 priority Critical patent/US3935680A/en
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Publication of US3897658A publication Critical patent/US3897658A/en
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    • 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
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B24B31/073—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers involving a bowl being ring- or spiral-shaped

Definitions

  • the apparatus has a circular vibratory finishing tub having an opening at the top which is closed in operation, and has the radially greatest sectional area at a central portion thereof before a dam and the radially smallest sectional area at that portion thereof beyond said dam.
  • the tub is a downwardly inclined or horizontal circular vibratory finishing tub in the form of a hollow annulus having an opening at the top which in operation is closed, having the radially greatest sectional area other than the mass separating portion, at that portion thereof before a dam and a sec tional area which is gradually smaller toward both ends thereof.
  • one end having the smallest sectional area at that portion beyond or downstream of the dam and the other end having a medium sectional area at that portion connected to the mass separating portion, so that contents of the mass are caused to move in a closely spaced relation and are thus subjected to a heavy force by the vibration while moving inside the tub.
  • the invention provides an improved finishing efficiency by increasing the smoothness of the finished surfaces, and also a reduction of substantially half the amount of deviation of the milled grain sizes from the desired sizes, in addition to an increased volume of workpieces which can be finished.
  • it provides a completely novel performance by bringing the whole efficiency to substantially four times that of the prior art.
  • This invention is characterized in that the circular vibratory finishing tub having an opening at the top to be closed in operation comprises two portions with radially different sectional areas, so that the mass is caused to move inside the tub under a heavy compression force by the vibration.
  • FIG. 1 is a front view of one apparatus according to this invention.
  • FIG. 2 is a plan view of the apparatus of FIG. 1.
  • FIG. 3 is a fragmental developed sectional view taken along the line A A of FIG. 2.
  • FIG. 4 is a front view of another apparatus according to this invention.
  • FIG. 5 is a plan view of the apparatus of FIG. 4.
  • FIG. 6 is a sectional view taken along the line B B of FIG. 1.
  • FIG. 7 is a front view of one conventional apparatus.
  • FIG. 8 is a front view of another conventional apparatus.
  • a dam is provided to separate a circular vibrating finishing tub into two portions, one having the radially greatest sectional area and the other having the radially smallest sectional area. so that the mass moving inside the tub can be finished or milled by vibration under a heavy compression force with a substantially improved efficiency.
  • FIGS. 1 and 2 the upper end I of a circular vibratory finishing tub placed in a downwardly inclined position as shown in FIGS. 1 and 2.
  • the tub has a descending part 1a. an ascending part lb. and a separating part It, respectively.
  • FIGS. 4 and 5 as shown a circular vibratory finishing tub 21, 21a placed in a substantially horizontal position. which has an ascending part 2112 and a separating part 21c.
  • the circular vibratory finishing tub is rigidly secured by a rib 3 to a flange 2 and mounted by a plurality of springs 5 on a pedestal 4.
  • An electric motor 9 is vertically fixed to a flange 8 within a cylindrical housing 7.
  • a dam I2 is rigidly secured on said superposed portion II.
  • a dam is also provided for the horizontal tub of FIGS. 4 and 8.
  • This dam is preferably of an angular shape having an ascending part 12 and a descending part 12a.
  • a dam having only one plate may be provided vertically. or only that portion of the angular-shape dam facing the flow direction of the mass may be provided with an ascending part.
  • the ratio of the sectional area at one point to that at the other point inside the tub should be maintained within the range of a given value.
  • a cover 6 encloses a plurality of helical springs S.
  • a movable flap I3 is placed in such a position that it does not prevent movement of the mass. indicating a position which the flap I3 takes in turning on its shaft 14 when the mass is being separated.
  • a sieve 15 is provided for separating the mass.
  • a mass charging port 16 is provided with a cover 16a having a grip 1617. In operation. the port I6 is closed by the cover 16a. This port 16 is provided as indicated in FIG. 1 near to that portion of the tub where the mass is entering the finishing portion after passing through the separating portion.
  • the flap 13 rotates on its shaft to the position as indicated by dot-dash lines 131: of FIGS. I and 3 to move the mass up to the sieve I5 where the mass is separated into workpieces and abrasive media.
  • the media are screened through the sieve to be fed again into the tub.
  • the finished workpieces are automatically ejected out of the tub as indicated by the arrow 20.
  • the invention is particularly characterized in that the circular vibratory finishing tub comprises one portion before the dam having the radially greatest sectional area and one portion over the dam having the radially smallest sectional area. so that the mass is caused to move under a heavy compression force during vibration.
  • a circular vibratory finishing tub is provided in the form of a hollow tubular container having a gradually smaller sectional area toward both ends. having one portion before the dam having the radially greatest sectional area, one portion over the dam having the radially smallest sectional area. and one portion connecting to the separating portion having a radially medium sectional area. so that the vibration given to the whole exerts on the mass a substantially compressing force. The mass is thus caused to move under such heavy compressing force during vibration.
  • the widths E'. F. G of the tub at the various portions except the separating portion are the same as indicated in FIG. 2.
  • the portion F of the tub before the dam hits the greatest in depth. and the depth of portion F after the separating portion should be smaller than E and greater than 0.8 E. the optimum being more or less 0.9 E.
  • the depth of portion G over the dam should preferably be (1.9 E G 0.5 the optimum being within the range of 0.8 E to (1.6 E, namely E F G and accordingly EE' FF' GG'.
  • the vibrating width or amplitude is compressed so as to be substantially smaller than 6 mm and greater than 3 mm.
  • the amplitude generally ranges from 8 mm to 3 mm but in this invention, it is possible to obtain an amplitude of6 mm to 2 mm by compressing it by l mm to 3 mm. In this way, workpieces can be polished or finished under heavy compression force during vibration.
  • the vibration thus obtained differs greatly from that of the prior art in the finishing efficicncy, since the former offers substantially four times higher performance than the latter.
  • the finishing efficicncy of the invention differs greatly from that of the conventional apparatus. which is due to the fact that the inner diameter D of the outer periphery of the tub and the outer diameter d of the inner periphery thereof have a common size, respectively, in all types,
  • E, F'and G have the same width, while these portions have radially different sectional areas depending on the depth E, F and G thereof.
  • the portions F and G should be E F 0.8 and E and 0.9 E G 0.5 E, respectively, resulting in E F G.
  • the structure and function are not such as to compress the moving mass during either the finishing or separating operations. Because of this, higher inner walls must be provided for the inner and outer peripheries of the tub so as to prevent the overflow of the mass moving onto the stationary and movable dams during the separating operations. This causes the mass to flow backward, resulting in a considerably decreased separating efficiency and more frequent damage or defects due to the impact thereof.
  • Table 4 also shows the remarkably significant difference in the milling efficiency between the prior art apparatus of FIG. 7 and that of FIGS. 1-3 of the present invention.
  • the upper part M of the mass M forces the mass M to remain on the down stream side (side G of FIG. 4) of the plate H, keeping the mass filling the space between the portions E and G until the upper part M moves down to a level N on the upstream side (side F of FIG. 3) of the plate H. thus enabling the mass to be separated into workpieces and abrasive media effectively. At this stage. workpieces alone are ejected out of the tub.
  • the volume H of the mass that remains on the up stream and down stream sides of the plate H after completion of the separating operation will be equivalent to M/2, from which it is evident that the maximum separating volume MB of the conventional apparatus has been improved by substantially fifty percent.
  • the size. shape and position of installation of the plate H should be such that it is placed nearer to the portion E along the distance between the portions E and G and on the radially inside inner peripheral wall of the tub, having a width of about K/4 and a height of about K (K is width of the tub), the lower end portion 15 being inclined at an angle (more or less 60 )ohtained by intersecting a line passing through the center 0 of a circle K and a perpendicular line U as shown in FIG. 6.
  • the plate H should also be such that the major por- Table l tion of the inside areuate bottom of the tub is not shut off but open. so as to force the mass up to the downstream side of the plate H thus preventing the mass from flowing back from the downstream side to the up- 5 stream side.
  • a separating device is provided at the top of the upper portion of the tub indicated by of FlGS. l and 3.
  • the distance between the sieve and the bottom of the tub is smaller than the width of the tub, which is equivalent to substantially half the distance between the separating device (indicated by 15 of FIGS. 7 and 8) and the bottom of the tub in the conventional apparatus. This makes it possible to avoid occurrence of damage to or defects in the workpieces due to the impact thereof. also providing a good finishing efficiency for aluminum bronze. zinc diecast and other soft metals.
  • F and G in the direction of the radius of the arcuate hottom of the tub is almost the same as 2-H) mm.
  • the vertical section in the direction of the radius of the tub is 2.
  • Type (3) of this invention is superior in almost proportional to the depth E. F and G of the space inside the tub. except the separating portion.
  • Type (2) is a conventional finishing apparatus having a horizontal circular vibratory finishing tub. open at the top. Model CL lOU. as shown in FIG. 8.
  • Type 4) is a finishing apparatus of the invention having a horizontal circular vibratory finishing tub, Model C RS- 100, as shown in FIGS. 4 and 5.
  • Table 4 said tub for closing and charging opening, said finishing portion having an equal width throughout its circum- Experimental Results fcrential length and having a depth at said charging Milling Emciency opening and above said dam less than the depth adja- TW: 3; cent the bottom of said dam, and the depth of said finishing portion increasing gradually from said charging opening to the bottom of said dam and from the top to Grain 5 to a) 47% z to no, 67% the ot m f i m Disiwrsivn s g 1% lungellhun 12% 2.
  • An apparatus for vibrating finishing of workpieces dam are in the relationship E F G. under heavy compression force during vibration, com- 3.
  • mass sepa 7 An apparatus according to claim 1 in which the rating means in said means separating portion of said stationary dam has an ascending portion facing uptuh adjacent to and above the level of the top of said stream and a descending portion facing downstream.
  • said tub having a charging opening in 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Crushing And Grinding (AREA)
US351966A 1972-04-17 1973-04-17 Method and apparatus for finishing workpieces under high vibrating pressure (tentative) Expired - Lifetime US3897658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/469,888 US3935680A (en) 1972-04-17 1974-05-14 Method for vibratory finishing workpieces under heavily compressed condition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3847472A JPS5414795B2 (enrdf_load_stackoverflow) 1972-04-17 1972-04-17

Related Child Applications (1)

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US05/469,888 Division US3935680A (en) 1972-04-17 1974-05-14 Method for vibratory finishing workpieces under heavily compressed condition

Publications (1)

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US3897658A true US3897658A (en) 1975-08-05

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US351966A Expired - Lifetime US3897658A (en) 1972-04-17 1973-04-17 Method and apparatus for finishing workpieces under high vibrating pressure (tentative)

Country Status (6)

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US (1) US3897658A (enrdf_load_stackoverflow)
JP (1) JPS5414795B2 (enrdf_load_stackoverflow)
CH (1) CH579966A5 (enrdf_load_stackoverflow)
DE (1) DE2319146C3 (enrdf_load_stackoverflow)
FR (1) FR2199675A5 (enrdf_load_stackoverflow)
GB (1) GB1401386A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001979A (en) * 1975-09-08 1977-01-11 The Hutson Corporation Unloading ramp assembly
US4253916A (en) * 1979-09-19 1981-03-03 Shikishima Tipton Mfg. Co., Ltd. Vibratory plating method
US5873770A (en) * 1996-07-22 1999-02-23 The Timken Company Vibratory finishing process
EP0965805A3 (en) * 1998-06-17 2000-05-03 Chuo Kakohki Co., LTD. Vertical type vibration dryer
US20120264357A1 (en) * 2009-04-09 2012-10-18 Sang-Bae Shim Game ball surface treatment apparatus
IT201900007052A1 (it) * 2019-05-21 2020-11-21 Paolo Redaelli Metodo per vibrosabbiatura perfezionato e macchina relativa

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646156B1 (enrdf_load_stackoverflow) * 1971-07-28 1981-10-31
JPS5191725A (en) * 1973-11-26 1976-08-11 fukushaki no bunrisochi
DE2425094C3 (de) * 1974-05-24 1984-07-05 Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal Federnd abgestützter Ringtrog- Vibrations-Scheuerbehälter
JPS5422000B2 (enrdf_load_stackoverflow) * 1974-07-11 1979-08-03

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248826A (en) * 1963-04-22 1966-05-03 Wheelabrator Corp Method for the finishing of parts
US3618267A (en) * 1969-05-02 1971-11-09 Ernst Huber Tumbling machine with automatic discharge
US3802129A (en) * 1972-01-03 1974-04-09 A Ferrara Universal finisher and separator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213568A (en) * 1961-07-18 1965-10-26 Wheelabrator Corp Corrugated bowl lining for vibrators
GB1026718A (en) * 1964-04-06 1966-04-20 Podmore And Sons Ltd Improvements relating to grinding operations

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3248826A (en) * 1963-04-22 1966-05-03 Wheelabrator Corp Method for the finishing of parts
US3618267A (en) * 1969-05-02 1971-11-09 Ernst Huber Tumbling machine with automatic discharge
US3802129A (en) * 1972-01-03 1974-04-09 A Ferrara Universal finisher and separator

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001979A (en) * 1975-09-08 1977-01-11 The Hutson Corporation Unloading ramp assembly
US4253916A (en) * 1979-09-19 1981-03-03 Shikishima Tipton Mfg. Co., Ltd. Vibratory plating method
US5873770A (en) * 1996-07-22 1999-02-23 The Timken Company Vibratory finishing process
EP0965805A3 (en) * 1998-06-17 2000-05-03 Chuo Kakohki Co., LTD. Vertical type vibration dryer
US20120264357A1 (en) * 2009-04-09 2012-10-18 Sang-Bae Shim Game ball surface treatment apparatus
US8550882B2 (en) * 2009-04-09 2013-10-08 Sang-Bae Shim Game ball surface treatment apparatus
IT201900007052A1 (it) * 2019-05-21 2020-11-21 Paolo Redaelli Metodo per vibrosabbiatura perfezionato e macchina relativa
WO2020233846A1 (en) * 2019-05-21 2020-11-26 Paolo Redaelli Improved vibroblasting method and relative machine

Also Published As

Publication number Publication date
CH579966A5 (enrdf_load_stackoverflow) 1976-09-30
DE2319146C3 (de) 1981-07-30
JPS49897A (enrdf_load_stackoverflow) 1974-01-07
JPS5414795B2 (enrdf_load_stackoverflow) 1979-06-09
DE2319146A1 (de) 1973-10-25
DE2319146B2 (de) 1977-07-14
FR2199675A5 (enrdf_load_stackoverflow) 1974-04-12
GB1401386A (en) 1975-07-16

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