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Publication numberUS2900703 A
Publication typeGrant
Publication dateAug 25, 1959
Filing dateMay 25, 1954
Priority dateMay 25, 1954
Publication numberUS 2900703 A, US 2900703A, US-A-2900703, US2900703 A, US2900703A
InventorsThomas C Kane
Original AssigneeCommercial Shearing
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Descaling apparatus
US 2900703 A
Abstract  available in
Images(4)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 25, 1959 T. c. KANE 2,900,703

' DESCALING APPARATUS Filed May 25, 1954 4 Sheets-Sheet 1 INVENTOR Thomas C Kane Aug. 25, 1959 T. c. KANE DESCALING APPARATUS 4 Sheets-Sheet 2 Filed May 25. 1954 INVENTOR v Thomas 0 Kane Au 25, 1959 T. c. KANE 2,900,703

DESCALING APPARATUS Filed May 25. 1954 4 Sheets-Sheet 5 INVENTOR Thomas C. Kane Aug. 25, 1959 T. c. KANE DESCALING APPARATUS 4 Sheets-Sheet 4 Filed May 25. 1954 mw d DESCALHJG APPARATUS Thomas C. Kane, Mahoning, Ohio, assignor to The Cornmercial Shearing and Stamping Co., Youngstown, Ohio, a corporation of @hio Application May 25, 1954, Serial No. 432,270

Claims. (Cl. 29-81) This invention relates to descaling apparatus and particularly to a portable unitized descaling apparatus. The descaling of metal parts with high pressure water is a common industrial practice. The piece to be descaled is heated to a high temperature and subjected to a spray of high pressure water or similar descaling liquid. At the present time, descaling operations are carried out by using high pressure water derived from expensive multistage centrifugal pumps or reciprocating plunger pumps. These pumps are large and expensive. Moreover, the valving required on such apparatus is expensive and difficult to maintain. As a result, there has been no suitable apparatus available for use in small establishments.

I provide a descaling apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, means operable by pressure from the piece to be descaled admitting hydraulic fluid from the supply means to the piston opposite the descaling liquid to discharge the descaling liquid from the cylinder and simultaneously move the pusher means and piece to be descaled axially away from the cylinder and means receiving the descaling liquid and discharging it against the moving piece to be descaled.

Preferably I provide a descaler apparatus having a cylinder, a piston movable in the cylinder and means for delivering the descaling liquid to one side of the piston to move the piston in the cylinder. Means are provided for continuously supplying hydraulic fluid under pressure. Pusher means are movable axially in the piston extending out of the cylinder. Resilient means are provided in the piston to bear against the pusher means normally biasing the pusher means toward the end of the piston in contact with the descaling liquid. The pusher means is adapted to receive the end of a piece to be descaled in point contact. A control arm on the piston opposite the pusher means extends out of the cylinder. Valve means controlled by the pusher means are provided to admit hydraulic fluid to the cylinder from the supply means when the pusher means is forced against the resilient limiting means by the combined pressure of the descaling liquid and the piece to be descaled. The means receiving the descaling liquid and discharging it against the piece to be descaled is preferably an annular spray nozzle discharging a thin continuous sheet of spray.

Preferably the descaling liquid is water supplied to the cylinder from a city water line through a check valve. The means for continuously supplying hydraulic fluid under pressure is preferably a gear pump supplying oil under pressure which continuously circulates into and out of a reservoir. Valve means are provided operable by the control arm on the piston to by-pass the oil into the cylinder against the side of the piston opposite the descaling liquid so as to force the descaling liquid out of the cylinder into the discharge means.

In the above description I have enumerated certain of 2,900,703 Patented Aug. 25, 1 959 the important features and advantages of my invention, however, other objects, features and advantages will become apparent from a consideration of the following description and the accompanying drawings, in which Figure 1 is a side elevation of a preferred embodiment of my descaling apparatus;

Figure 2 is a top plan view of the apparatus of Fig ure 1;

Figure 3 is a vertical section through the cylinder and piston of the descaling apparatus of Figure 1;

Figure 4 is a side elevation of another embodiment of'a descaling apparatus according to my invention;

Figure 5 is a partial section of the pressure cylinder used in the embodiment shown in Figure 4; and

Figure 6 is a diagrammatic showing of the descaler of Figure 4.

Referring to the drawings, I have illustrated in Figures 1 to 3 a preferred embodiment of the descaling apparatus according to my invention. Referring to Figure l, I have shown a framework 10 carrying a gear pump 11 in an oil reservoir 12. The gear pump 11 is driven by an electric motor 13 mounted on the base of the frame it). Mounted on the frame 10 above the motor is a cylinder 14 provided with a piston 15 movable axially therein. Descaling liquid is furnished to the cylinder on one side of the piston through an inlet 16 connected to a city Water line 16a through a check valve not shown. A discharge outlet .l7 is provided at the same end of the cylinder for the discharge of liquid into a descaling spray nozzle. A pusher rod 18 is provided in piston 15. The pusher rod carries at one end a head 19 provided with knife edge contacts 20 against which the piece to be descaled is brought to hear. The pusher rod 18- passes through the body of the piston 15 in an axially extending bore 21. The opposite end of the pusher rod is provided with a collar 22 which bears against a spring 23 to hold the collar on the pusher rod biased away from the piston. The end of the cylinder opposite the descaling liquid is provided with an inlet 24 connected to the hydraulic feed lines 25 by a valve 26. The valve 26 is an air operated diaphragm valve of the poppet type, having a solenoid operated air valve of the Quik-as-a-Wink type 26a controlling the air entering the valve from air line 26b. The solenoid is operated by a holding switch controlled by limit switch 2'7. The limit switch 27 is operated by the end of the pusher rod assembly 18 when the piston is in the retracted position and the pusher rod spring 23 is compressed by a piece to be descaled. When the valve 2 6 closes the flow of oil is diverted into cylinder 14 through the inlet 24 the piston 15 moves axially in the cylinder and forces the water in the opposite end of the cylinder out through the outlet line 17 into a descaling spray head 31. At the same time the check valve in the city water line 16a is held in the closed position. The end of the piston 15 extending out of the cylinder at the end opposite the pusher rod head acts as a control arm and is provided with a collar 28 which moves between parallel support bars 29 on opposite sides of the piston. These support bars support the limit switches and carry a stop member 28a limiting the stroke of the piston when the piston is retracted. At the end of the discharge stroke the collar 28 operates a limit switch 30 to cut off the solenoid 26a and thereby release the air from the valve 26 to permit the return of the hydraulic fluid from the cylinder 14 into the reservoir 12 all the while permitting continuous circulation of oil from the reservoir through the gear pump 11, the line 25, the valve 26 and back to the reservoir. While the hydraulic fluid is moving the piston 15 against the descaling liquid the pusher rod assembly is carried along with the piston and forces the piece to be descaled back through the spray of descaling liquid causing the liquid to spray overthe piece being descaled from one end to the other. A cylindrical shell 30 is mounted on the frame 10 around the end of the cylinder 14 and the pusher head 19 on the descaling endofpusher rod 18 and extends axially 'outwardly therefrom. A descaler spray head '31 is mounted adjacent the extremity of the shell. The descaler head 31 may be of conventional design or it may be of the type illustrated and described in my copending application Serial No. 471,679, filed November 29, 1954, now Patent No. 2,785,924. A supporting roller 30a is rotatably mounted in the shell to support the piece to be descaled.

The operation 'of the descaler is as follows. The cylinder 14 is normally retracted to the left viewing Figure 1 with the cylinder full of descaling liquid. A piece to bedescaled is inserted into the shell 30 against the pusher rod head 19. The rod is pushed inwardly against the pressure of spring 23' until its opposite end engages the switch 27 whereupon valve 26 is closed and oil is forced into the cylinder behind the piston, moving the piston towards the right viewing Figure 1, closing the check valve in the water supply line 17, and forcing the water into the spray head 31 from which it is discharged against the surfaces of the heated piece to be descaled. The discharge water falls into a trap 32 at the bottom of the shell 30 and is discharged to a drain through pipe 33. While the piston 15 is forcing the water out of the cylinder 14 it is also carrying both the pusher rod assembly and the piece to be descaled to the right (viewing Figure 1) at a regular rate of speed through the spray of water discharged from the spray head 31 and out of the shell 30 into a collecting bin 34. As the piston approaches the right end of the cylinder viewing Figure 1 the collar 28 engages the limit switch 29 operating the air valve 26a and releasing the diaphragm valve 26 thereby releasing the pressure on the oil within the cylinder which is forced back into the oil reservoir 12 by the influx of water into the cylinder 14 through the check valve in the city water line.

The quantity of water for descaling may be varied by varying the size of the cylinder. The rate of discharge per square inch of area to be descaled is constant for any given cylinder thus assuring a regular rate of cooling and descaling and avoiding overcooling or'failure t descale.

Referring to the embodiment illustrated in Figures 4 through 6 I have shown a frame 40 having mounted thereon a gear pump41 operated by an electric motor 42. The pump receives oil from a reservoir 43 mounted on the frame and is connected through a relief valve 43a and double-acting spool valve 44 to discharge'to the reservoir. A cylinder 45 carrying a piston 46 therein is connected to the double-acting spool valve and is movable in two directions by means of the oil pressure generated at the hydraulic pump. The piston 46 is provided with a pair of water outlets 47 and 48 at opposite ends thereof connecting to a city water supply line 49 through a pair of check valves 50 and at the same time is connected through high pressure check valves to a delivery line 51 leading to the descaling spray head 52. A second cylinder 53-is mounted on the frame 40 and carries a piston 54 similar to piston 15 of 'Figure 1 which extends out of the cylinder at one end thereof. One side of the second cylinder is connected to an oil and air reservoir 55 designed to maintain one side of the cylinder full of oil. The other side of the cylinder is connected to a solenoid operated air valve-56 of'the Quilt-as-a-Wink type. The spool valve 44 is operated by an air cylinder and piston 58 through air valves 59'and 60 of the conventional Quik-as-a-Wink type, which control the direction of air flow into the air piston 58 and thereby the direction of flow through the double-acting spool valve 44.

The operation of this embodiment of my invention is generally as follows. The piece, i.e. billet, to be descaled, is inserted through the descaling nozzles 52 and against the pusher rod 54 in the cylinder 53. This operates the timed starting switch 61 energizing the solenoids on the air valves 56 and 59 or 60, as the case may be, to move air cylinder 58 and the spool valve 44. Hydraulic fluid then flows from the gear pump 41 through the spool valve into one side or the other of the cylinder 45 causing the piston therein to move and to force the water in the cylinder out through discharge lines 48 or 47, as the case may be. The water in the cylinder 45 which is forced through one of the outlets 47 or 48 into the water discharge line, closes the proper check valves on the city water supply line and opens the valves on the discharge line. Water is then'discharged through the descaling head against the billet being descaled. At the same time air is admitted through valve 56 into the pusher cylinder 53 forcing the billet through the descaling water spray. The rate of progress of the billet through the spray is regulated by a needle valve 53a in the line between the cylinder 53 and the reservoir 55. When the switch opens at the end of its timed period the air cushion in reseivoir 55 forces oil back into cylinder 53 to return piston 54 to its original position.

While I have illustrated and described certain present preferred embodiments of my invention it will be understood that it may be otherwise embodied within the scope of the following claims.

I claim;

1. A descaler apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, means operable by pressure from the piece to be descaled admitting hydraulic fluid from the supply means to the piston opposite the descaling liquid whereby to discharge the descaling liquid from the cylinder and simultaneously move the pusher means and piece to be descaled axially away from the cylinder and means receiving the descaling liquid and discharging it against the moving piece to be descaled.

2. A descaler apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston means continuously supplying hydraulic fluid under pressure, pusher means on the piston on the end receiving the descaling liquid, said pusher means extending out of the cylinder and adapted to receive the end of a piece to be descaled in point contact, resilient means normally biasing the pusher means out of the piston end receiving the descaling liquid, a control member on the end of the piston opposite the descaling liquid, valve means admitting hydraulic fluid to the cylinder from the supply means when the control member on the pusher means is forced against the resilient limiting means by the pressure of the piece to be descaled and releasing the hydraulic fiuid from the cylinder when the control arm on the piston approaches the end of the cylinder, and means receiving the descaling liquid and discharging it against the piece to be descaled.

3. A descaler apparatus comprising a cylinder, a piston movable in said cylinder, means for irreversibly delivering descaling liquid at low pressure to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, said pusher means being reciprocable in a bore in the piston, resilient biasing means in the piston normally biasing the pusher means out of the piston end receiving the descaling liquid, stop means limiting the movement of the pusher means in the bore, a control member on the end of the piston opposite the descaling liquid, valve means admitting hydraulic fluid to the cylinder from the supply means when the pusher means is forced against the resilient limiting means by the pressure of the piece to be descaled and releasing the hydraulic fluid from the cylinder when the control member on the piston approachesthe-cylinder and means receiving the descaling liquid and discharging it against the piece to be descaled.

4. A descaler apparatus comprising a cylinder, a piston movable in said cylinder and extending out of one end thereof, means for irreversibly delivering descaling liquid at low pressure to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means in the piston extending out of the cylinder at both ends then adapted to receive the end of a piece to be descaled, said pusher means extending through the piston and movable in a hollow bore therein, resilient biasing means in the piston normally biasing the pusher means out of the piston end receiving the descaling liquid, stop means limiting the movement of the pusher means in the bore, a control member on the end of the piston extending out of the cylinder, valve means admitting hydraulic fluid to the cylinder from the supply means when the pusher means is forced against the resilient limiting means by the pressure of the piece to be descaled and releasing the hydraulic fluid from the cylinder when the control member on the piston approaches the cylinder and means receiving the descaling liquid and discharging it against the piece to be descaled.

5. A descaling apparatus comprising a cylinder, a piston reciprocable in said cylinder and extending out of one end thereof, means for irreversibly delivering descaling liquid at low pressure to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means in the piston extending axially out of the cylinder at both ends thereof and adapted to receive the end of a piece to be descaled in point contact, said pusher means extending through the piston and movable in a hollow bore therein, resilient biasing means in the piston normally biasing the pusher means out of the piston end receiving the descaling liquid stop means limiting the movement of the pusher means in the bore, a control member on the end of the piston extending radially from the portion of the piston extending out of the cylinder, a limit switch lying in the path of travel of the pusher means and adapted to be energized by movement of the pusher means against the biasing means when the cylinder is full of descaling liquid, a second limit switch lying in the path of travel of the control member and adapted to be energized by the control member when it reaches a point adjacent the end of the cylinder, valve means reversibly controlled by said first and second limit switches admitting hydraulic fluid to the cylinder from the supply means when the first limit switch is energized and releasing the hydraulic fluid from the cylinder when the second limit switch is energized and means receiving the descaling liquid and discharging it against a piece to be descaled.

6. A descaling apparatus comprising a frame, acylinder mounted horizontally in said frame, a piston reciprocable in said cylinder and extending out of one end thereof, a pair of support members on the frame parallel to each other and to the cylinder and on opposite sides thereof, means for irreversibly delivering liquid at low pressure to one side of the piston, means adapted continuously to supply hydraulic fluid under pressure, pusher means in the piston extending axially out of the cylinder at both ends thereof and adapted to receive the end of a piece to be descaled in point contact, said pusher means extending through the piston and movable in a hollow bore therein, resilient biasing means in the piston normally biasing the pusher means out of the piston end re-- ceiving the descaling liquid, stop means limiting the movement of the pusher means in the bore, a control member on the end of the piston extending radially from the portion of the piston extending radially from the portion of the piston extending out of the cylinder, said control member being slidable between the support members, stop means on the support members limiting the piston in its extended position out of the cylinder, valve means on the frame admitting hydraulic fluid to the cylinder from the supply means when the pusher means is forced against the resilient limiting means by the pressure of the piece to be descaled and releasing the hydraulic fluid from the cylinder when the control member on the piston appreaches the cylinder and means receiving the descaling liquid and discharging it against the piece to be descaled.

7. A descaling apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston, means continuously supplying hydraulic fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, resilient means normally biasing the pusher means toward the piece to be descaled, valve means introducing hydraulic pressure from the supply means onto the piston when the pusher means is forced against the resilient means by the pressure of a piece to be descaled and simultaneously moving the pusher means axially of its length and releasing the hydraulic pressure from the piston when the piston approaches the end of the cylinder, and means receiving the descaling liquid and discharging it against the piece to be descaled.

8. A descaler apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston, at least one means adapted continuously to supply fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, means operable by pressure from the piece to be descaled simultaneously admitting pressure fluid from at least one supply means to the pusher means and piston opposite the descaling liquid whereby to discharge the descaling liquid from the cylinder and simultaneously move the pusher means and piece to be descaled and means receiving the descaling liquid and discharging it against the moving piece to be descaled.

9. A descaling apparatus comprising a cylinder, a piston movable in said cylinder, means for delivering descaling liquid to one side of the piston, at least one means continuously supplying fluid under pressure, pusher means adapted to receive the end of a piece to be descaled, resilient means normally biasing the pusher means toward the piece to be descaled, valve means simultaneously introducing fluid pressure from at least one supply means to the pusher means and piston when the pusher means is forced against resilient means by the pressure of a piece to be descaled whereby the pusher means is moved axially of its length simultaneously with the discharge of descaling liquid from the cylinder and means receiving the descaling liquid to discharge it against the piece to be descaled.

10. In a descaling apparatus, a cylinder, a piston in said cylinder movable in either direction, a hollow piston rod attached to said piston, pusher means loosely attached to said hollow piston rod and adapted to receive the end of the workpiece, resilient means normally biasing the pusher means toward the workpiece, valve means operable by the pusher means when the pusher means is forced against the resilient means whereby fluid under pressure is admitted to the cylinder on one side of the piston to move the pusher means against the workpiece.

References Cited in the file of this patent UNITED STATES PATENTS 527,981 Higgins Oct. 23, 1894- 739,292 Compton Sept. 2 1903 1,804,735 Barnes et a1 May 12, 1931 2,234,153 Herbert Mar. 4, 1941 2,289,967 Johnson July 14, 1942 ,357,695 Skowron Sept. 5, 1944 2,394,514 Evans et a1. Feb. 5, 1946 2,395,397 Croft Feb. 26, 1946 2,445,985 Werner July 27, 1948 2,504,665 Douglas Apr. 18, 1950 2,614,316 Daily et a1. Oct. 21, 1952 2,642,045 Potts June 16, 1953 2,790,230 Sobek Apr. 30, 1957 2,792,785 Hayden May 21, 1957 UNITED STATES PATENT oTTTcE CETIFICATE I @Q I EUHN I ,1. mp; 1 5: Eetent No., 2,908,793 .mughSu 4/, -59.,

Thomas 0., Kane It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction and that the said Letters Patent should readas corrected below.

Column 9 line :55, after "descaling liquid." a comma-1.,

Signed and sealed this 16th day of .E'ebruery 1960 (SEAL) Attest:

K2351 AXLINE ROBERT C. WATSON Attesting Officer Commissioner of Patents

Patent Citations
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US1804735 *Oct 2, 1929May 12, 1931American Rolling Mill CoHydraulic scaler
US2234153 *Feb 16, 1939Mar 4, 1941United Eng Foundry CoMethod and apparatus for manufacturing metallic strip
US2289967 *Aug 1, 1940Jul 14, 1942Nat Tube CoHydraulic descaler
US2357695 *Aug 17, 1943Sep 5, 1944Woodings Verona Tool WorksSplice bar descaling method and apparatus
US2394514 *Dec 3, 1942Feb 5, 1946American Car & Foundry CoProcess and apparatus for scaling hot metal objects
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US2445985 *Jan 28, 1946Jul 27, 1948Frank P WernerCombined fluid-operated motor and pump
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2961741 *May 9, 1956Nov 29, 1960American Steel FoundriesHydraulic descaler
US3144361 *Sep 21, 1959Aug 11, 1964Stefan KlinghofferPretreating iron or steel
US6273790Dec 6, 1999Aug 14, 2001International Processing Systems, Inc.Method and apparatus for removing coatings and oxides from substrates
Classifications
U.S. Classification29/81.8
International ClassificationB21B45/08, B21B45/04
Cooperative ClassificationB21B45/08
European ClassificationB21B45/08