US1844107A - Operating mechanism for metal-cutting shears - Google Patents

Operating mechanism for metal-cutting shears Download PDF

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Publication number
US1844107A
US1844107A US366012A US36601229A US1844107A US 1844107 A US1844107 A US 1844107A US 366012 A US366012 A US 366012A US 36601229 A US36601229 A US 36601229A US 1844107 A US1844107 A US 1844107A
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US
United States
Prior art keywords
valve
steam
shear
piston
exhaust
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
Application number
US366012A
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English (en)
Inventor
John W Sheperdson
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.)
Siemens Industry Inc
Original Assignee
Morgan Construction Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Morgan Construction Co filed Critical Morgan Construction Co
Priority to US366012A priority Critical patent/US1844107A/en
Priority to GB8057/30A priority patent/GB341772A/en
Priority to FR692339D priority patent/FR692339A/fr
Priority to DE1930588919D priority patent/DE588919C/de
Application granted granted Critical
Publication of US1844107A publication Critical patent/US1844107A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
    • B23D25/02—Flying shearing machines
    • B23D25/06—Flying shearing machines having a cutting device mounted on an oscillating lever
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4749—Tool mounted on oscillating standard
    • Y10T83/4751—Both tools of couple on single standard
    • Y10T83/4754—One tool swings out of work path on return stroke

Definitions

  • the present invention relates-to operating mechanism for metal-cutting shears of the type known as flying shears, which are employed in steel mills to cut the rapidly moving hot rolled product of the mill into com- I flareal lengths as fast as it is delivered from the finishing rolls.
  • Such a shearing mechanism employing a steam-operated piston and cylinder unit for securing the travel of the cooperating shear blades in unison with the stock, so as not to retard the-movement of said stock while the successive cuts are taking place, is shown and described, for example, in United States Letters Patent No. 1,521,514 of V. E. Edwards,
  • Such a slow return stroke which is characteristic of the action of all previous steamoperated flying shear mechanisms. serves well enough when the moving stock is being .cut up into relatively long pieces, as such lengths give ample time for the cooperating shear blades, after taking each cut, to'return to their normal stationary open positions. But for cutting the moving stock into shorter pieces, or even into longer pieces where the delivery speed of the stock is quite high, such a slow return movement of the flying shear 1929. Serial no. 386,012.
  • F ig. 2 is a large scale longitudinal sectional view of the piston and cylinder unit, and associated valve parts, which are employed, according to my invention, for the operation of the shear.
  • Figs. 3 and 4 are diagrammatic views, similar to Fig. 2, on a smallerscale, showing the parts in different positions.
  • Figs. 5 and 6 are fragmentary sectional views illustrating the pilot valve construction which may be employed for the actuation of the main steam valve of the piston and cylinder unit, Fig. 5 being a section in the plane of line 5-5, Fig. 2, and Fig. 6 being a larger scale section in the plane of line 6-6, Fig. 5.
  • the shearing mechanism proper which may be of substantially the same type as that shown and described in the aforesaid Edwards Patent No. 1,521,514, is mounted on a suitable base 1, the latter providing a trunnion 2 for the swinging shear frame 3.
  • Said shear frame 3 provides the usual opening 4 for the continuous passage therethrough of the rapidly moving rolled product 5 of the mill, travelling in the direction of the arrow A on which, I
  • transverse shaftll are a pair of connecting rods 14, 14 (only one being shown), the latter-being connected to and operated from a reciprocating cross head 15, which is attached to a shear-operating piston 16, contained in the steam cylinder, designated as a whole by the numeral 17, of my invention.
  • Fig. 2 shows the piston 16in a position corresponding to the normal at-rest posi- 25 tion ofthe shea'r'frame'3, as shown in Fig.
  • the cylinder '17 has associated there- 39 with the inclosing casing 20 of a slide valve 21, hereinafter termed the main valve, which is mounted in a suitably ported "sleeve 22 received in the bore of casing 20 and closed 'at its ends by the heads '23 and 24.
  • Said casing 20' provides a pair of steam inlet connections 25 and 26'and a single exhaust steam connection 27 all in constant communication with the, interior of the lining sleeve 22.
  • the main valve 21- provides two intermediate skirted piston portions 32 and 33, the
  • said main ,valve provides a guiding piston portion- 34, whose movement in the sleeve 22 gives the efi'ect substantially of a dash pot.
  • said main valve provides,
  • the main valve portion 35 is the means by which the entire valve 21, with its several parts32, 33 and 34, is shifted longitudinally in the sleeve 22, to obtain the working and return strokes ofpiston 16 w ithin the cylinder.
  • the main valve 21 occupies its extreme right hand position, owing to unbalanced steam pressure.
  • Said .pilot valve and its appur tenant devices which form no part of the present invention, may be of any suitable construction; as here'shown by way of example, a rotary pilot valve of the type disclosed in the aforesaid Edwards patent may be employed.
  • the main valve casing 20 has secured thereto on one side, in the vicinity of'the space 38, a pilot valve casing 39, the bore of which, on an axis at right angle to that of the main valve casing bore, receives a rotary valve member 40.
  • Communicating'with and parallel to the bore of the pilot valve casing 39 are two pairs of diametrically opposite passages-41, 41 and 42 42, the last named having extensions 43, 43 that open into the space 38,
  • pilot valve 40 extends diametrically across the bore of its casing .39, and inthe position shown in Fig. 6, it blanks 0E and closes thetwo passages 42, 42 that communicate with the space 38. Pilot valve 40 is secured to the end of'a valve stem 45, by therotation of which said valve is carried into a succession of different positions, relative to the pairs of passages 41, 41 and 42, 42.
  • the-valve 40 is adapted t be moved, intermittently, through angles ofwforty-five degrees, in order first, to connect adjacent passages 41 and 42, and then, to blank ofi' either .pair of diametrically opposite passages,-'repeating this operation, for each operation of the shear.
  • pilot valve operating mechanism forms of itself no part of my invention, and hence need notbe shown or de- For operating the pilot valve 40, any suit-- scribed in detail herein. It sufficient to note that each operative movement of the pilot valve 40, to initiate a cut of the shear,
  • valve 40 may be made responsive to the travel of the stock 5, and that each reset movement of the pilot valve 40 may be made responsive to the swing of the shear frame, all as fully described in the aforesaid Edwards patent, and as here shown schematically in Fig. 1.
  • the stem of valve 40 carries a ratchet wheel 46, whose teeth are adapted to be engaged by a pawl 46, which is'pivotally carried at 47 by a bent lever 48, the latter being journalled loosely on the end of valve stem 45.
  • the free end of said lever 48 is connected by a link'49 with the trigger mechanism 50 of the shear, the latter providing a finger 51, depending from a rock shaft 52 which is connected by an 'arm 53 with the link 49.
  • valve 21 With this left-hand shift of valve 21, its portion 33 uncovers the exhaust passage 31 and covers the inlet passage 29, as shown in Fig. 3; in this way, not only is the ingress of live steam from inlet 26 to the interior of the cylinder 17 cut off. but the steam thenin said cylinder on the left hand side of piston 16 undergoes an immediate drop in pressure, because of the connection established by passage 31 with the exhaust outlet 27.
  • This left-hand movement of valve 21 also carries the valve portion 32 to a position where it covers the exhaust passage 30 and uncovers the inlet passage 28 at the upper end of the cylinder. so
  • the pilot valve 40 is reset, by another movement through fortyfive degrees, to block 0d the communication between the passages 41, 41 and 42, 42.
  • This may be effected, as described in the aforesaid Edwards patent, by the movement of the shear frame 3 itself, which takes place, as above described, onthe left hand stroke of piston 16, as shown in Fig. 3.
  • the mechanism for thus resetting the pilot valve 40 forms no part of the present invention; said mechanism may be of the type shown and described in the aforesaid Fay and Dahlstrom application, or it may be, as shown in Fig. 1, of the character described in the aforesaid Edwards patent,
  • the portion 32 thereof With this movement of the main valve, the portion 32 thereof, as shown in Fig. 4, uncovers the exhaust passage 30 so as to connect the right hand end of cylinder 17 with the exhaust outlet 27 at the same time, the portion 33 of said main valve uncovers the inlet passage 29 and thereby allows the full pressure of steam from the inlet 26 to be exerted against the left hand side of piston 16, so as to produce a rapid return movement of said piston to the normal position shown inFig. 2.
  • the return stroke of the shear frame 3. is effected, the same as the operative stroke,'by opening one end of the cylinder to exhaust, and by'making the full steam pressure effective on the other side of the piston; in other words, for each complete cycle of operation of the shear frame, operative swing and return swing, there is simultaneously procured an admission of live steam against one side of the piston, and an exhaust of steam from the other side toward which the piston move ment takes place.
  • the return swing of the shear frame may be made just as rapid and just as positiveamovement as the operativeswing.
  • Each of the exhaust passages 30 and 31 is provided with an adjustable valve 60, which may be manually set, as described in the aforesaid Edwards patent, to control the rate at whichthe steam, from one end or the other of the cylinder, is exhausted, both on the operative and on the return strokes.
  • the speed of the operative or cutting stroke of the shear may be definitely and ac;' curately predetermined by the setting of the exhaust valve 60 inthe passage 31,-this valve being set in a position which corresponds to the particular speed at which the material 5 is being delivered from the mill.
  • the other exhaust valve 60 in the passage 30 can be set to obtain any desiredfspeed for-the return stroke of the shear frame.
  • eachcutting stroke of the shear by opening one end of said cylinder to steam pressure and the other to exhaust, means responsive to the cutting stroke so initiated for shifting said valve means to open thefirst-named end of said said cylinder to exhaust and the other to steam pressure, thereby to produce the return of'said shear to normal rest or open position, and means to adjust the exhaust openings from each end of said cylinder, thereby to control the speed of both the-cutting andthe return strokes of said shear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • External Artificial Organs (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Control Of Turbines (AREA)
US366012A 1929-05-25 1929-05-25 Operating mechanism for metal-cutting shears Expired - Lifetime US1844107A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US366012A US1844107A (en) 1929-05-25 1929-05-25 Operating mechanism for metal-cutting shears
GB8057/30A GB341772A (en) 1929-05-25 1930-03-12 Improvements in or relating to operating mechanism for metal-cutting shears
FR692339D FR692339A (fr) 1929-05-25 1930-03-20 Mécanisme de commande pour cisailles à métaux
DE1930588919D DE588919C (de) 1929-05-25 1930-03-30 Antriebsmechanismus fuer eine fliegende Schere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US366012A US1844107A (en) 1929-05-25 1929-05-25 Operating mechanism for metal-cutting shears

Publications (1)

Publication Number Publication Date
US1844107A true US1844107A (en) 1932-02-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US366012A Expired - Lifetime US1844107A (en) 1929-05-25 1929-05-25 Operating mechanism for metal-cutting shears

Country Status (4)

Country Link
US (1) US1844107A (fr)
DE (1) DE588919C (fr)
FR (1) FR692339A (fr)
GB (1) GB341772A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639736A (en) * 1947-09-30 1953-05-26 Warner Swasey Co Machine tool feed
US2798547A (en) * 1954-11-01 1957-07-09 Spring Machinery Company Cutter unit
US3320973A (en) * 1964-12-31 1967-05-23 Salem Valve Company Apparatus for controlling fluid flow
US3802319A (en) * 1971-12-27 1974-04-09 Caterpillar Tractor Co Cushioning device for hydraulic cylinders
US4221145A (en) * 1977-11-14 1980-09-09 Fuji Photo Film Co., Ltd. Running web cutting machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639736A (en) * 1947-09-30 1953-05-26 Warner Swasey Co Machine tool feed
US2798547A (en) * 1954-11-01 1957-07-09 Spring Machinery Company Cutter unit
US3320973A (en) * 1964-12-31 1967-05-23 Salem Valve Company Apparatus for controlling fluid flow
US3802319A (en) * 1971-12-27 1974-04-09 Caterpillar Tractor Co Cushioning device for hydraulic cylinders
US4221145A (en) * 1977-11-14 1980-09-09 Fuji Photo Film Co., Ltd. Running web cutting machine

Also Published As

Publication number Publication date
DE588919C (de) 1933-11-30
FR692339A (fr) 1930-11-04
GB341772A (en) 1931-01-22

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