US1393501A - Drop-hammer - Google Patents

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Publication number
US1393501A
US1393501A US274273A US27427319A US1393501A US 1393501 A US1393501 A US 1393501A US 274273 A US274273 A US 274273A US 27427319 A US27427319 A US 27427319A US 1393501 A US1393501 A US 1393501A
Authority
US
United States
Prior art keywords
hammer
wheels
motor
driving
frame
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
US274273A
Other languages
English (en)
Inventor
Otis R Clark
Charles H Franklin
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Priority to US274273A priority Critical patent/US1393501A/en
Priority to FR512839A priority patent/FR512839A/fr
Application granted granted Critical
Publication of US1393501A publication Critical patent/US1393501A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/36—Drives for hammers; Transmission means therefor for drop hammers
    • B21J7/42—Drives for hammers; Transmission means therefor for drop hammers operated by rotary drive, e.g. electric motors

Definitions

  • the present invention relates to drop hammeisand particularlyto what is commonly known as board drop hammers.
  • Such hammers comprise a heavy weight termed the hammer which moves vertically between two side frames or guides, and has. attached to it a board which extends up betweentwo rollers which may be moved into and out of engagement with the board.
  • the rollers. which are continually operatino are moved to frictionally engage the board on opposite sides to lift it after which they release the board and permit the hammer to drop.
  • the rollers. must rotate in opposite directions.
  • the rollers of drop hammers have in practice always been driven by wheels and belts from line shafting.
  • the objectof thepresent invention is to overcome theabove noted objections and to provide an improved arrangement of drop hammer driving mechanism whereby each hammer is self contained. including all the driving wheels. beltsand driving motor. and
  • a drop hammer when in operation sets up vibrations of considerable magnitude and a further object of our invention is to provide an arrangement in a motor driven drop hammer wherein vibrations from the hammer will not be transmitted to any great extent to the motor.
  • Figure 1 IS a side elevathe straight belt. giving rise to a certainftion of a motor driven drop hammer eininequalitv of action.
  • the use of line shaft-j ing is highly objectionable.
  • -lt has to be suspended from the roof of the building or from pillars. which either makes it impossible or greatly interferes with the use of overhead cranes' Any.
  • trouble affecting the line shaft or a hammer causes the whole line of machines to be affected to a greater or lesser extent. usually the whole line has to be shut down.
  • the apparatus On account of the noise in a hammer shop it is very difiicult or impossible to detect small faultsand as a result the apparatus is usually: run until something breaks. necessitating a shut down.
  • Fig. 2 is an end view of the motor end of the drop hammer
  • Fig. 3 is a top plan view of the motor end
  • Fig. 4 is a plan view of the hammer end indicates the hammer or weight. 8 the mem-- ber commonly termed a board attached thereto. and 9 the side. frames or guide. The board passes between friction rollers 10 to the drop hammer frame.
  • -It is preferable to'a-ttach the inner end ofthe support to the frame by a hinge joint since this obviatcsthe necessity of extreme accuracy in the settin scof thehammer frame and tower with respect to each other. Further thearrangemcnt ermits the hammer frame to settle slight y without" stressing the supporting member as it other? wise woulddo. Where the use of an overhead crane. is not desirable or necessary the outer end of the supporting member may be suspended by an auxiliary support from the ceiling.
  • the motorand-parts directly asso ciat-ed therewith are located preferably with their center of gravity over the supporting block so thatone part counterbalances the other'part.
  • The-supporting member is made sulliciently-long to give a suitable distance between driving centers and while itmay be formed of any suitable material it is "decrease the overhang, drives two drivingbelt wheels which are belted toithe belt.
  • the motor shaft is connected to the same through suitable gear ing which serves to drive one belt wheel .
  • the'sup-qo orting member illustrated comprises a ilame built up of two side beams 19 and 20 with their ends held in spaced relation to each other by suitable cross pieces, said beams being still enough to prevent buckling.
  • the inner ends of the beams 19 and 20 are clamped between plates 21 and hinge irons 22 by bolts 23 andsuitable top and bottom cross pieces 24 and 25 are riveted or otherwise fixed to so
  • faces of beams 19 and 20 are angle iron braces 26 rivet-ed to the hinge channel irons 22 which serve to take the longitudinal thrust on beams :19, 20 due to the pull of the belt drive. This'relieve's the strain on bolts 23.
  • Thel two hinge irons 22 terminate in eyes 27 through which )fLSSES a shaft28 carmed by arms 29 whic project from side frames 9.
  • the inner end of the supportine' member is hinged to the drop hammer.
  • the outer. ends of beams 19' and 20 are bolted channelirons 30, Fig. 2,,to which are fastened top and bottom cross pieces 31 and 32.
  • Beneath the outer end of theframe which forms the motor support isan auxiliary support, tower or column 33 whi'chmay be built up in any suitable manner and on tower is a cushion 34 upon which directly rests the bottom cross piece 32 to support the outer end of the supporting frame.
  • the cushion should beof non-resonant material and we have found a block of hard wood to be satisfactory for the purpose.
  • This block prefer- 1 05 ably extends across the entire top of the tower so as to revent the outer end of the frame from twlsting as it tends to do under the action of the motor, fly wheel and belts.
  • bolts 35 are provided which pass v through oversize openings in bottom cross pieces 32 and the top of tower 33.
  • the said bolts 35 serve also to hold the outer end of 1,15 the supporting frame from any substantial lateral movement, although owing to the oversize openings through which the bolts pass, an'a justing movement is permitted case thedrop hammer should settle.
  • I 1 20 Mounted on top cross pieces 31 is a gear casing which is split horizontally to form a bottom portion 36 and a cap 37 and supported by hearings in the gear casing are shafts 38'and 39 which carry on their adja- 1 25 cent ends gear wheels 40 -and 41 respeetively and on their outer ends driving belt wheels Supported by bearings 44 in the gear casing is a pinion shaft 1 on o osite sides with gear wheels 40 and 'to'r drive a new board may be readily in 41.
  • he pinion 46 when turned, therefore, serted inthe hammer without danger to the will drive gear wheels 40 and 41 in opposite repair man because there need be no belts directionsf Shaft 45 projects beyond the or rollers in motion.
  • the arrangement also casing at both ends and at one end it carries avoids the use of objectionable guy rods and a fly wheel 47 which assists the motor in .the tensions on the belt may be made uniform taking up the load and at its other end it even though the hammer itself gets slightly is coupled to shaft- 48 of a motor 49. Motor out of perpendicular. It also .has the ad- 49' is mounted on a'platform .50 which is vantage of saving power because it is possiload.
  • the motor, gearing-and fly wheel may be considered as a single unit and such unit'is so located on the end of the Supporting frame that its center of gravity comes over the block 34.
  • the (lIlVln' belt wheels 42 and 43 are belted to whee silt and '15 by bolts 51 and 52 which oiraccount of their.
  • the fly wheel 47 performs the usual func-, tion of storingenergy from the motor during periods of light load, which energy is relea'sed'to assist the motor during periods of heavier loads. It also assists in counter balai'iting the weight of the motor.
  • hammer, mechanism f ormoving the a'ctua tors wh ch includes driving and driven wheels'a'n'd yielding means to absorb-the shock between the driving wheels and the actuators an electric motor connected to the driving wheels.
  • means having one end fastened to and supported by the frame for holding th 'inotor and riving wheels in pre- 4 determined position with .respect to the driven wheels. and .an auxiliary support for the other end of said means.
  • a drlven' stationary supporting and guiding frame therefor a pair of friction rolls arranged wheel for each roll, a driving wheel for each j driven wheel, a belt connecting each driving wheel with its driven wheel, said belts serving as driving means and also as shock abs sorbing means, an electric motor which is common to and drives both of the driving wheels, a support for the motor comprising two members which are hinged to the main spaced relation with; respect to :the main frame and also prevent lateral movement of the motor, and a vertical column arran ed near the outerend of thesupport upon wh ch such outer end'l'rests.
  • a main frame a hammer, a board for actuating it, a pair of friction rolls arrangedito raise and release the board andthanimer, a driven wheel for each roll, said wheels being arranged on of) posite sides of the frame, a pair of spaced non-resonant bars which are attached at one end to the main frame and are connected by a 1platform at their outerends, a pair ofvbelt w eels and their shafts, means mounted on the platform for supporting the shafts and wheels, gears mounted on the shafts for ro-- tating them in opposite directions, anelectric motor having a driving gear which meshes with the gears on the shafts, belts connecting the driving and driven wheels, and an auxiliary support for said platform.
  • hammer a board for actuating it, a pair of friction rolls arranged to raise and release the board and hammer, adriven wheel for" each roll, said wheels being arranged on opposite sides of the frame, a pair of spaced non-resonant bars which are attached at one :end to the main frame and are connected by a platform 'at their outer ends, a gear box zo mounted on the platform, a pair of wheels and'shafts supported bythe box, gearinggin the box'for driving thesha fts in opposite directions, an electric motor carried by the 8.
  • the-boardand hammer a driven wheel for a5 each roll, said wheels being mounted on opposite" sides of the frame, a non-resonant support hingedto'the frame at. its inner end and supported at its outer end, a pair of driving wheels and their shafts mountedfoii '90 rections which is located between the wheels and the main frame,'and means transmitting motion from theldriving to the driven wheels.”
  • a main frame a ammer, a board for actuating it, a pairof friction rolls arranged to raise and release the boardand hammer, a driven wheel for each roll, said wheels being mounted on opposite sides of the frame, a non-resonant support hinged to the frame .at its inner end and supported at its outer end, a pair of 1 05 driving wheels and their shafts mounted onthe outer end of the support, an electric motor for driving 'saidwheels in opposite directions which'is located between the wheels and outer end ofthe' motor shaft which in addition to'acting as such acts as a co'unterbalancepand means for transmitting motion from the driving to the driven wheels.
  • the combination m a d-ropdiammer, of a frame, drop hammer mechanism-carried thereby, a. supporting member having one end connected to and supported" by the frame, means supporting the other end of said member, a motor supported on the said.
  • a supporting member having one end conneoted to the drop hammer, means for supporting the other end of said member, a motor anda pair of driving belt wheels mounted on. said'last named end, a gearing betweenthe motor and said belt wheels wherer by the motor drives one belt wheel in one said member, and driving belts connectingthe motor to the drop hammer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
US274273A 1919-01-31 1919-01-31 Drop-hammer Expired - Lifetime US1393501A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US274273A US1393501A (en) 1919-01-31 1919-01-31 Drop-hammer
FR512839A FR512839A (fr) 1919-01-31 1920-03-31 Marteaux à chute libre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US274273A US1393501A (en) 1919-01-31 1919-01-31 Drop-hammer

Publications (1)

Publication Number Publication Date
US1393501A true US1393501A (en) 1921-10-11

Family

ID=23047536

Family Applications (1)

Application Number Title Priority Date Filing Date
US274273A Expired - Lifetime US1393501A (en) 1919-01-31 1919-01-31 Drop-hammer

Country Status (2)

Country Link
US (1) US1393501A (fr)
FR (1) FR512839A (fr)

Also Published As

Publication number Publication date
FR512839A (fr) 1921-02-01

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