US1028927A - Feed mechanism for punching-presses. - Google Patents

Description

VAN TUYL H. BIEN.

FEED MECHANISM FOR PUNGHING PRESSES.

APPLICATION FILED 001. so, 1911.

1,028,927. Patented June 11,1912.

2 SHEETS-SHEET 1.

COLUMBIA PLANouRAPu 60., WASHINGTON, n. c.

v VAN TUYL H. BIEN. FEED MECHANISM FOB. PUNGHING FBESSES.

APPLIOATION FILED 001. 30, 1911.

I Patented June 11, 1912.

2 SHEETS-SHEET 2 amomlioz COLUMBIA PLANOGRAPH cm, WASHINGTON, n. c.

.f f E VAN 'IUYL H. BIEN, 0F QUINCY, MASSACHUSETTS.

FEED MECHANISM FOR PUNCHING-PRESSES.

Specification of Letters Patent.

Patented June 11,1912.

Application filed October 30, 1911. Serial No. 657,542.

To all whom it may concern:

Be it known that I, VAN TUYL H. BIEN, a citizen of the United States, residing at Quincy, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Feed Mechanism for Punching-Presses, and do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to machines for punching metallic sheets, bars, and structural iron generally, but more particularly to power presses or punches for the purpose stated, including mechanism for feeding the material to be operated upon, and means, attached to the press frame for automatically controlling the feed mechanism with accuracy and precision.

It has for its primary object the punching of holes, particularly rivet holes, singly or in prescribed groups in the sheet metal plates ordinarily employed in ship-building, in which latter connection it is a well recognized fact that the rivet holes occur in groups which are the same throughout a large portion of the vessel according to the individual frame spacing specified.

Obviously, however, the present invention is applicable tothe punching of angle clips, intercostal stringers, and to a large variety of structural plates, beams or members, for example, bridge girders, wherein a system of space repeating or grouping of holes is followed, and wherein an error in spacing, particularly an accumulative error would be fatal.

The invention will be hereinafter particularly described and pointed out in the claims following.

In the accompanying drawings which form part of this application for Letters Patent, and whereon like numerals refer to corresponding parts in the" several illustrations: Figure 1 is a side elevation of a portion of a punching press frame, a portion of an adjacent work-bearing carriage with a plate in position to be punched, and the feed-mechanism in operative relation. Fig. 2 is an edge view of a graduated spacingrack attached to the work-bearing carriage, with a series of adjustable clamps afiixed thereto for limiting the intermittent movement of said carriage. Fig. 3 is a face view of a stop member partly in section'mounted upon the press frame for cooperating with the clamp members aforesaid to arrest them in their forward movement. Figs. 4, 5 and 6 are views similar to Fig. 3 showing said stop-member in different operative positions and a section of one spacing clamp in different stages of advancement. Fig.7 is a transverse sectional view through; the stop-member showing in side elevation its within contained spring-pressed latch, and, Fig. 8 is a top plan view of mechanism'car ried by the press rocker-arm for automatically lifting the stop-member upon ne -votal support, between the punching tions, to permit passage of the sp clamps. I "if Reference being had to the drawings and numerals thereon, 1 indicates a punching press frame, of any approved form; 2 a

suitable power actuated rockerarm, pivotally mounted as at 3, and 4 a'punch or punches all of well known construct-ion and therefore diagrammatically represented, it being understood that suitable operative connections are provided, that the rockerarm 2 may be manually, mechanically,or hydraulically operated," and that the punch or punches 4 may comprise a single member or a group of such members varying in number and arrangement according 'to individual requirements.

' Crossing in front of the press 1 is a pair of tracks 5, one only being shown, upon which is mounted a work-bearing carriage the latter traveling upon a suitable number of wheels 6 machined to fit said tracks with as little clearance as practicable. Upon the press side of this carriage the projecting axles 7 are mounted in enlarged cylindrical bearings 8 from which rise an integral web 9 to which is bolted a longitudinal girder 10,

serving as a partial support for a superstructure of skeleton form comprising transverse girders 11 bolted in place, and constituting a flat surface upon'which the plate 7 secured a graduated spacing rack 14: scaled 1 upon its outer edge in inches and feet and running the length of the carriage as best shown by Fig. 2. Adj ustably mounted upon rack 14 are bifurcated clamps 15, 16, 17 and .18 each provided with teeth 19 upon its upper inner surface adapted and arranged to mesh neatly with the teethof the spacing rack 14 aforesaid, into contact with which they may be securely but removably drawn by agency of hand screws 20 below. WVhile projecting from each of said clamps is an arm or lug 21, for purposes which will later appear.

Pivotally mounted as at 22 upon the press frame 1 is a stop-member 23 of substantially cylindrical form, having a transverse pocket 24 in its upper portion containing a bolt 25 spring pressed as at 26 so as to normally project in a downward direction and hav,

inga beveled lower edge 27. Beyond said bolt 25 this stop member 23 is provided upon its under surface with a transverse rib or lug 28, while projecting from the opposite side of its pivotal support 22 is a depending arm or lever 29 for use in automatically andperiodically elevating the outer portion of said stop member 23 through the medium of a floating link 30, a bell-crank lever 31 pivoted at 32 uponthe pressframe, and a vertically reciprocating push-rod 23 slidably mounted upon the press frame adjacent to its rocker arm 2. Immediately above the T end 34 of said push rod 33 and in alinement with the latter is pivotally secured tothe rocker-arm 2 an actuating bell-crank 35, the upper end whereof, by agency of a spring 36, is adapted to be held normally against a fixed lug 37 projecting from the rocker-arm, and the opposite or lower end whereof is consequently adapted to engage the T end of push rod 33 when the inner end of rockerarm is depressed for the purpose of raising or retracting the punches 4. Below the said bell-crank 35 there is a lug 38 rising from the upper part of the press frame 1 adapted to obstruct the downward movement of said bell-crank 35, as shown in dotted lines by said Fig. 1 just before the inner end of rocker-arm 2 has reached the limit of its stroke.

In addition to the automatic action of the stop member 23 above set forth, this member 23 may be elevated by hand when occasion requires to a position indicated by dotted lines in Fig. 1, beyondthe reach and influence of actuating bell-crank 35 and its operative connections in which position it may be retained by means of a pin 39 adapted to be inserted in a hole 40 just back of the lever 29 for purposes which will later appear. Adjacent to one end of the stop-member 23 there is a latch 41 having a slotted pivotal connection 42 with a fixed projection upon the face of frame 1, also a counterbalancing weight 43 at one side of said pivot-a1 connection and a tooth 44 at the opposite side for engaging beneath the lower edgeof member 23 when raised to temporarily retain it in a raised position.

Having thus described my invention, its use and operation as a machine for punching rivet holes, for example, in prearranged groups, may be briefly set forth as follows:

Presuming for purposes of illustration that a ships shell or deck plate 12 has been securely clamped upon the girders 11, or the upper surface of the work-bearing carriage. An operator now advances the entire structure upon its wheels 6 until the pro jecting arm 21 upon the first clamp 15 passes under the spring-pressed latch 25 and is arrested between it and the transverse rib or lug 28 of the stop-member 23 as shown by Fig. 4. A downward thrust of the punches 4, whether there be one or a dozen or more, now perforates the plate 12 whereever they contact with it, for example, throughout one entire frame-space of the ships plate; withdrawal of the punches 4 next results in a downward movement of the inner end of rocker-arm 2, with the result that the lower end of actuating bell-crank 35 bearing upon the T head or upper end of rod 33 operates through bell-crank 31, floating lever 30, and arm 29, to raise the entire stop member 23 upon its pivotal support 22 until the tooth 44 of latch 41 engages beneath the lower edge of said member to temporarily retain it in an elevated position, as shown by Fig. 5. At this in stant the spring-pressed end of actuating bell-crank 35 upon the inner end of descending rocker arm 2, contacts with the fixed lug 38 and is thus tripped upon its pivotal center so as to dislodge it from the upper end of push rod 33, as shown by dotted lines, leaving the latter free to moveupward under the overbalancing weight of the stopmember 23 after same has been liberated by av passing arm 21 of a clamp member 15, 1t 17 or 18. Further advancement of the workbearing carriage, by hand or otherwise, 110W causes project-ion 21 of the foremost of said clamps 15 to trip latch 41 in its passage, thus dropping the stop-member 23 by gravity to its normal position as shown in full lines by Fig. 1. The entire group of holes thus punched in plate 12 are now passed beyond the range of punches 4 by a further advancement of the work-bearing carriage until arrested by engagement of the pro jection 21 upon the second clamp 16 exactly as before. The operation hereinbefore described may then be repeated as often 13 may be desired, the number and frequency of such repeated operations depending upon the length of the plate to be punched, the number of clamps secured upon the graduated spacing rack 14 and their relative spaces or distances of separation as indicated by the scale of inches and feet upon the outer edge of said rack. The required number of rivet holes having been thus ac curately and quickly punched the carriage.

may be run back to the starting point by hand or otherwise for the reception of a new plate or the same plate in a reversed or new position, the stop-member 23 having first been elevated to the highest position indicated by dotted lines in Fig. 1, and there temporarily retained by means of pin 39 inserted in the hole 40 back of the depending arm 29. It will be noted further that stopmember 23 is actuated by unitary means under control of the press rocker-arm for automatically removing said stop-member from the path of the clamp arms 21; that is to say there is but one stop-member required, and this, in its operation, is engaged by each of the said clamp arms successively.

This being a description of my invention in its best form of construction at present known to me it should be understood that various changes in the construction, arrangement and combination of parts hereinbefore specified may be made and substituted without in the least departing from the spirit of this invention which will now be set forth in the following claims:

1. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a clamp aflixed to said carriage having a projecting arm, a stop-member upon the press frame normally in the path of said arm, and unitary means under control of the press rocker-arm for automatically removing said stop-member from the path of said clamp arm. a

2. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a spacing rack on one side of said carriage, a clamp adjustably affixed to said spacing rack having a projecting arm, a stopmember upon the press frame normally in the path of said arm, and unitary means under control of the press rocker-arm for automatically removing said stop-member from the path of said clamp arm.

3. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a graduated spacing rack on one side of said carriage, a plurality of clamps adjustably aflixed to said spacing rack, a horizontal arm projecting from each of said clamps, a stop-member upon the press frame normally in the path of said arms, and unitary means under control of the press rockerarm for automatically removing said stopmember from the path of said clamp arms.

4. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a graduated spacing rack on'one side of said carriage, a plurality of adjustable spacing clamps having teeth adapted to engage with those of the rack aforesaid, a horizontal arm projecting from each of said clamps, a stop-member pivotally supported upon the press frame normally in the path of said arms, and means under control of the press rocker-arm for automatically raising said stop-member out of the path of each successive clamp arm.

5. Feedmechanism for punching presses comprising in combination a Work-bearing carriage, a series of spacing clamps affixed to. said carriage each having a projecting arm, a stop-member upon the press frame having a transverse rib normally in the path of said arms, and means under control of the press rocker-arm for automatically removing said stop-member from its normal position to permit passage of the clamp arms aforesaid after performing their respective functions.

6. Feed mechanism for punching presses comprising in combination a work-bearing carriage, a series of spacing clamps aflixed to said carriage each having a projecting arm, a stop-member upon the press frame having a yielding latch and a relatively fixed transverse rib normally in the path of said arms, and means under control of the press rocker-arm for automatically removing said stop-member from its normal position after each punching operation.

7. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a series of adjustable spacing clamps affixed to said carriage each having a projecting arm, a stop-member upon the press frame normally in the path of said arms, means under control of the press rocker-arm for automatically lifting said stop-member to permit passage of the succeeding clamp arms after each. punching operation, a latch for retaining said stopmember temporarily raised, and means for tripping said latch, by a continued movement of said projecting arm.

8. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a series of adjustable spacing clamps affixed to said carriage each having a projecting arm, a stop-member upon the press frame normally in the path of said arms, means under control of the press rocker-arm for automatically lifting said stop-member to permit passage of a clamp arm after each punching operation, a countervveighted lat-ch having a slotted pivotal support for retaining said stop-member temporarily raised, and means for tripping said latch by a continued movement of said projecting arm.

9. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, a "series of adjustable spacing clamps affixed to said carriage each having a projecting arm, a stop-member pivotally mounted upon the press frame normally in the path of said arms, a vertically movable push rod connected to said stop member back of its pivotal support, an actuating bellcrank carried by the press rocker-arm for engaging said pusher rod to depress it, and means for automatically disengaging said bell-crank and rod at the limit of their downstroke. r

10. Feed mechanism for punching presses comprising in combination a Work-bearing carriage, in a series of adjustable spacing clamps affixed to said carriage each having a projecting arm, a stop-member pivotally mounted upon the press frame normally in the path of said arms, a vertically movable pusher rod for lifting said stop-member out of the path of said arms, an actuating be1l crank yieldingly held in its normal and op- 5 said bell-crank out of operative engagement 20 With the pusher rod at the limit of its dOWn' stroke.

In testimony Whereof I affix my signature, in presence of two subscribing Witnesses.

VAN TUYL H. BIEN. Witnesses:

F. A. DRAKE, G. F. THORNTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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