US2363630A

US2363630A - Notching apparatus

Info

Publication number: US2363630A
Authority: US
Inventors: George F Wales
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-03-04
Filing date: 1942-03-04
Publication date: 1944-11-28
Anticipated expiration: 1961-11-28

Description

Nov.) 28, 1944. G. F. WALES 2,363,530

NOTCHING APPARATUS Filed March 4,v 1942 2 Sheets-Sheet l NOV- 28, 1944 .G. F. WALES 2,363,630

NOTCHING APPARATUS Filed Maron 4, 1942 2 sheets-sheet 2l Kw INVENTOR.

BY ATTORNEYS' .line 8 8, Fig. 1.

ures of the drawings.

Patented Nimes, 1944 UNITED STATE-s. PATENT' met t `No'rcmmu APPARATUS George F. Wales, Kenmore, N. Application Magen 4. i942'. serial No. 433,279 is csims. (ci. ici-so) notches able in operation and capable of having its cutting members quickly and easily sharpened without requiring extensive disassembling of the parts for this purpose..

Another object of this invention is to so construct the notching apparatus that it can bereadily operatedin association with the bed and ram of `an, ordinary press without requiring any mechanical connection therewith and thus may be quickly placed in a press for use and likewise removed therefrom when not required.

A .further object of this invention is to provide simple and eillcient means whereby the punch l arm and the die plate of the apparatus may be conveniently and reliably mounted on the base of the apparatus and permit of easily using diiferent pairs of die plates and punch arms for producing notches of diiferent shapes on the work- Pieces.

In the accompanying drawings:

Fig. 1A is a side elevation oi' one form of notching apparatus embodying this invention.

Fig. 2 is a front elevation of the same.

Fig. 3 is a top plan view thereof.

4 4, Fig. 2. v Y A t Fig. 5 is a horizontal section taken on line l-i.

Fig. 4.' i

Fig. 6 is a vertical llig. 7 is a fragmentary perspective viewof an angle -iron having its flanges notched by the use of the apparatus shown in Figs. 1-6.

Fig. 8 is a vertical longitudinal section of a notching apparatus embodying the present improvements but adapted more particularly for notching the ends of tubular workpieces.

Fig. 9 is a top plan view of the same.

Fig. 10 is a front elevation thereof.

Fig. 11 is a perspective view of a tube having its end `notched by the apparatus shown in Figs. 8, pand 10.

In the following description similar reference characters indicate like parts in thev several iig- Fig. 4 is a vertical longitudinal section taken on .line

transverse section taken on Although the apparatus shown in Figures 1-8 is more particularly designed for producing V- iron, as shown in Fig. f7, the same may also be employed for producing various forms ,of notches in the edges of sheet material orthe like by mak ing the cutting edges of the'die andpunch members, of the apparatus of the desired form.

Referring to the construction shown in Figs.

1-6. the numeral 20 represents 'the base .of the notching apparatus which may bemade of any suitable metal, but, preferably cast iron.` This base may alsobe of any desired contour although the rectangular form shown in the drawings is preferred. In its front part this baseis provided with a vertical discharge opening ,or chute 2i through which the slugs cut from the workpiece', during operation of notching the saine;y are discharged from the apparatus. this opening in the present case extending from the upper to the under side ofthe base, as shown in Fig. 4.

In its rear side the base is provided with a rearwardly opening recess` 22'and on the-central part otits upper side the sameis provided with an upwardly opening spring socket 23, 'On its rear part the base is provided with two bearing lugs 2t which projectupwardly along opposite sides of the recess 22 and each of which is provided on its front side with a retaining recess, groove or notch 25, the lower side of which the base, asbest shown in Figs. 1'4.

The numeral 26 represents a die plate of steel or the iikelwhich rests on the frontpart of the base and provided in its rear part with al die notch' 21- which extends to the rear edge of this plate and registers with the upper end of the slug chute in 'the'basa The corners between the top of the or worn by grinding the upper side of the die plate suillciently to restore these cutting edges. a'

The die plate. may be detachably secured to the base by various meansA but preferably by screws 29 passing upwardly through openings in the base and engaging threaded openings-in the die plate. For the purpose of an accurate position ber with which the die plate cooperates two dowels or alining pins 30 are employed. each of which is arranged in corresponding alining openings formed in the base and die plate.

For the purpose of assisting the screws 28 in holding the die plate on the base this plate engages its rear edge, on opposite sides .of its notch n.18 in the iianges. I8, Il of an'angle is flush with the top of maintaining the die plate in relative to the punch mem- L'and engaging its outer edge with a 21, with the retaining recesses or grooves of the lu 's 24, as shown in Figs. 1 and 4.

The umeral 3| represents a vertically swinging punch arm the rear part of which is arranged between the bearing lugs 24 and pivoted thereto by a horizontal pivot pin 32 passing transversely throughthe rear parts of said lugs and the punch arm, as shown in Figs. 1, 3 and 4. At its front end the punch arm is provided with a cutter blade or punch 33 which has a flat under side 34 and forwardly converging sides 35 so as to provideA the punch blade. In order to maintain the proper.

V-shape of the cutting edges 36 of the punch blade notwithstanding that some of the material is removed from its 4underside 36 during the sharpening operation the front end or edge 31 of the punch blade is curved concentrically with the axis of the punch arm, as shown in Figs. 1 and 4, thereby maintaining the proper v-formation of the cutting edge 33 on the punch blade regardless of the grinding for sharpening the same.

Depression of the punch arm for effecting a notching operation may be produced in any suitable manner, but preferably by placing the base of the notching apparatus on the bed of a press and engaging the top of the punch arm by the descending ram of the-press. 1

Raising of the punch arm is preferably effected by a lifting spring 33 seated with'its lower end in the spring socket 23 of the base while its upper en d is seated in a socket or recess 39 on the underside of the punch arm in front of its axis.

Upward movement of the punch arm is limited `by a stop 40 projecting downwardly from the punch arm in rear of its axis and adapted to engage a rearwardly facing stop 4i on the rear part ofthe base. For the purpose of enabling the punch arm to normal extent to facilitate sharpening of the die plate disassembling of the parts ofthe notching apparatus for this purpose. means areprovided for conveniently detaching the stop 4i from the base. The preferred form of the means for accomplishing this purpose shown in Figs. 1, 4 and 5 comprise a stop block 42 arranged in the recess 22 of the base'and having-the stop 4I on its rear side while its front side engages with the inner end of the recess 22. tachably connected with the base by means of a screw I5 arranged below the path of the stop lug 4 3 on the punch arm.

' When the notching apparatus is not in use the punch arm is elevated by the spring 33 and the punch stop 43 engages with the base stop 40 and arrests the upward movement of the punch ann into a position in which a gap is formed between the die plate and punch blade for the reception of the workpiece which is to be notched. As shown by dottedlines in Fig.. 1, this workpiece is represented as an angle iron which has one flange l1 resting horizontally on .the die plate gage surface be turned upwardly an ab- This stop block is de- 43 formed by the `front side of the bearing lugsv 24 immediately above the recesses 25 thereon while the other flange I6 is arranged vertically immediately in front of the punch blade. Upon depressing the/punch arm by means of a press ram-or otherwise the blade of the punch will press downwardly on the respective flange of the angle' iron and, by cooperation with the cutting edges of the notch on the die plate, will cause a slug to be cut or sheared out of the works piece and a yV -notch formed in the same.

This form of notching apparatus is particularly desirable forcutting notches in the flanges of angle irons close to the inner corners of the same and thus permit using such notched angle iron advantageously for certain installations. An example iron would be to provide the respective flanges of the same with a pair of notches which are transversely in line, as shown at the left of Fig. 7. An angle iron thus notched would leave a small web 44 on the respective flanges between the inner ends of the corresponding notches which web can be easily bent for bringing adjacent sections of the angle iron linto an angular position relative to each other and thus form a frame binding or the like in which the several sections are integrally connected.' This is of importance to hold the two mitered edges together for welding.

When it is desired to sharpen the cutting edges of the die plate and punch arm the stop block 42x is detached from the base after removing the screw I5. The punch arm can now be swung from its normally horizontal position, shown by full lines in Fig. 4,'to a retracted verticalposltion, shown by dotted lines in the same figure. thereby fully exposing the upper side of the die plate and the underside of the punch blade and 40 permitting of conveniently grinding these sides and the punch arm without requiring undue Y ing the punch blade or surfaces by means of the usual grinding apparatus employed for this purpose without requiring disassembling of other parts of this notching apparatus.

The form of notching apparatus shown in Figs. 8. 9 and 10 is more particularly designed for cutting U-shaped notches 43 in the ends of tubes 46 which may be either of rectangular form in cross section, as shown in Fig. 11, or of other desired forms but this apparatus may also be used for cutting other shapes of' notches in tubes and in other articles. The construction of this notching apparatusis substantially the same Aas that shown in Figs. 1-6.

7 the chief differences consisting in providing the base 20 with perforated ears 41 on its laterally opposite sides for the reception of bolts or screws whereby the same may be attached to the bed of a press or other support, also extending the slug discharge chute 43 from plate to the front of the base, and also construct- 49 in theform of a narrow nose which is adapted to receive the end of a tube and cutone or more U-shaped notches 48 into the same. The stop 50 on the punch arm is also made in the form of a shoulder which faces downwardly from the punch arm in rear of its axis,

spects the two forms of this invention are alike of thus advantageously notching an angle y the underside of the die land the hub of the punch arm has a concentric with a correspcnd- 4stop of said punch arm for and the description ofthe construction shown in Figs. l-T is therefore applicable to the construction shown in Figs. 8. 9 and 10.

I claim as my invention: l l. A notching apparatus) comprising a base provided onv its rear part with upwardly projecting lugs, a die plate mounted on lthe front part .of

cutting notch, a punch arm larranged between said lugs and pivoted thereto and providedA in cutter blade without removing the cutter armA and its blade from said lugs. y

2. A notching apparatus comprising a base provided on its rear part Vwith upwardly projecting lugs, a `die plate mounted on the front part ofA said base and provided in its rear edge with a cutting notch. a punch arm arranged between said lugs and pivoted thereto and provided in front o f its axis with a cutter blade adapted to cooperate with the cutting notch of said die plate l and also provided in rear of its axis with a stop, a stop block arranged between said lugs` and detachably connected with said base and provided with a stop adapted to'be engaged by the stop of said punch arm for limiting the separation of said vided on its rear part with a rearwardly` opening t recess and two .upwardly projecting bearing lugs said b ase and provided in its' rear edge with a front of its axis with a cutter blade adapted-to A.and provided on opposite sides of said recess, a'die plate secured to the upper side of the front partof said -base'and provided with a cutting notcina vertipunch arm having its rear part.

ally swinging v arranged between said lugs and pivotedthereto on its front part with a cutting blade adapted notch. a stop punch arm 'in rear of its axis,=.a stop block-arranged in said rear recess and having a reari wardly facing st op adapted to be engaged by the arm and plate. and a lifting spring engaging its j upper end with the underside of said punch arm in front of its axis and resting at its lower end on'said base between said die plate and said stop block.

3. A notching apparatus comprising a base, a die plate mounted on said base and provided on its rear side with a notch having a cutting edge. and a vertically swinging punch arm pivotedat its rear end on the rear part of said base and providedon its front end with a' cutter blade having cutting edges on its opposite sides adapted Y to cooperate with the cutting edges of said notch for producing notches in a workpiece, land also A is controlled so as having its frontend curved concentrically with the axis of said punch arm.

4. A notching apparatus comprising a base provided` with a slug discharge chute and two bearing lugs rising fromthe rear part of the base on opposite sides of said chute and provided with recesses on their front sides, a die plate mounted on said base ,and provided on its rear side with a notch having a cutting edge and engaging'its rear side with the recesses in said lugs, screwsv connecting said plate with said base, a vertically swinging punch arm having its rear'part arranged between said bearing lugs and pivoted thereto and provided on its front. part with a cutter blade,

' the opposite cutting edges of which are adapted to cooperate with the cutting edge-of said notch for producing notches in a workpiece, a spring for yieldingly holding said arm in an elevated position, `a stop projecting downwardly from the punch arm in rear-'of its axis, and a rearwardly facing stop arranged on the rear side of said base and adapted to be engaged by the downwardly projecting stop on said arm.

i. 5. A notching apparatus comprising a base pro- 'stop on the punch arm. and connecting said stop block with said/base.

6. A notching apparatus comprising a base, a dieplate mounted on the front part of said base and provided on its rear ing cutting edges, anda punch arm pivoted at its rearend on the base and provided on the under- Screw detachably side oi' its `front part with cutting edges adapted to engage with the cutting edges of said notch and the frontend of said arm being curved concentrically with the axis of the same.

7.- In a notching apparatus having a' base, a die member supported by said base and having a pattern cutting edge extending ffrom the rear edge orward into said die member, a reciprocating punch member having a cutting edge of`corresponding pattern fulcrumed on said base, a

stop tol limit the movement of the punch member,

stop being removable to enable said punch cutting edge to be away from said die member. said swung to a position for increasingthe spacing yletween said punch and the cutting edge of said ie. I

8. A notching unit. comprising a base, a die mounted on the base, a punch mounted directly on the base and movable toward and from the die, and means whereby the stroke of the punch to render the same relatively short during normal operation of the punch and to increase the extent of movement of the punch away from the die to facilitate sharpeningofthe punch without dismounting the same from the base.

9. In a notching apparatus having a base, a die I member supported by said base, a-cooperating punch member fulcrumed on-said base, a resilient device for retaining said punchmember yieldingly in elevated inoperative position above said die member, means to enable said punch to be further spaced from said die cutting edge to provide increased space for grinding the top face of said die member and the 4cooperating face of said punch member without detaching the punch from the base.

f A ing said punch member so 10. In a notching apparatus having a base, a die member supported by said basel a, punch member fulcrumed on said base, means for guid- Bs to engage and disengage its cutting edge with the cutting edge of said die member including upwardly projecting lugs on said base spaced apart to accommodate and a fulcrum pin extending to cooperate with said cutting projecting downwardly from the edge with a notch havmember and' lugs, said lugs l. and engaging said die memwithout removal of the same 12. In a notching apparatus having abase, a die member supported by said base, a cooperating punch member i'ulcrumed directly on said base, and control means for controlling the extent ot the gap between said punch and die members to permit grinding of either member without removal oi the same from said base including the release of said gap control means.

13. In a notching apparatus havingy a base, a

.4 f v v 2,363,630

die member supported by said base, acooperating punch member fulcrumed directly on said base. and control means for controlling the extent 0l' the gap between said punch and die members to permit grinding of either member without removal of the same from said base including the removal of said gap control means which is normally in the space under said fulcrum.

, GEORGE F. WALES.