US1906358A

US1906358A - Apparatus for skiving

Info

Publication number: US1906358A
Application number: US441594A
Authority: US
Inventors: Ethan A Bedell
Original assignee: BF Goodrich Corp
Current assignee: Goodrich Corp
Priority date: 1930-04-04
Filing date: 1930-04-04
Publication date: 1933-05-02
Anticipated expiration: 1950-05-02

Description

May 2, 1933. E. .A. BEDELL APPARATUS FOR SKIVING Filed April 4, 1930 2 Sheets-Sheet l 5 v/ T J RE I FE T n n Qk E mw y 2, .1933- E. A. BEDELL 1,906,358

' APPARATUS FOR SKIVING Filed April 4, 1930 2 Sheets-Sheet 2 h\ M l l l. l l l l I l 1 1 N W 1 m QM 3" I l I I l I I l l 1 Q W.

Patented May 2, 1933 UNETEB' srAres Parent earlier];

ETHAN. A. BEDELL, or nvnnsron, rtnrnois, ASSIGNOR T minis. F; eo'onliiron COMPANY, OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK APPARATUS son sKIvIne Application filed. April 4,

This invention relates to apparatus for skiving, and more especially to apparatus for skiving or beveling the ends of flat sheet or strip material.

The invention is especially useful for skiving the respective ends of belting preparatory to splicing said ends to produce an endless belt, uniformity of the respective skives being essential for producing a finished belt of'uniformthickness and flexibility.

The chief objects of the invention are to effect uniformity of respective skives; to provide a simple and compact skiving apparatus; to provide for readily altering the angle of skive; and to provide apparatus for the purpose mentioned which will accommodate WOlk of a substantial range of thicknesses.

Of the accompanying drawings:

Fig. 1 is a plan view of my improved apparatus in its preferred form, and the work therein, parts being broken away and sectioned. I r Fig. 2 is a section on line 22 of Fig. 1. Fig. 3 is a section on line 33 of Fig. 2. Fig 1 is a. perspective view of the end portions of a belt skived in my improved ap paratus, as they appear preparatory to splic- 1H0. v e

Tleferring to the drawings, 10 is a relative ly low open framework having respective side walls 11, 11, and end walls 12, 13, the end wall 13 being at the front of the apparatus (the left as viewed in Figs. 1 and 2) and dis posed somewhat inwardfrom the end thereof. A flat-top table or platen 14 is mounted within the framework 10 and is hinged at 15, 15 to the respective side walls 11 thereof adjacent their rear ends. The bottom of the table 14 is formed with longitudinal and transverse stiffening webs 16, 17 respectively, and the two transverse webs 17 at the front end of the table are centrally formed with bearings for a threaded shaft or screw 18 dis posed longitudinally of the table. The shaft 18 is extended beyond the front end of the table and provided thereat with a crank 19. A cross-head 20 in threaded engagement with the shaft 18 has its respective end portions formed with shoes, such as the shoe 21, Fig. 2, and said shoes rest slidably upon respective 1930. Serial no. 441,594.

ways 22, 22 formed as inwardly directed flanges upon the lower margins of the side walls 11 of the framework 10. The ways 22 are obliquely disposed with relation to the horizontal, the shaft 18 is obliquely disposed with relation to the plane'of the table 14:, and the shoes 21 have their sliding faces tapered. so as to rest fiat upon theways. The arrangement is such that angular movement of the shaft 18 advances or retracts the shoes 21 upon the ways 22 with the result that the front end of the table is raised orlowered and the top of the table thereby disposed at different angular positions with relation to the horizontal. The front end ofthe table isv formed with

flanges

23, 23 which extend laterally from its opposite sides past the ends of the side walls 11, and at least one of said flanges is formed with an openend slot' 24: (Fig. 1) which embraces a bolt 25 threaded into'the end of the side wall 11. Thebolt 25 may be set up against the flange 23 to secure the table after it has been tion of the shaft 18. I

I The table 14 is adapted to support the work, herein shown as one end portion of a length of belting 26, upon its upper surface, and the work is held in fixed position thereon by a roller cam 27 which spans the table top adjacent the front end thereof. The cam 27 is secured upon a shaft 28which is journaled at its respective ends in

bearing brackets

29, 29 mounted upon the side walls 11 of the framework 10,0ne end of said shaft 28 being provided with a lever 30 by which the shaft is angularly turned. The operative range or throw of the cam 27 is such that it will engage work of any thickness desired,at all angular positions of the table 1 1. The top of the table 14 beneath the cam is roughened or scored as at 31 to assist the cam in holding the work against movementlengthwise of the table;

The end of the belt 26 is skived by moving awknife or blade in a horizontal course 95 through the belt, while thelatter isobliquely positioned in the path of the blade. vThe blade 32 is mounted upon the bottom of a movable carriage 33, its cutting edge being directed t ward. the r ar of-the app ra positioned by rota and the blade is inclined somewhat downwardly so as to stand oblique to its path of travel and thereby to obviate some friction with the work during the skiving operation.

The carriage 33 is supported, above the table 14, by

slideblocks

34, 34 to which its respective ends are secured, said slide-blocks being mounted in respective

horizontal slideways

35, 35 formed in opposite side walls 11 of the framework 10: For concurrently moving the slide-blocks 34 longitudinally of the apparatus,

screws

36, 36 are threaded through the respective slide-blocks and are j ournaled in suitable bearings formed in the end wall 13 of the framework. The end portions of the screws extend beyond said bearings and are provided thereat with respective bevel gears '37, 37 meshed with

bevel gears

38, 38. mounted upon a shaft 39, the latter being journaled' transversely of the apparatus in bearing brackets 40,,402iiormed on the end wall 13; 7 One end of the shaft 39 is provided with a crank 41 bywhicli the shaft is rotated to-turn. the screws 36 in. unison.

Extending rearwardly from each slidebloucko34 in] an arm 42% and pivotally supported from: said arms is a: hold-down structure adapted yiel-dingly to bear upon the work immediately in advance of the blade 32 to hold thework fiat upon the table. The holddown stmioture-consists of: an open rectangular'frame 43'journa'led upon pivots 4'4, 4 4, at two; of its eorners,.to the armsl42. 'l hat side of the frame 43; which spans the table 14 adjacent the work is: offset from the plane of the; frame and is obliquely disposed with relation; to the table 14 so as to move over the work thereonwith-awiping action. 3 Tension springs 45, 45 connect the end members 01 the frame 43 to;

respective studs

46, 46 on the carriage 33', with the result that the side-member which engagesthe work is yieldmgly urged thereagainst. The side of the frame opposite the work=engaging side serves to. equalize the effect of the springs 45' and: also serves as-aconvenient place for grasping the frame to tilt it, against the tension of the springs 45, to: raise its workengaging side from the work.

Intheoperat-ion of'the'apparatus, the carr age 33 initially isi'n'. inoperative position, at. the left as viewed in'Figs. 1 and 2, and

the; cam27.'is in. raised position. The end portion of the belt 26 is passed under thecama27' andlaid' flat uponthe-table, substantia-llyto the rearend' thereof, and then the angle of the table is: adjusted,.by turning the crank 19, to determine the length and angle of the: skiveQ The bolt 25.is then tightened to holdrthe table seeurelyin adjusted position and the lever 30 is manipulated tocause the cam 27 to wedge the work against the table 14. The crank 41 is thenturned-to cause thescrews 36 to feedthe carriage 33 toward the rear of? the apparatus, whereby. the;

is forced through the belting 26 which is obliquely disposed in the blades path of travel. The finished work is illustrated in Fig. 4, the skives being designated 47.

The machine is small, compact, and efficient. It is readily portable, and in use may be mounted upon a bench or table. When adjusted for a particular belt it will effect skives of uniform length and angle so that the belt-ends may be spliced to produce an endless structure of uniform thickness and flexibility.

The invention is susceptible of modification within the scope of the appended claims.

I claim:

1'. A skiving machine comprising, in combination, abase-,a work supporting table pivoted to said base, means for supporting. the table at a determinately variable. angle relative to saidibase, a cutter'carriage reciprocable in a fixed course relative to said base, and a work pressing structure pivoted to said carriage and. having a work contacting foot extending downwardly from the pivot and a manipulating arm extending upwardly'therefron'n 2; Askivingapparatus comprising,in combination, a base, a cutter reciprocable in a iixedl course relative to sa'i'd base a work supporting table pivoted to said base and means comprisinga wedge member movable relative to the base and table along a. cam surface therebetweenv for adjusting, the relative angularity thereof.

3. A. skiving apparatuscomprising, in combination a base having a: cam! surface, a cut ter reciprocable in a fixed course relative to saith base, a work supportingtable pivoted to saidi base,.a wedge member reciprocable a-long said' cam: surface between said base and table for varying the relative angularity of thebase: and table, and means con'lprising a screw rotatably mounted in said table and engaging said wedge member for adjusting thepositionz of the latter along said cam. surface.

I211 witness whereof I have hereunto set, my hand this 2nd v day of April, 1930.

ETHAN A. B'EDELL.