US2286513A - Inside flash remover - Google Patents

Description

June 16,1942. Q W, WER f y 2,286,513

INS IDE FLASH REMOVER June 16, 1942. G. w. sowER K INSIDE FLASH REMOVER 5 SheetsSheet 3 Filed Dec. 5, 1940 NEL `GEO/EGE w son/Efe Agro/g/VEYS Patented June 126, 1942 INSIDE FLASH REMovER George W. Sower, .University Heights, Chio, as-

signor to Republic Steel Corporation, Cleveland, Ohio, a corporation of New Jersey Application December 5, 1940, Serial No. 368,657

5 Claims.

This invention relates to apparatus for remov-I ing a flash or burr from welded pipe or tubing I and more particularly to an improved inside flash remover or continuously severing the inside burr from pipe or tubing which is Vformed from flat scelp and continuously welded in long lengths.

In the Welding of pipe or tubing by the continnous electrical process and in certain other procedures, a burr is thrown up at the weld both inside and outside of the tube. The removal of the inside burr is necessary for certain uses of the product and numerous devices have been prolposed for continuously severing this burr as the tube emerges from the welding apparatus. It is among the objects of my present invention to` provide an improved inside flash remover which can be accurately adjusted to take just the de-I sired cut from the inside of the tube and which will maintain a uniform cutting action regardless of' minor variations in the inside diameter of the .tube or in the burr itself. Other objects of the present invention include:

The provision of an inside flash remover which will maintain its adjustment during long yperiods of operation; the provision of a flash cutter in which resilient means are. effectively-employed to maintain the tool in proper cutting relation to the burr and to the inside of the tube; and the provision of an inside flash cutter of simple and rugged form which may be economically manufactured and maintained.

The above and other objects of my invention will appear from the following description of several embodiments thereof, reference ybeing had to the accompanying drawings in which:

Figure 1 is a detached plan View of my improved flash remover in operating position in a tube; the tube being shown ,in cross section.

Figure 2 is a vertical longitudinal sectional view taken on line 2 2 of Figure 1.

Figure 3 is a transverse cross sectional View taken on line 3-3 of Figure 2.

1 but illustrating a third embodiment of my in.

vention.

Figure 10 is a vertical longitudinal sectional view taken on line III-I0 of Figure 9.

Figure 11 is a transverse cross sectional viewtaken on line II-II of Figure 10, and,

Figure 12 is a transverse cross sectional view taken on line I2--I 2 of Figure 10.

Referring to Figure 1 the main frame or body I of my improved flash cutter is attached to the end f a bar or rod 2 by means of a pin 3. This rod 2 extends through the tube T to a point ahead of the weld, and is there anchored in any suitable and well-known manner. Thus the frame I of the flash cutter is held in position in the tube which moves, relative ,to the flash cutter, in the direction of the arrow (Figure 1) during -operation.

A vertical slot roll 5 which is freely rotatable on the transverse shaft 6 which in turn is rigidly sup-ported in the body I. A second top roll 'l is similarly mounted on a shaft 8 in a-vertical slot 9. Itwill be noted that the top rolls 5 and 1 are grooved so that Figure 4 is a transverse cross sectional view taken on line 4-4 of Figure 2.

they will straddle the vburr B and engage the surface of the top portion of the tube on each side of the burr and that their tube engaging surfaces are disposed above the top of the body I so that they hold the body of the flash cutter out of contact with the tube Wall.

A bottom roll 9 is mounted on a shaft I0 which in turn is carried by a floating yoke member II having spaced arms II and II" having a sliding fit within the slot 9 in the body. The shaft 8 passes through the arms II' and II and forms a pivotal support for the yoke I I which is notched at i2 to accommodate the end of the bar spring member I3. The opposite end of the spring I3 is secured in a spring holder I4 which, in order i to facilitate assembly of the unit, is preferably a separate piece which is inserted into a slot, in

the frame I, and then Welded in place as indi- `will force the shoulder 23 on tool I6 against the shoulder 24 on the frame and thus the tool will be locked firmly in position. A slot4 24 in the 4 in the body I houses the top frame provides an exit for the severed burr which is seen at 25 n Figure 2, and it will be noted that the cutting edge I9 of the tool is disposed closely adjacent the point of contact of the top roll 1 with the tube surface.

A guiding roll 26 is mounted on a vertical shaft 21 behind the tool holding portion of the device and, serves to prevent undesirable side sway and to maintain the frame andl tool properly centered in the tube;

In the operation of the above described device the heavy stiff spring- I3 is so formed and located that, when the unit is not in cutting position in a tube, the top rolls 5 and 1 and the bottom rollv 9 will be spaced apart a greater distance than the inside diameter of the tube in which the device is to be used. When the apparatus is inserted into a tube the spring I3 is iiexed upwardly, and the yoke II swings around the supporting shaft 8 in clockwise direction. Thus the bot- -tom roll is caused to exert a continuous and substantial force downwardly against the bottom of the tube. 'Ihis force has a. corresponding upward reaction supporting the frame I with the top rolls 5 and 1 firmly engaging the top of the tube adjacent the burr. As the cutting edge I9 of the tool is close to the point of contact of the roll 1 with the tube its depth of cut will be limited and maintained uniform by this roll.

By employing a relatively stiff heavy bar spring the desired resiliency is obtained while, at the same time, the cutting edge I9 is always held at exactly the right location to produce a uniform cut regardless of minor variations in the form of the tube.

In Figures 6, 7' and 8 a modied form of my flash cutter in which the body or frame 28 is held in positionin the tube by a bar 29. The top rolls 30 and 3| are spaced longitudinally on the frame 28 and are mounted on shafts 32 and 33 which in turn are rigidly supported inthe body 28. Suitable slots 34 and 35 are formed inthe body to accommodate the rolls 30 and 3| respectively. A

-elongated flat spring bars 42 and 43, are provided to exert a force on the shafts 38- and 39 tending to move the shafts andbottom rolls downwardly away from the frame 28. Each of the spring bars 4,2 and 43 is latched under an angle l lug member 44. at one end and under a remov' able pin 45 at the other end, the ends of the spring bars being suitably out away, as seen at 46 in Figure 7, to engage properly the lug and pin. Additional retaining flanges 41 are provided on the sidesof the body 28 to retain the spring bars 42 and 43 in position, and the ends of the shafts 38 and 39 are notched as seen at 48 (Figure 8) to accommodate the spring bars.

These bars areso formed and so supported that, when the flash cutter is removed from a tube, the spring bars tend to move the rolls 36 and 31 away from the frame 28. When the device is in operating position in a tube the spring bars are exed upwardly, thus causing a force to be exerted between the body 28 and the bottom rolls 36 and 31 which firmly holds the top rolls 30 and 3| in engagement with the top of the tube. The top rolls 30 and 3| are grooved straddle the seam in the manner described previously in referring to Figure 1.

Just beyond the top roll 3| in the direction of tube movement a transverse baille wall 48 ex. tends across the slot in the body 28 and, together with the tool holding portion 56, defines av guide chute for the severed ash 5|. The cutting edge `52 of the tool 5 3 is' disposed closely adjacent to the point of contact of the roll 3| with the top inner surface of the tube andthus an accurate gauge is provided for determining the out taken by thev tool. An adjusting screw 64, provided with a lock nut 55, is adapted t0 locate thetool 53 on the .inclined surface 66 of the tool support and a clamp screw 51 retains the tool in any desired adjusted` position. As seen inFigure 6, the screw 51 passes through an elongated slot 58 in the tool 53, and thus the desired'degree of adjustment of the tool is permitted. The lat`- eral guide roll `59 is mounted on a suitable vertistruction which effectively achieves the desired.

results within the limited space available.V

In Figures 9, `10, 11 and 12 a third modification of my invention is illustrated in which a grooved top roll 60 and an ungrooved top roll 6| engage the upper inner surface of the tube respectively ahead of and behind the tool 62. These rolls are mounted on shafts 63 and 64 which are non.

yieldingly carried in the frame 65. A recess 66 extends upwardly from the bottom of the frame 65 and houses the bottom roll 61 which is rotatively mounted in a pivoted roll supporting bracket 68. The transverse shaft 69 carries the bracket 68 and the forward end of the bracket 66 is apertured atv10 to fit loosely over a stud Il having an enlarged head 12 and which is threaded into the body 65. A compression spring 13 is disposed around the stud 1| and exerts a force tending to lift the forward end of the bracket and to move the roll 61 downwardly. A screw stop 14, provided with a lock nut 15, regulates the degree of downward movement which may be imparted to the roll 61 by the action of the spring 13, and it will beobserved that, when the apparatus is in use in a tube of proper diameter, the roll 61 will be urged downwardly against the bottom of the tube bythe spring 13, and the frame 65 and top rolls -60 and v6| will be held up with the top rolls firmly engaging the upper inner surface of the tube. The tool 62 is closely adjacent the top roll 6I and therefore the cut taken by the tool 62 is regulated by the relative positions of the cutting edge of the tool and the point of engagement of the roll 6| with the tube wall in themanner previously described.

Adjustment for the tool 62 is provided by a ro-l tatable member 16 having an eccentric portion 11 against which the bottom of the tool 62 rests. A set screw 18 is adapted to clamp the tool in any adjusted position and, by loosening this screw 18 d and turning the adjusting member 16 by means of its square head portion 1 6', the tool can be raised or lowered and then reclamped in position.

The severed flash 19 passes down through the slot 8|) in a manner generally the same as in the other forms of my flash cutter device and a lateral guide roll 8| ismounted on a vertical shaft 82 behind the top roll 6|. I

In all of the illustrated embodiments of my invention a rigidly xed cutting tool having a single cutting edge is disposed closely adjacent to a roll rotatable on an axis which is fixed relative to the tool and which engages the inner top surface of the tube. The entire body of each device, together wih the tool and the fixed axis top rolls, is spring 4supported and resiliently held .up toward the top of the tube by a roll or rolls which engage the'bottom of the tube. With my arrangements of floating bottom rolls and spring mounts very compact and ruggedstru-ctures are obtained which may be employed in relatively small diameter tubes and which have proved in actual use to be entirely satisfactory and to produce a uniformity of inside flash removal which has not been obtainable with devices previously employed.

Although I have described the illustrated embodiments of my invention in considerable detail, it will be understood by those skilled in the art that variations and modifications may be made in the specific form and arrangement of parts herein shown and described without departing from the spirit of my invention. I donot, therefore, wish to be limited to the particular devices illustrated herein but desire to claim all forms;A of my invention coming within the scope of the y appended claims.

' I claim:

1. In an inside flash remover of the type described, a frame, a pair'of longitudinally spaced top rolls supported on axes rigidly carried by said frame, a cutting tool rigidly positioned in said frame and having a cutting edge disposed adjacent one of said top rolls, means for adjusting the position of the cutting edge of said tool relative to the point of contact of said one of said top rolls with the surface of the tube, a bottom roll between said top rolls, iioating support means for said botlom roll whereby limited movement of said bottom roll relative1 to said frame may be had, and spring means tending to for said bottom roll whereby limited movement of said bottom roll relative to said frame may be had, a fiat bar spring having one end engaging said frame and engaging said bottom roll support means at a point removed from said one end, said spring being adapted to urge said top rolls against the inner wall of a tubular article adjacent the flash and said bottom roll in the opposite direction against `the opposite portion 'of the tube wall when the frame is positioned in the tubular article.

3. An inside fiash remover for severing flash from a tubular article including, a frame, a pair of longitudinally spaced top rolls supported by said frame wih theirvaxes fixed against other than rotative movement relative to said frame, a cutting tool rigidly mounted on said frame and having a fixed flash cutting edge disposed adja cent one of said top rolls, a pair of bottom rolls disposed in a slot in said frame between said top rolls, shafts for said bottom rolls, the ends of each of said shafts extending beyond said frame on each side thereof and said shafts being supported in elongated slots in said frame whereby limited vertical movement of said shafts relative to said frame may be had, av pair of elongated at spring bars disposed one on each side of said frame, and spring. bar retaining means carried lby said frame and engaging said spring bars adjacent their ends, said bars engaging the extended ends of said shafts whereby said bottom rolls are urged away from said top rolls when said body is in operating position in a tubular article from which `the flash is to be removed.

4. In apparatus of the type described, a frame, longitudinally spaced top rolls carried by said frame, a fixed cutting tool carried by said frame and having a flash cutting edge adjacent ne of said top rolls, a bottom roll between said top move said bottom roll 'in one direction transversely of the tube and to move said frame and top rolls in the opposite direction.

2. In an inside ash remover for tubular articles, a frame, a pair of longitudinally spaced top rolls rotatably supported by said frame with their axes fixed against other than rotative movement relative to said frame, a cutting tool rigidly mounted on said frame and having a flash cutting edge disposed adjacent one of said top rolls,

means for adjusting the position of said cutting edge ,relative to said one of said top rolls, a bottom roll between said top rolls, support means and spring meansbetween said bracket and said rolls, a shaft for said bottom roll, said frame-y having verl'ically extending slots in which the ends of said shaft are disposed, and a longitudinally extending spring bar member engaging said shaft at a point between its ends and being supg ported at its ends by said frame.

5. In an inside ash remover for tubular articles, a frame, a pair of longitudinally spaced rolls carried .by said frame, a,xed cutting tool carried by said frame adjacent one of said top rolls, 'a roll supporting bracket pivotally supported on said frame, a floating roll carried by said bracket onthe opposite side .of said frame from said-pair of rolls and between said top rolls,

frame and tending to urge said floating roll away from said frame when said frame is in operating position in a tubular article.

GEORGE W. SOWER.

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