US2005325A

US2005325A - Rolling millwork measuring

Info

Publication number: US2005325A
Application number: US690467A
Authority: US
Inventors: Rolland E Peterson
Original assignee: American Sheet and Tin Plate Co
Current assignee: American Sheet and Tin Plate Co
Priority date: 1933-09-21
Filing date: 1933-09-21
Publication date: 1935-06-18
Anticipated expiration: 1952-06-18

Description

J1me 1935- R. E. PETERSON ROLLING MIIJLWORK MEASURING Filed sept. 21, 193:5

5 Shets-Sheet 1 N ii I Q m m k [Mei e607":

EOLLQND E. PETERSON,

June 18, 1935. R. E. PETERSCDN- I 2,005,325

ROLLING MILLWORK MEASURING Filed Sept. 21, 1933 :s Sheets-Sheet 2 -fioLzQq/ vo E. PETERSON,

i4? fifarneya.

bwenior:

June 18, 1935. R. E. PETERSON I 2,005,325

ROLLING MILLWORK MEASURING C Filed Sept. 21, 1933 5 Sheets-Sheet 3 lawazzlom EOLLHND E. Psfesoxv, 2

Patented June 18, 1935 UNITED STATES PATENT oFFicE American Sheet and Tin Plate Company, a

corporation of New Jersey Application September 21, 1933, Serial No. 690,467

4 Claim.

This invention is a device intended for use with a rolling mill to measure the work'so that the roller may properly regulate his pressures and number his passes to produce desired 5 lengths. It is particularly intended to be used with a sheet or tin plate mill provided with an automatic catcher table.

Referring to the drawings:

Figure l is a dia rammatic side elevation of an example of the invention used with a hot mill.

Figure 2 is a top plan of Figure 1.

Figure 3 is an enlarged side elevation of a detail in Figure l. v

. Figure '4 is a cross-section from the line IVIVinFigure3.

Figure 5 is an enlarged side elevation of another detail from Figure 1.

' Figure 6 is a cross-section from VI-VI in Figure 3.

A stand of hot rolls I is provided with roller and catcher tables 2' and 3. These tables are the type which automatically pass sheet packs through the pass of the stand and return them over the top roll.

In the present instance pinch-rolls 4 and 5 are carried by the catcher table 3 and receive the work coming from the roll stand I. These pinch-rolls comprise coacting double disks and are driven at the same speed that the catcher table carries the work. This may conveniently be accomplished by fixing the lower roll 5 to the sprocket shaft of the catcher table. It is assumed that this table includes endless carrying chains mounted and driven by sprockets whose rotative directions are reversed during the return of the work.

The upper pinch-roll 4 is mounted on the a catcher table by a bracket 6 pivotally carried by a pairoi upstanding arms I. This bracket 8 also mounts a frame 1 carrying mechanism driven by the upper pinch-roll 4 for converting the latters revolutions into linear measurements.

This mechanism includes a shaft 8 connected to the upper pinch-roll 4 by sprockets 9 and I and chain II. The sprocket 9 is loosely mounted on the shaft 8 and the drive is eflected by the mutual contact of pins l2 and I 3, the former projecting from this sprocket and the latter from an arm i 4 fixed to the shaft 8.

The shaft 8 carries a pinion l meshed with a gear l6 mounted for free rotation on a shaft II. This shaft carries a brake drum l8 driven the line 80 by the gear it through a friction clutch iii. The drum i8 is fixed to the shaft I! to drive it.

A. brake shoe 20 is carried by a toggle-arm 2| and constantly urged into contact with the brake drum I 8 by a spring 22. This toggle-arm B is constructed to hold the shoe 20 against the drum I. so that the latter is locked from rotation in an anti-clockwise direction but can rotate in a clockwise direction. When the pinchroll 4 turns in a work receiving direction the 10 drum I8 is urged in an anti-clockwise direction. The shoe 20 prevents this while the trio-- tion clutch is allows slippage. When work is discharged i'romnthe catcher table the pinch-roll 4 drives the drum iii in a clockwise direction, which is possible because the shoe will be released by the action of the toggle-arm 2|.

A bell-crank 21 raises the toggle-arm 2| to release the shoe 20. The short arm of this bellcrank contacts the under side of the toggle-arm 20 2| so that the latter is free to rise when urged to do so'by the clockwise rotation of the drum l8.

' The bell-crank 23 is operated through a connecting-rod 24 by a trigger 25. This trigger is located in the pass of the pinch-rolls 4' and 5 25 for operation by the passage of work. When work is being received by the catcher it throws the toggle-arm 2| to brake-disengaging position so that the drum i8 is, driven by the upper pinch-roll 4. This trigger rides on top of the work during its passage and drops when its end is reached. 'This immediately permits reapplication of the shoe 20 to the drum l8 so that the revolutions of the latter are stopped: A compression spring 25 may be applied to the rod 24 so that the trigger is normally urged to work-engaging position. I l

The shaft I! which turns with the drum i8 may be connected directly to a pointer and dial calibrated in suitable linear units. As this shaft 40 is driven by the pinch-roll 4 only during the actual contact of work, this pointer will read accurately.

Because the driving pinch-roll 4 is constantly rotating at the theoretical speed of the work coming from the hot rolls, due to its being frictionally driven by contact with the pinch-roll 5 which is itself driven by the catcher, there is little danger of a slippage error. The only parts which must be startedfrom a stationary position are the drum l8, shaft l1 and pointer of the dial, these all being relatively light so that their inertia is easily overcome without undue slippage of the clutch IS. The shaft l'l will not be rotated by the pinch-roll 4 until a sheet towards the frame I.

operates the trigger 25 so as to release the brake shoe 20 from the drum l8. Therefore, no error is caused by reason of the constant rotation of the pinch-roll 4.

The drawings show a telemetric transmitter element 25 arranged in circuit with receiver element 2'! which operates a pointer 28 over a dial 23. These telemetric transmitting and receiving elements may be of the Selsyn type, or any other suiting the designer's fancy. This telemetric system is illustrated instead of a pointer directly mounted on the shaft l1 because of the difficulty the mill operator will ordinarily have in obtaining a reading if the indicating instrument is on the catchers side of the mill.

The various elements described are reset to bring the pointer 23 to zero position by the return of the work through the pinch-rolls 4 and 5 to the roller table. During this movement the trigger 25 is oppositely moved. This is possible because the cranks short arm may freely leave the toggle-arm 3|. Reverse rotation -of .the drum I3 is also possible because of the toggle action of the brake 20.

Pins 33, 3| and 32 are carried by the frame I to extend towards the drum brake 18. The pin 33 slides in the frame 1 and may be withdrawn by a knob 30. It is preferably held in projecting and withdrawn positions by a spring urged plunger 30 which projects into suitably positioned notches in the .pin. These pins are spaced apart. I

The, drum I3 carries The

pins

30 and 33 are positioned at the same radial distance while the pin 3| I is positioned at a greater radial distance. A freely revoluble radial finger 34 encircles the shaft I1 and is of a sufficient length to engage the pins 3| and 32.

When the pointer of the indicating instrument is at zero the

pins

32 and 33 clasp the finger between them so that clockwise rotation of the drum I8 is positively prevented. When work passes onto the catcher table between the pinchrolls the drum l8 may revolve in an anti-clockwise direction until its carried pin 33 strikes the pin 30. When the work leaves the catcherthe drum l8 will revolve in a clockwise direction until the pin 33 brings the finger 34 against the shaft pin 32.

In case of long work the pin 30 is withdrawn by means of its knob 30. This permits the pin 33 carried by the drum I8 to pass this withdrawn pin, contact the opposite side of the finger 34 and bring the latter into engagement with the pin 3|. Dial resetting motion of the drum I8 then results in movement of the pin 33 back until it strikes the opposite face of the finger 34 and brings it against the pin 32.

The time required to return the pins l2 and I3, and the pin 33 provides ample time for the mill operator to observe the reading of the indicating instrument. It is, of course, impossible for the latter to leave its reading position until all the coacting pins interengage.

I The shaft I! may carry a pair of interconnected contacts 35 which cooperate with adjustable contactor segments 36. These segments 36 may be arranged in circuit with the drive of the catcher table so that the latter is not reversed when the circuit is closed by the interconnected contacts 35.

More specifically, this arrangement may be effected by mounting the interconnected contacts 35 on an insulating arm 31 fixed to roa pin 33 which extends tate with the shaft 11. The contactor segments 35 might be mounted on an insulating disk 33 rotatably carried by the frame I and operable by a knob 39 having a pointer 40 which reads on a dial 4|. Then by setting the pointer 40 so that the segments 35 will not be closed by the contacts 35 until the shaft H has been rotated to a position causing theindicating instrument to read the desired length, it is possible to effect automatic discharge of the work from the catcher table when this desired length is attained.

A summary of the operation involved is as follows:

The pinch-roll 5 is rotated by the catchers reversing driving mechanism at substantially the theoretical speed of work coming from the mill and ma receiving direction. Since the pinch-roll 4 is in frictional contact with the pinch-roll 5, it is also rotated at this theoretical speed and in a receiving direction. The shoe 20 at this time prevents rotation of the shaft l'l, due to its engagement with the drum I3.

As soon as work reaches the two pinch-rolls it trips the trigger 25 and so releases the shoe 20 from the drum l8. Simultaneously it takes up the job of rotating the already rotating pinchroll 4, the drive from the pinch-roll 5 being interrupted by the interposed work 4. The shaft I1 is now rotated by this latter pinch-roll and the trigger is riding the top of the work. As soon as the work leaves the pinch-rolls the trigger falls and permits reapplication of the shoe 2!! to the drum It so that rotation of the shaft I1 is immediately halted. It follows that the extent of the rotation of the shaft I] can be utilized to determine the length of the work passed by the pinch-rolls, as has previously been described.

As the catcher reverses to return the work over the mill the shaft i1 is reversely driven by the pinch-roll 4 contacting the pinch-roll 5, and this resets the length indicating pointer. This is delayed until the various pins oppositely reengage, this giving the roller time to see the pointer's reading. As soon as the catcher again starts to operate in its receiving direction, the pinch-roll 5 again starts to rotate the pinchroll 4 which causes the pins to reengage in their initial manner, and the apparatus is again ready to measure the work.

Although a specific form of this invention is shown and described in accordance with the patent statutes it is not intended that its scope be limited thereto, except as defined by the following claims.

I claim:

I. The combination of a roll stand, an elevating catcher table with reversibly operating conveyer means, constantly rotating pinch-rolls mountedat one end of said catcher table adjacent said roll stand, said pinch-rolls rotating in unison with and in the same direction as said conveyer means and means for remotely recording the rotation of pinch-rolls in one direction only.

2. Apparatus for measuring the length of moving work, including the combination of a revoluble element arranged for,.contact by said work, means for revolving said element at approximately the theoretical speed of said work prior to its being contacted by said work and measuring means responsive to the extent said element is revolved while it is being contacted by said work.

v3. Apparatus for measuring the length of gagement with the former, a rotative shaft; a

moving work, including the combination of a revoluble element arranged for contact by said work, a source of rotary power, means for connecting said source to revolve said element prior vto its being contacted by said work and for disconnecting it from said source when it is con- I tacted by said work, and measuring means re-- sponsive to the extent said element is revolved by its being contacted by said work.

4. The combination of a stand of not rolls, an automatic reversing catcher for said stand. pinch-rolls carried by said catcher so as to engage work handled by the latter. one of said pinch-rolls being rctatively driven by said catcher and the other being urged into frictional enfriction drive for rotatively connecting said shaft to said other of saidpinch-rolls, a brake constructed to normally hold said shaft stationary when said other of said pinch-rolls is revolving in a work-receiving direction, a work-operable trigger arranged between said pinch-rolls and associated with said brake so as to release the latter while work is passing between said pinchrol'l's, and length indicating means arranged in driven connection with said shaft, the last named means being constructed for resetting by reverse rotation of said shaft.

HOLLAND E. PE'I'ERSON.

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