US2166281A - Cylinder honing and wiping device - Google Patents

Description

July 18, 1939. G. BECK CYLINDER HONING AND WIPING DEVICE i Filed Dec. 6, 1937 v E mk m .u W e ?A y w w M ///MV/ e u a, a a 1 ay x J e A m IN Patented July 18, 1939 UNITED STATES PATENT OFFICE 9 Claims.

The object of this invention is to provide a novel form of device for subjecting a cylinder to an abrasive and wiping treatment.

In honing a cylinder with any of the various grades of emery, or any metal reducing abrasive, minute particles of the latter and of the cylinder metal collect on the cylinder wall and these particles must be removed as they are obviously objectionable. Only a gentle wiping action is effrcient in the performance of this function as a high pressure wiping action only serves to embed or anchor some of the particles in the wall, especially those of minute size.

It is a feature of this invention to provide a wiping means that will exercise a Very gentle wiping action, preferably in following relation to the hone, so that where a plurality of hones is employed, this wiping action will follow one hone and precede the next, thereby preventing the following hone from grinding in or embedding previously loosened particles.

It is a further feature to provide a holding means or holder for'the honing or emery bar that will also function to anchor a wiper so that the latter will function in close relation to the former.

A further feature consists in providing a resiliently sustained wiper of a suitable fabric having some absorbent Capacity, the wiper initially extending radially beyond the abrasive bar and flexing upon engagement with the cylinder wall so that as the bar wears down, additional areas of the wiper Will come into' effective service against the cylinder wall.

My invention is embodied in a centrally disposed propulsive mechanism adapted to rotate and also spread the abrasive bars against the cylinder wall, and by reason of the fact that my improved wipers are of the novel type set forth,

I can equip all the bar holders with abrasive bars thereby stabilizing the propulsive mechanism in self centered relation in the cylinder because of the uniform and equal pressure exerted on each of the bars.

The invention has many other ob-jects and features which will be more fully described in connection with the accompanying drawing and which will be more particularly pointed out in 50` and by the appended claims.

In the drawing:

Fig. 1 is a horizontal sectional view of Fig. 2, showing the device spread in a relatively large size cylinder.

55 Fig. 2 is a sectional View on line 2--2 of Fig. 1,

showing the 'device in a relatively small size cylinder.

Fig. 3 is an enlarged sectional View on line 3--3 of Fig. 2, showing an abrasive bar in its holder and the relation of the wiper thereto.

Fig. 4 is a sectional view of the wiper detached from the holder, taken on line 4--4 of Fig. 5.

Fig. 5 is a View in side elevation of the wiper with parts broken away.

Fig. 6 is a fragmentary View similar to Fig. 3, 10 showing a modified form of wiper. u Fig. '7 is a View in side elevation of one of the toggle or spreading bars.

Fig. 8 is an edge View showing how a spring held pivot pin may be shifted. 15

Fig. 9 is an end view of a modified form of spring sustainer for the wiper.

Like characters of reference designate similar parts throughout the different figures of the drawing. 20

As illustrated, l designates the cylinder wall in Fig. 1, and 2, the smaller diameter wall in Fig. 2, the different size cylinder showings being used to show the device in different adjustments, otherwise there are no other distinctions as the device 25 in both views is the same.

Reference will first be made to the propulsive and spreading mechanism.

A rotatively driven propulsive spindle is designated at 3 and may be connected upwith any 30 suitable source of power, not shown, for rotating and advancing the same in the cylinder, the usual direction of rotation being clockwise, as shown by the arrow in Fig. 1. The lower end of this driving spindle 3 is provided with four toggle 35 lugs 4, although more or less may be employed dependent upon the number of bar holclers desired. Cam or toggle bars are pivoted at their lower ends to said lugs and as all the bars are identical in form and function, only one need be 40 described in detail.

The toggle or cam actuating spreading bar is of U-shaped cross section, the web being indicated at 5 and the fianges at 6, and the free edges 'I of the latter are adapted for engagement with a cam to be presently described. The fianges 6 extend beyond the web 5 and form pivot lugs 8 at the lower end for spanning lug 4, and are pivoted thereto at 9. At the upper end, the flanges form lugs n for engagement with bar holders, to be presently described. A pivot pin I I is suitably fixed at !2 to the end of a strip spring I 3 that is secured by the pivot pin 9 to one side of the bar, as shown in Figs. 7 and 8. This affords means for quickly and easily changing bar holders.

Threaded on spindle 3 is a cam sleeve |5 having a cam !6, the latter engaging the toggle bars to spread the same when adjusted on spindle 3 in one direction, and serving to release said bars when adjusted in another direction, as will be clear from Fig. 2.

Reference will next be made to the improved abrasive bar holders.

Said holders are generally indicated at IT, and as all are identical in form` and function, only one need be described in detail. Reerring to Figs. 2' and 3, it will be seen that the holders which in effect are mounts have a channel form and are longitudinally divided into lateral sections of identical shape and size, the two sections being substantially coextensive in length with the honing bar which they grip. Each section has a base portion 18 and a slightly inwardly inclined bar grippng side portion !9, which jointly receive a honing bar 20, which has the form of a trapezum, the top and bottom faces being parallel and the side faces converging, although this precise shape is not important I will designate the upper face 2| as the honing or working face: of the bar, which may be of emery or any metal reducing abrasive.

Depending or extending from the bottom of the holder are lug` sections 22 of the shape shown in Fig. 2, and to which the upper ends of the toggle bars 5 are pivotally united by the spring held pivot pin ll, previously described. Due to this Construction the bar holders Il can tilt under spreading stress and automatically conform ,to the cylinder and render the mechanism self stable and self center-ing," as will later appear.

Reference will next be made to my improved wipers and to the manner in which they are connected with the bar holders just described.

Said wipers are formed from a strip of suitable fabric of a length substantially equal to'` the length of one of the bars 20, the strip being'folded transversely of its length to form a wiping bight 23, and side portions 24 and 25. The width of the strip is such that when the same is folded it will initially extend beyond the working face 2! of bar 20, that is, when secured in position, as shown in Fig. 3. It will thus be seen that I provide a double thickness wiper strip, and in practise I have very successfully used pool or billard table felt to form the wiper, as this material is not only absorbent but also thin and of great wearing efficiency, although other materials may be found of equal eiiiciency.

My improved wiper is resiliently sustained, as shown, by a spring which may be made from a strip of clock-spring steel, and I have successfully used steel of from one to two-thousandths gauge. A strip of this steel, substantially the size of the fabric strip, is folded upon itself to form, a bight 26 and sides or limbs 21, and the free marginal portions of the fabric and spring strips are disposed in juxtaposed relation when assembled. In the drawing I have exaggerated the thicknesses and also the bulge of the bight portions, merely for clearness of illustration.

In actual practice the bight in cross section is about one-eighth of an inch and the balance of the wiper merely totals the actual thickness of the felt and spring. In fact, and as will presently appear, it is not necessary, in the preferred form, to have a full rounded bight because the apex of the bight does not engage the cylinder wall when the wiper is proportioned to extend beyond the working face of the honing bar.

When the spring wiper is assembled With the spring fitting snugly within the wiper, the inner free marginal portions are disposed along side bar 20, as shown in Fig. 3, and the separate sections of the holder Il are pressed together causing the gripping walls !3 to grip the bar 20 and also` grip the free marginal portions of the wiper and spring against one side of the bar, and when the parts are thus disposed the sections of. the holder are "spot" or "butt" welded in permanent relation and as a unitary structure. Of course, it would be within the scope of the claims to employ screws or like means to compress and hold the sections but I employ welding as a more efficient method.

Now it will be clear that the major length, or rather height of the wiper, is free to bend and flex responsive to the thrust imposed by engagement with the wall of the cylinder, as will later be described.

In Fig. 6, I have shown the same form of holder and bar with the same reference numerals and the same type of wiper having a double thickness. However, the spring consists of a single thickness strip 28, the outer end 29 being curved over to form a spring bight supporting portion. The free marginal portions are gripped by wall IS in the same manner as in the preferred form. However, in the preferred form, as shown in Fig. 3, I can use spring steel that has been tempered, while in the form shown in Fig. 6, it is necessary to anneal the rounded portion 29.

I have shown in Fig. 9 a further modification of. the sustaining spring for the wiper which consists of a single thickness of spring steel 35 with a bight supporting portion 36, formed by bending the spring upon itself to form a fairly blunt end.

While the operation of the mechanism hereinbefore described may be clear from the foregoing it will be briefly recapitulated as follows:

In using the device in my own shop I first dip the same into a solution commonly known as a solvent, although the same may be water or any liquid effective for the purpose. This serves mainly to moisten the felt wipers so that they will the more effectively pick up the loose particles of emery and iron released by the honing bars. However, this also makes the honing bars act more elfectively.

The device is then contracted so that the holders IT may be inserted into the cylinder, whereupon the cam !6 is adjusted to spread the bars 20 into engagement with the cylinder wall. At this point I wish to state that heretolore one. of the holders l'l has carried a non-abrasive bar such for instance as graphite or like material capable of wiping action. It would of course bc impossible to equip a holder with a yielding wiper as that Would dislocate the equilibrium of pressure on the holders carrying honing bars. Further, if one holder was equipped with a nonabrasive bar the pressure on it, which would necessarily be equal to the pressure on the abrasive bars, would be so great that it would tend to bLu'y the emery and iron particles in the minute cavities of the cylinder wall instead of collecting such particles Thus the objection to equipping one holder with a collecting material will now be clear.

On the contrary, it will be seen that with the novel device of this invention I can equip each holder with a honing bar and thus render the mechanism self stable and self centering in the cylinder because of the uniform pressure on each bar, and in addition I can equip one or more holders With a wiper and thus provide for a wiping function without reducing the effioiency of the honing mechanism.

When the holders are expanded or spread, the wipers, if extended beyond the Working faces of the bars 20, are flexed, as indicated in Fig. 1. This separates the wiper from the honing bar which is a distinct advantage, because the wiper is then in a better position to pick up loosened particles of emery and iron. It will now be clear that wiping contact is slightly at one side of the apex of the wiper, and as the honing bar wears down, an additional area of the limb or side 24 will be brought into wiping play thereby making the wiping area extendible from an area near the bight apex toward the anchored portion of side 24. Hence, wiping contact will be gradually changed as the bar 20 wears down and therefore the life of the wiper will be extended so that it will be practically coextensive With the life of the bar 20.

In any event I achieve the great desideratum of a light pressure wiping contact in contradistinction to a heavy pressure wiping contact. With a light wiping contact the wiper not only lasts longer but I can employ an absorbent material such as felt that will be far more efficient in picking up the loosened particles than a hard dense material.

The form shown in Fig. 6, is equally eificient because its spring 28, like the spring in the preferred form, extends to the full radial height of the wiper so that in both constructions the springs not only act to sustain the wiper against fiexure transversely of the length of the strips, but the springs, in both constructions, serve to extend the wipers to their full height radially from the holders.

After a cylinder has been treated I have always dipped the device into a solvent so as to free the wipers from accumulations of grit which they have collected.

It is believed that my invention will be fully understood from the foregoing description, and I do not wish to be limited thereto except' for such limitations as the claims may import.

I claim:

1. In a cylinder honing and wiping device, means for holding a honing element, a resilient wiper carried by said means, and mechanism for advancing said means rotatively in a cylinder With said element and wiper in engagement with the cylinder wall, said wiper initially projecting radially beyond said element and being adapted to yield upon engagement with the cylinder wall and as said element wears down to bring new areas of said wiper into engagement with the cylinder wall.

2. In a cylinder honing and wiping device, means for holding a bar-like honing element, a fiexible strip-like wiper carried by said means and adapted to ex transversely of its length and being disposed in following relation to said element, and mechanism for rotatively advancing said means and holding said element and wiper in engagement with the cylinder Wall, said wiper initially extending beyond said element and flexing upon engagement with the cylinder wall dependent upon the extent to which said element wears.

3. In a rotary honing and wiping device for cylinders, a holder having a honing bar, a flexible wiper disposed in following relation to said bar with respect to the direction of rotation and comprising a length of fabric folded to form a double thickness strip with the bight thereof extending radially beyond the bar and a radially inner area of the strip facing the bar and forming an extendible wiping area dependent upon the extent .of flexure of said strip, a length of spring sheet steel folded to form a spring strip and disposed within said wiper strip to resiliently support the latter and the bight of said spring strip engaging the bight of said fabric strip, the free side margin of said fabric and spring strips remote from the bights thereof being gripped by said holder against said element leaving the remainder of said wiper free to fiex, and mechanism for rotating said holder with said bar and wiper engaging the Wall of said cylinder.

4. In. a rotary honing and wiping device for cylinders, a holder having a honing bar, a flexible wiper comprising a length of fabric folded to form a double thickness strip substantially coextensive in length with said bar and initially extending radially beyond said bar with the bight of said strip and a radially inner area thereof facing said bar and forming an extendible wiping area dependent upon the extent of flexure of said strip, a spring steel strip disposed within said wiper strip and having a rounded portion engaging the bight of said wiper strip and resiliently supporting the latter transversely of its length. the inner margins of said spring and wiper strips being anchored to said holder leaving the remainder of said wiper free to flex, and mechanism for rotating said holder with said bar and wiper engaging the wall of the cylinder.

5. In a rotary honing and wiping device for cylinders, a holding means having a honing bar, a flexible wiper strip comprising a length of fabric folded to form a strip substantially co-exten sive in length with said bar and a portion of the bight of said strip being adapted for engagement with the cylinder wall, a spring strip in said wiping strip for resiliently supporting the latter in wiping engagement with the cylinder wall, the inner margins of said spring and fabric strips being connected with said holding means leaving the remainder of said wiper free to flex, and mechanism for rotating said holding means with said bar and wiper engaging the cylinder wall.

6. In a rotary honing and wiping device for cylinders, a plurality of holders each having a honing element, propulsive mechanism for spreading and rotating said holders to engage said elements with uniform pressure against a cylinder wall, and each of said holders having a wiper for engagement with the cylinder wall with the wipers in following spaced relation to their respective holders and in preceding relation to following holders with respect to the direction of rotative travel of said holders.

'7. In a cylinder honing and wiping device, a radially outwardly disposed mount, a honing element and a wiper fixed to said mount and said wiper being a relatively thin flexible strip of fabric, a strip spring carried by said mount and extending laterally of said wiper to yieldingly support the latter in an extended radially outward position, and centrally disposed mechanism for advancing said mount in a cylinder with said honing element and wiper in engagement with the cylinder wall.

8. In a honing and wiping device, a mount comprising an outwardly facing channel member, a bar of abrasive material secured therein, a folded strip of non-abrasive material having itsfree edges secured in said member and the bight of said folded strip extending beyond said bar, and

a leaf spring inside said folded strip and having its inner edge Secured in said member and said spring extending toward the bight of said strip for yieldingly supporting the latter in an extended position.

9. In a honng and wiping device, a mount having outwardly disposed means for securing thereto in projecting relation therefrom a bar of abrasive material and a relatively thin strip of nonabrasive material, and said bar and strip being abreast of each other and said strip extending outwardly beyond the effective face of said bar, and a spring Secured by said means and extending outwardly therefrom for yieldingly holding said strip in an extended position.

GEORGE C. BECK.

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