USRE16534E

USRE16534E - Way guard for machine tools

Info

Publication number: USRE16534E
Authority: US
Priority date: 1925-06-08
Publication date: 1927-01-11
Also published as: US1575735A; FR612485A; GB250787A; DE494744C

Description

Jan. 11 -1927. Re. 16,534

I E. P. BURRELL El AL 7 WAY GUARD FOR MACHINE TOOLS 5 Sheets-Sheet 1 originiil Filed March 26, 1024,

Jan. 11 1927. Re. 16,534 I E. P. BURRELL ET AL WAY GUARD FOR MACHINE TOOLS Original Filled March 26. 1 2 5 sheets sheet 2 Re. 16,534 E. P. BURRELL ET AL WAY GUARD non MACHINE TOOLS ori inal Filed March 26, 1924 I Jan. 11 1927.

5 Sheets-Sheet s Jam.11,1927.'

' Re, 16,534 E. P. BURRELL Er AL WAY GUARD FOR MACHINE TOOLS Original Filed March 26, 1924 5 Sheets-Sheet 4 27. Re. 16,534 11 19 E. P. BURRELL ET AL WAY GUARD FOR MACHINE TOOLS Original Filed March 26, 1924 5 Sheets-Sheet 5 am m; u 1921. v

This invention relates to way guards for machine tools, and has particular reference to machine tools having two or more sliding members with at least one common way for n such members. i V

It is a well-known fact that in many kinds of machine tools, such as lathes, grinding machines, i and the. like, chips, dirt and dust lodgeon the Ways, and by mixing with the lubricant of the ways form an abrasive compound which causes very serious wear on fthe working or contacting surfaces of the ways and sliding members, requiring. that the contact surfaces. particularly of the ways be planed off from time to tlme, or otherwise remachined to remove the effects of the wear. ;This is not only expensive and reduces the life of the machine, but it results in an economic loss due to the fact that the machine is of necessity out of commission'while-thu", being repaired. Furthermore, a remachining of-the surfaces requires a realignment of the sliding bodies with rethe diflicultie'sof restoring the machine to a proper working condition after it has been adversely affected by wear for the reasons stated, are so greatthat it is often necessary that the machines be shipped to the factories where they were originally constructed, and this of necessitydeprives the owners of their ure' f or. a considerable period of time, as well as entailinga great deal of ex- The principal object of the invention is to provide pra'cticalmeans for guarding and protecting the workin surfaces of the ways of a'machine tool, w erein one or 'mgg e of the ways are-common to two or more slidtools of this kind and to adequately protect the workingrsurface's of the ways from the bv wrenches or heavy work pieces being 5 placed upon, or accidentally dropped on the ..ways, as they are at times, if left unprotected. The above objects are maintained by the present invention, which may be here briefly,

UNITED 'srATEs EDWARD P. BUBRELL, OF SHAKER HEIGHTS, AND JOHN J'. VAN HAMERSVELD, OF

CLEVELAND HEIGHTS, OHIO, ASSIGNORS TO THE WARNER AND SWASEY COM- PANY, OE CLEVELAND, OHIO, A CORPORATION OF OHIO.

' lation to the work holding spindle. In fact,

jng members, so as to extend the life of chips. dirt and dust, and from being injured PATENT j OFFICE.

WAY GUARD ron uacnmn TOOLS.

summarized as consisting in certain novel details "of construction, and combinations and arrangements of parts which will be described in the specification and set forth in theappended claims.

Our invention may be applied advantageously to many kinds of machine tools Original Io.1,575,735, dated larch 9, 1926, Serial No. 701,909, flled larch 26,1924. Application 'tor reissue filed November 11, 1926. Serial No, 147,838. i

In the accompanying sheets of drawings, 4

Fig. 1 is a side view of a turret lathe constructed in accordance with, or embodying our invention; Fig. 2 is a transverse sectlonal view of the same substantially along the hne 22'looking in the direction indicated by the arrows; Fig. 3 is a plan View omitting the head and showing the cross slide carriage and the turret saddle with the various operating parts omitted: Fig. 4 is a sectional view slightly enlarged, the section being taken substantially along the line 4-4 of Fig. 3, looking in the direction indicated by the arrows; Fig. 5 is a transverse sec tional view on an enlarged scale, showing "particularlythe ways and way guards and to Fig. 6 and taken at the rear end of the slight modification: Fig. 12 is a plan view corresponding to Fig. 3, showing our invention applied to a lathe wherein two ways only are provided for the cross slide carriage turret saddle. showing the same modificationzFigs. 1O and-11 are views correspo nding toFigs. 8 and 9. showing a further is a similar sectional View taken substantial- 1y along the line 14-44. of Fig. 12, looking in the direction indicated by the arrows.

Referring now to'the drawings, and first to Sheets-1, 2 and 3 thereof, 10 represents the lathe bed, 11 the head having a spindle carrying, in this instance,- a chuck 12. Additionally 13 represents a turret saddle carrying a turret 14, and 15 represents a cross slide carriage carrying a cross slide 16. All the parts mentioned may be of the usual, or any construction, as the details of these parts including the mechanisms or devices for operating or shifting them form no part ofthe present invention, and these parts may be constructed as illustrated, or otherwise, if desired. Therefore, it is not regarded as necessary to de:cribe in detail the operating parts illustrated in Figs. 1 and 2. I For supporting the turret saddle and cross slide carriage, the bed may be provided with three ways, 17, 18 and 19 as inthe construction illustrated in Sheets 1 to 4. The turret saddle in this instance travels over the ways 17 and 18, which are parallel to each other and arranged at the top of the bed, the way 17 being a rear way and the way 18 being a front or forward way, and the cross slide carriage is supported on theupper front way 18 and the lower front way 19. Therefore withthis construction the upper front 7 way 18 is common to both the turret saddle and cross slide carriage, and it'is particularly in the guarding of this common way 18 that the invention resides.

A suitable guard for the rear way 17 presents no serious problem since this way is traversed by one slide only, hence we are enabled to adequately guard this way by attaching to the front of the turret saddle a forwardly projecting way guard .20 and to the rear end of the turret saddle a rear wardly projecting way guard 20 of the desired lengths. These guards consist simply of inverted U or V shaped members which fit over the working surfaces of the way 17 and. have suitable supporting and sliding contact therewith. To enable the turret saddle to be broughtv up close to the head, if desired, the latter is provided with a c earance opening 22 (see Fig. 2) for the forwardly projecting way guard 20.

For the purpose of guarding the front I way 18, which as previously stated, is common to, or is traversed both by the turret saddle and cross slide carriage, in accordance with the present invention there is pro vided what mi ht be termed a composite guard composed of telescopic or relatively slidable members, part in supporting relathe guard for the way 18, both forwardly of and rearwardly of the turret saddle consists'of three members including a top guard member and two lower guard members, the former being attached to the turret saddle, and the latter to the cross slide carriage. In the construction illustrated, the upper guard member 23 is attached to the front end of the turret saddle so as to project forwardly from the turret saddle over the way 18 through and beyond the cross'slide carriage, and to the rear end of the turret saddle there is attached a similar upper guard member 23, this projecting rearwardly'of the turret saddle over the way 18. Tothe front side of the cross slide carriage, and in this instance, to a lateral extension 15, thereof, there are attached two

lower guard members

24 and 25 which project 'forwardlyfrom the cross slide carriage over or along the way 18 beneath the upper guard member 23 attaehedtothe turret saddle. In a similar fashion there is attached to the rear side of the cross slide carriage, similar

lower guard members

24 and 25, these members projecting through the turret saddle 13 over or along the Way 18 beneath the upper guard members, 23 and 23 attached to the turret saddle, as explained. All the before mentioned

guard members

20, 20, 23,

23*, 24, 24, 25 and 25 may be attached in any suitable fashion to the turret saddle or cross slide. carriage, as by means of screws 26 passing through ears or angularly bent ends of the guard members, as clearly illustrated in the drawings.

As herein illustrated, the

upper guard members

23 and 23 extend over and guard the top portion of the way 18, and'in this case these guard members are substantially in the form of an inverted U or V, but this particular shape is unnecessary, and these guard members may be otherwise shaped, as will be explained.

The forwardly pro ecting upper guard member 23 attached to the turret saddle passes through a cored opening 27 (see Figs. 4 and 5) in the upper portion of the cross slide carriage. This opening provides clearance between this upper guard member and the cross slide carriage, and has a shape corresponding to the shape of the guard mem-' her. This guard member 23 and the opening 27 in the cross slide carriage are, as clearly illustrated in Fig. 5, above the way 18, so that beneath this opening the material or body of this cross slide carriage is left unbroken to form the supporting portion of the cross slide carriage designed to rest upon the way, precisely the same as if the opening 27 were not provided.

The two

guard members

24 and and 24" and 25? are on opposite sides of the top portion of the way 18 and they bridge or close the space' between the

upper uard members

23 and 23 and the way. v ikewise, additionally, the

guard members

23 and 23 at or near their longitudinal edges 'rest upon and have sliding contact with the top edges of the

guard members

24 and 25 e and 24 and 25. so that the

upper guard members

23 and 23 are thus adequately.

supported. The

guard'members

24 and 25 and 24 and 25 are upright members, or have upright portions which in the preferred embodiment are parallel to-eachother, and

it is on the top edges of these upright portions that the upper guard members rest, the latter, preferably overhanging the upright rtions of the lower guard ;members, as

illustrated, to betterexclude dirt, dust, and

particularly to prevent the cutting compound getting inside the guardm'embers, and therefore on the working surfaces of the way and the members which slide thereon.

While these uprightt portions of the lower guard members are in the preferred form of the invention parallel to each other, as

i above stated, one or both of the lower guard wardly from the turret saddle. Additionally, however, these slots which have a width so that the guard members will have a close working fit therein, act as guides to hold the guard members the ri ht distance apart.

Thus the cross slide carriage and turret saddle may be brought close toeach other without any possible interference by 'reason of the ardmembers which they carry.

Additionally, clearance is provided between t -heforwardly. projecting guard members 23, 2-1 and 25 and the head 11,-and this may be accomplished as in this instance by so shaping the head that the guard members may pass :trecly alongside'of it, or if in any machmethis is not possibleor desirable, they may, to provide the necessary clearance, ex-

tend through or into an opening of the head such as the opening 22 provided for the guard over the rear way 17. c

It will be noted, particularly by reference to Fig. 4, that the cored open1ng27 extends through the upper portion of the'c'ros's slide carriage, and not through the extension 15". Likewise, it will be observed that the upper guard member 23 after passing through the cored opening 27 rests upon, and therefore, has supporting engagement with the top of this cross slide extension 15 ments the supporting action of the lower uard memb ers of the cross slide carriage ut without this support on the extension of the cross'slide, the upper guard members are This supplewell supported and by reason of the supporting action of the lower guard members they are able to withstand shocks incident .to blows accidentally delivered to the upper guard members in the use of the machine.

In the construction already described, t

upper guard members

23 and 23 rest on the top edges of the" lower guard members at tached to the'cross slide carriage, but in some instances it may be desirable to supplement this sliding contact by a more positive connection, as by forming one part in the form of a tongue and the other in the form of a groove or slot to receive the tongue. This modification in different forms is illustrated in Figs. 8 to 11. In Figs. 8 and 9 the upper guard member, designated 23, is doubled inwardly upon itself, as illustrated at 23 form-' ing inwardly and upwardly facing grooves or slots, and the two lower guard members attached to the cross slide carriage, and here designated 24 and 25", have their edge portions bent laterally and downwardly, and these extend into said grooves or slots of theupper guard member, and have sliding en- 4 gagement therein. With this construction a closer union is provided between the upper and lower guard members, and dust or the like is more efiectively excluded, particularly as it prevents the separation or gap ing have shown a constructionw erein the upiper v at, 125

guard members, here designated 23, are the edges being interlocked with the lower of the parts'forany cause, as by ablow rom I guard members, here designated 24 and 25, in the manner illustrated in Figs. 10 and'11.

We prefer that the clearance o ening in the cross slide carriage previously esignated 27 to accommodate the forwardly projecting upper guard member of the turret slide be formed so as to leave -a continuous or unbroken section of metal beneath the opening to enga e theway, but this is not essential, and in Fig. 10 .we have shown a modification in the form of this opening, the opening being here designated 27 The opening herein illustrated may be in the form of a milled slot, the bottom wall of which is not continuous. In such case the top of the way may theslots provided inthe turret saddle corre-v spond precisely to the shape,- of the lower guard members which extend throughthe turret saddle, as will be seen by reference to Figs. 9 an'd11 where the slots, designated 28, have lower parallel portions to accommodate the lower parallel portions of the lower; guard members, and have suitable enlargements which can be drilled or otherwise. formed toaccommodate the laterally or laterally and,downwardly bent upper portions of the lower guard members.

Thus it will be seen that a way guard is provided for a way, over which two slides or members are adapted to travel, and that this way is as effectively protected as is the I way over which only a. single member is adapted to travel, and it will be seen that iii this is accpmplished in this instance by the provision of guard members which are attached to both of the slides or traveling members, these guard members being telescopically arranged, and the guard member or members carried by each slide having clearance with the companion slide, and further that said guard members have supportb ing relation with respect to one another, and

together form a.housing which completely covers the workingsurfaces of the way, regardless of the positions of the sliding bodies on the ways with respect to one another and with respect to the head.

" The lathe or machine tool described above,

is provided with only one way common to both sliding members, but our invention is equally applicable to machineswherein the two or more sliding members are supported on two ways, instead of three; that is to say, wherein two ways are common to a plurality of sliding members, generally two in number, and in Figs. 12, 13 and 14 we have illustrated somewhat conventionally a turret lathe wherein the turretsaddle, here designated 13", and the cross slide carriage riage are supported in this fashion, our improved way guards are applied to both ways, as it is applied to the single common way 18 of the construction first described. In thus applying our invention to both ways, any of the modifications previously described may be employed, but in Figs. 12, 13 and 14, for convenience, the form of the invention illustrated in Figs. 1 to Bis utilized;

,that is to say,there is attached to the front end of the turret saddle, upper guard members 23 which project forwardly tlirough the cross slide carriage 15 over both ways 17 and 18, and there isattached to the rear end of the turret saddle, upper guard members 23 which project rearwardly over both ways 17 and 18. Similarly, there are attached to the front side of the cross slide carriage two pairs of

lower guard members

24 and 25, which project forwardly along the two ways 17 and 18 in supporting relation to the two upper guard members 23, and in similar fashion there are attached to the rear side of the cross slide carriage, two' pairs of

lower guard members

24 and 25 which extend through the clearances in the turret saddle beneath the upper

guard mem hers

23 and 23, as illustrated in the drawlngs.

As the inner sides of the two ways 17 and 18 are in this instance somewhat differently formed than the way .16, the long inner slant being dispensednwith the inner lower guard members may-be shaped precisely like the outer lower guard members,

and they mav be given a bearing on shoulders 17" and 18 provided along the inner sides of the ways 17 and 18, as illustrated in Figs. 13 and 14, thus providing additional supports for. these particular guard memers.

It will be seen from the above that our invention is equally applicable to. machines having either .one or a. plurality of ways common to two or more sliding members.

We 'do not desire to be confined to the precise details or arrangements shown, nor to the type of machine tool shown and de scribed, but aim in our claims to cover all modifications which do not invo'lve'a departure from the spirit and scope of our inventionas defined'in the appended claims.

Having describedour invention, we claim:

1. A machine tool having a bed with ways 'for a plurality of slidable members, one or more of said ways being common to said sliding members, and guard members extending over the common way or ways and protecting the working surfaces thereof ltlfi without interfering with-the movements of the sliding members, said guard members being In overlapping relation and one attached to one sliding member and another common to-said members, and. rigid guard members enclosing said common way or ways so as to protect the working surfaces thereof without interfering with the relative move-. ments of the sliding members, said guard members being composed of relativel sliding parts carried by said sliding mem rs.

ber.

1 3. A machine tool having a plurality of ways and a plurality of sliding members movable-along the same, one or more of said ways being common to said members, and

guard members attached to said sliding membersand extending between them in overlapping relationship and serving to protect'the working surfaces of said common way or ways without interferingwith the relative movements of the sliding members.

4. machine tool having-a plurality of sliding members,=a way over which said sliding members are adapted to travel, and a guard for said way composed of guard membersattached to said sliding members and protecting the working surfaces of said way without interfering with the relative move ments of the sliding members, each sliding member having a clearance for the guard member carried by the other sliding mem- 5, A.machine tool having a way and two sliding members adapted to travel thereover, and a-guard for such way composed of relatively slidable parts and protecting the working surfaces. of the way without interfering with the relative movements of the sliding members.

6. A machine tool having a way and two sliding members adapted to travel thereover,

and a guard for such way composed of overlapping guard members attached to said sliding members.

7. In a machine tool, a way and two sliding. members ada ted to travel thereover, and a guard for sa1d way composed of guard members attached to both sliding members and protecting the working surfaces of said way without interfering with the relative movements of the sliding members, each of the latter having an opening adapted to accommodate a guard member of the other sliding member.

8. In a machine tool, a way and two sliding members adapted to'travel thereover, land a guard for said way composed of a lurality of relatively movable guard mem ers attached to the sliding members, one in supporting'relation to another.

i 9. In a machine tool, a way andtwdsliding members adapted to travel thereover, and a guardfor said way-composed of upper an lower guard members, one attached to onesliding member and another attached 7 to another sliding member.

-10. In a machine tool, a plurality of sliding members, a plurality of ways therefor, one or more of said ways being common to said sliding members, and a guard for said I common way or ways composed of a plurality of relatively slidable guard membersincluding upper and lower guard members. 11. Ina machine tool, a plurality of sliding members, a plurality of ways therefor,

at least one common to said sliding members, and a guard for sa1d common way or ways,

said guard. being composed .of a plurality of relatively slidableguard members including an upper guard member and two lower guard members, the upper guard member being attached to one sliding member, and the lower guard members being attached to another sliding member. p

12. In a machine tool, a plurality of slid ing members and ways therefor including one or more which are common to said sliding members, a guard for sa1d common-way or ways including a guard member attached to one sliding member and having a clearance in an adjacent sliding member, and co-oper f ating guard members attached to the said adjacent sliding member and having clearance in the first named sliding member.

13. In a machine tool, a plurality of sliding members, a way over which said memhers are adapted to travel, and a guard for said way including a member attached to one of said sliding members and having a support on another of said sliding members.

14. Ina machine tool, a plurality of sliding members, a way over which said members are adapted to travel, and a guard for .said way composed of relatively slidable members including a guard member attached to one of said sliding members and having a support on said way.

15. In a machine tool, a plurality of sliding members, a way over which said membersare adapted'to travel, and a guard for protecting the working surfaces of said way, composed of a plurality of relatively mov able guard members, one of said guard members being attached to one of the. sliding members and having a support on another sliding member.

16. A machine tool having a plurality of sliding members, a way over which said members areadapted to travel toward and from each other, and a guard for said way composed of relatively movable guard members attached to said sliding members, part arranged above-and overhanging other guard member's. 17. In a machine tool a bed having a way,

a phirality of slidable members movable on said way, and a way guard member attached to one slidable memberand extending freely through another slidable member.

18. In a machine tool, a bed having a way, a pair of slidablemembers movable on said way, and a way guard member attached to one slidable member and extending through the other, said last mentioned slidable member having a hole' therethrough for the way guard member and having beneath said hole an unbroken way engaging portion.

19. In a machine tool, a bed having a way, a pair of sli-dable members movable on said way, and a way guard member attached to one slidable member and extending through and having a support on the other slidable member.

20. In amachine tool, a bed having a way,

a member slidable. on said way, and a way guard member overlying saidway and extending through the-slidable member and having a support on a portion of the slidablu member lying beneath the way guard member.

a support on one of said slidable members.

22. In a machine tool, a bed having a way, a pair of slidable members movable on said way relative to each other, and a way guard member overlying the way and at all times bridging the space between said slidable members and extending through one of said members and beyond'the same.

In testimony whereof, we hereunto affix our signatures.

EDWARD P. BURRELL. JOHN J. N. VANHAMERSVELD.