US2435303A

US2435303A - Tool post assembly for machine tools

Info

Publication number: US2435303A
Application number: US558006A
Authority: US
Inventors: Roy L Dorn
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-10-10
Filing date: 1944-10-10
Publication date: 1948-02-03
Anticipated expiration: 1965-02-03

Description

Feb. 3, 1948. R. L. DORN 35,

TOOL POST ASSEMBLY FOR MACHINE TOOLS Filed 001. 10, 1944 I 2 Sheets-:Sheet 1 40 l 2 INVENTOR Ro Lfio/a/v ATTORNEY Feb. 3, 1948. R. 1.. DORN TOOL POST AS Filed Oct. 10, 1944 SEMBLY FOR MACHINE TOOLS 2 Sheets-Sheet 2 5 lNVENTOR Roy L. floR/v T1315. T1117. 7 I I I ATTORNEY Patented Feb. 3, 1948 UNITED STATES PATENT OFFICE TOQL POST AS'SEIVIBLY FOR TOOLS 7 Roy L. Dorn, Riverdale, Calif. Application October 10, 1944, SeriaNo*. "-58,06 4 Claims. (01. 82--37-) My invention relates to an adjustable post for a lathe, a shaper, and similar tools, the post being adapted to support the cutting tool holder.

Theobject I have accomplished is the construction: of a post for holding, or supporting the cutting tool holder used on a lathe, a shaper, or other similar tools wherein the adjustment of the height, angle of cutting, or rake of the tool can easily be adjusted.

These, and other objects hereinafter referred to are accomplished by means of the device herein described and illustrated on the accompanying drawing in which Fig. l is a view of the T-slot member on the compound rest of the lathe, the T-slot being adapted to hold the adjustable tool post.

Fig. 2 is an enlarged view of a block having, a concave face adapted to cooperate with the convex base of the post, and having a hole therethrough adapted to fit over, and around the post.

Fig. 3 is a fractional view of the tool post having an approximately ellipsoid base,. the top face ofsaid base being adapted to fit within the concavity in the face of the block shown in Fig. 2.

Fig. 4 is a view of the tool post and its base, having parts cut away to better show the form of the base in section, and having the block shown in Fig. 2. assembled therewith, said block also being. shown in section.

Fig. 5 is a face view of shown in Fig. 6.

Fig. 6' shows three cooperating discsassembled, but slightly spaced apart to emphasize the fact that each disc is independent of the others.

Fig. 7 is a separate view of the center disc shown in Fig. 6, showing the center hub, or core which is constructed integral with the center disc; portions thereof being cut away to show the interior design of the hub.

Fig. 8 is a cross sectional view of the disc assembly shown in Fig. 6 along sectional line 8-8 in Fig. 6.

9 is an enlarged tool post having a modified form ofbase, and has assembled therewith the. tool holder and adjusting discs.

Fig. 10 is a tool post similar to the one shown in Fig. 9; the View being at right angles to the view shown in Fig. 9.

Fig. 11 is a tool holder adapted to fit into the slot in the tool post.

Fig. 12 shows the top face of the top disc, being a concave surface.

Fig. 13 is a rocker block, the curved bottom being adapted to fit within the concave surface of-the disc'shown in Fig. 12.

Fig. 14.- is a modified form of the face of the disc; inclines being. substituted for threads. the inclines being. spiral and rising in a clockwise direction.

either of the discs Fig. 15 is: similar in all respects to Fig. 14 ex cept the spiral of the inclines thereon describe an. anti-clockwise direction- Fig. 1-6 is a block. adapted. with cooperating blocks to vary the tool post in a leaning position.

Fig- 1'7 is another block to* be used with. the base of the tool post, and other blocks; to varythe vertical angle of the tool post.

Referring to the drawing, I have shown in Fig. 1 a tool post support 20: hav'ng a I -slot 2|, which slot. 21. runs lengthwise within. said: tool post: support 2.0. T-slot 21' is adapted-v toreceive and. hold toolpost 30. Tool post 39' has an; approximately ellipsoid. base 371i attached thereto as shown in. Figs. 3 and 4.. Block 34, shown in Fig. 2',.a sectional view thereof being; shown: in Fig. i, can be" assembled with tool post 3-05: by placing, block 34 over tool post. 3!! andthroughhole 35 in blockv 34=, the concave face 36 of said; block being adjacent to the upper surface of the ellipsoid. base 31; of tool. post 30. Assembled base 31 and block 34. should be of such size that: they can. easily enter and slide within 'F-slot 2l=. Tool holder 19 shown inFiga ll can. be inserted in slot t8. after positioning, di'scs lit. 42 and 43 shown in' Figs; 6? and 8;. and in' Fig. 9 between tool post: support 20 andtool. holder i8 Rocker block 4:9 ,.shown in- Figs. 9- and 13, is inserted within slot is: under tool holder is with the curved. surface thereof adjacent. to the concave face of disc 41:, this. arrangement being, adapted to adjust the angle of the tool holder by moving rocker block is so that the plane ofv its upper surfaceis' at the selected angle with ahorizontal line. Them by tightening set; screw 24- shown. in Fig. 9, that is by screwing it down firmly on! the top of the tool resting on rocker block 49,, the tool holder. the adjusting discs, and the tool post are all tightly clamped to tool support 20, and tothe compound rest of. the" lathe, not shown in the drawing, to which tool. support 20: is attached'.

It is; noted that in tool posts and assemblies now in use the rocker block as described is in use and it permits the tool: holder to be tilted on one plane only, but the. post is, constantly rigid in a: vertical position. In my invention I have provided for the leaning of the toolin any direction desired; and have provided the following. elements to accomplish that result. Under face 39 of base 31' is convex to enable post 30 to be leaned in any direction. Upper face 38 of base 3-1 is likewise convex for the same purpose. To hold post 39 firmly when. the selected positionor leaning of the post is attained, I- have provided block 34 which has a concave face 36;. Concave face 36' fits over convex surface 38 of base 331. It will be noted that face 36A, being the; upper face of block 34, is a: plane which can rest against the plane: under. surface of flanges 263A forming T slot 2!, and any direction post 30 may lean the convex surface 38 of base 31 engages the concave surface 36 of block 34 and will make a firm contact with tool post support 29. Hole 35 in block 34 is large enough so that block 34 will not interfere with the leaning position of the post within reasonable limits.

Hole 46 in hub 45 describes two frustums of frustums forming hole 46. When disc 43 is as sembled with tool post 33 by passing the tool used'to tilt post 30 in the direction desired. Base post through hole 46, such hub 45 will not interfere with the leaning of tool post 30. Hub 45 has a uniform outside diameter and is adapted for discs 4! and 42 to be threaded thereon, so that discs 4!, 42 and itare concentric with each other.

Members 4!, 42 and 43 are adjusting discs. Discs 4! and '32 have faces not on parallel planes but are approximately wedge shaped. Each of discs 4i and 42 have center holes 45 therein which will encircle hub 45. It is noted that when discs 4| and 42 are assembled with disc 43 between them, discs 4! and 42 can be rotated in the same or in opposite directions on hub 35. The

is partially filled with rocker t9, and discs ii; If additional space is still unoccupied, not required for adjustments, it can be filled in with washers 7 48. However in practice such needed. It is noted when such space between the tool holder and the support for the tool post is practicaly filled, by moving discs 4i and 62 relative to each other, the angle of the plane on which too] holder 19 rests can be angledin any selected position. When the angle desired has been secured, minute adjustments as to the heightof the tool holder is made as follows: Adjacent faces of discs ll, t2 and 43 have scroll threads 40 thereon, which in one position will fit together, but when rotated independently, the threads will ride on the top of each other. leaning adjustantidockwise instead of clockwise, These in-- clines are designated 46W; 46X, 40! and 4532. When discs ll and 42 having thesemodified faces are assembled with the spiral'inclined faces adjacent, and concentric with each other it will be noted that by rotating either disc without a corresponding rotation of the other, will move the discs slightly apart or together, depending on the direction the discs are rotated, and this action is adapted to make slight adjustments in the height of the tool holder from the-base,.or. tool post support. In use discs 2 and d3, heretofore d'escribed.- It

each disc in Figs. 14 and '15,

block 6|. 7 r" recess 62A and openingBED' The assembled post Having describedmy invention, I claim as new 43K and 433? are substituted haveshown four of these i can be greater or less with assembled rests against the under faces 7 can easily pass therethrough. V 7

base '31A is attached this combination post direction. Discs ii, 42

31A has a lateral, and a transverse cylindrical convexsurface on the underside of the base instead of the spherical convex surface shown in .Figsz 2, 3 and. The longitudinal center lines of those convex surfaces are at right angles. Upper surface 38A of base 31A is likewise a cylindrical convex surface the center line thereof being parallel to the center line of one of the cylindrical convex'surfaces 393. On the top of base 31A is fitted a block 6!, having a cylindrical concave surface 61A, the curve of which neatly fits on the upper surface 38A of thereon. The upper face of block 6| consists of two portions extendinglengthwise of the block, said portions being designated 65B and ME, the surfaces of said portions 8 l B and ME being curved with the diameter of the curve at right angles to the diameter of the under concave surface 61A.

Parallel with the lineal diameter of under face EiA and firmly attached to the upper face of' 62D. Block 62 is adapted tobe assembled with block 6|, the concave face of block 62 resting on the convex face of block 6! and to slide thereon. Upper face 6200f block 62 is a. plane which, when of flanges The rectangular opensuch size that post 3% 20A on post support 29. ing 62D in block 62 is of p In operating this device to thelower end of post 39; block 6| is threaded on post 30 so that'the cylindrical concave surface 1 ages the'convex cylindrical surface" of block 6i eng of base 37A. Block 62 is then threaded on post 35 so that its under cylindrical concave surface 623 to the upper convex surface 61B of C shouid engage is adjacent Rectangular guide 6| 3%, base 31A, and blocks SI and 62 are then inserted in slideway' 2 I. It will be noted that'with and 43 are then threaded over post 30, and'washers'48 are positioned between disc 42 and flanges 20 if necessary. we Rocker 49 is insertedin slot i8, and tool I9 is'likewise placed in slot [8, and whenpost 30 is positioned r at the desired angle cap screw 24 is tightened on' a cutting tool is; The cutting tool is thus held rigid in the selected position.

and ask for Letters Patent:

1 In a tool base 37A, so it can slide 30 can be rocked in any device of "the characterdescribed, a V

curved to neatly fit the upper surface of the base and adapted to slide thereon;

first independent block being diameter of the curve at right angles to the diameter of the under curve of the first independent block, a rectangular key eX- tending across the upper face of the first independent block at right angles to the diameter of the curve of the upper face of the first independent block; a second independent block approximately rectangular in form having a curved surface on the under face adapted to fit on to, and to slide on the upper pendent block, and a key way on the under side of the second independent block adapted when assembled with the first independent block to receive the key on the first independent block, holes through the first independent block and the second independent block adapted for the tool post to loosely pass therethrough, the device having a tool post support the support havtool post base, the second independent block when assembled together to pass within said inverted, T-slot, the assembled base, the first independent block and the second independent block when Within the slot being adapted to permit the post to lean within a limited degree in any direction from the vertical.

2. In a device of the character described, a tool post having a slot therein adapted to receive a tool holder and a rocker, a tool post support having an inverted T-slot therein, a base on the tool post adapted to enter the inverted T-slot, the base of the post being adapted to permit the post to lean a limited distance from the perpendicular; a plurality of discs adapted to encircle the post and to extend approximately from the tool post support to the rocker, one of said discs having a hub thereon with a hole through the hub describing two frustrums of a cone joined at the smaller diameter, the hole being adapted for the post to pass therethrough, the hole adapted for the post to lean in any direction at a, limited angle from the perpendicular, the disc adjacent to the tool post support being adapted to slide on said support, one of the discs being wedge shaped in thickness, and being adapted to be rotated independently of the other discs, and adapted when revolved to locate a position where it will fill the space between the tool post support and the rocker, screw means adapted to clamp the tool holder, the rocker, and the discs to the tool post support.

3. In a device of the character described, a tool post having a slot therein adapted to receive a tool holder and a rocker, a tool post support the upper having an inverted T-slot therein, the base of the post being adapted to permit the post to lean in a limited degree from the perpendicular, a plurality of discs having holes through the centers thereof adapted to surround the tool post and to rest, one on the top of another between the rocker and the tool post support, a plurality of the discs being wedge shaped as to thickness, each disc being adapted to rotate on its axis independently of the other discs, a plurality of the discs having involute threads on the faces of the discs adapted when the threaded faces are adjacent to each other for the crests of the threads in one disc to be within the valley of the thread of the adjacent cooperating disc, and adapted when one of the discs is rotated independently of the other disc for the threads of one disc to ride on the sloping surface of the threads on the adjacent disc, and adapted to force the cooperating discs apart.

l. In a device of the character described, a tool post having a slot therein adapted to receive a tool holder and a rocker, a tool post support having an inverted T-slot therein, the base of the post being adapted to permit the post to lean to a limited degree from the perpendicular, a plurality of discs having holes through the centers thereof adapted to be threaded on to the tool post and to rest, one on the top of another between the tool post support and the rocker, each disc being adapted to rotate on the post as an axis independently of the other discs, a plurality of the discs having involute threads on the faces of the discs, said threads being adapted when the threaded faces of two discs, adjacent to each other for the crest of the thread in one disc to be within the valley of the thread on the adjacent disc, and adapted when one disc having a thread thereon is rotated independently of the cooperating disc, for the thread of one disc to ride on the sloping surface of the thread on the adjacent disc, and adapted to force the cooperating discs apart.

ROY L. DORN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Jan. 24, 1933