US2402089A

US2402089A - Tool grinding machine

Info

Publication number: US2402089A
Application number: US529910A
Authority: US
Inventors: John W Rouse; William D Moore
Original assignee: Remington Arms Co LLC
Current assignee: Remington Arms Co LLC
Priority date: 1944-04-07
Filing date: 1944-04-07
Publication date: 1946-06-11
Anticipated expiration: 1963-06-11

Description

June 11, 1946.

J. W. lousE TOOL GRINDING MACHINE 2 Sheets-Sheet 1 Filed April 7, 1944 v INVENTOR. JOHN M/ Roz/$5 BY MAL/AM 0. Moo/45 June 11, 1946;

J. W. 'ROUSE TOOL GRINDING MACHINE Filed April 7, 1944 2 Sheets-Sheet 2 INZ ENTOR.

do/r/v M R0055 y Mil/AM 0. M0025 ATTOA/EYS Patented June 11, 1946 TOOL GRINDING MACHINE John W. Rouse, Little Falls, N. Y., and William D.

Moore, Kansas City, Mo., assignors to Remington Arms Company, Inc., Bridgeport, Cnn., a corporation of Delaware Application April 7, 1944, Serial No. 529,910

7 Claims. (Cl. 125-41) 1 2 This invention relates to a profile grinding main a rotatable chuck of some description and chine including means to support the work. and the profile tool 20 is held in a suitable work supmeans to true a profile grinding wheel by adport and advanced toward the work. The groove justing the truing elements in accordance with 23 must be very accurately cut into the tool in a gauge held in the Work support. It is particuorder to produce a correct groove in the cartridge larly adaptable for the production of profile cutcase, said groove being critical, inasmuch as the ting tools such as used for turning the head of cartridge case must feed properly into the mechthe conventional cartridge case but is not limited anisms of the gun, for w c it s designed. The thereto. The shapes of the tools for the cutting grinding wheel 24 may be of any conventional of the groove near the head of a cartridge must type a d ter A upp t 25 is P e s d be accurately produced. These dimensions and s ppo t being m e in a conventional manner angles vary for the difierent sizes and types of of alternate ferrous and non-ferrous plates, said ammunition so that the angles and size of the P s being held together by the b y b01158 wheel must be changed in accordance with the 26. This construction is used for increas the head turnin tool to be made. These and other efiiciency of the magnetic chuck but it is to be objects of the invention will become apparent understood that other kinds of material ordefrom the accompanying description and drawsighs can he used- A groove 27 s p d therein ings. for supporting the work as shown in Fig. 10 or In the drawingsthe gauge bar as shown in Figs. 3 and 9.

Fig. 1 is a side elevation with some of the parts n e e a t e eel s p fi d t t d sir d broken away and others partially in section, parts angles and face Widths y means of diamond of a conventional grinding machine being shown. twine elements. said bruins elements e n set Fig. 2 is a sectional View looking in the direcby means o e g e a s- 5 and tion 2-2 of Fig. 1. Thereafter, a blank bar or bar with the desired Fig. 3 is an end view looking in the direction .25 ter or cont ur is p ed in the groove 27 and 3-3 of Fig. 1, showing the gauge bar in place, the the groove 23 t t e n (Fig. grinding wheel being omitted, The tool truing elements will first be described.

Fig. 4 i a id vi 01 one form of gauge ban These are shown at 28, 29 and 30. It is to be Fig, 5 is an end view looking from the left of understood, of course, that the truing elements Fig. 4. 28, 29 and 30 may be of the conventional diamond Fig 6 is an end View looking from t right of type or other similar material and the expression Fig. 4. diamond-like means a truing element suitable Fig. 7 is a side view of one form of hea tu for truing the grinding wheel to be used. Truing ing tool.

elements

28 and 29 are used for truing the side Fig. 8 is an enlarged end view of a head turnsurfaces 3| and 3 of the whe l and tl'uing ing tool such as shown in Fig. 7, the relation meht ishsed for cutting 01' i g t e ed e e f to a a dge case being shown. surface 33 of the grindin wheel. The truingele- Fig. 9 is an end view looking from the right of

ments

28, 29 and 30 are adjustably mounted on i 1, showing the gauge bar located in the worktheil Carriers by means nuts 34 in some Suitholding slot. able manner. The

carriers

44, and 48 for the Fig. 10 i a fragmentary View of a head turning truing elements have a suitable groove therein tool in place in the work-holding groove with the which y be i t e yp s as s own at 36 of wheel in ontact th ith Fig. 1, there being a corresponding tongue 31 on Th Work-holding support and Wheel truj the supporting brackets 38. The bracket 38 may device are shown in use on a conventional magbe adjustably Connected (not shown) to the base inetic chuck t m machine. This may be A! (Fig. 1) in any conventional manner such as of the variety wherein the magnetic chuck table by a nut and bolt 50 as t0 allow a Change to be is reciprocated longitudinally and the grinding made in the path of travel of the truing element h 1 r th height of t chuck m is carrier. When the grinding wheel is reciprocated justable in order to obtain the proper spaced rela- 50 adjacent to

liming elements

23 and 3 Said tion between the grinding Wheel and the work on ments are reciprocated relative to the face of the the table or the diamond-like truing tools. Wheel by'means of a rocking motion of lever 39 Referring to Figs. 7 and 8, a profile tool 20 for (Fig- 3), said level being p o ed t 49 to the cutting the groove 2| in the end of a cartridge base 4|. Base 4| is attached by bolts or other case 22 is shown. The cartridge case 22 is held means to the laminated work support 25. The

across the face of the grinding wheel to dress.

the same. Similarly, movement of lever 46' (Fig. 2), pivoted at 41 on frame 4|, will cause reciprocation of the truing element carrier 43 and thus dress the surface 33 of the grinding wheel. Link 49 is pivotally mounted to lever 45' at, 50 and to the carrier at 5|. The diamonds are predeterminately set in a manner which will be described presently.

In order to set the truing elements, the gauge ar shown in Figs. 4, 5. and 6 is placed in the work-holding groove 21', the diamond truing elements appropriately being located in a prolongationof said groove. The gauge bar shown has three sets of gauging surfaces thereon, one set for caliber .50, one set for caliber .30 carbine, and one set for caliber .30 '06. It is evident that a single set may be used or that other combinations may be placed on the gauge bar. The gauge bar has a central portion 52 which rests in the work and gauge holding groove 21 of the work support 25. The angles of this groove are selected in accordance with the work to be ground. For

a head turning tool, the bottom surface 53 (Fig.

8) of the groove in the head turning tool is parallel with the bottom face 58 of the tool so that the grinding surface 33 of the wheel is parallel with the surface 54 of the groove in work support 25. A cut back portion 68 may be provided so as to allow for clearance of element 30 when the bar is being used to set

elements

28 and, 29.

Surfaces

55, 56 and 5'! are for the purpose of setting the diamond 30 which dresses the face 33 of the grinding wheel. 7

Faces

55, 56 and 5'! are spaced above surface 52 the depth from th bottom of groove 53 of the tool to the lower face 58 thereof. Corresponding gauge surfaces 60 and 60' (caliber .50) 6| and 6| (caliber .30 carbine),

62 and 62' (caliber .30 '06), are located on the opposite end of the gauge bar, these surfaces being designed for setting

diamonds

28 and 29 to out side faces 3| and 32 of the grinding wheel.

Referring to Fig. 3, the gauge bar 63 is shown located in the groove in the work support with the diamonds adjacent the desired surfaces and arranged so that they can be brought against the surfaces thereof or a feeler of predetermined thickness placed between the diamond and. the surface to prevent scratching thereof. A set of surfaces is selected for the head turning tool to be made. In order to set the diamond 30, the gauge bar 63 is reversed in the groove 21 so that the

appropriate surface

55, 56 or 51 is over the diamond 30, at which time the diamond may be adjusted by means of nut 34 to touch the gauge surface or to touch feelers thereon. After the diamond has been set, the side faces 3| and 32 of the wheel are firstsurfaced to the correct type of face desired.

The usual grindingmachine of the type shown has a dial for raising and lowering the chuck table with a depth. indicator thereon. The reading on the indicator is noted at the time when the side surfaces are in their correct state. The surface 33 is then dressed by means of the diamond or. truing element 30, the indicator for the table being brought to the same figure as when the side surfaces of the wheel were dressed. In this manner, the correct angles and sizes of surfaces are obtained on the wheel.

Inasmuch as the diamonds, when adjusted by the gauge, have the correct height above the surface of the work supporting groove 21, a piece of tool stock which has had its other surfaces brought to their correct dimensions, may be placed in the groove and groove 53 cut therein,

bringing the table indicator for the final cut to the. same indication as when the wheel was dressed. For fine work, the wheel can be dressed before the final cut is made, the new depth indication being. noted and the wheel brought to the-same depth. indication for the final cut for the groove 53 in the head turning tool.

In. these and the setting operations the gauge bar or workpiece respectively is held in place by the action of the magnetic chuck, care being taken to wipe the bar or-piece and groove 21 clean. It is apparent that other means than a magneticchuck may be employed to hold thesup.- port.

The

surfaces

65 and 63 defining the groove which runs the length of the gauge bar serve as vertical and horizontal gauging surfaces in order to position correctly the support on the magnetic chuck when the gauge bar is in place, the angles of these surfaces being so chosen in relation to the surfaces of the groove 21 as to be vertical and horizontal respectively.

Merely by way of example, for the caliber .30 '06, caliber .30 carbine, and caliber .50, the angle A (Fig. 8) is 45". The angle B for these cartridges varies slightly but this is governed by the angle to which surface 61 is ground. The surface 54 makes an angle of 22 /2' with the horizontal, and surface 68 makes an angle of (SW/2 with the horizontal. These angles are merely by way of example and may be changed to suit the particular head turning tool or other tool being made. With the angle selected, the face 3| and 32 of the wheel will be substantially equiangular with the vertical as shown in Fig. 2-. By using a groove which is horizontally located, as. shown in Fig. 9', the tool and gauge will rest therein and initially be positioned by gravity. When the current is turned on for the magnetic chuck, the tendency will be for the tool to-seat itself properly in the groove. For this reason, a V-shaped groove in the horizontal surfaces wherein the faces of the V make an angle with the vertical. will be more efficient in positioning the gauge bar and tool in the work-holding support. It is to be understood, however, that the groove may take other forms than that shown.

What is claimed is:

1. In a profile grinding machine, a work and gauge holding device comprising a work-holding rest having a work and gauge holding surface thereon, a plurality of grinding wheel truing elements aligned with saidwork-holding surface and each slidably supported by said rest for truing a surface of a grinding wheel to a predetermined profile, saidtruing elements being individually adjustable to fit a gauge bar held on said workholding surface.

2. In a profile grinding machine, a work and gauge holding support comprising a work-holding' rest having a workand gauge holding groove therein, said support being adapted to be held by a magnetic chuck; a plurality of adjustable grinding wheel truing elements for each of the profile surfaces respectively of a grinding wheel; means held by said work and gauge support for movably mounting each of said truing elements, said truing elements being adjustable to fit a gauge bar held in said groove; and means to reciprocate said truing element mountings for truing the faces of a grinding wheel brought in proximity thereto to a predetermined profile.

3. In a profile grinding machine, a work and gauge holding support comprising a Work-holdi rest having a work and gauge holding groove therein; a plurality of adjustable diamond-like Wheel truing elements for each of the profile surfaces respectively of a grinding wheel; means held by said work and gauge support for movably supporting said truing elements for rectilinear movement parallel to said profile surfaces; and means for adjusting the height of said elements relative to said supports in accordance with a gauge bar held in said groove.

4. In a profile grinding machine, a work and gauge holding support comprising a work-holding rest having a work and gauge groove therein; a plurality of adjustable diamond-like wheel truing elements for each of the profile surfaces respectively of a grinding wheel; means held by said work and gauge support for movably supporting said truing elements for rectilinear movement parallel to said profile surfaces; means for adjusting the height of said elements relative to said supports in accordance with one set of several sets of gauging Surfaces on a gauge bar held in said groove, each set having a surface at each end of said gauge bar.

5. In a profile grinding machine, a Work and gauge holding support comprising a work-holding rest having a work and gauge-holding groove therein; not less than three diamond-like wheel truing elements for each of the profile surfaces respectively of a grinding wheel; means held by said work and gauge support for movably supporting said truing elements for rectilinear movement parallel to said profile surfaces; means to reciprocate said truing element mountings, at least two of said mountings being connected together; means for adjusting the height of at least two of said truing elements in accordance with one of several sets of surfaces on a gauge bar held in said groove; and means for adjusting other of said truing elements in accordance with surfaces on another portion of said gauge bar held in said groove.

6. In a profile grinding machine, a work and gauge holding device comprising a work-holding rest having a work and gauge holding groove therein; a plurality of adjustable grinding wheel truing elements for eachof the profile surfaces respectively of a grinding wheel; truing element mounting means held by said work-holding rest for movably supporting each of said-truing elements, said truing elements being adjustable to fit a gauge bar held in said groove, said adjustment being such as to give the correct profile cut on the wheel to a piece of work in said groove; and means to reciprocate said truing element mountings for truing the faces of a grinding wheel brought in contact thereto to a predetermined profile.

7. In a profile grinding machine, a work and gauge holding support comprising a work rest having a V-shaped work and gauge holding groove in a horizontal portion thereof; a plurality of adjustable grinding wheel truing elements for each of the profile surfaces respectively of a grinding wheel; means held by said work and gauge support for movably mounting each of said truing elements, said truing elements being adjustable to fit a gauge bar held in said groove; and means to reciprocate said truing element mounting for truing the faces of a grinding wheel brought in proximity thereto to a predetermined profile.

JOHN W. ROUSE. WILLIAM D. MOORE.