US2063968A - Forging machine - Google Patents

Description

Dec. 15, 1936. w. H. WINEMAN FORGING MACHINE Filed June 11, 1931 2 Sheets-Sheei; 1

W. H. WINEMAN FORGING MACHINE Dec. 15, 1936.

2 Sheets-Sheet 2 Filed June 11, 1931 J 7 4 6 w 3 ,w a T r P y 4 J x a a K WW A 1 MW Patented Dec. 15, 1936 FORGING MACHINE Wade H. Wineman,

to Sullivan Machinery Company,

of Massachusetts Michigan City, Ind., assignor a corporation Application June 11, 1931, Serial No. 543,635

12 Claims.

My invention relates to forging machines, and more particularly to forging machines for the sharpening of drill steels. Forging machines of the class to which this invention relates are used 5 not only in blacksmith or forge shops, but also in contract work such as road building, or the like, and it is therefore highly desirable that they be readily transportable, and therefore of light weight. It is also desirable that they consume 10 a minimum quantity of the power medium which is supplied to them for the performing of their automatic operations. At the same time, it is necessary that they be adapted for the rigid holding of the drill steels upon which work is to 5 be performed during certain operations, and,

moreover, it is essential that provision be made for the accurate gaging of the steels as they are finished.

It is a primary object of my invention to provide an improved drill sharpener. A more particular object of the invention is to provide an improved drill sharpener having an improved clamping mechanism whereby through simple manpower operated mechanism a very rigid clamping can be effected. A still further object of the invention is to provide an improved gaging mechanism for drill sharpeners capable of applying the necessary pressure for the gaging operation without the use of extraneous power. Certain phases of my invention not claimable herein because of diversity of invention are claimed in my copending divisional application Serial No. 643,868. A still further object is to provide an improved forging machine having improved swaging mechanism, and from this aspect of the invention, a more specific object is to provide an improved swaging mechanism having an improved controlling means. Other objects and advantages of the invention will become apparent as the description proceeds and the several objects are attained by the organization and details of construction hereinafter more fully described.

In the accompanying drawings, I have shown for purposes of illustration one embodiment of the invention, and in these drawings- Fig. l is a side elevation of the illustrative embodiment of the improved forging machine.

Fig. 2 is a front elevation thereof.

Fig. 3 is an approximately central section taken on the plane of the line 3-3 of Fig. 2.

Fig. 4 is a horizontal section on the plane of the line 4-4 of Fig. 2.

Fig. 5 is a detail sectional view on the broken line 5-5 of Fig. 1, showing a detail of the clamp operating mechanism.

anism 5.

The main frame 1 of the machine is conveniently formed portion iii, a pair a base portion tween the leg portions l later be described.

cured thereto,

as a casting and comprises a top of lateral leg portions H and. A guide portion l3 extends befor purposes which will The base portion l2 has seas by bolts l4, a pair of foot memhers i5 serving to provide a more extended contact with the surface upon which the machine is supported.

The top portion H) of the frame member l is provided with reception of a lower clamping die l8. side, the portion it) has ber i9 supporting a pin for an upper clamping die or jaw 2i,

H for the At one an upstanding ear mem- 28 which forms a pivot the latter a suitably formed recess having ear portions 22 at opposite sides of the ear l9.

vise jaw 2! supports an upper vise jaw 23.

A suitably formed recess 23 in the upper clamping die or The lower clamping die is held in position longitudinally of the machine by a pin 25 receivable in a recess 26 in the portion of the main frame and is held against upward movement from its seat The upper clamping position by a ing 29.

by a die retaining pin 21. die or vise jaw is held in stud 28 passing through an open- The upper vise member 2| is movable angularly about the pivot pin clamping position, and it toward and from receives its movement toward clamping position from two different devices.

Both of these devices are operable by a lever 3| which is of the bell crank type and is pivoted at the end of its short arm on the frame at 32. The lever is connected at the juncture of its arms at 33 to a member 34 which comprises a body portion 35 and an angularly extending arm 36.

otally connected to a At its outer end at 3'? the arm 36 is pivvertically extending link member 38. The upper end of the link member 33 is pivotally jaw 2|.

It will be apparent connected at 39 to the upper vise that as the lever 3 l, which has a foot rest All thereon, swings counterclockwise about the pivot 32, a small angular movement will result in a substantially upward movement of the pivot point 31, with a resulting material opening movement of the upper clamping jaw 2|. pin 43 on the A spring 42 connected between a frame and an opening 44 in the link and a spring 42 connected between a pin t3 on the frame and a pin 44 on the member normally tend to maintain the lever 3| in raised position and the clamping jaw 2! open. Adjacent the upper side of the body 35 of the lever member 33 is a split threaded clamp 46 in which a rod 6? is rigidly secured. This rod at its upper end is formed with an eye 48 in which a pin :9 is mounted, the opposite ends of the pin supporting a cam lever 50 which is adapted to engage seats 5| at opposite sides of a slot 52 opening through the back side of the clamping jaw member 2| It will be understood that when the cam lever 58 is thrown rearwardly, the rod 4'? can be moved backwardly about its pivotal connection 33 with the bell crank, out of the slot 32, and permitted to engage a rest 53 suitably supported at the rear end of the machine, as will later be described. With the rod withdrawn thus from cooperation with the vise jaw 25, the spring 62 will act upon the link 38 and upon the vise jaw.

The clamping operation may now be briefly described. A steel to be clamped between the dies i8 and 24 is properly positioned upon the lower die, and the operator then depresses the lever 3! with his foot, which moves the upper clamping jaw 2| angularly about its pivot 20 to closed position. When substantially closed position is reached, the operator takes hold of the cam lever 55 and moves the same together with the rod forwardly until the lever 59 overlies the surfaces SE. The cam lever 58 is then moved angularly about the pin 49, and a clamping engagement is elfected. Then by stepping on the foot plate 30 on the lever 3|, the final clamping pressure will be imparted to the steel held between the dies l8 and 24, a very powerful clamping action being secured due to the fact that the pivot 33 lies almost directly below the pivot 32 with the result that a very great amount of pressure can be transmitted to the bit due to the fact that the mechanical advantage is very great.

Gaging of finished bits is effected between an upper gaging die 55 and a lower adjustable gaging die 56. The upper die is carried by the pivoted upper clamping jaw 2|, while the lower is mounted in a recess 57 in the frame and is vertically adjusted in that recess by a screw 58 with whose polygonal head 59 a suitable angle clamp 63 cooperates. Obviously a gaging pressure is applied to the bit to be gaged in substantially the same manner that the clamping ressure is applied, as just explained.

The upsetting mechanism 4 is supported in alinement with the clamping dies l8 and 24. This includes a percussive motor 62 secured to a supporting arm $3 carried by the main frame I of the machine. A suitable dolly guide 64 is provided to permit ready change of dollies as may be necessary. The motor 62 has a valve chest 85 to which motive fluid is supplied through a pipe 65 under control of a valve mechanism 6'! operable by a forwardly extending pivoted lever 68, downward motion of the lever opening the valve mechanism and permitting supply from the supply pipe 69 to the upsetting motor.

The mode of operation of upsetting mechanisms is so well understood that extensive description is unnecessary. It will be appreciated that when a bit to be upset has been clamped between the dies l8 and 24, the motor 62 supplied with motive fluid by downward movement of the outer end of the lever 68 will percussively actuate a suitable dolly 18 and effect the necessary upsetting and shaping operation on the end of the drill steel.

The swaging mechanism 5 comprises an upper die 72 held in position in the main frame I by the clamp 73 which is made of spring steel and bent to a radius so that tightening of the bolts '1 will clamp the die. The lower die 75 is vertically reciprocable in and guided by the guide 76. The vertical hammer motor ll is of the percussive type and is guided by its forwardly projecting sleeve portion 78 in the guide i3 previously mentioned. The lower end of the motor 11 is provided with a bore 79 in which a spring 89 is housed. The spring at its upper end reacts on the bottom of the bore 19 and at its lower end upon the head 8! of a rod 82 which is pivotally connected at 83 to the pivoted foot lever 84. This lever is journaled at 85 on a pin carried by the frame l and has a pedal or foot plate 86. At its end opposite the foot plate 83 the lever 84 has a stop portion 81 limiting the downward movement of the swaging hammer motor, and on its upper surface is provided with a valve stem engaging portion 88 which engages the plunger 89 of a valve (not shown) in the stationary valve body 90 and opens the valve on sufiicient clockwise motion of the lever B l, thereby admitting pressure to the flexible connection 9i leading to the valve chest 92 of the swaging hammer motor ll. The piston 93 of the swaging hammer motor Ti has a striking bar 84 which percussively actuates the lower swaging die 75.

The mode of operation of this mechanism will be obvious. When it is desired to swage a steel, it will be placed in suitable position against the upper stationary swaging die l2. The operator will then place his foot upon the foot plate 86 and depress the forward end of the lever 84. This will result in the rod 82 transmitting pres sure to the spring 80, and the proportion of the parts is such that the sleeve 78 will move the lower swaging die '15 upwardly to working position before material compression of the rather heavy spring 89 takes place. Further pressure on the spring after this position is reached will result in a compression of the spring and engagement of the valve operating portion 88 of the lever 84 with the valve stem 89 and an opening of the valve to admit pressure through the connection 9| to operate the swaging hammer motor.

The mode of operation of the several different component mechanisms of my improved drill sharpener has been explained as the mechanisms themselves have been described. A general summary of the operations in the sharpening of a bit is all that is necessary therefore. By the appropriate use of the swaging mechanism with intermittent use of the clamping and dollying mechanism, a bit may be formed on the end of a heated steel or a dull bit may be resharpened, and when the bit is substantially broughtto the desired finished form, gaging, with if necessary an intermittent light dollying action, may be performed.

It will be noted that the present mechanism is a very simple one, that air is consumed only in the operation of the swaging and upsetting or dollying motors, that the relatively large consumption of air which is encountered with some drill sharpening mechanisms in the operation of the clamping devices is avoided, but that by reason of the great mechanical advantage of the present clamping mechanism drill steels may be securely held and adequately gaged by forces 75 within the power of the operator himself. It will be noted, moreover, that the entire mechanism is light but rugged, that it may be readily transported from one job to another, and can easily be set up at any desired point of use.

While there is in this application specifically described one form which the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a forging machine, a stationary anvil die, a cooperating die movable bodily towards and from said anvil die, an actuating motor for said cooperating die having a blow striking portion and a guide for the latter engageable in end abutment with said cooperating die to thrust the latter towards said anvil die, means including yieldable means and an actuating element for yieldably moving said motor towards said anvil die, and means for controlling the operation of said motor actuated by force transmitted through a moving portion of said means for yieldably moving the motor but only on predetermined yielding of said yieldable means.

2. In combination, a hammering motor, guiding means relative to which the same is slidable, means for moving said motor in its guiding means into working position, and controlling means for said motor actuated by a portion of the means for moving said motor and relative to which said motor and said portion are movable bodily, to start the motor when the latter is in such working position.

3. In combination, a hammering motor, guiding means relative to which the same is slidable, a valve relative to which said motor is movable, and means for imparting a thrust to said motor to move it in its guiding means including a yielding connection, said thrust imparting means having a portion arranged to actuate said valve on predetermined yielding of said yielding connection.

4. In combination, a hammering motor, guiding means relative to which the same is slidable, a valve relative to which said motor is movable, a lever having a portion arranged to open said valve when said lever is in a predetermined position, and means for moving said motor in said guiding means including a rod having a sliding connection with said motor, operative connections between said lever and rod whereby the former may move the latter, and a spring between said rod and motor.

5. In combination, a pressure fluid operated hammering motor movable relative to its work, a throttle valve therefor relative to which said motor is bodily movable, and means for moving said motor to Work performing position and for thereupon opening said valve including a member movable to position said motor and thereafter to establish an operating relation with and move said throttle valve to open position.

6. In combination, a pressure fluid operated hammering motor movable relative to its work, a throttle valve therefor relative to which said motor is bodily movable, and means for moving said motor to work performing position and for thereupon opening said valve including a lever having an operative connection with said motor for moving the latter to working position and having a portion movable into operating relation with said throttlevalve only when said motor is in working position.

7. In combination, in a forging machine, a stationary anvil die, a movable cooperating die, and a motor for hammering on said cooperating die, a throttle valve relative to which said motor is bodily movable, a flexible fluid supply connection between said throttle valve and said motor, means for advancing said motor toward said anvil die, and means operated by said motor moving means positively to open said throttle valve.

8. In a forging machine, a supporting frame, a stationary anvil die mounted on said supporting frame, a cooperating die guided on said supporting frame and movable bodily towards and from said anvil die, an actuating motor guided on said supporting frame for actuating said cooperating die, said motor having a blow striking portion and a guide for said striking portion, said striking portion being movable within said guide to deliver impact blows to said cooperating die and said guide being engageable in end abutting relation with said cooperating die to thrust the latter toward said anvil die, means including yieldable means and means for exerting a motormoving force thereon for yieldably moving said motor toward said anvil die to move said cooperating die into operative relation with said anvil die, and means for controlling the operation of said motor moved positively by force transmitted through a portion of said means for yieldably moving said motor but actuated only on predetermined yielding of said yieldable means.

9. In combination, a hammering motor, guiding means relative to which the same is slidable, a relatively stationary controlling device for said motor normally in motor-stopping position but movable to another position to start the motor, means for imparting a thrust to the motor to move it relative to its guiding means and to said controlling device, and means moving with said thrust-imparting means to actuate said controlling device after predetermined sliding of said hammering motor to effect starting of the latter.

10. In combination, a hammering motor, guiding means relative to which the motor is movable bodily, a controlling device in fixed stationary relation to said guiding means for controlling operation of the motor, and a lever having different portions respectively operative to effect bodily movement as aforesaid of said hammering motor and actuation of said controlling device, said lever arranged to actuate the latter only when the lever has reached a predetermined angular relation with respect to the path of bodily movement of the motor.

11. In combination, a movable hammering motor, means for constraining the same to a predetermined path of movement, a relatively stationary controlling device controlling operation of the motor and relative to which said motor moves to effect hammering, and a member movable angularly relative to the path of movement of said hammering motor for moving the latter and effecting engagement and actuation of the controlling device to effect starting of the motor, said member requiring movement through a predetermined angle after initiation of motor movement prior to the engagement and actuation of said controlling device to start the motor.

12. In a forging machine, a supporting frame, a stationary anvil die mounted on said support ing frame, a cooperating die guided on said supporting frame and movable bodily towards and from said anvil die, an actuating motor guided on said supporting frame for actuating said cooperating die, said motor having a blow striking portion and a guide for said striking portion, said striking portion being movable Within said guide to deliver impact blows to said cooperating die and said guide being engageable in end abutting relation with said cooperating die to thrust the latter toward said anvil die,

means for yieldably moving said motor toward said anvil die to move said cooperating die into operative relation with said anvil die including a relatively rigid primary element and a yielding secondary force transmitting means between said primary element and said motor, and means actuated by said primary element after a predetermined yielding of said secondary element for initiating the operation of the motor.

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