US2634614A - Head for spinning, drilling, and the like - Google Patents

Description

April 14, 1953 A. NYQUIST 2,634,614

HEAD FOR SPINNING, DRILLING, AND THE LIKE Filed Sept. 19, 1949 4 Sheets-Sheet 1 \NVENTOR Aru'uua NYQW ATTORNEYS April 14, 1953 A. NYQUIST 2,634,614

HEAD FOR SPINNING, DRILLING, AND THE. LIKE Filed Sept. 19, 1949 4 Sheets-Sheet 2 *Fae-KL.

\uvem'ow. Amman Nvqws A-r-voawsvs April 14, 1953 A, NYQUIST 2,634,614

HEAD FOR SPINNING, DRILLING, AND THE LIKE Filed Sept. 19, 1949 4 Sheets-Sheet 5 'FmnB.

\NVENTOR Aa-mua NY ms'r A ToRNEYs April 14, 1953 A. NYQUIST HEAD FOR SPINNING, DRILLING, AND THE LIKE Filed Sept. 19, 1949 4 Sheets-Sheet 4 w ARTHUR Nwams-r I? G'- 7- a ATTORNEYS Patented Apr. 14, 1953 HEAD FOR SPINNING, DRILLING, AND THE LIKE Arthur Nyquist, Grandville, Mich, assignor to Winters & Crampton Corporation, vGrarnlville, Mich, a corporation of Michigan Application September 19, 1949, Serial No. 116,527

7 Claims. 1

The present invention relates to a power driven head which is adapted for use in spinning, drilling, reaming, countersinking and other similar mechanical processes, and which is directed to a novel structure for the attainment of such spinning and the like rapidly and efiiciently. It is a primary object and purpose of the present invention to provide a head with mechanism organized and assembled for rapid spinning, drilling and other like processing of metal by means of which such processes are effectively carried out, the structure being sturdy, durable and practical and equipped with means for adjustment which permits correcting and spinning, countersinking or other processing while the head is in operation, thereby obtaining correct results, substantially instantly as against trial and error methods which would be required if any correction of the position of the tools had to be done while the machine was at rest.

A further object of the invention is to provide a-head having mechanism therewithin which performs a spinning, drilling or other operation in a predetermined period of time governed by one rotation of a shaft in the machine, which is automatically stopped at the completion of such shaft rotation, and is started through novel means by the operation when a spinning, drilling or other operation is to be performed. Other objects and purposes and mechanism for the eflicient attainment of the same will appear and be understood from the following description, taken in connection with the accompanying drawings, in which,

Fig. 1 is a longitudinal section through the head of my invention substantially on the plane of line l-l of Fi 3.

Fig. 2 is a similar section in a plane generally parallel to the plane of Fig. 1, parts being broken away for better disclosure.

Fig. -3 is a similar section at right angles to Figs. 1 and 2 substantially on the plane of line 33 of Fig. 2.

Fig. 4 is a fragmentary enlarged elevation illustrating a modification in the cam structure for controlling the feed of a drill, countersink or the like.

Fig. 5 is an end elevation. Fig. 6 is a fragmentary section showing the bearing mounting at one end of the controlling cam carrying shaft,

Fig. 8 is a horizontal sectionsubstantially on the plane of line 8-8 of Fig. .2.

Like reference characters refer to like parts in the diiferent figures of the drawings.

The head includes a hollow housing I in which the major portion of the mechanism is contained and which housing is filled with oil. The housing has at one side flanges la for the securing of it to a suitable support. The head may be located either horizontal or vertical. In a horizontal position it may be attached to a suitable bed by bolts or other fastening means connected with the flanges la, and in vertical position to a suitable vertical post or other support by attachment of such flanges thereto; In the drawings the head is illustrated in vertical position but it is to be understood that it is equally usable in horizontal position.

At one end of the housing, the upper end as shown in the drawings, the housing is closed by plate 2. A driving shaft 3 shown equipped with a driving pulley l extends downwardly through the top plate 2 into the housing and is connected by a. coupling 5 with a shaft or spindle 6 in alignment therewith, the upper end portion of which extends through suitable anti-friction bearings 1 carried by an arm which is permanently secured to a plate 8 located against and connected to one of the sides of the housing I (Fig. 2.) The shaft 6 is equipped with a worm 9 below which (Fig. 7) is a supporting arm i0 into which the lower end of the spindle 6 extends and rctates, being enlarged in diameter and interiorly bored upwardly from its lower end axially, making a hollow shaft section I! as shown.

The upper end portion of a tool carrying shaft or spindle I2 is slidably received in the axial opening of the section II. The shaft l2 at its upper end portion is provided with a plurality of grooves l3 around it, usually 4 in number. Pins 54 carried on the sleeve section II of the shaft 6 are fastened at their inner ends to shoes l5 located in and slidable lengthwise of the grooves 3. This provides a spline connection between the shafts 6 and I2 so that the shaft 12 may be directly rotated by the shaft 6 but have longitudinal movements with respect thereto. Between the lower end of the worm 9 and the bracket or arm support I!) below it an anti-friction thrust bearing is provided. The shaft 12 between the arm or bracket support 10 and the lower end of the housing has a collar Hi thereon, integral with or permanently secured thereto, above which is a roller bearing l-l withupper and lower retainers, as shown, against the upper surfaceof which a plate It is positioned Ihe integral with the gear.

a lower side or bottom of the housing I has a V relatively large opening therethrough in which compression spring 28, preferably of the form 7 shown, is located between the member l9 and the collar [6 with a thrust bearing between the upper end of the spring and the lower side of the collar, the normal action of which is to move the shaft I 2 to upper position.

A worm wheel 2! on a shaft 28, mounted at its ends in roller bearings (Fig. 3), meshes with and is driven by the worm 9. A gear 23 also on shaft 22 drives a larger gear 24 with which it is engaged which is loosely mounted upon a shaft 26 paralleling the shaft 22 and below it in the vertical position of the head. At the inner face of the gear 24 one member of a clutch 25 is formed The shaft 26 (Fig. 6) has a narrow collar 26a abutting a bearing 2E0 which is retained in its indicated position by a "circular plate 261) through which the shaft 23 passes. shaft 26 but will drive such shaft when a cooperatingclutch member 27 splined on the shaft The gear 2 may rotate freely upon the connects with the clutch member 25. Such 'clutch' member 27 normally will connect with the clutch member 25 through the pressure'of a spring 28 around the shaft 26 which is located betweenclutch member 21 and a cam 29 fixed to the shaft 26.

A lever 30 has two sides connected together between which, substantially mid-way between its ends, a transverse roller 3| is mounted for 'rotation to bear against the cam 29. The free ends 3041 of the sides of the lever 39 extend to and overthe plate I8 and are rounded at their edges to bear against such plate. The'opposite end of the lever 30 is pivotally mounted at 32 on an adjustable fixture 33 which is slidable at one end portion in a guide 34 on a side of the housing I, and at the other end has connection with an adjusting screw 35, the shank of which passes through the bottom of the housing with a knurled head at its outer end'for manual turning. Adjustment of the screw 35 shifts the pivoted end of the arm 30, thereby adjusting the roller 3| with respect to the cam 29.

A member 36 in the form of an outwardly extending rib is secured at the outer side of the hub of the member 21. To cooperate therewith, a trip dog of bell crank lever form, having two arms 3! and am at right angles to each other,

is pivotally mounted at the junction of the arms on bracket or arm [0. A pin 38 extends downwardly from the horizontal arm 37 and is in the path of movement of the member 35, so that when said member comes to the pin 38, by'camming action thereagainst it, the attached clutch member 21, is moved on the shaft 26 to disengage from the clutch 25.

A link 39 connects the arm 31 of the trip dog 7 with a rod 40 which passes through the upper end 20f the housing. 'Its upper end is connected'with the armature II of a solenoid 42.

A guide s1eeve43 for the rod 4!) is provided.

Sealing gaskets or rings 44 to prevent the loss of oil from within the housing are used at the .lower end of the member I9, around the shank of the adjusting screw 35 and around the rod .40 as shown. 7

At the lower end of the spindle or shaft, l2 a 'sion of the spring 20.

spinning tool, or a drill, reamer, countersink tool or other similar tools may be connected through suitable adapters therefor and in the usual manner that such tools are secured to shafts which drive them. In practice, for example in spinning, the work which'is to be spun'into shape, usually of sheet metal, may be placed in position below the spinning head when the shaft 52 is at its upper position, or conveyed thereto and stopped between. the cycles of operation. The solenoid is energized momentarily and in suitable manner by closing a switch in an electric circuit in which the solenoid winding is included. The switch may be either automatically, manually or foot operated. On closing the switch, the armature 5! is elevated, thereby lifting the pin 38 which, under such conditions will be bearing against the member 33 and holding the clutch member 21 disengaged from its cooperating member 25. On lifting the pin 38 the two clutch members connect together, cam 29 being turned when such connection occurs. As shown in Fig. 1, the turning of the cam in a counterclockwise direction depresses the free end of the lever 3&3 which, bearing against the plate 18, forces shaft i2 downwardl with a compres- Such downward forcing of the shaft carries the spinning tool to the work which is to be processed. For spinning, the downward movement of the shaft I2 and the spinning tool connected therewith is uniform and continuous until the shoulder shown in Fig. l of the cam is reached, whereupon the spring 28 lifts the shaft i2 and the spinning tool connected therewith above the work.

When the shaft 23 has made one complet revolution the pin 38 will again be in position to be engaged by the member 35 to thereby disconnect the clutch 21. To insure that the pin 28 will be in such position, the arm 31a of the trip dog is provided. It, when the pin 38 is lifted, is moved into the path of movement of the member 36 which, on the rotation of clutch mem# her 2?, comes to the inner side of the arm 21a and moves it to return the pin 38'to the position where it will be engaged by the member 35 upon reaching such pin, thereby insuring that one revolution and one only of cam 29 shall take place. Such insurance provided by the structure described is more necessary when the head of the present invention is located horizontally than when it is located vertically. The energizing of the solenoid is momentary only, the circuit which supplies it with the necessary electric current being immediately broken upon release of pressure in the switch which closes the circuit.

As shown in Fig. 4 the bearing edges of the cam 29 are made up of a series of successivefiattened steps 29a and 2922 those at 2% being shorter than at 29a. They are so designed that the work shaft l2 may be properly advanced when it is desired that the spinning or drilling not be uniform and continuous, but in a seriesof successive steps. In a spinning operation, --these steps make it possible to spin harder metaland at the same time obtain a smooth, properly formed spun surface. In drilling, these steps act as chip breakers. The drill entersv the metal,

being fed for'a short distance, and then rotates therefor are subject to variations in their peripheral edges which bear against the roller}! in accordance with the type of operation which nections between said first and driving shafts for driving said first shaft by the driving shaft and for permitting longitudinal movement of the first shaft with respect to the driving shaft,

spring means normally moving said first shaft inwardly, a lever having a free end operatively connected with said first shaft, said lever being pivotally mounted at its opposite end, a roller on'the lever between its ends, a member to which said lever is pivotally connected movably mounted within said housing, a screw operable from outside the housing connected with said member for adjustment to vary the position of the pivoted end of the lever and the position of the roller carried by said lever, a third shaft, a cam on the third shaft engaging said roller, driving means between the driving shaft and the third shaft including a separable clutch for driving said third shaft when the clutch is connected, trip means movably mounted adjacent said clutch means on the separable clutch for disconnecting the clutch when the shaft and cam thereon have made a complete revolution, said trip means holding the separable clutch disconnected, and means for moving said trip means to release the clutch.

6. In a structure of the character described, a drive shaft, a work shaft axially aligned there- 'with, said work shaft being driven by said drive shaft and longitudinally movable with respect thereto, means urging said work shaft to retract toward said drive shaft, a pivotally mounted lever for urgingsaid work shaft to advance away from 'said drive shaft toward an operating position, a

cam for actuating said lever, means including clutch means for drivingly connecting said drive 's'haft and said cam, clutch control means for 8 automatically disconnecting said cam from said drive shaft upon completion of each cycle of rotation of said cam, and means for adjusting the position of the pivotal axis of said lever longitudinally with respect to said shafts.

'7. In a structure of the character described, a drive shaft, a work shaft axially aligned therewith, said work shaft being driven by said drive shaft and longitudinally movable with respect thereto, means urging said work shaft to retract toward said drive shaft, a pivotally mounted lever for urging said work shaft to advance away from said drive shaft toward an operating position, a cam for actuating said lever, means including clutch means for drivingly connecting said drive shaft and said cam, clutch control means for automatically disconnecting said cam from said drive shaft upon completion of each cycle of rotation of said cam, and means for adjusting the position of the pivotal axis of said lever longitudinally with respect to said shafts, said cam having a predetermined irregular cam surface whereby said lever is actuated to advance said work shaft in accordance with a predetermined schedule during each cycle of operation of said cam.

ARTHUR NYQUIST.

References Cited in the file of this patent UNITED STATES PATENTS Date

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