US2392536A

US2392536A - Hydraulic key seater

Info

Publication number: US2392536A
Application number: US520404A
Authority: US
Inventors: Theodre S Kline; Rogers George Kay
Original assignee: CAPITOL MACHINE AND WELDING WO
Current assignee: CAPITOL MACHINE AND WELDING WO; CAPITOL MACHINE AND WELDING WORKS
Priority date: 1944-01-31
Filing date: 1944-01-31
Publication date: 1946-01-08
Anticipated expiration: 1963-01-08

Description

Jan. s, 1946. T s K NE ET AL 2,392,536

V HYDBAULIC KEY SEATER Filed Jan. 31, 1944 3 Sheets-Sheet l .Jan. 8, 1946. T. s. KLINE ETAL 2,392,536

HYDRAULIC KEY SEATER Filed Jan. 31, 1944 5 Sheets-Sheet 3 Mt -mb A TTYS Patented Jan. 8, 1946 HYDRAULIC' KEY SEATER Theodore S. Kline and' George Kay Rogers, Sao 'ramentm Calif., assignors to Capito1 Machine and Welding Works, Sacranento, Calif., a copartne-ship Application January 31, 1944, Serial No; 520404 Claims.

This invention relates to machine tools, and particularly to a keyway cutter or key seater.

One object of the invention is to provide a tool of this type provided with a reciprocating tool holding bar, and a means for controlling the movement of the bar so that with advancing movement thereof the tool cuts the key-way, while with the retracting movement of the bar the tool s automatically and first moved :clear of the cut just made so that no possible marring of the cut by, the retracting tool is possible.

Another. object is to construct the tool so that the bar may be set to make a straight or teper key seat as may be desired, without interfering With the clearing of the tool from the cut during the retractive stroke, and without the necessity of making the work supporting table adjustable,

A further object is to provide a tool of this type in which the movement of the bar is hydraulically actuated, and in which the movement of the hydraulic fluid may be either electrically or mechanically controlled upon the bar reaching its limit of movement in opposite directions, so that the bar will be reciprocated contimously and automatcially as long as desired.

Another object is to provide means incorporated with the control means to enable the length of the stroke of the tool bar tobe altered as the work may require.

The objects we accomplish fby means of such structure and relative arrangement of parts as will fully appear by a perusal ofthe following specification and claims.

In the drawings similar characters of `reference indicate corresponding parts in the several views:

Figure 1 is a sectionalelevation of our improved key seater, showing the tool. bar moving on a cutting stroke.

Figure 2 is a side elevation partly in section on the key seater, showing the tool bar moving on its retractive stroke.

Figura 3 is a: fragmentary sectional plan on the line` 3-3' of Fig. 1.

Fieure 4 is a fragmentary transverse section on the line 4-4 of Fig; 1. v

Figure sis a diagram showing the control system of the key seater.

Figura, 6- is a fragmentary sections] elevation i 1the tool bar showing the mounting of the Referring now more particularly to the characters o reference on the drawings, the machine comprses a :base-l which includes a reservolr 2 base are rigidly spaced side frame plates 3, bridged on top at the front end by a bed 4 which supports a slide 5, which in turn supports a cross slide 6, the latter forming the work supporting table. The bed and slides are provided with center openings 1. y

- Disposed below the bed 4 is a depending auxiliary frame 8 which includes spaced side plates 9, this frame beingiormed with vertical parallel guideways ill for a slide l l. This slide is provided a t the top with a boss l 2 projecting tor- Wardly and under the opening '1. This boss forms a clamping support for the base portion of an upstanding, `preferably cylindrical, tool holding bar !3 which projects upwardly through openings] to a point a considerabl distance above the table 6. The frame 8 is pivoted adjacent its upp r forward end on the main frame plates 3 by trunnions |4 so that said frame 8 can swing about a center relatively close to the -bed 4.

Back of- -the auxiliary frame` 8, a vertical hydraulic cylinder !5 is supported from the plates 3 centrally therebet ween by means of brackets IS. The piston rod l'l depends from the pisten I& of said cylinder and at its lower end is connected by an upwardly projecting link 19 with a boss. 20 on the back of the slide ll. As the pi'ston rod descends thereforethe slide H and tool holding bar are lowered, the lowermost point of movement 'of the slide being such that the tool. 2'I mounted on the bar is then below the level of thework supporting table 6, and hence below any i work piece W mounted on said table.

The tool 2| is mounted is a diametral slot 22 in the bar |3 in a forwardly facing direction,` and is removably clamped in the slot by a set screw 23 projecting upwardlyfrom below the tool and accessible from a socket 24 open to the back of the bar from below the slot 22, as shown in Fig. 6.

Projecting rearwardly from the side plates 9 of the auxiliary frame -8' at the top are arms` 25', which project between the cylinder !5 andthe plates 3 and are connected at their rear end by a cross web 26. A post* 21 projects upwardly from the cross web and supports a forwardlyextending arm 28 which has a guide sleeve 29 at its forward end through which the tool bar l3` slides, the tool 2! being of course below the sleeve at alltimes; i

Mounted in fixed. connection with the frame plates 3- below the web 26 is a hydraulic cylinder 30, much `shorter than the cylinder l 5 but of greater' cross sectionalarea. The pisten rod 3! projects upwardly from the piston 32 of cylinder fOfOl therebelow. Projecting upwardly from: the 30', and is operativelyconnected to the web. Up-

ward movement of the piston rod and consequently the arms 25 are adjustably limited by suitable stop means, here shown as being a pad 33, rigid with the arms 25 at their rear end and engaged by a cooperating pad 34 adjustably Suspended from a cross bar 35 supported from the plates 3. Downward swinging of arms 25 and the accompanying forward swinging of the auxiliary frame 8 and parts mounted thereon, is adjustably limited by a horizontally adjustable cushion stop 35 projecting rearwardly from' the cross bar 31 on the 'plates 3 in front of the rame 8 and below i boss l2, and engageable with a pad 38 on said f rame.

i An oil supply pipe 39 extends from an oil pres- I sure chamber 40 to the top of cylinder 15, with a branch 4l to the bottom of cylinder 30.

i 42,- respectively; the valve 41 controlling the flow from the chamber 40 through the'pipe 39 and al- 'ternately from the pipe 39 to a pipe 49 leading to the reservoir 2. `The valve 48 similariy Controls 'the flow fromthe chamber 40 through the pipe '42 and alternately from said pipe 42 back to the reservoir 2 through a pipe 50, as shown in Fig. 5. The' valves are controlled by solenolds 5'I and 52, respectively, which are alternately energized. by the reciprocating movement of the slide ll in opposite directions by the following means: r

Mounted on the outsideof one plate 3 is a ve'rtical rod 53 guided for limited vertical movement in a sleeve 54 fixed on saidplate. This rod has adjustable stop collars 55' and 55, respe'ctively, above and below the sleeve. A finger 51 is mounted on the slide ll and projects laterally through slcts 58 inthe adjacent plates 9 and 3 and disposed between the collars, as shown in Fig. 4. A normallyopen switch 53 is mounted above the rod 53, to be closedthereby upon upward movecollar and forces the rod 53 down( This causes the switch 60 to be closed and allows the switch 59 to open. The solenoid 5l thus becomes deenergized and the solenoid 52' is energized. The valve 41is therefore shifted to establish communication between the pipes 39 and 49,'whi1e the i valve 48 is shifted toestablish communication between the pressure chamber 40' and the pipe 42, by which oil is fed to the bottom-of the cyl-,

allows the oil from above piston !8 and below piston 32, respectively, to drain back to the. reservoir.' The piston' 32 will thus be lowered to pull the' arms 25 down, while thelpiston |8 will be r forced up 'so as to lift the slide ll. Due to the ment of said 'rod and interposed in the circuit C of the solenoid 51 Another normallyop en switch 60 is mounted j below the rod 53, to beclosedupon downward 'movement of the rod and interposed in' the circuit i i of thesolenoid 52. r v

In operation, y assuming that the' tool 2l is Y 'making a. key sat'S in the bore B of the work W,

and is 'on a downward `'cutting stroke, as shown in Figgl, the switch 59 is' closed by the previous upwardmovenent of rod 53 and remains closed due'to the use of a yielding stop El holding said rod against downward movement. The solenoid 5l is then energ'iz ed, turning the valve 41 so that oil flows fron thechamber through the pipes "39 and 4l to the top of cylinder l5 and the bottom of cylinder 35, respectively. The slide ll and i tool bar are thus not only forced down but the i arms 25 of the auxiliary frame are forcedup relatively large size of the cylinder 30, this functions to swing the arms before any appreciable upward movement of slide ll takes place.

Thetool bar is thustilted to the position shown in Fig. 2, so as toback the tool away from the cut in the key seat, so that when the bar'l 3 moves up, the tool is pulled clear of the cut right from the start. As soon as the slide reaches the top limit of its movement, as determined by the setting of collar 55, the position of valves' 41 and 48 is again reversed, to 'cause the slide ,H `to be lowered and the arms 25 to be swung up, restricting the tool bar to a perpendicular'or Operating position before any actual cutting takes place. y

From the foregoing description it will bereadily seen that we have, produced such a device as substantially fulflls the objects of the invention, as defined by the appended c1aims.

While this specification sets'iorthin detail the present; and preferred Construction of the device, 'still in practice such deviations from such detail may be resorted to as'do not forma departure from the spirit of the in'vention as defined by the appended claims' i i Having thus described our invention, what we claim a's new and useful and desire to secure by Letters Patent isz' 1. A key seating machine comprising a frame i having a fixed work supporting table thereon, said table having an opening therethrough, a 'slide-below' the table mounted in connection with the frame for vertical movement, a tool holding bar 'projecting upwardly from the slide and through the ,table opening, a vertically disposed hydraulic cylinder supported from the f rame behind the slide, a piston rod depending from the cylinder and connected to the slide, fluid' conduitsleading toopposite ends of the cylinder,`and means controlled by slide movement upon arrival of the slide at opposite ends of a stroke of predetermined length to control flow of fluid ,through the conduits to and from opposite ends? of the cylinders alternately. i i V 2. A structure as in claim 71, in whichsaid means 'comprises valves in' the conduits`, electric devices for`actuating the valves, a vertical rod against the stop 34, as shown in Fig. 1. If the i stop 34 is' set so that the slide II and bar 13 are theni perpendicular, ja straight keyway will be -cut inlthe work,rbut if the stop isadjusted o that the bar l3 then leans in one direction or thefother, a taper keyway will be cut. j

y 'Whentheslide approaches the bottomlimit of its strok'efas determined' by the adjusted seti 4 'ting of the collar' 56, the finger' 51 ngages said collarson the'rod, a finger'rigid with the slide and projecting between the collars to alternately engage the same and move the rod, c i rcuitsfor said devices, and normally open switches in said circuits disposed so that one switch will be closed by rod movement in one direction while the'other switch will be closedbyrod movement in the opposite direction.

3. A key 'seating machine comprisin'ga frame ;having a fixed work suporting table thereon; said* table ,having an i opening "therethroughy a "slide below the table, an auxiliary frarne in which'the slide is mounted. for vertical movement, means pivoting the auxiliary frame on the first named rame immediately below the table and opening therein, a. tool' holding bar fixed on and projecting upwardly from the 'slide and through the opening, a tool mounted in' the bar and projecting from one side thereof in a plane at right angles to the axis of the pivot of the auxiliary frame, means to. reciprocate the slide through a stroke' of predetermined: length, and means: functioning upon arrival of the slide at the bottom' of its 'stroke totilt the auxiliary rame in a direction to retract the tool relative to its path of down- -ward movement before upward movement of the slide begins, and functioning to restare the aux- .iliary frame to its initial position upon arrival of the slide at the end of its upward movement.

4. A machine asin claim 3 with means to adjust theinitial position of the slide relative to the perpendicular without affecting the subsequent tilting of the slide.

5. A machine as in claim 3, with a bar rigid with and upstanding from the auxiliary frame in bypassing relation to the table, and a guide sleeve for the tool bar fixed in connection with the upper end of the post.

6. A key seating machine comprising a frame having a fixed work supporting table thereon, said table having an opening therethrough; a slide below the table, an auxiliary frame in which the slide is mounted for vertical movement, means pivoting the auxiliary frame on the first named frame immediately below the table and opening therein, a tool holding =bar fixed on and projecting upwardly from the slide and through the opening, a tool mountedin the bar and projecting from one side thereof in a plane at right angles to the axis of the pivot of the a'uxiliary frame, means to reciprocate the slide through a stroke of predetermined length and including a hydraulic cylinder mounted on the first named frame and having a piston rod connected to the slide, another hydraulic cylinder mounted on the first named frame and having a pisten rod connected to the auxiliary iframe to tilt the same from a normal position in a direction away to retract the tool from a cutting position upon movement of said piston rod in one direction, a fluid-pressure Conduit unit connected to one end of the first named cylinder and to one end of the second named cylinder in such relation that the slide will be moved up and the auxiliary frame tilted upon a flow of fluid into said conduit unit, another Conduit unit connected to the other ends of the cylinders sO that the slide will be moved down and the auxiliary frame restored to its initial position upon a flow of fluid into said other conduit unit, and means actuated upon arrival of the slide at the lower end upper ends of a stroke of predetermined length to control the flow of fluid into said first named and other Conduit units respectively.

7. A structure as in claim 6, in which said last named means includes means to alter the length of the stroke of the slide.

8. A structure as in claim 6, in which said last named cylinder is of greater cross sectional area than the first named cylinder.

9. A key seating machine comprising a frame having a fixed work supporting table thereon, said table having an opening therethrough, a slide below the table, an auxiliary frame in which the slide is mounted for vertical movement, means pivoting the auxiliary frame on the first named frame immediately below the table and opening therein, a tool holding bar fixed' on and-projecting upwardly from the slide: and through the opening, a tool mounted in the' bar and projecting from one side thereof in a plane at right angles to the axisof the pivot of the auxiliary frame, means to reciprocate the slide through a stroke of predetermined length and including a vertical. hydraulic cylinder mounted on the `first named frame beyond the slide on the `side ofthe pivot: axis opposite sadoneside of the, bar, a. piston rod depending from the cylinder, a link con- `necting said rod and slide, an armrigicl` with the auxiliary slide and projecting in a direction opposite to, said one Side of the bar, another hydrauli'o cylinder mounted on the first* named frame below said arm, a pisten rod upstanding from said other cylinder and connected` to the arm and a fluid conduit unit connectedxto' the bottom of. the.` first named cyIinder and the top of the other cylinder, another fluid conduit unit connected to the top of the first named cylinder and the bottom of the other cylinder, and means actuated upon arrival of the slide at the lower and upper ends of a stroke of predetermined length to control the flow of fluid into said first named and other conduit units respectively.

10. A structure as in claim 9, with adjustable stop means between the auxiliary frame and first named rame acting to limit upward movement of the arm by upward movement of the piston rod of said other cylinder and determining the normal position of the slide and tool bar relative to the perpendicular.

11. A machine for cutting key seats comprising a fixed frame and a work supporting table, an auxiliary rame pivoted for rocking movement relative to the fixed frame, a seat cutter mounted on the auxiliary frame forreciprocating movement adjacent Work on the table, a double acting hydraulic cylinder operatively connected to the cutter for imparting reciprocatory movement thereto, a double acting hydraulic cylinder operatively connected to the auxiliary frame for imparting rocking movement thereto, means to admit fluid pressure to one end of the first named cylinder to drive the cutter through its cutting stroke and to simultaneously admit like pressure `to one end of the second cylinder to rock the auxiliary frame in a direction to hold the cutter to the work during such cutting stroke, means to reverse the fluid pressure to the opposite ends respectively of the cylinders whereby to efiect the return stroke of the cutter and to simultaneously rock the auxiliary frame in a direction to retract the cutter from the work during such return stroke.

12. A machine for cutting key seats comprising a fixed frame and a work supporting table, an auxiliary frame pivoted for rocking movement relative' to the fixed frame, a slide mounted for reciprocatory movement in the auxiliary frame, a tool rod fixed to the slide and adapted with the movement of the slide to have reciprocatory movement adjacent work on the table, a post fixed to and projecting from one end of theauxiliary frame spaced from the slide, a 'projecting arm on the post, a guide sleeve on the outer end the cutter against the work during the cutting r stroke and to then rock the auxiliary frame in the opposite direction to pull the rod and cutter away from the work on the return stroke of the tool rod. i

. r 13. A machine for cutting key seats comprising a work holding table, a cutter arranged for reci-procatory movement adjacent work on the table; means to efiect such reciprocatory move ment, such means including a double acting hydraulic cylinder operatively connected with the cutter, a. source of fluid under pressure, a conduit *leading from said source to each end of the cylsolenoids, such means including electric circuits connected therewith, a normally open switch in each circuit, a slidable rod between the switches,

'alternately in di'erent directions, whereby when the cutter reaches its limit of movement in one direction the rod will engage and close one switch and when the cutter reaches its limit of movement in the opposite direction the rod will enage and close the other switch. a i

14. A device as in claim 13, and means to hold the rod stationary in switch closing position during travel of the cutter. i u

15; A device asin claim 13, and means to hold the rod stationary in switch closing position during travel of thecutter, such means including a s1eeve through which the rod travels and yielding stops interpos'ed between the s1eeve and rod and spaced apart substantially the distance of the length of trayel of the rod.

i THEODORE S. KLINE.

GEORGE KAY ROGER&