US1794143A

US1794143A - Valve-making machine

Info

Publication number: US1794143A
Application number: US298108A
Authority: US
Inventors: Lewis C Broecker
Original assignee: Firestone Steel Products Co
Current assignee: Firestone Steel Products Co
Priority date: 1928-08-07
Filing date: 1928-08-07
Publication date: 1931-02-24
Anticipated expiration: 1948-02-24

Description

Feb. 24, 1931. L. c. BROECKER VALVE MAKING MACHINE Filed Aug. '7, 1928 4 Sheets-Sheet 1 INVENTOR LEWHS C.BROE'QKER.,

ATTORNEYS.

Feb. 24, 1931. I c, BRQECKER I 1,794,143

VALVE MAKING MACHINE Filed Aug. 7, 192a 4sne'ets-sheet 2 INVENTOR. LEWIS C BROEQKER.

A TTORNEYJ,

Feb. 24, 1931. L. c. BROECKER 1,794,143

VALVE MAKING MACHINE Filed Aug. 7', 1928 4 Sheets-Sheet 3 I INVENTOR. Law/s 0.52050 mm,

BY 3%WZW Feb. 24, 1931. L. c; BROECKER VALVE MAKING MACH INE 4 Sheets-Sheet 4 Filed Aug. 7, 192a w a my y w z H W m 7/%//// I.

\\I III [I A TTORNEYJ.

Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE LEWIS C. BROECKER, OF AKRON, OHIO, ASSIGNOR TO THE FIRESTONE STEEL PRODUCTS COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO VALVE-MAKING MACHINE Application filed August 7,

the stem and stamping a name on the flat side.

machine for effectively and efficiently carrying out the above operations without the intervention of a human agency.

The foregoing and other objects are obtained by the device illustrated in the accompanying drawings and described below. It is to be understood that the device is not limited to the specific form thereof disclosed herein.

Of the accompanying drawings, I

Figure 1 is a front elevation of a machine embodying the principles of the invention;

Figure 2 is a side elevation thereof;

Figure 3 is an enlarged scale detailed plan of the table portion of the apparatus;

Figure 4 is an enlarged scale front elevation thereof;

Figure 5 is an enlarged scale side elevation thereof;

Figure 6 is a still further enlarged scale: vertical sectional detail of the valve seat up setting operation;

Figure '7 is a vertical sectional detail of the valve stem shearing operation;

Figure 8 is a plan detail of the stamping operation;

Figure 9 is an end 'elevation'al detail there- .of; and

ated by crank 13 which is rotated by motor 14 through suitable reduction gears. Projecting from the lower end of crosshead12 is a vertical shaft 15 carrying a bracket 16 to be reciprocated by the crosshead. One side of the bracket carries an arcuately disposed an air jet 23. The object of the invention is to devise a 1928; Serial No. 298,108.

series of devices, namely, an air jet 17, a depth-sounding tool 18, seat upsetting punches 19 and 20, and a final seat-shaping punch 21. The other side of the bracket carries an elongated shearing punch 22 and A table 24 supported on frame 10 vertically below crosshead 12 carries thereon an indexing Wheel 25 having a series of equidistantly spaced notches about its outer periphery. The wheel 25 preferably carries a correspondingly notched hardened steel plate 26 about its upper rim for supporting the base flanges 27 of valve stems 28 placed in the notch-es 29 of the indexing wheel. As wheel 25 is rotated the valve stems are maintained in the notches by means of a guard band 30. An arcuate bracket 31'is' formed with a series of apertures 32 having hardened bushings 33 provided therein for respectively aligning the devices 18, 19, 20 and QIWi-t'h valve stems carried in notches 29 of the indexing wheel. A spring-pressed finger 34 is attached to bracket 31 for ejecting each valve stem from its notch as it passes from the punching operation. v

The indexing wheel is periodically rotated through an are equal to the distance between the notches by means of an arm 35 reciprocated by cam 36 mounted on shaft 37 and rotated from the shaft of crank 13 through bevelled gears 38. One end of arm 35 is forcibly held against cam 36 by spring-pressed block 39 and the other end of the arm is pro vided with a pin 10 engageable successively in notches 29 and yieldingly held therein by 43 carried on arm 35. Pin 40 is maintained in notch 29 during the forward movement of arm 35 to rotate Wheel 25 in the direction shown in the arrow in Figure 3. Upon the backward movement of arm 35 the wheel is held against rotation by the punches which are then in their downward position and the end of the arm carrying pin 40 is moved radially away from wheel 25 in order to disengage pin 40 from the notch 29, this movement being, eflected by a lever 44 operated by lever 45 which is engaged by arm 46 in turn oscillated by connecting rod l? which is reciprocated by crank 18 affixed to shaft 3'5. Arm-35 is guided and aligned by means of a guide block 49.

Positioned on table 10 vertically below shearing punch 22 is support 50 carrying a pair of shear plates '51 cooperating with punch 22 to shear side on the valve stems. The latter are pro erly positionedon )lates 51 after dropping from the indexin l. l u; t1

wheel, by means of a reciprocable forked member 52 sliding across plates 51 and engeable with the base flange 2'? the in ve stem as shown in detail in Figure 10.

the valve stem is positioned. on plates 51 with its base flange in abutment with a stop 53 and before sh *lCll 2:2 descends, member 52 is retracted, member being actuated by arm 4 6 reciprocated by connecting rod 47 as mentioned above.

Chips formed by thepunching operation are blown from the apparatus by means of air jet 28 connected to air alve 5 1 by means of flexible hose and whose operation is timed by cam 56 affixed to shaft 37. A pair of oppositely, rotatable circulardies 51 and.

58 are mounted below the shearing mechannism and are adapted toengage the valve stem that has been forced through shear plates 51 into a guide block and between dies 5'? and 58. The latter are rotated from shaft 37 through

gears

60, 61, 62, 63 and 64: and are timed so that letters or numbers 65 embossed on the'dies will pass across the llat surface of the valve stem, stamping the same and ejecting the stem from the apparatus.

Depth-sounding tool 18 is reciprocably mounted in bracket 16 and yieldingly neld in its downward position. It serves as a safety device and in the event that the bore of valve stem 28 is not deeply enough drilled, depthsounding tool 18 will be forced upwardly with respect to bracket 16 and-will operate. electrical contactswitch 66 to close circuit and energize solenoid 67 releasing a springpressed latch 68 for operating clutch rod 69 to stop the operation of the machine. Thus punch 19 is safeguarded against damage by being forced into a valve stem which has been accidentally given too shallow a bore. Furthermore, any obstruction in the here will. operate tool 18 to stop the machine. A hand lever 70 mounted on the front portion of table 2% is also adapted to operate suitable contacts for energizing the solenoid to stop the machine, only a slight touch by the operator being necessary to actuate lever TO. An in clined trough-like guide 71 serves as a gravity conveyor for feeding valve stems to the indexing wheel and also serves as a means for holding a number of valve stems in reserve to be operated upon by the machine. This guide has been removed from Figures 1 and in order not to obscure the construction of After 1 the mechanism appearing behind the same.

In the operation of the machine a number of partly finished valve stems formed with external threads and with a bore having a shoulder adjacent one end thereof, are placed in guide 71and are automatically successively positioned in notches 29 as the index wheel is periodically rotated. As a valve stem comes into position under air jet 1?, crosshead 12 descends and forces bracket 16 downwardly to seal'air jet 1'? against the base flange of the valve stem and a blast of air is forced through the bore of the valve stem to blow out any chips that may have lodged therein. As

wheel 26 is again indexed the valve stem is brought beneath depth-sounding tool 18 which is then inserted into the bore to test the depth of the shoulder. If the depth of the bore tothe shoulder istoo shallow or islobstructed, tool 18 will trip electrical contacts 66 to stop the machine, but if the bore is of sutlicient.v depth the operation continues. Upon the next indexing operation the valve stem is brought under punch 19 which is then forced downwardly to partially upset a seat in the bore of the valve stem. After punch 19 is retracted by the upward movement of the crosshead the, wheel is again indexed and punch 20 is forcedinto. the bore of the stem to further upset the seat. .The operation of forming the seat is best illustrated in Figure 6 of the drawings. Then wheel 26 is agaln indexed-and the next stroke of bracket 16 forces punch 21 into the bore for the linal force the valve stem through plates 50 shear- 7 ing ed a flat surface on-each side of the valve stem and forcmg the stem downwardly between and into engagement with circular dies 57 and 58. I As the dies rotate and stamp a name, number of other indicia upon the fiat side of the valve stem the latter is projected from the machine. and drops into a sultable container (not shown).

Modifications of the invention may be re-f sorted to Without departing from the spirit thereof or the scope of the appended claims.

What is claimed is: i

1. In a valve making machine, a rotatable indexing wheel formed witha series of equally spaced notches about its outer periphery, means for intermittently rotating said wheel through a distance equal to the space hetween said notches, means for feeding a series of valve stems successively into said notches as said Wheel is rotated, a series of tools adapted to perform successive operations upon the series of valve stems, said tools being positioned to be aligned with successive valve stems as said Wheel is rotated, a shear ing punch and a pair of shear plates cooperating to form a flat side on said valve stems, means for successively removing the valve stems from said indexing Wheel and positioning same upon said shear plates, and a pair of rotatable stamping dies mounted below said plates for stampin indicia upon the flat side of a valve stem after the latter is forced through the shear plates by the shearing punch.

nation of a pair of shear plates, means for successively feeding and positioning valve stems on said shear plates, a reciprocable shearing punch for forcing said valve stems through the shear plates to form flattened sides on the valve stems, and a pair of rotatable stamping dies positioned below said,

shear plates and adapted successively to engage the fiattened sides of the valve stemsas the latter are forced through the plate by the shearing punch.

3. In a machine for making valve stems, a reciprocable punch for engaging a shoulder formed in the bore of said valve stems for upsetting the metal thereof to form a valve seat, and a safety device for stopping said machine if the bore of said valve stem is too small or too shallow, said safety device including a spring-pressed rod adapted to be inserted in the bore of said valve stem in advance of the punching operation and electrical means for stopping the machine if the rod does not project to a sufhcient depth Within the bore.

4. A valve stem finishing machine comprising in combination, means for successively cleaning the bores of a series of valve stems, means for testing the depth of the bore of each valve stem, means for upsetting a valve seat Within said bore, means for forming a fiat side on the exterior of said valve stem, means for stamping indicia upon said flat side, means for conveying the valve stems into successive operative positions for the operation of each of the above-mentioned means, and means for simultaneously operating each of the abovementioned means.

5. A valve stem finishing machine comprising in combination, means for successively cleaning the cores of a series of valve stems, means for upsetting a valve seat Within said bore, means for forming a flat side on the exterior of said valve stem, means for stamping indicia upon said fiat side, means for conveying the valve stems into successive operative positions for the operation of each of the above-mentioned means, and means for sifed into said machine, means for upsetting a valve seat Within said bore, means for formmg a fiat sideaon the exterior of said valve stem, means for stamping indicia upon said 2. In a valve making machine, the comblfiat side, means for conveying the valve stems into successive operative positions for the operation of each of the above-mentioned means, and means for simultaneously operating each of the above-mentioned means.

8. A valve stem finishing machine comprising in combination, means forv upsetting a valve seat Within the bore of a series of valve stems fed into the machine, means for forming a flat side on the exterior of said valve stem, means for stamping indicia upon said flat side, means for conveying the valve stems into successive operative positions for the operation of each of the above-mentioned means,

and means for simultaneously operating each of the above-mentioned means.

In Witness whereof I have hereunto affixed my signature this 16th day of July, 1928.

LEl/VIS C. BROECKER.