US2575827A

US2575827A - Spring bending machine

Info

Publication number: US2575827A
Application number: US204647A
Authority: US
Inventors: Miklic Louis
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-01-05
Filing date: 1951-01-05
Publication date: 1951-11-20
Anticipated expiration: 1968-11-20

Description

Nov. 20, 1951 L. MlKLlC 2,575,827

SPRING BENDING MACHINE Filed Jan. 5, 1951 5 Sheets-Sheet l INVENTOR.

Nov. 20, 1951 L. MlKLlC 2,575,827

SPRING BENDING MACHINE Filed Jan. 5, 1951 3 Sheets-Sheet 2 f M L IN VEN TOR.

Nov. 20, 195] Filed Jan. 5, 1951 L. MlKLlC SPRING BENDING MACHINE 3 Sheets -Sheet s INVENTOR.

Patented Nov. 20, 1951 UNITED STATES PATENT OFFICE SPRING BENDING MACHINE Louis Miklic, Birmingham, Ala.

Application January 5, 1951, Serial No. 204,647

2 Claims. (Cl. 266-6) This invention relates to a spring banding machine. It has for its main objects to provide such a machine that will be highly efficient for the purpose intended, simple in structure, comparatively cheap to manufacture, easy to operate, andextremely durable.

The machine is especially intended for use in bending the type of springs used on automobiles and trucks and similar springs.

Other objects and advantages will appear from the drawings and description.

By referring generally to the drawings, a part of this application, it will be observed that Fig. 1 is a top plan view of the assembled machine with a spring leaf in position for being bent and formed; Fig. 2 is a view similar to Fig. 1 but showing the spring leaf in bent condition for being so formed; Fig. 3 is an end view of the assembled machine in two positions, the full lines showing the machine at the start of an operation and the broken lines showing the machine as it appears when some of its parts are tilted for use in carrying out the operation; Fig. 4 is an enlarged detail front view of the main air control valve of the machine; Fig. 5 is a top view of Fig. 4; Fig. 6 is a detail edge view of part of the link chains used in the machine structure; and Fig. 7 is a top view of Fig. 6.

Similar reference numerals refer to similar parts throughout the several views.

Referring to the drawings in detail it Will be seen that the assembled machine comprises an open top tank I that in use is nearly filled with spring tempering oil to line 45. Mounted on the top of the tank there is a frame 2 attached on shaft 3 and rockable in bearings 4 and 5. Two cylinders 6 and 1 are mounted upon the frame. A third cylinder 8 is supported on the lower back center portion of the tank. A regular three way air valve 9 is mounted in front of the tank that controls compressed air from a source (not shown) through a pipe In. An air pipe ll leads from the valve to cylinders 8 and I through a cross pipe 12 connected to the ends I3 and I4 of the cylinders. A slidable frame i5 is mounted upon the rockable frame. The pistons of the cylinders carried on the rockable frame have their ends 16 and I! attached to the slidable frame. A flat link chain 18 is attached by its ends l9 and 20 to the ends 2| and 22 of the slidable frame. The center portion 23 of the link chain is attached'to a rod 24 inserted through a small bracket 25 on the slidable frame. A coil spring 26 is mounted upon the upper portion of the rod between the small bracket and an ad justing washer and nut 21 on the end of the rod. A cross member 28 of the rockable frame supports an adjustable scissors-type jack 39 and two adjustable supports 30 and 3| for a curved strip 32 attached at 33 and 34 to the frame. A linktype chain 35 is attached to the curved strip. A plurality of rods 36 are attached to and extend from the cross member 28 of the rockable frame. An air line 31 leads from the air valve 9 to the

lower ends

38 and 39 of the cylinders mounted upon the rockable frame and the upper end '40 of the cylinder mounted at the rear of the tank. A stop member 4! is attached for contact with the bottom of the tank. The air valve is controlled by its handle 42 to regulate the flow of compressed air to and from the cylinders.

In operating the machine it is first necessary to adjust the link chain 35 to the desired curve. Then a red hot spring leaf 43 is placed in position as shown in Fig. 1 with the rockable frame assembly in its up position as shown by full lines in Figs. 1 and 3. Then the air is turned on and into the cylinders mounted on the rockable frame that has the ends of the link chain l8 attached thereto, thereby causing the chain Hi to make contact with the spring leaf 43 and bend it to the shape thereof shown in Fig. 2. When this operation occurs the rockable frame with the hot spring leaf supported thereon tilts by gravity to the position shown by the broken lines in Fig. 3.

In this position the hot spring leaf is submerged in the oil in the tank and is there retained for the required time for tempering thereof. Then the air pressure is changed by operating the air valve'to cause air through pipe line 31 to enter the

lower ends

38 and 39 of the cylinders on the rockable frame and the upper end 49 of the cylinder 8 at the rear of the tank thereby causing the rockable frame to return to its up position as plainly shown by the full lines in Fig. 3. The released air from the cylinders 6 and l escapes through the valve 9 and pipe 44, and through bottom end of cylinder 8.

From the foregoing it will appear that in order to use the machine a red hot spring leaf indi cated by 43 is placed in the position as shown by its full lines in Fig. 1, then air is turned into cylinders 6 and I at i 3 and I4 causing the slidable frame IE to move to the position shown in Fig. 2 causing the spring leaf to be held between the chains I8 and 35. The shift of weight causes the frame assembly to tilt and submerge the hot spring in the oil where it is held for some time for cooling. Then the air valve 9 is operated to cause the compressed air to enter cylinders 6 and l at 38 and 39 and cylinder 8 at 40, causing the frame assembly to return to its up or approximately level position, thus releasing the bent spring leaf for easy removal. ,In this movement the air in the cylinders that caused the tilting movement is re1eased through line H into-the 3 valve Sand out through pipe 44, the valve being a regular three-way valve adapted for manual operation by its handle 42 to accomplish control of the compressed air leading into it through pipe I 0.

The various parts of the machine maybe made of any'material suitable for the purpose, but I prefer to use metal, and flexible air lines where necessary. Also the parts may be made in different sizes and capacities, depending on where and how to be used, with especial reference to the size of spring leaves being produced. I

While I have shown and described the preferred embodiment of my invention, I do not wish to limit same to the exact sizes and details of structure, but reserve the right to make all modifications and changes so long as they remain within the scope of the invention and the following claims.

Having described my invention I claim:

a 1. A spring bending machine of the char-.

acter described comprising, a main approximately square tank with an open top and adapted for retaining spring tempering oil, a frame mounted rockable upon the top of two opposite edges of the :walls of the tank, two elongated cylinders mounted upon said rockable frame, a slidable frame mounted upon said rockable frame, the piston rods of said cylinders attached to said slidable frame, a cylinder attached in upright position adjacent the middle of one Wall of the tank with the lower end of the cylinder held rockable by its connection, the piston rods of the, cylinders on the frame being connected to the slidable frame and the piston rod of the upright cylinder being connected to the rockable frame, a curved member supported on the lower end portion of the rockable frame, said curved member having means to regulate the curve thereof, said means consisting of a scissors-type jack and adjusting bolts or screws, a flat link chain attached by its ends to said curved memher, a similarflat link chain attached by its ends to said slidable frame, a plurality of supporting rods attached to the-said lower end portion of the rockable frame, said rods being adapted to support a hot spring leaf in position for bending and forming thereof; a three-Way air valve supported adjacent the wall of the tank near the lower end portion of the rockable frame, air pipesleading from said valve to the two cylinders on the rockable frame and being adapted to convey compressed air from an independent source through said valve to said two cylinders and operate the pistons thereof in outward movement to thus slide the slidable frame on the rockable frame and clamp a hot spring leaf between the said chain attached to the slidable frame and the chain attached to the rockable frame and by weight of the shiftedparts cause the hot spring leaf to be submerged in chin the tank; additional air pipes leading from said valve to the top end of said upright cylinder and the rod ends of said two cylinders on the rockable frame, said pipes being adapted to convey compressed air into said cylinders to cause them by their piston rod connections to tempering oil contained therein, said tank having an open top and formed approximately square "in the tank, two cylinders mounted upon said rockable frame, a slidable frame mounted upon said rockable frame. the piston rods of said cylinders attached to said slidable frame and adapted to slide same toward the front of the tank and then retract same, a cylinder attached in upright position adjacent the middle portion of the back wall of the tank with the lower end of the cylinder held rockable by its connection, the piston rods of a the cylinders on the rockable frame being connected to the slid-j able frame and the piston rod of the upright cylinder being connected to. the rear edge of the rockable frame, a curved metalsubstantially flat member supported on the end portion of oil; said firstmentioned air tubes being adapted,

to convey released air from said two cylinders" return the rockable and slidable frames to positions occupied before the spring leaf was submerged in oil; said first mentioned air pipes being adapted to convey released air from said two cylinders 'on the rockable fram'e'through said valve and thereby be exhausted.

2. A spring bending machine of the character described comprising,-a main tank and'spring the rockable frame near the front wall of the tank, said curved member having means to regulate the degree of the curve thereof, said means consisting of a scissors-type jack and adjusting bolts and screws, a fiat link chainattached'by its ends to said curved member, a similar' flat link chain attached by its ends to said slidable frame, a plurality of supporting rods attached to the cross portion of the rock able frame near the front wall of the tank, said rods being adapted for supporting a hot metal spring leaf in position for bending and forming thereof between said flat link chains;.

a three-way air valve supported near the front. wall of the tank, said valve having a handle,

for manual operation thereof, metal and rubber air supply tubes leading from said valve to the two cylinders on the rockable frame and being adapted to convey compressed air from an independent source through said valve to said two" cylinders and operate the pistons thereof in"- frame on the rockable frame toward the front wall of the tank and clamp a hot metal spring leaf between the said chain attached to the outward movement to thus slide the slidable slidable frame and the adjustable chain attached to the said curved metal member and by weight of the shifted parts cause same with the hot spring leaf thereon to be submerged in the oil in the tank; additional metal and rubber air supply tubes leading from said valve to the top end of said upright cylinder and the rod ends of the said two cylinders on the rockable frame, said tubes being adapted to convey compressed air into said cylinders and cause them by their piston rod connections to return the rockable and slidableframes to positions occupied before the spring leaf thereon was submerged in the LOUIS MIKLIC.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date