US2560189A

US2560189A - Coil forming press

Info

Publication number: US2560189A
Authority: US
Publication date: 1951-07-10
Anticipated expiration: 1968-07-10

Description

July 10, 1951 w. s. RQYSTON con. FORMING PRESS Filed March 21, 1947 jin emar Patented July 10, 1951 UNITED STATES PATENT OFFICE Worlcy GrantRoyston, Logan, W. Va. Application March 21, 1947, Serial No. 736,369

This invention relates to a coil-forming press.

In the winding of armatures and stators for rotary electrical machinery, as well as in the making of transformer coils, it is usually desirable to have the coil of square cross-section. The coil must be fitted in the slots in the armature or stator laminations, which slots are usually of substantially rectangular cross-section, and the coils are designed to fit with close'tolerances. This is particularly the case where several coil sections are to be placed in the same slot.

The object of the present invention is to provide a coil-forming press which will apply pressure. to a coil section and form same into a square cross-section.

It is another object of the present invention to provide a coil-forming press which will apply pressure to the sides of a coil simultaneously in four directions to form same into a perfect square.v 7

It is a further object of the present invention to provide a coil-forming press into .which'the coil may be readily inserted and from which they may be readily'removed so as to facilitate the forming of coils on the mass production basis.

Still other objects, advantages, and-improvements will become apparent from the following specification, taken in connection with the accompanying drawings, in which:

Figure 1 is a fragmentary side elevational view, partially in section, of a coil-forming press according to the present invention;

Figure 2 is a top plan view, partly broken away;

Figure 3 is a perspective view of a coil formed in the coil-forming press according to the present invention.

Referring now to the drawings in detail, and to Figure 1 in particular, the coil-forming press is here shown as comprised principally of a body In supported on a standard I I. The body In has an inclined top face 12 and a downwardly and inwardly inclined face 13 at right angles thereto. Side plates l4l4 are mounted on the body by any suitable means, such as screws (not numbered). A plate [5 is adapted to slide along the inclined top face I2 of the body I0, this plate being biased upwardly by a coil compression spring [6. The spring H5 at its lower end abuts an end plate I! which is secured between the side plates l4l4 in any suitable manner, as by screws (not numbered). A plate I8 is positioned over the plate l5 and at its outer end has an upturned toe flange I9. The plate I8 is adjustable along the inclined top face l2 of the body by a screw 22 which'has its head 20 3 Claims. (Cl. 100-70) mounted in a shallow notch in the lower edge of the plate and secured in position by a strip 2| fixed to the lower edge of the plate in any suitable manner, as by brazing or welding. The screw 22 is mounted in a threaded hole in the end plate Hand has a knob 23 at its outer end. Over the top of the adjustable plate it there is mounted a guide plate 24 which is held in place in any suitable manner, as by screws (not numbered) extending through the side plates I4I4.

A forming head 25 has a shank 35 which extends along the rear face of the body I0, this shank preferably being of the same width as the body and being constrained to vertical movement by the rear face of the body, a back plate 34, and the side plates l4l4 to which the back plate is secured in any suitable manner, as by screws (not numbered). The forming head 25 has an inclined top face 26, which is parallel to the inclined topface I2 of the body in, and an inclined face 21 which is downwardly and inwardly inclined, at right angles to the top face 26 and parallel to the upwardly inclined top face l3 of the body ID. A plate 28 having an upturned toe flange 29 is mounted on the inclined surface 26 of the forming head. The plate 28 is constrained to sliding movement by a guide plate so which is mounted on the forming head 25 in parallel relationship to the inclined surface 26 thereof and held in place by side plates 3l3l, suitable screws (not numbered) extending through the side plates and into the forming head and the guide plate. A coil compression spring 32 biases the plate 28 downwardly, this spring being interposed between the upper edge of the plate and an end plate 33 which is likewise held in position by suitable screws (not numbered) extending through the side plates 3|-3I.

A pair of parallel arms 36-36 extend downwardly and rearwardly from the body It). On these parallel arms there is pivoted at its outer end a foot or hand treadle 39 by a bolt 37 having a nut 38 thereon. The lower end of the shank 35 is bifurcated and fits on both sides of the treadle 39. The treadle 39 has a longitudinal slot 40 therein and a pivot pin 4! is fitted through the lower bifurcated end of the shank 35 and the slot 40, this slot 40 allowing for differences in the direction of motion of the pivot pin ti whether considered as a point on the shank 35 having straight line vertical motion, or as a point on the treadle 39 having rotary motion about the pivot bolt 31.

In operation, the coil to be formed consists generally of a round bundle of conductors held 3 together temporarily by light metal clips or by tapes. This bundle of wires is laid on the bottom plate and against the upturned flange l9 on the adjustable plate l8. Initially, the inclined surface 21 of the forming head 25 is above and some distance to the right (Figure 1), of the parallel inclined surface l3 of the body II]. The slidable plate 15 is maintained in contact with the inclined surface 2! of the forming head by the spring 16, this plate forming the support for the bottom of the coil. The operator grasps the coil at its ends in both hands and forces the same against the upturned flange 29 on the slidable plate 28, forcing the latter upwardly. After the coil is in position, the operator presses downwardly on the treadle 39. The slidable 'p1ate 28 moves inwardly over the top of the coil and the upturned flange 29 on this plate abuts the upturned flange 19 on the adjustable plate l8. Further downward movement of the forming head 25 will then compress the coil, both along the axis perpendicular to the slidable plates [5 and .28, and along the axis at right angles thereto, perpendicular to the upturned flanges I9 and 29 on the slidable plates l8 and 28, respectively. The relative position of the adjustable plate l8 may be set by the adjusting screw '22 to determine the stage in the travel of the forming head 25 at which transverse compression takes place, and hence the thickness of the formed coil.

It will be apparent that the form of the invention herein described and illustrated is to be taken as the preferred embodiment of same, and that various changes in the shape, size and arrangement of parts may be made without departing from the spirit of the invention as defined in the appended claims.

Having described my invention, what I claim as new and useful and desire to secure by Letters Patent of the United States is:

1. In a coil-forming press, a body having an inclined surface, a forming head having an inclined surface parallel to said first-mentioned inclined surface, a spring-biased plate on said body at right angles to said inclined surface thereon, a spring-biased plate on said forming head at right angles to the inclined surface thereon, and means for simultaneously moving said inclined surfaces and said slidable plates toward each 1 other, thereby constricting the space between said inclined surfaces and said slidable plates.

2. In a coil-forming press, a body having an inclined surface, an adjustable plate mounted on said body and having an upturned flange thereon disposed parallel to the inclined surface, a forming head having an inclined surface disposed parallel to the inclined surface on the body, a spring-biased plate on said body at right angles to said;inclined surface thereof and yieldably abutting the inclined surface on said forming head, a spring-biased plate on said forming head 'at right angles to the inclined surface thereon andyieldably abutting the upturned flange on the adjustable plate, and means for simultaneously moving the inclined surfaces and the springbiased plates .toward each other, thereby constricting the spac'ebetween said spring-biased plates.

3. In a coil-forming press, a body having an inclined surface, an adjustable plate mounted on said body and having an upturned flange'thereon disposed parallel to the inclined surface, a forming head having an inclined surface disposed parallel to the inclined surface on the body, a spring-biased plate on said body at right angles to said inclined surface thereon and yieldably abutting the inclined surface on the forming head, a spring-biased plate on said forming head at right angles to the inclined surface thereon and yieldably abutting the upturned flange on said adjustable plate, and means for simultaneously moving said inclined surfaces and springbiased plates toward each other, thereby constricting the space between said inclined surfaces on the body and the forming head and between said spring-biased plates.

WORLEY GRANT ROYSTON.

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

UNITED STATES PATENTS