US1031605A

US1031605A - Sheet-metal-working machine.

Info

Publication number: US1031605A
Application number: US52645609A
Authority: US
Inventors: John F Wing
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-11-05
Filing date: 1909-11-05
Publication date: 1912-07-02
Anticipated expiration: 1929-07-02

Description

J. P. WING.

SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

1 ,031,605. Patented July 2, 1912.

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APPLICATION FILED NOV. 5, 1909.

Patented July 2, 1912.

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J. F. WING.

SHEET METAL WORKING MACHINE.

Patented July 2, 1912.

APPLICATION FILED NOV. 5, 1909. 1,031,605.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

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APPLICATION FILED NOV.5,1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909 Patented July 2, 1912.

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APPLICATION FILED NOV. 5, 1909.

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SHEET METAL WORKING MACHINE.

APPLICATION FILED NOV. 5, 1909.

1 ,O31,605. Patented July 2, 1912.

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Inventor We fiin 72 1 5 'flw CIJLUMIHA PLANoolzAPn 420.. WASHINGTON. n. c.

JOHN F. WING, OF MAYWOOD, ILLINOIS.

SHEET-METAL-WORKING MACHINE.

Application filed November 5, 1909.

Specification of Letters Patent.

Patented July 2, 1912.

Serial No. 526,456.

To all whom it may concern:

Be it known that I, JOHN F. WVING, a citizen of the United States, and resident of Maywood, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Sheet-Metal-WVorking Machines, of which the following is a specification, and which are illustrated in the accompanying drawings, thereof.

The invention relates to machines for working sheet metal, and particularly to those comprising punches and dies adapted to automatically out and fold articles from blank sheets of tin-plate and similar materials.

The object of the invention is to simplify and improve the construction of machines of this class; and the invention is exemplilied in the mechanism hereinafter described and illustrated in the accompanying drawings, in which Figure 1 shows in side elevation a sheet metal working machine embodying the invention; Figs. 2 and 3 are plan views of the same, Fig. 2 showing the forward end of the machine, and Fig. 3 its rear end; Fig. 4 is an end elevation of the same; Fig. 5 is a longitudinal sectional view taken on the line 5 5 of Fig. 2; Fig. 6 is a longitudinal vertical sectional view taken on the line 66 of Fig. 3; Fig. 7 is a longitudinal vertical sectional view taken on the line 77 of Fig. 3; Figs. 8, 9 and 10 are detail sectional views, theplanes of the sections being indicated by the lines 8S, 9-9 and 10-10,

forming a part respectively, on Figs. 1 and 3; Fig. 11 is similar to Fig. 10 but illustrates the parts in a different position of movement; Fig. 12 is a detail sectional view taken on the line 12 12 of Figs. 1 and 3; Fig. 13 is a detail sectional view taken on the line 1313 of Figs. 1, 2 and 5; Fig. 14 is a sectional view taken on the line let-14L of Figs. 1 and 2; Fig. 15 shows the central portion of the machine in perspective; Fig. 16 is a detail sectional view illustrating a form of feed mechanism employed upon the machine; Figs. 17, 18 and 19 illustrate a form of clutch employed upon the machine, Fig. 18 being a sectional View taken on the line 18-18 of Fig. 17; Fig. 20 shows in perspective an electrical switch employed upon the machine; Figs. 21 to 29, inclusive, illustrate the article produced by the machine in its several stages of development; Fig. 30 shows the stock from which the articles are produced; Fig. 31 is a detail sectional View taken on the line 3131 of Fig. 3; Fig. 32 is a perspective view of a form of frame which may be employed for receiving articles produced in the machine; Figs. 33 and 34 are perspective Views of certain dies shown in Fig. 6; and Figs. 35 and 36 are perspective views of certain dies shown in Fig. 7.

The machine illustrated is of a form adapted to produce tin car seals like that shown in Fig. 29 of the drawings, from blank sheets of tin-plate of rectangular shape. In the operation of the machine, a plurality of blanks, such, for example, as that shown at a in Fig. 21, and comprising a head 50 and a strap 51, are punched from a sheet of tin X, Fig. 30. These sheets of tin stock X are preferably of greater width than the length of the blank a, the stock being operated upon progressively from end to end, thus leaving a multilated sheet comprising a plurality of straps 52, connected at one end by a continuous band 53, which, upon being reversed, may be delivered to the machine a second time and a second series of blanks a punched therefrom, the straps 52 serving to form the straps 51 of the blanks and the heads 50 of the blanks being punched from the continuous band 53.

The machine comprises a plurality of dies which operate upon the blank a in succession, and feed mechanisms for advancing the stock from which the blanks are punched and for advancing the blanks upon the s-everal dies and delivering them in the form of completed car seals at the end of the machine. The punch for cutting the blanks from the stock is generally designated in the drawings by the letter A. The several dies are generally designated by the letters 13, C, D, E, F, G, H and I respectively. In Figs. 21 to 29 inclusive of the drawings, the result of the operation of the punch A and the several dies is illustrated, the blank cut by punch A being generally designated by the letter a as before described, and the form which this blank takes after its manipulation by each of the several dies B, C, D, E, F, G, H, and I, being shown at b, 0, cl, 6, f, g, h and 6 respectively. Apparatus for numbering the finished seals is shown in 0utline at J.

The machine preferably comprises a table, generally designated by the numeral 54. This table is supported in a horizontal position by

standards

55, 56 and 57, the standards, designated by the

numerals

55 and 56, being connected at the top by a bed plate 98 which extends beneath the table 54 adjacent one of its ends and serves for supporting the punch A. The punch A is carried by a pair of

uprights

62, 63, which rise from the bed plate 98 at each side of the table 54, and are connected at the top by a cross piece 97. The punch comprises a vertically movable punch head 58 and a cotiperat-ing stationary die-block 59, Figs. 4 and 5. The punch head 58 has a vertical sliding movement between

ways

60 and 61 provided upon the inner faces of the

standards

62, 63, these ways being of the form usually employed for the punch heads of metal punching machines. A drive shaft 64 is journaled in the

standards

62, 63, above the punch head 58, and an eccentric 65, formed upon the drive shaft 64 between the

standards

62, 63, is operatively connected to the punch head 58 in the usual manner by means of a link. A countershaft 94, jour naled in the

uprights

62, 63 in rear of the drive shaft 64 and having

gear connection

95, 96 therewith, whereby it turns at the same rate as the drive shaft but in the opposite direction, serves for transmitting motion to certain other parts of the machine.

The die-block 59 is supported by the

uprights

62, 63 above the table 54, the blanks a cut from the stock X by the movement of the punch head 58 into the die-block 59 being delivered onto the table 54 through the die aperture. For insuring the downward movement of the blanks a through the dieblock 59, a pair of electro-magnets 67, set into the table 54 through the bed plate 98, and having pole pieces located in l1ne with the aperture of the die-block 59, are preferably provided. As shown, these electromagnets are supported by a bracket- 68, secured to the underside of the bed plate 98, and their coils are in circuit with a battery, diagrammatically represented at 69 (Fig. 4), and with a switch, generally designated by the numeral 70, controlled by the punch head. The switch 70 is shown in detail in Fig. 20 of the drawings. It preferably comprises a pair of insulated terminal blocks 71, 72, mounted on the standard 62, adja cent the punch head 58. One of the terminal blocks, as 71, is of T-shape, and the other terminal block 72 is a two-part member comprising a base 73 fixed in position on the standard 62, and an L-shaped contactpiece 74, adjustably secured in position by means of set-screws 75, which enter the baseblock 73 through a slotted aperture 76 in the longer leg of the L-shaped contact-piece 74. A bridge-piece 77 is carried by the punch head 58 for connecting the terminals 71, 72. As shown, this bridge-piece is of spring metal and of flattened U-shape, one of the arms 7 8 of the U being in continuous sliding contact with the widened T-head of the terminal block 71, and the other arm 79 of the U being movable into and out of engagement with the shorter leg of the adjustable L-shaped member 74 of the terminal 72 by the movement of the punchhead.

A supplemental work-table 80 is provided for supporting the stock X as it is delivered to the punch A. As shown, this work-table is supported at one of its ends by the table 54 to which it is secured by set screws 99 (Fig. 5) and at the other end by a bracket 81 which rises from the bed-plate 98. The work-table carries feed mechanism generally designated by the. numeral 82 for advancing the work upon 'the punch A. The mechanism 82 comprises a cross head which is mounted in slideways 83 provided in the work-table 80, and carries a spring clamp 84 for gripping the work. A rack bar 85 is rigidly secured to the cross head of the feed mechanism, 82, and extends forwardly therefrom beneath the work table 80. For moving the rack bar 85, a rock shaft 86 extends transversely beneath the work table 80, and is journaled in bearing blocks 87, mounted on the bed plate 98. A crank arm 88, mounted on the rock shaft 86, carries a spring pawl 89 adapted to operatively engage the rack bar 85 when the rock shaft 86 turns in one direction. The rock shaft 86 is oscillated between each movement of the punch head 58. For this purpose, as shown, it is provided with a crank-arm 90, which is connected by a link 91 with a crank pin 92, adjustably mounted in a crank disk 93 formed upon the end of the countershaft 94. ported over the table 54 in rear of the dieblock 59 for receiving that which remains of the stock, as the mutilated sheet illustrated in Fig. 30, after it passes the punch A. The dies B, C, D, E, F, G, and H operate in succession upon the head 50 of the blank a (Fig. 21). For that purpose they are preferably located along one side of the table 54 at different distances from the punch A, as most clearly shown in Figs. 1 and 15, and feed mechanism having an intermittent movement is provided for causing the blanks a to travel along the table in front of the dies. The die I operates upon the strap portion 51 of the blank a adjacent its outer end, and for that purpose it is A table 100 (Figs. 5 and 15) is supciprocation of the feed bars, and stops 117 preferably located upon the other side of the table 54 from the dies just mentioned. As shown, it is located beyond the die H from the punch A.

The feed mechanism for moving the blanks a along the table 54 most desirably comprises a pair of

reciprocating bars

101 and 102, most clearly shown in Figs. 15 and 16. These bars preferably extend from a point below the die-block 59 of the punch A where the blanks a cut by the punch are received upon the table 54, to the rear end of the table 54 (Fig. 3) beyond the die 1 and the numbering mechanism J, where the blanks a are discharged by gravity in the form of finished seals (Fig. 29). As shown, the

bars

101, 102 are embedded in the surface of the table 54 by being laid into correspondingly formed grooves or slideways which extend along the table from end to end. Each of the bars has formed therein a longitudinal slot 103, and within this slot are mounted a plurality of spring pawls 104. The pawls 104 are mounted to swing in a vertical plane, each of them, as shown, being pivoted upon a pin 105 which is set transversely through the corresponding

bar

101, 102, and crosses the slot 103. The forward end of each pawl is urged upwardly to yieldingly project above the surface of the table 54, as by means of a spring 106, which reacts between the free end of the pawl and the floor of the slot 103. Preferably the pawls 104 are located at intervals along the

bars

101, 102, corresponding to the distance through which the blanks a are to be moved along the table 54 upon each reare provided for preventing a return movement of the blanks on the table. For reciprocating the feed bars 101, 102, each is provided with a lug 107 (Figs. 1 and 13) which extends below the table 54 through a slot 108. A rock shaft 109 extends transversely beneath the table 54 and is j ournaled in brackets 110 secured to the under side of the table. This rock shaft is preferably oscillated between each movement of the punch head 58. For that purpose a crank arm 111, located at one side of the table 54 and mounted upon the end of the rock shaft 109, is connected by a link 112 with a crank pin 113 adjustably mounted in a crank disk 114 formed upon the end of the drive shaft 64. Crank arms, as 115, are mounted on the rock shaft 109 below the table 54 and in line with each of the lugs 107. Each of these crank arms is operatively connected to one of the lugs 107 by an adjustable link 116.

The stops 117 for preventing backward movement of the blanks a on the table 54 are preferably arranged in a double row and at intervals throughout the length of the table corresponding to the spacing of the pawls 104 carried by the feed bars 101,

102. Most desirably these stops are vertically movable, being raised by contact therewith of the advancing blanks to permit the blanks to pass beneath them while they fall by gravity in rear of the blanks to prevent backward movement of them. As shown, two slightly different forms of the stops are employed upon the machine, the form illustrated in detail in Figs. 5, 15 and 16 being used throughout the greater portion of the length of the table 54, while another form illustrated in Figs. 1 and 3 is employed adjacent the rear end of the table 54 for controlling the movement of the blanks a as they pass the numbering mechanism J. The first-mentioned form comprises a pair of

bars

118, 119 which extend over the table 54 from its forward end to a point just in front of the numbering mechanism J. These bars are supported in a vertical plane by brackets, as 120, 121 located at intervals along the table 54. The

bars

118, 119 are attached to these brackets in such a way as to permit vertical movement of the bars, as by means of bolts 122, which pass through the bars and through vertically slotted apertures 123 in the brackets. The Weight of the

bars

118, 119 is received by the blanks a upon the table 54, and the stops 117 preferably take the form of gravity pawls 124 pivotally secured at one end to the corresponding bar, as 118, 119, and having their free ends resting upon the table 54. Adjacent the rear end of the table 54, the stops 117 take the form of shoulders formed upon bars 125, 126 (Figs. 1 and 3) which extend over the table 54 and are supported for movement ina vertical plane, after the manner of supporting the

bars

118, 119, by brackets, as 127, 128. In order to provide space for the numbering dies J between the feed bars 101, 102, one of these bars, as 102, is offset adjacent its rear end, as shown at 129, (Fig. 3). I

Pressure in addition to that placed upon the blanks a by the

bars

118, 119, and 125, 126, as the blanks move along the table, is applied at intervals by means of pressure bars 132, 133. These pressure bars, as shown, are attached to overhanging

brackets

134, 135 by screw bolts 136 which enter a slotted aperture 137 in the corresponding bracket. The weight of the pressure bars 132, 133 is supplemented by means of springs 138 which react between the bars adjacent each end and a cross arm 139 carried by the brackets, as 134, 135. Guides 140 which, as shown, take the form of angle irons applied to the surface of the table 54, extend along the table adjacent its margins for engaging the ends of the blanks a. The

brackets

134, 135 rise from the table 54 at a point outside of the guides 140. For supporting the dies B, C, D, E, F, G and H, a ledge or flange 130 preferably extends along one side of the table 54 throughout a portion of its length. As shown, the ledge or flange 130 is permanently secured to the table 54 adjacent its edge, as by screw bolts 131 (Fig. 8). The flange 130 also serves for supporting the brackets 120, to which the bar 118 is attached. A cam shaft 141 extends alongside of the table 54 for operating the dies B, C, D, E, F, G, H and I and the numbering apparatus J. As shown, this cam shaft is jo-urnaled in brackets 142 formed upon the flange plate 130, and it is rotated at the same rate as the drive shaft 64, by being operatively connected to the countershaft 94 through an intermediate vertical shaft 143 (Figs. 2 and which has bevel gear connection 144, 145 with the countershaft and the cam shaft.

The die B is a simple punch for punching an aperture in the blanks an adjacent the head 50, as shown at b, Fig. 22. It comprises a vertically-movable punch-head 146 and a cotiperating apertured die plate 147 '(Fig. 15). The punch head 146 is mounted in slideways 148 formed upon a bracket plate 149 secured to the flange plate 130, as by screw bolts 150, and the die plate 147 is mounted in the table 54 in such a way thatthe blanks a are moved over it by the feed bars 101, 102 and the coiiperating stops 117. For reciprocating the punch head 146 a lever 151 is pivotally attached at 152 to the end of the flange plate 130 (Fig. 2). This lever has a lug 153 formed upon one end. which enters a notch 154 in the side face of the punch head 146. The other end of the lever 151 carries a cam roller 155 which cooperates with a cam 156 (Fig: 13) mounted on the cam shaft 141. The cam roller 155 is held in cotiperating relation with the cam 156 by means of a spring 157 which bears downwardly on the lever 151, as by being coiled about a spindle 158 having a yoke 159 at one end which is attached to the lever 151, and having its other end slidingly mounted in a bracket plate 160 secured to the flange plate 130, as by a screw bolt 161. The spring 157 reacts between the under side of the bracket plate 160 and the yoke 159.

A feature of the seal illustrated in Fig. 29 of the drawings is a barbed tongue 162 inclosed within the head of the seal and formed upon the end of the blank a (Fig. 21). The function of the die C is to fold the tongue 162 to the position illustrated at 0, Fig. 23. To this end the die C is preferably located beyond the die B from the punch A in a position to engage the blank after it has been operated upon by the punch B during its movement along the table 54. As most clearly shown, in Fig. 13 of the drawings, the die C comprises a stationary shoe or anvil 163, adjustably supported over the table 54, as by a bracket 164, secured to the 65 flange plate 130. Preferably the bracket 1.64 extends between Ways 165 formed on the flange plate 130 and is secured in adjusted position by means of a clamping bolt 166 which enters the flange plate 130 through a vertically slotted opening 167 in the bracket.

The anvil 163 has a lateral projecting foot-piece 168, and the tongue 162 is folded upwardly over the foot piece 168 by means of a die-finger 169 which has in turn an upward and a forward movement through a slotted opening 170 in the table 54. As shown, the finger 169 is carried by a rocking member 171, pivotally secured at 172 to lugs 173 formed upon the lower edge of the flange plate 130. The rocking member 171 carries a cam-engaging roller 174, and this roller cotiperates with a cam 175 mounted on the cam shaft 141 for raising the diefinger 169. For permitting the forward movement of the die-finger 169 it has a sliding connection with the rocking member 171, as by means of bolts 176 which enter the rocking member 171 through a slot 177 in the finger. The finger 169 is normally retracted by a spring 178 which reacts between a bracket member 179 secured to one of the bearing blocks 142 of the cam shaft 141 (Fig. 2), and a plunger rod 180 connected to the finger. A cam 182 mounted on the cam shaft 141 serves for advancing the die finger 169, as by engaging an upwardly projecting shoe or heel 181 formed upon the finger at its rear end. Preferably the cams 17 5 and 182 are so proportioned and relatively disposed upon the cam shaft 141 that the 1 0 forward end of the die finger 169 is raised by the cam 175 prior to being advanced by the cam 182 and is maintained in the ele-- vated position until the cam 182 has passed the shoe 181 and the finger has been again 5 retracted by the spring 178. The die finger 169 thus serves to fold the tongue 162 over upon the projecting heel 168 of the anvil 163, and by pressing it against the concave face 168 of the anvil, gives it the curved 1 0 form illustrated in Fig. 23. When the die finger has been withdrawn from contact with the tongue, it is lowered tothe normal position illustrated in Fig. 13, by a spring 232 V which bears upwardly on the rear end of the 1 5 rocker member 171, as by being coiled about a plunger 233 pivotally connected to the rocker member and sliding through abracket 234, the said spring reacting between the bracket and a shoulder 235 formed 120 on the plunger.

The function of the die D is to change the blank a from the flat form illustrated in Figs. 21, 22 and 23 of the drawings, to the form shown at d (Fig. 24), wherein the 125 widened

portions

183 and 184 of the head 50 of the blank are provided with complementary flanges capable of being interfolded to form the side seams 236, 237 of the head of the seal (Fig. 29). Preferably this die also 139 strikes a pocket 185 in the part 183 of the blank (I. and depresses the tongue 162 from the inclined position shown at c in Fig. 23 to the position illustrated in Fig. 24.

As shown, the die D comprises a vertical movable punch head 186 supported over the table 54 and a cotiperating die plate 187 embedded in the table. These parts are most clearly illustrated in Figs. 14 and 15 of the drawings. The blank (1. is moved over the die plate 187 during its step by step advance along the table 54 after it passes the die C. The punch head 186 is preferably mounted for vertically sliding movement in slideways 188 formed in a bracket plate 189 which is permanently secured to the flange plate 130. The punch head 186 is operated from the cam shaft 141 through a lever 190. As shown, this lever has a rounded head 191 which projects through a slotted open-- ing 192 in the flange plate 130 into a pocket 193 provided in the punch head.

For pivotally supporting the lever 190, bearing blocks 194 are applied to the outer face of the flange plate 130 and are adiustably secured thereon by means of screw bolts 195 and set screws 196. The set screws 196 have a threaded bearing in an overhanging lip 197 provided upon the upper edge of the flange plate 130. and resist upward pressure on the bearing blocks 194. At the outer end of the lever 190 is mounted a cam-engaging roller 198 which cotiperates with a cam 199 mounted on the cam shaft 141 for depress ing the punch head 186. For raising the punch head 186 a spring 200 is preferably employed. As shown, this spring is coiled about a rod 201 having its lower end connected to the lever 190.while its upper end has a sliding bearing in a bracket arm 202 secured to the flange plate 130 by a screw bolt 203. The spring 200 reacts between the under side of the bracket arm 202 and a shoulder 204 formed on the rod 201.

The punch head 186 and die plate 187 have complementary formed die faces and each is preferably also provided with spring-

advanced strippers

205, 206. the

former being designed to prevent the blank a from being raised from the table 54 by the punch head 86 and the latter being adapted to raise the formed blank out of the depressions of the die plate 187 in order that its movement along the table 54 upon the next advance of the feed bars 101, 102 will not be interfered with.

The die E is most clearly illustrated in Figs. 6, 10 and 11 of the drawings. The function of this die is to fold the outer por tion 184 of the head 50 of the blank a over upon the inner portion 183 in the manner shown at c, Fig. 25. Preferably this die is generally similar in construction to that designated C and heretofore described, the anvil member about which the folding operation is performed being, however, in this instance, a movable member in order that it may be entered between the upstanding flanges formed on the portion 183 of the blank (1 by the die D after the blank has been positioned in front of this die by the movement of the feed bars 101, 102.

As shown. the anvil about which the folding of the blank 12 is accomplished by the die E takes the form of a hook-shaped member 207 pivotally supported at its higher end from a bracket 208 secured to the inside face of the flange plate 130. The movement of the member 207 is cont-rolled by a cam 212 mounted on the cam shaft 141.

A jointed link 209 is pivotally connected to the member 207 at' 210 and extends outwardly through a slotted opening 211 in the flange plate 130 to operatively engage this cam. Preferably the outer section 213 of the jointed link 209 is curved, and straddles the cam 212 to be moved thereby in opposite directions. As shown, cam-engaging

rollers

214, 215 are provided at the two ends of the curved section 213 of the link 209. These rollers are maintained in co6perative relation with the cam by means of a spring 216 which bears downwardly on the member 213. Most conyeniently the spring 216 is coiled about a rod 217 which has a sliding bearing in a bracket arm 218 carried by the flange plate 130 and is connected at its lower end to the member 213. A die finger 219 having in turn an upward and a forward movement is employed for folding the parts of the blank (1 about the hooked end of the anvil member 207 when the latter has been advanced to the position shown by dotted lines in Fig. 10. This die finger is similar in construction and operation to the die finger 169 employed for folding the barbed tongue 162, and will not be further described.

The die F is shown in detail in Figs. 6, 9, 33 and 34. The function of this die is to fold the upturned edges of the part 183 of the blank a over upon the side edges of the part 184 in the manner shown at f Fig. 26, to form the side seams of the chambered head of the seal. To this end the die F comprises yielding clamping members adapted to compress the

parts

183, 184, of the blank a together without the use of suiiicient force to distort them. and laterally movable die members for folding in the upturned edges of the part 183.

As shown, the clamping members comprise a yielding base block 220 set in the table 54 in such a position that the folded

parts

183, 184, of the blank a are moved into register with it by the advance of the feed bars 101, 102, after having passed the die E. The table 54 is provided with an aperture 221, Fig. 9, for receiving the block 220, and a bracket plate 222 is secured to