US1738312A

US1738312A - Heading machine

Info

Publication number: US1738312A
Application number: US249104A
Authority: US
Inventors: John E Pracny
Original assignee: MANVILLE E J MACHINE CO
Current assignee: E J MANVILLE MACHINE Co; MANVILLE E J MACHINE CO
Priority date: 1928-01-24
Filing date: 1928-01-24
Publication date: 1929-12-03
Anticipated expiration: 1946-12-03

Description

Dec 3, 1929.

J. E. PRACNY 1,738,312

HEADING MACHINE Filed Jan. 24, 1928 2 Sheets-Sheet 1 ZZ'V Dec. 3, 1929.

J. E. PRACNY 1,738,312

HEADING MACHINE Filed Jan. 24, 1928 2 Sheets-Sheet 2 of stock into them and the discharge of the completed blank from them, and are closed to hold the stock tightly clamped while the desired length is cut off and while the punch or punches are operating, are termed the open dies. These dies are moved transversely in the die pocket in one direction by the action of toggle links 4., the toggle links being straightened by a link actuated from The open dies are moved back and forth by this means a distance equal to that between the cutting die opening and the extruding die opening 16, both of which openings are 'in the fixed plate 17 of hardened steel set in the anvil plate 18. Back of the anviliplate is a filling block 19. The movable dies slide on hardened plates 20 fastened in the bottom of the die pocket, and are held against the anvil plate by retaining guides 21 that are attached to the die cap 2:2 which is, fastened down upon the top of the dies so as to-hold them on the bottom plates and against the anvil plate, as they are moved back and forth.

Any common type of stock feed may be eniployed, that illustrated having rolls 2?) which are intermittently rotated by mechanism'Q-l to feed the required length of stock into the machine, the stock being in the form of a continuous rod-or wire 25. lVith the open dies in feed position and slightly separated the feed rolls push the stock through aligned openings in the frame, the filling block 19,

anvil plateQO, the fixed die plate 17 and the opendies until the end of the stock is stopped by the gauge arm 26. This stop arm is oscillated, by theusual mechanism, into the path of the stock as it is fed, and back out of the way after the feed is completed. The open dies are then forced transversely in the die pocket by the toggles, which first close the dies so that they will tightly clamp the stock, and thenemove the dies so that a length of'the. clamped stock is cut off between the vback face of the open dies and the front face of the fixed cutting die 15, and carried into 7 line with the extruding die 16 and the punch 27, in which position the dies. and filling blocks arevery tightly clamped together between the thrust plate 9-8 and the plunger plate 9. With the dies held in this manner the'puneh comes forward and strikes th stock driving'it back so asto force the inner end of the stock into the extruding die 16,

the opening in which is somewhat smaller than the opening in the open dies, and thereby reducing the diameter of and extending the length of a section 29 of the inner end of the stoc r and at the same time upsetting and forming a head 30 on the outer end of the stock, Fig. 3. If it is a double blow machine as shown in the patent referred to, the first punch may merely initially shape the outer end of the stock and the second punch complete the head on the outer end of the stock.

In line with the extruding die is a pin 31 which is designed to limit the length of the stock that is extruded and subsequently drive the extruded section from the solid, extruding die. Back of this pin is a rod 32, the position and action of which is controlled by the lever 83 that is engaged by a stud ill on a slide 3:) which is reciprocated by a link actuated by a cam in the manner common in the class of closed die headers. lVhen the blank is headed by the punch and reduced and length ened by being driven into the extruding die, the backing pin is in position to be engaged by the inner end of the stock, as shown in Fig. 3. After this operation is completed the pin is driven forward so as to force the ex truded end of the blank from the extruding die into the open dies which then carry the blank into line with the incomin length of stock to be fed, as illustrated in 1* ig. 5. The subsequent feed of stock ejects the finished blank from the open dies and the cycle of operations is repeated.

By means of the combination of open dies, which clamp, sever and carry the stock into line with the punch, and solid extruding die, illustrated, a common header may be used to produce long blanks with heads at one end and with sections reduced for thread rolling at the other end without increasing the size of the machine or reducing its speed o l operation. lVith open dies the stock being clamped tightly the end is cut off more squarely than it is when out off at the face of a solid die so that the blanks are in better condition for having their inner ends reduced and extruded without excessive wear on the extruding die, and to have their outer ends properly headed by the punch, but it has been found impractical to extrude with open dies only for such dies tend to spread under the impact of the blows of the punch and leave fins on the extruded section. lVith a solid die only the stock has to be fed completely through it and cut off beyond its face, and the cut pieces transferred by carrying mechanism into line with the punch and then driven back lhe entire length of the solid die when headed and extruded, and subsequently pushed forward the whole length of the die in order to be ejected. which requires a greater distance between the face of the die and the punch carrying gate, thus necessitating an increase in the size of the machine, a greater travel for the punch and a longer movement for the ejccting or knock-out pin with a consequent loss of time, than when open dies are used.

The invention claimed is:

1. A heading machine having a die pocket solid. cutting die and a solid extruding die fixed in said pocket, and dies adapted to be opened and closed and moved transversely in the pocket, means for feeding stool; through the cutting die and movable dies, mechanism for moving said movable dies across the face of the cutting die and severing a length of the stock and carrying it into line with the extruding die, a reciprocating punch in line with the extruding die and adapted to strike the stock held by the movable dies and. drive its inner end into the extruding die, mechanism for ejecting the stock from the extruding die, and means for returning the movable dies into line with the cutting die and allowing the incoming stock to eject the completed blank from the movable dies.

2. it heading machine having a die pocket, a plate containing a cutting die and an extruding die fixed in said pocket, dies adapted to be opened and closed and moved transversely in the pocket, means for feeding stock through the cutting die and movable dies, mechanism for moving said movable dies across the face of the cutting die and severing a .1 en gth of the stock and carrying it into line with the extruding die, a reciprocating punch in line with the extruding die and adapted to strike the stock held by the movable dies and drive its inner end into the extruding die, mechanism for ejecting the stock from the extruding die, and means for returning the movable dies into line with the cutting die and allowing the incoming stoclr to eject the completed blank from the movable dies.

3. A heading machine having a die pocket, a solid cut-ting die and a solid extruding die fixed in said pocket, and dies adapted to be opened and closed and moved transversely in the pocket, intermittently rotated rolls for feeding stock through the cutting die and mova le tries, mechanism for moving said movable dies across the face of the cutting die and severing a length of the stock and carrying it into line with the extruding die, a reciprocating punch in line with the extrud die and adapted to strike the stock held by the movable dies and drive its inner end into the extruding die, mechanism for ejecting the stock from the extruding die, and means for returning the movable dies into line with the cutting die and allowing the incoming stock to eject the completed blank from the movable dies.

4:. A heading machine having a die pocket, a solid cutting die and a solid extruding die fired in said poclret, and dies adapted to be opened and closed and moved transversely in the pocket, means for feeding stock through the cutting die and movable dies, mechanism for moving said movable dies across the face of the cutting die and severing a length of the stock and carrying it into line with the ex. truding die, a reciprocating heading punch in line with the extruding die and adapted to strike the stock held by the movable dies and simultaneously head its outer end and drive its inner end into the extruding die, mechanism for ejecting the stock from the extruding die, and means for returning the movable dies into line with the cutting die and allowing the incoming stock to eject the headed and extruded stock from the movable dies.

5 A heading machine having a die pocket, a solid cutting die and a solid extruding die fixed in said pocket, and dies adapted to be opened and closed and moved transversely in the pocket, means for feeding stock through the cutting die and movable dies, mechanism for moving said movable dies across the face of the cutting die and severing a length of the fed stock and carrying it into line with the extruding die, a reci rocating punch in line with the extruding die and adapted to strike the stock carried by the movable dies and drive its inner end into the extruding die, a knock-out pin and mechanism for causing the knockout pin to push the end of the stock from the extruding die, and means for returning the movable dies into line with the cutting die and allowing the incoming stock to eject the completed blank from the movable dies.

6. A heading machine having a die pocket, a cutting die and an extruding die fixed in said pocket, and dies adapted to be moved transversely in the pocket from the cutting die to the extruding die, means for feeding stock through the cutting die and movable dies, mechanism for moving said movable dies across the face of the cutting die and severing a length of the stock and carrying it into line with the extruding die, a reciprocating punch in line with the extruding die and adapted to drive the inner end of the stock into the extruding die, mechanism for ejecting the stock from the extruding die, and means for returning the movable dies into line with the cutting die.

7. A heading machine having a die pocket, a solid extruding die fixed in said pocket, and dies adapted to be opened and closed and moved transversely in the pocket means for feeding stock through the movable dies,mechanism'for causing said movable dies to carry a length of stock into line with the extruding die, a reciprocating punch in line with the extruding die and adapted to drive the inner end of the stock into the extruding die, and mechanism for ejecting the stock from the extruding die and from the movable dies.

JOHN E. PRACNYi