JP2521503B2 - Material feeding mechanism of press machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic feeding mechanism for a strip material in a press machine, which is used for forming parts by a press machine,
The present invention relates to a material feeding mechanism having a structure to be used as a pair with a press die in assembly processing and the like.

-Prior Art-Mechanical feeders and air feeders of various structures are known as automatic feeding mechanisms for strip materials in press machines. These conventional feeding mechanisms are attached to a press machine, and for example, in the case of a mechanical feeder, they are provided with a structure that operates by mechanically transmitting power from a cam shaft of the press machine at a predetermined timing. In the case of an air feeder, compressed air is used as a drive source, and a structure is provided that operates by receiving a timing signal from a press machine. The conventional feed mechanism is fixedly mounted on the frame of the press machine, and the feed amount for each stroke is adjusted by an adjusting screw or the like.

-Problems to be solved by the invention-In the processing of small press parts, in order to improve the processing efficiency, it is desired to mount a plurality of molds on one press machine and simultaneously process a plurality of strip plate materials. Requests may occur. In such a case, if the feeding amounts of the plurality of attached molds are different, there is a problem that the conventional feeding mechanism cannot cope with it. That is, since the conventional feed mechanism has a structure in which a strip plate material attached to a press machine is inserted for each set stroke stroke of the press machine, the strip material is inserted into the press machine. When feeding by this feeding mechanism, all of the plurality of strip plate materials are fed at the same feeding amount.

Further, since the conventional feed mechanism is designed with the idea of being fixed to the frame of the press machine and attached to the press machine, there is a problem that the device becomes large and the price is expensive.

-Means for Solving Problems- Therefore, in the present invention, by providing a material feeding mechanism having a structure which is mounted between a movable die set and a fixed die set of a press machine and is used as a pair with a die, The problem is solved.

The material feeding mechanism of the present invention comprises a cam 18 fixed to the movable die set 9 of the press machine and a main body unit 19 fixed to the fixed die set 1. The cam 18 has a cam surface 32 with an offset amount L corresponding to the feed amount required for the pair of molds 15, and a vertical surface 33 having a sufficient length extending from the upper end of the cam surface. The main body unit 19 has a cam roller 29 facing the cam 18, and the cam roller 29 is axially supported by a slide block 22 which is horizontally reciprocally supported by a base 20 fixed to the fixed die set 1. ing. The slide block 22 is biased in a direction to bring the cam roller 29 into contact with the cam surface 32, and the base 20 is formed with a material passage 6a through which the strip plate material 7 passes. The fixed claw 43 is attached to the base 20, and the feed claw 48 is attached to the slide block 22 so that the tip of the feed claw 48 faces the material passage 6a and is swingable in the feed direction of the strip plate 7 and urged toward the material passage 6a. It is provided.

The material feeding mechanism 17 of the present invention is used as a pair with the mold 15, and when a plurality of molds 15 are mounted on one press machine as shown in FIG. The number of material feeding mechanisms 17 ... 17 corresponding to the number is mounted.

-Operation- When the movable die set 9 descends, the cam roller 29 of the main body unit 19 contacts the cam surface 32 to move the slide block 22, and the movable die set 9 further descends to move the cam roller 29.
The material is molded or assembled by the mold 15 while the 29 is in contact with the vertical surface 33. Next, when the movable die set 9 moves upward, the mold 15 separates from the strip plate 7 while the cam roller 29 is in contact with the vertical surface 33, and then the cam roller 29 moves along the cam surface 32 to slide the slide block.
Move 22 in the opposite direction.

When the slide block 22 moves in the direction opposite to the feed direction during the reciprocating movement of the slide block 22, the strip plate member 7 is caught by the fixed pawl 43 to prevent the retreat and the feed pawl 48 swings in the feed direction. Then, the feed claw 48 slides on the strip plate 7 to move away from the strip 7. Also,
When the slide block 22 moves in the feed direction, the feed claw 48 catches the strip plate material 7 and the fixed claw 43 swings in the feed direction, so that the fixed claw 43 slides on the strip plate material 7 and the strip plate material 7 slides. Only 22 movements will be sent. This feed amount is set by the offset amount L of the cam surface 32.

Since the feeding mechanism 17 having the above structure can be made extremely small, it can be paired with the die 15 to move the movable die set 9 of the press machine.
It can be mounted between the fixed die set 1 and the fixed die set 1. When a plurality of molds 15 ... Type
It is possible to set the feed amount of the strip 7 ...

-Example- The figure shows one example of the present invention.

4 and 5 show the essential parts of a press machine equipped with the material feeding mechanism of the present invention, in which 1 is a fixed die set of the press machine and 2 is a fixed die set. The lower die (die) shown in the figure comprises a backing plate 3, a die plate 4 and a stripper plate 5, and a material passage 6 is formed between the die plate 4 and the stripper plate 5. 7 is a strip material to be processed,
Reference numeral 9 is a movable die set that moves up and down by being guided by the guide rod 8, 11 is an upper die (punch) fixed to the movable die set 9, and the one shown in the drawing comprises a backing plate 12, a punch plate 13 and a punch 14. There is. The movable die set 9 moves up and down at a predetermined timing while being guided by the guide rod 8 to process the strip plate material 7 in the material passage 6.

Reference numeral 17 generally indicates a material feeding mechanism according to the present invention,
One die is provided for each die 15. As shown in FIGS. 1 and 2, the material feeding mechanism 17 includes a cam 18 fixed to the movable die set 9 and a main body unit 19 fixed to the fixed die set 1. 20 is a base of the main body unit 19, 21 is a recess formed in the base 20, 22 is a slide block, 23 is a guide rod installed in the recess 21,
The guide rod is inserted into a guide hole 24 formed in the slide block 22, and supports the slide block 22 so as to be reciprocally movable in the horizontal direction.

Reference numeral 25 shown in FIG. 3 is a through hole formed in both sides of the rear portion of the base 20 in parallel with the material feeding direction, 26 is a spring receiver closing the through hole 25, and 27 is a spring receiver 26 passing through the through hole 25. A compression spring interposed between the slide block 22 and the slide lock 22 biases the slide block 22 in the material feeding direction (rightward in the figure). 29 is a support shaft 30 fixed to the slide block 22.
Is a cam roller rotatably supported at both ends of the. The cam 18 of the movable die set is mounted at a position facing the cam roller 29, and the cam surface 32 that abuts the cam roller 29.
And a vertical surface 33 extending upward from the cam surface 32. When the movable die set 9 moves downward due to the stroke motion of the press machine, the cam roller 29 contacts the cam surface 32, and the cam 18 resists the slide block 22 against the urging force of the compression spring 27 to the left in the figure (anti-material feed). Direction).

36 and 37 are notches in the material feeding direction formed in the base 20 and the slide block 22, and a material passage 6a is formed in the bottom surface of the notch 36. 38 is a pin erected in the notch 36 of the base 20, 39 is a claw holder pivotally mounted by the pin so as to be swingable in the feeding direction of the strip 7, and 41 is a notch
A spring retainer is laid across the base 20 while straddling the 36, and a retainer spring 42 is interposed between the retainer holder 38 and the spring retainer 41, and biases the retainer holder 38 clockwise in the drawing. 43 is a claw holder 39
It is a fixed claw fixed to the tip of by a set screw 44.

Similarly, the pawl holder 45 is pivotally attached to the support shaft 30 penetrating the notch 37 of the slide block 22,
A pawl presser spring 47 is interposed between a spring retainer 46 and a pawl holder 45 that are installed on the slide block 22 across the notch 37, and bias the pawl holder 45 clockwise in the drawing. 45
The feed claw 48 is fixed to the tip of the with a set screw 49.
Both ends of the claws 43 and 48 face the material passage 6a, and are swingable in the feeding direction of the strip plate 7 and urged toward the material passage 6a by the above structure.

The material feeding mechanism 17 having the above structure is used as a pair with the press die 15, and when a plurality of die 15 are mounted on one press machine and a plurality of strips 7 ... Selects and mounts a cam 18 having an offset amount L corresponding to the material feed amount of each die, so that a plurality of strip plate members 7 ... Can be fed at different feed amounts according to the stroke operation of the press machine. You can send it at. In the embodiment shown in the drawings, the cam surface 32 of the cam 18 is mounted in the direction opposite to the feeding direction of the strip 7 to feed the strip 7 when the slide block 22 is moved back by the compression spring 27. Although the structure is such that the cam surface 32 is mounted in the feeding direction of the strip plate material 7 to feed the strip plate material 7 when the movable die set 9 descends, or the cam surface 32 of the cam 18 has a reverse taper. It is also possible to adopt a structure or the like.

-Effects of the Invention-As described above, in the material feeding mechanism of the present invention, the cam is fixed to the movable die set, and the main body unit provided with the slide block that pivotally supports the cam roller is fixed to the fixed die set to move the movable die. The slide block is reciprocated horizontally as the set moves up and down, and the feed claws attached to the slide block are used to intermittently feed the strip material, which simplifies the structure of the feed mechanism and reduces the entire feed mechanism. It can be made very compact, and thus can be mounted between the movable die set and the fixed die set in a pair with the mold, and the stroke motion of the press machine can be used to feed the material. Also, if a plurality of molds are mounted on one press machine, a feeding mechanism is provided for each mold, and if a cam having a cam surface with an offset amount required for each mold is mounted, a plurality of molds can be mounted simultaneously. It is possible to feed individual strip plate materials at different feed amounts, and it is possible to dramatically improve the processing efficiency of small press parts.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a central sectional view of a material feeding mechanism, FIG. 2 is a view taken in the direction of arrow A in FIG.
FIG. 4 is a plan view of the main body unit, FIG. 4 is a side view of a main part of a press machine equipped with the material feeding mechanism of the present invention, and FIG. 5 is a view on arrow B of FIG. In the figure, 1: Fixed die set, 2: Lower die (die) 6: Material passage of die 6a: Material passage of material feeding mechanism 7: Strip plate material, 9: Movable die set 14: Punch, 15: Mold 17 : Material feeding mechanism, 18: Cam 19: Main unit, 20: Base 22: Slide block, 29: Cam roller 30: Support shaft, 32: Cam surface 33: Cam vertical surface, 38: Pin 39, 45: Claw holder, 42, 47: Claw presser spring 43: Fixed claw, 48: Feeding claw L: Cam offset amount

Claims (1)

(57) [Claims] 1. A press unit comprising a cam (18) fixed to a movable die set (9) and a main body unit (19) fixed to the fixed die set (1), wherein the cam (18) is a cam surface (3).
2) and a vertical surface (33) extending from the upper end of the cam surface, the main unit (19) is fixed to the cam roller (29) facing the cam (18) and the fixed die set (1). A base (20) and a slide block (22) which is reciprocally movable in the horizontal direction and supported by being biased in the direction of the cam (18) are supported by the base, and the cam roller (29) is attached to the slide block (22). A material passage (6a) is formed that is axially supported and through which the strip plate (7) passes, is urged with its tip facing the material passage (6a), and swings in the feeding direction of the strip plate (7). A fixed claw (43) and a feed claw (48) are provided so that the fixed claw (43) is mounted on the base (20) and the feed claw (48) is mounted on the slide block (22). Material of the press machine, characterized in that it is mounted in pairs with the mold (15) mounted on the Feeding mechanism.