JPH0719645Y2 - Homer material extrusion equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work material extruding device for pushing a work material out of a reciprocating punch when the punch is retracted in a multistage homer for forming bolts and the like.

[0002]

2. Description of the Related Art As a work material extruding device of this type, a reciprocating carriage for supporting a punch is provided with a cam driven lever for driving a work material extruding rod mounted in the punch in the extruding direction. A work material extruding device in which a crank arm that pivotally drives and drives the reciprocating carriage is provided with a cam that drives the cam driven lever when the reciprocating carriage moves backward is disclosed in Japanese Utility Model Publication No. 52-48133. Kaisho 54
It is known from Japanese Patent No. 133452 .

In the conventional work material extruding device described in Japanese Utility Model Publication No. 52-48133 , one cam is detachably mounted on the crank arm, and therefore the cam driven by the cam is used. The swinging stroke of the driven lever (that is, the pushing stroke of the pushing rod) cannot be changed unless the cam is replaced with a different working height. Therefore, when the work piece is changed and it is necessary to change the pushing stroke of the pushing rod, the cam must be replaced with the one having a corresponding working height each time, but the cam has a weight of several tens of kilograms. However, the work of hoisting and replacing such a cam is very difficult in terms of location and requires a lot of labor and time. Well
The latter, which is disclosed in JP-A-54-133452, is processed.
In the material extrusion device, the cam is formed by two cam members.
Then remove one of the cam members and
It is designed to be replaced with a cam member having a working height.
However, even with this conventional technique, a heavy cam member is used.
It takes a lot of time to replace the required cam members with one by one.
There was a difficulty that it took time and effort.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features will be shown with reference numerals of the embodiments described later. In the work material extruding device of the present invention, a cam follower lever 9 for pushing and driving a work material extruding rod 8 installed in the punch 4 in the extruding direction is pivotally supported on a reciprocating table 2 which supports the punch 4. On the crank arm 7 that drives the reciprocating carriage 2,
When the reciprocating carriage 2 moves backward, the cam driven lever 9
In the workpiece extrusion device provided with a cam for driving the front
The rotating body 15 is rotatably supported by the crank arm 7.
At the same time, cams 17A to 17C having different working heights are formed at a plurality of positions around the rotary body 15 , and the respective cams 17A to 17C are selectively positioned at working positions with respect to the cam driven lever 9. It is characterized in that the fixing means 20 for fixing the rotating body 15 in the above state is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1A, 1 is a fixed base, and 2 is a movable base supported on the fixed base 1. Further, the reciprocating table 3 is a die mounted on the fixed table 1, and 4 is a punch supported by the reciprocating table 2. One end of the reciprocating carriage 2 is loosely fitted to a revolving crank pin 5 and the other end is moved forward and backward with a constant stroke by a crank arm 7 pivotally connected to a rear end of the reciprocating carriage 2 by a spindle 6. It is driven to reciprocate horizontally.

The punch 4 is internally provided with an extruding rod 8 for extruding the workpiece W. The reciprocating carriage 2
Above, a cam driven lever 9 for driving the push rod 8 is provided.
And the intermediate transmission lever 11 are rotatably supported by the support shafts 10 and 12, respectively. One end pressing portion 11a of the intermediate transmission lever 11 contacts the rear end of the pushing rod 8 protruding rearward from the punch 4 and the other end pressed portion 11b.
Is in contact with the tip of a pressing bolt 13 that is attached to one end of the cam driven lever 9 and that can adjust the protrusion amount. or,
A cam driven roller 14 is pivotally supported on the other end of the cam driven lever 9.

As shown in FIG. 3, a pair of left and right bearings 7a are provided on the upper side in the vicinity of the end of the crank arm 7 on the side of the reciprocating carriage 2, and the rotor 15 is supported between the bearings 7a. It is rotatably supported by a shaft 16. The rotating body 1
As shown in FIG. 1B, cams 17 </ b> A to 17 </ b> C are provided on the peripheral surface of No. 5 at equal intervals. Each cam 17A
-17C are arcuate reference surfaces 18a-18c concentric with the support shaft 6 that supports the crank arm 7 on the reciprocating carriage 2.
And the cam crests 19a to 19c which are continuous from the reference surface on the same side and have different operating heights Ha to Hc with respect to the reference surface.
19c and.

Reference numeral 20 denotes a fixing means for the rotating body 15, which has positioning holes 21a to 21c and fixing screw holes 22a formed in the rotating body 15 so as to correspond to the cams 17A to 17C.
22c, one bearing portion 7a of the crank arm 7
The positioning hole 21a through the pin hole provided in the
21c to 21c, and a bolt hole provided in one bearing portion 7a of the crank arm 7 and a screw pin 22a to 22c. The fixing bolt 24 is fastened.

In the state shown in FIG. 1B, the knock pin 23 is inserted into the positioning hole 21a corresponding to the cam 17A having the lowest working height Ha, and the fixing bolt 24 is screwed into the fixing screw hole 22a to rotate. The body 15 is fixed to the crank arm 7. In this state, the cam 17A
Corresponds to the cam driven roller 14 of the cam driven lever 9 on the reciprocating carriage 2 side. However, when the reciprocating carriage 2 is reciprocally driven in the front-rear horizontal direction by the revolution of the crankpin 5 through the crank arm 7 and the reciprocating carriage 2 moves forward to the forward limit position, that is, as shown in FIG. 1A. When the crank pin 5 reaches the dead end A, the punch 4 moves to the work W supported by the die 3 as shown in the drawing.
The head Wa of the die is pressed with the die 3. At this time, the pushing rod 8 is pushed rearward with respect to the punch 4 by the head Wa of the workpiece W, and the cam driven lever 9 that receives the movement of the pushing rod 8 via the intermediate transmission lever 11. The cam driven roller 14
The cam 17A is in contact with or close to the reference surface 18a of the cam 17A.

The crank pin 5 revolves clockwise in the figure, but as described above, when the crank pin 5 revolves from the dead end side dead point A to the entrance limit dead point B, that is, When the reciprocating carriage 2 is moved backward from the forward limit position after the press work on the workpiece W is completed, the crank arm 7 is supported on the reciprocating carriage 2 side in the first half of the backward stroke as shown in FIG. The reciprocating carriage 2 is pulled rearward while swinging downward around the shaft 6. By swinging the crank arm 7 downwards at this time, the cam 17A
The cam driven roller 14, which is in contact with or close to the reference surface 18a, rides on the cam crest surface 19a of the cam 17A. In other words, the cam driven lever 9
The end portion of the cam driven roller 14 side is pushed up by the cam crest surface 19a of the cam 17A.

As a result, the cam driven lever 9 rotates clockwise in the figure, and the pressing bolt 13 pushes down the pressed portion 11b of the intermediate transmission lever 11, so that the intermediate transmission lever 11 in the figure. It rotates counterclockwise, and the pressing portion 11a presses the rear end of the pushing rod 8 forward. That is, as the reciprocating table 2 (punch 4) moves rearward, the push rod 8 is pushed forward with respect to the punch 4. Therefore, as shown in FIG. 2, the work piece W is pulled out from the die 3 by the punch 4 which moves away from the die 3 so that the extrusion rod 8
Presses the work head Wa to the die 3 side to prevent it, and the formed work head Wa is reliably pushed out of the punch 4.

In the latter half of the backward stroke of the reciprocating carriage 2, the crank arm 7 swings up and returns about the support shaft 6 on the reciprocating carriage 2 side, so that the cam crest surface 19a of the cam 17A is driven by the cam follower roller. Since it escapes to the front from the position facing 14 and comes off, the pressing action on the pushing rod 8 is released. Further, when the crank pin 5 is rotated from the entry-side dead center B toward the exit-side dead center A and the reciprocating carriage 2 is moved forward, the crank arm 7 is supported by the reciprocating carriage 2 side supporting shaft. 6 further swings upward, and then swings downward to return to the position shown in FIG. 1A.
The cam driven roller 14 only moves in the circumferential direction on the reference surface 18a of 7A, and the cam driven lever 9 is not driven.

The punch 4 in which the die 3 and the extruding rod 8 are mounted is replaced according to the work piece. As a result, as shown in FIG. 1A, the reciprocating carriage 2 (punch 4) is at the forward limit position. At some point, when a change occurs in the rear end position of the extruding rod 8 whose tip is close to the workpiece head Wa,
The tip position of the pressing bolt 13 on the cam driven lever 9 side is adjusted so that the pushing force of the cam driven roller 14 by the cam 17A is reliably transmitted to the pushing rod 8.

Further, when the cam 17A is used, the pushing rod 8 is moved forward by a small stroke corresponding to the working height Ha. The pushing stroke of the pushing rod 8 is changed by the cam 17B. Working height Hb
Medium stroke corresponding to, or the working height H of the cam 17C
When it becomes necessary to change the stroke to a large stroke corresponding to c, the knock pin 23 and the fixing bolt 24 are removed, the rotating body 15 is rotated around the support shaft 16, and the selected cam 17
After moving B or the cam 17C to a position corresponding to the cam driven roller 14, the knock pin 23 is moved to the positioning hole 21b.
Or 21c to position the rotating body 15 and fix the fixing bolt 24 with the fixing screw hole 22b or 22c.
The rotating body 15 may be fixed to the crank arm 7 by screwing.

It should be noted that the rotating body 15 itself can be configured to be replaceable with another rotating body having a plurality of cams having different working heights around it. Alternatively, the cams 17A to 17C can be replaced with respect to the rotating body 15. Of course, the number of cams provided around the rotating body 15 is not limited to the three in the above embodiment. Further, the fixing means of the rotating body 15 is not limited to the one using the knock pin 23 and the fixing bolt 24 shown in the above embodiment.

[0016]

As described above, according to the work material extruding apparatus of the present invention, when the extruding stroke of the extruding rod is changed, the cam itself on the crank arm is replaced with a cam having a different working height. Instead, simply rotate the rotating body that has multiple cams with different working heights around it, move the cam with the desired working height to the position corresponding to the cam driven roller, and fix the rotating body. Since it is good, the work for changing the extrusion stroke of the extrusion rod is greatly simplified, and the work can be performed easily, easily and efficiently.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of a state where a reciprocating carriage (punch) is at a forward limit position, and FIG. 1B is an enlarged longitudinal side view of essential parts.

FIG. 2 is a partially longitudinal side view showing a state where a reciprocating movable table (punch) starts to move backward.

FIG. 3 is an enlarged front view of a main part.

[Explanation of symbols]

 1 Fixed Table 2 Reciprocating Table 3 Die 4 Punch 5 Crank Pin 6 Crank Pin Shaft Support Spindle 7 Crank Arm 8 Workpiece Extruding Rod 9 Cam Drive Lever 12 Intermediate Transmission Lever 14 Cam Driven Roller 15 Rotating Body 16 Rotating Body Shaft Support shaft 17A Cam 17B Cam 17C Cam 18a Arc reference surface 18b Arc reference surface 18c Arc reference surface 19a Cam crest surface 19b Cam crest surface 19c Cam crest surface 20 Rotating body fixing means 21a Positioning hole 21b Positioning hole 21c Positioning hole 22a Fixing screw hole 22b Fixing screw hole 22c Fixing screw hole 23 Knock pin 24 Fixing bolt

Claims (1)

[Scope of utility model registration request] 1. A crank arm for driving the reciprocating table, wherein a reciprocating table for supporting the punch has a cam follower lever for pushing and driving a work material extruding rod mounted in the punch in the extruding direction. In a work material extruding device provided with a cam that drives the cam driven lever when the reciprocating table is moved backward , a rotating body can be rotated on the crank arm.
In the state in which cams having different working heights are formed at a plurality of positions around the rotating body while supporting the bearings, the respective cams are selectively positioned at the working position with respect to the cam driven lever. A material extruding device for a homer, which is provided with fixing means for fixing the rotating body.