JPH0593636U - Homer material extrusion equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To make it easy and easy to change the extrusion stroke of the work material extrusion rod when the punch moves backward. A cam driven lever 9 for pushing and driving a work material extruding rod 8 mounted in the punch 4 is axially supported on a reciprocating table 2 that supports the punch 4, and the reciprocating table 2 is driven. The reciprocating carriage 2 is attached to the crank arm 7
In the work material extruding device provided with a cam for driving the cam driven lever 9 when the cam is moved backward, the rotating body 15 rotatably supported by the crank arm 7 is used as the cam.
Cam 1 with different working heights at multiple locations around the
7A to 17C are provided, and a homer material extruding device is provided which is provided with fixing means 20 for fixing the rotating body 15 in a state in which each of these cams is selectively positioned at an operating position for the cam driven lever 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work material extruding device that pushes a work material out of a reciprocating punch when the punch retracts and moves in a multistage homer that forms a bolt or the like.

[0002]

[Prior art and its problems]

 In this type of work material extruding device, a reciprocating carriage that supports a punch pivotally supports a cam driven lever that pushes and drives a work material extruding rod installed in the punch in the pushing direction. JP-A-52-48133 discloses a work material extruding device in which a crank arm for driving a shaft is provided with a cam for driving the cam driven lever when the reciprocating table is moved backward.

In the conventional work material extruding device described in this publication, one cam is detachably mounted on the crank arm, and therefore, the swing stroke of the cam driven lever driven by the cam. (I.e., the extrusion stroke of the extrusion rod) cannot be changed unless the cam is replaced with one having a different working height. Therefore, when it is necessary to change the extrusion stroke of the extrusion rod due to a change in the work piece, the cam must be replaced with a corresponding working height each time, but the cam has a weight of several 10 kg. 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.

[0004]

[Means for Solving the Problems]

 The present invention has been made in order to solve the above-mentioned conventional problems, and the features thereof are indicated by the reference numerals of the embodiments described later. Is driven by a cam driven lever 9 that presses and drives the work material extruding rod 8 mounted in the punch 4 in the extruding direction on the reciprocating table 2 that supports the punch 4. In the work material extruding device in which the crank arm 7 is provided with a cam for driving the cam driven lever 9 when the reciprocating carriage 2 moves backward, the crank arm 7 is rotatable as the cam. Cams 17A to 17C having different working heights are provided at a plurality of positions around the rotary body 15 pivotally supported by the cams 17A to 17C, and the respective cams 17A to 17C are selectively positioned at the acting positions on the cam driven lever 9. The rotating body 1 in the state Characterized in that provided fixing means 20 for fixing the.

[0005]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the attached exemplary drawings. In FIG. A table 3 is a die mounted on the fixed table 1, and a table 4 is a punch supported by the reciprocating table 2. One end of the reciprocating carriage 2 is loosely fitted to a revolving crankpin 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.

An extrusion rod 8 for extruding the workpiece W is installed in the punch 4. On the reciprocating carriage 2, a cam driven lever 9 for driving the pushing rod 8 and an intermediate transmission lever 11 are pivotally supported by supporting 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 connected to one end of the cam driven lever 9. It is in contact with the tip of the attached pressing bolt 13 with adjustable protrusion amount. 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 in a protruding manner on the upper side of the end of the crank arm 7 on the side of the reciprocating carriage 2, and the rotating body 15 is supported between the bearings 7a. It is rotatably supported by a shaft 16. As shown in FIG. 1B, cams 17A to 17C are provided on the peripheral surface of the rotating body 15 at regular intervals. Each of the cams 17A to 17C has arcuate reference surfaces 18a to 18c which are concentric with the support shaft 6 which supports the crank arm 7 on the reciprocating carriage 2, and the reference surfaces which are continuous with the reference surface on the same side. The cam heights Ha to Hc are different from each other, and the cam crests 19a to 19c are different from each other.

Reference numeral 20 denotes a fixing means for the rotating body 15, which includes positioning holes 21a to 21c, fixing screw holes 22a to 22c, and crank holes formed in the rotating body 15 corresponding to the cams 17A to 17C. A knock pin 23 that selectively penetrates into the positioning holes 21a to 21c through a pin hole provided in one bearing portion 7a of the arm 7 and one bearing portion 7a of the crank arm 7 It is composed of a fixing bolt 24 which penetrates a bolt hole provided in the above and is selectively screwed into the fixing screw holes 22a to 22c.

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. Accordingly, the rotating body 15 is fixed to the crank arm 7. In such a 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 via the crank arm 7 by the revolution of the crankpin 5 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 presses the head Wa of the workpiece W supported by the die 3 between the punch 4 and the die 3. Will be done. At this time, the pushing rod 8 is pushed backward by the head Wa of the workpiece W with respect to the punch 4, 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 is in contact with or close to the reference surface 18a of the cam 17A.

The crank pin 5 revolves clockwise in the drawing, but as described above, when the crank pin 5 revolves from the dead end A on the output side to the dead point B on the input side, 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, in the first half of the backward stroke, the crank arm 7 is supported by the reciprocating carriage 2 side as shown in FIG. While swinging downward about the shaft 6, the reciprocating carriage 2 is pulled backward. When the crank arm 7 swings downward at this time, the cam driven roller 14 that is in contact with or close to the reference surface 18a of the cam 17A rides on the cam mountain surface 19a of the cam 17A. Become. In other words, the end of the cam follower lever 9 on the cam follower 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. Then, the pressing portion 11a presses the rear end of the pushing rod 8 forwards by rotating counterclockwise. That is, as the reciprocating carriage 2 (punch 4) moves rearward, the pushing rod 8 is pushed forward with respect to the punch 4. Therefore, as shown in FIG. 2, the extrusion rod 8 prevents the workpiece W from being pulled out of the die 3 by the punch 4 moving away from the die 3 by pressing the workpiece head Wa toward the die 3 side. Then, 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 back upward 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 forward from the position where it is in contact with 14, and is released, the pressing action against the push 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 spindle. 6 further swings upward and then swings downward to return to the position shown in FIG. 1A. At this time, the cam driven roller 14 moves in the circumferential direction on the reference surface 18a of the cam 17A. Only by moving, no driving action is performed on the cam driven lever 9.

It should be noted that the punch 4 in which the die 3 and the extruding rod 8 are installed can be replaced according to the work piece. As a result, as shown in FIG. 1A, the reciprocating carriage 2 (punch 4) can be moved forward. When the position of the push rod 13 on the cam driven lever 9 side is changed by the cam 17A when the rear end position of the extruding rod 8 whose position is close to the work head Wa is changed. The pushing force of the cam driven roller 14 is adjusted so as to be reliably transmitted to the pushing rod 8.

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

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 on the circumference of 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]

[Operation and effect of the device]

 As described above, according to the work material extruding device of the present invention, when the extruding stroke of the extruding rod is changed, the cam itself on the crank arm is not replaced with a cam having a different working height, but is placed around the extruding rod. It is only necessary to rotate the rotating body equipped with multiple cams with different working heights, move the cam with the desired working height to the position corresponding to the cam driven roller, and fix the rotating body. The work for changing the extrusion stroke is extremely 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 a main part.

FIG. 2 is a partially longitudinal side view showing a state where a reciprocating carriage (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 Axis 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, for driving the reciprocating table. In a work material extruding device provided with a cam that drives the cam driven lever when the reciprocating carriage is moved backward, the cam is provided at a plurality of positions around a rotating body rotatably supported by the crank arm. Workpieces of a homer, each of which is formed with a different working height, and is provided with a fixing means for fixing the rotating body in a state in which each of the cams is selectively located at an acting position with respect to the cam driven lever. Extruder.