JP2002143973A - Driving device for movement side member in forming machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust more densely and precisely the operation of a transfer side member in a forming machine. SOLUTION: The device is such that an auxiliary driving system, which relatively transfers a moving side die for a ram 4, is branched off from the main driving system of the ram 4 and that the auxiliary driving system is equipped with a cam mechanism 90 for adjusting the transfer starting timing, transfer completing timing, transfer quantity, etc., of the transfer side die for the ram 4 and also with a lever mechanism 100 for adjusting the transfer starting position, transfer completing position, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming machine for forming a material into a predetermined shape with a forming member such as a die or a punch, and belongs to the technical field of plastic working.

[0002]

2. Description of the Related Art In general, a molding machine for plastically processing a material into various metal parts such as bolts and nuts is provided with a die on a die block (fixing member) of a machine frame, and a ram (moving forward and backward) facing the die block. The moving member) is provided with a punch, and the material is formed into a predetermined shape by contacting the die with the punch. Usually, since the material after molding remains on the die, a knockout pin for extruding the material is provided on the die side. However, in the case of so-called reverse forming in which a forming concave portion is also provided in a punch, a knockout pin may be provided on the ram side since a material after forming may remain in the punch.

[0003] Japanese Utility Model Publication No. 7-53797 discloses a technique for adjusting the pushing operation of a knockout pin provided on the ram side. According to this, a cam mechanism is connected via a link to a crank shaft for moving the ram forward and backward, and the cam mechanism is operated in synchronization with the forward and backward movement of the ram. A bell crank is arranged between the cam mechanism and the knockout pin, the lever on the input side contacts the cam surface of the cam mechanism, and the lever on the output side contacts the knockout pin. The bell crank swings according to the cam mechanism, and the swing causes the knockout pin to move forward and backward in the same direction as the forward and backward movement of the ram. As is evident, the cam surface of the cam mechanism is formed such that the knockout pin projects from the punch in the die direction when the ram is retracted.

The above-mentioned cam mechanism has two cam plates, a main cam plate and an auxiliary cam plate. The auxiliary cam plate is provided inside the main cam plate, and can be advanced from the main cam plate or retracted to the main cam plate. When the auxiliary cam plate is retracted to the main cam plate, the cam surface of the entire cam mechanism is defined only by the cam surface of the main cam plate. However, when the auxiliary cam plate has advanced from the main cam plate, the cam surface of the cam mechanism is defined by the combination of the cam surface of the main cam plate and the cam surface of the auxiliary cam plate that follows the cam surface. Therefore, by adjusting the advance amount of the auxiliary cam plate,
By changing the shape (lift timing and lift amount) of the cam surface of the cam mechanism, it is possible to adjust the push-out operation (movement start timing, movement end timing, movement amount, etc.) of the knockout pin.

[0005]

By the way, as an example of moving the moving side member provided on the ram relative to the ram in this way, for example, a die or a punch on the ram side in closed forging is mentioned. Can be In closed forging,
A die is provided on both the die block and the ram, and the ram advances to bring the two dies into contact with each other to form a closed cavity therein, and the material is accommodated in the cavity. Then, by piercing the punch from at least one of the die block side and the ram side into the cavity, the material flows in the cavity, and the cavity,
It is processed into a shape composed of the piercing punch.

Here, in order for the punch to protrude into the cavity, the die forming the cavity and the punch must be relatively moved. For example, when the die is moved integrally with the ram, the punch is moved relative to the ram. Conversely, when the punch is moved integrally with the ram, the die is moved relative to the ram. As a technique for moving the molding member on the ram side relative to the ram, it is conceivable to employ the conventional technique disclosed in the above-mentioned publication.

However, the adjustment of the operation of the molding member on the ram side in the closed forging is a problem directly related to the quality of the product, and therefore it is necessary to perform the adjustment more precisely and precisely. It is not sufficient to simply adjust the movement start timing, movement end timing, movement amount, and the like by changing the shape of the cam surface of the mechanism.

For example, in closed forging, the punch must enter the cavity after the fixed and moving dies have completely contacted each other. Therefore, the temporal relationship between the contact operation of both dies and the punching operation is strictly managed. Further, when punches are to be inserted from both the fixed side and the movable side, unless both punches are inserted at the same timing, the material flows unevenly and the processing accuracy is reduced. Therefore, not only between the die and the punch but also between the punches, the temporal relationship of the operation is strictly controlled.

Further, the two dies after the contact may be clamped by a clamp member so that the two dies after the contact do not succumb to the increase in the internal pressure due to the penetration of the punch into the cavity and do not open. In some cases, the two dies after contact may be moved to a clamping place. In this case, since both dies are moving after the contact, more and more between the die and the punch,
In addition, the time relationship between the operations of the two punches must be precisely and precisely adjusted.

In addition, it goes without saying that the die and punch operations must be readjusted every time the shape or size of the product to be manufactured changes.

If the operation of the moving member provided on the ram can be adjusted more precisely, by applying it to the knockout pin, the material discharging operation can be adjusted more precisely than before. As a result, it contributes to speeding up of the molding machine.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to adjust the operation of a moving member in a molding machine more precisely and more precisely. Hereinafter, the present invention will be described in detail including other problems.

[0013]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention described in claim 1 of the present application (hereinafter referred to as "first invention") comprises a fixing member provided on a fixing member. A driving device for the moving-side member in a forming machine that forms a material with the forming member of the member and the forming member of the moving-side members provided on the moving member that moves forward and backward with respect to the fixed member, A main drive system that moves forward and backward with respect to the fixed member, and an auxiliary drive system that is branched from the main drive system and moves a predetermined member of the movable members relative to the movable member. A cam mechanism that adjusts at least one of a movement start timing, a movement end timing, and a movement amount of the predetermined member with respect to the moving member; And having a lever mechanism for adjusting at least one of the positions.

According to the present invention, in addition to adjusting at least one of the movement start timing, the movement end timing, and the movement amount of the predetermined member by using the cam mechanism, the movement of the predetermined member is performed by using the lever mechanism. Since the position at the start and the position at the end of the movement are adjusted together, it is synergistic to adjust these different parameters at the same time, and the predetermined member is moved more precisely and precisely. Can be moved relative to.

Next, the invention according to claim 2 (hereinafter referred to as “second
In the first invention, the lever mechanism is provided with an input lever that swings in accordance with the cam mechanism, and is provided coaxially at an angle with the input lever, and swings with the swing of the input lever. An output lever for driving a predetermined member, wherein the position of the predetermined member is adjusted by changing an angle between these levers.

According to the present invention, since the position of the predetermined member can be adjusted only by changing the angle between the input and output levers in the lever mechanism, the configuration of the lever mechanism and, consequently, the overall configuration of the molding machine are simplified.

Next, the invention according to claim 3 (hereinafter referred to as “third
The present invention is characterized in that, in the first invention or the second invention, the predetermined member is a die, a punch, or a knockout pin.

According to the present invention, the die or punch on the ram side in closed forging as described above, or the knockout pin on the ram side in reverse forming can be operated more precisely, and a high-precision product can be manufactured with high performance. Can be manufactured.

Next, the invention according to claim 4 (hereinafter referred to as “fourth
The invention) is the invention according to any one of the first invention to the third invention, wherein the timing adjustment of the cam mechanism, the movement amount adjustment,
And a servo motor for adjusting the position of the lever mechanism.

According to the present invention, since each parameter is adjusted using the servo motor, the adjustment can be performed easily and accurately. Hereinafter, the present invention will be described in further detail through embodiments of the present invention, including other problems, with reference to the drawings.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a multi-stage molding machine 1 according to the present embodiment comprises a die block 3 provided on a machine frame 2 and a ram moving forward and backward with respect to the die block 3. And 4. The fixed-side die units 5a to 5c provided on the die block 3 and the movable-side die units 6a to 6c provided on the ram 4 form first to third stations S1 to S3. The first station S1 receives the wire a cut by the cutter device 7 as a material, corrects the end face of the material, and generates a columnar material A having a predetermined dimension as shown in FIG. The second station S2 is
As shown in FIG. 3, an intermediate product B having a plurality of protrusions b1... B1 (only one is shown) on the peripheral surface and having recesses b2 and b2 on both end surfaces is obtained by closing and forging the cylindrical material A. Generate.
The third station S3 is provided with concave portions b2 and b2 of the intermediate product B.
The gap is punched to produce a final product C having a through hole c1 in the center as shown in FIG. The present invention is applied to the moving die unit 6b of the second station S2.

In the following description, unless stated otherwise,
The term "forward from the fixed side" refers to the direction toward the moving side, and the term "forward from the moving side" refers to the direction toward the fixed side. As shown in FIG. 5, the fixed die unit 5b of the second station S2 has a substantially cylindrical die housing 11 inserted into the die block 3. A die holder 12 is accommodated in the die housing 11 so as to be movable back and forth. The die 1 has a spring 1 interposed between the die holder 12 and the receiving member 13.
4, the forward movement is regulated at a position shown in the figure by a stopper bolt 15 extending rearward.

In the front end face of the die holder 12, a recess 1 is formed.
A fixed die 16 having 6a is mounted. The molding recess 16a has a shape that is one half of the shape of the intermediate product B. An eject sleeve 18 is slidably inserted in a hole 17 passing through the die holder 12 and the fixed die 16. The eject sleeve 18 is pushed forward by the knockout pin 19 after molding, and discharges the intermediate product B. A fixed-side punch 21 is slidably inserted in the eject sleeve 18 back and forth. A retainer 22 is attached to the rear end of the fixed-side punch 21.

A plurality of die clamps 23 are accommodated between the die housing 11 and the die holder 12.
As shown in FIG. 6, each of the clamps 23... 23 has a shape obtained by dividing a cylindrical member into four at every 90 °. Each clamp 23 ...
Reference numerals 23 are connected to each other by springs 24... And are urged in a direction in which the entire diameter is increased. Clamp 23
A plurality of circumferential grooves that can be engaged with each other are formed in the inner peripheral surface 23a of the die holder 12 and the front end 12a of the outer peripheral surface of the die holder 12.

As shown in FIG. 7, the outer peripheral surface of the clamp 23 has a first arcuate surface 23b, a first taper surface 2 from the front end side.
3c, a second arc surface 23d having a smaller diameter than the first arc surface 23b,
And the second tapered surface 23e. Correspondingly, the front end of the inner peripheral surface of the die housing 11 also has a first arc surface 11b, a first taper surface 11c, a second arc surface 11d having a smaller diameter than the first arc surface 11b, and a second arc surface from the front end side. It is composed of a tapered surface 11e and a further smaller third circular arc surface 11f.

As shown in FIG.
Is supported by a ring member 25 slidably fitted to the third arc surface 11f of the die housing 11. The clamps 23 are biased forward by a plurality of pins 26... 26 (only one is shown) and springs 27. The forward movement is restricted at the position shown in the figure by a stopper plate 28 attached to the front end surface of the die housing 11.

As shown in FIG. 5 and FIG.
.., 23 are enlarged in diameter when located in the front within the die housing 11, and the first arcuate surfaces 23 b, 11 b, the first taper surfaces 23 c, 11 c, the second arcuate surfaces 23 d, 11 d, and the second
The tapered surfaces 23e and 11e contact each other. On the other hand, FIG.
As shown in FIG. 10, when the clamps 23... 23 are pushed rearward in the die housing 11, the first and second tapered surfaces 23c, 11c and 23e,
The diameter is reduced along 11e, and the first circular surface 23b is in contact with the second circular surface 11d of the die housing 11, and the second circular surface 23d is in contact with the third circular surface 11f.

As shown in FIG. 8, the second station S2
The movable die unit 6b has an outer holder 41 disposed on the front surface 4a of the ram 4. As shown in FIG.
The outer holder 41 houses a first inner holder 42, a receiving plate 43, a second inner holder 44, and a receiving member 45 from the front end side. First inner holder 42
The slide sleeve 46 is accommodated so as to be movable back and forth. The slide sleeve 46 is urged rearward by springs 47... 47 interposed between the slide sleeve 46 and the first inner holder 44, and the rearward movement thereof is driven by a drive rod 57 via pins 56. Regulated by location.

A stopper pin 48 is provided on the inner surface of the first inner holder 42. The stopper pin 48 defines the range of forward and backward movement of the slide sleeve 46 and prevents the slide sleeve from rotating.

A movable die holder 49 having the same diameter as the fixed die holder 12 is attached to the front end of the slide sleeve 46, and a movable die 50 having a recess 50a for molding is mounted on the front end surface of the movable die holder 49. ing. The molding recess 50a has the other half of the shape of the intermediate product B. Front end 4 of outer peripheral surface of movable die holder 49
9a, the inner peripheral surfaces 23a... 23a of the clamps 23.
And a plurality of circumferential grooves that can be engaged with the groove. The front end surface 46a of the slide sleeve 46 is
Overhangs in the radial direction beyond the outer peripheral surface.

A moving-side punch 52 is slidably inserted into the hole 51 passing through the die holder 49 and the die 50 and the inside of the slide sleeve 46. Behind the moving side punch 52, an auxiliary punch 53 is slidably inserted in the slide sleeve 46 back and forth. The moving-side punch 52 is urged forward by a spring 54 interposed between the moving-side punch 52 and the auxiliary punch 53, and its forward movement is restricted at the position shown in the drawing by contact with the back surface of the die holder 49, and the leading end moves. It protrudes from the side die 50 by a predetermined amount.

A slide block 55 is accommodated in the second inner holder 44 so as to be movable back and forth. A plurality of pins 56... 56 penetrating through the receiving plate 43 are interposed between the slide block 55 and the slide sleeve 46. The front end of the drive rod 57 is in contact with the rear surface of the slide block 55.

As shown in FIG. 8, the drive rod 57 is provided at the front of the ram 4 so as to be movable back and forth. A groove 61 having a tapered rear surface 61a is formed in a front portion of the ram 4, and a block member 62 also having a tapered rear surface is accommodated in the groove 61.
The block member 62 is interposed between the receiving member 45 of the movable die unit 6b and the tapered surface 61a of the ram 4. The block member 62 has a screw shaft 64 stopped by a lock nut 63. The screw shaft 64 is attached to the groove 61.
And is screwed with a nut-like body 66 provided on the bracket 65.

When the nut-like body 66 is rotated by appropriate means, the block member 62 moves up and down and simultaneously moves back and forth along the tapered surface 61a. Thereby, the receiving member 45, the second inner holder 44, the receiving plate 43, the first receiving member 45, which are accommodated in the outer holder 41 of the movable die unit 6b.
The inner holder 42 and the slide sleeve 46 move back and forth, and as a result, the position of the moving die 50 in the front and rear direction can be adjusted.

Next, the ram 4 which constitutes a characteristic part of the present invention will be described.
And the driving system of the moving die 50 will be described. FIG.
As shown in FIG. 1, the multi-stage molding machine 1 is provided with a crankshaft 71 driven by a drive source (not shown), and a connecting rod 73 is connected to a crankpin 72 of the crankshaft 71. The ram 4 is connected to the connecting rod 73 via a connecting pin 74, and the ram 4 moves forward and backward with respect to the die block 3 by the eccentric rotation of the crankshaft 71 (drive system of the ram 4).

On the other hand, a link member 82 is connected via a connecting pin 81 to a position near the upper rear of the connecting rod 73.
Are connected. The link member 82 extends above the ram 4 via the opening 4 b on the upper surface of the ram 4, and its tip is connected to the cam mechanism 90 via the connecting pin 83. The input lever 101 of the lever mechanism 100 comes into contact with the cam surface 90a of the cam mechanism 90 with the cam follower 102, and the output lever 103 is connected to the rear end of the driving rod 57 by the cushioning member 10.
4 is in contact.

The eccentric rotation of the crankshaft 71 for moving the ram 4 forward and backward moves the cam mechanism 90 via the link member 82.
And the lever mechanism 100 operate synchronously, and as a result, the drive rod 57 moves back and forth, and the slide block 55, the pins 56... 56, the slide sleeve 46 and the die holder 4
The movable die 50 relatively moves with respect to the ram 4 via 9 (drive system of the movable die 50). And the die 50
(Movement start timing, movement end timing, movement amount, movement start position, movement end position, etc.) are precisely adjusted by the cam mechanism 90 and the lever mechanism 100.

The cam mechanism 90 has a cam shaft 91 rotatably mounted between a pair of brackets (not shown) provided upright on the upper surface of the ram 4. A main cam plate 92 to which the link member 82 is connected is integrally assembled with the cam shaft 91. The main cam plate 92 has an auxiliary cam plate 93 slidably mounted therein. A servo motor 94 is mounted on the main cam plate 92 and a bevel gear 9 mounted on an output shaft 95 thereof.
6 meshes with a bevel gear 98 attached to a screw shaft 97 screwed with the auxiliary cam plate 93. By driving the servo motor 94, the auxiliary cam plate 93 advances from the main cam plate 92 or retreats to the main cam plate 92, and the cam surface 90a of the entire cam mechanism 90 changes.

When the auxiliary cam plate 93 is retracted to the main cam plate 92, the cam surface 90a of the cam mechanism 90 is defined only by the cam surface 92a of the main cam plate 92. However, when the auxiliary cam plate 93 has advanced from the main cam plate 92, the cam surface 90a of the cam mechanism 90 is
And the cam surface 93a of the auxiliary cam plate 93, which is continuous with this. Therefore, by adjusting the advance amount of the auxiliary cam plate 93, the cam surface 90a of the cam mechanism 90 is adjusted.
(Lift timing and lift amount) change, whereby the relative movement (movement start timing, movement end timing, movement amount) of the moving die 50 with respect to the ram 4 can be adjusted.

The lever mechanism 100 is disposed between the cam mechanism 90 and the driving rod 57. A cavity 4c is formed behind the groove 61 of the ram 4, and above the cavity 4c, a lever shaft 105 spanned between a pair of brackets (not shown) is disposed. An input lever 101 and an output lever 103 are rotatably supported on a lever shaft 105, respectively. The input lever 101 extends rearward substantially below the cam mechanism 90. The output lever 103 extends downward in the cavity 4c substantially toward the rear of the drive rod 57.

The levers 101 and 103 have extensions 106 and 107 extending upward substantially in parallel with each other. Servo motor 1 is attached to extension 107 of output lever 103
08 is assembled, and its output shaft is a screw shaft, which is screwed with the extension 106 of the input lever 101. Therefore, the levers 101 and 103 are integrally connected, and the shaft 1
It swings around 05.

When the servo motor 108 is driven, the extension 106 of the input lever 101 is moved to the extension 1 of the output lever 103.
07. This allows both levers 10
The angle θ between 1 and 103 changes. Therefore, the angle θ
Is adjusted, the buffer member 10 of the output lever 103 is adjusted.
4 is changed in the front-rear direction, and the ram 4 of the moving die 50 is moved.
(Position at the start of movement, position at the end of movement) can be adjusted.

The servo motor 108 is seated on an extension 107 of the output lever 103 with a spherical bearing 109. The output shaft of the servomotor 108 is also engaged with the extension 106 of the input lever 101 by a spherical bearing 110. Output lever 1
03 is provided with an air cylinder 111 in an extension 107,
The rod presses the extension 106 of the input lever 101 so as to be separated from the extension 107 of the output lever 103.

The drive rod 57 is provided with a spring 57a for urging the rod 57 backward. The drive rod 57 is also urged rearward by the above-mentioned springs 47 acting to pull the slide sleeve 46 back. Therefore, the output lever 103 receives the force stably backward from the drive rod 57, and as a result, the input lever 101 is always in contact with the cam surface 90a.

As shown in FIG. 5, the second station S2
Is transferred, the ram 4 starts moving forward (time t1: see FIG. 11). As a result, the moving die 5
0 is in contact with the fixed die 16, a cavity is formed therein, and the material A is accommodated in the cavity. FIG.
The ram 4 moves forward and retreats until the moving-side punch 52 comes into contact with the auxiliary punch 53, and the material A is located at the center of the cavity between the moving-side and fixed-side punches 52 and 21. The state is shown (time t2). FIG. 10 shows that the ram 4 is advanced to the most advanced position, the punches 21 and 52 are maximally inserted into the cavity, and the raw material A flows in the cavity, and the cavity and the punches 21 and 52 which are intruded. This shows a state in which the intermediate product B has been processed into the shape of the intermediate product B composed of the tip portion (time t3).

As shown in FIG. 11, the state shown in FIG.
During the transition to the state of 0, the moving side punch 52 advances integrally with the ram 4 (solid line R). On the other hand, the moving die 50 advances relatively slowly with respect to the moving punch 52 and the ram 4 (broken line S). Thereby, both the moving side and fixed side punches 5
2 and 21 enter the cavity at the same timing, the material A flows evenly, and the processing accuracy is maintained. In this example, the moving die 50 moves relative to the ram 4 in the retreating direction by a distance L1 (an area surrounded by a solid line and hatched) between times t2 and t3.

When the material A becomes longer, the processing amount becomes larger, or the punching amount becomes larger, the material A becomes
At the earlier time t2 ', the punches 5 on the moving side and the fixed side.
2, 21 and from the time t2 ', the two punches 52,
The machining must be started by pushing 51 in. That is, the moving die 50 is advanced relatively slowly from the earlier time t2 '(dashed line T), and the relative movement distance of the ram 4 in the retreating direction is increased by L2 (the area surrounded by the chain line and shaded). become.

In the multi-stage molding machine 1 according to the present embodiment,
In addition to using the cam mechanism 90 to adjust at least one of the movement start timing, the movement end timing, and the movement amount of the moving die 50, the lever mechanism 100 is used to adjust the movement of the moving die 50 at the start of movement. Since at least one of the position and the position at the end of the movement is adjusted together, the simultaneous adjustment of these different parameters allows the moving die 50 to be moved precisely and precisely. 52 can be moved relative to 52. As a result, the adjustment of the times t2 and t2 'or the distances L1 and L2 as described above can be easily and precisely performed using the servomotors 94 and 108.

In the above description, the moving die 50 in the closed forging is moved relative to the ram 4, but the moving die 50 is not limited to this, and the moving punch 52 may be moved relatively. Further, the movable knockout pin in the reverse forming may be relatively moved.

[0050]

According to the present invention, moving-side members such as dies, punches, and knockout pins provided on a ram of a molding machine can be operated more precisely and precisely, and a high-precision product can be manufactured at high speed. Can be. INDUSTRIAL APPLICABILITY The present invention is widely and preferably applicable to plastic working techniques such as closed forging and reverse forming.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a molding machine according to an embodiment of the present invention.

FIG. 2 is a view showing a shape of a material after molding at a first station of the molding machine.

FIG. 3 is a view showing the shape of a material after molding in a second station.

FIG. 4 is a view showing the shape of a material after molding at a third station.

FIG. 5 is an enlarged sectional view of a second station.

FIG. 6 is a front view of a fixed die unit.

FIG. 7 is an enlarged view of a die clamp.

FIG. 8 is an enlarged sectional view showing a drive system of a ram and a drive system of a moving die.

FIG. 9 is an enlarged sectional view showing a state immediately before a punch enters a cavity.

FIG. 10 is an enlarged cross-sectional view showing a state in which the punch has entered the cavity to the maximum.

FIG. 11 is a time chart showing speed changes of a ram and a moving die.

[Explanation of symbols]

 Reference Signs List 1 multi-stage molding machine 3 die block (fixing member) 4 ram (moving member) 6a to 6c moving-side die unit 50 moving-side die (moving-side forming member) 52 moving-side punch (moving-side forming member) 57 drive rod 82 link Member 90 Cam mechanism 94, 108 Servo motor 100 Lever mechanism 101 Input lever 103 Output lever

Claims (4)

[Claims] 1. A molding machine for molding a material by a molding member of a fixed member provided on a fixed member and a molding member of a movable member provided on a moving member which moves forward and backward with respect to the fixed member. A driving device for the moving member,
A main drive system for moving the movable member forward and backward with respect to the fixed member, and an auxiliary drive system branched from the main drive system and relatively moving a predetermined member of the movable members relative to the movable member. An auxiliary drive system that adjusts at least one of the movement start timing or the movement end timing or the movement amount of the predetermined member with respect to the moving member, and the position of the predetermined member with respect to the movement member at the start or end of movement. And a lever mechanism for adjusting at least one of the two. 2. An input lever which swings in accordance with a cam mechanism, and an output lever which is provided coaxially at an angle with the input lever, and which swings with the swing of the input lever to drive a predetermined member. 2. The driving device according to claim 1, wherein the position of the predetermined member is adjusted by changing an angle between the levers. 3. The driving device for a movable member in a molding machine according to claim 1, wherein the predetermined member is a die, a punch, or a knockout pin. 4. The movement of the molding machine according to claim 1, further comprising a servomotor for adjusting the timing of the cam mechanism, adjusting the amount of movement, and adjusting the position of the lever mechanism. Driving device for side member.