JPH09201700A - Press machine - Google Patents

Abstract

(57) [PROBLEMS] To provide a press machine capable of suppressing the inclination of a slider due to sliding resistance and uneven load. SOLUTION: When a driving machine 9 operates and a rotational force is generated on an output shaft 9a, the rotational force is converted from a crank mechanism 11 into a reciprocating motion in a substantially vertical direction via a connecting rod 16 and transmitted to the driving member 60. Is moved downward by being guided by the slider guide 4 via the bush 21, and the upper mold 22 fixed to the lower end of the drive member 60 is moved to the lower mold 2 on the bolster 2.
The object to be processed placed on the upper mold 3 is shaped according to the shape of the lower mold 23. At this time, the rotational force of the output shaft 9a is transmitted to the rotational shaft 30 of the knockout device 85 via the rotational force transmission mechanism 95, the rotational shaft 30 rotates, and when the cam 28 reaches a certain rotational angle, the push-up pin 25 is pushed up. , The knockout pin 36 moves upward, and the molding member moves to the lower mold 23.
It is pushed out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine, for example, a press machine for forming cold extruded parts, punched parts and drawn parts.

[0002]

2. Description of the Related Art As a known technique relating to a conventional press machine of this type, for example, there is one disclosed in Japanese Patent Publication No. 60-26639. That is, in this known technique, a hydraulic cylinder is used as a forming force generator, and a crown on which the forming force generator is placed and a bed on which a workpiece is placed are arranged at four corners in a horizontal section, for a total of four pieces. The workpiece is formed by vertically moving a large rectangular slider to which a die is attached and fixing the rod with the rod.

[0003]

However, the above-mentioned known technology has the following problems. That is, in the large-sized slider type press machine according to this known technique,
The structure is such that the slider moves up and down by using four guide rods as guides. At this time, in order to ensure smooth vertical movement during pressing, it is necessary to provide a gap required for sliding between the slider and the guide rod. Therefore,
These gaps are provided at four corners of the large slider, and as a result of these gaps being added together, a large amount of backlash may occur, which may cause a large inclination of the slider due to imbalance of sliding resistance during vertical movement.

Further, if the molding work is carried out in a state where there is a large inclination due to such a sliding resistance, the slider receives a load in the inclined state (hereinafter, this state will be referred to as an unbalanced state), and a large size The inclination of the slider may be further increased in combination with the bending of the slider itself. further,
In a so-called transfer type press machine in which a plurality of processes are molded at the same time, the inclination of the slider caused by the above two factors may be further increased due to the deviation of the load applied to a plurality of workpieces. The inclination of the slider generated as described above is replaced by the inclination of the die attached to the slider, which may make it difficult to obtain a highly accurate machined part. There is.

A first object of the present invention is to provide a press machine capable of suppressing the inclination of the slider due to sliding resistance and uneven weight.

A second object of the present invention is to provide a press machine capable of suppressing an increase in the inclination of the slider due to the deviation of the load applied to a plurality of workpieces when simultaneously forming a plurality of steps.

[0007]

In order to achieve the above first object, according to the present invention, a forming force generating device having a rotating force generating mechanism having a rotating shaft and a crank mechanism connected to the rotating shaft is formed. Means, an upper frame to which the forming force generating means is fixed, a lower frame on which the workpiece is arranged,
An intermediate connecting means for connecting the upper frame and the lower frame, a drive member which moves up and down by the operation of the forming force generating means, a processing head fixed to the lower end of the drive member, and a vertical movement of the drive member. Guide means to guide,
In a press machine having a forming force transmission unit that is connected to the crank mechanism and that converts the rotational force of the rotating shaft into a reciprocating motion in a substantially vertical direction and transmits the reciprocating motion to the driving member, the guide unit includes the upper frame and An intermediate frame which is provided between the lower frame and fixed to the intermediate connecting means, and the intermediate frame penetrates through the driving member and supports the driving member slidably in the vertical direction. There is provided a press machine comprising: That is, when the rotating force generating mechanism of the forming force generating means operates, the rotating force of the rotating shaft is converted into a reciprocating motion in a substantially vertical direction via the crank mechanism and the forming force transmitting means, and the drive member is guided by the guide means. A processing head that moves up and down and is fixed to the lower end of the driving member processes the workpiece placed on the lower frame. At this time, as the guide means, an intermediate frame fixed to the intermediate connecting means for connecting the upper frame and the lower frame is used, and the drive member is supported by the through hole provided in the intermediate frame so as to be vertically slidable. As a result, a gap for ensuring smooth vertical movement during pressing is provided between the through hole provided in the intermediate frame and the outer periphery of the driving member. Here, conventionally, since the gaps are provided at four corners of the large slider, these gaps are added together to cause a large amount of play, and the large slider slides in the vertical direction under such large amount of play. Due to the structure, the sliding resistance is large, and as a result, the slider may be largely tilted. On the other hand, in the present invention, since one driving member has only a slight gap between the driving member and the through hole, a large amount of rattling does not occur unlike the conventional case. Since the relatively small driving member slides under such small backlash, the sliding resistance becomes smaller than in the conventional case. Therefore, the inclination of the driving member due to the sliding resistance can be reduced, and the load can be received almost vertically. Further, in the past, when a load is applied to the slider while it is tilted during pressing, the vertically moving driving member itself may bend to further increase this tilt. Thus, the load can be received almost vertically, and even if an uneven load occurs, the small drive member that moves up and down is extremely small in deflection, so an increase in the inclination of the drive member when an uneven load occurs is suppressed. be able to.

Preferably, in the press machine, there is provided the press machine, wherein the intermediate frame has a slide assist means provided on an inner circumference of the through hole to reduce friction with the drive member. It As a result, the sliding of the driving member in the vertical direction can be further smoothed, and it is sufficient to replace only the sliding assisting means when it wears, which facilitates maintenance.

Further preferably, in the press machine, the forming force transmitting means is rotatably coupled to a crankshaft of the crank mechanism at an upper end thereof and rotatably pin-coupled to a driving member at a lower end thereof to rotate. A press machine is provided which is a first movable rod that constitutes a link mechanism. As a result, smooth power transmission is possible while preventing the lateral movement of the crankshaft from affecting the drive member, or preventing the lateral behavior of the drive member from affecting the crankshaft.

In order to achieve the above first and second objects, preferably, in the press machine, there are a plurality of driving members and a plurality of processing heads, and correspondingly, the through hole of the intermediate frame is also provided. There are multiple each,
Further, each drive member is provided with a first concave surface portion that is directed substantially upward, and the forming force transmission means has a first spherical head that engages with the first concave surface portion of each drive member at a lower end thereof. A plurality of second movable rods each having a portion formed therein and a second spherical head formed at an upper end thereof; and a third movable rod rotatably coupled to a crank shaft of the crank mechanism in the vicinity of the upper end thereof. A plurality of second concave surface portions that engage with the second ball head are formed in the lower portion, and an upper portion is rotatably pin-coupled to the vicinity of the lower end of the third movable rod, and the intermediate connecting means. And a distribution frame that is slidably guided and held in the vertical direction by means of which a molding force from the third movable rod is distributed to and transmitted to the plurality of second movable rods. A press machine is provided. Accordingly, it is possible to simultaneously drive the plurality of driving members and the processing heads and simultaneously process the plurality of workpieces.

In order to achieve the above first and second objects, preferably, in the press machine, there are a plurality of driving members and a plurality of processing heads, and the crank of the forming force generating means is correspondingly provided. There are also a plurality of mechanisms, the forming force transmitting means, and the through holes of the intermediate frame, and the plurality of crank mechanisms have rotation shafts of the rotation force generating mechanism such that the crank rotation angles are always different from each other. A press machine is provided, which is characterized in that it is connected to. Thereby, it is possible to avoid the simultaneous positioning of a plurality of crank mechanisms in the vicinity of the bottom dead center where the maximum forming force is generated, and perform the time difference forming process. Therefore, although a plurality of processing heads are formed by the power of one rotational force generating mechanism, a large amount of power is not required even when forming one processing head. That is, energy saving at the time of molding can be achieved, and for example, the rotational force generating mechanism can be downsized and the cost can be reduced.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG. FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. The present embodiment is the simplest embodiment in which molding is performed with one die. The overall structure of the press machine according to this embodiment is shown in FIGS. 1 and 2. 1 is a vertical cross-sectional view of the press machine as seen from the front direction, and FIG. 2 is a vertical cross-sectional view taken along line C-C in FIG. 1 and 2, the press machine 100 roughly includes a forming force generation device 90 that generates a forming force for performing processing, and a forming force generation device 90 on the upper side via a fixing means (not shown). A fixed crown 6, a bolster 2 fixedly connected to the pedestal 1, and vertically planted at four corners of the bolster 2.
A tie rod 3 of a book, a slider guide 4 provided between the crown 6 and the bolster 2 in parallel with them, and fixed to the tie rod 3, a crown 6 and a slider guide 4
And an upright 5 provided between and.

The tie rod 3 has a substantially circular cross-sectional shape, and has a threaded portion 3a provided at the upper end, a small diameter portion 3b continuing below the threaded portion 3a, and this small diameter portion 3b.
And a large-diameter portion 3c continuing below. Here, as shown in FIG. 3 which is a cross section taken along the line AA in FIG. 1, the upright 5 has a substantially circular tube shape in which the inner circumference is fitted to the outer circumference of the small diameter portion 3b. 1 and 2, the crown 6 has a through hole 6a penetrating the small diameter portion 3b, and the slider guide 4 has a through hole 4a penetrating the small diameter portion 3b.
It has. That is, the small diameter portion 3b is penetrated through the slider guide 4, the upright 5, and the crown 6 in this order, and the bolster 2, which is screwed into the screw portion 3a of the tie rod 3, is tightened.
Tie rod 3, slider guide 4, upright 5,
The crown 6 is firmly and accurately and stably fixed. At this time, as for the slider guide 4, when the nut 7 is tightened with the crown 6 and the upright 5 interposed therebetween, the slider guide 4 is pressed and fixed toward the upper end surface of the large diameter portion 3c of the tie rod 3 via the spacer 8. .

The forming force generator 90 is a driving machine 9 as a mechanism for generating a rotational force necessary for generating the forming force, and a coupling 10 attached to an output shaft 9a of the driving machine 9.
A crank mechanism 11 that is connected to the coupling 10 and rotates by the power transmitted by the coupling 10; and a bearing 13 that is firmly fixed to the crown 6 and rotatably supports the crank mechanism 11. A cover 17 integrally formed with the upper end of the connecting rod 16 is rotatably attached to the crankshaft 11a of the crank mechanism 11 via a plain bearing 12. The connecting rod 16 serves as a forming force transmission unit that converts the rotational force of the output shaft 9a of the driving machine 9 into a reciprocating motion in a substantially vertical direction and transmits the reciprocating motion.

Below the connecting rod 16, a driving member (slider) 60 that moves up and down by the forming force generated by the operation of the forming force generator 90 being transmitted by the connecting rod 16.
The upper die 22 fixed to the lower end of the drive member 60 is installed. The drive member 60 includes a fork end portion 60a that engages with the plain bearing 18 fitted to the lower end eye end portion 16a of the connecting rod 16,
It is fastened by a pin 19 in a freely rotatable state. Further, the slider guide 4 has a substantially circular through hole 4b penetrating the driving member 60 to support the driving member 60 slidably in the vertical direction, and the driving member 6 provided on the inner surface of the through hole 4b.
And a bush 21 that alleviates sliding friction with zero. Here, as the bush 21, for example, a slide bearing, a plain bearing, a plain bush, or the like can be used. FIG. 4 shows a cross-sectional view taken along the line BB in FIG. 1 showing the arrangement state of the bush 21. The bush 21 can further smooth the sliding of the driving member 60 in the vertical direction, and since it is sufficient to replace only the bush 21 at the time of wear, maintenance can be facilitated.

Referring back to FIGS. 1 and 2, a lower mold 23 is attached to the upper surface of the bolster 2 with an insert plate 24 (described later) as a guide, and a knockout device 80 is attached to the lower side of the bolster 2. Knockout device 8
0 is a rotary shaft 3 having a push-up pin 25 that engages the roller 26 with the fork end portion 25a, a pin guide 27 that serves as a guide for the push-up pin 25, and a cam 28 that can push up the push-up pin 25 by rotation.
0, and a support base 29 that rotatably supports the rotating shaft 30,
The lower part is inserted into the through hole 2a of the bolster 2 and is pushed by the push-up pin 25 to move upward in the through hole 23a of the lower mold 23, and the insert plate 24 that serves as a guide for the knockout pin 36 and the like. It consists of

The knockout device 80 operates by mechanically transmitting the rotational force from the forming force generator 90 via the rotational force transmission mechanism 95. That is,
The rotational force transmission mechanism 95 includes a coupling 14, a transmission shaft 15, and a coupling 4 which are sequentially connected to the crank mechanism 11.
9, the transmission shaft 45, and the transmission shaft 45 with a bevel gear built-in.
Power transmission 35 that converts rotation about a substantially horizontal axis into rotation about a vertical axis, a transmission shaft 34 that is rotated via the power transmission 35, and a cup that connects the transmission shaft 34 and the transmission shaft 46. Ring 33 and transmission shaft 46
Power transmission 32 for converting rotation around a substantially vertical axis into rotation around a horizontal axis, a transmission shaft 47 rotated through the power transmission 32, a transmission shaft 47, and a knockout device 80.
It is composed of a coupling 31 and the like for connecting to the rotating shaft 30 of.

In the above description, the tie rod 3, the upright 5, and the nut 7 constitute the intermediate connecting means 70 for connecting the crown 6 and the bolster 2.

The operation and action of the above configuration will be described below. In the press machine 100 having the above-described configuration, when the driving machine 9 of the forming force generator 90 operates and a rotational force is generated on the output shaft 9a, this rotational force is substantially vertically moved from the crank mechanism 11 via the connecting rod 16. Is converted into reciprocating motion and transmitted, and the driving member 60 is guided by the slider guide 4 via the bush 21 to move downward, and the upper mold 22 fixed to the lower end of the driving member 60 is moved on the bolster 2. Workpiece placed on the lower die 23 (not shown)
Is shaped according to the shape of the lower mold 23. At this time, the rotational force of the output shaft 9a is transmitted to the rotational shaft 30 of the knockout device 85 via the rotational force transmission mechanism 95, and the rotational shaft 3 is rotated.
0 rotates, and when the cam 28 of the knockout device 80 reaches a certain rotation angle, the push-up pin 25 is pushed up. The upward movement of the push-up pin 25 causes the knockout pin 36 to move upward, and the molding member is pushed out of the lower die 23.

In the above operation, in the press machine 100 of this embodiment, the slider guide 4 fixed to the tie rod 3 is used as the guide means for guiding the vertical movement of the driving member 60, and the slider guide 4 is provided. Since the driving member 60 is slidably supported in the vertical direction in the through hole 4b, the clearance for ensuring smooth vertical movement at the time of pressing has an outer circumference between the bush 21 provided in the through hole 4b and the driving member 60. Will be provided between and (see FIG. 4). Here, in the past, since gaps for ensuring smooth vertical movement were provided at the four corners of the large slider, they were added together to cause a large amount of backlash, and under such a large amount of backlash Since the slider, which is a structure, is configured to slide in the vertical direction, the sliding resistance increases, and as a result, the slider may have a large inclination. In contrast to this, the press machine 10 of the present embodiment
At 0, such a gap is provided only slightly between the drive member 60 and the bush 21, so that a large amount of rattling does not occur unlike the conventional case. Since the relatively small driving member 60 slides under such small play, the sliding resistance becomes smaller than that of the conventional one.
Therefore, the inclination of the drive member 60 due to the sliding resistance is reduced,
Alternatively, the load can be set to zero and the load can be received almost vertically.

Further, conventionally, when the driving member 60 receives a load while being tilted at the time of pressing and an unbalance is generated, the slider itself which moves up and down may bend to further increase the tilt. In the press machine 100 of the present embodiment, the load can be almost vertically received as described above, and even if the load is biased, it is the small driving member 60 that moves up and down, and the bending is extremely small.
It is possible to suppress an increase in the inclination of the drive member 60 when uneven weight is generated. Therefore, the upper mold 2 fixed to the driving member 60
It is possible to improve the processing accuracy according to 2. Further, since the driving member 60 receives the applied load almost vertically without waste, it is possible to obtain a press machine having high rigidity, small size, and high mechanical efficiency. Further, since the driving member 60 that constantly slides in the vertical direction can be downsized, the maintainability can be improved.

Further, the connecting rod 16 which is rotatably connected to the crankshaft 11a of the crank mechanism 11 near the upper end and is rotatably pin-connected to the drive member 60 near the lower end constitutes the rotary link mechanism. By converting the rotational force of the shaft 9a into a reciprocating motion in a substantially vertical direction and transmitting the reciprocating motion, the behavior of the crankshaft 11a in the lateral direction can be changed.
Does not affect or the lateral behavior of the drive member 60 does not affect the crankshaft 11a, and enables smooth power transmission.

A second embodiment of the present invention will be described with reference to FIG. The present embodiment is an embodiment of a press machine that simultaneously performs two processes with one forming force generator 90 and one crank mechanism 11. FIG. 5 is a vertical sectional view showing the entire structure of the press machine 200 according to this embodiment. The same members as those in the first embodiment are designated by the same reference numerals, and those provided two by two are denoted by suffixes L or R, respectively, and shown separately.

In FIG. 5, the press machine 2 of this embodiment is shown.
00 is different from the press machine 100 of the first embodiment in that the driving members 60L and R, the upper molds 22L and R, the through holes 4Lb and Rb of the slider guide 4, and the bush 21.
L, R, lower mold 23L, R, knockout device 80L,
Two Rs and the like are provided as indicated by subscripts, and the driving members 60L and 60R have a concave surface portion 39 facing substantially upward.
It is composed of upper mold bases 39L, R having La, Ra and sliders 41L, R, and as a molding force transmission means for transmitting the molding force generated by the molding force generator 90 to the sliders 60L, R. In addition to the connecting rod 16, the concave surface portions 39 of the upper mold bases 39L and 39R are provided at the lower ends, respectively.
Connecting rods 38L, R having ball heads 38La, 38Ra engaged with La, Ra and ball heads 38Lb, Rb formed at the upper end, and a concave portion engaging with ball heads 38Lb, Rb at the lower part. 37Lb, Rb and fixed plate 42L,
R is formed, and the fork portion 37a provided on the upper portion is the pin 1
9 and plain bearing 43 through connecting rod 16
And a movable frame 37 rotatably pin-connected to the lower end of the.

At this time, the movable frame 37 is vertically slidably guided and held by the upright 5 which is provided between the slider guide 4 and the crown 6 and which is firmly fitted to the tie rod 3, and the forming force is generated. The forming force transmitted from the device 90 via the connecting rod 16 is applied to the connecting rod 3
It plays a role of distributing and transmitting to 8L and R. Further, bushes 44L and R are attached to the sliding portion between the movable frame 37 and the upright 5 for smooth sliding. In addition, the rotary shaft 30 of the knockout device 80L, R
The L and R are connected by a coupling 48, and the rotational force from the molding force generator 90 is mechanically transmitted via the rotational force transmission mechanism 95 to rotate in synchronization. .

The other structure is almost the same as that of the press machine 100 of the first embodiment.

According to this embodiment, in addition to the same effect as the first embodiment, one driving force generator 90 drives two driving members 60L, R and upper molds 22L, R,
Two workpieces can be processed simultaneously.

In the above embodiment, the drive member 6
0L, R, upper molds 22L, R, through holes 4Lb, Rb of the slider guide 4, bushes 21L, R, lower mold 23
Two L, R, knockout devices 80L, R, etc. are provided, but the present invention is not limited to this, and three or more can be provided, and in this case, the same effect is obtained.

A third embodiment of the present invention will be described with reference to FIGS. In this embodiment, one forming force generator 9 is used.
This is an embodiment of a press machine in which two machining processes are performed with a time difference between 0 and two crank mechanisms 11L and 11R.

FIG. 6 is a vertical sectional view showing the entire structure of the press machine 300 according to this embodiment. The same members as those in the first and second embodiments are denoted by the same reference numerals, and those provided two by two are denoted by suffixes L or R, respectively, and shown separately.

In FIG. 6, the press machine 3 of this embodiment is used.
00 is different from the press machine 100 of the first embodiment in that the crank mechanism 11L of the forming force generator 90,
R, bearings 13L, R, couplings 14L, R of the rotational force transmission mechanism 95, transmission shafts 15L, R, connecting rods 16L, R as forming force transmission means and covers 17L, R, plain bearings 12L, R, plain bearings 18L. ，
R, pins 19L, R, drive members 60L, R, upper mold 22
L, R, through holes 4Lb, Rb of the slider guide 4, bushes 21L, R, lower molds 23L, R, knockout devices 80L, R, etc. are provided two by two as indicated by the subscripts.

At this time, the crank shafts 11La and Ra of the crank mechanisms 11L and R are connected to the output shaft 9a of the driving machine 9 so that the crank rotation angles are always different from each other. This relationship is conceptually shown in FIG. That is, in FIG. 7, assuming that the crank angle of the left crank mechanism 11L is θ _L and the crank angle of the right crank mechanism 11R is θ _R , a constant angular difference Δθ = θ _L −θ _R (for example, 60 °) is obtained. And as a result, the drive member 60
The positions of L and R and the upper molds 22L and R are almost always different, and a stroke difference ΔS _t (however, it changes moment by moment) occurs. Correspondingly, the cams 28L and R fixed to the rotary shafts 30L and R of the knockout devices 80L and R are also configured to always have a constant angular difference (for example, 60 °). The drive member 60 with respect to the rotation angle of the crank mechanisms 11L and 11R as described above.
FIG. 8 shows the strokes of the L and R strokes and the stroke loci of the knockout pins 36L and R by the cam 28. As shown in the drawing, the operation of the drive member 60R and the knockout pin 36R is always delayed by the crank angle of 60 ° from the operation of the drive member 60L and the knockout pin 36L. Press molding → Upper die 22R is press molded → Knockout with knockout pin 36L → Knockout with knockout pin 36R.

The other structure is almost the same as that of the press machine 100 of the first embodiment.

According to the present embodiment, in addition to the same effect as the first embodiment, the crank mechanisms 11a and 11b are prevented from being simultaneously positioned near the bottom dead center where the maximum forming force is generated, and the time difference forming is performed. Processing can be performed. Therefore, although two moldings are simultaneously performed by the two machining heads 22L and 22R by the power of one driving machine 9, when one molding is performed by one machining head 22 as in the first embodiment. It doesn't require much power compared to it. That is, it is possible to save energy at the time of molding, and it is possible to reduce the size and cost of the driving machine 9, for example.

In the above embodiment, the crank mechanisms 11L and R of the forming force generator 90, the bearings 13L and
R, the couplings 14L and R of the rotational force transmission mechanism 95, the transmission shafts 15L and R, and the connecting rod 16 that is a forming force transmission means.
L, R and covers 17L, R, plain bearing 12
L, R, plain bearings 18L, R, pins 19L,
R, drive members 60L, R, upper molds 22L, R, through holes 4Lb, Rb of the slider guide 4, bushes 21L,
Two Rs, lower molds 23L and R, and two knockout devices 80L and R were provided, but three or more can be provided, and even in this case, the crank angles of the crank mechanisms are always different from each other. The same effect can be obtained by configuring.

[0036]

According to the present invention, one driving member is the first
Since there is only a slight gap between the through hole and the through hole, there is no large backlash as in the conventional case. Since the relatively small driving member slides under such small backlash, the sliding resistance becomes smaller than in the conventional case. Therefore, the inclination of the driving member due to the sliding resistance can be reduced, and the load can be received almost vertically. In addition, the load can be received almost vertically in this way, and even if uneven load occurs, it is a small drive member that moves up and down, and the deflection is extremely small. Can be suppressed. Therefore, the processing accuracy of the processing head fixed to the driving member can be improved. Further, since the driving member receives the load substantially vertically without waste, it is possible to obtain a press machine having high rigidity, small size, and high mechanical efficiency. Further, since the driving member that constantly slides in the vertical direction can be downsized, the maintainability can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the overall structure of a press machine according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view taken along the line CC in FIG.

3 is a cross-sectional view taken along the line AA in FIG.

4 is a cross-sectional view taken along the line BB in FIG.

FIG. 5 is a vertical sectional view showing the overall structure of a press machine according to a second embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing the overall structure of a press machine according to a third embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a relationship between crank angles in the press machine shown in FIG.

8 is a diagram showing a stroke locus of a drive member and a stroke locus of a knockout pin in the press machine shown in FIG.

[Explanation of symbols]

1 frame 2 bolster 2a through hole 3 tie rod 3a screw part 3b small diameter part 3c large diameter part 4 slider guide 4a through hole 4b through hole 5 upright 6 crown 6a through hole 7 nut 8 spacer 9 driver 9a output shaft 10 coupling 11 Crank mechanism 11a Crankshaft 12 Plain bearing 13 Bearing 14 Coupling 15 Transmission shaft 16 Connecting rod 16a Eye end part 17 Cover 18 Plain bearing 19 Pin 21 Bush 22 Upper mold 23 Lower mold 23a Through hole 24 Insert plate 25 Push-up pin 25a Fork End part 26 Roller 27 Pin guide 28 Cam 29 Support base 30 Rotating shaft 31 Coupling 32 Power transmission device 33 Coupling 34 Transmission shaft 35 Power transmission device 36 Knocker Topin 37 Movable frame 37a Fork portion 37Lb, Rb concave surface portion 38L, R connecting rod 38La, Ra ball head 38Lb, Rb ball head 39L, R upper die base 39La, Ra concave surface 41L, R slider 42L, R fixed plate 43 plain bearing 44 Bushing 45 Transmission shaft 46 Transmission shaft 47 Transmission shaft 48 Coupling 49 Coupling 60 Driving member 60a Fork end portion 60L, R Driving member 70 Intermediate connecting member 80 Knockout device 80L, R Knockout device 90 Forming force generating device 95 Rotational force transmission Mechanism 100 Press machine 200 Press machine 300 Press machine θ _L Crank angle θ _R Crank angle Δθ Angle difference

Claims (5)

[Claims] 1. A forming force generating means having a rotating force generating mechanism having a rotating shaft and a crank mechanism connected to the rotating shaft, an upper frame to which the forming force generating means is fixed, and a workpiece are arranged. A lower frame, an intermediate connecting means for connecting the upper frame and the lower frame, a driving member that moves up and down by the operation of the forming force generating means, a machining head fixed to a lower end of the driving member, A press having guide means for guiding the vertical movement of the driving member and molding force transmitting means connected to the crank mechanism for converting the rotational force of the rotary shaft into a reciprocating motion in a substantially vertical direction and transmitting the reciprocating motion to the driving member. In the machine, the guide means is an intermediate frame provided between the upper frame and the lower frame and fixed to the intermediate connecting means, and the intermediate frame is Arm is press machine, characterized in that it comprises a through hole for slidably supporting the drive member is penetrated into the drive member in the vertical direction. 2. The press machine according to claim 1, wherein the intermediate frame has a slide assisting device that is provided on an inner circumference of the through hole and reduces friction with the driving member. . 3. The press machine according to claim 1, wherein the forming force transmitting means is rotatably connected to a crank shaft of the crank mechanism near an upper end thereof and rotatably pin-connected to the driving member near a lower end thereof. The press machine is a first movable rod that constitutes a rotary link mechanism. 4. The press machine according to claim 1, wherein there are a plurality of drive members and a plurality of processing heads, respectively, there are a plurality of through holes of the intermediate frame, and each drive member is substantially the same. A first concave surface portion facing upward is provided, and the forming force transmitting means has a first spherical head portion that engages with the first concave surface portion of each drive member at the lower end, and the upper end at the upper end. A plurality of second movable rods having second ball heads, and a third movable rod whose upper end and its vicinity are rotatably coupled to the crankshaft of the crank mechanism.
A plurality of second concave surface portions that engage with the second ball head are formed in the lower portion, and an upper portion is rotatably pin-coupled to the vicinity of the lower end of the third movable rod, and the intermediate connecting means. And a distribution frame that is slidably guided and held in the vertical direction by means of which a molding force from the third movable rod is distributed to and transmitted to the plurality of second movable rods. Press machine. 5. The press machine according to claim 1, wherein each of the driving member and the processing head is plural, and correspondingly, a crank mechanism of the forming force generating means, the forming force transmitting means, and the intermediate frame. A plurality of through-holes, and the plurality of crank mechanisms are connected to the rotary shaft of the rotational force generating mechanism so that the crank rotation angles are always different from each other. .