JP2000237897A - Press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press machine capable of improving a working precision better than a conventional way further having a compact constitution in the press machine in which a slide is supported by plungers of two points or more. SOLUTION: Link bodies consisting of a first link 12, a second link 14, and a pivot shaft pivotaly supporting the first link 12/second link 14 are plurally arranged in the same direction, the first links 12 of four pieces is turnably supported to a machine frame 1 by two fixing support shafts 11 on the same axial line, the second links 14 of three pieces are pivotaly supported with moving support shafts 13 arranged to plungers 3 of three pieces connected to a slide 5 on the same axial line, further, the first link and the second link 14 are connected by one pivot shaft 15. Drive links 18 of two pieces supported to a crank shaft are pivotaly supported to the pivot shaft 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press in which a slide is supported by a plurality of plungers in order to accurately drive the slide.

[0002]

2. Description of the Related Art A press machine converts a rotary motion into a reciprocating linear motion to perform a press working. Generally, a press machine is provided between a rotating crankshaft and a reciprocating linear slide via a drive transmission mechanism. It is configured. As this drive transmission mechanism, a slide drive mechanism mainly based on crank drive, knuckle drive, link drive and the like is well known. Crank drive is advantageous when a large stroke is required, and a knuckle mechanism is adopted when the slide speed near bottom dead center is to be slower than crank drive,
Further, a link drive is advantageous as a quick return press.

In recent years, there has been a demand for a press machine that operates at high speed and that reduces the bias of a slide during processing in order to improve processing accuracy. For this purpose, when connecting the drive transmission mechanism to the slide, a plunger that absorbs the eccentric load due to the oscillation transmitted from the drive transmission mechanism and gives linear motion to the slide is provided, or the eccentric load generated during machining is provided. In order to reduce the problem, the connection between the slide and the drive transmission mechanism is configured at two or more points.

The conventional press P3 shown in FIG. 6 is connected at two points using a knuckle mechanism, and is supported by a machine frame 41 and has a crankshaft 42 arranged horizontally in the front-rear direction.
Are mounted with drive links 43 extending substantially horizontally in opposing directions, and fixed shafts 44 are attached to the other ends of the drive links 43.
, A pair of link bodies 45 supported by the pair are formed. Each link body 45 includes a first link 4 supported by the machine frame upward.
6 and a second link 47 pivotally supported by a plunger 50 that supports the slide 51 downward. Each link body 45 is operated so as to bend and extend at a pivot 48 by rotation of the crankshaft 42, and is bent and extended. By doing slide 51
Reciprocating linear motion.

Further, in the press P3, the slide 5
In order to maintain the dynamic balance of the one reciprocating movement, a pair of left and right balancing weights 52 connected from the second link 47 via the balancer link 49 are attached in a direction opposite to the moving direction with the slide 51. ing.

[0006]

However, the above-mentioned press machine P3 is configured such that the link bodies 45 are symmetrically arranged with respect to the crankshaft 42. This is the first
A pair of pivots 48 and other axes for pivotally connecting the link 46 and the second link 47 are required, and the number of parts is increased, and the accuracy of the pivots 48 and other axes or the machine frame 41 for supporting the pivots 48 and other axes is required. Machining accuracy must be extremely high. There is a variation in the pivot 48 and other axes to be machined, and a dimensional difference caused by the variation may cause a decrease in accuracy of the accuracy of the lower surface of the slide. Further, when connecting the plunger 50 connected to the slide 51 to three or more points, it is not possible to arrange the plunger 50 symmetrically with respect to the crankshaft, and the press machine must be complicated.

Another object of the present invention is to provide a compact press machine in addition to the above. In particular, the clutch mechanism conventionally mounted when rotating the crankshaft 42 not only complicates the press but also increases the cost.

The present invention has been made to solve the above-mentioned problems, and in particular, in a press machine in which a slide is supported by two or more plungers, a crank shaft and a plunger are connected by a knuckle mechanism and further processed as compared with the prior art. An object of the present invention is to provide a press machine that can improve the accuracy and can be configured compact.

[0009]

Means for Solving the Problems A press according to the present invention is configured as follows to solve the above-mentioned problems. That is, a press machine that transmits, via a knuckle device, a rotational movement of a crankshaft supported by a machine frame connected to a driving means to a slide supported by a plunger guided to reciprocate linearly, A first link having one end pivotally supported by the machine frame;
A second link having one end pivotally supported by the plunger; and a drive link having one end pivotally supported by the crankshaft. The other end of the first link and the second link is pivotally connected. And the drive link is pivotally attached to the pivot so that the pivot pivots around the support shaft of the first link to reciprocate the plunger, At least two or more plungers are provided, and the first plunger corresponding to each plunger is provided.
A plurality of links and the second links are provided, a plurality of first links and a plurality of second links are provided in the same direction, and a pivot connecting the first link and the second link is provided. , Or one or more on the same axis.

The press according to the present invention is characterized in that a knuckle device is provided on a slide supported by a plunger which is guided to reciprocate linearly by rotating a crankshaft supported by a machine frame and connected to a driving means. And a dynamic equilibrium device connected to the knuckle device above the knuckle device, wherein the knuckle device has a central portion pivotally supported by a machine frame, and an upper and lower , A second link having one end pivotally supported by the plunger, a drive link having one end pivotally supported by the crankshaft, and a second link having one end pivotally supported by the dynamic balancing device. And the first link and the second link, and the first link and the third link are respectively connected by a pivot to form a link body. The drive link is pivotally connected to a pivot connecting the link and the second link, whereby the pivot pivots about a support shaft of the first link to connect the plunger and the dynamic balancing device. The plungers are reciprocated in opposite directions, and at least two or more plungers are provided, and a plurality of the first link, the second link, and the third link corresponding to each plunger are provided,
A plurality of first links, a plurality of second links, and a plurality of third links are arranged in the same direction, and
A pivot connecting the link and the second link;
One or a plurality of pivots connecting the link and the third link are arranged on the same axis.

Preferably, the driving means has a servomotor.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a press machine P of a first embodiment has a crankshaft 2 rotatably supported on a machine frame 1.
A plunger 3 guided by the machine frame 1 and reciprocating linearly in the vertical direction; a slide 5 supported below the plunger 3; a crankshaft 2 supported by the machine frame 1;
And a knuckle device 10 connected to the knuckle device. A bolster 6 placed on the bed 1a is mounted below the slide 5, and a work (not shown) is mounted between the slide 5 and the bolster 6 to convey the work between the dies.

The knuckle device 10 has a first link 12 pivotally connected at one end to a fixed support shaft 11 attached so as to be fixed to an upper portion of the machine frame 1, and has one end connected to the plunger 3 via a movable support shaft 13. Having a second link 14 pivotally mounted and a drive link 18 rotatably supported on the crankshaft 2;
First link 12, second link 14, and first link 12
And a pivot 15 connecting the other end of the second link 14 to form a link body 16 that can be bent and extended by the pivot 15.
Further, by pivotally connecting the drive link 18 to the pivot 15, the link body 16 is bent and stretched, and the slide 5 is reciprocated via the plunger 3.

In this embodiment, the plunger 3 is shown in FIG.
The three plungers 3 are guided and supported by bearings 7, and one end of a second link 14 is engaged with the upper part of each plunger 3, as shown in FIG. The movable support shafts 13, 13, 13 are mounted on the same axis in the longitudinal direction of the slide 5 so as to have the engaging surfaces 3a to be engaged with each other and to be orthogonal to the respective engaging surfaces 3a, 3a, 3a. .

Movable support shaft 13 mounted on each plunger 3
The second link 14 pivotally connected to the arm has three arm portions 14a that bifurcate so as to sandwich the upper part of the plunger 3, and three of them are arranged, and the movable support shafts of the three second links 14, 14, 14 are arranged. Each end on the side opposite to the side 13, 13, 13 is rotatably supported by one pivot 15. The pivot 15 has four first links 12, 1 pivotally attached to the fixed support 11 at the top.
The other ends of 2, 12, 12 are rotatably supported. 4
Two first links 1 at the center of the first links 12
The first and second links 12 and 12 are disposed so as to sandwich the second link 14 at the center, and the first links 12 and 12 on both sides are disposed so as to be in contact with the second links 14 and 14 on both sides. Further, the fixed support shaft 11 supporting the first link 12 at the upper portion is provided with a machine frame for supporting the two first links 12 and 12 on the left side and the two first links 12 and 12 on the right side in FIG. 1
Are arranged on the same axis.

Accordingly, in the present embodiment, the two axes on the same axis are
Four first links 12, 12, 12, 12 supported by the fixed support shafts 11, 11, and three first links 12, 13, 12, 13 supported on the same axis. A link body 16 is formed by one pivot 15 connecting the second links 14, 14, 14 and the four first links 12 and the three second links 14.
Is composed. However, the first link 1 is not limited to the above.
2 may have two branch arms for holding the respective second links 14 and may be arranged in three parts, or may be formed in a plate shape and arranged in two or four or more parts. Further, the fixed support shafts 11 supporting three or four first links 12 may be connected by one and fixed to the machine frame 1, and the movable support shaft 13 supported by the plunger 3 may be one. The book may support three second links 14. Preferably,
The configuration shown in the figure, which is advantageous in assembling the press P, is appropriate.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1 and shows the crankshaft 2 and the drive link 18 pivotally connected to the crankshaft 2. The crankshaft 2 is supported by the machine frame 1 behind the knuckle device 10, and one end of the crankshaft 2 is
9 is connected. The crankshaft 2 has a crank portion 2a
Are formed in two places, and the drive link 18
One end of the drive link 18 is pivotally supported, each drive link 18 is disposed so as to be movable substantially horizontally, and the other end of the drive link 18 is rotatably supported by the pivot 15 described above. The pivot 15 side of the drive link 18 of the present embodiment is formed to have a bifurcated arm portion 18a, and is formed so that the lateral contact with the pivot 15 is reduced. The drive means of the crankshaft 2 is not limited to a servo motor as long as it is a motor whose position can be controlled, and may be, for example, a stepping motor or a linear motor.

In the press machine P constructed as described above, when the crankshaft 2 is rotated by the driving of the servomotor 19, the two drive links 18 pivotally attached to the crank portion 2a.
Is reciprocated in the front-back direction (left-right direction in FIG. 1),
The pivot 15 is swung in the front-rear direction (the left-right direction in FIG. 1) about the fixed support shaft 11 that supports the first link 12. The swing movement of the pivot 15 causes the plunger 3 supported by the bearing 7 to move up and down, and the slide 5 to reciprocate up and down. This makes it possible to press the work conveyed in the mold.

On the other hand, since the servomotor 19 for driving the crankshaft 2 can freely control the rotation speed, rotation direction, rotation timing, and the like of the crankshaft 2 according to the control command, the clutch mechanism can be omitted as in the conventional case. Can,
The press machine P can be made compact and a processing method suitable for a work can be provided at any time.

The press P2 of the second embodiment, as shown in FIGS. 4 and 5, supports the slide 5 with two plungers 3 (referred to as two-point support of the slide), and has a dynamic balancing device above. It shows what is being done. In the following description, the same parts as those described above are denoted by the same reference numerals.

The crankshaft 2 is connected to the servomotor 19 and is rotatably supported by the machine frame 31 as in the above-described embodiment. The crank portion 2a formed on the crankshaft 2 is 2
The drive link 18 is formed so as to reciprocate in a substantially horizontal direction so as to pivotally attach to the crank portion 2a.

On the other hand, the knuckle device 20 includes the drive link 1
8 is connected with a pivot 15 and has a plunger 3 supported on the slide 5 on one side and a link body 26 connected to a counterweight 32 disposed above on the other side. Link body 2
Reference numeral 6 denotes a first link 22 pivotally connected to a fixed support shaft 21 mounted on the machine casing 31, a second link 14 pivotally connected to the movable support shaft 13 of the plunger 3, and a first support 22 fixed to the first link 22. Axis 2
And a third link 24 extending above the first link and connected at its end by a pivot 23. The other end of the third link 24 is connected to the counterweight 32 via a movable support shaft 25. Balance weight 32
Are vertically guided by a guide member 33 mounted on the machine frame 31 to form a dynamic balance device.

Therefore, the first link 22 is connected to the drive link 18.
Is pivotally attached to the fixed support shaft 21 at the central portion by the reciprocating motion, and the pivot shafts 15 and 23 are pivotally mounted at both ends to perform a swinging motion about the fixed support shaft 21. The plunger 3 (and slide 5) connected to the second link 14 performs reciprocating linear motion in the vertical direction, and the counterweight 32 performs reciprocating linear motion in the vertical direction in a direction opposite to the movement of the slide 5. become.

The plunger 3 in the second embodiment is shown in FIG.
Is connected to the slide 5 so as to be arranged side by side,
Each plunger 3 is guided and supported by the bearing 7 in the same manner as described above, and has an engaging surface 3a at the upper portion with which one end of the second link 14 is engaged.
The movable support shafts 13 and 13 are mounted on the same axis in the longitudinal direction of the slide 5 so as to be orthogonal to.

Movable support shaft 13 mounted on each plunger 3
The second link 14 pivotally connected to the second link 14 has two arm portions 14a that bifurcate so as to sandwich the upper part of the plunger 3 and is disposed two each. , 13 are connected to one pivot 15
And is rotatably supported. The other end of each of the two first links 22 pivotally attached to the fixed support shaft 21 at the center of the pivot 15 is rotatably supported. Two first links 22, 2
2 is arranged so as to contact the inside of the second links 14 on both sides. Further, the fixed support shaft 21 supporting the first link 22 at the upper part is the first link 22 on the left side in FIG.
In order to support the first link 22 on the right side,
Book is arranged.

Further, at the other end of the first link 22, the two first links 22, 22 are pivotally connected by one pivot 23, and the distal end is bifurcated at both ends of the pivot 23. One end of each of the two third links 24, 24 is pivotally connected, and each of the third links 24, 24 is rotatably supported by one movable support shaft 25 supported by the balance weight 32. Have been.

Therefore, in this embodiment, one fixed support shaft 21
The two first links 22 and 22 supported by the above, two second links 14 and 14 supported by two movable support shafts 13 on the same axis, and one movable support shaft 25 Supported 2
Third links 24, 24 and two first links 22,
One pivot 15 connecting the second link 22 and the two second links 14, and one pivot 23 connecting the two first links 22 and 22 and the two third links 24 and 24. And constitute the link body 26.

However, the present invention is not limited to the above, and the first link 22 may be arranged to have a bifurcated arm portion for sandwiching the second link 14, and the third link 24 may be formed as a single flat plate. It may be formed. The number is not limited. Further, the plungers 3 may be arranged in three rows. In this case, the first link 22, the second link 14, and the drive link 18 may be arranged as in the above-described embodiment. Fixed support shaft 21 and second link 14 to be supported
May be provided as a single movable support shaft 13, or a plurality of shafts may be arranged so that the shafts are arranged on the same axis.

The above-mentioned press machine P2 has a servo motor 19
The drive link 18 and the link body 26 are operated by rotating the crankshaft 2 by driving (see FIG. 3). When the drive link 18 reciprocates in a substantially horizontal direction, the pivot 15 swings about the fixed support shaft 21 and the first
In the same manner as in the embodiment, the slide 5 is linearly moved in the vertical direction,
At the same time, the pivot 23 at the upper end of the first link 22 is swung. The balance weight 32 performs a reciprocating linear motion in the vertical direction along the guide member 33 via the third link 24 and the movable support shaft 25 by the swinging motion of the pivot shaft 23. At this time, the vertical movement of the balance weight 32 moves to the side opposite to the vertical movement of the slide 5, so that the respective inertial forces cancel each other. Therefore, the continuous reciprocating movement of the slide 5 can be dynamically balanced by the balance weight 32, and reduces the vibration generated in the press P2.

In the press of the present invention, if a plurality of link bodies are arranged side by side in the same direction and each axis is arranged in the same straight line, the slide can be supported at two points or at three or more points. The shape, arrangement, or number of each link or each axis in the configured link body is not limited to the above-described embodiments.

[0032]

According to the present invention, the press according to the first aspect of the present invention is supported by a plunger which is guided by a reciprocating linear motion to rotate the crankshaft connected to the driving means and supported by the machine frame. A knuckle device, wherein the knuckle device has a first link whose one end is pivotally supported by the machine frame, a second link whose one end is pivotally supported by the plunger, A drive link having one end pivotally supported by the crankshaft; the other ends of the first link and the second link are connected by a pivot to form a link body; When the drive link is pivotally connected, the pivot pivots around the support shaft of the first link to reciprocate the plungers, and at least two or more plungers are provided, and Corresponding A plurality of first links and a plurality of second links are provided, a plurality of first links and a plurality of second links are provided in the same direction, and the first link and the second link are connected. One or more pivots are arranged on the same axis.

Therefore, in a press machine that supports at least a slide by two or more plungers, one or a plurality of pivots for connecting the first link and the second link and each other axis on the same axis. It is possible to improve the processing accuracy by disposing, and to improve the parallelism of the slide lower surface by reducing the number of pivots and other axes. Moreover, when the slide is supported by three or more plungers, it is possible to provide a press machine having an extremely simple configuration.

According to a second aspect of the present invention, there is provided a press machine wherein the rotational movement of a crankshaft connected to a driving means and supported by a machine frame is performed by a slide supported by a plunger guided to reciprocate linearly. A knuckle device is provided with a dynamic balance device that transmits through the knuckle device and is connected to the knuckle device above the knuckle device. A first link extending downward, a second link having one end pivotally supported by the plunger, a drive link having one end pivotally supported by the crankshaft, and one end pivotally supported by the dynamic balancing device. A third link, and the first link and the second link, and the first link and the third link are respectively connected by a pivot to form a link body. The drive link is pivotally connected to a pivot connecting the link and the second link, whereby the pivot pivots about a support shaft of the first link to connect the plunger and the dynamic balancing device. The plungers are reciprocated in opposite directions, and at least two or more plungers are provided, and a plurality of the first link, the second link, and the third link corresponding to each plunger are provided,
A plurality of first links, a plurality of second links, and a plurality of third links are arranged in the same direction, and
A pivot connecting the link and the second link;
One or a plurality of pivots connecting the link and the third link are arranged on the same axis.

Therefore, in a press machine configured to achieve dynamic balance, a pivot connecting the first link and the second link, a pivot connecting the first link and the third link, and It is possible to improve the processing accuracy by arranging one or more other axes on the same axis, and to improve the parallelism of the slide lower surface by reducing the number of pivots or each axis. Moreover, when the slide is supported by three or more plungers, it is possible to provide a press machine having an extremely simple configuration.

Further, in the pressing machine according to the first or second aspect, if the driving means is configured to include a servomotor, a compact pressing machine can be provided without a clutch mechanism, and a slide press can be provided. The motion curve can be changed arbitrarily, and it is possible to cope with various types of press working.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a slide drive mechanism of a press according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a side sectional view showing a slide drive mechanism of a press according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line V-V in FIG.

FIG. 6 is a front view showing a conventional press machine.

[Explanation of symbols]

 P, P2 ... Press machine 1, 31 ... Machine frame 2 ... Crank shaft 2a ... Crank part 3 ... Plunger 5 ... Slide 10, 20 ... Knuckle device 11, 21 ... Fixed support shaft 12, 22 ... First link 13, 25 ... Movable support shaft 14 ... Second link 15, 23 ... Pivot shaft 16, 26 ... Link body 18 ... Drive link 19 ... Servo motor (drive means) 24 ... Third link 32 ... Balanced weight

Claims (3)

[Claims] 1. A press machine for transmitting, via a knuckle device, a rotary motion of a crankshaft connected to a driving means and supported by a machine frame to a slide supported by a plunger guided to reciprocate linearly. A knuckle device, a first link having one end pivotally supported by a machine frame, a second link having one end pivotally supported by the plunger, and a drive link having one end pivotally supported by the crankshaft;
The other end of the first link and the second link is connected by a pivot to form a link body, and the drive link is pivotally attached to the pivot, whereby the pivot is The plunger is reciprocated by swinging about a support shaft of the first link, and at least two or more plungers are provided, and the first link and the second
A plurality of links are provided, a plurality of first links and a plurality of second links are provided in the same direction, and one or more pivots connecting the first link and the second link are provided. A press machine comprising a plurality of presses arranged on an axis. 2. A rotary motion of a crankshaft connected to a driving means and supported by a machine frame is transmitted to a slide supported by a plunger guided to reciprocate linearly via a knuckle device. A press having a dynamic balancing device connected to the knuckle device above the knuckle device, wherein the knuckle device has a first link whose center is pivotally supported by a machine frame and extends upward and downward. A second link having one end pivotally supported by the plunger, a drive link having one end pivotally supported by the crankshaft, and a third link having one end pivotally supported by the dynamic balancing device. The first link and the second link, and the first link and the third link are respectively connected by a pivot to form a link body, and the first link and the second link are connected. Do When the drive link is pivotally attached to a shaft, the pivot pivots about the support shaft of the first link to reciprocate the plunger and the dynamic balancing device in opposite directions, respectively, At least two plungers are provided, and the first link and the second
A plurality of links and a plurality of third links; a plurality of first links, a plurality of second links, and a plurality of third links arranged in the same direction;
A pivot connecting the link and the second link;
A press machine, wherein one or a plurality of pivots connecting the link and the third link are arranged on the same axis. 3. The press according to claim 1, wherein said driving means has a servomotor.