JP3826994B2 - Press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press machine having a die height adjusting mechanism and a simplified slide drive mechanism capable of high-precision machining and high-speed drive.
[0002]
[Prior art]
For example, Japanese Patent Laid-Open No. 8-118082 discloses a press machine having a relatively small number of links and a small variation in the bottom dead center position due to the inertial force of the slide. In this conventional example, a mechanism for adjusting the die height is disclosed. Not shown.
[0003]
[Problems to be solved by the invention]
As shown in the conventional example, when a knuckle link mechanism is applied to a two-point press machine, two sets of knuckle link mechanisms are usually arranged to face each other in order to balance left and right. For this reason, in order to drive the slide, it is necessary to connect connecting rods to the eccentric portions of the crankshaft whose phase is shifted by 180 °, which increases the number of links and makes it difficult to reduce the lateral width of the press machine. Further, since the dynamic balancer is also driven by the left and right links, it is necessary to achieve left and right synchronization.
[0004]
An object of the present invention is to provide a press machine capable of high-precision machining and high-speed driving, which includes a die height adjusting mechanism and has a simplified slide driving mechanism, which solves the above-described problems. More specifically, converts the rotation of the crank shaft into a reciprocating motion in the vertical direction in a pair of knuckle link mechanism, the horizontally disposed end in motion to swing the horizontal links of the left and right that are connected to the die height adjustment device, It is a press machine which drives a slide with the lower link connected to the central part of the horizontal link.
[0005]
[Means for Solving the Problems]
[0006]
[0007]
According to the first aspect of the present invention, in a press machine that drives a slide using a link, a crankshaft supported by a frame in the front-rear direction of the press machine, a large end portion is connected to an eccentric portion of the crankshaft, and a slider pin It is attached to a slider that is slidably fitted in a horizontal direction on one connecting rod with a small end connected to it and a horizontal guide fixed to the frame in the horizontal direction of the axis of the crankshaft . 1 and pieces of knuckle link having one end to the slider pin is connected, is provided below the crankshaft, the other end of the fitting to the knuckle linked to attached to the slider pin in the slider has consists concatenated with vertical guides one a set of knuckle link mechanism, one end together and linked pair of connecting links to the slider pin, each provided with vertically adjustable position on the left and right of the frame Die height adjustment pin, one pair of left and right horizontal links, one end connected to the die height adjustment pin, the other end connected to the other end of the connection link, one end connected to the center of the horizontal link, the other end to the slide A pair of connected left and right lower links, a dynamic balancer that is movable at the top and bottom of the press machine frame , one end is connected to the slider pin of the horizontal guide, and a balance weight is attached to the other end And a balancer link whose midpoint is connected to the balancer pin of the dynamic balancer .
[0008]
In this invention, since the slide is moved up and down by one set of knuckle link mechanisms, the slide drive mechanism is simplified. Further, by providing the die height adjusting mechanism on the frame side of the press machine, the slide can be reduced in weight and the slide can be driven at a high speed .
[0009]
Also, the slider pin where the upper end of the knuckle link and the lower end of the balancer link are connected and the lower end of the knuckle link is connected, and the balancer pin where the midpoint of the balancer link is connected, move up and down in opposite directions, driving the slide, the other from driving a dynamic balancer, unbalanced inertial force caused by the reciprocating motion of the slide is canceled, due to the reduced deflection and vibration of the press machine, it is possible to press working precision .
[0010]
Further, since a balance weight for the knuckle link is attached to the extension end of the balancer link, in addition to the function and effect of claim 1, a press machine is generated when the slide is moved up and down by a set of knuckle link mechanisms. It is possible to eliminate the left-right imbalance.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a front view of an essential part of a press machine 1 showing a first reference example. The figure shows the state where the slide is at the bottom dead center, and the state of the link when the slide is at the top dead center is indicated by a two-dot chain skeleton.
[0013]
A crankshaft 2 is rotatably supported by a frame 3 in the front-rear direction of the press machine 1. The crankshaft 2 includes a pair of first eccentric portion 4 and second eccentric portion 5 having the same amount of eccentricity and a phase difference of 180 °. The first eccentric portion 4 of the crankshaft 2 is connected to the large end portion of the first connecting rod 6, and the second eccentric portion 5 is connected to the large end portion of the second connecting rod 7.
[0014]
A vertical guide 8 is fixed to the frame 3 directly below the crankshaft 2, and a slider 9 is fitted into the vertical guide 8 so as to be slidable in the vertical direction. A small end portion of the first connecting rod 6 is connected to the slider pin 10 attached to the slider 9.
[0015]
Two balancer guide pins 11 are suspended above the frame 3, and a dynamic balancer 12 is mounted on the balancer guide pins 11 so as to be movable up and down. A small end portion of the second connecting rod 7 having the same length and the same weight as the first connecting rod 6 is connected to the balancer pin 13 of the dynamic balancer 12 provided immediately above the crankshaft 2.
[0016]
Therefore, when the crankshaft 2 rotates, the slider pin 10 and the balancer pin 13 move up and down by the same distance in the opposite directions to each other in the vertical direction of the axis of the crankshaft 2.
[0017]
Die height adjusting mechanisms 15 are fixed to the left and right frames 3 of the press machine 1. In the die height adjusting mechanism 15, when the worm 16 is rotated by a drive mechanism (not shown), the worm wheel 17 that meshes with the worm 16 rotates, and the screw 18 that engages with the worm wheel 17 moves up and down to finally adjust the die height. The pin 19 moves up and down.
[0018]
The other ends of the pair of left and right connecting links 21 and 21 whose both ends are connected to the slider pin 10 of the vertical guide 8 and the horizontal links 22 and 22 whose one ends are connected to the left and right die height adjusting pins 19 and 19 respectively. The connecting pins 23 and 23 are connected to each other. And the pin 24.24 provided in the center part of those horizontal links 22 and 22 and the pin 26 and 26 of the front-end | tip of the plunger 29 standingly arranged by the slide 30 are connected by the lower links 25 and 25. Yes.
[0019]
Accordingly, when the slider pin 10 moves up and down due to the rotation of the crankshaft 2, the horizontal links 22 and 22 connected to the connection pins 23 and 23 of the left and right connection links 21 and 21 connected to the slider pin 10 become die height adjustment pins. The lower links 25 and 25 connected to the horizontal links 22 and 22 are also moved up and down to move the slide 30 up and down. Note that the die height can be adjusted by changing the vertical position of the die height adjusting pins 19 and 19.
[0020]
In the press machine 1 of this reference example, since the members are arranged symmetrically with respect to the vertical line of the axis of the crankshaft 2, the left and right balance is maintained even during driving. Further, the weight balance in the front-rear direction is achieved by arranging the link symmetrically in the front-rear direction of the press machine by means such as vertically dividing the link into two as required.
[0021]
Furthermore, the weight of the dynamic balancer 12 is balanced with the combined weight of each link, plunger 29 and slide 30. Accordingly, the unbalanced inertial force due to the reciprocating motion of the slide is canceled, and the vibration and deflection of the press machine are reduced.
[0022]
FIG. 2 is a front view of an essential part of a press machine 31 showing a second reference example of the present invention. In the figure, the right half is the top dead center, and the left half is the skeleton showing the link status at the bottom dead center.
[0023]
A crankshaft 32 is rotatably supported by a frame 33 in the longitudinal direction of the press machine 31, and a horizontal guide 34 as a horizontal guide mechanism is fixed to the frame in the horizontal direction of the axis of the crankshaft 32. . A slider 35 is fitted in the horizontal guide 34 so as to be slidable in the horizontal direction. A small end portion of a connecting rod 37 is connected to the slider pin 36 attached to the slider 35. The large end portion of the connecting rod 37 is connected to the eccentric portion 38 of the crankshaft 32.
[0024]
A vertical guide 40 is fixed to the frame 33 at the center of the press machine 31, and a slider 41 is fitted into the vertical guide 40 so as to be slidable in the vertical direction. The slider pin 42 attached to the slider 41 is connected to the other end of the knuckle link 43 whose one end is connected to the slider pin 36 of the horizontal guide 34.
[0025]
Therefore, when the crankshaft 32 rotates, the slider 35 moves horizontally and the slider pin 42 of the vertical guide 40 reciprocates up and down. Since the mechanism for raising and lowering the slide 30 and the die height adjusting mechanism in accordance with the movement of the slider pin 42 are the same as those in the first reference example, the same reference numerals are given to the respective members and the description thereof is omitted.
[0026]
Normally, in a two-point press machine, the slide is driven by two sets of knuckle link mechanisms on the left and right sides. In this reference example, the slide can be moved up and down by one set of knuckle link mechanisms, thus simplifying the drive mechanism. In addition, the lateral width of the press machine can be reduced.
[0027]
A balancer guide (not shown) is suspended above the frame 33, and a dynamic balancer 44 is mounted on the balancer guide pin so as to be movable up and down. The balancer pin 45 of the dynamic balancer 44 provided just above the slider pin 42 of the vertical guide 40 is connected to the other end of a balancer link 46 having one end connected to the slider pin 36 of the horizontal guide 34.
[0028]
Since the balancer link 46 has the same length and the same weight as the knuckle link 43, when the crankshaft 32 rotates, the slider pin 42 and the balancer pin 45 of the vertical guide 40 are perpendicular to the slider pin 42 of the vertical guide 40. Are moved up and down by the same distance in opposite directions. The weight of the dynamic balancer 44 is made substantially equal to the combined weight of the links, the plunger 29 and the slide 30, so that the weight balance between the upper and lower parts of the horizontal guide 34 is achieved. Accordingly, the unbalanced inertial force due to the reciprocating motion of the slide is canceled, and the vibration and deflection of the press machine are reduced.
[0029]
Figure 3 is a partial front view of a press machine 51 illustrating the actual施例of the present invention. The figure shows the state where the slide is at the bottom dead center, and the state of the link when the slide is at the top dead center is indicated by a two-dot chain skeleton. Since the slide drive mechanism is similar to that of the second reference example, only the differences will be described, and the others will be denoted by the same reference numerals and description thereof will be omitted.
[0030]
A balancer guide pin 52 is suspended from an upper portion of the frame 33 of the press machine 51, and a dynamic balancer 44 is mounted on the balancer guide pin 52 so as to be movable up and down. The balancer pin 45 of the dynamic balancer 44 provided directly above the slider pin 42 of the slider 41 inserted and fitted into the vertical guide 40 is connected to the balancer link 53 connected at one end to the slider pin 36 of the horizontal guide 34. the point is that has been consolidated.
[0031]
When the crankshaft 32 rotates and the slider pin 36 of the slider 35 inserted into the horizontal guide 34 to which the small end portion of the connecting rod 37 is connected reciprocates in the horizontal direction, one end is connected to the slider pin 36. The balancer link 53 and the knuckle link 43 thus made swing, but an inertial force is applied to the slider pin 36 at that time. In order to balance this inertial force, unlike the second reference example, the balancer link 53 is further extended upward by the same length, and a balance weight 54 for the knuckle link 43 is provided at the extension end of the balancer link 53. The press machine 51 is balanced in the left-right direction.
[0032]
Further, when the crankshaft 32 rotates, a crankshaft balance weight 55 having a center of gravity in a direction different in phase from the eccentric portion 38 by approximately 180 ° is also provided in order to balance the inertial force by the eccentric portion 38.
[0033]
In the press machine 51 in real施例this occurs when the vertically moving the slide by a pair of knuckle link mechanism can be eliminated in the lateral direction of the imbalance of the press machine.
[0034]
[0035]
[0036]
[0037]
[0038]
[0039]
[0040]
【The invention's effect】
[0041]
In the invention of claim 1 , since the slide is moved up and down by one set of knuckle link mechanisms, the number of links can be reduced. Further, by providing the side of the die height adjusting mechanism on the frame of the press machine, the slide can be reduced in weight, and the slide can be driven at a high speed.
[0042]
The upper end of the knuckle link is connected to the lower end of the balancer link, and the slider pin to which the lower end of the knuckle link is connected and the balancer pin to which the balancer link is connected move up and down in opposite directions, one of which slides. Since the other is driven by the dynamic balancer, the unbalanced inertial force due to the reciprocating motion of the slide is canceled out, and the vibration and deflection of the press machine are reduced, so that highly accurate pressing can be performed.
[0043]
In addition, since the balance weight for the knuckle link is attached to the extension end of the balancer link, the unbalance in the horizontal direction of the press machine that occurs when the slide is moved up and down by one set of knuckle link mechanism is eliminated. Can do.
[Brief description of the drawings]
FIG. 1 is a front view of main parts of a press machine according to a first reference example .
FIG. 2 is a front view of main parts of a press machine according to a second reference example .
3 is a partial front view of a press machine showing the actual施例of the present invention.
[Explanation of symbols]
1 is a press machine, 2 is a crankshaft, 3 is a frame, 4 is a first eccentric part, 5 is a second eccentric part, 6 is a first connecting rod, 7 is a second connecting rod, 8 is a vertical guide, 9 is Slider, 10 is a slider pin, 11 is a balancer guide pin, 12 is a dynamic balancer, 13 is a balancer pin, 15 is a die height adjustment mechanism, 16 is a warm, 17 is a worm wheel, 18 is a screw, 19 is a die height adjustment pin, 21 is a connecting link, 22 is a lateral link, 23 is a connecting pin, 24 is a pin, 25 is a lower link, 28 is a pin, 29 is a plunger, 30 is a slide, 31 is a press machine, 32 is a crankshaft, 33 is a frame, 34 is a horizontal guide, 35 is a slider, 36 is a slider pin, 37 is a connecting rod, 38 is an eccentric part, 40 is a vertical guide, 41 is a slider, 42 Slider pin, 43 knuckle link, 44 dynamic balancer, 45 balancer pin, 46 balancer link, 51 press machine, 52 balancer guide pin, 53 balancer link, 54 balance weight, 55 crankshaft balance Weight, 61 is a press machine, 62 is a fixed fulcrum pin, 63 is an upper link, 64 is a knuckle link, 65 is an intermediate fulcrum pin, 66 is a drive pin, and 67 is a balancer link.

Claims (1)

In a press machine that drives a slide using a link, (a) a crankshaft (32) supported by a frame (33) in the front-rear direction of the press machine (51) , and (b) an eccentric portion (38 ) of the crankshaft ) A connecting rod ( 37 ) having a large end connected to the slider pin (36) and a small end connected to the slider pin (36) ; and (c) a frame (33) in the horizontal direction of the axis of the crankshaft (32). A knuckle link (one end of which is connected to a slider pin (36) attached to a slider (35) slidably fitted in a horizontal guide (34) fixed to 43), (d) provided below the crankshaft (32), fitted to the other end connected to a vertical guide of the slider (attached to the slider pin (42) to the knuckle link 41) (43) One consisting of (40) A pair of knuckle link mechanisms; (e) a pair of left and right connecting links (21, 21) having both ends connected to the slider pin (42) ; and (f) upper and lower provided on the left and right of the frame (33) , respectively. Die height adjustment pins (19, 19) whose position can be adjusted in the direction; ( g ) One end is connected to the die height adjustment pin (19, 19) , and the other end is connected to the other end of the connection link (21, 21). A pair of left and right horizontal links (22, 22) ; (h) a pair of left and right lower links (25 ) with one end connected to the center of the horizontal link (22, 22) and the other end connected to the slide (30) 25) and (re) a dynamic balancer (44) which is movable at the top and bottom of the frame (33) of the press machine (51), and (nu) one end of the slider pin of the horizontal guide (34). (36), etc. A balance machine ( 53) having a balance weight (54) attached to the end and having a midpoint connected to a balancer pin (45) of a dynamic balancer (44). 51) .

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