JPH07178594A - Driving device - Google Patents

Abstract

PURPOSE:To drive a material to be driven at high speed and in a straight line and to apply the material to be driven strong force by exerting the material to be driven by work of a rotating force generating means and a hydraulic type linear driving force generating means. CONSTITUTION:When a motor is exerted, a crank 9 is turned in the clockwise direction and a drivable plate 12 is linearly driven at high speed upward. When the crank 9 is rotated to the terminal state, the upper dead center reached by the drivable plate 12 and an upper metallic die 5 and a lower metallic die 6 are in close contact (temporary tightening), the crank 9 is fixed at the position by braking work of the motor. Thus, when the upper and lower metallic dies are in close contact, hydraulic oil is supplied to a hydraulic cylinder 13, a piston 14 is shifted a little and tightening force is generated between the upper and lower metallic dies 5 and 6 by reaction generated by strain of guide posts 3a-3d. Magnitude of the tightening force is adjusted to be required by controlling pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a drive source for opening and closing molds of transfer molding machines and injection molding machines, various press devices such as press brakes and shear presses, and further compression / tensile testing machines. The present invention relates to a linear drive device used as a drive source for various test devices.

[0002]

BACKGROUND OF THE INVENTION A mold opening / closing drive source of a transfer molding machine is capable of high-speed opening / closing of a mold for improving productivity, and can generate a required tightening force after the mold is closed. Characteristics are required, and conventionally, as a drive device of this type, a drive device mainly composed of a hydraulic pressure or an electric motor has been used.

That is, in the hydraulic drive system, the opening and closing speed of the mold and the tightening force are controlled by controlling the flow rate and pressure of the pressure oil, but it is particularly necessary to open and close the mold at high speed. Due to its nature, a large-capacity hydraulic power source was required, which resulted in high running costs. Further, since the hydraulic circuit becomes so complicated, there is a problem that a failure is likely to occur and frequent maintenance is required.

On the other hand, those using an electric drive device are connected via a ball screw mechanism or the like by using a toggle mechanism whose maximum extension dimension is somewhat larger than the stroke of the movable mold. It is configured to open and close the mold by expanding and contracting the toggle mechanism by the electric motor that has been set.The clamping force of the mold distorts the member by further extending the toggle after closing the mold, and it is generated as this reaction force. You are using the power to do so.

Therefore, this device has a feature that a high-speed opening / closing operation of a mold and a required mold clamping force after the mold is closed can be obtained from a small electric motor. However, it is difficult to say that the toggle mechanism, which consists of many members connected intricately, has sufficient repeatability accuracy.In addition, it causes errors due to deformation of the members and rattling due to temperature changes, so it is stable over a long period of time. In many cases, the operation cannot be expected, and it is very difficult to change the tightening force.

[0006]

DISCLOSURE OF THE INVENTION It is an object of the present invention to enable a driven body to be linearly driven at a high speed, to apply a large force to the driven body, and to have a low running cost and to prevent failures. Furthermore, it has excellent controllability, and when used in various manufacturing equipment, it can improve production efficiency, reduce manufacturing cost, improve product quality, and when used in various testing equipment. Is to provide a drive device capable of obtaining test results quickly and with high accuracy.

An object of the present invention is to provide a driving device for applying a linear driving force to a driven body to drive the driven body in a straight line, the rotational force generating means and the rotational force generating means. A crank mechanism for converting a rotary motion into a linear motion and a hydraulic linear drive force generating means are provided, and the driven body is operated by the action of the rotary force generating means and the linear drive force generating means. It is achieved by a driving device characterized by being configured.

A driving device for linearly driving the driven body by applying a linear driving force to the driven body, wherein the rotational force generating means and the rotational movement of the rotational force generating means are linearly moved. And a hydraulic linear driving force generating means interposed between a reciprocating portion of the crank mechanism and the driven body. It

Further, resin is filled in a space formed by the first mold, a second mold provided so as to face the first mold, and the first mold and the second mold. A resin filling mechanism, a rotational force generating means, a crank mechanism for converting the rotational movement of the rotational force generating means into a linear movement, and a liquid interposed between the reciprocating portion of the crank mechanism and the first die. A drive unit comprising a pressure type linear driving force generating means, and the first mold is operated by the action of the rotational force generating means and the linear driving force generating means. Molding device).

Further, a pressing member that comes into contact with the workpiece, a rotational force generating means, a crank mechanism that converts the rotational movement of the rotational force generating means into a linear movement, a reciprocating portion of the crank mechanism, and the pressing member. And a hydraulic linear driving force generating means interposed between the pressing force and the rotational force generating means and the linear driving force generating means. This is achieved by a characteristic drive device (press brake device).

Further, a shearing blade portion which comes into contact with the work material, a rotational force generating means, a crank mechanism which converts the rotational movement of the rotational force generating means into a linear movement, a reciprocating portion of the crank mechanism and the shearing force. A hydraulic linear drive force generating means interposed between the blade portion and the blade portion, and the shear blade portion is operated by the action of the rotational force generating means and the linear drive force generating means. Is achieved by a driving device (shearing device).

Further, a pressure contact (holding) member for transmitting a compressive (tensile) force to the material under test, a rotational force generating means, and a crank mechanism for converting the rotational movement of the rotational force generating means into a linear movement. A hydraulic linear drive force generating means interposed between the reciprocating portion of the crank mechanism and the pressure contact (sandwiching) member is provided, and receives the action from the rotational force generating means and the linear drive force generating means. It is achieved by a driving device [compression (tensile) testing device] characterized in that the pressure contact (holding) member is configured to operate.

However, in the above drive device and the drive device applied to a molding device, a press brake device, a shearing device, and a compression (tensile) test device, the hydraulic linear drive force generating means is not necessarily used for the crank mechanism. It is not necessary to intervene between the reciprocating part of the and the various action members,
For example, a hydraulic linear driving force generating means, a crank mechanism (reciprocating portion), and various action members may be arranged subsequently thereto, that is, these are arranged mechanically in series and the driving force is It suffices if it is configured to transmit linearly.

That is, in the drive device constructed as described above, the driven body can be linearly driven at a high speed by the action of the crank mechanism in a section where a large drive force is not required, and a large drive force is generated. In the required section, particularly in the stroke after the linear driving of the driven body by the crank mechanism is completed, a large driving force can be applied to the driven body by the hydraulic linear driving force generating means.

Moreover, by adopting the crank mechanism, the driving source for linearly driving the driven body is small,
The energy consumption is small, and the running cost is low, and since the structure is simple, it is hard to cause a failure, and the error caused by the rattling of the members is small. Since the force is applied, the control of the driving force is extremely easy.

Therefore, when the drive device of the present invention is used as a drive source for a manufacturing device such as a molding machine, the mold can be opened and closed at high speed, and the mold can be accurately tightened with a required force. Also, when the drive device of the present invention is used as a drive source for a press brake device or a shear press device, a member that abuts against a work piece can be driven at high speed and is suitable for the work piece. Since force can be applied, production efficiency can be improved, manufacturing cost can be reduced, and product quality can be improved.

Further, even when the driving device of the present invention is used as a driving source for various testing devices, it is possible to quickly obtain highly accurate test results due to the characteristics as described above. In the drive unit of the present invention, the reciprocating portion is configured to reciprocate linearly within the stroke length obtained by rotating the crank from the position where the tip of the crank is at the bottom dead center to the top dead center. Preferably, the stroke of the reciprocating portion is maximized, and the space is effectively used, so that the device can be further downsized.

Further, it is preferable that an electric motor via a speed reducer is used as the rotational force generating means, and a hydraulic cylinder is used as the hydraulic linear drive force generating means. In addition, it is preferable to include a lock mechanism configured to lock the position of the crank when the reciprocating portion exists near the maximum stroke. For example, the lock mechanism is perpendicular to the rotation surface of the crank. Provided with a stopper that comes into contact with a predetermined position of the crank, or that is capable of projecting and retracting vertically to the rotation surface of the crank and is in contact with the predetermined position of the crank in the projecting state. It is possible to adopt the one provided with a stopper provided so as to be in contact with
With this locking mechanism, buckling does not easily occur even when a large reaction force acts on the reciprocating portion, and stability is high.

[0019]

1 to 5 relate to a first embodiment of the present invention. FIG. 1 is a front view of a transfer molding machine, FIG. 2 is a side view of the transfer molding machine, and FIGS. It is a front view which shows the operating condition of a molding machine. In each drawing, 1 is a base plate, 2 is a fixed platen, and four equal-length guide columns 3a to 3d (3c is not shown) are provided between the base plate 1 and the fixed platen 2. .

Reference numeral 4 denotes a movable platen arranged on the guide columns 3a to 3d so as to be slidable in the vertical direction, and includes an upper die 5 attached to the fixed platen 2 and a lower die attached to the movable platen 4. A space for resin molding is created by 6. A device for injecting resin into the mold space is provided below the lower mold 6, but it is omitted here.

Reference numeral 7 is an electric motor, 8 is a speed reducer (the electric motor 7 and the speed reducer 8 are not shown except FIG. 2), 9 is a crank, and 10 is a crank.
Reference characters a and 10b are supports for supporting the crank 9. 1
Reference numeral 1 is a connecting rod, 12 is a movable plate vertically movable on the guide columns 3a to 3d, the lower end of the connecting rod 11 is at the tip of the crank 9, and the upper end of the connecting rod 11 is at the movable plate 12. It is rotatably connected to the bottom.

Reference numeral 13 is a hydraulic cylinder fixed on the movable plate 12, and 14 is a piston that abuts on the bottom of the movable platen 4. In particular, the hydraulic cylinder 13 is of a short stroke type having an inner diameter larger than the stroke of the piston 14. It is configured such that a large driving force can be generated when the molds 5 and 6 are clamped. That is, in the main part of the driving device including the crank mechanism and the hydraulic mechanism as described above, the crank 9 is rotated by operating the electric motor 7, and the action of the crank 9 linearly drives the movable plate 12 in the vertical direction. It is supposed to be done. The hydraulic cylinder 13 fixed on the movable plate 12 is configured to operate by receiving pressure oil supply from a hydraulic source (not shown) after the movable plate 12 reaches the top dead center. .

Therefore, as will be described in detail below, during the mold opening / closing operation, the load is small, so that the mold can be opened and closed at high speed.
When the mold is closed and a large force is required, a predetermined tightening force can be applied to the mold.
Since the crank 9 rotates 180 ° from the position where the tip of the crank 9 reaches the bottom dead center to the top dead center, the stroke of the movable plate 12 is twice the axial distance of the crank 9. is there.

The operating conditions of the transfer molding machine in this embodiment are as shown in FIGS. However,
3 to 5, the crank mechanism portion is shown in a sectional state for convenience. That is, in the stage before the molding is started, as shown in FIG. 3, the mold is in a fully opened state, and therefore the tip of the crank 9 is at the bottom dead center.
Moreover, the hydraulic oil is not supplied to the hydraulic cylinder 13, and the piston 14 is descending.

Next, when the electric motor 7 is operated, the crank 9
Is rotated clockwise as shown in FIG. 4, and the movable plate 12 is linearly driven upward at high speed. When the crank 9 rotates to the final state, the movable plate 12 reaches the top dead center, and the upper die 5 and the lower die 6 come into close contact (temporary fastening) as shown in FIG. It is fixed in that position by the braking action of 7.

In the maximum stroke state of the movable plate 12, the crank 9 and the connecting rod 11 are positioned on a straight line so that even if a large reaction force acts on the movable plate 12, this will cause the crank 9 to move. It is not converted into rotational movement, and highly stable support that does not cause buckling is provided. Instead of fixing the crankshaft by the braking action of the electric motor 7, for example, at the position where the tip of the crank 9 is at the top dead center, stoppers 10a, 10b that abut the crank 9 and prevent its rotation are supported.
The crank 9 can be more effectively fixed if the crank 9 is provided on the inward surface so that it can project and retract.

When the upper die 5 and the lower die 6 are brought into close contact with each other in this manner, pressure oil is supplied to the hydraulic cylinder 13 to slightly displace the piston 14 and the guide columns 3a to 3d.
Of the upper mold 5 and the lower mold 6 due to the reaction force generated by the distortion of
A clamping force is generated between the and, which is adjusted to the required magnitude by controlling the pressure. In the transfer molding machine of the present embodiment, the crank mechanism bears the operation in the section that does not require a large driving force, while the hydraulic mechanism only bears the section that requires a large driving force after the mold is closed. The hydraulic pressure source may be a small one, and at the same time the mold can be opened and closed at high speed without using an electric motor with a larger capacity than necessary. The reason is as follows.

That is, the driving force required for linearly driving the movable plate 12 upward varies greatly depending on the rotation angle of the crank 9. For example, when the movable plate 12 is at the top / bottom dead center, the crank 9 is driven. The reverse torque acting (torque in the opposite direction to the crank rotation direction, which is generated by the weight of the movable part) is small, and thus the rotation of the electric motor 7 is not hindered.

Therefore, when the operation of closing the mold is started from the fully opened state, even if the inertial resistance and the frictional resistance of the sliding contact portion are added in order to accelerate the movable portion (reciprocating portion and rotating portion). The crank 9 easily starts rotating.
Further, even when the mold is completely closed and the movable plate 12 reaches the top dead center, the resistance required for temporary tightening of the mold is added, but this also does not hinder the rotational movement of the electric motor 7.
The crank 9 easily rotates to the final position.

In other words, the operation of the crank mechanism enables high-speed opening and closing of the mold without using an unnecessarily large electric motor, and power consumption can be kept small. As described above, in the transfer molding machine of the present embodiment, the mold can be opened and closed at high speed, and accurate tightening can be performed with a required force, so that production efficiency can be improved and product quality can be improved. Further, the mechanism is simple, and since it is driven by a small electric motor, failure is unlikely to occur, running cost is low, and deterioration of the working environment due to vibration and noise is prevented.

FIG. 6 relates to the second embodiment of the present invention.
It is a side view of an injection molding machine. However, the members having the same numbers as those in the first embodiment have the same functions as those in the above transfer molding machine. Figure 6
In the figure, 15 is a movable mold, 16 is a fixed mold, 17 is an injection unit composed of a resin plasticizing mechanism, an injection mechanism, etc. The nozzle portion of this injection unit 17 is a movable mold 15
And a fixed mold 16 are combined to communicate with a space obtained.

Reference numeral 18 is a hopper filled with injection molding resin, and 19 is a pedestal to which the injection unit 17 and the drive unit main body are fixed. In this injection molding machine, after the molds 15 and 16 are closed, a resin is injected into the mold by an injection unit 17 and molded into a predetermined shape. The mold opening / closing operation is performed by a crank mechanism and a hydraulic mechanism. It is performed by the drive device.

The operating condition of the driving device is the same as that of the transfer molding machine, and therefore will be omitted. FIG. 7 is a side view of the brake press device according to the third embodiment of the present invention, and like FIG. 6, members given the same numbers as in the first embodiment are those in the above transfer molding machine. Is a member having the same function as the
The same applies to the fifth embodiment. ) In FIG. 7, 20 is a movable upper mold, 21 is a fixed lower mold, and 22 is a work (material to be molded). That is, this brake press device pushes the movable upper mold 20 downward by the operation of the drive device. Thus, the work 23 sandwiched between the movable upper and lower molds 20, 21 is plastically deformed to form a predetermined shape.

The operating condition of the drive device in this brake press device is also the same as that of the transfer molding machine, and therefore will be omitted. FIG. 8 is a side view of the shear press device according to the fourth embodiment of the present invention.
Reference numeral 23 is an upper shear blade portion, 24 is a lower shear blade portion, and 25 is a work (material to be sheared). That is, this shear press device pushes the upper shear blade portion 23 downward by the operation of the drive device, and The work 25 sandwiched between the upper shearing blade portion 23 and the lower shearing blade portion 24 is sheared into a predetermined shape.

The operating condition of the drive unit in this shear press machine is also the same as that of the transfer molding machine, and therefore will be omitted. FIG. 9 is a side view of a compression test apparatus according to a fifth embodiment of the present invention. In FIG. 9, 26 is a pressing member, 27 is a test piece (test material) holding member,
Reference numeral 28 denotes a test piece, that is, this compression test device pushes the pressing member 26 downward by the operation of the drive device, and thereby applies a predetermined compressive force to the test piece 28 held by the test piece holding member 27. To do.

The operating condition of the drive unit in this compression test apparatus is also the same as that of the transfer molding machine, and will therefore be omitted. When the driving device of the invention is used as a driving source for various press devices such as an injection molding machine, a press brake, a shear press, and a compression (tensile) tester as in the second to fifth embodiments. Even if there is a first
Similar to the embodiment, the production efficiency can be improved, the manufacturing cost can be reduced, and the quality of the product can be improved. Moreover, the test can be performed quickly and accurately, and a good test result can be obtained.

[0037]

According to the present invention, the driven body can be linearly driven at a high speed, a required force can be applied to the driven body, the running cost is low, and a failure occurs. Is less likely to occur, and has excellent controllability, and when used in various manufacturing equipment, it can improve production efficiency, reduce manufacturing cost, improve product quality, and use it in various testing equipment. In some cases, test results can be obtained quickly and with high accuracy.

[Brief description of drawings]

FIG. 1 is a front view of a transfer molding machine.

FIG. 2 is a side view of a transfer molding machine.

FIG. 3 is a front view showing an operating state of the transfer molding machine.

FIG. 4 is a front view showing an operating state of the transfer molding machine.

FIG. 5 is a front view showing an operating state of the transfer molding machine.

FIG. 6 is a side view of the injection molding machine.

FIG. 7 is a side view of the brake press device.

FIG. 8 is a side view of the shear press device.

FIG. 9 is a side view of the compression test apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base plate 2 Fixed platen 3a-3d Guide pillar 4 Movable platen 5 Upper mold 6 Lower mold 7 Electric motor 8 Speed reducer 9 Cranks 10a, 10b support 11 Connecting rod 12 Movable plate 13 Hydraulic cylinder 14 Piston

Claims (12)

[Claims] 1. A driving device for linearly driving a driven body by applying a linear driving force to the driven body, wherein the rotational force generating means and the rotational movement of the rotational force generating means are linearly moved. And a hydraulic linear drive force generating means, and the driven body is operated by the action of the rotational force generating means and the linear drive force generating means. A drive device characterized by. 2. A driving device for linearly driving a driven body by applying a linear driving force to the driven body, wherein the rotational force generating means and the rotational movement of the rotational force generating means are linearly moved. A drive device comprising: a crank mechanism for converting into a crank mechanism; and a hydraulic linear drive force generating means interposed between a reciprocating portion of the crank mechanism and the driven body. 3. A resin is filled in a space formed by the first mold, a second mold provided so as to face the first mold, and the first mold and the second mold. A resin filling mechanism,
A rotational force generating means, a crank mechanism for converting the rotational movement of the rotational force generating means into a linear movement, and a hydraulic linear driving force interposed between the reciprocating portion of the crank mechanism and the first die. A drive unit, which is configured to operate by the action of the rotational force generation unit and the linear drive force generation unit. 4. A pressing member that comes into contact with a workpiece, a rotational force generating means, a crank mechanism that converts the rotational movement of the rotational force generating means into a linear movement, a reciprocating portion of the crank mechanism, and the pressing member. And a hydraulic linear driving force generating means interposed between the pressing force and the rotational force generating means and the linear driving force generating means. Characteristic drive device. 5. A shearing blade portion that comes into contact with a work material, a rotational force generating means, a crank mechanism that converts the rotational motion of the rotational force generating means into a linear motion, a reciprocating portion of the crank mechanism, and the shearing force. A hydraulic linear drive force generating means interposed between the blade portion and the blade portion, and the shear blade portion is operated by the action of the rotational force generating means and the linear drive force generating means. A drive device characterized by the following. 6. A pressure contact (holding) member for transmitting a compressive (tensile) force to the material under test, a rotational force generating means, and a crank mechanism for converting the rotational movement of the rotational force generating means into a linear movement. A hydraulic linear drive force generating means interposed between the reciprocating portion of the crank mechanism and the pressure contact (sandwiching) member is provided, and receives the action from the rotational force generating means and the linear drive force generating means. The drive device is characterized in that the pressure contact (holding) member is operated. 7. The reciprocating portion is configured to reciprocate linearly for a stroke length obtained by rotating the crank until the tip of the crank reaches the top dead center from the position at the bottom dead center. The drive device according to any one of claims 1 to 6, wherein: 8. The drive device according to claim 1, wherein an electric motor via a speed reducer is used as the rotational force generating means. 9. A hydraulic cylinder is used as the hydraulic linear drive force generating means.
The drive device according to claim 8. 10. The drive according to claim 1, further comprising a lock mechanism configured to lock the position of the crank when the reciprocating portion exists near the maximum stroke. apparatus. 11. The lock mechanism comprises a stopper that is provided perpendicularly to the surface of rotation of the crank and is in contact with a predetermined position of the crank.
Drive. 12. The lock mechanism is provided with a stopper that is capable of projecting and retracting perpendicularly to the crank rotation surface, and that is provided so as to contact a predetermined position of the crank in the projecting state. 11. The method according to claim 10,
Drive.