JPH0645051B2 - Mold positioning device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold positioning device for various molding machines, and to a mold positioning device capable of positioning and simultaneously fixing a mold mounted on a base member. .

[Prior art]

For example, when positioning and fixing a pair of split dies to a press device so as to correspond to predetermined positions of a ram and a bolster, the left and right of the dies to be carried in and fixed in advance by using T grooves of the bolster plate. The pair of pins and the like for receiving and positioning the side wall portion and the rear side wall portion of the mold are provided, and the mold conveyed to the front surface of the bolster by a conveying means such as a forklift or a mold conveying carriage is inserted from the front end portion of the bolster plate into the metal mold. Pushing inward while regulating the position with the pins etc. provided on the left and right side wall parts of the mold, and positioning by contacting the rear side wall part of the mold with the pins etc. arranged side by side on the back side of the bolster plate. To do. After that, the lower mold is fixed to the bolster and the upper mold is fixed to the ram by using fixing means such as a clamp device provided separately for the bolster and the ram.

Alternatively, a delivery amount control mechanism such as a die loading / unloading mechanism attached to another die transporting machine or the like provided for delivering the die between the die delivery carriage and the bolster is used together. It may be positioned.

[Problems to be solved by the invention]

In the above-mentioned conventional technique, a position regulating means such as a pin has to be provided in advance at a predetermined die mounting position on a base member such as a bolster of a pressing device, separately from the die fixing means. Due to the problem that it takes time and the difference in the size of the mold, it is necessary to install it so that it can be moved to accommodate various molds. There is a problem that the position of the means is displaced or damaged, and it is necessary to push the mold without slipping so that it comes into contact with the position regulating means such as the above pins when carrying in the mold, so that skill is required for work. There is a problem that it takes a lot of time to position the die.

Further, when a device such as the above-described mold transfer vehicle or an automatic mold loading / unloading mechanism attached to the transfer device is also used, there is a problem that a new cost will be required if such a device is newly provided.

For these reasons, there has been a demand for a mold positioning device having a low cost and a simple structure.

[Means for solving problems]

The mold positioning device according to the present invention includes at least a pair of first hydraulic pressures for symmetrically pressing corresponding side portions of a mold placed on a base member from both sides to position the mold in a first direction. A cylinder and at least a pair of second hydraulic cylinders that symmetrically press the corresponding side portions of the mold facing the second direction orthogonal to the first direction from both sides to position the mold in the second direction; The pressure working chambers individually connected to the first hydraulic cylinders are composed of a plurality of pressure increasing parts arranged in series with each other, and a common drive part for synchronously driving the pistons of these pressure increasing parts. A plurality of pressure boosters in which the first multi-stage synchronous hydraulic pressure supply device and the pressure working chambers individually connected to the respective second hydraulic cylinders are arranged in series with each other, and these pressure boosters Second multi-stage synchronous hydraulic pressure supply device comprising a common drive unit for synchronously driving pistons It is those with a door.

[Action]

In the mold positioning device according to the present invention, when the drive unit of the first multi-stage synchronous hydraulic pressure supply device is driven, the pistons of the plurality of pressure increasing units are synchronously driven, and the pressure working chambers of the pressure increasing units are moved from Pressure oil of the same pressure and the same flow rate is supplied to each first hydraulic cylinder, and at least one pair of first hydraulic cylinders is driven synchronously. Thereby, the mold is at least 1 in the first direction.
It will be positioned at the intermediate position of the pair of first hydraulic cylinders.

This also applies to the second multi-stage synchronous hydraulic supply device and the second hydraulic cylinder. When the drive unit of the second multi-stage synchronous hydraulic supply device is driven, at least one pair of second hydraulic cylinders are synchronously driven. To be done. As a result, the mold is positioned at the intermediate position of the at least one pair of second hydraulic cylinders in the second direction.

Therefore, the first hydraulic cylinder can be operated simply by loading the mold into the area surrounded by the first and second hydraulic cylinders arranged on the base member and operating the first and second multi-stage synchronous hydraulic supply devices. Positioning of the mold in the first direction is performed by the second hydraulic cylinder, and in parallel with this, positioning of the mold in the second direction is performed.

〔The invention's effect〕

According to the mold positioning apparatus of the present invention, as described above, the mold is carried into the area surrounded by the first and second hydraulic cylinders on the base member by using some kind of conveying means. By operating the second multi-stage synchronous hydraulic pressure supply device, it is possible to easily perform the mold positioning work in a short time.

When the mold is loaded, the piston rods of the first and second hydraulic cylinders are retracted out of the mold fixing region, so that the mold can be loaded efficiently.

Further, the molds of various sizes can be positioned without changing the positions of the first and second hydraulic cylinders, which is excellent in versatility and is suitable for automation and labor saving of mold replacement.

〔Example〕

Hereinafter, the mold positioning device of the present invention will be described with reference to the drawings.

FIG. 1 shows a mold positioning device 50 mounted on a bolster 2 of a C-shaped press device 1. The front, rear, left and right are defined as shown in the drawings and will be described below.

In FIG. 2, the mold positioning device 50 is the bolster 2
Positioning with two pairs of first clamp mechanism that symmetrically presses the corresponding left and right side portions facing the left-right direction (first direction) of the die W placed on the top side from both sides to position and fix in the left-right direction The unit 10, two pairs of second positioning units 20 that symmetrically press the front and rear side portions of the corresponding mold W facing each other in the front-rear direction (second direction) orthogonal to the unit 10, and the positioning with the first clamp mechanism The first multi-stage synchronous hydraulic pressure supply device 30 (hereinafter referred to as a first booster) having a pressurization working chamber that is individually connected to each cylinder of the unit 10 via a hydraulic path 30a, and the second positioning unit 20. A second multi-stage synchronous hydraulic supply device 40 (hereinafter referred to as a second booster) having a pressurizing working chamber that is individually connected to each cylinder via a hydraulic passage 40a.

The positioning units 10 and 20 are mounted on the bolster 2 so as to be slidable along the T-grooves 2a formed vertically and horizontally on the bolster 2.

The four positioning units with the first clamp mechanism 10 are self-propelled units 10 as shown in FIG. 3, FIG. 4, and FIG.
The self-propelled unit 10A is composed of A and a fixed unit 10B as follows.

Since the left side positioning unit 10 and the right side positioning unit 10 of the mold W are symmetrical, the right side will be described. The clamp lever 12 is supported by a pair of pivot brackets 11a that are erected on the upper surface of the left end of the housing 11. The clamp lever 12 is swingably pivoted, and a force point portion 12a is formed at the right end portion of the clamp lever 12 and an action point portion 12b protruding leftward from the housing 11 is formed at the left end portion.
A hydraulic cylinder 14 for clamping is provided upright in the housing 11 below a and the piston rod 1
The force point portion 12a is clamped upward by the upper end portion of 4a so that the action point portion 12b presses the mold W downward to clamp it. The clamping hydraulic cylinder 14 is a single-acting hydraulic cylinder that is returned by a return mechanism including a flanged rod 15 and a spring 15a, and an oil hole 14b connected to a pressurizing oil chamber below the hydraulic cylinder 14 is connected to a hydraulic supply device (not shown). ing. In addition, in the lower part of the housing 11, the T groove 2a is formed.
The leg portion 11b slidably fitted to is integrally formed.

On the other hand, the self-propelled unit 10 is provided in the center of the housing 11.
A single-acting hydraulic cylinder 16 for moving A in the left-right direction and for positioning the mold W is horizontally provided in the left-right direction, and the piston rod 16c of the hydraulic cylinder 16 is located outside the right end of the housing 11. A pressure receiving chamber 16a is formed on the left side of the piston 16b, and a powerful compression spring 16d for returning is externally fitted to the piston rod 16c on the right side of the piston 16b. 16e is formed, and each pressure receiving chamber 1
6a is connected to the pressurizing working chamber 66 of each pressure boosting portion of the first booster 30 via the oil hole 16e and the hydraulic passage 30a, as shown in FIG. Furthermore, the housing 11 is formed with an abutting portion 11c which is provided so as to abut the die W at the lower portion of the left end surface thereof.

The fixed unit 10B includes a piston rod mounting block 17 for horizontally screwing the tip end portion of the piston rod 16c of the hydraulic cylinder 16 of the self-propelled unit 10A at the left end portion, and a vertical direction from the upper end surface of the piston rod mounting block 17. It is composed of a bolt 18a which is penetrated through and a fastening tool 18 which is screwed and fitted into the T groove 2a of the bolster 2, and can be fixed by tightening the bolt 18a. In addition, the lower end surface of the piston rod mounting block 17 is provided with a steady rest 17a slidably fitted on the upper portion of the T groove 2a so that the rod mounting block 115 does not swing. .

On the other hand, the four second positioning units 20 are configured as shown in FIG. 2, and since the rear side and the front side of the mold W are symmetrical, the rear side will be described.

In the center of the housing 21, a single-acting hydraulic cylinder 26 for positioning the mold W is horizontally provided in the front-rear direction, and the piston rod 26c of the hydraulic cylinder 26 is located outside the front end of the housing 21. Extend and piston 2
A pressure receiving chamber 26a is formed on the rear side of 6b, a return spring 26d is externally fitted to the piston rod 26c on the front side of the piston 26b, and an oil hole 26e communicating with the pressure receiving chamber 26a is formed on the housing 21. Each pressure receiving chamber 26a has an oil hole 2
6e and the hydraulic passage 40a are connected to the pressurizing working chamber 66 of each pressure boosting portion of the second booster.

Further, at the lower end portion of the housing 21, a steady rest portion (not shown) slidably fitted on the upper portion of the T groove 2a in the left-right direction of the bolster 2 is provided. The second positioning unit 20 has two left and right bolts 22 that vertically penetrate the housing 21 from the upper end surface of the housing 21.
It is screwed to a fastener (not shown) fitted inside the groove 2 a, and is fastened to the bolster 2 by being fastened with a bolt 22.

Further, the second positioning unit 20 on the front side of the mold W is the mold W
When carrying in and out of the bolster 2, the bolt 22 can be loosened and moved to the position shown by the phantom line in the figure.

6 and 7 show the first booster 30 connected to the four positioning units 10 with the first clamp mechanism.

The first booster 30 includes a casing 60 and four cylindrical cylinder chambers 62 formed in series inside the casing 60.
And a piston 63 slidably mounted in each cylinder chamber 62, a connecting shaft 64 that integrally connects the four pistons 63, and four pistons 63 are reciprocally synchronously driven via the connecting shaft 64. Drive means 65 for

The casing 60 corresponds to each cylinder chamber 62.
The casing division body 60A is divided and formed into individual casing division bodies 60A, and each casing division body 60A is integrally configured by a partition wall portion 60a forming an upper end wall of the cylinder chamber 62 and a peripheral wall portion 60b forming a peripheral wall of the cylinder chamber 62. . These four casing divided bodies 60A are vertically stacked and fastened to the casing 70 of the air cylinder 65 as a driving means by four through bolts 82 as shown in FIG.
The four cylinder chambers 62 have the same inner diameter D _{1 and} the same length.

A pressurizing working chamber 66 is defined above the piston 63 in each cylinder chamber 62, and each pressurizing working chamber 66 and the hydraulic passages 30a connected thereto and the hydraulic cylinder 16 at the end of the hydraulic passage 30a receive pressure. The hydraulic oil is filled over the chamber 16a. The suction / discharge port 68 that connects the hydraulic passage 30a and the pressurizing working chamber 66 is opened at the upper end of the inner peripheral surface of the pressurizing working chamber 66 by penetrating the peripheral wall portion 60b of each cylinder chamber 62. Further, a portion of each cylinder chamber 62 that is partitioned below the piston 63 is provided with an atmosphere communication hole 69 formed in the partition wall 60 a of the cylinder chamber 62 so that the internal pressure does not become negative when the piston 63 rises. Is in communication with the atmosphere.

The upper end wall 70a of the casing 70 of the drive means 65 also serves as the lower end wall of the casing 60.
An atmosphere communication hole 69 of the lowermost cylinder chamber 62 is formed at.

On the upper surface of each piston 63, a spacer 71 that defines the interval between the pistons 63 is integrally formed. Thickness and outer diameter of four pistons 63, length of spacer 71 (height)
And the outer diameter D ₂ are the same. The upper end of each spacer 71 penetrates the partition wall portion 60a of the cylinder chamber 62 and is fitted into a recess formed in the lower surface of the piston 63 above it. 4 pistons 63 and spacers 71
A shaft hole 64a is formed over the entire length in the center of the shaft, and a connecting shaft 64 made of a through bolt is inserted into the shaft hole 64a.
The lower part of the connecting shaft 64 is the piston 7 of the air cylinder 65.
2 and this and the piston 63 in the lowermost cylinder chamber 62
Is inserted through the spacer 72 that defines the interval between the nut 7 and
By tightening together with 4, the four pistons 63, the spacer 71, the spacer 73, and the piston 72 are coaxially and integrally connected.

The air cylinder 65 is a single-acting air cylinder having a return compression spring 77. The cylindrical casing 70 has upper and lower ends closed, a cylinder chamber 75 formed therein, and the cylinder chamber 75. A piston 72 slidably mounted on the piston 72 and the piston 72 in the cylinder chamber 75.
It is provided with a pressure receiving chamber 76 defined on the lower side and a compression spring 77 mounted on the upper side of the piston 72. Cylinder chamber 7
5 is communicated with the atmosphere through an atmosphere communication hole 78 penetrating the peripheral wall of the casing 70, and compressed air is supplied to and discharged from the pressure receiving chamber 76 via the suction / discharge port 79a. The device 79 is connected.

When the control sequence is started manually or automatically, the compressed air supply / discharge device 79 supplies compressed air of a predetermined pressure to the pressure receiving chamber 76, drives the piston 72 upward, and connects the piston 72 and the connecting shaft. 4 pistons 6 through 64
3 is synchronously driven upward.

On the other hand, the second booster 40 connected to the four second positioning units 20 has the same structure as the first booster 30.

According to the mold positioning device 50 configured as described above, the two second positioning units 20 in which the mold W to be positioned are arranged side by side on the front side of the board of the bolster 2 are provided.
The mold W is moved to the position indicated by the phantom line in the figure.
Of the above-mentioned two second positioning units 2 which have been moved into position within the range surrounded by the first positioning unit 10 with a clamping mechanism and the second positioning unit 20.
The zeros are moved and fixed to the original positions that are symmetrical with the two corresponding second positioning units 20 arranged side by side at the rear. When the compressed air supply / exhaust devices 79 of the first booster 30 and the second booster 40 are respectively operated, compressed air is supplied to the pressure receiving chamber 76 of the cylinder chamber 75 in the first booster 30, and the piston 63 rises. And the connecting shaft 6
Each of the four pistons 63 is driven to be synchronously raised via 4. Then, pressurized oil is supplied from each pressurizing working chamber 66 to each hydraulic cylinder 16 of the positioning unit 10 with the first clamp mechanism via the hydraulic passage 30a. Here, the inner diameters D ₁ of the four cylinder chambers 62 of the first booster 30 and the outer systems D ₂ of the spacers 71 of the four pistons 63 are formed to be the same, and the four pistons 63 are connected via the connecting shaft 64. Since the strokes are the same because they are integrally connected, the pressure oils of the same pressure and the same flow rate are supplied from the two pressurizing working chambers 66 to the hydraulic passage 30a in synchronization. , Positioning unit 10 with first clamp mechanism
Each pressure receiving chamber 16a of each hydraulic cylinder 16 is supplied with the same pressure and the same flow rate of pressure oil, and each piston rod 16c
The advance speed and the advance amount of are exactly the same. In parallel with this, the second booster 40 also operates in the same manner, and the hydraulic cylinders 26 of the second positioning unit 20 operate synchronously so that the advancing speed and the advancing amount of each piston rod 26c become exactly the same.

Therefore, the mold W placed on the bolster 2 has four first molds.
Hydraulic cylinder 1 of positioning unit 10 with clamp mechanism
When the piston rod 16c of 6 advances, the self-propelled unit 10A slides straight while sliding on the bolster 2.
The contact portion 11c of the housing 11 contacts the mold W and is positioned in the first direction, and is positioned in the second direction by the hydraulic cylinders 26 of the four second positioning units 20. When the positioning in the two directions is completed, the mold W is fixed at a predetermined position shown by an imaginary line in FIG. 2, and the hydraulic pressure (not shown) connected to the clamping cylinders of the four positioning units 10 with the first clamping mechanism. By operating the supply device to supply pressure oil from the oil hole 14b, the piston rod 14a is driven to move upward, and the force point portion 12a of the clamp lever 12 is pushed up, so that the action point portion 12b presses the mold W downward. It will be fixed. Then, the upper mold is also fixed by the fixing means provided on the ram 3 side. When the fixing work is completed, pressure is released through the suction / discharge port 79a in the pressure receiving chamber 76 of the driving means 65 of the second booster 40, and the hydraulic cylinder 26 of the second positioning unit 20 is released. I don't care. In this case, the urging force of the spring 77 causes the piston 77 to
And the respective pistons 63 descend synchronously via the connecting shaft 64, so that the same amount of pressure oil is supplied from the respective pressure receiving chambers 26a of the respective hydraulic cylinders 26 of the second positioning unit 20 to the respective pressurizing working chambers. Then, the rod 26c is contracted by the urging force of the spring 26d of the hydraulic cylinder 26.

When the mold W is replaced, the ram 3 is lowered to bring the upper mold and the lower mold into contact with each other to release the mold fixing means of the ram 3 and the positioning unit 10 with the first clamp mechanism.
When the clamping hydraulic cylinder 14 is depressurized to release the clamp, and the driving means 65 of the first booster 30 depressurizes the second booster 40 in the same manner as the second booster 40, each positioning unit 10 with the first clamp mechanism. The self-propelled unit 10A retracts and separates from the mold by the urging force of the return spring 16d provided in the hydraulic cylinder 16. Then, the two second positioning units 20 arranged side by side on the front panel of the bolster 2 are moved to the position 27 and the mold W is carried out.

Positioning unit 10 with the first clamp mechanism of the above embodiment
By using, the positioning of the mold W in the left-right direction and the setting of the clamp mechanism near the mold W can be performed at the same time, and the positioning unit can be released and the clamp mechanism can be retracted at the same time.

Here, the above embodiment may be partially modified as follows.

(1) In the above embodiment, four sets of the positioning unit with the first clamp mechanism 10 were used for positioning the mold W in the left-right direction, but the positioning unit 10 is not necessarily constructed separately from the clamp mechanism. Good. That is, the same as the second positioning unit 20 may be used as the first positioning unit 10.

(2) The hydraulic cylinder 16 of the first positioning unit 10 is a double-acting hydraulic cylinder, and hydraulic pressure is supplied to and discharged from another hydraulic pressure supply system to the rod-side oil chamber for return.

(3) When the strokes for positioning the first positioning unit 10 and the second positioning unit 20 are set to be the same, the first booster 30 and the second booster 40 are integrated into an eight-stage synchronous booster to make the first stroke. Also, the second positioning units 10 and 20 can be driven synchronously.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a perspective view of a bolster of a press machine, a ram, and a mold positioning device assembled to the bolster, and FIG. 2 is a plan view of the bolster and the mold positioning device. FIG. 3 is a plan view of the positioning unit with the first clamp mechanism, FIG. 4 is a view taken along arrow IV in FIG. 2, FIG. 5 is a view taken along arrow V in FIG. 2, and FIG. A longitudinal sectional view and FIG. 7 are plan views of the same. W ... Mold, 2 ... Bolster, 10 ... Positioning unit with first clamp mechanism, 20 ... Second positioning unit, 30 ... First booster, 40 ... Second booster.

Claims (1)

[Claims] 1. A pair of first hydraulic cylinders for symmetrically pressing corresponding side portions of a mold mounted on a base member from both sides to position the mold in a first direction; At least one pair of second hydraulic cylinders that symmetrically press the corresponding side portions of the mold facing the second direction orthogonal to the one direction from both sides, and position the mold in the second direction; A first multi-stage synchronization including a plurality of pressure boosting parts in which pressure working chambers individually connected to the cylinders are arranged in series with each other, and a common drive part for synchronously driving pistons of these pressure boosting parts. Type hydraulic pressure supply device, a plurality of pressure increasing parts in which pressurizing working chambers individually connected to the respective second hydraulic cylinders are arranged in series with each other, and pistons of these pressure increasing parts are synchronously driven. A second multi-stage synchronous hydraulic supply device comprising a common drive Mold positioning device according to claim.