JP2003094118A - Mold unit and pressing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive mold unit which is capable of partial recombination, and to provide a pressing machine using this mold unit. SOLUTION: The pressing machine is equipped with a mold unit provided with a male mold 31, a female mold 32 and a blank holder 33, and a pressing mechanism 34 which presses one side of the female mold 32 and blank holder 33 against the other side to nip a workpiece and presses one side of the male mold 31 and female mold 32 against the other side to draw the workpiece. Each of the male mold 31, female mold 32 and blank holder 33 is formed by combining a plurality of blocks into one piece which can be recombined. Slant joints 71 are formed between the blocks of the female mold 32 against the slip direction of a workpiece to be drawn, as a means to prevent the deterioration of the precision of the finished surface when splits between the blocks work on the workpiece.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reconfigurable mold device and a press machine using this mold device.

[0002]

2. Description of the Related Art As shown in FIG. 19, a hydraulic excavator 11 as a revolving type working machine has a revolving part on a lower traveling body 12.
An upper revolving structure 14 is rotatably provided via 13 and a front working machine 16 is provided on one side of the upper revolving structure 14 together with a cab 15.
A counterweight 17 is provided on the opposite side of the upper revolving structure 14 in order to maintain a mass balance with the revolving unit 13 as a fulcrum for the front working machine 16 and the like.

As shown in FIG. 20, the exterior plate of the counterweight 17 is formed by drawing using a mold attached to the press machine 21.

In this mold forming process, (a) the material 17a is supplied between the male mold (so-called punch) 22 and the blank holder 23 and the female mold (so-called die) 24, and (b).
The male die 22 and the blank holder 23 are lowered by a hydraulic cylinder (not shown) or the like to clamp the material 17a by the blank holder 23 and the female die 24, and then the male die 22 is lowered to start molding. , (C) the molded product 17b is completed by the male mold 22 and the female mold 24, and (d) the male mold 22 and the blank holder 23 are lifted to release the molded product 17b to form the molded product 17b. Are taken out.

When press-molding a counterweight exterior plate having different sizes and shapes, another press machine is used, or a mold device having a male mold 22, a blank holder 23 and a female mold 24 as a set is used. It is common to replace it with another mold device.

[0006]

In this case, the counterweight 17 has various sizes and shapes depending on the model of the hydraulic excavator 11, and the mold apparatus must be fully equipped to support it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive die device which can be partially recombined and a press machine using the die device. To do.

[0008]

According to a first aspect of the present invention, there is provided a male die formed in a convex shape, and a female die formed in a concave shape which is engaged with the male die to draw the material. A mold and a blank holder that fits around the male mold and faces the female mold to fix the circumference of the material during drawing, and the male mold, the female mold and the blank holder are It is a mold device that includes a plurality of blocks that are interchangeably divided and integrally combined, and the male mold, the female mold, and the blank holder are different from each other by changing only some blocks. Since the block is used as it is, it is an inexpensive mold that can be partially rearranged.

According to a second aspect of the present invention, in the mold apparatus according to the first aspect, there is provided a finish surface precision deterioration preventing means for preventing a decrease in finish surface accuracy when a divided portion between blocks acts on a material. This is a die device provided, and damages caused to the material by the divided portions between the blocks are reduced by the finish surface precision deterioration preventing means.

According to a third aspect of the present invention, in the mold apparatus according to the second aspect, the means for preventing deterioration of finishing surface accuracy is formed in an inclined shape between the blocks with respect to the sliding direction of the material to be drawn. It is a graded split seam, and even if the material being drawn is pressed against the graded split seam between blocks, the material slides in the direction that intersects the graded split seam between blocks, so the graded split seam between blocks is the material. Has little effect on the drawing surface, and the surface of the molded product is less likely to be scratched.

According to a fourth aspect of the present invention, in the die apparatus according to the second aspect, the means for preventing deterioration of the finishing surface accuracy is provided with a female die for the division seam between the blocks of the male die and the blank holder. It is an offset split seam that offsets the split seam between blocks, and by offsetting the split seam between the blocks on the male mold side and the split seam between the blocks on the female mold side by the offset split seam, The split seams have little effect on each other, and the surface of the molded product is less likely to be scratched.

According to a fifth aspect of the present invention, in the die apparatus according to any one of the first to fourth aspects, a female die and a blank holder are provided to prevent material generation and wrinkling during drawing. A mold apparatus provided with a step-like material restraining means provided on a material fixing surface for sandwiching a material, and restrained by a step-like material restraining means provided on a material fixing surface of a female die and a blank holder. Since the peripheral edge portion of the material does not slip excessively during drawing, wrinkles that occur in the material when slipping excessively is suppressed, and deterioration of the finished surface accuracy of the molded product due to wrinkles is prevented.

According to a sixth aspect of the present invention, in the die device according to the fifth aspect, the material is provided outside the material restraining means and is sandwiched between the female die and the blank holder. It is a mold device equipped with a shirring means for preliminarily cutting off the material-unused portion that remains in a protruding shape between the two, and the material-unused portion that remains in a protruding manner outside the material restraining means becomes resistance during drawing, Since it causes wrinkles that reduce the accuracy of the finished surface of the product, by cutting off this unnecessary part with a shirring means in advance, wrinkles from the periphery of the material during drawing are suppressed and the finished surface of the molded product is suppressed. Prevents deterioration of accuracy.

According to a seventh aspect of the present invention, in the mold apparatus according to any one of the first to fourth aspects, the finishing surface is prevented from being deteriorated when the divided portions between the blocks act on the material. An accuracy reduction preventing means, a material restraining means in which a female die and a blank holder sandwich the material in order to prevent the generation of a material presser and a wrinkle at the time of drawing, and a material restraining means, and a material restraining means. A mold device provided with a shearing means for cutting off a material unnecessary portion remaining in a protruding state between the female mold and the blank holder, which is provided on the outside of And
Prevents deterioration of the finished surface accuracy of the molded product due to scratches on the material at the divided parts between the blocks and wrinkles generated from the material unnecessary parts sandwiched by the female mold and blank holder, and improves the finished surface accuracy synergistically. Let

According to an eighth aspect of the present invention, in the die apparatus according to any one of the first to seventh aspects, a concave portion is located between the material fixing surface of the female die facing the blank holder and the concave inner surface. A die device having an arcuate cross-section formed on an opening edge and a material slip-in introduction surface formed by obliquely notching the inner surface side of the recess of the arcuate cross-section, the radius of the arc-shaped cross-section Even if it can not be sufficiently large, the material slip-in introduction surface formed in an inclined shape on the inner surface side of the concave portion of the arc-shaped cross-section, smooth sliding into the female mold of the material fixed by the blank holder, Relaxing strict draw conditions,
Reduces scratches on the squeezing surface of the material.

According to a ninth aspect of the present invention, in the die apparatus according to any one of the first to eighth aspects, a die is provided with block position deviation prevention means for preventing positional deviation between a plurality of blocks. The device is a device for preventing the positional displacement between the blocks by the block positional displacement prevention means and for preventing the scratches on the surface of the molded product due to the positional displacement between the blocks.

The invention described in claim 10 is claim 9
In the die device described above, the block position deviation prevention means is provided with a guide positioning protrusion that projects from one side and the other side of the blank holder in the longitudinal direction toward the female die side and that regulates the longitudinal positional deviation between the blocks of the female die. A mold device comprising a member and a guide positioning concave groove provided on the female mold side to be fitted with each of the guide positioning convex members, wherein the guide positioning convex member of the blank holder is female when drawing. Fits in the guide positioning groove of the mold to prevent misalignment between the blocks of the blank holder and the female mold, and both sides of the blank holder that receive a force in the direction of contraction due to fitting with the female mold The guide positioning convex member holds the blocks of the female die so as to hold them, so that the expansion between the blocks of the female die receives the force from the male die in the direction of the inter-block extension during drawing. Was suppressed by the positioning convex member, extended by suppressing the occurrence of gaps between the blocks, reduce the scratch stick to the surface of the molded article when the occurrence of the gap is conspicuous.

The invention described in claim 11 is claim 9
Alternatively, in the mold apparatus according to item 10, the block position deviation prevention means includes a fixed positioning convex member provided on a division surface of one of the blocks and a fixed positioning convex member provided on a division surface of the other block. A mold device having a fixed positioning recessed material to be fitted, wherein the fixed positioning convex member and the fixed positioning recessed material are fitted together to prevent misalignment between blocks joined to each other on a dividing surface, Prevents scratches on the surface of the molded product due to misalignment.

The invention described in claim 12 is the same as claim 9.
In the die device according to any one of 1 to 11, the block position deviation prevention means includes a common plate to which a plurality of blocks are fixed and a key groove provided on each of opposing surfaces of the blocks, and the key grooves. A mold device having a fitted positioning key, wherein a common plate and a plurality of blocks are integrated by the positioning key fitted in these key grooves, so that the blocks to be joined to each other Is prevented through a common plate, and the scratches on the surface of the molded product due to the displacement between the blocks are prevented.

The invention described in claim 13 is the same as claim 9.
In the die apparatus according to any one of claims 1 to 12, block position deviation preventing means are provided on an outer surface of the male die and an inner surface of the blank holder, and guide the vertical movement between the male die and the blank holder, and A male die / blank holder guide positioning means for positioning between the die / blank holder, and vertical movement between the female die / blank holder provided on the outer surface of the female die and the outer surface of the blank holder. A female mold that positions the female mold and the blank holder together.
A die apparatus comprising a blank holder guide positioning means, which guides and positions the vertical movement between the male die and the blank holder during drawing by means of the male die / blank holder guide positioning means. The vertical positioning between the female mold and blank holder is guided and positioned by the guide positioning means between the mold and the blank holder, so the vertical motion between the male mold block, blank holder mold and female mold block is smooth. In addition, it prevents the mold block of the male mold, the blank holder and the female mold from being displaced from each other when moving up and down, and scratches on the surface of the molded product due to the displacement of the mold blocks. Prevent the risk of sticking.

The invention described in claim 14 is the same as claim 1.
The mold apparatus according to any one of claims 1 to 13, wherein the mold apparatus includes a material positioning mechanism for positioning the material carried between the male mold and the blank holder and the female mold. The material positioning mechanism accurately positions the material, even if the position is not accurate.

The invention described in claim 15 is the same as claim 1.
In the mold apparatus according to any one of 1 to 14, a male mold,
The lower die of the blank holder and the female die is an air bearing that forms an air film between a common plate and a block located above the common plate to allow the block to move, and this air bearing. It is a mold device equipped with a block moving mechanism that moves a freely movable block in the block indirect separating direction.When the partial block of the mold located on the lower side is recombined, the air bearing is made to function, Adjacent blocks are made movable, and the block moving mechanism moves the adjacent blocks on the plate to easily separate or join the blocks.

The invention described in claim 16 is the same as claim 1.
The mold apparatus according to any one of claims 1 to 15, wherein the male mold is a lower mold and the female mold is an upper mold, and the lower mold is a male mold and the upper mold is a female mold. The molded product that has been drawn into a downward opening is taken out from between the male mold and the female mold in the same position and transferred to the trim processing position. Remove the part.

The invention described in claim 17 is the invention according to claim 1.
In the mold apparatus according to any one of 1 to 16, a male mold,
The female die and blank holder are die units that draw the outer plate used for counterweight of the swing type working machine, and the counterweight with high surface accuracy is provided by the molded product with few scratches during drawing. To manufacture.

The invention described in claim 18 is the invention according to claim 1.
A mold device comprising a male mold, a female mold, and a blank holder according to any one of 1 to 17, and one of the female mold and the blank holder is pressed against the other to clamp the material and the male mold and the female mold. The press machine is provided with a press body mechanism that presses one of the molds to the other to draw the material, and the press machine is also inexpensively configured by an inexpensive die device that can be partially recombined.

The invention described in claim 19 is the same as claim 1.
8. The press machine according to 8, wherein the mold apparatus is equipped with a mold transfer mechanism for loading the mold device into the press main body mechanism from the outside of the press main body mechanism and for unloading it from the inside of the press main body mechanism to the outside. With this, the die device is automatically loaded into and unloaded from the press body mechanism to reduce the burden on the operator.

The invention described in claim 20 is the same as claim 1.
The press machine according to 8 or 19, wherein the material is carried in between the male mold and the blank holder and the female mold, and the molded product after drawing is carried out from between these, the press machine comprising: Since the material is automatically carried in and out between the male mold and the blank holder and the female mold by the robot, the work efficiency is improved and the burden on the worker is reduced.

The invention described in claim 21 is the same as claim 1.
21. In the press machine according to any one of 8 to 20, a die transfer mechanism for loading the die device into the press body mechanism from the outside of the press body mechanism and unloading the die device from the press body mechanism to the outside, and a male body for the press body mechanism. The mold clamping mechanism that fixes and releases the mold and female mold, and the material is carried between the male mold and the blank holder and the female mold, and the molded product after drawing is It is a press machine equipped with a robot that can be carried out from between
The die transfer mechanism automates the loading and unloading of the die device to and from the press body mechanism, the die clamping mechanism automates the loading and unloading of the die device from the press body mechanism, and the robot automates the loading and unloading of materials. Provide an automatic press machine.

The invention described in claim 22 is the same as claim 2.
In the press machine described in 0 or 21, the robot is
A plurality of material adsorbing means arranged in a relatively upper stage for adsorbing and supporting a flat material, and a deformable suspension means arranged in a relatively lower stage for adsorbing and supporting a molded product after drawing. A press machine equipped with a robot hand having a plurality of molded product suction means, in which a robot hand of one robot carries in the material by means of the material suction means arranged in a relatively upper stage, and is deformably suspended. By means of the molded product suction means arranged in a relatively lower stage by the means, the uneven shaped molded product after drawing is carried out, so that one robot can be efficiently used.

The invention described in claim 23 is the same as claim 1.
23. In the press machine according to any one of 8 to 22, the press main body mechanism includes struts located on one side and the other side in the longitudinal direction of the die device, and a die up-and-down moving member that is moved up and down along these struts. , Racks provided on each support,
A press machine including a pinion that is integrally fitted to one end and the other end of a shaft that is rotatably provided on a mold up-and-down moving member and that meshes with a rack of each support column. The rack, the shaft, and the pinion Thus, an equalizer device, that is, a balancing device, which evenly distributes the eccentric load, is configured so that the mold up-and-down moving member can always move vertically while maintaining a horizontal state even when the eccentric load acts.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to various embodiments shown in FIGS.

FIGS. 1 and 2 show an example of a hydraulic single-action deep-drawing press machine for press-forming a flat plate material into an asymmetrical deep-drawing cross section, which can be divided and recombined into a plurality of molds. With one die device 30, it is possible to press-form long / medium / short / long members in a single process that does not require any manpower and by so-called push-cutting work.
This is a press machine that automates loading and unloading of the die device 30 and the material 17a.

The metal mold device 30 has a male metal mold (so-called punch) 31 formed in a convex shape as a lower metal mold, and is fitted with the male metal mold 31 to draw a material and form a concave metal mold. A die (so-called die) 32 is used as an upper die, and a blank holder (so-called wrinkle retainer) 33 that fits around the male die 31 and faces the female die 32 and fixes the periphery of the material during drawing processing Deploy.

This press machine presses the die device 30 and one of its female die 32 and blank holder 33 against the other to pinch the material, and one of the male die 31 and the female die 32 to the other. Press body mechanism 34 for pressing and drawing material
It has and.

As shown in FIG. 1, in the press main body mechanism 34 of this press machine, a gate type frame 37 is fixed between the upper portions of a plurality of columns 36 standing on the lower body frame 35 of the main body, and the gate type frame 37 is fixed to this gate. A plurality of hydraulic cylinders 38 (three in the drawing) arranged at equal intervals along the paper surface of FIG. 1 are attached to the mold frame 37, and the piston rods 38a of these hydraulic cylinders 38 are expanded and contracted. An intermediate frame 39 as a mold up-and-down moving member slidably fitted to the column 36 is vertically moved along the column 36.

A lifting cylinder (not shown) fixed to the lower frame 35 of the main body is provided between the columns 36, and a piston rod (not shown) of this lifting cylinder is connected to the intermediate frame 39 to increase the mass. It assists the driving of the intermediate frame 39.

A blank holder lifting mechanism 40 for lifting the blank holder 33 is provided inside the lower frame 35 of the main body.

The blank holder lifting mechanism 40 is provided with a recess 41 at the center of the lower frame 35 of the main body.
A plurality of (three in the drawing) die cushion cylinders 42, which are arranged at equal intervals along the paper surface of FIG. 1, are vertically fixed inside the plurality of die cushion cylinders 42.
Die cushion frame 4 at the end of piston rod 42a
3 is stuck. Multiple die cushion cylinder 42
Are expanded and contracted synchronously.

On the lower surface side of the die cushion frame 43,
As shown in FIG. 2, a plurality of die cushion guide rods 44 are integrally provided, and guide holes of the lower frame 35 of the main body are provided.
It is fitted to 45 so that it can move up and down. Further, on the upper surface side of the die cushion frame 43, a plurality of push rods 46 for holding the blank holder are provided.

As shown in FIG. 2, the lower frame of the main body
A recess 47 for installing a power source is provided on one side of 35, and a hydraulic source device 48 such as a prime mover, a hydraulic pump, and a hydraulic tank is installed in the recess 47. The hydraulic oil is supplied from the hydraulic power source device 48 to the hydraulic cylinder 38, the die cushion cylinder 42, and the like.

As shown in FIG. 1, the intermediate frame 39 is provided with a balancing device or equalizer device 50 for evenly distributing the eccentric load of the intermediate frame 39.

The equalizer device 50 is provided with a rack 51 on each of the columns 36 located on one side and the other side in the longitudinal direction of the mold device 30.
Are integrally provided, and the pinion 53 is integrally fitted to one end and the other end of the shaft 52 that is rotatably provided by horizontally penetrating the intermediate frame 39.
These pinions 53 and the racks 51 of the columns 36 are in mesh with each other.

Then, on the left and right racks 51 fixed to the right and left columns 36, the left and right pinions 53 integrated through a shaft 52 rotatably inserted in the intermediate frame 39 are in mesh with each other. Intermediate frame 39 by moving
Even if an asymmetric eccentric load is applied to the intermediate frame 39, the intermediate frame 39 can move up and down while always maintaining a horizontal state.

Further, as shown in FIG. 2, this press machine carries the mold apparatus 30 into the press body mechanism 34 from the outside on the right side of the press body mechanism 34 and presses the press body mechanism.
A mold transfer chain conveyor 54 is provided as a mold transfer mechanism that carries out from inside 34 to the outside on the right side.

The mold conveying chain conveyor 54 is provided with a pair of chain mounting grooves 55 on both sides of the press main body mechanism 34 from the outside to the inside through a recess 41 as shown in FIG. Inside the chain mounting groove 55, as shown in FIG. 2, an endless transport chain 56 has sprockets on both ends.
These chains are wound around 57 and arranged in parallel.
A die surface plate 58 is attached on the die surface 56, and one set of a male die 31, a female die 32 and a blank holder 33 can be mounted on the die surface plate 58.

The sprocket 57 at one end of the transport chain 56 is
It is driven by a hydraulic motor 59 that is electrically controlled via a solenoid valve or the like in the hydraulic circuit.

The press main body mechanism 34 includes a male die 31,
A mold clamping mechanism 60 that fixes the female mold 32 and the blank holder 33 and can release the fixation is provided. With this mold clamping mechanism 60, the male mold 31 and the female mold 32 are provided.
Is detachably attached.

The mold clamping mechanism 60 includes a plurality of mold clamping cylinders (not shown) mounted on the mold surface plate 58.
The male mold 31 is clamped by the, and the female mold 32 is clamped by a plurality of mold clamp cylinders (not shown) mounted on the intermediate frame 39.

Plate 31d of mold surface plate 58 and male mold 31
The push rod insertion holes 61 and 62 for inserting the push rods 46 of the blank holder lifting mechanism 40 are provided in each.

Next, a die unit for the press body mechanism 34.
The method of mounting the 30 will be described.

To mount the die unit 30 on the press body mechanism 34, the male die 31 and the female die are placed on the die surface plate 58 on the die transfer chain conveyor 54 extending outside the press body mechanism 34. Crane (not shown) with one set of 32 and blank holder 33
After that, the solenoid valve in the hydraulic circuit for driving the hydraulic motor is controlled by an electric signal to operate the hydraulic motor 59, and the transfer chain 56 of the mold transfer chain conveyor 54 is driven to rotate, and the mold apparatus is operated. The 30 is carried into the press body mechanism 34 and positioned.

Then, in order to assemble the female die 32 to the press main body mechanism 34, an electric signal for controlling an electromagnetic valve in a hydraulic circuit for driving the hydraulic cylinder 38 located on the upper side of the press main body mechanism 34 is switched by a switch. When switched to the descending side, pressure oil is sent to the head side of the hydraulic cylinder 38, and the intermediate frame 39 starts descending.

At this time, the equalizer device 50 functions, and on each rack 51 fixed to the columns 36 on both sides, the pinions 53 on both sides connected by the shaft 52 through which the intermediate frame 39 is inserted are driven to drive the intermediate frame. 39 starts descending while always keeping horizontal, and stops when descending on the plate 32d of the female die 32.

After that, the operating levers of a plurality of mold clamp cylinders (not shown) provided on the intermediate frame 39 are switched to move the plate 32d of the female mold 32 to the intermediate frame 39.
When the female die 32 is attached to the intermediate frame 39, the attachment of the female die 32 to the intermediate frame 39 is completed.

On the other hand, the assembly of the plate 31d of the male die 31 having the male die 31 and the blank holder 33 and the die surface plate 58 is carried out by mounting a plurality of die clamp cylinders on the die surface plate 58. Male mold 31 by switching the operating lever (not shown)
By fixing the plate 31d of 3 to the die surface plate 58, the male die 3
The positioning of 1 and the blank holder 33 is completed.

Further, when raising the female die 32, when the solenoid valve in the hydraulic circuit for operating the upper hydraulic cylinder 38 is switched to the rising side by an electric signal switching operation by a switch,
Pressure oil is sent to the piston rod side of the hydraulic cylinder 38, the piston rod 38a contracts, and the head of a lifting cylinder (not shown) mounted facing the female die 32 between the columns 36. Pressure oil is sent to the side, and the piston rod of the lifting cylinder extends. At the same time, the equalizer device 50 rack
The pinion 53 is driven on 51, and the intermediate frame 39 and the female die 32 rise while maintaining the horizontal state.

As described above, the die transfer chain conveyor 54 automates the loading / unloading of the die apparatus 30 to / from the press body mechanism 34, and the die clamping mechanism 60 automates the attachment / detachment of the die apparatus 30 to / from the press body mechanism 34. This reduces the burden on the operator.

Next, as shown in FIG. 2 and FIG.
This press machine uses the material on the left side of the press body mechanism 34.
Material handling robot as a 6-axis vertical articulated robot that carries 17a between male mold 31 and blank holder 33 and female mold 32 and carries out molded product 17b after drawing (between these). Hereinafter, this robot is referred to as a "material handling robot") 63.

The material handling robot 63 has a robot arm 65 mounted on a robot arm 64 which can be horizontally swiveled, can be turned in the front-back direction, and can be turned in the up-and-down direction. The suction means 66 such as a plurality of vacuum pads arranged in two stages is vertically supported.

The plurality of suction means arranged in the relatively upper stage is a material suction means 66a for horizontally suctioning and supporting the material 17a in a flat plate state, and the plurality of suction means arranged in the lower stage is deformed. Free hanging means such as chains 66b
Is a molded product suction means 66c for supporting by suction the molded product 17b that has been stretched for longer and has been drawn.

The material attracting means 66a and the molded article attracting means 66c are vacuum pads for attracting and holding a material or a molded article by vacuum pressure, or magnets for attracting and holding a material or a molded article by electromagnetic force.

Then, the material handling robot 63 adsorbs the material 17a by the material adsorbing means 66a arranged in a relatively upper stage, and automatically attaches the material 17a between the male die 31 and the blank holder 33 and the female die 32. While being carried in, the deformable suspension means 66b is provided with the molded product suction means 66c arranged relatively in the lower stage.
Thus, the concavo-convex shaped product 17b after drawing is adsorbed and carried out. This allows one robot to be used efficiently,
The burden on the operator is reduced.

As described above, the die transfer chain conveyor 54 automates the loading / unloading of the die apparatus 30 to / from the press body mechanism 34, and the die clamping mechanism 60 automates the attachment / detachment of the die apparatus 30 to / from the press body mechanism 34. , Material handling robot
A fully automatic press machine is provided by automating loading / unloading of the material 17a by 63.

Next, as shown in FIG. 5 and FIG.
Male die 31, female die 32 and blank holder of the die unit 30
Each of the blocks 33 includes a plurality of blocks, each of which is formed so as to be recombinable and is integrally combined.

That is, as shown in FIG. 6, a male mold
Reference numeral 31 denotes a block 31a on one side, a block 31b on the other side, and a central block (insert block) 31c located between these blocks 31a, 31b, which can be combined in a recombinable manner and a common plate 31d. It is fixed to.

Similarly, the female die 32 has a block 32a on one side.
And the block 32b on the other side and these blocks 32a, 32b
A central block (insert block or insert die) 32c located between them is removably coupled and fixed to a common plate 32d.

Similarly, the blank holder 33 includes a block 33a on one side, a block 33b on the other side, and these blocks 33a.
Central blocks (insert blocks) 33c1 and 33c2 located between a and 33b are recombinably coupled and fixed to a common plate 33d.

As described above, in each of the male die 31, the female die 32 and the blank holder 33, only the central blocks 31c, 32c, 33c1 and 33c2 are rearranged so that the blocks 31a on one side, 32a, 33a and blocks 31b, 32 on the other side
b, 33b can be used for products of different sizes as they are.

Since only some blocks are recombined and the other blocks are used as they are, the die is an inexpensive metal mold that can be partially recombined, and the press machine is also inexpensive.

Next, as shown in FIG. 5 and FIG.
The die unit 30 is provided between the blocks 32a and 32c of the female die 32 and between the blocks 32b and 32c as a means for preventing the finish surface precision from being lowered when the divided portions between the blocks act on the material. Between the blocks 32a and 32c and between the blocks 32b and 32c, there is a scratch provided on the material 17a by an inclined split seam 71 that is formed in a slanting direction with respect to the sliding direction of the material 17a to be drawn. Is devised so as to be reduced by the inclined split seam 71 as a means for preventing the deterioration of the finished surface accuracy.

In order to form this inclined division seam 71, as shown in FIG. 7, a V-shaped cross-section is formed on the surface of the female die 32 which is joined to the blocks 32a and 32b on the left and right sides at the central block 32c. An inclined division surface 71a is formed, while the block 3 on one side is formed.
An inclined division surface 71b having an inclined cross section corresponding to the V-shaped cross section of the central block 32c is formed on the surface of the block 2b and the block 32b on the other side that is joined to the central block 32c.

Then, the three blocks 32a, 3 of the female die 32
The two inclined division seams 71 formed between 2b and 32c appear in an inclined shape with respect to the sliding direction (that is, the vertical direction) of the material 17a to be drawn, and in other words, the material 17a being drawn. Slides in the direction intersecting the inclined split seam 71 between the blocks 32a, 32b, 32c, so that the female die being drawn
Even if a gap is generated in the inclined split seam 71 between the blocks 32a, 32b, 32c due to the inter-block expansion force that 32 receives from the male die 31, the influence of these inclined split seams 71 on the drawing surface of the material 17a is small. , The surface of the molded product 17b is less likely to be scratched.

Next, as shown in FIGS. 5 to 8, the mold apparatus 30 is equipped with various block position deviation prevention means for preventing the position deviation between a plurality of blocks.
These block position shift prevention means prevent the position shift between blocks, and the position shift between blocks prevents the molded product from moving.
Prevents scratches on the surface of 17b.

First, FIGS. 5 and 6 show a first block position deviation preventing means 72. This block position deviation preventing means 72 is provided with a guide positioning convex member 73 for guiding and positioning a convex shape from one side and the other side in the longitudinal direction of the blank holder 33 toward the female mold 32 side. The block 32 on one side and the other side of the female die 32 facing the
a and 32b are guide means and positioning means provided with concave guide positioning concave grooves 74 to be fitted with these guide positioning convex members 73, respectively, and between the blocks 32a, 32b, 32c of the female die 32. It is a longitudinal direction positional deviation restricting means at the time of drawing for restricting the positional deviation in the longitudinal direction.

Then, at the time of drawing, the blank holder 33
The guide positioning convex member 73 is fitted into the guide positioning concave groove 74 of the female die 32 to prevent the positional displacement between the blocks of the blank holder 33 and the female die 32, and The guide positioning convex members 73 on both sides of the blank holder 33, which receives a force in the interval contraction direction by fitting, are provided on the blocks 32 of the female mold 32.
Since the a, 32b, and 32c are held so as to be held, even in the female die 32 that receives a force in the inter-block extension direction from the male die 31 during drawing, the extension between the blocks 32a, 32b, 32c is suppressed, and Generation of a gap between the blocks 32a, 32b, 32c is suppressed, and scratches on the surface of the molded product are prevented when the formation of the gap is remarkable.

A guide positioning pin (not shown) is provided so as to project from the female die 32 side, and a guide positioning hole (not shown) to be fitted with this guide positioning pin is bored on the blank holder 33 side. , The block position deviation prevention means 72
You may make it give a function similar to.

Next, FIGS. 6, 7 and 8 show a second block position deviation preventing means 75. The block position deviation prevention means 75 is fitted with a plurality of fixed positioning convex members 76 provided on the divided surface of one block and a fixed positioning convex member 76 provided on the divided surface of the other block, which are joined to each other. Fixed positioning recessed material at multiple locations
77, the fixed positioning convex member 76 and the fixed positioning concave member 77 at a plurality of positions are fitted to each other to prevent the positional displacement between the blocks to be joined to each other, and the positional displacement between the blocks prevents the molded product from being displaced. Prevents scratches on the surface of.

That is, in the case of the female die 32, FIG.
As shown in (b) and FIG. 8, the central block 32
A convex taper type fixed positioning convex member 76 is fitted on the left side surface of c and is fixed by a bolt 78, and a concave taper type fixed positioning concave portion is formed on the opposite surface of one block 32a joined to the central block 32c. The member 77 is fitted and fixed by the bolt 79, and the fixed positioning convex member 76 and the fixed positioning concave member 77 are fitted to each other as shown in FIG.
By being performed at a certain position, the positional shift between the central block 32c and the block 32a on one side is prevented.

Similarly, as shown in FIGS. 7A and 7B and FIG. 8, a concave taper type fixed positioning concave member 77 is fitted on the right side surface of the central block 32c and fixed by a bolt 79. At the same time, a convex taper-shaped fixed positioning convex member 76 is fitted on the facing surface of the block 32b on the other side to be joined to the central block 32c and fixed by a bolt 78, and these fixed positioning concave member 77 and fixed positioning convex member As shown in FIG. 6, the fitting with 76 is performed at two places on the left and right, so that the central block 32c and the block 32b on the other side are prevented from being displaced, and the three blocks 32a, 32b, 32c are separated. It is accurately positioned.

Then, as shown in FIGS. 3, 4 and 8, a plurality of connecting bolts 81 inserted into the blocks 32a, 32b, 32c of the female die 32 and the connecting bolts 81 are screwed. By the combined nut 82, the central block 32c and the block 32a on one side and the block 32b on the other side are fastened and integrally coupled.

This fastening structure is, as shown in FIG.
From the recessed portion 83 provided in the block 32a on one side, through the central block 32c, to the threaded end portion of each connecting bolt 81 projected in the recessed portion 84 provided in the block 32b on the other side, respectively, nuts. Screw 82 together and tighten.

Block position deviation prevention means 75 of the male die 31
As shown in FIG. 3, FIG. 4 and FIG. 6, the block 31a on one side and the block 31b on the other side are fixed to the central block 31c, and the fixed positioning convex member similar to the female die 32 and the fixed positioning. Accurate positioning by fitting with the recess material,
They are connected by a connecting bolt 81 and a nut 82.

As shown in FIGS. 3, 4 and 6, the block position deviation preventing means 75 of the blank holder 33 has one block 33a on the one side and a block 33b on the other side with respect to the central blocks 33c1 and 33c2. The fixed positioning convex member and the fixed positioning concave member similar to those of the female die 32 are accurately positioned by the fitting, and are connected by the connecting bolt 81 and the nut 82.

7 (a) and 7 (b) are examples in which the blocks 32a, 32b, 32c of the female die 32 are each formed of a single member, but FIG. 7 (c) shows one block 32a. And the block 32b on the other side, the block main body 32a1, 3 without the inclined surface
This is an example in which the inclined plate 32a2, 32b2 is formed by a composite member of 2b1 and the inclined plates 32a2, 32b2 in which the inclined dividing surface 71b is formed by another member.
It is integrated with 32a1 and 32b1.

FIG. 7D shows that the block 32a on one side and the block 32b on the other side as well as the central block 32c have a block main body 32c1 having no inclined surface and inclined divided surfaces on both sides.
This is an example in which the portion 71a is formed of a composite member with the inclined plate 32c2 formed by another member, and the inclined plate 32c2 is integrated with the block body 32c1 by the bolt 86.

Such block bodies 32a1, 32b1, 32c1
The block in which the inclined plates 32a2, 32b2, 32c2 are integrated with each other has an advantage that the angle or the interval of the inclined division seam 71 can be easily partially adjusted.

Next, FIGS. 4, 5 and 6 show a third block position deviation preventing means 87. This block position deviation preventing means 87 is provided in the male die 31, the female die 32, and the blank holder 33 in such a manner that a plurality of blocks 31a, 31b, 31
c, 32a, 32b, 32c, 33a, 33b, 33c1, 33c2, and common plates 31d, 32d, 33d, and blocks 31a, 31b, 31c,
A plate-side key groove 88 and a block-side key groove 89 are provided on the surface facing the 32a, 32b, 32c, 33a, 33b, 33c1, 33c2, and the positioning key 90 is fitted into these key grooves 88, 89. The male mold 31, the female mold 32, and the plates 31d, 32d, 33d of the blank holder 33 and the blocks 31a, 31b, 31c, 32 of the blank mold 33 are mounted.
The a, 32b, 32c, 33a, 33b, 33c1, and 33c2 are securely positioned.

That is, as shown in FIG. 5, the male die 31
The block 31a on one side, the block 31b on the other side, and the block 31c in the center are accurately positioned with respect to the plate 31d of FIG. 3 by the respective positioning keys 90, and are fixed by the bolts 91 as shown in FIG. There is.

Similarly, as shown in FIG. 5, with respect to the plate 32d of the female die 32, the block 32a on one side, the block 32b on the other side and the block 32c on the center side are respectively positioning keys.
Positioned by 90 and secured by bolts 92, respectively, as shown in FIGS.

Similarly, as shown in FIG. 5, the block 33a on one side, the block 33b on the other side, and the blocks 33c1 and 33c2 in the center are positioned by the positioning keys 90 with respect to the plate 33d of the blank holder 33, respectively. As shown in FIG. 3, they are fixed by bolts 93.

Here, as shown in FIGS. 5 and 6, the central blocks 31c, 32c, 33c1, 33c2 of the male die 31, the female die 32 and the blank holder 33 are positioned by a single key groove. Positioning is performed by the positioning key 90 fitted to the block, but the blocks 31a, 31b, 32a, 32b, 33 on one side and the other side are positioned.
For positioning a / 33b, a plurality of key grooves 88 and 89 are arranged at different pitches on the surface where each plate 31d, 32d, 33d and each block 31a / 31b, 32a / 32b, 33a / 33b are joined to each other. Therefore, the positioning key 90 is inserted into the matching key groove 88, 89 from among these key grooves 88, 89.

The respective pitches of these key grooves 88, 89 correspond to one of the plate-side key grooves 88 and the block-side key groove 89 corresponding to a plurality of central blocks 32c of different sizes prepared in advance. Set so that either matches.

Further, as shown in FIG. 6, the fixing by the bolts 91, 92, 93 is carried out by inserting a large number of bolts into the respective plates 31d, 32d, 33d of the male die 31, the female die 32 and the blank holder 33. The holes 94 are respectively formed, and the blocks 31a, 31b, 31c, 32a, 32b, 32c, 33a, 33b, 33c1, 33c2 have a larger number of bolt insertion holes 96 than the recesses 95 provided on the side surfaces.
Each of these blocks 31
Concave 95 of a ・ 31b ・ 31c, 32a ・ 32b ・ 32c, 33a ・ 33b ・ 33c1 ・ 33c2
The blocks 91a, 31b, 31c, 32a, and 32b are screwed into the bolt screw holes 94 of the plates 31d, 32d, and 33d by inserting the bolts 91, 92, and 93 inserted into the bolt insertion holes 96, respectively.
・ Fix 32c, 33a, 33b, 33c1, 33c2 to each plate 31d, 32d, 33d.

In this way, the common plates 31d, 32d, 33
d and multiple blocks 31a, 31b, 31c, 32a, 32b, 32c, 33a, 33b
-33c1 and 33c2 and bolts are accurately positioned by the positioning key 90 fitted in these key grooves 88 and 89.
Since they are integrated by 91, 92, 93, the plates 31d, which have the same positional displacement between the blocks 31a, 31b, 31c, the blocks 32a, 32b, 32c, and the blocks 33a, 33b, 33c1, 33c2 that are joined to each other. This is prevented via 32d and 33d, and the scratches on the surface of the molded product 17b due to the positional displacement between the blocks joined to each other are prevented.

Next, as shown in FIG. 3 and FIG.
A fourth block position for guiding the vertical movement between the male die 31 and the blank holder 33 and positioning the male die 31 and the blank holder 33 on the outer surface of the male die 31 and the inner surface of the blank holder 33. A male die / blank holder guide positioning means 111 is provided as a deviation preventing means.

This male die / blank holder guide / positioning means 111 comprises blocks 31 on one side and the other side of the male die 31.
A plurality of convex guide guide slide bases 112 are provided on the left and right outer surfaces of a and 31b, respectively. The guide guide slide base 112 and the concave guide guides 113, which are fitted vertically slidably, are provided respectively, and are configured to firmly maintain the guide and positioning between the male die 31 and the blank holder 33. .

Similarly, as shown in FIGS. 3 and 6, the outer surface of the female die 32 and the outer surface of the blank holder 33 are guided to move vertically between the female die 32 and the blank holder 33. A female die / blank holder guide positioning means 114 is provided as a fifth block position deviation preventing means for positioning between the female die 32 and the blank holder 33.

In this female die / blank holder guide positioning means 114, a plurality of convex guide guide slide bases 115 are provided on the left and right outer surfaces of the blocks 33a and 33b on one side and the other side of the blank holder 33, respectively. The projections having concave grooves inside which are fitted slidably in the vertical direction with the respective guide guide slide bases 115 from the left and right outer surfaces of the blocks 32a, 32b on one side and the other side of the female die 32 facing these. guide
116 are respectively provided so as to project downward, and are configured to firmly maintain the guide and positioning between the female die 32 and the blank holder 33.

During drawing, the blocks 31a and 33a of the male mold 31 and the blank holder 33 are fitted by fitting the guide guide slide base 112 of the male mold / blank holder guide positioning means 111 and the guide guide 113. Between and block 31
The vertical movement between b and 33b is guided and positioned, and by fitting the guide guide slide base 115 of the female mold / blank holder guide positioning means 114 and the projection guide 116, the female mold 32 / blank Block 32a / 3 of holder 33
It guides the vertical movement between 3a and between blocks 32b and 33b and positions them.

As a result, the male die 31 and the blank holder 33 are
The vertical movement between the respective die blocks of (3) and between the female die 32 and the respective blank blocks of the blank holder 33 is smoothly performed, and the male die 31 and the blank holder 33 during the vertical movement thereof.
The positional deviation between the mold blocks and between the female mold 32 and the blank holder 33 is reliably prevented, and scratches on the surface of the molded product due to the positional deviation between the mold blocks. To be prevented.

Next, FIGS. 3, 4 and 6 show a male mold.
31 and the blank holder 33, and the material positioning mechanism 121 for positioning the material 17a carried in between the female die 32.
It is shown.

The material positioning mechanism 121 has an L-shaped material clamp claw 122 on the material carrying-in side and the opposite side of the blocks 33a and 33b on one side and the other side of the blank holder 33.
Is rotatably supported in the material loading / unloading direction by a pin 123 inserted into the L-shaped corner portion while protruding from the upper surfaces of these blocks 33a, 33b.
On the side surface of and the L-shaped lower end of the material clamp claw 122.
The base end of the air cylinder 124 and the tip of its piston rod are rotatably connected by pins 125 and 126, respectively.

Further, as shown in FIG. 6, the material positioning mechanism 121 has a material positioning mechanism fixed on one end and the other end in the longitudinal direction of the blocks 33a and 33b on one side and the other side of the blank holder 33. Including the nail body 127.

When the material is loaded and unloaded, the air cylinder 124 is contracted to open the tip of the material clamp claw 122 outward, and when positioning the material,
By extending the air cylinder 124, the tip of the material clamp claw 122 is closed inward, and the material clamp claw 122 and the material positioning claw 127 carry the material handling robot 63 onto the blank holder 33. The positioned material 17a is accurately positioned.

Next, in FIGS. 9, 10 and 11, in the male die 31 and the blank holder 33 as the die located on the lower side, the plates 31d and 33d and the block 31a located on the upper side thereof are arranged. Air bearings 131 and 132 in which blocks 31a, 31b, 33a and 33b are movable by forming an air film between 31b, 33a and 33b, and blocks 31a and 31b which are movable by these air bearings 131 and 132 , 33a, 33b are shown as block moving mechanisms 133, 134 for moving in the block indirect separation direction.

As shown in FIGS. 6 and 9, the air bearing 131 of the male die 31 has square frame-shaped concave grooves 135 formed at two positions on the upper surface of the plate 31d. A seal member 136 such as an O-ring is fitted to the 135, respectively, and on the other hand, within a range narrower than each region surrounded by each seal member 136, the blocks 31a and 31b of the blocks 31a and 31b, which are in close contact with the plate 31d of the male mold 31, are closely attached. Air pool recesses 137 are respectively formed on the lower surface, and for each of these air pool recesses 137,
As shown in FIG. 9, a hose connecting pipe 138 for connecting an air supply hose is provided from a recess 95 provided on the side surface of each block 31a, 31b.
The hose connection pipe 13
Air supply hose 139 is connected to 8.

The air bearing 13 of this male die 31
1 is each block 31a, 3 for the plate 31d of the male die 31
When the positioning and fixing of the 1b and 31c are released and the connection between the blocks 31a, 31b and 31c is released, the air supply hose 139 is connected to the hose connecting pipe 138 to provide a pneumatic source such as a compressor. By supplying compressed air from the air reservoir recess 137 to the air reservoir recess 137, the air accumulated in the air reservoir recess 137 uniformly penetrates between the plate 31d of the male die 31 and the lower surfaces of the blocks 31a and 31b to be thin. Since the air film is formed, the blocks 31a and 31b can be horizontally moved with a slight force.

As shown in FIG. 11, the blank holder
33 plate 33d and each block 33a on one side and the other side,
Similarly to the air bearing 131 of the male mold 31, the air bearing 132 of the blank holder 33 provided between the seal member 141, the air reservoir recess 142, and the hose connecting pipe 143 is provided between the blank holder 33 and the blank holder 33.
Is equipped with.

FIGS. 10 (a) and 11 show a male die 31 for horizontally moving blocks 31a and 31b on one side and the other side of the male die 31 in relation to the air bearing 131 of the male die 31. Showing a block moving mechanism 133 of the above, and a male screw 145 rotatably supported inside the blocks 31a and 31b through a bearing 144,
A female screw 148 provided on the plate 31d of the male die 31 via a mounting member 147 is screwed into the hollow portion 146 of each block 31a, 31b.

When the central block 31c of the male die 31 is recombined with another size, the blocks 31a and 31b on one side and the other side are moved away from the central block 31c, or the central block 31c. Need to be close to
By fitting the handle 151 shown in FIG. 11 to the handle mounting boss 149 provided on the outer end of the male screw 145 and rotating the male screw 145, the female screw 148 provided on the stationary plate 31d side can be rotated. The male screw 145 is moved in the axial direction, and the blocks 31a and 31b on one side and the other side, which are movable by the air bearing 131 together with the male screw 145, are moved in the contact and separation directions with respect to the central block 31c.

10 (b) and FIG. 11, in relation to the air bearing 132 of the blank holder 33, the block movement for the blank holder 33 for horizontally moving the blocks 33a and 33b on one side and the other side of the blank holder 33 is performed. Shows mechanism 134,
A male screw 154 rotatably supported on the end surface of the plate 33d of the blank holder 33 via a mounting plate 152 and a bearing 153,
Female screws 156 fixed in the end surface recesses 155 of the blocks 33a and 33b are screwed together.

When the central blocks 33c1 and 33c2 of the blank holder 33 are replaced with those of other sizes, the blocks 33a and 33b on one side and the other side are replaced by the central block 33c.
Separated from 1, 33c2, or the central blocks 33c1, 33c2
Since it is necessary to fit the handle 151 to the handle mounting boss 157 provided at the outer end of the male screw 154,
By rotating the male screw 154, the immobile plate 3
The female screw 156 is moved with respect to the male screw 154 provided on the 3d side, and the one or other blocks 33a and 33b which are movable by the air bearing 132 together with the female screw 156 are brought into contact with and separated from the central blocks 33c1 and 33c2. Move to.

In this way, the male die 31 and the blank holder 33 located on the outer circumference of the male die 31 are divided into a plurality of blocks 31a, 31b, 31c, 33a, 33b, 33c1, 33c2, respectively.
Blocks 31a, 31b, 33a, 33b on one side and the other side, which are recombinably combined with blocks 31c, 33c1, 33c2 in the center of them
Since the air bearings 131 and 132 are mounted on the lower surface of the and the block moving mechanisms 133 and 134 are mounted on the end surfaces, respectively, when rearranging the central blocks 31c, 33c1 and 33c2, the male mold is supplied by air supply. Each of the air bearings 131 and 132 of the 31 and the blank holder 33 is made to function, and the blocks 31c, 33c1, 33c2 in the center and the blocks 31a, 31b, 33a, 33b on the one side and the other side adjacent to each other are made movable, and By rotating the male screws 145, 154 of the block moving mechanisms 133, 134, each block 31a of the male die 31 and the blank holder 33,
By horizontally moving 31b, 33a, and 33b on the respective plates 31d and 33d, it is possible to easily separate or join the blocks.

Next, as shown in FIG. 12A, in the female die 32, a material holding member 32e is integrated by a bolt 161 at a portion facing the blank holder 33. For the material holding member 32e, for example, alloy steel WR1000 may be used.

As shown in FIGS. 12 (a) and 12 (b),
The material clamping member 32e of the female mold 32 and the blank holder 33 face each other in the peripheral green part of the male mold 31 and clamp the material 17a on both material fixing surfaces, which imparts appropriate frictional resistance to the sliding of the material 17a. Step-like restraining beads 162, 163 are provided as a material restraining means. These restraining beads 162, 163 are shown in FIG.
As shown in FIG. 3, it is provided over the entire circumference of the female die 32 and the blank holder 33.

The material of the material holding member 32e and the restraining beads 162, 163 provide an appropriate material holding effect during drawing, and can prevent wrinkles from being generated due to excessive slippage of the material during drawing. .

That is, the female die 32 and the blank holder
Stepped restraining beads 162, 1 provided on the material fixing surface of 33
Since the peripheral edge of the material 17a constrained by 63 does not slip excessively during drawing, wrinkles generated in the material 17a when slipping excessively is suppressed, and the finished surface accuracy of the molded product 12b is reduced due to wrinkles. To be prevented.

Further, as shown in FIGS. 12A and 12C, it is located between the material fixing surface 164 of the material holding member 32e of the female die 32 and the inner surface 165 of the recess facing the blank holder 33. An arcuate cross section 166 having a radius R is formed at the opening edge of the recess. The material slip-in introduction surface portion 16 is formed by notching the arc-shaped cross-section portion 166 on the inner surface 165 side of the concave portion at an angle θ.
7 are formed.

The angle θ of the material sliding introduction surface portion 167 is 5
It is preferably provided within the range of 15 °. Further, the material slip-in introduction surface portion 167 may have a linear inclined cross section, but it is preferable to form it in an arcuate cross section with a radius of about 20R.

As described above, the material holding member 32e of the female die 32 is
In addition, as shown in FIG.
Since the material slip-in introduction surface portion 167 is formed in an inclined shape on the inner surface 165 side of the recess, the material holding member 32e and the blank holder 33.
The material 17a clamped and fixed by and can be smoothly slid into the female die 32 by the material sliding introduction surface portion 167, and the radius R of the arc-shaped cross-section portion 166 is sufficiently large due to the product shape. Even if it is not possible, it is possible to relieve the severe draw condition in the material sliding introduction surface portion 167, so that it is possible to reduce scratches on the drawing surface of the material 17a.

Next, the operation of this press machine will be described with reference to FIG.

Male mold by material handling robot 63 (FIG. 3)
When the material 17a is carried in between the 31 and the female die 32, as shown in FIG.
As shown in (a), the blank holder 33 around the male die 31 is pushed up by the die cushion cylinder 42 via the push rod 46, etc.
The material 17a is received on the upper surface of the blank holder 33
The material clamp claws 122 provided on both left and right side surfaces of the
The material 17a is clamped by 22 for accurate positioning.

As shown in FIG. 13B, the female die 32
By pressing down the hydraulic cylinder 38 (Fig. 2)
The peripheral edge of the material 17a is clamped by 32 and the blank holder 33, and further clamped by the stronger female die pressing force of the hydraulic cylinder 38 against the blank holder pushing force of the die cushion cylinder 42. The material 17a is lowered and the drawing process is started.

FIG. 13C shows a material pressing state in which the drawing of the material 17a by the male die 31 and the female die 32 has been completed, and after this pressing state, FIG. , The female cylinder 32 is pulled up by the hydraulic cylinder 38 to release the molded product 17b and the die cushion cylinder 4
Blank holder 3 via push rod 46 etc. by 2
3 is pushed up, and the molded product 17b is pushed up onto the male die 31.

As shown in FIG. 2, the molded product 17b is adsorbed by the molded product adsorbing means 66c of the material handling robot 63 and carried out of the press body mechanism 34.

Next, referring to FIG. 14, the mold apparatus 30
The action and effect of will be described.

As shown in FIGS. 14 (a) and 14 (b), when the material 17a sandwiched between the female die 32 and the blank holder 33 is pressed against the male die 31 and drawn, Between each block 31a, 31b, 31c of the mold 31, between each block 32a, 32b, 32c of the female mold 32, each block 3 of the blank holder 33
Between 3a, 33b, 33c1 and 33c2, male die 31 and blank holder 33
Between the blocks of the blank holder 33 and between the blocks of the blank die 33 and the female die 32 act to displace the blocks. However, the first, second and third block displacement prevention means described above. 72, 75, 87, a male die / blank holder guiding / positioning means 111 as a fourth block position deviation preventing means, and a female die / blank holder guiding / positioning means 114 as a fifth block position deviation preventing means. It is possible to prevent misalignment between blocks in a complex manner.

For example, each block 32a, 32b of the female die 32,
During the drawing process, an expansion force acts between the male and female molds 31 between the blocks 32c, but against the force in this direction, not only the connecting bolt 81 but also the first and third block position deviation preventing means. Since 72, 87 and the like also resist, displacement between the blocks 32a and 32c of the female die 32 and between the blocks 32b and 32c in the separating direction is prevented, and an inclined division seam between these blocks is prevented.
No gap is created in 71.

Even when a gap is formed in the inclined split seam 71 between the blocks 32a and 32c and between the blocks 32b and 32c of the female die 32, these inclined split seams 71 are formed in the sliding direction of the material 17a ( Since the material 17a being drawn is inclined with respect to the vertical direction),
Since the effect of the split seam does not concentrate locally on the drawing surface of the material 17a, the surface of the molded product 17b shown in FIGS. 14C and 14D has a block in the female die 32. Scratches corresponding to the inclined split seams 71 between the blocks 32a and 32c and between the blocks 32b and 32c are less likely to occur, and deterioration of the finished surface accuracy on the drawing surface of the molded product 17b can be prevented.

FIG. 14 (e) shows molding of only the central blocks of the male die 31, the female die 32 and the blank holder 33 by using a die device (not shown) in which a longer one is replaced. A longer molded product 17c is shown.

That is, when processing such a molded product 17c, the blocks 31a, 31b of the male die 31 divided into three parts,
Of the blocks 31a, 32b, 32c of the female die 32 and the blocks 33a, 33b, 33c of the blank holder 33, only the central block 31c, 32c, 33c is recombined with a different size, and the remaining blocks 31a.・ 31b, 32a ・ 32b, 33a ・ 33b
Can be used as it is, just by adjusting the interval.

Next, in FIG. 15, the material unnecessary portion 17a1 which will remain in a protruding shape between the female die 32 and the blank holder 33 after being drawn by the material 17a sandwiched between them is previously cut. The embodiment in which the shearing means 171 for dropping is provided is shown.

This shearing means 171 is shown in FIG.
(A) As shown in (b), mating with the male die 31
The shearing cutting blades 172 are provided at the four corners of the concave-shaped female die 32 for drawing 17a, and the cutting receiving blades are provided at the four corners of the blank holder 33 on the receiving side thereof.
173 are provided respectively.

The shirring cutting blade 172 and the cutting receiving blade 173 provided at each of these four corners are arranged outside the restraining beads 162, 163 as the material restraining means shown in FIG. When the material 17a is sandwiched between the die 32 and the restraining beads 162, 163 of the blank holder 33, the material unnecessary portion 17a1 which remains after the drawing process is formed on the outside of the restraining beads 162, 163 by the shirring cutting blade 172. As shown in FIG. 15 (c), the cutting blade 173 cuts off the material in advance, and wrinkles from the periphery of the material 17a at the time of drawing, in particular, the material unused portion 17a1 protruding outside the restraining beads 162, 163. Wrinkles are prevented from occurring in advance.

That is, as shown in FIGS. 15 (c) and 15 (d), the material-unused portion 17a1 remaining in a protruding shape on the outside of the restraining beads 162, 163 serves as resistance during the drawing process, and the molded product
Since it causes wrinkles that deteriorate the finishing surface accuracy of 17b1, by cutting off this material unnecessary portion 17a1 in advance by the shirring means 171, the material unnecessary portion 17a1 at the time of drawing processing.
Restraint beads during drawing while preventing wrinkles from occurring
Due to the material pressing effect of restraining the peripheral portion of the material 17a with an appropriate force by 162 and 163, wrinkles are prevented from being generated from the periphery of the material 17a during drawing, and the accuracy of the finished surface of the molded product 17b is prevented from deteriorating.

FIG. 15E shows such a material unnecessary portion.
A mold device provided with shearing means 171 for cutting off 17a1 in advance, and replacing only the central blocks 31c, 32c, 33c of the male mold 31, the female mold 32 and the blank holder 33 with a longer one (Fig. A longer molded product 17c1 molded using (not shown) is shown.

According to the embodiment shown in FIG. 15, the inclined division seam 71 as a finish surface precision deterioration preventing means for preventing the deterioration of the finish surface accuracy when the divided portion between the blocks acts on the material 17a. And the female die 32 and the blank holder 33 are made of a material to prevent the material from being pressed and wrinkles during drawing.
Restraining beads 162 and 163 as material restraining means provided in a step shape on the material fixing surface for sandwiching 17a, and the restraining beads.
Female mold 32 and blank holder 33 provided outside 162, 163
A mold device 30 having shearing means 171 for cutting off the material unnecessary portion 17a1 remaining in a protruding state between them after drawing with the material 17a sandwiched between
The scratches on the material at the divided parts between the blocks, and the material unnecessary part 17a1 sandwiched by the female mold 32 and the blank holder 33.
As a result, it is possible to prevent the precision of the finished surface of the molded product 17b1 or 17c1 from being deteriorated due to the wrinkles caused by the above, and the precision of the finished surface is synergistically improved.

Next, since the embodiment shown in FIGS. 1 to 15 is the mold apparatus 30 in which the male mold 31 is the lower mold and the female mold 32 is the upper mold, Male mold 31 and upper female mold
Since the molded product 17b is squeezed into a downward opening by 32 and 32, the molded product 17b is taken out from between the male mold 31 and the female mold 32 in the same posture and transferred to the trim processing position,
The unneeded portion around the molded product 17b is removed in the same posture without being inverted.

That is, as shown in FIG. 16 (a), the downwardly-opened molded product 17b1 in which the material unused portion 17a1 is cut off is left as it is, and the male mold 31 and the female mold 32 are held.
And transfer to the trim processing position, laser cutting the periphery of the molded product 17b1 with the NC laser cutting machine 174 of the numerical control type in the same posture without reversing,
The exterior plate 17b2 used for the counterweight is divided into a peripheral unused portion 17b3 and the exterior plate 17b2 after the trim processing.
And the front subassembly member 17b4 shown in FIG. 16B can be combined as shown in FIG. 16C to complete the counterweight assembly 17b5.

Next, in the mold apparatus 30a shown in FIGS. 17A and 17B, the male mold 31 is the upper mold and the female mold 32 is the lower mold. As described above, when the lower die is the female die 32, the air bearing 131 and the block moving mechanism 133 are provided in the female die 32.

FIGS. 17 (a) and 17 (b) show another embodiment of the finish surface precision deterioration preventing means. As the finish surface accuracy reduction preventing means, each block 31 in the male die 31 is used.
The blocks 32a, 32c, 32c of the female die 32 are different from the blocks 175, 175 between the a / 31c, 31c / 31b and the blocks 176, 176 between the blocks 33a / 33c, 33c / 33b in the blank holder 33.
This is an example in which an offset split seam 178 is provided by offsetting the split seams 177, 177 between 32b, and the width between the split seams of the female die 32 is larger than the width between the split seams of the male die 31 and the blank holder 33. Is widely formed.

The offset division seam 178 is
Split seam between each block 31a ・ 31c, 31c ・ 31b on the male die 31 side
175, 175 and each block 32a, 32c, 32c, 32b on the female die 32 side
By offsetting the split seams 177, 177 between them, the effect of the split seams between these opposing blocks on each other is reduced, and for example, the block 32c of the female die 32 tends to be displaced toward the male die 31 side. Even it's a male mold 31 whole block
17a, 31b, and 31c are locked and prevented, so that FIG.
Split seam 1 on the surface of the molded product 17b shown in (c) and (d).
You can reduce the scratches that 77 and 177 make.

FIG. 17 (e) shows a male die 31, which is an upper die,
A longer die formed by using a die device (not shown) in which only the central blocks 31c, 32c, and 33c of the lower die female die 32 and the blank holder 33 are replaced with longer ones. A long molded product 17c is shown.

Next, the method for changing over the male die 31, the female die 32 and the blank holder 33 will be described. It should be noted that, when performing the set-up of these molds, the mold device 30 is used for the press body mechanism.
Take out to the outside of 34.

First, as shown in FIG. 6, the male mold 31 is reassembled and set up by removing the blank holder 33 from the plate 31d of the male mold 31 using a grain or the like, as shown in FIG. Plate 31d of male mold 31 and each block 31a, 31
The positioning key 90 for positioning b and 31c is pulled out from the key grooves 88 and 89, and the bolt 91 for fixing the plate 31d of the male die 31 and the blocks 31a, 31b and 31c is removed as shown in FIG. Next, the nut 82 is removed from the connecting bolt 81 between the blocks 31a, 31b, 31c, and then the air pool recesses 137 provided in the blocks 31a, 31b on one side and the other side are removed as shown in FIG. Supply hose 139 to hose connection pipe 138
And supplying compressed air to the air reservoir recess 137 to cause the air bearing 131 to function so that the blocks 31a and 31b on one side and the other side can be easily moved. ) And as shown in FIG. 11, by attaching the handle 151 to the handle attaching boss 149 and rotating the male screw 145, the blocks 31a and 31b on one side and the other side are
Move in the direction away from the central block 31c to increase the distance, and then use a crane etc. to move the central block 31c.
c is removed from the plate 31d of the male die 31 and replaced with another central block 31c of different size, and then the male screw 145 is turned by the handle 151 to rotate the male block 145 on one side and the other side of the central block 31c. 31a, 31b are brought close to each other, and then the positioning key 90 is driven into the key grooves 88, 89 of the plate 31d of the male die 31 and the blocks 31a, 31b, 31c, respectively. 31a, 31b, 31c are accurately positioned, then each block 31a, 31b, 31c is connected by tightening the connecting bolt 81 and nut 82, and then the air supply hose 139 to the air reservoir recess 137 is removed. The air is evacuated and finally the plate 31d of the male die 31 and the blocks 31a, 31
B and 31c are fixed by tightening bolts 91.

Further, the method for changing the blank holder 33 is similar to the method for changing the male mold 31. The plate 33d of the blank holder 33 removed from the male mold 31 and each block 3 are removed.
The positioning key 90 for positioning the 3a, 33b, 33c1, and 33c2 is removed from the key grooves 88 and 89, and the plate 33d of the blank holder 33 and each block 33a, as shown in FIG.
The bolt 93 for fixing 33b, 33c1 and 33c2 is removed, and then the nut 82 is removed from the connecting bolt 81 between the blocks 33a, 33b, 33c1 and 33c2. By connecting an air supply hose to the hose connection pipe 143 and supplying compressed air to the air reservoir recess 142, the air bearing 132 is made to function, and then, as shown in FIGS. By attaching the handle 151 to the 157 and rotating the male screw 154, the blocks 33a and 33b on the one side and the other side are moved in the direction away from the blocks 33c1 and 33c2 in the center to widen the space, and then the crane is moved. The central blocks 33c1 and 33c2 are detached from the plate 33d using another central block 33c1 and 33c2 of different sizes.
Then, the male screw 154 is rotated by the handle 151 to bring the blocks 33a and 33b on one side and the blocks 33a and 33b on the other side closer to the central blocks 33c1 and 33c2, and the positioning key 90 is then placed in the matching key grooves 88 and 89. Drive the plate 33d and the blocks 33a, 33b, 33c of the blank holder 33 with this positioning key 90.
Accurately position 1, 33c2, and then each block 33a, 33c
b, 33c1, 33c2 are connected by tightening a connecting bolt 81 and a nut 82, then the air supply hose connected to the air reservoir recess 142 is removed to remove air, and finally the blank holder 33
The plate 33d and the blocks 33a, 33b, 33c1, 33c2 are fixed by tightening bolts 93.

Also, the method for changing over the female die 32 is shown in FIG.
The mold reassembling device 181 shown in FIG.

As shown in FIG. 18 (a), this mold changing device 181 supports a movable body 182 on one side that supports a block 32a on one side of the female mold 32 and a block 32b on the other side. The moving body 183 on the other side and the central moving body 184 that supports the central block 32c are movably provided on the flat surface of the base body 185.

Each of the moving bodies 182, 183, and 184 is provided with a plurality of air bearings 186 in a bowl-like shape on the lower side facing the base body 185. By supplying compressed air from the air compressor, each moving body 182, 183, 184 is moved to the base body 185.
It is designed so that it can float freely from the flat surface and can be moved horizontally.

Further, in each of the moving bodies 182, 183, 184, a plurality of block supporting portions for supporting the blocks 32a, 32b, 32c are provided on the upper side of the female die 32 facing the blocks 32a, 32b, 32c. 187 are provided respectively.

Then, as shown in FIG.
The blocks 32a, 32b, 32c of the female die 32 are placed on the block support portions 187 of the moving bodies 182, 183, 184, and then the plate 32d of the female die 32 and the blocks are placed as shown in FIG. 32a,
All the bolts 92 for fixing 32b and 32c are removed, and then the positioning key 90 for positioning the plate 32d of the female die 32 and the blocks 32a, 32b and 32c, respectively, is removed from the key grooves 88 and 89, and next. The plate 32d of the female die 32 is lifted and removed by a crane (not shown), and then each block 32a, 32b, 32
Remove the nut 82 from the connecting bolt 81 that fixes between c, then hang the crane wire on the central block 32c, then inject compressed air into the air bearing 186 of each moving body 182, 183, 184. Then, each moving body 182, 183, 184 is allowed to move with a small force.

In this state, as shown in FIG. 18B, the right moving body 183 is moved to the right, the right block 32b is horizontally moved to the right, and the interval with respect to the central block 32c is widened. After that, the central moving body 184 is moved to the right side to separate the central block 32c from the left side block 32a, and then the central block 32c is lifted from above the central moving body 184 using a crane. As shown in FIG. 18 (c), it is recombined with the central block 32c of another size, and this recombined block 32c is placed on the block support portion 187 of the central moving body 184 and brought close to the left block 32a, and further on the right The block 32b is brought close to the central block 32c, and then a plurality of connecting bolts 81 are inserted into each of the blocks 32a, 32b, 32c and tightened evenly. Then, as shown in FIG. , Plate 32d on 32b, 32c ,
The plate 32d of this female die 32 and each block 32a, 32b, 32c
Temporarily tighten and with bolts 92. Next matching keyway 8
A positioning key 90 is driven into 8, 89 to accurately position the plate 32d of the female die 32 and each block 32a, 32b, 32c by the positioning key 90, and then all temporarily tightened bolts 92
Is tightened, and finally air supply to the air bearing 186 is stopped.

As described above, the loading / unloading of the die unit 30 assembled to the hydraulic single-action deep drawing press machine is automated by the die transfer chain conveyor 54 and the die clamp mechanism 60, and the material handling robot 63 is used. (EN) Provided is a fully automatic press machine in which loading and unloading of materials 17a and molded products 17b are automated.

The male die 31, the female die 32 and the blank holder 33 described above are the counterweights 17 mounted on the hydraulic excavator 11 as the swing type working machine shown in FIG.
16 is an example of a die device 30 for deep-drawing the outer plate 17b2 (FIG. 16) of FIG.
Scratches appearing on the surface of b2 are slight, and the appearance quality is not impaired. The multi-division deep drawing die device is not limited to the die device dedicated to the counterweight, and can be widely applied to molded articles in other fields as a die device that can be partially recombined.

Further, although the present mold apparatus has been described as a mold apparatus of a multi-division system, the other characteristic mechanism which is not recombined is a mold apparatus which can be sufficiently applied as an integrated mold apparatus.

[0156]

According to the invention described in claim 1, the male mold,
Since the female mold and the blank holder each have a plurality of blocks that are separately formed so that they can be recombined and are integrally connected, by recombining only some of the blocks, the other blocks can be used as they are, It is possible to provide an inexpensive mold device that can be partially recombined.

According to the second aspect of the present invention, the scratches caused on the material by the divided portions between the male die, the female die and the blank holder blocks can be reduced by the finish surface precision reduction preventing means.

According to the third aspect of the present invention, since the finish surface accuracy reduction preventing means is an inclined division seam formed in an inclined shape between the blocks with respect to the sliding direction of the material to be drawn, during drawing processing. Even if the material of is pressed against the inclined split seam between blocks, the material slides in the direction intersecting the inclined split seam between blocks, so the influence of the inclined split seam between blocks on the drawing surface of the material is small, The surface of the molded product is not easily scratched.

According to the fourth aspect of the present invention, the finish surface accuracy deterioration preventing means offsets the dividing seam between the blocks of the female mold to the dividing seam between the blocks of the male mold and the blank holder. Since it is a seam, by offsetting the split seam between the blocks on the male die side and the block on the female die side by this offset split seam, the effect of the split seams between the opposing blocks on each other is Less and less likely to scratch the surface of the molded product.

According to the fifth aspect of the invention, the peripheral edge portion of the material constrained by the step-shaped material constraining means provided on the material fixing surfaces of the female die and the blank holder slips excessively during drawing. Since there is no wrinkle, it is possible to suppress wrinkles that occur in the material when slippage is excessive, and it is possible to prevent deterioration of the finished surface accuracy of the molded product due to wrinkles.

According to the sixth aspect of the present invention, the material-unused portion remaining in a protruding shape on the outer side of the material restraining means becomes a resistance during drawing and causes wrinkles that deteriorate the finishing accuracy of the molded product. Therefore, by cutting off the unnecessary portion of the material by the shirring means in advance, it is possible to suppress the generation of wrinkles from the periphery of the material at the time of the drawing process and prevent the accuracy of the finished surface of the molded product from decreasing.

According to the invention described in claim 7, a finish surface precision deterioration preventing means for preventing a decrease in finish surface accuracy when the divided portion between the blocks acts on the material, and a material retainer and a wrinkle at the time of drawing. Between the female die and the blank holder, which are provided outside the material restraining means, in which the female die and the blank holder sandwich the material in order to prevent the occurrence of the material A die device provided with a shirring means for preliminarily cutting off a material unnecessary portion which remains in a protruding state between these after being drawn with the material to be sandwiched is scratched by a material at a divided portion between blocks, and a female member. It is possible to prevent deterioration of the finished surface accuracy of the molded product due to wrinkles generated from the material unnecessary portion sandwiched by the mold and the blank holder, and it is possible to synergistically improve the finished surface accuracy.

According to the eighth aspect of the present invention, the concave inner surface side of the arcuate cross section formed at the concave opening edge located between the material fixing surface of the female die and the concave inner surface is cut out in an inclined shape. Since the material slip-in introduction surface portion is formed, even if the radius of the arc-shaped cross-section portion cannot be made sufficiently large, the material slip-in introduction surface portion formed in an inclined shape on the inner surface side of the concave portion of the arc-shaped cross-section portion,
It is possible to smoothly slide the material fixed by the blank holder into the female mold, alleviate severe drawing conditions, and reduce scratches on the drawing surface of the material.

According to the invention described in claim 9, the block position shift preventing means for preventing the position shift between the plurality of blocks can prevent the position shift between the blocks, and the position shift between the blocks can prevent the molded product from being displaced. Prevents scratches on the surface.

According to the tenth aspect of the invention, at the time of drawing, the guide positioning convex member of the blank holder is fitted into the guide positioning concave groove of the female die so that the blank holder and the block of the female die are mutually connected. It is possible to prevent the position shift of
The guide positioning convex members on both sides of the blank holder, which receive a force in the direction of contraction by the fitting with the female mold, hold each block of the female mold so as to hold it, so when expanding, the space between the male mold and the block is expanded. It is possible to suppress the expansion between the blocks of the female mold that receives a force in the direction, to suppress the generation of the gap due to the expansion between the blocks, and to reduce the scratches on the surface of the molded product when the generation of the gap is remarkable.

According to the eleventh aspect of the present invention, the block position deviation preventing means is fixed and provided on the dividing surface of the one block which is joined to each other and the fixed positioning convex member which is provided on the dividing surface of the other block. Since the fixed positioning concave member that fits with the positioning convex member is provided, by fitting the fixed positioning convex member and the fixed positioning concave member, it is possible to prevent misalignment between blocks that are joined to each other on the dividing surface, and It is possible to prevent scratches on the surface of the molded product due to the displacement of

According to the twelfth aspect of the present invention, the block position deviation prevention means is provided with a common plate to which a plurality of blocks are fixed, and key grooves respectively provided on the facing surfaces of the blocks, and these key grooves. Since the positioning key fitted in the key groove is provided, the common plate and the plurality of blocks can be integrated by the positioning key fitted in these key grooves, and the blocks that are joined to each other at the dividing surface can be integrated. Can be prevented through the common plate, and the scratches on the surface of the molded product due to the displacement between the blocks can be prevented.

According to the thirteenth aspect of the invention, the male mold
The blank holder guide positioning means guides and positions the vertical movement between the male die and blank holder during drawing, and the female die / blank holder guide positioning means moves the female die / blank holder vertically. Since it guides and positions the male die, the blank holder and the female die, the vertical movement between the respective dies can be smoothly guided, and the male die, the blank holder and the female die during the vertical movement can be guided. It is possible to prevent positional deviation between the mold blocks, and to prevent the surface of the molded product from being scratched due to the positional deviation between the mold blocks.

According to the fourteenth aspect of the invention, since the material positioning mechanism for positioning the material carried in between the male mold and the blank holder and the female mold, the material carrying-in position is not accurate. Can also accurately position the material.

According to the invention of claim 15, a male die,
The lower die of the blank holder and the female die is an air bearing that forms an air film between a common plate and a block located above the common plate to allow the block to move, and this air bearing. Since it is equipped with a block moving mechanism that moves the freely movable block in the block indirect separating direction, when rearranging a part of the block of the mold located below, the air bearing is made to function and it is adjacent to the block. By making the blocks movable and moving the adjacent blocks on the plate by the block moving mechanism, it is possible to facilitate the work of separating or joining the blocks.

According to the sixteenth aspect of the invention, since the male die is the lower die and the female die is the upper die, a downward opening shape is formed by the lower male die and the upper female die. Take the molded product that has been drawn to the position between the male mold and the female mold in the same posture, transfer it to the trim processing position, and remove the unnecessary parts around the molded product in the posture without turning it. You can
The trim processing can be done easily.

According to the invention of claim 17, a male die,
Since the female mold and blank holder are mold devices that draw the outer plate used for counterweight of the swing type working machine, the counterweight has high surface accuracy by the molded product with few scratches during drawing. Can be manufactured.

According to the eighteenth aspect of the present invention, a die device equipped with the above male die, female die and blank holder, and one of the female die and the blank holder are pressed against the other to sandwich the material. Since it is a press machine equipped with a press body mechanism that presses and presses one of the male die and the female die against the other to draw the material, an inexpensive die device that can partially recompose The press machine can also be constructed at low cost.

According to the nineteenth aspect of the present invention, there is provided a press machine equipped with a die transfer mechanism for loading the die device into the press body mechanism from the outside of the press body mechanism and unloading it from the press body mechanism to the outside. Therefore, the die transport mechanism can automatically load and unload the die apparatus into and from the press body mechanism, which can reduce the burden on the operator.

According to the twentieth aspect of the present invention, a press equipped with a robot for introducing the material between the male die and the blank holder and the female die and for ejecting the molded product after the drawing process from between them. Since it is a machine, the material can be automatically carried in and out between the male die and the blank holder and the female die by the robot, and the work efficiency can be improved and the burden on the operator can be reduced.

According to the twenty-first aspect of the present invention, there are provided a die transfer mechanism for loading the die device from the outside of the press body mechanism into the press body mechanism and unloading it from the press body mechanism to the outside. A mold clamping mechanism that fixes and releases the male and female dies, and the material that is carried in between the male and blank holders and the female dies, and the molded product after drawing. Since it is equipped with a robot that can be carried out from between the robots, the die transfer mechanism can automate the loading and unloading of the die device to and from the press body mechanism, and the die clamping mechanism can automate the attachment and detachment of the die device to and from the press body mechanism. As a result, the loading and unloading of materials can be automated, so that a fully automatic press machine can be provided.

According to the twenty-second aspect of the invention, the robot suction-supports a plurality of material suction means arranged in a relatively upper stage for suction-supporting the flat material, and the molded product after drawing. Therefore, since a robot hand having a plurality of molded product suction means arranged in a relatively lower stage by a deformable suspension means is provided, a robot hand of one robot sucks a material in a relatively upper stage. The material can be carried in by means of the means, and the deformed hanging means can carry out the concavo-convex shaped product after drawing by means of the molded product suction means arranged in the relatively lower stage, so that one robot can be efficiently used.

According to the twenty-third aspect of the present invention, the press main body mechanism has columns which are located on one side and the other side in the longitudinal direction of the die apparatus, and a die vertical moving member which is vertically moved along these columns. A rack provided on each of the columns, and a pinion that is integrally fitted to one end and the other end of a shaft rotatably provided on the mold up-and-down moving member and meshes with the rack of each column. Since it is equipped with a rack, shaft, and pinion, an equalizer device, that is, a balancer, which evenly distributes the eccentric load, is configured, and the mold vertical moving member always moves vertically even when the eccentric load acts. Therefore, it is possible to cope with a mold device having a large mass.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a press machine according to the present invention.

FIG. 2 is a side sectional view of the same press machine.

FIG. 3 is a cross-sectional view of the press machine showing a state in which a material handling robot carries a material into a mold device mounted on the same press machine.

FIG. 4 is a cross-sectional view of the press machine showing a state in which the male mold and the blank holder of the mold device and the female mold are closed.

FIG. 5 is a front cross-sectional view showing an embodiment of a mold apparatus according to the present invention.

FIG. 6 is an exploded perspective view of the above mold apparatus.

FIG. 7 (a) is an exploded perspective view showing a female mold of the same mold device, FIG. 7 (b) is a sectional view showing an example of positioning means between blocks of the female mold, and FIG. 7 (c) is its positioning. Sectional drawing which shows the other example of a means, (d) is sectional drawing which shows another example of the positioning means.

FIG. 8 is a cross-sectional view showing a connection state between the respective blocks of the female die in the same die apparatus.

FIG. 9 is a cross-sectional view showing an air bearing structure of a male die in the same die apparatus.

FIG. 10A is a plan view showing a block moving mechanism of a male mold in the same mold apparatus, and FIG. 10B is a plan view showing a block moving mechanism of a blank holder.

FIG. 11 is a cross-sectional view showing a block moving mechanism of a male die and a blank holder in the same die apparatus.

FIG. 12 (a) is a sectional view showing a state in which a material is drawn by the same die device, FIG. 12 (b) is an enlarged sectional view of a portion b in the drawing a, and FIG. 12 (c) is a portion c in the drawing a. It is explanatory drawing which expanded the material slip-in introduction surface part formed in.

13A is a sectional view of the press machine showing a material clamp state in which the material is set in the mold device, FIG. 13B is a sectional view of the press machine showing a material bending start state, and FIG. Sectional drawing of the press machine which shows a push-cut state, (d) is sectional drawing of the press machine which shows the waiting state for carrying out the molded product after material bending is completed.

FIG. 14 (a) is a sectional view of the die apparatus showing a state before material processing by the same die apparatus, FIG. 14 (b) is a sectional view of the die apparatus showing a state at the end of material drawing processing, and FIG. ) Is a plan view of the molded product, (d) is a front view of the molded product, and (e) is a front view of another molded product molded by the rearranged mold device.

FIG. 15 (a) is a cross-sectional view of a mold device showing a state before material processing by a mold device having shearing means,
(B) is a cross-sectional view of the die device showing a state at the end of the material drawing process, (c) is a plan view of a molded product with a material unnecessary portion cut off, (d) is a front view of the molded product, (E) is a front view of another molded product molded by the rearranged mold device.

FIG. 16 (a) is a perspective view showing a state where a drawn product is trimmed by a laser cutting machine, and FIG.
Is a perspective view showing a front subassembly member of the counterweight, and (c) is a perspective view of a counterweight assembly constituted by a trimmed member and a front subassembly member.

FIG. 17 (a) is a cross-sectional view of a die device showing a state before material processing by a die device having a male die as an upper die and a female die as a lower die, and FIG. A cross-sectional view of the mold device showing a state at the end of material drawing, (c) a front view of the molded product, (d) a plan view of the molded product, (e) molded by a remolded mold device. It is a front view of another molded product.

FIG. 18 (a) is a front view showing a state in which a female die in the same die apparatus is placed on a die reassembling apparatus, and FIG. 18 (b) is a front view showing a state in which each block of the female die is separated. , (C) is a front view showing a state in which the central block is recombined with one of a different size, and (d) is a front view showing the female mold after the blocks are recombined.

FIG. 19 is a side view of a hydraulic excavator equipped with counterweights.

FIG. 20 shows a drawing process using a conventional die,
(A) Sectional drawing which shows the state which supplied the material between a male mold and a blank holder, and a female mold, (b) The state which molds the material clamped by a blank holder and a female mold by a male mold. Sectional drawing which shows, (c) Sectional drawing which shows the state which completed the shaping | molding of the material by a male mold and a female mold, (d)
It is sectional drawing which shows the state which lifted the male mold and the blank holder, and opened the molded product.

[Explanation of symbols]

11 Hydraulic excavator as a swivel work machine 17 Counterweight 17a Material 17a1 Material-unused portion 17b that remains in a protruding shape 17b Molded product 17b2 Exterior plate 30 Mold device 31 Male mold 32 Female mold 33 Blank holder 31a, 32a, 33a 1 Blocks 31b, 32b, 33b on the other side Blocks 31c, 32c, 33c1, 33c2 on the other side Blocks 31d, 32d, 33d in the center Plate 34 Press body mechanism 36 Posts 39 Intermediate frame as mold up-and-down moving member 51 Rack 52 Shaft 53 Pinion 54 Mold transfer chain conveyor as mold transfer mechanism 60 Mold clamp mechanism 63 Material handling robot as material handling robot (material handling robot) 66a Material suction means 66b Suspension means 66c Molded product suction means 71 Inclined split seam 72 Block position deviation prevention means 73 Guide positioning convex member 74 Guide positioning concave groove 75 Block position deviation prevention means 76 Fixed positioning convex member 77 Fixed positioning recessed material 87 Block position deviation prevention means 88, 89 Key groove 90 Positioning key 111 Male mold / blank holder guide positioning means 114 as block position deviation prevention means Female mold / blank holder as block position deviation prevention means Inter-guide positioning means 121 Material positioning mechanism 131, 132 Air bearing 133, 134 Block moving mechanism 162, 163 Restraining bead 164 as material restraining means 164 Material fixing surface 165 Recess inner surface 166 Circular cross section 167 Material sliding introduction surface 171 Shirring means 175, 176, 177 Split seam 178 Offset split seam as a means to prevent deterioration of finished surface accuracy

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // B21D 22/02 B21D 22/02 C (72) Inventor Chozaburo Morimoto 4-10, Yoga, Setagaya-ku, Tokyo No. 1 In New Caterpillar Mitsubishi Corporation (72) Inventor Takayoshi Nakahara 14-3 Minami Futami, Futami-cho, Akashi-shi, Hyogo Prefecture Nakahara Stock Company (72) Inventor Go Okubo Nagao-cho, Kita-ku, Kobe-shi, Hyogo No. 41 Chuo F-term in Sankyo Co., Ltd. (reference) 4E050 BA02 CA01 CA05 CD04

Claims (23)

[Claims] 1. A male die formed in a convex shape, a female die formed in a concave shape to be fitted with the male die to draw a material, and a female die fitted around the male die A blank holder that faces the mold and fixes the periphery of the material at the time of drawing, and the male mold, the female mold, and the blank holder are formed so as to be recombinationally divided and are integrally combined. A mold apparatus characterized by comprising blocks respectively. 2. The mold apparatus according to claim 1, further comprising a finish surface precision deterioration preventing means for preventing deterioration of the finish surface accuracy when the divided portion between the blocks acts on the material. 3. The mold device according to claim 2, wherein the surface finish accuracy reduction preventing means is an inclined division seam formed between the blocks in an inclined shape with respect to the sliding direction of the material to be drawn. . 4. The surface finish accuracy reduction preventing means is an offset split seam in which the split seam between the blocks of the female die is offset from the split seam between the blocks of the male die and the blank holder. The mold device according to claim 2. 5. A material restraining means provided in a stepped manner on a material fixing surface for sandwiching the material between the female die and the blank holder in order to prevent material pressing and wrinkling during drawing. The mold apparatus according to any one of claims 1 to 4. 6. A shirring means provided outside the material restraining means and previously cutting off a material-unnecessary portion remaining in a protruding shape between the female die and the blank holder after being drawn with the material sandwiched between the female die and the blank holder. The mold apparatus according to claim 5, further comprising: 7. A finish surface precision deterioration preventing means for preventing deterioration of the finish surface accuracy when a divided portion between blocks acts on a material, and a female die for preventing material pressing and wrinkling during drawing processing. And the blank holder hold the material between the material restraining means provided in a stepped manner on the material fixing surface, and the material held outside the material restraining means and held between the female die and the blank holder after drawing. 5. A mold device according to claim 1, further comprising shearing means for cutting off a material-remaining portion remaining in a protruding shape in advance between them. 8. An arc-shaped cross-section formed on the opening edge of the recess located between the material fixing surface of the female die facing the blank holder and the inner surface of the recess, and the arc-shaped cross-section inclined toward the inner surface of the recess. 8. The mold device according to claim 1, further comprising a material slip-in introduction surface portion formed by cutting out. 9. The mold apparatus according to claim 1, further comprising block position deviation prevention means for preventing position deviation between a plurality of blocks. 10. The block position deviation preventing means comprises a guide positioning convex member which is provided so as to project toward the female mold side from one side and the other side in the longitudinal direction of the blank holder, and which regulates the positional deviation in the longitudinal direction between the blocks of the female mold. 10. The mold apparatus according to claim 9, further comprising: a guide positioning concave groove provided on the female mold side to be fitted with each of the guide positioning convex members. 11. The block position deviation preventing means includes a fixed positioning convex member provided on a divided surface of one block and a fixed positioning convex member provided on a divided surface of the other block to be fitted to each other. The mold device according to claim 9 or 10, further comprising a positioning recess material. 12. The block position deviation preventing means comprises a common plate to which a plurality of blocks are fixed, key grooves provided on respective surfaces facing each other, and a positioning key fitted in these key grooves. The mold apparatus according to any one of claims 9 to 11, further comprising: 13. The block position deviation prevention means is provided on the outer side surface of the male mold and the inner side surface of the blank holder, and guides the vertical movement between the male mold and the blank holder and also between the male mold and the blank holder. Positioning means for guiding between male die / blank holder for positioning, and up / down movement between female die / blank holder provided on outer surface of female die and outer surface of blank holder and female die / blank holder 13. The mold apparatus according to claim 9, further comprising: a female mold / blank holder guide positioning unit for positioning the space. 14. A material positioning mechanism for positioning the material carried in between the male mold and the blank holder and the female mold, is provided.
The mold device according to any one of 1. 15. The male mold, the blank holder, and the female mold located on the lower side of the female mold form an air film between a common plate and a block located on the upper side of the common plate to move the block. 15. The mold apparatus according to claim 1, further comprising: an air bearing, and a block moving mechanism that moves a movable block in a block indirect separating direction by the air bearing. 16. The mold apparatus according to claim 1, wherein the male mold is a lower mold and the female mold is an upper mold. 17. The male die, the female die, and the blank holder are for drawing an exterior plate used for a counterweight of a revolving type working machine, according to any one of claims 1 to 16. Mold equipment. 18. A mold apparatus comprising the male mold, the female mold and the blank holder according to claim 1, and one of the female mold and the blank holder is pressed against the other to sandwich the material. A press machine comprising: a press main body mechanism that presses and presses one of a male die and a female die against the other to draw a material. 19. The press according to claim 18, further comprising a die transfer mechanism for loading the die device from the outside of the press body mechanism into the press body mechanism and unloading the die device from the press body mechanism to the outside. machine. 20. A robot for loading the material between the male die and the blank holder and the female die, and for unloading the molded product after the drawing process, between the male die and the blank holder. 19. The press machine described in 19. 21. A mold transfer mechanism for loading the mold device into the press main body mechanism from the outside of the press main body mechanism and for carrying out the mold main body mechanism to the outside, and a male main body and a female mold for the press main body mechanism. A mold clamping mechanism that can fix and release the fixation, and a robot that carries the material between the male mold and the blank holder and the female mold, and carries out the drawn product after drawing. Claim 1 characterized by the fact that it is provided.
The press machine according to any one of 8 to 20. 22. A robot comprises a plurality of material adsorbing means arranged in a relatively upper stage for adsorbing and supporting a plate-shaped material, and a deformable suspending means for adsorbing and supporting a drawn product. 22. The press machine according to claim 20 or 21, further comprising a robot hand having a plurality of molded product suction means arranged in a relatively lower stage. 23. The press main body mechanism is provided on each of the columns, the columns located on one side and the other side in the longitudinal direction of the mold device, the die up-and-down moving member vertically moved along the columns. And a pinion that is integrally fitted to one end and the other end of a shaft that is rotatably provided on the mold up-and-down moving member and that meshes with the racks of the columns, respectively. Item 23. The press machine according to any one of Items 18 to 22.