JPH0232059B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a press working device that performs predetermined press working by bringing press tools such as punches and dies, which are each integrally attached to a pair of holding members, close to each other. It is something.

(Prior art) In general, in press processing equipment that performs forming processes such as shearing, bending, and drawing using a press, press tools such as punches and dies that directly participate in press processing can be moved relatively close to or separated from each other. Usually, they are each held integrally by a pair of holding members, and in addition, auxiliary means such as a knock-out mechanism or a dictation mechanism are often required.

In the past, such auxiliary means were assembled into a press tool so that they were inseparable from the press tool, so that they constituted one mold unit. If there is a change in the shape, dimensions, or processing form of the desired press product, the entire die unit in which such press tools and auxiliary means are combined can be replaced with another die unit. , the setup was changed.

Therefore, both the mold unit to be replaced and the mold unit to be replaced have complex structures, are large in size, and are also heavy, making it difficult to quickly replace molds, and it is important to keep them in stock for replacement. There are problems in that the mold unit requires a considerable number of parts and also requires a large storage space.

On the other hand, an engagement pin is provided in a pin hole that is formed in the holding member and opens on the tool mounting surface to which the press tool is fixed, and is configured to be able to be pushed into the pin hole. Pressing members such as stripper plates, pads, knockout pins, etc. used according to the press tool are arranged on the press tool so that they can be engaged with the engagement pins, and multiple types are used corresponding to the multiple types of press tools. A press working apparatus has been proposed in which the area of the end surface of the engaging pin is sufficiently large so as to be able to engage with each of the pressing members. In such a device, a biasing means for biasing the pressing member is disposed in the holding member and is commonly used for multiple types of mold units. There are advantages such as a reduction in the number of replacement parts and easier setup changes. Unexamined Japanese Patent Publication 1987-
The device described in Publication No. 115927 is one example.

(Problem to be Solved by the Invention) However, since there is only one engaging pin, only a constant biasing force is always applied to the pressing member, and it varies depending on the material and thickness of the workpiece, for example. It is not possible to individually set the magnitude of the urging force that acts on the pressing member depending on the resistance force during mold release, the type and purpose of the pressing member, etc., and an unnecessarily large urging force may be applied. There were problems in that the required biasing force could not be obtained sufficiently.

The present invention has been made against the background of the above circumstances, and its purpose is to enable the biasing force applied to the pressing member via the engagement pin to be appropriately set depending on the type and purpose of the pressing member. There is a particular thing.

(Means for Solving the Problems) In order to achieve such an object, the present invention includes a pair of holding members that can be relatively approached and separated, and a plurality of types of press tools that have mutually different shapes and dimensions, In an apparatus in which any one of the plurality of types of press tools is removably fixed to the holding member to perform predetermined press working, a sub-means such as a knock-out mechanism or a dicing mechanism is (a) formed on the holding member; A number of engagement pins are provided in each of a number of pin holes opened in the tool mounting surface to which the press tool is fixed, and each of the engagement pins is arranged so as to be pushable into the pin hole, and each of the engagement pins is a first spring that is provided on the holding member and can be commonly used regardless of the type of the press tool;
(b) a pressing member that is brought into contact with the workpiece during the press working; and when the pressing member is brought into contact with the workpiece, some of the many engaging pins are pressed against the pins. a second sub-element that is used in combination with the press tool for each type of press tool, including a push pin that is pushed into the hole and causes the biasing force of the spring to act on the pressing member through the engagement pin; It is characterized by consisting of.

Here, the press tool refers to a punch, a die, or the like, which directly performs press processing such as punching, bending, and drawing.

Further, the pressing member may be a stripper plate for discharging the blank punched by a punching die from the punching die, a pad for pressing the peripheral edge of the workpiece to suppress wrinkles during drawing press processing, or the like. .

(Function and Effects of the Invention) In such a press working device, among the secondary means such as the knockout mechanism and the dictation mechanism, the second secondary means such as a pressing member that differs depending on the type of press tool such as the shape of the pressed product is used. The element is combined with a corresponding press tool and is attached to and removed from the holding member together with the press tool, and includes a first subsidiary element that can be used in common regardless of the type of press tool, such as a spring that biases the pressing member. Since the is installed in the holding member, the number of second sub-elements is reduced accordingly, the mold structure of the part used for mold replacement is simplified and costs are reduced, and the replacement part is compact. It requires less storage space. Since the whole thing to be replaced is compact and lightweight, the setup work required for mold replacement can be easily performed.

Moreover, in the press processing apparatus of the present invention, a large number of pin holes are formed in the holding member, and an engaging pin is disposed in each of the pin holes, and each of the engaging pins is independently biased by a spring. On the other hand,
The urging force of the spring is applied to the pressing member by pushing some of the plurality of engagement pins into the pin holes through the pushing pins, so that the pressing member receives the force of the pushing pins. A biasing force corresponding to the number of press members is applied, and the biasing force can be appropriately set depending on the type and purpose of the pressing member, press working conditions, etc.

(Example) Hereinafter, a specific example including the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 2 denotes a main body of the press working apparatus, and a fixed holder 8 is fixed on a bed 4 of the main body 2 via a bolster 6. On the other hand, a movable holder 10 is arranged above the fixed holder 8 and facing each other, and is fixed to the press ram 12 shown in FIG. 2 and fixed together with the press ram 12 while being guided by a plurality of guide posts (not shown). It is possible to approach and separate from the mold holder 8. These fixed holder 8 and movable holder 10 serve as a pair of holding members in this example.

Returning to FIG. 1, the fixed holder 8 has a punch 14 and a drawing die 16, and the movable holder 10 has a punch 18 and a drawing punch 20.
The punching punch 14 and the punching die 18, which face each other, and the drawing die 1 are detachably attached to each other.
In this example, the punch 6 and the drawing punch 20 correspond to the press tools provided at the two press working positions, and constitute the main bodies of the punching die and the drawing die, respectively.

The punch 14 is fixed to a punch plate 22, as is clear from FIG. The punch 14, punch plate 22, and lifter plate 24 are assembled so as to be movable in the direction, and a plurality of punches having different sizes and shapes are prepared as one unit for replacement.

Further, the punching die 18 is integrated with a die plate 26, and a stripper plate 28 having a shape corresponding to the die hole shape is incorporated in the punching die 18 so as to be movable in the vertical direction. A plurality of U-shaped notches 30 are formed around the stripper plate 28 from the lower end surface, and the ends of these U-shaped notches 30 are connected to the die 18.
The stripper plate 28 is brought into contact with a plurality of stopper pins 32 provided protruding from the inner wall of the die, thereby defining a lower limit position of the stripper plate 28. At the lower limit position, the stripper plate 28 and the die 18 The lower end surfaces of the two are substantially flush with each other. Further, a plurality of push-up pins 34 are fixed to the stripper plate 28 from above by screwing. These push-up pins 34 slidably penetrate the die plate 26 in the thickness direction, but when the stripper plate 28 is at the lower limit position, the die plate 2
Its length is determined so that it does not protrude from the top surface of 6. The punching die 18 is the main body, and the die plate 26, stripper plate 28, push-up pin 34, and stopper pin 32 are
constitutes a replacement mold unit.

On the other hand, the drawing punch 20 is integrated with a punch plate 36, and an annular pad 38 corresponding to the cross-sectional shape of the punch 20 is assembled so as to be movable in the vertical direction so as to surround the drawing punch 20. ing. This pad 38 doubles as a blank holder and a stripper, and has a plurality of suspension bolts 40 and push-up pins 42 on its upper end so as to surround the punch 20.
are arranged vertically alternately, and both pass through the punch plate 36 so as to be able to slide in the thickness direction. The head of the suspension bolt 40 is connected to the punch plate 36.
The lower limit position of the pad 38 is defined by contacting the stepped portion formed in the pad 38, and at this lower limit position, the lower end surfaces of the pad 38 and the punch 20 are substantially flush with each other, and the suspension bolt 40 and the protrusion Each tip of the raising pin 42 is connected to the punch plate 36.
It is arranged so that it is almost flush with the top surface without protruding from it. A squeeze punch like this 2
0, punch plate 36, pad 38, suspension bolt 40, and push-up pin 42 are combined into one set to form a replacement unit.

Further, the drawing die 16 is connected to a die plate 44.
A pad 46 having a shape corresponding to the shape of the die hole is built into the drawing die 16 so as to be movable in the vertical direction, and is supported from below by a plurality of cushion pins 48. Normally, the upper surface of the pad 46 and the upper end surface of the drawing die 16 are substantially flush with each other. These drawing die 16, pad 46, and cushion pin 48 constitute one unit for replacement.

The above is a description of the replacement mold components, and next, the configurations of the fixed mold holder 8 and the movable mold holder 10 on the press device side will be described.

As is clear from FIGS. 2 and 3, a pair of hook-shaped holding fittings 50 for holding the punch plate 22 are attached to the portion of the fixed holder 8 to which the punch 14 is attached. A die plate 4 is fixed in parallel, and a die plate 4 is also attached to the portion where the drawing die 16 is attached.
A set of holding fittings 52 for holding 4 is fixed. Three bottomed spring holes 54 are provided on both sides of the pair of holding fittings 50 along the longitudinal direction of the holding fittings 50. Lifter guide pins 56 with heads are screwed into the center of the bottoms of these spring holes 54, and ring-shaped spring receivers 58 are slidably attached to these lifter guide pins 56. The head of pin 56 defines the end of upward movement. A spring 60 is disposed between the spring receiver 58 and the bottom of the spring hole 54 in a precompressed state. As is clear from FIG. 5, the spring 60 and lifter guide pin 56 are provided at positions corresponding to both sides of the lifter plate 24, and the spring 60 serves to urge the lifter plate 24 upward. On the other hand, the lifter guide pin 56 plays the role of defining the upward movement end of the lifter plate 24.

On the other hand, as shown in FIG.
A pair of hook-shaped holding fittings 62 for holding the die plate 26 are fixed in parallel to each other at the portion where the punching die 18 is attached.
A similar set of holding metal fittings 64 for holding the punch plate 36 is also fixed to the adjacent portion where the drawing punch 20 is attached. The movable holder 10 has a holder main body 66
and a bucking plate 68 fixed to its top surface.
A spring hole 70 is formed from the upper surface of the holder body 66 in a portion of the holder body 66 to which the punching die 18 and the like are attached;
A pin hole 72 having a smaller diameter is formed concentrically with the spring hole 70 so as to open on the lower surface of the holder main body 66. Although only one spring hole 70 and pin hole 72 are shown in FIGS. 2 and 3, in reality, as is clear from FIG. has been done.

As shown in FIG. 2, headed pins 74 are inserted into these pin holes 72, and a spring 76 is disposed in a pre-compressed state in the spring hole 70, and both ends of the spring 76 are disposed in a pre-compressed state. is received by the bucking plate 68 and the head of the punching pin 74, and constantly urges the punching pin 74 downward. The limit of downward movement of the locking pin 74 is defined by a stepped surface formed at the boundary between the spring hole 70 and the pin hole 72, and in this state, the locking pin 74 does not protrude from the lower surface of the holder main body 66. The length dimension is determined so that it is almost flush with that.

Further, a plurality of spring holes 78 are formed from the upper surface of the holder main body 66 at the portion where the die unit such as the drawing punch 20 is attached, and a pin hole 80 having a smaller diameter is formed next to the spring holes 78. It is formed concentrically so as to open on the lower surface of the holder main body 66. As is clear from FIG. 4, a large number of these spring holes 78 and pin holes 80 are provided in the range corresponding to the punch plate 36, and a headed locking pin 82 is slidably inserted into the pin hole 80. is always urged downward by the pre-compressed spring 84, and the limit of its downward movement is defined by the stepped surface at the boundary between the spring hole 78 and the pin hole 80, and in this state, the hard pin The tip of the holder 82 does not protrude from the lower surface of the holder main body 66 and is substantially flush with the lower surface of the holder main body 66.

Further, a plurality of escape guide holes 86 are formed from the lower surface of the holder main body 66. As is clear from FIG. 4, these relief guide holes 86 are arranged alternately with the spring holes 78, in other words, a large number of relief guide holes 86 are provided in a staggered arrangement pattern. The suspension bolt 40 will be inserted into some of the objects.

On the other hand, below the group of escape guide holes 86 and locking pins 82, the fixed holder 8
As is clear from FIG. 2, a plurality of pin holes 88 are provided between the holding fittings 52 and 52 to hold the fixed holder 8 in the thickness direction. It is formed to penetrate through. As shown in FIG. 5, these pin holes 88 are arranged in large numbers in a range approximately corresponding to the width of the pad 46, and some of them allow the cushion pin 48 shown in FIG. In addition, the cushion plate 90 and cushion spring 92 on the bolster 6 side are connected via the cushion pin 48.
and the pad 46 described above.

The above-described punching and drawing die units are removably attached to the fixed holder 8 and the movable holder 10 as described above. For example, the punch 14 on the punching die side is
As shown in FIG. 3, it is fitted between a pair of holding fittings 50 in the punch plate 22, and the fitting limit is defined by each stopper 94 shown in FIG. As shown in FIG. 6, the fixed holder 8 is provided with a protruding pin 96 that is movable in the vertical direction for positioning with high precision. A rotation operation shaft 98 is provided in the direction of the rotation. The rotation operation shaft 98 can only be rotated by engagement between the annular groove 100 and the retaining pin 102, and an eccentric pin 104 is protruded from the tip surface at a position offset from the center line. It is engaged with the formed annular groove 106. The protruding pin 96 is attached to the fixed holder 8 when attaching and detaching the punch 14, punch plate 22, etc.
Although it is held at the lower limit position where it does not protrude from the upper surface, after installation, it is protruded by rotating the shaft 98 and is fitted into a positioning hole (not shown) formed in the punch plate 22 to perform a positioning action. .

Further, in order to fix the punch plate 22 and the like to the fixed holder 8 after such positioning, a set of clamping tools 108 shown in FIG. 5 are provided. These clamp tools 108 are the seventh
As shown in the figure, it is rotatably supported by a fixed support shaft 110, and its tip can come into contact with the punch plate 22, while the support shaft 11
The camshaft 112 is brought into contact with the end on the opposite side of the punch plate 22.
When the clamp tool 108 is attached and detached, the clamp tool 108 is in the clamp release position shown by the two-dot chain line, but when it is fixed, the punch plate 22 is pressed against the fixed holder 8 by lever action by rotating the camshaft 112 and clamped. It's getting old.

The punch 14 and punch plate 22 clamped in this manner are further provided with a third
As shown in the figure, the lifter plate 24 is assembled. Three guide holes 114 are provided on each side of the lifter plate 24, and the head of the lifter guide pin 56 is inserted into these guide holes 114. is accommodated, and the lifter plate 24
is supported by the spring support 58 in a seated state;
In the mold closed state shown in FIG.
4 compresses the spring 60 via the spring receiver 58. Here, even if the punch 14, lifter plate 24, etc. shown in FIG. Lifter guide pin 5
6 and spring 60 can be used in common.

On the other hand, the die plate 2 of the remaining punching die 18
6, the punch plate 36 of the drawing punch 20, and the die plate 44 of the drawing die 16 are also fitted into the holding fittings 62, 64, and 52, respectively, and positioned and clamped in the same manner as described above.

When the die unit of the punching die 18 is fixed to the movable die holder 10, the plurality of push-up pins 3
4 is in a state where it can just come into contact with any one of the many locking pins 74 provided on the movable holder 10. When the stripper plate 28 is pushed up in the mold-closed state shown in FIG. pushed up against the forces, and as a result,
The biasing force of the spring 76 is applied to the stripper plate 28 via the pusher pin 74 and the push-up pin 34.
This will force the force downward.
Here, even if the punching die 18, the stripper plate 28, etc. are replaced with another one having a different shape or size, each of the plurality of push-up pins 34 incorporated in the replaced mold unit It is designed so that it can be brought into engagement with another one of the locking pins 74 shown in the figure. In other words,
The position of the push-up pin 34 on the side of the replacement die unit is determined in this way, and therefore even if the punching shape and dimensions change, the push-up pin 74 on the side of the movable die holder 10, etc. can be used in common. .

Furthermore, when the mold unit including the drawing punch 20 and pad 38 is fixed to the movable mold holder 10 as shown in FIG.
The push-up pins 42 erected alternately with 0 are in a state where they can come into contact with some of the locking pins 82 on the movable holder 10 side, and each of the suspension bolts 40 is also on the movable holder 10 side. It becomes possible to fit into a part of the formed escape guide hole 86. Then, when the pad 38 is pushed up as shown in FIG. 42, and the suspension bolt 40
fits into the relief guide hole 86. Even when this mold unit is replaced with one of a different size or shape, each of the push-up pins 42 and suspension bolts 40 on the side of the replacement mold unit must be connected to a large number of tightening pins 82 and relief guide holes 86 shown in FIG. The positional relationship is determined so as to correspond exactly to a part of the mold, and the locking pin 82 and the like can be used in common regardless of the mold exchange.

Furthermore, regarding the mold unit including the drawing die 16 in FIG. 3, after it is fixed to the fixed mold holder 8, a plurality of cushion pins 48 are slidably passed through the die plate 44 and attached to the fixed mold holder. These cushion pins 48 are inserted into corresponding ones of the numerous pin holes 88 formed in the
supports the pad 46, and the pad 4
6 is connected to a dictation device such as a cushion plate 90 or a cushion spring 92 on the press device side. This pad 46 positions and holds the workpiece in a state where the cushion spring 92 is compressed via the cushion pin 48 etc. during the pressing process shown in FIG. It is pushed up like this and also serves as a knockout.

As is clear from the above description, in this example, the knockout mechanism is constructed with the stripper plate 28 and the pad 38 as main bodies, respectively, and as secondary means for the punching die 18 and the drawing punch 20. Among the plurality of sub-elements constituting the knock-out mechanism, there are sub-elements that can be used in common regardless of the shape and dimensions of the pressed product to be processed, namely the knock-out pins 74 and 82.
, springs 76 and 84, relief guide hole 86, etc. are the first subsidiary elements permanently installed in the movable holder 10, and they need to be replaced together with the die 18 and punch 20 according to changes in the form of the pressed product. a minimal sub-element, namely a stripper plate 28;
Pads 38, push-up pins 34, 42, suspension bolts 40, etc. are second subsidiary elements that are assembled on the side of the die unit being replaced. The stripper plate 28 and pad 38 correspond to pressing members, the locking pins 74 and 82 correspond to engagement pins, and the push-up pins 34 and 42 correspond to push-in pins. Also,
A pin hole 72 in which the locking pins 74 and 82 are arranged,
The lower surface of the holder main body 66 to which the die plate 26 and the punch plate 36 are fixed corresponds to a tool mounting surface.

Note that the knockout mechanism of the punch 14, which is mainly composed of the lifter plate 24, and the drawing die 16, which is mainly composed of the pad 46,
Regarding the dictation mechanism, the spring 6
0, common parts such as the cushion spring 92 are arranged on the fixed holder 8 side, and the lifter plate 2
4. Only dedicated parts such as the pad 46 are assembled to the punch 14 and die 16 for use.

Therefore, when replacing the mold, there is no need to replace the entire mold set including the knock-out mechanism and dictation mechanism, and the replacement mold unit has fewer parts than before, making it smaller and lighter. As a result, mold replacement work becomes easier, and space for storing replacement mold units can also be saved.

Further, the knockout mechanism of the punching die 18 and the drawing punch 20 has a large number of pin holes 72 and 80 formed in the holder main body 66, and locking pins 74 and 82 are disposed in each of the pin holes 72 and 80, respectively. The stripper plate 28 and pad 38 are biased independently by springs 76 and 84, while the stripper plate 28 and pad 38
4, 42 to the above-mentioned large number of pins 74, 8.
2 into the pin holes 72, 80, the biasing force of the springs 76, 84 is applied to those stripper plates 28, pads 38. A biasing force corresponding to the number of push-up pins 34, 42 is applied.

Returning to FIG. 1, the main body 2 of the press processing device
A coil cradle 118 is installed in front of the center shaft 116 to rotatably hold a band-shaped coil material C wound around the central shaft 116. Further, the main body 2 is provided with a gripper feed device 120 as a supply means for drawing out the coil material C and intermittently feeding it to a press working position by the punch 14 and the punch die 18.

This gripper feeding device 120 includes a fixed gripper block 122 that is integrated with the main body 2. Two guide bars 124 extend from the fixed gripper block 122, and the movable gripper block 12 is guided by these guide bars 124.
6 is supported movably in the longitudinal direction of the coil material C. An end plate 128 is fixed to the tips of the two guide bars 124, and an air cylinder 130 is fixed to this end plate 128, and its piston rod 132 is connected to a movable gripper block 126.
It is designed to move back and forth. The movable gripper block 126 and the fixed gripper block 122 each have a gripper plate 1 which alternately clamps the coil material C between each block by a clamp cylinder (not shown).
34 and 136 are provided, respectively. That is, when the movable gripper block 126 is advanced from the coil cradle 118 side to the punching die side, the gripper plate 134 is in a clamped state and the gripper plate 136 is in an unclamped state to feed the coil material C by a predetermined stroke, while the movable gripper block 126 remains in its original position. When the gripper plate 134 is returned to the unclamped state and the gripper plate 136 is returned to the clamped state, the coil material C is fixed at the punching position.

Note that uncoiler rolls 138 and 14 are connected to the end plate 128 via a pair of brackets.
0 are provided respectively, and these serve to correct the curling tendency of the coil material C. Furthermore, a pair of coil guides 142 is installed between the gripper feeding device 120 and the punching die, and the coil material C is inserted into guide grooves 144 formed in each of these to face each other. This guides the feed. The screw shaft 1 straddles these pair of coil guides 142.
46 are screwed together, and by rotating this threaded shaft 146 via a handle 148, the interval between both coil guides 142 can be changed according to the width dimension of the coil material C.

Furthermore, this press processing apparatus is provided with a transfer unit 150. This transfer unit 15
0 is a press product that is drawn and formed at the drawing position at the same time as the blank punched by the punch 14 and the punching die 18 is transferred to an adjacent drawing position in a direction perpendicular to the supply direction of the coil material C. It serves as a transfer means for discharging the material out of the mold, and is provided with a movable bar 152 extending in the horizontal direction. This movable bar 152 has a unit main body 154 at its base end.
The movable bar 1 is held by driving members 156, 158, etc. provided on the movable bar 1, and is driven by connecting the driving members 156, 158, etc. to appropriate actuators such as cylinders and motors.
52 can be moved up and down, left and right, and front and back. Two support bars 160 and 162 are protruded from the tip side of the movable bar 152 with a distance corresponding to the distance between the punching die and the drawing die. is provided with suction cups 164 and 166. These suction cups 164 and 166 are connected to a negative pressure source (not shown), and have an adsorption effect due to the negative pressure.

During press processing using a punching die and a drawing die, the movable bar 152 is placed on standby between the two press dies at a position where the support bar 160, suction cup 164, etc. do not interfere with them. As shown in Fig. 9, it is moved from the standby position O to the punch 14 through a path of ~, where the blank to be punched is adsorbed by negative pressure, and then moved onto the drawing die 16 through a path of ~. After releasing the blank, it returns to the original standby position via the trajectory of ~. At this time, one of the suction cups 166 is also moved along a similar trajectory to attract and hold the pressed product to be drawn from the blank and discharge it out of the mold, and these operations are performed at the same time. It will become.

Note that the coil material C after being punched out with the punching die, that is, the scrap, will be processed by cutting or winding, and for this purpose, a scrap cutter or scrap winding device, etc., is installed (not shown). It is being

In the above-described press processing apparatus, the press die units corresponding to the desired punching shape and drawing shape are respectively set in the fixed holder 8 and the movable holder 10 as described above, and the coil is placed in the cradle 118. The material C is set and the coiled material C is intermittently fed to the punching die by the gripper feeding device 120. As shown in FIG. 8, as the movable holder 10 descends, the blank B is punched out from the coil material C by the punch 14 and the punching die 18, while the blank transferred to the drawing die side is A drawing process is performed using a drawing die 16 and a drawing punch 20, and a pressed product P as shown in FIG. 10, for example, is obtained. In this embodiment, the coil material C and the blank B are used as the stripper plate 28 and the pad 3 as the pressing members during press working.
8 corresponds to the workpiece that is brought into contact.

After that, as shown in FIG. 3, the movable holder 10
When the coil material C (scrap) is lifted up, the lifter plate 24 removes the punched coil material C (scrap) from the punch 14, and the stripper plate 28 discharges the punched blank B from the punching die 18. On the other hand, the pressed product P formed on the drawing die side
is released from the mold by pads 38 and 46. In addition, when the press product has a flange as described above, the pad 46 is attached to the die plate 4 during press molding when the mold is closed.
The punch 20 is locked at the lower limit position on the 4 side by a locking device (not shown), and in the mold opening process, the punch 20 is first
is raised, and the pressed product P is ejected from the punch 20 by the pad 38. Thereafter, the lock of the pad 46 is released, and as the pad 46 rises, the pressed product P is finally ejected from the die 16. The Rukoto.

Thereafter, the transfer unit 150 transfers the blank B obtained with the punching die as described above to the drawing die side, and at the same time discharges the pressed product P obtained with the drawing die out of the die. Thereafter, by repeating the same cycle, press products P are obtained one after another.

In this way, press processing that has undergone the blanking (blanking) process and drawing (bending) process can be performed as described above, without using the conventional progressive die with a complicated structure and difficult to adjust feed accuracy and positioning accuracy. Since it can be carried out using two single-shot types, the equipment becomes simpler and its cost can be reduced. In addition, changes in the press working format can be easily handled by replacing the compact and lightweight replacement unit as mentioned above, and even though the press process is not a progressive type like the conventional one, the coil material C can be processed in the primary process. Since it can be used as a raw material, there is no need to stack and stock pre-punched blanks, improving work efficiency.

In addition, as a supply means for intermittently feeding the coil material C, instead of the gripper feeding device 120, the coil material C may be fed by sandwiching it between a pair of push rolls, or by feeding the coil material C between a pair of pull rolls. It is also possible to use a roll feeding device that pulls and feeds the material while pinching it.

Further, in the above embodiment, the movable bar 152 holding the suction cups 164, 166 was moved left and right, up and down, and back and forth as shown in FIG. It only needs to be movable left and right and up and down.
In the figure, the trajectory indicated by can be omitted. Further, as such a transfer means, an electromagnet may be provided in place of the suction cups 164 and 166 for negative pressure adsorption, and the blank or pressed product may be attracted by excitation of the electromagnet and released by demagnetization. It is also possible to use other transfer means equipped with a chuck mechanism.

On the other hand, regarding the press mold side, the spring holes 78, pin holes 80, and relief guide holes 86 on the drawing mold side of the movable mold holder 10 in FIG. 4 are formed in various patterns other than being alternately formed. In addition, in the case of a press machine exclusively used for processing in which the movement stroke of the pad 38 is small, it is also possible to omit the guide hole 86 and the suspension bolt 40. In that case, the push-up pin 42 may have a head so that it also functions as a suspension bolt.

Additionally, as a method for clamping the punch plate and die plate, in addition to those shown in Fig. 7, it is also possible to employ, for example, a clamping means that grips hydraulically or a clamping means that hydraulically drives a wedge member. be.

In addition, in the above embodiments, the object is a pressed product that is completed by only punching and drawing, but the present invention is applicable to other products, for example, a press product that is completed by punching and drawing at the same time, and then drawing or bending is performed. It can also be applied to equipment for completed press products, and it can also be applied to products that require three or more steps. In that case, the necessary number of press molds may be arranged in parallel, and the transfer means such as the transfer unit 150 may be modified accordingly.

Furthermore, the present invention is not limited to the type in which a pressed product is completed step by step through several processes using the gripper feeder 120, the transfer unit 150, etc., but can also be applied to a single set of press products, such as punching and punching. , bending, drawing, parting, etc. can be similarly applied to various single-shot types, and even in that case, some of the multiple sub-elements of the sub-means may be combined with a fixed holder or a movable holder. By permanently installing it on a holding member such as No. 10, it is possible to enjoy the effect that the structure of the replaceable type is simplified.

Although not illustrated one by one, it goes without saying that there are various other embodiments in which various changes, improvements, combinations, etc. are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an overview of a press working device that is an embodiment of the present invention, and Fig. 2 is a simplified diagram showing a state in which a replacement press die (mold unit) is not installed in the press working device. FIG. FIG. 3 is a sectional view similar to that shown in FIG. 2, showing a replacement mold unit installed. 4 is a partially cutaway plan view of the movable holder shown in FIG. 2, and FIG. 5 is a plan view of the fixed holder shown in FIG. 2. FIG. 6 is a simplified cross-sectional view of an example of a positioning device for a replaceable unit, and FIG. 7 is a similar cross-sectional view of an example of a clamping device for a replaceable unit.
FIG. 8 is a sectional view showing the mold shown in FIG. 3 in a closed state, FIG. 9 is an explanatory view showing the movement of the transfer unit shown in FIG. 1, and FIG. 10 is an example of the pressed product obtained. FIG. {8: Fixed holder, 10: Movable holder}
(holding member), {14: punching punch, 16: drawing die, 18: punching die, 20: drawing punch} (press tool), 28: stripper plate (pressing member), 34, 42: push-up pin ( push pin), 38: pad (pressing member), 40: suspension bolt, 72, 80: pin hole, 74, 82: locking pin (engaging pin), 76, 84: spring, 8
6: Relief guide hole, C: Coil material (work),
B: blank (work), P: pressed product.

Claims (1)

[Scope of Claims] 1. A device comprising a pair of holding members that can be approached and separated from each other and a plurality of types of press tools having mutually different shapes and dimensions, and any one of the plurality of types of press tools can be used as the holding member. In an apparatus for performing predetermined press working by being removably fixed to Each of the pin holes includes a number of engagement pins that are arranged to be pushable into the pin holes, and a number of springs that bias the engagement pins in a direction in which the engagement pins are each independently protruded from the tool mounting surface, a first subsidiary element that is provided on the holding member and can be commonly used regardless of the type of the press tool; a pressing member that is brought into contact with the workpiece during the press working; and a pressing member that is brought into contact with the workpiece. a push pin that pushes some of the plurality of engagement pins into the pin holes and causes the biasing force of the spring to act on the pressing member through the engagement pins; A second press tool used in combination with the press tool for each type of press tool.
A press processing device characterized by comprising a sub-element of.