JP3318033B2 - Punching machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching machine.

[0002]

2. Description of the Related Art Heretofore, punching and forming have been performed by a punching machine, and a punch guide (plate pressing member) for holding a work during punching or forming has been provided. The plate holding member generally presses the work using, for example, the urging force of a spring. In some cases, the plate holding member is driven by hydraulic pressure to hold the work.

[0003]

However, the above-described conventional plate pressing means of a punching machine has a problem that the plate pressing force is insufficient at the time of forming in the method of pressing a work by the biasing force of a spring. In addition, when the pressing force is increased, the shape of the spring is increased, the space is increased, and the spring becomes expensive.

Further, in the system driven by hydraulic pressure, there is no problem that the plate pressing force is increased during the forming process, but there is a problem that the hit rate is reduced due to an increase in the amount of oil during the punching process.

[0005]

According to the first aspect of the present invention, a punch working head having a detachable punch die and a die working head having a detachable die are provided to face each other. In the punching machine, the punching die includes a pressing sleeve movably provided in the Y-axis direction on the punching head, a punch guide provided movably in the Y-axis direction on the pressing sleeve, A punch provided movably in the Y-axis direction on a punch guide, a stripper spring provided between the head of the punch and the punch guide, and a ram for pressing the punch is provided on the punching head. A presser piston for pressing the presser sleeve by the action of a pressure fluid is provided on an outer peripheral portion of the ram.

According to a second aspect of the present invention, there is provided a punching machine comprising a punching head having a detachable punch die and a die processing head having a detachable die opposed to each other. A punch die holding member is rotatably provided on the punching head, and a plurality of punch dies are provided on the punch die holding member. The punch die is moved in the Y-axis direction on the punch die holding member. A presser sleeve movably provided, a punch guide movably provided in the Y-axis direction on the presser sleeve, a punch movably provided in the punch guide in the Y-axis direction, A stripper spring provided between the punch guides, a ram for pressing a punch in a predetermined punch die is provided on the punching head, and an upper portion is provided on an outer peripheral portion of the ram. A presser piston for pressing the presser sleeve by the action of a pressurized fluid is provided, and a predetermined punch die can be positioned at a position facing the ram by rotation of the punch die holding member. .

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. The punching machine embodying the present invention is applied to a vertical punching machine that holds a work in a vertical state and performs punching, and a punching machine that holds a work in a horizontal state and performs punching.

First, the overall configuration of a vertical punching machine will be described.

Referring to FIG. 6, a vertical punching machine 1 is provided with a rectangular base 3, and a portal frame 5 is located slightly to the right of the center in the X-axis direction (the left-right direction in FIG. 6). It is erected. This portal frame 5
Is composed of a lower frame 5D, side frames 5R and 5L erected on the left and right sides of the lower frame 5D, and an upper frame 5U provided above the side frames 5R and 5L.

A C-shaped front frame 7F is provided on the base 3 on the front side of the upper and lower frames 5U and 5D of the gate-shaped frame 5, and a base on the rear side of the upper and lower frames 5U and 5D. 3 is provided with a C-shaped rear frame 7B. A plurality of parallel guide rails 9 are provided on the right side surfaces (the front surface in FIG. 6) of the front and rear frames 7F and 7B so as to extend in the X-axis direction.

The guide rail 9 is provided with a plate material transfer device 13 provided with a plurality of parallel rods 11 so as to be able to approach and separate from each other.
The left and right carriages 13L and 13
R is provided movably in the X-axis direction. This left,
The right carriages 13L and 13R are moved between the gaps 5G formed in the side frames 5L and 5R of the portal frame 5 along the X-axis direction by, for example, a drive motor, a ball screw, and the like, and are moved toward and away from each other. It is something that has become. A plurality of work clamps 1 are provided above and below the left and right carriages 13L, 13R.
The work W is held in the vertical direction by the work clamp 15.

Punching heads 17 and die working heads 19 are mounted on side frames 5R and 5L of the gate-shaped frame 5 by vertical drive motors 21 and 23 mounted on the upper frame 5U in the Y-axis direction (vertical direction in FIG. ). The upper frame 5U is provided with a drive motor 25 for rotationally indexing and positioning the punch P and the die D.

A tool magazine 27 in which a plurality of punches P and dies D are stocked is provided on the front side of the rear frame 7B in FIG.
A changer 29 for automatically exchanging the punches P and the dies D is provided on the left side of the gate frame 5, that is, on the side frame 5R side. Moreover, in the tool magazine 27, two chains (not shown) driven in parallel by the drive motors 31, a number of hooks provided on the chains, a punch P attached to the hooks, A die D is provided.

With the above configuration, the punch P and the die D to be exchanged from the punch P and the die D stored in the tool magazine 27 are exchanged into the tool magazine 27 via the changer 29.

Next, the punching head 17 having a punching die, which is a main part of this embodiment, will be described in more detail. Since the die processing head 19 provided with the die for a die is constituted by the same member, illustration and description are omitted.

Referring to FIGS. 1 and 2, the punching head 17 is provided on the portal frame 5 via a traveling LM guide 33 so as to be movable in the vertical direction (Y-axis direction). Ram carrier 1 which is the main body of punching head 17
7A is integrally provided with a pressure receiving portion 35 that comes into contact with the portal frame 5 and a bracket 37, and a cylinder 39 that is operated by fluid pressure is provided on the bracket 37. A ram 43 is provided in connection with the piston rod 41 of the cylinder 39.
Is movably inserted into a ram guide 17B provided integrally with the ram carrier 17A.

An index and plate holding cylinder 45 is mounted inside the ram carrier 17A, and an index and plate holding piston 47 is movably provided inside the index and plate holding cylinder 45. A lid 49 is integrally provided at one end of the index and plate holding piston 47, and a tooth portion 51 is formed at the other end. Further, although not shown, a pipe 53 for supplying and discharging the pressurized fluid from the fluid pressure generation source to the index and plate holding cylinder 45 is connected to the ram carrier 17A,
From the flow path 55A to the oil chamber 57A, from the flow path 55B to the oil chamber 57
It communicates with B. Reference numerals 59, 61, and 63 denote sealing packings for preventing oil leakage.

A spline groove 65 is formed on the outer periphery of the tip of the index and plate holding piston 47, and an index gear 69 having spline teeth 67 meshing with the spline groove 65 is used for the index and plate holding cylinder 4.
5 is integrally provided by a fastening member. And
Worm teeth 71 are engraved on the outer periphery of the index gear 69, and a worm 73 meshing with the worm teeth 71 is provided.
Is supported by the ram carrier 17A, and the worm 73
Is rotated by a spline shaft 75 penetrating through the inside.

With the above configuration, when the spline shaft 75 is rotated by a drive motor (not shown) to rotate the worm 73, the index gear 69 meshed with the worm 73 rotates, and the spline teeth 67 rotate the index gear 69 through the spline groove 65. The dual plate presser piston 47 rotates. Further, the pressure fluid is supplied to the oil chambers 57A or 57B formed in the index / plate holding cylinder 45 through the flow paths 55A and 55B.
The index and plate presser piston 47 is protruded and retracted by the further supply.

On the other hand, the punching die 77 has a known structure and a detailed description is omitted. A punch guide 79 having a punch P therein is mounted on holding sleeves 83A and 83B via a lifter spring 81. The pressing sleeves 83A and 83B are mounted on the mold holders 87A and 87B via the holder spring 85. The mold holders 87A and 87B are mounted on the head main body 89,
The head main body 89 has a shaft 91 as shown in FIG.
Are rotatably provided via a bearing 93 mounted on a turning shaft portion 89A of the head main body 89. The shaft 91 is a ram carrier 17A which is a punching head 17.
Are integrally fixed by a fastening member. A stripper spring 95 is interposed between the punch head PT of the punch P and the punch guide 79.

Further, on one end (on the index / plate pressing piston 47 side) of each of the pressing sleeves 83A and 83B, a tooth portion 51 engraved on the index / plate pressing piston 47 is provided.
Is provided with a tooth portion 97 which can be engaged and disengaged. The difference between the holding sleeves 83A and 83B is that the holding sleeves 83A and 83B are selected and mounted according to the purpose of use. The holding sleeves 83A for punching are formed by changing the distance L1 of the contact surface 99 that contacts the mold holder 87A. Is L2> L1 or L2 with respect to the distance L2 between the punch P and the die D.
1 = 0, press sleeve 83B for forming
Are L2 <L1.

That is, at the time of molding, the work W can be pressed and fixed at the tip of the pressing sleeve 83B.

Further, an index brake 101 is provided on the head body 89 side as a rotation stopper of the mold holders 87A and 87B. The index brake 101 is provided with a piston 105 inside a cylinder body 103 operated by fluid pressure. The tip of a piston rod 107 provided integrally with the piston 105 is connected to the mold holder 8.
It can be inserted into and removed from engagement holes 109 provided in 7A and 87B. Further, a mold holder shot pin 111 having a known configuration for positioning the head body 89 is provided on the ram carrier 17A, and the mold holder shot pin 1 is provided.
11 is provided in the engagement hole 1 provided in the head main body 89.
15 can be freely inserted and removed.

A worm wheel 117 provided on a turning shaft portion 89A of the head main body 89 meshes with a worm shaft 121 connected to a rotating motor 119 provided on the ram carrier 17A, and is driven by the rotating motor 119 as shown in FIG. The head body 89 is, for example, 180
It can turn freely.

Reference numeral 123 denotes a running ball screw which is screwed into a nut member 125 mounted on the ram carrier 17A of the punching head 17, and which is driven by a vertical drive motor 21, not shown, to drive the punching head 17. It is movable in the Y-axis direction. Also, reference numeral 127
Is a die for die provided with the die D, and a line indicated by a line FF in the drawing is a pass line.

According to the structure described above, the operation is shown in FIGS. 2 to 5, FIGS. 2 and 3 show the operation at the time of punching, and FIGS. 4 and 5 show the operation at the time of forming. .

First, the operation at the time of punching will be described. FIG. 2 is a state diagram before processing, and FIG. 3 is a state diagram at the time of processing. Before processing, the pressing sleeve 83A is used for punching, that is, L1 dimension is L2> L1 or L2.
1 = 0 is mounted on the mold holder 87A, and is held at a predetermined position by a holder spring 85 provided on the mold holder 87A. Then, the mold holder 87A operates the index brake 101 to fix the piston rod 107 by engaging the piston rod 107 with the engaging hole 109 provided in the mold holder 87A. In a state where the punching die 77 is mounted in the holding sleeve 83A, FIG.
The head main body 89 is positioned in the state shown in FIG.

On the other hand, the flow path 5
The pressure fluid is supplied from 5A to the oil chamber 57A, and the index and plate holding piston 47 is kept in a reduced state. That is, the teeth 51 formed on the index and plate holding piston 47 and the teeth 97 formed on the holding sleeve 83A are separated from each other.

Next, at the time of punching, as shown in FIG. 3, the flow path is switched and a pressurized fluid is supplied from the flow path 55B to the oil chamber 57B. When the pressure fluid is supplied to the oil chamber 57B, the index and plate holding piston 47 protrudes, and the teeth 51 formed on the index and plate holding piston 47 mesh with the teeth 97 formed on the holding sleeve 83A.

In this state, the punch P can be positioned as needed. That is, although not shown, the driving motor 25 for indexing and positioning the punch P is driven to rotate the spline shaft 75. The rotation of the spline shaft 75 is transmitted to the worm 73, and when the index gear 69 meshed with the worm 73 rotates, a spline tooth 67 formed on the inner diameter side of the index gear 69,
Since the spline groove 65 formed in the index and plate holding piston 47 is engaged, the index and plate holding piston 47 is rotated, and the index and plate holding piston 47 is engaged with the holding sleeve 83A by the above-described operation. Therefore, the rotation is transmitted to the pressing sleeve 83A, and the punch P can be positioned at a desired position.

When the positioning of the punch P is completed, the index / plate holding piston 47 is further protruded, and the holding sleeve 83A abuts against the contact surface 99 of the mold holder 87A. In this state, the ram 43 is actuated, and the punch P and the die D cooperate to perform punching on the work W.
The work W is pressed by the punch guide 79,
The pressing sleeve 83A does not press the surface of the work W.

At the time of forming, referring to FIGS. 4 and 5, FIG. 4 is a state diagram before forming, and FIG. 5 is a state diagram during forming. Note that members different from the constituent members at the time of the punching described above are a pressing sleeve 83B which is a forming punch mold 128, a mold holder 87B, and a forming punch Ps.
Since the other members are the same, only the operation of the pressing sleeve 83B and the mold holder 87B, which are different members, will be mainly described.

Before processing (see FIG. 4), the presser sleeve 83
In the case of the molding process B, the dimension L1 is larger than the dimension L2, the die holder 87B does not have the contact surface 99 formed on the die holder 87A for punching, and the holding sleeve 83B is formed by the holder spring 85. Is held. The pressing sleeve 83B has the same diameter as the pressing sleeve 83A for punching described above.

At the time of molding, referring to FIG. 5, the flow path is switched to supply the pressure fluid from the flow path 55B to the oil chamber 57B. When the pressure fluid is supplied to the oil chamber 57B, the index and plate holding piston 47 is supplied. Are protruded, and the tooth portion 51 formed on the index and plate holding piston 47 and the holding sleeve 83B
And the toothed portion 97 formed at the same time meshes. Further, the index / plate holding piston 47 is protruded, and the pressing sleeve 83B is protruded from the mold holder 87B.
The work W is pressed by the front end surface of the work to fix the work W.
Then, the ram 43 is operated to form the workpiece W in cooperation with the forming punch Ps and the forming die Ds.

The index and plate presser piston 47
Can be changed by changing the pressure of the fluid pressure, so that the material of the work W can be variably applied to materials having different tensile strengths such as non-ferrous metals.

With the above-described configuration and operation, high-speed low-frequency sound processing can be performed at the time of punching processing, which is equivalent to the conventional processing. At the time of forming processing, a large-diameter die processing can be performed with high quality due to a large plate holding force. It can correspond to the material.

Next, a mold changing apparatus 129 which is a second main part of this embodiment will be described.

Referring again to FIG. 1, in contact with the ram carrier 17A, which is the punching head 17, a head main body 89 having a punching die 77 is provided with a shaft 91 as a fulcrum. By driving, for example, it rotates 180 degrees as in this embodiment. This rotation angle is not limited.

A position where the head main body 89 has turned 180 degrees,
That is, a sub-magazine 133 having a plurality of (two in this embodiment) mold holders 131 at a mold exchange position K1 indicated by a two-dot chain line in the drawing of FIG. It is provided so that it can turn freely. The first changer 29A is provided immediately above the mold replacement position K1 of the mold holder 131.

Since the structure of the first changer 29A employs a known structure, a detailed description is omitted. The first changer 29A is provided with a drive shaft 141 provided with a spiral groove 139 from a drive motor 135 via a rotation transmitting member 137, and provided with a piece 143 engaged with the spiral groove 139 provided on the drive shaft 141. A replacement shaft 145 is provided, and the tip of the replacement shaft 145 is
7 is mounted.

With the above configuration, when the drive motor 135 is driven, the drive shaft 141 is driven via the rotation transmitting member 137.
Rotates. The rotation of the drive shaft 141 causes the replacement shaft 145 having the piece 143 engaged with the spiral groove 139 to move back and forth, and the die gripping member 147 provided at the tip of the replacement shaft 145.
The punching die 7 taken out by the head main body 89 into the empty die holder 131 of the sub-magazine 133
7 is stored. Further, the punching punching die 77 can be mounted in the empty die holder 87A or 87B of the head main body 89 from the die holder 131 on which the next die is mounted.

A mold holder 27A provided in the tool magazine 27 is set just above the mold exchange position K2 on the other side of the sub-magazine 133, and a second changer 29B is provided just above this mold holder 27A. Have been. In addition,
The second changer 29B has exactly the same configuration as the above-described first changer 29A, and a description thereof will be omitted.

With the above configuration, the operation is as follows. In order to replace the used punching die 77, the engagement of the die holder shot pin 111 is released and the head body 8 is replaced.
9 is rotated 180 degrees and the used punching die 7
7 is positioned at the mold changing position K1. The empty mold holder 131 of the sub magazine 133 is moved to the mold exchange position K1.
Is already positioned, the first changer 27A is driven, and the used punching die 77 mounted on the head body 89 by the die gripping member 147 provided on the replacement shaft 145 is removed from the sub-magazine 133. Empty mold holder 1
Then, the sub magazine 133 is turned by 180 degrees and moved into the empty mold holder 27A of the tool magazine 27 by the second changer 29B to complete the replacement operation.

Next Step In order to mount the die on the punching head 17, the sub-magazine 13
In the third mold holder 131, a punching die 77 for punching or a molding die 129, which is the next process die, is a die replacement K.
1, the first changer 29A
The punching die 77 or the molding die 129 is housed in the head main body 89 from the sub-magazine 133 by the drive of Then, the head body 89 is turned by 180 degrees, and the punching die 77 or the forming die 129 is formed.
Is aligned with the axis of the punching head 17, the die holder shot pin 111 is operated to fix the head body 89, and punching or forming is performed.

Thus, the mold can be quickly replaced,
It is possible to replace heavy-weight large-diameter molds. Since the exchange of the die D has the same configuration, illustration and description are omitted.

FIG. 7 shows another embodiment of the mold change. That is, the constituent members different from those of the above-described embodiment are that the punching die 77 and the forming die 1 are provided on both sides of the pivotable die holding member 149.
28, the empty mold holder 27A of the tool magazine 27 is positioned at the mold exchange position K1, which is the standby position of the next process mold, and the mold is inserted into the mold holder 27A, Changer 2 for transferring a mold mounted on mold holder 27A to punch mold holding member 149
9 is provided. Although the sub-magazine 133 and the first changer 29A are provided in the above-described embodiment, this embodiment need not be provided. Other configurations and operations are completely the same as those of the first embodiment.

With the above configuration, the punching die 77 or the forming die 128 required for the next process from the tool magazine 27 is moved by the changer 29 to the die holder 87A or 87B on the standby side of the punch die holding member 149. It is mounted inside.

When the mold is replaced after the operation is completed, the punch can be replaced with a desired next process by rotating the punch holding member 149 by 180 degrees, and quick replacement is possible. This is to reduce equipment members.

The embodiment shown in FIG. 8 shows another embodiment. That is, the present embodiment is applied to a horizontal punching machine.

The press machine 201 has a work carriage slider (hereinafter simply referred to as a slider) 207 which is guided by a linear guide 205 provided on a frame 203 and extending in the X-axis direction and capable of reciprocating in the X-axis direction. Have.

The slider 207 is provided with a plurality of work clamps 209, and the work plate W is removably supported horizontally along the work path line by the clamps 209. The slider 207 is provided at the lower bottom. A rack (not shown) meshes with a pinion (not shown) interlocked to the X-axis motor 211 and is reciprocated in the X-axis direction.

A gate type frame 213 is attached to the frame 203 so as to straddle the frame 203 in the Y-axis direction. In the frame 203, a lower frame 215 is provided in which a portal frame 213 extends across the frame 203 in the Y-axis direction at the same position as the frame 203.

A punching head 217 is mounted on the portal frame 213 by a linear guide (not shown), and a die processing head 219 is mounted on the lower frame 215 by a linear guide (not shown) so as to reciprocate in the Y-axis direction. Have been.

The punch processing head 217 and the die processing head 219 are vertically aligned and opposed to each other with a work path line therebetween, and exchangeably support an upper mold 221 such as a punch.
The die processing head 219 is provided with a lower die 2 such as a die.
23 are exchangeably supported.

A Y-axis servomotor 225 is mounted on the portal frame 213. The Y-axis servo motor 225 is synchronously connected to an upper ball screw (not shown) and a lower ball screw (not shown) by a belt-type synchronous driving device 227, and the punching head 217 and the die processing head 2 are connected.
19 are driven reciprocally synchronously with each other in the Y-axis direction.

The upper die 221 of the punching head 217 and the lower die 223 of the die processing head 219 are rotatable about a vertical center axis, respectively. 229, each of them is indexed and driven to rotate, and the rotation posture is variably set.

The work table device 231 is provided with a large number of works subdivided in the direction orthogonal to the moving direction (X-axis direction) of the processing plate W by the slider 207, that is, in the Y-axis direction, and arranged in the frame 203. Support belt 23
The work support belt 233 is separated into a front side belt 233F and a rear side belt 233R, and each is independently provided.

Further, one side of the frame 203 is provided with a punch tool magazine 235A and a die tool magazine 235B, which are members of the die changing device 235, and is provided with a punch and die tool magazine. 2
In order to take out the mold from 35A and 235B and to store the used mold, a replacement member equivalent to that of the above-described first embodiment is provided. That is, a sub-magazine 237A for punches and a sub-magazine 237B for dies, a first tool changer 239 and a second tool changer 241 for inserting and removing a die into and from each magazine are provided, and the exchange means is the first embodiment. The description is omitted because it is exactly the same as the example.

The configuration of the punching head 217 and the die processing head 219 is also omitted from the drawing, but is completely the same as that of the first embodiment. Therefore, the effect is also the first
An effect equivalent to that of the embodiment can be exerted.

FIG. 9 shows a third embodiment. That is, this embodiment is another embodiment of the punching head 217 employed in the press machine 201 shown in FIG. 8 described above, and the same members are denoted by the same reference numerals and description thereof will be omitted.

First, referring to FIGS. 8 and 9, a portal frame 213 is provided at the center of the frame 203 in the X-axis direction, and the work W is gripped by the work clamp 209.
The work clamp 209 is a work carriage slider 20.
7 and the frame 203 by the X-axis motor 211.
The upper part is moved and positioned in the X-axis direction. A punching head 217, a die processing head 219, an upper die 221 as a punch, and a lower die 223 as a die are provided on the upper and lower frames 215 of the portal frame 213, respectively, in the Y-axis direction (the front-rear direction in FIG. 9 (in a direction perpendicular to the drawing in FIG. 9).

Next, the punching head 217 will be described in more detail with reference to FIG. Since the die processing head 219 has the same configuration as the punch processing head 217, the illustration and description are omitted.

The punching head 217 includes a ram cylinder 243 and a punching head main body 245. The ram cylinder 243 is connected to the portal frame 213 by LM.
A ram cylinder support member 249 is provided via a guide 247.
The ram cylinder support member 249 is supported by a ram cylinder drive motor via a ball screw 251, and is supported by the ram cylinder drive motor via a ball screw 251. The ram cylinder 243 is mounted on the ram cylinder support member 249. . A striker 255 is fixed to a tip of the ram 253 of the ram cylinder 243 by a fastening member such as a bolt.

A bush 257 is provided around the outer periphery of the ram 253.
The inner cylinder 261 which constitutes the plate holding cylinder 259 is mounted via the, and this inner cylinder 261 is fixed to the outer cylinder 263 with bolts or the like, and the outer cylinder 263 is fixed to the ram cylinder support 249. A plate holding piston 265 is mounted inside the inner cylinder 261 and the outer cylinder 263. Reference numeral 267 denotes an end plate.

On the other hand, the punching head main body 245
It is mounted on the portal frame 213 via the M guide 269, and is movable in the Y-axis direction. That is, although not shown, the Y-axis moving motor can be moved in the Y-axis direction via a ball screw 271, and a pressing sleeve housing 273 is rotatably supported inside the punching head main body 245 via a bearing 275. ing. A worm wheel 277 is mounted on the outer periphery of the holding sleeve housing 273, and the worm shaft 279 meshes with the worm wheel 277.

The worm shaft 279 is movable in the Y-axis direction along with the punching head body 245 along the spline shaft 281, and the spline shaft 281 is extended in the Y-axis direction along the portal frame 213, and the index motor 229 ( (See FIG. 8).

A presser sleeve 283 is mounted on the presser sleeve housing 273 via a key 285 to stop the rotation of the presser sleeve 283,
Since the flange 283 </ b> A provided at the upper end of 3 is mounted on the lifter spring 287 on the holding sleeve housing 273, the holding sleeve 283 can freely move up and down with respect to the holding sleeve housing 273. An upper mold 221 is mounted on the presser sleeve 283, but the upper mold 221 is a known one, and detailed illustration and description are omitted.

A rotation mechanism 289 is provided at the tip of the plate holding piston 265 mounted on the plate holding cylinder 259. More specifically, referring to FIGS. 10, 11 and 12, a rotating ring 291 is attached to the tip of a ring-shaped plate holding piston 265 with a slight gap. As the mounting means, a plurality of ring brackets 29 provided on the outer circumference of the plate holding piston 265 are provided in grooves 293 formed on the outer circumference of the rotating ring 291.
5 is inserted and held by a plate holding piston 265 on the rotating ring 291.

A plurality of (four in this embodiment) rollers 297 are in contact with the upper surface of the rotating ring 291, and the rollers 297
Is rotatably supported via a roller bracket 299.
For example, a disc spring or the like is mounted as a spring 303.
The roller bracket 299 is held in the notch 305 of the plate holding piston 265 by a bolt 307 with a slight gap S1 (see FIG. 11). In addition,
Reference numeral 309 denotes a spring seat.

With the above configuration, the roller 297 is normally in contact with the rotating ring 291 by the urging force of the elastic machine 303, so that the rotating ring 291 and the plate pressing piston 265 do not come into contact with each other and the gap S2 (see FIG. 11). Is maintained, so that the rotating ring 291 can freely rotate. Note that the roller 297 is a stepped portion 2 of the rotating ring 291.
Since it is provided along 91a, rotation is facilitated.

When pressure oil is supplied to the plate holding cylinder 259 and the plate holding piston 265 is made to protrude, the work W is pressed against the lower surface of the holding sleeve 283 by contacting with the holding sleeve 283 and further supplying the pressing oil. At this time,
In the elastic machine 303, since the rotation ring 291 and the plate holding piston 265 are slightly in contact with each other, the force can be transmitted over a large area. That is, punching or forming is performed in this state.

According to the configuration described above, the operation is as follows. First, the holding sleeve 2 supporting the upper mold 221 is operated.
The distance L1 (feed clearance) between the lower surface of the die 83 and the upper surface of the lower mold 223 is set larger than that of a normal turret punch press so that the work W can pass through even if the work W is formed upward.

At the time of punching, the plate holding piston 26
5 is lowered halfway by controlling the flow rate of the plate holding cylinder 259, the holding sleeve 283 also moves down with respect to the holding sleeve housing 273, and the distance between the holding sleeve 283 provided with the upper mold 221 and the lower mold 223 is reduced. (L2 dimension shown in FIG. 9).

In this state, the ram cylinder 243 is operated to move the upper mold 221 to perform punching. For this reason, the stroke becomes short and the number of hits becomes high. Also, the upper mold 221 is provided with a stripper plate as well as a punch of a normal turret punch press, so that the work W can be held down. Becomes

At the time of forming, the work holding piston 265 is lowered, and the work W is pressed by the holding sleeve 283.
At this time, since the plate holding piston 265 presses through the rotating ring 291, since the rotating ring 291 has a large diameter, the work W can be firmly held, and the forming process can be performed accurately and without distortion.

In both cases of punching and molding, when the indexing is performed, the pressing sleeve 283 provided with the upper die 221 and the rotating ring 291 are used.
Are in contact with each other, and the urging force of the ammunition 303 is superior to the lifter spring 287 that floats the presser sleeve 283. Therefore, the holding sleeve 283 can smoothly rotate on the roller 297 together with the rotating ring 291 and the plate holding piston 265 does not rotate, so that the upper mold 221 can be freely indexed, and the seal member provided on the plate holding piston 265 is worn. And so on. Further, since the structure is simplified, the length of the mold guide can be increased, and a conventional mold can be used.

The present invention is not limited to the embodiments described above, but can be embodied in other modes by making appropriate changes. For example, the mold can be equipped on a turret punch press.

[0078]

According to the first or second aspect of the present invention, at the time of punching, the workpiece can be pressed by the punch guide via the biasing force of the stripper spring to perform high-speed low-frequency sound processing. Since the work is pressed by the pressing sleeve via the plate pressing piston by the action of the pressure fluid, the plate pressing force is sufficiently large, and high-precision forming can be performed. Further, by adjusting the pressing force at the time of the forming process, it is possible to perform an appropriate forming process on a work of various materials.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional explanatory view showing a punching head and a mold changing apparatus, which are main parts of the present invention, taken along line II in FIG.

FIG. 2 is an enlarged view of a portion viewed in the direction of arrow II in FIG. 1 and is an explanatory diagram of an operation at the time of punching.

FIG. 3 is an explanatory diagram of an operation at the time of punching.

FIG. 4 is an operation explanatory view at the time of molding.

FIG. 5 is an operation explanatory view at the time of molding.

FIG. 6 is an explanatory perspective view showing an overall configuration of a vertical punching machine according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating a schematic configuration of a mold changing apparatus according to a second embodiment of the present invention.

FIG. 8 is a perspective explanatory view showing a second embodiment of the present invention and showing an overall configuration of a press machine.

FIG. 9 is a sectional view of a punching head showing a third embodiment of the present invention.

FIG. 10 is an enlarged sectional view taken along line XX in FIG. 9;

FIG. 11 is an enlarged sectional view taken along line XI-XI in FIG.

FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG.

[Explanation of symbols]

 1 vertical punching machine 17 punching head 19 die processing head

Claims (2)

(57) [Claims] 1. A punching machine comprising a punching head having a detachable punch die and a die processing head having a detachable die facing each other, wherein the punch die comprises the punching head. A pressing sleeve movably provided in the Y-axis direction; a punch guide movably provided in the Y-axis direction on the pressing sleeve;
A punch provided movably in the Y-axis direction on the punch guide, a stripper spring provided between the head of the punch and the punch guide, and a ram for pressing the punch on the punching head; A punching machine, characterized in that a pressurizing piston for pressing the presser sleeve by the action of a pressure fluid is provided on an outer peripheral portion of the ram. 2. A punching machine comprising a punching head having a detachable punch die and a die processing head having a detachable die opposed to each other, wherein the punching head has a punch die holding member. The punch die holding member is provided with a plurality of punch dies, and the punch die is provided with a pressing sleeve movably provided in the Y-axis direction on the punch die holding member. A punch guide provided on the holding sleeve so as to be movable in the Y-axis direction, a punch provided on the punch guide so as to be movable in the Y-axis direction, and a stripper spring provided between the head of the punch and the punch guide. A ram for pressing a punch in a predetermined punching die is provided on the punching head, and the presser sleeve is applied to the outer peripheral portion of the ram by a pressure fluid. Provided a pressing piston that more pressing, punching machine, characterized by comprising a predetermined punch tool by rotation of the punch holding member configured to be positioned at a position opposed to the ram.