KR200277129Y1 - punch press - Google Patents

Abstract

The present invention relates to a punch press machine, the object of which is to transfer the work table fixed to the X, Y axis, in order to enable high-speed and high-precision transfer by mounting the motor drive unit automatically controlled by the control unit to each transfer unit To provide a punch press.

Therefore, the configuration of the punch press is formed in front of the main frame, a punching unit consisting of a punching center and a die corresponding thereto, and a plurality of clamps for fixing the workpiece and mounted on a bed. An X-axis conveying part including a motor driving part for conveying the conveying table left and right on the bed; A Y-axis feeder including a motor driver for transporting the bed forward and backward on the main body frame; A control unit for controlling the motor driving unit is provided.

Therefore, the workpieces can be automatically and quickly transferred accurately, thereby reducing the worker's fatigue, improving work efficiency, enabling mass production with rapid work, and enabling high precision processing. Since two workers can operate several punch presses at the same time, labor costs can be reduced to reduce manufacturing costs.

Description

Punch press

The present invention relates to a punch press machine, and more specifically, in transferring the transfer table to which the work is to be fixed on the X and Y axes, each motor is equipped with a motor driving part which is automatically controlled by the control unit, thereby enabling high speed and high precision transfer. The present invention relates to a punch press machine capable of improving work efficiency and productivity.

In general, a punch press is a device for performing a punching operation for forming holes of various shapes in a material such as a steel plate or a bending operation for forming a bending surface, provided with a punching center and a die operated by hydraulic pressure. In performing the operation, the worker fixes the workpiece to the transfer table, and then transfers the transfer table on the X and Y axes to process the desired position. For this purpose, the transfer unit uses a combination of a transfer screw and a nut housing. This is provided.

However, in the related art, in order to transfer the transfer table on the X and Y axes, since the operator had to rotate the transfer screw by rotating the handle provided at each transfer unit manually by hand, the worker's fatigue was induced and work efficiency and Productivity is low, there is a problem that can not perform a high-precision processing, there is a problem that the increase in manufacturing costs due to the increase in labor costs is inevitable because the number of workers increases in proportion to the number of machines.

Accordingly, the present invention is devised to solve the conventional problems as described above, the purpose of which is to be controlled automatically by the control unit to each transfer unit in the transfer of the transfer table fixed to the workpiece in the X, Y axis The present invention provides a punch press machine equipped with a motor drive unit for high speed and high precision feed.

Another object of the present invention is to provide a punch press machine that can be quickly and easily coupled and separated in a one-touch manner in setting the punch in the punch clamping portion.

Another object of the present invention is to provide a punch press machine that provides a more firm holding force, and can be separated more quickly in fixing and separating the punch with a punch clamping portion.

Another object of the present invention is to provide a punch press that prevents the ram from rotating in the cylinder during the punching operation, so that the punch is always maintained at the set position.

Yet another object of the present invention is to provide a punch press that allows for quicker and simpler engagement and disengagement of the die in setting the die bed.

Still another object of the present invention is to provide a punch press machine for setting dies of various sizes in setting a die in a die bed.

Still another object of the present invention is to provide a punch press that allows the die to be easily set in position when the die is set in the die bed.

Another object of the present invention is to provide a punch press machine that can start the punching operation only when the die is completely fixed to the die bed, thereby preventing a safety accident due to the detachment of the die during the punching operation.

Another object of the present invention is to provide a punch press to protect the worker from debris that may occur during the punching operation, and to prevent such a safety accident in advance.

In order to achieve the above object, the present invention consists of a punching part composed of a punching center and a die corresponding thereto, and a plurality of clamps for fixing the workpiece, and a transfer table mounted on the bed. A punch press machine, comprising: an X-axis feeder including a motor driving portion for moving the transfer table left and right on the bed; A Y-axis feeder including a motor driving part for feeding the bed forward and backward on the main body frame; A control unit for controlling the motor driving unit is provided.

The X-axis transfer unit and the guide sphere provided on the lower side of the transfer table; A guide rail provided on an upper side of the bed to correspond to the guide sphere; And a motor driving part including a nut housing provided in the transfer table, a transfer screw coupled to the nut housing, and a servo motor mounted on the bed and controlled by the control unit to drive the transfer screw. do.

The Y-axis transfer portion and the guide bar provided on both sides of the main body frame; A transfer block formed integrally with the bed and provided to slide on the guide rod; And a motor driving unit comprising a transfer screw coupled to at least one of the transfer blocks, and a servo motor mounted on the main body frame and controlled by the control unit to drive the transfer screw.

The punching center may include a case, a cylinder mounted to the inside of the case, a ram embedded in the cylinder, a punch clamping portion mounted below the ram and set with a punch, and a punch set with the punch clamping portion. Characterized in that consists of.

At this time, the punch is formed with a locking groove on the outer peripheral surface of the upper side; The punch clamping portion includes a housing having a punch insertion hole formed at a central portion thereof, a housing having an accommodation space portion therein, and a holding portion configured to hold and release the punch inserted into the punch insertion hole by a button portion; The ram is characterized in that the punch head insertion portion is formed in the center of the lower side.

A first holder in which the holding part is coupled to the button part, the other side of which is elastically supported by an inner surface and a spring of the storage space part, and a locking jaw corresponding to one side of the locking groove of the punch as a center; A second holder provided to correspond to the first holder and having a locking step corresponding to the other side of the locking groove of the punch; It is provided as an upper side of the first, second holder, characterized in that consisting of a circular sliding disk formed with a projection coupled to the groove formed on the upper side of the first and second holder to the lower side.

In addition, the center of the ram and the sleeve; A push rod mounted inwardly of the sleeve and provided with a fixture at a protruding upper end, and having a push head protruding inward from the punch head inserting portion at a lower end thereof; An ejector comprising a spring provided to support the push head is installed between the sleeve and the push rod.

In addition, the outer surface of the ram is formed with a guide groove in the longitudinal direction, the inner surface of the cylinder is characterized in that the guide jaw corresponding to the guide groove is formed.

In addition, the die bed is provided with one side is open to the lower side of the die to be inserted and fixed, the guide frame in front of the main body frame; A clamping head portion provided between the guide frames, the both sides of the lower portion being hinged on the guide frame, and having a support for pressing the side of the die upward; A lever part provided at a lower side, both sides of which are hinged and fixed on the guide frame, and a lever part provided with a stopper between the main body frame; It is provided between the clamping head portion and the lever portion, the upper side is hinged to the lower side of the clamping head portion, characterized in that the die clamping portion consisting of a connector hinged to the upper side of the lever portion.

In addition, the support is composed of a wrench bolt, it characterized in that the screw coupled to the clamping head portion.

In addition, a groove portion is formed on the lower side of the die, it characterized in that a protrusion corresponding to the groove portion is formed above the die bed.

In addition, the sensing unit for detecting the position of the lever and outputs a signal to the control unit is characterized in that it is provided.

In addition, the punching center is characterized in that the safety cover is mounted to enable the lifting.

The punching center is characterized in that the sensing unit for detecting the rising of the safety cover, and outputs a signal to the control unit.

1 is a perspective view showing an embodiment of the present invention.

Figure 2a, b shows an operating state according to Figure 1,

2A is a plan view schematically showing the X-axis feeder.

2B is a plan schematic view showing a Y-axis feeder.

3a, b, c, d shows a punching center according to FIG.

3A is a perspective view of main parts.

3B is a sectional view of the main portion;

3C is a plan view along the line AA ′ in accordance with FIG. 3B;

Figure 3d is a use state showing the setting state of the punch.

4 is a perspective view illustrating main parts of the die clamping unit;

Figure 5a, b is showing the use state according to Figure 4,

5A is a longitudinal sectional view showing a state before clamping;

Fig. 5B is a longitudinal sectional view showing a state after clamping.

Figure 6 is a perspective view of the main portion showing another embodiment of the present invention.

※ Explanation of codes for main parts of drawing

10: main frame

20: punching part

21: Punching Center

210: case

220: cylinder 221: guide jaw

230: RAM

231: punch head insert 232: guide groove

240: punch clamping part

241 housing 241a: punch insertion hole

241b: storage space 242: holding part

242a: first holder 242b: second holder

242c: sliding disc 243: spring

244: groove 245: protrusion

246: locking step 247: button

250: punch 251: locking groove

260: ejector

261: sleeve 262: push rod

263: fixture 264: pushhead

265: spring

270: safety cover

271: detection table 272: detection unit

22: die 23: groove

30: die bed 31: guide projection

40: transfer table

41 clamp 42 fixed shaft

50: bed

60: X axis feeder

61: guide port 62: guide rail

63: motor drive unit

630: nut housing 631: transfer screw

632: servo motor

70: Y axis feeder

71: transfer block 72: guide rod

73: motor drive part

730: transfer screw 731: servo motor

80: control unit

90: die clamping part

91: guide frame 92: clamping head

920: support 93: lever

930: lever 931: stopper

94: connector 95: detector

100: workpiece

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention in detail as follows.

1 is a perspective view showing an embodiment of the present invention, Figures 2a, b is an operating state according to Figure 1, Figure 2a is a schematic plan view showing the X-axis transfer portion, Figure 2b is a Y-axis transfer portion Plane schematic shown.

As shown in the front of the main body frame 10, a punching portion 20 consisting of a punching center 21 mounted on the upper side, and a die 22 mounted corresponding to the lower side is provided, and the inside Is mounted on the bed 50, a conventional punch is provided with a transfer table 40, which is provided with a plurality of clamps 41 for fixing the workpiece 100 to be able to slide left and right on the fixed shaft 42 In the press, the X-axis transfer unit 60 including a motor driving unit 63 for transferring the transfer table 40 to the left and right on the bed 50 is provided, the bed 50 is the main frame ( 10, a Y-axis feeder 70 including a motor driver 73 for feeding back and forth is provided, and a controller 80 for controlling the motor drivers 63 and 73 is provided.

First, the X-axis transfer unit 60 will be described in detail, and the configuration thereof includes a guide tool 61 provided as a lower surface of the transfer table 40; An upper side of the bed 50, a guide rail 62 provided to correspond to the guide sphere 61; A nut housing 630 integrally provided at the rear of the transfer table 40, a transfer screw 632 coupled to the nut housing 630, and a side surface of the bed 50, the transfer screw ( It consists of the motor drive part 63 which consists of the servomotor 632 which drives the 632.

At this time, the guide sphere 61 and the guide rail 62 is applied to the LM guide commonly used in the linear motion guide mechanism that requires high-precision transfer, and the transfer screw 632 constituting the motor driving unit 63 and The ball screw method commonly used in the guide mechanism is applied to the nut housing 630. The servomotor 632 is commonly used in an NC machine tool, and a starting and rotating speed is increased according to a command pulse signal transmitted from the outside. A controlled DC servomotor is applied.

Therefore, as shown in FIG. 2A, the servomotor 632 automatically drives the transfer screw 632 according to a signal input from the controller 80, thereby moving the transfer table 40 left and right on the bed 50. It will be able to process the workpiece 100 to convey.

Next, the Y-axis transfer unit 70 is provided integrally on the lower side of the bed 50, and each of the transfer block 71 is provided so as to slide on the guide rods 72 provided on both sides of the main body frame 10 and ; A transfer screw 730 coupled to one side of the transfer block 71 and a servo motor 731 mounted on the main frame 10 and controlled by the controller 80 and driving the transfer screw 730. It consists of a motor drive part 73 which consists of a).

At this time, the transfer screw 730 and the transfer block 71 is applied to the ball screw method similar to the X-axis transfer unit described above, the servo motor 731 is applied to the DC servo motor.

Therefore, as shown in FIG. 2B, the servo motor 731 automatically drives the transfer screw 730 according to the signal input from the controller 80 so that the transfer block 71 is moved on the guide rod 72. By being transferred to the rear, the transfer table 40 is also moved forward and backward together to process the workpiece 100, and interlocked with the X-axis transfer unit in accordance with the program input to the control unit 80, and automatically High speed and high precision machining will be available.

3a, b, c and d show the punching center according to FIG. 1, FIG. 3a is a perspective view of the main part, FIG. 3b is a sectional view of the main part, and FIG. 3c is a plan view along the line AA ′ of FIG. 3b.

As shown, the overall configuration is a case 210, a cylinder 220 mounted to the inside of the case 210, a ram built in the cylinder 220 and reciprocating up and down by hydraulic pressure ( 230, a punch clamping part 240 mounted below the ram 230 and set with the punch 250, and a punch 250 set with the punch clamping part 240.

At this time, the punch 250 has a locking groove 251 inclined downward is formed on the outer peripheral surface of the upper side; The punch clamping part 240 is formed with a punch insertion hole 241a into which the punch 250 is inserted into the center, a housing 241 in which an accommodating space 241b is formed, and the accommodating space 241b. And a holding part 242 for fixing and releasing the punch 250 inserted into the punch insertion hole 241a by a button part 247 protruding to the outside; The ram 230 is provided with a punch head inserting portion 231 into which the upper portion of the punch 250 is inserted into a lower center portion.

In addition, the holding portion 242 is coupled to the button portion 247 to one side, the other side is elastically supported by the inner surface and the spring 243 of the storage space portion 241b, the center of the punch 250 A first holder 242a having a locking step 246 corresponding to one side of the locking groove 251; A second holder 242b provided to correspond to the first holder 242a and having a locking jaw 246 corresponding to the other side of the locking groove 251 of the punch 250; The protrusions 245 are provided on the upper side of the first and second holders 242a and 242b and are coupled to the grooves 244 formed on the upper side of the first and second holders 242a and 242b. It is composed of a circular sliding disk 242c formed.

At this time, the button portion 247 is configured to be elastically supported by a spring, the sliding disk 242c is built in the lower side of the ram 230, the guide so that the first and second holders 242a and 242b interlock with each other. It plays a role.

Therefore, the operation relationship of the holding unit is as follows.

First, when the button portion 247 is pressed, the first holder 242a proceeds in the direction of the arrow, whereby the sliding disk 242c coupled to the upper side rotates in the direction of the arrow and simultaneously moves the second holder 242b. Proceed in the opposite direction to the first holder 242a, and when the pressure of the button portion 247 is released, the first and second holders 242a and 242b are returned to their original state by the elastic force of the spring 243. Done.

Meanwhile, the locking jaws 246 of the first and second holders 242a and 242b are formed to be inclined downward to correspond to the locking grooves 251 of the punch 250. The upper portion of the first and second holders 242a and 242b is fixed while being pushed to both sides without the need to pressurize the 247, so that a simple setting is possible.

In addition, an ejector 260 is mounted at the center of the ram 230, and the ejector 260 includes a sleeve 261; The push rod 262 is mounted to the inner side of the sleeve 261, and provided with a fastener 263 as a protruding upper end, and a push head 264 protruding into the punch head inserting portion 231 at the lower end thereof. )Wow; A spring 265 is provided between the sleeve 261 and the push rod 262 to support the push head 264.

Accordingly, in the process of setting the punch 250, the upper portion pushes up the push head 264 while rising to the inside of the punch head inserting portion 231, which will be described in detail later with reference to FIG. 3D. .

Fig. 3D is a use state diagram showing a punch setting state.

As shown, the punch 250 is fixed by the first and second holders 242a and 242b, and the push head 264 of the ejector 260 is punched by the elastic force of the spring 265. Since pressing the upper side of the, it is possible to provide a more firm fixing force by increasing the mutual adhesion.

On the other hand, the guide groove 232 is formed in the longitudinal direction on the outer surface of the ram 230, the guide jaw 221 corresponding to the guide groove 232 is formed on the inner surface of the cylinder 220, This is to prevent the ram 230 from rotating during the punching operation.

The reason for this is that when punching the workpiece into various shapes other than circular, the punch and the die are set to match the shape. If the ram rotates during punching, the center of the die This is because the shape of the penetrating portion and the punch formed in the inconsistent shape causes breakage of the punch and the die during the punching operation, the portion to be processed is not constant, and the worker is injured by the generated debris.

Therefore, the ram 230 is always up and down reciprocating motion in a constant direction, it is possible to prevent the problem as described above occurs.

On the other hand, when the punch 250 is to be separated, when the button portion 247 is pressed, the first and second holders 242a and 242b are operated from the catching grooves 251 of the punch 250 in the same manner as described above. After the separation, the push head 264 of the ejector 260 presses the punch 250 so that the punch 250 is automatically ejected and separated.

4 is a perspective view illustrating a main portion of the die clamping unit, and includes a die bed 30 having one side open to insert and fix the die 22 below the die 22, and die in front of the main frame 10. Clamping unit 90 is provided, the die clamping unit 90 and the guide frame (91); The clamping head is installed between the guide frame 91, both sides of the lower side is hinged on the guide frame 91, the clamping head is provided with a support 920 for pressing the side of the die 22 to the top Section 92; A lever 930 is provided at a lower side, and both sides of the lever 93 are hinged and fixed on the guide frame 91; The connector is provided between the clamping head 92 and the lever 93, the upper side is hinged to the lower side of the clamping head 92, the lower side is hinged to the upper side of the lever 93 ( 94).

In addition, a groove portion 23 is formed on a lower side of the die 22, and a guide protrusion 31 corresponding to the groove portion 23 is formed above the die bed 30, thereby forming the die 22. Always set to the right position, which is due to the same need as the reason to prevent the ram 230 to rotate during the punching operation in FIG. 3d described above, in the present invention the groove 23 and the guide protrusion ( 31) the in-situ setting of the die 22 is made simple.

In addition, below the guide frame 91, a sensing unit 95 for detecting a position of the lever 930 and outputting a signal to the controller 80 shown in FIG. 1 is provided, which will be described later with reference to FIG. 5A. It demonstrates in detail in b.

5A and 5B show a state of use according to FIG. 4, FIG. 5A is a longitudinal cross-sectional view showing a state before clamping, and FIG. 5B is a longitudinal cross-sectional view showing a state after clamping.

As shown in the figure, pushing down the lever 930, the connector 94 connected to one side of the lever 93 is raised in accordance with the link movement to push up the clamping head 92, accordingly the clamping head portion ( The support 920 provided at 92 is pressed against the side of the die 22 set on the die bed 30, thereby firmly fixing. On the contrary, when the lever 930 is lifted up, the fixing is released. (22) can be separated.

Therefore, the die can be fixed and detached simply by operating the lever.

On the other hand, when the support 920 is configured to helically couple the clamping head portion 92 with a wrench bolt, when the size of the die 22 is changed, by appropriately tightening and releasing it, dies of various sizes ( 22) can be set, it is possible to always firmly fix regardless of the size of the die (22).

In addition, the sensing unit 95 is provided at the lower side of the guide frame 91. As shown in FIG. 7B, when the lever 930 is pushed down to fix the die 22, the sensing unit 95 detects this. By the control unit 80 to maintain a state in which the punching center can work, and as shown in FIG. 7A when the lever 930 is out of position, the punching center controls to not work.

Therefore, the punching center can start work only when the die 22 is completely fixed to the die bed 30, so that the die 22 is released during the punching operation while the die 22 is incompletely fixed. It can be prevented.

In addition, the lever portion 93 is provided with a stopper 931 to one side, the stopper 931 is composed of a bolt and when the lever 930 is pushed down the main body so that the lever 930 does not proceed any more in the proper position It serves as a support between the frame (10). This is to prevent the situation in which the connector 94 pulls out the clamping head portion 92 if the lever 930 continues, so that the die 22 is released from the fixed state.

Figure 6 is a perspective view of the main portion showing another embodiment of the present invention.

As shown, the punching center 21 is mounted on the lower side of the safety cover 270 is capable of raising and lowering, the safety cover 270 is a transparent or semi-transparent synthetic resin material having a certain strength, the It is comprised so that lifting up and down on the punching center 21 is possible.

Therefore, when the punching operation is performed by lowering the safety cover 270, the worker can visually check the processing state of the workpiece, and can be safely protected from splinters scattered accidentally during the punching operation.

In addition, the punching center 21 is provided with a detection unit 272 for detecting the rise of the safety cover 270, and outputs a signal to the control unit 80 shown in Figure 1, which is the safety cover 270 is raised When the punching operation is carried out in the present state, as described above, the worker will be prevented from occurring a safety accident.

In this case, various types of sensors may be used for the sensing unit 272. In this embodiment, a limit switch of a contact type is used.

Therefore, in a state in which the safety cover 270 is normally raised, the detection stand 271 provided on one side of the safety cover 270 maintains the contact state with the detection unit 272, so that the control unit 80 If the punching center 21 does not start the work, and the safety cover 270 is lowered during the work, the contact of the sensing table 271 and the sensing unit 272 is released, so that the punching center 21 is opened. By allowing work to be started, the safety of the worker can be doubled.

As described above, the present invention is equipped with a motor driving unit which is automatically controlled by the control unit in transferring the machining table to which the workpiece is fixed to the X and Y axes, so that the workpiece can be automatically and quickly transferred accurately. It can reduce the fatigue, improve the work efficiency, enable mass production by rapid operation, and enable the high precision machining, and reduce the labor cost because one worker can operate several punch presses at the same time. It has the effect of reducing the manufacturing cost.

In addition, by providing a one-touch punch clamping portion, it can be combined and separated more quickly and simply in setting the punch, it has the effect of minimizing unnecessary waste of time and effort during work.

In addition, by pressing the punch set by the ejector to the upper side of the punch clamping portion to be in close contact with each other, so that the punch can be more firmly fixed, if you want to separate the punch from the punch clamping portion can be separated more quickly In addition, the one-touch punch-clamping unit has the effect of maximizing the operator's convenience and work efficiency.

In addition, by forming a guide groove and a guide jaw between the cylinder and the ram embedded therein, thereby preventing the ram from rotating during operation, problems that may occur due to the ram rotating, that is, the punch and die breakage, The part to be processed is not constant, and furthermore, it has an effect of preventing an accident in which the worker is injured by the generated debris.

In addition, by providing a one-touch die-clamping unit operated by the lever, it is possible to more quickly and simply combine and detach the die when setting the die bed, thereby reducing the unnecessary waste of time and effort.

In addition, by configuring the support provided in the clamping head portion with a wrench bolt to adjust the protruding length, there is an effect that can be fixed even if the size is different.

In addition, in setting the die to the die bed, the in-situ setting is made stable by the grooves and the projections, thereby causing problems that may occur when the die is incorrectly set, that is, punch and die breakage, Study is not constant, and furthermore has the effect of preventing accidents injured workers by the generated debris.

In addition, the die clamping unit is provided with a sensing unit to control the punching operation to be started only when the die is completely fixed, thereby preventing the occurrence of safety accidents or defective products that may occur due to the detachment of the die during the punching operation. Has an effect.

In addition, by mounting a safety cover that can be lifted and lowered in the punching center, to ensure the safety of the operator from debris scattered during work, and equipped with a sensing unit for detecting the position of the safety cover punching only when the safety cover is lowered By controlling the operation to be started, it is possible to prevent possible safety accidents in advance.

Claims (14)

In front of the main frame 10, a punching portion 20 consisting of a punching center 21 and a die 22 corresponding thereto, and a plurality of clamps 41 are provided to fix the workpiece and the bed 50 In the punch press machine which consists of the conveyance table 40 attached to the image, An X-axis transfer unit (60) including a motor driving unit (63) for transferring the transfer table (40) left and right on the bed (50); A Y-axis feeder (70) including a motor driver (73) for transporting the bed (50) back and forth on the main body frame (10) is provided; Punch press machine characterized in that the control unit 80 is provided for controlling the motor drive unit (63) (73). According to claim 1, wherein the X-axis transfer unit 60 and the guide sphere 61 provided on the lower surface of the transfer table (40); A guide rail 62 provided on the upper surface of the bed 50 to correspond to the guide tool 61; A nut housing 630 provided in the transfer table 40, a transfer screw 632 coupled to the nut housing 630, mounted on the bed 50, and controlled by the controller 80. And a motor driving part (63) consisting of a servo motor (632) for driving the transfer screw (632). According to claim 1, wherein the Y-axis transfer portion 70 is guide rods 72 provided on both sides of the main body frame (10); A transfer block 71 formed integrally with the bed 50 and provided to slide on the guide rod 72; A transfer screw 730 coupled to at least one of the transfer blocks 71 and a servo motor mounted on the main frame 10 and controlled by the controller 80 and driving the transfer screw 730. A punch press machine, comprising: a motor driving portion (73) formed of 731; The method of claim 1, wherein the punching center 21 is a case 210, a cylinder 220 mounted to the inside of the case 210, a ram 230 embedded in the cylinder 220, and The punch press machine is mounted to the lower side of the ram 230, punch punching unit 240 is set, the punch clamping unit is set to the punch clamping unit 240, characterized in that consisting of. The method of claim 4, wherein the punch (250) has a locking groove (251) formed on the outer peripheral surface of the upper side; The punch clamping part 240 has a punch insertion hole 241a formed at the center thereof, and includes a housing 241 in which a storage space portion 241b is formed, and the storage space portion 241b and has a button portion 247. A holding part (242) for fixing and releasing the punch (250) inserted into the punch insertion hole (241a) by; The ram 230 is a punch press machine, characterized in that the punch head inserting portion (231) formed in the center of the lower side. The method of claim 5, wherein the holding portion 242 is coupled to the button portion 247 to one side, the other side is elastically supported by the inner surface and the spring 243 of the storage space portion 241b, to the center A first holder 242a having a locking jaw 246 corresponding to one side of the locking groove 251 of the punch 250; A second holder 242b provided to correspond to the first holder 242a and having a locking jaw 246 corresponding to the other side of the locking groove 251 of the punch 250; The protrusion 245 is provided on the upper side of the first and second holders 242a and 242b and coupled to the groove 244 formed on the upper side of the first and second holders 242a and 242b. Punch press machine characterized in that consisting of a circular sliding disk (242c) formed. The method of claim 5, wherein the center of the ram (230) and the sleeve (261); The push rod 262 is mounted to the inner side of the sleeve 261, and provided with a fastener 263 as a protruding upper end, and a push head 264 protruding into the punch head inserting portion 231 at the lower end thereof. )Wow; Punch press machine characterized in that the ejector (260) consisting of a spring (265) provided to support the push head (264) between the sleeve (261) and the push rod (262). 5. The guide jaw 221 of claim 4, wherein a guide groove 232 is formed in a longitudinal direction on an outer surface of the ram 230, and a guide jaw 221 corresponding to the guide groove 232 on an inner surface of the cylinder 220. Punch press machine characterized in that formed. The die bed 30 of claim 1, wherein one side of the die bed 30 is opened to insert and fix the die 22 below the die 22. A guide frame 91 in front of the main body frame 10; The clamping head is installed between the guide frame 91, both sides of the lower side is hinged on the guide frame 91, the clamping head is provided with a support 920 for pressing the side of the die 22 to the top Section 92; A lever portion 93 provided at a lower side, both sides of which are hinged on the guide frame 91, and a stopper 93 1 provided with a stopper 931 between the body frame 10; The connector is provided between the clamping head 92 and the lever 93, the upper side is hinged to the lower side of the clamping head 92, the lower side is hinged to the upper side of the lever 93 ( Punch press machine, characterized in that provided with a die clamping portion (90) made of 94. 10. The punch press machine according to claim 9, wherein the supporter (920) is made of a wrench bolt, and is helically coupled to the clamping head (92). 10. The method of claim 9, wherein the groove 22 is formed on the lower side of the die 22, the projections 245 corresponding to the groove 23 is formed above the die bed 30, characterized in that Punch press machine. The punch press machine according to claim 9, wherein a sensing unit 95 is provided below the guide frame 91 to detect a position of the lever 930 and output a signal to the control unit 80. . The punch press machine according to claim 1, wherein the punching center (21) is equipped with a safety cover (270) to be capable of raising and lowering. The punch press machine according to claim 13, wherein the punching center (21) is provided with a sensing unit (272) for detecting a rise of the safety cover (270) and outputting a signal to the control unit (80).