JP4398476B2 - Punch press - Google Patents

Description

  The present invention relates to a punch press such as a turret punch press, and more specifically, when a punch die is pressed by a striker provided on the punch press so as to be movable up and down, a working fluid such as an oil mist is supplied to the punch press. The present invention relates to a punch press provided with a working fluid supply device for supplying a jet to a punch die.

2. Description of the Related Art Conventionally, a punch die having a punch die and a die die for performing press working on a plate-like workpiece and having a striker that can freely press the punch die is movable up and down. In order to prevent debris rising after lubrication, cooling and punching, etc., the working fluid supply device is provided, the striker is provided with an oil mist supply hole, and the punch mold side is connectable with the oil mist supply hole. A punch press having an introduction hole for introducing oil mist to the tip side has been developed.
Japanese Utility Model Publication No. 4-134220

  In the conventional punch press as described above, when the punch die is pressed by a vertically movable striker, the oil mist is jetted and supplied from the oil mist supply hole provided in the striker to the introduction hole provided in the punch die. Therefore, lubrication and cooling of the punch die are effectively performed, and it is effective and useful for preventing the scraps from rising after the workpiece is punched.

  However, conventionally, when supplying a working fluid such as oil mist from a pressure system such as a pump to a punch mold, the oil mist or the like is supplied with a constant discharge amount regardless of the diameter size of the punch mold. It is what. In this case, if the discharge amount of the working fluid is set to be constant for the small-diameter punch die, the working fluid tends to be insufficient in the case of the large-diameter punch die. In general, the discharge amount is set to be constant corresponding to the mold.

  Therefore, conventionally, a large amount of working fluid is always discharged in response to a large-diameter size punch die, and in the case of a small-diameter size punch die, there is an excessive amount of oil and spraying around may occur. There is a problem that the work environment is polluted and an operation for removing oil mist adhering to the work more than necessary is required.

  Accordingly, it is desired to supply an appropriate amount of working fluid such as oil mist corresponding to the punch diameter size.

  By the way, in order to control the working fluid such as oil mist to an appropriate amount corresponding to the punch diameter size of the punch mold, it is necessary to know the diameter size of the punch mold indexed and positioned relatively below the striker. There is.

  As a method of detecting the diameter size of the punch die, for example, as described in Japanese Patent No. 2507722, a bar code in which data such as the diameter size is written is provided in a part of the punch head provided on the upper part of the punch, It is also possible to adopt a configuration in which the bar code is detected by a sensor to detect the diameter size of the punch die. In this case, there is a problem that if the bar code becomes dirty, it is difficult to detect by the sensor.

  Further, as described in Japanese Utility Model Publication No. Hei 4-134220, an ID chip (ID tag is also synonymous) is provided in a punch head of a punch die, and data is read from the ID chip and data is recorded with respect to the ID chip. It is also possible to adopt a configuration in which punch diameter size data is read from the ID chip.

  By the way, as is well known, there are a punch die having a working fluid introduction hole and a general punch die having no introduction hole, and a cutting blade provided at the lower end of the punch body. When the portion is worn, the punch die may be disassembled and the cutting blade portion may be repolished and reused, or the punch body or punch head may be replaced with a new separate punch body.

  When the punch body or punch head is replaced and used as described above, in the configuration in which the punch head is provided with an ID chip, data may need to be rewritten to the ID chip. In the management of whether there is an introduction hole or the like, there is a certainty that certainty is lacking, and further improvement is required for full automation.

  Further, the punch head portion is made of metal, and the ID tag data cannot be read due to the influence of the surrounding metal in the structure in which the punch head portion is provided with holes such as counterbores and the ID tag is simply embedded. There is a need for improvements to provide ID tags.

The present invention has been made in view of the conventional problems as described above, and is provided with a punch die and a die die for performing press working on a plate-like workpiece, and a striker capable of freely pressing the punch die. And a working fluid supply device for supplying a working fluid of an oil mist to an introduction hole provided in the punch die when the punch die is pressed by the striker. In order to read the data of the ID tag provided on the upper part of the punch mold, a connection control circuit is provided with an on-off valve that can connect and disconnect the connection circuit and a valve control device that controls the operation of the on-off valve. The valve control device for controlling the opening / closing time of the on-off valve based on data read by the reader A discriminating means for discriminating the diameter size of the punch die from the data signal of the ID tag read by the reader; a data table storing the relationship between the punch die diameter size and the opening / closing time of the on-off valve; And an open / close time control unit for controlling the open / close time of the open / close valve based on data in the data table.

  Further, in the punch press, a connection circuit for supplying air to the oil tank and pressurizing the oil tank is connected to an oil tank provided in the working fluid supply device.

  In the punch press, the working fluid supply device includes a plurality of on-off valves connected in parallel.

  According to the present invention, the diameter size data or the like of the punch mold relatively indexed and positioned so as to correspond to the striker is automatically read from the ID tag provided in the punch mold, and the punch mold Since an appropriate amount of working fluid corresponding to the diameter size can be automatically supplied, the working fluid does not become excessive or insufficient, and the above-described problems can be solved.

  Referring to FIG. 1, a punch press 1 according to an embodiment of the present invention includes a punch die P and a die die D for pressing a plate-like workpiece W, and the punch die P is provided. A striker 3 that can be freely pressed is provided to move up and down. The punch die P and the die die D are detachably mounted on the punch holder 5 and the die holder 7 in the same manner as a general punch press.

  The punch holder 5 and the die holder 7 correspond to, for example, a rotatable upper and lower turret in a turret punch press, and the punch holder 5 and the plurality of punch dies P and die dies D supported by the die holder 7 are It is provided so that it can be indexed and positioned below the striker 3. In the punch press, a striker 3 that is movable up and down with respect to the upper and lower punch holders 5 and 7 is moved in one direction of the X and Y axes or in the X and Y axis directions, so There is also a punch press that can be indexed and positioned at an upper position.

  In the punch press 1, relative indexing positioning of the punch die P and die die D to the position corresponding to the striker 3, and X and Y of the workpiece W to the processing position (position corresponding to the striker 3). The operations of the punch press 1 such as the relative movement positioning in the direction and the vertical movement of the striker 3 are controlled by the NC device 9 in the same way as a normal punch press, and this type of punch press is known. A more detailed description of the punch press 1 is omitted.

  The striker 3 is provided with a fluid supply port 11 that is connected to an introduction hole (not shown) provided in the punch die P and ejects a working fluid such as oil mist when the punch die P is pressed. A working fluid supply device is connected to the fluid supply port 11. That is, in the connection circuit 15 that connects the fluid supply port 11 and the pressure source 13, an appropriate on-off valve 17 such as a solenoid valve that can freely connect and disconnect the connection circuit 15 is disposed. Further, the connection circuit 15 is provided with a negative pressure generating device 19 that generates a negative pressure when the on-off valve 17 is opened by connection and sucks oil from the oil tank T. In the connection circuit 21 connected to the oil tank T, an appropriate on-off valve 23 such as a solenoid valve that can freely connect and disconnect the connection circuit 21 is disposed. The oil tank T is connected to a branch passage 15A that pressurizes the oil tank T.

  Control of opening / closing of the on-off valves 17 and 23 is performed by a valve control device 25. In order to input the diameter size data and the like of the punch die P to be pressed by the striker 3 to the valve control device 25, the punch die P has an air in which the punch die P has an introduction hole. An RFID (Radio Frequency-IDentification) tag 27 (hereinafter referred to as an ID tag) that stores data relating to the supply amount of working fluid such as data indicating a blow punch and diameter size data is provided, and the striker 3 is provided with the striker 3. Is provided with an antenna 29A of a reader / writer 29 for reading data stored in the ID tag 27 and writing data to the ID tag 27.

  A data signal read by the reader / writer 29 is input to the valve control device 25. In the valve control device 25, it is determined whether the diameter of the punch die P belongs to large, medium or small according to the input data signal, and it is a normal punch having no introduction hole. By discriminating, the opening / closing of the on-off valves 17 and 23 is controlled.

  Therefore, in order to determine the punch die P, the valve control device 25 includes a determination means 31. Whether the discriminating means 31 is a normal punch die having no introduction hole and an air blow punch having an introduction hole belonging to a small diameter or an air blow punch belonging to a medium diameter by the data signal. It is determined whether or not the air blow punch belongs to a large diameter.

  When the determining means 31 determines that the punch die P is a normal punch die, the on-off valves 17 and 23 are held in a closed state, and normal pressing is performed. When the punching die P is an air blow punch by the discriminating means 31 and the diameter size thereof is discriminated, the opening / closing valve 17 is controlled to open and corresponds to the discriminated diameter size of the punching die P. Thus, the open / close time of the open / close valve 23 is calculated.

  That is, in the present embodiment, the data table 33 that stores (stores) the relationship between the punch size and the opening / closing time is searched, and the opening / closing time corresponding to the determined punch diameter is obtained. The opening / closing time of the opening / closing valve 23 is controlled by the opening / closing time control unit 35 based on the searched opening / closing time. The opening / closing time of the on-off valve 23 gradually becomes shorter in response to the large, medium, and small diameters of the punch mold P, and a large amount of the punch mold P belonging to the large diameter is used. A working fluid is supplied, and a small amount of working fluid is supplied to a punch die belonging to a medium amount and a small diameter corresponding to a punch die belonging to a medium diameter.

  In the above configuration, when the punch press 1 is operated under the control of the NC device 9 and the appropriate punch die P and die die D are relatively indexed and positioned at the position of the striker 3, The data of the provided ID tag 27 is read by the reader / writer 29 via the antenna 29A and input to the valve control device 25. Then, the discriminating means 31 discriminates whether or not the punch die P is a normal punch die and whether the diameter size is large, medium or small when it is an air blow punch.

  Note that when the punch die without the ID tag 27 is relatively indexed and positioned at the lower position of the striker 3, the reader / writer 29 cannot read the data. It is determined that the punch is a normal punch die. In the case of a punch die having an ID tag, the type of the punch die is determined based on the presence / absence of data indicating air blow punch.

  The data table 33 is searched based on the discrimination result of the discrimination means 31 and the opening / closing time suitable for the diameter size of the punch die P located below the striker 3 is obtained. When the punch die P is pressed by the striker 3, the opening / closing time of the opening / closing valve 23 is controlled by the opening / closing time control unit 35 based on the searched opening / closing time, and the amount suitable for the diameter size of the punch die P. The working fluid is supplied.

  That is, when it is determined that the punch die P is an air blow punch, the on-off valve 17 is opened and air from the pressure source 13 is supplied to the fluid supply port 11 of the striker 3. When air is supplied in this way, a negative pressure is generated in the negative pressure generator 19, and the inside of the oil tank T is pressurized. Therefore, when the opening / closing valve 23 is opened, the oil tank T The oil is sucked and jetted and supplied as oil mist from the fluid supply port 11 to the introduction hole of the punch die P.

  Therefore, an appropriate amount of oil mist suitable for the diameter size of the punch die P can be supplied without excess or deficiency, and the conventional problems as described above can be solved.

  By the way, in the above description, it has been explained that the supply time of the working fluid is controlled by controlling the opening / closing time of the on-off valve 23. However, as shown by the imaginary line in FIG. A plurality of on-off valves 23A and 23B having different diameters may be connected in parallel, and appropriate on-off valves 23, 23A and 23B may be selected corresponding to the sizes of the large, medium and small diameters of the punch. In this case, it is possible to select individually or a combination of a plurality of on-off valves and simultaneously select them. The corresponding two on-off valves can handle large, medium and small punch diameters.

  In the above description, the case of the diameter size has been described as the data related to the working fluid supply amount. However, the data of the supply amount itself may be stored in the ID tag 27 in advance.

  Referring to FIG. 2, the punch die P is provided with a cylindrical punch guide 37 supported by the punch holder 5 so as to be movable up and down. An upper portion of the punch guide 37 is an O-ring or the like. A retainer collar 41 is detachably attached via an elastic member 39.

  In the punch guide 37, a punch body 43 having a cutting edge portion 43A at the lower end portion is fitted so as to be movable up and down, and the upper end of the punch body 43 penetrating the retainer collar 41 so as to be movable up and down. The part is formed with a male screw part. A ring-shaped punch head 45 is detachably screwed into the male screw portion.

  A strong elastic member 47 such as a stripper spring is mounted between the punch head 45 and the retainer collar 41. The punch head 45 and the elastic member 47 are surrounded by a cylindrical safety cover 51 having a lower end fixed to the retainer collar 41 by a locking member 49 such as an O-ring. The upward protrusion and the outward protrusion provided at the lower portion of the punch head 45 engage with each other, thereby restricting the upward movement of the punch head 45 and the upward biasing force of the elastic member 47. It is configured to be received by the safety cover 51. In order to prevent rotation of the punch head 45 with respect to the safety cover 51, a pin 53 is fixed to the punch head 45 through a slot 51 </ b> S in the vertical direction provided in the safety cover 51.

  In order to introduce the working fluid ejected from the fluid supply port 11 provided in the striker 3, an introduction hole 55 is provided in the upper end surface of the punch body 43. The introduced working fluid is provided so as to penetrate through the outer peripheral surface of the punch body 43 and the vicinity of the lower end of the punch body 43 as appropriate.

  A stick-shaped ID tag 57 is provided in the upper portion of the introduction hole 55. The ID tag 57 stores data indicating that at least the punch body 43 has the introduction hole 55 and data indicating the diameter size of the punch body 43 and the like. Further, in order to manage the punch body 43, for example, various data such as mold material, shape, number of re-polishing, etc. can be stored.

  As shown in FIGS. 2 and 3, the ID tag 57 is attached so that a part of the ID tag 57 is exposed on the inner peripheral surface of the introduction hole 55 so that the flow of the working fluid introduced into the introduction hole 55 is not obstructed. Thus, the space near the inlet and the upper surface of the introduction hole 55 is provided as a magnetic field generation area of the ID tag 57.

  When the ID tag 57 is provided at the upper end of the punch body 43, the punch body 43 is placed on the portion where the ID tag 57 is provided from the position of the ID tag 57 in order to reduce the influence of surrounding metal. A recess 43S that is open on the outer peripheral surface side or a slit 43S communicating with the outer peripheral surface is provided. Further, as indicated by an imaginary line in FIG. 2, an open recess 43 </ b> C may be provided on the upper end surface side and the outer peripheral surface side of the punch body 43, and an ID tag 57 may be provided in the recess 43 </ b> C. is there. By adopting such a configuration, a relatively wide space can be secured around the ID tag 57, and the influence of surrounding metal can be suppressed. It is also possible to form recesses such as holes at a plurality of locations around the ID tag 57 to form space portions of the magnetic field generation area.

  As shown in FIG. 2, the antenna 29A of the reader / writer 29 for reading data stored in the ID tag 57 has an insulating member 59 in a groove formed on the lower surface or the outer peripheral surface of the lower end of the striker 3. Is provided.

  With the above configuration, as described above, when the punch die P is moved and positioned relative to the lower position of the striker 3, the data stored in the ID tag 57 is read by the reader / writer 29 and is stored in the valve controller 25. Entered. As described above, the diameter size of the punch body 43 is determined, and an amount of working fluid suitable for the diameter size is supplied and introduced into the introduction hole 55.

  By the way, since the punch die P has a configuration in which the ID tag 57 is provided in the introduction hole 55 provided in the punch body 43, the punch body 43 is removed from the punch head 45 for re-polishing the cutting edge portion 43A. Even if the punch head or the like is exchanged at the time of removal or reassembly, the data of the punch body 43 itself does not change, so that no problem is caused. That is, the punch body itself can be easily managed.

  The ID tag is not limited to the stick shape described above, and may be a pipe-shaped or ring-shaped ID tag 57A fitted and fixed to the upper inner peripheral surface of the introduction hole 55 as shown in FIG. It is.

  As shown in FIG. 2, the antenna 29A may be provided with a recess 3C formed in the center of the striker 3 and a coiled antenna 29B provided in the recess 3C. Is.

  As described above, in the configuration in which the striker 3 is provided with the antennas 29A and / or 29B, when the striker 3 is positioned above the punch die P having the ID tag 57, the antennas 29A and / or 29B are effective. The antennas 29A and 29B and the ID tag 57 are provided with a correlation so that a portion of about 1/2 or more of the ID tag 57 is located inside the diameter.

  As already understood, the punch body 43 has a small diameter since the ID tag is provided in the upper or upper end of the introduction hole 55 provided in the punch body 43 and the recess formed open to the outer peripheral surface side. Even when the upper end portion has a smaller diameter, the ID tag can be easily provided with the rigidity of the upper end portion maintained.

  Furthermore, according to the above configuration, it is easy to read the data stored in the ID tag 57 provided on the punch die via the antennas 29A and 29B provided on the striker 3, which eliminates the conventional problems as described above. It is possible.

  In the above description, a single body provided with a blade part at the lower part and a ring-shaped punch head at the upper part has been described as a punch body. However, as a structure of the punch body, the upper part provided with the punch head and the blade part are provided. It is good also as a structure which divided | segmented into the provided lower side, and integrated the upper side and the lower part side with the volt | bolt etc.

It is a conceptual explanatory view showing a conceptual configuration of a punch press according to an embodiment of the present invention. It is a section explanatory view of a punch metallic mold concerning an embodiment of the invention. It is a plane explanatory view same as the above. It is explanatory drawing at the time of forming an ID tag in a ring shape or a pipe shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Punch press 3 ... Striker 9 ... NC apparatus 11 ... Fluid supply port 13 ... Pressure source 15 ... Connection circuit 17, 23 ... Open / close valve 25 ... Valve control device 29 ... Reader / writer 29A, 29B ... Antenna 31 ... Discrimination means 33 ... Data table 35 ... Opening / closing time control unit 37 ... Punch guide 43 ... Punch body 45 ... Punch head 55 ... Introduction hole 57 ... ID tag P ... Punch die D ... Die die W ... Workpiece

Claims (3)

A punch die and a die die for performing press working on a plate-like workpiece, a striker that can freely press the punch die, and the punch die when the punch die is pressed by the striker In a punch press provided with a working fluid supply device that jets and supplies oil mist working fluid to an introduction hole provided in a mold, a connection circuit for supplying the working fluid is provided with an open / close valve capable of disconnecting the connection circuit. The valve control device for controlling the operation of the on-off valve is provided, the reader antenna for reading the data of the ID tag provided on the upper part of the punch die is provided in the striker, and based on the data read by the reader From the data signal of the ID tag read by the reader to the valve control device for controlling the open / close time of the open / close valve A discriminating means for discriminating the diameter size of the punch mold, a data table storing the relationship between the punch die diameter size and the opening / closing time of the on-off valve, and based on the data in the data table, A punch press comprising an opening / closing time control unit for controlling the opening / closing time.   2. The punch press according to claim 1, wherein a connection circuit for supplying air and pressurizing the oil tank is connected to an oil tank provided in the working fluid supply device. .   3. The punch press according to claim 1, wherein a plurality of on-off valves are connected in parallel to the working fluid supply device. 4.

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