JP6593944B1 - PRESS MACHINE, PRESS MACHINE COMPONENT MANUFACTURING METHOD, AND CONTAINER MANUFACTURING METHOD - Google Patents

Abstract

[PROBLEMS] To provide a press machine having a higher punch cooling performance and a higher operation speed, a method for producing components of such a press machine, and a container production using such a press machine. Provide a method. A press machine according to an embodiment of the present disclosure includes a punch cooler that is fitted to the outside of a punch, and a flow path through which a coolant liquid flows is formed in the punch cooler. Then, the punch cooler 40 moves relative to the punch 20 to cool the punch 20. The punch cooler 40 also serves as a stripper for detaching the workpiece 90 from the punch 20. [Selection] Figure 7

Description

  The present disclosure relates to a press, a method for manufacturing a press machine component, and a method for manufacturing a container using the press.

  When the operating speed of the press machine is increased, the amount of heat deformation of the punch increases as well as the amount of heat generated by the punch, causing problems such as the workpiece shape exceeding an allowable error. On the other hand, as a conventional press machine, there is known a machine in which a flow path for flowing a coolant liquid is formed in a punch (see, for example, Patent Document 1).

JP 2006-281222 A (Claim 1, FIG. 19)

  However, in the conventional press machine, the size of the flow path is restricted in order to secure the punch strength, so that the cooling performance cannot be increased, and as a result, the operation speed of the press machine cannot be increased. For this reason, development of the technique which can make the cooling performance of a punch higher than before and can raise the operating speed of a press machine is calculated | required.

The invention according to claim 1 which has been made in order to achieve the above object, a punch cooler punch have a punch through hole penetrating, cooling the pre-Symbol punch, are formed on the punch cooler, via the punch cooler A flow path through which a coolant liquid for indirectly cooling the punch flows without touching the punch, and a cooler support portion that supports the punch cooler so as to move relative to the punch. Machine.

The invention according to claim 2 is the press machine according to claim 1, wherein the cooler support portion supports the punch cooler so that a tip end portion of the punch is located in the punch through hole at a top dead center of the punch. It is.

  The invention according to claim 3 is a state in which the cooler support portion moves the punch cooler in the same direction as the movement direction of the punch, and the tip end portion of the punch is positioned in the punch through hole. The press according to claim 1, wherein the press is maintained.

  The invention according to claim 4 is the press machine according to claim 1 or 2, wherein the cooler support portion fixes the punch cooler, and the punch cooler moves relative to the punch by the direct movement of the punch. It is.

  According to a fifth aspect of the present invention, in the punch according to any one of the first to fourth aspects, the punch cools the workpiece into a cylindrical shape, and the punch cooler also serves as a stripper for detaching the workpiece from the punch. It is a press machine.

  The invention of claim 6 is provided with a transfer device that forms a plurality of punches in a row and forms a workpiece into a cylindrical shape, and intermittently conveys the workpieces in an arrangement direction of the plurality of punches, The press machine according to any one of claims 1 to 5, wherein the press machine is provided on all or some of the plurality of punches.

  A seventh aspect of the present invention is the press machine according to any one of the first to sixth aspects, wherein the punch cooler has a sleeve shape and is provided for each punch.

  The invention according to claim 8 is the press according to any one of claims 1 to 6, wherein the punch cooler has a plurality of punch through holes and is provided in common to the plurality of punches. Machine.

  According to a ninth aspect of the present invention, the punch cooler has a step portion in an intermediate portion in the axial direction of the punch, and a base end side of the step cooler is supported by the cooler support portion. The base portion having openings at both ends of the flow path, and the tip end side from the stepped portion is a focused cooling portion that is flat in a direction orthogonal to the axial direction. The press according to the claims.

  A tenth aspect of the present invention is the press machine according to any one of the first to ninth aspects, further comprising a sensor accommodation hole formed in the punch and a temperature sensor accommodated in the sensor accommodation hole. is there.

  The invention according to claim 11 is the press according to claim 10, further comprising an equilibrium determination unit that determines whether the temperature of the punch is in an equilibrium state based on a detection result of the temperature sensor.

  A twelfth aspect of the present invention is a method of manufacturing a press machine component in which the punch cooler of the press machine according to any one of the first to eleventh aspects is manufactured by an additive manufacturing method using maraging steel. It is.

  A thirteenth aspect of the present invention is a container manufacturing method for manufacturing a container using the press machine according to any one of the first to eleventh aspects.

  In the press machine according to the present disclosure, the punch cooler in which the coolant liquid flows can be relatively moved by being fitted to the punch to cool the heat generation portion of the punch. Thereby, the restriction | limiting of the magnitude | size of a flow path is relieve | moderated compared with the past, a cooling performance can be raised, and the operating speed of a press machine can be made high by that much.

  Note that a flow path through which the coolant liquid flows may also be formed in the punch to further increase the cooling performance and further increase the operation speed of the press.

  Further, since the flow path can be eliminated or reduced from the punch by providing the punch cooler, the temperature of the punch can be monitored by incorporating a temperature sensor in the punch as in the configuration of claim 10.

  The tip of the punch generates the most heat. On the other hand, the tip of the punch is positioned inside the punch cooler at the top dead center of the punch as in the configuration of claim 2, or during the movement of the punch as in the configuration of claim 3. If the punch cooler is moved in the same direction and the tip of the punch is maintained inside the punch cooler, the tip of the punch can be cooled over a long time, and the cooling efficiency is improved.

  In the press machine according to the fourth aspect, since the punch cooler is fixed, the coolant liquid can be easily supplied to the punch cooler.

  In the press machine according to the fifth aspect, the punch cooler also serves as a stripper for detaching the workpiece from the punch, so that it is more compact than those provided separately.

  Since the so-called transfer press machine having the transfer device as in the press machine of claim 6 has a punch that is often thin and long, it is difficult to form a flow path in the punch, and a punch cooler is provided. The effect is increased.

  Since the punch cooler of the press machine of claim 7 has a sleeve shape, the periphery of the punch including the punch cooler can be made compact.

  The punch cooler of the press machine according to claim 8 has a plurality of punch through holes and is provided in common to the plurality of punches, so that the number of parts can be suppressed and the entire press machine becomes compact. In this case, a flow path may be provided independently for each punch through hole, or a flow path common to a plurality of punch through holes may be provided to reduce the number of inlets and outlets of the flow path.

  In the press machine of the ninth aspect, the cooling performance is improved because the important point cooling portion on the tip end side of the punch cooler has a flat shape that easily radiates heat. Thereby, the front-end | tip part of a punch can be cooled efficiently.

  In the press machine according to the eleventh aspect, it is possible to easily determine whether or not the shape of the formed workpiece is stable based on whether or not the temperature of the punch is in an equilibrium state based on the detection result of the temperature sensor.

  In the manufacturing method of the press machine component according to claim 12, the punch cooler can be made of maraging steel, so that the hardness can be increased as compared with carbon steel, carbide, etc. that are usually used, and the durability is improved. be able to. Moreover, although maraging steel is difficult to process, a punch cooler made of maraging steel can be easily manufactured by using the layered manufacturing method.

  In the container manufacturing method according to the thirteenth aspect, if the container is manufactured using the press machine according to any one of the first to eleventh aspects, the productivity can be increased as compared with the conventional method.

Front view of the press machine of the first embodiment Perspective view of processing stage Perspective view of processing stage Side sectional view of the machining stage where the punch is at top dead center Side sectional view of the machining stage where the punch is located at the bottom dead center Front sectional view of the machining stage where the punch is located at the bottom dead center Perspective view of processing stage Cross section of punch cooler Conceptual diagram of additive manufacturing equipment Block diagram of press machine control system The perspective view of the punch cooler of a 2nd embodiment Cross section of processing stage Side sectional view of the processing stage of the third embodiment

[First Embodiment]
Hereinafter, the press machine 10 of 1st Embodiment is demonstrated with reference to FIGS. FIG. 1 shows the entire press machine 10 of the present embodiment. Hereinafter, the horizontal direction in FIG. 1 is referred to as the horizontal direction H1 of the press machine 10, and the direction orthogonal to the paper surface of FIG. 1 is referred to as the “front side” of the press machine 10 and the opposite side is referred to as the rear side. The “right side” and “left side” in FIG. It shall be referred to as “right side” and “left side”.

  The press machine 10 according to the present embodiment is a so-called transfer press machine, and includes a plurality of processing stages each having a punch 20 and a die 30 facing each other in a horizontal row. The plurality of punches 20 of the plurality of machining stages are held by the plurality of punch holders 13 on the lower surface of the ram 12 and arranged in a line at equal intervals, and the plurality of dies 30 are placed on the plurality of die holders 15 on the upper surface of the bolster 14. It is held and arranged in a line at equal intervals. A pair of rails 16A (only one rail 16A is shown in FIG. 1) of the transfer device 16 extends in the horizontal direction H1 and faces in the front-rear direction H2 across a plurality of processing stages. A plurality of pairs of fingers 17 (see FIG. 3) are disposed opposite to the pair of rails 16A. Further, on the left side of the leftmost processing stage, there is provided a workpiece supply device 18 for punching a blank material from a sheet metal and drawing it into a cylindrical workpiece 90 with one end.

  Each time the ram 12 moves up and down, the workpiece 90 supplied from the workpiece supply device 18 is sequentially moved to the processing stage on the right by the transfer device 16 and is pressed to approach the predetermined product shape. . In addition, the workpiece 90 that has been pressed at the processing stage of the final process at the right end is discharged as a pressed product to a chute (not shown). The chute includes a chute for an OK product and a chute for an NG product, and any one of the chutes is selected by a sorting device 99 (see FIG. 10).

  2 to 7 show an example of the processing stage. As shown in FIG. 5, in this processing stage, for example, a cylindrical workpiece 90 is ironed or drawn. For this purpose, the forming hole 31 of the die 30 is provided with a reduced diameter portion 32 formed by reducing the diameter near the upper end position. Further, the die holder 15 has a through hole 15 </ b> A formed below the forming hole 31, and a knockout pin 33 is accommodated therein.

  On the other hand, the punch 20 has a shape in which a round bar-shaped punch body 22 extends from the center of the lower surface of the columnar base portion 21 held by the punch holder 13. A gas vent hole 23 is formed at the center of the punch body 22. The gas vent hole 23 includes a vertical hole portion 23A extending from the front end surface of the punch body 22 to a position closer to the front end, and a horizontal hole portion 23B extending forward from the upper end portion of the vertical hole portion 23A. And the outer surface. When the punch 20 (specifically, the punch main body 22) is inserted into and extracted from the work 90, air passes through the gas vent hole 23.

  As shown in FIG. 6, the punch 20 is formed with three sensor housing holes 24 </ b> A, 24 </ b> B, and 24 </ b> C that extend from the upper end surface to an intermediate position in the vertical direction of the punch body 22. These sensor receiving holes 24A, 24B, and 24C are dispersedly arranged at positions separated from the central axis of the punch 20 by the same distance. Further, the positions of the lower ends of the sensor receiving holes 24A, 24B, and 24C are different from each other, the lower end of the sensor receiving hole 24A is disposed at the lower end portion of the punch 20, and the lower end of the sensor receiving hole 24B is substantially the center of the punch body 22 in the vertical direction. The lower end of the sensor housing hole 24 </ b> C is disposed at the upper end of the punch body 22. Further, these sensor housing holes 24A, 24B, and 24C accommodate temperature sensors 24S (for example, thermocouples), respectively, so that the temperatures of the lower end portion, the substantially central portion, and the upper end portion of the punch body 22 are detected. It has become.

  As shown in FIG. 1, in the press machine 10 of this embodiment, the punch cooler 40 for cooling the punch 20 is provided in all the processing stages, for example. As shown in FIG. 8, the punch cooler 40 has a sleeve shape having a punch through hole 49 penetrating vertically through the center portion, and is fitted to the outside of the punch body 22 as shown in FIG. 2. In the outer portion of the punch cooler 40, the upper half substantially forms a cylindrical base portion 41, while the lower half substantially forms a intensive cooling portion 42 that is flat in the front-rear direction H2.

  In detail, the horizontal cross section of the priority cooling unit 42 has, for example, a shape in which a pair of opposed sides of a flat octagon that is long in the horizontal direction H1 is formed in an arc shape. And the base part 41 and the priority cooling part 42 are arrange | positioned coaxially, and the punch through-hole 49 mentioned above has penetrated those center parts. Note that the circular surfaces at both ends in the lateral direction H1 of the priority cooling unit 42 are flush with the outer peripheral surface of the base unit 41 (see FIG. 8).

  As shown in FIG. 2, the punch cooler 40 is supported by the support lever 19 so as to be movable up and down. For this purpose, a pair of engaging grooves 46 in the shape of square grooves extending in the front-rear direction H2 are formed on both sides of the outer peripheral surface of the base portion 41 in the lateral direction H1.

  The support lever 19 corresponds to a “cooler support portion” in the claims, extends in the front-rear direction H2, and is supported so as to be rotatable in the middle in the longitudinal direction. Further, the front end portion of the support lever 19 is a pair of support arms 19B which are divided into two branches and face each other in the lateral direction H1. A base portion 41 of the punch cooler 40 is disposed between the pair of support arms 19B.

  As shown in FIG. 6, a hinge hole 19C penetrating in the lateral direction H1 is formed at the tip of the pair of support arms 19B. A cylindrical sliding collar 47 is rotatably fitted in each hinge hole 19C. Further, a flange 47F projects laterally from one end of the sliding collar 47 and overlaps with the opposing surfaces of the pair of support arms 19B.

  A support pin 48 is press-fitted inside each sliding collar 47. On one end surface of each support pin 48, a prismatic engagement protrusion 48A extending in the front-rear direction H2 is formed. The engaging protrusions 48A of the pair of support pins 48 are slidably engaged with the pair of engaging grooves 46 of the punch cooler 40. Thereby, the punch cooler 40 moves up and down in conjunction with the rotation of the support lever 19. At this time, the engagement protrusion 48A slides in the front-rear direction within the engagement groove 46.

  Although not shown, the drive mechanism of the support lever 19 is, for example, as follows. That is, the support lever 19 is rotatably supported by the first stand that rises from the upper rear side of the bolster 14. A second stand is attached to the rear lower portion of the bolster 14, and the relay lever supported rotatably on the second stand and the rear portion of the support lever 19 are connected via a connecting bar extending in the vertical direction. Has been. Further, the relay lever is in contact with a cam (not shown) of a camshaft 72 (see FIG. 1) extending in the lateral direction H1 below the bolster 14. As shown in FIG. 1, the camshaft 72 is gear-coupled to a main camshaft 71 that drives the ram 12 via a relay shaft 73 that extends in the vertical direction on the left side of the press 10. As a result, the support lever 19 is rotated in conjunction with the raising and lowering operation of the ram 12 and the punch cooler 40 is raised and lowered. The main camshaft 71 is driven by a motor 70 disposed at the top of the press 10.

  The pair of rails 16A (see FIG. 1) of the transfer device 16 linearly moves in the lateral direction H1 in conjunction with the lifting and lowering operation of the ram 12 by a cam (not shown) provided in the middle of the relay shaft 73. . Further, the pair of fingers 17 is urged in a direction approaching each other by a compression coil spring (not shown), and is opened and closed by sliding contact with the punch cooler 40 as described later.

  The punch cooler 40 linearly moves relative to the punch 20 between the relative upper limit position shown in FIG. 5 and the relative lower limit position shown in FIG. In the relative upper limit position shown in FIG. 5, for example, the upper surface of the punch cooler 40 is adjacent to the lower surface of the base portion 21 of the punch 20, and the tip portion of the punch body 22 protrudes below the punch cooler 40. Further, at the relative lower limit position shown in FIG. 4, for example, the front end portion of the punch 20 is received in the priority cooling portion 42 of the punch cooler 40, and the lower end surface of the punch 20 is slightly above the lower end surface of the punch cooler 40. To position.

  In order to prevent the upper opening of the vent hole 23 of the punch 20 from being blocked at an arbitrary position between the relative upper limit position and the relative lower limit position, the punch through hole 49 has its upper and lower A vent portion 49A is formed by slightly expanding the range from the approximate center of the direction to the position near the lower end, and a vent hole 49B penetrating between the inner surface of the vent portion 49A and the front outer surface of the punch cooler 40 is formed. Is formed.

  As shown in FIG. 7, the punch cooler 40 is formed with a flow path 43 through which a coolant liquid flows, and the first opening 43 </ b> A and the second opening 43 </ b> B at both ends of the flow path 43 are formed on the front surface of the base portion 41. It is lined up and down. The first opening portion 43A and the second opening portion 43B have a circular cross section and extend from the front surface of the base portion 41 to a position closer to the punch through hole 49, and the curved portions 43C and 43G at one end and the other end of the flow path body 43Z. It is connected to the.

  The curved portion 43C at one end of the flow path body 43Z extends in a curved manner along the inner peripheral surface of the punch through hole 49 from the front adjacent to the left side of the punch through hole 49 at the upper portion of the base portion 41. The curved portion 43G at the end extends in a curved manner along the inner peripheral surface of the punch through hole 49 from the front side to the right side of the punch through hole 49 at the lower portion of the base portion 41. The flow path body 43Z includes the following first hairpin portion 43D, intermediate curved portion 43E, and second hairpin portion 43F between the curved portions 43C and 43G.

  The first hairpin portion 43D is bent at a right angle downward from the end portion of the curved portion 43C and extends to a position near the lower surface of the punch cooler 40, and is then folded back upward from the side away from the punch through hole 49. It extends to the bottom.

  The intermediate bending portion 43E is bent at a right angle rearward from the end of the first hairpin portion 43D and extends curvedly along the rear outer peripheral surface of the base portion 41 to an opposite position about 180 degrees around the base portion 41 therefrom. ing.

  The second hairpin portion 43F is bent at a right angle downward from the end of the intermediate bending portion 43E and extends to a position closer to the lower surface of the punch cooler 40, and is then folded back upward on the side approaching the punch through hole 49. It extends to the lower part of the other end and is connected to the curved part 43G at the other end.

  Further, the cross section of the flow path body 43Z has a flat shape such as an elliptical shape or a long hole shape, for example, and is arranged so that the longitudinal direction of the flat shape faces the axial direction or the circumferential direction of the punch through hole 49. .

  Further, screws are formed on the inner surfaces of the first opening 43A and the second opening 43B, and the hose joint 44 is screwed to them. A hose connected to the hose joint 44 of the first opening 43A is connected to a discharge port of a pump (not shown), while a hose connected to the hose joint 44 of the second opening 43B is a drain tank (not shown). It is connected to the. Then, the pump sucks the coolant liquid (for example, water, oil) in the drain tank, discharges it toward the first opening 43A of the flow path 43, and is discharged from the second opening 43B of the flow path 43. The liquid returns to the drain tank.

  The punch cooler 40 is manufactured using the additive manufacturing method conceptually shown in FIG. The additive manufacturing method is a method of laminating a granular material layer 93 that is a layer of a granular material softened by heating, such as a metal or a thermoplastic resin, and for each granular material layer 93, only the granular material at a predetermined location is laminated. These are integrated into a product component layer 94 by irradiation with laser light from a laser oscillator 92, and such a product component layer 94 is laminated to manufacture a layered product.

  In the present embodiment, for example, the maraging steel powder particle layer 93 is laminated, and the plurality of punch coolers 40 are manufactured at a time in a side-by-side arrangement. Here, since the punch cooler 40 has a complicated shape having a flow path 43 and the like inside, it is extremely difficult to manufacture the punch cooler 40 by machining. Moreover, since the punch cooler 40 is not a mass-produced product, the cost increases when manufactured by casting. On the other hand, if the punch cooler 40 is manufactured by the additive manufacturing method as in the present embodiment, it can be manufactured easily and inexpensively. Further, the shapes of the plurality of punch coolers 40 are slightly different depending on the difference in the shapes of the plurality of punches 20. This can be dealt with by slightly changing the program for controlling the position of the laser oscillator 92. In addition, since there is no great difference in the height of the plurality of punch coolers 40, when the plurality of punch coolers 40 are manufactured side by side, the amount of powder particles that do not become the punch coolers 40 can be reduced, and the yield is improved. .

  In addition, you may manufacture the punch cooler 40 with metals other than maraging steel. In particular, a punch cooler that does not slidably contact the finger 17 of the transfer device 16 as in the second embodiment described later, or a punch cooler that does not contact the workpiece 90 as in the third embodiment uses a metal with low hardness. It is preferable to reduce the material cost.

  FIG. 10 shows a control configuration of the press 10. As described above, three temperature sensors 24S built in each punch 20 are connected to the detection circuit 80 provided in the controller 82 of the press machine 10, and the output of the detection circuit 80 (that is, the detection result by the temperature sensor 24S). ) Is taken into the CPU 83 through the interface circuit 81 such as an amplifier or an A / D converter at a predetermined cycle (for example, 0.5 to 1 second). Then, the abnormality detection unit 84 and the balance determination unit 85 configured by the CPU 83 executing the control program perform the following processing.

  The abnormality detection unit 84 takes in the detection results of all the temperature sensors 24S, and turns on a warning lamp 86A provided in the notification device 86 when any detection result becomes higher than a preset upper limit warning value. To do. When the detection result of any of the temperature sensors 24S becomes higher or lower than the preset upper limit abnormal value and lower limit abnormal value, the abnormal lamp 86B provided in the notification device 86 is turned on, The sorting device 99 is controlled so that the press product is discharged to the chute for the NG product, and the motor drive circuit 70C is controlled so as to stop the motor 70 (see FIG. 1). Note that the cause of the abnormally low detection result of the temperature sensor 24S may be a failure or disconnection of the temperature sensor 24S.

  The balance determination unit 85 takes in only the temperature sensor 24S at the tip of each punch 20. Then, the average calculation unit 85A calculates the average value of the detection results of each temperature sensor 24S every predetermined time (for example, 1 to 10 seconds), and the change amount calculation unit 85B detects the detection results of each temperature sensor 24S. The amount of change per unit time (for example, 0.5 to 1 second) of the average value is calculated. Then, the comparison calculation unit 85C compares the change amount of the average value of the detection result of each temperature sensor 24S with a preset reference change amount, and changes the average value of the detection result of any one of the temperature sensors 24S. When the amount is larger than the reference change amount, it is determined that the temperature of any of the punches 20 is not in an equilibrium state, and the sorting device 99 is controlled so that the press product is discharged to the chute for the NG product. . Further, when the change amount of the average value of the detection results of all the temperature sensors 24S is equal to or less than the reference change amount, it is determined that the temperatures of all the punches 20 are in an equilibrium state, and the press product is for an OK product. The sorting device 99 is controlled so as to be discharged to the chute.

  This completes the description of the configuration of the press machine 10 of the present embodiment. Next, operation | movement of this press machine 10 is demonstrated. When the press machine 10 is started, the coolant liquid is fed to the punch coolers 40 of all the processing stages. The ram 12 repeatedly moves up and down, and the punch cooler 40 and the transfer device 16 operate in conjunction with the ram 12 as follows to press the workpiece 90 a plurality of times to produce a container that is a pressed product. To go.

  Specifically, as shown in FIG. 4, when the punch 20 is located at the top dead center, the punch cooler 40 is located at the relative lower limit position. At this time, the transfer device 16 is positioned at the right end of the movable range in the lateral direction H1, and the workpiece 90 held by the pair of fingers 17 is disposed above the die 30. Then, the punch cooler 40 descends at the same speed as the punch 20 until the punch 20 is lowered toward the bottom dead center, and the lowering speed becomes slower than the punch 20 from the middle and is relatively upward with respect to the punch 20. Moving. Then, the punch 20 protrudes below the punch cooler 40 and enters the workpiece 90, and the punch cooler 40 enters between the pair of fingers 17 with a slight delay. As a result, the space between the pair of fingers 17 is expanded, and in this state, the fingers 17 begin to move to the left.

  Thereafter, the punch cooler 40 is brought into a stationary state, and the punch 20 is further lowered to move the punch cooler 40 to the relative upper limit position with respect to the punch 20 as shown in FIG. Then, the workpiece 90 is pushed into the forming hole 31 by the punch 20 and the pressing process is completed. In the meantime, the pair of fingers 17 approaching the punch cooler 40 from the right side is slidably brought into contact with the punch cooler 40 to be expanded. Thereafter, the punch 20 rises together with the knockout pin 33 and the workpiece 90 is discharged from the forming hole 31. At this time, the punch cooler 40 rises at a slower speed than the punch 20 and moves to a position where it does not interfere with the pair of fingers 17 and stops. Thereby, the workpiece 90 is discharged from the forming hole 31 and is held by the pair of fingers 17. Further, when the punch 20 is further raised, the work 90 comes into contact with the punch cooler 40 and the upward movement is restricted, and the punch 20 is detached from the work 90. That is, the punch cooler 40 functions as a stripper that extracts the workpiece 90 from the punch 20. Thereafter, the punch cooler 40 is raised at the same speed as the punch 20 in a state where the punch cooler 40 is positioned at the relative lower limit position, the punch 20 reaches the top dead center, returns to the original state, and thereafter the same operation is repeated. It is. In this manner, the workpiece 90 is pressed in a state where the punch 20 is cooled by the punch cooler 40, and a press product is manufactured.

Here, the heat generation amount of the punch 20 increases as the operating speed of the press machine 10 increases. On the other hand, in the press machine 10 according to the present embodiment, the punch cooler 40 in which the coolant liquid flows inside can be fitted to the punch 20 and relatively moved to cool the heat generating portion of the punch 20. Thereby, the restriction | limiting of the magnitude | size of the flow path 43 is relieve | moderated compared with the past, a cooling performance can be raised, and the operation speed can be raised compared with the former and productivity can be made high. Further, when the press machine 10 is operated at the same operation speed as the conventional one, the time from the start of the press machine 10 until the temperature of the punch 20 reaches the equilibrium state is shortened, and the number of NG products is reduced. Can be high .

  Moreover, the flow path of the punch 20 can be eliminated by the punch cooler 40, and the temperature sensor 24 </ b> S can be incorporated in the inside of the punch 20 having a higher degree of freedom. And the trouble at the time of starting of the press machine 10 is reduced as follows by monitoring the temperature of the punch 20.

  That is, the temperature of the punch 20 continues to rise immediately after the press machine 10 is started, and the shape of the pressed product is not stable until it reaches an equilibrium state. On the other hand, the press 10 of the present embodiment automatically determines whether or not the temperature of the punch 20 is in an equilibrium state, and discharges the press product to a chute for an NG product until the equilibrium state is reached. When the equilibrium state is reached, the press product is discharged to the chute for the OK product. As described above, since the press machine 10 according to the present embodiment automatically switches between the NG product and the OK product during the period from the start to the steady operation, the labor at the time of starting the press machine 10 is reduced. . In addition, when manually switching between the NG product and the OK product, the shape of the press product can be easily managed by managing the temperature of the punch 20, so that the labor at the time of starting the press machine 10 is reduced.

  Further, the tip of the punch 20 generates the most heat. On the other hand, in the press machine 10 of the present embodiment, the tip of the punch 20 is located inside the punch cooler 40 at the top dead center of the punch 20 and the punch cooler 40 is moved in the same direction as the punch 20 is moving. Since it moves and the front-end | tip part of the punch 20 is maintained inside the punch cooler 40, the front-end | tip part of the punch 20 is cooled over a long time, and cooling efficiency improves.

  Further, since the punch cooler 40 has a sleeve shape, the periphery of the punch 20 including the punch cooler 40 becomes compact. Moreover, since the punch cooler 40 also serves as a stripper for detaching the workpiece 90 from the punch 20, the punch cooler 40 is more compact than those provided separately. Moreover, since the important point cooling part 42 on the front end side of the punch cooler 40 has a flat shape that easily radiates heat, the cooling performance is improved. Thereby, the front-end | tip part of the punch 20 can be cooled efficiently.

  Further, since the punch cooler 40 is made of maraging steel, the hardness can be increased as compared with carbon steel, carbide and the like that are normally used, and durability can be improved. Although it is difficult to process the maraging steel, the punch cooler 40 of the maraging steel can be easily manufactured by using the layered manufacturing method.

[Second Embodiment]
Hereinafter, with reference to FIG. 11 and FIG. 12, the press machine 10A of 2nd Embodiment is demonstrated. The press machine 10A of the present embodiment is provided with a punch cooler 50 that is common to the punches 20 of some of the plurality of processing stages on the side of the subsequent process.

  The punch cooler 50 has a rectangular parallelepiped shape extending in the horizontal direction H1, and includes a plurality of punch through holes 51 through which the plurality of punches 20 penetrate at a plurality of locations in the longitudinal direction. Further, the punch cooler 50 is formed in a state in which a flow path 52 is wound around the whole of the plurality of punch through holes 51, and both end portions of the flow path 52 are opened to one end face of the punch cooler 50. Yes. Then, the coolant liquid flows from one end of the flow path 52 to the other end.

  The punch cooler 50 includes a plurality of pairs of leg portions 53 (corresponding to “cooler support portions” in the claims) that project in the front-rear direction H2 and bend downward. The leg portions 53 are fixed to the upper surface of the die holder 15, and the transfer device 16 moves below the punch cooler 50. The transfer device 16 is provided with an air cylinder 16V as a drive source for opening and closing between the pair of rails 16A.

  The press machine 10A of the present embodiment operates as follows. That is, when the workpiece 90 is discharged from the forming hole 31, the pair of fingers 17 is closed by the air cylinder 16V when the workpiece 90 comes into contact with the lower surface of the punch cooler 50. When the punch 20 is detached from the workpiece 90, the rail 16A moves to the right side and moves the workpiece 90 to the processing stage adjacent to the right side. Then, the punch 20 is lowered to push the work 90 into the forming hole 31.

  Even if the punch cooler 50 is fixed like the press machine 10A of the present embodiment, the punch 20 can be cooled. Further, since the punch cooler 50 is fixed, it becomes easy to supply the coolant liquid. In addition, since the punch cooler 50 is shared by the plurality of punches 20, the number of parts can be reduced, and the entire press 10 can be made compact. Moreover, since the flow path 52 is formed so as to wind the whole of the plurality of punch through holes 51, the number of the entrances and exits of the flow path 52 can be reduced, and the coolant liquid is supplied to the punch cooler 50. The pipe is simplified.

[Third Embodiment]
Hereinafter, with reference to FIG. 13, the press machine 10B of 3rd Embodiment is demonstrated. The press machine 10B of the present embodiment is a modification of the press machine 10A of the second embodiment, and the finger 17 of the transfer device 16 is provided with a locking claw 17T, and the finger 17 also serves as a stripper. That is, the pair of fingers 17 are closed while the workpiece 90 is being discharged from the forming hole 31, and the locking claws 17 </ b> T are locked to the upper surface of the workpiece 90. In this state, the punch 20 rises and the punch 20 is detached from the workpiece 90. The press machine 10B of the present embodiment provides the same operational effects as the second embodiment.

[Other Embodiments]
(1) In the first embodiment, the punch cooler 40 is manufactured by the layered manufacturing method. However, for example, the punch cooler may be divided into a plurality of parts and manufactured by shaving. Further, for example, when the punch cooler can be mass-produced, the punch cooler may be manufactured by casting. In that case, the flow path of the punch cooler may be formed with a sand-type core.

  (2) The press machines 10, 10A, and 10B of the first to third embodiments are so-called transfer press machines having the transfer device 16, but the press machine or the work machine that only punches the workpiece from the sheet metal. A press cooler may be provided in a press machine that performs press molding only once. In the transfer press machine, the punch is often thin and long, and it is often difficult to form a flow path in the punch. Therefore, the effect of providing the transfer cooler with the punch cooler is great.

  (3) The workpiece 90 of the first embodiment has a cylindrical shape, but is not limited thereto, and may be, for example, a rectangular parallelepiped shape, an elliptical shape, or an irregular shape.

  (4) In the first embodiment, the flow path is not formed in the punch. However, the punch is provided with a flow path for the coolant liquid on the punch and the press is further improved in cooling performance. The operating speed of the machine may be further increased.

  (5) Although the cooler support portion (support lever 19) that supports the punch cooler 40 in the first embodiment is driven by the ram 12 and the drive source (motor 70), it is driven by another drive source. It may be. Further, the drive mechanism of the punch cooler is not limited to the cam / lever mechanism described in the first embodiment. For example, a rack and pinion mechanism, a ball screw mechanism, or a combination of these with a lever mechanism or the like. Various mechanisms are possible.

  (6) In the first embodiment, the punch cooler 40 is provided in all the processing stages. However, the shape change of the workpiece 90 due to the thermal deformation of the punch 20 affects the product shape as the processing stage is closer to the final process. Therefore, only the final processing stage or a plurality of processing stages on the final processing side may be provided with the punch cooler 40.

  (7) Although the punch cooler 50 of the second and third embodiments is provided with the flow path 52 common to the plurality of punch through holes 51, a separate flow path may be provided for each punch through hole. . Moreover, you may fix a sleeve-shaped punch cooler to a die holder or a bolster like 1st Embodiment. Furthermore, like the punch cooler 50 of the second and third embodiments, a punch cooler common to a plurality of punches may be supported so as to be movable up and down like the punch cooler 40 of the first embodiment.

10, 10A, 10B Press 16 Transfer device 19 Support lever (cooler support)
20 punch 24A, 24B, 24C sensor accommodation hole 24S temperature sensor 30 die 40, 50 punch cooler 41 base part 42 priority cooling part 43, 52 flow path 49, 51 punch through hole 53 leg part (cooler support part)
85 Equilibrium judgment part 90 Workpiece (container)

Claims (13)

A punch cooler having a punch through-hole through which the punch passes, and cooling the punch; and
A flow path formed in the punch cooler and for indirectly cooling the punch via the punch cooler flows without touching the punch; and
And a cooler support portion that supports the punch cooler so as to move relative to the punch.   2. The press according to claim 1, wherein the cooler support portion supports the punch cooler so that a tip end portion of the punch is positioned in the punch through hole at a top dead center of the punch.   The said cooler support part moves the said punch cooler in the same direction as the movement direction during the movement of the said punch, and maintains the state which located the front-end | tip part of the said punch in the said punch through-hole. 2. Press according to 2. The cooler support portion fixes the punch cooler,
The press machine according to claim 1 or 2, wherein the punch cooler moves relative to the punch by the direct movement of the punch. The punch forms a workpiece into a cylindrical shape,
The press machine according to any one of claims 1 to 4, wherein the punch cooler also serves as a stripper for detaching the workpiece from the punch. A plurality of the punches are arranged in a line to form a workpiece into a cylindrical shape,
A transfer device that intermittently conveys the workpiece in the direction in which the plurality of punches are arranged;
The press machine according to any one of claims 1 to 5, wherein the punch cooler is provided on all or some of the plurality of punches.   The press machine according to any one of claims 1 to 6, wherein the punch cooler is provided for each punch in a sleeve shape.   The press machine according to any one of claims 1 to 6, wherein the punch cooler has a plurality of punch through holes and is provided in common to the plurality of punches. The punch cooler has a step portion in the middle of the axial direction of the punch,
Of the punch cooler, the base end side of the stepped portion is supported by the cooler support portion and forms a base portion having openings at both ends of the flow path, while the tip end side of the stepped portion is in the axial direction. The press machine according to any one of claims 1 to 8, wherein the pressurizing cooling unit is flat in a direction orthogonal to each other.   The press according to any one of claims 1 to 9, further comprising a sensor housing hole formed in the punch and a temperature sensor housed in the sensor housing hole.   The press according to claim 10, further comprising an equilibrium determination unit that determines whether or not the temperature of the punch is in an equilibrium state based on a detection result of the temperature sensor.   The manufacturing method of the press machine component which manufactures the said punch cooler of the press machine of any one of Claims 1 thru | or 11 with the additive manufacturing method which uses maraging steel.   The manufacturing method of the container which manufactures a container using the press machine of any one of Claims 1 thru | or 11.