JP6093380B2 - Pressurizing device and pressurizing method - Google Patents

Description

  The present invention relates to a pressurizing apparatus and a pressurizing method suitable for appropriately pressurizing a metal plate or the like.

  Molds and the like are subjected to heat treatment such as quenching and tempering for the purpose of obtaining necessary hardness and toughness after machining the steel material. At that time, even if the heat treatment conditions are optimized, the occurrence of distortion such as a shape change cannot be avoided. Therefore, as shown in FIG. 5, the inventor of the present application presses the plate-like workpiece 10 (mold, etc.) disposed on the workpiece mounting surface 21x of the table 2x entirely with the pressing head 3x, thereby causing distortion. We are considering removing it. However, in the configuration shown in FIG. 5, when a load is applied from the pressure shaft 4x to the pressure head 3x and the load is transmitted in the thickness direction of the pressure head 3x, the load is applied at the pressurization location by the pressure shaft 4x. Therefore, it is difficult to pressurize the entire surface of the workpiece 10 with an appropriate load. That is, in the pressurizing head 3x, the load is transmitted in parallel to the pressurizing direction by the pressurizing shaft 4x as indicated by the arrow P1 from the pressurizing portion by the pressurizing shaft 4x, and as indicated by the arrow P2. Since the pressure is transmitted in a direction oblique to the pressurizing direction by the pressurizing shaft 4x, the load applied in the thickness direction of the work 10 is smaller at the end of the pressurizing head 3x than at the center of the pressurizing head 3x. turn into.

  On the other hand, with respect to the pressure device, a total of six pressure shafts are arranged at equal intervals in 3 rows × 2 rows, and by pressurizing the pressure head while independently controlling these pressure shafts, There has been proposed a pressurizing apparatus that attempts to pressurize the work evenly (see Patent Document 1).

JP 2000-343287 A

  However, as in the configuration described in Patent Document 1, simply increasing the number of pressure shafts and increasing the number of transmission points of the pressurizing head cannot press the entire surface of the work properly. There is. That is, when the pressure shaft is increased, loads (loads indicated by arrows P1 and P2 in FIG. 5) transmitted in each direction from the pressure points by the plurality of pressure shafts are added to each portion of the pressure head. Since a load is applied, the control of each pressing force of a plurality of pressurizing shafts becomes considerably complicated. If this control is mistaken, the balance of the pressing force on the workpiece is adversely affected.

  In view of the above problems, an object of the present invention is to provide a pressurizing apparatus and a pressurizing method capable of appropriately pressurizing the entire surface of a workpiece.

In order to solve the above problems, a pressure device according to the present invention includes a table provided with a work placement surface, a pressure head facing the work placement surface, and the center of the pressure head from the back side. A main pressure shaft that pressurizes toward the work placement surface; and a plurality of sub pressure shafts that press the back side of the pressure head toward the work placement surface around the main pressure shaft; pressurized condition by the main pressing axis, and possess a control unit for controlling the pressurized condition by the plurality of sub-pressure application shaft, the pressure head is first plate facing the workpiece placement surface A second plate that faces the first plate on the back side and is pressurized from the back side by the main pressure shaft and the plurality of sub pressure shafts, and the second plate and the first plate. characterized in that it has a connecting shaft of the plurality of connecting

The present invention is also a pressurizing method in which a work is placed on a work placement surface of a table and then the work is pressurized by a pressure head, and the center of the pressure head is placed from the back side on the work placement. A main pressure shaft that pressurizes toward the surface, and a plurality of sub pressure shafts that press the back side of the pressure head toward the work placement surface around the main pressure shaft, and The pressure head is opposed to the first plate facing the workpiece mounting surface and the first plate on the back side,
A second plate that is pressurized from the back side by the main pressure shaft and the plurality of sub pressure shafts; and a plurality of connecting shafts that connect the second plate and the first plate. The pressure head is pressed toward the work by the main pressure shaft, and the pressure head is pressed toward the work by the plurality of sub pressure shafts.

In the present invention, when the main pressure shaft presses the center of the pressure head from the back side, a large load is applied to the center of the work, while a small load is applied to the end of the work. Since the sub pressure shaft pressurizes the pressure head from the back side around the main pressure shaft, the balance of the load at the center and the end of the workpiece can be optimized. Therefore, the entire surface of the workpiece can be appropriately pressurized, such as being able to pressurize the entire surface of the workpiece evenly. In addition, since the load balance when the workpiece is pressurized by the main pressure axis is corrected by the multiple pressure axes, settings such as the pressure on the main pressure axis and the pressure on the sub pressure axis are set. Is easy. The pressure head is a first plate facing the workpiece placement surface, a second plate facing the first plate on the back side, and being pressed from the back side by the main pressure shaft and the plurality of sub pressure shafts. Since the plate and the plurality of connecting shafts that connect the second plate and the first plate are provided, the load received by the second plate can be properly transmitted to the first plate. Further, since the first plate on the workpiece side and the second plate on the pressing shaft side are connected by a plurality of connecting shafts, the thermal conductivity between the first plate and the second plate is reduced. Can do.

  In the present invention, it is preferable that the main pressure shaft has a larger diameter than the sub pressure shaft. According to such a configuration, since the area where the pressurizing force is transmitted from the main pressurizing shaft to the pressurizing head is wide, the pressurizing force of the main pressurizing shaft is sufficiently transmitted to the end portion of the workpiece. Accordingly, since the area to be corrected by the pressurizing force by the sub pressurizing shaft becomes narrow, it is easy to set the pressurizing force by the subpressurizing shaft.

  In the present invention, it is preferable that the sub pressure shaft is arranged at each of positions corresponding to four corners of a virtual rectangle or square centered on the main pressure shaft. According to such a configuration, the entire surface of the workpiece can be appropriately pressurized by a small number of sub-pressurizing shafts.

  In the present invention, it is preferable that the control unit controls the pressing force of the main pressurizing shaft to be larger than the pressing force of the sub pressurizing shaft. According to this configuration, a large load is applied to the work by the main pressure shaft, and the balance of the load applied to the work by the main pressure shaft is corrected by the plurality of sub pressure shafts. , And the setting of the pressurizing force of the sub-pressurizing shaft is easy.

  In the present invention, the control unit employs a configuration in which after the main pressure shaft starts to press the pressure head, the plurality of sub pressure shafts start to press the pressure head. be able to. According to such a configuration, it is easy to apply a large load to the workpiece by the main pressure shaft and correct the balance of the load applied to the workpiece by the main pressure shaft by the plurality of sub pressure shafts.

  In the present invention, a lower end portion of the main pressure shaft is connected to and integrated with a back side of the pressure head, and lower end portions of the plurality of sub pressure shafts are divided with the pressure head. Preferably it is. According to such a configuration, it is easy to start pressurization of the pressurization heads to the plurality of sub pressurization shafts after starting pressurization of the pressurization head to the main pressurization shaft.

  In the present invention, each of the pressure head and the table is preferably provided with a temperature adjusting device.

  In the present invention, for example, a plate-shaped workpiece is disposed on the workpiece mounting surface.

It is explanatory drawing which shows the structural example of the metal mold | die as a steel workpiece | work with which this invention is applied. It is explanatory drawing of the pressurization apparatus to which this invention is applied. It is explanatory drawing of the pressurization method to which this invention is applied. It is explanatory drawing of the effect to which this invention is applied. It is explanatory drawing of a general pressurization apparatus.

  Embodiments of the present invention will be described with reference to the drawings. In the following description, a machined mold will be described as an example of a steel workpiece.

(Specific examples of work)
FIG. 1 is an explanatory view showing a configuration example of a mold as a steel workpiece to which the present invention is applied. As shown in FIG. 1, in this embodiment, a steel mold used as the workpiece 10 is a plate shape in which holes such as a circular hole 10a and a rectangular hole 10b are formed by machining, and the workpiece 10 ( The mold is subjected to heat treatment such as quenching and tempering. Further, since the entire surface of the workpiece 10 is appropriately pressed by a pressing device and a pressing method described below, the distortion is corrected. For example, in the workpiece 10 having a length of 400 mm, a width of 200 mm, and a thickness of 15 mm, the distortion d1 is corrected to about 0.03 mm.

(Pressure device)
FIG. 2 is an explanatory view of a pressurizing apparatus to which the present invention is applied. FIGS. 2A and 2B are explanatory views showing a main part of the pressurizing apparatus and an explanation showing a planar structure of the pressurizing head. FIG.

  In FIG. 2, the pressurizing apparatus 1 according to the present embodiment includes a table 2 provided with a work placing surface 21, a pressure head 3 facing the work placing surface 21, and the center of the pressure head 3 from the back side. One main pressure shaft 4 that pressurizes toward the mounting surface 21, and a plurality of sub pressures that press the back side of the pressure head 3 toward the workpiece mounting surface 21 around the main pressure shaft 4. And a shaft 5. Further, the pressurizing apparatus 1 has a control unit 6 that controls the pressurizing condition by the main pressurizing shaft 4 and the pressurizing condition by the plurality of sub pressurizing shafts 5. A main pressure axis controller 61 for controlling the pressure conditions (load and vertical position) by the shaft 4 and a sub pressure axis controller for controlling the pressure conditions (load and vertical position) by the sub pressure axis 5 62. In this embodiment, the main pressurizing shaft 4 is configured as a piston rod of the fluid pressure cylinder device 40, and the main pressurizing shaft controller 61 controls the supply of fluid to the fluid pressure cylinder device 40. The sub pressurizing shaft 5 is configured as a piston rod of the fluid pressure cylinder device 50, and the sub pressurizing shaft controller 62 controls the supply of fluid to the fluid pressure cylinder device 50. Here, since the sub pressurizing shaft control unit 62 is configured as a common control unit for the plurality of fluid pressure cylinder devices 50, the plurality of sub pressurizing shafts 5 operate under the same pressurizing condition. . On the other hand, the sub pressurizing shaft control unit 62 may be provided in a one-to-one relationship with the plurality of fluid pressure cylinder devices 50. In this case, the pressurizing conditions of the plurality of sub pressurizing shafts 5 are set. It can be controlled independently. In this embodiment, the fluid pressure cylinder device 50 is configured to have a one-to-one relationship with the plurality of sub pressurization shafts 5. It may be configured as a common fluid pressure cylinder device. In this case, the plurality of sub pressure shafts 5 operate under the same pressure condition.

  In the pressure device 1 of the present embodiment, the workpiece 10 and the workpiece placement surface 21 have a rectangular planar shape, and the pressure head 3 also has a rectangular planar shape such as a rectangle or a square according to the shape. ing. The sub pressure shafts 5 are arranged at positions corresponding to four corners of a virtual rectangle or square centered on the main pressure shaft 4, and the number of the sub pressure shafts 5 is four. When the sub pressure shafts 5 are arranged at positions corresponding to four corners of a virtual rectangle centered on the main pressure shaft 4, the four sub pressure shafts 5 are connected to the main pressure shaft 4. Are arranged at equidistant positions. On the other hand, when the sub pressure shafts 5 are arranged at positions corresponding to four corners of a virtual square centered on the main pressure shaft 4, the four sub pressure shafts 5 are They are arranged at equidistant positions and equiangular intervals from the main pressing shaft 4. The main pressure shaft 4 has a larger diameter than the sub pressure shaft 5.

  The lower end portion of the main pressure shaft 4 is connected to and integrated with the back side of the pressure head 3. On the other hand, the lower end portions of the plurality of sub pressure shafts 5 are divided from the pressure head 3. The pressure head 3 includes a first plate 31 that faces the workpiece placement surface 21, a second plate 32 that faces the first plate 31 on the back side, and a plurality of plates that connect the second plate 32 and the first plate 31. The second plate 32 is pressurized from the back side by the main pressure shaft 4 and the plurality of sub pressure shafts 5. For this reason, the lower end portion of the main pressure shaft 4 is connected to and integrated with the back side of the second plate 32 of the pressure head 3. In this embodiment, the connection shaft 33 is provided with a total of 16 rows of 4 rows × 4 rows. However, the number of connecting shafts 33 may be set to a number greater than 4 columns × 4 columns or a number smaller than 4 columns × 4 columns.

  In this embodiment, the first plate 31 of the pressure head 3 is provided with a temperature adjustment device 30 having a heating function 301 and a cooling function 302, and the table 2 also has a temperature adjustment having a heating function 201 and a cooling function 202. A device 20 is provided. Although various devices can be used as the temperature control devices 20 and 30, in this embodiment, a flow path is formed inside the table 2 and the first plate 31, and a fluid such as water or oil is provided in the flow path. The structure which passes is adopted. In the temperature control devices 20 and 30, the workpiece 10 can be heated by passing the heated fluid through the flow paths of the table 2 and the first plate 31, and the cooling is performed in the flow paths of the table 2 and the first plate 31. The workpiece | work 10 can also be cooled by letting the done fluid pass. Moreover, it is preferable to implement | achieve the heating functions 201 and 301 of the temperature control apparatuses 20 and 30 with a heater, In this case, the workpiece | work 10 can be heated to high temperature.

  The second plate 32 of the pressure head 3 is provided with a cooling device 320. When the first plate 31 is heated or when the heated workpiece 10 is pressurized, the first plate 31 is heated. The heat of the plate 31 and the workpiece 10 is not easily transmitted to the fluid pressure cylinder device 40 or the fluid pressure cylinder device 50. Further, a heat insulating plate 7 is disposed between the pressurizing head 3 and the main body portions of the fluid pressure cylinder devices 40 and 50, and the main pressurizing shaft 4 and the sub pressurizing shaft 5 are respectively connected to the plate 7. It can be moved up and down while passing through the hole 70. In this embodiment, the cooling device 75 is built in the plate 7, and when the pressure head 3 is heated or when the heated workpiece 10 is pressurized, the heat of the pressure head 3 or the workpiece 10 is increased. The heat is not easily transmitted to the fluid pressure cylinder device 40 or the fluid pressure cylinder device 50.

(Pressurization method)
3 is an explanatory diagram of a pressurizing method to which the present invention is applied. In FIG. 3, FIG. 3 (a) is an explanatory diagram showing a state in which pressurization is started by the main pressurizing shaft 4. FIG. (B) is an explanatory view showing a state in which pressurization is started by the sub pressurization shaft 5.

  In this embodiment, as shown in FIG. 2A, the workpiece 10 in which the circular hole 10a, the rectangular hole 10b, and the like are formed is placed on the workpiece placement surface 21 of the table 2.

  Next, the pressure head 3 is pressed toward the work 10 by the main pressure shaft 4, and the pressure head 3 is pressed toward the work 10 by the plurality of sub pressure shafts 5, and the work 10 is pressed by the pressure head. Pressurize with 3. At that time, as shown in FIG. 3A, the control unit 6 (see FIG. 2) lowers the main pressurizing shaft 4 and starts pressurization by the main pressurizing shaft 4, and then, FIG. As shown in FIG. 2, the plurality of sub pressure shafts 5 are moved down and pressurization by the sub pressure shafts 5 is started. Here, the control unit 6 performs control so that the pressurizing force of the main pressurizing shaft 4 is larger than the pressurizing force of the sub pressurizing shaft 5. In addition, the control unit 6 controls the pressure applied to the four sub pressurizing shafts 5 to be equal.

  After holding such a state for a certain period of time, the sub pressure shaft 5 is raised, the main pressure shaft 4 and the pressure head 3 are raised, and then the workpiece 10 is taken out.

  Since the table 2 and the pressure head 3 are provided with temperature control devices 20 and 30, when the work 10 is pressurized, the table 2 and the pressure head 3 are heated or cooled to The temperature may be adjusted.

(Displacement for each part when the workpiece 10 is pressurized)
FIG. 4 is an explanatory diagram of the effect of applying the present invention. In FIG. 4, FIG. 4 (a) is an explanatory diagram of a model for analyzing displacement for each part when the work 10 is pressurized in the pressurizing apparatus 1 to which the present invention is applied, and FIG. 4 (b). (E) is explanatory drawing which shows the result of having simulated the displacement distribution at the time of pressurizing the workpiece | work 10 on various conditions based on an elastic analysis model. Here, FIG. 4B is an explanatory view showing a simulation result under the first reference condition in which the pressure is applied only by the main pressure shaft 4, and FIG. 4C is a first pressure to which the present invention is applied. FIG. 4D is an explanatory view showing a simulation result under a second pressurizing condition to which the present invention is applied, and FIG. 4E is a sub pressurizing state. It is explanatory drawing which shows the simulation result on the 2nd reference condition pressurized only with the axis | shaft 5. FIG. 4 (b) to 4 (e), the displacement amount of each part is indicated by a contour line of the height position after pressurization, max indicates a part farthest from the table 2, and min indicates the part in the table 2 The closest part is shown. In addition, as for the displacement amount, − is attached to the displacement toward the table 2 side, and + is attached to the displacement toward the opposite side to the table 2 side.

  In evaluating the effect of the present invention, as shown in FIG. 4A, the flat pressure head 3 is pressed by the main pressure shaft 4 and the sub pressure shaft 5 and pressed to the flat work 10. We used a model that performs Here, all of the table 2, the pressure head 3 and the work 10 were made of steel having a Young's modulus of 200 GPa, and the Poisson's ratio was set to 0.3. The size of the pressure head 3 is 450 mm (length) × 450 mm (width) × 50 mm (thickness), and the size of the workpiece 10 is 400 mm (length) × 300 mm (width) × 20.5 mm (thickness). . The main pressure shaft 4 was 100 mm (diameter) × 50 mm (length), and the sub-pressure shaft 5 was 50 mm (diameter) × 50 mm (length). The main pressure shaft 4 and the sub pressure shaft 5 were both made of steel having a Young's modulus of 1000 GPa and the Poisson's ratio was set to 0.3.

  Moreover, the displacement amount of the workpiece | work 10 was calculated | required on all the conditions shown to FIG.4 (b)-(e), making the total load P by the main pressurization shaft 4 and the sub pressurization shaft 5 constant.

  In this evaluation result, as shown in FIG. 4B, when the load P1 to the main pressure shaft 4 is P and the load P2 to the sub pressure shaft 5 is 0, the minimum displacement is The maximum value of the displacement was +15.5 μm at the corner of the workpiece 10, and the difference was 40.1 μm.

  As shown in FIG. 4C, when the load P1 to the main pressure shaft 4 is (1/2) P and the load P2 to the sub pressure shaft 5 is (1/8) P per one. The minimum value of displacement is −14.1 μm at the corner of the workpiece 10, while the maximum value of displacement is +2.52 μm at the center of the side of the workpiece 10, and the difference is 16.62 μm. .

  As shown in FIG. 4D, when the load P1 to the main pressure shaft 4 is (1/4) P and the load P2 to the sub pressure shaft 5 is (3/16) P per one. The minimum value of displacement is −23.0 μm at the corner of the workpiece 10, while the maximum value of displacement is +3.18 μm at the center of the side of the workpiece 10, and the difference is 26.18 μm. .

  As shown in FIG. 4 (e), when the load P1 to the main pressure shaft 4 is 0 and the load P2 to the sub pressure shaft 5 is (1/4) P per one, the minimum value of displacement Is −34.1 μm at the corner of the workpiece 10, while the maximum displacement is +11.4 μm at the center of the side of the workpiece 10, and the difference is 45.5 μm.

  Therefore, when the main pressurizing shaft 4 presses the center of the pressurizing head 3 from the back side as in the pressurizing conditions shown in FIGS. If the pressure head 3 is pressurized around the main pressure shaft 4 from the back side, the load balance at the center and the end of the workpiece 10 can be optimized.

  Also, among the pressurization conditions shown in FIGS. 4C and 4D, the load P <b> 1 to the main pressurization shaft 4 and the sub pressurization shaft 5 as in the pressurization conditions shown in FIG. When the sum of the loads P2 is equal, the balance of loads at the center and the end of the workpiece 10 can be more effectively optimized.

(Main effects of this form)
As described above, in this embodiment, when the main pressurizing shaft 4 presses the center of the pressurizing head 3 from the back side, a large load is applied to the center of the workpiece 10 as described with reference to FIG. On the other hand, a small load is applied to the end of the workpiece 10. However, in this embodiment, since the plurality of sub pressurizing shafts 5 pressurize around the main pressurizing shaft 4 from the back side of the pressurizing head 3, the balance of the load at the center and the end of the work 10 is corrected to be appropriate. Can be Therefore, the entire surface of the workpiece 10 can be appropriately pressurized, for example, the entire surface of the workpiece 10 can be uniformly pressed. In addition, the load balance when the work 10 is pressurized by the main pressure shaft 4 is corrected by the plurality of sub pressure shafts 5. For this reason, the pressurizing force required for the workpiece 10 is set by the pressurizing force of the main pressurizing shaft 4, and the sub pressurizing shaft 5 is corrected so as to correct the balance of the load generated by the pressurizing force of the main pressurizing shaft 4. What is necessary is just to set the pressurizing force. Therefore, it is easy to set the pressurizing force of the main pressurizing shaft 4 and the pressurizing force of the sub pressurizing shaft 5.

  Moreover, since the sub pressurization axis | shaft 5 is arrange | positioned in each of the position equivalent to four corners of the virtual rectangle or square centering on the main pressurization axis | shaft 4, with a small number of sub pressurization axis | shafts 5, The entire surface of the workpiece 10 can be appropriately pressurized.

  The main pressure shaft 4 has a larger diameter than the sub pressure shaft 5. For this reason, since the area where the pressurizing force is transmitted from the main pressurizing shaft 4 to the pressurizing head 3 is wide, the pressurizing force of the main pressurizing shaft 4 is sufficiently transmitted to the end portion of the workpiece 10. Therefore, it is easy to set the pressurizing force by the sub pressurizing shaft 5. Further, the control unit 6 performs control so that the pressurizing force of the main pressurizing shaft 4 is larger than the pressurizing force of the sub pressurizing shaft 5. The control unit 6 causes the main pressure shaft 4 to start pressing the pressure head 3 and then causes the plurality of sub pressure shafts 5 to start pressing the pressure head 3. For this reason, a large load is applied to the workpiece 10 by the main pressure shaft 4, and the balance of the load applied to the workpiece 10 by the main pressure shaft 4 is corrected by the plurality of sub pressure shafts 5. Setting of the pressing force of the pressure shaft 4 and the pressing force of the sub pressurizing shaft 5 is easy.

  The lower end portion of the main pressure shaft 4 is connected and integrated with the back side of the pressure head 3, and the lower end portions of the plurality of sub pressure shafts 5 are divided from the pressure head 3. For this reason, it is easy to start the pressurization of the pressurization head 3 on the plurality of sub pressurization shafts 5 after the main pressurization shaft 4 starts to press the pressurization head 3.

  Further, the pressure head 3 connects the first plate 31 facing the workpiece placement surface 21, the second plate 32 facing the first plate 31 on the back side, and the second plate 32 and the first plate 31. And a plurality of connecting shafts 33. For this reason, the load received by the second plate 32 can be properly transmitted to the first plate 31. Further, since the first plate 31 on the workpiece 10 side and the second plate 32 on the pressing shaft side are connected by a plurality of connecting shafts 33, the heat between the first plate 31 and the second plate 32. Conductivity can be reduced.

(Other embodiments)
Although the embodiments of the present invention have been specifically described above, it is needless to say that the present invention is not limited to the above-described embodiments and can be variously modified without departing from the gist thereof.

  For example, in the embodiment described above, the sub pressure shaft 5 corresponds to four corners of a virtual rectangle or square centered on the main pressure shaft 4 in accordance with the square shape of the workpiece 10 and the pressure head 3. Although arranged at each of the positions, for example, three or more sub pressurizing shafts 5 may be disposed at equiangular intervals on a virtual circle centered on the main pressurizing shaft 4. Further, the sub pressure shaft 5 may be movable in a direction orthogonal to the axial direction, and the relative position of the sub pressure shaft 5 with respect to the main pressure shaft 4 may be adjustable. Further, each of the main pressure shaft 4 and the sub pressure shaft 5 can be moved in a direction orthogonal to the axial direction, and the relative position of the sub pressure shaft 5 to the main pressure shaft 4 can be adjusted. Good.

  In the above embodiment, the pressure head 3 including the first plate 31, the second plate 32, and the connecting shaft 33 is used. However, when the whole plate-shaped pressure head 3 is used, the present embodiment is used. The invention may be applied. The table 2 may be a slide type. Moreover, in the said embodiment, the table 2 and the pressurization head 3 were rectangular, However, You may apply this invention, when the table 2 and the pressurization head 3 are circular.

  Moreover, regarding the atmosphere which pressurizes the workpiece | work 10, any in air | atmosphere, a vacuum atmosphere, and an inert gas atmosphere may be sufficient.

  Further, the fluid pressure cylinder device is exemplified as means for pressurizing the workpiece 10, but the main pressurizing shaft 4 and the plurality of sub pressurizing shafts 5 are driven using another mechanical device such as a cam mechanism. Also good.

  Moreover, in the said embodiment, although the plate-shaped metal mold | die was illustrated as the workpiece | work 10, this invention is applied to pressurization of plate-shaped members other than plate-shaped metal molds, such as a plate-shaped baseplate of a machine tool. May be. In addition, the workpiece 10 is not limited to a flat plate shape, and may be a workpiece having an uneven shape or a curved shape. In such a configuration, the workpiece placement surface 21 and the surface that presses the workpiece on the pressure head 3 are used. Can correspond to the shape of the workpiece, it is possible to pressurize a workpiece other than the flat workpiece 10.

  In the present invention, when the main pressure shaft presses the center of the pressure head from the back side, a large load is applied to the center of the work, while a small load is applied to the end of the work. Since the sub pressure shaft pressurizes the pressure head from the back side around the main pressure shaft, the balance of the load at the center and the end of the workpiece can be optimized. Therefore, the entire surface of the workpiece can be appropriately pressurized, such as being able to pressurize the entire surface of the workpiece evenly. In addition, since the load balance when the workpiece is pressurized by the main pressure axis is corrected by the multiple pressure axes, settings such as the pressure on the main pressure axis and the pressure on the sub pressure axis are set. Is easy.

Claims (9)

A table with a workpiece mounting surface;
A pressure head facing the workpiece placement surface;
A main pressing shaft that pressurizes the center of the pressing head from the back side toward the workpiece mounting surface;
A plurality of sub pressure shafts that pressurize the back side of the pressure head toward the work placement surface around the main pressure shaft;
A control unit for controlling the pressurizing condition by the main pressurizing shaft and the pressurizing condition by the plurality of sub pressurizing shafts;
Have
The pressure head is
A first plate facing the workpiece placement surface;
A second plate opposed to the first plate on the back side and pressurized from the back side by the main pressure shaft and the plurality of sub pressure shafts;
A plurality of connecting shafts connecting the second plate and the first plate;
A pressurizing apparatus characterized by comprising: The pressurizing apparatus according to claim 1, wherein
The pressurizing device, wherein the main pressurizing shaft has a larger diameter than the sub pressurizing shaft. The pressurizing apparatus according to claim 1, wherein
The said pressurization axis | shaft is arrange | positioned in each of the position corresponded to four corners of the virtual rectangle or square centering on the said main pressurization axis | shaft. The pressurizing apparatus according to any one of claims 1 to 3,
The pressurizing device, wherein the control unit controls the pressurizing force of the main pressurizing shaft to be larger than the pressurizing force of the sub pressurizing shaft. The pressurizing apparatus according to any one of claims 1 to 3,
The controller is configured to start pressurization of the pressurization head on the plurality of sub pressurization shafts after starting pressurization of the pressurization head on the main pressurization shaft. . The pressurizing apparatus according to claim 5, wherein
The lower end portion of the main pressure shaft is connected to and integrated with the back side of the pressure head,
The pressurizing device, wherein lower end portions of the plurality of sub pressurizing shafts are divided from the pressurizing head. The pressurizing apparatus according to any one of claims 1 to 3,
Each of the pressure head and the table is provided with a temperature adjusting device . The pressurizing apparatus according to any one of claims 1 to 3,
A pressurizing apparatus, wherein a plate-like work is disposed on the work placing surface. After placing the work on the work placement surface of the table, a pressurizing method of pressurizing the work with a pressure head,
A main pressure shaft that pressurizes the center of the pressure head from the back side toward the work placement surface, and the back side of the pressure head around the main pressure shaft is directed toward the work placement surface. A plurality of sub-pressurizing shafts for pressurization,
The pressure head is opposed to the work placement surface by the first plate, and is opposed to the first plate on the back side, and is pressurized from the back side by the main pressure shaft and the plurality of sub pressure shafts. A second plate, and a plurality of connecting shafts for connecting the second plate and the first plate,
A pressurizing method comprising pressing the pressurizing head toward the work by the main pressurizing shaft and pressurizing the pressurizing head toward the work by the plurality of sub pressurizing shafts.

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