Press apparatus

Abstract

To provide a press apparatus allowing a user to easily recognize useful information related to forming processing, where it has been found that the amount of eccentricity of a load applied to a slide during a molding operation becomes useful information from various viewpoints.SOLUTION: A press apparatus includes a slide for applying a load to material to be formed, and a display portion for displaying an eccentric amount of an eccentric load acting on the slide by a plot.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a press apparatus. [Background technology]

[0002] Patent Document 1 describes a press machine that measures the amount of eccentricity of a load applied to a slide. The press machine outputs abnormality information when the load exceeds a limit value corresponding to the amount of eccentricity. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-209887 A Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors have found that the eccentricity of the load applied to the slide during the forming operation provides useful information from various viewpoints. An object of the present invention is to provide a press device that allows a user to easily recognize useful information regarding the forming process. [Means for solving the problem]

[0005] The present invention relates to a slide for applying a load to the material to be molded; a display unit that displays an eccentricity of the eccentric load acting on the slide by plotting; The press device is provided with: Effect of the Invention

[0006] According to the present invention, it is possible to obtain an effect that a user can easily recognize useful information regarding a molding process. [Brief description of the drawings]

[0007] [Figure 1]FIG. 1 is a diagram showing a press apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 11 is a diagram for explaining an example of a method for calculating an amount of eccentricity. [Diagram 3] FIG. 2 is a block diagram showing a display control configuration of the press apparatus according to the embodiment. [Figure 4] FIG. 4 is an image showing the amount of eccentricity displayed in the first embodiment. [Diagram 5] FIG. 11 is an image showing the amount of eccentricity displayed in the second embodiment. [Figure 6] FIG. 13 is an image showing the amount of eccentricity displayed in the third embodiment. [Figure 7] 10 is a flowchart showing a procedure for an eccentricity amount display process executed by a control unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a diagram showing a press device according to an embodiment of the present invention.

[0009] The press machine 1 according to this embodiment is a machine for performing forging, and includes a bed 23, an upright 22, a crown 21, a bolster 24, a slide 18, and a drive unit 10.

[0010] The bed 23, the upright 22, and the crown 21 constitute a frame portion of the press device 1. The bed 23, the upright 22, and the crown 21 are fastened to each other by inserting a tie rod 25a therein and tightening with a tie rod nut 25b.

[0011] The bolster 24 is fixed onto the bed 23, and a mold 27 is fixed onto the upper portion thereof. The slide 18 is supported by a guide 19 provided on the upright 22 so that it can move up and down. A die 26 is fixed to the lower part of the slide 18. When the slide 18 descends, the die 26 and the die 27 approach each other, and the workpiece is forged between them. There is no particular restriction on the direction in which the slide 18 moves up and down (press direction).

[0012] The drive unit 10 is configured to move the slide 18 forward and backward, and is configured with a motor 11, a flywheel 12, a clutch 13, a transmission shaft 14, a reducer 15, an eccentric shaft 16, and a connecting rod (connecting rod) 17. Of these, the transmission shaft 14 (including a drive shaft 31 described below) and the eccentric shaft 16 correspond to an example of a rotating shaft according to the present invention.

[0013] The motor 11 is fixed to a frame part such as the crown 21. The power of the motor 11 is transmitted to the flywheel 12 via a belt 11a, causing the flywheel 12 to rotate. The flywheel 12 is supported rotatably and stores rotational energy. The clutch 13 is disposed at one end of the transmission shaft 14 in the axial direction and controls the connection between the flywheel 12 and the transmission shaft 14 to rotate the transmission shaft 14. The transmission shaft 14 transmits the rotational motion of the flywheel 12 to the reducer 15. The reducer 15 reduces the rotational motion of the transmission shaft 14 and transmits it to the eccentric shaft 16. The eccentric shaft 16 is rotatably supported by a frame part such as the crown 21 or the upright 22 via a bearing 41. The eccentric shaft 16 has a hollow portion penetrating along the rotation center axis Ax, and the transmission shaft 14 is disposed within the hollow portion so as to be rotatable relative to the eccentric shaft 16. The connecting rod 17 connects the eccentric shaft 16 and the slide 18 , converts the rotational motion of the eccentric shaft 16 into linear motion, and transmits it to the slide 18 .

[0014] <Slide position adjustment mechanism> The press device 1 further includes a position adjustment mechanism 18a that can adjust the lower end position of the slide 18 slightly (for example, 20 mm or less) up and down. As the position adjustment mechanism 18a, for example, a slide mechanism using a wedge mechanism or a slide mechanism using a trapezoidal slide block is applied, but any mechanism may be applied as long as it is capable of small position adjustment and can withstand a large load.

[0015] By adjusting the lower end position of the slide 18 with the position adjustment mechanism 18a, it is possible to finely adjust the distance between the slide 18 and the bolster 24 when the slide 18 reaches the bottom dead center.

[0016] <Mold configuration> The press device 1 is provided with a pair of upper and lower dies 26, 27 or multiple pairs of upper and lower dies 26, 27 for molding the material to be molded. One of the dies 26 is an upper die and is fixed to the slide 18. The other die 27 is a lower die and is fixed to the bolster 24.

[0017] The dies 26 and 27 are provided with a plurality of cavities 28a to 28c for performing a plurality of molding steps, respectively. The number of the plurality of molding steps may be two or four or more steps, but the following describes a case where there are three molding steps. The plurality of cavities 28a to 28c correspond to a first cavity 28a for performing a first molding step, a second cavity 28b for performing a second molding step, and a third cavity 28c for performing a third molding step. As the first to third steps, for example, a crushing step, a rough forging step, a finishing step, etc. may be adopted, but various other steps may also be adopted.

[0018] The molding process of the press device 1 for one material is completed by processing the material to be molded in the first process, the second process, and the third process in order. In the press device 1, the forming process for a plurality of materials to be molded is performed in parallel. Therefore, in the press device 1, there are cases where the material to be molded is charged into only one of the first cavity 28a to the third cavity 28c and a molding operation is performed, cases where the material to be molded is charged into two of the first cavity 28a to the third cavity 28c and a molding operation is performed, and cases where the material to be molded is charged into all three of the first cavity 28a to the third cavity 28c and a molding operation is performed. In this way, in one molding operation, the material to be molded may be charged into different cavities among the plurality of cavities 28a to 28c. These states are called material states. For example, the material state being only the k1 process indicates a state where the material to be molded is charged only into the cavity in the k1 process. Moreover, the material state k1+···+kx step indicates a state in which the molding material is poured into a plurality of cavities in the k1 step to the lx step. The molding operation refers to the operation of the press device 1 when the molding material is deformed by the load applied by the movement of the slide 18.

[0019] Some of the multiple cavities 28a to 28c are arranged at eccentric positions on the slide 18 and the bolster 24, for example, on the left, center, or right. Therefore, the amount of eccentricity of the eccentric load acting on the slide 18 during the molding operation generally varies depending on the material condition.

[0020] <Calculation of Eccentricity>

[0021] In order to calculate the amount of eccentricity of the eccentric load acting on the slide 18, the press apparatus 1 includes, for example, load detectors 31a-31d which detect the four loads applied to the four uprights 22, respectively, and a control unit 37 (see FIG. 3) which calculates the amount of eccentricity from the outputs of these load detectors. The load detectors 31a-31d are configured to detect the load from the amount of extension of the uprights 22, for example.

[0022] Fig. 2 is a diagram for explaining a method for calculating the amount of eccentricity. Fig. 2 shows the arrangement of the four uprights 22 and the slide 18 in the press apparatus 1, with Fig. 2(a) being a plan view, Fig. 2(b) being a front view, and Fig. 2(c) being a side view. As shown in Fig. 2, the four uprights 22 are arranged symmetrically in the left-right and front-rear directions with respect to a central axis A18 of the slide 18 in the left-right and front-rear directions.

[0023] The control unit 37 calculates the eccentricity e in the left-right direction, for example, by the following equation (1): T Calculate the eccentricity in the front-rear direction e using the following formula (2). L Calculate. e T = {(F1+F3)-(F2+F4)}×LF1 / Ftot (1) e L = {(F1+F2)-(F3+F4)}×LF2 / Ftot (2) Here, F1 to F4 are the loads applied to the left front, right front, left rear, and right rear uprights 22, respectively. Ftot is the total load, that is, Ftot = F1 + F2 + F3 + F4. LF1 is the length in the left-right direction from the central axis A18 of the slide 18 to the central axis A22 of one of the uprights 22, as shown in FIG. 2(b). LF2 is the length in the front-rear direction from the central axis A18 of the slide 18 to the central axis A22 of one of the uprights 22, as shown in FIG. 2(c). The amount of eccentricity in the left-right direction e T When it is positive, it indicates right eccentricity, and when it is negative, it indicates left eccentricity. L When positive, it indicates anterior eccentricity, and when negative, it indicates posterior eccentricity.

[0024] By performing the above-mentioned calculation, the control unit 37 calculates the eccentricity e in the left-right direction. T and the eccentricity in the front-back direction e L The eccentricity e T , e LThe method of finding is not limited to the above example, and for example, a correction term for correcting an error caused by the structure of the press device 1 may be added to the above calculation formulas (1) and (2), or a different calculation formula based on logic different from the above example may be used. In addition, the configuration for detecting the load is not limited to the above example, and any configuration may be used as long as it can detect the load used to calculate the amount of eccentricity.

[0025] <Display control configuration> Fig. 3 is a block diagram showing a display control configuration of the press apparatus according to the embodiment. As shown in Fig. 3, the press apparatus 1 includes a display unit 38 that displays the amount of eccentricity of the eccentric load acting on the slide 18 during a forming operation, and a control unit 37 that controls the display of the display unit 38. The display unit 38 is configured to be capable of displaying images, such as a liquid crystal monitor or an organic EL (electro-luminescence) monitor. The display unit 38 may be a touch display or the like, and may be configured to allow a user to input an operation command. The control unit 37 is a computer that operates according to a control program, generates image data for displaying the amount of eccentricity, and sends a display signal for displaying the amount of eccentricity to the display unit 38.

[0026] The press device 1 further includes an information input unit 36 ​​for acquiring information on the material state, the load detectors 31a to 31d described above, and an adjustment amount measuring device 18b for measuring the adjustment amount of the position adjustment mechanism 18a, in order to acquire information on the molding conditions. The information on the molding conditions is used to control the display of the eccentricity amount. The molding conditions include the material state, total load, and position adjustment amount of the slide 18 described above. The molding conditions may also include various other conditions, such as the speed of the slide 18.

[0027] The information input unit 36 ​​is an interface for inputting information on the material state from a control unit of a manipulator device that controls the material state, and receives information on the cavities 28a-28c in which the manipulator device has set the molding material. The information input unit 36 ​​is not limited to the above configuration. For example, a sensor may be provided to detect whether or not the molding material has been introduced into each of the cavities 28a-28c of the molds 26, 27 before the molding operation, and the information input unit 36 ​​may receive the output of the sensor. Any other configuration may be adopted for the information input unit 36 ​​as long as it is possible to obtain information on the material state.

[0028] The control unit 37 receives acquired information or detection values ​​from the information input unit 36, the load detectors 31a to 31d, and the adjustment amount measuring instrument 18b. The control unit 37 can calculate the total load and the eccentric amount of the eccentric load from the detection values ​​of the load detectors 31a to 31d. The control unit 37 can obtain the adjustment amount of the lower end position of the slide 18 based on the measurement value of the adjustment amount measuring instrument 18b.

[0029] The molding conditions used in controlling the display of the eccentricity amount are not limited to the above three conditions. The molding conditions may be only one or two of the above three conditions, or may include other conditions such as the speed of the slide 18.

[0030] <Eccentricity display D1> Fig. 4 is an image diagram showing the eccentricity amount display of the first embodiment. In the press apparatus 1 of the first embodiment, the display unit 38 outputs the eccentricity amount display D1 shown in Fig. 4 based on the display control of the control unit 37. The eccentricity amount display D1 includes a first graph G1 in which the left-right eccentricity amount is displayed on the first axis A1 and the total load is displayed on the second axis A2, and a second graph G2 in which the front-rear eccentricity amount is displayed on the third axis A3 and the total load is displayed on the fourth axis A4. The first graph G1 and the second graph G2 are two-dimensional graphs.

[0031] The first graph G1 shows the left-right eccentricity of the eccentric load acting on the slide 18 during one molding operation, plotted in a different manner depending on the molding conditions. The second graph G2 shows the front-rear eccentricity of the eccentric load acting on the slide 18 during one molding operation, plotted in a different manner depending on the molding conditions.

[0032] A plot is a mark drawn on a graph that indicates the coordinate position of the graph. Many different types of plots can be applied, including different mark shapes such as circles, crosses, triangles, and squares, different filling patterns or the presence or absence of filling, line thickness, and color.

[0033] In the eccentricity display D1 in Fig. 4, the material status (which of the cavities 28a to 28c the molding material is being charged into) is applied as a molding condition corresponding to each aspect of the plot. The eccentricity display D1 includes a legend H1 showing the correspondence between multiple types of material status and the aspects of the plot.

[0034] Display elements L1 and L2 representing the limit load may be added to the first graph G1 and the second graph G2. For example, a line segment display may be applied to the display elements L1 and L2. The display element L2 indicates the range in which the limit load becomes smaller according to the amount of eccentricity when the amount of eccentricity on the left and right is large. When a plot is made in an area outside the display element L1, it indicates that a molding operation exceeding the limit load has been performed.

[0035] In the first graph G1 and the second graph G2, plots showing values ​​during a new molding operation are added while plots showing values ​​during past molding operations are left. It is not necessary to leave all past plots, and it is possible to leave, for example, plots for a predetermined number of past runs, plots for a predetermined time period, or plots that meet predetermined statistical conditions, such as plots close to the average, plots far from the average, plots reflecting variance, etc., by performing statistical calculations for each group with the same molding conditions.

[0036] Furthermore, the first graph G1 and the second graph G2 may be displayed in a way that makes it easy for the user to recognize which is the latest plot, for example, by flashing the latest plot or displaying it with high brightness.

[0037] In the eccentricity display D1, the user can compare the plot of the current molding operation with a past plot of the same type as the current plot. This comparison allows the user to recognize the difference in eccentricity between the current molding operation and the past molding operations with the same or similar molding conditions. Normally, these plots are located together in one area, but if there is some abnormality in the molding process, the current plot may be located in an area away from the past plots. If the position of the plot is far from the past plots as a result of the above comparison, the user can sense the possibility that some abnormality has occurred and can quickly deal with the abnormality if it occurs. Moreover, the abnormality is an abnormality within the range where the load is within the limit load, and corresponds to an abnormality that allows the molding process to be continued. This reduces the situation where the molding process of a defective product is continued without noticing the abnormality.

[0038] It is not essential that the output of the past plots be saved in order for the user to compare the plot of the current molding operation with past plots of the same aspect as the current plot. Even if the display of the past plots is not saved, the user can notice any significant change in the plot position by continuously viewing the plots output during each molding operation.

[0039] The user can make effective adjustments to the molding conditions (for example, optimization of the molding conditions) and effective adjustments to the die design (for example, optimization of the die design) by referring to the eccentricity display D1. That is, in the molding process (i.e., forging process), even if the load applied to the slide 18 does not exceed the limit load of the press device 1, for example, the eccentricity may be large enough to approach the limit, or the large eccentricity may reduce the margin from the limit load. In such a situation, improvement may be desired when high stability of the molding process is required. According to the press device 1 of this embodiment, the user can easily find the above-mentioned situation from the eccentricity display D1, and can utilize it for adjusting the molding conditions, adjusting the die design, and the like.

[0040] In the eccentricity display D1 in Fig. 4, an example is shown in which the multiple molding conditions respectively corresponding to the plot patterns are only multiple material states. However, multiple types of plot patterns corresponding to multiple molding conditions, including the adjustment amount of the lower end position of the slide 18, the speed of the slide 18, etc., may be prepared, and plot patterns according to these molding conditions may be displayed.

[0041] 4 shows a configuration in which a first graph G1 indicating the amount of eccentricity in the left and right direction and a second graph G2 indicating the amount of eccentricity in the front and rear direction are output simultaneously. However, a configuration in which only one of the first graph G1 and the second graph G2 is output may be adopted, or a configuration in which it is possible to switch between outputting either the first graph G1 or the second graph G2, or both, by a user's operation may be adopted.

[0042] <Eccentricity display D2> Fig. 5 is an image diagram showing the eccentricity amount display of embodiment 2. In the press apparatus 1 of embodiment 2, the display unit 38 outputs the eccentricity amount display D2 shown in Fig. 5 based on the display control of the control unit 37. The eccentricity amount display D2 includes a third graph G3 in which the left-right eccentricity amount is displayed on the fifth axis A5 and the front-rear eccentricity amount is displayed on the sixth axis A6. The third graph G3 is a two-dimensional graph.

[0043] The third graph G3 displays the left-right eccentricity and front-rear eccentricity of the eccentric load acting on the slide 18 during one molding operation in a plot that differs according to the molding conditions. The material state and the total load are applied to the above molding conditions. In detail, in the case of "1+2+3 process", multiple molding conditions classified by the total load are applied. The eccentricity display D2 includes a legend display H2 that shows the correspondence between multiple types of molding conditions and the plot patterns.

[0044] Display elements L3 and L4 representing the limit load may be added to the third graph G3. For example, line segments may be used for the display elements L3 and L4. In the example of Fig. 5, the display element L3 indicates the range in which the maximum limit load is applied, and the display element L4 indicates the range in which the limit load is lowered due to eccentricity. In other words, the range outside the range indicated by the display elements L3 and L4 indicates that the amount of eccentricity is not permitted.

[0045] In the third graph G3, a plot display showing values ​​during a new molding operation is added while the plot display showing values ​​during past molding operations remains. It is not necessary to leave all past plot displays, and for example, plots for a predetermined number of past runs may be left, or plots for a predetermined time period may be left, or a statistical calculation may be performed for each plot with the same molding conditions, and plots that meet a predetermined statistical condition, such as those close to the average value, those far from the average value, those reflecting the variance, etc., may be left.

[0046] Furthermore, the third graph G3 may be displayed in such a way that it is easy for the user to recognize which plot is the most recent, for example by flashing the most recent plot or displaying it with high brightness.

[0047] In the eccentricity display D2, the user can compare the plot of the current molding operation with a past plot of the same type as the plot. By this comparison, the user can recognize the difference in the eccentricity between the current molding operation and the past molding operation with the same or similar molding conditions. Normally, these plots are located together in one area, but if there is some abnormality in the molding process, the current plot may be located in an area away from the past plot. If the position of the plot is far from the past plot as a result of the above comparison, the user can sense the possibility that some abnormality has occurred and can quickly deal with the abnormality if it occurs. The abnormality corresponds to an abnormality where the load is within the limit load and the molding process can be continued. Therefore, it is possible to reduce the situation where the molding process of a defective product is continued without noticing the abnormality.

[0048] It is not essential that the output of the past plots be saved in order for the user to compare the plot of the current molding operation with past plots of the same aspect as the current plot. Even if the display of the past plots is not saved, the user can notice any significant change in the plot position by continuously viewing the plots output during each molding operation.

[0049] The user can make effective adjustments to the molding conditions (e.g., optimization of the molding conditions) and effective adjustments to the die design (e.g., optimization of the die design) by referring to the eccentricity display D2. That is, in the molding process (i.e., forging process), even if the load applied to the slide 18 does not exceed the load limit of the press device 1, for example, the margin of the eccentricity may be small. In such a situation, improvement may be desired when high stability of the molding process is required. According to the press device 1 of this embodiment, the user can easily find the above-mentioned situation from the eccentricity display D2, and can utilize it for adjusting the molding conditions, adjusting the die design, and the like.

[0050] In the eccentricity display D2 in Fig. 5, the molding conditions respectively corresponding to the plot patterns are a plurality of material states and total loads. However, a variety of plot patterns corresponding to a variety of molding conditions including the adjustment amount of the lower end position of the slide 18, the descending speed of the slide 18, etc. may be prepared, and the plot patterns according to these molding conditions may be displayed.

[0051] <Eccentricity display D3> Fig. 6 is an image diagram showing the eccentricity amount display of the third embodiment. In the press apparatus 1 of the third embodiment, the display unit 38 outputs the eccentricity amount display D3 shown in Fig. 6 based on the display control of the control unit 37. The eccentricity amount display D3 includes a fourth graph G4 in which the left-right eccentricity amount is displayed on the seventh axis A7 and the front-rear eccentricity amount is displayed on the eighth axis A8. The fourth graph G4 is a two-dimensional graph.

[0052] In the fourth graph G4, the left-right eccentricity amount and the front-rear eccentricity amount of the eccentric load acting on the slide 18 during one molding operation are displayed by plots in different modes according to the molding conditions. The above molding conditions are applied with the material state and the adjustment amount of the lower end position of the slide 18. The adjustment amount of the lower end position is divided into three sections, a first section "0mm to 3mm", a second section "3mm to 6mm", and a third section "6mm to 9mm", which are obtained by dividing the adjustable width of 0mm to 9mm. The sections may be divided more finely. Alternatively, when only a part of the adjustable width of 0mm to 9mm (for example, 3.0mm to 3.3mm) is adjusted, the plot modes may be associated with each adjustment amount obtained by dividing the part of the range more finely, so that the plot modes can be set by the user, for example. For example, the first section is "3.0mm to 3.1mm", the second section is "3.1mm to 3.2mm", and the third section is "3.2mm to 3.3mm". The eccentricity amount display D3 includes a legend display H3 showing the correspondence between a plurality of molding conditions and the plot patterns.

[0053] The fourth graph G4 may include display elements L3 and L4 representing the limit load, similar to the third graph G3.

[0054] In the fourth graph G4, a plot display showing values ​​during a new molding operation is added while the plot display showing values ​​during past molding operations remains. It is not necessary to leave all past plot displays, and for example, plots for a predetermined number of past runs may be left, or plots for a predetermined time period may be left, or a statistical calculation may be performed for each plot with the same molding conditions, and plots that meet a predetermined statistical condition, such as those close to the average value, those far from the average value, those reflecting the variance, etc., may be left.

[0055] Furthermore, the fourth graph G4 may be displayed in such a way that it is easy for the user to recognize which plot is the most recent, for example by flashing the most recent plot or displaying it with high brightness.

[0056] In the eccentricity display D3, the user can compare the plot of the current molding operation with a past plot of the same type as the current plot. This comparison allows the user to recognize the difference in eccentricity between the current molding operation and the past molding operation with the same or similar molding conditions. Normally, these plots are located together in one area, but if there is some abnormality in the molding process, the current plot may be located in an area away from the past plot. If the position of the plot is far from the past plot as a result of the above comparison, the user can sense the possibility that some abnormality has occurred and can quickly deal with the abnormality if it occurs. The abnormality corresponds to an abnormality where the load is within the limit load and the molding process can be continued. This reduces the situation where the molding process of a defective product is continued without noticing the abnormality.

[0057] It is not essential that the output of the past plots be saved in order for the user to compare the plot of the current molding operation with past plots of the same aspect as the current plot. Even if the display of the past plots is not saved, the user can notice any significant change in the plot position by continuously viewing the plots output during each molding operation.

[0058] The user can make effective adjustments to the molding conditions (e.g., optimization of the molding conditions) and effective adjustments to the die design (e.g., optimization of the die design) by referring to the eccentricity display D3. That is, in the molding process (i.e., forging process), even if the load applied to the slide 18 does not exceed the load limit of the press device 1, for example, the margin of the eccentricity may be small. In such a situation, improvement may be desired when high stability of the molding process is required. According to the press device 1 of this embodiment, the user can easily find the above-mentioned situation from the eccentricity display D3, and can utilize it for adjusting the molding conditions, adjusting the die design, and the like.

[0059] In addition, in the eccentricity amount display D3 in Fig. 6, an example is shown in which the multiple molding conditions respectively corresponding to the plot patterns are multiple material states and the adjustment amount of the lower end position of the slide 18. However, multiple types of plot patterns respectively corresponding to multiple molding conditions including the total load, the descending speed of the slide 18, etc. may be prepared, and plot patterns according to these molding conditions may be displayed.

[0060] The display unit 38 may also display a plot showing the amount of eccentricity on a graph in which the adjustment amount of the lower end position is shown by one graph axis. That is, the plot may be displayed with the second axis A2 and the fourth axis A4 of the first graph G1 and the second graph G2 representing the above-mentioned adjustment amount from the total load. Alternatively, instead of the above-mentioned adjustment amount, the value of another molding condition, such as the descending speed of the slide 18, may be applied as the value of one graph axis.

[0061] Furthermore, although it has been explained that the above-mentioned eccentricity amount displays D1 to D3 are output in the press apparatus 1 of embodiments 1 to 3, a single press apparatus 1 may be configured so that the output of each of the eccentricity amount displays D1 to D3 can be switched by user selection or the like.

[0062] <Eccentricity display processing> 7 is a flowchart showing the procedure of the eccentricity amount display process executed by the control unit. The program for the eccentricity amount display process is stored in the storage unit 37a (see FIG. 3) of the control unit 37. When the eccentricity amount display process is started by a user's operation or the like, first, an entire image of the eccentricity amount displays D1 to D3 is output to the display unit 38 (step S1). The entire image means the whole except for the plots.

[0063] Next, the control unit 37 waits for the start of one molding operation (step S2), and when the molding operation starts, it acquires information on the material state and the adjustment amount of the position adjustment mechanism 18a (step S3). Furthermore, the control unit 37 continuously inputs the detection values ​​of the load detectors 31a to 31d (step S4), and extracts the detection values ​​during the molding operation (for example, the maximum detection value, or the detection value just before the slide 18 reaches the bottom dead center) (step S5). Next, the control unit 37 calculates the eccentricity amount e in the left-right direction and the front-back direction based on the detection values ​​of the load detectors 31a to 31d extracted in step S5. T , e L , and the total load is calculated (step S6).

[0064] Next, the control unit 37 determines the plot pattern that is preliminarily associated with the molding conditions based on the molding conditions acquired in step S3 or the molding conditions to which the total load calculated in step S6 is added (step S7). T , e L Then, in accordance with the plot form determined in step S7, the control unit 37 additionally outputs a plot to the graph showing the amount of eccentricity (step S8), and returns the process to step S2.

[0065] By such an eccentricity amount display process, the above-mentioned eccentricity amount displays D1 to D3 are output.

[0066] As described above, the press apparatus 1 of this embodiment is provided with the display unit 38 that displays the amount of eccentricity of the eccentric load during the forming operation as a plot. Therefore, based on the display of the plot, the user can quickly detect the occurrence of an abnormality and deal with the abnormality. Furthermore, when the margin for the amount of eccentricity is small, the user can make effective adjustments to the forming conditions or the die design by utilizing the information on the amount of eccentricity.

[0067] Furthermore, according to the press apparatus 1 of this embodiment, the amount of eccentricity is displayed by plotting in different ways depending on the molding conditions. Therefore, when molding operations are performed under different molding conditions, the user can easily distinguish whether the plots are for molding operations under the same or similar molding conditions. Therefore, the user can compare the amount of eccentricity for each of the same or similar molding conditions.

[0068] In this embodiment, the press apparatus 1 is targeted for performing molding processes under a plurality of molding conditions, and therefore an example is given in which a plot is displayed in a different manner depending on the molding condition. However, in the case of a press apparatus in which molding processes under one molding condition are continuously performed, the molding condition is determined to be one, so the configuration of displaying a plot in a different manner depending on the molding condition may be omitted. Also, if the molding condition does not have a large effect on the amount of eccentricity, even if there are a plurality of molding conditions, the configuration of displaying a plot in a different manner depending on the molding condition may be omitted.

[0069] According to the press apparatus 1 of this embodiment, the first graph G1 to the third graph G3 further plot the amount of eccentricity in the left-right direction, the front-back direction, or both of these directions of the slide 18. Therefore, these displays allow the user to focus on and monitor the amount of eccentricity with high importance, depending on the case where the amount of eccentricity in the left-right direction is important in the molding process, the amount of eccentricity in the front-back direction is important in the molding process, or the amount of eccentricity in both directions is important in the molding process.

[0070] Furthermore, according to the press device 1 of this embodiment, the material state, the total load, the adjustment amount of the lower end position of the slide 18, and the descending speed of the slide 18 are applied as molding conditions that change the plot pattern. Therefore, when molding processes are continuously performed while changing these molding conditions, the user can easily distinguish and monitor the molding processes under each molding condition.

[0071] Furthermore, according to the press apparatus 1 of this embodiment, while the forming operations are repeatedly performed, the plot display is added for each forming operation, so that the user can easily compare the amount of eccentricity of the past forming operations with the amount of eccentricity of the current forming operation.

[0072] Furthermore, according to the press apparatus 1 of this embodiment, a plot display of a first graph G1 having a first axis A1 representing the left-right eccentricity amount and a second axis A2 representing the total load is performed. This plot display makes it easy for the user to understand the relationship between the left-right eccentric load and the limit load. Furthermore, according to the press apparatus 1 of this embodiment, a plot display of a second graph G2 having a third axis A3 representing the front-rear eccentricity amount and a fourth axis A4 representing the total load is performed. This plot display makes it easy for the user to understand the relationship between the front-rear eccentric load and the limit load or the allowable range of the eccentric load. Furthermore, according to the press apparatus 1 of this embodiment, a plot display of a third graph G3 having a fifth axis A5 representing the left-right eccentricity amount and a sixth axis A6 representing the front-rear eccentricity amount is performed. This plot display makes it easy for the user to understand the eccentric load on a two-dimensional plane.

[0073] The above describes each embodiment of the present invention. However, the present invention is not limited to the above embodiments. For example, in the above embodiment, the press device 1 driven by the flywheel 12 is shown, but the drive configuration of the press device may be, for example, a configuration using a servo motor or a configuration using a hydraulic ram. In addition, the molding conditions that change the plot mode are not limited to the specific examples described above, and various conditions may be applied depending on the drive configuration, etc. In addition, the details shown in the embodiments can be appropriately changed without departing from the spirit of the invention. [Explanation of symbols]

[0074] 1 Press equipment 12 Flywheel 13. Clutch 16 Eccentric axis 18 Slides 18a Position adjustment mechanism 18b Adjustment amount measuring instrument 22 Upright 25a tie rod 26, 27 Mold 28a~28c Cavity 31a~31d Load detector 36 Information input section 37 Control Unit 37a Storage section 38 Display section D1~D3 Eccentricity display G1~G4 1st graph~4th graph A1~A8 1st axis~8th axis Display legend H1~H3

Claims

1. a slide for applying a load to the material to be molded; a display unit that displays an eccentricity of the eccentric load acting on the slide by plotting; A press device comprising:

2. The display unit displays the amount of eccentricity by plotting in different ways depending on molding conditions. The press device according to claim 1.

3. The display unit displays the amount of eccentricity of the slide in the left-right direction, the front-back direction, or both directions by the plot. The press device according to claim 1.

4. The molding conditions include one or more of the following: a material state indicating which of a plurality of cavities included in one or a plurality of molds the molding material is poured into; a total load applied to the slide; an adjustment amount of the lower end position of the slide; and a descending speed of the slide. The press device according to claim 2.

5. While the molding operations are repeatedly performed a plurality of times, the display unit adds the display of the plot for each molding operation. The press device according to claim 1.

6. the display unit displays the plot on a two-dimensional graph having a first axis representing the amount of eccentricity in the left-right direction and a second axis representing a total load applied to the slide. The press device according to claim 3.

7. the display unit displays the plot on a two-dimensional graph having a third axis representing the amount of eccentricity in the front-rear direction and a fourth axis representing a total load applied to the slide. The press device according to claim 3.

8. the display unit displays the plot on a two-dimensional graph having a fifth axis representing the amount of eccentricity in the left-right direction and a sixth axis representing the amount of eccentricity in the front-rear direction. The press device according to claim 3.

Images