Air supply device, air intake device, and processing system

Abstract

To provide an air supply device, an air intake device, and a processing system that can suppress the increase in size of press working equipment. [Solution] The air supply device according to this disclosure supplies gas to generate pressure on the sheet material in the direction of the lower die in the space created between the upper die and the sheet material when the stripper provided on the upper die, which presses the sequentially fed sheet material with the upper die and the lower die, rises.

Description

Technical Field

[0001] The present disclosure relates to an air supply device, an air intake device, and a processing system.

Background Art

[0002] In recent years, in a processing device that feeds a plate material (workpiece) forward and performs press processing, a technique for suppressing the flutter of the plate material during forward feeding has been disclosed. For example, the press processing device disclosed in Patent Document 1 has a pressing member on the upper die of the device. The pressing member presses the electromagnetic steel sheet from above until the electromagnetic steel sheet is lifted to a predetermined upper position by a lifter or the like. Thereby, when the electromagnetic steel sheet is lifted to a predetermined upper position, it is possible to suppress the electromagnetic steel sheet from fluttering upward due to the inertial force generated in the upward direction of the electromagnetic steel sheet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the press processing device of Patent Document 1, in order to suppress the flutter of the plate material, it is necessary to provide a pressing member on the upper die of the device. And, in the pressing member according to Patent Document 1, since it has an elastic member that expands and contracts in the height direction, providing the pressing member causes the upper die of the press processing device to become bulky in the height direction. As a result, by providing the pressing member on the upper die, there is a risk that the press processing device will become larger.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide an air supply device, an air intake device, and a processing system capable of suppressing the enlargement of a press processing device.

Means for Solving the Problems

[0006] The air supply device according to this disclosure supplies gas to the space between the upper die and the sheet metal, generating pressure on the sheet metal in the direction of the lower die, when the stripper provided on the upper die rises, which presses the sequentially fed sheet metal between the upper die and the lower die. This gas generates pressure on the sheet metal in the direction of the lower die. As a result, the pressure in the direction of the upper die can be suppressed, and the size of the press working device can be suppressed without providing a pressing member on the upper die.

[0007] The intake device according to this disclosure draws in air that generates pressure on the sheet metal in the direction of the upper die when the stripper provided on the upper die rises, in the space created between the lower die and the sheet metal. This air generates pressure on the sheet metal in the direction of the upper die. As a result, the pressure in the direction of the upper die can be suppressed, and the size of the press working apparatus can be suppressed without providing a pressing member on the upper die.

[0008] The processing system according to this disclosure comprises a processing apparatus that presses a sequentially fed sheet metal using an upper die and a lower die equipped with a punch and a stripper, and an air supply device that supplies gas to generate pressure on the sheet metal in the direction of the lower die in the space created between the upper die and the sheet metal when the stripper rises. This air generates pressure on the sheet metal in the direction of the lower die. As a result, the pressure in the direction of the upper die can be suppressed, and the size of the press processing apparatus can be suppressed without providing a pressing member on the upper die.

[0009] The processing system according to this disclosure includes a processing device that presses a sequentially fed sheet metal using an upper die and a lower die equipped with a punch and a stripper, and an air intake device that draws in air that generates pressure on the sheet metal in the direction of the upper die in the space created between the lower die and the sheet metal when the stripper rises. This air generates pressure on the sheet metal as the upper die moves. As a result, the pressure in the direction of the upper die can be suppressed, and the size of the press processing device can be suppressed without providing a pressing member on the upper die. [Effects of the Invention]

[0010] According to this disclosure, it is possible to provide an air supply device, an air intake device, and a processing system that can suppress the increase in size of press working equipment. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a schematic diagram of the press working system 1 according to this disclosure. [Figure 2] Figure 2 is a schematic diagram showing a part of the press working system 1 related to this disclosure. [Figure 3] Figure 3 is a schematic diagram of the press working system 1 according to this disclosure. [Figure 4] Figure 4 is a schematic diagram relating to the rising phenomenon of the plate material WW. [Figure 5] Figure 5 is a schematic diagram showing the process of fluttering occurring in the sheet material WW. [Figure 6] Figure 6 is a schematic diagram showing a part of the press working system 1a related to this disclosure. [Modes for carrying out the invention]

[0012] (Embodiment 1) Embodiment 1 of the present disclosure will be described below with reference to the drawings. Figure 1 is a schematic diagram of the press working system 1 according to the present disclosure. Figure 2 is a schematic diagram showing a part of the press working system 1 according to the present disclosure. Figure 1 shows the press working system 1 as viewed from the horizontal direction, and Figure 2 shows a part of the press working system 1 as viewed from the vertical direction. In other words, Figure 1 shows the press working system 1 as viewed in the positive Y-axis direction, and Figure 2 shows a part of the press working system as viewed in the negative Z-axis direction.

[0013] The press working system 1 comprises a press working device 2 and a pneumatic device 3. The press working system 1 performs a type of press working called punching on the sheet material WW flowing through the press working device 2. The sheet material WW is a strip-shaped thin sheet material made of metal such as steel or aluminum. The sheet material WW may be, for example, an electrical steel sheet.

[0014] In this disclosure, the press working system 1 performs progressive press working on a sheet material WW. Progressive press working is a processing method in which multiple processes are arranged in a predetermined direction at predetermined intervals on a single progressive die. Here, the progressive press working according to this disclosure may be double-row or single-row. That is, the progressive die according to this disclosure may or may not be formed to perform punching in multiple rows simultaneously. The press working system 1 may also perform single-stroke press working.

[0015] The press working system 1 may further include an uncoiler, a leveler, and a feeder (none of which are shown) upstream of the press working apparatus 2. The uncoiler is located upstream in the press working system 1. The uncoiler holds the rolled sheet material WW in a pullable manner. The uncoiler has the function of unwinding the sheet material WW by rotating it when it is fed to the press working apparatus 2. The leveler is located downstream of the uncoiler. The leveler has a pair of straightening rollers and corrects the deflection that occurs in the sheet material WW unwound from the uncoiler. The feeder is located further downstream of the leveler. The feeder has a pair of feed rollers and, by the rotation of these rollers, conveys the sheet material WW straightened by the leveler to the press working apparatus 2.

[0016] Next, the components of the press working system 1 will be described. The press working apparatus 2 comprises a lower die 21 and an upper die 22. The press working apparatus 2 is a device that performs press working on sheet material WW. The press working apparatus 2 comprises a lower die 21 and an upper die 22 such that multiple processes are arranged in a predetermined direction at predetermined intervals. The lower die 21 and the upper die 22 are a pair of dies that punch out the sheet material WW by applying pressure to it. Here, the lower die 21 and the upper die 22 together are also called progressive dies.

[0017] The lower die 21 and the upper die 22 may or may not be positioned opposite each other in the vertical direction. That is, the lower die 21 and the upper die 22 may or may not be positioned so that the sheet metal WW is conveyed horizontally and pressed. Hereafter, the lower die 21 and the upper die 22 will be assumed to be positioned opposite each other in the vertical direction. Also, hereafter, the direction in which the sheet metal WW is conveyed will be referred to as the forward direction. In Figure 1, the lower die 21 and the upper die 22 are positioned opposite each other in the Z-axis direction (vertical direction), and the sheet metal WW is conveyed in the positive X-axis direction (horizontal direction) by, for example, a feed device. That is, in Figure 1, the forward direction of the sheet metal WW is the positive X-axis direction.

[0018] The lower die 21 is a fixed die positioned below the plate material WW flowing through the press working apparatus 2. On the other hand, the upper die 22 is a movable die positioned above the plate material WW flowing through the press working apparatus 2. The upper die 22 can move, for example, in the vertical direction. That is, the upper die 22 can descend so as to approach the lower die 21, and can also ascend so as to move away from the lower die 21. The movement of the upper die 22 can be realized by a press machine (not shown).

[0019] The lower die 21 includes a die 23 and a lifter 24. The die 23 includes a die hole 231 and a holding portion 232. The die 23 is formed such that when the upper die 22 descends to the bottom dead center, a part of its upper surface and the lower surface of the upper die 22 sandwich the plate material WW. Among the die 23, the upper surface of the portion other than the die hole 231 and the holding portion 232 typically forms a horizontal plane. In FIG. 1, the upper surface of the portion of the die 23 other than the die hole 231 and the holding portion 232 forms an XY plane (horizontal plane).

[0020] The die hole 231 is a part of the processing portion when punching the plate material WW. That is, the die hole 231 is a through hole of the die 23 for punching the plate material WW in a shape along the contour of the upper die 22. The horizontal cross-section of the die hole 231 has a predetermined shape such as, for example, a circular shape or a polygonal shape. The central axis of the die hole 231 extends in the vertical direction. The metal piece punched from the plate material WW may be discharged to the outside via the die hole 231. The metal piece may be a product manufactured by punching, or may be scrap. The member punched from the plate material WW is referred to as a punched plate WO. In FIG. 1, the punched plate WO is accumulated in the die hole 231.

[0021] The holding portion 232 has a space for holding the lifter 24. The holding portion 232 has a space such that when the lifter 24 is lowered to its lowest point, the upper end of the lifter 24 and the upper surface of the die 23 are substantially flush. The shape of the holding portion 232 is typically concave, but it may also have a shape that conforms to the shape of the lifter 24. In Figure 1, the holding portion 232 has a concave shape. In addition, there may be multiple holding portions 232 arranged in the progressive direction of the sheet material WW, or only one may be arranged throughout the process of the press working apparatus 2. When multiple holding portions 232 are arranged, they may be arranged, for example, at regular intervals in the progressive direction of the sheet material WW.

[0022] The lifter 24 is a device for releasing and supporting the sheet metal WW, which has been punched out by the lower die 21 and the upper die 22, from the lower die 21. The lifter 24 is located within the holding section 232 and is movable vertically within the holding section 232. In other words, the lifter 24 is expandable and contractible vertically. For example, the lifter 24 rises in conjunction with the upper die 22, which rises when releasing the sheet metal WW from the lower die 21. At this time, the upper end of the lifter 24 pushes up the sheet metal WW, releasing it from the lower die 21. At the highest position of the lifter 24, the upper end of the lifter 24 is in contact with the sheet metal WW. At the lowest position of the lifter 24, the upper end of the lifter 24 and the upper surface of the die 23 are almost flush. Multiple lifters 24 may be arranged in the progressive direction of the sheet metal WW, or only one may be arranged throughout the process of the press working apparatus 2. When multiple lifters 24 are arranged, they are arranged, for example, at regular intervals in the forward direction of the plate material WW.

[0023] The lifter 24 includes a contact portion 241 and an elastic body 242. The upper surface of the contact portion 241 abuts against the lower surface of the sheet material WW when the sheet material WW is punched or when the sheet material WW is fed forward. When the upper surface of the contact portion 241 abuts against the lower surface of the sheet material WW when the sheet material WW is fed forward, the sheet material WW slides along the upper surface of the contact portion 241. The shape of the contact portion 241 can be, for example, cylindrical or prismatic. The contact portion 241 may also have a tapered portion in the forward feeding direction of the sheet material WW or in the opposite direction. In Figure 1, the contact portion 241 is columnar and has tapered portions in the forward feeding direction of the sheet material WW and in the opposite direction.

[0024] The elastic body 242 is a drive source that raises and lowers the contact portion 241 within the holding portion 232. The elastic body 242 is formed from, for example, a spring, cylinder, urethane, rubber, etc. One end of the elastic body 242 is in contact with or joined to the lower surface of the contact portion 241, and the other end is in contact with or joined to any surface on the inner surface of the holding portion 232. Preferably, the elastic body 242 has a Young's modulus sufficient to push up and support the punched sheet material WW. In Figure 1, the holding portion 232 is formed from a spring. Also in Figure 1, one end of the holding portion 232 is joined to the lower surface of the contact portion 241, and the other end is joined to the lower surface inside the holding portion 232.

[0025] The upper die 22 includes a stripper 25 and a punch 26. The stripper 25 descends towards the lower die 21 during punching. The lower surface of the descended stripper 25 and the die 23 grip the sheet metal WW as the punch 26 rises after punching. In this way, the stripper 25 removes the sheet metal WW that has become stuck to the rising punch 26 from the punch 26. The stripper 25 is typically a substantially rectangular sheet metal member. The stripper 25 may achieve its upward and downward movement by being connected to a punch holder (not shown) that holds the punch 26 via an elastic body (not shown) on its upper surface.

[0026] The stripper 25 is equipped with a punch hole 251. The punch hole 251 is part of the processing area when punching out the sheet material WW. Specifically, the punch hole 251 is a through hole of the stripper 25 provided in the corresponding punch 26. The punch hole 251 has a shape corresponding to the punch 26 through which it is inserted, and its central axis extends in the vertical direction. The punch hole 251 is positioned perpendicularly opposite the die hole 231.

[0027] The punch 26 is part of the processing unit used when punching out sheet metal WW. The punch 26 is positioned perpendicular to the die hole 231. Typically, the punch 26 is a column with an arbitrary horizontal cross-section. That is, the punch 26 punches out sheet metal WW in the shape of the contour of its horizontal cross-section, producing punched sheet metal WO. The punch 26 is formed to be slightly smaller in dimensions than the die hole 231. This ensures that when the punch 26 is inserted into the die hole 231, a certain clearance is maintained between the punch 26 and the die hole 231.

[0028] The upper surface of the punch 26 may be held by a punch holder. The upper surface of the punch holder may also be joined to the press machine. The punch 26 may achieve its vertical movement through the vertical movement of the punch holder accompanying the vertical movement of the press machine.

[0029] The press working apparatus 2 is equipped with side guides 27. The side guides 27 are configured to suppress misalignment during the transport of the sheet material WW by the feed device. The side guides 27 are provided on the widthwise edge of the sheet material WW. The side guides 27 may be provided on one edge or on both edges. In addition, multiple side guides 27 may be provided at regular intervals in the forward feeding direction of the sheet material WW. To suppress vertical vibration and widthwise misalignment, the side guides 27 typically have an inverted L-shape and are joined to the lower die 21. Under normal conditions, the side guides 27 may be in close proximity to or in contact with the transported sheet material WW.

[0030] Next, the air supply device 3 will be described. The air supply device 3 is a device that supplies gas to the space created between the upper die 22 and the sheet metal WW. The gas supplied by the air supply device 3 is, for example, air, but it may also be a gas other than air, or a mixture of air and other gases. A typical gas is compressed air. In the following description, the case in which air is used as the gas will be described. For example, after punching, when the stripper 25 is rising, the air supply device 3 supplies air to the space created between the stripper 25 and the sheet metal WW. The air supply device 3 may also supply air to the space when the sheet metal WW is being transported. Furthermore, during punching, when the stripper 25 is descending, the air supply device 3 may also supply air to the space. In other words, the air supply device 3 may be configured to continuously supply air.

[0031] Here, the space between the upper die 22 and the plate material WW includes not only the space directly above the plate material WW, but also the space above the hole through which the punched plate material WO is punched. Hereafter, the space between the upper die 22 and the plate material WW will be referred to as the space above the plate material.

[0032] The air supply device 3 may include, for example, an air inlet, an air supply passage, an air intake port, and a motor (none of which are shown). The air inlet is an air outlet having a diameter sufficient to supply air to the space above the plate material. The air supply passage is an air passage that guides the generated air to the air inlet. The air intake port is an air intake port. The motor is a device for increasing the pressure of the air taken in from the air intake port.

[0033] The air supply device 3 may operate based on a control signal from a control device (not shown). In this case, the air supply device 3 may operate by sequence control such as sequential control or time-delay control. For example, the air supply device 3 may operate when the control device detects that the stripper 25 has risen, or it may operate at regular intervals.

[0034] The air supplied by the air supply device 3 is air that creates pressure on the sheet metal WW in the direction of the lower mold 21. In other words, the air supplied by the air supply device 3 is air that can suppress the upward movement of the sheet metal WW in the direction of the upper mold 22. That is, the air supply device 3 supplies air to the space above the sheet metal.

[0035] The phenomenon of the sheet metal WW rising towards the upper die 22 is as follows: When the punch 26 punches out the sheet metal WW while the lower surface of the stripper 25 and the upper surface of the die 23 are gripping the sheet metal WW, the punch 26 then rises. At that time, the stripper 25 removes the sheet metal WW that has bitten into the punch 26. After that, the stripper 25 rises with a delay compared to the punch 26. The lifter 24 rises in conjunction with the stripper 25. The sheet metal WW is pushed up by the lifter 24 and rises, and is released from the die 23. Even during this process, the stripper 25 and punch 26 continue to rise, creating a space above the sheet metal. This space is under low pressure immediately after the stripper 25 rises, so air flows in from the periphery of the space above the sheet metal. This phenomenon is caused by the rising of the stripper 25 and punch 26, resulting in an upward airflow from the lower die 21 to the upper die 22 around the sheet metal WW. If the rigidity of the sheet metal WW is low, the sheet metal WW will rise along with this upward airflow.

[0036] The air outlet of the air supply device 3 may or may not face the space above the sheet metal. In other words, the air supply device 3 may supply air directly to the space above the sheet metal, or it may supply air indirectly to the space above the sheet metal. For example, the air supply device 3 may supply air not to the space above the sheet metal, but towards the stripper 25 or punch 26. In this case, the air from the air supply device 3 will collide with the stripper 25 or punch 26 and diffuse into the surroundings, causing some or all of it to flow into the space above the sheet metal.

[0037] The air supply device 3 may be located outside the press working device 2. Furthermore, the air supply device 3 may be portable or fixed. In other words, the air supply device 3 may be an independent device. When the air supply device 3 is located outside the press working device 2, it may supply air from the outside in the width direction of the sheet material WW toward the space above the sheet material. Here, the width direction of the sheet material WW may be perpendicular to the forward direction of the sheet material WW, or it may not be perpendicular. That is, the outlet of the air supply device 3 may be provided such that the forward direction of the sheet material WW and the air supply direction intersect on the sheet material WW. In other words, the air supply device 3 may supply air from the side guide direction toward the space above the sheet material. In Figure 2, the air supply device 3 is supplying air from the side guide direction toward the space above the sheet material.

[0038] The air supply device 3 may be located entirely outside the press working device 2, or a part of it may be located inside the press working device 2. Specifically, the air supply port of the air supply device 3 may be located inside the press working device 2, or it may be located outside the press working device 2. If the main body of the air supply device 3 is located outside and its air supply port is located inside the press working device 2, the air supply port is located inside the press working device 2 via an air supply passage. Here, the main body of the air supply device 3 refers to parts other than the air supply port and air supply passage, such as the intake port and the part equipped with a motor. In this case, the air supply passage may be provided on the lower surface of the stripper 25 or the upper surface of the die 23. For this reason, a groove for arranging the air supply passage may be provided on the lower surface of the stripper 25 or the upper surface of the die 23. Alternatively, the air supply passage may be provided so as to penetrate the inside of the stripper 25 from the width direction of the sheet material WW, or so as to penetrate the inside of the die 23 from the direction of the sheet material WW.

[0039] A specific example of the arrangement of the air supply device 3 will be explained using Figure 3. Figure 3 is a schematic diagram of the press working system 1 according to this disclosure. In the press working system 1, the air supply port of the air supply device 3 is located on the upper surface or side surface of the die 23. The air supply port of the air supply device 3 is also oriented toward the upper die 22. Specifically, the air supply port of the air supply device 3 may be oriented toward the lower surface of the punch 26, or toward the space above the sheet metal. That is, in Figure 3, the air supply device 3 supplies air to the lower surface of the punch 26. Here, the air is supplied to the lower surface of the punch 26 through the hole created by punching the sheet metal WO. By supplying air to the lower surface of the punch 26, the air can be introduced into the space above the sheet metal.

[0040] Furthermore, the entire air supply device 3 may be located inside the press working apparatus 2. In other words, the air supply device 3 may be part of the configuration of the press working apparatus 2. In this case, the upper die 22 is provided with a through hole that penetrates the stripper 25 vertically as an air supply passage. In this case, the opening of the through hole provided on the lower surface of the stripper 25 becomes the air supply port of the air supply device 3. This allows the air supply device 3 to supply air to the space above the sheet metal through the through hole.

[0041] The press working system 1 may have multiple air supply devices 3, or it may have only one. In other words, the air supply device 3 may supply air to multiple spaces above sheet metal in the press working device 2, or it may supply air to the space above a single sheet metal. Specifically, the air supply device 3 may be located only downstream of the press working device 2, or it may be located at predetermined intervals from upstream to downstream of the press working device 2.

[0042] Thus, the press working system 1 according to this disclosure can suppress the upward movement of the sheet material WW in the direction of the upper die 22. That is, as described above, during punching, an upward airflow is generated inside the press working apparatus 2 from the lower die 21 to the upper die 22. This is mainly due to the upward movement of the stripper 25 and punch 26 after punching, which creates a low-pressure space between the stripper 25 and the sheet material WW, with a pressure lower than the pressure in the space where the press working apparatus 2 is installed. If the rigidity of the sheet material WW is low, the sheet material WW will rise along with this upward airflow. In other words, the sheet material WW will rise along with the upper die 22. This phenomenon increases the vertical movement of the sheet material WW. With the use of double-row cutting of products and the thinning of sheet material WW, this phenomenon is particularly likely to occur downstream of the press working apparatus 2.

[0043] Meanwhile, while the upper die 22 is rising, the feed device transports the sheet metal WW to the next process. If the sheet metal WW does not rise with the upper die 22, the sheet metal WW will be sent to the next process while in contact with the lifter 24. The feed device then stops feeding the material at a predetermined position, and the sheet metal WW is punched out by the next punch 26. However, if the sheet metal WW is fed by the feed device while rising with the upper die 22, when the feed device stops feeding the material, the sheet metal WW will flutter due to gravity causing it to descend and due to inertia. This fluttering of the sheet metal WW leads to a deterioration in the horizontal feeding accuracy of the sheet metal WW, which in turn causes feeding failures and reduces the productivity of the equipment.

[0044] This phenomenon will be explained using diagrams. Figure 4 is a schematic diagram relating to the upward movement of the sheet material WW. Figure 5 is a schematic diagram relating to the occurrence of fluttering of the sheet material WW. As shown in Figure 4, with the generation of an upward airflow, the sheet material WW rises along with the rise of the upper die 22. When the feed device attempts to move the sheet material WW to the next process while it is rising, the sheet material WW flutters as shown in Figure 5 due to gravity causing it to descend and inertial force when the feed device stops feeding the material.

[0045] To resolve the above problem, a technology has been disclosed that involves providing a pressing member on the upper die. However, providing a pressing member on the upper die increases the height of the upper die of the press working apparatus. As a result, there is a risk that the press working apparatus will become larger.

[0046] The press working system 1 described herein was developed to solve these problems. By providing an air supply device 3 that delivers air into the space above the sheet metal, it is possible to suppress the upward movement of the sheet metal WW in the direction of the upper die 22. This is because the air generates pressure on the sheet metal WW in the direction of the lower die 21. In other words, the air supply device 3 can suppress the pressure in the direction of the upper die 22 by supplying the air into the space above the sheet metal.

[0047] The press working system 1 according to this disclosure does not require a pressing member to be provided on the upper die 22. The air supply device 3 according to this disclosure only needs to be able to supply air to the space above the sheet metal, and can therefore be made smaller compared to a form such as a pressing member. Furthermore, by arranging the air supply device 3 outside the press working apparatus 2, further miniaturization can be achieved. As a result, the press working system 1 according to this disclosure can suppress the increase in size of the press working apparatus 2.

[0048] (Embodiment 2) Embodiment 2 of the present disclosure will be described below with reference to the drawings. Figure 6 is a schematic diagram showing a part of the press working system 1a according to the present disclosure. The press working system 1a according to this embodiment includes a press working apparatus 2 similar to that of Embodiment 1. In addition to the press working apparatus 2, the press working system 1a includes an intake device 4. That is, the press working system 1a according to this embodiment is the same as the press working system 1 according to Embodiment 1, except that the air supply device 3 is replaced with an intake device 4. The press working apparatus 2 according to this embodiment is the same as that of Embodiment 1, so its description will be omitted. Furthermore, the description of the intake device 4 below will also be omitted as appropriate if it overlaps with the description of the air supply device 3.

[0049] The intake device 4 is a device that sucks air from the space created between the lower die 21 and the sheet material WW. The intake device 4 is a device that sucks air from the space created between the die 23 and the sheet material WW when the lifter 24 and stripper 25 are raised after punching. The intake device 4 may also be a device that sucks air from the space when the sheet material WW is being transported. Furthermore, the intake device 4 may also be a device that sucks air from the space when the lifter 24 and stripper 25 are lowered during punching. In addition, the intake device 4 may also be a device that sucks air from the space around the die 23 and the sheet material WW even when there is no space between the die 23 and the sheet material WW. In other words, the intake device 4 may suck air at all times.

[0050] Here, the space between the lower die 21 and the plate material WW includes not only the space directly below the plate material WW, but also the space below the hole through which the punched-out plate material WO was punched. Hereafter, the space between the lower die 21 and the plate material WW will be referred to as the space below the plate material.

[0051] The intake device 4 may include, for example, an intake port, an intake passage, an exhaust port, and a motor (none of which are shown). The intake port is an air intake opening having a diameter sufficient to draw in air from the space below the plate. The intake passage is an air passage that guides the drawn-in air to the exhaust port. The exhaust port is the outlet for the drawn-in air. The motor is a device for creating a pressure difference with the space below the plate.

[0052] The intake device 4 may operate based on control signals from a control device (not shown). In this case, the intake device 4 may operate by sequence control, similar to the supply device 3.

[0053] As described in Embodiment 1, the air drawn in by the intake device 4 is air that generates pressure on the plate material WW in the direction of the upper mold 22. Therefore, by drawing in this air, the intake device 4 can suppress the upward movement of the plate material WW in the direction of the upper mold 22.

[0054] The intake port of the intake device 4 may be directed directly towards the space below the sheet metal, or it may not be directed directly towards the space below. For example, the intake device 4 may draw in air by directing its intake port towards the die 23 or the die hole 231. Even in this case, the intake device 4 can also draw in air from the space between the die 23 and the sheet metal WW.

[0055] The intake device 4 may be located outside the press working apparatus 2. Furthermore, the intake device 4 may be portable or fixed. In other words, the intake device 4 may be an independent device. When the intake device 4 is located outside the press working apparatus 2, it may draw air from the space below the sheet metal from the outside in the width direction of the sheet metal WW. In other words, the intake device 4 may draw air from the space below the sheet metal from the side guide direction. In Figure 6, the intake device 4 is drawing air from the space below the sheet metal from the side guide direction.

[0056] The intake device 4 may be located entirely outside the press working device 2, or a part of it may be located inside the press working device 2. Specifically, the intake port of the intake device 4 may be located inside the press working device 2, or it may be located outside the press working device 2. If the main body of the intake device 4 is located outside and its intake port is located inside the press working device 2, the intake port is located inside the press working device 2 via an intake passage. Here, the main body of the intake device 4 refers to parts other than the intake port and intake passage, such as the exhaust port and the part equipped with a motor. In this case, the intake passage may be provided on the upper surface of the die 23. Therefore, a groove for arranging the intake passage may be provided on the upper surface of the die 23. Alternatively, the intake passage may be provided so as to penetrate the inside of the die 23 from the width direction of the sheet material WW.

[0057] Furthermore, the intake device 4 may be located entirely inside the press working apparatus 2. In other words, the intake device 4 may be part of the configuration of the press working apparatus 2. In this case, the lower die 21 is provided with a through hole that penetrates the die 23 vertically as an intake passage. In this case, the opening of the through hole provided on the upper surface of the die 23 becomes the intake port of the intake device 4. As a result, the intake device 4 can draw in air from the space below the sheet metal through the through hole.

[0058] The press working system 1a may have multiple intake devices 4 or only one. In other words, the intake device 4 may draw in air from multiple spaces below sheet metal in the press working apparatus 2, or it may draw in air from the space below one sheet metal. Specifically, the intake device 4 may be located only downstream of the press working apparatus 2, or it may be located at predetermined intervals from upstream to downstream of the press working apparatus 2.

[0059] Thus, the press working system 1a according to this disclosure can suppress the upward movement of the sheet material WW in the direction of the upper die 22. That is, the press working system 1 according to Embodiment 1 can suppress the pressure in the direction of the upper die 22 by supplying air to the space above the sheet material with the air supply device 3. On the other hand, the press working system 1a according to Embodiment 2 can suppress the pressure on the sheet material WW in the direction of the upper die 22 by sucking in the air generated in the space below the sheet material in the direction of the upper die 22.

[0060] (Other embodiments) In Embodiment 1, an air supply device 3 is used, and in Embodiment 2, an air intake device 4 is used. However, in other embodiments, both may be used in combination. That is, an air supply device 3 that delivers air to the space above the plate material and an air intake device 4 that draws in air from the space below the plate material may be used. This makes it possible to further suppress the pressure on the plate material WW in the direction of the upper mold 22.

[0061] This disclosure is not limited to the embodiments described above, and may be modified as appropriate without departing from its spirit. [Explanation of Symbols]

[0062] 1 Press working system, 1a Press working system, 2 Press working device, 3 Air supply device, 4 Air intake device, 21 Lower die, 22 Upper die, 23 Die, 24 Lifter, 25 Stripper, 26 Punch, 27 Side guide, 231 Die hole, 232 Holding part, 241 Contact part, 242 Elastic body, 251 Punch hole, WW Sheet material, WO Punched sheet material

Claims

1. When the stripper on the upper die, which presses a sequentially fed sheet metal between an upper die and a lower die, rises, a gas is supplied to the space between the upper die and the sheet metal, generating pressure on the sheet metal in the direction of the lower die. Air supply device.

2. Gas is supplied from the lower die to the lower surface of the punch provided in the upper die. The air supply device according to claim 1.

3. When the stripper provided on the upper die, which presses a sequentially fed sheet metal between an upper die and a lower die, rises, air is drawn into the space between the lower die and the sheet metal to generate pressure on the sheet metal in the direction of the upper die. Intake device.

4. A processing device that presses a sequentially fed sheet metal using an upper die and a lower die equipped with a punch and a stripper, A gas supply device that delivers gas to generate pressure in the direction of the lower die against the plate material in the space created between the upper die and the plate material when the stripper rises, A processing system equipped with the following features.

5. A processing device that presses a sequentially fed sheet metal using an upper die and a lower die equipped with a punch and a stripper, An air intake device that draws in air to create pressure in the direction of the upper die against the plate material in the space created between the lower die and the plate material when the stripper rises, A processing system equipped with the following features.

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