JP4041247B2 - Method for pressing film-like processed material, and press apparatus used for carrying out the pressing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention reciprocates the slide with the upper die fixed against the bed bolster with the lower die fixed, and the workpiece is subjected to shearing, bending, drawing, forming, joining, and compression in advance. A numerical controller that can be continuously operated according to the NC program createdWhere to use and implementMethod for pressing film-like processed materialAnd press apparatus used for carrying out the methodAbout. In particular, a pressing method capable of pressing a film-like processed material with a partial die obtained by dividing one press shape into predetermined shapes,And press apparatus used for carrying out the methodAbout.
[0002]
[Prior art]
A press machine is known as a processing apparatus that punches a plate-like processed product into a desired shape or bends it into a desired shape efficiently and in large quantities. The press machine is classified into several types according to the power source, the operating mechanism, the shape of the frame, and the like. Among such press machines, a press machine is known that includes a bolster fixed to a machine base that is horizontally installed, and a slide that is opposed to the bolster and reciprocates. A lower die of a pair of dies that is a female die is attached to the bolster, and an upper die of a pair of dies that is a male die is attached to the slide.
[0003]
Specifically, four guide posts are inserted into upper and lower frame plates provided on a hollow box frame-like machine base, and a slide is attached and fixed to the upper end portion of the guide post. A bolster is fixed to the frame plate. Then, the workpiece is placed on the lower mold attached to the bolster, and the slide is moved down at a predetermined speed by moving the guide post to press the workpiece.
[0004]
When processing a film-like workpiece with this type of press machine, a pair of reels are provided across the press section formed by the lower mold and the upper mold, and the workpiece is fed from one reel to the press section. Then wind up the other reel and collect it. A pair of feeders and clampers are provided across the press section, and the pressed part is moved from the predetermined initial position to the delivery side position while being clamped by the clamper each time one press is performed. Send it out. Then, the clamper is opened and the feeder is moved to the initial position, and then the clamper is closed again to grip the workpiece, and the next press is performed.
[0005]
For example, when the press shape shown in FIG. 9 is to be formed on the film-like processed material 9, a pair of gold corresponding to a shape in which extremely fine round holes are gathered in 8 rows and 8 rows. Molds are prepared and attached to the bolster and slide. In the case of pressing such a film-shaped workpiece 9, in order to perform another processing while further automatically feeding out the film-shaped workpiece 9 in the next manufacturing process after the press processing, Each of the press shapes must be pressed in place. Therefore, the sprocket 91 is continuously provided in advance on both edges of the workpiece, or is punched at the same time as a press having a desired shape.
[0006]
A mold for pressing the film-like workpiece is formed with a guide pin that engages with the sprocket 91 to position the workpiece with the previous one press shape. With this guide pin, the next one press process is positioned with respect to the one press shape formed by the previous one press process so as to align with the sprocket 91. Then, the workpiece 9 is clamped by a clamper provided with the press portion interposed therebetween, and when the next one press shape is pressed, the slide is lowered at a predetermined speed to press and punch the workpiece. As a result, precise parts are also pressed one after another at an accurate interval, and pressed with higher accuracy. At this time, when punching out the sprocket, the die is sized to include two press shapes, and the die and guide pin of the desired press shape are arranged in the first half with respect to the feed direction of the workpiece of the die. A sprocket mold is formed in minutes.
[0007]
[Problems to be solved]
By the way, in recent years, as represented by, for example, parts in the semiconductor industry, the degree of integration of parts has increased and has become complicated, so that the molds for manufacturing them have become more precise and larger in size. For example, in the press shape shown in FIG. 9, the diameter of each hole is 1 mm or less, the pitch of each hole is several millimeters, and the pitch of the shape formed by a plurality of holes is several mm to several tens mm. is there. Such a precise and large mold is difficult to manufacture, and therefore must be expensive. In addition, the life cycle of the product is becoming shorter, so it may be necessary to discontinue the manufacture of the product and dispose of the mold before such an expensive mold is fully used up to the end of its life. is increasing. In addition, when a sprocket mold is provided in this mold, the mold becomes nearly double as described above, and the weight also increases. For this reason, it becomes difficult to mount the mold and the workability is lowered.
[0008]
In the present invention, one desired press shape is equally divided in the direction of feeding a film-like processed material.,Using a pair of molds (hereinafter referred to as partial molds) having a partial shape of the desired press shape, the one press shape is pressed by a plurality of shots, and the desired press shape is continuous. The machine and the control device, which can perform pressing with high accuracy.Of film-like processed materialPressing methodAnd press apparatus used for carrying out the pressing methodThe main purpose is to provide Various advantages of the specific configuration of the present invention will be described in the embodiments of the present invention.
[0009]
[Means for solving the problems]
  The present invention1st inventionThe pressing method is(1) A pair of a desired press shape that is equally divided in the direction of feeding a film-like processed material, and having a partial shape of the desired press shapePartial dies are attached to the bolster and slide, respectively, and one desired press is made by multiple shots.The process to be performed as one press process, the press process is continuously performed,Multiple desired press shapesTheA method for pressing a film-like workpiece that is less processed, wherein (A) the feeders 72R and 72L that pitch-feed the film-like workpiece 9 are positioned at predetermined initial positions, (B) feeder72R,The feeder clampers 76R and 76L fixed to 72L are closed and the workpiece 9 is clamped.The aboveGuide pins 78 provided on the feeder clampers 76R and 76LSaidA step of engaging with a sprocket 91 provided on the workpiece 9 and positioning with respect to the previous one press step, (C) when the number of press shots n in one press step is other than the preset number of shots M Lowers the slide 6 to a predetermined bottom dead center U1 at a predetermined moving speed S, and presses the shape of the part onto the clamped workpiece 9The aboveThe step of raising the slide 6 and feeding the workpiece 9 by a predetermined pitch P1, (D) the number of press shots n isSaidWhen the number of shots is M,SaidChange to bottom dead center U2 deeper than bottom dead center U1Said(E) a step of lowering the slide 6 at the predetermined moving speed S to the changed bottom dead center U2 to press the partial shape on the clamped workpiece 9 and punching out the sprocket 91;SaidA step of repeating the steps (C) to (D) up to the number of shots N based on the number of divisions of the mold 3, (F) after the one pressing step,SaidA step of feeding the workpiece 9 by a predetermined amount P2 and positioning the next one press step, (G) closing the fixed clampers 77R and 77L while applying a predetermined tension T,A step of clamping the workpiece 9 and opening the feeder clampers 76R and 76L, and (H) a step of repeating the steps (A) to (G) until the end of all press working.It is characterized by that.
[0010]
In addition, the present inventionSecond inventionThe pressing method is(2)Attaching the partial molds to a bolster and a slide, and pressing one desired press shape by multiple shotsThe process to be performed is one press process, and the press process is performed continuouslyMultiple desired press shapesTheA method for pressing a film-like workpiece that is less processed, wherein (A) the feeders 72R and 72L that pitch-feed the film-like workpiece 9 are positioned at predetermined initial positions, (B) feeder72R,Close the feeder clampers 76R and 76L fixed to 72LSaidWhile clamping the workpiece 9The aboveGuide pins 78 provided on the feeder clampers 76R and 76LSaidA step of engaging with a sprocket 91 provided on the workpiece 9 and positioning with respect to the previous one press step, (C) the number of shots in which the number of press shots n in one press step is based on the number of divisions of the mold 3 The slide 6 is moved down to a predetermined bottom dead center U1 at a predetermined moving speed S until it reaches N, and the clamped workpiece 9 is pressed and then lifted.SaidA step of repeatedly feeding the workpiece 9 to a predetermined pitch P1, (D) the number of press shots n in one press step isBased on the number of divisions of the moldWhen the number of shots reaches N,SaidChange to bottom dead center U2 deeper than bottom dead center U1SaidSlide 6 at a predetermined moving speed SSaid changedA step of lowering to the bottom dead center U2 to press the part of the clamped workpiece 9 and punching out the sprocket 91;Said changedFixed at the bottom dead center U2.SaidThe upper mold 32 of the mold 3SaidTension T set while projecting on workpiece 9SaidAfter the feeders 72R and 72L are positioned at predetermined initial positions while being applied to the workpiece 9,SaidA step of closing the feeder clampers 76R, 76L and raising the slide 6, (F) after the one pressing stepIn additionA step of feeding the work material 9 by a predetermined amount P2, positioning the next one press step, and (G) repeating the steps (C) to (F) until the end of all press work.It is characterized by that.
[0011]
In view of the above object, the present invention(3)It is fixed to the machine base 1 placed horizontally, and one desired press shape is equally divided in the direction of feeding the film-like workpiece 9,A bolster 2 to which a lower mold 31 of a pair of molds 3 having a shape of a part of the desired press shape can be attached, and arranged on the top of the bolster 2 so as to be positioned by a position detector 53 and at a predetermined moving speed. To reciprocate vertically between a predetermined top dead center and bottom dead center,SaidA slide 6 to which an upper mold 32 corresponding to the lower mold 31 can be attached;SaidA position detector is provided so as to sandwich a press portion formed by the lower die 31 and the upper die 32 and to apply tension mechanisms 74 and 75 for applying a predetermined tension to the workpiece 9 and to sandwich the press portion. While positioning with 79RS and 79LSSaidFeeders 72R and 72L for feeding the workpiece 9 at a predetermined pitch;SaidFeeder clampers 76R and 76L including guide pins 78 that are fixed to the feeder 72L and guide the workpiece 9 by engaging with the sprocket 91, and a pair of fixings provided outside the feeder clampers 76R and 76L with the press portion interposed therebetween. Clampers 77R, 77L and at leastSaidMovement speed S, multipleSaidIncluding setting means 81 and 82 for setting bottom dead centers U1 and U2 and a plurality of pitches P1 and P2,SaidAccording to the required process sequence based on pitches P1, P2, moving speed S, bottom dead center U1, U2.SaidSynchronize the slide 6, the feeders 72R and 72L, the feeder clampers 76R and 76L, and the fixed clampers 77R and 77L.SaidAnd a control device 8 that controls the mold 3 to press one desired press shape by a plurality of shots.A press apparatus used for carrying out the method for pressing a film-like workpiece according to (1) or (2) is characterized.
[0012]
AndPreferably,The pressing apparatus according to (3) above isA guide post 4 composed of four columns is provided to transmit the driving force of the motor that moves the slide 6 to the slide 6 or to guide the movement of the slide 6.It is characterized by that. Also,Desirably, a magnet plate 52 including a plurality of magnets arranged on each of the four guide posts 4 or a coil yoke including an excitation coil wound by a predetermined number of turns, and the magnet plate 52 attached to the machine base 1 or the aforementioned A linear motor 5 is provided which is composed of a coil yoke 51 or a magnet plate disposed opposite to the coil yoke.It is characterized by that.Preferably, an imaging device that captures the processing state of the workpiece 9, an image processing device that measures a pitch based on an image captured by the imaging device, and a plurality of the pitches that are measured within a predetermined time. A monitoring device 10 is provided that includes a control device that obtains an average value and obtains an error from the command value and controls the error to be zero.It is characterized by this.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the present invention.Used to implement the pressing methodAn overall embodiment of a press device is shown. FIG. 2 is a plan view seen from the top of the pressing apparatus shown in FIG. FIG. 3 shows a schematic configuration of an apparatus for controlling the press working of the press apparatus shown in FIG. FIG. 6 shows the present invention.Implement the pressing methodAn example of a partial die used in a press apparatus is shown, and in FIG. 7, the press operation of the work material and the feed operation of the work material are performed in synchronization with each other.Implement the pressing methodAn example of the control of the numerical control device of the pressing device is shown.
[0014]
As shown in FIG. 1, the machine base 1 of the mechanical part of the press device is configured in a box shape with an upper surface plate 11, a lower surface plate 12, and four side plates 13, and is placed on a floor surface with legs 14. The bolster 2 is fixed to the upper surface plate 11, and a die (lower mold) 31 of a pair of partial molds 3 is attached to the bolster 2.
[0015]
As shown in FIG. 2, four guide posts 4 are provided, and are inserted into through holes provided at four corners of the upper surface plate 11 so as to be reciprocally movable. Similarly, the guide post 4 is inserted into the lower surface plate 12 so as to be reciprocally movable. A guide (not shown) is provided in a portion where the guide post 4 and the upper and lower plates 11 and 12 penetrate, and guides the reciprocating movement of the guide post 4 to prevent displacement and distortion in the horizontal direction. As shown in FIG. 1, in this embodiment, the guide post 4 is moved by a linear motor 5. Specifically, a coil yoke 51 is provided along the guide post 4 in the machine base 1, and a magnet plate 52 is attached to a side surface portion of the guide post 4 facing it via an attachment plate (not shown). When a predetermined current is passed through the coil and excited, a magnetic force is generated between the coil yoke 51 and the magnet plate 52, and the guide post 4 is moved.
[0016]
The slide 6 is fixed to the upper end portion of the guide post 4, and a punch (upper die) 32 facing the die 31 of the pair of partial molds 3 is attached. Therefore, the slide 6 attached to the guide post 4 descends downward, and the workpiece 9 positioned on the die 31 attached to the bolster 2 is pressed into a desired press shape by the punch 32 attached to the slide 6. Punched out. In this way, the four guide posts 4 arranged in a well-balanced manner allow the slide 6 to move with a high degree of straightness, with a precise position and path controlled and stably moved, so that high-precision pressing can be performed. Further, since the slide 6 stably moves at a high acceleration and a high speed by the linear motors 5 evenly arranged on each of the guide posts 4, even a relatively flexible work material can be surely and highly secured. The workpiece is pressed with high accuracy.
[0017]
The feed mechanism 7 for the workpiece 9 includes a reel 71 on the delivery side, feeders 72R and 72L for pitch-feeding the workpiece 9, a reel 73 for winding the workpiece 9 sent from the feeder, and the workpiece 9 Tension mechanisms 74 and 75 for applying a predetermined tension and the workpiece 9 are held at a predetermined tension.RufuIt includes feeder clampers 76R and 76L respectively provided on the feeder 72R and feeder 72L, and fixed clampers 77R and 77L for holding and holding the workpiece 9 in order to feed the workpiece 9 after being pressed.
[0018]
In the case of the partial mold 3, unlike the general mold, the sprocket mold is provided close to the desired press-shaped mold. Therefore, the mold does not increase in size or weight. As a result, it is easy to attach the mold to the bolster or the slide, and it is easy to manufacture the mold, which is economical. However, on the other hand, guide pins that are inserted into the sprocket and positioned cannot be provided in the mold. For example, as shown in FIG. 6, a male die 34 for making a sprocket 91 that is made 0.5 mm shorter than other shapes on a punch 32 is close to a male die 33 having a required press shape. Provided. As a result, guide pins cannot be provided on the mold.
[0019]
Therefore, a guide pin 78 is provided on the feeder clamper 76L so that when the feeder clamper 76L is closed, the guide pin 78 is inserted into the sprocket 91 that has been driven in the press of the previous one press shape. is doing. According to this configuration, positioning is performed during the previous one press step, and the accuracy with respect to the alignment between the sprocket 91 and the desired press shape is ensured. For this reason, even if it is a partial metal mold | die, a high press shape precision can be obtained. The film-like processed material 9 is inserted into the feeder 7 with the guide pin 78 inserted into the sprocket 91 and positioned.2R, 72L is sequentially fed at each press at a predetermined pitch.
[0020]
The numerical controller 8 is installed adjacent to the press machine. The numerical control device 8 is provided with an input device 81 including a keyboard, a switch, and a magnetic disk drive. The pitch of the partial die of the workpiece 9 for equally dividing the press shape and pressing it, and the pitch between the press steps The moving speed of the slide 6, the normal bottom dead center of the slide 6, the bottom dead center at the time of change, the number of press processes, and the like are input. The top dead center of the slide 6 may be a limit position where the slide 6 can move, but is preferably set in the same manner as the bottom dead center. The moving speed of the slide 6 is automatically set to a specific initial value when no numerical value is input.
[0021]
FIG. 3 shows a schematic configuration of the numerical control device 8 and other devices. The numerical control device 8 includes a storage device 82 and an arithmetic device 83. The input device 81 and the storage device 82 constitute setting means, and these setting values are directly stored in the storage device 82 by directly inputting numbers. Further, as the NC program, these set values and a series of processes can be programmed and recorded on a magnetic disk or the like, and data of a press performed once can be stored. In this way, when processing the same or approximate press shape, there is no need to newly reset various set values of the press from the beginning. A command value is output from the arithmetic unit 83 including the CPU and memory of the numerical control device 8, and the movement of the slide 6, the movement of the feeders 72R and 72L, and the opening and closing of the feeder clampers 76R and 76L are performed via the drive control device 84. And the opening and closing of the fixed clampers 77R and 77L are controlled synchronously.
[0022]
The slide 6 is driven by four linear motors 5 provided on each guide post via four guide posts 4. Each linear motor 5 is provided with a linear scale 53 which is a position detector. Then, each linear motor 5 is positioned and controlled based on the feedback signal obtained from these linear scales 53, and the movement is controlled with high accuracy based on the set moving speed and bottom dead center position.
[0023]
The reel 71 and the reel 73 are repeatedly rotated and stopped in accordance with the movement of the feeders 72R and 72L depending on the positions of dancer rollers provided in the tension mechanisms 74 and 75. The dancer rollers of the tension mechanisms 74 and 75 can automatically adjust the tension of the workpiece 9 to a set value by changing the position of the weight.
[0024]
The feeders 72R and 72L are moved by linear motors 79R and 79L, respectively. The linear motors 79R and 79L are also driven in accordance with a command value sent from the numerical control device 8 via the drive control device 84. Positioning control is performed by obtaining feedback signals respectively detected by the linear scales 79RS and 79LS which are position detectors. By this method, the feeder operation is performed more accurately, and even if a partial die is used, the pitch between processed parts is positioned with high accuracy, and compared with the case where a single press shape is a total die. Desired pressing can be performed without inferior accuracy.
[0025]
At this time, the feeder clampers 76R and 76L and the fixed clampers 77R and 77L are respectively connected to the drive control device 8.4It is opened and closed by driving an actuator (not shown) via The opening / closing operation is controlled in synchronization with the feeding operation of the workpiece 9. The drive control device 84 is illustrated as one device for convenience of explanation, but in reality, it is provided for each drive portion.
[0026]
Thus, each of the four linear motors 5 is provided with a position detector, and each of the two linear motors 79R, 79L is provided with a position detector.79RS, 79LSIs provided and is controlled by the numerical control device 8, so that the slide 6 is moved by the linear motor 5, the feeder 72R is moved by the linear motor 79R, and is moved by the linear motor 79L. The feeder 72L moves synchronously while being positioned with high accuracy. Therefore, even when one desired press shape is processed by a plurality of shots using a partial die, the desired press shape can be obtained with high accuracy.
[0027]
For example, as shown in FIG. 7, the press operation and the feeder operation of the workpiece 9 are performed in synchronization. In the example shown in FIG. 7, the feeders 72 </ b> R and 72 </ b> L send the workpiece 9 immediately after the slide 6 descends and presses the workpiece 9 and then immediately starts to rise. In the meantime, the slide 6 starts to descend without being interrupted in the middle after ascending, and the feeders 72R and 72L finish feeding one pitch. When controlled in this way, the workpiece 9 is continuously pressed, so that one shot and one press step (8 shots in the case of FIG. 7) do not need to take time. In the press-shaped press work shown in FIG. 6, at the last eighth shot, the bottom dead center is set deeper by 0.5 mm and the sprocket 91 is punched out. At this time, the numerical controller 8 also controls the “removal” operation of the film-like workpiece 9 by the feeder clampers 76R and 76L and the fixed clampers 77R and 77L.
[0028]
In this embodiment, a monitoring device 10 including functions of an imaging device, an image processing device, a display, and a numerical control device 8 is provided. The monitoring device 10 is configured so that even when the press shape is small, the image of the imaging device that captures the press portion is image-processed by the image processing device and displayed on the display, thereby monitoring the press state. Is done. In addition, the image processing apparatus binarizes the video to clearly reproduce the post-press contour, displays it on the display in a superimposed manner with an accurate desired shape of the press stored in advance, The numerical value of the generated part can be displayed. A large number of pitch errors obtained based on this data can be stored in the storage device, and the holding operation and feed correction as described above can be performed. In this embodiment, there is provided a control device for obtaining an average value of a plurality of pitches measured within a predetermined time, obtaining an error from the command value, and controlling the pitch error to be zero. And in this embodiment, although the control apparatus is the numerical control apparatus 8, you may install separately.
[0029]
FIG. 8 shows the relationship between the tension of a certain film-like processed material 9 and how it extends. This example is a polyimide film having a width of 35 mm, a thickness of 0.115 mm, and a length of 100 mm. The temperature of the film at this time is 20 ° C. Since this data changes depending on the temperature, material, thickness, manufacturing variation, storage state, and the like, there is a possibility that the data will gradually change during continuous processing. In the press device, since the position where the workpiece 9 is clamped and fed is different from the position where the workpiece is pressed, the amount of elongation changes even if the workpiece is stretched with a constant tension, resulting in a large machining pitch error. Therefore, the pitch measured by the image processing device is input to the numerical control device 8, an average value is obtained from a plurality of measured pitches stored within a predetermined time, and an error from the command value is obtained. By controlling the feeders 72R and 72L so that the value becomes zero, the workpiece can be fed with higher accuracy.
[0030]
FIG. 4 shows the present invention shown in FIG.One embodiment of enabling the implementation of the pressing methodA method of pressing a film-like workpiece with a partial die by a pressing device is shown with a focus on the processing operation of a machine based on the control of a numerical control device. Before pressing, the die 31 of the partial mold 3 is attached to the bolster 2 and the punch 32 of the partial mold 3 is attached to the slide 6. Then, the fixed clampers 77R and 77L are closed and fixed so that the film-like processed material 9 is stretched around the press portion formed by the die 31 and the punch 32 (S1).
[0031]
First, the feed pitches P1 and P2 of the feeders 72R and 72L necessary for the desired pressing process, the moving speed S of the slide 6, the bottom dead center U1 and the bottom dead center U2 after the change, 1 the number of shots N in the pressing process, The number M of M-th shots in one press process and the tension T applied by the tension mechanisms 74 and 75 are input from the input device 81 and set (S2). These set values can be programmed in advance in the NC program. At this time, in order to count the number of press shots in one press process, the count value of the counter is reset to 0 (S3). When the moving speed of the slide 6 is not input by the operator, a specific initial value is automatically set. Further, although it is desirable to input the top dead center of the slide 6, the slide 6 is controlled based on a predetermined limit position even if there is no set value.
[0032]
In one pressing step, first, the feeder-side feeder 72R and the collecting-side feeder 72L are positioned at the initial position on the most delivery side in the required order. In the case of the press machine having the structure shown in FIG. 1, it is set on the right side as viewed from the front (S4). At that position, the feeder clampers 76R and 76L are closed to clamp the workpiece 9 (S5). In this state, the weight of the dancer roller of the tension mechanism is adjusted so that the workpiece 9 is slightly tensioned (S6), thereby preventing the influence on the feeding operation of the feeder. Next, the fixed clampers 77R and 77L are opened so that the workpiece 9 can be pitch fed (S7).
[0033]
Next, after setting the bottom dead center to the set value U1 (S8), the number of press shots n is counted up (S9). Here, the setting value of the bottom dead center is set to U1 when the setting value U1 of the bottom dead center has been changed first. Therefore, when the setting value of the bottom dead center is already U1, This means that the bottom dead center setting value is not changed. Then, except for the case where the number of press shots n is the preset number of shots M in one press process (S10), the press operation is performed in this state (S12). The number M of shots is set when the sprocket 91 is punched and depends on the shape of the mold to be manufactured. For example, in the case of the partial mold and the press shape shown in FIG. 6, the number M of shots is 8 because the partial mold 3 indicated by oblique lines is manufactured in a U shape.
[0034]
When the count value of the number of press shots is the predetermined number of shots M, the bottom dead center is changed to U2 according to the change command (S11), and the press is performed deeper than other press operations (S12). Since the change of the bottom dead center is a process for punching out the sprocket 91 as described above, the value of the changed bottom dead center U2 is the mold part 33 for the sprocket provided in the partial mold 3. Is greatly dependent on how short it is made relative to the press-shaped mold part 34. In the example of the partial mold 3 shown by the oblique lines in FIG. 6, it greatly depends on how short the sprocket mold part 34 is manufactured with respect to the press-shaped mold part 33. In the case of the upper mold 32 of the partial mold shown in FIG. 6, since the sprocket mold part 34 is made 0.5 mm shorter, the initial set value of the bottom dead center is 10 as shown in FIG. If it is 0.0 mm, it is changed to 10.5 mm.
[0035]
In this embodiment, in this embodiment, the linear motor 5 is driven at a set speed, the slide 6 is lowered to a predetermined bottom dead center, the workpiece 9 is punched out, and the linear motor 5 is immediately driven in the upward direction. The slide 6 is raised to the top dead center. Then, after the slide 6 finishes rising, or immediately after the mold 3 comes out of the workpiece 9, the feeder 72R, 72L is actuated to feed the workpiece 9 with the set pitch P1 (S13). At this time, a fixed tension set between the clampers 76R and 76L is applied to the film-like processed material 9, and pitch feed is performed. In the repeated press, the partial mold 3 is used. Nevertheless, high press shape accuracy can be obtained.
[0036]
After one press process, before starting mass production, as a trial, measure the error using the monitoring device 10 and correct the NC program or change the set value via the input device to correct it Can be done. Then, after repeating this operation until the desired error range is reached, mass production can be performed in that state.
[0037]
When one press process is not completed (S14), the number of press shots n is counted up (S9), and the next press is performed. On the other hand, when the number of press shots n reaches the number of press shots N in one press process and one press process is completed (S14), the pitch P2 workpiece 9 necessary for positioning with the next one press process 9 (S15), and the tension control mechanisms 74 and 75 apply a predetermined tension T to the workpiece 9 (S16). At this time, the pitch P2 between the previous one press step and the next one press step is usually the same feed amount, but the positional relationship between the desired press shape and the sprocket 91 and the film-like workpiece It may be corrected by the relationship with the elongation of 9, etc., and is not always the same value.
[0038]
Next, in a state where the workpiece 9 is under tension, the fixed clampers 77R and 77L are closed (S17), then both feeder clampers 76R and 76L are opened to release the holding of the workpiece 9 and at the same time guide pins Is removed from the sprocket 91 and unclamped (S18), and the workpiece 9 is moved. Here, if the entire processing of the press has been completed (S19), the film-like processed material 9 is wound around the reel 73, and the processing ends. When the next one-press shape is pressed, the count-up is reset (S3), and the feeders 72R and 72L are moved again to the initial positions on the sending side (S4).
[0039]
As described above, according to the method for pressing a film-like workpiece according to the present invention, the press operation, the feed operation, and the gripping change operation are performed accurately in synchronism. Even if one desired press shape is continuously pressed by a plurality of shots using such a partial die, the press can be performed with an acceptable high accuracy.
[0040]
FIG. 5 shows a second difference from the method shown in FIG.In the press method of the present invention, the same as described abovePartial moldUse ofThus, an embodiment of a method for pressing a film-like workpiece is shown. Detailed description of steps similar to those shown in FIG. 4 is omitted. The die 31 of the partial mold 3 is attached to the bolster 2, and the punch 32 of the partial mold 3 is attached to the slide 6. First, setting values necessary for a desired pressing process are input from the input device 81 and set (S1). At this time, the count value of the counter is reset to 0 (S2).
[0041]
In one press process, the feeders 72R and 72L are first positioned at the initial position on the most delivery side in the programmed order (S3). At that position, the feeder clampers 76R and 76L are closed to clamp the workpiece 9 (S4). In this state, the weights of the dancer rollers of the tension mechanisms 74 and 75 are adjusted so that the workpiece 9 is slightly tensioned (S5), thereby preventing the influence on the feeder feeding operation. Then, the number of press shots n is counted up (S6), and when the number of press shots has not reached the number of shots in one press process (S7), the press operation is performed in this state (S8).
[0042]
In this embodiment, in this embodiment, the linear motor 5 is driven at a set speed, the slide 6 is lowered to a predetermined bottom dead center, the workpiece 9 is punched out, and the number of press shots n is one press step. If the number of press shots N has not been reached, the linear motor 5 is immediately driven in the upward direction to raise the slide 6 to the top dead center (S8). Then, after the slide 6 finishes rising, or immediately after the mold 3 comes out of the workpiece 9, the feeder 72R, 72L is operated, and the workpiece 9 is fed at the set pitch P1 (S9).
[0043]
When the count value of the number of press shots n has reached the number of press shots N in one press process (S7), it is changed to the bottom dead center U2 based on a preset value (S10). Press deeply (S11). At this time, the slide 6 is moved down to punch out a desired shape and sprocket into the workpiece 9, and then the slide 6 is stopped at the bottom dead center U <b> 2. Keep it clamped. In this state, the feeder clampers 76R and 76L are opened to release the workpiece 9 (S12).
[0044]
When all the press work is completed (S13), the slide 6 is raised, the upper die 32 is extracted from the work material 9, the reels 71 and 73 are driven, the work material 9 is wound up, and the process is finished (S14). On the other hand, if there is a next one press step (S13), the counter is reset to 0 (S15). Then, the tension T set to the workpiece 9 is applied by the tension mechanisms 74 and 75 (S16). Next, with the workpiece 9 positioned by the upper mold 32 and the feeder clampers 76R and 76L being opened, the feeders 72R and 72L are moved to their initial positions (S17), and the feeder clampers 76R and 76L are closed again. Then, the workpiece 9 is clamped (S18).
[0045]
Then, the weights of the tension mechanisms 74 and 75 are adjusted so that the tension becomes weak, and the tension applied to the workpiece 9 is set to a small value (S19). In this way, the slide 6 is raised (S20), and the bottom dead center is returned to the set value U1 (S21). Finally, the workpiece 9 is fed at a pitch P2 in order to provide a distance between the previous one press process and the next one press process (S22), and then the next press process is performed. In addition, when a space | interval is unnecessary between 1 previous press process and the next 1 press process, it is unnecessary to send pitch P2.
[0046]
According to the pressing method of this embodiment, since the upper die is used as a guide instead of the guide pin, the bolster and micron-order accuracy of the die with respect to the guide pin can be obtained without sacrificing the press accuracy. Eliminates the need for mounting on slides. As a result, there is an advantage that it is not necessary to provide a guide pin and the operation becomes easier.
[0047]
【The invention's effect】
As described above in detail, according to the present invention, there is provided a product obtained by pressing a film-like workpiece with sufficiently acceptable accuracy and time that is almost the same as the case of using a partial mold even when a partial mold is used. And the manufacturing time of the mold is shortened. As a result, the cost can be further reduced. In particular, in prototypes where mass production of products has not yet been decided, even if the ratio of molds in one-pitch machining is kept low, selection can be made to increase the ratio as production increases. But there is an effect that the mold can be used effectively. Also, as usual, you can also use a total mold, so you can selectively use a total mold and a partial mold, such as using a total mold for simple press-shaped pressing. This is advantageous in that the width of utilization of press working can be broadened.
[Brief description of the drawings]
FIG. 1 shows a press according to the present invention.MethodIt is a surface view in which the whole schematic structure of preferred embodiment of is shown.
FIG. 2 shows the press shown in FIG.Method embodimentIt is the top view which looked at from the upper side.
FIG. 3 is a diagram showing a control system of the numerical control device 8 shown in FIG. 1;
FIG. 4 shows the press shown in FIG.Method embodimentIt is a flowchart which shows operation | movement of this control apparatus.
FIG. 5 is a flowchart showing a second embodiment of a method for pressing a film-like workpiece using the partial mold of the present invention.
6 shows a press example shown in FIG. 2 in a working example of the press shown in FIG.Method embodimentIt is a top view by which the outline of a press part is shown typically.
FIG. 7 shows the press shown in FIG.Method embodimentmachineofSynchronizeThecontrolTheFigureThreeControl deviceIf done byOne of the methodsActionIt is a correlation diagram which shows an example.
FIG. 8 is a graph showing the relationship between tension and elongation of a certain film-like processed material.
FIG. 9 is a diagram showing an example of a press shape of a certain film-like processed material.
[Explanation of symbols]
1, Machine stand
2, bolster
3, mold 31, lower mold 32, upper mold
4, guide post
5, linear motor
51, coil yoke
52, magnet plate
6, slide
7. Feeding mechanism
71, 73, reel
72R, 72L, feeder
74, 75, tension mechanism
76R, 76L, feeder clamper
77R, 77L, fixed clamper
78, guide pins
8. Numerical control device
9. Work material
10. Monitoring device

Claims (6)

One desired press shape is equally divided in the direction of feeding a film-like workpiece, and a pair of molds having a part of the desired press shape is attached to a bolster and a slide, respectively, and a plurality of shots are performed. A method for pressing a film-like workpiece, wherein a step of pressing one desired press shape is set as one press step, the press step is continuously performed, and a plurality of desired press shapes are pressed.
(A) a step of positioning a feeder for pitch-feeding a film-like workpiece at a predetermined initial position;
(B) The feeder presser fixed to the feeder is closed to clamp the workpiece, and a guide pin provided on the feeder clamper is engaged with a sprocket provided on the workpiece to perform the previous one press step. Positioning between and
(C) When the number of press shots in one pressing step is other than the preset number of shots, the slide is lowered to a predetermined bottom dead center at a predetermined moving speed, and the shape of the part is formed on the clamped workpiece. Pressing and raising the slide and feeding the workpiece a predetermined pitch;
(D) When the number of press shots is the predetermined number of shots, the slide is moved to a bottom dead center deeper than the bottom dead center and the slide is lowered to the changed bottom dead center at a predetermined moving speed. Pressing the part of the clamped workpiece and punching out the sprocket,
(E) repeating the steps (C) to (D) up to the number of shots based on the number of divisions of the mold,
(F) a step of feeding a predetermined amount of the workpiece after the one press step and positioning the next one press step;
(G) a step of closing the fixed clamper while applying a predetermined tension to clamp the workpiece and opening the feeder clamper;
(H) A method of pressing a film-like processed material comprising the steps of repeating the steps (A) to (G) until the end of all press processing. One desired press shape is equally divided in the direction of feeding a film-like workpiece, and a pair of molds having a part of the desired press shape is attached to a bolster and a slide, respectively, and a plurality of shots are performed. A method for pressing a film-like workpiece, wherein a step of pressing one desired press shape is set as one press step, the press step is continuously performed, and a plurality of desired press shapes are pressed.
(A) a step of positioning a feeder for pitch-feeding a film-like workpiece at a predetermined initial position;
(B) The feeder presser fixed to the feeder is closed to clamp the workpiece, and a guide pin provided on the feeder clamper is engaged with a sprocket provided on the workpiece to perform the previous one press step. Positioning between and
(C) The clamped workpiece was pressed by lowering the slide to a predetermined bottom dead center at a predetermined moving speed until the number of press shots in one pressing step reached the number of shots based on the number of divisions of the mold. A step of raising and then repeating feeding the workpiece a predetermined pitch;
(D) When the number of press shots in one press step reaches the number of shots based on the number of divisions of the mold, the slide is changed to a bottom dead center deeper than the bottom dead center at a predetermined moving speed. Lowering to the changed bottom dead center, pressing the part of the clamped work piece and punching out the sprocket,
(E) The slide is fixed at the changed bottom dead center position, and the upper die of the mold is used as the workpiece. A step of raising the slide by closing the feeder clamper after positioning the feeder at the predetermined initial position while applying a tension set to the workpiece while protruding.
(F) a step of feeding a predetermined amount of the workpiece after the one press step and positioning the next one press step;
(G) A method of pressing a film-like processed material, comprising the steps of repeating the steps (C) to (F) until the end of all pressing. Fixed to a horizontally installed machine base, one desired press shape is equally divided in the direction of feeding a film-like workpiece, and a lower die of a pair of molds having a shape of a part of the desired press shape is formed. A bolster that can be mounted, and is disposed opposite to the upper portion of the bolster, and is reciprocated vertically between a predetermined top dead center and a bottom dead center at a predetermined moving speed while being positioned by a position detector. A slide to which an upper die corresponding to the die can be attached, a tension mechanism provided across a press portion formed by the lower die and the upper die, and applying a predetermined tension to the workpiece; and the press A feeder that is disposed oppositely across the section and feeds the workpiece at a predetermined pitch while being positioned by a position detector;
A feeder clamper fixed to the feeder and including a guide pin for engaging and guiding the workpiece with a sprocket;
A pair of fixed clampers provided on the outside of the feeder clamper with the press portion interposed therebetween, and at least the moving speed, a plurality of bottom dead centers, and a plurality of pitch setting means for setting the pitch, the moving speed The slide, the feeder, the feeder clamper, and the fixed clamper are synchronized according to a required process sequence based on the bottom dead center, and one desired press shape is pressed by the mold by a plurality of shots. A control device for controlling to
The press apparatus used for implementation of the pressing method of the film-form processed material of Claim 1 or Claim 2 provided with these. A guide post composed of four struts for transmitting the driving force of a motor for moving the slide to the slide or guiding the movement of the slide;
The press apparatus according to claim 3, comprising:
The motor includes a magnet plate arranged with a plurality of magnets provided on each of the four guide posts or a coil yoke including an excitation coil wound with a predetermined number of turns, and the magnet plate or the magnet plate attached to the machine base The press apparatus according to claim 4, wherein the press apparatus is a linear motor including a coil yoke or a magnet plate disposed to face the coil yoke. An imaging device that photographs the processing state of the workpiece, an image processing device that measures a pitch based on an image photographed by the imaging device, and an average value of the plurality of pitches measured within a predetermined time A control device for obtaining an error from a command value and controlling the error to be zero;
The press apparatus of Claim 3 provided with the monitoring apparatus which comprises these.

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