JPS63140729A - Blank stock holding device in transfer press - Google Patents

Abstract

PURPOSE:To surely hold a blank by the finger of a transfer feeding device and to enable the high speed running of a press by holding the blank by a plunger and descending it in a die stably in case of moving the blank punched from a blank stock to the die for working of the succeeding stage. CONSTITUTION:After feeding a blank iron plate 58 onto a die 8 an upper part plunger 36 starts its descent as well simultaneously with a slide 3 starting to descend from the upper dead center. When the slide 3 reaches the lower dead center position, the blank iron plate 58 is punched by a punch 4 and die 8 and worked in a blank stock 59, held between the upper part plunger 36 and lower part plunger 48 as well and simultaneously the lower part plunger 48 is synchronously descended as well. When it reaches the holding position between the fingers 12, 12 of the transfer feeding device in succession, the blank stock 59 is released from the upper and lower parts plungers and the blank stock 59 pinched by the fingers 12, 12 is transferred stably to the die of the succeeding sage.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a transfer press equipped with a mold device for several steps and a transfer feed device that grips and transfers a blank material with fingers to each of these steps. The present invention relates to a blank material holding device that holds a processed blank material, lowers it to a stable state, and reliably grips it with fingers.

<Conventional technology> Generally, in a transfer press, a blank material that is blanked and punched using a punch or die is
It is extruded by the extrusion pin and falls through the die,
The blank material gripping position is reached by the fingers of the feed bar, but the blank material falls naturally without any support from immediately after punching until the end of the fall.

<Problem to be solved by the invention> Therefore, depending on the circumstances of extrusion, etc., it does not always fall straight in a horizontal state, and it is normal for it to be in an unstable state immediately after falling. In operation, even if the blank is unstable, it is possible to grip the blank with the fingers and transfer it to the next process for transfer processing.

However, when the press machine operates at high speeds, if the blank is unstable, it is difficult for the fingers to grip the blank reliably and accurately, making it difficult to correctly position it in the mold section for the next process. However, there is a problem in that transfer processing is inconvenient.

Means for Solving the Problems> The present invention solves the above problems by holding a blank material immediately after blank processing between the upper and lower plungers, and in this state, removing the blank material from the finger section. It is possible to move to the material gripping position under stable conditions, that is,
In a transfer press that is equipped with a slide drive system using a crank mechanism and that sequentially transfers blanks to the next process using a feed bar equipped with fingers that grip and release blanks, the upper part is rotatable by a crankshaft installed in the upper frame. A vibrating arm is installed at the top so that it can vibrate via a cam device on the camshaft, and this vibrating arm is connected to an upper plunger that is loosely inserted into a punch that is installed on the slide side, and can also be rotated by a crankshaft. A vibration arm (which can vibrate via a cam device on a lower camshaft) is disposed at the bottom, and this vibration arm is connected to a lower plunger that is loosely inserted into a die disposed on the bolster side, facing the upper plunger. After the slide passes the bottom dead center due to the rotation of the crankshaft, both of these cam devices hold the blank between the upper plunger and the lower plunger and lower it to the blank gripping position with the fingers, and also lower the blank at the blank gripping position. Each piece is equipped with a cam that releases the material and returns it to its original position.

Function> The function will be explained based on the explanatory diagrams of the blank holding process in Fig. 1.2 and Figs. 3 to 9.

As the slide 3 begins to descend from the top dead center position due to the rotation of the crankshaft 1, the upper plunger 36 also descends due to the operation of the cam device 51 (Fig. 3). When the slide 3 reaches the bottom dead center position, the punch 4. The processed material 58 is punched out by the die 8 to form a blank material 59 (Fig. 4).
At this point, the blank material 59 is held between the lower plunger 36 that is descending and the lower plunger 48 that is waiting, and at the same time, the lower plunger 48 is also lowered synchronously by the cam device 5°6. Start.

As a result, the blank material 59 does not fall by itself due to the punching process, but is held between the two plungers 36 and 48, and descends in a stable state with a correct posture (FIG. 4.5).

Thereafter, when the held blank 59 reaches the gripping position between the fingers 12.12 of the transfer feed device, as shown in FIG. 6, both plungers 36.48 are stopped by actuation of the cam device 51.56. Next, the upper plunger 36 begins to rise by the cam device 51, and the lower plunger 48 further descends slightly, releasing the blank material 59 (FIG. 7). When the upper plunger 36 returns to its original position, it is stopped. During this time, the feed bar 10.10 is moved by the transfer feeder, and the blank material 59 between the fingers 12.12 is transferred to the next process (Fig. 8). ).

During this time, the slide 3 continues to rise and reaches the top dead center, and at the same time, the next workpiece 58 is sent onto the die 8 by the guide 57, and the lower plunger 48 begins to rise to the waiting position (Fig. 9). , the process is repeated again.

<Example> The following description will be made based on the illustrated embodiment.

Reference numeral 1 designates a crankshaft of a slide drive crank mechanism provided on an upper frame 2a that is the upper part of a machine frame 2 of a transfer press, and is rotated by a drive device (not shown). A slide 3 connected to the crankshaft 1 by a connecting rod (not shown) is positioned at the top of the machine frame 2 and can be raised and lowered, and an appropriate number of punches 4 are arranged at predetermined intervals in the longitudinal direction of the slide 3. It is arranged as follows.

Reference numeral 5 denotes a lower frame which is the lower part of the machine frame 2 in the transfer press, and a bolster 6 is held therein, and a die holder 7 attached to the bolster 6 has an appropriate number of dies 8 corresponding to the punches 4 similarly disposed therein. It is. (Two sets of these are shown in the illustrated example). A pair of feed bars 10.10 of the transfer feeding device are slidably provided in a space 9 extending in the longitudinal direction formed between the lower frame 5 and the die holder 7. The base end is configured to perform transfer motion by reciprocating in a predetermined longitudinal direction by a drive mechanism (not shown) housed in a bearing box 11 attached to the side of the lower frame 5. A suitable number of fingers 12 for gripping are arranged at the same pitch as the punch 4, etc., and are mounted facing each other.

Further, a vertical shaft 13 is connected to a bearing box 11 on the tip side of the crankshaft 1.
The vertical shaft 13 has a gear 15.15 such as a maglev bevel gear on its upper end side.
, and rotated by the crankshaft 1. And on the side of the vertical axis 13, a lower frame 5
An intermediate shaft 19 supported by a bearing 18 on a holding plate 17 of an upright support leg 16 is erected in parallel, and a belt is installed between pulleys 20 and 21 respectively attached to the vertical shaft 13 and the intermediate shaft 19. Reference numeral 22 indicates a winding connection via guide pulleys 23, 23.

Further, an upper camshaft 24 is provided on the front surface of the slide 3 parallel to the axis of the crankshaft 1.
is pivotally supported at one end by a bearing 25 attached to the slide 3, and at the other end is housed in a gear box 26 attached to the slide 3 (A in FIG. 1). It is pivotally supported by bearings 28, 28 of the section).

This transmission device 27 is configured to connect the crankshaft 1 and the upper camshaft 24 so that the upper camshaft 24 can be moved in parallel in the vertical direction with respect to the crankshaft 1 so as to transmit rotational force. That is, the upper opening 26a of the gear box 26
The lower side of the intermediate shaft 19 is loosely inserted into the gear box 26, and a bearing body 29 constituting the transmission device 27 is attached to the loosely inserted portion into the gear box 26. This bearing body 29 is slidable in the axial direction of the intermediate shaft 19, and is engaged with an appropriate number of protrusions (not shown) provided on the intermediate shaft 19 in the axial direction, so that the bearing body 29 moves with the intermediate shaft 19. It is said to be rotatable (for example, using a linear bearing system). A bevel gear 30 is fitted and fixed on the outer periphery of the bearing body 29, and the bevel gear 3o is rotatably attached to the gear box 26 via a bearing 31. Furthermore, the bevel gear 30 is meshed with a bevel gear 32 fixed to the tip of the upper camshaft 24, so that even if the upper camshaft 24 and gear box 26 move up and down as the slide 3 moves up and down, the upper camshaft 24 moves up and down parallel to the crankshaft 1, so the bearing body 29 moves up and down parallel to the axial direction of the intermediate shaft 19, and the bearing body 29 can transmit rotational force from the intermediate shaft 19. The upper camshaft 24 is raised and lowered in a maintained state, so that the upper camshaft 24 can be rotated by the crankshaft 1 even while it is being raised and lowered.

33 is a support shaft parallel to the axis of the upper camshaft 24;
It is supported by a bearing 34 provided on the slide 3, and an appropriate number of vibrating arms 35 are disposed on the support shaft 33 at the top of the machine frame 2.
! ! It is possible to install lJ. As shown in FIG. 3, the tip side of each vibrating arm 35
The upper plungers 36 are rotatably connected to the upper portions of an appropriate number of upper plungers 36 which are loosely inserted through the punch 4 having an inner hole 4a communicating with the punch 4. The vibration of the vibrating arm 35 causes the upper plunger 36 to move between the slide 3 and the punch 4.
It is raised and lowered through the shaft, and operates to hold and lower the punched blank material in cooperation with a lower plunger 48, which will be described later.

Further, on the lower side of the vertical shaft 13, an intermediate shaft 38, which is pivotally supported by a gear box 37 attached to the leg of the lower frame 5, is erected parallel to the axis of the vertical shaft 13. Pulleys 39 and 40 are attached to the pulleys 13 and intermediate shaft 38, respectively, and a belt 41 is wound around these pulleys 39 and 40 via a guide pulley 42. and lower frame 5
A lower camshaft 43 is provided on the front surface of the crankshaft 1 parallel to the axis of the crankshaft 1, and the lower camshaft 43 is rotatably supported by bearings 44, 44 provided on the lower frame 5, and one end is connected to the gear box 37. The lower camshaft 43 is connected to the intermediate shaft 38 by a pair of bevel gears (not shown), so that the lower camshaft 43 is rotated by the crankshaft 1.

45 is parallel to the axis of the lower camshaft 43, and bearings 46,
46 is a support shaft supported by the lower frame 5, and an appropriate number of vibration arms 47 are attached to the support shaft 45 so as to be movable gradually at the same pitch as the die 8 with an appropriate number of vibration arms 47 disposed at the bottom of the machine frame 2. It is being The tip side of each of these gradual movement arms 47 is rotatable with the lower end of an appropriate number of lower plungers 48 loosely inserted through each die 8 arranged in the die holder 7 on the side of the bolster 6 and the through hole 5a of the lower frame 5. is connected to. This lower plunger 48 is connected to the upper plunger 36.
The lower frame 5 and the die 8 can be moved up and down by the vibration of the swing arm 47.

Further, a suitable number of disc-shaped cams 49 are fixed to the upper camshaft 24 at the same pitch as the punch 4, and each cam 49 has a roller 50 (not shown) attached to the base end of each vibrating arm 35. The elastic member maintains the contact state at all times and engages the
are combined to form a cam device 51.

Similarly, the lower camshaft 43 has an appropriate number of disc-shaped cams 52.
is engaged with a roller 53 on the base end side of each gradual movement arm 47, and the roller 53 and cam 52 are arranged between the end of the rotation arm 47 and a spring seat 54 provided on the lower frame 5. A cam device 56 is configured by being constantly maintained in a contact state by a compression spring 55 provided. These cams 49,52 are rotated by the upper camshaft 24 and the lower camshaft 43, which are rotated by the crankshaft 1, and vibrate the vibrating arms 35,47 about the support shafts 33,45, respectively. 48 is raised and lowered. The cam device 51.56 consisting of these cams 49.52 is
The upper plunger 36 and the lower plunger 48 are operated against the blank material as follows. That is, when the slide 3, which is raised and lowered by the crankshaft 1, passes the bottom dead center, both plungers 36 and 48 are operated together, and the blank material punched out when the slide 3 passes the bottom dead center is held between its upper and lower surfaces. 36.48, and in this state both plungers 36.48 are lowered synchronously to move the held blank material between fingers 12.12.
After the blank is gripped by the fingers 12.12, the two plungers 36 and 48 are opened to release the blank. .48 is configured to return to its original position. Further, in FIGS. 3 to 9, reference numeral 57 indicates a guide for a material to be processed 58 such as a coil material, which is provided as a raw material, if necessary, and reference numeral 59 indicates a blank material punched from the material to be processed 58.

Next, the operation of the apparatus of the present invention having the above structure will be explained based on the explanatory diagrams of the holding process of the blank material 59 shown in FIG. 1.2 and FIGS. 3 to 9.

First, after the material 58 to be processed is fed onto the die 8, when the crankshaft 1 is driven by a drive device (not shown), the slide 3 starts to descend from the top dead center position in FIG. At the same time, the vertical shaft 13 rotates via the gear 15° 15, the intermediate shaft 19 rotates via the pulley 20, belt 22, and pulley 21, and the upper camshaft 24, which is descending together with the slide 3 via the transmission 27, rotates. The vibration arm 35 vibrates due to the operation of the cam device 51, and the upper plunger 36 starts to descend. Similarly, the intermediate shaft 38 rotates via the pulley 39, belt 41, and pulley 40, and this rotation causes the gear box 3
The signal is transmitted to the lower cam @ 43 via the cam, and the cam device 56 is activated. At this point, the roller 53 for each cam 52 is in contact with the base circle, so the drawing arm 47 is not activated. Therefore, the lower plunger 48
has stopped.

When slide 3 passes the bottom dead center, as shown in Fig. 4,
The workpiece 58 is punched by the punch 4 and the die 8 to form a blank 59. At this point, the blank 59 is inserted between the lower end of the upper plunger 36, which continues to descend, and the upper end of the lower plunger 48, which is waiting. is held in place.

At the same time, the cam 52 of the cam device 56 starts pushing up the roller 53, vibrates the swinging arm 47, and lowers the lower plunger 48 in response to the lowering of the upper plunger 36.
As a result, the blank material 59 is held between the two and descends through the die 8 in a stable state.

The slide 3 that has passed the bottom dead center begins to rise as shown in FIG. 5, but the upper plunger 36 and the lower plunger 48, which are operated by a lifting mechanism independent of the slide 3, are moved by their respective cam devices 51. By the operation of 56,
It continues to descend while holding the blank material 59, and during this time the feed bars to, to in the transfer feeder are
Due to this movement, the fingers 12.12 are positioned directly below the die 8.

In this state, both plungers 36 and 48 further descend to the sixth position.
As shown in the figure, the blank material 59 is attached to the fingers 12.12.
Once the gripping position between the two, for example the protruding receiver on the lower side of the finger 12.12 in the figure, is reached in a stable manner,
Both plungers 36 and 48 are stopped by the operation of cam devices 51 and 56. Thereafter, as shown in FIG. 7, the upper plunger 36 starts to rise by the cam device 51, but the lower plunger 48 descends slightly and then stops. continue. As a result, the blank 59 is released and the fingers 12.1
It remains held in the correct state between the two.

The rising upper plunger 36 then reaches a predetermined position and is stopped, during which time the transfer feed device is actuated to move the feed bar 10.10 and move the fingers 12.
The blank material 59 held between the blanks 59 is transferred to the next process. During this period, the slide 3 continues to rise due to the rotation of the crankshaft 1 (FIG. 8).

While the slide 3 is rising toward the top dead center, the material to be processed 58 is again fed onto the die 8 (FIG. 9).

Thereafter, the lower plunger 48 is raised by the cam device 56 and stopped at the standby position shown in FIG. 3, and thereafter, the above operation is repeated to continue the transfer processing.

10 to 12 are views showing other embodiments in which the upper camshaft transmission device of the present invention is different, in which the lower side of the crankshaft 1 provided on the upper frame 2 is supported by the lower frame (not shown). A leg 60 is provided upright, and an intermediate shaft 62 is supported by a bearing 61 provided on the support leg 60 so as to be parallel to the axis of the crankshaft 1 . The crankshaft 1 and the intermediate shaft 62 are connected to each other by pulleys 63 and 64 attached to each pulley and a belt 65 wound between them so that rotation can be transmitted.

Further, a bearing 66 corresponding to the bearing 61 is fixed to the slide 3, and an upper cam shaft 67 parallel to the axis of the crankshaft 1 is supported on the bearing 66. The shafts 67 are connected by a six-link power spring type transmission device 68 (trade name: Schmidt Coupling) as shown in FIGS. 11 and 12.

This transmission device 68 has an input shaft disc 70 and an output shaft disc 71 connected to each other by three links 72 via an intermediate disc 69, and the input shaft disc 70 is connected to the intermediate shaft 62. , the output shaft disk 71 is connected to the upper camshaft 67.

As a result, the crankshaft 1 and the upper camshaft 67 that is parallel to the crankshaft 1 are connected, and even if the upper camshaft 67 moves parallel to the crankshaft 1 due to the elevation and descent of the slide 3, the crankshaft of each link 72 As a result, rotational force is constantly transmitted from the crankshaft 1 to the upper camshaft 6f.

73 is a support shaft parallel to the axis of the upper camshaft 67;
The support shaft 73 includes a bearing 66 and a bearing 74 provided on the slide 3.
, and an appropriate number of vibrating arms 7 are installed in the middle part of the vibrating arms 7.
5 is placed on the top of the machine frame 2, the slide 3
It is fixed at the same pitch as a punch (not shown) provided in the figure.

The tip side of each vibrating arm 75 is rotatably connected to the upper part of the upper plunger 36, which is the same as in the previous embodiment.

Further, a disc-shaped cam 76 is fixed to the upper cam shaft 67, and the cam 76 is always kept in position by the action of a roller 78 of an arm 77 fixed to the tip of the support shaft 73 and a coil spring 79. The cam device 80 is engaged in a contact state and constitutes a cam device 80.

This cam device 80 is connected to the transmission device 68 by the crankshaft 1.
The upper camshaft 67 rotates through the upper camshaft 67 to rotate the support shaft 73 forward and backward to vibrate each vibrating arm 75.
Each upper plunger 36 is operated at the same timing as in the previous embodiment.

FIG. 13 shows still another embodiment of the present invention. In this embodiment, the vibrating arm for raising and lowering the upper plunger 36 is attached to a fixed machine frame 2 instead of the movable slide 3.
It should be installed on the top of the machine. That is, the crankshaft 1 which is pivotally supported by the upper frame 2a of the machine frame 2 is supported by the upper camshaft 81 which is pivotally supported by the bearing 14 of the bearing box 11 and is installed upright.
and are connected to each other by gears 15 and 15 similar to the embodiment described above so as to be able to transmit rotation.

A vibrating arm 82 is disposed on a fixed wall that is the upper side of the machine frame 2, and the vibrating arm 82 is vibrated freely on a support shaft 84 supported by a bearing 83 attached to the fixed wall. The tip end thereof is rotatably connected to the upper part of the upper plunger 36 loosely inserted into the slide 3, as described above.

A cylindrical cam 85 is fixed to the upper camshaft 81 in correspondence with the vibrating arm 82. A groove 86 of a predetermined shape is formed on the outer circumference of the cam 85.
In the above configuration in which the roller 87 attached to the base end is engaged and constitutes the cam device 88, the cam 85 is rotated by the upper camshaft 81 which is rotated by the crankshaft 1 via the gear 15.15. As a result, the roller 87 is inserted into the groove 86.
The vibration arm 82 that engages the vibration arm 82 vibrates around the support shaft 84, and the upper plunger 3 connected to the tip side of the vibration arm 82 vibrates around the support shaft 84.
6 raises and lowers the slide 3 at the same timing as in the previous embodiment.

<Effects of the Invention> As is clear from the above explanation, according to the present invention, the blank material is held between the upper plunger and the lower plunger immediately after being punched, and the blank material is kept in a stable state by lowering both plungers. The blank material is moved down through the die while maintaining the blank material, and is accurately transferred and transferred to the gripping position between the opposing fingers of the transfer feeder, so that the blank material is reliably gripped at the correct position between the fingers. This makes it possible to operate the press at high speed, which helps improve productivity.Also, since the upper and lower plungers can be operated at timing independent of the raising and lowering of the slide, the operation can be adjusted freely. This makes it possible to easily meet various demands.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view, Fig. 2 is an enlarged sectional view of the transmission device indicated by the symbol A in Fig. 1, and Figs. 3 to 9 are blank materials. Fig. 10 is a partially cutaway perspective view showing another embodiment of the present invention, Fig. 11 is a front view of the transmission device, Fig. 12 is a side view thereof, and Fig. 13 is a diagram showing the present invention. 1 is a partially cutaway front view of essential parts showing still another pilot test. 1... Crankshaft, 2... Machine frame, 2a... Upper frame, 3... Slide, 4...・Punch, 6... Bolster, 8... Die, 10... Feed bar, 12... Finger, 24.67.81... Upper camshaft, 35.47, 75.82... Vibration arm, 36...
Upper plunger, 43... Lower camshaft, 48... Lower plunger, 49.52, 78.85... Cam, 51.56, 80.88... Cam device, 59... Blank material. Patent application Yamada Dobby Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 116 Figure 7 Figure 1jE8 Figure 9

Claims (1)

[Claims] In a transfer press that is equipped with a slide drive system using a crank mechanism and that sequentially transfers blanks to the next process using a feed bar equipped with fingers that grip and release blanks, the upper part is rotatable by a crankshaft installed in the upper frame. A vibrating arm is disposed at the top of the machine frame so as to vibrate via a cam device of the camshaft, and the vibrating arm is connected to an upper plunger loosely inserted into a punch disposed on the slide side. A swinging arm is arranged at the bottom of the machine frame so that it can vibrate via a cam device of a rotatable lower camshaft, and the swinging arm is loosely inserted into a die arranged on the bolster side, facing the upper plunger. After the slide passes the bottom dead center due to the rotation of the crankshaft, the two cam devices hold the blank between the upper and lower plungers and lower the blank to the position where the fingers grip the blank. A blank material holding device for a transfer press, characterized in that a cam is provided for releasing the blank material at the blank material gripping position and returning the blank material to its original position.