JPH0331526B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a deep drawing press, and more specifically, it is a press for deep drawing, and more specifically, a press for deep drawing, which processes a material from blank punching to multi-stage drawing, edge cutting, and shaping with one stroke or one stamp. The present invention relates to a deep-drawing press having a novel structure capable of obtaining a deep-drawn product by completing the following working steps.

[Conventional technology]

Conventionally, in the press manufacturing of deep-bottomed containers such as air cleaners, oil bottles, cans, etc., due to limitations such as material thickness, elongation rate, press workability, drawing rate, etc. The molding process must be divided into drawing steps. An example of carrying out this deep drawing process is a multi-machine machine in which each work process, such as punching a material blank, primary, secondary, tertiary drawing, edge cutting, shaping, etc., is divided into multiple press machines. A division of labor system is adopted, but this requires a large number of press machines, similar workers, and a large installation area and work space, which not only increases equipment and labor costs, but also There is a large cumulative error due to the precision of each machine, the production of molds used for each machine, the precision of installation, errors, etc. Each time the product was processed, there were problems such as heat generation due to multiple processing and work hardening and quality deterioration caused by natural cooling in the atmosphere after extrusion from the mold.

In order to solve this problem, a method has been proposed or adopted that uses one double-acting press and a progressive mold or a compound mold arranged coaxially to complete multiple press operations in one stamp. ing.

[Problem that the invention seeks to solve]

However, such press machines are limited by the structure and operation of the conventional machine itself, and are usually capable of only blank punching, primary drawing, and secondary drawing, or temporary to tertiary drawing of a pre-punched blank. However, it was not suitable for deep drawing work, which involves multiple forming processes including edge cutting and shaping. Therefore, after the drawing process, it was necessary to perform edge cutting and shaping using a separate press. In addition, when using a progressive mold, the mold is bulky and a press with large capacity must be used, which consumes a lot of energy. It is extremely difficult to feed the material progressively in the same direction, and therefore it is suitable for stamping a core plate with no unevenness or a stamping of an eyelet without significant unevenness, but is not suitable for deep drawing. In the case of using a coaxial decoupling drawing die, the total number of processes can be reduced by combining several processes into one process, the die is not too bulky, and the work efficiency is very high, but as is well known, the conventional The composite drawing die is equipped with a set of springs that support each lower punch or die and actuate the punches or dies upward after they have been subjected to the downward impact pressure of the ram and are acted upon by an upward elastic force. Therefore, the operating power of the press must be sufficient to overcome the load that can plastically deform the material as well as the resistance of the elastic force of the spring set, which necessitates the use of a large press. In addition, the mold had to be heavy enough to withstand the pressure of the press, which caused the problem of increased equipment and mold costs.

In addition, in the conventional double-acting press, the stroke of the ram is limited to the stroke and structure of the wrinkle suppressor driven by a cam, and it is not possible to perform very deep drawing. For example, if the stroke of a conventional double-acting press using a compound type is 200mm,
The resulting product is approximately the total stroke length.
Only 40% of the depth (approximately 80mm) of drawing is obtained, and the remaining 60% of the stroke is wasted. Therefore, it is extremely difficult to obtain a deep-drawn product with a depth of more than half the ram stroke by continuous one-stamp drawing using a conventional double-acting press.

[Means for solving problems]

Therefore, the present invention provides a drive unit 2 at the top of the frame 1.
It is a double-acting press having a crankshaft and a transmission mechanism 3, which is arranged on the side wall of the frame 1 and is composed of a brake clutch and a gear train driven by the drive machine 2, and a horizontally an upper crank cam device 4 supported by the frame 1 and transmitted by the transmission mechanism 3; A lower crank cam device 5 rotates at a lower rotational speed than the upper crank cam device 4, and a ram 6 attached to the frame via a connector 43 to the crankshaft of the upper crank cam device 4 so as to be slidable up and down. , a set of slide plates 74a to 74d, which are driven by the crank cam device through a plurality of lifting rods 76a to 76d above the lower crank cam device 5 and move up and down in stages with time differences; A deep drawing press is provided which is arranged above the set and comprises a ram 6 and a fixed bed 8 mounted on a frame so as to face each other with a working space in between.

[Effect]

According to the present invention, a pair of upper and lower crank cam devices 4 and 5 are driven in relation to each other at different rotational speeds.
A deep drawing press comprising: a ram 6 that moves up and down driven by the crank cam devices 4 and 5; and a slider set 7 that moves up and down stepwise at a time difference during the one-stroke cycle of the ram 6. With this configuration, the strip material fed into the coaxial composite mold attached to this press can be blank punched in one stroke (one stamp), primary or multiple drawing forming, edge cutting, shaping, extrusion of finished products and remaining materials, etc. Through a series of processes, it is possible to obtain a drawn product, and it is also possible to easily and efficiently obtain a product such as a container with a deep bottom, where the drawing depth is almost the same as the total length of the stroke. It requires less power than conventional press machines using compound type or progressive type, and
The process from raw material to finished product is completed with one stamp using the same press and the same mold, so there is no loss of time and space such as transporting semi-finished products and waiting for the process, and there is no need for multiple exposures to the cold air in the room during processing. Because there is no cooling of the temperature of the semi-finished product due to contact with the semi-finished product, and the finished product is completed under the same processing conditions as coaxial, it is possible to efficiently form deep-drawn products with high precision and extremely good quality. can.

〔Example〕

The present invention will be described below based on embodiments shown in the accompanying drawings.

As shown in FIGS. 1 and 2, the deep drawing press of the present invention mainly includes a straight-walled frame 1 whose side surfaces are approximately C-shaped, a driver 2 attached to the upper end of the frame 1, and a drive machine 2 attached to the upper end of the frame 1. The transmission mechanism 3 provided on an arbitrary side wall, the upper crank cam device 4 provided at the front upper part of the frame 1, and the lower crank cam device 5 provided at the front lower part of the frame 1, Crank cam device 4
The slider set 7 is provided on the upper part of the lower crank/cam device 5 so as to be interlocked with the ram 6 provided on the lower part of the slider set 7, and the slider set 7 is arranged in a multi-stage manner, and the fixed bed 8 is provided above the slider set 7. Ru.

The frame 1 forms a work space approximately in the center of the front, and is a structure made of steel plate or other material with a gate-shaped front and a C-shaped side. , this driving machine 2 uses a continuously variable speed motor in this embodiment,
The present invention is not limited to this type of motor, and other types of drive machines can also be used. Further, the driving machine 2 is located outside the upper surface of the frame 1, and is located on the frame 1 suitable for driving.
It is well known to those skilled in the art that it may be installed at any location within the frame 1 or at a location remote from the frame 1.

The transmission mechanism 3 is provided on the side wall of the frame 1 and is a device that transmits the rotational force of the drive machine 2 to the upper and lower crank cam devices 4 and 5, and is a device that transmits the rotational force of the drive machine 2 to the upper and lower crank cam devices 4 and 5.
1, an upper driven pulley 33 which also serves as an upper flywheel and which is transmitted to the pulley 31 via a belt 32, a lower driven pulley 35 which also serves as a lower flywheel and which is driven by the driven pulley 33 via a belt 34; An upper brake clutch 36a provided between the upper pulley 33 and its transmission shaft 30a, a lower brake clutch 36b provided between the lower pulley 35 and its transmission shaft 30b, and an upper reduction gear device 37 driven by the upper pulley 33. , and a lower reduction gear device 38 driven by a lower pulley 35.

The upper reduction gear device 37 includes a main drive gear 37a attached to a transmission shaft 30a, and a driven gear 37 attached to an intermediate shaft 39a whose both ends are supported by both side walls of the frame 1 and meshes with the main drive gear 37a for transmission.
b, and the gear 37 attached to this intermediate shaft 39a.
c and the crankshaft 4 of the upper crank cam device 4
The lower reduction gear device 5 consists of a final gear 37d attached to one end of the gear 37c and transmitted by meshing with the gear 37c.
8a, a gear 38b attached to an intermediate shaft 39b whose both ends are supported by both side walls of the frame 1 and meshing with the gear 38a for transmission; a gear 38c attached to the same intermediate shaft 39b; A gear 38d is attached to another intermediate shaft 39c supported by both side walls and meshes with the gear 38c to transmit power;
It consists of a gear 38e attached to the intermediate shaft 39c, and a final gear 38f provided at one end of the crankshaft 51 of the lower crank/cam device 5 and meshing with the gear 38e for transmission.

In this configuration, when the drive machine 2 rotates clockwise as shown in FIG. 2, the upper crank cam device 4 is driven to reduce speed by the upper reduction gear device 37 of the transmission mechanism 3 and rotates in the same direction as the drive machine 2. At the same time, the lower crank cam 5 is connected to the lower reduction gear device 3.
8 and rotates in the opposite direction to the drive machine 2.

In this embodiment, the upper reduction gear device 37 is placed on the upper left side of the frame 1 shown in FIG. 1, and the lower reduction gear device 38 is placed on the lower right side of the frame 1. The positions on the same side of the frame 1 or on both left and right sides may be changed. Further, the speed ratio between the upper crank cam device 4 and the lower crank cam device 5 is selected to be higher than the latter depending on the design, but normally the speed ratio between the two is, for example, 2:1 to 2:1. 10:1
It is preferable to select within the range of . Further, the rotation directions of both devices 4 and 5 may be the same.
Furthermore, the transmission mechanism 3 can also adopt a chain sprocket device or other suitable transmission device, instead of a belt pulley.

The upper crank cam device 4 is shown in FIGS. 2 and 3.
As shown in the figure, it is driven by an upper reduction gear device 37, and one end is connected to the final gear 3.
7d, a block-shaped connector 43 which is rotatably attached to the crank pin 42 of the crankshaft 41 and extends downward perpendicular to the crankshaft 41, and this connector 43 whose length is adjustable. A bolt 44 screwed onto the tip of the
It is composed of a pair of heart-shaped cams 45, 45 that are symmetrically attached to the crankshaft 41 at intervals on both sides of the crank portion that supports the crank pin 42.

The lower crank cam device 5 is provided below the upper crank cam device 4 so as to face it, and is driven by the lower reduction gear device 38, and is shown in FIGS. 1 and 4. As shown, a crankshaft 51 with a final gear 38f attached to one end, a block-shaped connector 53 rotatably attached to a crank pin 52 of the crankshaft 51 and extending upward perpendicular to the axis, and this connector. Connecting rod 54a attached to the tip of 53
and this rod 5 via the ball joint 50.
a central lifting rod 54b connected to the tip of 4a;
A plurality of pairs of cams 55 are attached to the crankshaft 51 in a step-like manner so that the left and right pairs are symmetrical about the crank pin 52 and support the crank pin 52;
Consists of 55, 56, 56, 57, and 57.
In this embodiment, this cam set includes small-sized cams 55, 55 provided at both ends of the crankshaft 51, and a crankshaft 55, which is in contact with the inside of the small cams 55, 55.
It consists of three pairs of cams: medium-sized cams 56, 56 provided in 1, and large-sized cams 57, 57 provided with both sides touching the inside of the cams 56, 56 and the outside of the connector 53. However, the number of cam sets can be adjusted depending on the number of deep drawing processes, the composite mold, the workability and thickness of the material, etc.
Further, projections 58, 58 that perform a fourth cam function are provided inside the top ends of the longest diameter portions of the large cams 57, 57, and the function thereof will be described later.

As shown in FIG. 1, the ram 6 is installed below the upper crank cam device 4 in a vertically slidable manner with its both sides guided by a pair of guide portions 11 provided at the top of the frame 1, and its upper end is guided by a pair of guide portions 11 provided at the top of the frame 1. The joint member 61 provided at the location and the ball 4 at the lower end of the connecting bolt 44
4a, and is integrally connected to the connector 43 by a ball joint. Springs 62 are provided on both sides of the ball joint in the recess so as to constantly bias the sliding plate 64 at its lower end downward. Pressing plate 9 via connecting rod 65 that penetrates
4a is connected to a sliding plate 64. In addition, Ram 6
A pair of left and right ram presser bars 63 are screwed onto the upper surface of the bolt 44, and a roller 63a that intermittently cooperates with the cam 45 is attached to the upper end of the presser bar 63.
is provided.

The slider set 7 is provided above the lower crank/cam device 5 at the front lower part of the frame 1.
A top plate 7 whose both ends are fixed to both inner walls of the frame 1
1, and a lower plate 7 fixed to both inner walls of the frame 1 at a predetermined interval below the upper plate 71.
2, both side plates 73, 73 fixed upright in parallel with each other on both sides of the upper and lower plates 71, 72, and multiple stages (in this embodiment, there are 4 stages), and both ends are the both side plates 7
Slide plates 74a to 74d are provided to be vertically slidable along the inner surfaces of the parts 3 and 73, and the upper ends of the slide plates 74a to 74d are in contact with the lower surfaces of the slide plates 74a to 74d, respectively, and the lower ends of the lower crank and cam devices 5 are respectively attached to the slide plates 74a to 74d. A plurality of pairs (four pairs in this embodiment) of lifting rods 76a to 76a are provided with rollers 75 that cooperate with pairs of cams 55 to 57.
76d. Note that the lower end of the rod 76d is in contact with the surface on the rotation locus of the cam protrusion 58 inside the cam surface of the cam 57, and when the cam 57 rotates,
The lower end of the rod 76d rides on the protrusion 58.

A fixed bed 8 is provided on the upper surface of the upper plate 71 so as to face the upper ram 6, that is, the movable bed. As shown, they are mounted on the ram 6 and the bed 8, respectively.

The upper end of the central lifting rod 54b is the upper and lower plate 7.
1, 72, each of the slide plates 74a to 74d and the bed 8 are slidably penetrated, and then protruded above the bed 8, and the elevating rod 76a is also slidably moved between the lower surface plate 72 and the slide plate 74b. ~74d
The rod 76b also passes through the lower surface plate 72 and the slide plates 74c to 74d, and its upper end touches the lower surface of the first stage slide plate 74a. The rod 76c penetrates the lower plate 72 and its upper end abuts the lower surface of the fourth slide plate 74d, and the rod 76d passes through the lower plate 72 and the slide plate 74d and its upper end is the third stage slide plate 74
It is in contact with c. (See FIG. 1) One embodiment of the mold 9 used in this press is composed of an upper mold 9A and a lower mold 9B, as shown in FIGS. 5A and 5B. The upper mold 9A has a plurality of dies coaxially arranged in stages such that the cavity diameter becomes gradually smaller and the depth becomes deeper from the bottom to the top depending on the number of forming steps required for the deep-drawn product. 9
Includes 1, 92, 93, 94, and the top die 9
Inside the cavity of No. 4, there is further a pressing plate 94a provided on the upper surface of the die 94, and a pressing rod 94b which is connected to the lower surface of the pressing plate 94a and whose lower end passes through the die 94 and can move up and down. An annular edge cutting die 95 is provided. Further, the lower mold 9B includes a cylindrical outer mold 96 and this outer mold 96.
An annular punching die 96a that is fitted onto the outer circumferential surface of the upper end, whose upper end slightly protrudes above the outer die 96, and whose inner circumferential upper edge serves as a blank punching cutting edge, and each of the dies 91 to 94 of the upper die 9A. A plurality of punches 97a to 97d are coaxially arranged in multiple layers so as to correspond to the inner diameters of the rods, respectively, and a finishing punch 98 is attached to the upper end of the center rod 54b.
The upper ends of a plurality of push-up rods 99a-99d each having one end extending downward are connected to the lower ends of a-97d, and these push-up rods 99a-99d
The lower ends of the rods 99c and 99d are arranged to exchange positions with the slide plates 74c and 74d, respectively, which are in contact with the upper surfaces of the slide plates 74a to 74d. That is, Rod9
The lower end of 9c is attached to the slide plate 74d, and the rod 99d
The lower end of is in contact with the slide plate 74c.

Next, the operating state of the press of the present invention configured as described above during use will be explained.

First, when the drive machine 2 rotates, the upper and lower pulleys 33 and 35 are connected to the drive pulley 31 and the belts 32 and 34.
The rotational motion is synchronous and in the same direction due to the power transmission (see Figure 2). The upper crank cam device 4 is connected to the pulley 3 by the reduction transmission of the upper reduction gear device 37.
The lower crank cam device 5 rotates in the same direction and at a low speed as the pulley 35 due to the reduction transmission of the lower reduction gear device 38. Since the rotational speed ratio of the upper crank cam device 4 and the lower crank cam device 5 is set to 4:1 in this embodiment, the upper crank cam device 4 rotates one revolution.
When rotated through 360 degrees, the lower crank cam device 5 can rotate only 1/4 turn, or 90 degrees. In reality, it goes without saying that this speed ratio can be selected to any suitable value depending on the workpiece and processing conditions. The operational relationship between the above two devices will be described in detail later.

Next, the operating conditions of the press of the present invention are shown in FIGS. 5 to 7.
This will be explained based on the diagram. In other words, when the upper crank cam device 4 rotates 180 degrees from the top dead center a and reaches the bottom dead center b, the upper die 9A attached below the ram 6 is linked to the connector 43 and the bolts 44, 44, and the ram 6 along the guide part 11 and punch out the material W placed on the upper surface of the lower die 9B, as shown in FIG. 5A.
This results in a state like this. When the ram 6 descends to the bottom dead center b, the long diameter ends of the pair of cams 45 of the crankshaft 41 just press downward the roller 63a at the upper end of the presser bar 63 of the ram 6, and press the ram 6. Pneumatic brake clutch 3 on pulley 33
6a disconnects the coupling action of the clutch by blocking the air passage of a solenoid valve switch (not shown), and the crank cam device 4 stops rotating at this position, ensuring that the ram 6 is moved into the lower mold. 9B and hold it at the bottom dead center position b.

At the same time that the upper crank cam device 4 rotates from the top dead center a to the bottom dead center b as described above, the lower crank cam device 5 rotates from the bottom dead center position c to the top dead center d as shown in FIG. It used to rotate,
In this embodiment, the speed ratio of the upper and lower crank cam devices 4 and 5 is set to 4:1, so the upper crank cam device 4 rotates 180 degrees to reach the bottom dead center b.
When the lower crank cam device 5 reaches the bottom dead center c
It will rotate by 45 degrees in the direction shown by the arrow. After that, the upper crank cam device 4
The rotation of the lower crank cam device 5 is stopped by the separating action of the clutch 36a, but the lower crank cam device 5
However, it continues to rotate because it still maintains its connected state. At this time, the cam surface of the first cam 55 passes through the rod 76a to the first slide plate 7.
Push up 4a. Then, the slide plate 74a pushes the first punch 97a upwardly through the push-up rod 99a into the cavity of the die 91, and performs the first drawing forming on the previously punched blank W. Let the stroke of 97a be _S1 . As the lower crank cam device 5 continues to rotate, the cam surface of the second cam 56 moves to the lifting rod 7 after the first forming of the first punch 97a.
6b, the second punch 97b is pushed into the cavity of the die 92 via the second stage slide plate 74b and the push-up rod 99b, and the material W that has undergone the first drawing is subjected to second drawing forming. The stroke of the punch 97b at this time is _S2 . Subsequently, the cam surfaces of the third cams 57, 57 simultaneously push both the fourth punch 97d and the third punch 97c overlapping the die 93 through the rod 76c, the fourth slide plate 74d, and the push-up rod 99d. The material W is pushed into the cavity and undergoes secondary forming.
Punch 9 at this time performs tertiary drawing forming.
Let the stroke of 7c be S ₃ . At this time, the crank pin 52 of the lower crankshaft 51 comes to an upper position close to the top dead center d, and the finishing punch 98 in the center is inserted into the uppermost die 94 by the connector 53 via the rods 54a and 54b. The material W is pushed in, and the material W is subjected to fourth drawing forming and finishing shaping.
The crank 5 rises to top dead center d and completes one stroke S, but at this stage of operation,
The protrusion 58 that is higher than the cam surface of the cam 57 is at the top dead center d
Push up the rod 76d in front of the third stage slide plate 74c and the rod 99d, push the third punch 97c against the spring 62 into the edge cutting die 95 in the die 94, and
At the same time, the finish punch 98 cuts the edges of the material W that has been drawn and formed using the cut edges of the die 95 and the die 94 , and at the same time, the finishing punch 98 cuts the edges of the drawn product W that has been edge-cut at the final stage of the stroke while continuing to rise. Push it inside, perform final finishing shaping, and finish drawing forming. (See Figure 5B). At this time, the lower crank cam device 5 reaches the top dead center d, and from there it makes the remaining half rotation toward the bottom dead center c.

When the lower crank cam device 5 rises to top dead center d, the crank cam device 4 is reconnected by the action of a solenoid valve (not shown) that is interlocked with the lower crank cam device 5. The ram 6 is rotated from the bottom dead center b toward the top dead center a by the clutch 36a, and the ram 6 rises together with the upper mold 9A via the connector 43 and the bolt 44, and returns to its original upper position, at the same time releasing the solenoid valve. Stops due to action and braking action. On the other hand, since the lower crank cam device 5 continues to rotate from the top dead center d toward the bottom dead center c, each of the slide plates 74a to 74d operates in the opposite manner to the above as the lifting rods 76a to 76d descend. The punches 97a to 97d also descend in stages via the rods 99a to 99d, and at the same time, the finishing punch 98 also descends as the connector 53 and push-up rods 54a and 54b descend.
Eventually, each of the punches 97a to 97d and 98 returns to the state housed inside the lower mold 9B, and the deep drawn product W in the uppermost die 94 has a spring 6.
With the return force of 2, the sliding plate 64, the connecting rod 65, and the pressing plate 9
4a to the extrusion plate 94c, completing the extrusion process of the molded product, and the fifth
At the same time as returning to the state shown in Figure A, the upper and lower crank cam devices 4 and 5 also return to the positions of top dead center a and bottom dead center c, respectively, as shown in Figure 6, completing one cycle of the one-stroke stamp. Thereafter, by repeating the same cycle, the material sent to the mold can be continuously formed into one drawn product with each stroke.

An example of the relationship between the rotational state, stroke, and machining process in one cycle of the upper and lower crank cam devices is shown in the chart of FIG.

In the above embodiment, an example was described in which multiple steps from blank punching to primary to quaternary drawing forming, edge cutting, shaping (finishing), and finished product extrusion are completed in one cycle and one stroke, but the press of the present invention It is not limited to this application. In fact, the present invention
The cam devices 4 and 5 can be used for various drawing forming operations without increasing or decreasing or changing them. For example, in the case of tertiary drawing molding, the outermost rod 76a may be removed to prevent the rotation of the first cam 55 from being transmitted to the first slide plate 74a. If secondary drawing is used, the rods 76a and 76b may be removed to prevent the first cam 55 and the second cam 56 from transmitting motion to the first and second slide plates 74a and 74b. Of course, in this case, the mold 9 must be a coaxially arranged composite die set capable of producing a predetermined molded product. In addition, in this embodiment, the cams 55 to 57 are formed in a symmetrical shape as shown in FIG. 6, but in reality, they may have an asymmetrical shape depending on the time of each molding process and the timing of previous and subsequent operations. You can also.

Another feature of the present invention is that if this press is used to perform general punching work such as a motor core plate or drawing work for simple molded products due to operational necessity, the press simply connects the lower clutch 36b. state is released to maintain the lower crank/cam device 5 in the stopped state, and at the same time, the upper clutch 36a is always maintained in the engaged state to continuously rotate only the upper crank/cam device 4, thereby moving the ram 6 up and down. If so, it can be used for general press work in the same way as conventional double-action presses, and the scope of use of the present invention can be expanded.

〔Effect of the invention〕

Since the present invention is configured as described above, it is easy to perform a series of deep drawing processes from blank punching to multiple drawing forming, edge cutting, and final shaping in one stroke or one stamp, which was extremely difficult with conventional presses. It can be carried out reliably, and the process is fast and easy since the blank is fed into the machine and the finished product is discharged from the mold in one continuous operation within a short period of time in the same mold. There is no loss of time waiting for semi-finished products and the influence of atmospheric cooling on semi-finished products, and it is also possible to suppress the occurrence of work hardening due to long processing times. Since there is no cumulative error in machining accuracy that occurs with conventional presses, production efficiency can be improved several times compared to conventional presses.As a result, the quality and precision of the molded products are very good, and the surfaces of the products are also extremely smooth and wrinkle-free. etc. do not occur. Further, according to the present invention, the multi-step molding process can be completed with one stamp, but in the operation of the machine, each of these next steps is performed in stages at different times, so the required power is the same. Compared to the power required to produce deep-drawn products using a conventional press, this method requires less horsepower, which saves energy, and allows the use of lighter and lighter molds, reducing material costs. can. Furthermore, in the present invention, the stroke of the crank mechanism can be fully utilized, and in the case of the above embodiment, approximately 90% of the stroke can be utilized, and the machining depth is more than twice that of conventional presses. In addition, the volume of the machine can be reduced, and a single press can form deep-drawn products through multiple drawing processes that could not be achieved with conventional presses. Simply punching and simple bending, as
It is an extremely useful invention that can be used for shallow drawing molding, etc.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view partially sectional, Fig. 2 is a side view, Fig. 3 is a perspective view showing the upper crank cam device, and Fig. 4 is a lower part. FIGS. 5A and 5B are perspective views showing a crank cam device, and sectional views showing an example of a mold used in the present invention, showing the states before and after the punch set is operated, respectively. FIG. 6 is an explanatory diagram showing the operating state of the upper and lower crank cam devices, and FIG. 7 is an operational analysis diagram showing the relationship between the stroke and time of the same device. 1...Frame, 2...Driver, 3...Transmission mechanism, 4...Upper crank/cam device, 5...Lower crank/cam device, 6...Ram, 7...Slider set, 8...Fixed Betsudo.

Claims (1)

[Claims] 1. A straight-walled frame 1 whose side surfaces are approximately C-shaped;
A drive machine 2 provided on the frame 1, a transmission mechanism 3 attached to the side wall of the frame 1 and driven by the drive machine 2 to transmit rotational force to the crank cam device, and a transmission mechanism 3 mounted horizontally on the top of the frame 1. An upper crank cam device 4 is supported on a shaft and is transmitted by a transmission mechanism 3; - A lower crank cam device 5 that transmits power at a lower rotational speed than the cam device 4, and a lower crank cam device 5 located below the upper crank cam device 4 and pivoted to the crankshaft of the device 4 via a connector 43, on both sides. A ram 6 is mounted horizontally so as to be movable up and down along guide means provided on both inner walls of the frame 1, and a plurality of lifting rods 76a to 76d are located above the lower crank/cam device 5.
is driven to the lower crank cam device 5 via
Slider set 7 having a plurality of slide plates 74a to 74d that move up and down in stages with time differences.
and a fixed head 8 disposed above the slider set 7 and mounted on a frame so as to face the ram 6 with a working space therebetween. 2. The transmission mechanism includes two sets of upper and lower reduction gear devices 37 and 38 having different rotational speeds, and these reduction gear devices 37 and 38 operate the upper crank cam device 4 and the lower crank cam device 5. The deep drawing press according to claim 1, wherein the deep drawing press is configured to rotate in the same direction or in different directions, and at a rotational speed of the former at a higher speed than that of the latter. 3 The upper crank cam device 4 is connected to the crankshaft 4
1, a connector 43 rotatably provided on the crank pin 42 of the crankshaft 41, and a pair of cams 45 provided symmetrically on both sides of the connector 43 at a predetermined distance on the axis of the crankshaft. A deep drawing press according to claim 1. 4 The lower crank cam device 5 is connected to the crankshaft 5
1, a connector 53 rotatably provided on the crank pin 52 of the crankshaft 51, and at least two pairs of connectors 53 arranged symmetrically,
A deep drawing press according to claim 1, comprising camsets 57, 56, and 55 provided on the crankshaft 51 in steps such that the size thereof gradually decreases from the inside to the outside in contact with both sides of the crankshaft. 5 Upper and lower two sets of reduction gear devices 37 of the transmission mechanism 3
and 38 are provided with brake clutches 36a and 36b for controlling the rotational movements of the upper and lower crank cam devices 4 and 5, respectively. Press for. 6. The slider set is arranged in a multi-stage manner between upper and lower plates 71 and 72, which are fixed at the lower part of the fixed bed 8 so as to face each other at intervals, and are movable upward and downward, and one end is connected to the lower crank. - It is pushed and moved up and down in stages by a plurality of elevating rods 76a to 76d, which abut the respective cams 55 to 57 of the cam device 5 and whose other ends abut the corresponding slide plates 74a to 74d. Slide plates 74a-7
4b. The deep drawing press according to claim 1, characterized in that the deep drawing press is comprised of 4b. 7. When the connector 43 of the upper crank cam device moves down to the bottom dead center position, the brake clutch 36a releases and brakes the crank cam device 4 to hold it in a stopped state, and the lower crank cam device 4 is held in a stopped state. When each of the cams 55 to 57 of the cam device 5 rises to the top dead center, the brake clutch 36a reconnects and releases the brake, causing the upper crank cam device 4 to rotate again and move upward to the top dead center. A deep drawing press according to claim 1, characterized in that it is configured as follows.