JPS6217132Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a turret punch press machine that performs processing such as drilling holes in sheet materials such as metal by single punching, cutting by continuous punching, notches, and window cutting. In particular, the mold provided on the turret can be rotated to any desired position.

[Conventional technology]

In the case of press working performed on a workpiece, there are many cases in which the shape is the same molded shape, but the process is required to be performed in various directions and positions relative to the workpiece. In such a case, if the structure is such that the mounting angle of the upper and lower molds can be changed in the required direction, it is possible to perform punching at different angles using one mold. A huge force of 20 to 50% of the pressurizing force is applied to the mold, so the upper and lower molds must be firmly fixed to the slider or bed with bolts or claw metal fittings to prevent them from shifting. As such a technique, there is a device having a structure as shown in FIG. 1, which is disclosed in Japanese Patent Publication No. 19839/1983.

Next, this device will be explained.

In FIG. 1, 1 is a bed, 2 is a rotary disk rotatably provided on the bed 1, 3 is a lower mold that rotates together with the rotary disk 2, and tooth profile 4 is provided around the rotary disk 2. It is rotated via a gear 5 that meshes with. There are two engagement holes 6 at opposing positions around the periphery of this rotary disk 2, that is, at 180° intervals around the periphery.
Each time the rotary disk 2 rotates 180 degrees, a piston rod 8 provided on the bed 1 is pushed out by an air cylinder 7 and fitted into the engagement hole 6, thereby positioning and fixing. The upper mold 9 has the same configuration as the lower mold 3 and is provided on the slider 10.
The slider 10 is rotated by the tooth profile 11 and the gear 12, and is positioned and fixed by the piston rod 14 of the air cylinder 13 provided in the slider 10 and the engagement holes 15, 15 every time it rotates 180 degrees. The gears 5 and 12 have gears 16 and 17 that mesh with each other, and the gears 16 and 17 have a gear shaft 18 that rotates integrally therewith, a bevel gear 19 and 20, a pinion shaft 21 with a one-way clutch, a pinion 22, and a rack. 2
3 rotates the upper and lower molds 9 and 3 by 180 degrees for each punching operation in conjunction with the movement of the slider 10, but this technical idea is within the same range as the conventional one, and the press processing is performed by rotating the upper and lower molds. Since the molds 9 and 3 must be firmly fixed to the frame, piston rods 13 and 14 are used to secure the molds. There is.

This structure and method are well within the scope of the conventional idea that in order to securely fix the mold, it must be fixed with special strong metal fittings.

[Problem that the invention attempts to solve]

Such conventional devices have the following drawbacks.

(1) The upper and lower rotary disks that rotate the mold and position it at the desired angle are fixed to the bed and slider of the structure that transmits the pressure force in a structure that is difficult to replace. It is an impossible structure. The tallest punch press machine is originally a processing machine equipped with a large number of molds, and its purpose was to automatically change the desired mold in a short time to perform various processing freely. A non-replaceable mechanism is also impossible to use and apply.

(2) Even so, if a press machine with replaceable dies were to be created using a die rotating platen mechanism with the structure shown in Figure 1, it would be several tens of times larger than the current turret punch press machine, due to the additional space required for the die rotating mechanism and the need to maintain the pressing force and strength.
Moreover, it results in expensive machines that are inaccurate, slow, and require huge amounts of energy.

(3) This method is important for turret punch press machines, which process a wide variety of products in small quantities, because it requires a lot of time and manpower to attach and detach the mold to the mold holder. This structure cannot be used or utilized because it does not meet the requirements for easy and quick mold setup.

(4) The upper mold 9 and the lower mold 3 are positioned and fixed to the slider 10 and the bed 1 through the engagement holes 15 and 6 provided on the outer periphery of the rotary disk 2 to which the molds are attached.
Since the piston rods 14 and 8 fit into the piston rods, the rotation stop positions of the upper and lower molds 9 and 3 are limited to the positions of the engagement holes 15 and 6, and they can freely rotate to any rotation position. positioning and fixing is not possible.

Furthermore, since the power system for rotating the mold is the slider 10 with constant momentum, the fitting hole can only be positioned at a position that divides the outer periphery of the rotary disk 2 by an integer.

(5) Rotating the upper and lower molds 9 and 3 by rotating the rotary disk 2, and moving the piston rods 14 and 8 to move the rotary disk 2 to the slider 10 and the bed 1.
Since the fixed positioning movement and fixed positioning movement are performed alternately and sequentially, the operation speed of one step is slow, so even in the best condition, the speed is less than 120 times/minute.

(6) Since it is impossible to position it at any arbitrary position, one shape can be made freely by machining in all angular directions with one mold, or by continuously punching over and over again by changing minute angles and positions. The processing to create it is completely impossible. Therefore, machining with a smooth and good finish is impossible.

(7) Since molds cannot be freely exchanged, complex processing using multiple molds is completely impossible.

(8) To rotate and position both molds 9, 3, operate the air cylinders 13, 7 to pull out the piston rods 14, 8 inserted into the rotary disk 2, rotate the rotary disk 2, and after stopping. , air cylinder 1
3 and 7 are operated in reverse to move the rotary disk 2 into the engagement holes 15 and 6.
Insert into. As there are three steps, the operating speed of each rotation position of the mold is slow, and even if it is made in the best condition, it is only possible to drive the mold at less than 120 times per minute.

On the other hand, there is a punching machine that uses a worm mechanism to change the direction of the die, as described in US Pat. It is a single-purpose machine that can only perform specialized processing. Therefore, the materials that can be processed are limited to weak materials that can be processed with only one blade (paper, cloth, organic materials such as cork).

Therefore, it is impossible to use or utilize it for processing materials that require a large cutting force, such as metals. Furthermore, only one type of shape can be processed depending on the mold, and there is no variety of processing that is aimed at by a turret punch press machine. This is also clear from the fact that this structure was created without any idea of automatically and quickly replacing the mold. Furthermore, the assembly of the mold to the mold holder requires a lot of time and manpower, and is unsuitable for a turret punch press machine that seeks good setup performance.

Based on the above, the specification of US Pat. No. 3,370,492 is used for a turret punch press machine that is suitable for high-mix, low-volume production and has high processing accuracy, high processing speed, and a highly adaptable mold rotation device that processes free shapes. and its applications are inconceivable in all respects.

In this way, a device has been proposed in which a pair of upper and lower dies are rotated to a specific position and then fixed to punch out a workpiece, but the It was thought that the only way to eliminate deviations in the angular position was to use a shot pin, such as a piston rod, to firmly fix it on the base. Since it is not possible to break away from the idea of using shot pins, the two contradictory movements of rotating and fixing the mold due to the existence of the shot pin must be performed, and punching is performed while rotating the mold. It was believed that it was not possible to perform this continuously at high speed and with high precision.

In addition, in recent years there has been a trend toward high-mix, low-volume production.
With the increasing demand for machining of a wide variety of shapes of workpieces and machining speed, punching processing that uses one type of die and gradually changes the punching angle takes advantage of the high speed and economic efficiency of press processing. There has been a strong desire to be able to perform a wide variety of punching operations, such as continuous notch operations that draw diagonal lines and curves, which are completely unachievable with the above-mentioned conventional techniques.

This invention was made in consideration of the above circumstances, and provides a turret punch press machine that can rotate and position the die at any angle, allowing punching of any shape and accelerating the processing speed and improving the accuracy, something that was impossible to achieve with the prior art.

[Means for solving problems]

The turret punch press machine according to this invention has an upper mold housing hole for vertically operating the upper mold, and is rotatable around the first rotation center line but immovable in the vertical direction. An upper mold holder provided on a rotatable upper mold turret substrate and a second rotation center line that accommodates the lower mold and are rotatable around a second rotation center line that coincides with the first rotation center line. In order to rotate the lower mold holder provided on the rotatable lower mold turret board, the upper mold holder, and the lower mold holder, the hole diameters of the upper mold holder and lower mold holder are a first rotating device and a second rotating device comprising a first worm wheel and a second worm wheel that rotate with a larger diameter and a rotation center line that coincides with the rotation center line;
In order to rotationally drive the first worm wheel and the second worm wheel, the first worm wheel and the second worm wheel are engaged with the first worm wheel and the second worm wheel, respectively, and rotate the upper mold turret substrate and the lower mold turret substrate. A first worm and a second worm parallel to each other are each supported by a pair of bearings having a rotational axis perpendicular to the axis.
a first drive device and a second drive device each having a worm; The first drive device and the second drive device prevent the couple of forces that tend to rotate the upper and lower molds when they are pressed by the hammer, and the upper and lower molds are rotated. It is held at a predetermined angular position.

[Effect]

In this invention, the upper mold holder is rotated by being transmitted to the first rotating device by the first driving device, and the lower mold holder is rotated by being transmitted to the second rotating device by the second driving device. The upper and lower holders are always aligned and positioned. Furthermore, the couple forces that tend to rotate the upper mold and the lower mold when the hammer is pressed are blocked by the first and second drive devices, respectively.

〔Example〕

FIG. 2 is a sectional view of the entire turret punch press machine showing one embodiment of this invention. In this diagram, 3
Reference numeral 1 denotes a servo motor as a rotational drive device that provides a rotational force necessary to change the angle of a mold, which will be described later, and is attached to a base 33 on a rotating shaft 32. The rotational force of the servo motor 31 is transmitted to the output shaft 34, and the bevel gear 35 fixed to the output shaft 34,
36, and a bevel gear 3 fixed to the tips of joint shafts 39, 40 that mesh with the bevel gears 35, 36 perpendicularly.
7 and 38, and is branched into a joint shaft 39 and a joint shaft 40. The rotating shaft 32 is a support for rotating the upper mold turret board 47, the lower mold turret board 56, and the base 33 for mold replacement.
A reduction gear 42 attached to the prime mover 41 and a reduction gear 43 attached to the rotating shaft 32 are connected to a prime mover 41 which is a turret rotation device for rotating the upper mold turret base plate 47 and the lower mold turret base plate 56. The rotational force decelerated through the rotating shaft 32
receives. Further, the rotating shaft 32 is supported by a bearing 44 placed in the middle and a bearing 45 placed at the bottom. On the other hand, the other end of the output shaft 34 that receives the rotational force of the servo motor 31 is also supported by a bearing 46 fitted into the base 33. The joint shaft 39 is arranged parallel to the upper mold turret board 47 and has a bearing 49 fitted in a housing 48 arranged on the base 33 side of the upper mold turret board 47.
and housings 52 and 53 arranged on both sides of the first worm 51 that rotates the upper mold holder 50.
It is supported by bearings 54 and 55 fitted therein and connected to the first worm 51. The joint shaft 40 is arranged parallel to the lower mold turret board 56, and has a bearing 57 arranged on the base 33 side on the lower mold turret board 56 and between the upper mold turret board 47 and the lower mold turret board 56. The second rotating mold holder 58
The housing 6 placed on both sides of the worm 59
The second worm 59 is supported by bearings 62 and 63 fitted in the inner worms 62 and 61, and connected to the second worm 59.

The upper mold holder 50 holds an upper mold 64, and the upper limit is determined by a receiving plate 65. A lower mold 66 is held in the lower mold holder 58 . A workpiece material 67 is inserted between the upper mold 64 and the lower mold 66, and the hammer 68 presses down the upper mold 64 to punch out the workpiece material 67. The above mechanism is incorporated into the frame 77. Next, the holding mechanism section will be explained in detail based on FIG. 3.

In FIG. 3, the upper mold holder 50 accommodates and holds an upper mold 64 in its central portion. A first worm wheel 50a is provided on the outer periphery of the upper end of the upper mold 64, and meshes with the first worm 51 to transmit rotational force and serves to determine the rotation angle position of the upper mold 64. , after rotation, the upper mold holder 50
It serves to fix the upper mold turret substrate 47 on the upper mold turret substrate 47. Reference numeral 69 designates a keyway cut into the hole surface for accommodating the upper mold 64 and determining the direction of the upper mold 64. A key 70 that determines the direction of the upper mold 64 protruding from the sliding surface of the upper mold 64 is fitted into this key groove 69, and the upper mold 64 rotates integrally with the upper mold holder 50. It's becoming like that. Receiving plate 65
is set at the upper limit by the stopper 71, and the spring 7
It is lifted by 2. Reference numeral 73 denotes a retaining fitting for the upper mold holder 50. Lower mold holder 5
8 accommodates and holds the lower mold 66 in the central portion. A second worm wheel 58a is provided on the outer periphery of the upper end of the lower mold 66, and engages with the second worm 59 to transmit rotational force and serves to determine the rotational position of the lower mold 66. It also serves to fix the lower mold holder 58 onto the lower mold turret substrate 56 after rotation. A key 74 protrudes from the side surface of the lower mold 66 to determine the direction of the lower mold 66. The key 74 is fitted into the key groove 75 of the lower mold holder 58, and the lower mold 66 is integrated with the lower mold holder 58. It curves and rotates. Further, the lower mold holder 58 is held on the lower mold turret substrate 56 by a retaining fitting 76. Figure 4 shows A- in Figure 3.
This is a cross-sectional view taken along line A', showing the relationship between the upper mold holder 50 equipped with the first worm wheel 50a and the first worm 51. Also, Figure 5 shows
This is a sectional view taken along the line BB' in FIG. 3, showing the relationship between the lower mold holder 58 provided with the second worm wheel 58a and the second worm 59.

The turret punch press machine according to this invention described above transmits the rotational force of the servo motor 31 attached to the base 33 on the rotating shaft 32 to the output shaft 34. The first branch is branched by rotating direction converting devices such as a bevel gear 35 and a bevel gear 36 arranged in the first
The upper mold holder 50 equipped with the first worm wheel 50a is rotated by the rotation of the first worm 51 and the second worm wheel 50 by the second worm 59. The lower mold holder 5 is equipped with a worm wheel 58a.
8 are configured to rotate and position them at the same time.

Next, the operation will be explained.

When the servo motor 31 rotates according to the command value based on a numerical command from the outside, the bevel gears 35 and 36 fixed on the output shaft 34 rotate, and this rotation is transmitted to the bevel gears 37 and 38. Since the bevel gears 37 and 38 are fixed to the connecting shafts 39 and 40, respectively, the connecting shafts 39 and 40 are rotated. Joint shaft 3
At the other ends of 9 and 40, there are first and second worms 5.
Since the worms 1 and 59 are connected to each other, the first and second worms 51 and 59 rotate. The upper mold holder 50 is provided with a first worm wheel 50a on each of the first and second worms 51 and 59.
Since the upper mold holder 50 and the lower mold holder 58 having the second worm wheel 58a are engaged with each other, the upper mold holder 50 and the lower mold holder 58 simultaneously rotate to the same rotation angle position. In other words, the servo motor 31
The upper mold holder 50 and the lower mold holder 5 due to the rotation of
The bevel gears 35, 36, 37, 38, the first and second worms 51, 59, and the first and second worm wheels 50a, 58a are combined so that the amount of rotation angle of the gears 8 is equal. Therefore, the key groove 69 cut in the upper mold holder 50
and the keyway 75 cut in the lower mold holder 58.
is always at the same rotational position. Therefore, the position of the upper mold 64 inserted into the upper mold holder 50 and the lower mold 6 attached to the lower mold holder 58 are determined.
Position 6 is always the same rotational position.

Now, the upper die 64 is struck by the processing by the hammer 68, the upper die 64 descends, and the workpiece material 67 is punched out. When changing the rotational positions of the upper die 64 and the lower die 66, the hammer 68 is raised and the upper die 64 is separated from the workpiece material 67, and then the upper die 64 is changed with the next punching command. The servo motor 31 rotates according to the command value until it comes into contact with the workpiece material 67,
The servo motor 31 is controlled so that the upper mold 64 and the lower mold 66 are rotated and positioning is completed.

The above control, punching operation and workpiece material 67
By combining this with the positioning operation, single punching or continuous notching becomes possible.

Note that if driven by one servo motor 31,
Even if a detection control device for preventing rotational positional deviation of the upper mold 64 and lower mold 66 is not provided, there is no rotational positional deviation, and processing accuracy is further improved.

[Effect of idea]

The turret punch press machine according to this invention has at least one pair of upper and lower dies provided on the upper and lower turret substrates, each of which is rotatable. First and second rotating devices housed in the holders and having first and second worm wheels that are much larger than the size of the housed molds rotate the upper and lower mold holders and also rotate the upper and lower mold holders. The driving device that drives the rotating device equipped with a worm wheel prevents the couple force that tries to rotate the mold that is generated when the hammer hits the upper mold housed in the mold holder and processes the workpiece material. This allows the upper and lower molds to be firmly held without shifting from the desired angular position, and by interacting with the command that can specify the desired angle at any angle of 360°, the mold can be accurately positioned at any angular position. It is now possible to set

In addition, with conventional turret punch press machines,
The mounting direction of the mold can only be in the fixed guide direction provided in the mold housing, and the number of types of holes that can be machined is limited to the number of molds that can be mounted on the turret, so there is less freedom in machining. However, with this invention, the mold can be set at any angle of 360°, so one mold can hold hundreds of molds. This produced essentially the same effect as dramatically increasing the number of molds mounted on the turret board. As a result, there are almost no restrictions on processing and it is possible to process any shape in any position, greatly expanding the range of products that can be processed and even making it possible to work in the cutting field.

Furthermore, one mold can function as hundreds or even thousands of parts, and the mechanism that rotates the mold is the same size as a conventional turret and can be mounted on the turret, so it can be used in common with conventional molds. This has made it possible to significantly increase the economic effect of mold investment. In addition, the large worm wheel diameter also reduces the enormous force generated between the workpiece and the die cutting edge when overlapping an already machined area during punching, etc. to rotate the die. The diameter of the worm wheel decreases by the inverse ratio of the size of the cutting edge of the mold and acts on the tooth surface of the worm wheel, so as with this invention, the diameter of the worm wheel can be made much larger than the size of the cutting edge of the mold, and the structure is The worm, which works to prevent rotation, and the bearing, which fixes this worm in the axial direction, work with reduced force, making it easy to fix the worm wheel, making it possible to securely fix it, and also to prevent the worm wheel tooth surface. Since there is no wear on the parts, the equipment has a long lifespan.

Furthermore, since the dimensional accuracy of the mold cutting edge is compressed in size ratio compared to the rotational accuracy of the worm wheel, the mold angle accuracy can also be maintained at an extremely high level of accuracy. In addition, continuous punching can be performed with high precision by repeatedly punching while changing the mold angle minutely, making it possible to produce high-quality smooth curves and diagonal lines with good straightness, which were previously impossible. By changing the shape, there are no shapes that cannot be processed. In addition,
The device itself that rotates and positions the mold holder at the desired angle position has the function of firmly holding the positioned mold holder on the upper mold turret substrate and the lower mold turret substrate. The two functions of rotation and holding can be performed in one action by one device, making it simpler and safer than performing the functions of rotation and holding separately, without malfunction, and combined with high-speed operation, the rotation of the mold can be improved. This makes it possible to repeat a series of processing operations, including positioning and punching, at extremely high speed.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an example of a conventional press device, FIG. 2 is a sectional view of the entire device showing an embodiment of this invention, and FIG. 3 is a sectional view showing details of the mold holding mechanism. 4 is a sectional view taken along line AA' in FIG. 3, and FIG. 5 is a sectional view taken along line BB' in FIG. 3. In the figure, 31 is a servo motor, 31 and 32 are rotating shafts, 33 is a base, 34 is an output shaft, 39 and 40 are joint shafts, 47 is an upper mold turret board, 50 is an upper mold holder, and 50a is a worm wheel, 51,59
is a worm, 56 is a lower mold turret board, 58 is a lower mold holder, 58a is a worm wheel, 64
66 is an upper mold, and 66 is a lower mold.

Claims (1)

[Scope of utility model registration request] a drive device for driving the hammer; an upper mold turret substrate and a lower mold turret substrate that are rotatably supported on a frame while facing each other; and a plurality of pairs of upper molds and a lower mold turret provided on both of the substrates. The lower mold and
The upper mold turret board and the lower mold turret board are rotated in order to select a desired pair of upper mold and lower mold from the plurality of pairs of upper mold and lower mold and set it below the hammer. a turret rotation device for moving the turret, and a command signal for performing a predetermined processing on a workpiece positioned between the upper mold turret substrate and the lower mold turret substrate. A turret punch press machine equipped with a control device for feeding the upper mold to the upper mold, which has an upper mold housing hole for vertically operating the upper mold, and is rotatable around a first rotation center line. an upper mold holder provided on the rotatable upper mold turret substrate so as to remain immovable in the vertical direction; A lower mold holder is provided on the rotatable lower mold turret substrate so as to be rotatable around a center line, and the upper mold holder is arranged to rotate the upper mold holder and the lower mold holder. A first rotating device comprising a first worm wheel and a second worm wheel that rotate with a rotation center line that is larger in diameter than the hole diameter of each of the mold holder and the lower mold holder and coincides with the rotation center line. and a second rotating device, which is engaged with the first worm wheel and the second worm wheel, respectively, for rotationally driving the first worm wheel and the second worm wheel, and is connected to the upper mold. A first worm and a second worm are supported in parallel to each other by a pair of bearings each having a rotational axis perpendicular to the rotational axis of the turret substrate and the lower mold turret substrate. The hammer presses an upper mold housed in an upper mold holder that is selectively arranged below the hammer and rotationally positioned at a predetermined angular position. The first drive device and the second drive device prevent the couple force generated when the upper mold and the lower mold are rotated, and the upper mold and the lower mold are rotated. A turret punch press machine characterized by being held at a predetermined angular position.