JPH0122053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a turret punch press, and more particularly to a turret punch press equipped with a rotating die.

As is well known, a turret punch press has a disk-shaped upper turret disk that supports a large number of punches, and a lower turret disk that supports a large number of dies corresponding to the punches, which are vertically opposed and rotate horizontally. It is set up so that it can be taken out freely. In a turret punch press, multiple punches and dies can be attached to the upper and lower turret plates, so if the punches have the same shape but different directions, you can create punches and dies with different directions. was.

As mentioned above, it is uneconomical to create punches and dies for different directions, so
Although molds have been developed in which the die can be rotated and indexed to a desired position, conventionally, the rotary indexing of the mold has been manually performed. Therefore, when the orientation of the holes varies,
In addition to being difficult to deal with, there were also problems in improving work efficiency.

Therefore, in order to solve the above problems,
A technology has been developed in which rotary molds are rotatably installed on the upper and lower turret plates, and each rotary mold is rotated and indexed using a servo motor.

The two rotary molds attached to the upper and lower turret plates are rotated by servo motors: one is to have a servo motor attached to each of the upper and lower turret plates, and the other is to have a servo motor attached to the frame of the press and There is a type in which each rotary mold on the turret plate is connected and disconnected via a clutch mechanism.

In the former configuration, since a servo motor is mounted on each of the upper and lower turret plates, there is a problem that the effective use of each turret plate is limited, and it is difficult to detect the coincidence of the directions of the upper and lower rotating molds. A detection device (for example, a pulse encoder that rotates in conjunction with the rotary mold) is required, and there is a problem that the configuration becomes complicated.

In addition, in the latter configuration, a clutch mechanism is required to connect and disconnect each servo motor and each rotary mold, making the configuration more complicated. A detection device is required to see the match.

This invention was made in view of the above-mentioned problems in the prior art.The purpose of this invention is to rotate the rotary metals attached to each turret plate when the upper and lower turret plates are indexed and fixed at predetermined positions. To provide a turret punch press capable of automatically positioning a mold at an origin position (reference position) with a simple configuration.

Therefore, according to this invention, each time the upper and lower turret plates are rotated and fixed at a predetermined position, each of the upper and lower rotary molds can be positioned at the origin position each time. The position can be corrected to the origin position even with a simple configuration. For example, by rotating the upper and lower rotary molds in the same direction in synchronization, it is possible to index the rotation so that the directions of the upper and lower rotary molds match. This eliminates the need and simplifies the configuration.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a gate-shaped turret punch press as an example of a turret punch press embodying the present invention. , a space 7 is provided. In this space 7, a transfer device 11 and a plate gripping device 13 for moving and positioning the plate 9 back and forth and left and right are arranged. There is an upper turret plate 17 that rotates integrally with the upper rotating shaft 15 held by the upper frame 5, and a lower rotating shaft 21 that is held by the lower frame 19 and rotates concentrically with the upper rotating shaft 15. A lower turret plate 23 is provided which rotates integrally with the lower rotating shaft.

The upper turret board 17 has a large number of punches 25.
However, the lower turret board 23 has a die 27 corresponding to each punch (only one is shown and the others are omitted).
is installed. This type of turret punch press 1 performs processing such as punching out a plate between a punch and a die indexed directly below a striker 31 provided at the lower end of a press ram 29 shown in the figure. It is something to do.

Incidentally, since this type of turret punch press is well known, a more detailed explanation will be omitted.

Next, to explain the main parts, as shown in FIG. 2, a servo motor 33 is attached to the frame of the turret punch press 1 of this embodiment, and its output shaft gear 35 and driven gear 37 The drive shaft 39 and the upper and lower sprockets 41, 43 attached thereto are integrally driven through the drive shaft 39. Further, an upper turret plate 17 equipped with a sprocket 49 at the upper end of the shaft by chains 45 and 47;
The lower turret plate 23 having a sprocket 51 at the lower end of the shaft is driven and rotated in the same direction, and a desired pair of punches and dies are indexed directly below the striker 31.

FIG. 4 is a plan view of the upper turret board 17.
The center of the punch 25 in the figure is named a processing center 53. The shot pin device 55 is attached to the machine body at a position making an angle of 120 degrees with a line connecting the processing center 53 and the center of the rotation axis of the upper turret plate 17. (The parts explained below are for the upper turret board 1.
7 and the lower turret plate 23, the technical concept is exactly the same, so the third intermediate gear 57 described later
Explaining the lower turret board that has only one set of
Upper turret panel equipment with the same function shall be given the same code. ) For example, a large number of positioning holes 59 are provided in the outer peripheral walls of the upper and lower turret plates at 10 degree intervals so that the centers of the punch and die match accurately when the pair of punch and die are positioned at the processing center 53. , is positioned by the shot pin device 55 described above.

That is, as shown in FIG. 2, the shot pin device 55 includes a fluid pressure cylinder 61 and a piston 62.
One end of the piston rod passing through the piston forms a shot pin 63 that can be freely engaged with and detached from the positioning hole 59 provided in the turret plate, and the other end is a bracket 67 of a dog 65 that detects the position of the shot pin.
It's getting old.

In the lower turret plate 23, a die 27 having a directionality such as an elongated hole is located at a machining center position 53 as shown in FIG.
For example, when facing the Y-axis direction (radial direction of the turret board) that matches the protruding direction of the punch in the figure,
When rotating 90 degrees in the X-axis direction (tangential direction at the right end of the Y-axis of the turret board), it is performed as follows.

That is, from a first geared pulley 71 attached to the output shaft of a servo motor 69 with a brake attached to the lower frame 19, through a timing belt 73, to a bracket 75 attached to the lower frame 19 at a position close to the lower turret board 23. The rotation is transmitted to the first intermediate gear 77 which is supported by and rotatable.

The first intermediate gear 77 includes two upper and lower gears, one of which is driven by the timing belt 73 described above, and the other of which is driven by the rotation shaft 21 of the turret board 23.
The second intermediate gear 81 is rotatably supported through a bearing 79 and meshes with the second intermediate gear 81 to transmit rotation.

The second intermediate gear 81 is coaxially equipped with a pulley 83 with a second gear, and again transmits rotation to the third intermediate gear 57, which is rotatably supported by the lower turret board 23, by means of a timing belt 85. (The upper turret board does not have a third intermediate gear.) The third intermediate gear 57 is connected to the lower turret board 23
Although all of the rotation transmission means are located below the lower turret plate, the die 27 to be rotated is located above the lower turret plate. It has the role of transferring it to the upper surface side. Therefore, the upper and lower gears of the third intermediate gear 57 have the same diameter and the same number of teeth, and the timing belt that transmits rotation from the upper gear to the die rotation gear 87 provided on the side surface of the die 27 is similar to the timing belt 85 described above. It can be regarded as an extension as it is and is given the number 85' (the punch rotation gear 87 has the same number of teeth as the die rotation gear, so it is given the same number). The punch and die pair located at the center are rotated by the same angle in the same direction by synchronously rotating the servo motor 69 with a brake, so the direction of the elongated hole as shown in FIG. It will be appreciated that it is possible to rotate, for example 90 degrees, from the axial direction to the X-axis direction. This angle is 90
It is not limited to the angle and can be freely changed to any angle, and it is also possible to use the upper and lower brake servo motors 69 as one unit and drive the first geared pulley 71 with one shaft. .

By the way, the turret punch press does not have a mechanism for fixing the rotating mold in a state where the direction has been changed, and the servo motor 69 with a brake is the driving source for rotating the rotating mold on the upper and lower turret plates. The rotation transmission system from the turret to the turret is always connected, and there is no clutch or brake involved, and there is no mechanism for fixing the rotating mold in a state where the direction has been changed, which reduces the weight of the turret and simplifies it. .

After changing the directionality of the rotary mold at the processing center position, by rotating the upper and lower turret plates, the directional punch and die will rotate on the upper and lower turret plates, but the processing center position punch to,
The same orientation must be maintained when the die is indexed again.

The servo motor 69 with a brake is numerically controlled, and the rotary mold can be rotated not only at the processing center position but also at any position or even while the turret is rotating. Although the directionality should have been aligned in the axial direction, it would be meaningless if it were misaligned when it was positioned at the center of the actual machining process, so the following measures were taken. be.

In other words, while the turret plate is rotating, the rotary mold, punch and die, are driven by the timing belt 85 and are forced to rotate because the second geared pulley 83 is stopped, making them integral with the turret plate. It operates a planetary gear that also revolves in order to rotate.

Therefore, when the number of teeth of the second geared pulley 83 mentioned above is Za, and the number of teeth of the punch and die rotating gear 87 is Zb, Za/Zb=an integer.

If we select 2 as this integer for one row, the rotating gear 87 of the punch and die with the stopped second geared pulley 83 as a sun gear rotates as a planetary gear, and the latter rotates once around the former. , 1 × (1 + Za / Zb) = 1 + 2 = 3, which is 3, which is the sum of one revolution and two rotations.
It will rotate. In this way, the punches and dies on the turret board rotate and revolve as the turret board rotates, but when they occupy the processing center position, the servo motor with brake 69 always specifies and memorizes the position. It maintains direction.

When the above ratio of the number of teeth is selected as 2, there are three positions that exhibit the same directionality, one of which is the setting position of the shot pin device 55 120 degrees away from the processing center as shown in Fig. 4. be.

The setting position of the shot pin position 55 is, for example, when the punch and die pair are on the turret board as described above.
In the example in which 36 sets are provided and the positioning holes 59 are provided at every 10 degrees on the outer peripheral walls of the upper and lower turret plates, any position that is a multiple of 10 degrees away from the processing center position without any other interference is acceptable. However, as explained below, it also serves the purpose of checking whether or not the directionality of the rotary mold is maintained correctly.

As shown in FIGS. 3 and 4, the punch and die rotation gear 87 is provided with a reference hole 89 corresponding to the height of the shot pin 63 when the punch and die occupy the reference direction. Further, a cylindrical body 91 is provided between the positioning hole 59 of the turret board and the reference hole 89, and therein is a small shot pin 93 that can be freely engaged with and detached from the reference hole 89, and a small shot pin 93 that is pressed by the shot pin 63 and is inserted into the cylinder body. The push rod 95 is pushed to the right in FIG.
The elastic body 97 is connected to the small shot pin 93 and the cylindrical body 9.
A second elastic body 99 is provided between the first elastic body 9 and the first elastic body 9.
7 has a larger stored force than the second elastic body 99. Further, 101 and 103 corresponding to the dog 65 of the shot pin device 55 shown in FIG. 2 are sensors for detecting the approach of the dog.

Devices such as a reference hole 89 and a small shot pin 93 provided in this rotary mold are a mechanism for correcting to maintain the correct reference direction when the rotary mold is located at the processing center position. Brake failure or timing belt 8
This is done every time work begins in order to check for abnormal elongation.

When the rotary mold is rotated to the position of the shot pin device 55 and the fluid pressure cylinder 61 is actuated to push the shot pin 63 into the positioning hole 59, the shot pin 63 pushes the push rod 95 to the right in FIG. further pushes the small shot pin 93 to the right, and if the rotary mold maintains the reference direction, the small shot pin 93 aligns with the reference hole 8.
9 to accurately correct the directionality of the rotary mold. In this state, the sensor 103 detects the dog 65 and issues a signal, so it can be confirmed that the rotary mold maintains the reference direction.

As can be understood from the above description of the embodiments, the present invention has a structure in which a lower turret supporting a plurality of dies 27 corresponding to the punches 25 is placed below an upper turret plate 17 supporting a plurality of punches 25. A board 23 is provided, and each of the above turret boards 1
A plurality of positioning holes 59 provided on the outer peripheral surfaces of 7 and 23
It is equipped with a shot pin 63 that can be freely engaged and detached from the
Dog 65 and sensor 1 for detecting engagement of shot pin 63 with positioning hole 59
The shot pin device 55 comprising the above-mentioned turret plates 17, 23 is made into a turret punch press provided correspondingly to each of the turret plates 17, 23.
A rotary mold supporting the punch 25 and the die 27 is rotatably mounted on the rotary mold 23, and each rotary gear 87 in each of the rotary molds is interlocked and connected to a servo motor provided on the frame of the press. , when the upper and lower turret plates 17, 23 are indexed to predetermined positions and each shot pin 63 is engaged with each positioning hole 59 at a predetermined position, each shot pin 6
Each of the upper and lower turret plates 17 and 23 is provided with a small shot pin 93 that is pressed by the pin 3 and engaged with a reference hole 89 provided in each rotating gear 87.

Therefore, according to the present invention, when the upper and lower turret plates 17, 23 are indexed to predetermined positions and each shot pin 63 of each shot pin device 55 is engaged with each positioning hole 59 at a predetermined position, the dog 65 and sensor 103 The engagement is confirmed by
The small shot pin 93 is engaged with and positioned at the reference position. Therefore, there is no need to again align the origin of the upper and lower rotary molds.
In other words, each positioning hole 59 at a predetermined position
Even with a simple structure in which the shot pins 63 are engaged with each other, the upper and lower rotary molds can be accurately positioned at their origin each time. Thereafter, by synchronously rotating the upper and lower rotary molds in the same direction, it is possible to easily perform rotational indexing in which the directions of the upper and lower rotary molds are matched.

In other words, the origin position of the rotary mold is determined each time at a predetermined position in the initial state before the start of machining. The directionality of the rotary mold can always be maintained in the same state.

[Brief explanation of drawings]

Fig. 1 is a front view of the turret punch press, Fig. 2 is a partially sectional detailed front view of the upper and lower turret discs of the turret punch press, Fig. 3 is a partially detailed view of Fig. 2, and Fig. 4 is a detailed front view of the turret punch press. The figure is a cross-sectional view taken along the - arrow in FIG. 2. (Explanation of symbols representing main parts of drawings), 1...
...Turret punch press, 17...Upper turret board, 23...Lower turret board, 25...Punch,
27...Die, 55...Shot pin device, 59
...Positioning hole, 63...Shot pin, 87...
...Rotating gear, 89...Reference hole, 93...Small shot pin.

Claims (1)

[Claims] 1. A lower turret board 23 supporting a plurality of dies 27 corresponding to the punches 25 is provided below the upper turret board 17 supporting a plurality of punches 25, and a lower turret board 23 is provided on the outer peripheral surface of each of the turret boards 17, 23. A shot pin device 55, which is equipped with shot pins 63 that can be freely engaged and detached from a plurality of positioning holes 59, and is also equipped with a dog 65 and a sensor 103 for detecting that the shot pins 63 are engaged with the positioning holes 59, is attached to each turret board. A turret punch press is installed corresponding to 17 and 23,
Each of the turret disks 17 and 23 is provided with a rotary mold that supports the punch 25 and the die 27, and is rotatably mounted thereon, and each rotary gear 87 in each of the rotary molds is connected to a servo motor provided in the frame of the press. When the upper and lower turret plates 17 and 23 are indexed to a predetermined position and each shot pin 63 is engaged with each positioning hole 59 at a predetermined position, each rotation gear 87 is pressed by each shot pin 63 and connected to each other. A turret punch press characterized in that each of the upper and lower turret plates 17, 23 is provided with a small shot pin 93 that engages with a reference hole 89 provided in the turret punch press.