JPS5923890B2 - press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punch press machine in which a die, that is, a punch holder and a die holder that house a punch and a die, are respectively rotatable and the processing machine is positioned by a numerical control device (hereinafter referred to as an NC device). , relates to a press machine in which the punch and die are aligned when rotating both the punch and die holders.

In general, press machines using this type of NC device transport the workpiece to the processing position and position it according to commands from the NC device.
After that, the hammer operates according to a command from the NC device, strikes the punch, and processes the workpiece between the punch and the die.

With Kamiko's NC press machine, when changing the orientation of the punch and die, the NC press machine is stopped each time, and the specified mold is selected from a large number of prepared molds and replaced manually. Ta.

This exchange takes several minutes, so 10
In an NC press machine that performs processing 0 to 500 times, such manual replacement of punches and dies requires too much time and many molds, and is not practical. Therefore, even if the machine is a cylindrical turret punch press machine and is equipped with a large number of types of punches and dies, it has been impossible to create a turret that can accommodate a large number of dies to cut out a smooth curved surface. When a curved cut is forced, the workpiece is punched out with a round die and punch, shifting the work piece little by little, so the joining point becomes wavy and not straight, making it difficult to produce a product of good quality. In order to solve the above-mentioned problems, this invention drives the punch holder and die holder using separate rotation and drive devices, such as NC motors, and the relative positions of both holders can always be maintained in a predetermined relationship. It is.

In other words, if the punch holder and die holder are driven by separate NC motors, the relative positions of the punch and die may shift due to origin setting errors, servo errors, etc., and if processing is performed in this state, not only the punch and die but also the punch and die will be damaged. In addition, there is a risk that the device itself may be damaged, so driving it with a separate NC motor was dangerous and could not be put into practical use.However, this invention solves this problem by always aligning the origins of the punch holder and die holder before driving them. This is the solution. This invention will be explained below. FIGS. 1 and 2 are a partially cutaway side view and a plan view showing essential parts of an embodiment of the present invention. In these figures, reference numeral 1 denotes a rotary punch holder having gear teeth formed on its outer periphery, with which an intermediate gear 2 meshes and a reduction gear 3 further meshes.

A motor gear 4 is meshed with the reduction gear 3. 5 and 6 are bearings.

7 is an NC motor, to which a motor gear 4 is fixed.

The NC motor 7 is attached to a bracket 8, and the bracket 8 is fixed to an upper base 10 with mounting screws 9.
Reference numeral 11 denotes a rotary die holder with gear teeth formed on its outer periphery, an intermediate gear 12 meshing with this, and a reduction gear 13.
are meshing together.

A motor gear 14 is connected to the reduction gear 13. 1111 matches. 15 and 16 are bearings.

17 is an NC motor to which a motor gear 14 is fixed.

The NC motor 17 is attached to the bracket 18,
The bracket 18 is fixed to the lower base 20 by mounting screws 19. The reduction ratio of the gear between the NC motor 7 and the punch holder 1 and the reduction ratio of the gear between the NC motor 17 and the die holder 11 are set to be the same. A punch 21 is housed in the punch holder 1.

A die 22 is housed in the die holder 11.

Reference numeral 23 denotes a punch support plate, which is always biased upward by a holding spring 24 and has a plurality of upper limit stoppers 2 planted on the upper base 10.
The upper limit is limited by 5.

A rotatable support shaft 26 is held by a metal fitting 27 via a bearing 28, and the flange of the support shaft 26 is fixed to the upper base 10 with a mounting screw 29.

A rotatable support shaft 30 is held by a metal fitting 31 via a bearing 32, and a flange of the support shaft 30 is fixed to the lower base 20 by a mounting screw 33.

As a result, by rotating the support shafts 26 and 30, the upper base 10,
Although the lower base 20 rotates, this is the case in a turret punch press machine, and in the case of a general press machine, the support shafts 26, 30 do not need to rotate. Reference numeral 34 denotes an X-axis moving table, which is movable in the X-axis direction, that is, the axial direction of the guide pole 35 via a linear bearing 36 .

37 is easily attached to the X-axis moving table 34, and a gear of an NC motor 38 for driving the X-axis is meshed with this.

Reference numeral 39 denotes a Y-axis moving table, which connects the guide pole 40 to the Y-axis via a linear bearing 41, that is, the guide pole 4.
It is movable in the 0 axis direction.

42 is easily attached to the Y-axis moving table 39, and a gear of an NC motor 43 for driving the Y-axis is meshed with this.

Further, the guide pole 40 is fixed to the X-axis moving table 34. In this way, the Y-axis moving table 39 can move on the X-axis moving table 34 in the Y-axis direction. 44 is a clamper that holds the workpiece; 45 is a rail that fixes the clamper 44 to the Y-axis moving table 39; 46 has a roller at its tip that lifts the workpiece by moving upward; This is a mechanism for separating the workpiece from the die 22.

47 is a table base, 48 is a hammer, and 49 is a workpiece.

Reference numeral 50 denotes a detection disk for detecting the origin and check point of the punch holder 1, which similarly rotates once when the punch holder 1 rotates once.

Then, as shown in FIG. 3a, a hole 51 for setting the origin,
A hole 52 for a check point is provided. As shown in FIG. 3b, light-emitting diodes 53 and 54 and phototransistors 55 and 56 are connected to each other with this detection disk 50 in between.
is attached to the mounting bracket 57, and the light emitting diode 53
The light emitting diode 54 is arranged so that the light from the light emitting diode 54 enters the phototransistor 55 through the hole 51 and the light from the light emitting diode 54 enters the phototransistor 56 through the hole 52. The numbers shown in curly brackets in FIG. 3 indicate that a similar mechanism is provided on the die holder 11 side as well. That is,
58 is a detection disk, 59 is a hole for setting the origin, 60 is a hole for a check point, 61 and 62 are light emitting diodes, 6
3 and 64 are phototransistors, and 65 is a mounting bracket. In FIG. 3a, the upper portions of the mounting fittings 57 and 65 are removed, and in the case of the die holder 11 side, they are applied upside down. Next, the operation will be explained. First, the NC motors 7 and 17 are driven once. When the hole 51 is between the light emitting diode 53 and the phototransistor 55, and the hole 59 is between the light emitting diode 61 and the phototransistor 63, outputs Al and A2 as shown in FIG. 4 are output from the phototransistors 55 and 63. As the output rises, the NC motors 7, 17 start decelerating, but after an angle θ passes from the fall of the output, the NC motors 7, 17 stop as shown in FIG. 4, 11. Originally, the holes 51 and 52, 59 and 60 are separated by an angle θ2 from when the NC motors 7 and 17 start decelerating to when they stop with respect to the rotational direction. When the light emitting diode 17 stops, the light from the light emitting diode 54 enters the phototransistor 56, and the light from the light emitting diode 62 enters the phototransistor 64. Therefore, the output B from the phototransistors 56, 64 as shown in FIG. 4 111,
, B2 comes out. The fifth section shows this relationship in more detail.
It is a diagram. That is, the outputs Bl and B2 are output from the amplifier Ampl.
, Amp2, and then added to the AND gate,
Output will now appear. This becomes a signal that allows the NC device to start. In the unlikely event that for some reason the punch holder 1
If the amount of rotation of the die holder 11 and the amount of rotation of the die holder 11 are not equal and one or both of the outputs Bl and B2 are missing, no output will be output from the AND gate AND, so the NC
The device will not start. After setting the origin in this way, do not immediately judge that the orientations of punch holder 1 and die holder 11 match, but make sure to check whether punch holder 1 and die holder 11 match before changing the direction. Then, the NC device is activated starting from the point where the directions of the punch 21 and the die 22 exactly match.

Subsequent control is performed by the NC device 100 shown in FIG.

In FIG. 6, 101 is a start part, 102 is a calculation part, 10
3 is a command distribution section, 104 to 107 are comparison sections, 108 to 1
11 is an amplification section, 112 to 115 are detection sections, 116, 11
7 is a completion confirmation section, 118 is a finger cooling value zero detection section, and 119 is a gate.

As mentioned above, when an output is output from the AND gate (FIG. 5), it enters the start section 101 and is sent to the NC device 100.
starts. Commands from the calculation unit 102 are sent to the command distribution unit 10
3 and is decoded and distributed to each part. For example, Figure 1, Figure 2
In the case of the X-axis moving table 34 shown in the figure, the NC motor 38 rotates in response to a command, the detector 112 detects the amount of rotation, and the comparator 104 compares the input and output to find that there is no difference between the two. At this point, the movement of the X-axis moving table 34 stops. Similarly, the Y-axis moving table 39 is moved, and when the movement of both is completed, a confirmation signal is output from the completion confirmation section 116. Furthermore, similarly to the above, the punch holder 1 and the die holder 11 are also driven separately by the command from the command distribution unit 103, but since it has been confirmed that the origin of both coincides, unless the command is wrong, Both rotate by the same amount. When the rotation of both ends is thus completed, a confirmation signal is issued from the completion confirmation section 117. moreover,
Only when the command value zero detection unit 118 confirms that there is no command remaining in the calculation unit 102, the gate 119 opens and a punch signal is output from the calculation unit 102, which lowers the hammer 48 in FIG. Punch and process material 4
Start processing at 9. Then, each time the machining process is completed, check whether the punch holder 1 and die holder 11 are oriented in the same direction by setting both holders 1 and 11 to the origin position using numerical commands and checking the orientation. It is possible to detect positioning errors due to setting errors and malfunctions of the first drive mechanism.

In this way, it is possible to proceed with the machining steps sequentially while checking from time to time, and the rotation angles of the punch 21 and die 22 can be controlled to the required values by the same amount, and the X-axis moving table 34 and the Y-axis moving table 34 can be
Coupled with the control of the axis-moving table 39, it is possible to process the desired shape at a high speed of 500 times per minute by changing the direction of the mold.

In addition, in the above example, the holes 52 and 6 for check points are
0 is provided at the origin position, but this is for convenience of explanation; when both holes 52 and 60 are provided at arbitrary positions and the origin is set correctly, the light emitting diode 5
4 and 62 are transmitted through phototransistors 56 and 64, respectively.
Just make sure there are plenty of people.

As explained in detail above, the present invention is a numerically controlled press machine having a rotary punch holder and a rotary die holder, and in which both holders are driven by separate first and second rotation drive devices. Since the press is driven by the press, the mechanical configuration becomes extremely simple and it is extremely easy to apply it to existing press machines.

Moreover, the first detection means for detecting whether or not the predetermined check point of the punch holder matches the proper setting position, and the first detection means for detecting whether the predetermined check point of the turbo holder matches the proper setting position. and a second detection means for detecting whether or not the detection means match, and further includes a determination device that receives signals from both detection means and detects whether or not both detection means output matching signals. This prevents the numerical control device from starting unless both detection means are outputting matching signals, so when it starts, the punch and die are always aligned in the same direction, thus ensuring that the processing is complete. No defects will occur during the process. Furthermore, when one process of machining is completed, the punch holder and die holder are advanced to the origin position by a numerical command, and the device determines whether the first detection means and the second detection means both output matching signals. Since it is possible to automatically check at high speed whether or not the orientation during machining is consistent by looking at the mold, there is an advantage that machining can be performed at extremely high speed while changing the direction of the mold.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing the main part of an example of the invention, FIG. 2 is a plan view, and FIGS. 3A and 3B show the origin detector and check point detection means. A plan view and a side view showing the main parts, Fig. 4 is a timing diagram for explaining the operation of the origin detection mechanism and check point detection means, Fig. 5 is a circuit diagram of the main parts, and Fig. 6 is the overall control. FIG. 2 is a block diagram for explaining a sequence.

Claims (1)

[Claims] 1 A punch holder and a die holder that are rotatable, respectively, a first rotational drive device that rotates the punch holder at an arbitrary angle, a second rotational drive device that rotates the die holder at an arbitrary angle, and a rotary drive device that rotates the punch holder at an arbitrary angle. a first detection means for detecting whether a predetermined check point matches a proper setting position; and a first detection means for detecting whether a predetermined check point of the die holder matches a proper setting position. Second to detect
a determining device for receiving signals from the first and second detecting means and detecting whether both the detecting means output matching signals; and both the detecting means. a numerical value that sends a signal for rotating both the holders to the first and second rotational drive devices based on the output signal of the determination device when it is determined that both of them output matching signals; A press machine characterized by being equipped with a control device.