JPH056062Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a processing device for automatically processing a metal plate-shaped workpiece into a complex curved shape.

[Prior art]

For example, large-area steel plates that are bent and formed into complex curved contours are often used in aircraft fuselages, wings, etc. Conventionally, these steel plates with shapes that are easy to process have been rolled-formed. However, for complex shapes, it is generally done by press forming, in which a large hydraulic press hits a roller against a steel plate placed on a rubber plate while changing the pressure. This is done by sequentially correcting and finishing according to the situation.

[Problem that the invention attempts to solve]

With the above-mentioned conventional technology, it is impossible for one worker to process a large steel plate, and when two or more workers work together, they must confirm the forming position and send signals to each other. It is complicated and
It also involved some risks. In addition, in order to reduce the weight of the fuselage of an aircraft and meet the requirements for a certain level of strength, for example, the thickness of the plate is made thicker around the window frame, thinner at the periphery, and thicker at other parts. Because the skin milling process differs depending on the area, conventional molding methods require extremely complicated manual work, and the desired strength cannot be obtained with conventional press molding alone, so a separate process is required to increase the strength. There is a problem in that it requires a number of steps and cannot simplify the manufacturing process. Therefore, the present invention was devised to eliminate the drawbacks of the prior art described above, and the shot peening machine is capable of spraying a metal plate-shaped workpiece according to the difference in thickness of each part. The aim is to provide a processing device that can automatically process a desired curved surface shape by changing the pressure, and at the same time increase the strength of the workpiece, simplifying the manufacturing process and improving work efficiency. This is what we aim to achieve.

[Means to solve the problem]

The structure of the present invention for achieving the above object will be explained based on FIGS. 1 to 3 corresponding to the embodiment.
and/or the table 17 on which the workpiece W is placed.
An actuator for moving on the XY axes, a solenoid valve 18 for injecting and stopping shot from the nozzle of the shot peening device, and a hose 14 for supplying compressed air to the nozzle are provided to control the output pressure of this hose. A regulator 30 that controls the injection pressure from the nozzle by adjusting the opening degree of the valve 40 according to an injection pressure setting signal input to the controller while monitoring the detection signal of the pressure sensor 33 to be detected by the controller 32. Then, a reading device reads a drawing depicting a portion of the metal plate-shaped workpiece W having the same thickness, and the sheet thickness differs depending on the portion, and a signal output device 20 that processes the output signal from this reading device is used. It is characterized by comprising a processing means 21 that sends an opening/closing control signal to the electromagnetic valve and sends an injection pressure setting signal to the controller.

[Effect]

Therefore, the signal output device 20 is output from the reading device according to the drawing depicting the same part of the workpiece W with the same thickness.
The solenoid valve 1 of the nozzle 12 that outputs a signal to the controller 32 of the regulator 30 via the actuator to adjust the injection pressure of the shot of the shot peening device 10 and moves over the workpiece surface by the actuator.
By outputting a signal to 8 and injecting a shot to perform peening processing at a predetermined pressure, the workpiece W can be processed into a desired curved shape even if the thickness of the workpiece W differs in each part. . At the same time, the workpiece W can be processed to the desired strength due to the effect of shot peening.
Strength can be increased.

【Example】

Hereinafter, details of the present invention will be explained based on figures shown in examples. In FIG. 1, reference numeral 10 denotes a pneumatic shot peening device, which is equipped with a tank 11 containing a large number of shots made of steel balls. This tank 11
One end of a hose 13 communicates with the bottom of the nozzle 12, and the other end of the hose 13 communicates with the nozzle 12. The nozzle 12 is placed in the Z direction of the main body of the processing device so that it faces the workpiece W at a right angle at a certain distance.
It is installed on a headstock (not shown) that is movable up and down on a shaft, and the injection distance is adjusted by an operation panel 44 (see FIG. 4). Further, the headstock or the table 17 on which the workpiece W is placed is configured to be movable in the XY-axis directions or in the respective X or Y-axis directions by an actuator (not shown), and the actuator always moves the nozzle 12 over the entire surface of the workpiece surface. It is designed to move relatively back and forth over a certain area covering the area. Further, a hose 14 that supplies compressed air from a compressor (not shown) communicates with the nozzle 12, and a solenoid valve 18 that performs injection and stop operations of the shot.
is provided. A regulator 30 is provided in the middle of the hose 14. As shown in FIG. 2, this regulator 30 is provided with a compressed air supply port 34 and an output port 35 in the lower part of the main body 31.
A passageway 36 is formed therebetween. Further, a back pressure chamber 37 is formed in the upper part of the main body 31, and this back pressure chamber 37
communicates with an opening 38 at the upper end of the main body 31. The supply port 34 and the back pressure chamber 37 are communicated through a pipe 42. Also, the output port 35 has a pipe 35.
One end of the pipe 35a communicates with the other end of the pipe 35a, and a pressure sensor 33, which will be described later, faces the other end of the pipe 35a. A valve 40 is provided in the center of the main body 31, and the upper end of the valve 40 is located in the back pressure chamber 37, and the lower end abuts against a spring 41.
is urged upward, and normally closes the passage 36. A flapper 39 made of a piezoelectric element is provided above the opening 38 at the upper end of the main body 31, and this flapper 39 is connected to the controller 3 from the output device 20.
When the input signal to the opening 38 increases, the opening 38 is deflected in the direction of closing the opening 38. A pressure sensor 33 detects the output pressure at the output port 35 via a pipe 35a, converts it into an electrical signal, and sends it to the controller 32. This controller 32 is connected between a processing means 21 having a signal output device 20 (to be described later) and a flapper 39, and is connected to the flapper 39 so that the output pressure at the output port 35 has a value commensurate with the signal from the signal output device 20. Automatically add corrective action to the situation. Processing means 2 connected to the controller 32
1, as shown in FIG. 4, an XY cross table 45 equipped with a tracer for reading drawings, and a signal output device 20 to which a reading signal from this tracer is input.
It is composed of. The tracer is driven by X-axis and Y-axis motors 46 and 47 equipped with position detection means, and moves above the drawing set on a cross table 45.
At this time, the tracer synchronizes with the movement of the nozzle 12 by receiving a signal from the position detector 48 that detects the position of the nozzle 12, which is relatively moved in the XY-axis directions over the entire surface to be processed by the actuator. , and moves the nozzle 12 in the XY axis directions on the drawing in a reduced scale form. The tracer is equipped with a reading device for reading the same part of the plate thickness shown in the drawing, and the identification signal (reading signal) of the plate thickness of each part on the drawing read by the reading device is sent to a signal output device 20. Send to. The signal output device 20 is composed of a microcomputer or a sequencer, and processes the input signal from the tracer and outputs the solenoid valve 18 for injection/stop of the nozzle 12 and the regulator 3.
Outputs a control signal for controlling the operation of 0. Here, the change in camber when subjected to the same shot peening is inversely proportional to the square of the thickness, so in order to obtain the desired contour, the desired contour and plate thickness must be adjusted based on the data obtained in advance. By outputting an injection pressure setting signal specifying a corresponding appropriate pressure to the regulator 30, the injection pressure of the shot from the nozzle 12 can be controlled to an appropriate pressure according to the plate thickness. The processing means 21 connected to the electromagnetic valve 18 and the regulator 30 is numerically controlled via an NC device from a drawing of each portion of the same plate thickness, or a CAD/NC device capable of NC processing.
It may be configured to be connected to and controlled by a CAM system. In addition, the table 17 on which the workpiece W is placed is
It consists of a conveying device such as a roller conveyor, and this
It is also possible to have a configuration in which the nozzle 12 is moved in the Y-axis direction, and a screw conveyor for collecting the ejected shot is installed below the movement locus of the nozzle 12. W is a steel plate that is a workpiece, and as shown in Fig. 3, the entire plate has a rectangular plate shape, and the thickness of the plate differs depending on each part.For example, the three square parts 4 in the center
3a is 3 to 4 mm, and the surfaces of both end edges in the width direction and the elongated surface 43b between the respective rectangular portions 43a are 4 to 5 mm.
The surfaces 43c at both ends in the longitudinal direction are skin milled to have a thickness of 5 to 6 mm. Next, the processing steps will be explained. Prepare a 1/10 or 1/5 drawing of the workpiece. Depending on the thickness of the workpiece W, drawings of three parts 43a to 43c each having the same thickness are produced. Identification parts are provided on the drawing by painting parts of the same thickness black, and in conjunction with the movement of the nozzle 12 of the processing device, the identification parts on the drawing can be followed by a tracer made of, for example, a reflective phototube. . The processing device is now in operation, and the actuator of the nozzle 12 and/or the table 17 causes the nozzle 12 to move in a zigzag pattern over the entire surface of the workpiece surface on the XY axes. (i) Operation when using one XY cross table 45 To process the identification part of the portion 43a of 3 to 4 mm or less, first, a tracer that moves above the drawing on the XY cross table 45 in conjunction with the nozzle 12,
When the identification part painted in black is detected, the signal output device 20 outputs an opening control signal to the solenoid valve 18 to open the valve 18 when this detection signal is input, and the pressure setting signal from the output device 20 is received in advance. The shot is injected from the nozzle 12 via the solenoid valve 18 at an injection pressure regulated by a regulator 30. Thereby, the same portion 43a can be peened at a predetermined pressure. When passing through this part, a control signal from the signal output device 20 is sent to the solenoid valve 18.
is closed, stopping shot injection. Similarly, next, a drawing showing the plate thickness of 5 to 4 mm of the surfaces 43b at both ends of the workpiece W in the width direction and the elongated surface 43b between the respective rectangular portions 43a is placed on the XY cross table 45. Set to . At this time, the shot is naturally injected at a predetermined pressure appropriate to the set pressure of the regulator 30, and the same portion 43b is peened. Next, the drawings showing the plate thickness of the remaining surface 43c (6 to 5 mm) are sequentially set on the XY cross table 45, and the pressure is adjusted to a suitable predetermined pressure using the solenoid valve 18 and the regulator 30. Part 43c is peened. The setting pressure of the regulator 30 is automatically adjusted by the regulator 30, which receives a signal from the signal output device 20 into which a signal for determining the plate thickness is input in advance. The set pressure can also be adjusted sequentially from the keyboard 49 via the signal output device 20. (ii) Operation when three XY cross tables 45 are used In this case, drawings for each plate thickness are set on each cross table 45, respectively. The drawing on each cross table 45 shows the nozzle 12
These are read by tracers that move in synchronization with each other, and an identification signal for the plate thickness of each portion on the drawing is sent to the signal output device 20. Here, since the three tracers provided in each cross table 45 move simultaneously on the drawing, identification signals for the plate thickness of each part are sequentially sent to the output device 20. By inputting to the processing procedure 21 in advance which plate thickness drawings are set on each cross table 45, the signal output device 20 can determine which plate thickness the signals sent from each tracer correspond to. It can be determined whether the signal is an identification signal or not. Note that the drawings for each plate thickness may be drawn in different colors or in brightness and darkness, and the drawing state may be detected on the tracer side so that the plate thickness of each part can be determined. The signal output device 20 is. , sends an opening/closing control signal to the solenoid valve 18 in synchronization with the input and stop of the signal from the tracer, and sends an injection pressure setting signal to the regulator 30 in accordance with the plate thickness value of the input signal. As a result, the injection pressure of the shot is sequentially changed and controlled by the regulator 30 to an appropriate pressure according to the plate thickness, and the workpiece W can be automatically peened. Here, the signal output device 20 is connected to the controller 32.
The operation after the injection pressure setting signal is input from is explained below. When the injection pressure setting signal input to the controller 32 increases, that is, when trying to increase the injection pressure of the shot to a predetermined pressure, the flapper 39 bends in a direction to close the opening 38 of the main body 31 of the regulator 30. On the other hand, the compressed air supplied to the hose 14 is guided from the supply port 34 of the main body 31 to the back pressure chamber 37 via the pipe 42, and the pressure in the back pressure chamber 37 is reduced to the opening 38.
It rises according to the opening degree. This allows valve 4
0 is pushed down in proportion to the pressure setting signal and the passage 3
6 is opened, and the compressed air supplied to the hose 14 is guided from the supply port 34 to the output port 35. Output port 35
The compressed air discharged from the tank 11 is supplied to the hose 14, and by pressurizing the tank 11, it is supplied to the shot hose 13, so that the shot is injected from the nozzle 12 together with the compressed air at a higher pressure. When setting the shot injection pressure to a low pressure,
This is done in the opposite manner to the above. As described above, the steel plate workpiece W can be automatically processed into a desired curved surface shape. Note that the shot peening process may be performed on both sides of the workpiece W to further increase the strength of the steel plate W while maintaining the desired curved surface shape. Shot peening can increase the strength of the workpiece W by peening the workpiece W at high speed.
When colliding with the workpiece W, the workpiece W is strongly hit,
This is because the compressive stress of the workpiece W increases.

【effect】

As explained above, according to the present invention, machining can be performed by spraying a shot onto the surface of the workpiece while controlling the spray pressure according to the thickness of each part of the workpiece. This has two major effects: it is possible to automatically process workpieces with different thicknesses on each part of the machined surface into the desired curved shape, and the strength of the workpiece can be increased by processing using shot peening. can be obtained at the same time. In addition, by using the processing device according to the present invention,
It is possible to simplify the manufacturing process and improve work efficiency.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a schematic diagram showing a shot peening device 10, Fig. 2 is a sectional view of a regulator, and Fig. 3 is a perspective view showing a steel plate W as a workpiece. FIG. 4 is a block diagram of the processing means. 10... shot peening device, 11... tank, 12... nozzle, 13, 14... hose, 1
7...Table, 18...Solenoid valve, 20...Signal output device, 21...Processing means, 30...Regulator, 31...Main body, 32...Controller, 3
3... Pressure sensor, 34... Supply port, 35... Output port, 35a... Pipe, 36... Passage, 37... Back pressure chamber, 38... Opening, 39... Flutter, 40...
...Valve, 41...Spring, 42...Pipe, 43a...
...Square portion, 43b, 43c...surface, 44...
Operation panel, 45...Cross table, 46...X-axis motor, 47...Y-axis motor, 48...Position detector, 49...Keyboard.

Claims (1)

[Scope of Claim for Utility Model Registration] An actuator that moves a nozzle of a shot peening device and/or a table on which a workpiece is placed on the XY axis, and an actuator that injects and stops shot from the nozzle of the shot peening device. While the controller monitors the detection signals of the solenoid valve and the pressure sensor that is installed on the hose that supplies compressed air to the nozzle and detects the output pressure of this hose, the controller adjusts the pressure according to the injection pressure setting signal that is input to the controller. A reading device reads a drawing depicting a regulator that controls the injection pressure from the nozzle by adjusting the opening of the valve, and a drawing depicting the same part of the thickness of a metal plate-shaped workpiece whose thickness varies depending on the part. processing means for transmitting an opening/closing control signal to the electromagnetic valve via a signal output device that processes an output signal from the reading device, and for transmitting an injection pressure setting signal to the controller. Device.