JPH06503761A - Integrity detector for fluid jet nozzles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Integrity detector for fluid jet nozzles Background of the invention TECHNICAL FIELD This invention relates generally to fluid jet nozzles, and more particularly to fluid jet nozzles. In other words, the origin is used to detect the flow characteristics of the fluid jet and the state of the nozzle office. This relates to a flow rate sensor installed in a room downstream of a filter.

In fluid jet cutting and cleaning machines, the condition of the nozzle assembly is This results in considerable differences in the amount of body jets. The more coherent the flows, the more In general, the ability to cut the flow becomes effective and efficient.

In the past, many different methods were used to monitor the condition of the nozzle nozzle. Among these Visual inspection of fluid jet flow, measurement of fluid jet vibration frequency, and Monitoring of noise created by cuts, cut dimensions and fluid jets There is a measurement of the surface finish of surface grinding.

Other methods of monitoring nozzle condition include direct inspection of the nozzle orifice and nozzle construction. There is a measurement of the weight of the structure. To realize these methods, the fluid jet must be stopped. the nozzle must be removed. Also, before discovering the defective orifice may cause considerable damage to the parts being cut.

Abrasive fluid jet cutting machine and cleaning machine power (this is particularly difficult to monitor) The flow characteristics of the downstream fluid jet are at the orifice and adjacent to the orifice. It depends not only on the specifics of the fluid jet, but also on the shape and dimensions of the chamber and funnel, and the Depends on the type and amount of abrasive used (which can also be affected). (Whether or not it is within permissible limits and whether any flow anomalies occur during fluid jetting.) It is difficult to monitor whether this is causing the problem.

The foregoing are limitations that are known to exist in current fluid jet cutting and cleaning machines. An example is 0. The aim of this effort is to overcome one or more of the limitations mentioned above. do. It is clear that it is convenient to offer substitutes. So Therefore, we will later provide a suitable alternative with more complete features as disclosed.

Summary of the invention In one aspect of the invention, the nozzle has a first nozzle formed therein. This is accomplished by providing a device that includes an assembly. Highly pressurized fluid source Force (in fluid communication with the nozzle orifice, causing fluid jets in the first nozzle nozzle) discharged into the nozzle assembly through a nozzle orifice. Inside the room A detector for detecting the state of the fluid in the chamber is connected to the fluid in the nozzle nozzle No. Gives an indication of quality.

The foregoing and its aspects, together with the accompanying drawings (when considered, the following details of the invention) Detailed explanation ability A is obvious (Konaru).

Brief description of the drawing FIG. 1 comprises a detector of the invention. Implementation of IIE polishing abrasive fluid dinoto nozzle equipment FIG. 3 is a side sectional view illustrating an example.

FIG. 2 shows another embodiment of a polishing fluid jet nozzle apparatus including multiple detectors of the present invention. It is a side sectional view illustrating.

Figure 3 shows the workpiece of the fluid jet nozzle device (position adjustment for aligning two pairs of positions). Still another embodiment of No. 11 of the fluid jet nozzle device with a detector and equipped with a regulating means. FIG.

Figure 4 shows the workpiece fluid jet nozzle assembly; Side section of the last embodiment of the fluid jet nozzle device with detector with position adjustment means It is a front view.

detailed description In this specification, elements of different embodiments that perform the same function are given the same reference characters. It will be done. FIG. 1 (also illustrating a fluid jet nozzle device 10). fluid jets The nozzle device 10 includes a nozzle assembly 12, a nozzle pipe 14, and a nozzle nut 16. I-). Nozzle assembly 121 includes a nozzle therein as is well known in the art. A first nozzle 18 is formed.

Nozzle tube 14 is in fluid communication with nozzle orifice 18 and includes fluid jet 20. is created downstream of the nozzle assembly and enters the chamber 22. Detector 24 connects chamber 22 with fluid. I am passing through.

Many factors influence the shape and nature of fluid jet 20. These factors The state of the nozzle orifice 18 as well as the fluid pressure applied inside the nozzle tube 14 Contains form. The cutting effectiveness and accuracy of the cut depends on the condition of the fluid jet 20. I'm influenced by that. Therefore, fluid jets in fluid jet cutting and cleaning applications It is highly desirable to constantly monitor the condition of the cut 20.

In this application, either the flow meter 25 or the pressure detector 27 is used as the detector 24. Can be used. Both types of detectors provide a reliable indication of the condition of the fluid jet 20. give. It may be desirable to provide both a pressure sensor 27 and a flow meter 25. Ru. Particularly in situations where the detector is monitored by a computer, the pressure detector 27 The allowable value for the indicated pressure is within the specified range indicated by the flowmeter 25. The preset range can be set to zero or vice versa.

This type of detector can be used in the non-abrasive fluid jet cutting application shown in Figure 1 or in the non-abrasive fluid jet cutting application shown in Figure 2. Applicable to both abrasive fluid jet cutting applications. In Figure 2, the abrasive inlet Means 26 communicate with chamber 22. A funnel tube 28 is provided downstream of the chamber 22; It is coaxial with fluid jet 20. One or more control valves 30 control the fluid flow abrasive inlet. It can be applied to control stage 26 or detector 24. In using the control valve 30 Thus, the detector 24 and the abrasive population means 26 can be applied as desired.

For abrasive fluid jet cutting applications, fluid jet cutting machine operating parameters (related The parameters include the dimensions of the nozzle orifice 18, the dimensions of the funnel tube 28, and the fluid pressure. There are types and sizes of forces and abrasives applied to the fluid. ) depends on There is an appropriate abrasive supply rate.

All of the above parameters are based on the dimensions of the nozzle orifice 18 and the funnel tube 28. remains unchanged during most cutting applications except for the cutting method. These two dimensions are subject to wear. It changes because it occurs. Therefore, the optimum abrasive feed rate cannot be changed during the cutting process. This wear is monitored by the change in indication indicated by the detector 24. I can see it.

The response to changes in the detector can be automated or manual in the abrasive feed rate. You can also respond by making changes.

Since the wear of the funnel tube 28 is monitored by the detector 24, the present invention makes it easier for the operator to Provides a reliable, quantitative indication of whether funnel tube 28 meets acceptable standard values. Conventional In this technique, the operator constantly monitors the fluid jet using non-quantitative standard values. It is necessary to determine when the nozzle falls below the desired standard value. Conventional technology is correct Requires skilled workers to function properly.

Yet another application in abrasive fluid jet cutting is large size injected pomegranates. Detection of blockage of funnel tube 28 during the cutting process due to stone particles. This blockage is quickly revealed by the index of the detector 24.

The detector 24 ranges in complexity from a visual detector that must be observed by the operator. It may even extend to sending a signal to the microprocessor 32. micro The processor controls the application of fluid to the nozzle tube when the fluid flow quality falls below a preset limit of non-dripping. It can be used to stop something.

Information from the microprocessor may even be an input to the position adjustment means 33. can. This decreases the quality of the fluid jet and increases the width of the flow, making the cutting edge It is assumed that the width of the workpiece cut by the fluid jet 20 will increase. Ru.

For the indication given by the detector 24, the cut has the given dimensions. It produces the result that it should. Therefore, the adjustment means are fluid jet nozzle equipment. Reposition the orientation relative to the workpiece in position 10 to compensate for the increased size of the fluid jet. can do. The adjusting means may be a fluid jet nozzle device 10 (see FIG. 3) or a It should be appreciated that any of the workpieces 36 (see FIG. 4) can be repositioned.

While the invention has been illustrated and described in accordance with a preferred embodiment, other modifications and variations may be made. It is recognized that the invention can be made without departing from the invention stated in the claims. Ru.

Claims (20)

[Claims] 1. a nozzle assembly having a nozzle orifice formed therein; in fluid communication with the nozzle, the fluid jet passing through the nozzle orifice to the nozzle. a source of highly pressurized fluid discharging into a chamber downstream of the slurry assembly; a flow in said chamber that is in fluid communication with said chamber and gives an indication of the quality of the nozzle orifice; and detector means for detecting the condition of the body. 2. 2. The apparatus of claim 1, wherein the sensor is a fluid pressure sensor. 3. 2. The apparatus of claim 1, wherein said detector means is a fluid flow meter. 4. 2. The sensor of claim 1, wherein the sensor is both a fluid pressure sensor and a fluid flow sensor. equipment. 5. further comprising abrasive inlet means for introducing an abrasive into said chamber, said detector means The apparatus of claim 1 in fluid communication with said abrasive inlet means. 6. further comprising an abrasive inlet in fluid communication with the chamber, the detector means being in fluid communication with the chamber; The apparatus of claim 1 in communication with an abrasive inlet means. 7. a nozzle assembly having a nozzle orifice formed therein; in fluid communication with the nozzle orifice, the fluid jet communicating with the nozzle orifice; the highly pressurized gas discharged through the chamber into the chamber downstream of the nozzle assembly. fluid source and of the fluid in said chamber that is in fluid communication with said chamber and gives an indication of the quality of the fluid jet. and detector means for detecting a condition. 8. The orientation of the fluid jet relative to the workpiece is determined by the quality of the fluid jet. 8. The apparatus of claim 7, further comprising position adjustment means for adjusting based on instructions. 9. 8. The apparatus of claim 7, wherein the sensor is a fluid pressure sensor. 10. 8. Apparatus according to claim 7, wherein said detector means is a fluid flow meter. 11. 8. The sensor of claim 7, wherein the sensor is both a fluid pressure sensor and a fluid flow sensor. equipment. 12. further comprising abrasive inlet means for introducing an abrasive into said chamber, said detector means 8. The apparatus of claim 7, in fluid communication with said abrasive inlet means. 13. further comprising an abrasive inlet in fluid communication with said chamber, wherein said detector means is in fluid communication with said chamber; 8. The apparatus of claim 7 in communication with said abrasive inlet means. 14. a nozzle assembly having a nozzle orifice formed therein; in fluid communication with the nozzle orifice, the fluid jet communicating with the nozzle orifice; The highly pressurized gas is discharged through the chamber downstream of the nozzle assembly. fluid source and a detector in fluid communication with the chamber; The orientation of the fluid jet relative to the workpiece is based on an indication of the quality of the fluid jet. and a position adjustment means for adjusting the position according to the position. 15. adjusting the orientation of the fluid jet based on an indication of the quality of the fluid jet; 15. The apparatus of claim 14, further comprising position adjustment means. 16. 15. The apparatus of claim 14, wherein the sensor is a fluid pressure sensor. 17. 15. The apparatus of claim 14, wherein said detector means is a fluid flow meter. 18. 15. The sensor of claim 14, wherein the sensor is both a fluid pressure sensor and a fluid flow sensor. The device described. 19. further comprising abrasive inlet means for introducing an abrasive into said chamber, said detector means 15. The apparatus of claim 14, wherein is in fluid communication with the abrasive inlet means. 20. further comprising an abrasive inlet in fluid communication with said chamber, wherein said detector means is in fluid communication with said chamber; 15. The apparatus of claim 14 in communication with abrasive inlet means.