JP2004009174A - Chamfering working method and abrasive jet working method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering working method and an abrasive jet working method with high versatility in which a problem of dust does not exist, efficient and accurate chamfering work can be carried out and the kind of material of the work is not restricted. <P>SOLUTION: In the chamfering work method, high pressure water 2 including an abrasive particle 21 is injected to a corner 41C at an end of the work 4. The corner 41C of the work 4 is worn and removed by making the injection direction of high pressure water 2 perpendicular to a surface 41l near the end of the work avoiding and injecting a part of a jet flow of the high pressure water 2 from the work. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for chamfering an end of a workpiece and an abrasive jet processing method.
[0002]
[Prior art]
There are burrs and corners at the processed end of metal or glass that has been mechanically processed such as cutting, or at the end of the casting as cast, so that people who handle them are liable to be injured and come into contact with other objects. Problems such as scratching occur. Therefore, in order to prevent this, a process of shaving off a corner including a burr at an end portion, that is, a so-called chamfering process has been performed.
Conventionally, chamfering was performed by grinding using tools such as sandpaper, files, diamond tools, and grinders.However, the working environment deteriorated due to the generation of dust during grinding, and low work efficiency due to manual work Also, there are problems such as variations in the chamfering finish due to differences in the degree of skill and fatigue of the workers.
[0003]
As a method for solving the above problem, Japanese Patent Application Laid-Open No. 2000-15566 discloses an efficient chamfering technology using sandblasting.
In addition, Japanese Patent Application Laid-Open No. 8-108287 discloses a chamfering technique using laser light. This technique eliminates the problem of dust and enables efficient and precise chamfering.
[0004]
[Problems to be solved by the invention]
However, in the chamfering technique by sandblasting disclosed in Japanese Patent Application Laid-Open No. 2000-15566, the abrasive particles hit not only the corners of the end of the workpiece but also the periphery thereof, and it is desired to damage the peripheral portion. If not, it is not suitable for precise chamfering, such as necessitating masking. Furthermore, with this technology, the problem of dust generation during chamfering still remains.
Further, the chamfering technology using laser light disclosed in Japanese Patent Application Laid-Open No. 8-108287 is a method in which the corner of the end of the workpiece is heated and melted and removed by the energy of the incident laser light. The target material that can be processed was limited, and versatility was poor. For example, glass (SiO ₂ ) cannot be chamfered because laser light is transmitted therethrough.
[0005]
The present invention has been made in view of the above-described problems in the related art, has no problem of dust, can perform efficient and precise chamfering, and has versatility in which the material type of the workpiece is not limited. It is an object of the present invention to provide a chamfering method and an abrasive jet machining method with high quality.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the inventor focused on a processing technique using an abrasive jet among water jet processing techniques, and studied a chamfering processing technique.
Abrasive jet processing is a type of water jet processing that uses a high-pressure, high-speed water jet containing abrasive particles. is there. Therefore, this processing technology is a versatile processing technology capable of processing all materials other than the special material that must not be exposed to water as the target material of the workpiece.
[0007]
Abrasive jet processing technology has been used mainly for cutting processing, but has also been used for part of chamfering processing. More specifically, the direction of jetting high-pressure water is inclined at a predetermined chamfer angle with respect to the surface near the end, for example, 45 °, and high-pressure water containing abrasive particles is jetted at the corner of the end to be removed by chamfering. Had gone. However, in this method, even if the end of the outer peripheral edge of the workpiece can be chamfered, the high-pressure water sprayed to the corner of the target end is adjacent to the end of the target end in a shape in which the ends are close to each other such as a hole. There is a limitation on the shape of the end of the workpiece in the application to the chamfering process because the peripheral portion may be damaged.
[0008]
Then, the inventor paid attention to the erosion mechanism due to the collision of the abrasive particles, which is a feature of the abrasive jet processing, and studied diligently, and came to the present invention.
That is, the chamfering method according to the first invention of the present application, which is provided to solve the above-described problem, applies a part of a jet of high-pressure water containing abrasive particles to a corner of an end of a workpiece, and The remaining part of the high-pressure water jet is removed from the workpiece and jetted, and the corner is abraded away.
[0009]
By this method, a flow of the injected high-pressure water is formed from the end of the workpiece to the outside of the workpiece, and the corner at the end of the workpiece is abraded by erosion along the flow. In addition, since there is no generation of dust and automation by NC control is easy, efficient and precise chamfering can be performed.
Here, as a shape of the chamfered portion, in a C (corner) chamfering, an ideal shape is a plane inclined downward at an angle of 45 ° (chamfering angle) with respect to a side forming an edge of the end portion. This can be realized by adjusting the injection angle with respect to the object, the distance between the nozzle and the workpiece, the nozzle moving speed, the injection pressure, the offset amount, and the like.
[0010]
A chamfering method according to a second invention of the present application provided to solve the above-mentioned problem is a chamfering method in which high-pressure water containing abrasive particles is jetted to a corner of an end of a workpiece. Abrasion removal of the corners of the workpiece by making the direction of injection perpendicular to the surface near the end of the workpiece and ejecting a part of the high pressure water jet from the workpiece. It is characterized by doing.
[0011]
According to this method, the high-pressure water injected perpendicular to the workpiece is formed into a flow from the end of the workpiece to the outside of the workpiece, and the erosion action along the flow forms the end of the workpiece. Corners are abraded away. In addition, since there is no generation of dust and automation by NC control is easy, efficient and precise chamfering can be performed.
Here, as a shape of the chamfered portion, an ideal shape is a plane inclined downward at an angle of 45 ° (chamfered angle) with respect to a side forming an angle of an end portion, and a distance between a nozzle and a workpiece, This can be realized by adjusting the nozzle moving speed, the injection pressure, the offset amount, and the like.
[0012]
A chamfering method according to a third aspect of the present invention provided to solve the above-mentioned problem is a chamfering method in which high-pressure water containing abrasive particles is jetted to a corner of an end of a workpiece. The end position of the object is detected, and while the jet of the high-pressure water is relatively moved with respect to the work along the locus of the end position, the jet direction of the high-pressure water is changed to the end of the work. A part of the jet of the high-pressure water is removed from the workpiece and injected to make the corner of the workpiece continuously wear-removed.
[0013]
This method is an application of chamfering similar to the second invention of the present application. Since the processing is performed while detecting the end, it is possible to continuously control the distance from which the jet flows from the end of the workpiece to be constant, and to perform stable chamfering for the continuous end Can be realized.
In this method, during processing, the position of the workpiece may be fixed and the high-pressure water jet may be moved, or the position of the high-pressure water jet may be fixed and the workpiece may be moved.
[0014]
An abrasive jet processing method according to a fourth aspect of the present invention provided to solve the above-mentioned problem is characterized in that in the abrasive jet processing method in which high-pressure water containing abrasive particles is sprayed onto a workpiece to perform processing, predetermined cutting is performed. The workpiece is cut by moving the high-pressure water jet relative to the workpiece based on the trajectory, and along the chamfering trajectory obtained by adding an offset amount to the workpiece side to the cutting trajectory. The jet flow of high-pressure water is moved relative to the workpiece, and the chamfering of the cutting edge of the workpiece to remove the corner of the cutting edge of the workpiece is performed continuously. I do.
[0015]
According to this method, it is possible to omit the processing step by performing the chamfering processing after the cutting processing by the abrasive jet. Further, it is possible to continuously control the distance at which the jet flow from the cut end of the workpiece enters by the NC control, so that stable chamfering can be realized for the continuous cut end. In addition, efficient and precise chamfering can be performed.
In this method, during processing, the position of the workpiece may be fixed and the high-pressure water jet may be moved, or the position of the high-pressure water jet may be fixed and the workpiece may be moved.
[0016]
An abrasive jet processing method according to a fifth aspect of the present invention provided to solve the above-mentioned problem is the fourth aspect of the present invention, wherein the offset amount is greater than 0% and 60% or less of a diameter of a nozzle for jetting the high-pressure water. It is characterized by the following.
[0017]
With this method, the shape of the ideal chamfered portion can be obtained. On the other hand, when the offset amount exceeds 60% of the diameter of the nozzle for jetting the high-pressure water, the inclined surface of the chamfered portion does not become a uniform flat surface, and the purpose of the chamfer cannot be achieved.
Here, the offset amount means a distance that enters the cutting end with reference to the center position of the injection nozzle of the abrasive jet processing at the time of cutting processing.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a configuration of an abrasive jet processing method according to an embodiment of the present invention will be described with reference to the drawings.
(Chamfer processing means)
The water jet processing apparatus used as the chamfer processing means of the present invention will be described. Water jet processing includes aquajet processing, a processing technology that uses high-pressure, high-speed water jets of only clear water, and abrasive jet processing, a processing technology that uses high-pressure, high-speed water jets containing abrasive particles. The invention employs abrasive jet processing.
[0019]
The water jet processing apparatus includes a booster pump that is a high-pressure water generator, a processing chamber having an injection nozzle that injects high-pressure water, a catcher that receives high-pressure water, and a processing table on which a workpiece is mounted, and an NC that performs processing control. It is composed of a control device and a terminal device used for inputting various data. In the processing chamber, an injection nozzle for injecting high-pressure water downward is disposed at the upper part, a catcher for receiving the high-pressure water is disposed at the lower part, and a processing table is disposed between the nozzle and the catcher to process the workpiece. I have. A straight passage through which the high-pressure water jet flows is secured between the nozzle and the catcher. Although the basic configuration of the apparatus is the same for both aquajet processing and abrasive jet processing, the structure of the injection nozzle is different, and an abrasive supply mechanism is further added to the abrasive jet processing.
[0020]
FIG. 1 shows a sectional configuration diagram of an injection nozzle used for abrasive jet processing. The injection nozzle 1 includes a water nozzle 11 having an orifice 111 mounted at a tip through which high-pressure fresh water 22 supplied from a booster pump (not shown) passes, a mixing chamber 12, and abrasive particles 21 from the tip. Abrasive nozzle 13 for injecting high-pressure water 2, water nozzle 11, mixing chamber 12 and abrasive nozzle 13, and abrasive particles 21 supplied from an abrasive supply mechanism (not shown) are introduced. And a nozzle body 14 having an opening 141. Here, the flow rate of the fresh water 22 introduced into the water nozzle 11 is controlled by a first flow control valve (not shown), and the supply amount of the abrasive 21 introduced into the nozzle body 14 is controlled by a second flow control valve. (Not shown).
[0021]
The high-pressure water 2 injected from the injection nozzle 1 is formed in the injection nozzle 1 through the following procedure.
(1) The high-pressure fresh water 22 supplied from the booster pump to the water nozzle 11 is accelerated when passing through the orifice 111.
(2) The accelerated high-pressure fresh water 22 and the abrasive particles 21 introduced from the abrasive inlet 141 are mixed in the mixing chamber 12.
(3) Fresh water 22 containing abrasive particles 21 is jetted from abrasive nozzle 13 as high-pressure water 2.
The capability of abrasive jet processing is based on the material of the workpiece, high-pressure water pressure, nozzle diameter (high-pressure water flow rate), nozzle moving speed, type of abrasive particles, amount of abrasive particles supplied, and between nozzle and workpiece The condition is selected depending on the type of processing, affected by the distance and the like.
By the way, the standard conditions for the cutting of soda glass having a thickness of 1.1 mm are as follows.
・ High pressure water pressure = 300MPa
・ Injection nozzle inner diameter = φ1.0mm
・ Type of abrasive particles = Garnet # 80
-Amount of abrasive particles supplied (amount of abrasive) = 50 g / min
・ Nozzle moving speed = 2.0 m / min
・ Nozzle distance = 1.0mm
In abrasive jet machining, cutting is the basic machining. The cutting process is a process in which a jet of high-pressure water containing abrasive particles sprayed vertically downward from a spray nozzle collides with a workpiece, and wear is removed until the portion penetrates vertically in the location, The processing forms an end with a 90 ° angle.
[0022]
(Chamfering principle)
FIG. 2 shows the principle of chamfering according to the present invention, which is carried out using the water jet processing apparatus.
FIG. 2 shows three small flows a, b, and c in a jet stream 2 of fresh water 22 containing abrasive particles 21 jetted vertically downward from the nozzle 1 to one end 41 of the workpiece 4. It is a diagram schematically showing the behavior. The angle viewed from the cross section of the corner 41c of the end 41 is 90 °. The minute flow is the minute flow on the inner side of the workpiece 4 among the diametrical positions parallel to the side 41L forming the corner 41c of the end 41 with respect to the jet 2 just above the colliding end 41. , A is a minute flow at the center, and c is a minute flow at the end 41 side.
[0023]
FIG. 2A shows a cross-sectional state at the start of the chamfering process. The micro-flows a and b collide near the corner 41 c of the end 41, and the micro-flow c comes off the workpiece 4 and ends at the end 41. After passing near the outside of the corner 41c, the flow is downwardly below the workpiece 4 in a state where it is slightly bent toward the outside of the end portion 41.
Immediately after the start of the chamfering process shown in FIG. 2A, the combined wear of cutting and deformation is started by the micro-flows a and b colliding near the corner 41c of the end 41, and the corner 41c is removed. The micro-flows a and b flow to the micro-flow c side after participating in the wear, and the micro-flow a further wears away the micro-flow b because the micro-flow a passes through the wear portion of the end portion 41 due to the micro-flow b. . That is, the amount of abrasion removed increases toward the end 41 of the workpiece 4.
The injection of the fresh water 22 is performed for a predetermined period of time, during which a process of removing the corner 41c of the end portion 41 by the mechanism described above is performed.
Finally, as shown in FIG. 2B, the corner 41c of the end 41 is completely removed, and a flat surface 41d inclined downward with respect to the side 41L is formed, thereby completing the chamfering process. Here, when the purpose is C (corner) chamfering, it is preferable that the value of the length X in the horizontal direction and the value of the length Y in the thickness direction removed by the chamfering process be as equal as possible. = Y means an ideal state of C chamfering, and the chamfer angle is 45 °. The surface 41d formed by the chamfering process needs to be a flat surface of a predetermined level or more.
[0024]
In the chamfering process of the present invention, as described above, a part of the high pressure water jet is caused to collide with the corner of the end of the workpiece, and the rest of the jet is removed from the end of the workpiece. is important. On the NC control surface, this is realized by adjusting the position of the injection nozzle based on the cutting trajectory by abrasive jet processing or the end of the workpiece.
[0025]
(Example)
Using a soda glass plate having a plate thickness of 1.1 mm as a workpiece, cutting was performed using the above water jet processing device, and then chamfering was performed under various conditions, and the state of the chamfering was evaluated.
(1) Processing Procedure The processing procedure will be described with reference to FIG.
(1) Cutting process (Fig. 3 (a))
The injection nozzle 1 is held at a predetermined distance from the workpieces 4 and 5, that is, at a height position of the nozzle distance, and the center of the injection nozzle 1 is arranged at a position C1 which is a cutting position of the workpieces 4 and 5. In this state, the soda glass was cut under the standard conditions for the above cutting. FIG. 3A is a cross-sectional view immediately after the end of the cutting process.
(2) Chamfering (Fig. 3 (b))
After the cutting process is completed, the injection nozzle 1 is moved from the position of the center C1 toward the workpiece 4 to be chamfered by the offset amount L, and the center thereof is arranged at the position C2, and the end portion 41C is chamfered. went.
[0026]
(2) Standard conditions for chamfering The conditions for chamfering were changed as follows, as appropriate.
・ Injection nozzle inner diameter = φ1.0mm
・ High pressure water pressure = 40MPa
・ Offset amount L = 0.4mm
・ Type of abrasive particles = Garnet # 80
-Amount of abrasive particles supplied (amount of abrasive) = 50 g / min
・ Nozzle moving speed = 2.0 m / min
・ Nozzle distance = 1.0mm
[0027]
(3) Measurement and evaluation method The cross-sectional shape of the end 41 of the workpiece 4 after the chamfering is observed with a microscope, and the horizontal length X and thickness removed by the chamfering shown in FIG. The length Y in the direction was measured.
The chamfering state was evaluated based on the relationship between the cross-sectional shape of the chamfered portion and the measured values X and Y, based on the ideal state of C (corner) chamfering.
As the chamfered surface, a surface having a flat surface of a predetermined level or more was determined to be good, and a surface having irregularities or roundness was determined to be defective.
The difference (XY) between them was determined as the relationship between the measured values X and Y, and the case where the value was ± 300 μm or less was judged to be good, and the case where the value was less than −300 μm and exceeded 300 μm was judged to be bad.
[0028]
(Example 1)
Among the chamfering processing conditions, a high-pressure water pressure was changed stepwise from 20 to 100 MPa under a constant feed rate condition to prepare a test sample. The result is shown in FIG.
Good chamfering was possible in the range of high-pressure water pressure of 40 MPa or more and 60 MPa or less. In addition, the length Y in the thickness direction removed by the chamfering process increased as the high-pressure water pressure increased, and the value of (XY) was much less than -300 μm at 80 MPa or more.
[0029]
(Example 2)
Of the chamfering processing conditions, the offset amount L was changed stepwise to 0.2 to 1.4 mm (20 to 140% with respect to the inner diameter of the injection nozzle) to prepare a test sample. The result is shown in FIG.
Good chamfering was possible in the range of the offset amount L of 0.6 mm or less (60% of the inner diameter of the injection nozzle). In addition, when the offset amount L was 0.8 mm or more (injection nozzle inner diameter 80%) or more, the unevenness of the chamfered surface was large, and the state was defective. As the state of the jet during the chamfering, a state was observed in which the jet after hitting the corner of the workpiece rebounded to the upper jet nozzle side. If the small flow c shown in FIG. 2 does not exist or is small, the high-pressure water jet does not form a uniform flow flowing out of the end of the workpiece after colliding with the corner of the workpiece. In addition, it is considered that the processed surface did not become flat and unevenness became large due to uneven wear.
[0030]
(Example 3)
Among the chamfering conditions, the amount of the abrasive was changed stepwise from 20 to 150 g / min to prepare a test sample. FIG. 6 shows the result.
Even when the amount of the abrasive was changed, there was no significant change. However, it was recognized that the larger the amount of the abrasive, the better the finish of the chamfered surface.
[0031]
(Example 4)
A test sample was prepared by changing the nozzle moving speed stepwise from 1.0 to 10.0 mm / min among the chamfering processing conditions. FIG. 7 shows the result.
Good chamfering could be performed at a nozzle moving speed of 1.0 mm / min or more and 3.0 mm / min or less. In addition, the length Y in the thickness direction removed by the chamfering process became smaller as the nozzle moving speed became higher, and the value of (X−Y) was much larger than 300 μm at 7.0 mm / min or more.
[0032]
(Example 5)
Among the chamfering processing conditions, a test sample was prepared by changing the nozzle distance h stepwise from 1.0 to 10.0 mm. FIG. 8 shows the result.
When the nozzle distance h was 1.0 mm, good chamfering could be performed. In addition, when the nozzle distance h was 3.0 mm or more, the chamfered surface was rounded, so it was determined to be defective.
The above is the evaluation result for the purpose of C chamfering. If strict chamfering is not required, a rounded chamfered surface may be obtained by increasing the nozzle distance h as in the fifth embodiment.
Although the above results are for the case where soda glass is used as the workpiece, chamfering can be performed on other types of materials by adjusting the processing conditions.
[0033]
(Example 6)
The abrasive jet processing method by NC control was implemented using the water jet processing apparatus. According to the respective standard conditions of the cutting process and the chamfering process, an elliptical component was cut out from a soda glass plate having a thickness of 1.1 mm by a cutting process, followed by a chamfering process.
The processing procedure will be described with reference to FIG.
(S1) A soda glass plate having a thickness of 1.1 mm as a workpiece is fixedly installed on a processing table.
(S2) The processing conditions for cutting and the processing conditions for chamfering are input and set from the terminal device of the water jet processing device. The chamfering at this time aims at C chamfering.
(S3) Cutting trajectory data created in advance based on the elliptical shape is input.
(S4) An offset amount for chamfering is selected and input from a range of more than 0% and 60% or less of the inner diameter of the injection nozzle. This setting may be performed in the above step (S2). The trajectory data of the injection nozzle at the time of chamfering is created from the setting data and the cutting trajectory data input in step (S3).
(S5) The injection nozzle relatively moves on the workpiece based on the cutting trajectory data and cuts the workpiece based on processing conditions for cutting. The relative movement of the injection nozzle and the workpiece at this time is a movement on the XY horizontal plane. For example, the movement of the injection nozzle is controlled in the X direction, and the processing table on which the workpiece is fixedly installed is moved in the Y direction. The movement is controlled.
(S6) After the completion of the cutting process, the processing condition for the cutting process is corrected to the processing condition for the chamfering process. At this time, the spray nozzle may return to the cutting processing start position and perform chamfering from the beginning, or may perform chamfering in a direction going back from the cutting processing end position to the start position.
(S7) The injection nozzle relatively moves on the workpiece based on the chamfering trajectory data and cuts the workpiece based on the processing conditions for the chamfering. The chamfering at this time is performed by the mechanism described with reference to FIG.
Through the above steps, a series of processing operations is completed.
According to this procedure, the cutting and chamfering of the elliptical part were actually performed. The cut as the designed shape was achieved, and the C chamfering near ideal was achieved. It was also confirmed that this processing method can cut and chamfer a plurality of elliptical components from one soda glass plate without any problem.
[0034]
Here, the abrasive jet processing method of continuously performing the chamfering processing after the cutting processing has been described, but by providing the water jet processing apparatus with an end detection device including a monitor camera and an image processing device, the cut processing is performed. It is also possible to chamfer the workpiece. That is, the end position is detected by an end detection device, and NC control for causing the injection nozzle to enter the workpiece by a specified offset amount based on the position data is performed to perform chamfering.
[0035]
【The invention's effect】
According to the chamfering method according to the present invention, the injected high-pressure water forms a flow from the end of the workpiece to the outside of the workpiece, and the erosion effect along the flow causes the end of the edge of the workpiece to flow. The corners are abraded away. In addition, since there is no generation of dust and automation by NC control is easy, efficient and precise chamfering can be performed.
In addition, since the processing is performed while detecting the end, it is possible to continuously control the distance from which the jet flows from the end of the workpiece to enter, so that the continuous end is stable. Chamfering can be realized.
[0036]
According to the abrasive jet processing method of the present invention, it is possible to omit the processing steps by performing the chamfering processing after the cutting processing. Further, it is possible to continuously control the distance at which the jet flow from the cut end of the workpiece enters by the NC control, so that stable chamfering can be realized for the continuous cut end. In addition, efficient and precise chamfering can be performed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional configuration diagram of an injection nozzle used for abrasive jet processing according to the present invention.
FIG. 2 is a principle diagram of chamfering of the present invention, which is performed using a water jet processing apparatus.
FIG. 3 is a cross-sectional view showing an offset state of chamfering according to the present invention.
FIG. 4 is a diagram showing test results of Example 1 according to the present invention.
FIG. 5 is a diagram showing test results of Example 2 according to the present invention.
FIG. 6 is a diagram showing test results of Example 3 according to the present invention.
FIG. 7 is a diagram showing test results of Example 4 according to the present invention.
FIG. 8 is a diagram showing test results of Example 5 according to the present invention.
FIG. 9 is a process chart showing a machining operation procedure of an abrasive jet machining method by NC control according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Injection nozzle 2 ... High pressure water jet 4,5 ... Workpiece 11 ... Water nozzle 12 ... Mixing chamber 13 ... Abrasive nozzle 14 ... Nozzle body 21 ... Abrasive particles 22 ... Fresh water 41 ... End 41c ... Corner 41L ... Side 111 ... Orifice 141 ... Abrasive introduction port a, b, c ... Microflow C1 ... Cutting position C2 ... Chamfering processing position

Claims (5)

A part of the jet of high-pressure water containing abrasive particles is applied to the corner of the end of the workpiece, and the remaining part of the jet of high-pressure water is removed from the workpiece and jetted, and the corner is abraded away. A chamfering method. In a chamfering method of spraying high-pressure water containing abrasive particles to the corner of the end of the workpiece,
The high-pressure water injection direction is perpendicular to the surface near the end of the workpiece,
And, by removing a part of the jet of the high-pressure water from the workpiece and injecting it,
A chamfering method, wherein corners of the workpiece are removed by wear. In a chamfering method of spraying high-pressure water containing abrasive particles to the corner of the end of the workpiece,
Detecting the end position of the workpiece,
While moving the high-pressure water jet relative to the workpiece along the trajectory of the end position, the jet direction of the high-pressure water is set to be perpendicular to the surface near the end of the workpiece. And ejecting a part of the high pressure water jet from the workpiece,
A chamfering method, wherein the corners of the workpiece are continuously worn away. In the abrasive jet processing method of processing by spraying high pressure water containing abrasive particles to the workpiece,
Cutting the workpiece by moving the high-pressure water jet relative to the workpiece based on a predetermined cutting trajectory,
The jet flow of the high-pressure water is moved relative to the workpiece along a chamfering trajectory obtained by adding an offset amount to the workpiece side to the cutting trajectory, and a corner of the cutting end of the workpiece is adjusted. An abrasive jet machining method comprising continuously chamfering a cut end of a workpiece to be abraded. 5. The abrasive jet processing method according to claim 4, wherein the offset amount is set to be larger than 0% and 60% or less of a diameter of a nozzle for jetting the high-pressure water.

Images