Cavitation surface treatment nozzle and cavitation surface treatment device

Abstract

To provide a cavitation surface treatment nozzle capable of giving a strong compression stress to a target object surface and promoting grinding of the target object surface.SOLUTION: A cavitation surface treatment nozzle 10 includes a nozzle tip 13. The nozzle tip 13 includes: a first plan surface 13a from which liquid is jetted and perpendicular to a jet axis 1; a second plan surface 13b perpendicular to the jet axis 1 and being an opposite surface from the first plan surface 13a; and a nozzle hole 21. The nozzle hole 21 includes: a semi-columnar discharge groove 23 arranged in the first plan surface 13a and extending in a first direction perpendicular to the jet axis 1; a jet hole 25 extending along the jet axis 1, connected to the discharge groove 23, having a long diameter extending in the first direction and having a right elliptic columnar shape having an oval cross section; and an introduction part 27 having a right circular cone surface 27a with the jet axis 1 as a center axis and connected to the jet hole 25.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a cavitation surface treatment nozzle and a cavitation surface treatment device. [Background technology]

[0002] A nozzle having a plate, a hollow body, and a cap assembled to the hollow body and holding the plate to the hollow body is known (US2024 / 0001549A1, hereinafter referred to as Patent Document 1). Summary of the Invention [Problem to be solved by the invention]

[0003] According to Patent Document 1, there are cases where high compressive stress is not applied or where the amount of surface grinding is small. An object of the present invention is to provide a cavitation surface treatment nozzle and a cavitation surface treatment device that can impart strong compressive stress to the surface of an object and promote grinding of the surface of the object. [Means for solving the problem]

[0004] A first aspect of the present invention is A nozzle tip comprising: a first plane from which the liquid is ejected and which is perpendicular to the ejection axis; A second plane that is perpendicular to the injection axis and is opposite to the first plane; A nozzle hole, a semi-cylindrical discharge groove disposed on the first plane and extending in a first direction perpendicular to the ejection axis; an ejection hole extending along the ejection axis and connected to the ejection groove, the ejection hole having a right elliptical cylindrical shape with an elliptical cross section whose major axis extends in the first direction; an introduction portion having a right circular cone surface with the injection axis as a central axis and connected to the injection hole; a nozzle hole having A cavitation surface treatment nozzle having a nozzle tip having a

[0005] A second aspect of the present invention is a processing tank for storing a processing liquid; a table disposed in the treatment tank and on which a workpiece is placed; the cavitation surface treatment nozzle; a nozzle pipe to which the cavitation surface treatment nozzle can be attached, the nozzle pipe being movable in the front-back direction, the up-down direction, and the left-right direction relative to the table; This is a cavitation surface treatment.

[0006] Nozzle tips are made of, for example, gemstones, artificial gemstones, or sintered bodies based on artificial gemstones. Nozzle tips are made of industrial-grade polycrystalline or monocrystalline materials such as sintered diamond, or additively manufactured mixtures of natural or synthetic materials or crystalline materials with a Mohs hardness of 8 or higher. Nozzle tips are made of, for example, corundum, diamond, or sintered artificial diamond. Two planes being substantially identical means that one plane is contained within a range of 0.5 mm from the other plane. The nozzle tip and the support base may be integrally formed, for example, the nozzle tip and the support base may be made of the same material. Corrosion-resistant alloys are, for example, stainless steel, nickel steel, and nickel aluminide. The injection angle is preferably 5 to 15 degrees, and more preferably 7 to 10 degrees.

[0007] The treatment liquid stored in the storage tank is composed of, for example, a rust inhibitor and water. The processing liquid stored in the storage tank may have an abrasive suspended therein. [Effects of the Invention]

[0008] According to the present invention, a strong compressive stress can be applied to the surface of the object, and grinding of the surface of the object can be promoted. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a perspective view of a cavitation surface treatment nozzle according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a cavitation surface treatment nozzle according to an embodiment of the present invention; [Figure 3] View of arrow III in Figure 1 [Figure 4] Cross section of line IV-IV in Figure 3 [Figure 5] Cross section of line VV in Figure 3 [Figure 6] Cavitation surface treatment device of this embodiment [Figure 7] Enlarged view of the cavitation treatment device of this embodiment DETAILED DESCRIPTION OF THE INVENTION

[0010] 1 to 5, a nozzle (cavitation surface treatment nozzle) 10 of this embodiment has a nozzle body 11. The nozzle body 11 has a nozzle tip 13 and a support base 15. The nozzle 10 has an ejection axis 1. For convenience, the first direction is defined as X, the direction in which the ejection axis 1 extends is defined as Z, and the direction perpendicular to XY is defined as Y.

[0011] The nozzle tip 13 is a right circular cylinder centered on the ejection axis 1. The nozzle tip 13 is made of a sintered diamond body. The nozzle tip 13 has a first flat surface 13a, a second flat surface 13b, a cylindrical surface 13c, and a nozzle hole 21. The first flat surface 13a and the second flat surface 13b are perpendicular to the ejection axis 1.

[0012] The nozzle hole 21 is disposed about the injection axis 1. The nozzle hole 21 has a discharge groove 23, an injection hole 25, and an introduction portion 27. The ejection groove 23 is disposed on a first plane. The ejection groove 23 extends in the X direction. The cross section of the ejection groove 23 parallel to the YZ plane is semicircular. The ejection hole 25 extends along the ejection axis 1. The ejection hole 25 has a right elliptical cylindrical shape. As shown in FIG. 3, the cross section of the ejection hole 25 in the XY plane is elliptical. The center of the cross section is located on the ejection axis 1. The major axis of the cross section extends in the X direction. The introduction portion 27 has a right circular cone shape. The introduction portion 27 is a body of revolution centered on the injection axis 1. The introduction portion 27 has a right circular cone surface 27a. The right circular cone surface 27a has a diameter that decreases toward the first plane 13a. The right circular cone surface 27a is directly connected to the elliptical cylindrical surface of the injection hole 25.

[0013] Support base 15 has nozzle tip chamber 15a, second bottom surface 15b, first bottom surface 15c, and jet flow passage hole 15d. Support base 15 is in the shape of a right cylinder centered on injection axis 1. Support base 15 is made of, for example, stainless steel. First bottom surface 15c is substantially flush with second flat surface 13b of nozzle tip 13. The distance between first bottom surface 15c and second flat surface 13b is, for example, 0.5 mm or less. Nozzle tip chamber 15a is a right circular cylinder centered on injection axis 1 and extends from first bottom surface 15c. Nozzle tip 13 abuts nozzle tip chamber 15a at both first flat surface 13a and cylindrical surface 13c. Nozzle tip 13 is fixed to nozzle tip chamber 15a. Jet passing hole 15d is a right circular cylinder centered on injection axis 1. Jet passing hole 15d may be a stepped hole. Jet passing hole 15d is connected to nozzle tip chamber 15a. Jet passing hole 15d may be a right elliptical cylinder or a right circular cone. The cross section of a conical jet passing hole increases with increasing distance from nozzle tip 13.

[0014] As shown in FIG. 6, the cavitation surface treatment device 50 includes a treatment tank 51 , a nozzle pipe 57 , a packing 58 , a cap 59 , a nozzle 10 , a table 53 , a high-pressure pump 56 , and a moving device 55 .

[0015] A processing liquid is stored in the processing tank 51. A table 53 is placed in the processing tank 51. The workpiece 3 is placed on the table 53. An abrasive may be suspended in the processing liquid in the processing tank 51.

[0016] The nozzle 10 is disposed in a nozzle pipe 57. The nozzle pipe 57 has a nozzle chamber 57a, a male thread 57b, a fluid passage 57c, and a packing groove 57d. The nozzle chamber 57a is a right cylinder and opens at the tip of the nozzle pipe 57. The nozzle chamber 57a is connected to the fluid passage 57c. The nozzle 10 is disposed in the nozzle chamber 57a. The nozzle chamber 57a, the male thread 57b, the fluid passage 57c, and the packing groove 57d are disposed coaxially with the injection axis 1. The packing groove 57d is disposed on the bottom surface of the nozzle chamber 57a. The nozzle 10 abuts against the nozzle chamber 57a. The packing 58 is, for example, an O-ring. The packing 58 is disposed in the packing groove 57d and seals the gap between the nozzle pipe 57 and the nozzle 10. The cap 59 has a female thread 59a and a jet passage 59b. The jet passage 59b is connected to the jet passage hole 15d.

[0017] The high-pressure pump 56 is, for example, a plunger pump. The high-pressure pump 56 is connected to a fluid passage 57c. The movement device 55 is connected to the nozzle pipe 57. The movement device 55 can move the nozzle pipe 57 left and right, up and down, and back and forth.

[0018] As shown in FIG. 7 , with the nozzle 10 of this embodiment, the treatment water supplied from the high-pressure pump 56 flows from the introduction portion 27 into the ejection holes 25, where it is straightened and accelerated. Because the first bottom surface 15c and the second flat surface 13b are substantially identical, the treatment water smoothly flows into the introduction portion 27. The treatment water is ejected from the elliptical cylindrical ejection holes 25 through the ejection grooves 23. The straightened treatment water is forcefully ejected from the ejection holes 25 and spreads flatly on the XZ plane by the ejection grooves 23. Because the ejection holes 25 are elliptical cylindrical, the sprayed treatment water easily spreads in the X direction. The ejection angle is preferably 5 to 15 degrees. More preferably, the ejection angle is 7 to 10 degrees. This causes the treatment liquid stored in the treatment tank 51 to spread vigorously on the XZ plane, promoting the formation of cavities. The treatment liquid containing many cavities then collides with the workpiece 3. This promotes the application of compressive stress to the surface of the workpiece 3.

[0019] The nozzle hole 21 and the second plane 13b on which the inlet of the nozzle hole 21 is disposed are made of sintered diamond, which reduces the amount of wear when the processing liquid flows at high speed. The cap 59 is detachable from the nozzle pipe 57. Therefore, when the cap 59 becomes worn, it can be easily replaced. The nozzle tip 13 has high hardness, so it is resistant to wear. In addition, the support base 15 is made of corrosion-resistant steel or high-tensile steel, so it has excellent durability.

[0020] When abrasive particles are mixed in the treatment tank 51, the surface of the workpiece 3 is ground by the abrasive particles. Because the flow rate of the treatment water ejected from the nozzle 10 is high, the abrasive particles are accelerated and collide with the surface of the workpiece 3. This promotes grinding of the surface of the workpiece 3. When the abrasive particles are turbid, wear of the nozzle 10 is accelerated. However, the nozzle hole 21 and the first plane 13a on which the outlet of the nozzle hole 21 is arranged are made of sintered diamond. Therefore, wear of the nozzle hole 21 and the first plane 13a is suppressed.

[0021] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention, and all technical matters included in the technical ideas described in the claims are subject to the present invention. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims. [Explanation of symbols]

[0022] 1 Injection axis 10. Cavitation surface treatment nozzle 11 Nozzle body 13 Nozzle Tip 13a 1st plane 13b 2nd plane 15 Support stand 21 nozzle hole 23 Discharge groove 25 Spout hole 27 Introduction

Claims

1. A nozzle tip comprising: a first plane from which the liquid is ejected, the first plane being perpendicular to the ejection axis; a second plane perpendicular to the injection axis and opposite to the first plane; A nozzle hole, a semi-cylindrical discharge groove disposed on the first plane and extending in a first direction perpendicular to the ejection axis; an ejection hole extending along the ejection axis and connected to the ejection groove, the ejection hole having a right elliptical cylindrical shape with an elliptical cross section whose major axis extends in the first direction; an introduction portion having a right circular cone surface with the injection axis as a central axis and connected to the injection hole; a nozzle hole having A cavitation surface treatment nozzle having a nozzle tip having a

2. the nozzle tip is columnar, with the first flat surface and the second flat surface as both end surfaces; The cavitation surface treatment nozzle according to claim 1.

3. A right cylindrical support base, a first bottom surface that is substantially coplanar with the second bottom surface; a nozzle tip chamber disposed on the first bottom surface, in which the nozzle tip is disposed and which abuts against the nozzle tip; a second bottom surface opposite to the first bottom surface; a jet flow passage hole extending from the second bottom surface along the jet axis and connected to the nozzle tip chamber; Further comprising a support base having A cavitation surface treatment nozzle (10) according to claim 1 or 2.

4. The nozzle tip has a Mohs hardness of 9 or more. The cavitation surface treatment nozzle according to any one of claims 1 to 3.

5. The support base is made of a corrosion-resistant alloy or high-tensile steel. The cavitation surface treatment nozzle according to any one of claims 1 to 4.

6. The support base is separate from the nozzle tip. The cavitation surface treatment nozzle according to any one of claims 1 to 5.

7. the support base is integral with the nozzle tip; The cavitation surface treatment nozzle according to any one of claims 1 to 5.

8. a processing tank for storing a processing liquid; a table disposed in the treatment tank and on which a workpiece is placed; The cavitation surface treatment nozzle according to any one of claims 1 to 4, a nozzle pipe to which the cavitation surface treatment nozzle can be attached, the nozzle pipe being movable in the front-back direction, the up-down direction, and the left-right direction relative to the table; A cavitation surface treatment device comprising:

9. the nozzle pipe has a nozzle chamber into which the cavitation surface treatment nozzle abuts and into which the cavitation surface treatment nozzle is inserted, The method further includes a nozzle cap disposed at the tip of the nozzle pipe and fastening the cavitation surface treatment nozzle to the nozzle pipe. The cavitation surface treatment device according to claim 8.

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