JP5773842B2 - Spray gun for liquid honing - Google Patents

Description

  The present invention relates to an injection gun for liquid honing, and more particularly to an injection gun for liquid honing that can spray a slurry in a wide linear shape toward the surface of a workpiece and perform uniform processing over a wide width. .

  Liquid honing, in which slurry, which is a mixture of abrasive and water, is sprayed toward the surface of the workpiece, is widely used for deburring various printed circuit boards, surface processing of metal parts, etc. The technique of injecting slurry onto the surface is attracting a great deal of attention as it can efficiently process a planar workpiece.

Japanese Patent No. 3315672

None

  In order to inject slurry into a wide straight line, a dedicated injection gun is required, and several types have been proposed in the past. However, it is technically difficult to spray the slurry uniformly in a wide straight line, and the width that can spray the slurry uniformly is about 90 mm. I didn't find it. The present inventor has succeeded in developing a new injection gun capable of injecting slurry uniformly with a wider width, and proposes the present invention as the present invention.

  In the interior space of the injection gun base, which is a hollow, horizontally long rectangular parallelepiped shape composed of a pair of left and right wall bodies, a pair of front and rear wall bodies, and a pair of upper and lower wall bodies, a horizontal partition wall that is substantially evenly spaced is directed in the longitudinal direction. And provided with a vertical partition wall extending in the longitudinal direction between the upper surface of the horizontal partition wall and the lower surface of the upper wall body so as to divide the front and rear sides substantially evenly. Is the first slurry chamber, the other is the first air chamber, and a plurality of slurry inlets are provided in the upper wall body directly above the first slurry chamber, and a plurality of air inlets are provided in the upper wall body immediately above the first air chamber. In addition, a slurry chamber side lower vertical partition wall having a reverse L-shaped cross-section is formed in the lower space so that a slurry passage gap is formed in the lower portion, and an air passage gap is formed in the upper portion. An air chamber side lower vertical partition wall having an inverted L shape is provided symmetrically about the center line, and the lower space immediately below the first slurry chamber is the second slurry chamber, and the lower space immediately below the first air chamber is the second. Two air chambers are provided, each having a first slurry chamber, a second slurry chamber, and a horizontal partition that separates the first air chamber and the second air chamber. A plurality of small diameter air nozzles for injecting high-pressure air are arranged in a row, and an air nozzle block body having a long box shape in which projecting pieces are integrally provided on the front and rear sides is arranged above and below the axis of the air nozzle and the vertical partition wall. The lower vertical partition wall on the slurry chamber side and the lower side on the air chamber side so that the direction center line matches. A space that is fixed downward between the vertical partition walls and surrounded by the air nozzle block body, the slurry chamber side lower vertical partition wall, and the air chamber side lower vertical partition wall is used as a mixing chamber, and further, the lower wall body directly below the mixing chamber A flat nozzle having a tapered flat nozzle connection hole with an open top, a flat rectangular parallelepiped shape, and a wide slurry passage slit formed in the center of the thickness direction is formed into a slit for passing the slurry. Is fixed to the lower surface of the lower wall body so as to communicate with the flat nozzle connection slot.

  Slurry is supplied from the slurry intake port of the injection gun base and high-pressure air is supplied from the air intake port. The slurry is accelerated by the high-pressure air injected from the air nozzle, and injected from the flat nozzle toward the workpiece as a flat jet. However, the slurry is once introduced into the first slurry chamber and then sent to the second slurry chamber through the slurry passage hole to be uniformized and leveled. Even if the spray gun base is elongated, partial unevenness in the supply amount and concentration of the slurry will not occur. Similarly, the high-pressure air is once introduced into the first air chamber and then sent to the second air chamber through the air passage hole, so that the supply amount and pressure are equalized and leveled, and the partial pressure is not reduced. Uniformity will not occur.

  Therefore, the slurry and high-pressure air are uniformly supplied to each part of the flat nozzle, and uniform processing can be performed with a wider width than the conventional one. Incidentally, in the conventional one, the processing width is limited to about 90 mm, but the liquid honing spray gun according to the present invention can perform uniform processing with a width of 300 mm.

The front view of Example 1 of the injection gun for liquid honing which concerns on this invention. Similarly, the plan view. Similarly, the bottom view. The side view. The arrow AA line expanded sectional view in FIG. FIG. 3 is a cross-sectional view taken along line BB in FIG. 2. FIG. 3 is a cross-sectional view taken along line GG in FIG. 2. FIG. 2 is a cross-sectional view taken along line FF in FIG. 1. FIG. 2 is a cross-sectional view taken along line EE in FIG. 1. FIG. 2 is a cross-sectional view taken along line DD in FIG. 1. FIG. 2 is a cross-sectional view taken along line HH in FIG. 1. FIG. 3 is an enlarged partial perspective view of a part of an air nozzle block body that is one of the constituent elements of the liquid honing spray gun according to the present invention.

  Uniform concentration, pressure, and supply amount by moving slurry and high pressure gas to each chamber sequentially, with two slurry chambers and two air chambers that temporarily store slurry and high pressure air formed at the base of the spray gun. The greatest feature lies in the point that it is made uniform and leveled.

  In the figure, reference numeral 1 denotes an injection gun base, which comprises a pair of left and right wall bodies 2, 3, a pair of front and rear wall bodies 4, 5, and a pair of upper and lower wall bodies 6, 7, as shown in FIGS. It is hollow and has a horizontally long rectangular parallelepiped shape. In the inner space of the spray gun base 1, a horizontal partition wall 8 that is substantially evenly spaced is provided in the longitudinal direction, and is divided into an upper space 9 and a lower space 10.

  Further, a vertical partition wall 11 is provided in the longitudinal direction between the upper surface of the horizontal partition wall 8 and the lower surface of the upper wall body 6 so as to be substantially evenly spaced in the front-rear direction. The other is a first air chamber 13, a plurality of slurry inlets 14 are provided in the upper wall body 6 immediately above the first slurry chamber 12, and a plurality of air are provided in the upper wall body 6 immediately above the first air chamber 13. The intakes 15 are provided at equal intervals. Further, as shown in FIG. 5, the slurry chamber side lower vertical partition wall 17 having an inverted L-shaped cross section and the air chamber side lower vertical partition wall 19 having an inverted L shape in cross section are formed above and below the vertical partition wall 11. It is installed in the lower space 10 so that a slurry passage gap 16 is formed in the lower part and an air passage gap 18 is formed in the upper part and symmetrically about the direction center line 28, and directly below the first slurry chamber 12. The lower space is a second slurry chamber 21, and the lower space immediately below the first air chamber 13 is a second air chamber 22. The left and right walls 2 and 3 of the second slurry chamber 21 are provided with bypass ports 37 for discharging the slurry to the outside, as described below.

  Further, as shown in FIG. 8, the horizontal partition wall 8 separating the first slurry chamber 12 and the second slurry chamber 21 has a long hole-like slurry passage hole 23 penetrating the front and back surfaces, and the first air chamber 13. The horizontal partition wall 8 separating the second air chamber 22 is also formed with a long hole-like air passage hole 24 penetrating the front and back surfaces thereof. The opening area of the slurry passage hole 23 is set to be smaller than the total opening area of the slurry inlets 14. Similarly, the opening area of the air passage hole 24 is also the sum of the air inlets 15. It is set to be smaller than the opening area.

  On the other hand, reference numeral 25 denotes an air nozzle block body. As shown in FIG. 12, a large number of small diameter air nozzles 26 for injecting high-pressure air are arranged in a row at the tip, and fixed protruding pieces 27 are integrally provided on the front and rear. It is in the shape of a long box, and between the slurry chamber side lower vertical partition wall 17 and the air chamber side lower vertical partition wall 19 so that the axis of the air nozzle 26 and the vertical center line 28 of the vertical partition wall 11 coincide. In addition, the space surrounded by the air nozzle block 25, the slurry chamber side lower vertical partition wall 17 and the air chamber side lower vertical partition wall 19 is fixed so that the projecting piece 27 is sandwiched therebetween. It becomes the mixing chamber 31 in which and are mixed.

Further, a tapered flat nozzle connecting long hole 29 having an open top is formed in the lower wall body 7 immediately below the air nozzle 26.
Reference numeral 30 denotes a flat nozzle, which is a pair of nozzle bodies 36 each having a rectangular shape having a nozzle groove 32 in the central portion thereof, the side edges of which are sandwiched by the sandwiching material 23 and joined in a facing state. A wide slurry passage slit 34 is formed in the center in the thickness direction, and a fixing tool is provided on the lower surface of the lower wall body 7 so that the slurry passage slit 34 and the flat nozzle connection long hole 29 communicate with each other. 35 is fixed. The opening area of the opening end of the flat nozzle connection long hole 29 is set to be smaller than the total opening area of the slurry passage hole 23 and the air passage hole 24.

This embodiment has the above-described configuration. The slurry is supplied from the slurry intake port 14 of the injection gun base 1 and the high pressure air is supplied from the air intake port 15, and the high pressure air injected from the air nozzle 26 is used. The slurry is accelerated and sprayed from the flat nozzle 30 toward the workpiece as a flat jet to perform processing such as deburring. After the slurry is once introduced into the first slurry chamber 12, Since it is sent to the second slurry chamber 21 through the slurry passage hole 23 to be uniformized and leveled, even if the spray gun base 1 is long, the concentration and supply amount of the slurry are partially uneven. Will not occur. Similarly, since the high pressure air is once introduced into the first air chamber 13 and then sent to the second air chamber 22 through the air passage hole 24, the pressure and supply amount are equalized and leveled. No uneven pressure will occur.
In addition, bypass ports 37 are formed in the left and right walls 2 and 3 of the second slurry chamber 21, and a part of the slurry sent to the second slurry chamber 21 is discharged from the bypass port 37 to the outside. Thus, fluidization of the slurry in the second slurry chamber 21 is promoted, the slurry is made more uniform, and intermittent supply of the slurry due to the resistance of air pressure does not occur. Further, the opening area of the slurry passage hole 23 is set to be smaller than the total opening area of the slurry intake holes 14, and the opening area of the air passage hole 24 is set to be smaller than the total opening area of the air intake ports 15. Since the opening area of the opening end of the flat nozzle connection long hole 29 is set to be smaller than the total opening area of the slurry passage hole 23 and the air passage hole 24, the orifice effect is generated by these, and the slurry is made more uniform. Is planned.

  Accordingly, the slurry and the high-pressure air are smoothly and uniformly supplied to each part of the slit 34 for passing the slurry of the flat nozzle 30, and uniform processing can be performed with a wider width than the conventional one. Incidentally, in the conventional one, the processing width is limited to about 90 mm, but the liquid honing spray gun according to the present invention can perform uniform processing with a width of 300 mm.

  It can be widely used for honing of general parts that require uniform processing over a wide range.

1. Spray gun base Left wall body Right wall 4. 4. Front wall body Rear wall body 6. Upper wall 7. Lower wall body 8. Horizontal bulkhead 9. Upper space 10. Lower space 11. Vertical partition 12. First slurry chamber 13. First air chamber 14. Slurry inlet 15. Air intake port 16. 16. Slurry passage gap Slurry chamber side lower vertical partition 18. Air passage clearance 19. Air chamber side lower vertical partition 21. Second slurry chamber 22. Second air chamber 23. Slurry passage hole 24. Air passage hole 25. Air nozzle block body 26. Air nozzle 27. Overhang piece 28. Vertical center line 29. Flat nozzle connection slot 30. Flat nozzle 31. Mixing chamber 32. Nozzle groove 33. Sandwiching material 34. Slurry passage slit 35. Fixture 36. Nozzle body 37. Bypass port

Claims (5)

  In the interior space of the injection gun base, which is a hollow, horizontally long rectangular parallelepiped shape composed of a pair of left and right wall bodies, a pair of front and rear wall bodies, and a pair of upper and lower wall bodies, a horizontal partition wall that is spaced evenly from top to bottom is directed in the longitudinal direction. And provided with a vertical partition wall extending in the longitudinal direction between the upper surface of the horizontal partition wall and the lower surface of the upper wall body so as to divide the front and rear sides substantially evenly. Is the first slurry chamber, the other is the first air chamber, and a plurality of slurry inlets are provided in the upper wall body directly above the first slurry chamber, and a plurality of air inlets are provided in the upper wall body immediately above the first air chamber. In addition, a slurry chamber side lower vertical partition wall having a reverse L-shaped cross-section is formed in the lower space so that a slurry passage gap is formed in the lower portion, and an air passage gap is formed in the upper portion. An air chamber side lower vertical partition wall having an inverted L shape is provided symmetrically about the center line, and the lower space immediately below the first slurry chamber is the second slurry chamber, and the lower space immediately below the first air chamber is the second. Two air chambers are provided, each having a first slurry chamber, a second slurry chamber, and a horizontal partition that separates the first air chamber and the second air chamber. A plurality of small diameter air nozzles for injecting high-pressure air are arranged in a row, and an air nozzle block body having a long box shape in which projecting pieces are integrally provided on the front and rear sides is arranged above and below the axis of the air nozzle and the vertical partition wall. The lower vertical partition wall on the slurry chamber side and the lower side on the air chamber side so that the direction center line matches. A space that is fixed downward between the vertical partition walls and surrounded by the air nozzle block body, the slurry chamber side lower vertical partition wall, and the air chamber side lower vertical partition wall is used as a mixing chamber, and further, the lower wall body directly below the mixing chamber A flat nozzle having a tapered flat nozzle connection hole with an open top, a flat rectangular parallelepiped shape, and a wide slurry passage slit formed in the center of the thickness direction is formed into a slit for passing the slurry. Is fixed to the lower surface of the lower wall body so as to communicate with the flat nozzle connection elongated hole.   2. The liquid honing spray gun according to claim 1, wherein a bypass port for discharging the slurry to the outside is formed on the left and right wall bodies of the second slurry chamber.   2. The liquid honing spray gun according to claim 1, wherein an opening area of the slurry passage hole is set to be smaller than a total opening area of the slurry intake port.   The liquid honing spray gun according to claim 1, wherein an opening area of the air passage hole is set to be smaller than a total opening area of the air intake ports.   2. The liquid honing spray gun according to claim 1, wherein an opening area of an opening end of the flat nozzle connection long hole is set to be smaller than a total opening area of the slurry passage hole 23 and the air passage hole.

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