A kind of abrasive flow precision machining valve core nozzle equipment

Abstract

The invention provides an abrasive flow precision machining valve core nozzle device, which consists of an upper base plate, a forward circulation device, a reverse circulation device, a fixed plate, an upper support cylinder, a lower support cylinder, a left matching sleeve, a right matching sleeve, and a lower base plate, wherein: the forward circulation device consists of a forward upper flow channel tube, a forward positioning plate, a forward piston, a forward spring, a forward spring limit gasket, a forward spring adjusting screw, and a forward lower flow channel tube; the reverse circulation device consists of a reverse upper flow channel tube, a reverse positioning plate, a reverse piston, a reverse spring, a reverse spring limit gasket, a reverse spring adjusting screw, and a reverse lower flow channel tube; the forward circulation device and the reverse circulation device cooperate with each other, so that the abrasive flows from the upper end of the valve core nozzle into the lower end and flows out in both forward and reverse circulation, so that the sharp edge of the lower end of the valve core nozzle can be prevented from being damaged, and the machining efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive flow machining, in particular to an abrasive flow precision machining valve core nozzle device. Background Art

[0002] The size of valve core nozzle parts is generally small, and they require high dimensional accuracy and shape and position accuracy during use. The inner surface of the valve core nozzle requires high surface quality, that is, the surface roughness value needs to be small. Generally, traditional processing methods are difficult to achieve the use requirements of valve core nozzles. In addition, the surface quality of the small hole at the valve core nozzle will directly affect its working performance. When there are burrs, not smooth enough, or residual contaminants on the inner wall of the small hole of the valve core nozzle, it is easy to cause the valve core nozzle jet to scatter and spiral, affecting the working performance.

[0003] Abrasive flow machining is a new type of machining method that uses abrasive media to flow under pressure over the surface of the workpiece to be machined, remove burrs, remove flash, and round corners to reduce the waviness and roughness of the workpiece surface and achieve precision machining finish. Abrasive flow machining is the best choice for workpieces that require complex manual finishing or complex shapes, as well as parts that are difficult to machine with other methods. Summary of the invention

[0004] The invention provides an abrasive flow precision machining valve core nozzle device to reduce the waviness and roughness of the inner surface of a workpiece and achieve the finish of precision machining.

[0005] The invention provides an abrasive flow precision machining valve core nozzle device, which comprises an upper base plate, a forward flow device, a reverse flow device, a fixed disk, an upper support cylinder, a lower support cylinder, a left matching sleeve, a right matching sleeve and a lower base plate.

[0006] Further, as a preference, the forward circulation device is composed of a forward upper flow duct tube, a forward positioning disk, a forward piston, a forward spring, a forward spring limit gasket, a forward spring adjusting screw, and a forward lower flow duct tube, and the reverse circulation device is composed of a reverse upper flow duct tube, a reverse positioning disk, a reverse piston, a reverse spring, a reverse spring limit gasket, a reverse spring adjusting screw, and a reverse lower flow duct tube.

[0007] Further, as a preference, the upper bottom plate is provided with a forward upward flow hole and a reverse downward flow hole, the upper bottom plate edge portion is fixedly connected to an upper support cylinder, the forward upward flow hole edge portion is fixedly connected to a forward upward flow channel tube, the reverse downward flow hole edge portion is fixedly connected to a reverse downward flow channel tube, the forward upward flow hole is provided with a first forward flow channel, the reverse downward flow hole is provided with a fifth reverse flow channel, the forward upward flow channel tube inner hole is provided with a second forward flow channel, the reverse downward flow channel tube inner hole is provided with a fourth reverse flow channel; the reverse upward flow hole and the forward downward flow hole are provided on the lower bottom plate. The lower circulation hole, the edge of the lower base plate is fixedly connected with the lower support cylinder, the edge of the reverse upper circulation hole is fixedly connected with the reverse upper flow channel tube, the edge of the forward downward circulation hole is fixedly connected with the forward downward flow channel tube, the reverse upper circulation hole is provided with a first reverse flow channel, the forward downward circulation hole is provided with a fifth forward flow channel, the inner hole of the reverse upper flow channel tube is provided with a second reverse flow channel, and the inner hole of the forward downward flow channel tube is provided with a fourth forward flow channel; a left mating sleeve and a right mating sleeve are connected between the upper support cylinder and the lower support cylinder, and the left mating sleeve and the right mating sleeve are fixedly connected by screws.

[0008] Further, as a preference, the fixed plate is provided with a forward flow matching hole and a reverse flow matching hole, the upper edge portion of the forward flow matching hole is provided with a threaded hole, the lower outer end of the forward upper flow channel tube is provided with a countersunk hole, the countersunk hole at the lower outer end of the forward upper flow channel tube is cooperated with a screw to be installed at the threaded hole at the upper edge portion of the forward flow matching hole, the lower outer end of the forward flow matching hole is provided with a threaded hole, the upper outer end of the forward lower flow channel tube is provided with a countersunk hole, the upper outer end of the forward lower flow channel tube is cooperated with a screw to be installed at the threaded hole at the lower edge portion of the forward flow matching hole, the upper edge portion of the reverse flow matching hole is provided with a threaded hole, the lower outer end of the reverse upper flow channel tube is provided with a countersunk hole, the lower outer end of the reverse upper flow channel tube is cooperated with a screw to be installed at the threaded hole at the upper edge portion of the reverse flow matching hole, the lower end edge portion of the reverse flow matching hole is provided with a threaded hole, the upper outer end of the reverse lower flow channel tube is provided with a countersunk hole, the upper outer end of the reverse lower flow channel tube is cooperated with a screw to be installed at the threaded hole at the lower edge portion of the reverse flow matching hole.

[0009] Further, as a preference, the forward flow matching hole is composed of a forward first-section matching hole, a forward second-section matching hole, a forward third-section matching hole, and a forward fourth-section matching hole. The forward first-section matching hole, the forward second-section matching hole, the forward third-section matching hole, and the forward fourth-section matching hole are coaxial. The forward positioning disk is positioned and installed in the forward first-section matching hole. A forward valve core nozzle positioning hole is provided on the forward positioning disk. A valve core nozzle is positioned and installed in the forward valve core nozzle positioning hole. The forward piston is matched with the forward fourth-section matching hole and installed in the forward fourth-section matching hole. A forward spring matching hole is provided at the lower end of the forward piston. The forward spring is installed in the forward spring matching hole. The spring limiting gasket is installed in the forward fourth section matching hole, the upper end of the forward spring limiting gasket contacts the lower end of the forward spring, the lower end of the forward fourth section matching hole is provided with a thread, the forward spring adjusting screw is installed in the forward fourth section matching hole in threaded cooperation with the lower end of the forward fourth section matching hole, the upper end of the forward spring adjusting screw contacts the lower end of the forward spring limiting gasket, the outer surface of the forward piston is provided with a through hole, the inner surface of the valve core nozzle, the inner surface of the forward second section matching hole, the inner surface of the forward third section matching hole and the outer surface of the forward piston, the through hole on the outer surface of the forward piston, the inner surface of the forward spring matching hole, the inner surface of the positive spring limiting gasket and the inner surface of the positive spring adjusting screw are provided with a third positive flow channel.

[0010] Further, as a preference, the reverse circulation matching hole is composed of a reverse first-section matching hole, a reverse second-section matching hole, a reverse third-section matching hole, and a reverse fourth-section matching hole. The reverse first-section matching hole, the reverse second-section matching hole, the reverse third-section matching hole, and the reverse fourth-section matching hole are coaxial. The reverse positioning plate is positioned and installed in the reverse first-section matching hole. A reverse valve core nozzle positioning hole is provided on the reverse positioning plate. A valve core nozzle is positioned and installed in the reverse valve core nozzle positioning hole. The reverse piston is matched with the reverse fourth-section matching hole and installed in the reverse fourth-section matching hole. A reverse spring matching hole is provided at the lower end of the reverse piston. The reverse spring is installed in the reverse spring matching hole. The spring limiting gasket is installed in the reverse fourth section matching hole, the upper end of the reverse spring limiting gasket contacts the lower end of the reverse spring, the lower end of the reverse fourth section matching hole is provided with a thread, the reverse spring adjusting screw is installed in the reverse fourth section matching hole in threaded cooperation with the lower end of the reverse fourth section matching hole, the upper end of the reverse spring adjusting screw contacts the end of the reverse spring limiting gasket, the outer surface of the reverse piston is provided with a through hole, the inner surface of the valve core nozzle, the inner surface of the reverse second section matching hole, the inner surface of the reverse third section matching hole and the outer surface of the reverse piston, the through hole on the outer surface of the reverse piston, the inner surface of the reverse spring matching hole, the inner surface of the reverse spring limiting gasket and the inner surface of the reverse spring adjusting screw are provided with a third reverse flow channel.

[0011] Further, as a preference, the lower end face of the forward upward flow channel tube is provided with a forward valve core nozzle clamping hole, the forward valve core nozzle clamping hole is coaxial with the inner surface of the valve core nozzle, the diameter of the forward valve core nozzle clamping hole is larger than the inner surface diameter of the valve core nozzle, the diameter of the forward valve core nozzle clamping hole is smaller than the outer surface diameter of the valve core nozzle, the lower end face of the forward upward flow channel tube is in close contact with the upper end face of the valve core nozzle to clamp the valve core nozzle, and the lower end face of the reverse upward flow channel tube is provided with a reverse valve core nozzle clamping hole, the reverse valve core nozzle clamping hole is coaxial with the inner surface of the valve core nozzle, the diameter of the reverse valve core nozzle clamping hole is larger than the inner surface diameter of the valve core nozzle, the diameter of the reverse valve core nozzle clamping hole is smaller than the outer surface diameter of the valve core nozzle, and the lower end face of the reverse upward flow channel tube is in close contact with the upper end face of the valve core nozzle to clamp the valve core nozzle.

[0012] Further, as a preference, a threaded hole is provided at the upper end of the outer surface of the fixing plate, which is used to fix and clamp the forward positioning plate by cooperating with a top screw, and a threaded hole is provided at the lower end of the outer surface of the fixing plate, which is used to fix and clamp the reverse positioning plate by cooperating with a top screw.

[0013] Further, as a preference, the original compression length of the forward spring can be controlled by adjusting the forward spring adjusting screw, and the original compression length of the reverse spring can be controlled by adjusting the reverse spring adjusting screw.

[0014] Furthermore, preferably, the forward circulation device cooperates with the reverse circulation device so that the abrasive flows from the upper end of the valve core nozzle and flows out from the lower end during both forward and reverse circulation, thereby preventing the sharp edge of the lower end of the valve core nozzle from being damaged and achieving high processing efficiency.

[0015] Further, as a preference, a threaded hole is provided on the surface of the right mating sleeve, which is used to fix and clamp the fixing plate by cooperating with a top screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded view of the overall assembly of the valve core nozzle processing equipment;

[0017] Figure 2 An exploded view of the partial assembly of the valve core nozzle processing equipment;

[0018] Figure 3 It is a top view of the overall assembly of the valve core nozzle processing equipment;

[0019] Figure 4 for Figure 3 Middle AA section cutaway view;

[0020] Figure 5 This is a schematic diagram of the upward flow channel pipe;

[0021] Figure 6 It is a schematic diagram of the reverse downflow pipe;

[0022] Figure 7 It is a schematic diagram of the positive positioning disk;

[0023] Figure 8 It is a schematic diagram of the reverse positioning disk;

[0024] Fig. 9 It is a schematic diagram of a fixed disk;

[0025] Fig.10 It is a cross-sectional view of the fixed plate;

[0026] Fig.11 This is a schematic diagram of the downward flow channel pipe;

[0027] Fig.12 Schematic diagram of the reverse upflow pipe.

[0028] In the figure: 1, upper base plate, 1-1, reverse lower flow hole, 1-2, forward upper flow hole, 1-3, first forward flow channel, 1-4, fifth reverse flow channel, 2, upper support cylinder, 3, forward upper flow channel tube, 3-1, second forward flow channel, 3-2, forward valve core nozzle clamping hole, 4, reverse lower flow channel tube, 4-1, fourth reverse flow channel, 5, valve core nozzle, 6, forward positioning plate, 6-1, forward valve core nozzle positioning hole, 7, forward piston, 7 -1, forward spring matching hole, 7-2, forward piston outer surface through hole, 7-3, third forward flow channel, 8, reverse spring adjustment screw, 9, reverse spring limit gasket, 10, reverse piston, 10-1, reverse spring matching hole, 10-2, reverse piston outer surface through hole, 10-3, third reverse flow channel, 11, forward spring, 12, reverse spring, 13, reverse positioning plate, 13-1, reverse valve core nozzle positioning hole, 14, forward spring Spring limit washer, 15, forward spring adjustment screw, 16, fixed plate, 16-1, forward flow matching hole, 16-2, reverse flow matching hole, 16-3, forward first section matching hole, 16-4, forward second section matching hole, 16-5, forward third section matching hole, 16-6, forward fourth section matching hole, 16-7, reverse first section matching hole, 16-8, reverse second section matching hole, 16-9, reverse third section matching hole, 16 -10, reverse fourth section matching hole, 17, left matching sleeve, 18, right matching sleeve, 19, forward downward flow channel tube, 19-1, second reverse flow channel, 20, reverse upper flow channel tube, 20-1, fourth forward flow channel, 20-2, reverse valve core nozzle clamping hole, 21, lower support cylinder, 22, lower bottom plate, 22-1, reverse upper flow hole, 22-2, forward downward flow hole, 22-3, first reverse flow channel, 22-4, fifth forward flow channel. DETAILED DESCRIPTION

[0029] The present invention provides an abrasive flow precision machining valve core nozzle device. The technical scheme in the embodiments of the present invention is clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the protection scope of the present invention.

[0030] The present invention comprises an upper base plate (1), a forward circulation device, a reverse circulation device, a fixed plate (16), an upper support tube (2), a lower support tube (21), a left matching sleeve (17), a right matching sleeve (18), and a lower base plate (22). The forward circulation device comprises a forward upper flow channel tube (3), a forward positioning plate (6), a forward piston (7), a forward spring (11), a forward spring limiting gasket (14), a forward spring adjusting screw (15), and a forward lower flow channel tube (19); and the reverse circulation device comprises a reverse upper flow channel tube (20), a reverse positioning plate (13), a reverse piston (10), a reverse spring (12), a reverse spring limiting gasket (9), a reverse spring adjusting screw (8), and a reverse lower flow channel tube (4).

[0031] The upper base plate (1) is provided with a forward upward flow hole (1-2) and a reverse downward flow hole (1-1); the upper base plate is provided with a countersunk hole at the edge thereof and is fixedly connected to the corresponding threaded hole on the upper support tube (2) by means of screws; the forward upward flow hole (1-2) is provided with a countersunk hole at the edge thereof and is fixedly connected to the corresponding threaded hole on the forward upward flow channel tube (3) by means of screws; the reverse downward flow hole (1-1) is provided with a countersunk hole at the edge thereof and is fixedly connected to the reverse downward flow channel tube (4) by means of screws. On the corresponding threaded holes, the first forward flow channel (1-3) is arranged in the forward upward flow hole (1-2), the fifth reverse flow channel (1-4) is arranged in the reverse downward flow hole (1-1), the inner hole of the forward upward flow channel tube (3) is arranged with a second forward flow channel (3-1), and the inner hole of the reverse downward flow channel tube (4) is arranged with a fourth reverse flow channel (4-1); the reverse upward flow hole (22-1) and the forward downward flow hole (22-2) are arranged on the lower bottom plate (22), and the lower bottom plate The edge of the reverse upper flow hole (22) is provided with a countersunk hole, which is fixedly connected to the corresponding threaded hole on the lower support tube (21) by screws; the edge of the reverse upper flow hole (22-1) is provided with a countersunk hole, which is fixedly connected to the corresponding threaded hole on the reverse upper flow channel tube (20) by screws; the edge of the forward downward flow hole (22-2) is provided with a countersunk hole, which is fixedly connected to the corresponding threaded hole on the forward downward flow channel tube (19) by screws; the reverse upper flow hole (22-1) is provided with a first reverse flow hole. A fifth forward flow channel (22-4) is arranged in the forward downward flow hole (22-2), a second reverse flow channel (19-1) is arranged in the inner hole of the reverse upper flow channel tube (20), and a fourth forward flow channel (20-1) is arranged in the inner hole of the forward lower flow channel tube (19); a left matching sleeve (17) and a right matching sleeve (18) are connected between the upper support tube (2) and the lower support tube (21), and the left matching sleeve (17) and the right matching sleeve (18) are fixedly connected by screws.

[0032] The fixing plate (16) is provided with a forward flow matching hole (16-1) and a reverse flow matching hole (16-2); the upper edge of the forward flow matching hole (16-1) is provided with a threaded hole; the lower outer end of the forward upward flow channel tube (3) is provided with a countersunk hole; the lower outer end countersunk hole of the forward upward flow channel tube (3) is installed with a screw at the threaded hole at the upper edge of the forward flow matching hole (16-1); the lower outer end of the forward flow matching hole (16-1) is provided with a threaded hole; the upper outer end of the forward downward flow channel tube (19) is provided with a countersunk hole; the upper outer end countersunk hole of the forward downward flow channel tube (19) is installed with a screw at the threaded hole at the upper edge of the forward flow matching hole (16-1); The reverse circulation matching hole (16-2) is provided with a threaded hole at the lower edge of the through-fitting hole (16-1), and a threaded hole is provided at the upper edge of the reverse circulation matching hole (16-2). The reverse upper flow channel tube (20) is provided with a countersunk hole at the lower end of the outer side. The countersunk hole at the lower end of the outer side of the reverse upper flow channel tube (20) is installed in cooperation with a screw at the threaded hole at the upper edge of the reverse circulation matching hole (16-2). The reverse circulation matching hole (16-2) is provided with a threaded hole at the lower edge of the outer side. The reverse lower flow channel tube (4) is provided with a countersunk hole at the upper end of the outer side. The countersunk hole at the upper end of the outer side of the reverse lower flow channel tube (4) is installed in cooperation with a screw at the threaded hole at the lower edge of the reverse circulation matching hole (16-2).

[0033] The forward flow matching hole (16-1) is composed of a forward first section matching hole (16-3), a forward second section matching hole (16-4), a forward third section matching hole (16-5), and a forward fourth section matching hole (16-6); the forward first section matching hole (16-3) and the forward second section matching hole (16-4) and the forward third section matching hole (16-5) and the forward fourth section matching hole (16-6) are coaxial; the forward first section matching hole (16-3) is a positioning hole of a forward positioning plate (6); the forward positioning plate (6) is positioned and installed in the first forward section matching hole (16-3), the forward positioning plate (6) is provided with a forward valve core nozzle positioning hole (6-1), which is used to position the valve core nozzle (5), the valve core nozzle (5) is positioned and installed in the forward valve core nozzle positioning hole (6-1), the forward piston (7) and the forward fourth section matching hole (16-6) are matched and installed in the forward fourth section matching hole (16-6), the lower end of the forward piston (7) is provided with a forward spring matching hole (7-1), the forward spring (11) is arranged The positive spring is installed in the positive spring matching hole (7-1), the positive spring limiting gasket (14) is installed in the positive fourth section matching hole (16-6), the upper end of the positive spring limiting gasket (14) contacts the lower end of the positive spring (11), the lower end of the positive fourth section matching hole (16-6) is provided with a thread, the positive spring adjusting screw (15) is installed in the positive fourth section matching hole (16-6) by threading with the lower end of the positive fourth section matching hole (16-6), the upper end of the positive spring adjusting screw (15) is in contact with the positive spring The lower end of the limiting gasket (14) is in contact with the positive piston (7), the outer surface of the positive piston (7) is provided with a positive piston outer surface through hole (7-2), the inner surface of the valve core nozzle (5), the inner surface of the positive second section matching hole (16-4), the inner surface of the positive third section matching hole (16-5) and the outer surface of the positive piston (7), the positive piston outer surface through hole (7-2), the inner surface of the positive spring matching hole (7-1), the inner surface of the positive spring limiting gasket (14), and the inner surface of the positive spring adjusting screw (15) are provided with a third positive flow channel (7-3).

[0034] The reverse flow matching hole (16-2) is composed of a reverse first section matching hole (16-7), a reverse second section matching hole (16-8), a reverse third section matching hole (16-9), and a reverse fourth section matching hole (16-10); the reverse first section matching hole (16-7) and the reverse second section matching hole (16-8) and the reverse third section matching hole (16-9) and the reverse fourth section matching hole (16-10) are coaxial; the reverse first section matching hole (16-7) is a positioning hole of a reverse positioning plate (13); the reverse positioning plate (13) is a positioning hole of a reverse positioning plate (13); the reverse first section matching hole (16-7) is a positioning hole of a reverse positioning plate (13); the reverse positioning plate (13) is a positioning hole of a reverse positioning plate (13); the reverse first section matching hole (16-8) and the reverse third section matching hole (16-9) and the reverse fourth section matching hole (16-10) are coaxial; the reverse first section matching hole (16-7) is a positioning hole of a reverse positioning plate (13); the reverse positioning plate (13) is a positioning hole of a reverse positioning plate (13); the reverse first section matching hole (16-7) and the reverse second ... third section matching hole The reverse piston (10) is mounted in the reverse first section matching hole (16-7), the reverse positioning plate (13) is provided with a reverse valve core nozzle positioning hole (13-1), which is used to position the valve core nozzle (5), the valve core nozzle (5) is positioned and installed in the reverse valve core nozzle positioning hole (13-1), the reverse piston (10) and the reverse fourth section matching hole (16-10) are matched and installed in the reverse fourth section matching hole (16-10), the lower end of the reverse piston (10) is provided with a reverse spring matching hole (10-1), the reverse spring ( The reverse spring (12) is installed in the reverse spring matching hole (10-1), the reverse spring limiting gasket (9) is matched and installed in the reverse fourth section matching hole (16-10), the upper end of the reverse spring limiting gasket (9) contacts the lower end of the reverse spring (12), the lower end of the reverse fourth section matching hole (16-10) is provided with a thread, the reverse spring adjusting screw (8) is matched and installed in the reverse fourth section matching hole (16-10) by threading with the lower end of the reverse fourth section matching hole (16-10), the upper end of the reverse spring adjusting screw (8) contacts the reverse spring (12) The reverse piston (10) is in contact with the lower end of the spring limiting gasket (9), the outer surface of the reverse piston (10) is provided with a reverse piston outer surface through hole (10-2), the inner surface of the valve core nozzle (5), the inner surface of the reverse second section matching hole (16-8), the inner surface of the reverse third section matching hole (16-9) and the outer surface of the reverse piston (10), the reverse piston outer surface through hole (10-2), the inner surface of the reverse spring matching hole (10-1), the inner surface of the reverse spring limiting gasket (9), and the inner surface of the reverse spring adjusting screw (8) are provided with a third reverse flow channel (10-3).

[0035] The lower end surface of the forward upward flow channel tube (3) is provided with a forward valve core nozzle clamping hole (3-2), the forward valve core nozzle clamping hole (3-2) is coaxial with the inner surface of the valve core nozzle (5), the diameter of the forward valve core nozzle clamping hole (3-2) is larger than the inner surface diameter of the valve core nozzle (5), the diameter of the forward valve core nozzle clamping hole (3-2) is smaller than the outer surface diameter of the valve core nozzle (5), the lower end surface of the forward upward flow channel tube (3) is in close contact with the upper end surface of the valve core nozzle (5), clamping the valve core nozzle (5), the reverse The lower end surface of the upward flow channel tube (20) is provided with a reverse valve core nozzle clamping hole (20-2), the reverse valve core nozzle clamping hole (20-2) is coaxial with the inner surface of the valve core nozzle (5), the diameter of the reverse valve core nozzle clamping hole (20-2) is larger than the inner surface diameter of the valve core nozzle (5), the diameter of the reverse valve core nozzle clamping hole (20-2) is smaller than the outer surface diameter of the valve core nozzle (5), the lower end surface of the reverse upward flow channel tube (20) is in close contact with the upper end surface of the valve core nozzle (5), and the valve core nozzle (5) is clamped.

[0036] In a preferred embodiment, a threaded hole is provided on the upper end of the outer surface of the fixing plate (16), and the forward positioning plate (6) is fixedly clamped by cooperating with a top screw to ensure that the forward positioning plate (6) does not rotate during the processing, thereby ensuring the processing accuracy. A threaded hole is provided on the lower end of the outer surface of the fixing plate (16), and the reverse positioning plate (13) is fixedly clamped by cooperating with a top screw to ensure that the reverse positioning plate (13) does not rotate during the processing, thereby ensuring the processing accuracy.

[0037] In a preferred embodiment, the original compression length of the forward spring (11) can be controlled by adjusting the forward spring adjusting screw (15), and the original compression length of the reverse spring (12) can be controlled by adjusting the reverse spring adjusting screw (8).

[0038] In a preferred embodiment, the forward circulation device and the reverse circulation device cooperate with each other so that the abrasive flows from the upper end of the valve core nozzle (5) and flows out from the lower end during both forward and reverse circulation, thereby preventing the sharp edge of the lower end of the valve core nozzle (5) from being damaged and achieving high processing efficiency.

[0039] In a preferred embodiment, the surface of the right matching sleeve (18) is provided with a threaded hole, which is used to fix and clamp the fixing plate (16) by cooperating with a top screw.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An abrasive flow precision machining valve core nozzle device, characterized by: The device includes an upper base plate, a forward circulation device, a reverse circulation device, a fixed plate, an upper support cylinder, a lower support cylinder, a left matching sleeve, a right matching sleeve, and a lower base plate. The forward circulation device is composed of a forward upward flow channel tube, a forward positioning plate, a forward piston, a forward spring, a forward spring limiting gasket, a forward spring adjusting screw, and a forward downward flow channel tube. The reverse circulation device is composed of a reverse upper flow channel tube, a reverse positioning plate, a reverse piston, a reverse spring, a reverse spring limiting gasket, a reverse spring adjusting screw, and a reverse downward flow channel tube. A forward upward circulation hole and a reverse downward circulation hole are arranged on the upper base plate. The upper support cylinder is fixedly connected to the edge of the upper base plate. The forward upward circulation hole is fixedly connected to the forward upward flow channel tube at the edge. The reverse downward circulation hole is fixedly connected to the reverse downward flow channel tube at the edge. A first forward upward circulation hole is arranged in the forward upward circulation hole. flow channel, a fifth reverse flow channel is arranged in the reverse lower flow hole, a second forward flow channel is arranged in the inner hole of the forward upper flow channel tube, and a fourth reverse flow channel is arranged in the inner hole of the reverse lower flow channel tube; a reverse upper flow hole and a forward downward flow hole are arranged on the lower base plate, the edge of the lower base plate is fixedly connected with a lower support tube, the edge of the reverse upper flow hole is fixedly connected with a reverse upper flow channel tube, the edge of the forward downward flow hole is fixedly connected with a forward downward flow channel tube, a first reverse flow channel is arranged in the reverse upper flow hole, a fifth forward flow channel is arranged in the forward downward flow hole, a second reverse flow channel is arranged in the inner hole of the reverse upper flow channel tube, and a fourth forward flow channel is arranged in the inner hole of the forward downward flow channel tube; a left mating sleeve and a right mating sleeve are connected between the upper support sleeve and the lower support sleeve, and the left mating sleeve and the right mating sleeve are fixedly connected by screws.

2. The abrasive flow precision machining valve core nozzle device according to claim 1, characterized in that: The fixing plate is provided with a forward circulation matching hole and a reverse circulation matching hole, the upper edge portion of the forward circulation matching hole is provided with a threaded hole, the lower end of the outer side of the forward upward flow channel tube is provided with a countersunk hole, the lower end countersunk hole at the outer side of the forward upward flow channel tube is cooperated with a screw to be installed at the threaded hole at the upper edge portion of the forward circulation matching hole, the lower end edge portion of the forward circulation matching hole is provided with a threaded hole, the upper end of the outer side of the forward downward flow channel tube is provided with a countersunk hole, the upper end countersunk hole at the outer side of the forward downward flow channel tube is cooperated with a screw to be installed at the threaded hole at the lower edge portion of the forward circulation matching hole, the upper end edge portion of the reverse circulation matching hole is provided with a threaded hole, the lower end of the outer side of the reverse upper flow channel tube is provided with a countersunk hole, the lower end countersunk hole at the outer side of the reverse upper flow channel tube is cooperated with a screw to be installed at the threaded hole at the upper edge portion of the reverse circulation matching hole, the lower end edge portion of the reverse circulation matching hole is provided with a threaded hole, the upper end of the outer side of the reverse downward flow channel tube is provided with a countersunk hole, the upper end countersunk hole at the outer side of the reverse downward flow channel tube is cooperated with a screw to be installed at the threaded hole at the lower edge portion of the reverse circulation matching hole;The forward flow matching hole is composed of a forward first-section matching hole, a forward second-section matching hole, a forward third-section matching hole, and a forward fourth-section matching hole. The forward first-section matching hole, the forward second-section matching hole, the forward third-section matching hole, and the forward fourth-section matching hole are coaxial. The forward positioning plate is positioned and installed in the forward first-section matching hole. A forward valve core nozzle positioning hole is provided on the forward positioning plate. A valve core nozzle is positioned and installed in the forward valve core nozzle positioning hole. The forward piston is matched with the forward fourth-section matching hole and installed in the forward fourth-section matching hole. A forward spring matching hole is provided at the lower end of the forward piston. The forward spring is installed in the forward spring matching hole. The forward spring limit gasket is matched and installed. Installed in the fourth-stage forward matching hole, the upper end of the forward spring limiting gasket contacts the lower end of the forward spring, the lower end of the fourth-stage forward matching hole is provided with a thread, the forward spring adjusting screw is threadedly matched with the lower end of the fourth-stage forward matching hole and installed in the fourth-stage forward matching hole, the upper end of the forward spring adjusting screw contacts the lower end of the forward spring limiting gasket, the outer surface of the forward piston is provided with a forward piston outer surface through hole, the inner surface of the valve core nozzle, the inner surface of the second-stage forward matching hole, the inner surface of the third-stage forward matching hole, the outer surface of the forward piston, the outer surface through hole of the forward piston, the inner surface of the forward spring matching hole, the inner surface of the forward spring limiting gasket, and the inner surface of the forward spring adjusting screw are provided with a third forward flow channel, The reverse circulation matching hole is composed of a reverse first-section matching hole, a reverse second-section matching hole, a reverse third-section matching hole, and a reverse fourth-section matching hole. The reverse first-section matching hole, the reverse second-section matching hole, the reverse third-section matching hole, and the reverse fourth-section matching hole are coaxial. The reverse positioning plate is positioned and installed in the reverse first-section matching hole. A reverse valve core nozzle positioning hole is provided on the reverse positioning plate. A valve core nozzle is positioned and installed in the reverse valve core nozzle positioning hole. The reverse piston is matched with the reverse fourth-section matching hole and installed in the reverse fourth-section matching hole. A reverse spring matching hole is provided at the lower end of the reverse piston. The reverse spring is installed in the reverse spring matching hole. The reverse spring limit gasket is matched and installed Installed in the reverse fourth section matching hole, the upper end of the reverse spring limit washer contacts the lower end of the reverse spring, the lower end of the reverse fourth section matching hole is provided with a thread, the reverse spring adjustment screw is threadedly matched with the lower end of the reverse fourth section matching hole and installed in the reverse fourth section matching hole, the upper end of the reverse spring adjustment screw contacts the lower end of the reverse spring limit washer, the outer surface of the reverse piston is provided with a reverse piston outer surface through hole, the inner surface of the valve core nozzle, the inner surface of the reverse second section matching hole, the inner surface of the reverse third section matching hole, the outer surface of the reverse piston, the outer surface through hole of the reverse piston, the inner surface of the reverse spring matching hole, the inner surface of the reverse spring limit washer, and the inner surface of the reverse spring adjustment screw are provided with a third reverse flow channel. ; 3. The abrasive flow precision machining valve core nozzle device according to claim 2, characterized in that: The lower end face of the forward upward flow channel tube is provided with a forward valve core nozzle clamping hole, the forward valve core nozzle clamping hole is coaxial with the inner surface of the valve core nozzle, the diameter of the forward valve core nozzle clamping hole is larger than the inner surface diameter of the valve core nozzle, the diameter of the forward valve core nozzle clamping hole is smaller than the outer surface diameter of the valve core nozzle, the lower end face of the forward upward flow channel tube is in close contact with the upper end face of the valve core nozzle to clamp the valve core nozzle, and the lower end face of the reverse upward flow channel tube is provided with a reverse valve core nozzle clamping hole, the reverse valve core nozzle clamping hole is coaxial with the inner surface of the valve core nozzle, the diameter of the reverse valve core nozzle clamping hole is larger than the inner surface diameter of the valve core nozzle, the diameter of the reverse valve core nozzle clamping hole is smaller than the outer surface diameter of the valve core nozzle, the lower end face of the reverse upward flow channel tube is in close contact with the upper end face of the valve core nozzle to clamp the valve core nozzle.

4. The abrasive flow precision machining valve core nozzle device according to claim 2, characterized in that: The upper end of the outer surface of the fixing plate is provided with a threaded hole, which is used to fix and clamp the forward positioning plate by cooperating with the top screw. The lower end of the outer surface of the fixing plate is provided with a threaded hole, which is used to fix and clamp the reverse positioning plate by cooperating with the top screw.

5. The abrasive flow precision machining valve core nozzle device according to claim 1, characterized in that: The original compression length of the forward spring can be controlled by adjusting the forward spring adjusting screw, and the original compression length of the reverse spring can be controlled by adjusting the reverse spring adjusting screw.

6. The abrasive flow precision machining valve core nozzle device according to claim 1, characterized in that: The forward circulation device cooperates with the reverse circulation device so that the abrasive flows in from the upper end of the valve core nozzle and out from the lower end during forward and reverse circulation, thereby preventing the sharp edge of the lower end of the valve core nozzle from being damaged and achieving high processing efficiency.

7. The abrasive flow precision machining valve core nozzle device according to claim 1, characterized in that: The surface of the right matching sleeve is provided with a threaded hole, which is matched with a top screw to fix and clamp the fixing plate.

Images