An injector seat, a method for efficiently manufacturing the injector seat, and a hydraulic fixture

Abstract

The present invention relates to the technical field of fuel injector seats, and discloses a fuel injector seat, a method for efficiently manufacturing the fuel injector seat, and a hydraulic fixture. The fuel injector seat includes a fuel injector seat main body and a fuel injector seat branch integrally formed with the fuel injector seat main body. The fuel injector seat main body is respectively provided with an upper surface, a curved surface, a cylindrical surface, and a lower surface. The fuel injector seat branch is provided with a circular through hole. The lower surface is provided with a first circular counterbore, the curved surface is provided with a second circular counterbore, the cylindrical surface is provided with a keyway, and several circular small holes are provided at the lower end of the cylindrical surface; the dimensional accuracy of the keyway and the connection hole on the fuel injector seat main body is high, which is easy to assemble and has no risk of oil leakage; on a four-axis machine tool, a special hydraulic fixture is used to realize the one-time continuous processing of the dimensions of the keyway and the second circular counterbore on the fuel injector seat main body, improving the production efficiency and reducing the equipment requirements; the number of production stations can be increased to realize the processing of multiple workpieces at one time, further improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel injector seats, and specifically to a fuel injector seat, a method for efficiently manufacturing the fuel injector seat, and a hydraulic fixture. Background Art

[0002] The fuel injector seat is one of the important components connecting the fuel rail of an automobile engine. It is usually produced by a combination of forging and machining. Among them, machining is to ensure the dimensional accuracy requirements of the key parts of the product, making it easy to assemble and having no risk of oil leakage. The keyway and connection hole parts of the fuel injector seat are the key parts that require precision machining. However, since these two parts are on different planes and have different angles, if the machining accuracy needs to be ensured, it usually needs to be machined in one go on a five-axis machine tool, resulting in too large equipment investment. In the prior art, a conventional three-axis machine tool is generally used to perform four-station machining in two processes. The fuel injector seats manufactured by such a method are difficult to ensure dimensional accuracy and have low production efficiency. For this reason, a fuel injector seat, a method for efficiently manufacturing the fuel injector seat, and a hydraulic fixture are proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a fuel injector seat, a method for efficiently manufacturing the fuel injector seat, and a hydraulic fixture to solve the problem that in the prior art, a conventional three-axis machine tool is generally used to perform four-station machining in two processes, and the fuel injector seats manufactured by such a method are difficult to ensure dimensional accuracy and have low production efficiency as mentioned in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A fuel injector seat includes a fuel injector seat main body and a fuel injector seat branch integrally formed with the fuel injector seat main body. The fuel injector seat main body is respectively provided with an upper surface, a curved surface, a cylindrical surface, and a lower surface. A circular through hole is provided on the fuel injector seat branch. A first circular counterbore is provided on the lower surface. A second circular counterbore is provided on the curved surface. A keyway is provided on the cylindrical surface. A plurality of circular small holes are provided at the lower end of the cylindrical surface.

[0005] As a further preference of this technical solution: The fuel injector seat branch is respectively provided with a top side surface and a bottom side surface, and one end of the fuel injector seat branch is provided with a connecting surface connecting the top side surface and the bottom side surface.

[0006] As a further preference of this technical solution: The curved surface is adjacent to the upper surface, the cylindrical surface is adjacent to the curved surface, and the lower surface is adjacent to the cylindrical surface.

[0007] As a further preference of this technical solution: The center line of the circular through hole is parallel to the first circular counterbore. The center line of the second circular counterbore forms an included angle with the X-axis, Y-axis, and Z-axis in three directions. The dimensional accuracy of the keyway is ±0.05 mm, and the accuracy of the included angle is ±0.5°.

[0008] A hydraulic fixture for an injector seat, comprising a bottom plate, with a first heightening block and a second heightening block fixedly connected to both ends of the bottom plate respectively. A four-axis tailstock is installed on the top of the first heightening block, and a tailstock connection plate is installed on one side of the four-axis tailstock. A four-axis rotary head is installed on the top of the second heightening block, and a four-axis head connection plate is installed on the side of the four-axis rotary head opposite to the tailstock connection plate. A bridge plate is installed between the tailstock connection plate and the four-axis head connection plate. A plurality of rotary cylinders are provided on the top of the bridge plate, and the piston rods of the plurality of rotary cylinders are fixedly connected to a pressing plate. A positioning assembly is provided on one side of each of the plurality of rotary cylinders.

[0009] As a further preference of this technical solution: The positioning assembly includes a positioning block, a first positioning pin and a second positioning pin. The positioning block is fixedly connected to one side of the rotary cylinder and is located above the piston rod of the rotary cylinder. The first positioning pin is fixedly connected to one side of the positioning block. A protrusion is provided on the positioning block, and the second positioning pin is fixedly connected to the upper side of the protrusion. A positioning ball is provided on the top of the rotary cylinder.

[0010] The present invention also provides a method for efficiently manufacturing an injector seat, including the following steps:

[0011] S1. Mold forming, obtaining a blank of the injector seat main body by mold forming processing;

[0012] S2. Machining, machining all the outer surfaces of the injector seat main body blank and the top and bottom sides of the injector seat branch blank to obtain a first semi-finished product of the injector seat main body;

[0013] S3. Drilling, machining a first circular counterbore and a number of circular small holes on the injector seat main body blank, and machining a circular through hole on the injector seat branch blank to obtain a second semi-finished product of the injector seat main body;

[0014] S4. Machine tool processing, clamping the second semi-finished product of the injector seat main body obtained in S3 on a four-axis machine tool with a special hydraulic fixture, and machining the keyway and the second circular counterbore at one time to obtain a finished part of the injector seat main body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The dimensional accuracy of the keyway and the connection hole of the injector seat main body is high, it is easy to assemble and there is no risk of oil leakage.

[0017] 2. By using a special hydraulic fixture on a four-axis machine tool, the dimensions of the keyway and the second circular counterbore on the injector seat main body are continuously machined at one time, improving the production efficiency and reducing the equipment requirements.

[0018] 3. The number of production stations can be increased to process multiple workpieces at a time, further improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic structural diagram of the injector seat body of the present invention;

[0021] Figure 2 Schematic perspective structural diagram of the injector seat body of the present invention;

[0022] Figure 3 Schematic structural diagram of the hydraulic fixture of the present invention;

[0023] Figure 4 Schematic structural diagram of the rotary oil cylinder of the present invention;

[0024] Figure 5 Schematic structural diagram of the blank of the injector seat body of the present invention;

[0025] Figure 6 Schematic structural diagram of the first semi-finished product of the injector seat body of the present invention;

[0026] Figure 7 Schematic structural diagram of the second semi-finished product of the injector seat body of the present invention;

[0027] Figure 8 Schematic structural diagram of the finished product of the injector seat body of the present invention;

[0028] Figure 9 Schematic structural diagram of the keyway machining position of the hydraulic fixture of the present invention;

[0029] Figure 10 Schematic structural diagram of the counterbore machining position of the hydraulic fixture of the present invention.

[0030] Explanation of the accompanying reference numerals: 1. Base plate; 2. First spacer block; 3. Four-axis tailstock; 4. Tailstock connecting plate; 5. Second spacer block; 6. Four-axis rotating head; 7. Four-axis head connecting plate; 8. Bridge plate; 9. Rotating cylinder; 10. Pressure plate; 11. Positioning block; 12. First positioning pin; 13. Second positioning pin; 14. Positioning ball; 15. Upper surface; 16. Curved surface; 17. Cylindrical surface; 18. Lower surface; 19. Injector seat branch; 20. Circular through hole; 21. First circular countersunk hole; 22. Second circular countersunk hole; 23. Keyway; 24. Small circular hole; 25. Injector seat body. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0033] Example

[0034] In the prior art, conventional three-axis machine tools are generally used for processing in two steps and four stations. However, the dimensional accuracy of the injector seat manufactured by this method is difficult to ensure, and the production efficiency is low.

[0035] See also Figure 1-10 The present invention provides a technical solution: an injector seat, comprising an injector seat body 25 and an injector seat branch 19 integrally formed with the injector seat body 25, wherein the injector seat body 25 is respectively provided with an upper surface 15, a curved surface 16, a cylindrical surface 17 and a lower surface 18, a circular through hole 20 is provided on the injector seat branch 19, a first circular countersunk hole 21 is provided on the lower surface 18, a second circular countersunk hole 22 is provided on the curved surface 16, a keyway 23 is provided on the cylindrical surface 17, and a plurality of circular small holes 24 are provided at the lower end of the cylindrical surface 17; the injector seat branch 19 is respectively provided with a top side surface and a bottom side surface, and one end of the injector seat branch 19 is provided with a connecting surface connecting the top side surface and the bottom side surface.

[0036] The curved surface 16 is adjacent to the upper surface 15, the cylindrical surface 17 is adjacent to the curved surface 16, the lower surface 18 is adjacent to the cylindrical surface 17, the center line of the circular through hole 20 is parallel to the first circular counterbore 21, the center line of the second circular counterbore 22 forms an oblique angle at a given angle in all three directions of the X-axis, Y-axis, and Z-axis, the dimensional accuracy of the keyway 23 is ±0.05 mm, and the accuracy of the oblique angle is ±0.5°.

[0037] A hydraulic fixture for an injector seat, comprising a base plate 1. First and second heightening blocks 2 and 5 are respectively and fixedly connected to two ends of the base plate 1. A four-axis tailstock 3 is installed on the top of the first heightening block 2. A tailstock connecting plate 4 is installed on one side of the four-axis tailstock 3. A four-axis rotary head 6 is installed on the top of the second heightening block 5. A four-axis head connecting plate 7 is installed on the side of the four-axis rotary head 6 opposite to the tailstock connecting plate 4. A bridge plate 8 is installed between the tailstock connecting plate 4 and the four-axis head connecting plate 7. A plurality of rotary cylinders 9 are provided on the top of the bridge plate 8. The piston rods of the plurality of rotary cylinders 9 are fixedly connected to a pressing plate 10. A positioning assembly is provided on one side of each of the plurality of rotary cylinders 9.

[0038] The positioning assembly includes a positioning block 11, a first positioning pin 12, and a second positioning pin 13. The positioning block 11 is fixedly connected to one side of the rotary cylinder 9 and is located above the piston rod of the rotary cylinder 9. The first positioning pin 12 is fixedly connected to one side of the positioning block 11. A protrusion is provided on the positioning block 11. The second positioning pin 13 is fixedly connected to the upper side of the protrusion. Through the setting of the positioning assembly, the keyway 23 and the second circular counterbore 22 on the injector seat body 25 can be continuously processed by a four-axis machine tool in one clamping, ensuring the structural shape and dimensional accuracy, improving the production efficiency and product qualification rate at the same time. A positioning ball 14 is provided on the top of the rotary cylinder 9. With a special hydraulic fixture including a spherical positioning structure and a double-pin positioning block, one-time clamping and machining of the workpiece at multiple spatial angles of the machining part are realized on a four-axis machine tool, and the tool structure is simple and easy to operate.

[0039] For the working principle or structural principle, according to the intersection line formed by the bottom plane of the keyway 23 and the step plane of the counterbore on the injector seat body 25, the fixture design ensures that the four-axis rotation axis is parallel to the intersection line. By rotating the bridge plate 8, the bridge plate 8, the bottom plane of the keyway 23 on the injector seat body 25, the step plane of the counterbore, and the machine tool platform can be made parallel. As Figure 9 shown, when the bridge plate 8 and the bottom plane of the keyway 23 are parallel to the machine tool platform, it is set as zero degree. The customized rotary cylinder 9 is fixed on the bridge plate 8 according to the angle formed by the four-axis rotation axis and the large end face of the injector seat body 25. A positioning ball 14 is provided on the rotary cylinder 9. When designing the fixture, the dimension from the center of the positioning ball 14 to the plane of the bridge plate 8 and the relative dimension to the keyway 23 are fixed. According to the relative dimension from the center of the positioning ball 14 to the keyway 23 provided by the design, the machining of the keyway 23 can be realized. As Figure 10As shown, after the above keyway 23 is machined, the bridge plate 8 rotates clockwise according to the included angle formed by the bottom plane of the keyway 23 and the stepped plane of the counterbore, so that the stepped plane of the counterbore is parallel to the machine tool platform plane. Since the positional dimension of the positioning ball 14 relative to the product is fixed, within the coordinate system of the four-axis rotation, the dimensional distance between the central axis of the counterbore and the positioning ball 14, and the dimensional distance from the plane of the second circular counterbore 22 to the center of the ball are calculated by the design software. Based on the calculated dimensional distances, the position of the hole and the counterbore can be determined, thereby realizing the machining of the second circular counterbore 22.

[0040] The present invention also provides a method for efficiently manufacturing an injector seat, comprising the following steps:

[0041] S1. Mold forming, obtaining a blank of the injector seat body 25 by mold forming processing;

[0042] S2. Machining, machining all the outer surfaces of the blank of the injector seat body 25 and the top and bottom side surfaces of the blank of the injector seat branch 19 to obtain a first semi-finished product of the injector seat body 25;

[0043] S3. Drilling, machining a first circular counterbore 21 and a plurality of circular small holes 24 on the blank of the injector seat body 25, and machining a circular through hole 20 on the blank of the injector seat branch 19 to obtain a second semi-finished product of the injector seat body 25;

[0044] S4. Machine tool processing, clamping the second semi-finished product of the injector seat body 25 obtained in S3 by a special hydraulic fixture on a four-axis machine tool, and machining the keyway 23 and the second circular counterbore 22 at one time to obtain a finished part of the injector seat body 25.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injector seat, comprising an injector seat body (25) and an injector seat branch (19) integrally formed with the injector seat body (25), characterized in that: The injector seat body (25) is respectively provided with an upper surface (15), a curved surface (16), a cylindrical surface (17) and a lower surface (18). A circular through hole (20) is provided on the injector seat branch (19). A first circular counterbore (21) is provided on the lower surface (18). A second circular counterbore (22) is provided on the curved surface (16). A keyway (23) is provided on the cylindrical surface (17). A plurality of circular small holes (24) are provided at the lower end of the cylindrical surface (17). The injector seat branch (19) is respectively provided with a top side surface and a bottom side surface. One end of the injector seat branch (19) is provided with a connecting surface connecting the top side surface and the bottom side surface. The curved surface (16) is adjacent to the upper surface (15). The cylindrical surface (17) is adjacent to the curved surface (16). The lower surface (18) is adjacent to the cylindrical surface (17). The center line of the circular through hole (20) is parallel to the first circular counterbore (21). The center line of the second circular counterbore (22) forms an oblique angle with given angles in the three directions of the X-axis, Y-axis and Z-axis. The dimensional accuracy of the keyway (23) is ±0.05 mm. The accuracy of the oblique angle is ±0.5°.

2. The hydraulic fixture for an injector seat according to claim 1, comprising a bottom plate (1), characterized in that: Both ends of the bottom plate (1) are respectively fixedly connected with a first heightening block (2) and a second heightening block (5). A four-axis tailstock (3) is installed on the top of the first heightening block (2). A tailstock connection disc (4) is installed on one side of the four-axis tailstock (3). A four-axis rotary head (6) is installed on the top of the second heightening block (5). A four-axis head connection disc (7) is installed on the side of the four-axis rotary head (6) opposite to the tailstock connection disc (4). A bridge plate (8) is installed between the tailstock connection disc (4) and the four-axis head connection disc (7). A plurality of rotary cylinders (9) are provided on the top of the bridge plate (8). The piston rods of the plurality of rotary cylinders (9) are fixedly connected with a pressing plate (10). A positioning component is provided on one side of each of the plurality of rotary cylinders (9). The positioning component includes a positioning block (11), a first positioning pin (12) and a second positioning pin (13). The positioning block (11) is fixedly connected to one side of the rotary cylinder (9) and is located above the piston rod of the rotary cylinder (9). The first positioning pin (12) is fixedly connected to one side of the positioning block (11). A protrusion is provided on the positioning block (11). The second positioning pin (13) is fixedly connected to one side of the protrusion. A positioning ball (14) is provided on the top of the rotary cylinder (9).

3. A method for efficiently manufacturing an injector seat according to any one of claims 1-2, characterized in that: Including the following steps: S1. Mold forming, obtaining a blank of the injector seat body (25) by mold forming processing. S2. Machining, machining all the outer surfaces of the blank of the injector seat body (25) and the top side surface and the bottom side surface of the blank of the injector seat branch (19) to obtain a first semi-finished product of the injector seat body (25). S3, drilling, machining a first circular countersunk hole (21) and a plurality of circular small holes (24) on the blank of the fuel injector seat body (25), machining a circular through hole (20) on the blank of the fuel injector seat branch (19), and obtaining a second semi-finished product of the fuel injector seat body (25); S4, machine tool processing, using a special hydraulic clamp to clamp the second semi-finished product of the injector seat body (25) obtained in S3 on a four-axis machine tool, completing the processing of the keyway (23) and the second circular countersunk hole (22) at one time to obtain the finished part of the injector seat body (25).

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