A high-efficiency processing device for both ends of a high-pressure common rail pipe

Abstract

This invention relates to a high-efficiency synchronous machining device for both ends of a high-pressure common rail tube. It solves the technical problems of existing machining methods failing to meet concentricity and positional accuracy requirements. The device includes a central drive spindle assembly, with cutting tools at both ends. An axially penetrating clamping channel is provided on the inner circumferential side of the central drive spindle assembly, and a fixture seat is provided within the clamping channel. The fixture seat has a radially split structure, and a high-pressure common rail tube or a standard alignment bar is mounted within the fixture seat via a positioning connection structure. The ends of the high-pressure common rail tube and the standard alignment bar protrude from the ends of the fixture seat. The fixture seat is fixed to the central drive spindle assembly by the clamping assembly. The advantages are: this device mounts the high-pressure common rail tube onto the central drive spindle assembly via the fixture seat, enabling synchronous machining of both ends of the high-pressure common rail tube, improving machining efficiency, and ensuring the positional and concentricity accuracy of the high-pressure common rail tube parts.

Description

Technical Field

[0001] This invention belongs to the field of common rail pipe technology, specifically relating to a high-pressure common rail pipe synchronous and efficient processing device at both ends. Background Technology

[0002] The high-pressure common rail system mainly consists of three parts: a high-pressure oil pump, a common rail pipe, and fuel injectors. The high-pressure common rail pipe is a hollow, long tubular metal body. Its function is to store high-pressure fuel supplied by the high-pressure oil pump, suppress pressure fluctuations, and provide stable high-pressure fuel to the fuel injectors. Because the high-pressure common rail pipe is a non-standard part that needs to withstand high pressure output, it requires high machining precision. Traditional machining methods, such as CNC lathes, four-axis machining centers, and boring machines, require multi-stage machining or reversing machining, which cannot meet the concentricity and positional accuracy requirements of the workpiece drawings. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a high-efficiency processing device for both ends of a high-pressure common rail pipe.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure common rail tube synchronous high-efficiency machining device, comprising a central drive spindle assembly, wherein lathe tools are respectively provided at both ends of the central drive spindle assembly, and a clamping channel axially penetrating the central drive spindle assembly is provided on the inner circumferential side of the central drive spindle assembly, wherein a fixture seat is provided in the clamping channel, the fixture seat having a radially split structure, and a high-pressure common rail tube or a standard calibration bar is provided in the fixture seat through a positioning connection structure, wherein the ends of the high-pressure common rail tube and the standard calibration bar are respectively exposed at the ends of the fixture seat, and the fixture seat is fixed to the central drive spindle assembly by the clamping assembly. The high-pressure common rail tube is disposed in the fixture seat, and the fixture seat is connected to the central drive spindle assembly through the clamping assembly, while both ends of the high-pressure common rail tube are exposed at the ends of the fixture seat, thus enabling synchronous machining of both ends of the high-pressure common rail tube, improving machining efficiency and ensuring machining accuracy.

[0005] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the clamp seat is formed by radially assembling an upper shell and a lower shell. The upper shell has an upper clamp mounting groove, and the inner side of the lower shell has a lower clamp mounting groove corresponding to the upper clamp mounting groove. The upper and lower clamp mounting grooves are assembled to form a clamp installation channel with openings at both ends for the high-pressure common rail pipe or standard calibration bar to pass through. The upper and lower clamp mounting grooves facilitate the installation of the high-pressure common rail pipe or standard calibration bar. The openings allow the end of the high-pressure common rail pipe or standard calibration bar to extend out of the clamp seat. The lower clamp mounting groove has downwardly recessed placement grooves at both ends. The high-pressure common rail pipe has several downwardly protruding protrusions on one side, and two protrusions in the middle of the high-pressure common rail pipe are located in the placement grooves, thus enabling better installation of the high-pressure common rail pipe.

[0006] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the lower housing is provided with clamp connecting parts at both ends. A rectangular thickening pad is provided on the upper side of the clamp connecting parts near the upper housing. The thickening pad has a pad fixing hole on its inner circumferential side, and the clamp connecting parts have clamp fixing holes corresponding to the pad fixing holes on their inner circumferential side. The pad fixing holes and clamp fixing holes are connected by fixing bolts. The thickening pad plays an auxiliary role when the high-pressure common rail pipe or standard calibration bar is connected to the lower housing.

[0007] In the above-mentioned high-pressure common rail pipe synchronous high-efficiency processing device, one end of the thickened pad is provided with a first pad connection hole, the other end of the thickened pad away from the first pad connection hole is provided with a second pad connection hole, one end of the clamp connection part is provided with a first clamp connection hole corresponding to the first pad connection hole, and the other end is provided with a second clamp connection hole corresponding to the second pad connection hole.

[0008] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the upper end of the lower housing is provided with several clamping positioning pins on both sides, and the lower end of the upper housing is provided with several clamping positioning holes corresponding to the clamping positioning pins on both sides. The lower housing is connected to the clamping positioning holes of the upper housing through the clamping positioning pins.

[0009] In the above-mentioned high-pressure common rail pipe synchronous high-efficiency processing device, the high-pressure common rail pipe or standard calibration bar is set in the fixture installation channel and located at the upper end of the thickening pad. The length of the high-pressure common rail pipe and the length of the standard calibration bar are both greater than the length of the fixture installation channel. The cutting tool is located at both ends of the high-pressure common rail pipe and / or both ends of the standard calibration bar.

[0010] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the positioning connection structure includes pipe body connection parts disposed at both ends of one side of the high-pressure common rail pipe and corresponding to the clamp connection parts. One end of each pipe body connection part has a first pipe body connection hole corresponding to a first clamp connection hole, and the other end has a second pipe body connection hole corresponding to a second clamp connection hole. The high-pressure common rail pipe is connected to the clamp connection parts through the pipe body connection parts, ensuring the operational stability of the high-pressure common rail pipe.

[0011] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the first pipe body connecting hole, the first pad connecting hole, and the first clamp connecting hole correspond one-to-one and are connected by a reamed positioning screw. The second pipe body connecting hole, the second pad connecting hole, and the second clamp connecting hole correspond one-to-one and are connected by a coarse positioning pin. A washer is provided between the reamed positioning screw and the high-pressure common rail pipe. First, the coarse positioning pin is used to ensure the correct connection position of the high-pressure common rail pipe, and then the reamed positioning screw is used to connect the high-pressure common rail pipe to the lower housing.

[0012] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the positioning connection structure includes calibration bar connecting parts disposed at both ends of a standard calibration bar and corresponding to the clamp connecting parts. Each calibration bar connecting part has calibration bar connecting holes corresponding to the first clamp connecting holes. The calibration bar connecting holes, the first pad connecting holes, and the first clamp connecting holes are all one-to-one corresponding and connected by hinged positioning screws. The standard calibration bar is used to adjust the concentricity of the clamp seat, which is beneficial for the use of high-pressure common rail pipes.

[0013] In the aforementioned high-pressure common rail pipe synchronous high-efficiency processing device, the clamping assembly includes chuck seats respectively sleeved on both ends of the fixture seat. The chuck seats have an inclined portion on their outer circumference, and the clamping channels have limiting portions corresponding to the inclined portions on their inner sides. After the high-pressure common rail pipe is connected to the fixture seat, the fixture seat is connected to the central drive spindle assembly via the chuck seats.

[0014] Compared with existing technologies, the advantages of this invention are:

[0015] 1. This device uses a fixture to mount the high-pressure common rail pipe onto the central drive spindle assembly, enabling simultaneous processing at both ends of the high-pressure common rail pipe, which improves processing efficiency and ensures the positional and concentricity accuracy of the high-pressure common rail pipe parts.

[0016] 2. This device uses a standard calibration bar to determine the radial position of the fixture seat. A lathe tool is used to align the center holes at both ends of the standard calibration bar and the outer circle of the fixture seat is precision ground to make the axis of the fixture seat concentric with the axis of the standard calibration bar, which is beneficial for the use of high-pressure common rail pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is an exploded view of the structure of the present invention.

[0019] Figure 3 This is a structural cross-sectional view of the present invention.

[0020] Figure 4 This is an exploded view of the fixture base in this invention.

[0021] Figure 5 This is a schematic diagram of the upper shell structure in this invention.

[0022] Figure 6 This is a schematic diagram of the lower shell structure in this invention.

[0023] Figure 7 This is a schematic diagram of the high-pressure common rail pipe in this invention.

[0024] Figure 8 This is a schematic diagram of the structure of the standard calibration bar in this invention.

[0025] In the diagram: 1. Central drive spindle assembly; 11. Cutting tool; 12. Clamping channel; 2. Fixture seat; 21. Upper housing; 22. Lower housing; 23. Upper fixture mounting slot; 24. Lower fixture mounting slot; 25. Opening; 26. Fixture mounting channel; 27. Fixture connecting part; 28. Fixture positioning pin; 29. ​​Fixture positioning hole; 3. Positioning connection structure; 31. Tube body connecting part; 32. First tube body connecting hole; 33. Second tube body connecting hole; 34. Reaming positioning screw; 35. Coarse positioning pin; 36. Washer; 37. Alignment bar connecting part; 38. Alignment bar connecting hole; 4. High-pressure common rail pipe; 5. Standard alignment bar; 6. Clamping assembly; 61. Chuck seat; 62. Inclined part; 63. Limiting part; 7. Thickened pad; 71. Pad fixing hole; 72. Fixture fixing hole; 73. First pad connecting hole; 74. Second pad connecting hole; 75. First fixture connecting hole; 76. Second fixture connecting hole. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-8 As shown, a high-pressure common rail pipe synchronous high-efficiency machining device includes a central drive spindle assembly 1. Each end of the central drive spindle assembly 1 is equipped with a cutting tool 11. A clamping channel 12, axially penetrating the central drive spindle assembly 1, is provided on the inner circumferential side of the central drive spindle assembly 1. A fixture seat 2 is provided within the clamping channel 12. The fixture seat 2 has a radially split structure. A high-pressure common rail pipe 4 or a standard calibration bar 5 is provided within the fixture seat 2 via a positioning connection structure 3. Both ends of the high-pressure common rail pipe 4 and the standard calibration bar 5 protrude from the ends of the fixture seat 2, and the fixture seat 2 is fixed to the central drive spindle assembly 1 via a clamping assembly 6. The high-pressure common rail pipe 4 is disposed within the fixture seat 2, and the fixture seat 2 is connected to the central drive spindle assembly 1 via the clamping assembly 6. Simultaneously, both ends of the high-pressure common rail pipe 4 protrude from the ends of the fixture seat 2, thus enabling synchronous machining of both ends of the high-pressure common rail pipe 4, improving machining efficiency and ensuring machining accuracy.

[0028] Combination Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the clamp base 2 is formed by radially joining an upper shell 21 and a lower shell 22. The upper shell 21 has an upper clamp mounting groove 23, and the inner side of the lower shell 22 has a lower clamp mounting groove 24 corresponding to the upper clamp mounting groove 23. The upper clamp mounting groove 23 and the lower clamp mounting groove 24 are joined together to form a clamp mounting channel 26 for the high-pressure common rail pipe 4 or the standard calibration rod 5 to pass through, with openings 25 at both ends. The upper clamp mounting groove 23 and the lower clamp mounting groove 24 facilitate the installation of the high-pressure common rail pipe 4 or the standard calibration rod 5. The openings 25 are for the end of the high-pressure common rail pipe 4 or the end of the standard calibration rod 5 to extend out of the clamp base 2. The lower clamp mounting groove 24 has downwardly recessed placement grooves at both ends. The high-pressure common rail pipe 4 has several downwardly protruding protrusions on one side, and two protrusions in the middle of the high-pressure common rail pipe 4 are located in the placement grooves, thereby making the high-pressure common rail pipe 4 easier to install.

[0029] The lower housing 22 has clamp connecting parts 27 at both ends. A rectangular thickening pad 7 is provided on the upper side of the clamp connecting part 27 near the upper housing 21. The thickening pad 7 has a pad fixing hole 71 on its inner circumference, and a clamp fixing hole 72 corresponding to the pad fixing hole 71 is provided on the inner circumference of the clamp connecting part 27. The pad fixing hole 71 and the clamp fixing hole 72 are connected by fixing bolts. The thickening pad 7 plays an auxiliary role when the high-pressure common rail pipe 4 or standard calibration bar 5 is connected to the lower housing 22.

[0030] Specifically, the thickened pad 7 has a first pad connection hole 73 at one end and a second pad connection hole 74 at the other end away from the first pad connection hole 73. The clamp connection part 27 has a first clamp connection hole 75 at one end corresponding to the first pad connection hole 73 and a second clamp connection hole 76 at the other end corresponding to the second pad connection hole 74.

[0031] Furthermore, the lower housing 22 has several clamping positioning pins 28 on both sides of its upper end, and the upper housing 21 has several clamping positioning holes 29 on both sides of its lower end, corresponding to the clamping positioning pins 28. The lower housing 22 is connected to the clamping positioning holes 29 of the upper housing 21 through the clamping positioning pins 28.

[0032] Furthermore, the high-pressure common rail 4 or the standard calibration bar 5 is set in the fixture installation channel 26 and located at the upper end of the thickened pad block 7. The length of the high-pressure common rail 4 and the length of the standard calibration bar 5 are both greater than the length of the fixture installation channel 26. The cutting tool 11 is located at both ends of the high-pressure common rail 4 and / or both ends of the standard calibration bar 5.

[0033] like Figure 7As shown, the positioning connection structure 3 includes pipe body connection portions 31 disposed at both ends of one side of the high-pressure common rail pipe 4 and corresponding to the clamp connection portion 27. One end of the pipe body connection portion 31 is provided with a first pipe body connection hole 32 corresponding to the first clamp connection hole 75, and the other end is provided with a second pipe body connection hole 33 corresponding to the second clamp connection hole 76. The high-pressure common rail pipe 4 is connected to the clamp connection portion 27 through the pipe body connection portion 31 to ensure the operational stability of the high-pressure common rail pipe 4.

[0034] The first tube body connecting hole 32, the first pad connecting hole 73, and the first clamp connecting hole 75 correspond one-to-one and are connected by a hinged positioning screw 34. The second tube body connecting hole 33, the second pad connecting hole 74, and the second clamp connecting hole 76 correspond one-to-one and are connected by a coarse positioning pin 35. A washer 36 is provided between the hinged positioning screw 34 and the high-pressure common rail pipe 4. First, the coarse positioning pin 35 is used to ensure that the connection position of the high-pressure common rail pipe 4 is correct. Then, the hinged positioning screw 34 is used to connect the high-pressure common rail pipe 4 to the lower housing 22.

[0035] like Figure 8 As shown, the positioning connection structure 3 includes a calibration bar connection part 37 disposed at both ends of one side of the standard calibration bar 5 and corresponding to the clamp connection part 27. The calibration bar connection part 37 is provided with a calibration bar connection hole 38 corresponding to the first clamp connection hole 75. The calibration bar connection hole 38, the first pad block connection hole 73, and the first clamp connection hole 75 correspond one-to-one and are connected by a hinged positioning screw 34. The standard calibration bar 5 is used to adjust the concentricity of the clamp seat 2, which is beneficial to the use of the high-pressure common rail pipe 4.

[0036] Combination Figure 2 and Figure 3 As shown, the clamping assembly 6 includes chuck seats 61 respectively sleeved on both ends of the clamping seat 2. The chuck seats 61 are provided with inclined portions 62 on the outer periphery, and the clamping channels 12 are provided with limiting portions 63 corresponding to the inclined portions 62 on the inner sides of both ends. After the high-pressure common rail pipe 4 is connected to the clamping seat 2, the clamping seat 2 is connected to the central drive spindle assembly 1 through the chuck seats 61.

[0037] The principle of this embodiment is as follows:

[0038] The standard calibration bar 5 is placed in the lower fixture mounting slot 24 of the lower housing 22. The calibration bar connecting hole 38 of the standard calibration bar 5 is connected to the first fixture connecting hole 75 of the lower housing 22 through the reamer positioning screw 34 to determine the radial position. The lathe tool 11 is aligned with the center holes at both ends of the standard calibration bar 5, and the outer circle of the fixture seat 2 is finely ground to make the axis of the fixture seat 2 concentric with the axis of the standard calibration bar 5. The standard calibration bar 5 is removed, and the high-pressure common rail tube 4 is installed and fixed with the coarse positioning pin 35 through the reamer positioning screw 34. The fixture seat 2 is then connected to the central drive spindle assembly 1 through the chuck seat 61. Both ends of the high-pressure common rail tube 4 are processed synchronously, which improves the processing efficiency and also ensures the positional and concentricity accuracy of the high-pressure common rail tube 4 parts.

[0039] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0040] Although this article uses a lot of terms such as central drive spindle assembly 1, cutting tool 11, clamping channel 12, fixture seat 2, upper housing 21, lower housing 22, upper fixture mounting slot 23, lower fixture mounting slot 24, opening 25, fixture mounting channel 26, fixture connecting part 27, fixture positioning pin 28, fixture positioning hole 29, positioning connection structure 3, tube body connecting part 31, first tube body connecting hole 32, second tube body connecting hole 33, reaming positioning screw 34, coarse positioning pin 35, washer 36, alignment bar connecting part 37, alignment bar connecting hole 38, high pressure common rail tube 4, standard alignment bar 5, clamping assembly 6, chuck seat 61, tilting part 62, limiting part 63, thickened pad 7, pad fixing hole 71, fixture fixing hole 72, first pad connecting hole 73, second pad connecting hole 74, first fixture connecting hole 75, second fixture connecting hole 76, the possibility of using other terms cannot be excluded. The use of these terms is merely for the convenience of describing and explaining the nature of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A high-pressure common rail pipe synchronous high-efficiency machining device, comprising a central drive spindle assembly (1), wherein turning tools (11) are respectively provided at both ends of the central drive spindle assembly (1), and a clamping channel (12) axially penetrating the central drive spindle assembly (1) is provided on the inner side of the central drive spindle assembly (1), and a clamping seat (2) is provided in the clamping channel (12), characterized in that, The fixture seat (2) has a radial split structure. The fixture seat (2) is provided with a high-pressure common rail pipe (4) or a standard calibration bar (5) through a positioning connection structure (3). The two ends of the high-pressure common rail pipe (4) and the standard calibration bar (5) are exposed at the ends of the fixture seat (2). The fixture seat (2) is fixed to the central drive spindle assembly (1) through a clamping assembly (6). The clamp seat (2) is formed by the upper shell (21) and the lower shell (22) being joined together radially. The upper shell (21) has an upper clamp mounting groove (23), and the lower shell (22) has a lower clamp mounting groove (24) corresponding to the upper clamp mounting groove (23) on its inner side. The upper clamp mounting groove (23) and the lower clamp mounting groove (24) are joined together to form a clamp mounting channel (26) through which the high-pressure common rail pipe (4) or standard calibration bar (5) is passed and which has openings (25) at both ends. The lower housing (22) is provided with clamp connecting parts (27) at both ends. The clamp connecting parts (27) are provided with a rectangular thickening pad (7) on the upper side near the upper housing (21). The thickening pad (7) is provided with a pad fixing hole (71) on the inner side of the circumference. The clamp connecting parts (27) are provided with a clamp fixing hole (72) corresponding to the pad fixing hole (71) on the inner side of the circumference. The pad fixing hole (71) and the clamp fixing hole (72) are connected by a fixing bolt. The thickened pad (7) has a first pad connecting hole (73) at one end and a second pad connecting hole (74) at the other end away from the first pad connecting hole (73). The clamp connecting part (27) has a first clamp connecting hole (75) at one end corresponding to the first pad connecting hole (73) and a second clamp connecting hole (76) at the other end corresponding to the second pad connecting hole (74). The positioning connection structure (3) includes a pipe body connection part (31) located at both ends of the high-pressure common rail pipe (4) and corresponding to the clamp connection part (27). One end of the pipe body connection part (31) is provided with a first pipe body connection hole (32) corresponding to the first clamp connection hole (75), and the other end is provided with a second pipe body connection hole (33) corresponding to the second clamp connection hole (76).

2. The high-pressure common rail pipe synchronous high-efficiency processing device according to claim 1, characterized in that, The lower housing (22) is provided with several clamp positioning pins (28) on both sides of the upper end, and the upper housing (21) is provided with several clamp positioning holes (29) corresponding to the clamp positioning pins (28) on both sides of the lower end.

3. The high-pressure common rail pipe synchronous high-efficiency processing device according to claim 1, characterized in that, The high-pressure common rail (4) or standard calibration bar (5) is set in the fixture installation channel (26) and located at the upper end of the thickened pad (7). The length of the high-pressure common rail (4) and the length of the standard calibration bar (5) are both greater than the length of the fixture installation channel (26). The cutting tool (11) is located at both ends of the high-pressure common rail (4) and / or both ends of the standard calibration bar (5).

4. The high-pressure common rail pipe synchronous high-efficiency processing device according to claim 1, characterized in that, The first tube body connecting hole (32), the first pad connecting hole (73) and the first clamp connecting hole (75) correspond one-to-one and are connected by a hinged positioning screw (34). The second tube body connecting hole (33), the second pad connecting hole (74) and the second clamp connecting hole (76) correspond one-to-one and are connected by a coarse positioning pin (35). A washer (36) is provided between the hinged positioning screw (34) and the high-pressure common rail pipe (4).

5. The high-pressure common rail pipe synchronous high-efficiency processing device according to claim 3, characterized in that, The positioning connection structure (3) includes a rod connection part (37) located at both ends of the standard rod (5) and corresponding to the clamp connection part (27). The rod connection part (37) is provided with a rod connection hole (38) corresponding to the first clamp connection hole (75). The rod connection hole (38), the first pad block connection hole (73) and the first clamp connection hole (75) are in one-to-one correspondence and connected by a hinged positioning screw (34).

6. The high-pressure common rail pipe synchronous high-efficiency processing device according to claim 1, characterized in that, The clamping assembly (6) includes a chuck seat (61) respectively sleeved on both ends of the clamp seat (2). The chuck seat (61) is provided with an inclined portion (62) on the outer side of its circumference. The clamping channel (12) is provided with a limiting portion (63) corresponding to the inclined portion (62) on the inner side of both ends.

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