A tool electrode for manufacturing a hydraulic pump housing

Abstract

A kind of hydraulic pump shell based on electrical discharge machining includes cylinder wall, flange, mounting convex column, mounting screw hole, transmission shaft hole, shaft hole boss, cylinder bottom, flange hole, hydraulic control cylinder body, control liquid channel, bottom arc slot A, bottom arc slot B, bottom arc slot C, bottom arc slot D, milling port, cylinder inner wall strip groove, control return spring seat hole, control piston hole;Its characterized in that: the cylinder wall inner wall is equipped with cylinder inner wall strip groove;The cylinder bottom inner wall is equipped with bottom arc slot A, bottom arc slot B, bottom arc slot C, bottom arc slot D;Beneficial effect is: can promote the stability of aviation hydraulic system;Improve the quality and service life of aviation hydraulic pump;Beneficial to the energy saving of aviation aircraft, reduce failure rate, improve the production efficiency of aviation hydraulic system, promote flight endurance, improve the flight efficiency of aircraft;Promote the development of China's aviation industry.

Description

TECHNICAL FIELD

[0001] The present application relates to an aeronautical hydraulic pump component, in particular to a tool electrode for manufacturing a hydraulic pump housing. BACKGROUND

[0002] Electrical discharge machining (EDM), also known as spark machining or spark-erosion machining, is a special processing method that uses the electrical erosion effect generated between two electrodes immersed in a working fluid to remove conductive materials; electrical discharge machining is a completely different new technology from mechanical processing. With the development of industrial production and the progress of science and technology, various new materials and complex structure devices are constantly emerging, and there are more and more workpieces with complex structures and special process requirements. Therefore, developing and utilizing electrical discharge forming machining is the need of the times and the progress of modern mechanical processing technology.

[0003] Electrical discharge forming machining is to connect one pole of a pulse power source to a tool electrode and the other pole to a workpiece electrode, both poles being immersed in a liquid medium with a certain degree of insulation; the tool electrode is controlled by an automatic feed adjustment device to ensure that the tool and the workpiece maintain a very small discharge gap during normal machining; when a pulse voltage is applied between the two poles, the liquid medium at the closest point between the two poles is broken down, forming a small discharge channel; due to the very small cross-sectional area of the channel and the extremely short discharge time, the energy is highly concentrated, and the instantaneous high temperature generated in the discharge area is sufficient to melt or even evaporate the material, resulting in a small pit. After the first pulse discharge ends, a second pulse will break down and discharge at another closest point after a very short interval. This cycle is repeated at a high frequency, and the tool electrode is continuously fed to the workpiece. Its shape is ultimately replicated on the workpiece, forming the desired special structure workpiece.

[0004] The advantages of electrical discharge machining are: due to the high energy density of pulse discharge, it is convenient to process special materials and complex-shaped workpieces that are difficult or impossible to process by ordinary mechanical processing methods; it is not affected by material hardness and heat treatment conditions; the pulse discharge duration is extremely short, and the heat generated during discharge has a small range of conduction and diffusion, and the material is affected by a small range of heat; during machining, the tool electrode and the workpiece material do not come into contact, and the macroscopic force between them is extremely small; the tool electrode material does not need to be harder than the workpiece material, so the tool electrode is easy to manufacture; it can reform the structure of the workpiece, simplify the processing technology, improve the service life of the workpiece, and reduce the labor intensity of workers, etc.

[0005] Aeronautical hydraulic pumps are the core part of aircraft, and with the continuous development and progress of aviation technology, the performance and weight requirements are becoming higher and higher; in particular, the structure and weight of the aeronautical hydraulic pump housing are increasingly required to be lightweight and long-service-life; therefore, researching electrical discharge forming machining of the aeronautical hydraulic pump housing is a very meaningful and good job. SUMMARY

[0006] The application provides a tool electrode for manufacturing a hydraulic pump shell, which can solve the problems mentioned in the background art.

[0007] The technical scheme for solving the technical problems of the application is: according to the special advantages of electric spark forming machining and the need for compact structure and light weight of an aviation hydraulic pump shell, the structure of the aviation hydraulic pump shell is simplified; and the special machining of the simplified structure is manufactured by using electric spark forming machining manufacturing technology and equipment.

[0008] Firstly, the traditional combined structure is designed into an integrated structure; that is, the combined structure of the aviation hydraulic pump shell is designed into an integrated structure; the new design of the aviation hydraulic pump shell of the application comprises a cylinder wall, a flange, a mounting protruding column, a mounting screw hole, a transmission shaft hole, a shaft hole boss, a cylinder bottom, a flange hole, a hydraulic control cylinder body, a control liquid channel, a bottom arc-shaped groove A, a bottom arc-shaped groove B, a bottom arc-shaped groove C, a bottom arc-shaped groove D, a milling port, a cylinder bottom inner wall strip groove, a control reset spring seat hole and a control piston hole.

[0009] Secondly, the structure of the shell blank is constructed, the blank comprises a cylinder wall M, a flange M, a mounting protruding column M, a shaft hole boss M, a cylinder bottom M and a hydraulic control cylinder body M; the blank is a cylindrical structure, has the cylinder wall M and the cylinder bottom M; the cylinder wall M is provided with the flange M at the port and has four protruding mounting protruding columns M uniformly distributed at the bottom; the cylinder bottom M is provided with the shaft hole boss M at the middle part.

[0010] Thirdly, the shell blank is initially machined; the flange hole is machined at the flange; the mounting screw hole is machined at the center of the four protruding mounting protruding columns M; the transmission shaft hole is machined at the shaft hole boss; the control liquid channel is machined at the center of the hydraulic control cylinder body; the milling port is machined at the middle and lower part of the hydraulic control cylinder body; and the shell semi-finished product is obtained.

[0011] Fourthly, electric spark forming machining is performed.

[0012] 1. The design and structure of tool electrode A; the tool electrode A includes tool electrode die A, gas-electric connection pipe A, gas connection nozzle A, machine tool connection end A, gas connection pipe, electrode die body A, fan-shaped gas blowing port A; the upper end of the gas-electric connection pipe A is provided with the machine tool connection end A, and the lower end is provided with the tool electrode die A; the machine tool connection end A is a cylindrical solid body with a diameter of 10-30 mm and a length of 20-40 mm; the machine tool connection end A is downward to the tool electrode die A as the gas-electric connection pipe A, and the gas-electric connection pipe A is provided with the gas connection nozzle A for ventilation near the lower end of the machine tool connection end A, which is connected with the gas connection pipe; the gas-electric connection pipe A is a hollow pipe with a shape of vertical-horizontal-vertical; the tool electrode die A includes the electrode die body A and the fan-shaped gas blowing port A, the electrode die body A is a cylinder with four fan-shaped gas blowing ports A in the middle, and the four fan-shaped gas blowing ports A are all communicated with the gas connection nozzle A through the gas-electric connection pipe A; the four fan-shaped gas blowing ports A are used for the metal slag particles generated by gas blowing processing during electric spark forming machining, so that the discharge performance between the electrode die A and the workpiece is good, the processing efficiency is high, and the quality is good;

[0013] 2. The processing of the control reset spring hole seat, using the electric spark forming machining machine tool and the tool electrode A of 1 in the fourth step to process the control reset spring hole seat of the shell semi-finished product of the third step; the tool electrode A is arranged at the machine tool chuck of the electric spark forming machining machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining machine tool, the machining position is calibrated, and electric spark forming machining is implemented, so that the shell semi-finished product has the control reset spring seat hole at the lower part of the milling port after processing;

[0014] 3. The design and structure of tool electrode B; the tool electrode B includes tool electrode die B, gas-electric connection straight pipe B, gas-electric connection elbow pipe B, gas connection nozzle B, machine tool connection end B, gas connection pipe, straight-through gas blowing port B, electrode die body B, fan-shaped gas blowing port B; the upper end of the gas-electric connection straight pipe B is provided with the machine tool connection end B, and the lower end is provided with the straight-through gas blowing port B; the gas-electric connection elbow pipe B is laterally arranged on the upper part of the straight-through gas blowing port B; the upper end of the gas-electric connection elbow pipe B is provided with the tool electrode die B; the machine tool connection end B is a cylindrical solid body with a diameter of 10-30 mm and a length of 20-40 mm; there are gas-electric connection straight pipe B and gas-electric connection elbow pipe B between the machine tool connection end B and the tool electrode die B, the gas-electric connection straight pipe B and the gas-electric connection elbow pipe B are hollow pipes, a gas connection nozzle B for gas connection is arranged on the gas-electric connection straight pipe B below the machine tool connection end B, the gas connection nozzle B is connected with a gas connection pipe; the tool electrode die B includes an electrode die body B and fan-shaped gas blowing ports B, the electrode die body B is a cylindrical body with four fan-shaped gas blowing ports B arranged in the middle, the four fan-shaped gas blowing ports B are all in communication with the gas connection nozzle B through the gas-electric connection straight pipe B; the gas connection nozzle B is in communication with the straight-through gas blowing port B and the four fan-shaped gas blowing ports B through the gas-electric connection straight pipe B and the gas-electric connection elbow pipe B; the four fan-shaped gas blowing ports B are used for blowing away metal slag particles generated during electric spark forming machining, so that the discharge performance between the electrode die B and the workpiece is good, the machining efficiency is high, and the quality is good;

[0015] 4. Controlling the processing of the piston hole, using the electric spark forming machining tool and the tool electrode B of 3 in the fourth step to process the shell semi-finished product of the third step; the tool electrode B is arranged at the machine tool chuck of the electric spark forming machining tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining tool, the processing position is calibrated, electric spark forming machining is performed, and the shell semi-finished product has a control piston hole on the upper part of the milling port after processing;

[0016] 5. The design and structure of tool electrode C; the tool electrode C includes tool electrode die C, gas-electric connection pipe C, gas connection nozzle C, machine tool connection end C, gas connection pipe, electrode die body C, and straight-line gas blowing port C; the upper end of the gas-electric connection pipe C is provided with the machine tool connection end C, and the lower end is provided with the tool electrode die C; the machine tool connection end C is a cylindrical solid body with a diameter of 10-30 mm and a length of 20-40 mm; the machine tool connection end C is connected to the tool electrode die C through the gas-electric connection pipe C, and a gas connection nozzle C for gas communication is arranged on the gas-electric connection pipe C near the machine tool connection end C; the gas connection nozzle C is connected to the gas connection pipe, and the gas-electric connection pipe C is a hollow pipe; the tool electrode die C includes an electrode die body C and a straight-line gas blowing port C; the electrode die body C is a cylindrical body provided with a straight-line gas blowing port C in the middle; the straight-line gas blowing port C is in communication with the gas connection nozzle C through the gas-electric connection pipe C; the straight-line gas blowing port C is used for removing metal slag generated during gas blowing in electric spark forming machining, so that the discharge performance between the electrode die C and the workpiece is good, the machining efficiency is high, and the quality is good;

[0017] 6. Bottom arc-shaped groove A processing, using the electric spark forming machining machine tool and the tool electrode C in step 5 of the fourth step to process the shell semi-finished product in step 3 to form the bottom arc-shaped groove A; the tool electrode C is arranged at the machine tool chuck of the electric spark forming machining machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining machine tool, the machining position is adjusted, electric spark forming machining is performed, and the shell semi-finished product is processed to have the bottom arc-shaped groove A at the bottom of the cylinder after machining;

[0018] 7. Bottom arc-shaped groove B processing, using the electric spark forming machining machine tool and the tool electrode C in step 5 of the fourth step to process the shell semi-finished product in step 3 to form the bottom arc-shaped groove B; the tool electrode C is arranged at the machine tool chuck of the electric spark forming machining machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining machine tool, the machining position is adjusted, electric spark forming machining is performed, and the shell semi-finished product is processed to have the bottom arc-shaped groove B at the bottom of the cylinder after machining;

[0019] 8. Bottom arc-shaped groove C processing, using the electric spark forming machining machine tool and the tool electrode C in step 5 of the fourth step to process the shell semi-finished product in step 3 to form the bottom arc-shaped groove C; the tool electrode C is arranged at the machine tool chuck of the electric spark forming machining machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining machine tool, the machining position is adjusted, electric spark forming machining is performed, and the shell semi-finished product is processed to have the bottom arc-shaped groove C at the bottom of the cylinder after machining;

[0020] 9. The processing of the bottom arc-shaped groove D, using an electric spark forming machine tool and the tool electrode C of step 5 in the fourth step to process the bottom arc-shaped groove D of the shell semi-finished product of step 3; the tool electrode C is arranged at the machine tool chuck of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the processing position is calibrated, the electric spark forming processing is performed, and the shell semi-finished product has the bottom arc-shaped groove D after processing.

[0021] 10. The design and structure of the tool electrode D; the tool electrode D comprises a tool electrode die D, a gas-electric connection pipe D, a gas connection nozzle D, a machine tool connection end D, a gas connection pipe, an electrode die body D, and a one-character gas blowing port D; the upper end of the gas-electric connection pipe D is provided with the machine tool connection end D, and the lower end is provided with the tool electrode die D; the machine tool connection end D is a cylindrical solid body with a diameter of 10-30 mm and a length of 20-40 mm; the machine tool connection end D is connected to the tool electrode die D through the gas-electric connection pipe D; the gas-electric connection pipe D is provided with the gas connection nozzle D for gas communication near the lower end of the machine tool connection end D; the gas connection nozzle D is connected to the gas connection pipe; the gas-electric connection pipe D is a hollow pipe with an L-shaped structure; the tool electrode die D comprises an electrode die body D and a one-character gas blowing port D; the electrode die body D is a cylindrical body provided with a one-character gas blowing port D in the middle; the one-character gas blowing port D is in communication with the gas connection nozzle D through the gas-electric connection pipe D; the one-character gas blowing port D is used for blowing away metal slag generated during electric spark forming processing, so that the discharge performance between the electrode die D and the workpiece is good, the processing efficiency is high, and the quality is good.

[0022] 11. The processing of the inner wall strip groove of the cylinder, using an electric spark forming machine tool and the tool electrode D of step 10 in the fourth step to process the inner wall strip groove of the cylinder of the shell semi-finished product of step 3; the tool electrode D is arranged at the machine tool chuck of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the processing position is calibrated, the electric spark forming processing is performed, and the shell semi-finished product has the inner wall strip groove of the cylinder after processing.

[0023] The above 1-11, after the electric spark forming processing is completed, an aviation hydraulic pump shell based on electric spark forming is obtained.

[0024] The above technical scheme has the effects of simplifying the structure of the hydraulic pump, improving the stability of the hydraulic pump, reducing the structural density, thereby reducing the self-weight, reducing the load, saving the flight driving energy, and saving the power energy;

[0025] The aviation hydraulic system has the advantages of high stability, long service life, energy saving, low failure rate, high production efficiency, long flight endurance, high flight efficiency, and promotion of the development of the aviation industry in China. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the structural diagram of the invention from two perspectives.

[0027] Figure 2 is the side view of the structure of the invention.

[0028] Figure 3 is the sectional view of A-A in Figure 2

[0029] Figure 4 is the enlarged view of part I. Figure 3

[0030] Figure 5 is the structural diagram of the shell blank.

[0031] Figure 6 is the sectional view of B-B in Figure 5

[0032] Figure 7 is the structural diagram of the semi-finished product after the initial processing of the shell blank.

[0033] Figure 8 is the sectional view of D-D in Figure 7

[0034] Figure 9 is the structural diagram of tool electrode A.

[0035] Figure 10 is the sectional view of R-R in Figure 9

[0036] Figure 11 is the processing diagram of the reset spring hole seat.

[0037] Figure 12 is the structural diagram of tool electrode B.

[0038] Figure 13 is the sectional view of N-N in Figure 12

[0039] Figure 14 is the processing diagram of the control piston hole.

[0040] Figure 15 is the structural diagram of tool electrode C.

[0041] Figure 16 is the sectional view of L-L in Figure 15

[0042] Figure 17 is the processing diagram of the shell bottom arc-shaped groove B.

[0043] ​​​​​​​Figure 18 is a structural diagram of tool electrode D.

[0044] Figure 19 is a structural diagram of tool electrode D. Figure 18 is a sectional view of M-M of

[0045] Figure 20 is a processing schematic diagram of barrel wall strip groove.

[0046] Figure 21 is a combined structure diagram of prior art.

[0047] Figure 22 is a sectional view of G-G in Figure 21

[0048] Figure 1 in which 1-A is a rear side perspective view of the present application; 1-B is a front side perspective view of the present application.

[0049] Figure 5 in which 5-A is a front side perspective view of the shell blank; 5-B is a rear side perspective view of the shell blank; 5-C is a left side view of the shell blank.

[0050] Figure 7 in which 7-A is a front side perspective view of the semi-finished product after initial processing of the shell blank; 7-B is a left side view of the semi-finished product after initial processing of the shell blank.

[0051] In the figure, 1. barrel wall; 2. flange; 3. mounting boss; 4. mounting screw hole; 5. transmission shaft hole; 6. shaft hole boss; 7. barrel bottom; 8. flange hole; 9. hydraulic control cylinder body; 10. control liquid channel; 11. bottom arc-shaped groove A; 12. bottom arc-shaped groove B; 13. bottom arc-shaped groove C; 14. bottom arc-shaped groove D; 15. milling port; 16. barrel inner wall strip groove; 17. control reset spring seat hole; 18. control piston hole; 19. machine tool chuck; 51. suspension hole; 52. bearing seat hole; 53. retainer groove.

[0052] In the figure, M1. barrel wall M; M2. flange M; M3. mounting boss M; M6. shaft hole boss M; M7. barrel bottom M; M9. hydraulic control cylinder body M.

[0053] In the figure, T1-1. tool electrode die A; T1-2. gas-electric connection pipe A; T1-3. gas connection nozzle A; T1-4. machine tool connection end A; T44. gas connection pipe; T1-11. electrode die body A; T1-12. fan-shaped gas blowing port A.

[0054] ​In the figure, T2-1. Tool electrode die head B; T2-21. Gas-electric connection straight pipe B; T2-22. Gas-electric connection elbow pipe B; T2-3. Gas connection nozzle B; T2-4. Machine tool connection end B; T44. Gas connection pipe B; T2-5. Straight-through blowing port B; T2-11. Electrode die head body B; T2-12. Fan-shaped blowing port B.

[0055] In the figure, T3-1. Tool electrode die head C; T3-2. Gas-electric connection pipe C; T3-3. Gas connection nozzle C; T3-4. Machine tool connection end C; T44. Gas connection pipe; T3-11. Electrode die head body C; T3-12. One-character blowing port C.

[0056] In the figure, T4-1. Tool electrode die head D; T4-2. Gas-electric connection pipe D; T4-3. Gas connection nozzle D; T4-4. Machine tool connection end D; T44. Gas connection pipe; T4-11. Electrode die head body D; T4-12. One-character blowing port D.

[0057] In the figure, x1. X shell cylinder body; x2. X shell bottom body; x1-1. X control hydraulic hole; x1-2. X control piston hole; x1-3. X combined flange a; x1-4. X cylinder wall body; x1-5. X cover flange; x2-1. X reset spring seat hole; x2-2. X shell bottom wall; x2-3. X transmission shaft hole; x2-4. X shell bottom wall body; x2-5. X combined flange b. DETAILED DESCRIPTION

[0058] The application will be further described below according to the accompanying drawings and specific embodiments.

[0059] Embodiment one.

[0060] First step, simplified structure and its characteristics;

[0061] In Figure 1 , Figure 2 The hydraulic pump shell manufactured based on the electric spark forming includes a cylinder wall (1), a flange (2), a mounting convex column (3), a mounting screw hole (4), a transmission shaft hole (5), a shaft hole boss (6), a cylinder bottom (7), a flange hole (8), a hydraulic control cylinder body (9), a control liquid channel (10), a bottom arc-shaped groove A (11), a bottom arc-shaped groove B (12), a bottom arc-shaped groove C (13), a bottom arc-shaped groove D (14), a milling port (15), a cylinder inner wall strip groove (16), a control reset spring seat hole (17), and a control piston hole (18); the cylinder wall (1) is provided with the cylinder inner wall strip groove (16); the cylinder bottom (7) is provided with the bottom arc-shaped groove A (11), the bottom arc-shaped groove B (12), the bottom arc-shaped groove C (13), and the bottom arc-shaped groove D (14).

[0062] InFigure 2 、 Figure 3 、 Figure 4 In the barrel wall (1), the barrel bottom (7) is integrated, the barrel wall (1) is provided with a protruding hydraulic control cylinder (9), the hydraulic control cylinder (9) is provided with a through hole control liquid channel (10) and a control piston hole (18); the control liquid channel (10) and the control piston hole (18) are on the same axis, the control liquid channel (10) is on the outer end, and the control piston hole (18) is on the inner end; the inner diameter of the control liquid channel (10) is smaller than that of the control piston hole (18);

[0063] At the intersection of the barrel wall (1) and the barrel bottom (7), a control reset spring seat hole (17) is arranged, and the control reset spring seat hole (17) is on the same axis as the control liquid channel (10) and the control piston hole (18);

[0064] There is a milled opening (15) between the control reset spring seat hole (17) and the control piston hole (18), and the milled opening (15) is cut by the hydraulic control cylinder (9);

[0065] Three to six protruding mounting convex columns (3) are arranged on the lower part of the barrel wall (1), and mounting screw holes (4) are arranged in the mounting convex columns (3);

[0066] Around the transmission shaft hole (5) of the inner wall of the barrel bottom (7), a first circle is provided with a bottom arc-shaped groove A (11), a second circle is provided with a bottom arc-shaped groove B (12), a third circle is provided with a bottom arc-shaped groove C (13), and a fourth circle is provided with a bottom arc-shaped groove D (14); the groove width of the bottom arc-shaped groove A (11), the bottom arc-shaped groove B (12), the bottom arc-shaped groove C (13) and the bottom arc-shaped groove D (14) is 10-20mm, the groove depth is 0.2-0.5 times the wall thickness of the barrel bottom (7), and the two ends of the groove are arc-shaped; the first circle is provided with three to six bottom arc-shaped grooves A (11), and the mutual distance is 5-15mm; the second circle is provided with three to six bottom arc-shaped grooves B (12), and the mutual distance is 5-15mm; the third circle is provided with three to six bottom arc-shaped grooves C (13), and the mutual distance is 5-15mm; the fourth circle is provided with three to six bottom arc-shaped grooves D (14), and the mutual distance is 5-15mm;

[0067] The inner wall of the barrel wall (1) is uniformly provided with a barrel inner wall strip groove (16), the groove width of the barrel inner wall strip groove (16) is 8-18mm, the groove length is 20-40mm, and the groove depth is 0.2-0.5 times the wall thickness; the two ends of the barrel inner wall strip groove (16) are semicircular arc-shaped;

[0068] The distance between the barrel inner wall strip grooves (16) is 5-15mm;

[0069] Second step, structure of the shell blank;

[0070] In Figure 5 , Figure 6 , the aeronautical hydraulic pump shell blank comprises a cylinder wall M (M1), a flange M (M2), a mounting protrusion M (M3), a shaft hole boss M (M6), a cylinder bottom M (M7), and a hydraulic control cylinder body M (M9); the port of the cylinder wall M (M1) is provided with the flange M (M2), and the bottom is provided with four protruding mounting protrusions M (M3) uniformly distributed; the outer middle part of the cylinder bottom M (M7) is provided with the shaft hole boss M (M6);

[0071] Step 3, initial processing of the shell blank;

[0072] In Figure 7 , Figure 8 , a flange hole (8) is processed at the flange M (M2) of the shell blank; mounting screw holes (4) are processed at the centers of 3-6 protruding mounting protrusions M (M3); a transmission shaft hole (5) is processed at the shaft hole boss M (M6); a control liquid channel (10) is processed at the center of the hydraulic control cylinder body M (M9); a milling port (15) is processed at the middle and lower part of the hydraulic control cylinder body M (M9); and a shell semi-finished product is prepared;

[0073] Step 4, electric spark forming processing;

[0074] 1. Design and structure of tool electrode A; in Figure 9 , Figure 10In the tool electrode A, the tool electrode die head A (T1-1), the gas-electric connection pipe A (T1-2), the gas connection nozzle A (T1-3), the machine tool connection end A (T1-4), the gas connection pipe (T44), the electrode die head body A (T1-11), the fan-shaped gas blowing port A (T1-12) are included; the upper end of the gas-electric connection pipe A (T1-2) is provided with the machine tool connection end A (T1-4), and the lower end is provided with the tool electrode die head A (T1-1); the machine tool connection end A (T1-4) is a cylindrical solid body, with a diameter of 10-20mm and a length of 20-40mm; the machine tool connection end A (T1-4) is connected to the tool electrode die head A (T1-1) through the gas-electric connection pipe A (T1-2), and the gas-electric connection pipe A (T1-2) is provided with the gas connection nozzle A (T1-3) below the machine tool connection end A (T1-4); the gas connection nozzle A (T1-3) is connected with the gas connection pipe (T44); the gas-electric connection pipe A (T1-2) is a hollow pipe, with a shape of vertical-horizontal-vertical; the tool electrode die head A (T1-1) includes the electrode die head body A (T1-11) and the fan-shaped gas blowing port A (T1-12); the electrode die head body A (T1-11) is a cylindrical body with a diameter of 10-20mm, and four fan-shaped gas blowing ports A (T1-12) are arranged in the middle; the four fan-shaped gas blowing ports A (T1-12) are in communication with the gas connection nozzle A (T1-3) through the gas-electric connection pipe A (T1-2); the four fan-shaped gas blowing ports A (T1-12) are used for blowing the metal slag generated during electric spark forming machining, so that the discharge performance between the electrode die head A (T1-1) and the workpiece is good, the machining efficiency is high, and the quality is good;

[0075] 2. Control the machining of the reset spring hole seat (17), use the electric spark forming machining machine tool and the tool electrode A of 1 in the fourth step to machine the shell semi-finished product of the third step to control the reset spring hole seat (17);

[0076] In Figure 11 , the tool electrode A is arranged at the machine tool chuck (19) of the electric spark forming machining machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machining machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die head A (T1-1) at the milling opening (15) below the hydraulic control cylinder body (9), and the solid body below the milling opening (15) is electric spark forming machined; after machining, the lower part of the milling opening (15) of the shell semi-finished product has the control reset spring seat hole seat (17);

[0077] 3. Design and structure of tool electrode B; in Figure 12 , Figure 13In the tool electrode B, the tool electrode die head B (T2-1), the gas-electric connection straight pipe B (T2-21), the gas-electric connection elbow pipe B (T2-22), the gas connection nozzle B (T2-3), the machine tool connection end B (T2-4), the gas connection pipe (T44), the straight-through gas blowing port B (T2-5), the electrode die head body B (T2-11), and the fan-shaped gas blowing port B (T2-12) are included. The machine tool connection end B (T2-4) is provided at the upper end of the gas-electric connection straight pipe B (T2-21) and at the lower end of the straight-through gas blowing port B (T2-5). The gas-electric connection elbow pipe B (T2-22) is provided laterally at the upper part of the straight-through gas blowing port B (T2-5). The tool electrode die head B (T2-1) is provided at the upper end of the gas-electric connection elbow pipe B (T2-22). The machine tool connection end B (T2-4) is a cylindrical solid body with a diameter of 10-20 mm and a length of 20-40 mm. The gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22) are provided between the machine tool connection end B (T2-4) and the tool electrode die head B (T2-1). The gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22) are hollow pipes. The gas connection nozzle B (T2-3) is provided on the gas-electric connection straight pipe B (T2-21) near the machine tool connection end B (T2-4) and is connected to the gas connection pipe (T44). The tool electrode die head B (T2-1) includes the electrode die head body B (T2-11) and the fan-shaped gas blowing port B (T2-12). The electrode die head body B (T2-11) is a cylindrical body with a diameter of 10-20 mm and four fan-shaped gas blowing ports B (T2-12) provided in the middle. The four fan-shaped gas blowing ports B (T2-12) are in communication with the gas connection nozzle B (T2-3) through the gas-electric connection straight pipe B (T2-21). The gas connection nozzle B (T2-3) is in communication with the straight-through gas blowing port B (T2-5) and the four fan-shaped gas blowing ports B (T2-12) through the gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22). The four fan-shaped gas blowing ports B (T2-12) are used to blow away metal slag generated during electric spark forming machining, thereby improving the discharge performance between the electrode die head B (T2-1) and the workpiece, increasing the machining efficiency, and improving the quality.

[0078] 4. Controlling the machining of the piston hole (18) by using the electric spark forming machining machine tool and the tool electrode B of 3 in the fourth step to machine the shell semi-finished product of the third step to control the piston hole (18).

[0079] In Figure 14In the fourth step, the tool electrode B is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die B (T2-1) at the milling opening (15) below the hydraulic control cylinder (9), and the hydraulic control cylinder (9) on the milling opening (15) is subjected to electric spark forming machining; after machining, the hydraulic control cylinder (9) on the milling opening (15) of the shell semi-finished product has a control piston hole (18), and the control piston hole (18) is coaxial with the control liquid channel (10);

[0080] 5. Design and structure of the tool electrode C; in Figure 15 、 Figure 16 In the fourth step, the tool electrode B is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die B (T2-1) at the milling opening (15) below the hydraulic control cylinder (9), and the hydraulic control cylinder (9) on the milling opening (15) is subjected to electric spark forming machining; after machining, the hydraulic control cylinder (9) on the milling opening (15) of the shell semi-finished product has a control piston hole (18), and the control piston hole (18) is coaxial with the control liquid channel (10);

[0081] 6. Machining of the bottom arc-shaped groove A (11), the electric spark forming machine tool and the tool electrode C of the fourth step are used to machine the bottom arc-shaped groove A (11) of the shell semi-finished product of the third step;

[0082] In the fourth step, the tool electrode B is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die B (T2-1) at the milling opening (15) below the hydraulic control cylinder (9), and the hydraulic control cylinder (9) on the milling opening (15) is subjected to electric spark forming machining; after machining, the hydraulic control cylinder (9) on the milling opening (15) of the shell semi-finished product has a control piston hole (18), and the control piston hole (18) is coaxial with the control liquid channel (10); Figure 17In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 3-6 bottom arc grooves A (11) around a radius of 50-70 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves A (11); the groove width of the bottom arc grooves A (11) is 10-20 mm, the groove depth is 0.2-0.5 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0083] 7. Bottom arc groove B (12) processing, using the electro-discharge forming machine tool and the tool electrode C of 5 in the fourth step to process the bottom arc groove B (12) of the shell semi-finished product of the third step;

[0084] In Figure 17 In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 3-6 bottom arc grooves A (11) around a radius of 50-70 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves A (11); the groove width of the bottom arc grooves A (11) is 10-20 mm, the groove depth is 0.2-0.5 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0085] 8. Bottom arc groove C (13) processing, using the electro-discharge forming machine tool and the tool electrode C of 5 in the fourth step to process the bottom arc groove C (13) of the shell semi-finished product of the third step;

[0086] In Figure 17 In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 3-6 bottom arc grooves A (11) around a radius of 50-70 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves A (11); the groove width of the bottom arc grooves A (11) is 10-20 mm, the groove depth is 0.2-0.5 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0087] 9. The processing of the bottom arc-shaped groove D (14) is processed by using the electric spark forming machine tool and the tool electrode C of the fifth step 5 to process the bottom arc-shaped groove D (14) of the shell semi-finished product of the third step;

[0088] In the Figure 17 , the tool electrode D is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the processing position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) process 3-6 bottom arc-shaped grooves D (14) in the cylinder wall (1) and above the cylinder bottom (7) around the radius of 140-160 mm with the center of the transmission shaft hole (5) as the center; After processing, the cylinder bottom (7) of the shell semi-finished product has the bottom arc-shaped groove D (14); the groove width of the bottom arc-shaped groove D (14) is 10-20 mm, the groove depth is 0.2-0.5 times of the wall thickness of the cylinder bottom (7), and the two ends of the groove are both semicircular arc shapes;

[0089] 10. Design and structure of tool electrode D; in Figure 18 , Figure 19 , the tool electrode D includes a tool electrode die D (T4-1), a gas-electric connection pipe D (T4-2), a gas connection nozzle D (T4-3), a machine tool connection end D (T4-4), a gas connection pipe (T44), an electrode die body D (T4-11), and a one-character gas blowing port D (T4-12); the upper end of the gas-electric connection pipe D (T4-2) is provided with the machine tool connection end D (T4-4), and the lower end is provided with the tool electrode die D (T4-1); the machine tool connection end D (T4-4) is a cylindrical solid body with a diameter of 10-20 mm and a length of 20-40 mm; the machine tool connection end D (T4-4) downward to the tool electrode die D (T4-1) is the gas-electric connection pipe D (T4-2), a gas connection nozzle D (T4-3) is arranged on the gas-electric connection pipe D (T4-2) near the lower machine tool connection end D (T4-4), the gas connection nozzle D (T4-3) is connected with the gas connection pipe (T44), the gas-electric connection pipe D (T4-2) is a hollow pipe with an L-shaped shape; the tool electrode die D (T4-1) includes an electrode die body D (T4-11) and a one-character gas blowing port D (T4-12); the electrode die body D (T4-11) is a cylindrical body with a diameter of 10-20 mm, and a one-character gas blowing port D (T4-12) is arranged in the middle; the width of the one-character gas blowing port D (T4-12) is 3-5 mm and the length is 8-16 mm; the one-character gas blowing port D (T4-12) is in communication with the gas connection nozzle D through the gas-electric connection pipe D (T4-2); the one-character gas blowing port D (T4-12) is used for blowing the metal slag generated during electric spark forming processing, so that the discharge performance between the electrode die D (T4-1) and the workpiece is good, the processing efficiency is high, and the quality is good;

[0090] 11. The processing of the inner wall strip groove (16) of the cylinder, using an electric spark forming machine tool and the tool electrode D of 10 in the fourth step to process the inner wall strip groove (16) of the shell semi-finished product of the third step;

[0091] In Figure 20 , the tool electrode D is arranged at the machine tool chuck (19) of the electric spark forming machine tool, and the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool. After the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die D (T4-1) in the cylinder wall (1). The inner wall of the cylinder wall (1) is processed to have the inner wall strip groove (16) of the cylinder. After processing, the cylinder wall (1) of the shell semi-finished product has the inner wall strip groove (16) of the cylinder. The groove width of the inner wall strip groove (16) is 10-20mm, the groove depth is 0.2-0.5 times the wall thickness of the cylinder wall (1), and the two ends of the groove are semicircular arcs.

[0092] The above 1-11, after the electric spark forming processing is completed, a kind of aviation hydraulic pump shell based on electric spark forming manufacturing of the present application is obtained.

[0093] Example two.

[0094] First step, simplified structure and its characteristics;

[0095] In Figure 1 , Figure 2 , the hydraulic pump shell based on electric spark forming manufacturing includes a cylinder wall (1), a flange (2), a mounting convex column (3), a mounting screw hole (4), a transmission shaft hole (5), a shaft hole boss (6), a cylinder bottom (7), a flange hole (8), a hydraulic control cylinder body (9), a control liquid channel (10), a bottom arc groove A (11), a bottom arc groove B (12), a bottom arc groove C (13), a bottom arc groove D (14), a milling port (15), an inner wall strip groove (16) of the cylinder, a control return spring seat hole (17), and a control piston hole (18). The inner wall of the cylinder wall (1) is provided with the inner wall strip groove (16) of the cylinder. The inner wall of the cylinder bottom (7) is provided with the bottom arc groove A (11), the bottom arc groove B (12), the bottom arc groove C (13), and the bottom arc groove D (14).

[0096] In Figure 2 , Figure 3 , Figure 4 , the cylinder wall (1) and the cylinder bottom (7) are integrated. The hydraulic control cylinder body (9) is protruded in the cylinder wall (1). The through hole control liquid channel (10) and the control piston hole (18) are arranged in the hydraulic control cylinder body (9). The control liquid channel (10) and the control piston hole (18) are on the same axis. The control liquid channel (10) is at the outer end, and the control piston hole (18) is at the inner end. The inner diameter of the control liquid channel (10) is smaller than that of the control piston hole (18).

[0097] At the intersection of the cylinder wall (1) and the cylinder bottom (7), a control reset spring seat hole (17) is arranged, which is coaxial with the control liquid channel (10) and the control piston hole (18);

[0098] There is a milling opening (15) between the control reset spring seat hole (17) and the control piston hole (18), which is cut by the hydraulic control cylinder body (9);

[0099] Four to eight protruding mounting protrusions (3) are arranged on the lower part of the cylinder wall (1), and mounting screw holes (4) are arranged in the mounting protrusions (3);

[0100] Around the transmission shaft hole (5) of the inner wall of the cylinder bottom (7), a first circle of bottom arc-shaped grooves A (11) is arranged, a second circle of bottom arc-shaped grooves B (12) is arranged, a third circle of bottom arc-shaped grooves C (13) is arranged, and a fourth circle of bottom arc-shaped grooves D (14) is arranged; the groove width of the bottom arc-shaped grooves A (11), the bottom arc-shaped grooves B (12), the bottom arc-shaped grooves C (13), and the bottom arc-shaped grooves D (14) is 15-30mm, the groove depth is 0.25-0.75 times the wall thickness of the cylinder bottom (7), and the two ends of the groove are arc-shaped; the first circle is provided with 4-8 bottom arc-shaped grooves A (11), and the mutual distance is 10-20mm; the second circle is provided with 4-8 bottom arc-shaped grooves B (12), and the mutual distance is 10-20mm; the third circle is provided with 4-8 bottom arc-shaped grooves C (13), and the mutual distance is 10-20mm; the fourth circle is provided with 4-8 bottom arc-shaped grooves D (14), and the mutual distance is 10-20mm;

[0101] The inner wall of the cylinder wall (1) is evenly distributed with cylinder inner wall strip grooves (16), the groove width of the cylinder inner wall strip grooves (16) is 12-28mm, the groove length is 30-60mm, and the groove depth is 0.25-0.75 times the wall thickness; the two ends of the cylinder inner wall strip grooves (16) are semicircular arc-shaped;

[0102] The mutual distance of the cylinder inner wall strip grooves (16) is 10-20mm;

[0103] Second step, the structure of the shell blank;

[0104] In Figure 5 , Figure 6 , the aviation hydraulic pump shell blank includes a cylinder wall M (M1), a flange M (M2), a mounting protrusion M (M3), a shaft hole boss M (M6), a cylinder bottom M (M7), and a hydraulic control cylinder body M (M9); the port of the cylinder wall M (M1) is provided with the flange M (M2), and the bottom is evenly provided with four protruding mounting protrusions M (M3); the outer middle part of the cylinder bottom M (M7) is provided with the shaft hole boss M (M6).

[0105] The third step is the initial processing of the shell blank;

[0106] exist Figure 7 , Figure 8 In the process, flange holes (8) are machined at flange M (M2) of the shell blank; mounting screw holes (4) are machined at the center of 4-8 protruding mounting bosses M (M3); drive shaft holes (5) are machined at shaft hole boss M (M6); control fluid passages (10) are machined at the center of hydraulic control cylinder M (M9); milling openings (15) are machined in the lower middle part of hydraulic control cylinder M (M9); thus, a shell semi-finished product is obtained.

[0107] The fourth step is electrical discharge machining (EDM).

[0108] 1. Design and construction of tool electrode A; in Figure 9 , Figure 10 In this process, the tool electrode A includes a tool electrode die A (T1-1), a pneumatic-electric connection pipe A (T1-2), an air inlet A (T1-3), a machine tool connection end A (T1-4), an air inlet pipe (T44), an electrode die body A (T1-11), and a fan-shaped air outlet A (T1-12). The upper end of the pneumatic-electric connection pipe A (T1-2) is provided with the machine tool connection end A (T1-4), and the lower end is provided with the tool electrode die A (T1-1). The machine tool connection end A (T1-4) is a cylindrical solid with a diameter of 15-30mm and a length of 20-40mm. The pneumatic-electric connection pipe A (T1-2) extends from the machine tool connection end A (T1-4) down to the tool electrode die A (T1-1). An air inlet pipe A (T1-3) is provided on the pneumatic-electric connection pipe A (T1-2) near the machine tool connection end A (T1-4). T1-3), the air inlet A (T1-3) is connected to the air inlet pipe (T44); the pneumatic-electric connection pipe A (T1-2) is a hollow pipe with a vertical-horizontal-vertical shape; the tool electrode die A (T1-1) includes an electrode die body A (T1-11) and fan-shaped air inlets A (T1-12). The electrode die body A (T1-11) is a cylinder with a diameter of 15-30mm, and has four fan-shaped air inlets A (T1-12) in the middle. The four fan-shaped air inlets A (T1-12) are all connected to the air inlet A (T1-3) through the pneumatic-electric connection pipe A (T1-2); the four fan-shaped air inlets A (T1-12) are used to handle the metal slag particles generated by air blowing during EDM, thereby ensuring good discharge performance between the electrode die A (T1-1) and the workpiece, high processing efficiency, and good quality;

[0109] 2. To control the machining of the reset spring hole seat (17), an electrical discharge machining machine tool and the tool electrode A in step 4 are used to process the shell semi-finished product in step 3 to control the reset spring hole seat (17).

[0110] In Figure 11 the tool electrode A is arranged at the machine chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine chuck (19) is operated to make the tool electrode die A (T1-1) at the milling opening (15) under the hydraulic control cylinder (9) to perform electro-discharge forming machining on the entity under the milling opening (15); and after machining, the milling opening (15) lower part of the shell semi-finished product has a controlled reset spring seat hole seat (17);

[0111] 3. Design and structure of the tool electrode B; in Figure 12 , Figure 13In the tool electrode B, the tool electrode die head B (T2-1), the gas-electric connection straight pipe B (T2-21), the gas-electric connection elbow pipe B (T2-22), the gas connection nozzle B (T2-3), the machine tool connection end B (T2-4), the gas connection pipe (T44), the straight-through gas blowing port B (T2-5), the electrode die head body B (T2-11), and the fan-shaped gas blowing port B (T2-12) are included. The machine tool connection end B (T2-4) is provided at the upper end of the gas-electric connection straight pipe B (T2-21) and at the lower end of the straight-through gas blowing port B (T2-5). The gas-electric connection elbow pipe B (T2-22) is provided laterally at the upper part of the straight-through gas blowing port B (T2-5). The tool electrode die head B (T2-1) is provided at the upper end of the gas-electric connection elbow pipe B (T2-22). The machine tool connection end B (T2-4) is a cylindrical solid body with a diameter of 15-30 mm and a length of 20-40 mm. The gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22) are provided between the machine tool connection end B (T2-4) and the tool electrode die head B (T2-1). The gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22) are hollow pipes. The gas connection nozzle B (T2-3) is provided on the gas-electric connection straight pipe B (T2-21) near the machine tool connection end B (T2-4) and is connected to the gas connection pipe (T44). The tool electrode die head B (T2-1) includes the electrode die head body B (T2-11) and the fan-shaped gas blowing port B (T2-12). The electrode die head body B (T2-11) is a cylindrical body with a diameter of 15-30 mm and four fan-shaped gas blowing ports B (T2-12) provided in the middle. The four fan-shaped gas blowing ports B (T2-12) are in communication with the gas connection nozzle B (T2-3) through the gas-electric connection straight pipe B (T2-21). The gas connection nozzle B (T2-3) is in communication with the straight-through gas blowing port B (T2-5) and the four fan-shaped gas blowing ports B (T2-12) through the gas-electric connection straight pipe B (T2-21) and the gas-electric connection elbow pipe B (T2-22). The four fan-shaped gas blowing ports B (T2-12) are used to blow away metal slag generated during electric spark forming machining, thereby improving the discharge performance between the electrode die head B (T2-1) and the workpiece, increasing the machining efficiency, and improving the quality.

[0112] 4. Controlling the machining of the piston hole (18) by using the electric spark forming machining machine tool and the tool electrode B of step 3 in the fourth step to machine the shell semi-finished product of step 3 to control the piston hole (18).

[0113] In Figure 14In the fourth step, the tool electrode B is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die B (T2-1) at the milling opening (15) below the hydraulic control cylinder (9), and the hydraulic control cylinder (9) on the milling opening (15) is subjected to electric spark forming machining; after machining, the hydraulic control cylinder (9) on the milling opening (15) of the shell semi-finished product has a control piston hole (18), and the control piston hole (18) is coaxial with the control liquid channel (10);

[0114] 5. Design and structure of the tool electrode C; in Figure 15 、 Figure 16 In the fourth step, the tool electrode B is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die B (T2-1) at the milling opening (15) below the hydraulic control cylinder (9), and the hydraulic control cylinder (9) on the milling opening (15) is subjected to electric spark forming machining; after machining, the hydraulic control cylinder (9) on the milling opening (15) of the shell semi-finished product has a control piston hole (18), and the control piston hole (18) is coaxial with the control liquid channel (10);

[0115] 6. Machining of the bottom arc-shaped groove A (11), the electric spark forming machine tool and the tool electrode C of the fourth step are used to machine the bottom arc-shaped groove A (11) of the shell semi-finished product of the third step;

[0116] In Figure 17In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 4-8 bottom arc grooves A (11) around a radius of 50-80 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves A (11); the groove width of the bottom arc grooves A (11) is 15-30 mm, the groove depth is 0.25-0.75 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0117] 7. Bottom arc groove B (12) machining, using the electro-discharge forming machine tool and the tool electrode C of 5 in the fourth step to machine the bottom arc groove B (12) of the shell semi-finished product of the third step;

[0118] In the fourth step, Figure 17 In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 4-8 bottom arc grooves B (12) around a radius of 90-120 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves B (12); the groove width of the bottom arc grooves B (12) is 15-30 mm, the groove depth is 0.25-0.75 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0119] 8. Bottom arc groove C (13) machining, using the electro-discharge forming machine tool and the tool electrode C of 5 in the fourth step to machine the bottom arc groove C (13) of the shell semi-finished product of the third step;

[0120] In the fourth step, Figure 17 In the fourth step, the tool electrode C is arranged at the machine tool chuck (19) of the electro-discharge forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electro-discharge forming machine tool, the machining position is aligned, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) in the cylinder wall (1) and above the cylinder bottom (7) to machine 4-8 bottom arc grooves C (13) around a radius of 130-160 mm with the center of the transmission shaft hole (5) as the center; after machining, the cylinder bottom (7) of the shell semi-finished product has the bottom arc grooves C (13); the groove width of the bottom arc grooves C (13) is 15-30 mm, the groove depth is 0.25-0.75 times the wall thickness of the cylinder bottom (7), and both ends of the groove are semicircular arc shapes;

[0121] 9. The processing of the bottom arc-shaped groove D (14) is processed by using the electric spark forming machine tool and the tool electrode C of the fifth step 5 to process the bottom arc-shaped groove D (14) of the shell semi-finished product of the third step;

[0122] In the Figure 17 , the tool electrode D is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the machining position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die C (T3-1) process 4-8 bottom arc-shaped grooves D (14) in the cylinder wall (1) and above the cylinder bottom (7) around the radius of 170-200 mm with the center of the transmission shaft hole (5) as the center; After processing, the cylinder bottom (7) of the shell semi-finished product has the bottom arc-shaped groove D (14); The groove width of the bottom arc-shaped groove D (14) is 15-30 mm, the groove depth is 0.25-0.75 times of the wall thickness of the cylinder bottom (7), and the two ends of the groove are both semicircular arc shapes;

[0123] 10. Design and structure of tool electrode D; in Figure 18 、 Figure 19 , the tool electrode D includes a tool electrode die D (T4-1), a gas-electric connection pipe D (T4-2), a gas connection nozzle D (T4-3), a machine tool connection end D (T4-4), a gas connection pipe (T44), an electrode die body D (T4-11), and a one-character gas blowing port D (T4-12); the upper end of the gas-electric connection pipe D (T4-2) is provided with the machine tool connection end D (T4-4), and the lower end is provided with the tool electrode die D (T4-1); the machine tool connection end D (T4-4) is a cylindrical solid, with a diameter of 15-30 mm and a length of 20-40 mm; the machine tool connection end D (T4-4) downward to the tool electrode die D (T4-1) is the gas-electric connection pipe D (T4-2), and a gas connection nozzle D (T4-3) for gas passage is arranged on the gas-electric connection pipe D (T4-2) near the lower machine tool connection end D (T4-4); the gas connection nozzle D (T4-3) is connected with the gas connection pipe (T44); the gas-electric connection pipe D (T4-2) is a hollow pipe and has an L-shaped shape; the tool electrode die D (T4-1) includes an electrode die body D (T4-11) and a one-character gas blowing port D (T4-12); the electrode die body D (T4-11) is a cylinder with a diameter of 15-30 mm, and a one-character gas blowing port D (T4-12) is arranged in the middle; the width of the one-character gas blowing port D (T4-12) is 4-6 mm and the length is 10-20 mm; the one-character gas blowing port D (T4-12) is in communication with the gas connection nozzle D through the gas-electric connection pipe D (T4-2); the one-character gas blowing port D (T4-12) is used for blowing the metal slag generated during electric spark forming machining, so that the discharge performance between the electrode die D (T4-1) and the workpiece is good, the processing efficiency is high, and the quality is good;

[0124] 11. The processing of the inner wall strip groove (16) of the cylinder, using an electric spark forming machine tool and the tool electrode D of 10 in the fourth step to process the inner wall strip groove (16) of the shell semi-finished product of the third step;

[0125] In Figure 20 , the tool electrode D is arranged at the machine tool chuck (19) of the electric spark forming machine tool, the shell semi-finished product is arranged on the workpiece seat of the electric spark forming machine tool, the processing position is calibrated, the machine tool chuck (19) is operated to make the tool electrode die D (T4-1) in the cylinder wall (1), and the inner wall of the cylinder wall (1) is processed to have the inner wall strip groove (16) of the cylinder. After processing, the cylinder wall (1) of the shell semi-finished product has the inner wall strip groove (16) of the cylinder; the groove width of the inner wall strip groove (16) is 15-30 mm, the groove depth is 0.25-0.75 times the wall thickness of the cylinder wall (1), and the two ends of the groove are semicircular arcs.

[0126] The above 1-11, after the electric spark forming processing is completed, a kind of aviation hydraulic pump shell based on electric spark forming manufacturing of the present application is obtained.

[0127] The present application is compared with prior art:

[0128] In Figure 21 , Figure 22 , the aviation hydraulic pump shell of the prior art is composed of X shell cylinder (x1) and X shell bottom body (x2), wherein (x1) includes X control hydraulic hole (x1-1), X control piston hole (x1-2), X combined flange a (x1-3), X cylinder wall body (x1-4) and X cover flange (x1-5); (x2) includes X reset spring seat hole (x2-1), X shell bottom wall (x2-2), X transmission shaft hole (x2-3), X shell bottom wall body (x2-4) and X combined flange b (x2-5);

[0129] The difference between the aviation hydraulic pump shell based on electric spark forming manufacturing of the present application and the aviation hydraulic pump shell of the prior art;

[0130] 1. The present application is an independent integrated structure component; the structure of the prior art is composed of two components;

[0131] 2. The cylinder wall (1) of the present application is provided with the inner wall strip groove (16) of the cylinder; the X cylinder wall body (x1-4) of the X shell cylinder (x1) and the X shell bottom wall body (x2-4) of the X shell bottom body (x2) of the prior art are solid;

[0132] 3. The bottom (7) of the present application is provided with bottom arc-shaped groove A (11), bottom arc-shaped groove B (12), bottom arc-shaped groove C (13) and bottom arc-shaped groove D (14);

[0133] The application simplifies the structure of the hydraulic pump, improves the stability of the hydraulic pump, reduces the structural density, reduces the self-weight and load, saves the flight driving energy and power energy.

[0134] The application has the advantages of improving the stability of the aviation hydraulic system, improving the quality and service life of the aviation hydraulic pump, saving energy and reducing consumption of the aviation aircraft, reducing the failure rate, improving the production efficiency of the aviation hydraulic system, improving the flight endurance and flight efficiency of the aircraft, and promoting the progress of aviation technology in China.

Claims

1. A tool electrode for manufacturing a hydraulic pump shell, the hydraulic pump shell comprising a cylinder wall (1), a flange (2), a mounting boss (3), a mounting screw hole (4), a transmission shaft hole (5), a shaft hole boss (6), a cylinder bottom (7), a flange hole (8), a hydraulic control cylinder (9), a control fluid passage (10), a bottom arc slot A (11), a bottom arc slot B (12), a bottom arc slot C (13), a bottom arc slot D (14), a milling port (15), a cylinder inner wall strip groove (16), a control return spring seat hole (17), a control piston hole (18); characterized in that: The inner wall of the barrel wall (1) is provided with a barrel inner wall groove (16); the inner wall of the barrel bottom (7) is provided with a bottom arc-shaped groove A (11), a bottom arc-shaped groove B (12), a bottom arc-shaped groove C (13), and a bottom arc-shaped groove D (14); The tool electrode includes a tool electrode A for machining the control reset spring seat hole (17); the tool electrode A includes a tool electrode die head A (T1-1), an air-electric connection pipe A (T1-2), an air connection nozzle A (T1-3), a machine tool connection end A (T1-4), and an air connection pipe (T44); the upper end of the air-electric connection pipe A (T1-2) is provided with the machine tool connection end A (T1-4), and the lower end is provided with the tool electrode die head A (T1-1); the air-electric connection pipe A (T1-2) below the machine tool connection end A (T1-4) is provided with the air connection nozzle A (T1-3) for air communication, and the air connection nozzle A (T1-3) is connected with the air connection pipe (T44); The tool electrode further includes a tool electrode B for machining the control piston hole (18); the tool electrode B includes a tool electrode die head B (T2-1), an air-electric connection straight pipe B (T2-21), an air-electric connection elbow pipe B (T2-22), an air connection nozzle B (T2-3), a machine tool connection end B (T2-4), an air connection pipe (T44), a straight-through air blowing port B (T2-5), an electrode die head body B (T2-11), and a fan-shaped air blowing port B (T2-12); The upper end of the air-electric connection straight pipe B (T2-21) is provided with the machine tool connection end B (T2-4), and the lower end is provided with the straight-through air blowing port B (T2-5); the air-electric connection elbow pipe B (T2-22) is laterally arranged on the upper part of the straight-through air blowing port B (T2-5); The upper end of the air-electric connection elbow pipe B (T2-22) is provided with the tool electrode die head B (T2-1); The machine tool connection end B (T2-4) is a cylindrical solid body with a diameter of 10-20 mm and a length of 20-40 mm; between the machine tool connection end B (T2-4) and the tool electrode die head B (T2-1), there are the air-electric connection straight pipe B (T2-21) and the air-electric connection elbow pipe B (T2-22), and the air-electric connection straight pipe B (T2-21) and the air-electric connection elbow pipe B (T2-22) are hollow pipes; the air-electric connection straight pipe B (T2-21) below the machine tool connection end B (T2-4) is provided with the air connection nozzle B (T2-3) for air communication, and the air connection nozzle B (T2-3) is connected with the air connection pipe (T44); The tool electrode die head B (T2-1) includes the electrode die head body B (T2-11) and the fan-shaped air blowing port B (T2-12); the electrode die head body B (T2-11) is a cylindrical body with a diameter of 10-20 mm and is provided with four fan-shaped air blowing ports B (T2-12) in the middle; the four fan-shaped air blowing ports B (T2-12) are all in communication with the air connection nozzle B (T2-3) through the air-electric connection straight pipe B (T2-21) and the air-electric connection elbow pipe B (T2-22); and the air connection nozzle B (T2-3) is in communication with the straight-through air blowing port B (T2-5) through the air-electric connection straight pipe B (T2-21).

2. A tool electrode for manufacturing a housing of a hydraulic pump according to claim 1, characterized in that: There is a milled mouth (15) between the control reset spring seat hole (17) and the control piston hole (18), which is cut by the hydraulic control cylinder (9).

3. A tool electrode for manufacturing a hydraulic pump housing according to claim 1, characterized in that: The lower part of the barrel wall (1) is provided with 3-6 protruding mounting columns (3), and the mounting columns (3) are provided with mounting screw holes (4).

4. The tool electrode for manufacturing a housing of a hydraulic pump according to claim 1, wherein: Around the transmission shaft hole (5) of the inner wall of the barrel bottom (7), the first circle is provided with a bottom arc-shaped groove A (11), the second circle is provided with a bottom arc-shaped groove B (12), the third circle is provided with a bottom arc-shaped groove C (13), and the fourth circle is provided with a bottom arc-shaped groove D (14); the groove width of the bottom arc-shaped groove A (11), the bottom arc-shaped groove B (12), the bottom arc-shaped groove C (13) and the bottom arc-shaped groove D (14) is 10-20mm, the groove depth is 0.2-0.5 times of the wall thickness of the barrel bottom (7), and the two ends of the groove are arc-shaped; the first circle is provided with 3-6 bottom arc-shaped grooves A (11), and the mutual distance is 5-15mm; the second circle is provided with 3-6 bottom arc-shaped grooves B (12), and the mutual distance is 5-15mm; the third circle is provided with 3-6 bottom arc-shaped grooves C (13), and the mutual distance is 5-15mm; the fourth circle is provided with 3-6 bottom arc-shaped grooves D (14), and the mutual distance is 5-15mm.

5. A tool electrode for manufacturing a hydraulic pump housing according to claim 1, characterized in that: The inner wall of the barrel wall (1) is uniformly distributed with barrel inner wall strip grooves (16), the groove width of the barrel inner wall strip grooves (16) is 8-18mm, the groove length is 20-40mm, and the groove depth is 0.2-0.5 times of the wall thickness; the two ends of the barrel inner wall strip grooves (16) are semicircular arc-shaped; the spacing of the barrel inner wall strip grooves (16) is 5-15mm.

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