Production process of electromagnetic control valve body casting for hydraulic component
By designing a complex runner structure and using technical means such as hollow core bones, horizontal core shooters and quartz sand spray guns, the problems of poor sealing and difficult casting of traditional control valves are solved, and high-quality valve body castings are achieved.
Patent Information
- Application Number
- CN202510392610.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-06-24
AI Technical Summary
The sealing properties of traditional control valves are poor, and due to the complex internal structure and the difficulty of casting, it is easy to cause problems such as bending of the main channel and air holes in the inner wall of the runner.
A production process of electromagnetically controlled valve body castings for hydraulic components is adopted. By designing sand cores with multiple longitudinal and arc-shaped runners, combining hollow core bones and horizontal core injection machines, the straightness of the main runner and no air holes in the inner wall of the runner are ensured. Use a spray gun with quartz sand to cooperate with the positioning member to ensure the inner wall of the runner is clean.
It solves the problems of poor sealing and difficult casting of traditional control valves, realizes high-quality production of valve body castings, and ensures the straightness of the main channel and the clean and hole-free flow path walls.
Smart Images
Figure CN120190310A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of valve body production, and particularly to a production process for electromagnetic control valve body castings for hydraulic components. Background Art
[0002] To meet the requirements of Chinese construction machinery products for the functions, stability, and automation control level of hydraulic systems, at the request of Shanghai Yutai Co., Ltd., the YT-DCF20 electro-hydraulic multi-functional control valve was independently developed for supporting the main engine factory. The project conforms to the content supported in the "High-tech Fields Supported by the State" and the "Guidelines for Key High-tech Industrialization Areas with Optimized Development at Present".
[0003] Traditional control valves are an integral control valve assembled from multiple wafer valves, which require the combination of several wafer valves. The YT-DCF20 uses multiple wafer valves to cast the oil passages uniformly. During use, it is necessary to solve the problem of poor sealing between traditional wafer valves; due to the integration of functions, a control valve is a multi-functional valve assembled from multiple wafer valves. Since the internal structure of the valve body is relatively complex, all oil passages must be connected, but in order to reduce the processing cost, the internal flow channels should be cast out all at once as much as possible, so the casting difficulty of the valve body blank of the product is increased, and a series of casting problems must be solved. Due to the special structure of the product, but there are many and relatively complex internal flow channels, and the runner cores are not easy to be demolded, so first of all, it is necessary to solve how to divide the mold and how to place the assembly interfaces between the cores. Summary of the Invention
[0004] In order to solve the above technical problems, the present invention proposes a production process for electromagnetic control valve body castings for hydraulic components, which is ingeniously designed, reasonably and compactly structured, solves the problem of the secondary shot core not being compacted; solves the problems of the main runner of the casting being bent and the inner wall of the runner having air holes.
[0005] The technical solution of the present invention: A production process for electromagnetic control valve body castings for hydraulic components. During the production of electromagnetic control valve body castings, according to the outer shape of the product, the cavity in the sand box is made, and then according to the runner structure of the product, large cores for the first longitudinal runner, the second longitudinal runner, the third longitudinal runner, the fourth longitudinal runner, the fifth longitudinal runner, the sixth longitudinal runner, the seventh longitudinal runner, the eighth longitudinal runner, and the ninth longitudinal runner and small cores for the matching vertical runners, horizontal runners, and arc-shaped runners and other runners are designed and manufactured. Then, the large core of the main runner and the small cores of the other runners are specified to be installed in the cavity of the sand box, the sand box is closed, and then the molten iron is poured from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and then the internal cores are cleaned and exported to complete the processing; A hollow core bone is longitudinally installed inside the large sand core, and several air holes are opened on the outer side of the hollow core bone; when the large sand core and some small sand cores are combined and processed, a horizontal core shooter is used to shoot sand from two directions. The electromagnetic control valve body casting includes a main body, a first longitudinal flow channel, a second longitudinal flow channel, a third longitudinal flow channel, a fourth longitudinal flow channel, a fifth longitudinal flow channel, a sixth longitudinal flow channel, a seventh longitudinal flow channel, an eighth longitudinal flow channel, a ninth longitudinal flow channel, a first arc-shaped flow channel, and a second arc-shaped flow channel. There are 8 flow ports designed on the front of the main body, namely the front first flow port, the front second flow port, the front third flow port, the front fourth flow port, the front fifth flow port, the front sixth flow port, the front seventh flow port, and the front eighth flow port. There are 8 flow ports designed on the back of the main body, namely the rear first flow port, the rear second flow port, the rear third flow port, the rear fourth flow port, the rear fifth flow port, the rear sixth flow port, the rear seventh flow port, and the rear eighth flow port. There are 5 flow ports designed on the bottom of the main body, namely the bottom first flow port, the bottom second flow port, the bottom third flow port, the bottom fourth flow port, and the bottom fifth flow port. There are 2 flow ports designed on the left side of the main body, namely the left first flow port and the left second flow port. There is 1 flow port designed on the right side of the main body, namely the right first flow port. There are seven longitudinal flow channels designed in the front and back of the middle of the main body, namely the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, the fifth longitudinal flow channel, the sixth longitudinal flow channel, the seventh longitudinal flow channel, the eighth longitudinal flow channel, and the ninth longitudinal flow channel. The first longitudinal flow channel is close to the leftmost side of the main body. The front end of the first longitudinal flow channel is connected to the front first flow port, and the rear end of the first longitudinal flow channel is connected to the rear first flow port. The second longitudinal flow channel and the third longitudinal flow channel are located on the right side of the first longitudinal flow channel, and the second longitudinal flow channel is located above the third longitudinal flow channel. The second longitudinal flow channel is successively designed with five annular grooves from front to back, namely the first annular groove, the second annular groove, the third annular groove, the fourth annular groove, and the fifth annular groove; the front end of the second longitudinal flow channel is connected to the front second flow port, and the rear end of the second longitudinal flow channel is connected to the rear second flow port. The rear end of the third longitudinal flow channel is connected to the rear third flow port, and the front end of the third longitudinal flow channel is designed to be blocked. The first arc-shaped flow channel is located above the second longitudinal flow channel, and the front end of the first arc-shaped flow channel is connected to the first annular groove. The rear end of the first arc-shaped flow channel is connected to the fifth annular groove. The front and rear ends of the first arc-shaped flow channel are also respectively connected to the front and rear ends of the second longitudinal flow channel near the mouth positions through an arc-shaped auxiliary flow channel; the lower end of the fourth annular groove is connected to the rear end of the third longitudinal flow channel near the mouth position through a vertical flow channel, and the lower end of the second annular groove is connected to the front end of the third longitudinal flow channel near the mouth position through a vertical flow channel. The third annular groove is connected to the right end of the first transverse flow channel through an L-shaped flow channel, and the left end of the first transverse flow channel is connected to the left first flow port. The front end of the first arc-shaped flow channel is connected to the right end of the second transverse flow channel, and the left end of the second transverse flow channel is connected to the left second flow port; The front end of the third longitudinal flow channel is connected to the next flow port through the first vertical flow channel; A fourth longitudinal flow channel is designed below the right lower part of the second longitudinal flow channel, and the fourth longitudinal flow channel is also located above the right upper part of the third longitudinal flow channel; The fourth longitudinal flow channel is successively designed with five annular grooves from front to back, namely the sixth annular groove, the seventh annular groove, the eighth annular groove, the ninth annular groove, the tenth annular groove, the eleventh annular groove, the twelfth annular groove, the thirteenth annular groove, the fourteenth annular groove; the front end of the fourth longitudinal flow channel is connected to the first three flow ports, and the rear end of the fourth longitudinal flow channel is connected to the last four flow ports; A second arc-shaped flow channel is designed on the left side of the fourth longitudinal flow channel. The front end of the second arc-shaped flow channel is connected to the sixth annular groove and the seventh annular groove through two auxiliary flow channels, and the rear end of the second arc-shaped flow channel is connected to the thirteenth annular groove and the fourteenth annular groove through two auxiliary flow channels, A third arc-shaped flow channel is designed on the right side of the fourth longitudinal flow channel. The front end of the third arc-shaped flow channel is connected to the eighth annular groove, the rear end of the third arc-shaped flow channel is connected to the twelfth annular groove, and the right sides of the thirteenth annular groove and the fourteenth annular groove are connected through a fourth arc-shaped flow channel, A second vertical flow channel is designed above the sixth annular groove and the seventh annular groove, and the lower end of the second vertical flow channel is connected to the sixth annular groove and the seventh annular groove respectively through two auxiliary flow channels. The right end of the second transverse flow channel is connected to the first arc-shaped flow channel and then extends to the right and is connected to the upper end of the second vertical flow channel; The right lower part of the right end of the fourth arc-shaped flow channel is connected to the lower second flow port through a vertical flow channel. The lower part of the right end of the third arc-shaped flow channel near the middle position is connected to the lower third flow port through a vertical flow channel, and the upper end of this vertical flow channel is also connected to the first five flow ports through a fifth longitudinal flow channel; A sixth longitudinal flow channel is designed above and to the left of the fifth longitudinal flow channel. The front end of the sixth longitudinal flow channel is connected to the first four flow ports, and the rear end of the sixth longitudinal flow channel is connected to the last five flow ports; Four annular grooves are successively designed on the sixth longitudinal flow channel near the middle position from front to back, namely the fifteenth annular groove, the sixteenth annular groove, the seventeenth annular groove, the eighteenth annular groove; the left sides of the fifteenth annular groove and the sixteenth annular groove are connected through a fifth arc-shaped flow channel, and the left side of the seventeenth annular groove is connected to the right side of the fourth annular groove through a transverse flow channel; A seventh longitudinal flow channel is arranged on the right side of the sixth longitudinal flow channel. The front end of the seventh longitudinal flow channel is connected to the first six flow ports, and the rear end of the seventh longitudinal flow channel is connected to the last six flow ports; Five annular grooves are successively designed on the seventh longitudinal flow channel from front to back, namely the nineteenth annular groove, the twentieth annular groove, the twenty-first annular groove, the twenty-second annular groove, the twenty-third annular groove; On the right side of the seventh longitudinal flow channel, a sixth arc-shaped flow channel is designed. The front and rear ends of the sixth arc-shaped flow channel are respectively connected to the right sides of the nineteenth annular groove and the twenty-third annular groove. Above the seventh longitudinal flow channel, a seventh arc-shaped flow channel is designed. The front and rear ends of the seventh arc-shaped flow channel are respectively connected to the positions near the mouth parts of the front and rear of the sixth longitudinal flow channel. The left side of the twenty-first annular groove is connected to the right side of the eighteenth annular groove through a Z-shaped flow channel. On the lower right side of the seventh longitudinal flow channel, an eighth longitudinal flow channel is designed. The front end of the eighth longitudinal flow channel is connected to the front seven flow ports, and the rear end of the eighth longitudinal flow channel is connected to the rear seven flow ports. Four annular grooves are successively designed on the upper part of the eighth longitudinal flow channel from front to back, namely the twenty-fourth annular groove, the twenty-fifth annular groove, the twenty-sixth annular groove, and the twenty-seventh annular groove. The left side of the twenty-fifth annular groove is connected to the lower end of the twentieth annular groove through an L-shaped flow channel, and the left side of the twenty-sixth annular groove is also connected to the lower end of the twenty-second annular groove through an L-shaped flow channel. On the right side of the eighth longitudinal flow channel, a ninth longitudinal flow channel is designed. The front end of the ninth longitudinal flow channel is connected to the front eight flow ports, and the rear end of the ninth longitudinal flow channel is connected to the rear eight flow ports. Five annular grooves are successively designed on the upper part of the ninth longitudinal flow channel from front to back, namely the twenty-eighth annular groove, the twenty-ninth annular groove, the thirtieth annular groove, the thirty-first annular groove, and the thirty-second annular groove. The left side of the thirtieth annular groove is connected to the twenty-fourth annular groove through a type of S-shaped flow channel, and the left side of the thirty-first annular groove is connected to the twenty-seventh annular groove through a type of S-shaped flow channel. Above the ninth longitudinal flow channel, an eighth arc-shaped flow channel and a ninth arc-shaped flow channel are successively arranged. The ninth arc-shaped flow channel is located above the eighth arc-shaped flow channel. The front end of the eighth arc-shaped flow channel is connected to the upper end of the twenty-eighth annular groove, and the rear end of the eighth arc-shaped flow channel is connected to the upper end of the thirty-second annular groove. The front and rear ends of the ninth arc-shaped flow channel are respectively connected to the positions near the mouth parts of the front and rear ends of the eighth longitudinal flow channel. The lower end of the twenty-ninth annular groove is connected to the lower four flow ports through a vertical flow channel, and the lower end of the thirty-second annular groove is connected to the lower five flow ports through a vertical flow channel. The rear end of the ninth arc-shaped flow channel is connected to the right one flow port through an L-shaped flow channel.
[0006] The material of the hollow core bone is rolled into a hollow tube shape with a 0.5-mm-thick iron sheet. The outer diameter is customized to be 4 mm, and the inner diameter is 3 mm. Twenty air holes with a diameter of 2 mm are evenly distributed on the outer side of the hollow core bone.
[0007] During the cleaning process of the internal sand core of the casting, a quartz sand spraying gun is used. The particle size of the sand is 50 - 100 mesh. The barrel head of the gun extends into the flow channel of the casting, and a specified positioning part is made at the interface position and clamped outside the casting flow port. The interface is positioned and sandblasted for 5 - 10 seconds.
[0008] The positioning part includes a positioning ring sleeve and a positioning screw. A threaded hole is radially opened on the outer side of the positioning ring sleeve, and the threaded hole is connected to the inner hole of the positioning ring sleeve. The positioning screw is rotatably installed in the threaded hole. The positioning ring sleeve is sleeved outside the barrel head of the gun, and the positioning screw rotates and presses against the outside of the barrel head for positioning.
[0009] The advantages of the present invention are ingenious design, perfect technology, reasonable and compact structure. In order to reduce the assembly interface, the sand core adopts the secondary sand shooting process. To solve the problem of insufficient compaction, a horizontal core shooter is used to shoot sand from two directions during the secondary sand shooting; the use of a hollow core bone can ensure that the main runner (longitudinal runner) does not bend and can effectively exhaust air to ensure that there are no air holes on the inner wall of the runner; the use of a sand blasting gun with a barrel head and a positioning part can effectively position the sand blasting position in the runner of the valve body casting to ensure that the runner structure is clear. Brief Description of the Drawings
[0010] Figure 1-2 are the front and rear top-down three-dimensional schematic diagrams of the present invention.
[0011] Figure 3-4 are the front-view different-angle bottom-up three-dimensional schematic diagrams of the present invention.
[0012] Figure 5 is the horizontal top-down cross-sectional view at the first transverse runner of the present invention.
[0013] Figure 6 is the horizontal top-down cross-sectional view at the second, sixth, and seventh longitudinal runners of the present invention.
[0014] Figure 7 is the horizontal top-down cross-sectional view at the first, fourth, fifth, eighth, and ninth longitudinal runners of the present invention.
[0015] Figure 8 is the horizontal top-down cross-sectional view at the third longitudinal runner of the present invention.
[0016] Figure 9 is the vertical side view cross-sectional view at the first longitudinal runner of the present invention.
[0017] Figure 10 is the vertical side view cross-sectional view at the second and third longitudinal runners of the present invention.
[0018] Figure 11 is the vertical side view cross-sectional view at the fourth longitudinal runner of the present invention.
[0019] Figure 12 is the vertical side view cross-sectional view at the sixth longitudinal runner of the present invention.
[0020] Figure 13 is the vertical side view cross-sectional view at the fifth longitudinal runner of the present invention.
[0021] Figure 14 is the vertical side view cross-sectional view at the seventh longitudinal runner of the present invention.
[0022] Figure 15 is the vertical side view cross-sectional view at the eighth longitudinal runner of the present invention.
[0023] Figure 16 It is a vertical side view sectional view at the ninth longitudinal flow channel of the present invention. Detailed implementation manners
[0024] Refer to the attached Figure 1-16 , a production process of an electromagnetic control valve body casting for a hydraulic component. During the production of the electromagnetic control valve body casting, a cavity in the sand box is made according to the product shape, and then large sand cores of the first longitudinal flow channel 11, the second longitudinal flow channel 12, the third longitudinal flow channel 13, the fourth longitudinal flow channel 14, the fifth longitudinal flow channel 15, the sixth longitudinal flow channel 16, the seventh longitudinal flow channel 17, the eighth longitudinal flow channel 18, and the ninth longitudinal flow channel 19 and small sand cores of the vertical flow channels, horizontal flow channels, arc-shaped flow channels and the remaining flow channels that match them are designed and manufactured according to the flow channel structure of the product. Then, the large sand core of the main flow channel and the small sand cores of the remaining flow channels are fixedly installed in the cavity of the sand box, the sand box is closed, and then the molten iron is poured from the reserved gating system. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and then the internal sand cores are cleaned and exported to complete the processing; A hollow core bone is longitudinally installed inside the large sand core, and a plurality of air holes are opened on the outer side of the hollow core bone; when the large sand core and some small sand cores are combined and processed, a horizontal core shooter is used to shoot sand from two directions; The electromagnetic control valve body casting includes a main body 1, a first longitudinal flow channel 11, a second longitudinal flow channel 12, a third longitudinal flow channel 13, a fourth longitudinal flow channel 14, a fifth longitudinal flow channel 15, a sixth longitudinal flow channel 16, a seventh longitudinal flow channel 17, an eighth longitudinal flow channel 18, a ninth longitudinal flow channel 19, a first arc-shaped flow channel 21, a second arc-shaped flow channel 22, a third arc-shaped flow channel 23, a fourth arc-shaped flow channel 24, a fifth arc-shaped flow channel 25, a sixth arc-shaped flow channel 26, a seventh arc-shaped flow channel 27, an eighth arc-shaped flow channel 28, and a ninth arc-shaped flow channel 29. There are 8 flow ports designed on the front of the main body 1, which are the front first flow port 31, the front second flow port 32, the front third flow port 33, the front fourth flow port 34, the front fifth flow port 35, the front sixth flow port 36, the front seventh flow port 37, and the front eighth flow port 38; There are 8 flow ports designed on the back of the main body 1, which are the rear first flow port 41, the rear second flow port 42, the rear third flow port 43, the rear fourth flow port 44, the rear fifth flow port 45, the rear sixth flow port 46, the rear seventh flow port 47, and the rear eighth flow port 48; There are 5 flow ports designed under the main body 1, which are the lower first flow port 51, the lower second flow port 52, the lower third flow port 53, the lower fourth flow port 54, and the lower fifth flow port 55; There are 2 flow ports designed on the left side of the main body 1, which are the left first flow port 61 and the left second flow port 62; There is 1 flow port designed on the right side of the main body 1, which is the right first flow port 71; There are seven longitudinal flow channels designed in the front, middle, and back of the main body 1, namely the first longitudinal flow channel 11, the second longitudinal flow channel 12, the third longitudinal flow channel 13, the fourth longitudinal flow channel 14, the fifth longitudinal flow channel 15, the sixth longitudinal flow channel 16, the seventh longitudinal flow channel 17, the eighth longitudinal flow channel 18, and the ninth longitudinal flow channel 19; The first longitudinal flow channel 11 is close to the leftmost side of the main body 1. The front end of the first longitudinal flow channel 11 is connected to the front flow port 31, and the rear end of the first longitudinal flow channel 11 is connected to the rear flow port 41; The second longitudinal flow channel 12 and the third longitudinal flow channel 13 are located on the right side of the first longitudinal flow channel 11, and the second longitudinal flow channel 12 is located above the third longitudinal flow channel 13. The second longitudinal flow channel 12 is designed with five annular grooves from front to back, namely the first annular groove 101, the second annular groove 102, the third annular groove 103, the fourth annular groove 104, and the fifth annular groove 105; The front end of the second longitudinal flow channel 12 is connected to the front second flow port 32, and the rear end of the second longitudinal flow channel 12 is connected to the rear second flow port 42; The rear end of the third longitudinal flow channel 13 is connected to the rear third flow port 43, and the front end of the third longitudinal flow channel 13 is designed to be blocked; The first arc-shaped flow channel 21 is located above the second longitudinal flow channel 12. The front end of the first arc-shaped flow channel 21 is connected to the first annular groove 101, the rear end of the first arc-shaped flow channel 21 is connected to the fifth annular groove 105, and the front and rear ends of the first arc-shaped flow channel 21 are also respectively connected to the front and rear ends of the second longitudinal flow channel 12 near the mouth position through an arc-shaped auxiliary flow channel; The lower end of the fourth annular groove 104 is connected to the rear end of the third longitudinal flow channel 13 near the mouth position through a vertical flow channel, and the lower end of the second annular groove 102 is connected to the front end of the third longitudinal flow channel 13 near the mouth position through a vertical flow channel; The third annular groove 103 is connected to the right end of the first transverse flow channel 71 through an L-shaped flow channel, and the left end of the first transverse flow channel 71 is connected to the left first flow port 61; The front end of the first arc-shaped flow channel 21 is connected to the right end of the second transverse flow channel 72, and the left end of the second transverse flow channel 72 is connected to the left second flow port 62; The front end of the third longitudinal flow channel 13 is connected to the lower flow port 51 through the first vertical flow channel 81; The fourth longitudinal flow channel 14 is designed below and to the right of the second longitudinal flow channel 12, and the fourth longitudinal flow channel 14 is also located above and to the right of the third longitudinal flow channel 13; The fourth longitudinal flow channel 14 is designed with five annular grooves from front to back, namely the sixth annular groove 106, the seventh annular groove 107, the eighth annular groove 108, the ninth annular groove 109, the tenth annular groove 110, the eleventh annular groove 111, the twelfth annular groove 112, the thirteenth annular groove 113, and the fourteenth annular groove 114; The front end of the fourth longitudinal flow channel 14 is connected to the front third flow port 33, and the rear end of the fourth longitudinal flow channel 14 is connected to the rear fourth flow port 44; On the left side of the fourth longitudinal flow channel 14, a second arc-shaped flow channel 22 is designed. The front end of the second arc-shaped flow channel 22 is connected to the sixth annular groove 106 and the seventh annular groove 107 through two auxiliary flow channels. The rear end of the second arc-shaped flow channel 22 is connected to the thirteenth annular groove 113 and the fourteenth annular groove 114 through two auxiliary flow channels. On the right side of the fourth longitudinal flow channel 14, a third arc-shaped flow channel 23 is designed. The front end of the third arc-shaped flow channel 23 is connected to the eighth annular groove 108. The rear end of the third arc-shaped flow channel 23 is connected to the twelfth annular groove 112. The right sides of the thirteenth annular groove 113 and the fourteenth annular groove 114 are connected through a fourth arc-shaped flow channel 24. Above the sixth annular groove 106 and the seventh annular groove 107, a second vertical flow channel 82 is designed. The lower end of the second vertical flow channel 82 is connected to the sixth annular groove 106 and the seventh annular groove 107 respectively through two auxiliary flow channels. The right end of the second transverse flow channel 72 is connected to the first arc-shaped flow channel 21 and then extends to the right and is connected to the upper end of the second vertical flow channel 82. The lower right side of the right end of the fourth arc-shaped flow channel 24 is connected to the lower second flow port 52 through a vertical flow channel. The lower side of the right end of the third arc-shaped flow channel 23 near the middle position is connected to the lower third flow port 53 through a vertical flow channel, and the upper end of this vertical flow channel is also connected to the front fifth flow port 35 through a fifth longitudinal flow channel 15. On the upper left side of the fifth longitudinal flow channel 15, a sixth longitudinal flow channel 16 is designed. The front end of the sixth longitudinal flow channel 16 is connected to the front fourth flow port 34. The rear end of the sixth longitudinal flow channel 16 is connected to the rear fifth flow port 45. Four annular grooves are successively designed on the sixth longitudinal flow channel 16 from front to back near the middle position, which are the fifteenth annular groove 115, the sixteenth annular groove 116, the seventeenth annular groove 117, and the eighteenth annular groove 118 respectively. The left sides of the fifteenth annular groove 115 and the sixteenth annular groove 116 are connected through a fifth arc-shaped flow channel 25. The left side of the seventeenth annular groove 117 is connected to the right side of the fourth annular groove 104 through a transverse flow channel. On the right side of the sixth longitudinal flow channel 16, a seventh longitudinal flow channel 17 is provided. The front end of the seventh longitudinal flow channel 17 is connected to the front sixth flow port 36. The rear end of the seventh longitudinal flow channel 17 is connected to the rear sixth flow port 46. Five annular grooves are successively designed on the seventh longitudinal flow channel 17 from front to back, which are the nineteenth annular groove 119, the twentieth annular groove 120, the twenty-first annular groove 121, the twenty-second annular groove 122, and the twenty-third annular groove 123 respectively. On the right side of the seventh longitudinal flow channel 17, a sixth arc-shaped flow channel 26 is designed. The front and rear ends of the sixth arc-shaped flow channel 26 are respectively connected to the right sides of the nineteenth annular groove 119 and the twenty-third annular groove 123. Above the seventh longitudinal flow channel 17, a seventh arc-shaped flow channel 27 is designed. The front and rear ends of the seventh arc-shaped flow channel 27 are respectively connected to the front and rear positions near the mouth of the sixth longitudinal flow channel 16. The left side of the twenty-first annular groove 121 is connected to the right side of the eighteenth annular groove 118 through a Z-shaped flow channel. On the lower right of the seventh longitudinal flow channel 17, an eighth longitudinal flow channel 18 is designed. The front end of the eighth longitudinal flow channel 18 is connected to the front seven-flow port 37, and the rear end of the eighth longitudinal flow channel 18 is connected to the rear seven-flow port 47. Four annular grooves are successively designed on the eighth longitudinal flow channel 18 from front to back, namely the twenty-fourth annular groove 124, the twenty-fifth annular groove 125, the twenty-sixth annular groove 126, and the twenty-seventh annular groove 127. The left side of the twenty-fifth annular groove 125 is connected to the lower end of the twentieth annular groove 120 through an L-shaped flow channel, and the left side of the twenty-sixth annular groove 126 is also connected to the lower end of the twenty-second annular groove 122 through an L-shaped flow channel. On the right side of the eighth longitudinal flow channel 18, a ninth longitudinal flow channel 19 is designed. The front end of the ninth longitudinal flow channel 19 is connected to the front eight-flow port 38, and the rear end of the ninth longitudinal flow channel 19 is connected to the rear eight-flow port 48. Five annular grooves are successively designed on the ninth longitudinal flow channel 19 from front to back, namely the twenty-eighth annular groove 128, the twenty-ninth annular groove 129, the thirtieth annular groove 130, the thirty-first annular groove 131, and the thirty-second annular groove 132. The left side of the thirtieth annular groove 130 is connected to the twenty-fourth annular groove 124 through a type-S flow channel, and the left side of the thirty-first annular groove 131 is connected to the twenty-seventh annular groove 127 through a type-S flow channel. Above the ninth longitudinal flow channel 19, an eighth arc-shaped flow channel 28 and a ninth arc-shaped flow channel 29 are successively arranged. The ninth arc-shaped flow channel 29 is located above the eighth arc-shaped flow channel 28. The front end of the eighth arc-shaped flow channel 28 is connected to the upper end of the twenty-eighth annular groove 128, and the rear end of the eighth arc-shaped flow channel 28 is connected to the upper end of the thirty-second annular groove 132. The front and rear ends of the ninth arc-shaped flow channel 29 are respectively connected to the front and rear positions near the mouth of the eighth longitudinal flow channel 18. The lower end of the twenty-ninth annular groove 129 is connected to the lower four-flow port 54 through a vertical flow channel, and the lower end of the thirty-second annular groove 132 is connected to the lower five-flow port 55 through a vertical flow channel. Above the rear end of the ninth arc-shaped flow channel 29, it is connected to the right one-flow port 71 through an L-shaped flow channel.
[0025] The material of the hollow core bone is rolled into a hollow tube shape with 0.5-mm-thick iron sheet. The outer diameter is made to be 4 mm, and the inner diameter is 3 mm. Twenty air holes with a diameter of 2 mm are evenly distributed on the outer side of the hollow core bone. The inner diameter of the hollow core bone is designed to be 3 mm, which facilitates the passage of a 2-mm ventilation needle. The Ø2-mm small holes drilled on the hollow tube solve the exhaust problem. A 4-mm hollow core bone is placed in the main sand core, and the casting temperature is 1415 degrees. As a result, the straightness of the main runner is measured by a three-coordinate measuring hole with a bend of about 0.2, and the straightness meets the requirements of the customer's drawing. The air hole problem is also effectively solved.
[0026] During the cleaning process of the internal sand core of the casting, a quartz sand spraying gun is used. The particle size of the sand is 50 - 100 mesh. The barrel head of the gun extends into the runner of the casting, and a specified positioning part is made at the interface position and clamped outside the runner opening of the casting. The interface is positioned and sandblasted for 5 - 10 seconds. The positioning part includes a positioning ring sleeve and a positioning screw. A threaded hole is radially opened on the outer side of the positioning ring sleeve, and the threaded hole communicates with the inner hole of the positioning ring sleeve. The positioning screw is rotatably installed in the threaded hole. The positioning ring sleeve is sleeved outside the barrel head of the gun, and the positioning screw is rotatably pressed against the outside of the barrel head for positioning. Conventionally, a strong sandblasting process is used for sandblasting. However, due to the small aperture of this valve body, the barrel head of the sandblasting gun cannot be inserted. The smallest barrel head has an outer diameter of 8 mm and an inner diameter of 5 mm. If it is smaller, the steel shot cannot enter. There is also a 1.6-mm flow channel gear ring groove, and the steel shot is prone to getting stuck in the flow channel. The steel shot is 1.5-mm steel shot, and the dextrin skin at the interface cannot be cleared without sandblasting. The present invention uses a quartz sand spraying gun with a sand particle size of 50 - 100 mesh. A specified positioning part is made at the interface position and clamped outside the casting. The interface is positioned and sandblasted for 5 - 10 seconds. After spraying, the endoscope inspection meets the customer's requirements, and the flow channel is clear.
[0027] The present invention adopts the method of automatic line shakeout of the sand shell. The coated sand shell improves the surface roughness of the product, and the automatic line molding improves the compactness of the cavity to prevent the deformation and fracture of the runner caused by the expansion of the outer shape.
[0028] Main technical indicators:
Claims
1. A production process for an electromagnetic control valve body casting for a hydraulic component, characterized in that: During the production process of the electromagnetic control valve body casting, the cavity in the sand box is made according to the product shape, and then the large sand cores of the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, the fifth longitudinal flow channel, the sixth longitudinal flow channel, the seventh longitudinal flow channel, the eighth longitudinal flow channel, and the ninth longitudinal flow channel and the small sand cores of the corresponding vertical flow channel, the transverse flow channel, the arc flow channel and the other flow channels are manufactured according to the flow channel structure design of the product. Then, the large sand core of the main flow channel and the small sand cores of the other flow channels are designated to be installed in the cavity of the sand box, the sand box is closed, and molten iron is poured from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and the internal sand core is cleaned and exported to complete the processing; A hollow core bone is longitudinally installed in the large sand core, and a plurality of air holes are opened on the outer side of the hollow core bone; when the large sand core and some small sand cores are combined and processed to form, a horizontal core shooting machine is used to shoot sand from two directions; The electromagnetic control valve body casting includes a main body, a first longitudinal flow channel, a second longitudinal flow channel, a third longitudinal flow channel, a fourth longitudinal flow channel, a fifth longitudinal flow channel, a sixth longitudinal flow channel, a seventh longitudinal flow channel, an eighth longitudinal flow channel, a ninth longitudinal flow channel, a first arc flow channel, and a second arc flow channel. Eight flow channel openings are designed in front of the main body, namely, a first flow channel opening, a first second flow channel opening, a first third flow channel opening, a first fourth flow channel opening, a first fifth flow channel opening, a first sixth flow channel opening, a first seventh flow channel opening, and a first eighth flow channel opening; There are 8 flow ports designed at the back of the main body, namely the rear first flow port, rear second flow port, rear third flow port, rear fourth flow port, rear fifth flow port, rear sixth flow port, rear seventh flow port, and rear eighth flow port; There are 5 flow outlets designed under the main body, namely the lower flow outlet, the lower second flow outlet, the lower third flow outlet, the lower fourth flow outlet, and the lower fifth flow outlet; There are two flow outlets designed on the left side of the main body, namely the left first flow outlet and the left second flow outlet; There is a flow channel designed on the right side of the main body, which is the right first flow channel; Seven longitudinal flow channels are designed in the middle of the main body, namely the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, the fifth longitudinal flow channel, the sixth longitudinal flow channel, the seventh longitudinal flow channel, the eighth longitudinal flow channel, and the ninth longitudinal flow channel; The first longitudinal flow channel is close to the leftmost side of the main body, the front end of the first longitudinal flow channel is connected to the front flow channel opening, and the rear end of the first longitudinal flow channel is connected to the rear flow channel opening; The second longitudinal flow channel and the third longitudinal flow channel are located on the right side of the first longitudinal flow channel, and the second longitudinal flow channel is located above the third longitudinal flow channel. The second longitudinal flow channel is designed with five annular grooves from front to back, namely the first annular groove, the second annular groove, the third annular groove, the fourth annular groove, and the fifth annular groove; the front end of the second longitudinal flow channel is connected to the front two flow channel openings, and the rear end of the second longitudinal flow channel is connected to the rear two flow channel openings; The rear end of the third longitudinal flow channel is connected to the rear three flow channel openings, and the front end of the third longitudinal flow channel is blocked; The first arc-shaped flow channel is located above the second longitudinal flow channel, and the front end of the first arc-shaped flow channel is connected to the first annular groove, the rear end of the first arc-shaped flow channel is connected to the fifth annular groove, and the front and rear ends of the first arc-shaped flow channel are respectively connected to the front and rear ends of the second longitudinal flow channel near the mouth through an arc-shaped auxiliary flow channel; the lower end of the fourth annular groove is connected to the rear end of the third longitudinal flow channel near the mouth through a vertical flow channel, and the lower end of the second annular groove is connected to the front end of the third longitudinal flow channel near the mouth through a vertical flow channel; The third annular groove is connected to the right end of the first transverse flow channel through an L-shaped flow channel, and the left end of the first transverse flow channel is connected to the left first flow channel opening; The front end of the first arc-shaped flow channel is connected to the right end of the second transverse flow channel, and the left end of the second transverse flow channel is connected to the left second flow channel opening; The front end of the third longitudinal flow channel is connected to the next flow channel opening through the first vertical flow channel; A fourth longitudinal flow channel is arranged at the lower right of the second longitudinal flow channel, and the fourth longitudinal flow channel is also arranged at the upper right of the third longitudinal flow channel; The fourth longitudinal flow channel is designed with five annular grooves from front to back, namely the sixth annular groove, the seventh annular groove, the eighth annular groove, the ninth annular groove, the tenth annular groove, the eleventh annular groove, the twelfth annular groove, the thirteenth annular groove, and the fourteenth annular groove; the front end of the fourth longitudinal flow channel is connected to the front three flow channel openings, and the rear end of the fourth longitudinal flow channel is connected to the rear four flow channel openings; A second arc-shaped flow channel is designed on the left side of the fourth longitudinal flow channel. The front end of the second arc-shaped flow channel is connected to the sixth ring groove and the seventh ring groove through two auxiliary flow channels, and the rear end of the second arc-shaped flow channel is connected to the thirteenth ring groove and the fourteenth ring groove through two auxiliary flow channels. A third arc-shaped flow channel is designed on the right side of the fourth longitudinal flow channel, the front end of the third arc-shaped flow channel is connected to the eighth ring groove, the rear end of the third arc-shaped flow channel is connected to the twelfth ring groove, and the right sides of the thirteenth ring groove and the fourteenth ring groove are connected through the fourth arc-shaped flow channel. A second vertical flow channel is designed above the sixth annular groove and the seventh annular groove, and the lower end of the second vertical flow channel is respectively connected to the sixth annular groove and the seventh annular groove through two auxiliary flow channels, and the right end of the second transverse flow channel is connected to the first arc flow channel and then extends to the right and connected to the upper end of the second vertical flow channel; The lower right end of the fourth arc-shaped flow channel is connected to the lower two flow channel openings through a vertical flow channel, the lower right end of the third arc-shaped flow channel is connected to the lower three flow channel openings through a vertical flow channel near the middle position, and the upper end of the vertical flow channel is also connected to the first five flow channel openings through a fifth longitudinal flow channel; A sixth longitudinal flow channel is designed above and to the left of the fifth longitudinal flow channel, the front end of the sixth longitudinal flow channel is connected to the front four flow channel openings, and the rear end of the sixth longitudinal flow channel is connected to the rear five flow channel openings; four annular grooves are designed near the middle position on the sixth longitudinal flow channel from front to back, namely the fifteenth annular groove, the sixteenth annular groove, the seventeenth annular groove, and the eighteenth annular groove; the left sides of the fifteenth annular groove and the sixteenth annular groove are connected through the fifth arc flow channel, and the left side of the seventeenth annular groove is connected to the right side of the fourth annular groove through a transverse flow channel; A seventh longitudinal flow channel is arranged on the right side of the sixth longitudinal flow channel, the front end of the seventh longitudinal flow channel is connected to the front six flow channel openings, and the rear end of the seventh longitudinal flow channel is connected to the rear six flow channel openings; five annular grooves are designed on the seventh longitudinal flow channel from front to back, namely, the nineteenth annular groove, the twentieth annular groove, the twenty-first annular groove, the twenty-second annular groove, and the twenty-third annular groove; A sixth arc-shaped flow channel is designed on the right side of the seventh longitudinal flow channel, and the front and rear ends of the sixth arc-shaped flow channel are respectively connected to the right sides of the nineteenth ring groove and the twenty-third ring groove; a seventh arc-shaped flow channel is designed above the seventh longitudinal flow channel, and the front and rear ends of the seventh arc-shaped flow channel are respectively connected to the front and rear positions near the mouth of the sixth longitudinal flow channel; the left side of the twenty-first ring groove is connected to the right side of the eighteenth ring groove through a Z-shaped flow channel, and an eighth longitudinal flow channel is designed at the lower right side of the seventh longitudinal flow channel, the front end of the eighth longitudinal flow channel is connected to the first seven flow channel openings, and the rear end of the eighth longitudinal flow channel is connected to the rear seven flow channel openings; four ring grooves are designed on the eighth longitudinal flow channel from front to back, namely the twenty-fourth ring groove, the twenty-fifth ring groove, the twenty-sixth ring groove, and the twenty-seventh ring groove; the left side of the twenty-fifth ring groove is connected to the lower end of the twentieth ring groove through an L-shaped flow channel, and the left side of the twenty-sixth ring groove is also connected to the lower end of the twenty-second ring groove through an L-shaped flow channel; A ninth longitudinal flow channel is designed on the right side of the eighth longitudinal flow channel, the front end of the ninth longitudinal flow channel is connected to the front eight flow channel openings, and the rear end of the ninth longitudinal flow channel is connected to the rear eight flow channel openings; five annular grooves are designed on the ninth longitudinal flow channel from front to back, namely the twenty-eighth annular groove, the twenty-ninth annular groove, the thirtieth annular groove, the thirty-first annular groove, and the thirty-second annular groove; the left side of the thirtieth annular groove is connected to the twenty-fourth annular groove through a type of S-shaped flow channel, and the left side of the thirty-first annular groove is connected to the twenty-seventh annular groove through a type of S-shaped flow channel; The eighth arc flow channel and the ninth arc flow channel are arranged in sequence above the ninth longitudinal flow channel. The ninth arc flow channel is located above the eighth arc flow channel. The front end of the eighth arc flow channel is connected to the upper end of the twenty-eighth annular groove, and the rear end of the eighth arc flow channel is connected to the upper end of the thirty-second annular groove; the front and rear ends of the ninth arc flow channel are respectively connected to the front and rear ends of the eighth longitudinal flow channel near the mouth; the lower end of the twenty-ninth annular groove is connected to the lower four flow channel openings through a vertical flow channel, and the lower end of the thirty-second annular groove is connected to the lower five flow channel openings through a vertical flow channel; the rear end of the ninth arc flow channel is connected to the right one flow channel opening through an L-shaped flow channel.
2. The production process of a solenoid control valve body casting for hydraulic components according to claim 1, characterized in that: The material of the hollow core bone is rolled into a hollow tube shape with a 0.5 thick iron sheet, the outer diameter is customized to be 4mm, the inner diameter is 3mm, and the outer side of the hollow core bone is evenly distributed with 20 pores with a diameter of 2mm.
3. The production process of a solenoid control valve body casting for hydraulic components according to claim 1, characterized in that: During the cleaning process of the internal sand core of the casting, a spray gun for quartz sand is used. The sand particle size is 50-100 mesh. The barrel of the spray gun is inserted into the flow channel of the casting and a designated positioning piece is made at the interface position and stuck on the outside of the flow channel opening of the casting. The interface is positioned and sandblasted for 5-10 seconds.
4. The production process of a solenoid control valve body casting for hydraulic components according to claim 3, characterized in that: The positioning piece includes a positioning ring sleeve and a positioning screw. A threaded hole is radially opened on the outer side of the positioning ring sleeve, the threaded hole is connected to the inner hole of the positioning ring sleeve, the positioning screw is rotatably installed in the threaded hole, the positioning ring sleeve is sleeved on the outer side of the barrel head of the spray gun, and the positioning screw is rotatably pressed against the outer side of the barrel head for positioning.