Lock-up clutch oil cylinder body nodular iron casting casting process

Abstract

The invention relates to a lockup clutch oil cylinder body nodular iron casting casting process which comprises the following steps: step 1, a sand box forming procedure: after an upper sand box and a lower sand box of a sand box mechanism are respectively positioned and fixed on two female dies, molding sand is uniformly sprayed into the upper sand box and the lower sand box through a sand blasting mechanism; 2, an inner mold assembling procedure: positioning and assembling an inner mold assembly of an inner mold mechanism into the lower sand box, positioning and assembling the upper sand box on the lower sand box after a main cavity is formed between the inner mold assembly and the lower sand box, and forming an auxiliary cavity between the inner mold assembly and the upper sand box; 3, a casting pouring procedure is conducted, specifically, the nodular cast iron melt in the smelting furnace is poured into the main cavity and the auxiliary cavity, and after the nodular cast iron melt is cooled and solidified, a main oil cylinder and an auxiliary oil cylinder of the clutch are formed through mold removal of a mold removal mechanism; the problems that the automation degree is low, the production efficiency is low, the production cost is high, the rate of finished products is low, and potential safety hazards exist during casting of existing ink iron castings are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ductile iron casting, in particular to a casting process of a ductile iron casting of a locking clutch oil cylinder body. Background Art

[0002] As a traditional functional material, ductile iron has excellent comprehensive performance due to the presence of a large number of graphite nodules in the matrix. It has many superior properties that other alloy materials cannot match, such as good wear resistance, mechanical properties, casting properties, shock absorption performance, and low sensitivity to notches. Ductile iron has developed into an important part of the machinery manufacturing industry. The production process is simple and flexible, suitable for production of various scales, and plays an important role in economic development. Therefore, ductile iron has become an ideal choice to replace some steel castings in modern industry, especially in parts scenarios that need to take into account strength, cost and complex molding, and is widely used in automotive parts.

[0003] Patent document CN108825676A discloses a wet shift clutch cylinder, which includes: a clutch auxiliary cylinder assembly, a clutch master cylinder, a piston and an elastic member; the clutch auxiliary cylinder assembly and the clutch master cylinder are radially arranged on the outside of the clutch bearing in sequence and fixedly connected; one end of the piston is connected to the clutch auxiliary cylinder assembly through an elastic member, and the other end is connected to the clutch master cylinder; the clutch auxiliary cylinder assembly is filled with lubricating oil; and the clutch master cylinder is filled with operating pressure oil.

[0004] However, in the actual casting production process of ductile iron parts, the inventors found that the existing cavity making process usually involves manually using a pattern to make a cavity in a sand box, which has a low degree of automation and requires high manual operation proficiency, resulting in high production costs. In addition, manual shaping may lead to problems such as inaccurate positioning of the pattern and the sand box, uneven compaction or improper shaping, resulting in a low yield rate. At the same time, more time is required to adjust the mold mechanism, resulting in low production efficiency. In addition, manual auxiliary operations are required when pouring the ductile iron melt, which poses a safety hazard. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the existing technology. By setting a sand box mechanism, the upper and lower sand boxes in the sand box molding process are automatically positioned and fixed on the mother mold, and the sand blasting mechanism is used to automatically and evenly blast the sand, avoiding traditional manual operations, ensuring the integrity and stability of demolding, and reducing subsequent processing allowances. At the same time, the split upper and lower sand boxes are assisted by the inner mold mechanism in the inner mold assembly process to automatically position and combine with the inner mold assembly, so as to accurately reproduce the connected main cavity and auxiliary cavity, and then cooperate with the smelting furnace to fill the main cavity and auxiliary cavity through the pouring port in the casting process. The main oil cylinder and auxiliary oil cylinder of the integral casting cooperate with the special demolding mechanism to automatically loosen the sand and remove the inner mold and cut and separate them, avoiding manual assisted production, reducing the repeated process of separate casting, and ensuring the continuity of production. This solves the problems of low automation, low production efficiency, high production cost, low yield rate, and safety hazards in the existing ink cast iron casting.

[0006] In order to solve the above technical problems, the following technical solutions are adopted: a casting process for ductile iron castings of a locking clutch oil cylinder body, comprising the following steps: Step 1: Sand box molding process, designing two master molds of the sand box mechanism according to the upper and lower outer contours of the casting, and positioning and fixing the upper sand box and the lower sand box of the sand box mechanism on the two master molds respectively, and then using the sand blasting mechanism to evenly spray the molding sand into the upper sand box and the lower sand box until the molding sand solidifies and the upper sand box and the lower sand box are demolded; Step 2: Inner mold assembly process, the inner mold assembly of the inner mold mechanism is designed according to the inner contour of the casting, and the inner mold assembly is positioned and assembled into the lower flask to form a main cavity between the inner mold assembly and the lower flask. Then, the upper flask is positioned and assembled on the lower flask to form a secondary cavity connected to the main cavity between the inner mold assembly and the upper flask; Step 3: Casting process, pouring the ductile iron melt in the smelting furnace into the main cavity and the auxiliary cavity through the pouring port of the upper sand box, and after the ductile iron melt cools and solidifies to form the main cylinder and auxiliary cylinder of the clutch, the molding sand is loosened and separated by the mold removal mechanism and the inner mold assembly is removed, so that the main cylinder and the auxiliary cylinder can be cut, separated and formed.

[0007] Preferably, the locking clutch oil cylinder body ductile iron casting process further comprises the following steps: Step 4: Casting inspection process, after the main oil cylinder and the auxiliary oil cylinder are cut and separated by the demoulding mechanism, the formed cut portion is positioned and grooved, and then the composition of the ductile iron in the groove is inspected and analyzed by the inspection mechanism.

[0008] Preferably, in the casting process, the auxiliary cavity for forming the auxiliary oil cylinder is poured first, and after preheating the upper sand box, the lower sand box and the inner mold assembly, the main cavity for forming the main oil cylinder is poured.

[0009] Preferably, the sand box mechanism includes two master molds arranged on the sandblasting mechanism, a conveying component arranged on the outside of the sandblasting mechanism and used to position and convey the upper sand box and the lower sand box to the two master molds respectively, and the positioning component arranged on the upper sand box and the lower sand box and used to position and connect the corresponding master molds.

[0010] Preferably, the positioning assembly includes at least two positioning posts arranged on the upper sand box and the sandblasting mechanism, at least two positioning sleeves arranged on the lower sand box and the sandblasting mechanism and used to sleeve on the positioning posts, a guide structure arranged on the positioning posts and / or the positioning sleeves, a connecting groove formed on the outer annular surface of the positioning post, a connecting ball radially movably arranged on the inner wall of the positioning sleeve, and a first elastic member arranged on the positioning sleeve and used to force the connecting ball to connect to the connecting groove.

[0011] Preferably, the inner mold mechanism includes a support seat arranged on the outside of the smelting furnace, a support column arranged on the support seat and cooperating with the positioning sleeve to position and support the lower sand box, an inner mold assembly arranged in the lower sand box, and an assembly assembly arranged on the outside of the support seat and used to position and assemble the inner mold assembly into the lower sand box.

[0012] Preferably, the inner mold assembly includes an inner mold column arranged in the lower sand box, at least two partition plates spliced ​​between the outer annular surface of the inner mold column and the inner annular surface of the lower sand box and used to separate the main cavity and the auxiliary cavity, a forming mold arranged on the partition plate and extending into the auxiliary cavity, and a pouring channel formed on the forming mold and the partition plate and connected to the main cavity and the auxiliary cavity, and the pouring channel is formed at the joint between the two partition plates.

[0013] Preferably, the assembly component includes a conveyor belt arranged on the outside of the support seat and used to convey the inner mold assembly, a first telescopic frame movably arranged directly above the conveyor belt and the support platform, an arc-shaped clamping plate opened and closed on the first telescopic frame and used to clamp the outer annular surface of the forming mold, and a positioning rod arranged on the first telescopic frame and cooperating with the positioning sleeve to guide and position the inner mold assembly.

[0014] Preferably, the sandblasting mechanism includes a base for mounting the master mold, an exhaust assembly arranged on the base and inserted into the upper sand box and the lower sand box, a sandblasting machine arranged above the base, and a driving assembly arranged on the sandblasting machine and used to drive the sandblasting tube on the sandblasting machine to evenly spray the molding sand into the upper sand box and the lower sand box.

[0015] Preferably, the driving assembly includes a second telescopic frame movably arranged between the two master molds, a vortex groove arranged on the second telescopic frame and slidably connected to the sandblasting tube, a driving rod rotatably arranged on the second telescopic frame and slidably connected to the sandblasting tube and used to drive the sandblasting tube to slide along the vortex groove, a support frame rotatably arranged on the sandblasting tube, a pushing arm rotatably arranged on the support frame, and a second elastic member arranged on the support frame and used to force the pushing arm to push the end of the sandblasting tube to bend to the bottom of the exhaust assembly.

[0016] Beneficial effects of the present invention: (1) In the present invention, a sand box mechanism is provided so that the upper sand box and the lower sand box in the sand box molding process are automatically positioned and fixed on the mother mold, and the sand blasting mechanism is used to automatically and evenly blast the sand, thereby avoiding the inaccurate positioning and uneven density of the sand filling caused by traditional manual methods, ensuring that the molding sand has high smoothness and stable dimensions after demolding, and reducing the subsequent processing allowance. At the same time, the split upper sand box and the lower sand box are assisted by the inner mold mechanism to automatically position and combine with the inner mold assembly in the inner mold assembly process, so as to accurately reproduce the connected main mold cavity and the auxiliary mold cavity, and then cooperate with the smelting furnace to fill the auxiliary mold cavity in sequence through the pouring port in the casting process. The main and auxiliary mold cavities are connected to each other to ensure consistent metallurgical bonding between the main and auxiliary cylinders, resulting in better overall mechanical properties. The auxiliary cavity with a smaller volume is poured first to achieve preheating, ensuring the fluidity of the ductile iron melt when the main cavity is subsequently poured. In addition, the integrally cast main and auxiliary cylinders cooperate with a dedicated demolding mechanism to automatically loosen sand and remove the inner mold, then cut, separate, and locate the groove, reducing the difficulty of manual cleaning and shortening the cycle. At the same time, the testing mechanism is used to test and analyze the composition of the ductile iron in a groove during the casting inspection process, reducing the repeated processes of separate casting and testing, and ensuring production continuity. (2) The present invention provides a split upper sand box and a lower sand box, which are respectively used to transport the components and cooperate with the positioning components to quickly position and connect the two mother molds. The sandblasting mechanism, the inner mold mechanism, the melting furnace, the demolding mechanism and the detection mechanism are sequentially coordinated to integrate the sand mold preparation, mold assembly, molten metal pouring, demolding and detection processes, thereby realizing an integrated automatic operation from molding sand filling to finished product inspection, reducing manual intervention, reducing quality fluctuations caused by operational differences, and significantly improving the casting efficiency of the main oil cylinder and the auxiliary oil cylinder of the clutch. The equipment takes into account both flexible production and scale benefits through modular design, and has significant competitiveness in the fields of automobiles and engineering machinery. (3) In the present invention, positioning columns and positioning sleeves are provided to realize the positioning and assembly between the upper sand box and the lower sand box, and the positioning columns and positioning sleeves on the sandblasting mechanism are used to realize the positioning between the upper sand box and the lower sand box and the corresponding mother mold. At the same time, the support seat and the support column are used to cooperate with the positioning sleeve to position and support the lower sand box, and the positioning rod is used to cooperate with the positioning sleeve on the lower sand box to position the inner mold assembly to realize positioning assembly. The entire production process is positioned through a unified structure with a simple structure and good positioning effect. In addition, the first elastic member is used to force the connecting ball to connect the connecting groove to realize further positioning between the positioning column and the positioning sleeve, forming a mechanical interlock to resist the displacement of the upper sand box and the lower sand box caused by the impact during the sandblasting process and the pouring process. In addition, this structure is easy to disassemble to avoid damage to the molding sand. In summary, this process has the effects of high degree of automation, high production efficiency, low production cost, high yield rate in casting ductile iron parts, and avoidance of safety hazards. It is particularly suitable for the field of ductile iron casting technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The present invention provides a casting process for a locking clutch oil cylinder body ductile iron casting.

[0019] Figure 2 The present invention provides a schematic structural diagram of a ductile iron casting equipment.

[0020] Figure 3 This is a structural schematic diagram of the sand box mechanism provided by the present invention.

[0021] Figure 4 This is a schematic structural diagram of the upper and lower flasks provided by the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the upper sand box and the lower sand box after sandblasting molding provided by the present invention.

[0023] Figure 6 This is a cross-sectional view of the assembled upper flask, lower flask and inner mold assembly provided by the present invention.

[0024] Figure 7 The present invention provides Figure 6 A partial enlarged view of point A in the middle.

[0025] Figure 8This is an exploded schematic diagram of the upper flask, lower flask and inner mold assembly provided by the present invention.

[0026] Figure 9 This is a structural schematic diagram of the inner mold mechanism provided by the present invention.

[0027] Figure 10 This is a structural schematic diagram of the sandblasting mechanism provided by the present invention.

[0028] Figure 11 This is a schematic structural diagram of the exhaust assembly provided by the present invention.

[0029] Figure 12 This is a schematic structural diagram of the drive assembly provided by the present invention.

[0030] Figure 13-14 The present invention provides Figure 12 Driving process diagram of the driving component in Figure 2.

[0031] Figure 15 This is a structural schematic diagram of the mold removal mechanism provided by the present invention.

[0032] Figure 16 This is a schematic diagram of the structure of the main oil cylinder and auxiliary oil cylinder provided by the present invention after demoulding.

[0033] Figure 17 This is a schematic diagram of the structure of the main oil cylinder and the auxiliary oil cylinder after cutting provided by the present invention. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.

[0035] Example 1 like Figures 1-8 as well as Figure 16-17 As shown, a casting process for a locking clutch oil cylinder body ductile iron casting comprises the following steps: Step 1: Sand box molding process, respectively designing two master molds 11 of the sand box mechanism 1 according to the upper and lower outer contours of the casting, and after the upper sand box 12 and the lower sand box 13 of the sand box mechanism 1 are positioned and fixed on the two master molds 11, the sand blasting mechanism 2 is used to evenly spray the molding sand into the upper sand box 12 and the lower sand box 13 until the molding sand solidifies and the upper sand box 12 and the lower sand box 13 are demolded; Step 2: Inner mold assembly process: Design the inner mold assembly 33 of the inner mold mechanism 3 according to the inner contour of the casting, and position and assemble the inner mold assembly 33 into the drag flask 13 so that a main mold cavity 333 is formed between the inner mold assembly 33 and the drag flask 13. Then, position and assemble the cope flask 12 onto the drag flask 13 so that a secondary mold cavity 334 is formed between the inner mold assembly 33 and the cope flask 12, which is connected to the main mold cavity 333. Step 3: Casting process, the ductile iron melt in the melting furnace 4 is poured into the main cavity 333 and the auxiliary cavity 334 through the pouring port 121 of the upper sand box 12. After the ductile iron melt is cooled and solidified to form the main cylinder 7 and the auxiliary cylinder 8 of the clutch, the mold stripping mechanism 5 is used to loosen the molding sand and remove the inner mold assembly 33, so that the main cylinder 7 and the auxiliary cylinder 8 can be cut, separated and formed.

[0036] In this embodiment, a sand box mechanism 1 is provided so that the upper sand box 12 and the lower sand box 13 in the sand box molding process are automatically positioned and fixed on the mother mold 11, and the sand blasting mechanism 2 is cooperated to automatically and evenly blast sand, thereby avoiding the inaccurate positioning and uneven density of the sand filling caused by traditional manual methods, ensuring that the molding sand has high smoothness and stable dimensions after demolding, and reducing the subsequent processing allowance. At the same time, the split upper sand box 12 and the lower sand box 13 are assisted by the inner mold mechanism 3 to automatically position and combine with the inner mold assembly 33 in the inner mold assembly process, so as to accurately reproduce the connected main mold cavity 333 and the auxiliary mold cavity 334, and then cooperate with the smelting furnace 4 to fill the main mold cavity 333 and the auxiliary mold cavity 334 through the pouring port 121 in the casting process, ensuring that the metallurgical bonding of the main cylinder 7 and the auxiliary cylinder 8 is consistent, and the overall mechanical properties are better. In addition, the main oil cylinder 7 and the auxiliary oil cylinder 8 of the integral casting cooperate with the special demolding mechanism 5 to automatically loosen the sand and cut and separate them after removing the inner mold, reducing the difficulty of manual cleaning, shortening the cycle, reducing the repetitive processes of separate casting, and ensuring the continuity of production.

[0037] Further, if Figure 1-Figure 2 As shown, the casting process of the ductile iron casting of the locking clutch oil cylinder body also includes the following steps: Step 4: Casting inspection process, after the main oil cylinder 7 and the auxiliary oil cylinder 8 are cut and separated by the demolding mechanism 5, the formed cut portion 72 is positioned and pressed into a groove 73, and then the composition of the ductile iron in the groove 73 is inspected and analyzed by the inspection mechanism 6.

[0038] In this embodiment, a demolding mechanism 5 is provided to directly position and press grooves 73 on the cut portion 72 after the main oil cylinder 7 and the auxiliary oil cylinder 8 are cut, so that the cut portion 72 can avoid being re-polished to leak out the internal material, thereby reducing cumbersome processes. At the same time, the detection mechanism 6 is used to perform a detection and analysis on the composition of the ductile iron in the press groove 73 on the main oil cylinder 7 or the auxiliary oil cylinder 8, so that the quality of the main oil cylinder 7 and the auxiliary oil cylinder 8 can be detected at the same time, thereby reducing repeated processes during detection and improving production efficiency.

[0039] Further, if Figure 1 as well as Figure 6-Figure 7 As shown, in the casting process, the auxiliary cavity 334 for forming the auxiliary oil cylinder 8 is poured first, and after the upper sand box 12, the lower sand box 13 and the inner mold assembly 33 are preheated, the main cavity 333 for forming the main oil cylinder 7 is poured.

[0040] In this embodiment, preheating is achieved by pouring the small-volume auxiliary cavity 334 first, thereby ensuring the fluidity of the ductile iron melt when subsequently pouring the main cavity 333, improving the pouring efficiency and effect, and ensuring the quality of the product.

[0041] Example 2 like Figures 1-4 as well as Figure 16-17 As shown, the present application also provides a ductile iron casting equipment, based on a ductile iron casting process for a locking clutch oil cylinder body in the first embodiment, comprising: The system comprises a flask mechanism 1 for pouring a main oil cylinder 7 and a sub-oil cylinder 8, a sandblasting mechanism 2 disposed outside the flask mechanism 1 and for filling the flask mechanism 1 with molding sand, an inner mold mechanism 3 disposed inside the flask mechanism 1 and forming a main mold cavity 333 and a sub-molding cavity 334 communicating with the molding sand, a smelting furnace 4 disposed outside the sandblasting mechanism 2 and for pouring ductile iron melt into the flask mechanism 1, a demolding mechanism 5 disposed outside the smelting furnace 4 and for demolding the flask mechanism 1 from the inner mold mechanism 3, and a detection mechanism 6 disposed on the demolding mechanism 5 and used to detect the main oil cylinder 7 and the sub-oil cylinder 8 during casting and molding; The sand box mechanism 1 includes two master molds 11 arranged on the sandblasting mechanism 2, a conveying component 14 arranged on the outside of the sandblasting mechanism 2 and used to position and convey the upper sand box 12 and the lower sand box 13 to the two master molds 11 respectively, and a positioning component 15 arranged on the upper sand box 12 and the lower sand box 13 and used to position and connect the corresponding master molds 11.

[0042] In this embodiment, by setting up a split upper sand box 12 and a lower sand box 13, the conveying assembly 14 is used for conveying and cooperates with the positioning assembly 15 to quickly position and connect the two mother molds 11, and cooperates with the sandblasting mechanism 2, the inner mold mechanism 3, the melting furnace 4, the demolding mechanism 5 and the detection mechanism 6 in turn, integrating the sand mold preparation, mold assembly, molten liquid pouring, demolding and detection processes, and realizing an integrated automatic operation from molding sand filling to finished product inspection, which is convenient for the molding of the sand box mechanism and the cooperation with the inner mold mechanism 3 to position and assemble the mold for pouring, reducing manual intervention, reducing quality fluctuations caused by operational differences, and significantly improving the casting efficiency of the main oil cylinder 7 and the auxiliary oil cylinder 8 of the clutch. The equipment takes into account flexible production and scale benefits through modular design, and has significant competitiveness in the fields of automobiles and engineering machinery.

[0043] It should be noted that the smelting furnace 4 itself and the installation method are both existing technologies and will not be described in detail here; in addition, the characteristics of the cast iron parts are collected in advance through computer-aided software, and then a mother mold 11 suitable for the cast iron parts is designed and manufactured. This method is also existing technology and will not be described in detail here.

[0044] Further, if Figure 3-Figure 7As shown, the positioning assembly 15 includes at least two positioning posts 151 arranged on the upper sand box 12 and the sandblasting mechanism 2, at least two positioning sleeves 152 arranged on the lower sand box 13 and the sandblasting mechanism 2 and used to sleeve on the positioning posts 151, a guide structure arranged on the positioning posts 151 and / or the positioning sleeves 152, a connecting groove 153 formed on the outer annular surface of the positioning post 151, a connecting ball 154 radially movably arranged on the inner wall of the positioning sleeve 152, and a first elastic member 155 arranged on the positioning sleeve 152 and used to force the connecting ball 154 to connect to the connecting groove 153.

[0045] In this embodiment, by setting a positioning column 151 and cooperating with the positioning sleeve 152, the positioning between the upper sand box 12 and the lower sand box 13 and between the upper sand box 12 and the lower sand box 13 and the corresponding mother mold 11 are achieved, and the first elastic member 155 is used to force the connecting ball 154 to connect to the connecting groove 153, so as to push the positioning column 151 and the positioning sleeve 152 to further position, thereby forming a mechanical interlock to resist the displacement of the upper sand box 12 and the lower sand box 13 caused by the impact during the sandblasting process and the pouring process. At the same time, when opening the mold, this connection structure only requires axial tension to overcome the elastic force of the first elastic member 155, and the connecting ball 154 is separated from the connecting groove 153, which is convenient for disassembly and avoids damage to the molding sand without the need for additional tools.

[0046] In detail, when in use, the conveying assembly 14 positions and conveys the upper flask 12 and the lower flask 13 to the sandblasting mechanism 2, and then the positioning posts 151 or the positioning sleeves 152 of the upper flask 12 and the lower flask 13 correspond to the positioning posts 151 or the positioning sleeves 152 on the sandblasting mechanism 2 to achieve positioning support. Then, in the process of the first elastic member 155 forcing the connecting ball 154 to connect to the connecting groove 153, the upper flask 12 and the lower flask 13 are forced to move further and position further until they are in contact with the mother mold 11. The smoothness and dimensional stability of the molding sand in the upper sand box 12 and the lower sand box 13 are improved. After the upper sand box 12 and the lower sand box 13 are sandblasted, the conveying component 14 conveys and pulls the upper sand box 12 and the lower sand box 13 axially to directly realize demolding, and then the two can be positioned, connected, assembled and fit together through the positioning component 15, and then cooperate with the inner mold mechanism 3 to accurately reproduce the main cavity 333 and the auxiliary cavity 334 therein, thereby improving the molding accuracy of the main oil cylinder 7 and the auxiliary oil cylinder 8 and reducing the subsequent processing allowance.

[0047] It should be noted that both the positioning post 151 and the positioning sleeve 152 are provided with a guide structure to improve the guiding effect, and the guide structure can be a guiding inclined surface or a guiding arc surface.

[0048] Further, if Figure 3-4As shown, the conveying assembly 14 includes two conveyor belts 141 arranged on the outside of the mother mold 11 and used to convey the upper sand box 12 and the lower sand box 13 respectively, a rotating frame 142 rotatably arranged on the outside of the mother mold 11, a mobile frame 143 movably arranged on the rotating frame 142, and two sets of clamps 144 that are opened and closed and rotatably arranged on the mobile frame 143 and used to clamp the two positioning columns 151 and the two positioning sleeves 152 respectively.

[0049] In this embodiment, by providing a clamping hand 144 to clamp the two positioning columns 151 or the two positioning sleeves 152, the rotating rotating frame 142 and the moving movable frame 143 can be coordinated to realize the transportation of the conveyor belt 141 and the upper sand box 12 and the lower sand box 13 on the sandblasting mechanism 2, and the rotating clamping hand 144 can be coordinated to realize the flipping of the lower sand box 13 after demolding on the sandblasting mechanism 2, so that the lower sand box 13 and the upper sand box 12 can be transported to the smelting furnace 4 in turn and mechanically interlocked for positioning.

[0050] It should be noted that limiting rods for limiting the positioning columns 151 and the positioning sleeves 152 are provided on both sides of the conveyor belt 141, thereby positioning the upper sand box 12 and the lower sand box 13 that have a large displacement during transportation, so as to facilitate subsequent clamping by the clamping hands 144.

[0051] Further, if Figure 8-Figure 9 As shown, the inner mold mechanism 3 includes a support base 31 arranged on the outside of the smelting furnace 4, a support column 32 arranged on the support base 31 and cooperating with the positioning sleeve 152 to position and support the lower sand box 13, an inner mold assembly 33 arranged in the lower sand box 13, and an assembly assembly 34 arranged on the outside of the support base 31 and used to position and assemble the inner mold assembly 33 into the lower sand box 13.

[0052] In this embodiment, the support seat 31 and the support column 32 are provided in conjunction with the positioning sleeve 152 to position and support the lower sand box 13, so as to facilitate the assembly component 34 to position and assemble the inner mold component 33 into the lower sand box 13, thereby facilitating unmanned assembly and avoiding misalignment of the assembled mold during pouring.

[0053] It should be noted that positioning sleeves 152 are provided on both sides of the lower sand box 13. The two positioning sleeves 152 respectively cooperate with the positioning columns 151 on the upper sand box 12 and the support columns 32 on the support seat 31 to facilitate positioning. The support columns 32 are also provided with connecting grooves 153 connected to the connecting balls 154, which position and support the lower sand box 13 while connecting and positioning it.

[0054] Further, if Figure 6 as well as Figure 8-Figure 9As shown, the inner mold assembly 33 includes an inner mold column 331 arranged in the lower sand box 13, at least two partition plates 332 spliced ​​between the outer annular surface of the inner mold column 331 and the inner annular surface of the lower sand box 13 and used to separate the main cavity 333 and the auxiliary cavity 334, a forming mold 335 arranged on the partition plate 332 and extending into the auxiliary cavity 334, and a pouring channel 336 formed on the forming mold 335 and the partition plate 332 and connected to the main cavity 333 and the auxiliary cavity 334, and the pouring channel 336 is formed at the splicing between the two partition plates 332.

[0055] In this embodiment, an inner mold column 331 is provided to support the positioning and splicing between the partition plate 332 and the inner annular surface of the lower sand box 13, so that the partition plate 332 and the inner mold column 331 cooperate with the lower sand box 13 and the upper sand box 12 respectively to form the main cavity 333 and the auxiliary cavity 334 respectively, and a pouring channel 336 is formed between the two partition plates 332 to realize pouring the auxiliary cavity 334 through the pouring port 121 and then pouring the main cavity 333 through the pouring channel 336. At the same time, when demolding, the connection 71 between the formed main oil cylinder 7 and the auxiliary oil cylinder 8 is avoided from interfering with the demolding.

[0056] It should be noted that the two partition plates 332 are respectively provided with splicing grooves 337 and splicing rods 338 for connecting to each other, and the inner mold column 331 is also provided with splicing grooves 337 and splicing rods 338, thereby realizing the splicing connection between the two partition plates 332 and the inner mold column 331.

[0057] Further, if Figure 8 As shown, the assembly component 34 includes a conveyor belt 341 arranged on the outside of the support base 31 and used to convey the inner mold assembly 33, a first telescopic frame 342 rotatably arranged directly above the conveyor belt 341 and the support platform, an arc-shaped clamping plate 343 opened and closed on the first telescopic frame 342 and used to clamp the outer annular surface of the forming mold 335, and a positioning rod 344 arranged on the first telescopic frame 342 and cooperating with the positioning sleeve 152 to guide and position the inner mold assembly 33.

[0058] In this embodiment, a rotating first telescopic frame 342 is provided to cooperate with the arc-shaped clamping plate 343 to position and clamp the inner mold assembly 33 transported on the conveyor belt 341 by tightening the outer annular surface of the adaptive forming mold 335, and at the same time, the two partition mold plates 332 are forced to clamp and further position, thereby improving the stability of the splicing. In addition, when assembling the inner mold assembly 33, the positioning rod 344 on the first telescopic frame 342 cooperates with the positioning sleeve 152 on the lower sand box 13 to position the inner mold assembly 33, thereby realizing positioning assembly and avoiding damage to the structure of the sand box.

[0059] Further, if Figure 10As shown, the sandblasting mechanism 2 includes a base 21 for mounting the mother mold 11, an exhaust assembly 22 arranged on the base 21 and inserted into the upper sand box 12 and the lower sand box 13, a sandblasting machine 23 arranged above the base 21, and a driving assembly 24 arranged on the sandblasting machine 23 and used to drive the sandblasting tube 231 on the sandblasting machine 23 to evenly spray the molding sand into the upper sand box 12 and the lower sand box 13.

[0060] In this embodiment, after the base 21 is set to support the positioning and assembly between the two master molds 11 and the upper sand box 12 and the lower sand box 13, the driving component 24 is able to drive the sandblasting tube 231 on the sandblasting machine 23 to evenly spray the molding sand into the upper sand box 12 and the lower sand box 13. At the same time, the exhaust component 22 is inserted into the upper sand box 12 and the lower sand box 13 to facilitate the discharge of gas during the filling and solidification of the molding sand, so that the molding sand is filled sufficiently and evenly and the solidification effect is good.

[0061] Further, if Figure 11 As shown, the exhaust assembly 22 includes a plurality of support rings 221 arranged in the upper sand box 12 and the lower sand box 13, exhaust columns 222 inserted into each support ring 221, a plurality of slide rails 223 arranged on the base 21, a clamping arm 224 slidably arranged on the slide rails 223 and used to clamp the exhaust columns 222, and a vibrating member arranged in the base 21.

[0062] In this embodiment, the slide rail 223 is provided to cooperate with the clamping arm 224 to clamp and drive the exhaust column 222 to insert or withdraw the upper sand box 12 and the lower sand box 13, thereby exhausting the molding sand. At the same time, the vibration part is used to further improve the exhaust effect and efficiency while improving the filling efficiency and filling adequacy of the molding sand, thereby improving production efficiency.

[0063] It should be noted that the vibration element itself and the installation method are both existing technologies, which are not shown in the accompanying drawings and will not be described in detail here.

[0064] Further, if Figure 12-14 As shown, the driving assembly 24 includes a second telescopic frame 241 movably arranged between the two mother molds 11, a vortex groove 242 arranged on the second telescopic frame 241 and slidably connected to the sandblasting tube 231, a driving rod 243 rotatably arranged on the second telescopic frame 241 and slidably connected to the sandblasting tube 231 and used to drive the sandblasting tube 231 to slide along the vortex groove 242, a support frame 244 rotatably arranged on the sandblasting tube 231, a pushing arm 245 rotatably arranged on the support frame 244, and a second elastic member arranged on the support frame 244 and used to force the pushing arm 245 to push the end of the sandblasting tube 231 to bend to the bottom of the exhaust assembly 22.

[0065] In this embodiment, the vortex groove 242 is provided to cooperate with the driving rod 243 to drive the sandblasting tube 231 to move along the vortex line, thereby realizing the filling of the molding sand from the inside to the outside or from the outside to the inside, and the second telescopic frame 241 is cooperated with to drive the sandblasting tube 231 to move and extend into the upper sand box 12 and the lower sand box 13, so that the filling effect is good. At the same time, with the assistance of the rotating support frame 244 and the second elastic member, the pushing arm 245 can be adjusted to push the bending direction of the end of the sandblasting tube 231, so that the sandblasting direction can be changed, and at the same time, it can be extended into the obstruction below the exhaust mechanism or other obstruction for positioning sandblasting, thereby further improving the filling effect.

[0066] In detail, when in use, the second telescopic frame 241 moves and retracts so that the sandblasting tube 231 moves to the top of the upper sand box 12, and then drives the sandblasting tube 231 to be filled with molding sand from the inside out through the vortex groove 242 and the driving rod 243. When the sandblasting tube 231 moves to the vicinity of the obstruction, the second telescopic frame 241 retracts and pushes the push arm 245 to push the bent end of the sandblasting tube 231 to the bottom of the obstruction for positioning sandblasting. As the vortex of the sandblasting tube 231 moves, the obstruction forces the bent end of the sandblasting tube 231 to move to the bottom of the obstruction. As the sand tube 231 tends to be vertical, the second telescopic frame 241 contracts to remove the sand blasting tube 231 from the obstruction, thereby improving the automation of sand blasting and the sand blasting effect; when the second telescopic frame 241 moves and retracts to sandblast the lower sand box 13, the vortex groove 242 cooperates with the driving rod 243 to drive the sand blasting tube 231 to directly fill the molding sand from the outside to the inside, avoiding the resetting work of the sand blasting tube 231, and at the same time, the rotating support frame 244 can change the bending direction of the end of the sand blasting tube 231 to adapt to the sand blasting of the lower sand box 13.

[0067] It should be noted that the first elastic member 155 and the second elastic member can be coil springs, leaf springs or torsion springs, etc., and their installation methods are all existing technologies and will not be described in detail here. The second elastic member is not drawn in the accompanying drawings.

[0068] Further, if Figure 15-17 As shown, the demolding mechanism 5 includes a sand shaker 51 arranged on the outside of the smelting furnace 4 and used to remove the sand box mechanism 1 and the molding sand inside it, two arc-shaped positioning plates 53 that are opened and closed on the machine table 52 outside the sand shaker 51 and are used to clamp and position the outer ring surface of the main oil cylinder 7, a pulling arm 54 that is movably arranged on the machine table 52 and is used to pull the partition plate 332 to disassemble and demold, a top column 55 that is movably arranged above the machine table 52 and is used to push the inner mold column 331 to demold, a cutting machine 56 that is movably arranged on the machine table 52 and is used to cut the connection 71 between the main oil cylinder 7 and the auxiliary oil cylinder 8, and a pressing needle 57 that is arranged on the top column 55 and is used to press out a pressing groove 73 at the cutting part 72 on the main oil cylinder 7.

[0069] In this embodiment, after the sand box mechanism 1 is removed by setting up a sand-dropping machine 51, the outer ring surface of the main oil cylinder 7 is positioned in conjunction with the arc-shaped positioning plate 53, and then the pulling arm 54, the top column 55 and the cutting machine 56 are cooperated to realize the cutting, separation and molding after demolding, and then the pressing needle 57 is assisted to press out the cutting part 72 on the main oil cylinder 7 to form a pressing groove 73 for detection by the detection mechanism 6.

[0070] It should be noted that the partition plate 332 is provided with a pulling groove 58 for connecting and pulling with the pulling arm 54; the sand-falling machine 51, the cutting machine 56 and the detection mechanism 6 themselves and their installation methods are all existing technologies and will not be described in detail here.

[0071] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0072] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0073] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A casting process for ductile iron castings of a locking clutch oil cylinder body, characterized in that: The following steps are involved: Step 1: Sand box molding process, designing two master molds of the sand box mechanism according to the upper and lower outer contours of the casting, and positioning and fixing the upper sand box and the lower sand box of the sand box mechanism on the two master molds respectively, and then using the sand blasting mechanism to evenly spray the molding sand into the upper sand box and the lower sand box until the molding sand solidifies and the upper sand box and the lower sand box are demolded; Step 2: Inner mold assembly process, the inner mold assembly of the inner mold mechanism is designed according to the inner contour of the casting, and the inner mold assembly is positioned and assembled into the lower flask to form a main cavity between the inner mold assembly and the lower flask. Then, the upper flask is positioned and assembled on the lower flask to form a secondary cavity connected to the main cavity between the inner mold assembly and the upper flask; Step 3: Casting process, pouring the ductile iron melt in the smelting furnace into the main cavity and the auxiliary cavity through the pouring port of the upper sand box, and after the ductile iron melt cools and solidifies to form the main cylinder and auxiliary cylinder of the clutch, the molding sand is loosened and separated by the mold removal mechanism and the inner mold assembly is removed, so that the main cylinder and the auxiliary cylinder can be cut, separated and formed.

2. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 1, characterized in that: The locking clutch oil cylinder body ductile iron casting process further comprises the following steps: Step 4: Casting inspection process, after the main oil cylinder and the auxiliary oil cylinder are cut and separated by the demoulding mechanism, the formed cut portion is positioned and grooved, and then the composition of the ductile iron in the groove is inspected and analyzed by the inspection mechanism.

3. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 1, characterized in that: In the casting process, the auxiliary cavity for forming the auxiliary oil cylinder is poured first, and after the upper flask, the lower flask and the inner mold assembly are preheated, the main cavity for forming the main oil cylinder is poured.

4. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 1, characterized in that: The sand box mechanism includes two master molds arranged on the sandblasting mechanism, a conveying component arranged on the outside of the sandblasting mechanism and used to position and convey the upper sand box and the lower sand box to the two master molds respectively, and a positioning component arranged on the upper sand box and the lower sand box and used to position and connect the corresponding master molds.

5. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 4, characterized in that: The positioning assembly includes at least two positioning posts arranged on the upper sand box and the sandblasting mechanism, at least two positioning sleeves arranged on the lower sand box and the sandblasting mechanism and used to sleeve on the positioning posts, a guide structure arranged on the positioning posts and / or the positioning sleeves, a connecting groove formed on the outer annular surface of the positioning post, a connecting ball arranged radially movably on the inner wall of the positioning sleeve, and a first elastic member arranged on the positioning sleeve and used to force the connecting ball to connect to the connecting groove.

6. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 5, characterized in that: The inner mold mechanism includes a support seat arranged on the outside of the smelting furnace, a support column arranged on the support seat and cooperating with the positioning sleeve to position and support the lower sand box, an inner mold assembly arranged in the lower sand box, and an assembly assembly arranged on the outside of the support seat and used to position and assemble the inner mold assembly into the lower sand box.

7. The casting process of ductile iron casting of locking clutch oil cylinder according to claim 6, characterized in that: The inner mold assembly includes an inner mold column arranged in the lower sand box, at least two partition plates spliced ​​between the outer annular surface of the inner mold column and the inner annular surface of the lower sand box and used to separate the main mold cavity and the auxiliary mold cavity, a forming mold arranged on the partition plate and extending into the auxiliary mold cavity, and a pouring channel formed on the forming mold and the partition plate and connected to the main mold cavity and the auxiliary mold cavity, and the pouring channel is formed at the splicing between the two partition plates.

8. The process for casting a ductile iron casting of a locking clutch cylinder according to claim 7, characterized in that: The assembly component includes a conveyor belt arranged on the outside of the support seat and used to convey the inner mold assembly, a first telescopic frame movably arranged directly above the conveyor belt and the support platform, an arc-shaped clamping plate opened and closed on the first telescopic frame and used to clamp the outer annular surface of the forming mold, and a positioning rod arranged on the first telescopic frame and cooperating with the positioning sleeve to guide and position the inner mold assembly.

9. The locking clutch oil cylinder body ductile iron casting process according to claim 1, characterized in that: The sandblasting mechanism includes a base for mounting the master mold, an exhaust assembly arranged on the base and inserted into the upper sand box and the lower sand box, a sandblasting machine arranged above the base, and a driving assembly arranged on the sandblasting machine and used to drive the sandblasting tube on the sandblasting machine to evenly spray the molding sand into the upper sand box and the lower sand box.

10. The process for casting a ductile iron casting of a locking clutch oil cylinder according to claim 9, characterized in that: The driving assembly includes a second telescopic frame movably arranged between the two master molds, a vortex groove arranged on the second telescopic frame and slidably connected to the sandblasting tube, a driving rod rotatably arranged on the second telescopic frame and slidably connected to the sandblasting tube and used to drive the sandblasting tube to slide along the vortex groove, a support frame rotatably arranged on the sandblasting tube, a pushing arm rotatably arranged on the support frame, and a second elastic member arranged on the support frame and used to force the pushing arm to push the end of the sandblasting tube to bend below the exhaust assembly.

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