Shape correcting tool applied to large-size ceramic core green body

Abstract

The utility model discloses a shape righting tool applied to a large-size ceramic core green body. The shape righting tool comprises a fixing support, a fixing base, a hydraulic cylinder, a hydraulic telescopic shaft, an upper shape righting mold, a base and a lower shape righting mold. The fixing seat is fixed to the top of the fixing support, and the base is fixed to the bottom of the fixing support. The hydraulic cylinder is fixedly installed in the middle of the fixing base, the lower portion of the hydraulic cylinder is connected with the hydraulic telescopic shaft, and the bottom of the hydraulic telescopic shaft is connected with the upper shape correcting mold. The lower shape righting mold is mounted at the upper part of the base; the upper shape righting mold and the lower shape righting mold are both of a structure with a groove and are correspondingly arranged up and down, and after the upper shape righting mold and the lower shape righting mold are closed, a shape righting cavity used for bearing a ceramic core green body is formed between the upper shape righting mold and the lower shape righting mold; the device is reasonable in structure and strong in maneuverability, ensures that the large-size ceramic core green body is effectively corrected, ensures that the deformation is controlled within a process requirement range, and greatly improves the size precision and the qualified rate of the large-size ceramic core green body.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic core production, and particularly provides an orthopedic tooling applied to large-size green ceramic cores. Background Art

[0002] Ceramic cores are widely used in the precision casting processes of products such as golf club heads, hollow blades of aero-engine turbines in the aviation industry, hollow blades of large-thrust engines for ships, large thin-walled aluminum alloy castings, and impellers for chemical industry.

[0003] Stresses generated during the processes of forming, demolding, and cooling to room temperature of the green ceramic core will cause the green ceramic core to deform. For the edges with a relatively thin cross-section, the deformation is more serious due to a faster cooling rate. In order to eliminate stress, reduce deformation, and improve the shape and position accuracy, a metal mold is used to orthopedically correct the green ceramic core prone to deformation. However, the metal mold for orthopedically correcting large-size green ceramic cores seriously affects the orthopedic effect of large-size green ceramic cores due to factors such as large weight and difficult operation.

[0004] Therefore, designing an orthopedic tooling for large-size green ceramic cores with reasonable structure and strong operability to improve the dimensional accuracy and qualification rate of large-size green ceramic cores has become an urgent problem to be solved. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide an orthopedic tooling applied to large-size green ceramic cores to solve problems such as large weight and difficult operation of the existing orthopedic metal mold.

[0006] The technical solution provided by the utility model is: an orthopedic tooling applied to large-size green ceramic cores, including a fixed bracket, a fixed seat, a hydraulic cylinder, a hydraulic telescopic shaft, an upper orthopedic mold, a base, and a lower orthopedic mold;

[0007] The fixed seat is fixed to the top of the fixed bracket, and the base is fixed to the bottom of the fixed bracket;

[0008] The hydraulic cylinder is fixedly installed in the middle of the fixed seat. The bottom of the hydraulic cylinder is connected to the hydraulic telescopic shaft, and the bottom of the hydraulic telescopic shaft is connected to the upper orthopedic mold;

[0009] The lower orthopedic mold is installed on the upper part of the base;

[0010] Both the upper orthopedic mold and the lower orthopedic mold are structures with grooves and are arranged corresponding to each other up and down. After the upper orthopedic mold and the lower orthopedic mold are closed, an orthopedic cavity for receiving the green ceramic core is formed therebetween;

[0011] An air extraction module is provided in the lower orthopedic mold;

[0012] The bottom surface of the base is embedded with a heating module.

[0013] Preferably, orthopedic positioning columns are respectively arranged in each corner area of the upper orthopedic mold, and a positioning groove is arranged in the middle edge area of the upper orthopedic mold; positioning grooves are arranged in each corner area of the lower orthopedic mold, and a positioning projection module is arranged in the middle edge area of the lower orthopedic mold;

[0014] The orthopedic positioning columns are matched and corresponding to the positioning grooves; the positioning grooves are matched and corresponding to the positioning projection modules.

[0015] Preferably, the air extraction module includes a plurality of adsorption holes, an adsorption cavity, a rubber tube, a vacuum pumping unit, and a pneumatic switch;

[0016] The plurality of adsorption holes are densely distributed on the surface of the groove structure of the lower orthopedic mold, the adsorption cavity is arranged inside the lower orthopedic mold, the adsorption holes are communicated with the adsorption cavity, the adsorption cavity is communicated with the rubber tube, the rubber tube extends out of the lower orthopedic mold and is connected to the vacuum pumping unit, and the pneumatic switch is installed on the rubber tube.

[0017] Preferably, the tooling includes a control cabinet, and the control cabinet is used to control the start and stop of the hydraulic cylinder operation and the preheating temperature of the heating module; the control cabinet is arranged on one side of the fixed bracket.

[0018] A safety protection cover is arranged outside the heating module.

[0019] The aperture of the adsorption holes on the surface of the groove structure of the lower orthopedic mold is 1-2 mm.

[0020] The orthopedic tooling for large-size green ceramic cores provided by the present utility model has a reasonable overall structure and is convenient to use; through the mutual cooperation of its various components, the automatic lifting and opening and closing of the upper and lower orthopedic molds are realized, and the problem that the existing orthopedic mold for large-size green ceramic cores is heavy and inconvenient for workers to operate the orthopedic mold for large-size green ceramic cores is solved. Description of the Drawings

[0021] The following further describes the present utility model in detail in conjunction with the drawings and embodiments:

[0022] Figure 1 It is a schematic diagram of the overall structure of the orthopedic tooling for large-size green ceramic cores provided by the present utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the upper and lower orthopedic molds provided by the present utility model;

[0024] Figure 3 It is a schematic diagram of the lower orthopedic tool provided by the present utility model;

[0025] Figure 4 Schematic diagram of the heating module provided by the present utility model. Specific embodiments

[0026] The present utility model will be further explained below in conjunction with specific implementation schemes, but the present utility model is not limited thereto.

[0027] Existing metal molds for straightening large-sized green ceramic cores are manually operated. The upper mold is manually moved onto the green ceramic core to be straightened, which has problems such as time-consuming, laborious, inaccurate positioning, and mold displacement. For this reason, the present utility model provides a straightening tooling for large-sized green ceramic cores, including a fixed bracket 1, a fixed seat 2, a hydraulic cylinder 3, a hydraulic telescopic shaft 4, an upper straightening mold 5, a base 6, and a lower straightening mold 7.

[0028] The fixed seat is fixed on the top of the fixed bracket 1, and the base 6 is fixed at the bottom of the fixed bracket 1. The overall fixed frame is formed by the fixed bracket 1, the fixed seat 2, and the base 6.

[0029] The hydraulic cylinder 3 is fixedly installed in the middle of the fixed seat 2. The bottom of the hydraulic cylinder 3 is connected to the hydraulic telescopic shaft 4, and the bottom of the hydraulic telescopic shaft 4 is connected to the upper straightening mold 5. The upper straightening mold 5 is driven to lift and lower by the hydraulic cylinder.

[0030] The lower straightening mold 7 is installed on the upper part of the base 6.

[0031] Both the upper straightening mold 5 and the lower straightening mold 7 are structures with grooves and are arranged corresponding to each other up and down. After the upper straightening mold 5 and the lower straightening mold 7 are closed, a straightening cavity 8 for receiving the green ceramic core is formed therebetween.

[0032] An air extraction module is provided in the lower straightening mold 7. Through this air extraction module, the large-sized green ceramic core is closely attached to the lower straightening mold, reducing the manual operation error of the staff and improving the straightening dimension accuracy of the large-sized green ceramic core. Specifically, the air extraction module includes a plurality of adsorption holes 13, an adsorption cavity 14, a rubber tube 15, an air extraction unit, and a pneumatic switch 16.

[0033] The plurality of adsorption holes 13 are densely distributed on the surface of the groove structure of the lower straightening mold 7. The adsorption cavity 14 is arranged inside the lower straightening mold 7. The adsorption holes 13 are communicated with the adsorption cavity 14. The adsorption cavity 14 is communicated with the rubber tube 15. The rubber tube 15 extends out of the lower straightening mold 7 and is connected to the air extraction unit. The pneumatic switch 16 is installed on the rubber tube 15. The above air extraction unit can be a vacuum pump in the prior art, etc.

[0034] A heating module 18 is embedded in the bottom surface of the base 6. Through this heating module, preheating of the lower orthopedic mold is realized, preventing large-sized green ceramic cores from contacting the low-temperature lower orthopedic mold and generating large thermal stresses, which may cause structural cracks inside the large-sized green ceramic cores. The heating module 18 can be a heating wire or other structures in the prior art, as long as it can achieve heating of the base surface.

[0035] The input end of the hydraulic cylinder 3 is electrically connected to the output end of the mains power supply.

[0036] Orthopedic positioning columns 9 are respectively provided at each corner area of the upper orthopedic mold 5, and a positioning groove 10 is provided at the middle edge area of the upper orthopedic mold 5; positioning grooves 11 are provided at each corner area of the lower orthopedic mold 7, and a positioning projection module 12 is provided at the middle edge area of the lower orthopedic mold 7; the orthopedic positioning columns 9 match and correspond to the positioning groove 10; the positioning groove 10 matches and corresponds to the positioning projection module 12. The above limiting components ensure accurate film combination positions of the upper and lower orthopedic molds.

[0037] The structure of the present utility model further includes a control cabinet 17, which is used to control the start and stop of the hydraulic cylinder 3 and the preheating temperature of the heating module 18; the control cabinet 17 is arranged on one side of the fixed bracket 1. A display screen 1701 and control buttons 1702 can be respectively arranged on the control cabinet.

[0038] A safety protection cover 19 is arranged outside the heating module 18 to prevent operators from being scalded.

[0039] The aperture of the adsorption holes 13 on the surface of the groove structure of the lower orthopedic mold 7 is 1 - 2 mm.

[0040] The working principle and usage process of the present utility model: First, set the working temperature parameters of the base 6 through the temperature button on the control cabinet 17, and heat up and preheat the base 6 through the heating module 18 to make the temperature of the lower orthopedic mold 7 reach the required normal working temperature state, thereby achieving the purpose of heating and preheating the lower orthopedic mold 7 by the base 6. Usually, the temperature range for using the lower orthopedic mold 7 is 20°C - 30°C.

[0041] Then click the raise button on the control cabinet 17 to slowly raise the upper orthopedic mold 5 through the hydraulic cylinder 3 and the hydraulic telescopic shaft 4, place the formed large-sized green ceramic core blank in the orthopedic cavity 8, and adjust the position to make the blank position accurate and appropriate; then turn on the pneumatic switch 16 to start the vacuum pumping system, so that the large-sized green ceramic core blank is closely attached to the lower orthopedic mold 16. The vacuum degree of the vacuum pumping system is not greater than -2 Mpa.

[0042] Click the down button on the control cabinet 17 to slowly lower the upper orthopedic mold 5. The upper orthopedic mold 5 is closed with the lower orthopedic mold 7 to orthopedically correct the large-size ceramic core. The purpose of orthopedic correction is to correct the geometric shape of the large-size ceramic core and eliminate the thermal deformation stress. After maintaining for a period of time, turn off the pneumatic switch 16, raise the upper orthopedic mold 5, and take out the green body of the large-size ceramic core to complete one orthopedic work.

[0043] In summary, it can be seen that the structure of the present utility model is reasonable and has strong maneuverability. After application, it can ensure that the green body of the large-size ceramic core is effectively corrected, and the deformation amount is controlled within the process requirements, greatly improving the dimensional accuracy and qualification rate of the green body of the large-size ceramic core.

[0044] The specific embodiments of the present utility model are written in a progressive manner, emphasizing the differences between each embodiment, and the similar parts can be referred to each other.

[0045] The above has made a detailed description of the embodiments of the present utility model in conjunction with the drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the purpose of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. Orthopedic tooling for large-size ceramic core greenware, characterized in that: It comprises a fixed bracket (1), a fixed seat (2), a hydraulic cylinder (3), a hydraulic telescopic shaft (4), an upper orthopedic mold (5), a base (6), and a lower orthopedic mold (7); The fixing seat (2) is fixed to the top of the fixing bracket (1), and the base (6) is fixed to the bottom of the fixing bracket (1); The hydraulic cylinder (3) is fixedly mounted in the middle of the fixed seat (2), the lower part of the hydraulic cylinder (3) is connected to the hydraulic telescopic shaft (4), and the bottom of the hydraulic telescopic shaft (4) is connected to the upper orthopedic mold (5); The lower orthopedic mold (7) is installed on the upper part of the base (6); The upper orthopedic mold (5) and the lower orthopedic mold (7) are both structures with grooves and are arranged correspondingly from top to bottom. After the upper orthopedic mold (5) and the lower orthopedic mold (7) are closed, an orthopedic cavity (8) for receiving a ceramic core green body is formed therebetween; The lower orthopedic mold (7) is provided with an air extraction module; A heating module (18) is embedded in the bottom surface of the base (6).

2. The orthopedic tooling for large-size ceramic core greenware according to claim 1, characterized in that: Each corner area of ​​the upper orthopedic mold (5) is respectively provided with an orthopedic positioning column (9), and the middle edge area of ​​the upper orthopedic mold (5) is provided with a positioning groove (10); each corner area of ​​the lower orthopedic mold (7) is provided with a positioning groove (11), and the middle edge area of ​​the lower orthopedic mold (7) is provided with a positioning protrusion module (12); The orthopedic positioning column (9) matches and corresponds to the positioning groove (10); the positioning groove (10) matches and corresponds to the positioning protrusion module (12).

3. The orthopedic tooling for large-size ceramic core greenware according to claim 1, characterized in that: The air extraction module comprises a plurality of adsorption holes (13), an adsorption cavity (14), a hose (15), a vacuum extraction unit, and a pneumatic switch (16); The plurality of adsorption holes (13) are densely distributed on the groove structure surface of the lower orthopedic mold (7); the adsorption cavity (14) is arranged inside the lower orthopedic mold (7); the adsorption holes (13) are connected to the adsorption cavity (14); the adsorption cavity (14) is connected to a rubber hose (15); the rubber hose (15) extends out of the lower orthopedic mold (7) and is connected to a vacuum unit; the pneumatic switch (16) is installed on the rubber hose (15).

4. The orthopedic tooling for large-size ceramic core greenware according to claim 1, characterized in that: It comprises a control cabinet (17), wherein the control cabinet (17) is used to control the start and stop of the hydraulic cylinder (3) and the preheating temperature of the heating module (18); the control cabinet (17) is arranged on one side of the fixed bracket (1).

5. The orthopedic tooling for large-size ceramic core greenware according to claim 1, characterized in that: A safety protection cover (19) is arranged outside the heating module (18).

6. The orthopedic tooling for large-size ceramic core greenware according to claim 3, characterized in that: The adsorption holes (13) on the surface of the groove structure of the lower orthopedic mold (7) have a hole diameter of 1-2 mm.

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