Feed stabilization device and control method for small crucible for aviation single crystal blades

Abstract

The present invention belongs to the technical field of crucibles, and discloses a feeding stabilization device for a small crucible for aviation single crystal blades and a control method thereof, including a stabilizer, a crucible heating assembly and a rotating assembly; the stabilizer includes a bracket and a damper, and two dampers are respectively arranged on the right side and the rear side of the bracket; the crucible heating assembly is installed directly above the stabilizer; and the rotating assembly is fixedly connected to the stabilizer. The present invention effectively reduces the probability of molten metal liquid splashing caused by the large acceleration caused by the sudden stop and move of the robot arm by arranging a stabilizer under the crucible, arranging dampers on the rear and front sides of the stabilizer, and connecting them to the crucible bracket, thereby ensuring the reliability of the vacuum directional solidification furnace equipment; by analyzing the isobaric surface and static pressure distribution law of the crucible liquid surface, and by calculating the poured volume, the real-time height of the liquid surface is effectively predicted, and by adjusting the angular velocity of the robot arm in real time, the production efficiency is improved and energy is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of crucibles, and in particular relates to a feeding stabilization device for a small crucible for aviation single crystal blades and a control method thereof. Background Art

[0002] Small crucibles for aviation single crystal blades are widely used in vacuum directional solidification furnaces and are indispensable mechanical equipment for single crystal blades in the aerospace manufacturing field. As the requirements for single crystal blade performance, manufacturing efficiency and yield rate continue to increase, stability during the casting process is very important. In actual situations, due to the high temperature and high vacuum in the vacuum directional solidification furnace, it is impossible to directly monitor the liquid level through the camera, and the robot arm stops and moves suddenly, which easily causes the high-temperature molten metal liquid to splash out of the crucible.

[0003] Through the above analysis, the problems and defects of the existing technology are: the existing small crucibles for aviation single crystal blades cannot directly monitor the liquid level through the camera, and the sudden stop and move of the robotic arm can easily cause the high-temperature molten metal liquid to splash out of the crucible. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a feeding stabilization device for a small crucible for aviation single crystal blades and a control method thereof.

[0005] The present invention is implemented in this way: a feeding stabilizing device for a small crucible for an aviation single crystal blade comprises:

[0006] stabilizers, crucible heating assemblies, and rotating assemblies;

[0007] The stabilizer comprises a bracket and a damper, wherein two dampers are provided, and the two dampers are respectively provided on the right side and the rear side of the bracket;

[0008] The crucible heating assembly is installed directly above the stabilizer and is used to heat the crucible;

[0009] The rotating assembly is fixedly connected to the stabilizer and is used to drive the stabilizer to rotate.

[0010] Furthermore, the damper includes a fastening and rotating mechanism, a shock absorbing cylinder, a damping rod and a connecting and rotating mechanism. There are two fastening and rotating mechanisms, which are inserted into the shock absorbing cylinder through interference fit to realize the rotation function; there are two shock absorbing cylinders, which are respectively connected to the left and right sides of the damping rod through clearance fit; the two ends of the connecting and rotating mechanism are respectively connected to the fastening and rotating mechanism and the bracket.

[0011] Furthermore, the rotation centers of the shock absorbing cylinder and the damping rod are on the same horizontal line; the rotation centers of the connecting rotating mechanism, the fastening rotating mechanism and the shock absorbing cylinder are on the same horizontal line.

[0012] Furthermore, the shock absorbing cylinder contains an inert gas for shock absorbing and buffering.

[0013] Furthermore, the stabilizer is made entirely of stainless steel, and the bracket is a rectangular structure.

[0014] Further, the crucible heating assembly includes a fixed bracket, a fixed rod, a crucible and a heating coil;

[0015] The fixed bracket is used to connect with the fixed rod and the crucible;

[0016] The fixing rod is used to connect with the heating coil;

[0017] The crucible is arranged above the support, and the heating coil surrounds the crucible.

[0018] Furthermore, the fixing rods are cylindrical and there are four groups in total. The four groups of fixing rods are respectively arranged on the front, back, left and right sides of the fixing bracket, and the number of fixing rods arranged in each group is 11.

[0019] Furthermore, the rotating assembly includes a connecting angle steel and a rotating arm; the connecting angle steel is connected to the lower end of the stabilizer by welding; and the rotating arm is connected to the connecting angle steel by welding.

[0020] Another object of the present invention is to provide a control method for a feeding stabilization device of a small crucible for an aerospace single crystal blade, the control method for a feeding stabilization device of a small crucible for an aerospace single crystal blade comprising:

[0021] Step 1: The rotating mechanism drives the stabilizer to feed forward or backward. When an emergency stop occurs, the right damper of the stabilizer generates a force in the opposite direction to stabilize the crucible.

[0022] Step 2: The rotating mechanism drives the stabilizer to rotate clockwise or counterclockwise. When an emergency stop occurs, the rear damper of the stabilizer generates a force in the opposite direction to stabilize the crucible.

[0023] Step three, when the small crucible is poured, the rotation angular velocity and the liquid level measurement method are monitored, and the difference between the initial molten metal volume V1 and the calculated poured molten metal volume V2 is compared with the initial molten metal volume V1, and multiple prompt intervals are set. The rotation angular velocity ω is controlled by the program, and the rotation angular velocity ω can be increased or decreased.

[0024] Further, the liquid level measurement method in step three includes:

[0025] According to the rotation angular velocity ω obtained by monitoring, the initial liquid level h, the initial size of the crucible, the cup depth H, the bottom diameter D, and the working time t, the rotation angle is θ=ωt, and the ellipse equation is obtained as

[0026] Then when the working time is Δt, the volume V of the liquid poured out is approximately The volume of the molten metal poured out can be estimated using multiple Δt times, and the expression is:

[0027] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0028] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving the problems, the technical solutions to be protected by the present invention and the results and data during the research and development process are closely combined to analyze in detail and deeply how the technical solutions of the present invention solve the technical problems, and some creative technical effects brought about after solving the problems. The specific description is as follows:

[0029] The feed stabilization device for a small crucible for aviation single crystal blades provided by the present invention has a stabilizer arranged under the crucible, and dampers are arranged on the rear and front sides of the stabilizer, which are connected to the crucible support, thereby effectively reducing the probability of splashing of molten metal liquid caused by the large acceleration brought about by the sudden stop and move of the robot arm, and ensuring the reliability of the vacuum directional solidification furnace equipment; by analyzing the isobaric surface of the crucible liquid surface and the static pressure distribution law, the poured volume is derived by mathematical methods, and the real-time height of the liquid surface is effectively predicted, and the angular velocity of the robot arm is adjusted in real time to improve production efficiency and save energy.

[0030] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the present invention are described in detail as follows:

[0031] The stabilizing device in the present invention ensures the reliability of the vacuum directional solidification furnace equipment, and the liquid level height measuring method improves production efficiency and saves energy by adjusting the angular velocity of the robot arm in real time.

[0032] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following aspects:

[0033] The technical solution of the present invention fills the technical gap in the industry at home and abroad: in the existing single crystal blade casting field, there is no stabilizing device for the relevant crucible. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of a feeding stabilization device for a small crucible for aviation single crystal blades provided by an embodiment of the present invention;

[0035] Figure 2 is a structural schematic diagram of a stabilizer provided by an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of a damper provided by an embodiment of the present invention;

[0037] Figure 4 is an exploded diagram of a damper provided by an embodiment of the present invention;

[0038] Figure 5 is a schematic structural diagram of a crucible heating assembly provided by an embodiment of the present invention;

[0039] Figure 6 is a structural separation diagram of a rotating assembly provided by an embodiment of the present invention;

[0040] Figure 7 is a structural schematic diagram of a fastening and rotating mechanism provided by an embodiment of the present invention;

[0041] Figure 8 is a schematic diagram of the structure of a shock absorbing cylinder provided in an embodiment of the present invention;

[0042] Fig. 9 is a schematic diagram of the damping rod structure provided by an embodiment of the present invention;

[0043] Fig.10 is a schematic structural diagram of a connecting and rotating mechanism provided in an embodiment of the present invention;

[0044] Fig.11 is a schematic diagram of relative positions of dampers provided in an embodiment of the present invention;

[0045] Fig.12 Schematic diagram of a method for calculating liquid level provided by an embodiment of the present invention;

[0046] In the figure: 1. stabilizer; 11. bracket; 12. damper; 121. fastening rotating mechanism; 122. shock-absorbing cylinder; 123. damping rod; 124. connecting rotating mechanism; 2. heating component; 21. fixing bracket; 22. fixing rod; 23. crucible; 24. heating coil; 3. rotating component; 31. connecting angle steel; 32. rotating arm. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In order to enable those skilled in the art to fully understand how to implement the present invention in detail, this section is an explanatory embodiment that expands and describes the technical solution of the claims.

[0049] like Figures 1 to 11 As shown, the feeding stabilization device for a small crucible for aviation single crystal blades provided in an embodiment of the present invention includes a stabilizer 1, a crucible heating component 2 and a rotating component 3.

[0050] The stabilizer 1 in the embodiment of the present invention is rectangular and made of stainless steel, and includes a bracket 11 and a damper 12; the dampers 12 are provided in two numbers, which are respectively provided on the right side and the rear side of the stabilizer;

[0051] The damper 12 in the embodiment of the present invention comprises a fastening and rotating mechanism 121, a damping cylinder 122, a damping rod 123 and a connecting and rotating mechanism 124. The number of the fastening and rotating mechanisms 121 is 2, which are inserted into the damping cylinder by interference fit to realize the rotation function; the number of the damping cylinders 122 is 2, which are respectively connected to the damping rods by clearance fit, and contain inert gas inside to play the role of shock absorption and buffering; the damping rod 123 is a cylindrical rod, and the left and right sides are respectively connected to the damping cylinder by clearance fit; the connecting and rotating mechanism 124 is set in number 1, which is respectively connected to the fastening and rotating mechanism and the bracket; the crucible heating assembly 2 is installed directly above the stabilizer, and comprises a fixed bracket 21, a fixed rod 22, a crucible 23, and a heating coil 24; the fixed bracket 21 is used to connect with the fixed rod and the crucible;

[0052] The fixing rod 22 in the embodiment of the present invention is cylindrical, with a total of 4 groups, which are respectively arranged on the front, back, left and right sides of the fixing bracket, with 11 rods in each group, which are used to connect with the heating coil; the crucible 23 is arranged above the bracket; the heating coil 24 surrounds the crucible; the rotating assembly 3 includes a connecting angle steel 31 and a rotating arm 32; the connecting angle steel 31 is arranged in number 1, which is connected to the lower end of the stabilizer by welding; the rotating arm 32 is arranged in number 1, which is connected to the connecting angle steel by welding.

[0053] The control method of the feeding stabilization device of the small crucible for the aviation single crystal blade provided by the embodiment of the present invention comprises:

[0054] (1) When the rotating mechanism drives the stabilizer to feed forward or backward and produces an emergency stop, the right damping mechanism generates a force in the opposite direction, and the stabilizer stabilizes the crucible to prevent the high-temperature molten metal liquid from spilling;

[0055] (2) When the rotating mechanism drives the stabilizer to rotate clockwise or counterclockwise, and an emergency stop occurs, the rear damping mechanism generates a force in the opposite direction, and the stabilizer stabilizes the crucible to prevent the high-temperature molten metal liquid from spilling;

[0056] (3) When the small crucible is poured, the rotation angular velocity and the liquid level measurement method are monitored, and the difference between the initial molten metal volume V1 and the calculated poured molten metal volume V2 is compared with V1, and multiple prompt intervals are set. The rotation angular velocity ω is controlled by the program, and the rotation angular velocity ω is selected to be increased or decreased to improve production efficiency.

[0057] like Fig.12 As shown, the liquid level measurement method provided by the embodiment of the present invention is as follows: according to the minimum potential energy principle and the principle of fluid statics It can be seen that the liquid surface of the crucible is always horizontal during the pouring process. According to the rotation angular velocity obtained by monitoring, ω, the initial liquid surface height, h, the initial size of the crucible, the cup depth, H, the bottom diameter, D, and the working time, t, the rotation angle is θ = ωt, and the ellipse equation can be obtained as Then when the working time is small enough to be Δt, the volume V of the liquid poured out can be approximated as The volume of the molten metal poured can be accurately estimated by taking multiple Δt times, and its expression can be written as

[0058] In order to prove the creativity and technical value of the technical solution of the present invention, this section provides application examples of the claimed technical solution on specific products or related technologies.

[0059] The feeding stabilizing device for a small crucible for aerospace single crystal blades provided in an embodiment of the present invention can be applied to a small crucible for aerospace single crystal blades.

[0060] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0061] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A control method for a feeding stabilization device of a small crucible for an aviation single crystal blade, characterized in that: The feeding stabilization device of the small crucible for aviation single crystal blades includes: stabilizers, crucible heating assemblies, and rotating assemblies; The stabilizer comprises a bracket and a damper, wherein two dampers are provided, and the two dampers are respectively provided on the right side and the rear side of the bracket; The crucible heating assembly is installed directly above the stabilizer and is used to heat the crucible; The rotating assembly is fixedly connected to the stabilizer and is used to drive the stabilizer to rotate; The damper comprises a fastening rotation mechanism, a damping cylinder, a damping rod and a connecting rotation mechanism. The fastening rotation mechanism is provided with two in total and inserted into the damping cylinder through interference fit to realize the rotation function; the damping cylinder is provided with two in total and is respectively connected to the left and right sides of the damping rod through clearance fit; the two ends of the connecting rotation mechanism are respectively connected to the fastening rotation mechanism and the bracket; The rotation centers of the shock absorbing cylinder and the damping rod are on the same horizontal line; the rotation centers of the connecting rotating mechanism, the fastening rotating mechanism and the shock absorbing cylinder are on the same horizontal line; The control method of the feeding stabilization device of the small crucible for the aviation single crystal blade includes: Step 1: The rotating mechanism drives the stabilizer to feed forward or backward. When an emergency stop occurs, the right damper of the stabilizer generates a force in the opposite direction to stabilize the crucible. Step 2: The rotating mechanism drives the stabilizer to rotate clockwise or counterclockwise. When an emergency stop occurs, the rear damper of the stabilizer generates a force in the opposite direction to stabilize the crucible. Step three, when the small crucible is poured, the rotation angular velocity and the liquid level measurement method are monitored, and the difference between the initial molten metal volume V1 and the calculated poured molten metal volume V2 is compared with the initial molten metal volume V1, and multiple prompt intervals are set. The rotation angular velocity ω is controlled by the program, and the rotation angular velocity ω can be increased or decreased.

2. The control method of the feeding stabilization device of the small crucible for aerospace single crystal blades according to claim 1, characterized in that: The shock absorbing cylinder contains inert gas for shock absorbing and buffering.

3. The control method of the feeding stabilization device of the small crucible for aerospace single crystal blades according to claim 1, characterized in that: The stabilizer is made of stainless steel as a whole, and the bracket is a rectangular structure.

4. The control method of the feeding stabilization device of the small crucible for aerospace single crystal blades according to claim 1, characterized in that: The crucible heating assembly comprises a fixing bracket, a fixing rod, a crucible and a heating coil; The fixed bracket is used to connect with the fixed rod and the crucible; The fixing rod is used to connect with the heating coil; The crucible is arranged above the support, and the heating coil surrounds the crucible.

5. The control method of the feeding stabilization device of the small crucible for aerospace single crystal blades according to claim 4, characterized in that: The fixing rods are cylindrical and there are four groups in total. The four groups of fixing rods are respectively arranged on the front, back, left and right sides of the fixing bracket, and each group of fixing rods has 11 pieces.

6. The control method of the feeding stabilization device of the small crucible for aerospace single crystal blades according to claim 1, characterized in that: The rotating assembly comprises a connecting angle steel and a rotating arm; the connecting angle steel is connected to the lower end of the stabilizer by welding; and the rotating arm is connected to the connecting angle steel by welding.

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