Automatic slurry performance measuring device

Abstract

The utility model belongs to the field of investment casting ceramic slurry, and relates to an automatic slurry performance measuring device. Comprising an overturning mechanism, a rotating mechanism, a fixing device, a slurry performance detection sensor and a sensor cleaning box, the overturning mechanism comprises an upper connecting piece, a lower connecting piece and a first rotating air cylinder, one side of the upper connecting piece is connected with one end of the first rotating air cylinder, and one side of the lower connecting piece is connected with the other end of the first rotating air cylinder and used for achieving overturning movement; the rotating mechanism comprises an F-shaped side connecting piece and a second rotating air cylinder, a lower plate of the F-shaped side connecting piece is connected with one end of the second rotating air cylinder, and the other end of the second rotating air cylinder penetrates through an upper plate of the F-shaped side connecting piece to be connected with the lower connecting piece and is used for achieving rotating motion; the upper end of the fixing device is connected with the lower end of the F-shaped side connecting piece, and the lower end of the fixing device is used for fixing a slurry cylinder; the slurry performance detection sensor is fixed at the end part of the upper connecting piece; the sensor cleaning box is used for containing a cleaning solution.

Description

Technical Field

[0001] This utility model belongs to the field of ceramic slurry technology for investment casting, and relates to an automatic slurry performance measuring device, which aims to assist in the online automatic measurement of the viscosity and density of ceramic slurry. Background Technology

[0002] In the field of investment casting, the quality of the ceramic shell slurry directly affects the surface quality of the casting. A high powder-to-liquid ratio, low viscosity silica sol slurry can accurately replicate the surface shape of the wax pattern and effectively eliminate air bubbles, which helps reduce shell shrinkage during firing, increases surface density, and improves the surface quality of the shell. Therefore, in automated shell-making production lines, key indicators such as slurry viscosity and density must be tested regularly to ensure that the slurry performance is within the process specifications. When the slurry performance does not meet the standards, shell-making must be stopped and the slurry adjusted promptly to meet the process requirements.

[0003] Currently, most investment casting companies use manual methods such as paint cups to test the properties of the slurry. The accuracy of the measurement data is highly susceptible to human factors, making it difficult to trace the quality data of the mold shell. Utility Model Content

[0004] Purpose of this utility model: To provide an automatic slurry performance measuring device that replaces manual measurement with automatic slurry performance measurement, reduces errors caused by human factors, and improves shell-making stability.

[0005] Technical solution:

[0006] An automatic slurry performance measuring device includes: a flipping mechanism 1, a rotating mechanism 2, a fixing device 3, a slurry performance detection sensor 4, and a sensor cleaning tank 5. The flipping mechanism 1 includes an upper connecting member, a lower connecting member, and a first rotating cylinder. One side of the upper connecting member is connected to one end of the first rotating cylinder, and one side of the lower connecting member is connected to the other end of the first rotating cylinder, for achieving a flipping motion. The rotating mechanism 2 includes an F-shaped side connecting member and a second rotating cylinder. The lower plate of the F-shaped side connecting member is connected to one end of the second rotating cylinder, and the other end of the second rotating cylinder passes through the upper plate of the F-shaped side connecting member and connects to the lower connecting member, for achieving a rotating motion. The upper end of the fixing device 3 is connected to the lower end of the F-shaped side connecting member, and the lower end of the fixing device 3 is used to fix the slurry cylinder. The slurry performance detection sensor 4 is fixed to the end of the upper connecting member. The sensor cleaning tank 5 is used to contain a cleaning solution to clean the slurry performance detection sensor 4.

[0007] Furthermore, the end of the upper connector is stepped.

[0008] Furthermore, the slurry performance testing sensor 4 uses Rheonics' SRV type vibratory viscometer.

[0009] Furthermore, after the micro-torsional resonator in the slurry performance detection sensor 4 is immersed in the test fluid, the density and viscosity are calculated from the damping and resonant frequency through internal calculations.

[0010] Furthermore, the rotation axes of the first rotary cylinder and the second rotary cylinder are perpendicular.

[0011] Furthermore, the fixing device 3 is an L-shaped channel steel.

[0012] Beneficial effects:

[0013] 1) It achieves automatic measurement and recording of key indicators such as slurry viscosity, density, and temperature, and automatically alarms when the measured value deviates from the set threshold. This reduces the influence of human factors, improves measurement accuracy, and enables timely, accurate, and reliable acquisition of key parameters.

[0014] 2) Unlike traditional offline slurry extraction for testing, this method effectively avoids slurry loss and contamination;

[0015] 3) The robotic arm can perform slurry performance testing during the coating process, eliminating the need for sensors to be permanently fixed inside the tank, thus extending their service life. It also enables automatic cleaning of the sensors in the testing device, reducing manual cleaning operations. Attached Figure Description

[0016] Figure 1 Viscosity of a certain slurry changing over time;

[0017] Figure 2 Structural diagram of an automatic slurry performance measuring device;

[0018] Figure 3 Measurement process of automatic slurry performance measuring device;

[0019] Among them, 1-flipping mechanism, 2-rotating mechanism, 3-fixing device, 4-slurry performance detection sensor, and 5-sensor cleaning box. Detailed Implementation

[0020] In the field of investment casting, the quality of the ceramic mold shell slurry directly affects the surface quality of the casting. Therefore, in automated shell-making production lines, it is necessary to regularly test key indicators such as slurry viscosity and density to ensure that the slurry performance is within the process specifications. Currently, most investment casting companies use manual methods such as paint cups to test slurry performance. The accuracy of the measurement data recording is highly susceptible to human factors, making it difficult to trace the quality data of the mold shell.

[0021] like Figure 1The figure shows the viscosity of a slurry over time. Key indicators such as slurry viscosity change continuously as the solvent evaporates, directly affecting the coating thickness and product yield. Therefore, real-time monitoring of slurry performance is crucial.

[0022] To address this, an automatic slurry performance measuring device is proposed. This device can be fixed on the guard rim of equipment such as slurry tanks or pre-mixed slurry tanks to achieve automated measurement of key indicators such as slurry viscosity and density.

[0023] like Figure 2 As shown, an automatic slurry performance measuring device includes: a flipping mechanism 1, a rotating mechanism 2, a fixing device 3, a slurry performance detection sensor 4, and a sensor cleaning tank 5. The flipping mechanism 1 includes an upper connecting member, a lower connecting member, and a first rotating cylinder. One side of the upper connecting member is connected to one end of the first rotating cylinder, and one side of the lower connecting member is connected to the other end of the first rotating cylinder, for achieving a flipping motion. The rotating mechanism 2 includes an F-shaped side connecting member and a second rotating cylinder. The lower plate of the F-shaped side connecting member is connected to one end of the second rotating cylinder, and the other end of the second rotating cylinder passes through the upper plate of the F-shaped side connecting member and connects to the lower connecting member, for achieving a rotating motion. The upper end of the fixing device 3 is connected to the lower end of the F-shaped side connecting member, and the lower end of the fixing device 3 is used to fix the slurry cylinder. The slurry performance detection sensor 4 is fixed to the end of the upper connecting member. The sensor cleaning tank 5 is used to contain a cleaning solution to clean the slurry performance detection sensor 4.

[0024] In one possible embodiment, the end of the upper connector is stepped.

[0025] In one possible embodiment, the slurry performance testing sensor 4 is a Rheonics SRV type vibratory viscometer.

[0026] In one possible embodiment, after the micro-torsional resonator in the slurry performance detection sensor 4 is immersed in the test fluid, the density and viscosity are calculated from the damping and resonant frequency through internal calculations.

[0027] In one possible embodiment, the rotation axes of the first rotary cylinder and the second rotary cylinder are perpendicular.

[0028] In one possible embodiment, the fixing device 3 is an L-shaped channel steel.

[0029] In use, the fixing device 3 is fixed to the guard edge of equipment such as the slurry dipping tank and pre-mixed slurry tank to ensure that the sensor is stationary when measuring viscosity and density. The rotating mechanism 2 works in conjunction with the flipping mechanism 1 to change the position of the sensor tank from the cleaning tank to the slurry dipping tank, realizing the detection of key slurry performance. The slurry performance detection sensor 4 adopts Rheonics' SRV type vibratory viscometer. After immersing its micro-torsional resonator in the test fluid, the density and viscosity are calculated internally from the damping and resonant frequency, featuring real-time measurement and continuous response. The sensor cleaning tank 5 is filled with clean water. After the sensor completes the slurry performance test, the sensor oscillator is kept in clean water for easy manual cleaning.

[0030] The specific testing scheme for the automatic slurry performance measuring device is as follows:

[0031] 1) System settings for automatic detection time: The operator sets the automatic detection program and specific detection time for slurry performance based on the process and production conditions, such as during each layer of slurry application.

[0032] 2) Execute the automatic detection program:

[0033] ① The liquid level in the slurry tank is automatically measured by the liquid level detection function of the slurry tank to ensure that the sensor oscillator can be immersed in the slurry. If the slurry is insufficient, an alarm should be set to remind the operator to prepare the slurry.

[0034] ② If there is enough slurry, the slurry dipping tank stops rotating. The sensor oscillator is immersed in the slurry through the cooperation of the rotating mechanism 2 and the flipping mechanism 1. The current slurry viscosity, density and temperature are detected in real time. Under the control program instructions, the key slurry performance data such as viscosity and density are read and automatically entered into the control system.

[0035] 3) Result comparison and anomaly feedback: After internal conversion and liquid temperature compensation by the sensor, the measured result is compared with the set value. If it exceeds the set threshold range, the control system will issue an anomaly alarm. At this time, the slurry composition needs to be adjusted in time to avoid affecting the coating quality.

[0036] 4) Sensor cleaning test: The sensor oscillator is immersed in clean water through the cooperation of the rotating mechanism 2 and the flipping mechanism 1 to clean the oscillator and prevent the slurry on it from forming clumps that affect the accuracy of the sensor itself. The clean water in the cleaning tank 5 needs to be visually inspected by the operator. If it is cloudy, it needs to be replaced manually.

[0037] More specifically, the specific testing scheme for the automatic slurry performance measuring device is as follows:

[0038] 1) The operator sets the automatic detection cycle in the host computer system according to the process and production situation. In order to ensure the accuracy of the performance test value, the slurry performance test is linked with the execution of the workpiece slurry application program. During the workpiece slurry application process, the slurry application tank stops rotating, and the measuring device runs at the same time to realize the automatic measurement of slurry performance.

[0039] 2) Perform automatic slurry performance testing process:

[0040] ① When the slurry dipping tank stops rotating, the slurry level detection function on the tank measures the slurry level, ensuring that the sensor 4 micro-torsional resonator is fully immersed in the slurry. If the slurry level is insufficient, the host computer will alarm to prompt the operator to add slurry. See details. Figure 3 Process 1;

[0041] ② After ensuring sufficient slurry, as the workpiece is coated with slurry, the flipping mechanism 1 rotates 90°, allowing the sensor 4 to detach from the cleaning tank 5. This controls the water flow to the micro-torsional resonator, preventing water residue from contaminating the slurry. See details. Figure 3 Process 2;

[0042] ③ Rotating mechanism 2 rotates 90°, and then flipping mechanism 1 runs -90°, immersing sensor (4) into the slurry. At this time, the slurry tank is in a stopped state, and sensor 4 automatically measures viscosity, density and liquid temperature. The measurement time is about 30 seconds. Under the control program command, key slurry performance data such as viscosity and density are read and automatically entered into the control system. See details. Figure 3 Processes 3-5;

[0043] ④ Compare the slurry performance data with the set threshold. If it exceeds the set threshold range, the control system will issue an abnormal alarm. At this time, the slurry composition needs to be adjusted in time to avoid affecting the coating quality.

[0044] ⑤ After completing the slurry performance test, the flipping mechanism 1 rotates 90° to detach the sensor 4 from the slurry, allowing for slurry control of the micro-torsional resonator. After 10 seconds of slurry control, the rotating mechanism 2 rotates -90°, followed by the flipping mechanism 1 rotating -90°, allowing the sensor 4 to enter the cleaning tank 5. The cleaning tank 5 contains clean water, which cleans the micro-torsional resonator of the sensor 4, ensuring it is clean and preventing slurry agglomeration that could affect the accuracy of the sensor 4. See details. Figure 3 Processes 6-8.

[0045] ⑥ The water in cleaning tank 5 needs to be visually inspected by the operator. If it is cloudy, it needs to be replaced manually.

[0046] This invention solves the following technical problems: automatic measurement of slurry properties replaces manual measurement, reducing errors caused by human factors and improving shell-making stability; unlike traditional offline measurement of slurry properties, it reduces the possibility of slurry waste and contamination caused by slurry sampling; key indicators such as slurry viscosity and density are automatically measured and recorded, and an automatic alarm is triggered when the measured value deviates from the set threshold; it does not require occupying the space of the slurry tank rim, reducing the dependence of the automatic slurry performance measurement device on space; and slurry performance testing is performed during the robotic coating process, eliminating the need for sensors to be constantly fixed inside the tank, thus improving service life.

Claims

1. A slurry performance automatic measuring device, characterized by, The utility model relates to a kind of slurry performance detection device, including: Turnover mechanism (1), rotating mechanism (2), fixing device (3), slurry performance detection sensor (4), sensor cleaning tank (5), wherein, Turnover mechanism (1) includes upper connecting piece, lower connecting piece, first rotary cylinder, wherein, one side of upper connecting piece is connected with one end of first rotary cylinder, one side of lower connecting piece is connected with the other end of first rotary cylinder, for realizing turnover motion; Rotating mechanism (2) includes F type side connecting piece, second rotary cylinder, the lower plate of F type side connecting piece is connected with one end of second rotary cylinder, the other end of second rotary cylinder is connected with lower connecting piece through the upper plate of F type side connecting piece, for realizing rotating motion; Fixing device (3) upper end is connected with the lower end of F type side connecting piece, and the lower end of fixing device (3) is used for fixing slurry cylinder; Slurry performance detection sensor (4) is fixed in the end of upper connecting piece; Sensor cleaning tank (5) is used to accommodate cleaning solution to realize the cleaning of slurry performance detection sensor (4).

2. The automatic slurry performance measuring device according to claim 1, wherein Upper connecting piece end is stepped shape.

3. The automatic slurry performance measuring device according to claim 1, wherein Slurry performance detection sensor (4) uses Rheonics's SRV type vibration viscometer.

4. The automatic slurry performance measuring device according to claim 1, wherein After micro-torsional resonator in slurry performance detection sensor (4) is immersed in test fluid, density and viscosity are calculated from damping and resonance frequency by internal calculation.

5. The automatic slurry performance measuring device according to claim 1, wherein The rotation axis of first rotary cylinder and second rotary cylinder is vertical.

6. The automatic slurry performance measuring device according to claim 1, wherein Fixing device (3) is L-shaped channel steel.

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