Method for controlling straightness of functional thermosensitive porcelain tube

Abstract

The invention belongs to the technical field of aviation fire prevention systems, and discloses a method for controlling the straightness of a functional thermosensitive porcelain tube, which sequentially ensures the straightness of the thermosensitive porcelain tube in a raw material forming stage, a drying and cutting treatment stage and a high-temperature calcining and shaping stage by optimizing key links in a production process. The technical problem that the straightness of an existing thermosensitive ceramic tube is often difficult to accurately control is solved. And the straightness of the thermosensitive porcelain tube is effectively ensured to reach the precision requirement of 0.1 mm, so that the assembly efficiency and reliability of products are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation fire protection systems, and in particular relates to a method for controlling straightness in a manufacturing process of a functional thermal-sensitive porcelain tube. Background Art

[0002] In the existing technology, functional thermistor porcelain tubes play an important role in aviation cable systems due to their unique thermal properties. As a key filler inside aviation cables, functional thermistor porcelain tubes need to realize alarm functions through resistance changes after being heated. In view of its special application, the straightness of the thermistor porcelain tubes needs to be strictly controlled to ensure smooth penetration between the nickel tube and the core wire.

[0003] However, during the production process, the straightness of the thermistor porcelain tube is often difficult to accurately control, which makes subsequent assembly difficult and even affects the overall performance and safety of the product. Therefore, it is particularly important to develop an efficient and reliable method to control the straightness of thermistor porcelain tube. Summary of the invention

[0004] The present invention provides a method for controlling the straightness of a functional thermistor porcelain tube, which ensures that the straightness of the thermistor porcelain tube reaches the precision requirement of 0.1 mm by optimizing the key links in the production process, thereby improving the assembly efficiency and reliability of the product.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for controlling the straightness of a functional thermistor porcelain tube, characterized by comprising the following steps:

[0007] Step 1: Prepare heat-sensitive clay and necessary production equipment, including clay refining machine, tube extruder, corrugated paper, cardboard and high-temperature ceramic tooling;

[0008] Step 2: Use a mud refiner to extrude the thermal clay into a preliminary thermal porcelain tube through a tube extruder, and quickly put it into the groove of the corrugated paper and arrange it neatly, and press the two ends with cardboard;

[0009] Step 3: Place the corrugated paper with the thermosensitive porcelain tube in a ventilated and dry place to dry naturally until the thermosensitive porcelain tube is completely hardened;

[0010] Step 4: According to product requirements, use a cutting tool to cut the dried thermistor into specified lengths;

[0011] Step 5: Place the cut thermistor tubes one by one into the placement slot of the high-temperature ceramic tooling, and send them into the calcining furnace for high-temperature calcination to shape and solidify the thermistor tubes;

[0012] Step 6: Use a straightness gauge to test the straightness of the thermistor tube after calcination, screen out thermistor tubes that do not meet the requirements, and retain qualified thermistor tubes for subsequent assembly.

[0013] As a further technical solution of the present invention, in step 2, the parameters of the mud refiner and the tube extruder are first adjusted to ensure uniform extrusion of the thermosensitive mud; during the extrusion process, the straightness of the thermosensitive porcelain tube is monitored mechanically or manually, and the equipment or operating method is adjusted in time to avoid bending or twisting of the thermosensitive porcelain tube during the forming stage.

[0014] As a further technical solution of the present invention, in step 3, the drying temperature and humidity are controlled, temperature: room temperature, humidity: 60% RH ~ 80% RH; regularly check the drying condition of the thermistor porcelain tube to ensure that it remains in a straight state during the drying process.

[0015] As a further technical solution of the present invention, in step 4, a precise cutting tool is used, and during the cutting process, attention is paid to maintaining the straightness of the thermistor tube to avoid bending of the thermistor tube due to stress generated during cutting.

[0016] As a further technical solution of the present invention, the corrugated paper groove adopts a semicircular structure design, and the length of the groove is greater than the length of the thermistor porcelain tube.

[0017] As a further technical solution of the present invention, in step 5, a plurality of placement grooves are arranged in an array on the high-temperature ceramic tooling, and the placement grooves are designed with a rectangular structure, the width of which is 0.1 mm larger than the outer diameter of the thermistor tube, and the depth is greater than the outer diameter of the thermistor tube.

[0018] As a further technical solution of the present invention, in step 6, the straightness gauge adopts a block structure design, which is provided with a through hole and a countersunk hole on one side of the through hole, and the aperture of the through hole is 0.1 mm larger than the outer diameter of the thermistor porcelain tube.

[0019] As a further technical solution of the present invention, in step 6, the calcined thermistor tubes are placed one by one in a straightness gauge for inspection to see whether the thermistor tubes can pass through the gauge smoothly. Thermistor tubes that cannot pass through the straightness gauge are considered to have unqualified straightness and need to be marked and screened out.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By optimizing the key links in the production process, the straightness of the thermistor tube is ensured in the raw material forming stage, drying and cutting treatment stage, and high-temperature calcination and shaping stage. It effectively ensures that the straightness of the thermistor tube reaches the accuracy requirement of 0.1mm, thereby improving the assembly efficiency and reliability of the product.

[0022] 2. By customizing high-temperature ceramic tooling, the thermistor porcelain tube has enough space to expand without deformation during the calcination process.

[0023] 3. By designing a special straightness gauge, the calcined thermistor porcelain tubes are placed in the straightness gauge one by one for testing to ensure that the straightness of the thermistor porcelain tubes is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the arrangement of the thermal-sensitive ceramic tubes in the corrugated paper;

[0025] Figure 2 It is a structural schematic diagram of high temperature ceramic tooling;

[0026] Figure 3 Schematic diagram of a straightness gauge. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-3 An embodiment of the present invention provides a method for controlling the straightness of a functional thermistor porcelain tube, which ensures that the straightness of the thermistor porcelain tube reaches the accuracy requirement of 0.1 mm by optimizing the key links in the production process, thereby improving the assembly efficiency and reliability of the product.

[0029] In the raw material forming stage: ensure that the thermistor porcelain tube has a good straightness foundation in the forming stage. Use high-quality thermal clay as raw material, adjust the parameters of the clay refining machine and the tube extruder, ensure that the clay is evenly extruded to form a preliminary thermal porcelain tube. During the extrusion process, monitor the straightness of the thermal porcelain tube by mechanical or manual means, and adjust the equipment or operation method in time to avoid bending or twisting of the thermal porcelain tube in the forming stage. Put the extruded thermal porcelain tube quickly and smoothly into the groove of the corrugated paper to keep it in a straight state. The groove of the corrugated paper adopts a semicircular structure design, and the straightness of the groove is strictly guaranteed to keep the thermal porcelain tube straight.

[0030] During the drying and cutting process: Keep the straightness of the porcelain tube during the drying process, and obtain the thermistor porcelain tube that meets the length requirements through cutting. Place the corrugated paper with the thermistor porcelain tube in a ventilated and dry place, and control the drying temperature and humidity (temperature: room temperature; humidity: 60% RH ~ 80% RH) to avoid deformation of the thermistor porcelain tube due to uneven drying. Check the drying condition of the thermistor porcelain tube regularly to ensure that it remains straight during the drying process. Use precise cutting tools to cut the dried thermistor porcelain tube into the specified length (such as 40mm-80mm) according to product requirements. During the cutting process, pay attention to maintaining the straightness of the porcelain tube to avoid bending of the thermistor porcelain tube due to stress generated during cutting.

[0031] In the high-temperature calcination and shaping stage: the thermistor tube is solidified and shaped through high-temperature calcination, while further maintaining its straightness. Design and customize high-temperature ceramic tooling, on which a number of placement slots are arranged in an array. The placement slots are designed with a rectangular structure, and their width is 0.1mm larger than the outer diameter of the thermistor tube, and their depth is greater than the outer diameter of the thermistor tube, to ensure that the thermistor tube has enough space to expand without deformation during the calcination process.

[0032] Place the cut thermistor tubes one by one into the placement slot of the high-temperature ceramic tooling to ensure that the thermistor tubes fit tightly with the tooling. Send the tooling with the thermistor tubes into the calcining furnace and perform high-temperature calcination according to the predetermined calcination curve to solidify the thermistor tubes. During the calcination process, strictly control the temperature and environment in the furnace to prevent the thermistor tubes from deforming due to uneven heating or oxidation reaction.

[0033] In the straightness detection stage: the thermistor porcelain tubes after calcination are tested for straightness to ensure that all thermistor porcelain tubes meet the product requirements. Use a straightness gauge for testing. The aperture of the gauge should be 0.1mm larger than the outer diameter of the thermistor porcelain tube to ensure the accuracy of the test. Put the calcined thermistor porcelain tubes into the straightness gauge one by one for testing to observe whether the thermistor porcelain tubes can pass through the straightness gauge smoothly. Thermistor porcelain tubes that cannot pass the straightness gauge are considered to be unqualified in straightness and need to be marked and screened out to avoid affecting subsequent assembly. Record the test data, analyze the causes of unqualified products, and take corresponding improvement measures to improve product quality. The straightness gauge adopts a block structure design, which is provided with a through hole and a countersunk hole on one side of the through hole. The aperture of the through hole is 0.1mm larger than the outer diameter of the thermistor porcelain tube to facilitate the passage of the thermistor porcelain tube.

[0034] So far, the purpose of the present invention has been achieved.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for controlling the straightness of a functional thermistor porcelain tube, characterized in that , including the following steps: Step 1: Prepare heat-sensitive clay and necessary production equipment, including clay refining machine, tube extruder, corrugated paper, cardboard and high-temperature ceramic tooling; Step 2: Use a mud refiner to extrude the thermal clay into a preliminary thermal porcelain tube through a tube extruder, and quickly put it into the groove of the corrugated paper and arrange it neatly, and press the two ends with cardboard; Step 3: Place the corrugated paper with the thermosensitive porcelain tube in a ventilated and dry place to dry naturally until the thermosensitive porcelain tube is completely hardened; Step 4: According to product requirements, use a cutting tool to cut the dried thermistor into specified lengths; Step 5: Place the cut thermistor tubes one by one into the placement slot of the high-temperature ceramic tooling, and send them into the calcining furnace for high-temperature calcination to shape and solidify the thermistor tubes; Step 6: Use a straightness gauge to test the straightness of the thermistor tube after calcination, screen out thermistor tubes that do not meet the requirements, and retain qualified thermistor tubes for subsequent assembly.

2. A method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: In step 2, the parameters of the mud refiner and the tube extruder are first adjusted to ensure uniform extrusion of the thermosensitive mud; during the extrusion process, the straightness of the thermosensitive porcelain tube is monitored mechanically or manually, and the equipment or operating method is adjusted in time to avoid bending or twisting of the thermosensitive porcelain tube during the forming stage.

3. A method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: In step 3, the drying temperature and humidity are controlled, the temperature is room temperature, and the humidity is 60% RH to 80% RH; the drying condition of the thermistor is checked regularly to ensure that the thermistor remains in a straight line during the drying process.

4. The method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: In step 4, use a precise cutting tool and pay attention to maintaining the straightness of the thermistor tube during the cutting process to avoid bending of the thermistor tube due to stress generated during cutting.

5. The method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: The corrugated paper groove adopts a semicircular structure design, and the length of the groove is greater than the length of the thermal porcelain tube.

6. A method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: In step 5, a plurality of placement grooves are arranged in an array on the high temperature ceramic tooling. The placement grooves are designed with a rectangular structure, and their width is 0.1 mm larger than the outer diameter of the thermistor ceramic tube, and their depth is greater than the outer diameter of the thermistor ceramic tube.

7. The method for controlling the straightness of a functional thermistor porcelain tube according to claim 1, characterized in that: In step 6, the straightness gauge is designed in a block structure, which is provided with a through hole and a countersunk hole on one side of the through hole. The diameter of the through hole is 0.1 mm larger than the outer diameter of the thermistor porcelain tube.

8. A method for controlling the straightness of a functional thermistor porcelain tube according to claim 7, characterized in that: In step 6, the calcined thermistor tubes are placed in a straightness gauge one by one for testing to see whether the thermistor tubes can pass through the gauge smoothly. Thermistor tubes that cannot pass through the straightness gauge are considered to have unqualified straightness and need to be marked and screened out.

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