CN213658623U

CN213658623U - Portable quenching medium cooling performance tester

Info

Publication number: CN213658623U
Application number: CN202022723429.7U
Authority: CN
Inventors: 陈明; 刘子利
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-07-09
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a portable quenching medium cooling performance tester, which comprises a shell, wherein an alumina tube is arranged in the shell, the upper end of the alumina tube extends out of the top of the shell, a heating wire is wound outside the alumina tube, and the heating wire is coated in heat-insulating fibers; the shell is externally connected with a cup containing seat, the cup containing seat is also connected with a plurality of supporting rods, a supporting plate is connected among the supporting rods, a through hole is formed in the supporting plate, and the probe penetrates through the through hole and extends into the cup containing seat; the probe comprises an alloy pipe, an alloy column is arranged at the head end of the alloy pipe, a mounting hole is formed in the axis of the alloy column, and a thermocouple wire is arranged in the mounting hole. The utility model discloses compact structure adopts the integral type design, and portable, and heating efficiency is fast, and the security is high, is of value to and carries out quenching medium cooling performance test.

Description

Portable quenching medium cooling performance tester

Technical Field

The utility model relates to a portable quenching medium cooling performance tester, which is used for testing the quenching medium cooling performance.

Background

The heat treatment is a technology for regulating and controlling material performance and improving the service life, reliability and safety of products, the modern manufacturing industry of airplanes, high-speed rails, ships, automobiles and various production and manufacturing equipment can not carry out heat treatment, important parts can be used after proper heat treatment, and the heat treatment principle and the heat treatment process become technologies which must be mastered by students in the relevant professions and technicians in the mechanical manufacturing category.

Thermal treatment is a process by which the texture of a material is altered by heating, holding and cooling to achieve desired properties. Different heat treatment processes endow the material with different structures and properties due to different cooling modes. The quenching process is a heat treatment process for immersing supercooled austenite into a quenching medium for rapid cooling to obtain a martensite structure, the quenching process is matched with tempering at different temperatures to meet the service performance requirements of mechanical parts and tools and dies, the structure transformation in the quenching process depends on the cooling performance of the quenching medium, and the quenching quality is directly determined by the performance of the quenching medium.

The cooling curve of the ideal quenching medium should be rapidly cooled at the nose tip of the C curve and slowly cooled as much as possible near the martensite transformation starting temperature Ms so as to achieve the purposes of obtaining a martensite structure and reducing internal stress. No ideal quench media has been found. Therefore, the rapid test of the cooling characteristics of various quenching media applied to actual production at different temperature stages becomes an indispensable teaching experiment for students to understand the heat treatment principle and the core knowledge point of the process, and is also a basis for selecting and adjusting the quenching media when engineering technicians formulate the heat treatment process.

However, most of the teachers in colleges and universities in the teaching process adopt a classroom theory teaching method for teaching the cooling performance of the quenching medium for a long time, and lack a quenching medium cooling performance testing instrument suitable for classroom demonstration and manual operation of students, so that the students are difficult to learn the cooling performance of the quenching medium through direct observation in the teaching process, and cannot deeply understand and master the heat treatment principle and the core knowledge point of the process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at following the nickel alloy probe test method for measuring the cooling performance of industrial quenching oil through GB/T30823 plus 2014, and providing a portable quenching medium cooling performance tester which has compact structure and high safety and is suitable for teaching.

In order to achieve the technical purpose, the technical scheme of the utility model is that:

the portable quenching medium cooling performance tester comprises a shell, wherein an alumina tube is arranged in the shell, the upper end of the alumina tube extends out of the top of the shell, a heating wire is wound outside the alumina tube in the shell, the heating wire is wrapped in heat-insulation fibers, and heat-insulation cotton is arranged between the heat-insulation fibers and the shell.

The shell is externally connected with a cup containing seat, the top of the cup containing seat is provided with a groove, the groove is used for placing a cup, and the cup contains a certain amount of quenching medium to be detected; the cup holding seat is further connected with a plurality of supporting rods, a supporting plate is connected between the supporting rods, and a through hole for allowing the head end of the probe to penetrate is formed in the supporting plate.

The probe comprises an alloy pipe, an alloy column is arranged at the head end of the alloy pipe, the alloy column and the alloy pipe are of an integrated structure, a mounting hole is formed in the axis of the alloy column along the axial direction of the alloy column, and a thermocouple wire is arranged in the mounting hole; the alloy pipe tail end is connected with a data acquisition device base, a data acquisition device is installed on the data acquisition device base, and the data acquisition device is used for acquiring real-time temperature data of the probe head end through a thermocouple wire and transmitting the real-time temperature data to a computer data processing system.

The alloy pipe is also provided with a limiting block, the head end of the probe penetrates through the through hole and extends into the containing cup, and the limiting block limits the depth of the probe extending into the containing cup.

The electric heating wire and the data acquisition device are both electrically connected with the controller, and the controller is installed on the shell.

And a proximity switch is arranged at the upper end of the alumina tube and used for detecting whether the probe is positioned in the alumina tube or not, and the proximity switch is electrically connected with the controller.

Be provided with the bracing piece via hole in the backup pad, the bolt is installed to the lateral wall in bracing piece via hole, the bolt link up bracing piece via hole lateral wall, and the bracing piece via hole is passed on the bracing piece top, and the bolt is used for with backup pad fixed connection on the bracing piece.

The utility model has the advantages of it is following:

1. the utility model has compact structure, integrated design, convenient moving and carrying, high heating efficiency and high safety, and is beneficial to the test of the cooling performance of the quenching medium;

2. the heating wire of the utility model is coated with the heat preservation fiber, so that the heat preservation fiber and the heating wire form a whole body, the temperature is ensured to be uniform, and the heating efficiency is improved;

3. the utility model discloses the probe size is less than the through-hole size, and the through-hole size is less than spacing piece size, makes the probe can pass the through-hole fast and insert and hold the cup in to fix in the backup pad, improve operating efficiency.

4. The utility model can avoid the quenching medium from spilling and improve the safety by fixing the containing cup in the groove.

5. The utility model discloses alloy pipe and alloy post formula structure as an organic whole can avoid the probe fracture, improve probe life and use number of times.

6. The utility model discloses a set up thermal-insulated cotton, isolated inside heat avoids the casing overheated, scalds operating personnel, improves the security.

7. The utility model discloses a proximity switch makes the controller can judge whether the probe is located the alumina tube, avoids the invalid heating of heating wire, improves the security.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

As shown in fig. 1, the portable quenching medium cooling performance tester comprises a shell 11 made of stainless steel, an alumina tube 12 is arranged in the shell 11, the upper end of the alumina tube 12 extends out of the top of the shell 11, a heating wire 13 is wound outside the alumina tube 12 in the shell 11, the heating wire 13 is wrapped in a heat-insulating fiber 14, and a heat-insulating cotton 15 is arranged between the heat-insulating fiber 14 and the shell 11.

The utility model discloses a cup holder 21, including casing 11 outer connection, it is provided with the recess to hold cup holder 21 top, the recess is used for placing and holds cup 22, it still is connected with two (also can set up to a plurality of) bracing pieces 23 to hold cup holder 21, and two bracing pieces 23 symmetry respectively set up in the both sides of holding cup holder 21, and backup pad 24 is connected between two bracing pieces 23.

Specifically, be provided with the bracing piece via hole on the backup pad 24, bolt 42 is installed to the lateral wall in bracing piece via hole, bolt 42 link up bracing piece via hole lateral wall, and the bracing piece via hole is passed on bracing piece 23 top, and bolt 42 is used for with backup pad 24 fixed connection on bracing piece 23.

The supporting plate 24 is provided with a probe head end through hole 25, the through hole 25 is arranged at the center of the supporting plate 24, and the probe head end through the through hole 25 extends into the containing cup 22.

The probe comprises an alloy pipe 31, an alloy column 32 is arranged at the head end of the alloy pipe 31, the alloy column 32 and the alloy pipe 31 are of an integrated structure, and the alloy column 32 and the alloy pipe 31 are integrally prepared from nickel-based solid solution strengthening alloy.

Along the axial direction of the alloy column 32, the axis of the alloy column 32 is provided with a mounting hole 33, a thermocouple wire is arranged in the mounting hole 33, and the thermocouple wire is mounted at the axis of the alloy column 32 and used for measuring the temperature of the alloy column 32 (the head end of the probe).

The tail end of the alloy pipe 31 is connected with a data acquisition device base 34, a data acquisition device is installed on the data acquisition device base 34, and the data acquisition device is used for acquiring real-time temperature data of the head end of the probe through a thermocouple wire and transmitting the real-time temperature data to a computer data processing system.

The alloy pipe 31 is further provided with a limiting block 41, the limiting block 41 is movably connected to the alloy pipe 31 through threads, the size of the limiting block 41 is larger than that of the through hole 25, the head end of the probe penetrates through the through hole 25 and extends into the containing cup 22, and the limiting block 41 limits the depth of the probe extending into the containing cup 22.

The upper end of the alumina tube 12 is provided with a proximity switch, the proximity switch is used for detecting whether the probe is positioned in the alumina tube 12 or not, the proximity switch is electrically connected with a controller, the controller is further connected with an electric heating wire 13 and a data acquisition device, and the controller is installed on the shell 11.

The cup 22 for containing a certain amount of quenching medium to be measured is placed in the groove of the cup holder 21, and the bottom of the cup 22 is clamped by the groove. When the measurement is started, the controller detects whether the probe is positioned in the alumina tube 12 or not through the proximity switch, if the probe head end is detected to be in the alumina tube 12, the controller drives the heating wire 13 to heat the probe head end, and in the heating process, the data acquisition device at the tail end of the probe acquires temperature data of the probe head end through the thermocouple wire. After the temperature of the head end of the probe reaches a preset value, the probe is rapidly taken out of the alumina tube 12 and is inserted into the quenching medium of the containing cup 22, the data acquisition device at the tail end of the probe acquires the temperature data of the head end of the probe in real time through a thermocouple wire and transmits the data to the computer data processing system, the computer data processing system processes the acquired real-time cooling temperature data to obtain a cooling process curve (temperature/time) and a cooling characteristic curve (temperature/cooling speed), and a quenching oil cooling performance experimental report is automatically generated.

After the head end of the probe penetrates through the through hole 25 and is inserted into the quenching medium, the limiting block 41 falls on the supporting plate 24, the position of the probe is fixed, and the depth of the probe extending into the accommodating cup 22 is limited.

After the temperature of the head end of the probe reaches a preset value and moves out of the alumina tube 12, the controller detects that the probe is not positioned in the alumina tube 12 through the proximity switch, and the controller stops the heating wire 13 to continue heating, so that the heating wire is prevented from being heated inefficiently.

The above-mentioned embodiment does not limit the utility model in any way, and all the technical solutions that adopt the mode of equivalent replacement or equivalent transform to obtain all fall within the protection scope of the utility model.

Claims

1. The portable quenching medium cooling performance tester is characterized by comprising a shell (11), wherein an alumina tube (12) is arranged in the shell (11), the upper end of the alumina tube (12) extends out of the top of the shell (11), an electric heating wire (13) is wound outside the alumina tube (12) in the shell (11), and the electric heating wire (13) is wrapped in heat-insulating fibers (14);

the shell (11) is externally connected with a cup containing seat (21), the top of the cup containing seat (21) is provided with a groove, the groove is used for placing a cup containing body (22), the cup containing seat (21) is also connected with a plurality of supporting rods (23), supporting plates (24) are connected among the supporting rods (23), and the supporting plates (24) are provided with through holes (25) for the probe head ends to pass through;

the probe comprises an alloy pipe (31), an alloy column (32) is arranged at the head end of the alloy pipe (31), the alloy column (32) and the alloy pipe (31) are of an integrated structure, a mounting hole (33) is formed in the axis of the alloy column (32) along the axial direction of the alloy column (32), and a thermocouple wire is arranged in the mounting hole (33); the tail end of the alloy pipe (31) is connected with a data acquisition device base (34), a data acquisition device is mounted on the data acquisition device base (34), and the data acquisition device is used for acquiring real-time temperature data of the head end of the probe through a thermocouple wire; the alloy pipe (31) is also provided with a limiting block (41), the head end of the probe penetrates through the through hole (25) and extends into the containing cup (22), and the limiting block (41) limits the depth of the probe extending into the containing cup (22);

the electric heating wire (13) and the data acquisition device are both electrically connected with a controller, and the controller is installed on the shell (11).

2. The portable quenching medium cooling performance tester as claimed in claim 1, wherein: and heat insulation cotton (15) is arranged between the heat insulation fiber (14) and the shell (11).

3. The portable quenching medium cooling performance tester as claimed in claim 1, wherein: and a proximity switch is arranged at the upper end of the alumina tube (12) and used for detecting whether the probe is positioned in the alumina tube (12), and the proximity switch is electrically connected with a controller.

4. The portable quenching medium cooling performance tester as claimed in claim 1, wherein: be provided with the bracing piece via hole on backup pad (24), bolt (42) are installed to the lateral wall in bracing piece via hole, bracing piece via hole lateral wall is link up in bolt (42), and the bracing piece via hole is passed on bracing piece (23) top, and bolt (42) are used for with backup pad (24) fixed connection on bracing piece (23).