Temperature monitoring equipment for ion nitriding treatment

Abstract

The invention relates to the technical field of industrial processing, in particular to temperature monitoring equipment for ion nitriding treatment. Comprising an outer frame, a first vertical column, a second vertical column, a third vertical column, a cross beam and a fan-shaped ruler, the outer frame comprises four rigid rectangular materials which are connected end to end, and one end point of each vertical column is perpendicularly and fixedly connected with the inner surface of the top of the outer frame; the second vertical column and the transverse column comprise a first transverse column, a second transverse column and a rotary connecting rod, the first transverse column is parallel to the second transverse column, the two ends of the rotary connecting rod are fixedly connected with the first transverse column and the second transverse column respectively, one end of the vertical column is vertically and fixedly connected with the inner surface of the top of the outer frame, and the other end of the vertical column is fixedly connected with the inner surface of the top of the outer frame. One end of the second vertical column is perpendicularly and fixedly connected with the inner surface of the bottom of the outer frame, the other end of the second vertical column is hinged to one side wall of the transverse column, the end, away from the rotary connecting rod, of the second transverse column is rotationally connected with the central angle of the fan-shaped ruler, and one end of the third vertical column is perpendicularly and fixedly connected with the inner surface of the bottom of the outer frame.

Description

Technical Field

[0001] This invention relates to the field of industrial processing technology, and more specifically to a temperature monitoring device for ion nitriding treatment. Background Technology

[0002] Ion nitriding is a chemical heat treatment process that uses a furnace as the anode and the workpiece as the cathode in a low-vacuum nitrogen-containing atmosphere. A DC voltage of several hundred volts is applied between the anode and cathode to generate glow discharge for nitriding.

[0003] In order to improve equipment utilization, processing efficiency and reduce production costs, the maximum furnace loading is often used during ion nitriding. This results in workpieces of different sizes and shapes being mixed in the same ion nitriding furnace. Different workpieces generally have different S / M values, which leads to temperature differences in various parts of the furnace. Especially during the heating stage, the temperature difference in various parts of the furnace is the greatest. Therefore, poor temperature uniformity and precise temperature control in ion nitriding furnaces have become two global problems that have not been well solved to this day. This is also the fundamental reason why the quality stability of ion nitriding is lower than that of other nitriding methods.

[0004] Currently, the main method for monitoring ion nitriding temperature is for operators to observe the color of the workpiece inside the furnace through an observation hole on the furnace wall after the glow discharge is turned off (different colors appear depending on the workpiece temperature), while simultaneously referring to the temperature displayed on the thermocouple to determine the nitriding temperature of the workpiece inside the furnace. However, due to varying operator skill levels and numerous external influencing factors (such as lighting, with significant differences between observation at night and during well-lit days), this method has a relatively large margin of error. Therefore, it is extremely important to develop a temperature measuring device that can be placed inside the ion nitriding furnace along with the workpiece and can accurately measure the temperature at key points inside the furnace to replace human visual monitoring.

[0005] To address the aforementioned issues, the applicant proposes a temperature monitoring device for ion nitriding treatment. Summary of the Invention

[0006] The purpose of this invention is to provide a temperature monitoring device for ion nitriding treatment to solve the problems in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a temperature monitoring device for ion nitriding treatment, characterized in that it includes an outer frame, vertical column one, vertical column two, vertical column three, a magnifying vertical column, a horizontal beam, and a sector ruler. The outer frame comprises four rigid rectangular materials connected end to end. The end of vertical column one is vertically and fixedly connected to the inner surface of the top of the outer frame. The end of vertical column two is vertically and fixedly connected to the inner surface of the top of the outer frame. The horizontal column includes horizontal column one, horizontal column two, and a rotating connecting rod. Horizontal column one and horizontal column two are parallel. The two ends of the rotating connecting rod are rotatably connected to horizontal column one and horizontal column two, respectively. One end of vertical column two is vertically and fixedly connected to the inner surface of the top of the outer frame, and the other end is hinged to one end of horizontal column two. One end of vertical column two is vertically and fixedly connected to the inner surface of the bottom of the outer frame, and the other end is hinged to one side wall of horizontal column two. The end of horizontal column two away from the rotating connecting rod is rotatably connected to the center angle of the sector ruler. One end of vertical column three is vertically and fixedly connected to the inner surface of the bottom of the outer frame, and the other end is hinged to the bottom of the sector ruler. The magnifying vertical column is rotatably connected to horizontal column two.

[0008] Optionally, the materials of the first vertical column, the second vertical column, the third vertical column, and the enlarged vertical column are austenitic stainless steel.

[0009] Optionally, a counterweight is also provided at the end of the horizontal column that is away from the vertical column.

[0010] Optionally, the sector ruler may also have a through hole with the same shape as the sector ruler.

[0011] Optionally, the arc edge of the sector ruler is also provided with graduations.

[0012] Beneficial effects: 1. The furnace body observation hole enables clear reading of the furnace temperature, solving the problem of relying solely on human visual observation to judge the temperature in existing technologies.

[0013] 2. By setting up the combination of vertical columns and horizontal beams, the degree of thermal expansion and contraction of the material is amplified, solving the problem that the material's expansion coefficient is small and cannot be observed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0015] Figure 2 This is a front view schematic diagram of the structure of an embodiment of the present invention.

[0016] In the diagram: 1. Outer frame; 2. Vertical column one; 3. Vertical column two; 4. Vertical column three; 5. Horizontal beam; 51. Horizontal column one; 52. Horizontal column two; 53. Rotating connecting rod; 54. Counterweight; 6. Sector ruler; 61. Through hole; 7. Enlarged vertical column. Detailed Implementation

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0018] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0019] Example 1

[0020] A temperature monitoring device for ion nitriding treatment, characterized in that it includes an outer frame 1, vertical column 1 2, vertical column 2 3, vertical column 3 4, magnifying vertical column 7, horizontal beam 5, and sector ruler 6. The outer frame 1 comprises four rigid rectangular materials connected end to end. The endpoints of vertical column 1 2 are vertically and fixedly connected to the inner top surface of the outer frame 1. Vertical column 2 3 and the horizontal beam include horizontal column 1 51, horizontal column 2 52, and a rotating connecting rod 53. Horizontal column 1 51 and horizontal column 2 52 are parallel. The rotating connecting rod 53... The two ends are rotatably connected to the first horizontal column 51 and the second horizontal column 52 respectively. The first vertical column 2 is vertically fixed to the inner surface of the top of the outer frame 1, and the other end is hinged to the end of the first horizontal column 51. The second vertical column 3 is vertically fixed to the inner surface of the bottom of the outer frame 1, and the other end is hinged to the side wall of the first horizontal column 51. The end of the second horizontal column 52 away from the rotating connecting rod 53 is rotatably connected to the center angle of the sector ruler 6. The third vertical column 4 is vertically fixed to the inner surface of the bottom of the outer frame 1, and the other end is hinged to the bottom of the sector ruler 6. The enlarged vertical column 7 is rotatably connected to the second horizontal column 52.

[0021] In this invention, ion nitriding is performed in a vacuum container, with the worktable as the cathode and the bell jar as the anode. A voltage of 600-900V is applied between the cathode and the anode. Under the influence of a strong electric field, the dilute nitrogen-containing nitriding agent in the furnace generates a large amount of nitrogen and other ions. The nitrogen ions bombard the workpiece surface under the influence of the electric field and form nitrides that are deposited on the workpiece surface, thereby achieving the purpose of surface nitriding. The surface area S of the workpiece determines the amount of ion bombardment and nitride deposition received by the workpiece, i.e., its energy absorption capacity. The mass M of the workpiece determines its heat storage capacity. Therefore, the ratio of S to M is the most critical factor determining the temperature of the workpiece during the nitriding process.

[0022] In this embodiment, the nitriding temperature of all the vertical columns is increased from 530℃ to 540℃, at which point the linear expansion coefficient of the austenitic stainless steel is approximately 1.8 × 10⁻⁶. -5 / ℃, at this time, the arc length L1 rotated by the right end of the horizontal column 52 is approximately:

[0023] L1 = 1.8 × 10 -5 ×10℃×100mm×2×100=3.6mm

[0024] In the ion nitriding process, precisely controlling the temperature within 10 degrees Celsius can greatly improve the nitriding quality.

[0025] In this invention, the vertical column 1 2, vertical column 2 3 and vertical column 3 4 are made of austenitic stainless steel.

[0026] In this embodiment, the austenitic stainless steel, containing approximately 18% Cr, 8%–10% Ni, and approximately 0.1% C, exhibits a stable austenitic structure. Austenitic chromium-nickel stainless steel includes the well-known 18Cr-8Ni steel and high-Cr-Ni series steels developed by increasing the Cr and Ni content and adding elements such as Mo, Cu, Si, Nb, and Ti. Austenitic stainless steel is non-magnetic and possesses high toughness and plasticity, but its strength is relatively low. It cannot be strengthened through phase transformation and can only be strengthened through cold working.

[0027] In this invention, a counterweight block 54 is also provided at the end of the horizontal column 51 away from the vertical column 2.

[0028] In this embodiment, the counterweight 54 set at the end of the horizontal bar away from the vertical bar 2 is used to balance the weight of the horizontal bar at the other end, so as to prevent the rotation of the other end from becoming smaller due to the weight, thus affecting the measurement accuracy.

[0029] In this invention, the sector ruler 6 also has a through hole 61 with the same shape as the sector ruler 6, and the arc edge of the sector ruler 6 is also provided with a scale.

[0030] In this embodiment, the sector ruler 6 is provided with a through hole 61. Firstly, the sector ruler 6 cannot be made of a transparent material. Although high-heat-resistant borosilicate glass is available, with a heat resistance temperature reaching approximately 1000 degrees Celsius, it is relatively expensive and more fragile than metal, making it unsuitable as a material for the sector ruler 6. Therefore, it is preferable that the through hole 61 be used as a tool for observing the scale of the sector ruler 6 in actual use.

[0031] Working principle: During use, the device is placed inside the furnace. As the furnace temperature increases, the three vertical columns expand and contract with temperature changes. Column 1 (2) extends downwards, and column 2 (3) extends upwards. The deformation of the vertical columns is amplified by the crossbeam 5. The rotation of the crossbeam 51 simultaneously drives the rotating connecting rod 53. Rotating the connecting rod 53 makes the connection points of the crossbeam 51 and the crossbeam 52 at the same height. This amplified vertical column 7 further enlarges the arc of the right end of the crossbeam 52 (pointing to the scale end). The bottom of the sector is supported by the vertical columns. The sector scale 6 is read through the crossbeam 52. The temperature is accurately displayed through the scale of the sector scale 6, making it convenient for operators to read.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. 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 its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A temperature monitoring apparatus for ion nitriding treatment, characterized by, The utility model relates to a kind of frame, including outer frame (1), vertical column one (2), vertical column two (3), vertical column three (4), enlarged vertical column (7), crossbeam (5) and sector scale (6), the outer frame (1) includes four pieces of rigid rectangular material end to end, the vertical column one (2) end point is vertically fixedly connected with the top inner surface of outer frame (1), and the vertical column two (3) is connected with the crossbeam, and the crossbeam includes crossbeam one (51), crossbeam two (52) and rotating connecting rod (53), the crossbeam one (51) is parallel with crossbeam two (52), and the rotating connecting rod (53) two ends are respectively connected with crossbeam one (51) and crossbeam two (52) rotation, the vertical column one (2) end is vertically fixedly connected with the top inner surface of outer frame (1), and the other end is hinged with the end of crossbeam one (51), the vertical column two (3) one end is vertically fixedly connected with the bottom inner surface of outer frame (1), and the other end is hinged with the side wall of crossbeam one (51), the crossbeam two (52) is away from rotating connecting rod (53) one end and is rotationally connected with the center angle of sector scale (6), the vertical column three (4) one end is vertically fixedly connected with the bottom inner surface of outer frame (1), and the other end is hinged with the bottom of sector scale (6), and the enlarged vertical column (7) is rotationally connected with crossbeam two (52).

2. A temperature monitoring apparatus for ion nitriding treatment according to claim 1, wherein The vertical column one (2), vertical column two (3), vertical column three (4) and enlarged vertical column (7) are made of austenitic stainless steel.

3. A temperature monitoring apparatus for ion nitriding treatment according to claim 1, wherein The crossbeam one (51) is away from vertical column one (2) one end and is further provided with counterweight (54).

4. The temperature monitoring apparatus for ion nitriding process according to claim 1, wherein The sector scale (6) is further provided with through hole (61) which is same as the shape of sector scale (6).

5. A temperature monitoring apparatus for ion nitriding treatment according to claim 4, wherein The arc edge of sector scale (6) is further provided with scale.

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