Device for manufacturing small-diameter welding wire detection material sample

Abstract

The utility model discloses a device for manufacturing a small-diameter welding wire detection material sample. The device comprises a smelting furnace (3) of which a furnace chamber can be filled with inert gas, and a forming mold arranged in the smelting furnace, the forming die comprises a female die (1) with an inner concave cavity and a male die (2) matched with the female die. An inner concave cavity of the concave die (1) is a cylindrical cavity which is formed in the center of the concave die and has a downward indented trapezoidal bottom end; the male die (2) comprises a top plate (2a) and a cylinder pressing head (2b) which is located in the center of the bottom face of the top plate and extends downwards, and the cylinder pressing head (2b) can be inserted into the cylindrical cavity. The device is simple in structure, welding wire detection samples are convenient and efficient to manufacture, the samples are manufactured in the inert gas environment, welding wires cannot be oxidized, and it is guaranteed that the composition and content of the welding wires are detected accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of a material sample preparation device using a spark direct-reading spectrometer to detect and analyze chemical component content, in particular to a material sample preparation device for chemical component detection of a small-diameter welding wire used in a steel structure project. Background Art

[0002] At present, the most widely used methods for detecting the chemical composition of welding wire in the industry are chemical analysis and spectral analysis. The chemical analysis method is to use appropriate separation means to separate the measured element from other components in the metal, and then use the weighing method to measure the element content, or use a standard solution to completely react with the measured element in the metal, and then calculate the content of the measured element based on the volume of the consumed standard solution. Various elements can produce their own unique spectra under high temperature and high energy excitation. Spectral analysis is to determine the chemical composition and content of the metal based on the characteristic spectrum produced after the element is excited. In order to directly use the spark direct reading spectrometer to analyze the chemical composition of small diameter welding wire (diameter not exceeding 5mm) and effectively improve the efficiency and accuracy of the chemical composition analysis of welding wire, it is necessary to make the small diameter welding wire into a test material sample that can be read by the spark direct reading spectrometer. Therefore, it is necessary to design a device that is convenient for making small diameter welding wire test material samples. Summary of the invention

[0003] The purpose of the utility model is to directly use an existing spark direct-reading spectrometer in the laboratory to quantitatively analyze the chemical composition of the welding wire, which can effectively improve the efficiency and accuracy of the quantitative analysis of the chemical composition of the welding wire, so as to achieve the purpose of smoothly, quickly and accurately detecting the chemical composition of small-diameter welding wire.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A device for producing a small-diameter welding wire testing material sample comprises a smelting furnace (3) into which an inert gas can be introduced, and a forming mold arranged in the smelting furnace; the forming mold comprises a female mold (1) with an inner concave cavity, and a male mold (2) matching the female mold; the inner concave cavity of the female mold (1) is a cylindrical cavity opened at the center of the female mold, the bottom end of which is a downwardly indented trapezoidal cavity; the male mold (2) comprises a top plate (2a) and a cylindrical pressure head (2b) located at the center of the bottom surface of the top plate and extending downward, and the cylindrical pressure head (2b) can be inserted into the cylindrical cavity.

[0006] Furthermore, the diameter of the cylindrical cavity is greater than the diameter of the cylindrical pressure head by less than 2 mm.

[0007] By adopting the utility model, the forming mold can be placed in the inert gas environment of the smelting furnace, a plurality of small-diameter welding wires with a diameter of only 1.2 to 5 mm can be placed in the cylindrical cavity of the concave mold, the cylindrical pressure head of the punch can be inserted into the cylindrical cavity, the welding wires can be pressed tightly in the trapezoidal cavity at the lower end of the cylindrical cavity, the welding wires can be melted by heating under the protection of the inert gas, and then the forming mold can be taken out of the smelting furnace, placed on a universal testing machine for compaction, and a test sample that meets the size requirements of the spark direct-reading spectrometer can be obtained, so that the chemical composition of the welding wire can be directly analyzed by the spark direct-reading spectrometer, and the efficiency and accuracy of the chemical composition analysis of the welding wire can be effectively improved.

[0008] The utility model has a simple structure, is convenient and efficient in preparing welding wire detection samples, and the samples are prepared in an inert gas environment, so the welding wire will not be oxidized, thereby ensuring accurate detection of welding wire composition and content. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a schematic diagram of the cross-sectional structure of the forming die;

[0011] Figure 3 It is a schematic diagram of placing the molding die on the universal testing machine and pressing it. DETAILED DESCRIPTION

[0012] The content of the utility model is further described below in conjunction with the accompanying drawings of the specification.

[0013] like Figure 1 , Figure 2 As shown, a device for making a small diameter welding wire test material sample includes a smelting furnace 3 and a forming mold arranged in the smelting furnace. The smelting furnace can be a conventional electric furnace, which is equipped with a temperature control device and a timer, etc., and an air inlet 3a for introducing an inert gas into the furnace cavity is arranged on the furnace wall. The forming mold is as shown in FIG. Figure 2 As shown, it includes a die 1 with a concave cavity and a convex die 2 matched with the die. The concave cavity of the die 1 is a cylindrical cavity with a trapezoidal shape indented downward at the bottom end opened in the center of the die; the convex die 2 includes a top plate 2a and a cylindrical pressure head 2b extending downward from the center of the bottom surface of the top plate, the cylindrical pressure head 2b matches the cylindrical cavity, and the diameter of the cylindrical cavity is slightly larger than the diameter of the cylindrical pressure head. Generally, the diameter of the cylindrical cavity is controlled to be within 2 mm larger than the diameter of the cylindrical pressure head. The pressure head can be inserted into the cylindrical cavity and stop at the top of the trapezoidal section, leaving a trapezoidal cavity section for filling the welding wire 5.

[0014] The process of making the test material sample by using the utility model is as follows: a plurality of small-diameter welding wires with a diameter of only 1.2 to 5 mm are placed in the cylindrical cavity of the concave die 1, and the cylindrical pressure head 2b of the convex die 2 is inserted into the cylindrical cavity to compact the welding wires. The forming mold is placed in the melting furnace 3, and an inert gas is introduced. The melting furnace is turned on to heat up, and the welding wires are heated and softened. Then the forming mold is taken out of the melting furnace. Figure 3 As shown, it is placed on the upper and lower pressure heads 4 of the universal testing machine and compacted until there is no gap, and the cross-sectional area can reach 8mm 2 The above test sample 6, then the forming mold is placed in a dryer to cool to room temperature, and the bottom of the die 1 is machined to expose the welding wire for testing. The sample size meets the requirements of the spark direct reading spectrometer, and then the spark direct reading spectrometer can be used directly to analyze the chemical composition of the welding wire, effectively improving the efficiency and accuracy of the chemical composition analysis of the welding wire.

[0015] The forming mold of the utility model is made of materials that can withstand high temperature and high pressure, ensuring that it will not deform when heated to a temperature of 1000-1250° C. in a smelting furnace, and can withstand a pressure of 800kN without deformation when placed on a universal testing machine for pressure application.

Claims

1. A device for preparing a small diameter welding wire test material sample, characterized in that: The invention comprises a smelting furnace (3) into which an inert gas can be introduced, and a forming mold arranged in the smelting furnace; the forming mold comprises a female mold (1) with an inner concave cavity, and a male mold (2) matching the female mold; the inner concave cavity of the female mold (1) is a cylindrical cavity opened at the center of the female mold, the bottom end of which is a downwardly indented trapezoidal cavity; the male mold (2) comprises a top plate (2a) and a cylindrical pressure head (2b) extending downwardly and located at the center of the bottom surface of the top plate, and the cylindrical pressure head (2b) can be inserted into the cylindrical cavity.

2. The device for preparing a small diameter welding wire testing material sample according to claim 1, characterized in that: The diameter of the cylindrical cavity of the female die (1) is within 2 mm greater than the diameter of the cylindrical pressure head of the male die (2).

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