Automatic testing device for fluidity of spherical alloy powder

Abstract

The utility model relates to the field of spherical alloy powder performance detection, in particular to an automatic testing device for fluidity of spherical alloy powder. Comprising a funnel fixing support, a support fixing rod and a conical funnel, and an electromagnetic valve, a vibration-free horizontal base, a powder containing tray, an infrared transmitter, an infrared signal receiving plate and a stopwatch are installed at a leakage hole in the lower portion of the conical funnel. According to the utility model, the electromagnetic valve is used for controlling the flowing of the powder in the funnel, and the stopwatch is controlled to start by using an infrared signal, so that the flowing time of the powder in the funnel is accurately recorded, the operation error caused by manual timing detection can be effectively avoided, and the flowing property of the alloy powder can be effectively detected.

Description

Technical Field

[0001] The utility model relates to the field of spherical alloy powder performance detection, in particular to an automatic testing device for the fluidity of spherical alloy powder. Background Art

[0002] In recent years, the rapid development of additive manufacturing technology has promoted the prosperity of the spherical alloy powder market, but at the same time, it has also put forward higher requirements on the characteristics of powders such as powder particle size, sphericity, hollow powder and fluidity. Among them, the fluidity of spherical alloy powder has a direct impact on the spreading of the powder layer and subsequent laser scanning in the additive manufacturing process. Therefore, the fluidity of spherical alloy powder is an important performance indicator of alloy powder in the additive manufacturing process. At present, the test of alloy powder fluidity usually refers to the national standard "Standard Funnel Method for Determination of Metal Powder Fluidity (Hall Rheometer) GB / T 1482-2022". However, the alloy powder fluidity test conducted according to the current standard adopts a manual operation method, which requires manual operation of the funnel and use of a stopwatch for timing. The experimental tester starts timing when the powder starts to flow out from the bottom of the funnel and ends timing when the powder flows out of the funnel completely. The powder fluidity is obtained in units of s / 50g, but due to the human influence factors in the test process, the test results of powder fluidity have poor accuracy. For the same batch of alloy powders, different experimental testers use the same operating procedures and test standards to test the difference up to 0.5s. According to the current standard "GB / T 1482-2022", the recording time must be accurate to 0.1s. In order to more accurately test the powder flow properties, ensure the controllable accuracy during the test process and thus ensure the controllable product quality, this utility model is proposed. Summary of the invention

[0003] The main purpose of the utility model is to provide an automatic test device for the fluidity of spherical alloy powders. The technical problem to be solved is to avoid the fluidity test error caused by manual operation timing, and to more simply and efficiently test the fluidity of alloy powders accurately, so as to achieve the purpose of monitoring the fluidity performance of powders. The technical solution of the utility model is:

[0004] An automatic testing device for the fluidity of spherical alloy powder includes a funnel fixing bracket, a bracket fixing rod, a conical funnel, an electromagnetic valve, a vibration-free horizontal base, a powder tray, an infrared transmitter, an infrared signal receiving board and a stopwatch. The specific structure is as follows:

[0005] The funnel fixing bracket is connected to the bracket fixing rod, the bracket fixing rod is installed on the vibration-free horizontal base, the conical funnel is placed in the funnel fixing bracket, and an electromagnetic valve is installed at the leakage hole below the conical funnel to control the flow of powder by the valve switch; a powder containing tray is placed on the vibration-free horizontal base, the powder containing tray is located below the square conical funnel, and the infrared transmitter and infrared signal receiving board are distributed on both sides of the vibration-free horizontal base. In order to more accurately record the time required for the powder to flow out completely, the infrared signal receiving board is connected to a stopwatch.

[0006] The above-mentioned automatic testing device for the fluidity of spherical alloy powder has a preferred embodiment in which a threaded hole is provided on the side of the funnel fixing bracket, and the funnel fixing bracket is connected to the bracket fixing rod through the threaded hole to realize the up and down movement of the funnel fixing bracket.

[0007] The advantages and beneficial effects of the utility model are: the powder is controlled to fall from the flow outlet below the funnel in the direction of gravity by the solenoid valve switch, the timing is started by shielding the infrared signal, and the timing ends when the powder completely flows out and falls into the tray, thereby recording the time required for the specified weight of powder to flow out of the funnel. The device can effectively avoid errors caused by manually operating the timer and different operating habits, so as to more accurately evaluate the fluidity of the alloy powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of an automatic testing device for the fluidity of spherical alloy powders;

[0009] In the figure: 1- bracket fixing rod, 2- funnel fixing bracket, 3- alloy powder, 4- conical funnel, 5- solenoid valve, 6- powder tray, 7- infrared transmitter, 8- infrared signal receiving board, 9- stopwatch; 10- vibration-free horizontal base. DETAILED DESCRIPTION

[0010] In order to better illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. Example 1

[0011] like Figure 1 As shown, an automatic test device for the fluidity of spherical alloy powder includes a funnel fixing bracket 2, a bracket fixing rod 1, a conical funnel 4, a solenoid valve 5, a vibration-free horizontal base 10, a powder tray 6, an infrared transmitter 7, an infrared signal receiving board 8 and a stopwatch 9, and its specific structure is as follows:

[0012] There is a threaded hole on the side of the funnel fixing bracket 2, which is connected to the bracket fixing rod 1 through the threaded hole to realize the up and down movement of the funnel fixing bracket 2. The bracket fixing rod 1 is installed on the vibration-free horizontal base 10, and the conical funnel 4 is placed in the funnel fixing bracket 2. An electromagnetic valve 5 is installed at the leakage hole below the conical funnel 4, and the powder flow is controlled by the valve switch; a powder tray 6 is placed on the vibration-free horizontal base 10, and the powder tray 6 is located below the square cone funnel 4. The infrared transmitter 7 and the infrared signal receiving board 8 are distributed on both sides of the vibration-free horizontal base 10. In order to more accurately record the time required for the powder to flow out completely, the infrared signal receiving board 8 is connected to a stopwatch 9.

[0013] The method of using the above-mentioned spherical alloy powder fluidity automatic testing device is as follows: first, place the conical funnel 4 on the funnel fixing bracket 3, then adjust the funnel fixing bracket 3 to a specified height and fix it on the bracket fixing rod 1, adjust the solenoid valve 5 to close it, and then use an electronic balance to weigh 50g of alloy powder 3 and put it into the conical funnel 4, adjust the position of the infrared transmitter 7 so that it hits the infrared signal receiving board 8 completely and makes the infrared light beam pass under the center of the conical funnel 4, adjust the stopwatch 9 so that its reading returns to 0, and then control the solenoid valve 5 to open, and the alloy powder 3 flows out through the leakage hole under the conical funnel 4. When the light beam passes between the infrared transmitter 7 and the infrared signal receiving board 8, the light signal received by the infrared receiving board 8 is changed due to the light beam being blocked, and the electrical signal is transmitted to the stopwatch 9 to start timing. When the alloy powder 3 in the conical funnel 4 flows out completely, the infrared signal receiving board 8 can receive the complete infrared signal again, and the timing is ended. The stopwatch timing is read as the flow time of 50g alloy powder.

Claims

1. An automatic testing device for the fluidity of spherical alloy powder, characterized in that: It includes a funnel fixing bracket, a bracket fixing rod, a conical funnel, a solenoid valve, a vibration-free horizontal base, a powder tray, an infrared transmitter, an infrared signal receiving board and a stopwatch, and its specific structure is as follows: The funnel fixing bracket is connected to the bracket fixing rod, the bracket fixing rod is installed on the vibration-free horizontal base, the conical funnel is placed in the funnel fixing bracket, an electromagnetic valve is installed at the leakage hole below the conical funnel, a powder containing tray is placed on the vibration-free horizontal base, the powder containing tray is located below the square conical funnel, an infrared transmitter and an infrared signal receiving board are distributed on both sides of the vibration-free horizontal base, and the infrared signal receiving board is connected to a stopwatch.

2. The automatic testing device for the fluidity of spherical alloy powder according to claim 1, characterized in that: There are threaded holes on the side of the funnel fixing bracket, which are connected to the bracket fixing rod through the threaded holes to achieve the up and down movement of the funnel fixing bracket.

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