A density testing device for aluminum alloy forgings

Abstract

This invention discloses a density testing device for aluminum alloy forgings, comprising a weighing body with an open water tank mounted on it, and a suspension assembly fixedly mounted above the weighing body, the suspension assembly being partially submerged in the open water tank. This invention uses the suspension assembly to feed the aluminum alloy forging into the open water tank to measure the true volume of the forging. During the process, the volume of the suspension assembly can be directly obtained and subtracted, avoiding any influence on the true volume value of the aluminum alloy forging. Simultaneously, a sliding rail and servo motor are used to stably and uniformly feed the aluminum alloy forging below the liquid surface in the open water tank, minimizing liquid level fluctuations and allowing for suspension at any time for measurement. Furthermore, an air bubble elimination device and a temperature sensor can be added to further minimize the influence of external factors on the true volume value of the aluminum alloy forging.

Description

Technical Field

[0001] This utility model relates to the field of density testing equipment, and in particular to a density testing device for aluminum alloy forgings. Background Technology

[0002] Current technology uses ropes to suspend the forgings submerged in water, and based on Archimedes' principle of buoyancy, indirectly calculates the volume by measuring the weight of the displaced material (or the change in liquid level). However, the rope portion submerged in water also displaces a certain volume of water, leading to a systematic overestimation of the measurement results. For high-density aluminum alloy forgings, whose volume is already small, the relative error introduced by the rope is particularly significant, thus affecting the density calculation results of the aluminum alloy forgings. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes an aluminum alloy forging density testing device that completely eliminates the volume error introduced by the suspension mechanism, realizes the true value measurement of the volume of aluminum alloy forgings, and thus accurately calculates the density of aluminum alloy forgings.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a density testing device for aluminum alloy forgings, including a weighing body, an open water tank that can be provided on the weighing body, and a suspension assembly fixedly provided above the weighing body, the suspension assembly being partially submerged in the open water tank. To ensure that the drainage volume of the suspension assembly remains zero or can be precisely calibrated to zero during the measurement process, the suspension assembly further includes: The support frame is fixedly installed based on the scale body; The lifting bridge is mounted on the support frame and can reciprocate along the height direction of the support frame; A drive assembly is fixedly mounted on the support frame and drives the lifting bridge to move on the support frame; A rigid connecting rod is fixedly mounted on the lifting bridge, and a tray may be provided at its end.

[0005] To ensure the stability of the vertical reciprocating motion of the lifting bridge, a slide rail is further provided on the support frame, and a slide groove is provided on the side of the lifting bridge facing the support frame, with the slide rail embedded in the slide groove.

[0006] To ensure the accuracy of the movement distance of the lifting bridge during vertical reciprocating motion, the drive assembly further includes a servo motor and a lead screw. The lead screw is coaxially fixed with the shaft of the servo motor, and the lead screw is threadedly engaged with the lifting bridge.

[0007] To facilitate fixing the pallet to the underside of the lifting bridge with rigid connecting rods, the rigid connecting rods are further provided in multiple forms, with one end of each rigid connecting rod fixedly connected to the lifting bridge and the other end having a limiting groove that mates with the edge of the pallet.

[0008] To facilitate determining the length of the rigid connecting rod submerged in the open water tank, a scale is further provided along the length direction of the rigid connecting rod.

[0009] To ensure a constant liquid level in the open water tank and to accurately measure the weight of the drained water, an overflow outlet is provided above the open water tank, and an overflow trough is fixedly installed on the outer edge of the open water tank.

[0010] To eliminate air bubbles adhering to the surface of the forging and the tray, and to avoid underestimating the volume measurement value, an air bubble elimination device is further fixedly installed at the bottom of the open water tank.

[0011] To monitor and assist in regulating the water temperature to ensure the accuracy of the volume calculation value of the aluminum alloy forging, a temperature sensor is further included, which is fixedly installed on the open water tank.

[0012] Compared with the prior art, the beneficial effects of this utility model include: 1) The true volume of the aluminum alloy forging is measured by sending it into an open water tank using a suspension assembly. During the process, the volume of the suspension assembly can be directly obtained and deducted to avoid affecting the true volume value of the aluminum alloy forging. 2) By using a slide rail and servo motor, the aluminum alloy forging is stably and uniformly fed into the open water tank below the liquid surface, with minimal liquid surface fluctuations, and can be suspended at any time for measurement. 3) The bubble elimination device and temperature sensor can better avoid the influence of external factors on the true value of the volume of aluminum alloy forgings. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The schematic diagram illustrates the overall structure of the aluminum alloy forging density testing device according to the first embodiment of the present invention; Figure 2 Schematic representation Figure 1 The scene of the aluminum alloy forging along with part of the suspension components submerged in the liquid; Figure 3The schematic diagram illustrates the overall structure of the aluminum alloy forging density testing device according to the second embodiment of the present invention; Figure 4 Schematic representation Figure 3 The fit between the edge of the lifting bridge and the support frame in area A; The numbers in the diagram are: 1-Scale body, 2-Open water tank, 3-Suspension assembly, 31-Support frame, 32-Lifting bridge, 33-Drive assembly, 331-Servo motor, 332-Lead screw, 34-Rigid connecting rod, 35-Plate, 4-Overflow port, 5-Overflow water tank. Detailed Implementation

[0014] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0015] A density testing device for aluminum alloy forgings, such as Figure 1 As shown, the system includes a weighing body 1 with an accuracy of 0.1g or higher. An open water tank 2 can be installed on the weighing body 1, containing sufficient water. The mass of the aluminum alloy forging can be weighed by directly placing it on the weighing body 1. Then, by setting the open water tank 2 on the weighing body 1, the aluminum alloy forging is immersed and suspended below the liquid surface. The volume data of the aluminum alloy forging is indirectly obtained by applying Archimedes' principle of buoyancy and combining it with the change in the reading of the weighing body 1, thereby directly obtaining the density of the aluminum alloy forging.

[0016] In the aforementioned process, such as Figure 2 As shown, when the aluminum alloy forging is immersed and suspended below the liquid surface, a suspension component 3 is used. This suspension component 3 can be partially submerged in the open water tank 2. Similarly, by applying Archimedes' principle of buoyancy, without placing the aluminum alloy forging, the suspension component 3 is directly submerged below the liquid surface. The scale body 1 can then directly display the volume value of the portion of the suspension component 3 submerged in the liquid. This volume value can then be recorded and used for subsequent calculations of the aluminum alloy forging volume value, or the tare function of the scale body 1 can be used to remove the influence of this volume value on the subsequent aluminum alloy forging volume data.

[0017] Using a rope, the aluminum alloy forging can only be partially submerged in water under its own weight. Simply placing the rope in the water may cause it to float on the surface, making it difficult to obtain its volume value. An additional standard block is required to obtain the volume data of the partially submerged part of the rope. Furthermore, during the suspension process, the rope will continuously swing around the fixed point, disturbing the liquid surface and affecting the reading of scale 1. The reading of scale 1 fluctuates significantly and takes a long time to stabilize, affecting the efficiency and accuracy of volume measurement of aluminum alloy forgings.

[0018] To differentiate this method from the previous method of using ropes to bind aluminum alloy forgings and then suspending them in water to measure their volume, the ropes are replaced with suspension assembly 3. The suspension assembly 3 is described in detail below.

[0019] The suspension assembly 3 includes a support frame 31, which includes a support beam and legs vertically fixed to both ends of the support beam. The end of any leg furthest from the support beam can be fixed to the side of the scale body 1 or directly to the base below the scale body 1. A drive assembly 33 is mounted on the aforementioned support beam. The drive assembly 33 includes a servo motor 331 and a lead screw 332. The lead screw 332 is coaxially fixed to the shaft of the servo motor 331, meaning the servo motor 331 drives the lead screw 332 to rotate synchronously.

[0020] It also includes a lifting bridge 32, as in the first embodiment, such as Figure 1 As shown, the lifting bridge 32 is simply a horizontal bar or a regular plate plane, and the width of the lifting bridge 32 is smaller than the width of the support frame 31. The lifting bridge 32 is threadedly engaged with the aforementioned lead screw 332, so that when the servo motor 331 drives the lead screw 332 to rotate, the lifting bridge 32 can move along the length direction of the lead screw 332. In the second embodiment, as... Figure 3 As shown, the length of the lifting bridge 32 is increased until its edge can be close to the support frame 31, and a slide rail is fixedly installed on the support legs, as shown in the figure. Figure 4 As shown, a groove is provided on the side of the lifting bridge 32 facing the support leg. The aforementioned slide rail is embedded in the groove, which can guide the movement of the lifting bridge 32 while ensuring the smooth reciprocating movement of the lifting bridge 32 based on the length direction of the support leg. This facilitates the relative stability of the reading of the scale body 1 during the subsequent volume test of the aluminum alloy forging.

[0021] The suspension assembly 3 also includes a tray 35 for supporting aluminum alloy forgings. The tray 35 can be based on the first embodiment of the aforementioned lifting bridge 32, with rigid connecting rods 34 added to both ends of the lifting bridge 32. There can be multiple rigid connecting rods 34, one end of which is fixedly connected to the lifting bridge 32, and the other end is provided with a limiting groove that matches the edge of the tray 35. The tray 35 is directly embedded into the limiting groove to complete the locking and fixing of the lifting bridge 32 and the tray 35. Alternatively, the tray 35 can be based on the second embodiment of the aforementioned lifting bridge 32, with a limiting groove provided on the opposite side of the lifting bridge 32. The tray 35 is directly embedded into the limiting groove to complete the locking and fixing of the lifting bridge 32 and the tray 35.

[0022] In a further embodiment, a scale may be provided along the length of the rigid connecting rod 34 to determine its depth submerged in the liquid.

[0023] Let G be the mass of the aluminum alloy forging to be measured, and F be the buoyant force on the aluminum alloy forging in water. When measuring the density of the aluminum alloy forging, first, place the aluminum alloy forging directly on scale 1 and measure its weight G. The reading on scale 1 is W1. Then, place an open water tank 2 filled with sufficient water on the same scale 1 or place the open water tank 2 directly on another scale 1. After estimating the height of the aluminum alloy forging, partially submerge the suspension assembly 3 in the water and complete the tare operation on scale 1. Then, place the aluminum alloy forging on tray 35 and submerge the suspension assembly 3 by the same volume in water. This can be adjusted using the scale on the rigid connecting rod 34. The reading on scale 1 is W2. W1 is the net weight of the aluminum alloy forging in air, and W2 is the apparent weight of the aluminum alloy forging in water.

[0024] Based on the aforementioned equations (1) and (2), the volume V of the aluminum alloy forging is calculated as follows:

[0025] Then, the density of the aluminum alloy forging to be measured can be obtained according to formulas (1) and (3).

[0026] To further ensure the accuracy of the measurement results and thus guarantee the accurate calculation of the density of the aluminum alloy forging, in some embodiments, an air bubble elimination device, such as an ultrasonic vibrator, is fixedly installed at the bottom of the open water tank 2. This device is briefly activated when the aluminum alloy forging is immersed to eliminate air bubbles adhering to the forging and the surface of the tray 35, thereby preventing the measured volume of the aluminum alloy forging from being underestimated. Simultaneously, a temperature sensor can be installed above the open water tank 2 to monitor the water temperature in real time. Adjustments can then be made based on the water temperature data to maintain the water temperature in the open water tank 2 at approximately 4°C, further ensuring the true value measurement of the aluminum alloy forging's volume.

[0027] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A density testing device for aluminum alloy forgings, characterized in that, Includes a weighing body (1), on which an open water tank (2) may be provided, and a suspension assembly (3) is fixedly provided above the weighing body (1), wherein the suspension assembly (3) may be partially submerged in the open water tank (2); The suspension assembly (3) includes: A support frame (31) is fixedly installed based on the scale body (1); The lifting bridge (32) is mounted on the support frame (31) and can reciprocate along the height direction of the support frame (31); The drive assembly (33) is fixedly mounted on the support frame (31) and drives the lifting bridge (32) to move on the support frame (31); A rigid connecting rod (34) is fixedly mounted on the lifting bridge (32), and a tray (35) may be provided at its end.

2. The density testing equipment for aluminum alloy forgings according to claim 1, characterized in that, A slide rail is provided on the support frame (31), and a slide groove is provided on the side of the lifting bridge (32) facing the support frame (31), and the slide rail is embedded in the slide groove.

3. The density testing equipment for aluminum alloy forgings according to claim 2, characterized in that, The drive assembly (33) includes a servo motor (331) and a lead screw (332). The lead screw (332) is coaxially fixed with the shaft of the servo motor (331), and the lead screw (332) is threadedly engaged with the lifting bridge (32).

4. The density testing equipment for aluminum alloy forgings according to claim 1, characterized in that, The rigid connecting rod (34) consists of multiple rods. One end of each rod is fixedly connected to the lifting bridge (32), and the other end is provided with a limiting groove that matches the edge of the tray (35).

5. The density testing equipment for aluminum alloy forgings according to claim 4, characterized in that, A scale is provided along the length of the rigid connecting rod (34).

6. The density testing equipment for aluminum alloy forgings according to claim 1, characterized in that, An air bubble elimination device is fixedly installed at the bottom of the open water tank (2).

7. The density testing equipment for aluminum alloy forgings according to claim 1, characterized in that, It also includes a temperature sensor, which is fixedly mounted on the open water tank (2).

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