Sand mould hardness detection tool

Abstract

The utility model provides a kind of sand mould hardness detection tool, comprising: support and steel drill, wherein, support is in contact on sand box grid, and through hole is set in support;Steel drill includes shell, cylinder, spring and steel needle, wherein, cylinder is slidably arranged in the inside of shell;Spring is arranged in the inside of shell and cylinder;The one end of steel needle is connected with the bottom of cylinder, and the one end of steel needle sequentially penetrates shell and through hole.The sand mould hardness detection tool of the utility model embodiment can quantitatively control the mould strength, has low technical requirements for workers, thereby reducing the damage rate of sand mould and casting rejection caused by low sand mould strength.

Description

Technical Field

[0001] This utility model relates to the field of sand casting technology, and in particular to a sand mold hardness testing tool. Background Technology

[0002] Sand casting, a widely used metal forming process, is based on the use of sand grains (raw sand) as molding materials. The sand grains are bonded together with a binder to form a mold (sand mold and sand core) with a certain strength and shape, which is then used to pour molten metal to obtain a casting of the desired shape.

[0003] During resin sand casting, the sand mold hardens inside the sand box. On-site operators need to judge the demolding time. The current method for testing the strength of the sand mold is usually for employees to insert thin steel bars into the sand mold and judge the degree of hardening based on their personal experience. However, the experience level of employees is inconsistent, and the judgment results are quite different. It is easy to find that the sand mold is not hardened in place, which will cause the sand mold to deform or collapse after demolding and be scrapped. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, one objective of this utility model is to provide a sand mold hardness testing tool that can quantitatively control the mold release strength, requires less technical expertise from workers, and thus reduces the damage rate of sand molds and castings scrapped due to low sand mold strength.

[0006] To achieve the above objectives, the first aspect of this utility model provides a sand mold hardness testing tool, comprising: a support and a steel rod, wherein the support abuts against the sand box grid and has a through hole; the steel rod comprises a shell, a cylinder, a spring, and a steel needle, wherein the cylinder is slidably disposed inside the shell; the spring is disposed inside the shell and the cylinder; one end of the steel needle is connected to the bottom of the cylinder, and one end of the steel needle passes through the shell and the through hole in sequence.

[0007] In addition, the sand mold hardness testing tool proposed above according to this utility model may also have the following additional technical features:

[0008] Specifically, the outer wall of the steel needle is provided with multiple equidistant markings.

[0009] Specifically, a plate is slidably disposed inside the housing, one end of the spring abuts against the plate, and a knob is rotatably connected to the housing, the knob being threadedly connected to the plate.

[0010] Specifically, a strip-shaped level is provided on the bracket.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The sand mold hardness testing tool of the present invention, by placing the bracket on the sand box grid, passing the steel rod through the bracket, pressing the top of the steel rod, and under the action of the elastic potential energy of the spring, the steel needle penetrates into the interior of the sand mold. The depth of the steel needle inserted into the sand mold is used to determine whether the conditions for demolding are met, thereby quantitatively controlling the demolding strength. It has low technical requirements for workers, thereby reducing the damage rate of sand molds and castings scrapped due to low sand mold strength.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0014] Figure 1 This is a cross-sectional structural schematic diagram of a sand mold hardness testing tool according to an embodiment of the present invention;

[0015] Figure 2 This is a three-dimensional structural diagram of a sand mold hardness testing tool according to an embodiment of the present invention.

[0016] Reference numerals: 1. Bracket; 11. Through hole; 2. Steel rod; 21. Shell; 22. Cylinder; 23. Spring; 24. Steel needle; 31. Marking line; 41. Plate; 42. Knob; 51. Strip level. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] The following describes an embodiment of the sand mold hardness testing tool with reference to the accompanying drawings.

[0019] like Figures 1-2 As shown, the sand mold hardness testing tool of this utility model embodiment may include: a bracket 1 and a steel rod 2.

[0020] The bracket 1 abuts against the sand box grid, and the bracket 1 has a through hole 11.

[0021] The steel rod 2 includes a housing 21, a cylinder 22, a spring 23, and a steel needle 24. The cylinder 22 is slidably disposed inside the housing 21, the spring 23 is disposed inside the housing 21 and the cylinder 22, one end of the steel needle 24 is connected to the bottom of the cylinder 22, and one end of the steel needle 24 passes through the housing 21 and the through hole 11 in sequence.

[0022] Specifically, when using this tool to test the hardness of the target sand mold, first place the support 1 on the sand box grid, and then insert one end of the steel rod 2 into the through hole 11.

[0023] The relevant technicians press the shell 21, and the spring 23 is compressed, thereby pushing the cylinder 22 and the steel needle 24 to penetrate into the sand mold until the shell 21 contacts the support 1. Then the steel rod 2 is pulled out and the depth of the steel rod 2 inserted into the sand mold is measured. If it is lower than the target depth, the demolding strength is reached and the mold can be demolded.

[0024] The above method can quantitatively control the mold release strength, requires less technical skill from workers, and thus reduces the damage rate of sand molds and castings due to low sand mold strength.

[0025] In one embodiment of this utility model, such as Figure 1 As shown, the outer wall of the steel needle 24 is provided with multiple equidistant marking lines 31.

[0026] It is understandable that multiple equidistant markings 31 are set on the outer wall of the steel needle 24 so that relevant technicians can directly read the depth of the steel needle 2 inserted into the sand mold after pulling out the steel rod 2.

[0027] In one embodiment of this utility model, such as Figure 1 As shown, a plate 41 is slidably disposed inside the housing 21, one end of the spring 23 abuts against the plate 41, and a knob 42 is rotatably connected to the housing 21, with the knob 42 threadedly connected to the plate 41.

[0028] As a possible scenario, during long-term use, the elastic potential energy of spring 23 may decrease compared to its initial state, thus affecting the depth to which steel needle 24 is inserted into the sand mold.

[0029] Initially, the relevant technicians can place the steel rod 2 upside down and mark the position on the steel needle 24 that is horizontal with the bottom of the housing 21. During later use, the relevant technicians will invert and reset the rod each time. If the marked position is found to have changed, it indicates that the elastic potential energy of the spring 23 has changed.

[0030] At this time, the knob 42 can be rotated. The knob 42 is threadedly connected to the plate 41. The plate 41 moves to compress the spring 23, thereby changing the elastic potential energy of the spring 23 and achieving the correction effect.

[0031] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, a strip-type level 51 is installed on the bracket 1.

[0032] Understandably, when using this tool to test the hardness of the sand mold, relevant technicians can observe the strip level 51 to ensure that the support 1 is placed horizontally so that the steel needle 24 can be inserted vertically into the sand mold.

[0033] In summary, the sand mold hardness testing tool of this utility model, by placing a bracket on the sand box grid, passing a steel rod through the bracket, pressing the top of the steel rod, and under the action of the elastic potential energy of the spring, the steel needle penetrates into the interior of the sand mold. The depth of the steel needle insertion into the sand mold determines whether the conditions for demolding are met, thereby quantitatively controlling the demolding strength. It has low technical requirements for workers, thereby reducing the damage rate of sand molds and castings scrapped due to low sand mold strength.

[0034] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sand mold hardness testing tool, characterized in that, include: The bracket (1) and the steel rod (2), wherein, The bracket (1) abuts against the sand box grid, and the bracket (1) has a through hole (11). The steel rod (2) includes a shell (21), a cylinder (22), a spring (23), and a steel needle (24), wherein, The cylindrical body (22) is slidably disposed inside the housing (21); The spring (23) is disposed inside the housing (21) and the cylinder (22); One end of the steel needle (24) is connected to the bottom of the cylinder (22), and the other end of the steel needle (24) passes through the shell (21) and the through hole (11) in sequence.

2. The sand mold hardness testing tool according to claim 1, characterized in that, The outer wall of the steel needle (24) is provided with multiple equidistant marking lines (31).

3. The sand mold hardness testing tool according to claim 1, characterized in that, A plate (41) is slidably disposed inside the housing (21), one end of the spring (23) abuts against the plate (41), and a knob (42) is rotatably connected to the housing (21), and the knob (42) is threadedly connected to the plate (41).

4. The sand mold hardness testing tool according to claim 1, characterized in that, A strip-shaped level (51) is provided on the bracket (1).

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