Machine for testing compression strength and bending strength of molding sand

Abstract

The utility model relates to the technical field of molding sand strength detection, in particular to a molding sand compression and bending strength testing machine. Comprising a testing table, fixing plates are symmetrically arranged at the left end and the right end of the top of the testing table, hydraulic cylinders are symmetrically arranged on the fixing plates, sliding plates are arranged at the driving ends of the hydraulic cylinders, the front ends and the rear ends of the sliding plates are slidably connected with guide rods correspondingly, and a compression resistance detection block is arranged on the right side wall of the sliding plate on the left side; a movable anti-bending detection head is arranged on the left side wall of the sliding plate on the right side, a fixed detection seat is further arranged in the middle of the top of the test table, and fixed anti-bending detection heads are symmetrically arranged at the front end and the rear end of the right side wall of the fixed detection seat. According to the utility model, the compression strength and the bending strength of the molding sand can be tested synchronously, and the fixture does not need to be switched, so that the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molding sand strength detection, in particular to a molding sand compression and bending strength testing machine. Background Art

[0002] Molding sand is one of the essential materials in the casting process. The strength of molding sand is directly related to the quality of castings, so it is necessary to test the strength of molding sand. However, when testing different mechanical properties of molding sand samples such as bending resistance or compression resistance, it is necessary to disassemble and assemble to switch between different special fixtures and hydraulic cylinders for testing, which makes disassembly and assembly time-consuming and reduces the testing efficiency. Utility Model Content

[0003] The utility model aims to provide a molding sand compression and bending strength testing machine, which can synchronously test the molding sand compression and bending strength without switching fixtures, thereby improving the detection efficiency.

[0004] In order to solve the above technical problems, the utility model provides a molding sand compression and bending strength testing machine, including a test bench, fixed plates are symmetrically provided at the left and right ends of the top of the test bench, hydraulic cylinders are symmetrically provided on the fixed plates, and sliding plates are provided at the driving ends of the hydraulic cylinders. The front and rear ends of the sliding plates are respectively slidably connected to guide rods, a compression detection block is provided on the right side wall of the sliding plate on the left, and a movable bending detection head is provided on the left side wall of the sliding plate on the right. The middle part of the top of the test bench also includes a fixed detection seat, and fixed bending detection heads are symmetrically provided at the front and rear ends of the right side wall of the fixed detection seat.

[0005] Preferably, the sliding plate and the guide rod are slidably connected via a linear bearing.

[0006] Preferably, a plate-type pressure sensor is also provided between the compression resistance detection block and the sliding plate on the left side.

[0007] Preferably, a disc-type pressure sensor is provided between the driving end of the hydraulic cylinder on the right side and the sliding plate on the right side.

[0008] Preferably, the movable anti-bending detection head and the fixed anti-bending detection head are both arranged in a V-shaped serrated plate structure.

[0009] Preferably, it also includes a PLC control panel, the PLC control panel has a display screen, and the PLC control panel is electrically connected to the hydraulic cylinder, the plate pressure sensor and the disc pressure sensor.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] When the utility model performs compression and bending strength tests, firstly, two flat plate-shaped molding sands are placed on the testing table, and one of the molding sands is in contact with the fixed testing seat, and the other molding sand is in contact with the fixed bending testing head. Subsequently, the left and right hydraulic cylinders are controlled to move to drive the sliding plate to move under the guidance of the guide rod, thereby driving the compression testing block to perform compression testing on the molding sand, and driving the movable bending testing head to perform bending testing on the molding sand, so as to achieve the simultaneous compression and bending strength testing of the molding sand without switching the clamps, thereby improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural front view of the utility model.

[0013] Figure 2 It is a top view of the structure of the utility model.

[0014] In the figure: 1-test bench, 2-fixed plate, 3-hydraulic cylinder, 4-sliding plate, 5-guide rod, 6-compression test block, 7-movable bending test head, 8-fixed test seat, 9-fixed bending test head, 10-plate pressure sensor, 11-disc pressure sensor, 12-PLC control panel. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0016] like Figure 1-2 As shown, the utility model specifically discloses a molding sand compression and bending strength testing machine, including a test bench 1, wherein fixed plates 2 are symmetrically provided at the left and right ends of the top of the test bench 1, hydraulic cylinders 3 are symmetrically provided on the fixed plates 2, and sliding plates 4 are provided at the driving ends of the hydraulic cylinders 3, and the front and rear ends of the sliding plates 4 are respectively slidably connected to the guide rods 5, a compression detection block 6 is provided on the right side wall of the left sliding plate 4, and a movable bending detection head 7 is provided on the left side wall of the right sliding plate 4, and a fixed detection seat 8 is also provided in the middle of the top of the test bench 1, and fixed bending detection heads 9 are symmetrically provided at the front and rear ends of the right side wall of the fixed detection seat 8. When performing compression and bending strength tests, first place two flat plate-shaped molding sands on the testing table, with one piece of molding sand abutting against the fixed testing seat 8, and the other piece of molding sand abutting against the fixed bending test head 9. Then, the left and right hydraulic cylinders 3 are controlled to move to drive the sliding plate 4 to move under the guidance of the guide rod 5, thereby driving the compression test block 6 to perform compression test on the molding sand, and driving the movable bending test head 7 to perform bending test on the molding sand, so as to achieve the simultaneous compression and bending strength tests of the molding sand without switching the fixture, thereby improving the testing efficiency.

[0017] The sliding plate 4 and the guide rod 5 are slidably connected via a linear bearing, which can improve the smoothness of the sliding of the sliding plate 4.

[0018] A plate-type pressure sensor 10 is also provided between the compression detection block 6 and the left sliding plate 4. A disc-type pressure sensor 11 is also provided between the driving end of the right hydraulic cylinder 3 and the right sliding plate 4. By providing the above-mentioned pressure sensors, the pressure during compression and bending tests can be sensed and detected.

[0019] The movable anti-bending test head 7 and the fixed anti-bending test head 9 are both arranged in a V-shaped sawtooth plate structure, which is convenient for anti-bending strength testing.

[0020] It also includes a PLC control panel 12, which has a display screen, and the PLC control panel 12 is electrically connected to the hydraulic cylinder 3, the plate pressure sensor 10 and the disc pressure sensor 11; it is convenient to display the pressure data detected by the above-mentioned pressure sensors on the display screen in real time, which is convenient for observation and recording.

[0021] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A molding sand compression and bending strength testing machine, comprising a test bench (1), characterized in that: The top of the test bench (1) is symmetrically provided with fixed plates (2), the fixed plates (2) are symmetrically provided with hydraulic cylinders (3), the driving end of the hydraulic cylinder (3) is provided with a sliding plate (4), the front and rear ends of the sliding plate (4) are respectively slidably connected to the guide rod (5), the right side wall of the left sliding plate (4) is provided with a compression detection block (6), the left side wall of the right sliding plate (4) is provided with a movable anti-bending detection head (7), the top middle part of the test bench (1) also includes a fixed detection seat (8), and the front and rear ends of the right side wall of the fixed detection seat (8) are symmetrically provided with fixed anti-bending detection heads (9).

2. A molding sand compression and bending strength testing machine as claimed in claim 1, characterized in that: The sliding plate (4) and the guide rod (5) are slidably connected via a linear bearing.

3. A molding sand compression and bending strength testing machine as claimed in claim 1, characterized in that: A plate-type pressure sensor (10) is also provided between the anti-pressure detection block (6) and the sliding plate (4) on the left side.

4. A molding sand compression and bending strength testing machine as claimed in claim 3, characterized in that: A disc-type pressure sensor (11) is also provided between the driving end of the hydraulic cylinder (3) on the right side and the sliding plate (4) on the right side.

5. A molding sand compression and bending strength testing machine as claimed in claim 1, characterized in that: The movable anti-bending detection head (7) and the fixed anti-bending detection head (9) are both arranged in a V-shaped sawtooth plate-like structure.

6. A molding sand compression and bending strength testing machine as claimed in claim 4, characterized in that: It also includes a PLC control panel (12), the PLC control panel (12) having a display screen, and the PLC control panel (12) is electrically connected to the hydraulic cylinder (3), the plate-type pressure sensor (10) and the disc-type pressure sensor (11).

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