Device for testing residual recess

Abstract

The utility model discloses a device for testing residual recesses, which comprises a frame, a weight loading rod, a test loading rod, a lifting mechanism, a dial indicator, a weight tray and a measuring plate, a test plane is arranged at the lower part of the frame, the weight loading rod is vertically and slidably arranged at the upper part of the frame, the test loading rod is vertically and slidably arranged at the upper middle part of the frame, and the lifting mechanism is arranged on the test loading rod. The test loading rod and the weight loading rod are coaxially aligned, the lower end of the test loading rod is provided with a loading head used for pressing on a sample plate, the weight tray is fixed on the weight loading rod, the lifting mechanism is arranged at the upper part of the rack and is used for driving the weight tray and the weight loading rod to ascend and descend, and the dial indicator is vertically and downwards mounted in the middle of the rack. The measuring plate is horizontally fixed on the test loading rod, and the measuring head of the dial indicator abuts against the upper surface of the measuring plate. The device can assist a tester to more efficiently test the residual recess of the sample plate.

Description

Technical Field

[0001] The utility model relates to the field of residual concavity testing, in particular to a device for testing residual concavity. Background Art

[0002] The general principle of the residual sag test is to load a specified load onto the specimen, remove the load after a specified static loading time, and measure the change in sag of the specimen before loading and after recovery.

[0003] The existing testing process is: before each test, the initial thickness of the product needs to be measured with a thickness gauge, and then the product is fixed under the pressure head, and the load is added manually, and the test time is recorded separately with a stopwatch. After the test time is reached, the load is removed manually, and the thickness of the test point is measured with a thickness gauge to obtain the thickness value after the load is applied, and the depression value is obtained by subtracting the two thicknesses.

[0004] In the above test process, each test is completely dependent on manual work, which is inefficient and wastes manpower. In addition, the test process cannot obtain data on the continuous change of the thickness of the sample over time during the loading process, and cannot provide a data basis for further evaluation. Utility Model Content

[0005] The utility model aims to provide a device for testing residual depression, which can assist a tester to test the residual depression of a sample more efficiently.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A device for testing residual depression, characterized in that it includes a frame, a weight loading rod, a test loading rod, a lifting mechanism, a dial indicator, a weight tray and a measuring plate, a test plane is provided at the lower part of the frame, the weight loading rod is vertically slidably arranged at the upper part of the frame, the test loading rod is vertically slidably arranged at the middle part of the frame, the test loading rod and the weight loading rod are coaxially aligned, a loading head for pressing on a sample is provided at the lower end of the test loading rod, the weight tray is fixed on the weight loading rod, the lifting mechanism is arranged at the upper part of the frame, the lifting mechanism is used to drive the weight tray to rise and fall together with the weight loading rod, the dial indicator is vertically installed downward in the middle part of the frame, the measuring plate is horizontally fixed on the test loading rod, and the measuring head of the dial indicator is against the top of the measuring plate.

[0008] Furthermore, a top plate, a middle plate and a bottom plate are respectively arranged at the upper, middle and lower positions of the frame, the weight loading rod and the lifting mechanism are arranged on the top plate, the test loading rod and the dial indicator are arranged on the middle plate, and the top of the bottom plate is the test plane.

[0009] Furthermore, the weight tray is horizontally located above the top plate, and a cushion block is fixedly provided on the top plate at a position directly opposite to the weight tray.

[0010] Furthermore, the lifting mechanism comprises an electric push rod which is vertically mounted upward on the top plate, and the upper end of the movable rod of the electric push rod acts on the bottom of the weight tray.

[0011] Furthermore, the cushion block is a polyurethane rubber block.

[0012] Furthermore, a first sliding sleeve is vertically provided in the middle of the top plate, and the weight loading rod is fitted and passed through the first sliding sleeve. A second sliding sleeve is vertically provided in the middle of the middle plate, and the test loading rod is slidably fitted and passed through the second sliding sleeve.

[0013] Furthermore, pillars are respectively provided on both sides of the frame, and upper and lower ends of the pillars are respectively fixedly connected to the top plate and the bottom plate, and mounting sleeves are respectively provided on both sides of the middle plate, and the mounting sleeves are sleeved on the pillars.

[0014] Furthermore, the device for testing the residual depression also includes a timer.

[0015] Furthermore, the device for testing residual depression also includes an electric control box, a timer is arranged in the electric control box, and a control end of the lifting mechanism and a signal output end of the dial indicator are respectively connected to electric wires of the electric control box.

[0016] Furthermore, the device for testing residual depression also includes a protective pad, which is used to be placed between the weight tray and the top plate when the weight tray is lifted up.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model can place a set number of weights on the weight tray as a load. During the test, the weight tray and the weights are lowered and raised by the lifting mechanism to load and unload the load, without the need for manual frequent movement of the load, and the test efficiency is higher. During the test, the thickness change data at the test point of the sample can be recorded by the dial indicator, thereby providing a data basis for further evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of a device for testing residual depression according to Embodiment 1 of the present utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of the residual depression testing device of the first embodiment of the utility model when the weight tray together with the weight and the weight loading rod are lifted upward and the sample is placed on the testing plane;

[0021] Figure 3 It is a cross-sectional schematic diagram of the device for testing residual depression in the second embodiment of the utility model when the weight tray together with the weight and the weight loading rod are lifted upward and the sample is placed on the test plane.

[0022] Meaning of reference numerals in the figure:

[0023] 1-frame; 1.1-top plate; 1.2-middle plate; 1.3-bottom plate; 1.4-pillar; 1.5-mounting sleeve; 1.6-test plane; 2-electric push rod; 2.1-movable rod; 3-weight tray; 4-weight; 5-first sliding sleeve; 6-dial indicator; 6.1-measuring rod; 6.2-measuring head; 7-weight loading rod; 7.1-first contact plate; 8-second sliding sleeve; 9-test loading rod; 9.1-second contact plate; 10-loading head; 11-measuring plate; 12-electric control box; 13-pad; 14-protective pad; 15-sample. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with embodiments.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Embodiment 1:

[0029] like Figure 1 The device for testing residual depression of the first embodiment is shown, which includes a frame 1, a weight loading rod 7, a test loading rod 9, a lifting mechanism, a dial indicator 6, a weight tray 3 and a measuring plate 11.

[0030] The upper, middle and lower positions of the frame 1 are respectively provided with a top plate 1.1, a middle plate 1.2 and a bottom plate 1.3, and pillars 1.4 are respectively provided on both sides of the frame 1. The upper and lower ends of the pillars 1.4 are respectively fixedly connected to the top plate 1.1 and the bottom plate 1.3, and the frame 1 is supported by the pillars 1.4. The two sides of the middle plate 1.2 are respectively provided with mounting sleeves 1.5, and the mounting sleeves 1.5 are sleeved on the pillars 1.4 through a conventional structure. The relative position between the mounting sleeves 1.5 and the pillars 1.4 can be adjusted, so that the position of the middle plate 1.2 can be adjusted up and down.

[0031] Among them, the top of the bottom plate 1.3 is a horizontal test plane 1.6, and the sample 15 to be tested is placed horizontally on the test plane 1.6 during the test. A first sliding sleeve 5 is vertically provided in the middle of the top plate 1.1, and the first sliding sleeve 5 is fixedly installed by bolts. The weight loading rod 7 fits in the first sliding sleeve 5, and the weight loading rod 7 can slide vertically up and down along the first sliding sleeve 5. The weight tray 3 is horizontally fixed on the weight loading rod 7 and is located above the top plate 1.1. The weight tray 3 of this embodiment is a disc, which is coaxially arranged with the weight loading rod 7. When in use, the weight 4 is placed on the top of the weight tray 3. The weight 4 can be a circular weight, in which the hole is sleeved on the weight loading rod 7, and the number of weights 4 is adjusted according to the required load weight.

[0032] The lifting mechanism of this embodiment includes an electric push rod 2, which is installed vertically upward under the top plate 1.1. The movable rod 2.1 of the electric push rod 2 passes through the top plate 1.1 upward and is located under the weight tray 3. During testing, the movable rod 2.1 of the electric push rod 2 directly acts vertically under the weight tray 3, thereby directly driving the weight tray 3 and the weight loading rod 7 to rise and fall through the electric push rod 2.

[0033] In this embodiment, cylindrical pads 13 are fixed on both sides of the top plate 1.1 by bolts. The pads 13 are polyurethane rubber blocks and are located directly below the weight tray 3. Figure 1 As shown, when there is no test and the electric push rod 2 is lowered to the lowest point, the weight tray 3 is supported on the cushion block 13.

[0034] A second sliding sleeve 8 is vertically arranged in the middle of the middle plate 1.2, and a test loading rod 9 is slidably fitted in the second sliding sleeve 8, and the test loading rod 9 can slide up and down along the second sliding sleeve 8. The test loading rod 9 and the weight loading rod 7 are coaxially aligned up and down, and a loading head 10 for pressing on the sample 15 is arranged at the lower end of the test loading rod 9.

[0035] The dial gauge 6 is an electronic dial gauge, which is vertically mounted downward on the middle plate 1.2 in the middle of the frame 1, next to the test loading rod 9. The measuring rod 6.1 of the dial gauge 6 is vertically downward, and the lower end of the measuring rod 6.1 is the measuring head 6.2. The measuring plate 11 is horizontally fixed on the test loading rod 9 and is located below the middle plate 1.2. The measuring plate 11 extends laterally to the bottom of the dial gauge 6, and the measuring head 6.2 of the dial gauge 6 abuts against the top of the measuring plate 11. During the test, the lifting and lowering of the test loading rod 9 will drive the lifting and lowering of the measuring plate 11, and the lifting and lowering of the measuring plate 11 will act on the dial gauge 6, so that the thickness change of the sample 15 is measured by the dial gauge 6.

[0036] The residual depression test device of this embodiment further includes an electric control box 12, which is fixedly mounted on the side of the frame 1. A timer is provided in the electric control box, and the control end of the electric push rod 2 and the signal output end of the dial indicator 6 are respectively connected to the electric control box 12 by wires. During the test, the timer is used to record the test time, and the lifting and lowering of the electric push rod 2 is controlled by the electric control box 12, and the electric control box 12 receives the signal output by the dial indicator 6.

[0037] In this embodiment, a first contact plate 7.1 is fixed to the lower end surface of the weight loading rod 7, and a second contact plate 9.1 is fixed to the upper end surface of the test loading rod 9. When the weight loading rod 7 is pressed against the test loading rod 9, the first contact plate 7.1 is in flat contact with the second contact plate 9.1.

[0038] The testing process of the device for testing residual depression in this embodiment is as follows:

[0039] Before the test, a set number of weights 4 are placed on the weight tray 3 as a load. Figure 2As shown, the weight tray 3 together with the weight 4 and the weight loading rod 7 are first lifted upward by the electric push rod 2, and the weight loading rod 7 is separated from the test loading rod 9 up and down. At this time, the test loading rod 9 is naturally pressed on the test plane 1.6, and the dial indicator 6 is set to zero. Then the test loading rod 9 is manually lifted, and the test sample 15 is placed on the test plane 1.6 and below the loading head 10, and then the loading rod 9 is lowered, and the loading head 10 is naturally pressed on the sample 15. At this time, the value measured by the dial indicator 6 is the thickness of the sample 15 before loading. Next, the test can be started. When the test is started, the electric push rod 2 puts down the weight tray 3 together with the weight 4 and the weight loading rod 7, and the lower end of the weight loading rod 7 will be directly against the test loading rod 9, so that the load acts on the sample 15. After the electric push rod 2 is lowered, it is left to stand for a set time. At this time, the load will be statically loaded on the sample 15. In this process, the change in the thickness at the test point of the sample 15 can be recorded by the dial indicator 6. After the load has been static for a set time, the electric push rod 2 starts and lifts the weight tray 3 together with the weight 4 and the weight loading rod 7 upward again. The staff takes out the sample 15, and after it has been static for a set time, the recovered thickness of the test point of the sample 15 is measured.

[0040] Embodiment 2:

[0041] The difference between the residual depression test device of the second embodiment and the first embodiment is that the second embodiment further provides a protection pad 14. The protection pad 14 of this embodiment is cylindrical.

[0042] like Figure 3 As shown, during the test, when the weight tray 3 together with the weight 4 and the weight loading rod 7 are lifted up, before placing the sample 15, the protective pad 14 is placed between the weight tray 3 and the top plate 1.1, which can prevent the weight tray 3 together with the weight 4 and the weight loading rod 7 from accidentally falling down and causing an accident, and can better protect the safety of the staff. Of course, after the preparation is completed, when starting the test, the protective pad 14 needs to be taken out.

[0043] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A device for testing residual depression, characterized in that: It includes a frame, a weight loading rod, a test loading rod, a lifting mechanism, a dial indicator, a weight tray and a measuring plate. The lower part of the frame is provided with a test plane. The weight loading rod is vertically slidably arranged on the upper part of the frame. The test loading rod is vertically slidably arranged in the middle part of the frame. The test loading rod and the weight loading rod are coaxially aligned. The lower end of the test loading rod is provided with a loading head for pressing on the sample. The weight tray is fixed on the weight loading rod. The lifting mechanism is arranged on the upper part of the frame. The lifting mechanism is used to drive the weight tray to rise and fall together with the weight loading rod. The dial indicator is vertically installed downward in the middle part of the frame. The measuring plate is horizontally fixed on the test loading rod. The measuring head of the dial indicator is against the top of the measuring plate.

2. The device for testing residual depression according to claim 1, characterized in that: A top plate, a middle plate and a bottom plate are respectively disposed at the upper, middle and lower positions of the frame; the weight loading rod and the lifting mechanism are disposed on the top plate; the test loading rod and the dial indicator are disposed on the middle plate; and the top of the bottom plate is the test plane.

3. The device for testing residual depression according to claim 2, characterized in that: The weight tray is horizontally located above the top plate, and a cushion block is fixedly provided on the top plate at a position directly facing the weight tray.

4. The device for testing residual depression according to claim 3, characterized in that: The lifting mechanism comprises an electric push rod, which is vertically mounted on the top plate and faces upwards. The upper end of the movable rod of the electric push rod acts on the bottom of the weight tray.

5. The device for testing residual depression according to claim 3, characterized in that: The cushion block is a polyurethane rubber block.

6. The device for testing residual depression according to claim 2, characterized in that: A first sliding sleeve is vertically provided in the middle of the top plate, and the weight loading rod is fitted and passed through the first sliding sleeve. A second sliding sleeve is vertically provided in the middle of the middle plate, and the test loading rod is slidably fitted and passed through the second sliding sleeve.

7. The device for testing residual depression according to claim 2, characterized in that: Pillars are respectively arranged on both sides of the frame, and upper and lower ends of the pillars are respectively fixedly connected to the top plate and the bottom plate, and mounting sleeves are respectively arranged on both sides of the middle plate, and the mounting sleeves are sleeved on the pillars.

8. The device for testing residual depression according to claim 1, characterized in that: The device for testing residual depression also includes a timer.

9. The device for testing residual depression according to claim 8, characterized in that: The device for testing residual depression also includes an electric control box, the timer is arranged in the electric control box, and the control end of the lifting mechanism and the signal output end of the dial indicator are respectively connected to the electric wires of the electric control box.

10. The device for testing residual depression according to claim 3, characterized in that: The residual depression testing device further comprises a protective pad, which is used to be placed between the weight tray and the top plate when the weight tray is lifted up.

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