Static pressure type hardness machine

Abstract

The utility model discloses a static pressure type hardness tester, which belongs to the technical field of grinding wheel detection devices and is characterized by comprising a rack, a lifting frame, a balancing weight, a slide rail and a detection head, the detection head is installed on the lifting frame, the lifting frame is installed on the sliding rail, the sliding rail is vertically arranged, the lifting frame can move up and down along the sliding rail, and the balancing weight is installed on the lifting frame; a plurality of balancing weights are arranged; the balancing weight is cylindrical, and a vertical hole is formed in the middle of the cylindrical balancing weight; a vertical shaft is arranged on the lifting frame, and the vertical shaft penetrates through the vertical holes of the balancing weights. Compared with the prior art, the device has the characteristics of accurate detection and adjustable pressure.

Description

Technical Field

[0001] The utility model relates to a grinding wheel detection device, in particular to a static pressure hardness tester. Background Art

[0002] Ordinary grinding wheels are composed of abrasives and binders. Hardness is an important parameter when selecting and using grinding wheels. If the hardness of the grinding wheel is harder than the workpiece, it will lead to poor self-sharpening performance, reduced grinding efficiency, reduced grinding quality, and even burns to the workpiece; if the hardness of the grinding wheel is softer than the workpiece, the grinding wheel will be consumed quickly, affecting the processing accuracy.

[0003] At present, the grinding wheel sandblasting hardness machine is a commonly used grinding wheel hardness testing device. The grinding wheel sandblasting hardness machine uses compressed air with a certain pressure to spray a certain volume of quartz sand onto the surface of the grinding wheel, making a small pit on the grinding wheel to be tested. The depth of the small pit is used to measure the hardness of the grinding wheel to be tested. The small pit is shallow for high hardness and deep for low hardness. It can test whether the hardness of the grinding wheel sample meets the standard. However, this sandblasting detection method has a large error. Utility Model Content

[0004] The technical task of the utility model is to provide a static pressure hardness tester in view of the deficiencies of the above prior art.

[0005] The technical solution of the utility model to solve its technical problem is: a static pressure hardness tester, characterized in that: it includes a frame, a lifting frame, a counterweight, a slide rail and a detection head; the detection head is installed on the lifting frame, the lifting frame is installed on the slide rail, the slide rail is vertically arranged, the lifting frame can move up and down along the slide rail, and the counterweight is installed on the lifting frame; there are multiple counterweights; the counterweight is cylindrical, and a vertical hole is provided in the middle of the cylinder; the lifting frame is provided with a vertical axis, the vertical axis passes through the vertical holes of each counterweight, and a positioning device is provided between the counterweight and the vertical axis, through the action of the positioning device, the counterweight can only move axially along the vertical axis but cannot rotate around the vertical axis; two or more protrusions are provided on the edge of the counterweight; each counterweight The positions of the protrusions on the frame are different and staggered with each other; a support frame is provided on the frame, the main part of the support frame is annular, and the vertical axis and the counterweight block pass through the middle of the support frame; the support frame includes a fixed frame and a rotating frame, the fixed frame is installed on the frame, the rotating frame is installed on the fixed frame, and the rotating frame can rotate on the fixed frame; the rotating frame is driven by a rotating motor; a plurality of support blocks are provided on the inner side of the rotating frame, the number of the support blocks is the same as the number of protrusions on each counterweight block, and the position of the support block corresponds to the position of the protrusion on one of the counterweight blocks; when the lifting frame falls downward, the protrusion on the counterweight block corresponding to the position of the rotating frame will fall on the support block, and the counterweight block and the counterweight block above it are supported by the action of the support block and the protrusion.

[0006] The lifting frame is driven by a lifting motor; a rope roller is arranged on the output shaft of the lifting motor, and the rope roller is connected to the lifting frame by a rope.

[0007] The lifting motor is provided with a No. 1 rope roller, on which a No. 1 rope is provided, and two ends of the No. 1 rope are respectively wound around the No. 1 rope roller and the No. 2 rope roller, and the lifting motor can drive the No. 2 rope roller to rotate through the No. 1 rope; the No. 2 rope roller and the No. 3 rope roller are fixed on the same rotating shaft; the No. 2 rope is wound around the No. 3 rope roller, and the other end of the No. 2 rope is fixed on the lifting frame, and the No. 3 rope roller pulls the lifting frame through the No. 2 rope; wherein the diameter of the No. 2 rope roller is greater than the diameter of the No. 3 rope roller.

[0008] A pulley is arranged on the upper part of the frame, and the No. 2 rope passes around the pulley in the middle.

[0009] The above-mentioned positioning device includes a groove on the vertical hole and teeth on the vertical shaft. A groove is provided at the edge of the vertical hole of the counterweight block, and teeth are provided on the vertical shaft that are adapted to the groove and run along the vertical direction. The teeth are stuck in the groove to fix the angle of the counterweight block so that it cannot rotate.

[0010] The number of protrusions on the above-mentioned counterweight block is three.

[0011] Compared with the prior art, the utility model has the following outstanding beneficial effects:

[0012] 1. Due to the stable pressure, the detection accuracy is higher than that of the sandblasting hardness machine;

[0013] 2. The detection pressure can be easily adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the lifting frame and its auxiliary structures in the utility model.

[0016] Figure 3 It is a schematic diagram of the lifting mechanism in the utility model.

[0017] Figure 4 It is a schematic diagram of the counterweight block and the vertical shaft structure of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figures 1 to 4 As shown, the utility model includes a frame 10, a lifting frame 7, a counterweight block 3, a slide rail 15, and a detection head 8.

[0020] The detection head 8 is installed on the lifting frame 7, and the detection head 8 presses a small pit on the grinding wheel 9 by pressure, so that the hardness of the grinding wheel 9 can be detected. The lifting frame 7 is installed on the slide rail 15, and the slide rail 15 is vertically arranged, so that the lifting frame 7 can move up and down along the slide rail 15. The counterweight block 3 is installed on the lifting frame 7, and the weight of the lifting frame 7 is increased by the counterweight block 3, so that the total weight of the lifting frame 7 reaches the force required for detection, and the total gravity is applied to the grinding wheel 9 through the detection head 8.

[0021] like Figure 3As shown, the lifting frame 7 is driven by a lifting motor 11. A rope roller is provided on the output shaft of the lifting motor 11, and the rope roller is connected to the lifting frame 7 by a rope, and the lifting frame 7 is lifted by the rope. Specifically, the lifting motor 11 is provided with a No. 1 rope roller 22, and a No. 1 rope 12 is provided on the No. 1 rope roller 22. The two ends of the No. 1 rope 12 are respectively wound around the No. 1 rope roller 22 and the No. 2 rope roller 14, so that the No. 2 rope roller 14 can be driven to rotate by the action of the lifting motor 11. The No. 2 rope roller 14 and the No. 3 rope roller 17 are fixed on the same rotating shaft, so that the No. 2 rope roller 14 can drive the No. 3 rope roller 17 to rotate. The No. 2 rope 1 is wound around the No. 3 rope roller 17, and the other end of the No. 2 rope 1 is fixed on the lifting frame 7. The No. 3 rope roller 17 pulls the lifting frame 7 through the No. 2 rope 1. The diameter of the second rope roller 14 is larger than that of the third rope roller 17, so that the second rope 1 generates a greater pulling force than the first rope 12, so that the lifting frame 7 can be easily pulled up. A pulley 18 is provided on the upper part of the frame 10, and the second rope 1 passes around the pulley 18 in the middle, so that the rope roller can be installed at a lower position.

[0022] There are multiple counterweight blocks 3, and the total weight of the lifting frame 7 can be adjusted by increasing or decreasing the number of counterweight blocks 3, thereby adjusting the pressure of the detection head 8 on the grinding wheel 9, so as to adapt to different detection requirements. Figure 4 As shown, the counterweight 3 is cylindrical, and a vertical hole 19 is provided in the middle of the cylinder. A vertical shaft 2 is provided on the lifting frame 7, and the vertical shaft 2 passes through the vertical holes 19 of each counterweight 3. A positioning device is provided between the counterweight 3 and the vertical shaft 2, and the positioning device enables the counterweight to only move axially along the vertical shaft 2 and cannot rotate around the vertical shaft 2. Specifically, the positioning device includes a groove 20 on the vertical hole 19 and a tooth 21 on the vertical shaft 2. The groove 20 is provided at the edge of the vertical hole 19 of the counterweight, and the vertical shaft 2 is provided with a tooth 21 that is adapted to the groove 20 and runs in a vertical direction. The tooth 21 is stuck in the groove 20 so that the angle of the counterweight 3 is fixed so that it cannot rotate.

[0023] The counterweight 3 is provided with two or more protrusions 4 on its edge, and the number of protrusions 4 is preferably three. The protrusions 4 on each counterweight 3 are located at different positions and are staggered with each other. A support frame is provided on the frame 10, and the main part of the support frame is an annular structure, and the vertical axis 2 and the counterweight 3 pass through the middle of the support frame. The support frame includes a fixed frame 6 and a rotating frame 5, the fixed frame 6 is installed on the frame 10, and the rotating frame 5 is installed on the fixed frame 6, and the rotating frame 5 can rotate on the fixed frame 6. The rotating frame 5 is driven by a rotating motor 13, and the rotating motor 13 drives the rotating frame 5 to rotate through a gear structure, a sprocket chain or a synchronous belt. As Figure 2As shown, a plurality of support blocks 16 are disposed on the inner side of the rotating frame 5 , and the number and position of the support blocks 16 are adapted to the protrusions 4 , where the adaptation means that the number is the same and the position corresponds to one of the counterweight blocks 3 .

[0024] When the lifting frame 7 falls downward, the protrusion 4 on the counterweight 3 corresponding to the position of the rotating frame 5 will fall on the support block 16, and the counterweight 3 and the counterweight 3 above it will be supported by the support block 16 and the protrusion 4, and their gravity will no longer be applied to the lifting frame 7, thereby reducing the total gravity of the lifting frame 7. By rotating the position of the rotating frame 5, the support block 16 will correspond to the protrusion 4 of other counterweights 3, so that the number of the supported counterweights 3 can be changed, that is, the weight of the lifting frame 7 is adjusted, so that the pressure of the detection head 8 on the grinding wheel 9 can be changed.

[0025] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A static pressure hardness tester, characterized in that: It includes a frame, a lifting frame, a counterweight, a slide rail and a detection head; the detection head is installed on the lifting frame, the lifting frame is installed on the slide rail, the slide rail is vertically arranged, the lifting frame can move up and down along the slide rail, and the counterweight is installed on the lifting frame; there are multiple counterweights; the counterweight is cylindrical, and a vertical hole is provided in the middle of the cylinder; the lifting frame is provided with a vertical axis, and the vertical axis passes through the vertical holes of each counterweight, and a positioning device is provided between the counterweight and the vertical axis, through the action of the positioning device, the counterweight can only move axially along the vertical axis but cannot rotate around the vertical axis; two or more protrusions are provided on the edge of the counterweight; the protrusions on each counterweight are located at different positions and staggered with each other ; A support frame is provided on the frame, the main part of the support frame is an annular structure, and the vertical axis and the counterweight block pass through the middle of the support frame; the support frame includes a fixed frame and a rotating frame, the fixed frame is installed on the frame, the rotating frame is installed on the fixed frame, and the rotating frame can rotate on the fixed frame; the rotating frame is driven by a rotating motor; a plurality of support blocks are provided on the inner side of the rotating frame, the number of the support blocks is the same as the number of protrusions on each counterweight block, and the position of the support block corresponds to the position of the protrusion on one of the counterweight blocks; when the lifting frame falls downward, the protrusion on the counterweight block corresponding to the position of the rotating frame will fall on the support block, and the counterweight block and the counterweight block above it are supported by the action of the support block and the protrusion.

2. The static pressure hardness tester according to claim 1, characterized in that: The lifting frame is driven by a lifting motor; a rope roller is arranged on the output shaft of the lifting motor, and the rope roller is connected to the lifting frame by a rope.

3. The static pressure hardness tester according to claim 2, characterized in that: The lifting motor is provided with a No. 1 rope roller, on which a No. 1 rope is provided, and two ends of the No. 1 rope are respectively wound around the No. 1 rope roller and the No. 2 rope roller, and the lifting motor can drive the No. 2 rope roller to rotate through the No. 1 rope; the No. 2 rope roller and the No. 3 rope roller are fixed on the same rotating shaft; the No. 2 rope is wound around the No. 3 rope roller, and the other end of the No. 2 rope is fixed on the lifting frame, and the No. 3 rope roller pulls the lifting frame through the No. 2 rope; wherein the diameter of the No. 2 rope roller is greater than the diameter of the No. 3 rope roller.

4. The static pressure hardness tester according to claim 3, characterized in that: A pulley is arranged on the upper part of the frame, and the middle of the No. 2 rope passes around the pulley.

5. The static pressure hardness tester according to claim 1, characterized in that: The positioning device includes a groove on the vertical hole and teeth on the vertical shaft. A groove is provided at the edge of the vertical hole of the counterweight block, and teeth are provided on the vertical shaft that are adapted to the groove and run in the vertical direction. The teeth are stuck in the groove to fix the angle of the counterweight block so that it cannot rotate.

6. The static pressure hardness tester according to claim 1, characterized in that: The number of protrusions on the counterweight block is three.

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