Angle grinder performance testing device and method

Abstract

The invention provides an angle grinder performance testing device and method. The device comprises a tool support, wherein the tool support is provided with two oppositely-arranged supporting stand columns; the suspension beam is located between the two supporting stand columns, and the two ends of the suspension beam are slidably connected with the supporting stand columns respectively; one end of the elastic connecting piece is connected with the tool support, the other end of the elastic connecting piece is connected with the suspension beam, and the elastic connecting piece is configured to elastically hang the suspension beam on the tool support; the fixing part is arranged on the suspension beam and is used for fixing the angle grinder on the suspension beam; and the balancing weight is configured to apply a load with a set weight to the angle grinder. According to the angle grinder, the suspension device is ingeniously designed, the gravity of the angle grinder and the suspension device and the upward pulling force of the elastic connecting piece are in a balanced state to eliminate the gravity of the angle grinder, then force is applied to the angle grinder through the balancing weight, and the grinding test of applying force through pressing by a human hand is accurately simulated. The device can accurately control the magnitude and angle of applied force, the test result is accurate, and the device is convenient, safe and efficient to operate and use.

Description

Technical Field

[0001] The present application relates to the technical field of testing equipment, and in particular to a performance testing device and method for an angle grinder. Background Art

[0002] As a multifunctional electric tool, angle grinder plays an important role in daily industrial production. Angle grinder is mainly composed of motor, gear box, handle, grinding wheel and protective cover. When using it, the operator holds the handle of the angle grinder with both hands, applies a certain force with both hands, and makes the grinding wheel and the object to be grinded form a certain angle, and uses the friction between the grinding wheel and the object to be grinded to complete the grinding or polishing operation.

[0003] Angle grinders need to be tested for performance before leaving the factory. In the prior art, the performance test of angle grinders is generally performed by operators manually operating the angle grinders. The operators hold the angle grinder handles with both hands and control and adjust the force applied by the angle grinder to the object to be grinded and the angle between the grinding wheel and the object to be grinded.

[0004] The above existing angle grinder performance test methods have the problems of high risk factor, time-consuming and labor-intensive. In addition, due to the manual operation, during this process, it is not easy for the operator to accurately control the force and grinding angle applied to the angle grinder, which is easy to produce large test errors and affect the accuracy of the final test results. Summary of the invention

[0005] The present application provides an angle grinder performance testing device, which is used to solve the technical problems in the prior art of angle grinder performance testing methods, such as inaccurate test results, high risk factors, and time-consuming and labor-intensive.

[0006] In order to solve the above problems, in a first aspect, an embodiment of the present application provides an angle grinder performance testing device, comprising:

[0007] A tooling support having two supporting columns arranged opposite to each other;

[0008] A suspension beam, located between the two support columns, with two ends slidably connected to each of the support columns;

[0009] An elastic connector, one end of which is connected to the tooling bracket and the other end of which is connected to the suspension beam, wherein the elastic connector is configured to elastically suspend the suspension beam on the tooling bracket;

[0010] A fixing component, provided on the suspension beam, for fixing the angle grinder on the suspension beam;

[0011] The counterweight block is configured to apply a load of a set weight to the angle grinder.

[0012] Preferably, each of the two supporting columns is connected to an elastic connecting member, and both ends of the suspension beam are suspended by an elastic connecting member, respectively, and the suspension beam is in a horizontal state.

[0013] Preferably, one end of the elastic connecting member is connected to the tooling bracket via a height adjustment device.

[0014] Preferably, a protruding fixing column is provided on the suspension beam for positioning and installing the counterweight block.

[0015] Preferably, there are a plurality of counterweight blocks, and the plurality of counterweight blocks are coaxially sleeved on the fixing column on the suspension beam.

[0016] Preferably, the lower end of the suspension beam is fixedly connected to a mounting transverse plate, and the fixing component is arranged on the mounting transverse plate;

[0017] The angle grinder is suspended below the installation horizontal plate, the counterweight block is arranged on the suspension beam and located above the installation horizontal plate, and the counterweight block and the angle grinder are in the same vertical direction.

[0018] Preferably, the fixing component comprises:

[0019] The front fixing bracket comprises two connecting plates arranged opposite to each other, the upper ends of the connecting plates are fixedly connected to the mounting cross plate, and the grinding end of the front part of the angle grinder is clamped and fixed by the two connecting plates;

[0020] The rear end fixing bracket comprises a mounting plate and a rectangular frame plate rotatably connected to the mounting plate, and the gripping end at the rear of the angle grinder is fixed by being limited and constrained by the rectangular frame plate.

[0021] Preferably, the grinding end at the front of the angle grinder is height-adjustable on the connecting plate;

[0022] Preferably, the grinding angle of the angle grinder is adjusted by adjusting the height of the grinding end at the front of the angle grinder.

[0023] Preferably, along the length direction of the mounting transverse plate, the position of the front end fixing bracket on the mounting transverse plate is adjustable, and the position of the rear end fixing bracket on the mounting transverse plate is adjustable.

[0024] Preferably, along the length direction of the suspension beam, the position of the fixing column on the suspension beam is adjustable.

[0025] Preferably, the suspension beam is provided with a fastener for fixing the counterweight.

[0026] Preferably, the fastener is an electromagnet, the counterweight is a metal weight, and the electromagnet adsorbs the counterweight onto the suspension beam when energized;

[0027] Alternatively, the fastener is a nut that is threadably matched with the fixing column, and the counterweight is sandwiched between the suspension beam and the fastener.

[0028] Preferably, the angle grinder performance testing device further comprises:

[0029] A base is provided on which a workpiece to be polished is fixed, and the workpiece to be polished is arranged opposite to the polishing end of the angle grinder.

[0030] In a second aspect, an embodiment of the present application provides a method for testing the performance of an angle grinder, using the above-mentioned angle grinder performance testing device, comprising the following steps:

[0031] Fixing the angle grinder on the suspension beam by means of the fixing component, and adjusting the grinding angle of the angle grinder;

[0032] In a no-load state, the height of the suspension beam is adjusted so that the angle grinder is almost in contact with the workpiece to be grinded, or just in contact with the workpiece but with no force acting between the two;

[0033] The counterweight block is added to the suspension beam, and the angle grinder is started, and the angle grinding disc of the angle grinder starts to rotate to grind the workpiece to be grinded.

[0034] The angle grinder performance test device and method provided in the embodiment of the present application cleverly utilizes the two-force balance principle in mechanics to design a suspension device for the angle grinder, and eliminates the angle grinder's own gravity by bringing the gravity of the angle grinder and the related suspension device into a balanced state with the upward pulling force of the elastic connector, and then applies force to the angle grinder through the deadweight of the counterweight block, accurately achieving a grinding test effect that simulates human hand pressure and force. The device can accurately control the force size and angle, the test results are accurate, and the operation is convenient, safe, and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] Figure 1 This is a front view of the angle grinder performance testing device in the embodiment of the present application;

[0037] Figure 2 A three-dimensional diagram of an angle grinder performance testing device in an embodiment of the present application;

[0038] Figure 3 It is a schematic diagram of the partial structural assembly of the angle grinder and the tooling bracket;

[0039] Figure 4 for Figure 3 A magnified view of the structure in the middle;

[0040] Figure 5 This is a schematic diagram of the assembly of the horizontal plate and the angle grinder in the embodiment of the present application;

[0041] Figure 6 It is a partial structural schematic diagram of the tooling bracket in the embodiment of the present application;

[0042] Figure 7 It is a partial structural schematic diagram of the angle grinder and the suspension beam in the embodiment of the present application;

[0043] Figure 8 This is a schematic diagram of the structure of the front-end fixing bracket in the embodiment of the present application;

[0044] Fig. 9 This is a schematic diagram of the structure of the rear end fixing bracket in the embodiment of the present application;

[0045] Fig.10 This is a partial structural schematic diagram of the elastic connector in the embodiment of the present application;

[0046] Fig.11 It is a schematic diagram of the structure of the support in the embodiment of the present application.

[0047] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0048] Description of Reference Numerals

[0049] 1. Base; 2. Support bolts; 3. Rollers; 4. Support columns; 5. Slide rails; 6. Slide blocks; 7. Mounting cross plate; 8. Front end fixing bracket; 81. Connecting plate; 82. Cross plate; 9. Mounting plate; 10. Fastening block; 11. Connecting block; 12. Rear end fixing bracket; 121. Rectangular frame plate; 13. Positioning holes; 14. Suspension beam; 15. Angle grinding disc; 16. Long strip holes; 17. Angle grinder; 18. Slot holes; 19. Holding end; 20. Grinding end; 21. Tooling bracket; 22. Enclosure; 23. Upper hook; 24. Fastening bolts; 25. Elastic connector; 26. Fixed column; 27. Counterweight; 28. Electromagnet; 29. ​​Parts to be polished. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0053] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein.

[0054] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0055] As mentioned in the background technology, in the prior art, the performance test of angle grinders is mainly performed by operators holding the angle grinder handle and controlling and adjusting the force applied by the angle grinder to the object being grinded and the angle between the grinding wheel and the object being grinded with both hands. This operation method is prone to potential safety hazards, and the testing process is time-consuming and labor-intensive. In addition, due to the manual operation method, it is also easy to cause deviations and inaccuracies in the applied control force and angle, making it difficult to guarantee the effective performance of the final experimental results.

[0056] In order to solve the above problems, one or more embodiments of the present application provide an angle grinder performance testing device for testing the angle grinder, wherein the angle grinder is installed on a suspension beam, and the suspension beam is elastically suspended on a tooling bracket by means of an elastic connector, and the elastic connector can balance the self-gravity of the suspension beam and the angle grinder; when in use, a counterweight block is arranged on the suspension beam, and since the gravity of the suspension beam and the angle grinder in the height direction is offset by the elastic force of the elastic connector, the counterweight block can directly simulate and reflect the applied force of operating the angle grinder, thereby reducing the interference of irrelevant factors and making the test results of the angle grinder more accurate.

[0057] The testing device is described in detail below with reference to the accompanying drawings.

[0058] like Figure 1 and Figure 2 As shown, the angle grinder performance testing device provided in the embodiment of the present application includes a tooling bracket 21, a suspension beam 14, an elastic connecting member 25 and a fixing component.

[0059] The tool support 21 has two supporting columns 4 arranged opposite to each other, the suspension beam 14 is horizontally arranged between the two supporting columns 4, and the two ends of the suspension beam 14 are respectively connected to the supporting columns 4 on the same side so as to be slidable up and down. One end of the elastic connector 25 is connected to the tool support 21, and the other end is connected to the suspension beam 14. The elastic connector 25 is configured to elastically suspend the suspension beam 14 on the tool support 21. The fixing component is arranged on the suspension beam 14, and is used to fix the angle grinder 17 below the suspension beam 14.

[0060] From the above description, it can be seen that the suspension beam 14 and the angle grinder 17 are suspended on the tooling bracket 21 by the elastic connecting piece 25, the self-gravity of the suspension beam 14 and the angle grinder 17 and the upward pulling force of the elastic connecting piece 25 are balanced, and the angle grinder 17 is fixed on the suspension beam 14 relatively statically.

[0061] The angle grinder performance test device provided in the embodiment of the present application further includes a counterweight block 27, which includes multiple counterweight blocks, each of which may have the same weight or different weights, so as to apply external forces of different weights to the angle grinder 17. Different weights may be achieved by one counterweight block or by stacking multiple counterweight blocks.

[0062] When the angle grinder 17 is subjected to a performance test, first, the counterweight 27 is not set, and the distance between the angle grinder 17 and the workpiece to be grinded is adjusted so that the angle grinding disc of the angle grinder is almost in contact with the workpiece to be grinded; then, the counterweight 27 is installed on the suspension beam 14. At this time, the counterweight 27 can directly reflect the applied force of the operating angle grinder 17. By changing the counterweights 27 of different numbers or weights, the angle grinder 17 can be simulated and tested under different external forces without being disturbed by the instability of manual clamping, and the test results are more accurate.

[0063] like Figure 1 , 2 As shown, in the embodiment of the present application, the tooling bracket 21 can be a high-strength rigid metal bracket, and the overall structure of the tooling bracket 21 is in the shape of a gate, and the two supporting columns 4 arranged opposite to each other are connected to form a whole through the middle crossbeam. This arrangement can ensure the stability of the overall structure of the tooling bracket 21. Generally, a roller 3 is also installed at the bottom of the tooling bracket 21 to drive the angle grinder 17 to move to different positions during testing.

[0064] like Figure 3 As shown, in some embodiments, each supporting column 4 is connected to an elastic connecting member 25, and both ends of the suspension beam 14 are suspended by an elastic connecting member 25, so that the suspension beam 14 is in a horizontal state.

[0065] Furthermore, in the above embodiment, a slider 6 is respectively provided at both ends of the suspension beam 14, and a slide rail 5 extending along its own height direction is provided on the support column 4. The end of the suspension beam 14 is slidably connected with the slide rail 5 on the support column 4 through the slider 6. The elastic connecting member 25 suspends the suspension beam 14 in a horizontal state, which can make the angle grinder 17 on the suspension beam also in a horizontal simulation scene, thereby facilitating the subsequent adjustment of the angle of the angle grinder 17 and the applied force.

[0066] In addition, the hanging effect of the two elastic connectors 25 can ensure that the load of the suspension beam 14 is evenly distributed at both ends, further absorbing and buffering the external vibration and impact of the angle grinder 17 during the grinding process, reducing the impact of external vibration and impact on the test results, and allowing the angle grinder 17 to maintain good stability in dynamic test scenarios.

[0067] As a replaceable embodiment, the two ends of the suspension beam 14 are respectively slidably connected to the supporting columns 4, one end of the elastic connecting member 25 is fixed on the cross beam between the two supporting columns 4, and the other end is fixed to the midpoint of the suspension beam 14, that is, the suspension beam 14 is connected via an elastic connecting member 25.

[0068] like Figure 6 and Fig.10As shown, the elastic connector 25 can be a spring or other components with elastic force, and this is not absolutely limited in the embodiments of the present application. In addition, the upper end of the elastic connector 25 is also slidably connected to the slide rail 5 through another slider 6, but a fastening block 10 is fixed on the slider 6 connected to the upper end of the elastic connector 25, and a fastening bolt 24 is passed through the fastening block 10. The fastening bolt 24 is threaded and tightened against the slide rail 5, so that the upper end of the elastic connector 25 is fixed to the support column 4. This setting can facilitate the adjustment of the height of the elastic connector 25, so as to adapt to the elastic connector 25 with different elastic strengths.

[0069] In addition, if Figure 6 , 10 As shown, the upper end of the elastic connector 25 is fixed to the fastening block 10 via the upper hook 23 ; the lower end of the elastic connector 25 can be fixed to the connecting block 11 via the lower hook, and the end of the suspension beam 14 is fixed to the corresponding slider 6 via the connecting block 11 .

[0070] like Figure 5 As shown, the lower end of the suspension beam 14 in the above embodiment is fixedly connected to a mounting horizontal plate 7, and the fixing component is arranged on the mounting horizontal plate 7. When in use, the angle grinder 17 is suspended below the mounting horizontal plate 7 through the fixing component, and the counterweight 27 is installed on the suspension beam 14 and located above the mounting horizontal plate 7, and the counterweight 27 and the angle grinder 17 are in the same vertical direction.

[0071] The installation cross plate 7 can be made of a metal plate, such as an iron plate or a steel plate. The counterweight block 27 and the angle grinder 17 are in the same vertical direction, which can ensure that the load of the counterweight block 27 acts directly on the angle grinder 17, avoiding the problem of uneven load and test deviation caused by position deviation. In addition, the alignment design of the counterweight block 27 and the angle grinder 17 makes the suspension beam 14 balanced in the horizontal direction, reducing the tilt or shaking caused by uneven load.

[0072] Specifically, Figure 3 As shown, there are a plurality of counterweight blocks 27. A protruding fixing column 26 is provided on the suspension beam 14, and a plurality of counterweight blocks 27 are coaxially sleeved on the fixing column 26.

[0073] The above-mentioned counterweight block 27 can be a round or square metal weight. During the actual testing process of the angle grinder 17, by adding or subtracting different numbers of counterweight blocks 27, the actual grinding force of the angle grinder 17 on the workpiece 29 to be grinded changes accordingly, thereby constructing a simulated test scenario in which the angle grinder 17 applies different forces to the workpiece 29 to form different grinding degrees, which is conducive to enriching the test data. Multiple tests can also improve the test accuracy.

[0074] Generally, the counterweight 27 is fixed to the suspension beam 14 by a fastener. For example, in some embodiments, the fastener is an electromagnet 28, which is fixed to the suspension beam 14. When the electromagnet 28 is energized, the counterweight 27 is adsorbed on the suspension beam 14. Alternatively, the fastener is a nut threadedly matched with the fixing column 26, in which case the counterweight 27 is sandwiched between the suspension beam 14 and the nut.

[0075] In the above embodiment, the fixed column 26 and the suspension beam 14 can be connected by welding or threaded connection. When the counterweight 27 adopts a metal weight, the middle part of the metal weight generally has a through hole, and the counterweight 27 can be directly sleeved on the fixed column 26. After the electromagnet 28 is energized, the metal weight is adsorbed on the suspension beam 14 by the magnetic field, so that fast loading and unloading can be achieved. By adjusting the current intensity of the electromagnet 28, the size of the adsorption force can be controlled to ensure that the counterweight 27 is firmly fixed and prevent the counterweight 27 from loosening or falling during the test. Here, the electromagnet 28 adopts the relevant components of the prior art that are energized to generate magnetic adsorption force, and this application will not be repeated.

[0076] Similarly, the counterweight 27 is sandwiched between the suspension beam 14 and the fastener by the threaded fit of the nut and the fixing column 26, ensuring that the counterweight 27 is firmly fixed and not easy to loosen. The threaded fit of the nut and the fixing column 26 is low in cost and easy to maintain and replace.

[0077] It should be noted that, preferably, the fixing column 26 is located in the middle of the suspension beam 14, and the counterweight block 27 is fixed in the middle of the suspension beam 14, which can ensure that the suspension beam 14 is subjected to balanced force and avoid tilting or imbalance caused by the shift of the center of gravity.

[0078] like Figure 8 , 9 As shown, in some embodiments of the present application, the fixing component includes a front fixing bracket 8 and a rear fixing bracket 12 .

[0079] The front end fixing bracket 8 includes two relatively arranged connecting plates 81, the upper ends of the connecting plates 81 are respectively fixedly connected to the two sides of the cross plate 82 or formed in one piece, the cross plate 82 is provided with screw holes and is fixed to the mounting cross plate 7 by screws, and the grinding end 20 at the front of the angle grinder 17 is clamped and fixed by the two connecting plates 81.

[0080] The rear end fixing bracket 12 includes a mounting plate 9 and a rectangular frame plate 121 rotatably connected to the mounting plate 9. The holding end 19 at the rear of the angle grinder 17 is limited and fixed by the rectangular frame plate 121. A positioning hole 13 is provided on the rectangular frame plate 121. The bolts passing through the positioning hole 13 are used to tighten the internal angle grinder 17, thereby fixing the holding end 19 of the angle grinder 17.

[0081] In the above embodiment, the angle grinder 17 generally includes a motor, a gear box, a handle, a grinding wheel, a protective cover and other parts. The grinding end 20 at the front of the angle grinder 17 refers to the angle grinding disc 15 used for grinding the workpiece 29 to be grinded, the protective cover on the head and other related parts. The holding end 19 at the rear of the angle grinder 17 refers to the part held by the operator, including the handle, the motor and the like.

[0082] like Figure 7 , 8 As shown in , 9, the height of the grinding end 20 of the front of the angle grinder 17 on the connecting plate 81 is adjustable. Specifically, a slot 18 arranged along the height direction is formed on the connecting plate 81, and the height adjustment of the front of the angle grinder 17 is achieved by changing the height position of the front of the angle grinder 17 in the slot 18. When the front of the angle grinder 17 is adjusted to the set height, the bolt passes through the slot 18 and is pressed against the front of the angle grinder 17 to fix the front of the angle grinder 17. In this way, the height of the front of the angle grinder 17 is adjustable, and the height of the rear of the angle grinder 17 in the rear end fixing bracket 12 remains fixed, so that the grinding angle of the angle grinder 17 can be adjusted.

[0083] Furthermore, by setting scale marks or other methods on the connecting plate 8, it is convenient for operators to observe and adjust the grinding angle of the angle grinder 17, which will not be described in detail in the embodiments of the present application.

[0084] In some embodiments, along the length direction of the mounting transverse plate 7, the position of the front end fixing bracket 8 on the mounting transverse plate 7 is adjustable, and the position of the rear end fixing bracket 12 on the mounting transverse plate 7 is also adjustable.

[0085] Specifically, Figure 5 As shown, two groups of long holes 16 are arranged on the mounting cross plate 7 at intervals along its length direction, and each group of long holes 16 includes two long holes arranged opposite to each other along the width direction of the mounting cross plate 7; the front end fixing bracket 8 is fixed to one group of long holes 16 by bolts, and the mounting plate 9 of the rear end fixing bracket 12 is fixed to the other group of long holes 16 by bolts; the position of the connecting plate 8 in the long holes 16 is changed by loosening the bolts, so as to realize the position adjustment of the front end fixing bracket 8 on the mounting cross plate 7; the position of the mounting plate 9 in the other long hole 16 is changed by loosening the bolts, so as to realize the position adjustment of the rear end fixing bracket 12 on the mounting cross plate 7.

[0086] Correspondingly, the position of the fixing column 26 on the mounting cross plate 7 can also be adjusted. Exemplarily, the fixing column 26 is a bolt, and a strip hole is opened in the middle of the suspension beam 14. The position of the fixing column 26 in the strip hole is adjustable. After adjustment, the fixing column 26 is fastened to the suspension beam 14 by a nut.

[0087] Through the above arrangement, the positions of the front fixing bracket 8 and the rear fixing bracket 12 can be changed, so as to facilitate adaptation to angle grinders 17 of different specifications and sizes, thereby improving the versatility of the testing device.

[0088] In some embodiments, Fig.11 As shown, the testing device further comprises a base 1 , which is used to fix a workpiece 29 to be polished. When in use, the workpiece 29 to be polished is arranged opposite to the polishing end 20 of the angle grinder 17 .

[0089] Generally, the workpiece 29 to be polished is a plate-shaped workpiece, such as a steel plate. The angle grinder 17 is adjusted so that the angle grinding disc 15 is aligned with the workpiece 29 to be polished, and the weight of the counterweight 27 is adjusted to achieve a test effect of applying different forces to the angle grinder 17 .

[0090] Furthermore, if Fig.11 As shown, the four legs of the base 1 are also provided with foot bolts 2, and the base 1 is adjusted to be in a horizontal state by rotating the foot bolts 2. A fence 22 is constructed around the upper end surface of the base 1 to prevent the workpiece 29 to be polished from leaving the base 1.

[0091] The present application also provides a method for using the above-mentioned angle grinder performance testing device:

[0092] Step S1: fixing the angle grinder 17 on the suspension beam 14 by means of a fixing component, and adjusting the grinding angle of the angle grinder 17;

[0093] Specifically, the operator manually places the holding end 19 of the angle grinder 17 into the rear end fixing bracket 12, and places the grinding end 20 of the angle grinder 17 into the front end fixing bracket 8; uses a first bolt to pass through the slot 18 and pre-tighten the grinding end 20 of the angle grinder 17, and uses a second bolt to pass through the positioning hole 13 and reach the holding end 19 of the angle grinder 17; by adjusting the height of the connection between the grinding end 20 of the angle grinder 17 and the slot 18, cooperate with the first bolt and the second bolt, adjust the angle between the angle grinding plate 15 of the angle grinder 17 and the workpiece to be grinded 29, and after adjustment, tighten the first bolt and the second bolt to fix it. At this point, the installation of the angle grinder 17 is completed.

[0094] Step S2: In a no-load state, the height of the suspension beam 14 is adjusted so that the angle grinder 17 is almost in contact with the workpiece 29 to be grinded, or just in contact with the workpiece 29 but with no acting force between them.

[0095] Specifically, first, the counterweight 27 is not set. In the no-load state, the height of the slider 6 connected to the upper end of the elastic connecting member 25 on the slide rail 5 is adjusted to adjust the distance between the angle grinder 17 and the workpiece 29 to be grinded. At this time, the angle grinding plate 15 of the angle grinder 17 needs to be adjusted to a degree of almost contact with the workpiece 29 to be grinded (for example, the distance between the two is about one millimeter), or the angle grinding plate 15 and the workpiece 29 to be grinded just touch each other but there is no force between the two.

[0096] Step S3: Add a counterweight 27 to the suspension beam 14 , turn on the switch button of the angle grinder 17 , and the angle grinding disc 15 starts to rotate to grind the workpiece 29 to be grinded.

[0097] Specifically, for example, the electromagnet 28 is powered on, and the electromagnet 28 generates suction force to tightly absorb the counterweight 27 to prevent the counterweight 27 from vibrating up and down during the test, which may affect the test results. The operator turns on the switch button of the angle grinder 17, and the angle grinding disc 15 starts to rotate. The operator can observe and record the grinding test of the angle grinder 17 on one side.

[0098] After one test is completed, the grinding force of the angle grinding disc 15 on the workpiece 29 to be polished is changed by adjusting the weight of the counterweight block 27, and then the above test operation is repeated. Alternatively, the angle between the angle grinding disc 15 and the workpiece 29 to be polished is adjusted, and then the above test operation is repeated.

[0099] In addition, the grinding position of the angle grinding disc 15 of the angle grinder 17 on the workpiece 29 to be grinded can also be changed by moving the overall position of the tooling bracket 21, so as to adapt to different test conditions.

[0100] In a specific experiment, the angle grinder was tested using the angle grinder performance testing device in the embodiment of the present application, and the results were compared with the grinding test results of a manual handheld angle grinder. The grinding test time was 3 minutes, and the workpieces to be grinded were all steel plates with uniform thickness. The test results are shown in the following table.

[0101]

[0102]

[0103] Among them, load refers to the weight added to the angle grinder; the load of this application is realized by a counterweight block; the manual grinding load is achieved by the operator standing on the scale and applying force to the angle grinder with his hands, and the difference between the weight displayed on the scale and the operator's weight is the load weight (for example: for an operator weighing 50kg, when the scale shows 47kg, it means that a load of 3kg is applied to the angle grinder. During the actual test, the weight displayed on the scale has been shaking up and down because human power cannot apply force accurately and stably); the grinding weight of this application refers to the weight of the debris ground off when using the angle grinder performance test device in the embodiment of this application; the manual grinding weight refers to the weight of the debris ground off when manually holding the angle grinder for grinding; the error rate calculation formula is: Error rate = (grinding weight of this application-manual grinding weight) / grinding weight of this application × 100%.

[0104] It can be seen from the data in the above table that when the test load of the angle grinder is constant, the smaller the angle between the angle grinder disc 15 and the workpiece 29 to be polished, the larger the contact surface between the two, and therefore, the greater the weight removed by polishing. When the angle between the angle grinder disc 15 and the workpiece 29 to be polished is constant, the greater the load of the angle grinder 17, the greater the simulated force applied, and therefore, the greater the weight removed by polishing. At the same time, it can also be seen from the above table that the error rate is both positive and negative, which also reflects that when manually clamping and polishing by hand, it is very easy to have unstable clamping and unable to accurately grasp the force applied by both hands on the angle grinder. It is easy to have a large force applied at one moment and a small force applied at another moment, resulting in the final test result being unstable and inaccurate.

[0105] The angle grinder performance test device and method provided in the embodiment of the present application cleverly utilizes the two-force balance principle in mechanics to design a suspension device for the angle grinder, and achieves a balanced state through the gravity of the angle grinder and the related suspension device and the upward pulling force of the elastic connecting piece, thereby eliminating the angle grinder's own gravity, and then applies force to the angle grinder through the deadweight of the counterweight block, accurately achieving the grinding test effect of simulating human hand pressure. The device can accurately control the force size and angle, the test results are accurate, and the operation is convenient, safe, and efficient.

[0106] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0107] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. An angle grinder performance testing device, characterized in that: include: A tooling support (21) having two supporting columns (4) arranged opposite to each other; A suspension beam (14) is located between the two supporting columns (4), and its two ends are slidably connected to each supporting column (4); an elastic connecting member (25), one end of which is connected to the tooling bracket (21) and the other end of which is connected to the suspension beam (14), wherein the elastic connecting member (25) is configured to elastically suspend the suspension beam (14) on the tooling bracket (21); A fixing component, arranged on the suspension beam (14), and used for fixing the angle grinder (17) on the suspension beam (14); The counterweight block (27) is configured to apply a load of a set weight to the angle grinder (17).

2. The angle grinder performance testing device according to claim 1, characterized in that: The two supporting columns (4) are respectively connected to an elastic connecting member (25), and both ends of the suspension beam (14) are respectively suspended by an elastic connecting member (25), and the suspension beam (14) is in a horizontal state; and / or One end of the elastic connecting piece (25) is connected to the tooling bracket (21) via a height adjustment device.

3. The angle grinder performance testing device according to claim 1, characterized in that: The suspension beam (14) is provided with a protruding fixing column (26) for positioning and installing the counterweight block (27); and / or There are a plurality of counterweight blocks (27), and the plurality of counterweight blocks (27) are coaxially sleeved on the fixing column (26) on the suspension beam (14).

4. The angle grinder performance testing device according to claim 3, characterized in that: The lower end of the suspension beam (14) is fixedly connected to a mounting transverse plate (7), and the fixing component is arranged on the mounting transverse plate (7); The angle grinder (17) is suspended below the mounting transverse plate (7), the counterweight (27) is arranged on the suspension beam (14) and is located above the mounting transverse plate (7), and the counterweight (27) and the angle grinder (17) are in the same vertical direction.

5. The angle grinder performance testing device according to claim 4, characterized in that: The fixing member comprises: The front fixed bracket (8) comprises two connecting plates (81) arranged opposite to each other, the upper ends of the connecting plates (81) are fixedly connected to the mounting cross plate (7), and the grinding end (20) at the front of the angle grinder (17) is clamped and fixed by the two connecting plates (81); The rear end fixing bracket (12) comprises a mounting plate (9) and a rectangular frame plate (121) rotatably connected to the mounting plate (9); the gripping end (19) at the rear of the angle grinder (17) is fixed by being limited and constrained by the rectangular frame plate (121).

6. The angle grinder performance testing device according to claim 5, characterized in that: The grinding end (20) at the front of the angle grinder (17) is height-adjustable on the connecting plate (81); The grinding angle of the angle grinder (17) is adjusted by adjusting the height of the grinding end (20) at the front of the angle grinder (17).

7. The angle grinder performance testing device according to claim 5, characterized in that: Along the length direction of the mounting transverse plate (7), the position of the front end fixing bracket (8) on the mounting transverse plate (7) is adjustable, and the position of the rear end fixing bracket (12) on the mounting transverse plate (7) is adjustable; and / or Along the length direction of the suspension beam (14), the position of the fixing column (26) on the suspension beam (14) is adjustable.

8. The angle grinder performance testing device according to claim 4, characterized in that: The suspension beam (14) is provided with a fastener for fixing the counterweight (27).

9. The angle grinder performance testing device according to claim 8, characterized in that: The fastener is an electromagnet (28), the counterweight (27) is a metal weight, and the electromagnet (28) adsorbs the counterweight (27) onto the suspension beam (14) when energized; Alternatively, the fastener is a nut threadably matched with the fixing column (26), and the counterweight (27) is sandwiched between the suspension beam (14) and the fastener.

10. A method for testing the performance of an angle grinder, characterized in that: Using the angle grinder performance testing device according to any one of claims 1 to 9, the method steps include: The angle grinder (17) is fixed to the suspension beam (14) by means of the fixing component, and the grinding angle of the angle grinder (17) is adjusted; In a no-load state, the height of the suspension beam (14) is adjusted so that the angle grinder (17) is nearly in contact with the workpiece to be grinded, or just in contact with the workpiece but without any force acting therebetween; The counterweight block (27) is added to the suspension beam (14), and the angle grinder (17) is started, and the angle grinding disc of the angle grinder (17) starts to rotate to grind the workpiece to be grinded.

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