Angle grinder performance testing apparatus and method

Abstract

The present invention provides an angle grinder performance testing apparatus and method. The apparatus comprises: a tooling support having two support columns arranged opposite one another; a suspension beam positioned between the two support columns, two ends of the suspension beam being slidably connected to the support columns, respectively; a resilient connecting member, one end of the resilient connecting member being connected to the tooling support, and the other end of the resilient connecting member being connected to the suspension beam, and the resilient connecting member being configured for resiliently suspending the suspension beam from the tooling support; a securing component provided on the suspension beam and configured for securing an angle grinder to the suspension beam; and a counterweight block configured for applying a set weight load to the angle grinder. The present application ingeniously designs a suspension apparatus such that a balanced state is achieved between the combined weight of an angle grinder and the suspension apparatus and the upward tension of a resilient connecting member, so as to offset the self-weight of the angle grinder, with force then being applied to the angle grinder by means of a counterweight block, thereby accurately simulating a grinding test involving manually applied force. The apparatus accurately controls the magnitude and angle of applied force, allowing for accurate test results and convenient, safe, and efficient operational use.

Description

Angle grinder performance testing apparatus and method Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to an angle grinder performance testing device and method. Background Technology

[0002] Angle grinders, as multi-functional power tools, play an important role in daily industrial production. Angle grinders mainly consist of a motor, gearbox, handle, grinding wheel, and protective cover. When using them, the operator grips the handle with both hands, applies a certain amount of force, and holds the grinding wheel at a specific angle to the object to be ground. The friction between the grinding wheel and the object completes grinding or polishing operations.

[0003] Angle grinders need to undergo performance testing before leaving the factory. In the current technology, the performance testing of angle grinders is generally carried out by the operator manually operating the angle grinder. The operator holds the angle grinder handle with both hands and uses both hands to control and adjust the force applied to the object to be ground and the angle between the grinding wheel and the object to be ground.

[0004] The existing angle grinder performance testing methods described above have problems such as high risk and being time-consuming and labor-intensive. In addition, because they are operated manually, it is not easy for the operator to accurately control the force applied to the angle grinder and the grinding angle, which can easily lead to large testing errors and affect the accuracy of the final test results. Summary of the Invention

[0005] This application provides an angle grinder performance testing device to solve the technical problems of inaccurate test results, high risk factor, and time-consuming and labor-intensive methods in the prior art for testing angle grinder performance.

[0006] To address the aforementioned problems, in a first aspect, embodiments of this application provide an angle grinder performance testing device, comprising:

[0007] The tooling bracket has two opposing support columns;

[0008] A suspension beam is located between the two supporting columns, and its two ends are slidably connected to each of the supporting columns respectively;

[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, is configured to elastically suspend the suspension beam on the tooling bracket;

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

[0011] The counterweight 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 connector, and both ends of the suspension beam are suspended by an elastic connector, so that the suspension beam is in a horizontal state.

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

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

[0015] Preferably, there are multiple counterweights, and the multiple counterweights are coaxially sleeved on the fixed column on the suspension beam.

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

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

[0018] Preferably, the fixing component includes:

[0019] The front-end fixed bracket includes two oppositely arranged connecting plates. The upper end of the connecting plates is fixedly connected to the mounting cross plate, and the grinding end at the front of the angle grinder is clamped and fixed by the two connecting plates.

[0020] The rear fixed bracket includes 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 limited and fixed by the rectangular frame plate.

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

[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 of the mounting plate, the position of the front-end fixing bracket on the mounting plate is adjustable, and the position of the rear-end fixing bracket on the mounting plate is adjustable.

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

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

[0026] Preferably, the fastener is an electromagnet, and the counterweight is a metal weight. When the electromagnet is energized, the counterweight is attracted to the suspension beam.

[0027] Alternatively, the fastener is a nut that threads with the fixed column, and the counterweight is clamped between the suspension beam and the fastener.

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

[0029] A base on which a workpiece to be ground is fixed, the workpiece being ground being positioned opposite the grinding end of the angle grinder.

[0030] Secondly, embodiments of this application provide a method for testing the performance of an angle grinder, using the aforementioned angle grinder performance testing apparatus, and including the following steps:

[0031] The angle grinder is fixed to the suspension beam by the fixing component, and the grinding angle of the angle grinder is adjusted.

[0032] Under no-load conditions, adjust the height of the suspension beam so that the angle grinder is in near contact with the workpiece to be ground, or just in contact but with no force between them;

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

[0034] The angle grinder performance testing device and method provided in this application ingeniously utilize the principle of two-force balance in mechanics to design a suspension device for the angle grinder. By achieving a balance between the weight of the angle grinder and related suspension device and the upward tension of the elastic connector, the self-weight of the angle grinder is eliminated. Then, the weight of the counterweight applies force to the angle grinder, accurately simulating the grinding test effect of human hand pressing. This device can precisely control the magnitude and angle of the applied force, providing accurate test results. It is convenient, safe, and efficient to operate. Attached Figure Description

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

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

[0037] Figure 2 is a perspective view of the angle grinder performance testing device in an embodiment of this application;

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

[0039] Figure 4 is an enlarged view of part of the structure in Figure 3;

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

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

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

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

[0044] Figure 9 is a schematic diagram of the structure of the rear-end fixed bracket in an embodiment of this application;

[0045] Figure 10 is a partial structural schematic diagram of the elastic connector in an embodiment of this application;

[0046] Figure 11 is a schematic diagram of the support structure in an embodiment of this application.

[0047] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0048] Explanation of reference numerals in the attached drawings: 1. Base; 2. Support bolt; 3. Roller; 4. Support column; 5. Slide rail; 6. Slider; 7. Mounting cross plate; 8. Front fixing bracket; 81. Connecting plate; 82. Cross plate; 9. Mounting plate; 10. Fastening block; 11. Connecting block; 12. Rear fixing bracket; 121. Rectangular frame plate; 13. Positioning hole; 14. Suspension beam; 15. Angle grinding disc; 16. Long slot; 17. Angle grinder; 18. Slot; 19. Grip end; 20. Grinding end; 21. Tooling bracket; 22. Enclosure; 23. Upper hook; 24. Fastening bolt; 25. Elastic connector; 26. Fixing column; 27. Counterweight; 28. Electromagnet; 29. ​​Part to be ground. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0053] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0054] As mentioned in the background section, in existing technologies, angle grinder performance testing mainly involves an operator holding the angle grinder handle and controlling and adjusting the force applied to the object being ground, as well as the angle between the grinding wheel and the object, using both hands. This method of operation is prone to safety hazards and is time-consuming and labor-intensive. Furthermore, due to the manual operation, deviations and inaccuracies in the applied force and angle are easily caused, making it difficult to guarantee the effectiveness of the final experimental results.

[0055] To address the aforementioned issues, one or more embodiments of this application provide an angle grinder performance testing device for testing angle grinders. The angle grinder is mounted on a suspension beam, which is elastically suspended from a tooling bracket using an elastic connector. The elastic connector balances the weight of the suspension beam and the angle grinder itself. During use, a counterweight is placed on the suspension beam. Since the weight of the suspension beam and the angle grinder in the height direction cancels out the elastic force of the elastic connector, the counterweight can directly simulate and reflect the applied force of operating the angle grinder, thereby reducing interference from irrelevant factors and making the test results of the angle grinder more accurate.

[0056] The testing device will be described in detail below with reference to the accompanying drawings.

[0057] As shown in Figures 1 and 2, the angle grinder performance testing device provided in this embodiment includes a tooling bracket 21, a suspension beam 14, an elastic connector 25, and a fixing component.

[0058] The fixture support 21 has two opposing support columns 4, and a suspension beam 14 is horizontally positioned between the two support columns 4. Both ends of the suspension beam 14 are slidably connected to the support columns 4 on the same side. An elastic connector 25 is connected at one end to the fixture support 21 and at the other end to the suspension beam 14. The elastic connector 25 is configured to elastically suspend the suspension beam 14 on the fixture support 21. A fixing component is provided on the suspension beam 14 to fix the angle grinder 17 below the suspension beam 14.

[0059] As can be seen from the above description, the suspension beam 14 and the angle grinder 17 are suspended on the tooling bracket 21 by the elastic connector 25. The weight of the suspension beam 14 and the angle grinder 17 and the upward pulling force of the elastic connector 25 are balanced, and the angle grinder 17 is fixed relatively statically on the suspension beam 14.

[0060] The angle grinder performance testing device provided in this application embodiment also includes a counterweight 27. The counterweight 27 comprises multiple counterweights, each with a weight that can be the same or different, to apply different external forces to the angle grinder 17. Different weights can be achieved using a single counterweight or by stacking multiple counterweights.

[0061] When the angle grinder 17 is tested for performance, firstly, without setting the counterweight 27, the distance between the angle grinder 17 and the workpiece to be ground is adjusted so that the grinding disc of the angle grinder is in close contact with the workpiece; then, the counterweight 27 is installed on the suspension beam 14. At this time, the counterweight 27 can directly reflect the applied force of operating the angle grinder 17. By changing different numbers or different weights of the counterweight 27, different external forces can be simulated and tested on the angle grinder 17, without being affected by the instability of manual clamping, and the test results are more accurate.

[0062] As shown in Figures 1 and 2, in this embodiment, the tooling bracket 21 can be a high-strength rigid metal bracket. The overall structure of the tooling bracket 21 is U-shaped, and the two oppositely arranged support columns 4 are connected by a central crossbeam to form a whole. This arrangement can ensure the stability of the overall structure of the tooling bracket 21. Generally, the bottom of the tooling bracket 21 is also equipped with rollers 3 to facilitate moving the angle grinder 17 to different positions during testing.

[0063] As shown in Figure 3, in some embodiments, each supporting column 4 is connected to an elastic connector 25, and the two ends of the suspension beam 14 are respectively suspended by an elastic connector 25, so that the suspension beam 14 is in a horizontal state.

[0064] Furthermore, in the above embodiment, a slider 6 is provided at each end 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 to the slide rail 5 on the support column 4 through the slider 6. The elastic connector 25 suspends the suspension beam 14 in a horizontal state, so that the angle grinder 17 on the suspension beam is also in a horizontal simulation scene, which facilitates the subsequent adjustment of the angle of the angle grinder 17 and the applied force.

[0065] In addition, the suspension effect of the two elastic connectors 25 can also 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 enabling the angle grinder 17 to maintain good stability in dynamic test scenarios.

[0066] As an alternative implementation, the two ends of the suspension beam 14 are slidably connected to the support columns 4 respectively, and one end of the elastic connector 25 is fixed on the crossbeam between the two support columns 4, and the other end is fixed at the midpoint of the suspension beam 14. That is, the suspension beam 14 is connected by an elastic connector 25.

[0067] As shown in Figures 6 and 10, the elastic connector 25 can be a spring or other components with elastic force, and this embodiment is not absolutely limited to this. Furthermore, the upper end of the elastic connector 25 is also slidably connected to the slide rail 5 via another slider 6. However, a fastening block 10 is fixed to the slider 6 connected to the upper end of the elastic connector 25, and a fastening bolt 24 passes through the fastening block 10. The fastening bolt 24 is threaded and tightened against the slide rail 5, thus fixing the upper end of the elastic connector 25 to the support column 4. This arrangement facilitates adjustment of the height of the elastic connector 25, thereby adapting to elastic connectors 25 with different elastic strengths.

[0068] Furthermore, as shown in Figures 6 and 10, the upper end of the elastic connector 25 is fixed to the fastening block 10 by the upper hook 23; the lower end of the elastic connector 25 can be fixed to the connecting block 11 by the lower hook, and the end of the suspension beam 14 is fixed to the corresponding slider 6 by the connecting block 11.

[0069] As shown in Figure 5, a mounting plate 7 is fixedly connected to the lower end of the suspension beam 14 in the above embodiment, and a fixing component is provided on the mounting plate 7. In use, the angle grinder 17 is suspended below the mounting plate 7 by the fixing component, and the counterweight 27 is installed on the suspension beam 14 and located above the mounting plate 7. The counterweight 27 and the angle grinder 17 are in the same vertical direction.

[0070] The mounting plate 7 can be made of metal, such as iron or steel. With the counterweight 27 and the angle grinder 17 aligned vertically, the load of the counterweight 27 is directly applied to the angle grinder 17, preventing uneven load distribution and test deviations due to positional misalignment. Furthermore, the alignment design of the counterweight 27 and the angle grinder 17 ensures balanced horizontal force on the suspension beam 14, reducing tilting or swaying caused by uneven load distribution.

[0071] Specifically, as shown in Figure 3, there are multiple counterweights 27. The suspension beam 14 is provided with a protruding fixing post 26, and the multiple counterweights 27 are coaxially sleeved on the fixing post 26.

[0072] The aforementioned counterweight 27 can be a round or square metal weight. During the actual testing of the angle grinder 17, by adding or removing different numbers of counterweights 27, the actual grinding force of the angle grinder 17 on the workpiece 29 to be ground changes accordingly. This allows for the construction of simulated test scenarios where the angle grinder 17 applies different forces to the workpiece 29 to be ground, resulting in different degrees of grinding. This is beneficial for enriching test data, and multiple tests can also improve test accuracy.

[0073] Generally, the counterweight 27 is fixed to the suspension beam 14 by fasteners. For example, in some embodiments, the fastener is an electromagnet 28, which is fixed to the suspension beam 14 and attracts the counterweight 27 to the suspension beam 14 when energized. Alternatively, the fastener is a nut that threads with the fixing post 26, in which case the counterweight 27 is clamped between the suspension beam 14 and the nut.

[0074] In the above embodiments, the fixed column 26 and the suspension beam 14 can be fixedly connected by welding or by threaded connection. When the counterweight 27 is a metal weight, the metal weight generally has a through hole in the middle, and the counterweight 27 can be directly sleeved on the fixed column 26. After the electromagnet 28 is energized, the metal weight is attracted to the suspension beam 14 by the magnetic field, thereby enabling quick loading and unloading. By adjusting the current intensity of the electromagnet 28, the magnitude of the attraction force can be controlled to ensure that the counterweight 27 is firmly fixed and to prevent the counterweight 27 from loosening or falling off during the test. Here, the electromagnet 28 adopts the relevant components that generate magnetic attraction force when energized in the prior art, which will not be described in detail in this application.

[0075] Similarly, the counterweight 27 is clamped between the suspension beam 14 and the fastener by the threaded engagement of the nut and the fixing post 26, ensuring that the counterweight 27 is firmly fixed and not easily loosened. The threaded engagement of the nut and the fixing post 26 is inexpensive and easy to maintain and replace.

[0076] It should be noted that, preferably, the fixed column 26 is located in the middle of the suspension beam 14, and the counterweight 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.

[0077] As shown in Figures 8 and 9, in some embodiments of this application, the fixing component includes a front fixing bracket 8 and a rear fixing bracket 12.

[0078] The front-end fixed bracket 8 includes two oppositely arranged connecting plates 81. The upper ends of the connecting plates 81 are fixedly connected to or integrally formed with the two sides of the horizontal plate 82. The horizontal plate 82 is provided with screw holes and is fixed to the mounting horizontal plate 7 by screws. The grinding end 20 at the front of the angle grinder 17 is clamped and fixed by the two connecting plates 81.

[0079] The rear fixed bracket 12 includes 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 limited and constrained by the rectangular frame plate 121. The rectangular frame plate 121 is provided with a positioning hole 13. The angle grinder 17 inside is secured by bolts passing through the positioning hole 13.

[0080] In the above embodiments, the angle grinder 17 generally includes a motor, gearbox, handle, grinding wheel and protective cover. The grinding end 20 at the front of the angle grinder 17 refers to the grinding disc 15 used to grind the workpiece 29, the protective cover of the head and other related components. The gripping end 19 at the rear of the angle grinder 17 refers to the part held by the operator, including the handle, motor and so on.

[0081] As shown in Figures 7, 8, and 9, the height of the grinding end 20 at the front of the angle grinder 17 on the connecting plate 81 is adjustable. Specifically, the connecting plate 81 has a slot 18 formed along the height direction. By changing the height position of the front of the angle grinder 17 within the slot 18, the height of the front of the angle grinder 17 can be adjusted. After the front of the angle grinder 17 is adjusted to the set height, a bolt passes through the slot 18 and abuts against the front of the angle grinder 17, thus fixing the front of the angle grinder 17. In this way, the height of the front of the angle grinder 17 is adjustable, while the height of the rear of the angle grinder 17 within the rear end fixing bracket 12 remains fixed, enabling adjustment of the grinding angle of the angle grinder 17.

[0082] Furthermore, by setting scale markings 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 elaborated further in this embodiment.

[0083] In some embodiments, along the length of the mounting plate 7, the position of the front fixing bracket 8 on the mounting plate 7 is adjustable, and the position of the rear fixing bracket 12 on the mounting plate 7 is also adjustable.

[0084] Specifically, as shown in Figure 5, the mounting plate 7 has two sets of elongated holes 16 spaced apart along its length. Each set of elongated holes 16 includes two elongated holes arranged opposite each other along the width of the mounting plate 7. The front-end fixing bracket 8 is fixed to one set of elongated holes 16 by bolts, and the mounting plate 9 of the rear-end fixing bracket 12 is fixed to the other set of elongated holes 16 by bolts. By loosening the bolts to change the position of the connecting plate 8 in the elongated holes 16, the position of the front-end fixing bracket 8 on the mounting plate 7 can be adjusted. By loosening the bolts to change the position of the mounting plate 9 in the other elongated hole 16, the position of the rear-end fixing bracket 12 on the mounting plate 7 can be adjusted.

[0085] Correspondingly, the position of the fixing column 26 on the mounting plate 7 is also adjustable. For example, the fixing column 26 is a bolt, and a slotted hole is opened in the middle of the suspension beam 14. The position of the fixing column 26 in the slotted hole is adjustable. After adjustment, the fixing column 26 is fastened to the suspension beam 14 by a nut.

[0086] With the above settings, the positions of the front fixed bracket 8 and the rear fixed bracket 12 can be changed, which makes it easy to adapt to angle grinders 17 of different specifications and sizes, and improves the versatility of the testing device.

[0087] In some embodiments, as shown in FIG11, the testing device further includes a base 1, which is used to fix the workpiece 29 to be ground. In use, the workpiece 29 to be ground is positioned opposite to the grinding end 20 of the angle grinder 17.

[0088] Generally, the part to be ground 29 is a plate-shaped part, such as a steel plate. The angle grinder 17 is adjusted so that the grinding disc 15 is aligned with the part to be ground 29. By adjusting the weight of the counterweight 27, different forces can be applied to the angle grinder 17 to achieve the test effect.

[0089] Furthermore, as shown in Figure 11, the four feet of the base 1 are also equipped with support bolts 2, which can be rotated to adjust the base 1 to a horizontal state. The upper surface of the base 1 is surrounded by a baffle 22 to prevent the workpiece 29 to be ground from falling off the base 1.

[0090] This application also provides a method for using the above-mentioned angle grinder performance testing device:

[0091] Step S1: Fix the angle grinder 17 to the suspension beam 14 using the fixing components, and adjust the grinding angle of the angle grinder 17;

[0092] Specifically, the operator manually places the holding end 19 of the angle grinder 17 into the rear fixed bracket 12 and the grinding end 20 of the angle grinder 17 into the front fixed bracket 8. The first bolt is passed through the slot 18 and pre-tightened to the grinding end 20 of the angle grinder 17. The second bolt is passed through the positioning hole 13 and pressed against 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, and with the first and second bolts, the angle between the grinding disc 15 of the angle grinder 17 and the workpiece 29 to be ground is adjusted. After adjustment, the first and second bolts are tightened for fixation. Thus, the installation of the angle grinder 17 is completed.

[0093] Step S2: Under no-load conditions, adjust the height of the suspension beam 14 so that the angle grinder 17 is in close contact with the workpiece 29 to be ground, or just in contact but without any force between them.

[0094] Specifically, without setting the counterweight 27, in the unloaded state, adjust the height of the slider 6 connected to the upper end of the elastic connector 25 on the slide rail 5 to adjust the distance between the angle grinder 17 and the workpiece 29 to be ground. At this time, the angle grinding disc 15 of the angle grinder 17 needs to be adjusted to the point that it is almost in contact with the workpiece 29 to be ground (for example, the distance between the two is about one millimeter), or the angle grinding disc 15 and the workpiece 29 to be ground just in contact but there is no force between them.

[0095] Step S3: Add counterweight 27 to suspension beam 14, turn on angle grinder 17, and angle grinding disc 15 will start rotating to grind workpiece 29.

[0096] Specifically, for example, when the power supply to the electromagnet 28 is turned on, the electromagnet 28 generates an attractive force, which firmly holds the counterweight 27 in place, preventing the counterweight 27 from vibrating up and down during testing and affecting the test results. The operator turns on the angle grinder 17, and the grinding disc 15 begins to rotate. The operator can observe and record the grinding test results of the angle grinder 17 from one side.

[0097] After one test, the weight of the counterweight 27 is adjusted to change the grinding force of the angle grinder 15 on the workpiece 29 to be ground, and then the above test operation is repeated. Alternatively, the angle between the angle grinder 15 and the workpiece 29 to be ground is adjusted, and then the above test operation is repeated.

[0098] Alternatively, the grinding position of the grinding disc 15 of the angle grinder 17 on the workpiece 29 can be changed by moving the overall position of the tooling bracket 21, making it easier to adapt to different test conditions.

[0099] In a specific experiment, the angle grinder performance testing device in the embodiments of this application was used to test the angle grinder, and the results were compared with those of the manual handheld angle grinder test. The grinding test time was 3 minutes for both tests, and the workpieces to be ground were steel plates of uniform thickness. The test results are shown in the table below.

[0100] Wherein, load refers to the weight applied to the angle grinder; grinding weight in this application refers to the weight of debris ground off when using the angle grinder performance testing device in the embodiments of this application; manual grinding weight refers to the weight of debris ground off when manually holding the angle grinder; the error rate calculation formula is: error rate = (grinding weight in this application - manual grinding weight) / grinding weight in this application × 100%.

[0101] The data in the table above shows that when the angle grinder's test load remains constant, the smaller the angle between the angle grinder disc 15 and the workpiece 29, the larger the contact area between them, and therefore, the greater the weight removed during grinding. Conversely, when the angle between the angle grinder disc 15 and the workpiece 29 is constant, the greater the load on the angle grinder 17, the greater the simulated force applied, and therefore, the greater the weight removed during grinding. The table also shows that the error rate can be both positive and negative, reflecting the inherent instability and inaccuracy in manual grinding by hand. This can lead to inconsistent force application, resulting in unstable and inaccurate test results.

[0102] The angle grinder performance testing device and method provided in this application ingeniously utilize the principle of two-force balance in mechanics to design a suspension device for the angle grinder. The weight of the angle grinder and related suspension device is balanced with the upward pulling force of the elastic connector, thus eliminating the angle grinder's own weight. Then, the weight of the counterweight applies force to the angle grinder, accurately simulating the grinding effect of human hand pressure. This device can precisely control the magnitude and angle of the applied force, providing accurate test results. It is convenient, safe, and efficient to operate.

[0103] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0104] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A performance testing device for an angle grinder, characterized in that, include: The tooling bracket (21) has two opposing support columns (4); A suspension beam (14) is located between the two supporting columns (4), and its two ends are slidably connected to each of the supporting columns (4); An elastic connector (25) is connected at one end to the tooling bracket (21) and at the other end to the suspension beam (14). The elastic connector (25) is configured to elastically suspend the suspension beam (14) on the tooling bracket (21). A fixing component is provided on the suspension beam (14) for fixing the angle grinder (17) on the suspension beam (14); The counterweight (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, Two of the supporting columns (4) are each connected to an elastic connector (25), and both ends of the suspension beam (14) are suspended by an elastic connector (25), so that the suspension beam (14) is in a horizontal state; and / or One end of the elastic connector (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 (27); and / or The counterweight (27) is multiple, and the multiple counterweights (27) are coaxially sleeved on the fixed 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 plate (7), and the fixing component is provided on the mounting plate (7); The angle grinder (17) is suspended below the mounting plate (7), and the counterweight (27) is located on the suspension beam (14) and above the mounting plate (7). 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 component includes: The front fixed bracket (8) includes two connecting plates (81) arranged opposite to each other. The upper end of the connecting plate (81) is fixedly connected to the mounting horizontal plate (7). The grinding end (20) at the front of the angle grinder (17) is clamped and fixed by the two connecting plates (81). The rear fixed bracket (12) includes 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 limited and constrained by the rectangular frame plate (121).

6. The angle grinder performance testing device according to claim 5, characterized in that, The height of the grinding end (20) at the front of the angle grinder (17) on the connecting plate (81) is adjustable; The grinding angle of the angle grinder (17) can be 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 of the mounting plate (7), the position of the front fixing bracket (8) on the mounting plate (7) is adjustable, and the position of the rear fixing bracket (12) on the mounting plate (7) is adjustable; and / or Along the length 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 fasteners 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), and the counterweight (27) is a metal weight. When the electromagnet (28) is energized, it attracts the counterweight (27) to the suspension beam (14). Alternatively, the fastener is a nut that is threaded into the fixed post (26), and the counterweight (27) is clamped between the suspension beam (14) and the fastener.

10. A method for testing the performance of an angle grinder, characterized in that, The method using the angle grinder performance testing device as described in any one of claims 1 to 9 comprises the following steps: The angle grinder (17) is fixed to the suspension beam (14) by the fixing component, and the grinding angle of the angle grinder (17) is adjusted. Under no-load conditions, adjust the height of the suspension beam (14) so ​​that the angle grinder (17) is in close contact with the workpiece to be ground, or just in contact but with no force between them; Add the counterweight (27) to the suspension beam (14), start the angle grinder (17), and the grinding disc of the angle grinder (17) begins to rotate to grind the workpiece.

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