A fixture for a car angle grinder body, an installation and use method of the fixture, and a method for measuring the center distance dimension of the angle grinder body

Abstract

The present invention discloses a fixture for a corner grinder body, an installation and use method of the fixture, and a method for measuring the center distance dimension of the corner grinder body, relating to the technical field of corner grinder bodies. A fixture for a corner grinder body includes a chassis, and a bracket is perpendicularly arranged on one end surface of the chassis. A turntable is installed above the bracket, and the turntable is rotationally connected to the bracket through a threaded shaft. The outer end of the threaded shaft passes through a through hole on the bracket and is connected with a nut. A fixture body is fixedly connected to the top surface of the turntable, and a cavity for placing the corner grinder body is formed on the fixture body. The present invention can conveniently adjust the angular position of the fixture body by rotating the turntable. When machining the internal structure at the E-end plane or the internal structure at the F-end plane of the corner grinder body, the switching between the two is convenient, the operation is simple and time-saving. When the corresponding surface E1 or the corresponding surface F1 on the fixture body is parallel to the end surface of the chassis, the positioning pin can just be inserted into the pin hole to fix the position of the turntable.

Description

Technical Field

[0001] The present invention relates to the technical field of angle grinder bodies, and particularly to a fixture for turning an angle grinder body, an installation and use method of the fixture, and a method for measuring the center distance dimension of the angle grinder body. Background Technique

[0002] A pneumatic angle grinder, also known as a pneumatic grinding machine or a disc grinding machine, is a portable pneumatic tool used for grinding, rust removal, fiberglass cutting, marble grinding, etc. of steel structural parts. The angle grinder body is the main component of the angle grinder. Among them, ensuring the accuracy requirements of the dimensions (center distance dimension and center line included angle) for installing a pair of spiral bevel gears is the key to ensuring the performance and quality of the angle grinder. Before processing the angle grinder body, it needs to be fixed with a fixture. Therefore, the fixture is an essential tooling in the processing of the angle grinder body. After processing the angle grinder body, it is necessary to measure the two center distance dimensions of the angle grinder body to determine whether the dimension accuracy of the angle grinder body meets the quality requirements.

[0003] However, the existing fixture cannot be directly switched to the other end after processing the structure at one end of the angle grinder body. Instead, secondary clamping is used to process the structure at the other end. In this way, it cannot be guaranteed that the two center lines intersect in the same plane, the included angle error between the two center lines is relatively large, and the two center distance dimensions cannot be controlled by direct measurement. It is easy to cause deviation in the dimensions of the processed angle grinder body, error in the intersection of the two center lines, increase the amount of defective parts, and the processing efficiency is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a fixture for turning an angle grinder body, an installation and use method of the fixture, and a method for measuring the center distance dimension of the angle grinder body, so as to solve the problems mentioned in the above background technique that the existing fixture cannot be directly switched to the other end after processing one end of the angle grinder body, and it is not easy to ensure the processing accuracy after switching, which is easy to cause deviation in the dimensions of the processed angle grinder body, increase the amount of defective parts, and consume time and effort; it is also inconvenient to control and measure the two center distances of the processed angle grinder body.

[0005] To achieve the above object, the present invention provides the following technical solutions: A fixture for a car angle grinder body, an installation and use method of the fixture, and a method for measuring the center distance dimension of the angle grinder body, including a chassis, a bracket is vertically arranged on the end surface of the chassis, a turntable is installed above the bracket, and the turntable is rotationally connected to the bracket through a threaded shaft. The outer end of the threaded shaft passes through a through hole on the bracket and is connected with a nut. A clamping body is fixedly connected to the top surface of the turntable. A cavity for placing the angle grinder body is formed on the clamping body. A pressing plate is arranged on the clamping body and is matched with the clamping body to press the angle grinder body. The clamping body has two end faces, namely corresponding face E1 and corresponding face F1, and both the corresponding face E1 and the corresponding face F1 are planes.

[0006] A pin sleeve is arranged on the bracket parallel to the threaded shaft, and a positioning pin and a spring adapted to the pin sleeve are installed in the pin sleeve. A plurality of pin holes for indexing and positioning are arranged in the bottom surface of the turntable to cooperate with the positioning pin.

[0007] Preferably, the angle grinder body has two end faces, namely the E-end plane and the F-end plane. The E-end plane is parallel to its corresponding face E1 on the clamping body, and the F-end plane is also parallel to its corresponding face F1 on the clamping body.

[0008] Preferably, the range of the angle that the turntable can rotate is 0 - 180°.

[0009] Preferably, a handle is connected to the outer end of the positioning pin.

[0010] Preferably, a cylindrical pin for limiting is arranged on the positioning pin, and the cylindrical pin is perpendicular to the positioning pin. A sliding groove for the cylindrical pin to pass through and slide is arranged on the pin sleeve.

[0011] Preferably, the pressing plate and the clamping body form a detachable structure through bolts, and two bolts are symmetrically arranged on the clamping body. Slot holes matching the bolts are arranged on the pressing plate.

[0012] An installation and use method of a fixture for a car angle grinder body includes the following steps:

[0013] (A1) First, horizontally place the chassis on the workbench, then make the bracket perpendicular to the chassis and fit with it, and fix the two with bolts.

[0014] (B1) Fix the clamping body on the top surface of the turntable by welding or other fixing methods to make the clamping body and the turntable a fixed integrated structure.

[0015] (C1) Place the combination of the clamping body and the turntable on the bracket. The threaded shaft on the bottom surface of the turntable passes through the through hole on the bracket. Screw the nut clockwise on the threaded shaft, and tighten the nut to fix the combination of the clamping body and the turntable to the bracket.

[0016] (D1) Place the angle grinder body to be machined on a lathe in the cavity. Remove the pressure plate and cover it on the angle grinder body. Push the pressure plate until the slot hole on it engages with the bolt, and then turn the bolt clockwise to lock the pressure plate. After locking, the pressure plate cooperates with the fixture body to fix the angle grinder body.

[0017] (E1) When machining the internal structure at the E end face of the angle grinder body, slightly loosen the nut, pull down the positioning pin, and turn the handle. Through the cylindrical pin and the pin sleeve, disengage the positioning pin from the pin hole of the turntable and position it. Rotate the turntable until the corresponding face E1 of the fixture body is parallel to the end face of the chassis. At this time, turn the handle to drive the cylindrical pin to slide into the chute of the pin sleeve, and push the positioning pin through the spring so that the positioning pin engages with the corresponding pin hole on the turntable. Use the positioning pin to fix the angular position of the turntable at this time, tighten the nut, and machine the internal structure at the E end plane of the angle grinder body.

[0018] (F1) When machining the internal structure at the F end plane of the grinder body, operate in the same way as (E1).

[0019] (G1) During turning, to ensure the dimensional accuracy of the center distance, first machine the E end plane (or F end plane) of the angle grinder body, control the distance dimension M (or N) from the E end plane (or F end plane) to the corresponding face E1 (or corresponding face F1), and ensure the dimension from the E end plane (or F end plane) to the center of rotation, so as to ensure the center distance dimension of the angle grinder body.

[0020] Preferably, the angle grinder body is only clamped once on the fixture body. After transposition, when tightening the nut, it is necessary to ensure that there is no gap between the turntable and the bracket, and ensure that the two center lines of the angle grinder body intersect in the same plane after machining.

[0021] A method for measuring the center distance dimension of an angle grinder body, comprising the following steps:

[0022] (A2) After all the parts of the angle grinder body to be machined are machined, remove the angle grinder body from the tooling. When measuring the two center distance dimensions during quality inspection, proceed as follows:

[0023] (B2) When measuring the center distance dimension inside the E-end plane of the angle grinder body, first hold the cylinder at the outer end of the E-cone gauge by hand, insert the E-cone gauge into the inner hole of the F-end plane until it is fully inserted, ensuring that the inner end face of the E-cone gauge is in close contact with the step inside the inner hole of the F-end plane of the angle grinder body; then insert the E-cylinder gauge into the inner hole of the E-end plane, ensuring that the inner end face of the E-cylinder gauge is in close contact with the step inside the inner hole of the E-end plane of the angle grinder body; finally, use the measuring instrument to extend through the through hole at the center of the E-cylinder gauge into the inner hole of the E-end plane; measure the distance from the outer end face of the E-cylinder gauge to the conical surface of the E-cone gauge.

[0024] (C2) When measuring the center distance dimension inside the F-end plane of the angle grinder body, first hold the cylinder at the outer end of the F-cone gauge by hand, insert the F-cone gauge into the inner hole of the E-end plane until it is fully inserted, ensuring that the inner end face of the F-cone gauge is in close contact with the step inside the inner hole of the E-end plane of the angle grinder body; then insert the F-cylinder gauge into the inner hole of the F-end plane, ensuring that the inner end face of the F-cylinder gauge is in close contact with the step inside the inner hole of the F-end plane of the angle grinder body; finally, use the measuring instrument to extend through the through hole at the center of the F-cylinder gauge into the inner hole of the F-end plane; measure the distance from the outer end face of the F-cylinder gauge to the conical surface of the F-cone gauge.

[0025] Compared with the prior art, the beneficial effects of the manufacturing method of the present invention are:

[0026] The present invention facilitates the adjustment of the angular position of the fixture by rotating the turntable. When machining the internal structure at the E-end plane or the internal structure at the F-end plane of the angle grinder body, the switching between the two is convenient, and the operation is simple and time-saving; when the corresponding surface E1 or the corresponding surface F1 on the fixture is parallel to the end face of the chassis, the positioning pin can just be inserted into the pin hole to fix the position of the turntable, saving the manual alignment time and avoiding the slight rotation of the turntable during the process of fixing the turntable with nuts, which may cause deviation in the alignment of the corresponding surface E1 or the corresponding surface F1 with the machining surface, ensuring the accuracy of the included angle between the two center lines after machining; moreover, the angle grinder body is only clamped once on the fixture, and after transposition, tightening the nut makes the turntable and the bracket in non-gap contact, ensuring that the two center lines after machining intersect in the same plane, improving the machining accuracy of the angle grinder body and reducing the number of defective parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic front view structure diagram of the whole of the present invention;

[0028] Figure 2 It is a schematic right view structure diagram of the whole of the present invention;

[0029] Figure 3 It is a schematic top view structure diagram of a certain machining state of an embodiment of the present invention;

[0030] Figure 4 This is a schematic top view of another processing state of the embodiment of the present invention;

[0031] Figure 5 This is a schematic enlarged top view of the fixture body of the present invention;

[0032] Figure 6 This is a schematic diagram for measuring the internal center distance at the E - end plane of the present invention;

[0033] Figure 7 This is a schematic diagram for measuring the internal center distance at the F - end plane of the present invention.

[0034] In the figure: 1, chassis; 2, bracket; 3, turntable; 4, threaded shaft; 41, nut; 5, fixture body; 51, pressing plate; 511, bolt; 512, corresponding surface E1; 513, corresponding surface F1; 52, cavity; 6, angle grinder body; 61, E - end plane; 62, F - end plane; 7, pin sleeve; 71, positioning pin; 711, handle; 712, spring; 8, cylindrical pin; 91, E - cylindrical gauge; 911, E - conical gauge; 92, F - cylindrical gauge; 921, F - conical gauge. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0036] Please refer to Figures 1 to 7 , an embodiment provided by the present invention: A fixture for a corner grinder body, including a chassis 1, a bracket 2 perpendicular to the end surface of the chassis 1 is provided, a turntable 3 is installed above the bracket 2, and the turntable 3 is rotationally connected to the bracket 2 through a threaded shaft 4. The outer end of the threaded shaft 4 passes through a through - hole on the bracket 2 and is connected with a nut 41. A fixture body 5 is fixedly connected to the top surface of the turntable 3. A cavity 52 for placing the angle grinder body 6 is provided on the fixture body 5. A pressing plate 51 that matches the fixture body 5 to press the angle grinder body 6 is provided on the fixture body 5. The fixture body 5 has two end surfaces, namely the corresponding surface E1 512 and the corresponding surface F1 513. The corresponding surface E1 512 and the corresponding surface F1 513 are both planes, and are respectively used as measurement reference surfaces when processing the E - end plane 61 or the F - end plane 62 of the angle grinder body 6;

[0037] A pin sleeve 7 is provided on the bracket 2 and is parallel to the threaded shaft 4. A positioning pin 71 and a spring 712 that are adapted to the pin sleeve 7 are installed inside the pin sleeve 7, which is convenient for the user to automatically insert the positioning pin 71. A plurality of pin holes for indexing and positioning are provided inside the bottom surface of the turntable 3 to cooperate with the positioning pin 71.

[0038] Specifically, the angle grinder body 6 has two end faces, namely the E-end plane 61 and the F-end plane 62. The E-end plane 61 is parallel to its corresponding face E1512 on the fixture body 5, and the F-end plane 62 is also parallel to its corresponding face F1513 on the fixture body 5. Before machining the E-end plane 61 or the F-end plane 62, it is convenient to refer to and judge whether the end face of the chassis 1 is flush with the corresponding face E1512 or the corresponding face F1513 of the fixture body 5, so as to determine the alignment of the machined E-end plane 61 or F-end plane 62.

[0039] Specifically, the rotatable angle range of the turntable 3 is 0 - 180°, which is convenient for the rotation of the turntable 3 and the fixture body 5, so that the switching of machining the E-end plane 61 or the F-end plane 62 is simple and convenient, time-saving and labor-saving. By rotating the turntable 3, it is convenient to adjust the angular position of the fixture body 5. When machining the internal structure at the E-end plane 61 or the F-end plane 62 of the angle grinder body 6, the switching between the two is convenient, and the operation is simple and time-saving; when the corresponding face E1512 or the corresponding face F1513 on the fixture body 5 is parallel to the end face of the chassis 1, the positioning pin 71 can just be inserted into the pin hole to fix the position of the turntable 3, saving the manual alignment time and avoiding the slight rotation of the turntable 3 during the process of fixing the turntable 3 with the nut 41, which may cause deviation in the alignment of the corresponding face E1512 or the corresponding face F1513 with the machining surface, and ensuring the accuracy of the included angle between the two center lines after machining.

[0040] Specifically, a handle 711 is connected to the outer end of the positioning pin 71. The contact surface of the handle 711 is relatively large, which is convenient for the user to push and pull the positioning pin 71.

[0041] Specifically, a cylindrical pin 8 for limiting is arranged on the positioning pin 71, and the cylindrical pin 8 is perpendicular to the positioning pin 71. A sliding groove for the cylindrical pin 8 to pass through is arranged on the pin sleeve 7. The cylindrical pin 8 can move in the sliding groove on the pin sleeve 7. The cylindrical pin 8 can better fix the positioning pin 71, control the movement and the moving distance of the positioning pin 71, and play a better limiting role.

[0042] Specifically, the pressing plate 51 forms a detachable structure with the fixture body 5 through bolts 511, and two bolts 511 are symmetrically arranged on the fixture body 5. Slot holes matching the bolts 511 are arranged on the pressing plate 51, which is convenient for the installation and disassembly of the pressing plate 51, so as to facilitate the placement and removal of the angle grinder body 6. The structure is simple and easy to use.

[0043] An installation and use method of a fixture for a vehicle angle grinder body includes the following steps:

[0044] (A1) First, horizontally place the chassis 1 on the workbench, then the bracket 2 is perpendicular to the chassis 1 and fits with it, and the two are fixed with bolts.

[0045] (B1) Fix the fixture body 5 on the top surface of the turntable 3 by welding or other fixing means, so that the fixture body 5 and the turntable 3 are fixed into an integral structure;

[0046] (C1) Place the combination of the fixture body 5 and the turntable 3 on the bracket 2. The threaded shaft 4 on the bottom surface of the turntable 3 passes through the through hole on the bracket 2. Screw the nut 41 clockwise on the threaded shaft 4 and tighten the nut 41 to fix the combination of the fixture body 5 and the turntable 3 to the bracket 2;

[0047] (D1) Place the angle grinder body 6 to be machined by turning on the cavity 52, take out the pressing plate 51 and cover it on the angle grinder body 6, and push the pressing plate 51 until the slot hole on it engages with the bolt 511. Then turn the bolt 511 clockwise to lock the pressing plate 51. The locked pressing plate 51 cooperates with the fixture body 5 to fix the angle grinder body 6;

[0048] (E1) When machining the internal structure at the E end face 61 of the angle grinder body 6, slightly loosen the nut 41, pull down the positioning pin 71, and turn the handle 711. Through the cylindrical pin 8 and the pin sleeve 7, the positioning pin 71 is disengaged from the pin hole of the turntable and positioned. Rotate the turntable 3 until the corresponding face E1512 of the fixture body is on the opposite side of the plane where the chassis 1 on the bracket 2 is located and the corresponding face E1512 is parallel to the opposite side of the plane where the chassis 1 on the bracket 2 is located. At this time, turn the handle 711 to drive the cylindrical pin 8 to slide into the chute of the pin sleeve 7, and push the positioning pin 71 through the spring 712 so that the positioning pin 71 engages with the corresponding pin hole on the turntable 3. Use the positioning pin 71 to fix the angular position of the turntable 3 at this time, tighten the nut 41, and machine the internal structure at the E end plane 61 of the angle grinder body 6;

[0049] (F1) When machining the internal structure at the F end plane 62 of the grinder body 6, operate in the same way as (E1);

[0050] (G1) During turning, in order to ensure the dimensional accuracy of the center distance, first machine the E end plane 61 (or F end plane 62) of the angle grinder body 6, control the distance dimension M (or N) from the E end plane 61 (or F end plane 62) to the corresponding face E1512 (or corresponding face F1513), and ensure the dimension from the E end plane 61 (or F end plane 62) to the rotation center, so as to ensure the center distance dimension of the angle grinder body 6.

[0051] Specifically, the angle grinder body 6 is only clamped once on the fixture body 5. After transposition, when tightening the nut 41, it is necessary to ensure that there is no gap contact between the turntable 3 and the bracket 2, so as to ensure that the two center lines of the angle grinder body (6) intersect in the same plane, improve the machining accuracy of the angle grinder body 6, and reduce the amount of defective parts.

[0052] A method for measuring the center distance dimension of an angle grinder body, wherein the measurement method is carried out during or after the processing production process of a fixture for machining an angle grinder body described in any one of the above, and includes the following steps:

[0053] (A2)After all the parts of the angle grinder body 6 that need to be processed are completely processed, after removing the angle grinder body 6 from the tooling, when measuring the two center distance dimensions during quality inspection, the following method is adopted:

[0054] (B2)When measuring the center distance dimension inside the E-end plane 61 of the angle grinder body 6, first hold the cylinder at the outer end of the E-cone gauge 911 by hand, insert the E-cone gauge 911 into the inner hole of the F-end plane 62 until it is completely inserted, and ensure that the inner end face of the E-cone gauge 911 is in close contact with the step inside the inner hole of the F-end plane 62 of the angle grinder body 6; then insert the E-cylinder gauge 91 into the inner hole of the E-end plane 61, and ensure that the inner end face of the E-cylinder gauge 91 is in close contact with the step inside the inner hole of the E-end plane 61 of the angle grinder body 6; finally, use a measuring instrument to extend into the inner hole of the E-end plane 61 through the through hole in the center of the E-cylinder gauge 91; measure the distance from the outer end face of the E-cylinder gauge 91 to the conical surface of the E-cone gauge 911;

[0055] (C2)When measuring the center distance dimension inside the F-end plane 62 of the angle grinder body 6, first hold the cylinder at the outer end of the F-cone gauge 921 by hand, insert the F-cone gauge 921 into the inner hole of the E-end plane 61 until it is completely inserted, and ensure that the inner end face of the F-cone gauge 921 is in close contact with the step inside the inner hole of the E-end plane 61 of the angle grinder body 6; then insert the F-cylinder gauge 92 into the inner hole of the F-end plane 62, and ensure that the inner end face of the F-cylinder gauge 92 is in close contact with the step inside the inner hole of the F-end plane 62 of the angle grinder body 6; finally, use a measuring instrument to extend into the inner hole of the F-end plane 62 through the through hole in the center of the F-cylinder gauge 92; measure the distance from the outer end face of the F-cylinder gauge 92 to the conical surface of the F-cone gauge 921.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights involved.

Claims

1. A method for measuring the center distance dimension of an angle grinder body, characterized in that: The angle grinder body (6) has two end faces, namely the E-end plane (61) and the F-end plane (62); the angle grinder body is clamped by a fixture for the angle grinder body. A cavity (52) for placing the angle grinder body (6) is provided on the fixture body (5) of the fixture. A pressing plate (51) that matches the fixture body (5) to press the angle grinder body (6) is provided on the fixture body (5). The fixture body (5) has two end faces, namely the corresponding face E1 (512) and the corresponding face F1 (513), and both the corresponding face E1 (512) and the corresponding face F1 (513) are planes; the E-end plane (61) of the angle grinder body (6) is parallel to its corresponding face E1 (512) on the fixture body (5), and the F-end plane (62) is also parallel to its corresponding face F1 (513) on the fixture body (5). The measurement of the center distance dimension of the angle grinder body specifically includes the following steps: (A2) After all the parts of the angle grinder body (6) that need to be processed are completely processed, when the angle grinder body (6) is removed from the tooling and the two center distance dimensions are measured during quality inspection, the following method is used: (B2) When measuring the center distance dimension inside the E-end plane (61) of the angle grinder body (6), first hold the cylinder at the outer end of the E-cone gauge (911) by hand, insert the E-cone gauge (911) into the inner hole of the F-end plane (62) until it is completely inserted, and ensure that the inner end face of the E-cone gauge (911) is in close contact with the step inside the inner hole of the F-end plane (62) of the angle grinder body (6); then insert the E-cylinder gauge (91) into the inner hole of the E-end plane (61), and ensure that the inner end face of the E-cylinder gauge (91) is in close contact with the step inside the inner hole of the E-end plane (61) of the angle grinder body (6); finally, use a measuring instrument to extend into the inner hole of the E-end plane (61) through the through hole at the center of the E-cylinder gauge (91); measure the distance from the outer end face of the E-cylinder gauge (91) to the conical surface of the E-cone gauge (911). (C2) When measuring the center distance dimension inside the F-end plane (62) of the angle grinder body (6), first hold the cylinder at the outer end of the F-cone gauge (921) by hand, insert the F-cone gauge (921) into the inner hole of the E-end plane (61) until it is completely inserted, and ensure that the inner end face of the F-cone gauge (921) is in close contact with the step inside the inner hole of the E-end plane (61) of the angle grinder body (6); then insert the F-cylinder gauge (92) into the inner hole of the F-end plane (62), and ensure that the inner end face of the F-cylinder gauge (92) is in close contact with the step inside the inner hole of the F-end plane (62) of the angle grinder body (6); finally, use a measuring instrument to extend into the inner hole of the F-end plane (62) through the through hole at the center of the F-cylinder gauge (92); measure the distance from the outer end face of the F-cylinder gauge (92) to the conical surface of the F-cone gauge (921).

2. The method for measuring the center distance dimension of the angle grinder body according to claim 1, wherein: The fixture for the body of the vehicle angle grinder further includes a chassis (1). One end face of the chassis (1) is provided with a bracket (2) perpendicular to it. Above the bracket (2), a turntable (3) is installed, and the turntable (3) is rotatably connected to the bracket (2) through a threaded shaft (4). The outer end of the threaded shaft (4) passes through a through hole in the bracket (2) and is connected with a nut (41). The fixture body (5) is fixed on the top surface of the turntable (3). On the bracket (2), a pin sleeve (7) is arranged parallel to the threaded shaft (4). A positioning pin (71) and a spring (712) adapted to it are installed in the pin sleeve (7). A plurality of pin holes for indexing and positioning are arranged in the bottom surface of the turntable (3) to cooperate with the positioning pin (71).

3. The method for measuring the center distance dimension of the angle grinder body according to claim 2, wherein: The rotatable angle range of the turntable (3) is 0 to 180°.

4. The method for measuring the center distance dimension of the angle grinder body according to claim 2, characterized in that: The outer end of the positioning pin (71) is connected with a handle (711).

5. The method for measuring the center distance dimension of the angle grinder body according to claim 2, characterized in that: A cylindrical pin (8) for limiting is arranged on the positioning pin (71), and the cylindrical pin (8) is perpendicular to the positioning pin (71). A sliding groove for the cylindrical pin (8) to pass through and slide is arranged on the pin sleeve (7).

6. The method for measuring the center distance dimension of the angle grinder body according to claim 1, wherein: The pressing plate (51) and the fixture body (5) form a detachable structure through bolts (511). Two bolts (511) are symmetrically arranged on the fixture body (5). Slot holes matching the bolts (511) are arranged on the pressing plate (51).

7. The method for measuring the center distance dimension of the angle grinder body according to claim 1, wherein: The angle grinder body (6) is only clamped once on the fixture body (5). After transposition, when tightening the nut (41), it is necessary to ensure that there is no gap contact between the turntable (3) and the bracket (2), so as to ensure that the two center lines of the angle grinder body (6) intersect in the same plane after processing.

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