Auxiliary fixture for polishing disc type specimen of fully automatic grinding and polishing machine

Abstract

The present invention discloses an auxiliary fixture for polishing disc-type specimens by a fully automatic grinding and polishing machine, the auxiliary fixture comprising a fixture body, a plurality of limit columns being arranged at the top of the fixture body, and at least one assembly groove being formed at the bottom. The auxiliary fixture of the present invention enables the fully automatic grinding and polishing machine to perform fully automatic grinding and polishing on disc-type specimens of larger sizes under different rotation speeds and downward pressure conditions; ensures the parallelism of the upper and lower surfaces of the sample after grinding and polishing; can simultaneously polish at least three disc-type specimens with a maximum diameter of 2.74 inches in a unit time to present a mirror effect, and the polishing effect between the disc specimens is consistent, effectively improving the polishing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of mechanical polishing devices, and in particular relates to an auxiliary fixture for polishing disc-type specimens of a full-automatic grinding and polishing machine. Background Art

[0002] Referring to ASTM G99-2017 "Standard Test Method for Wear Testing with a Pin-on-Disk Apparatus" developed by the American Society for Testing and Materials, in order to ensure the stability of the wear system under high speed, the high-precision friction and wear testing machines developed by the United States, Europe, Japan and other countries on this basis usually default to a disk-type specimen diameter of 2.74 inches (about 69.6 mm) and a height of 0.26 inches (about 6.6 mm), and this is set as the standard disk-type specimen size.

[0003] In friction and wear tests, the state and degree of wear are directly related to the surface quality of the sample being tested. The surface quality of the sample being tested must be effectively controlled before the test. Mechanical polishing relies on the grinding and rolling action of very fine polishing powder to remove a very thin layer of metal on the grinding surface of the sample to form a flat surface quality with small defects. By improving the surface finish of the sample and eliminating small scratches, the surface quality can be "precisely" controlled, thereby improving the accuracy and effectiveness of the friction and wear test results. Therefore, without considering non-environmentally friendly polishing methods such as electrolytic polishing, a mechanical polishing method with a certain processing efficiency is required to process the surface quality of the sample.

[0004] The standard disc specimen specified by the high-precision friction and wear tester has a large outer diameter but a small height. The handheld polishing method can easily cause inconsistent surface quality control of the disc specimen and low polishing efficiency. In order to reduce the poor surface quality control of the disc specimen caused by human factors during the grinding and polishing process and improve the polishing quality and efficiency, a fully automatic grinding and polishing machine is required.

[0005] Although the fully automatic grinder and polisher can achieve multi-station grinding and polishing, due to the small size of its circular specimen mounting slot (only suitable for circular specimens with a maximum diameter of about 30 mm), it cannot meet the surface polishing requirements of larger disc specimens used in friction and wear tests. Therefore, it is urgent to design an auxiliary fixture that can be used with the fully automatic grinder and polisher to handle the surface polishing quality of larger discs. Summary of the invention

[0006] The present invention is proposed to overcome the shortcomings in the prior art and aims to provide an auxiliary fixture for polishing disc-type specimens of a full-automatic grinding and polishing machine.

[0007] The present invention is achieved through the following technical solutions:

[0008] An auxiliary fixture for polishing disc-type specimens of a full-automatic grinding and polishing machine comprises a fixture body, a plurality of limit columns are arranged on the top of the fixture body, and at least one assembly groove is formed on the bottom.

[0009] In the above technical solution, the clamp body is disc-shaped.

[0010] In the above technical solution, the number of the limiting columns is consistent with the number of the limiting holes of the chuck of the full-automatic grinding and polishing machine.

[0011] In the above technical solution, the plurality of limit posts are evenly distributed along the circumference with the center of the clamp body as the center.

[0012] In the above technical solution, when there are multiple assembly grooves, the multiple assembly grooves are evenly distributed along the circumference with the center of the clamp body as the center.

[0013] In the above technical solution, the diameter of the assembly groove is 1.05 to 1.4 times the diameter of the sample.

[0014] In the above technical solution, the depth of the assembly groove is 0.5 to 0.9 times the height of the sample.

[0015] In the above technical solution, the assembly groove has a circular cross section.

[0016] In the above technical solution, the top surface of the limiting column is parallel to the bottom surface of the assembly groove.

[0017] In the above technical solution, the height of the limiting column is greater than the depth of the limiting hole of the chuck of the full-automatic grinding and polishing machine.

[0018] The beneficial effects of the present invention are:

[0019] The invention provides an auxiliary fixture for polishing disc-type samples by a full-automatic grinder and polisher, which enables the full-automatic grinder and polisher to process the surface polishing quality of a relatively large disc and improves the polishing efficiency; by adopting the auxiliary fixture, the full-automatic grinder and polisher can perform the full-automatic grinding and polishing function on the disc-type sample under different rotation speeds and downward pressure conditions; by adopting the auxiliary fixture, the full-automatic grinder and polisher can ensure the parallelism of the upper and lower surfaces of the sample after grinding and polishing under different rotation speeds and downward pressure conditions; by adopting the auxiliary fixture, at least three disc-type samples with a maximum diameter of 2.74 inches can be polished simultaneously within a unit time to present a mirror effect, and the polishing effects of the disc samples are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an auxiliary fixture for a polishing disc type specimen of a fully automatic grinding and polishing machine of the present invention;

[0021] Figure 2 It is a bottom view of the auxiliary fixture of the polishing disc type specimen of the fully automatic grinding and polishing machine of the present invention;

[0022] Figure 3 It is a top view of the auxiliary fixture of the polishing disc type specimen of the fully automatic grinding and polishing machine of the present invention;

[0023] Figure 4 It is an assembly diagram of the auxiliary fixture of the fully automatic grinding and polishing machine for polishing disc-type specimens in use.

[0024] in:

[0025] 1. Fixture body

[0026] 2 Mounting slots

[0027] 3 Limiting column

[0028] 4 Lower turntable

[0029] 5 Sanding layer

[0030] 6 Chuck

[0031] 7 Limiting hole

[0032] 8 Upper pressure head

[0033] 9 Upper swivel head

[0034] 10 specimens.

[0035] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the auxiliary fixture for the polishing disc type specimen of the full-automatic grinder and polisher of the present invention will be further explained below in conjunction with the accompanying drawings and through specific implementation methods.

[0037] like Figures 1 to 3 As shown, an auxiliary fixture for polishing disc-type specimens of a fully automatic grinding and polishing machine includes a fixture body 1, a plurality of limit columns 3 are arranged on the top of the fixture body 1, and at least one assembly groove 2 is formed on the bottom.

[0038] The clamp body 1 is disc-shaped.

[0039] The number of the limiting columns 3 is consistent with the number of the limiting holes 7 of the chuck of the full-automatic grinding and polishing machine, which is 4 to 8.

[0040] The plurality of limiting posts 3 are evenly distributed along the circumference with the center of the clamp body 1 as the center.

[0041] The number of the assembly grooves 2 is 3 to 8, and the plurality of assembly grooves 2 are evenly distributed along the circumference with the center of the clamp body 1 as the center.

[0042] The diameter of the assembly groove 2 is 1.05 to 1.4 times the diameter of the sample 10 .

[0043] The depth of the assembly groove 2 is 0.5 to 0.9 times the height of the sample 10 .

[0044] The assembly groove 2 has a circular cross section.

[0045] The top surface of the limiting column 3 is parallel to the bottom surface of the assembly groove 2, and the parallelism tolerance between the two is 0.01-0.05.

[0046] The height of the limiting column 3 is greater than the depth of the limiting hole 7 of the chuck of the full-automatic grinding and polishing machine.

[0047] The material of the auxiliary fixture of the polishing disc type specimen of the fully automatic grinding and polishing machine is aluminum alloy, and other materials can also be used or the required surface modification treatment can be performed on the surface of the aluminum alloy.

[0048] Working principle of the present invention:

[0049] The present invention adopts a disc-shaped structure with a diameter larger than the diameter of the grinding and polishing machine sample assembly chuck, which has good machinability and certain anti-rust ability. One side of the auxiliary fixture has an assembly slot for the disc-shaped sample, which can be installed with the disc-shaped sample, and directly contact with sandpaper, polishing cloth, etc. during polishing; the other side is designed with a limit column with a certain height, which can be inserted into the assembly limit hole of the grinding and polishing sample chuck on the upper part of the full-automatic grinding and polishing machine.

[0050] Working process of the present invention:

[0051] like Figure 4 As shown, a grinding layer 5 (sandpaper or polishing cloth) is placed on the lower turntable 4 of the fully automatic grinder and polisher, and after the disc-shaped specimen 10 is installed in the assembly slot 2 at the bottom of the fixture body, the chuck 6 of the fully automatic grinder and polisher is dropped, and the specimen assembly limit hole 7 of the chuck 6 is sleeved on the outside of the limit column 3 of the auxiliary fixture to achieve complete matching of the specimen, the auxiliary fixture, and the chuck. Set the speed, rotation direction, upper pressure head downward pressure, and rotation direction of the lower turntable of the fully automatic grinder and polisher, start the fully automatic grinder and polisher, and repeatedly grind and polish the surface of the disc-shaped specimen, so as to accurately control the surface quality of the specimen.

[0052] The invention provides an auxiliary fixture for polishing disc-type samples by a full-automatic grinder and polisher, which enables the full-automatic grinder and polisher to process the surface polishing quality of a relatively large disc and improves the polishing efficiency; by adopting the auxiliary fixture, the full-automatic grinder and polisher can perform the full-automatic grinding and polishing function on the disc-type sample under different rotation speeds and downward pressure conditions; by adopting the auxiliary fixture, the full-automatic grinder and polisher can ensure the parallelism of the upper and lower surfaces of the sample after grinding and polishing under different rotation speeds and downward pressure conditions; by adopting the auxiliary fixture, at least three disc-type samples with a maximum diameter of 2.74 inches can be polished simultaneously within a unit time to present a mirror effect, and the polishing effects of the disc samples are consistent.

[0053] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0055] In the description of the present invention, 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, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0056] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. An auxiliary fixture for a polishing disc type specimen of a fully automatic grinding and polishing machine, characterized in that: The invention comprises a fixture body (1), wherein a plurality of limiting columns (3) are arranged at the top of the fixture body (1), and at least one assembly groove (2) is formed at the bottom. The fixture body (1) is disc-shaped, and the assembly groove (2) has a circular cross section. The top surface of the limiting column (3) is parallel to the bottom surface of the assembly groove (2). The number of the limiting columns (3) is consistent with the number of limiting holes (7) of the chuck of the fully automatic grinding and polishing machine. The limiting columns can be inserted into the assembly limiting holes of the upper grinding and polishing sample chuck of the fully automatic grinding and polishing machine. A grinding layer (5) is placed on the lower turntable (4) of the fully automatic grinding and polishing machine. The plurality of limiting columns (3) are evenly distributed along the circumference with the center of the fixture body (1) as the center. When there are a plurality of assembly grooves (2), the plurality of assembly grooves (2) are evenly distributed along the circumference with the center of the fixture body (1) as the center.

2. The auxiliary fixture for polishing disc type specimens of the fully automatic grinding and polishing machine according to claim 1 is characterized by: The diameter of the assembly groove (2) is 1.05 to 1.4 times the diameter of the sample (10).

3. The auxiliary fixture for polishing disc type specimen of the fully automatic grinding and polishing machine according to claim 2 is characterized in that: The groove depth of the assembly groove (2) is 0.5 to 0.9 times the height of the sample (10).

4. The auxiliary fixture for polishing disc type specimens of the fully automatic grinding and polishing machine according to claim 1 is characterized in that: The height of the limiting column (3) is greater than the depth of the limiting hole (7) of the chuck of the fully automatic grinding and polishing machine.

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