CN-121989105-A - Method for polishing double sides of metal sheet

CN121989105ACN 121989105 ACN121989105 ACN 121989105ACN-121989105-A

Abstract

The disclosure provides a method for polishing two sides of a metal sheet, and relates to the technical field of metallographic detection and analysis. The method comprises the steps of measuring the size of a metal sheet to determine end face shape data and thickness data of the metal sheet, preparing a resin insert, machining a concave part on one end face of the resin insert according to the end face shape data and the thickness data of the metal sheet, embedding the metal sheet into the concave part in the direction that the first end face of the metal sheet faces the bottom of the concave part, polishing the second end face of the metal sheet, taking out the metal sheet from the concave part after the polishing of the second end face of the metal sheet is finished, embedding the metal sheet into the concave part in the direction that the second end face of the metal sheet faces the bottom of the concave part, polishing the first end face of the metal sheet, and taking out the metal sheet subjected to double-sided polishing from the concave part after the polishing of the first end face of the metal sheet is finished. The present disclosure may improve the efficiency of sanding and polishing both sides of a metal sheet.

Inventors

ZHAO HONGKAI
QUAN WEI
WANG SONGMAO
CHANG KE
HE LEI
WANG TAO
LI SHANGLIN
SHI KEXUE
YANG JUNHONG

Assignees

西安汉唐分析检测有限公司

Dates

Publication Date: 20260508
Application Date: 20260319

Claims (10)

1. A method of sanding and polishing both sides of a metal sheet, comprising: performing size measurement on the metal sheet to determine end face shape data and thickness data of the metal sheet; Preparing a resin insert, and processing a concave part on one end face of the resin insert according to the end face shape data and the thickness data of the metal sheet, wherein the shape of the concave part is consistent with that of the end face of the metal sheet, and the difference between the thickness of the metal sheet and the depth of the concave part is a preset difference value; embedding the metal sheet into the concave part in the direction that the first end face of the metal sheet faces the bottom of the concave part, and polishing the second end face of the metal sheet; Taking out the metal sheet from the concave part after the second end surface of the metal sheet is polished, embedding the metal sheet into the concave part in the direction that the second end surface of the metal sheet faces the bottom of the concave part, and polishing the first end surface of the metal sheet; And taking out the metal sheet subjected to double-sided polishing from the concave part after the first end surface of the metal sheet is polished.
2. The method of claim 1, wherein preparing a resin insert comprises: preparing the resin insert by adopting a hot insert machine; wherein, the resin used for the resin insert is thermosetting resin for metallographic detection.
3. The method according to claim 2, wherein in the case where the resin used for the resin insert is phenolic resin, the working temperature of the hot-insert machine is 160 to 180 ℃, the working pressure is 25 to 30mpa, and the resin curing time is 8 to 10 minutes.
4. The method according to claim 2, wherein in the case where the resin used for the resin insert is an acrylic resin, the working temperature of the hot-insert machine is 140 to 160 ℃, the working pressure is 15 to 20mpa, and the resin curing time is 5 to 6 minutes.
5. The method of claim 1, wherein the end surface shape of the metal sheet is a regular pattern or an irregular pattern, and the regular pattern comprises a circle or a polygon.
6. The method of claim 1, wherein machining a recess in one end face of the resin insert based on end face shape data and thickness data of the metal sheet comprises: Fixing the resin insert on a lathe; and turning a concave part by adopting a diamond lathe tool according to the end face shape data and the thickness data of the metal sheet.
7. The method of claim 1, wherein buffing the second end surface of the metal sheet comprises: and carrying out operations of rough grinding, fine grinding, rough polishing and fine polishing in sequence on the second end face of the metal sheet.
8. The method according to claim 7, wherein the rough polishing is performed by using canvas in combination with a 10 μm silicon carbide suspension.
9. The method according to claim 7, wherein the fine polishing is performed by using silk in combination with a 2.5 μm silicon carbide suspension.
10. The method according to any one of claims 1 to 9, wherein the foil has a thickness of 2-5 mm.

Description

Method for polishing double sides of metal sheet Technical Field The disclosure relates to the technical field of metallographic detection and analysis, in particular to a method for polishing two sides of a metal sheet. Background In metallographic detection analysis work, a large number of sheet metal samples are often subjected to double-sided lapping and polishing treatments. Because the thickness of the sample is thinner, the sample cannot be directly held by hand for polishing operation, and the sample must be fixed in an auxiliary way by virtue of a sample embedding process. The traditional double-sided polishing method adopted at present comprises the steps of carrying out single-sided sample insertion on a metal sheet sample by using a thermal sample insertion machine through resin, polishing one exposed surface of the metal sheet sample after the resin is solidified, breaking off a sample insertion block to take out the sample after polishing, carrying out resin thermal sample insertion on the other surface of the sample, repeating the polishing steps, breaking off the sample insertion block again to take out the sample, and finishing double-sided polishing of the whole sample. The mode needs to carry out twice sample inserting and twice blocking operations, is complex in operation flow, redundant in working procedure, long in time and low in efficiency, and cannot meet the rapid processing requirement of a large number of samples. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention The disclosure aims to provide a method for polishing two sides of a metal sheet, so as to overcome the problem of low efficiency of polishing the two sides of the metal sheet at least to a certain extent. The method comprises the steps of measuring the size of a metal sheet to determine end face shape data and thickness data of the metal sheet, preparing a resin insert, machining a concave part on one end face of the resin insert according to the end face shape data and the thickness data of the metal sheet, enabling the shape of the concave part to be consistent with that of the end face of the metal sheet, enabling the difference between the thickness of the metal sheet and the depth of the concave part to be a preset difference value, embedding the metal sheet into the concave part in the direction that the first end face of the metal sheet faces the bottom of the concave part, polishing the second end face of the metal sheet, taking out the metal sheet from the concave part after the polishing of the second end face of the metal sheet is finished, embedding the metal sheet into the concave part in the direction that the second end face of the metal sheet faces the bottom of the concave part, polishing the first end face of the metal sheet, and taking out the metal sheet subjected to double-sided polishing from the concave part after the polishing of the first end face of the metal sheet is finished. Optionally, preparing the resin insert comprises preparing the resin insert by a hot insert machine, wherein the resin used for the resin insert is thermosetting resin for metallographic detection. Optionally, when the resin used in the resin insert is phenolic resin, the working temperature of the hot insert machine is 160-180 ℃, the working pressure is 25-30 MPa, and the resin curing time is 8-10 min. Optionally, when the resin used in the resin insert is acrylic resin, the working temperature of the hot insert machine is 140-160 ℃, the working pressure is 15-20 MPa, and the resin curing time is 5-6 min. Alternatively, the shape of the end surface of the metal sheet is a regular pattern or an irregular pattern, and the regular pattern comprises a circle and a polygon. Optionally, machining a recess in one end of the resin insert based on the end shape data and the thickness data of the metal sheet includes securing the resin insert to a lathe and turning the recess with a diamond lathe based on the end shape data and the thickness data of the metal sheet. Optionally, the lapping and polishing the second end surface of the metal sheet comprises sequentially performing rough grinding, fine grinding, rough polishing and fine polishing operations on the second end surface of the metal sheet. Alternatively, the rough polishing operation is performed using a canvas in combination with a 10 μm silicon carbide suspension. Alternatively, a fine polishing operation was performed using silk cloth in combination with a 2.5 μm carborundum suspension. Optionally, the thickness of the metal sheet is 2-5 mm. In the scheme of this disclosed exemplary embodiment, on the one hand, resin mold insert can be by reuse, only need carry out the preparation of resin mold insert once, need not repeate