硬度計的正確使用方法

下面是：如何選擇合適的洛氏硬度計

目前市面上有很多公司銷售洛氏硬度計，那么我們改如何選擇合適的設備呢？或者說那么多型號該如何選擇呢？

這個問題，對于采購方很是煩惱，因為型號太多，價格不等，不知道該怎樣選擇？

下面就簡單說下，讓您選出合適的洛氏硬度計。
 

洛氏硬度計，是硬度檢測中，應用最廣泛的一種。

由于其操作簡單、測試速度快、對工件要求低、對操作人員要求低等特點，被廣大熱處理工廠、車間、高校、科研所、航空航天等應用。

1、洛氏硬度計原理

洛氏硬度計是深度法原理；

      咱們就用最簡單的話來說，詳細介紹請參考文獻。

      用不同的力值對應不同的壓頭，打出壓痕，直接讀出硬度值。

2、洛氏硬度計分類

按標尺分類：

1. 普通洛氏硬度計，測試HRA、HRB、HRC等共15種標尺;

2. 表面洛氏硬度計，測試HR15N、HR30、HR45N、HR15T等共15種標尺;

3. 塑料洛氏硬度計，測試HRE、HRL、HRM、HRR等塑料標尺；

4. 全洛氏硬度計，測試所有洛氏（普洛、表洛、塑料），共30種洛氏標尺；

按機器分類：

1. 臺式洛氏硬度計；

2. 便攜式洛氏硬度計;

按顯示分類：

1. 指針式（表盤讀數），手動加載、手動卸載、表盤讀數；

2. 數顯式（液晶屏或觸摸屏），自動加載、自動卸載、自動顯示硬度值;

按加力機構分類：

1. 砝碼加載；

2. 閉環傳感器加載;

按國別分類：

1. 國產洛氏硬度計；

2. 進口洛氏硬度計;

按機器結構分類：

1. 絲杠上升；

2. 機頭移動;

按自動化程度分類：

1. 手動洛氏硬度計：初始試驗力手動加載；主試驗力手動加載、手動卸載；

2. 操作步驟：壓頭和樣品接觸，大指針轉三圈，手動扳下加力手柄加載，在手推下手柄卸載，看指針讀數，分辨率0.5HR；

2.電動洛氏硬度計：初始試驗力手動加載；主試驗力自動加載、自動保荷、自動卸載（需要按下“加載鍵”；飽和時間可調）;

操作步驟：壓頭和樣品接觸，大指針轉三圈，按下“加載鍵”，自動加載、自動保荷、自動卸載，看指針讀數，分辨率0.1HR；

3.數顯洛氏硬度計：分兩種

初始試驗力手動加載；主試驗力自動加載、自動保荷、自動卸載；

操作步驟：壓頭和樣品接觸，光標到“OK”處，自動加載、自動保荷、自動卸載，自動顯示硬度值，分辨率0.1HR；
 

初始試驗力自動加載；主試驗力自動加載、自動保荷、自動卸載；

操作步驟：壓頭和樣品間距0.5mm是，按下“加載鍵”，壓頭自動下降，自動加載、自動保荷、自動卸載，壓頭自動提升，自動顯示硬度值，分辨率0.1HR；

4.全自動數顯洛氏硬度計（可參考：全自動洛氏硬度計-一句話了解）

特點：自動升降絲杠、自動選擇試驗力、自動加載初試驗力、自動加載主試驗力，自動卸載、自動顯示硬度計

操作步驟：

一鍵式操作：按啟動鍵，工作臺自動上升，樣品觸碰到壓頭后自動加載，自動卸載，自動顯示硬度值。

（工作臺自動升降（沒有高度限制），無需人工轉動絲桿旋輪。）

5.快速測量洛氏硬度計

特點：4秒顯示硬度值；對工件表面要求低，不用去氧化皮即可測量；帶夾緊裝置，不用輔助支撐，可自動夾緊長軸工件；

按定制分類：

1. 標準機；定制機;

凸鼻子洛氏硬度計：

特點：獨特的“凸鼻子”結構壓頭，可以測試普通硬度計無法測到的表面，如環狀、管狀、框類零件內表面，凸臺類零件底臺等

洛氏硬度標尺、壓頭、試驗力、材料的選擇

洛氏硬度計使用方法

洛氏硬度誤差范圍

最小試樣厚度

通過以上簡單的知識點梳理，希望您能洛氏硬度計有個大概的了解，進而選擇適合您的設備。

      洛氏硬度計根據配置不同、功能不同，價格也會不同。

1、如果，您想選擇最便宜的，那您就選擇：

指針式，手動加載的，皮實耐用，如HR-150A；
 

2、如果，您想選擇性價比高的設備，那您就選擇：

數顯的WHR-150；
 

3、如果，您想要精度高的設備，那您就選擇：WHR-60D，軍工品質
 

4、如果，您自動化程度高的，那您就選擇：

全自動洛氏硬度計
 

5、如果，您一天測很多工件，全檢，要求測量速度快，那您就選擇：

快洛氏硬度計
 

6、如果，你要測比較薄的件，那您就選擇：

表面洛氏硬度計
 

7、如果，您要測工程塑料、亞克力等，您就選擇：

塑料洛氏硬度計
 

8、如果，您要測環狀、管狀、框類零件內表面，凸臺類零件底臺等，您就選擇：

凸鼻子洛氏硬度計
 

9、如果，您要測臺式機方便測試的大件、重件，您就選擇：

便攜式洛氏硬度計

如果您不知道怎么選擇，您聯系我們，給您推薦適合您的機器。

First of all, look at the manual, each hardness tester manual will be more detailed.  

For a hardness tester that has not been exposed to a certain type, you must first read the manual to understand the components and positions of the hardness tester, so as to facilitate the next use.  

Next, how to use the hardness tester  

1, Rockwell hardness tester  

Rockwell hardness tester is the principle of depth, after loading and unloading, directly display hardness value.  

Usage: indenter and sample contact, loading primary test force and main test force, unloading test force, read hardness value.  

There are pointer Rockwell, digital explicit Rockwell, automatic rockwell and other sub-classification, the operation is a little different, but almost the same  

2. Vickers Hardness tester  

Vickers hardness tester, is to use different force value with 136° square pyramid diamond indenter, hit a diamond, measure the length of the diagonal of the diamond, get the hardness value.  

There are single machine and computer software measurement, the operation will be different, but the operation principle is basically the same.  

3. Brinell Hardness tester  

Brinell hardness tester, is to use different force value with different steel ball indenter, hit a circle, measure the diameter of the circle, obtain the hardness value.  

There are weight type, electronic type, sensor loading, and add sianna oh software measurement, the operation will be different, but the operation principle is basically the same.  

The above are the commonly used operation methods of three kinds of hardness tester, and the steps of how to use other hardness tester will be continuously updated in the later period.  

Below is: How to choose the right Rockwell hardness tester  

There are many companies selling Rockwell hardness tester on the market at present, so how do we choose the right equipment?  Or how to choose from so many models?  

This problem is very annoying to the purchaser, because there are too many models and prices vary, so I don't know how to choose.  

The following is a brief description, so that you choose the right Rockwell hardness tester.  

Rockwell hardness tester is the most widely used in hardness testing.  

Because of its simple operation, fast testing speed, low requirements for workpiece, low requirements for operators, it is widely used in heat treatment factories, workshops, universities, scientific research institutes, aerospace and other applications.  

1, Rockwell hardness tester principle  

Rockwell hardness tester is the principle of depth method;  

Let's use the simplest words, detailed introduction please refer to the literature.  

With different force value corresponding to different head, hit indentation, directly read hardness value.  

2, Rockwell hardness tester classification  

Classification by scale:  

Ordinary Rockwell hardness tester, test HRA, HRB, HRC, a total of 15 scales;  

Surface Rockwell hardness tester, test HR15N, HR30, HR45N, HR15T, a total of 15 scales;  

Plastic Rockwell hardness tester, testing HRE, HRL, HRM, HRR and other plastic scales;  

Full Rockwell hardness tester, test all Rockwell (prologor, Table, plastic), a total of 30 rockwell scales;  

By machine:  

Desktop Rockwell hardness tester;  

Portable Rockwell hardness tester;  

By display:  

Pointer type (dial reading), manual loading, manual unloading, dial reading;  

Digital display (LCD or touch screen), automatic loading, automatic unloading, automatic display hardness value;  

According to afterburner mechanism:  

Weight loading;  

Closed-loop sensor loading;  

By country:  

Rockwell hardness tester;  

Rockwell hardness tester;  

Classification by machine structure:  

Screw up;  

Nose movement;  

By degree of automation:  

Manual Rockwell hardness tester: manual loading of initial test force;  Manual loading and unloading of main test force;  

Operation steps: The indenter is in contact with the sample, turn the big pointer three times, manually pull down the afterloading handle, push down the handle to unload, see the pointer reading, the resolution is 0.5hr;  

2. Electric Rockwell Hardness tester: manual loading of initial test force;  Main test force automatic loading, automatic protection, automatic unloading (need to press the "load key";  Adjustable saturation time);  

Operation steps: The pressure head and the sample contact, turn the big pointer three times, press the "load key", automatic loading, automatic protection, automatic unloading, see the pointer reading, resolution 0.1hr;  

3 digital Rockwell hardness tester: divided into two kinds  

Manual loading of initial test force;  Automatic loading, automatic protection, automatic unloading of the main test force;  

Operation steps: Press head and sample contact, cursor to "OK", automatic loading, automatic protection, automatic unloading, automatic display hardness value, resolution 0.1hr;  

Automatic loading of initial test force;  Automatic loading, automatic protection, automatic unloading of the main test force;  

Operation steps: If the distance between the indenter and the sample is 0.5mm, press the "load key", the indenter automatically drops, automatically loads, automatically protects, automatically offloads, automatically lifts the indenter, automatically displays the hardness value, the resolution is 0.1hr;  

4. Automatic Digital Rockwell Hardness tester (can refer to: automatic Rockwell hardness tester - one sentence understanding)  

Features: automatic lifting screw, automatic selection of test force, automatic loading of primary test force, automatic loading of main test force, automatic unloading, automatic display hardness tester  

Operation steps:  

One-key operation: press the start button, the worktable will rise automatically, the sample will load and unload automatically after touching the indenter, and the hardness value will be displayed automatically.  

(The worktable rises and falls automatically (no height limit), without manual rotation of screw wheel.)  

5. Fast measurement of Rockwell hardness tester  

Features: 4 seconds display hardness value;  The workpiece surface requirements are low, do not need to scale can be measured;  With clamping device, without auxiliary support, can automatically clamp the long shaft workpiece;  

By custom classification:  

Standard machine;  Custom machine;  

Convex nose Rockwell Hardness tester:  

Features: the unique "convex nose" structure indenter can test the surface that ordinary hardness tester cannot measure, such as the inner surface of annular, tubular and frame parts, the bottom of convex parts, etc  

Rockwell hardness scale, indenter, test force, material selection  

Rockwell hardness tester method of use  

Rockwell hardness error range  

Minimum sample thickness  

Through the above simple knowledge points combing, I hope you can have a general understanding of rockwell hardness tester, and then choose the equipment suitable for you.  

Rockwell hardness tester according to the configuration of different, different functions, the price will be different.  

1, If you want to choose the cheapest, then you choose:  

Pointer type, manual loading, durable leather, such as HR-150A;  

2, if you want to choose cost-effective equipment, then you choose:  

Digital display WHR-150;  

3, if you want high precision equipment, then you choose: WHR-60D, military quality  

4, if you have a high degree of automation, then you choose:  

Automatic Rockwell hardness tester  

5, if you test a lot of workpiece a day, full inspection, measurement speed, then you choose:  

Fast Rockwell hardness tester  

6, if you want to measure a thin piece, then you choose:  

Surface Rockwell hardness tester  

7, if you want to test engineering plastics, acrylic, etc., you choose:  

Rockwell hardness tester for plastics  

8, if you want to measure the inner surface of annular, tubular, frame parts, the bottom of convex parts, etc., you choose:  

Convex nose Rockwell hardness tester  

9, if you want to test the desktop convenient test of large, heavy parts, you choose:  

Portable Rockwell hardness tester  

If you do not know how to choose, you contact us to recommend the right machine for you.