硬度计的正确使用方法

下面是：如何选择合适的洛氏硬度计

目前市面上有很多公司销售洛氏硬度计，那么我们改如何选择合适的设备呢？或者说那么多型号该如何选择呢？

这个问题，对于采购方很是烦恼，因为型号太多，价格不等，不知道该怎样选择？

下面就简单说下，让您选出合适的洛氏硬度计。
 

洛氏硬度计，是硬度检测中，应用最广泛的一种。

由于其操作简单、测试速度快、对工件要求低、对操作人员要求低等特点，被广大热处理工厂、车间、高校、科研所、航空航天等应用。

1、洛氏硬度计原理

洛氏硬度计是深度法原理；

      咱们就用最简单的话来说，详细介绍请参考文献。

      用不同的力值对应不同的压头，打出压痕，直接读出硬度值。

2、洛氏硬度计分类

按标尺分类：

1. 普通洛氏硬度计，测试HRA、HRB、HRC等共15种标尺;

2. 表面洛氏硬度计，测试HR15N、HR30、HR45N、HR15T等共15种标尺;

3. 塑料洛氏硬度计，测试HRE、HRL、HRM、HRR等塑料标尺；

4. 全洛氏硬度计，测试所有洛氏（普洛、表洛、塑料），共30种洛氏标尺；

按机器分类：

1. 台式洛氏硬度计；

2. 便携式洛氏硬度计;

按显示分类：

1. 指针式（表盘读数），手动加载、手动卸载、表盘读数；

2. 数显式（液晶屏或触摸屏），自动加载、自动卸载、自动显示硬度值;

按加力机构分类：

1. 砝码加载；

2. 闭环传感器加载;

按国别分类：

1. 国产洛氏硬度计；

2. 进口洛氏硬度计;

按机器结构分类：

1. 丝杠上升；

2. 机头移动;

按自动化程度分类：

1. 手动洛氏硬度计：初始试验力手动加载；主试验力手动加载、手动卸载；

2. 操作步骤：压头和样品接触，大指针转三圈，手动扳下加力手柄加载，在手推下手柄卸载，看指针读数，分辨率0.5HR；

2.电动洛氏硬度计：初始试验力手动加载；主试验力自动加载、自动保荷、自动卸载（需要按下“加载键”；饱和时间可调）;

操作步骤：压头和样品接触，大指针转三圈，按下“加载键”，自动加载、自动保荷、自动卸载，看指针读数，分辨率0.1HR；

3.数显洛氏硬度计：分两种

初始试验力手动加载；主试验力自动加载、自动保荷、自动卸载；

操作步骤：压头和样品接触，光标到“OK”处，自动加载、自动保荷、自动卸载，自动显示硬度值，分辨率0.1HR；
 

初始试验力自动加载；主试验力自动加载、自动保荷、自动卸载；

操作步骤：压头和样品间距0.5mm是，按下“加载键”，压头自动下降，自动加载、自动保荷、自动卸载，压头自动提升，自动显示硬度值，分辨率0.1HR；

4.全自动数显洛氏硬度计（可参考：全自动洛氏硬度计-一句话了解）

特点：自动升降丝杠、自动选择试验力、自动加载初试验力、自动加载主试验力，自动卸载、自动显示硬度计

操作步骤：

一键式操作：按启动键，工作台自动上升，样品触碰到压头后自动加载，自动卸载，自动显示硬度值。

（工作台自动升降（没有高度限制），无需人工转动丝杆旋轮。）

5.快速测量洛氏硬度计

特点：4秒显示硬度值；对工件表面要求低，不用去氧化皮即可测量；带夹紧装置，不用辅助支撑，可自动夹紧长轴工件；

按定制分类：

1. 标准机；定制机;

凸鼻子洛氏硬度计：

特点：独特的“凸鼻子”结构压头，可以测试普通硬度计无法测到的表面，如环状、管状、框类零件内表面，凸台类零件底台等

洛氏硬度标尺、压头、试验力、材料的选择

洛氏硬度计使用方法

洛氏硬度误差范围

最小试样厚度

通过以上简单的知识点梳理，希望您能洛氏硬度计有个大概的了解，进而选择适合您的设备。

      洛氏硬度计根据配置不同、功能不同，价格也会不同。

1、如果，您想选择最便宜的，那您就选择：

指针式，手动加载的，皮实耐用，如HR-150A；
 

2、如果，您想选择性价比高的设备，那您就选择：

数显的WHR-150；
 

3、如果，您想要精度高的设备，那您就选择：WHR-60D，军工品质
 

4、如果，您自动化程度高的，那您就选择：

全自动洛氏硬度计
 

5、如果，您一天测很多工件，全检，要求测量速度快，那您就选择：

快洛氏硬度计
 

6、如果，你要测比较薄的件，那您就选择：

表面洛氏硬度计
 

7、如果，您要测工程塑料、亚克力等，您就选择：

塑料洛氏硬度计
 

8、如果，您要测环状、管状、框类零件内表面，凸台类零件底台等，您就选择：

凸鼻子洛氏硬度计
 

9、如果，您要测台式机方便测试的大件、重件，您就选择：

便携式洛氏硬度计

如果您不知道怎么选择，您联系我们，给您推荐适合您的机器。

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.