1基本步骤
(1)调整载物台在导轨上的运动轨迹与压头至观场中心的连线平行:
(2)将视场中二维寻找臣痕变为平行导轨方向的一-维寻找压痕。
2方法
(1)将载物台推至最右端，仅在导轨上推动裁物台，连缓打出一串压痕，且相邻压痕阃的距离即载物台每次以左移量应小于视场直径，保证在一个视场内可 出现两个以上压痕。压痕之问的连线即为载物台在导轨上的运动轨迹
(2)将载物台推至左端，松开导轨紧固螺栓及载台左右限位螺钉.
(3)前后移动并稍转动导轨，观察压窟连线在视中的位置。由于压痕成-长串.故原二维找点简化为在垂直于导轨运动方向的一维找线。将压痕连线调至与视场水平直径重台时固定导轨。
(4)再打一压痕，调节载物台左右限位螺钉，至压痕在视场中心，即平行于导轨方向- -维找点。
3说踢
(1)进行以上调整时.不可拧动载物台的水平，垂直橱节螺杆。
(2)当确信加载零点可靠时，可取最小载荷在极软试洋上不卸载直接推动载物台划出一-道压痕线。再完成前述找线及找点步骤。
标准硬度块使用的几个问题
1标准硬度块两面都可以用吗?
绝大多数不行，只有锤击布氏硬度块可用两个面。在硬度块的生产与标定时主要是保证测量面的表面质量和硬度均匀性，因此测量面与支承面的表面粗糙度- -般是不一样的，在硬度块的标定只对测量面进行，对支承面并没有硬度值或硬度均匀性的要求。用未知的或不可靠的东西来校准硬度计，您愿意吗?
一般标刻有硬度标准值的一面为测量面，对于锤击布氏硬度块(布氏条)有标定压痕的一-面也是测量2我不小心把反面打了硬度了!
以后不要在进行这种“探索”了。
如果打得不多，用锉刀修平支承面上因错打硬度造成的表面凸起。
不进行修磨直接用来支承，一方面使支承面与试台面无法良好接触(对于洛氏硬度试验可直接导致很大的误差)影响测量精度，另一方面可能使试台面损坏，此外如果在压头压入过程中不幸发生了移位还可能损坏压头。3硬度块过期了能用吗?
一般不推荐使用过期的硬度块，并不是说这个硬度块不好了。正如我们不食用过期食品，并不一定是因为过期食品肯定是霉变了一样。
但材料硬度有一定的时效性，即硬度会随着时间发生变化。虽然多数正规企业生产的硬度块都经过人工和自然时效，硬度的变动并不大，但按检定周期重新检定-一下会用起来更安心些。4硬度块硬度值的问题在选用硬度块时我们有一个原则:那就是尽量接近试件的硬度范围。但商品化的标准硬度块不可能囊括全部的硬度范围，这样-一方法没法生产，另一方面工艺方法也不能系统化、标准化，所以硬度块的生产厂家一般以检定规程规定的检定用硬度块的范围进行生产.
如果有特殊需要就得与硬度块生产厂家联系定做。当然定制的硬度块价格会高些，而且有的制造难度会很
商、制造周期也不短。.
通常在工业上使用硬度计，采用检定范围的硬度块对硬度计校准后，测量其他范围硬度时不会有太大的问
题(或者说精度是充足的) . 5硬度块锈了能用吗?
如果锈蚀很董那就只好报废了。如只是局部轻微的锈蚀也许还可以用。如果只是支承面有锈了，只要用砂纸简单地打磨去除就行了。如果测量面局部有锈，应避免在这里测试，即使你把锈去除了那么原先的表面也已不存在了，硬度当然可
能就不同了。
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1 Basic Steps
(1) Adjust the movement track of the loading platform on the guide rail to be parallel to the line between the pressure head and the center of the viewing field:
(2) Change the two-dimensional search marks in the field of view into one - dimensional search indentation in the direction of parallel guide rail.
2 methods
(1) Push the load table to the right end, only push the cutting table on the guide rail, and slow a series of indentation, and the distance between adjacent indentation, namely, the load table each time to the left should be smaller than the diameter of the field of view, to ensure that there can be more than two indentation in a field of view. The line of the indentation is the movement track of the platform on the guide rail
(2) Push the loading platform to the left end, loosen the fastening bolts of the guide rail and the limit screws of the loading platform.
(3) Move back and forth and rotate the guide rail slightly to observe the position of the grotto pressing line in sight. As a result of the indentation into - long string. Therefore, the original two-dimensional point finding is simplified to one-dimensional line finding perpendicular to the movement direction of the guide rail. Fix the guide rail when the indentation line is adjusted to the horizontal diameter of the field of view.
(4) Make an indentation again, adjust the left and right limit screw of the loading platform, until the indentation is in the center of the field of view, that is, parallel to the direction of the guide rail - - find a point.
3 say play
(1) When the above adjustments are made. Do not screw the horizontal and vertical cabinet screw of the loading platform.
(2) when it is sure that the loading zero is reliable, the minimum load can be taken in the very soft test without unloading directly push the loading platform to draw an indentation line. Then complete the aforementioned line finding and point finding steps.
Several problems in the use of standard hardness blocks
Can standard hardness blocks be used on both sides?
Most do not, only hammer brinell blocks can be used on two sides. In the production and calibration of hardness blocks is mainly to ensure the surface quality and hardness uniformity of the measuring surface, so the surface roughness of the measuring surface and the supporting surface is not the same, in the calibration of hardness blocks only on the measuring surface, and there is no hardness value or hardness uniformity of the supporting surface requirements. Would you be willing to calibrate a durometer with something unknown or unreliable?
Generally marked with hardness standard value of the side for the measurement surface, for the hammer brinell hardness block (Brinell bar) with calibration indentation of the one - side is also measured 2 I accidentally hit the hardness on the back!
Don't do this kind of "exploration" again.
If not much, use a file to smooth the surface of the support surface caused by the wrong hardness.
Without grinding directly used to support, on the one hand, the supporting surface and the test table can not be good contact (for Rockwell hardness test can directly lead to a great error) affect the measurement accuracy, on the other hand, the test table may be damaged, in addition, if the head in the process of pressing unfortunately displaced may damage the head. 3 hardness block expired can it be used?
It is generally not recommended to use expired hardness blocks, not to say that this hardness block is not good. Just as we don't eat expired food, it's not necessarily because it must be moldy.
But the hardness of the material has a certain timeliness, that is, the hardness will change with time. Although most of the hardness blocks produced by regular enterprises have been artificial and natural aging, the change of hardness is not big, but according to the verification cycle re-verification - will use more secure. 4 hardness block hardness value problem in the selection of hardness block we have a principle: that is to try to close to the specimen hardness range. But the commercial standard hardness blocks can not contain all the hardness range, such a method can not be produced, on the other hand, the process method can not be systematized, standardized, so the hardness block manufacturers generally in accordance with the verification of the scope of hardness blocks for production.
If there is a special need to contact the hardness block manufacturer customized. Of course, the price of customized hardness blocks will be higher, and some manufacturing difficulties will be very difficult
Business, manufacturing cycle is not short. .
Durometers are usually used in industry, and after being calibrated against the durometer with the hardness block of the test range, there is no great difficulty in measuring the hardness of other ranges
5. Can hardness blocks be rusted and used?
If it rusts badly, it will have to be scrapped. If only a slight local corrosion may also be used. If there is rust only on the support surface, simply sand it away. If there is rust on the measuring surface, you should avoid testing here, even if you remove the rust then the original surface is no longer there, hardness of course
Can is different.
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