BRANCH:涉及領域 Foundries, hardening shops, combustion engine construction
鑄造，硬化加工，燃機建造

TASK:任務      Hardness testing on the running surfaces of   camshafts
在凸輪軸的運行表面上進行硬度測試

In order to attain adequate service lives, that means high capacity of resistance to wear, camshaft running faces are hardened, for example in the laser beam remelting process.
為了獲得足夠的服務期限，意味著凸輪軸的表面要有高的耐磨性能，可以通過表面硬化來實現，比如激光重熔工藝
It must be ensured in this process that the martensitic micro-structure is developed uniformly over the camshaft contour by exact thermal processes and time sequences.
通過加熱工藝和時間順序確保凸輪軸表面能形成均勻的馬氏體結構
This process is checked by means of hardness testing. This calls for a method that keeps the necessary time expenditure within certain limits even with statistically required multiple measurements.
通過硬度實驗對這項工藝進行核查， 這項工藝在一定的期限內需要花費必要的時間甚至需要進行多種硬度測試

SOLUTION: 方案
We recommend the hardness test according to the UCI method.
推薦應用UCI方法進行硬度測試
Using the test load of 0.3 kgf (3 N) and 1 kgf (10 N) respectively, an approximative nondestructive surface hardness determination is achieved (experience shows that the indentation depths of Vickers diamonds are at around 4 to 7 μm).
通過分別施加0.3 kgf (3 N) 和1 kgf (10 N)載荷來獲得近似的且表面沒有損壞的硬度值（經驗得出維氏金剛石的壓痕深度大約在4-7 μm之間）
The measuring process is considerably simplified by the special test support MIC 225 for hardness testing on camshafts.
通過應用MIC225進行凸輪軸硬度實驗大大簡化了檢測過程。

This is achieved by mounting the camshaft in vee-blocks and an air bearing slide carriage with probe support guiding the measuring device parallel to the shaft axis. The torsion of the shaft during the measuring process is prevented by a magnetic locking.
通過將凸輪軸安裝在V形塊中和帶有探頭支架的空氣軸承滑座上實現的，該裝置平行于凸輪軸線，在測量過程中軸的扭矩是通過磁鎖進行給固定的。

This ensures an exact positioning of the probe on the camshaft base circle or camshaft tip.
確保了探頭在凸輪軸的弧面和尖端接觸的精確的定位。

SUITABLE EQUIPMENT:
設備

Hardness tester:  MIC 10, MIC 10 DL
硬度計

Probes:    MIC 2003-A  (motor probe)
MIC 201-A    (hand-held probe)
探頭

Accessories:   MIC 225        (camshaft test support)
附件