公开(公告)号：US06247356B1

公开(公告)日：2001-06-19

申请号：US09281449

申请日：1999-03-30

申请人： John J. Merck, Jr. ,  Richard Conti ,  Joerg Meissner ,  Patrick Micozzi

发明人： John J. Merck, Jr. ,  Richard Conti ,  Joerg Meissner ,  Patrick Micozzi

IPC分类号： G01N342

CPC分类号： G01N3/42 ,  G01N2203/0082 ,  G01N2203/0482

摘要： A hardness tester having a frame and a rotatable turret movably supported on the frame is provided. A plurality of load cells are fixedly mountable on the turret, and a plurality of indenters are fixedly attachable to the load cells, respectively. A user interface selectively provides signals to a motor to move the turret into contact with a test specimen via one of the indenters to thereby apply a load on the test specimen. The indenters are fixed with respect to the turret and do not move in relation to the turret when the turret is brought down to bear on the test specimen. The load cells measure the load applied to the test specimen. A closed loop control system receives load measurement signals from the load cells and controls movement of the turret, preventing the motor from applying load in excess of a predetermined selectable load amount input by a user via the user interface. The invention preferably includes a plurality of indenter adapters, each attached to respective undersides of the load cells. Each indenter adapter includes a slot into which the indenter is fittable, and least one set screw for adjusting a horizontal location of the indenter.

摘要翻译： 提供一种具有可移动地支撑在框架上的框架和可旋转转台的硬度计。 多个测力传感器固定地安装在转台上，并且多个压头分别可固定地附接到测力传感器。 用户界面选择性地向马达提供信号，以通过其中一个压头将转台移动到与试样接触，从而在测试样本上施加负载。 压头相对于转台是固定的，并且当转盘被放在试样上时，它们不会相对于转台移动。 称重传感器测量施加到试样上的载荷。 闭环控制系统从负载传感器接收负载测量信号并控制转台的运动，从而防止电动机通过用户界面超过用户输入的预定可选负载量的负载。 本发明优选地包括多个压头适配器，每个连接器连接到称重传感器的相应下侧。 每个压头适配器包括可压入压头的槽，以及用于调节压头水平位置的至少一个固定螺钉。

公开(公告)号：US6142010A

公开(公告)日：2000-11-07

申请号：US821461

申请日：1997-03-21

申请人： John J. Merck, Jr. ,  Jon Wyman ,  Richard Conti

发明人： John J. Merck, Jr. ,  Jon Wyman ,  Richard Conti

IPC分类号： G01N3/00 ,  G01N3/42

CPC分类号： G01N3/42 ,  G01N2203/0082

摘要： A hardness tester is disclosed which conducts its hardness test through a penetrator impinging upon the surface of a test specimen. Enhanced accuracy and repeatability is achieved through the use of a closed loop system and directly mounting a load cell to the indentor, connecting a linear displacement transducer directly to the load cell and eliminating an elevating screw in initially positioning and applying load to the specimen to be tested.

摘要翻译： 公开了一种通过撞击在试样表面上的穿透器来进行其硬度试验的硬度计。 通过使用闭环系统并将称重传感器直接安装在压头上，可以实现提高的精度和重复性，将直线位移传感器直接连接到称重传感器，并消除升降螺钉初始定位并向样品施加载荷 测试。

公开(公告)号：US5616857A

公开(公告)日：1997-04-01

申请号：US591292

申请日：1996-01-25

申请人： John J. Merck, Jr. ,  Jon Wyman ,  Richard Conti

发明人： John J. Merck, Jr. ,  Jon Wyman ,  Richard Conti

IPC分类号： G01N3/00 ,  G01N3/42

CPC分类号： G01N3/42 ,  G01N2203/0082

摘要： A hardness tester is disclosed which conducts its hardness test through a penetrator impinging upon the surface of a test specimen. Enhanced accuracy and repeatability is achieved through the use of a closed loop system and directly mounting a load cell to the indentor, connecting a linear displacement transducer directly to the load cell and eliminating an elevating screw in initially positioning and applying load to the specimen to be tested.

摘要翻译： 公开了一种通过撞击在试样表面上的穿透器来进行其硬度试验的硬度计。 通过使用闭环系统并将称重传感器直接安装在压头上，可以实现提高的精度和重复性，将直线位移传感器直接连接到称重传感器，并消除升降螺钉初始定位并向试样施加载荷 测试。