Instron 1000KPX-J3, Руководство по концепции системы

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35
Frame
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During a test, the crosshead is secured to the columns by multiple hydraulic crosshead lock cylinders.
The number of lock cylinders is dependent on the frame model (refer to
Table 5 ). The lock cylinders
provide enough clamping force so that the crosshead can maintain its position on the columns during
testing; even testing at full frame capacity - this provides a rigid frame for testing. In addition, the lock
cylinders have an electrical interlock that prevents starting a test or adjusting the hydraulic cylinder if
the crosshead is unclamped.
The hydraulic lift and lock cylinders are operated by controls on a lifts and locks control unit that is
mounted to the frame. The hydraulic lift and lock cylinders receive hydraulic pressure from the HPS.
A separate manifold directs the flow of oil to the cylinders from the HPS. For more information on the
manifold, refer to
“Lifts and locks manifold assembly” on page 46 .
•
J4-style crosshead - The crosshead is fixed; no adjustment is possible.
Figure 15. Crosshead styles and components.
1. Crosshead - adjustable
(J1-style or J3-style crosshead)
2. Manual crosshead clamp
3. Crosshead support collar
4. Hydraulic crosshead lock cylinder
5. Clamp bolt
6. Hydraulic crosshead lift cylinder
7. Lock cylinder covers
8. Crosshead - fixed
(J4-style crosshead)
J1-Style Crosshead J3-Style Crosshead J4-Style Crosshead
1
2
3
7 1
4
5
3
6
8
Table 5. Number of lock cylinders used for frames with a J3-style crosshead.
Frame Model Number of Lock Cylinders
600KPX-J3, 1500KPX-J3 6
1000KPX-J3 4
2000KPX-J3 8