穿孔机

The main difficulty while rolling φ426 mm tube by this mill is that the roll barrel of No.

在φ400机组上生产φ426mm钢管的主要困难是No，1穿孔机的辊面长度太短（760mm）。

In a routine test, these points are marked by center punch, but, if a more detailed test is to be carried out, the extension is measured by an instrument called an extensometer, which produces the gauge points when it is attached to the test-piece.

在常规测试中，这些点用中心穿孔机标记但是，如果要进行更仔细的测试，延伸量要用名叫引伸计这种仪器进行测量，当引伸计连接试样时，它产生标距点。

As a new machine pilling up the vacancy in this field, its design relates to mechanics, electronics, pneumatics, and touches on other subjects such as soil mechanics and radio goniometry, etc.

作为目前世界上尚处以空白的新型曲线穿孔机，其设计除涉及机械、电子、气动等技术外，还涉猎到土力学、无线电测量等学科。

Of equipment; without a motor and intended for hand operation("a manual keypunch";"a manual typewriter").

对设备而言，指无马达和用手操作的设备（如人工键穿孔机、人工打字机）。

In order to check and control trajectory of the curve of punch, the author studies the location principle of the punch, and determines the parameters that need to be measured during the punch works.

为对穿孔机曲线轨迹进行检测与控制，文章分析了穿孔机的定位原则，确定了穿孔机施工时需要测量的参数。

In this paper, the pneumatic percussive steerable mole is based on DH Series underground mole and come into being by improving it.

本文中，气动冲击式轨迹可控穿孔机是以DH系列地下穿孔机为基础，通过改进而成的。

Piercing mill is the most important equipment on the rolling pipe line,and the frame is the nucleal component of the piercing mill.

穿孔机是轧制钢管的重要设备，而机架又是穿孔机的核心组成部分。

It can implement different path construction and deviation correction of the mole through applying a steering torque to the mole to change its working configuration and the orientation of the steering head slant face and make the mole advance according to the predetermined path. In this paper, Fussy Control is selected as the method of controlling the construction path of the mole and a set of detailed control strategy is established.

此外，针对气动冲击式轨迹可控穿孔机的施工特点，还专门设计了微型化和抗冲击的定位测量系统，以实现在施工过程中对穿孔机的监测，其测得的穿孔机实际运行轨迹用于和设计轨迹进行比较，作为对穿孔机施工轨迹进行控制的依据；以及由控向机构和挠性杆组成的控向系统，其作用是通过施加控向扭矩于穿孔机来改变穿孔机的工作模式及导向穿孔头斜面的朝向，从而实现不同性质轨迹施工和偏离修正，保证穿孔机尽可能按照设计轨迹进行施工。

What's more, a special locating and measuring equipment is designed according to the characteristics of the pneumatic percussive steerable mole, which is minisized and able to stand strong impact. By using it, the mole can be monitored during construction. By comparing the actual path to the predetermined path, the construction path of the mole can be controlled. The steering equipment comprises a steering tool and flexible pipes. It can implement different path construction and deviation correction of the mole through applying a steering torque to the mole to change its working configuration and the orientation of the steering head slant face and make the mole advance according to the predetermined path.

此外，针对气动冲击式轨迹可控穿孔机的施工特点，还专门设计了微型化和抗冲击的定位测量系统，以实现在施工过程中对穿孔机的监测，其测得的穿孔机实际运行轨迹用于和设计轨迹进行比较，作为对穿孔机施工轨迹进行控制的依据；以及由控向机构和挠性杆组成的控向系统，其作用是通过施加控向扭矩于穿孔机来改变穿孔机的工作模式及导向穿孔头斜面的朝向，从而实现不同性质轨迹施工和偏离修正，保证穿孔机尽可能按照设计轨迹进行施工。

The pneumatic percussive steerable mole adopts the percussion part of the underground mole, which has a bi-stable steering head updated from the old symmetrical stepped head. So it can construct along a curve path and implement deviation correction.

其中，气动冲击式轨迹可控穿孔机采用了地下穿孔机的冲击部分，并将其原来的对称式阶梯形冲击头改进为具有导向功能的双稳式导向穿孔头，从而使穿孔机可以进行曲线轨迹施工以及当发生偏离时可以进行纠偏。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。