“Machine Tool Control System”, “Mechanical System”. The
Processing Documents” form “Computer-Input Machine Tool Control System” through programming. The “Control System” controls the “Machine Tool” to complete the program actions and therefore finishes the Processing Instructions. The “Mechanical System” is based upon the “Machine Tool Body”. It includes the “Coordinates Work-Table”, “Kinetic Wire System”, “Cooling System”.
由上图可见整个系统主要由计算机系统、机床控制系统和机械系统组成。加工文件通过编程形成计算机输入机床控制系统，并由控制系统控制机床完成程序的动作，以此完成加工指令。机械系统以床身为基础，包括坐标工作台、运丝系统、冷却系统。
The “Micro-Computer System” allocated by this Machine Tool is a new generation “Control System”. For details, please refer to “Use Description and Machine Tool Running System Parts”. It mainly consists of the Micro-Computer with the collocation of “Special-Purpose Interpolating Control Software”, “Interface Circuit”, “Stepping Drive Circuit”. It has the sound operationality because of the adoption of the advanced CNC technology.
本机所配的微机系统是新一代的控制系统，详见〈使用说明书、电器部分〉。其主要由微机配上专用的插补控制软件及接口电路和步进驱动电路组成，由于采用了先进的CNC技术，所以具有良好的操作性。
Mechanical System Structure 机械系统结构
The Mechanical System Part of this “Machine Tool” is composed of the key elements such as the “Machine Tool Body”, “Work-Table”, “Kinetic Wire Device”, “Coil Holder” (including Taper Device), “Cooling System” etc.
本机床的机械系统部分由床身、工作台、运丝装置、线架（包括锥度装置）及冷却系统等重要部件组成。
Machine Tool Body 床身
“Machine Tool Body” is a basic part of the “Machine Tool”. If all these components have been installed in the body, it can guarantee the high accuracy to the whole system because of the enough rigidity and vibration-resistance. There are two “Hoisting Screws” mounted respectively in the fore-and-aft sides of the “Machine Tools” below DK7750 which have been produced by this Company. They function as hanging the “Machine Tool”. It can remove the “Hoisting Screws” after installation. The large-size Machine Tools use the “Hoisting Holes”. The “Supporting Feet” with the adjustable level have been installed in the bottom of the “Machine Tool Body”. 床身是机床的基础件。以上这些部件都装在其上，所以其足够的刚性与抗振性使整个系统有高精度的保证。本公司生产的DK7750以下机床，其床身前、后两面各装有两个起吊螺丝，其作用是吊装机床使用。起吊螺丝安装后可拆下，大型机床用起吊孔，床身底部装有可供调节水平的支承脚。
Work-Table
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工作台
The Worktable is composed of two “Upper and Lower Tool Carriages” making relative cross movements and precise “Lead-Screw Drive Pair”. Please refer to Table 2 and 3 for the “Drive System”.
工作台是由二块相对十字运动的上下拖板及精密丝杠传动副所组成，其传动系统见图2和图3。
The Structural Formula of “V-Thread Drive” is as follows: (See Table 2) 三角螺纹传动的结构式如下（见图2）
X-Directional: Feed Pulse → Step-Motor E1→ Gear Pair Z1/Z2→ Lead-Screw M1 X向：进给脉冲→步进电机E1→齿轮副Z1/Z2→丝杠副M1 Y-Directional: Feed Pulse → Step-Motor E2→ Gear Pair Z3/Z4→ Lead-Screw Pair M2 Y向：进给脉冲→步进电机E2→齿轮副Z3/Z4→丝杠副M2
The Structural Formula of Ball-Screw Drive Pair is as follows: See Table 3 滚珠丝杠传动副的结构式如下，见图3：
X-Directional: Feed Pulse → Step-Motor E1→ Gear Pair Z1/Z2 → Lead-Screw Pair G1 X向：进给脉冲→步进电机E1→齿轮副Z1/Z2→丝杠副G1
Y-Directional: Feed Pulse → Step-Motor E2→ Gear Pair Z3/Z4→ Lead-Screw Pair G2 Y向：进给脉冲→步进电机E2→齿轮副Z3/Z4→丝杠副G2
In addition, it can also fulfill the quick movement of the “Work-Table” through “X-Directional and Y-Directional Handles”.
另外通过X向、Y向两个手柄，也可实现工作台快速移动。 Page 3 第三页
Electrode Wire 电极丝
Kinetic Wire Tube 运丝筒 Tacking 紧钉
Guide Screw B 丝杆B
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Wire-Positioning Wheel 排丝轮
Handle 手柄
Conductive Wheel 导电轮
Guide Wheel 导轮
Diagram 2 图2
V-Thread Drive System 三角螺纹传动系统
Diagram 3 图3
Ball-Screw and Synchronous Belt Drive System 滚珠丝杠及同步带传动系统 Page 4 第四页
Kinetic Wire Device 运丝装置
It consists of the Motor, Coupler, “Wire Storage Tube”, “Gear Drive Components”, “Slide Plate”, “Kinetic Wire Base”, “Lead-Screw Pair” etc. Because of the action of “Left & Right Link Stoppers” and “Stroke Switch”, it implements the reciprocating movements to the “Electrode Wire” that has been coiled in “Wire Storage Tube” in order to complete cutting to “Work-Pieces”. 由电机、联轴器、贮丝筒、齿轮传动部件、滑板、动丝底座及丝杠副等组成。由于左右撞块及行程开关的作用，使缠绕在贮丝筒的电极丝实现往复运动，来完成对工件的切割。
Please See Diagram 2 or Diagram 3 for the Drive System: 其传动系统见图2或图3：
Motor H→ Coupler → High Speed Rotating Wire Tube → Gear Z5/Z62Z7/Z8 → Lead-Screw Pair T
电机H→联轴器→高速旋转丝筒→齿轮Z5/Z62Z7/Z8→丝杠副T。
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Coil Holder 线架
“Coil holder” is a device which supports the “Electrode Wire”, adjusts the “Cutting Thickness” and carries out various “Taper Cutting”. It installs the “Electrode Wire” onto “Work-Piece” which has been chucked in the “Work-Table” through “Wire-Positioning Wheel”, “Conductive Device”, “Guide-Wheel Group”. “Conductive Block” electrifies “Electrode Wire” under action of “HF Pulse Mains”. The “Liquid Medium” ejected from “Liquid Injection Device” has been broken down to form “Spark Discharge” which completes the “Work-Piece Cutting”.
线架是用来支承电极丝，调节切割厚度及进行各种锥度切割的一个装置。它通过排丝轮，导电装置及导轮组，将电极丝引到装夹于工作台上的工件上。由于通过导电块在高频脉冲电源作用下，使电极丝带电，利用喷液装置喷出来的液体介质被击穿后形成火花放电来完成对工件的切割。
Because it acts to various “Structural Composition” of the “Coil Holder”, it is divided into “Fixed Coil Holder”, “Adjustable Coil Holder”, “Taper Coil Holder”.
由于作用不同线架的结构形成，通常有固定线架，可调线架及锥度线架之区别。
Fixed Coil Holder 固定线架
The “Upper and Lower Coil Holders” of such structural “Coil holder” have been fixed above the “Upright Column”. It can not be adjusted. It has the advantages of the fine Rigidity and sound Machining Stability. But its max. shortcoming lies in the small cutting range which can not be regulated. Therefore it has limitations for the product machining. At present, it has been gradually replaced by the “Adjustable Coil Holders”.
此种结构线架其上下悬臂固定于立柱之上，不可调节。其优点是刚性较好，加工稳定性也较好，但其最大缺点是切割范围较小，且不能调节，因此产品加工有局限性。目前已逐步被可调形线架所代替。
Elevated Adjustable Coil Holder 升降式可调线架
The “upper coil Holder” can move up and down along the “Upright Column” so that it can adapt to the spare machining with different thickness.
是使上悬架可沿立柱上下移动，以此来适应不同厚度的零件加工。
Tapered Type Coil Holder 锥度式线架
In fact, this Structure is the “Elevated Type” plus one “Taper Cutting Device”. The “Taper Device” produced by our company has the multiple specifications such as 6°, 12°, 15°, 30°, 60° etc. It can basically satisfy various requirements from vast consumers. With the
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collocation of the corresponding “Control Device”, it can easily fulfill “X, Y, U and V Four-Shaft Linkage”.
这种结构实际上是升降式再加上一个锥度切割装置，本公司生产的锥度装置有6°、12°、15°、30°、60°等各种规格，基本上能满足用户的各种需要，配上相应的控制装置能很容易地实现X、Y、U和V四轴联动。
Technical Parameters 技术参数
Characteristic Model Stipulations 特性型号的规定
At present, DK77 serial goods produced by our company is mainly divided into three kinds of Model E, Model F, Model G according to different “Power Stroke” (Specification) and Structural Form of the Coil Holder.
我公司目前生产的DK77系列产品，主要是按其工作行程（规格）及其线架结构形式不同可分为E型、F型和G型三种。
Model E — Adjustable Coil Holder Height, therefore it is called “Adjustable Coil Holder”. E型——线架高度可调节，称可调线架。
Model F —— The “Coil Holder Height” can be regulated, it is also allocated with below 6° Taper Cutting Device. Therefore it is called “Adjustable Small-Taper Coil Holder”. F型——线架高度可调节且配以6°以下锥度切割装置，称可调小锥度线架。
Model G —— The “Coil Holder Height” can be regulated. It is also allocated with our patent “Large-Taper Cutting Device” with the “Tracking Hydrojet”. It is called “Large Taper Coil Holder”. It commonly has 30° or 60° Upper Limit Specifications and so on.
G型——线架高度可调节且配以由公司专利的带跟踪喷液的大锥度切割装置。大锥度线架，常用的有上限为30°或60°等各种规格。
The Model Composition and Representative Meaning are in line with Standards JB/T7445 and 2-94.
型号组成及代表意义依据标准JB/T7445、2-94。
Coil Holder Form 线架形式
Principal Parameter (Work-Table Lateral Stroke 1/10) 主参数（工作台横向行程1/10）
Machine Tool Series 机床系列
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