一、用途(Use)

牙板是搓牙機之常用模具，用於螺絲牙成型。
The thread rolling die is the regular die of the thread rolling machine. It is used to machining screws.

二、 牙板功能區域劃分 (Functional segments of Thread Rolling Dies )

A、出牙區
(Functional segments of Thread Rolling Dies)
B、 切斷區 (Shutoff areas)
C、 中心線 (Center line)
D、整形區 (Reforming areas)
E、 出牙區 (Thread Rolled-out Areas)

三、牙板的主要技術參數
(The main technical parameters of thread rolling dies)

a. 牙距 (Distance of Threads)
b. 牙深  (Depth of Threads)
c. 螺旋角 (Angles of Screw threads)
d. 牙山角度 (Angles of Thread-mounted )
e. 尖尾角度 (Angles of Pointed Ends)

名詞解釋：

1、 牙板車種：即搓牙機車種，不同車種的牙板尺寸大小不同。
Machinery Types for Thread Rolling Dies: It also can be named as thread rolling machines. All variety of thread rolling machines have different kind of thread plates size.

2、 牙數：螺紋1英寸中牙的數量。
Numbers of threads: the numbers of screw threads within one inch.

3、 牙距：螺紋相鄰兩個牙型上對應點的軸向距離。
Distance of Threads: the axial distance of corresponding points within two adjacent screw threads.

四、牙紋轉造法 (Methods of Screw Threads Displacement)

圓形柱或其它形狀線材在常溫下用帶牙紋的模板（即牙板）強迫緊壓並使其轉動，使其表面在牙模內形成牙紋。這種冷加工牙紋的方法通稱為牙紋轉造法。使用牙紋轉造法加工螺紋，其牙紋及牙底受壓力加工硬化，螺絲的機械性能較好。而且表面光滑，與牙紋切削成型法相比，具有速度快、產量高、精度均一等優點。
At normal temperature, cylindrical cones or other shaped wires force them strictly pressed and rotated by using thread rolling dies, and then screw threads could be formed inside the surface of threads. This kind of threads coolant machining method is “Screw Threads Displacement”.Using the threads displacement method, as the screw thread and the bottom which are hardened, and it is with great mechanical properties. The surface is smooth. Comparing the threading forming method, they are with the advantages of speedy, higher volume, more precise and same accuracy.

五、搓牙時機重點(The main points of thread rolling dies)

⑴ 牙板訂購時必須注明牙徑尺寸。
One should mark the dimension of threads upon placing an order.

⑵ 搓牙徑及牙距不符合牙板規格，不能共用及代用。
Thread-rolled diameter and thread distance don't meet specifications, and they can not be shared and replaced.

⑶ 訂購時長度指定正確，以免在使用時再研磨之麻煩。
The correct length is indicated upon of placing orders,and then one can avoid prefabricating upon of the use once.

⑷調機時注意”上下平行度”兩牙板心須平行。
Upon of the machine adjustment, please note the up-and-down paralleling rate. . It is that the two thread die must be paralleled.

⑸托料板進退距離必須適當。
The forward-and-backward feeding distance must be proper.

⑹牙距之調整心須正確，以免牙紋剝落。
Pitch of thread must be appropriate in case of threads defoliated.

⑺牙紋之成形，慢慢加壓至牙峰正常為止，切不可過壓。
Threads forming, one can slowly increase the press till the thread top is normal and not to press over.

⑻一切調整正確後，先看剪斷之鐵渣是否正常。
After adjusting correctly, one should pre-check the iron scum normally.

⑼鐵渣在此情形，有三種原因(Three reasons of iron scum)：

1) 牙板之爬山位太快切，此處之摩擦面有明顯之亮度，從發之處，用鑽石銼刀或油石磨掉。(注意不可磨太多）
The climbing place is to be fast cut, and the friction surface is obviously bright. From the starter, they are eliminated by using diamond cutters or oil stones. (Be careful not to fabricate too many)

2) 線材太硬，必須先退火後再搓牙。
The wire is too harden and must be annealed and then thread rolled.

3) 兩面牙板之尖頭成型位置不正確。(活動面之牙板可前、後調整）
The pointed thread forming of two-face thread die is incorrectly placed. (The thread die in the flexible side can beadjusted forward and backward.）

⑽起動點不可過壓。
The starting point should not be over-voltage.

⑾機臺活動道不可鬆，必須穩定以免調機困難。
Avoiding the difficulties of adjusting machine, the machine activity way should be stabilized and not to be loosened.

⑿頭部座面傷紋，由牙距調整不良及進料時上面壓板過壓引起。
The thread head damage is caused by bad adjusting distance and over-voltage feeding in the upper part.

⒀輾造過程中，切不可缺油，以免影響牙板夀命。
During the thread rolling process, it must be no fuel leakage to avoid shortening the thread life.