Ming's Blogger

2014年10月24日星期五

木工(10)：鑽孔刀具

鑽孔用的刀具，千變萬化，這篇是之前為了取門鎖的孔，所查到的資料，順道整理上來。話說鑽孔有分很多刀子，就利度而言，一般材質的刀子可能只能鑽柳桉、松木之類較軟的木頭，但要鑽到橡木、胡桃以上，真的要買好的刀。

其次要鑽出一個孔，可以用銑刀或者鑽頭，其差別在於鑽頭有側面刃口，在外緣有尖的沉割刃，使孔側面更加平整。

三尖鑽頭，材質HSS，不同一般金屬鑽頭在於頂端有三個尖點，比起金屬鑽頭來說可以減少撕裂毛邊，但還是有一些裂邊的問題。尺寸大多在2~12mm。	四刃木工鑽頭，材質HSS，四刀刃排屑快，鑽出圓孔漂亮不會有毛邊，不過只有較大直徑的鑽頭有四刃 (7~26 mm)。

木工扁平鑽頭(又稱鈑鑽)，材質HSS，鑽孔時省力、快速，直徑6~40mm/刃長:116mm，柄徑:1/4:(6.35mm)六角軸。	螺旋木工鑽頭(短)，木材貫穿鑽孔適用尖端螺牙設計加工效率佳，特殊合金鋼製作

圓穴鑽，材質HSS鎢鋼刀刃鑽頭將木材完全鑽透，從30~100 mm

取空刀 (取孔鑽頭)，刀尖處材質常見為鎢鋼，將木材鑽出欲使用的大小，挖空底部較平整，從15~85mm	透空刀 (開孔器)，刀尖處材質常見為鎢鋼，因為鑽孔的深度有限，所以太厚又太硬的木頭得依情況考量來選用。

做了一陣子的木工，剛好有個朋友拜託我幫忙做門鎖的展示架，想說剛好可以練習一下做門鎖安裝孔的技巧，所以就接來做了。

不過做東西永遠都是這樣，不做不知道，知道不值錢！

原來做門常用的柳桉木跟橡木的硬度差那麼多，五金行用來開門鎖孔的開孔器並不適合鑽橡木這種木料。然後去建成問，又才知道原來取空刀與開孔器的差別。另外在這個 case中，透空刀完全不能用。雖然知道自己在這個領域還很菜，但刀具的種類還是多到我大開眼界。下一篇會另外整理一下我剛所認識的刀具。

不過這個case之中，練習最多的就是打鑿的運用，因為要做沉槽，所以如何打出一個漂亮的槽，真的徹底地練習了。

TO CAN Lead Straightener

Booster-machine launched the world's first TO-46(5, 6 pin) Lead Straightener, also has TO-56(4 pin) models.

In TO packaging process, the TO feet are usually retracted by many machine, But we still have to expanse and straight leads again and again. It’s waste your time and inconvenient to deal it.

Now, your company has a good assistant, TO CAN Lead Straightener, which could expanse and straight TO leads. After arranging leads, you can easily couple caper, or any other auto-feed measurement system tray. It spend less than 3 seconds (without manual loading time). Please watch the following Demo video.

TO46 5-pins Before Straighten

TO46 5-pins After Straighten

What is TO ? What is TO CAN Lead Straightener?

What is TO?

TO is the short called name of Transmitter Outline CAN, which is a package way for chip, also be known as coaxial package. In the fiber-optic communication industry, TO package is a common form. Espacially, TO46 and TO56 are most common used.

TO46

TO56

In appearance, TO46 and TO56 have a clear difference between outer diameter after cover sealing. TO46’s OD is 4.6mm, and TO56’s is 5.6mm.

Its internal structure is also different, in general, TO46 is suitable for Vertical-Cavity Surface-Emitting Laser (VCSEL) elements, TO56 is suitable for edge-emitting laser elements. In fiber-optic communications industry, TO typically has more than 4 pin feet(4,5,6). Their length and diameter are also different for later applications. Usually length is less than 15mm and diameter is less than Ø0.5mm.

What is the TO CAN Lead Straightener?

In fiber-optic communications industry, TO’s long leads are usually retracted in production process because the convenience of mechanical picking and placing. For example,

(1) Leads are inserted into taper holes fixtures, so that the feet are pressed as concentrically.
(2) TO chassis manufacturers have pinched pins before shipping to packaging factories.
(3) If packaging factories use advanced capping process, we have to straight leads before power-on for optical coupling.
(4) Final burn-in test, operators waste time to insert TO into burn-in board slots manually.
You need a lot of manpower to catch up with production rate.

Left: retracted, Right: after straighten

2014年9月20日星期六

生活 plus 3DP (Printer) -- 耳機收納

木工作品(5)：用餘料做淺盒 & 筆筒

最近把餘料整理了一下，有不少小塊小塊的東西，所以就把它們組合在一起做些盒子。順道再練練做榫頭的基本功。

第一個是之前用胡桃木做夜燈的餘料，其中有一片是邊料，有缺陷。所以我剛把好他當作淺盒的靠背，變成其花樣。另一塊中間已被挖空，就用那挖空來做前板的花樣。最後就湊成一組淺盒了！

2014年9月7日星期日

量測原理與機械工程實驗 (as a laboratory assistant)

Measurement and Mechanical Engineering Laboratory is a required course for junior students in the department of mechanical engineering at National Taiwan University. This course consists of miscellaneous topics of different fields such as material science, solid mechanics, thermal science, control, and fluid mechanics (see Fig. 1). Students can access equipment (or even build one on their own) which measures/demonstrates displacement, velocity, acceleration, force, torque, pressure, temperature, vibration, and other meaningful physical quantities.

開關參數設計 Analysis of Rocker switch's Parameters

搖擺式開關在生活幾乎無所不在了，小弟在碩班的時期曾經跟崧騰產學合作進行開關設計參數的探討。主要包括兩個內容：(1)尺寸對動態響應的影響，(2)電阻影響溫升的探討。

Rocker switches are common electro-mechanical components used to close or open electrical connections. Solteam Electronics Corporatoin, a famous electronics manufacturer in Taiwan, sought cooperation with mechanical engineering students at National Taiwan University in order to get more insights of the design parameters of a typical rocker switch MR22 (see Fig. 1). This project mainly focused on two subjects, the first was the effects of geometric parameters on mechanical performance indices like maximum force required and stroke length, the second one was the validation of a simplified mathematical model predicting electrical contact resistance and the equilibrium temperature.

Fig. 1 Partially sectioned model of rocker switch MR22

2014年7月17日星期四

ACF Bonding Tech

這是我在公司裡做的資料，沒有版權沒有保密，請大家儘量幫忙做廣告~~~
相關閱讀：ACF Bonding Machine
相關連結：布斯特機械

What is ACF ?

Anisotropic Conductive Film, ACF, is special materials in the fabric between the two substrates bonded. Characterized in that the electrode is connected by the conductive particles between the two substrates, such that the conductive Z-axis direction is better, but the XY direction of the conductive is insulation. So that the current can only flow from the conductive bonding direction (vertical direction), but also can avoid conduction between adjacent electrodes shorted.

異方性導電膠(Anisotropic Conductive Film；ACF)，是指在兩基材之間的佈貼合的特殊材料。其特點在於利用導電粒子連接IC晶片與基板兩者之間的電極，使得Z軸方向的導電性較好，但其XY方向的導電性卻接近絕緣。以致於電流只能從黏合方向(垂直方向)導通流動，但又同時能避免相鄰兩電極間導通短路。目前ACF常用到的例如軟式排線、Film On Glass(FOG)薄膜軟板╱玻璃貼合製程等。

ACF Bonding Tech

ACF bonding technology is the using of ACF, by hot pressing, to bond FPC on the LCD glass substrate. Integrated circuit align the tiny mark point on glass substrate, which requires a very precise positioning, so that a good connection of circuit.

ACF熱壓焊接技術是運用ACF（異方向性導電膜），通過預壓將IC或集成電路邦定(Bonding)在LCD玻璃基板上。通過對齊積體電路和玻璃基板上微小的mark點，這需要進行非常精確的定位，使線路很好的連通。