1、LAPPING 折疊See following pictures as examples for lapping看下述折疊圖片.Not OKNot OKLapp ing in threadLapp ing螺紋折疊折疊Not OKNot OKLapp ing in threadMaterialfolds or cracks in the thread profileLapp ing un der microsocope after grinding在螺紋輪廓上有材料折疊及裂紋金相顯微鏡下剖開后的螺紋折疊Reas ons for lapp ing折疊原因1. Pitch is not adjust

2、ed correctly = matchi ng betwee n movi ng (lo ng) and stati onary (short) thread ing die (see picture 1)螺紋線未正確調整=動靜搓絲板未匹配(見圖片一)2. To much pressure on bolt when placed between the threading dies (at the begi nning of the threadi ng stati on). Whe n the pressure on the bolt betwee n the two thread ing

3、 dies is to HIGH, the bolt will start to slip in stead of rotate. When the bolt begins to slip you will have lapping. (threading dies are positi oned to close to each other)將工件置于兩搓絲板間時壓力過大(開始加工螺紋時).當壓力過大時螺栓 開始滑移而非旋轉.當螺栓開始滑移時就產生了折疊.(兩搓絲板間距離太 近)3. 1and 2 can also be caused if there is variation in the

4、 shank diameter betweendifferent lots/containers with the same part = when the bolt is headed in one machine and rolled in a separated thread roller. It is better to roll thread in a boltmaker so you are certa in that the bla nk diameter does not va如果不同 批的零件同一部分螺紋坯徑不均勻也會引起序號1及2描述中所產生的折疊=盡可能在同一臺設備上鐓制

5、并且在一個單獨的螺紋設備上加工.由一臺設備加工成形(帶螺紋)會更好些.這樣會確保螺紋坯徑不會有變差.4. Not eno ugh pressure on the bolt whe n placed betwee n the threadi ng dies, whe n the pressure on the bolt betwee n the two thread ing dies is to LOW the bolt can be introduced to far between the threading dies (threading dies are positioned to fa

6、r from each other加工螺紋時壓力不足.其產生原因是兩搓 絲板距離過遠時.5. In correct in troductio n (to late or to early) because the in troductio n fin ger is not correct (to long or to short, wrong profile).不正確的引入(過遲或過早) 是因為送料板過長，過短，錯誤的形狀.6. Timi ng of the in troductio n fin ger in relatio n to the moveme nt of the threadi

7、ng dies is not correct (to late or to early送 料時間與搓絲板的運動時 間(過早過晚)不匹配.7. The bla nk is coni cal and therefore not in troduced straight betwee n the threadi ng dies螺紋坯徑是錐形時引起工件不能直接引入到搓絲板間8. The blank is not straight and therefore not introduced straight between the threadi ng dies毛坯桿彎會引起工件不能直接引入到搓絲板間.I

8、nspection for lapping 折疊檢測For in specti on for lapp ing we take 3 bolts, degrease them and place them for 1 minute in HCL (acid) with 16 % concentration and temp of 80 C. Then rinse with water and dry with compressed air. Check the thread on each bolt un der a烹認儀低秦耆，丸囲取腳可刪蹤microscope for lapping and cracks檢測螺紋時，我們拿3個螺栓，脫脂除油后 將它們在濃度為16%,溫度為80度的鹽酸溶液中放置一分鐘然后用清水沖 洗干凈并用壓縮空氣吹干在金相顯微鏡下檢驗螺紋折疊及裂紋PICTURE 1 (adjustme