齒輪泵泵體工藝及加工φ14、2-m8孔夾具設(shè)計(jì)-在線瀏覽
2024-09-21 10:09本頁面
【正文】 rce has airoperated, the hydraulic pressure, the gas fluid union, the electricitytransmission and so on carries on using the engine bed movement to thework piece clamps. These ways have clamp the movement quickly, clampsthe strength to be stable, may reduce merit and so on worker laborintensity. This design selects the power unit which the electric motorachievement clamps, the utilization mechanical and electricaltransmission control loop control motor the reverse, is processed inorder to the control the work piece in to clamp concrete on addition, in the article has also carried on the simple precisionanalysis and the putation to the jig. On the machine parts often all has each kind of different use and thedifferent precision hole needs to process. In the machinefinishing,the hole process load accounts for the proportion to be bigger, drillbit, Expanding drilling, Reamer and so on decides the size cutting toolprocessing to occupy quite most. By now, besides had to guarantee thehole the size precision, but also had to achieve the hole the positionprecision request. In the single unit small volume production, afterdraws a line adjusts the hole spool thread position method processing,because the drill bit rigidity bad, is easier to distort, thereforethe production efficiency low also the precision is bad. Generally alluses the drilling machine jig in the volume production, the drillingmachine jig calls 鉆模, through drills the set of guidance cuttingtool to carry on the processing to be possible accurately to determinebetween the cutting tool and the work piece relative position, is鉆模main characteristic. Drills when truncates, is processed thehole the size and the precision mainly by the cutting tool itself sizeand the precision guaranteed。把工件迅速固定在正確位置上,完成切削加工、檢驗(yàn)、裝配、焊接和熱處理等工作所使用的工藝裝備稱為夾具。機(jī)床夾具是隨機(jī)械加工技術(shù)發(fā)展而發(fā)展的。隨著現(xiàn)在市場需要的多樣化、多品種、中小批量及短周期的生產(chǎn)方式在世界貿(mào)易中逐漸成為主導(dǎo)方式,傳統(tǒng)的專為某個(gè)零件的一道工序設(shè)計(jì)制造的專用夾具已經(jīng)不能適應(yīng)這種生產(chǎn)方式的要求。數(shù)控技術(shù)的進(jìn)步與發(fā)展,使得數(shù)控機(jī)床、加工中心在機(jī)械加工中廣泛運(yùn)用,數(shù)控機(jī)床夾具也迅速的發(fā)展起來。具體的發(fā)展方向有以下幾個(gè)方面:1) 功能柔性化。3) 制造精密化。5) 結(jié)構(gòu)標(biāo)準(zhǔn)化、模塊化。7) 機(jī)床夾具方面的基礎(chǔ)研究的強(qiáng)化。一般原則為：① 先粗后精。② 在各階段中，先加工基準(zhǔn)表面，然后以它定位加工其他表面。④ 先平面后孔。⑤ 除用為基準(zhǔn)的平面外，精度越高、粗糙度值越小的表面應(yīng)放在后面加工，以防劃傷。最終確定工藝如下:表13 單位:mm工序號工序內(nèi)容0鑄造、清砂、退火10粗銑、精銑I面20鉆、鉸6M8螺孔30銑N面40鏜孔、鏜孔并倒120角50鏜及面60粗車J面,粗車、精車K面、L面70鉆4孔80銑M面、P面90鉆孔及鉆、鉸2M8螺孔100鉆錐孔及鉆斜孔配作110去毛刺1最終檢查入庫 機(jī)械加工余量、工序尺寸及毛坯尺寸的確定 機(jī)械加工余量、毛坯尺寸齒輪泵零件材料為HT200,生產(chǎn)類型為大批生產(chǎn),采用機(jī)器砂箱鑄型。壁厚差異不能太大，以避免造成各部分因溫差懸殊而引起縮裂、縮孔與裂紋。消除殘余應(yīng)力后再送機(jī)械加工車間加工，否則工件將產(chǎn)生大的變形。而中間工序的尺寸則是零件圖的尺寸（最終工序尺寸），加上或減去工序的加工余量，即采用由后往前推的方法，由零件圖的尺寸，一直推算到毛坯尺寸。① 工序號10：粗銑、精銑I面 查[1]，查[1]835公差確定工序尺寸為，=查[1]835公差確定工序尺寸為mm②工序號20：鉆、鉸6M8螺孔查[1]，精絞為8H7③工序號30：銑N面查[1]，查[1]835公差確定工序尺寸為mm, =查[1]835公差確定工序尺寸為mm④工序號40：鏜孔、鏜孔并倒角查[1]，工序尺寸為16mm查[1]，查[1]，⑤鏜 查[1]，工序尺寸為56查[1]，⑥工序號60：粗車J面,粗車、精車K面、L面J面：查[1]，K面：查[1]，查[1]，工序尺寸為mmL面：查[1]， 查[1]，工序尺寸為25mm⑦工序號70：鉆4孔查[1]816鉆余量為0，工序尺寸為0⑧工序號80：銑M面、P面查[1]，⑨工序號90：鉆孔及鉆、鉸2M8螺孔鉆孔：查[1]816鉆余量為0，工序尺寸為0鉆、鉸2M8螺孔：查[1]，精絞為8H7⑩工序號100：鉆錐孔及鉆斜孔配作。 切削用量計(jì)算合理地選擇切削用量，對保證加工精度和表面質(zhì)量、提高生產(chǎn)率和刀具耐用度等，都有很大的影響。在這3個(gè)因素中，對刀具耐用度影響最大的是切削速度，其次是進(jìn)給量，而切削深度影響最小。因此，在粗加工階段，應(yīng)考慮選擇盡可能大的切削深度，其次是選擇較大的進(jìn)給量，最后確定一個(gè)合適的切削速度。在保證刀具耐用度的前提下，應(yīng)選取較高的切
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