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摘 要
在機(jī)床上加工工件時(shí),定位和夾緊的全過程稱為“安裝”。在機(jī)床上用來完成工件安裝任務(wù)的重要工藝裝備,就是各類夾具中應(yīng)用最為廣泛的“機(jī)床夾具”。
機(jī)床夾具的種類很多,其中,使用范圍最廣的通用夾具,規(guī)格尺寸多已標(biāo)準(zhǔn)化,并且有專業(yè)的工廠進(jìn)行生產(chǎn)。而廣泛用于批量生產(chǎn),專為某工件加工工序服務(wù)的專用夾具,則需要各制造廠根據(jù)工件加工工藝自行設(shè)計(jì)制造。本設(shè)計(jì)的主要內(nèi)容是設(shè)計(jì)鉆床夾具,需要對(duì)泵體上表面4xM6的四個(gè)螺紋孔進(jìn)行鉆削。
泵體零件上往往都有各種不同用途和不同精度的孔需要加工。在機(jī)械加工中,孔的加工量所占比例較大,其中鉆頭、擴(kuò)孔鉆、鉸刀、鏜刀等定尺寸刀具加工占相當(dāng)多數(shù)。這時(shí),除了要保證孔的尺寸精度外,還要達(dá)到孔的位置精度要求。在單件小批量生產(chǎn)中,用劃線后找正孔軸線位置方法加工。在批量生產(chǎn)中一般都采用鉆床夾具與鏜床夾具,鉆床夾具又稱鉆模,鏜床夾具又稱鏜模,通過鉆套、鏜套引導(dǎo)刀具進(jìn)行加工可準(zhǔn)確地確定刀具與工件之間的相對(duì)位置。
關(guān)鍵詞: 通用夾具; 專用夾具; 鉆床夾具; 泵體
Abstract
In the machine machining, positioning and clamping process called "installation". The machine used to complete the task of workpiece installation of process equipment, is an important fixture in the most widely used "the machine tool's fixture.
There are many kinds of the machine tool's fixture, among them, use the widest range of general fixture, size, and there has been more standardized professional factory production. And widely used in mass production, designed for a workpiece machining processes and special fixture service to the factory according to the workpiece machining process to design and manufacture. The design of the main content is boring and milling machine fixture design jigs, need to pump body surface 4xM6 of the four threaded hole for drilling.
Pump body parts are usually different purposes and accuracy of the hole machining. In machining, the hole of manufactured, among which the proportion of drilling, reaming, reamer, boring tools for size of such a sizable majority. At this time, except to ensure the accuracy of the size of the hole hole, but also achieve the position precision requirements. In single small batch production, use crossed for positive hole axis position after processing methods. In batch production in general by drilling and boring fixture, drilling fixture and diamond fixture, boring fixture and say, boring, boring set by drilling tools for processing guide can accurately determine tool and the relative position between the workpiece.
Key word: General fixture; Special jig ;Drilling fixture; Pump body
目錄
摘 要 III
Abstract IV
目錄 V
1 緒論 1
1.1 課題的背景和意義 1
1.2 機(jī)床夾具概述 1
1.2.1 機(jī)床夾具 1
1.2.2 機(jī)床夾具的功能 1
1.2.3 機(jī)床夾具在機(jī)械加工中的作用 2
1.2.4 機(jī)床夾具的發(fā)展趨勢 2
2 水泵泵體的工藝規(guī)程設(shè)計(jì) 4
2.1 零件的作用 4
2.2 零件圖的審核 4
2.2.1 分析零件圖 4
2.2.2 零件的結(jié)構(gòu)工藝性分析 5
2.3 生產(chǎn)過程和工藝過程 5
2.3.1 生產(chǎn)過程 5
2.3.2 工藝過程 6
2.4 工藝規(guī)程 7
2.5 零件的工藝分析 7
2.6 選擇毛坯 8
2.7 坯料尺寸公差與機(jī)械加工余量的確定 8
2.8 確定毛坯尺寸 8
2.9 孔和平面加工分析 8
2.9.1 孔和平面的加工順序 8
2.9.2 鉆孔加工方案選擇 8
2.9.3 選擇定位基準(zhǔn) 9
2.10 基面的選擇 10
2.11 零件表面加工方法選擇 10
2.12 各工序間加工余量 11
2.13 制定工藝路線 12
2.14 切削用量的計(jì)算 13
2.14.1 銑上平面工序切削用量的計(jì)算 14
2.14.2 銑下平面工序切削用量的計(jì)算 14
2.14.3 銑左端面工序切削用量的計(jì)算 15
2.14.4 銑右端面工序切削用量的計(jì)算 15
2.14.5 鉆?48孔工步切削用量的計(jì)算 16
2.14.6 加工M10螺紋的切削用量 16
2.14.7 加工M8螺紋的切削用量 17
2.14.8 加工M11.3螺紋的切削用量 18
2.14.9 法蘭端面凸臺(tái)切削用量 19
2.14.10 精車軸承內(nèi)孔切削用量 19
2.14.11 鉆?10孔的切削用量 20
2.14.12 左端面倒角的切削用量 20
2.15 機(jī)械加工時(shí)間定額的確定(參考機(jī)械加工工藝手冊(cè)) 20
2.15.1 機(jī)械加工時(shí)間定額的組成 20
2.15.2 機(jī)械加工時(shí)間定額的計(jì)算 20
2.15.3 上平面時(shí)間定額的計(jì)算 21
2.15.4 下平面時(shí)間定額的計(jì)算 22
2.15.5 左端面時(shí)間定額的計(jì)算 23
2.15.6 右端面時(shí)間定額的計(jì)算 24
2.15.7 孔?48的時(shí)間定額 25
2.15.8 上平面螺紋孔的時(shí)間定額 26
2.15.9 左端面?10通孔的時(shí)間定額 27
2.15.10 下平面英制管螺紋的時(shí)間定額 28
2.15.11 右端面螺紋孔的時(shí)間定額 29
2.15.12 左端凸臺(tái)銑平面的時(shí)間定額 30
2.15.13 精車軸承內(nèi)孔的時(shí)間定額 31
2.15.14 車左端面倒角的時(shí)間定額 32
3 夾具設(shè)計(jì) 33
3.1 對(duì)專用夾具的基本要求 33
3.2 專用夾具設(shè)計(jì)步驟 33
3.3 鉆螺紋孔2xM10攻螺紋夾具設(shè)計(jì) 34
3.3.1 問題的提出 34
3.3.2 夾具設(shè)計(jì) 34
3.3.3 夾具設(shè)計(jì)及操作的簡要說明 36
4結(jié)論與展望 37
4.1 結(jié)論 37
4.2 不足之處及未來展望 37
致謝 38
參考文獻(xiàn) 39