液压泵盖工艺工装设计开题报告

欢迎下载本文档参考使用，如果有疑问或者需要CAD图纸的请联系q1484406321编号无锡太湖学院毕业设计（论文）相关资料题目： 液压泵盖工艺工装设计 信机 系 机械工程及自动化专业学 号： 0923172学生姓名： 王烨锋 指导教师： 鲍虹苏 （职称： 高工 ） （职称： ）2013年5月25日目 录一、毕业设计（论文）开题报告二、毕业设计（论文）外文资料翻译及原文三、学生“毕业论文（论文）计划、进度、检查及落实表”四、实习鉴定表无锡太湖学院毕业设计（论文）开题报告题目： 液压泵盖工艺工装设计 信机 系 机械工程及自动化 专业学 号： 0923172 学生姓名： 王烨锋 指导教师： 鲍虹苏（职称： 高工 ） （职称： ）2013年 11月12日 课题来源自拟题目科学依据（包括课题的科学意义；国内外研究概况、水平和发展趋势；应用前景等）（1）课题科学意义液压泵盖的机械加工工艺及普通夹具、液压设计为本课题的研究内容，对此研究查阅的大量的资料，首先明白机械加工工艺过程就是用切削的方法改变毛坯的形状、尺寸和材料的物理机械性质成为具有所需要的一定精度、粗糙度等的零件。为了能具体确切的说明过程，使工件能按照零件图的技术要求加工出来，就得制定复杂的机械加工工艺规程来作为生产的指导性技术文件，学习研究制定机械加工工艺规程的意义与作用以及普通夹具、液压夹具的设计就是本课题研究目的。（2）研究状况及其发展前景目前中国制造业发展迅猛，以前的我国制造业普遍使用刚性专机加工各种各样的零部件，导致改型和生产个零部件周期较长。随着我国制造业发展和各种各样零件的需求与日俱增，加工设备和工艺也向着柔性化的方向转变。加工装备的柔性概念和需求主要体现在对设备快速性和适应性的需求上，因此制造商不得不寻求柔性和产量之间的最佳组合。现在常采用研究传统切削加工机理的实验统计方 法来了解特种加工的工艺规律，以便实际应用，但还缺乏系统性。受其限制，目前特种加工 的工艺参数只能凭经验选取，还难以实现最优化和自动化。夹具是机械加工不可缺少的部件，在机床技术向高速、高效、精密、复合、智能、环保方向发展的带动下，夹具技术正朝着高精、高效、模块、组合、通用、经济的方向发展。其中液压夹具的主要优势是能节省夹紧和松卸工件时所花的大量的时间。有关统计资料表明液压夹紧相比机械夹紧节省90%95%的时间，缩小了生产循环周期，从而增加了产量也就意味着降低了成本。液压夹具系统的第二项重要特点是可实现非常高的定位精度。关键在于夹紧力在定位和夹紧过程中保持恒定不变。从而确保了同一道工序下的加工质量一致性。由于变形造成的废品率将会微乎其微。研究内容我们必须仔细了解零件结构，认真分析零件图,培养我们独立识图能力,增强我们对零件图的认识和了解,通过对零件图、三维图的绘制,还能增强我们的绘图能力和运用AutoCAD、PRO/E软件的能力。制订工艺规程、确定加工余量、工艺尺寸计算、工时定额计算、定位误差分析等。我们还必须考虑工件的安装和夹紧.安装的正确与否直接影响工件加工精度,安装是否方便和迅速,又会影响辅助时间的长短,从而影响生产率,夹具是加工工件时,为完成某道工序,用来正确迅速安装工件的装置。它对保证加工精度、提高生产率和减轻工人劳动量有很大作用。这是整个设计的重点,也是一个难点。拟采取的研究方法、技术路线、实验方案及可行性分析根据不同的研究对象拟采用不同的研究方法，本课题包括两方面内容：液压泵盖零件工艺及夹具设计。（1）制定工艺规程的研究途径和可行性分析：毛坯的选择；拟订工艺路线；计算切削用量、加工余量。（2）夹具设计的研究途径和可行性分析：夹具设计最关键是要求对工件定位正确，且满足定位精度要求。然后采取措施解决具体的问题。如定位基准与定位元件的配合状况和影响定位精度，那么可以提高夹具的制造精度，减小配合间隙就能提高夹具在机床上的定位精度。研究计划及预期成果研究计划：2012年11月12日-2012年12月25日：按照任务书要求查阅论文相关参考资料，填写毕业设计开题报告书。2013年1月11日-2013年3月5日：填写毕业实习报告。2013年3月8日-2013年3月14日：按照要求修改毕业设计开题报告。2013年3月15日-2013年3月21日：学习并翻译一篇与毕业设计相关的英文材料。2013年3月22日-2013年4月11日：液压泵盖零件工艺。2013年4月12日-2013年4月25日：两副夹具设计。2013年4月26日-2013年5月25日：毕业论文撰写和修改工作。预期成果：做好所要求的所有内容，包括液压泵盖零件工艺以及普通夹具、液压夹具设计，对机械制造工艺作更多的了解，也可以巩固大学所学到关于机械的知识，同时也可以巩固自己的CAD画图，学校PRO/E画图，希望以后对自己工作有用。特色或创新之处选择了最好的零件加工工序，夹具设计也具针对性，对工件生产更有帮助。巩固了AutoCAD画图，同时也学会了PRO/E的基本操作。已具备的条件和尚需解决的问题液压泵盖零件的工艺思路明确，夹具的设计也得当。 液压这块还需作更多的了解，PRO/E软件用的不熟悉。指导教师意见 指导教师签名：年 月 日教研室（学科组、研究所）意见 教研室主任签名： 年 月 日系意见 主管领导签名： 年 月 日英文原文CNC Machining Process First, our countrys history of the development of numerical control system 1. Our country since 1958, by a group of research institutes, colleges and universities and a few started to CNC Machine Tool Plant of the research and development system. At that time, due to the low level of domestic electronic components, such as the department of economic constraints, lack of a larger development. 2. In the reform and opening up, Chinas numerical control technology gradually achieve substantial development. After 65 (81 - 85 years) the introduction of foreign technology, 75 (86 - 90 years) of the digestion and absorption and the Eighth Five-Year Plan (91 1 -95 years) National Organization of scientific and technological, that makes our countrys CNC technology has a qualitative leap in acceptance at that time, through research and identification of country products including Beijing Everests Chinese I, central Chinas central NC I and a few high-end Shenyang National Engineering Research Center for Control of Blue-I, as well as other through the National Quality Supervision and Test Center machine test NC system of qualified domestic companies such as Nanjing, four products. 3. Chinas CNC machine tool manufacturing industry in the 80s had the stage of rapid development, many machine tool plant products from traditional products to the NC transition. But, generally speaking, the technological level is not high, the quality of the poor, so in the early 90s facing the countrys economy from a planned economy to a market economy and adjust the transfer went through the most difficult years of the Depression period, the production capacity at that time down to 50 %, more than four month inventory. From 1995, Ninth Five-Year Plan to expand domestic demand from the country after the machine tool market to start, so as to reinforce the approval of imports of CNC equipment, investment focused on support for key numerical control system, equipment, technologies of CNC equipment has played a significant role, especially in 1999, the countrys defense industry to civilian industry and the key to putting in a lot of technical department funds, to enable CNC equipment manufacturer market thriving. Three, CNC Technology and Equipment of cars cut CNC Lathe Machining Lathe technology and processing technology similar to, but because of CNC lathe is a fixture, for automatic processing of all finish turning process, which should pay attention to the following aspects.1. A reasonable selection cutting for the high-efficiency metal-cutting processing, the processed materials, cutting tools, cutting conditions is the three major elements. These determine the processing time, tool life and processing quality. Cost-effective processing methods must be a reasonable choice of the cutting conditions. Three elements of cutting conditions: cutting speed, feed rate and cutting depth of the damage directly caused by the tool. With the increase in cutting speed, tool tip temperature will rise; will have mechanical, chemical, thermal wear and tear. 20% increase in cutting speed; tool life will reduce the 1 / 2. Feed conditions and the relationship between tool wear and tear at the back of a very small area of. However, the feed rate, cutting temperature rise, wear big behind. Than the impact of cutting speed on tool small. Depth of cut on the tools did not affect the cutting speed and feed rate, but at small cutting depth of cut when cutting materials have been hardened layer, which will affect the tool life. The user is processed according to the material, hardness, cutting status, material type, feed rate, cutting depth, such as the option of using the cutting speed. The most appropriate selections of processing conditions are at the basis of these factors is selected. Have rules, stability, worn and tear is to achieve the ideal conditions for life. However, in actual operation, the selection tool life and tool wear, the size of changes in processing, surface quality, cutting noise, heat processing and so on. In determining the processing conditions required to study the actual situation. The heat-resistant alloys such as stainless steel and hard materials, the coolant can be used best to use rigid blade. 2. Reasonable selection tool 1) when rough, it is necessary to choose high strength, good durability tool, in order to meet the rough knife when eating large back volume, the feed requirements. 2) Fine car, it is necessary to choose high precision, durability good tool to ensure that the requirements of machining accuracy. 3) In order to reduce tool change time and convenience of the knife should be used machines and machine folder knife blade. 3. A reasonable selection Fixture 1) General selection try the work piece clamping fixture to avoid the use of a dedicated fixture; 2) positioning the base parts overlap so as to reduce the positioning error. 4. To determine the processing route processing route is the index-controlled machining process, tool parts relative trajectory and direction of Sports. 1) Should be able to ensure the machining accuracy and surface roughness requirements; 2) should try to shorten the processing route, reducing travel time and air knives. 5. Processing route of contact with allowance At present, CNC lathes have not yet achieved the universal access to conditions, the general should be put on too much rough margin, especially with forging, casting hard cushion cortex in general lathe processing. Must be such as CNC lathe, the need to pay attention to process flexibility. 6. Fixture to install the main points at present, the hydraulic clamping chuck and hydraulic cylinder are connected by the rod of the implementation, in Figure 1. Hydraulic clamping chuck as follows: First of all, by moving on hand to unload the nut hydraulic cylinder, the discharge of SLIDE, and back-end from the spindle out, and then move the hands to unload screw chuck can be disposed of under the chuck. Four, effectively turning a reasonable Save processing time Index Turning Centers G200 integrated processing unit with a modular, high-power two-axis linkage axis function, thus further shortening the processing time. With other means of job-axis opposite to the concept of clamping, the use of the product can be integrated intelligent processing unit in place so that the work piece clamping and automatic processing. In other words, the automatic setup will not be affected by the processing of another axis, a feature that can be shortened about 10% of the processing time. In addition, the Four processing very quickly, you can simultaneously have two processing tool. When the machine is put into use in pairs, the efficiency becomes more apparent. In other words, the conventional hard turning and setting two cars can parallel machine. Turning conventional vehicles and hardware differences between the tool and focused only in the coolant system thermostat. However, conventional processing is different: both can be used conventional processing and a tool carrier for processing Tailstock; and hardware when using a tool only. In both types of machine tools can be carried out on the hard dry processing, only the manufacturers technology program designed to balance the need to beat time, and Index of the module structure of machine tools to provide them with greater flexibility. To improve the productivity of high-precision with the continuous improvement of production efficiency, the user also made for a very high accuracy requirements. Turning Center G200 used for processing, the cold start up to four parts processing required to achieve tolerances of 6mm. Processing process, the accuracy is usually maintained at 2mm. Index so made available to the companys clients are high-precision, high efficiency, the integrity of the program, and programs to provide such high precision, requiring careful choice of spindle, bearings and other features. G200 Turning Center Landshut, Germany, BMW car factory in the application of the company achieved good results. The plant is not only the production of engines, but also by the production of cast light metal parts, plastic decorative items inside the vehicle and steering axis. Consider the quality of supervisory staff, and its very precise machining accuracy: tolerance bands for 15mm, for bearing tolerance 6.5mm. In addition, the processing of the universal joints of the Index companies use automatic intelligent processing unit. The first two parts are used for turning centers before playing pre-processing, post-processing line measurement, and then sent through the conveyor belt for hobbling, cleaning and quenching treatment. The last process using the second processing system Index. G200 Turning Center by two steering knuckle on the car bearing hard. In the machine tool to complete the online survey, then to the discharge unit. Processing unit fully integrated into the layout of the workshop, and in line with ergonomic requirements, covers an area of greatly reduced, and only two staff members to the custody of manufacturing cells. Friday, CNC turning and G00 in the magical effect of the skills to ensure dimensional accuracy CNC turning processing technology has been widely used in mechanical manufacturing industry, how efficient, reasonable, and completed by the quality of the work piece by the amount of processing, each engaged in the trade of engineering and technical personnel more or less have their own experience. I engaged in CNC teaching, training and processing for many years, accumulated a certain amount of experience and skills, is to CNC Equipment Factory Guangzhou GSK980T series of machine tool production, for example, introduce a few skills in CNC turning. First, the program first sentence skills G00 We now have access to textbooks and CNC turning technical books, procedures are set up the first sentence of work piece coordinate system, that is, G50 X Z in the first sentence as a process. According to the directive, a coordinate system can be set so that the tool at a point in this coordinate system as coordinates (X Z) (In this paper, the origin of work piece coordinate system are set at the right end of the work piece surface). Programming using this method, the knife, the knife must be moved to the established position of G50 can be set for processing, identify the location of the process is as follows. 1. of a knife, the rough work piece clamping good; 2. Spindle is to hand round the base right side knife flat work piece surface A; 3. Z-axis fixed, the release of the tool along the X axis points to C, type G50 Z0, the point of computer memory; 4. Program entry mode, type G01 W-8 F50, turning out to be one step work piece; 5. X-axis fixed, the release of the tool along the Z-axis points to C, stop turning out measuring the diameter of the work piece level , the importation of G50 X, computer memory that point; 6. Program entry mode, enter the G00 X Z, programming tool runs the specified procedure to the starting point, and then enter the G50 X Z, procedures for the origin of the computer memory. The above-mentioned steps, the steps that the tool 6 at XZ Office location is essential; otherwise, the work piece coordinate system will be modified, not the normal processing of the work piece. Processing has been the experience of the people all know that the above position will be the tool to the cumbersome process of XZ Department, in the event of an accident, X or Z-axis without servo, tracking error, power outages happen, etc., the system can restart, after restart system loss of G50 work piece coordinate values set by the memory, reset back to zero run is no longer working, will need to re-run the tool and reset to XZ location G50. If it is production, processing, after the End of a return to the starting point for continued processing under the G50 is, in the process some errors on the work piece coordinate system may be modified. In view of the first sentence of the above procedures using G50 work piece coordinate system set up many defects, I will want to approach the work piece coordinate system fixed on the machine will process the first sentence changed to G50 XZ after G00 X Z, problem solved. The course of its operation only to find G50 using the above-mentioned five-step process before, that is, 1,2,3,4,5 steps to achieve, it will run the tool to a safe location, out of process, and can run automatically. Even if power outages and other unforeseen circumstances occur, restart the system, in the Edit mode to move the cursor without affecting the safe processing of the work piece processing process program segment, according to automate the processing can continue. First sentence of the above procedure to replace G50 with G00 is the substance of the work piece coordinate system fixed on the machine, no longer limited to the origin G50 X Z process constraints, without changing the work piece coordinate system, easy operation, reliability, and received an unexpected effect. Chinese metal processing online Second, control of dimensional accuracy skills 1. To amend the value of a knife up to ensure dimensional accuracy First on the knife because of error or other causes beyond the work piece work piece error tolerance, can not meet the processing requirements, can be added by modifying the knife so that the work piece size to meet the requirement to ensure that the radial dimensions are as follows: a. absolute coordinate input method According to the big decrease, a small increase principle, a knife up at 001 004 modified. Such as cut off on the 2nd slot at a big size work piece 0.1mm, and 002 showed up knives are X3.8, may enter the X3.7, to reduce the knife on the 2nd meeting. b. the relative coordinate method as in the previous case, enter 002 knife fill U-0.1, also the same result. Similarly, the axial size of the control also and so on. Such as cylindrical with a knife on the 1st axis somewhere above processing, size, long 0.1mm, can be completed at 001 knife enter W0.1. 2. Semi-finishing to ensure that the impact of the elimination of screw gap dimensional accuracy For the majority of CNC lathe using a longer time, because of the effects of screw space and processing of the work piece dimensions are often unstable situation. At this time, we can rough after finishing a half-space to eliminate the effects of screw. 1, such as a knife with G71 cylindrical rough, you can fill in the 001 knife enter U0.3, call the G70 a fine car, parking measurements, and then fill in the 001 knife enter U-0.3, once again calling a G70 Finish . Finish a half after this time, eliminating the effects of screw clearance to ensure the stability of the dimensional accuracy. 3. To ensure dimensional accuracy Programmer a. to ensure dimensional accuracy absolute programming there is an absolute and relative programming. Programming refers to the relative curve in the processing, the location of