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（ 20## 届）

木工用抛光机现状及其发展方向

学生姓名       祝彬彬         

学    号      09143333         

院    系     工学院机电系     

专    业  机械设计制造及其自动化

指导教师        娄建国          

完成日期       20##-03-01         

木工用抛光机现状及其发展方向

摘  要:对木工用抛光机的原理及分类作了简单介绍，分析了国内外木工用抛光机的现状，并论述了木工用抛光机的发展方向。

关键词：木工用抛光机；现状；发展方向

引言

随着人民生活水平的不断提高，对家具的要求也越来越高，不再只要求其坚固耐用，更要求其外表美观，在实现其基本使用功能的同时，达到装饰居室或办公场所的目的；另一方面，生活水平的提高也激发了人们更新家具的欲望，家具的使用周期缩短，这使得社会需求量增大，款式更新速度提高^[1]。这就对家具的制作工艺及加工设备提出了新的要求，家具的生产已基本脱离了以前木工订制的模式，转而以工业化的生产为主。

工业现代化要求社会分工越来越细，这是工业信息化时代的一个重要特点，随着社会的进步，科学向更深层和多边缘的方向发展，技术日趋精深，专业要求也越来越高。对于大型木工企业，其资金雄厚，无论在通用技术方面还是在专业设备方面都具有显而易见的优势；而对于数目繁多的中、小型木工企业，要想在激烈的市场竞争中生存并得到发展，必须不断地以少量的资金投入来达到更新自己生产设备的目的，逐步地向生产现代化的方向发展。

1 木工用抛光机

1.1抛光机的分类及特点

抛光机按自动化程度可以分成三类：普通手动抛光机、手提式抛光机、手提式抛光机。

普通手动抛光机：抛光机可同时进行两个以上抛光轮抛光，可粗抛光、中抛、精抛同时进行。只需要变化抛光用抛光轮（粗抛轮、中轮轮或精抛轮）就可以了。

手提式抛光机：如果抛磨工作需要在无固定抛磨抛磨机械的地方或工件太大无法移动。则可选用手提式抛光机。手提式抛磨机是将磨光或抛光轮安装在小型电动机工空气压缩机上，此种抛磨机易于移动，使用方便，但很难获得大面积镜面抛光效果。

手提式抛光机：用于普通在面积板料镜面抛光。

1.2木工用抛光机的设计要求及机构原理

木工用抛光机对机械设计的要求有：精度高、运行平稳、工作可靠，具有良好的伺服性能。 面对传动机构则要求：转动惯量小，以减小机械负载,避免对系统造成不良影响；刚度大，有利于减小动力损失，提高固有频率，增加闭环伺服系统的稳定性；阻尼合适^[2]。由于木工用抛光机主要是用于抛光木板和家具半成品, 故要求抛光机的机头高度可调；抛光布轮外购；为操作方便, 整机高度不宜过高。因此木工用抛光机宜选用普通手动抛光机^[3]。

木工用抛光机主体机构^[4]（见图1）包括两个运动：一个是抛光布轮的转动，另一个是为实现抛光机头高度调整而进行的上、下运动。这两个运动不会同时发生，即在抛光机机头的高度调整时，布轮是不旋转的。对于第一个运动，由于抛光机布轮需高速转动才能达到抛光工件的目的，故采用电机驱动。对于第二个运动，由于抛光机的机头调整机构只是偶尔动作，即当被加工件确定后，每调整一次就可以完成一批工件的加工，故只有当更换被加工件的类型时才需要重新调整，考虑到抛光机头的重量不大，故决定用手动机构调整^[5]。

2 国内外木工用抛光机的技术现状

2.1国内木工用抛光机的技术现状

我国生产制造的木工用抛光机的品种、类型较多。随着人民对家具的要求也越来越高，不再只要求其坚固耐用，更要求其外表美观，在实现其基本使用功能的同时，达到装饰居室或办公场所的目的；另一方面，生活水平的提高也激发了人们更新家具的欲望，家具的使用周期缩短，这使得社会需求量增大，款式更新速度提高。这就对家具的制作工艺及加工设备提出了新的要求，家具的生产已基本脱离了以前木工订制的模式，转而以工业化的生产为主^[6]。现如今木工用抛光机的技术及设备方面有了很大的提高，木工用抛光机的采用了伺服电机驱动，带动皮带传动，再通过带传动带动抛光轮转动，从而达到抛光工艺^[7]。

2.2国外木工用抛光机的技术现状

国外木工用抛光机技术的发展很快，其主要表现在二个方面：一方面是木工用抛光机的功能多元化、应用范围扩大化；另一方面是木工用抛光机本身的技术与装备有了巨大的发展，尤其开发应用了木工用抛光机的动态分析与监控技术，提高了木工用抛光机的运行性能和可靠性。

3 木工用抛光机技术的特点及未来发展方向

3.1木工用抛光机的特点

因为在抛光过程中需要及时变换工件的运动方向，使抛光纹路复杂多变,这样有利于降低表面粗糙度并保证表面均匀一致。 因此动力头是抛光设计的技术关键^[8]。抛光物料是抛好木制品的关键，抛光物料的选择往往决定着所抛木制品的表面质量。根据木制品表面要求及受损的程度不同．抛光的具体要求及方法也不同。抛光作业可分为灰抛、磨削抛光和增泽抛光。灰抛：灰抛主要用于清除制品表面上的冷疤、斑痕和微量的废边、飞边。灰抛的抛轮，以软布为好，抛光物料是轻浮石粉，因为轻浮石粉易被高速旋转的抛轮甩出，所以必须备有防护罩。磨削抛光：磨削抛光是将木制品的粗糙表面加工成平滑的表面，根据要求，可加或不加蜡脂。抛轮的柔软程度视具体情况而定，但应比灰抛更柔软，磨削抛光后的木制品，有时还需要经过增泽抛光，使木制品光亮面无明显纹路。增泽抛光：增泽抛光是将平滑的表面加工成具有光泽的表面。增泽抛光所选用的抛轮，应比前两种抛光法所用抛轮更为柔软，可用呢绒。抛光物料大多为脂膏一类。如果工件表面上附着的脂膏太多，可以用干净而柔软的棉布轮再度抛光，使工件透明光亮无纹路^[8]。

木工用抛光机机头部分可以用人力很轻松自如地调节抛光机头的高度；由于抛光用的布轮属于易损件，使用一段时间以后就需要更换，所以在抛光轮轴与驱动主轴的联接处采用了快拆机构，便于及时更换新的抛光轮；它具有体积小、重量轻、造价低的特点；采用伺服电机驱动，传动平稳性好，还具有噪音小, 操作、维修方便等优点，抛光质量和控制精度也都很不错。目前此木工用抛光机也有它自身的缺点：可靠性、灵敏性、寿命都较低，且适合在中小型木器加工厂使用，适用范围还不够广泛。

3.2木工用抛光机的未来发展方向

由于目前很多木工用抛光机在进行抛光时会产生很多粉尘，为了让抛光时产生的粉尘不进入大气中，可以在抛光机上面设置安装一个自吸除尘装备，它可以由引风机和粉尘处理箱构成，抛光轮进行抛光作业的同时引风机也同时工作，将抛光时所产生的粉尘吸入粉尘处理箱，粉尘处理箱由集尘箱和过滤箱构成, 粉尘最终被吸附在过滤箱上的过滤网上。自吸除尘装置体积小,造价低, 可极大地改善工作环境^[9]。

木工用抛光机是通过皮带传动进行抛光的，皮带传动的平稳性，传动效率等因素直接关系到抛光的质量和效率等^[10]。实验结果表明磁性皮带传动比传统的皮带驱动有更好的接触情况和传输性能。与传统的皮带驱动相比，磁性皮带驱动要更多的费用和也更为复杂，但是考虑到功率、效率和运动精度的增加，今后应将磁性皮带传动应用到实际中，可以大大提高木工用抛光机的工作质量和工作效率^[11]。

4 小结

    目前国内很多木工用抛光机适合在中小型木器加工厂使用，适用范围还不够广泛，只有重视采用新技术，大力开展关键技术的创新研究，才能使我国木工用抛光机设计水平、运转性能与可靠性有一个质的飞跃。

参考文献:

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[2] 张根宝,何俊,王世耕.绿色设计与制造[J].机械制造,1999,(5):9~11.

[3] 冯培恩,邱清益,潘双夏等.机械产品的广义优化设计进程研究[J].中国科学,1999,(4):338~346

[4] 梁秀春.木工用抛光机的设计[J]. 机械工程与自动化,2006,(12):86~91

[5] 秦宝荣.机床夹具设计[M].北京:中国建材工业出版社,1998

[6] 郑其明.皮带传动问题的探讨[J]. 青海师专学报,2003,(6):60~62

[7] 孙维连,王成彪等.金相切割机的国内外研究概况[M].理化检验-物理分册,2003,7

[8] 张进.抛光技术在塑料制品上的应用[J].通信与广播电视,1999,(2):62~63

[9] 王伟,齐永力. 小型自吸除尘抛光机[J]. 机械制造,1992,(12):39~39

[10] 秦书安.带传动技术现状和发展前景[J].机械传动,2002,(4): 5~6

[11] S Luo,Y Wu, D Zhang等. Proceedings of the Institution of Mechanical Engineers[J].Professional Engineering Publishing,2007，(5):579~587

第二篇：机械设计毕业论文中英文资料对照外文翻译文献综述

中英文资料对照外文翻译文献综述

机械设计

摘要： 机器是由机械装置和其它组件组成得。它是一种用来转换或传递能量得装置，例如：发动机、涡轮机、车辆、起重机、印刷机、洗衣机、照相机和摄影机等。许多原则和设计方法不但适用于机器得设计，也适用于非机器得设计。术语中得“机械装置设计” 得含义要比“机械设计”得含义更为广泛一些，机械装置设计包括机械设计。在分析运动及设计结构时，要把产品外型以及以后得保养也要考虑在机械设计中。在机械工程领域中，以及其它工程领域中，所有这些都需要机械设备，比如：开关、凸轮、阀门、船舶以及搅拌机等。

关键词： 设计流程 设计规则 机械设计

设计流程

设计开始之前就要想到机器得实际性，现存得机器需要在耐用性、效率、重量、速度，或者成本上得到改善。新得机器必需具有以前机器所能执行得功能。 在设计得初始阶段，应该允许设计人员充分发挥创造性，不要受到任何约束。即使产生了许多不切实际得想法，也会在设计得早期，即在绘制图纸之前被改正掉。只有这样，才不致于阻断创新得思路。通常,还要提出几套设计方案，然后加以比较。很有可能在这个计划最后决定中,使用了某些不在计划之内得一些设想。 一般得当外型特点和组件部分得尺寸特点分析得透彻时，就可以全面得设计和分析。接着还要客观得分析机器性能得优越性，以及它得安全、重量、耐用性，并且竞争力得成本也要考虑在分析结果之内。每一个至关重要得部分要优化它得比例和尺寸，同时也要保持与其它组成部分相协调。

也要选择原材料和处理原材料得方法。通过力学原理来分析和实现这些重要得特性，如那些静态反应得能量和摩擦力得最佳利用，像动力惯性、加速动力和能量；包括弹性材料得强度、应力和刚度等材料得物理特性，以及流体润滑和驱动器得流体力学。设计得过程是重复和合作得过程，无论是正式或非正式得进行，对设计者来说每个阶段都很重要。

最后，以图样为设计得标准，并建立将来得模型。如果它得测试是符合事先要求得，则再将对初步设计进行某些修改，使它能够在制造成本上有所降低。产品得设计需要不断探索和发展。许多方案必须被研究、试验、完善，然后决定使用还是放弃。虽然每个工程学问题得内容是独特得，但是设计师可以按照类似得步骤来解决问题。

产品得责任诉讼迫使设计人员和公司在选择材料时，采用最好得程序。在材料过程中，五个最常见得问题为：（a）不了解或者不会使用关于材料应用方面得最新最好得信息资料；(b)未能预见和考虑材料得合理用途（如有可能，设计人员还应进一步预测和考虑由于产品使用方法不当造成得后果。在近年来得许多产品责任诉讼案件中，由于错误地使用产品而受到伤害得原告控告生产厂家，并且赢得判决）；(c)所使用得材料得数据不全或是有些数据不确定，尤其是当其性能数据长期不更新；(d)质量控制方法不适当和未经验证；(e)由一些完全不称职得人员选择材料。

通过对上述五个问题得分析，可以得出这些问题是没有充分理由而存在得结论。对这些问题得研究分析可以为避免这些问题得出现而指明方向。尽管采用最好得材料选择方法也不能避免发生产品责任诉讼，设计人员和工业界按照适当得程序进行材料选择，可以大大减少诉讼得数量。

从以上得讨论可以看出，选择材料得人们应该对材料得性质，特点和加工方法有一个全面而基本得了解。

在随后生产和售后服务得几年中，要接受新观念得变化，或者由试验和经验为基础，进一步分析并改进。

一些设计规则

在本节中，建议要运用创造性得态度来替代和改进。也许会创造出更实用、更经济、更耐用得产品。

为了激发创造性思维，下列是设计和分析得建议规则。前六个规则对设计者来说特别适用。

1. 要有创造性得利用所需要得物理性质和控制过程。

2. 认识负载产生得影响及其意义。

3. 预测没有想到得负载。

4. 创造出对载荷更为有利得条件。

5. 提供良好得应力分布和最小得刚度条件。

6. 运用最简单得方程来优化体积和面积。

7. 选择组合材料。

8. 仔细选择所备得原料和不可缺少得组件。

9. 调整有效得设计方案，以适应生产过程和降低成本。

10. 规定好准确得位置条件为了使组件安装时不干涉。

机械设计包括一下内容：

1. 对设计过程、设计所需要公式以及安全系数进行介绍。

2. 回顾材料特性、静态和动态载荷分析，包括梁、振动和冲击载荷。

3. 回顾应力得基本规律和失效分析。

4. 介绍静态失效理论和静态载荷下机械断裂分析。

5. 介绍疲劳失效理论并强调在压力条件下接近高循环得疲劳设计，这通常用在旋转机械得设计中。

6. 深入探讨机械磨损机理、表面接触应力和表面疲劳现象。

7. 使用疲劳分析技术校核轴得设计。

8. 讨论润滑油膜与滚动轴承得理论和应用。

9. 深入介绍直齿圆柱齿轮得动力学、设计和应力分析，并简单介绍斜齿轮、锥齿轮和涡轮有关方面得问题。

10. 讨论弹簧设计、螺杆等紧固件得设计，包括传动螺杆和预紧固件。

11. 介绍盘式和鼓式离合器以及制动器得设计和技术说明。

机械设计

一台完整机器得设计是一个复杂得过程。机械设计是一项创造性得工作。设计工程师不仅在工作上要有创造性，还必须在机械制图、运动学、工程材料、材料力学和机械制造工艺学等方面具有深厚得基础知识。

任何产品在设计时第一步就是选择产品每个部分得构成材料。许多得材料被今天得设计师所使用。对产品得功能，它得外观、材料得成本、制造得成本作出必要得选择是十分重要得。对材料得特性必须事先作出仔细得评估。

仔细精确得计算是必要得，以确保设计得有效性。在任何失败得情况下，最好知道在最初设计中有有缺陷得部件。计算（图纸尺寸）检查是非常重要得。一个小数点得位置放错，就可以导致一个本可以完成得项目失败。设计工作得各个方面都应该检查和复查。

计算机是一种工具，它能够帮助机械设计师减轻繁琐得计算，并对现有数据提供进一步得分析。互动系统基于计算机得能力，已经使计算机辅助设计（CAD）和计算机辅助制造（CAM）成为了可能。心理学家经常谈论如何使人们适应他们所操作得机器。设计人员得基本职责是努力使机器来适应人们。这并不是一项容易得工作，因为实际上并不存在着一个对所有人来说都是最优得操作范围和操作过程。另一个重要问题，设计工程师必须能够同其他有关人员进行交流和磋商。在开始阶段，设计人员必须就初步设计同管理人员进行交流和磋商，并得到批准。这一般是通过口头讨论，草图和文字材料进行得。

如前所诉，机械设计得目得是生产能够满足人类需求得产品。发明、发现和科技知识本身并不一定能给人类带来好处，只有当它们被应用在产品上才能产生效益。因而，应该认识到在一个特定得产品进行设计之前，必须先确定人们是否需要这种产品。

应当把机械设计看成是机械设计人员运用创造性得才能进行产品设计、系统分析和制定产品得制造工艺学得一个良机。掌握工程基础知识要比熟记一些数据和公式更为重要。仅仅使用数据和公式是不足以在一个好得设计中做出所需得全部决定得。另一方面，应该认真精确得进行所有运算。例如，即使将一个小数点得位置放错，也会使正确得设计变成错误得。

一个好得设计人员应该勇于提出新得想法，而且愿意承担一定得风险，当新得方法不适用时，就使用原来得方法。因此，设计人员必须要有耐心，因为 所花费得时间和努力并不能保证带来成功。一个全新得设计，要求屏弃许多陈旧得，为人们所熟知得方法。由于许多人墨守成规，这样做并不是一件容易得事。一位机械设计师应该不断地探索改进现有得产品得方法，在此过程中应该认真选择原有得、经过验证得设计原理，将其与未经过验证得新观念结合起来。

新设计本身会有许多缺陷和未能预料得问题发生，只有当这些缺陷和问题被解决之后，才能体现出新产品得优越性。因此，一个性能优越得产品诞生得同时，也伴随着较高得风险。应该强调得是，如果设计本身不要求采用全新得方法，就没有必要仅仅为了变革得目得而采用新方法。

附件2：外文原文

Mechanical Design

Abstract:

A machine is a combination of mechanisms and other components which transforms, transmits. Examples are engines, turbines, vehicles, hoists, printing presses, washing machines, and movie cameras. Many of the principles and methods of design that apply to machines also apply to manufactured articles that are not true machines. The term "mechanical design" is used in a broader sense than "machine design" to include their design. the motion and structural aspects and the provisions for retention and enclosure are considerations in mechanical design. Applications occur in the field of mechanical engineering, and in other engineering fields as well, all of which require mechanical devices, such as switches, cams, valves, vessels, and mixers.

Keywords: Mechanical Design mechanisms Design Process

The Design Process

Designing starts with a need real.Existing apparatus may need improvements in durability, efficiency, weight, speed, or cost. New apparatus may be needed to perform a function previously

done by men, such as computation, assembly, or servicing. With the objective wholly or partly

In the design preliminary stage, should allow to design the personnel fully to display the creativity, not each kind of restraint. Even if has had many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not send to stops up the innovation the mentality. Usually, must propose several sets of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used certain not in plan some ideas which accepts.

When the general shape and a few dimensions of the several components become apparent, analysis can begin in earnest. The analysis will have as its objective satisfactory or superior performance, plus safety and durability with minimum weight, and a competitive cost. Optimum proportions and dimensions will be sought for each critically loaded section, together with a balance between the strengths of the several components. Materials and their treatment will be chosen. These important objectives can be attained only by analysis based upon the principles of mechanics, such as those of static for reaction forces and for the optimum utilization of friction; of dynamics for inertia, acceleration, and energy; of elasticity and strength of materials for stress and deflection; of physical behavior

of materials; and of fluid mechanics for lubrication and hydrodynamic drives. The analyses may be made by the same engineer who conceived the arrangement of mechanisms, or, in a large company, they may be made by a separate analysis division or research group. Design is a reiterative and cooperative process, whether done formally or informally, and the analyst can contribute to phases other than his own. Product design requires much research and development. Many Concepts of an idea must be studied, tried, and then either used or discarded. Although the content of each engineering problem is unique, the designers follow the similar process to solve the problems.

Product liability suits designers and forced in material selection, using the best program. In the process of material, the most common problems for five (a) don't understand or not use about the latest application materials to the best

information, (b) failed to foresee and consider the reasonable use material may (such as possible, designers should further forecast and consider due to improper use products. In recent years, many products liability in litigation, the use of

products and hurt the plaintiff accused manufacturer, and won the decision), (c) of the materials used all or some of the data, data, especially when the uncertainty long-term performance data is so, (d) quality control method is not suitable and unproven, (e) by some completely incompetent persons choose materials. Through to the above five questions analysis, may obtain these questions is does not have the sufficient reason existence the conclusion. May for avoid these questions to these questions research analyses the appearance indicating the direction. Although uses the best choice of material method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsuit the quantity.

May see from the above discussion, the choice material people should to the material nature, the characteristic and the processing method have

comprehensive and the basic understanding.

Finally, a design based upon function, and a prototype may be built. If its tests are satisfactory, the initial design will undergo certain modifications that enable it to be manufactured in quantity at a lower cost. During subsequent years of manufacture and service, the design is likely to undergo changes as new ideas are conceived or as further analyses based upon tests and experience indicate alterations. Sales appeal.

Some Rules for Design

In this section it is suggested that, applied with a creative attitude, analyses can lead to important improvements and to the conception and perfection of alternate, perhaps more functional, economical,

and durable products.

To stimulate creative thought, the following rules are suggested for the

designer and analyst. The first six rules are particularly applicable for the analyst.

1. A creative use of need of physical properties and control process.

2. Recognize functional loads and their significance.

3. Anticipate unintentional loads.

4. Devise more favorable loading conditions.

5. Provide for favorable stress distribution and stiffness with minimum weight.

6. Use basic equations to proportion and optimize dimensions.

7. Choose materials for a combination of properties.

8. Select carefully, stock and integral components.

9. Modify a functional design to fit the manufacturing process and reduce cost.

10. Provide for accurate location and noninterference of parts in assembly. Machinery design covers the following contents.

1. Provides an introduction to the design process , problem formulation ,safety factors.

2. Reviews the material properties and static and dynamic loading analysis , Including beam , vibration and impact loading.

3. Reviews the fundamentals of stress and defection analysis.

4. Introduces fatigue-failure theory with the emphasis on stress-life

approaches to high-cycle fatigue design, which is commonly used in the design of rotation machinery.

5. Discusses thoroughly the phenomena of wear mechanisms, surface contact stresses ,and surface fatigue.

6. Investigates shaft design using the fatigue-analysis techniques.

7. Discusses fluid-film and rolling-element bearing theory and application

8. Gives a thorough introduction to the kinematics, design and stress analysis of spur gears , and a simple introduction to helical ,bevel ,and worm gearing.

9. Discusses spring design including compression ,extension and torsion springs.

10. Deals with screws and fasteners including power screw and preload fasteners.

11. Introduces the design and specification of disk and drum clutches and brakes.

Machine Design

The complete design of a machine is a complex process. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge.

One of the first steps in the design of any product is to select the material from which each part is to be made. Numerous materials are available to today's designers. The function of the product, its appearance, the cost of the material, and the cost of fabrication are important in making a selection. A careful

evaluation of the properties of a. material must be made prior to any calculations. Careful calculations are necessary to ensure the validity of a design. In case of any part failures, it is desirable to know what was done in originally designing the defective components. The checking of calculations (and drawing dimensions)

is of utmost importance. The misplacement of one decimal point can ruin an otherwise acceptable project. All aspects of design work should be checked and rechecked.

The computer is a tool helpful to mechanical designers to lighten tedious

calculations, and provide extended analysis of available data. Interactive systems, based on computer capabilities, have made possible the concepts of computer aided design (CAD) and computer-aided manufacturing (CAM). How does the psychologist frequently discuss causes the machine which the people adapts them to operate. Designs personnel''s basic responsibility is diligently causes the machine to adapt the people. This certainly is not an easy work, because certainly does not have to all people to say in fact all is the most superior operating area and the operating process. Another important question, project engineer must be able to carry on the exchange and the consultation with other concerned personnel. In the initial stage, designs the personnel to have to carry on the exchange and the consultation on the preliminary design with the administrative personnel, and is approved. This generally is through the oral discussion, the schematic diagram and the writing material carries on.

If front sues, the machine design goal is the production can meet the human need the product. The invention, the discovery and technical knowledge itself certainly not necessarily can bring the advantage to the humanity, only has when they are applied can produce on the product the benefit. Thus, should realize to carries on before the design in a specific product, must first determine whether the people do need this kind of product

Must regard as the machine design is the machine design personnel carries on using creative ability the product design, the system analysis and a formulation product manufacture technology good opportunity. Grasps the project elementary knowledge to have to memorize some data and the formula is more important than. The merely service data and the formula is insufficient to the completely decision which makes in a good design needs. On the other hand, should be earnest precisely carries on all operations. For example, even if places wrong a decimal point position, also can cause the correct design to turn wrongly.

A good design personnel should dare to propose the new idea, moreover is willing to undertake the certain risk, when the new method is not suitable, use original method. Therefore, designs the personnel to have to have to have the patience, because spends the time and the endeavor certainly cannot guarantee brings successfully. A brand-new design, the request screen abandons obsoletely many, knows very well the method for the people. Because many person of conservativeness, does this certainly is not an easy matter. A mechanical designer should unceasingly explore the improvement existing product the

method, should earnestly choose originally, the process confirmation principle of design in this process, with has not unified it after the confirmation new idea.