Vocational education should aim is to develop a comprehensive vocational ability and comprehensive quality, directly in the production, services, technology and management work of the first line of talents, so as to have both the expertise, but also practical skills. Vocational education should be integrated market economy and highlighted the practical teaching skills, to develop skills that talent-based guiding ideology. In this paper, tolerance courses in higher vocational institutions with real problems that exist in teaching an analysis and discussion, with this course of teaching experience and practice, and put forward concrete measures and proposals. ª¥
First, mechanical tolerances and professional course with the teaching demands ª¥
1. Nature and mandate ª¥
"Tolerance with" a standardized areas. "Technical cooperation and tolerance measurement" is the machinery of professional practice a strong foundation for the professional class, its mission is to enable students to obtain the geometric precision mechanical parts and coordinate with each other based on the knowledge and geometric parameters of the basic detection technology, mechanical Professional and technical personnel must have the basic knowledge and basic abilities. ª¥
2. Basic requirements ª¥
(1) precision mechanical design master the basic concepts of precision design of the basic steps, basic principles and methods. ª¥
(2) have basic linear geometry of size, angle size, shape and location accuracy of the basic concepts and shape precision and accuracy of the relationship between size. With the preliminary design of geometric precision of capacity. ª¥
(3) understanding of the typical components and the transmission of basic knowledge of precision design. ª¥
(4) common understanding of the principle of measuring apparatus, adjust and use. ª¥
(5) have the mechanical parts of the general geometric measurement technology for the initial capacity. ª¥
This course is mandated to: with tolerance and grasp the basic knowledge measurement technology, should be used with the tolerance standard, with the initial choice of tolerance with the ability to choose the correct Measuring Tool Measuring Instruments, will conduct a general survey technology, design Commonly used gauge, and for future learning and lay a good foundation for the work. Tolerance introduced with the basic terminology, standard tolerance campaign, the basic bias Series, commonly used size hole axis tolerance zone and cooperation. Understanding of tolerance with the definition of the term, familiar with the size marked with the meaning of tolerance, tolerance information on the forms to find the way. ª¥
Second, tolerance and cooperation teaching methods ª¥
1. The creation of democratic atmosphere and to stimulate awareness of and interest in the main student ª¥
Is the main sense of understanding and practice as the main activities of the people's own dominant position, the main capacity and the main value of a conscious awareness is the main autonomy, initiative and creativity of the concept of performance. Stronger sense of the principal, student participation in their own development, in the learning activities to realize their awareness on the nature of the force stronger. Most of the students in the course of studying mechanical little interest in tolerance and cooperation programmes, but also show lack of autonomy of the state. First of all teachers should be teaching in promoting democracy in the style of teaching, create a harmonious and equal an atmosphere of learning, students activate the main body awareness, strengthen the autonomy of students, has become the innovation potential of students contributed to the fire burst out the pilot light of the need to become critical. Teachers should stress tolerance with the full course of the value and practical significance, and on the mechanical courses career prospects. ª¥
2. The challenge, eliminating doubt as the process of teaching an important part of ª¥
Tolerance in the ordinary course with the writing on the blackboard in the form of teaching, it is very abstract, the students questioned many of the questions, teachers should be good at discovering and difficult to grasp these doubts, repeated stress, focusing on speaking, detail, specifically. In a planned and inspired students to focus on questions. Design should be targeted and stimulating the difficult issues, particularly the teaching of doubts and difficulties and relatively subtle or potential, inspire students thinking of, and gradually eliminating doubt, in the exploration discoveries and innovations; encourage students to inter-active debate Contradictory statements, and look forward to expose shortcomings. Only in this way can learn this-door practicality of the courses. ª¥
3. Focused on the teaching handle ª¥
In preparation courses, in accordance with the teaching objectives, identify each lesson of the teaching content, distinguish between primary and secondary, should have listed the specific knowledge, knowledge of each re-establish control points should be taught the specific content. According to the contents of the use of appropriate teaching methods, improving teaching effectiveness. For example, smooth cylinder with tolerance and the basic terms of this section, is related to national standards established by the foundation, if students can grasp, and to enhance interest in learning, the content of the follow-up to it easily, otherwise the contrary. So this is a key content, but it is not difficult. In this lesson in the knowledge I selected the main point is interchangeable, the basic size, size limits, tolerance, limit deviations, the basic error, and several important concepts. Should be taught in one by one with vivid language, with practice examples to illustrate January 1, so that students can gain a profound understanding of their meaning and the relationship between them. For the content of the follow-up study to lay a solid foundation. The use of commonly used measurement apparatus is also a key content, is to train students hands-capacity and operational skills to grasp the basic content of. This focus on the content of vernier caliper, the diameter and 1,000-foot-diameter Bai Fenbiao use. Teaching at the first control-kind clarifying the structure of these measuring tool, reading principle, the use of methods and the use of attention; followed by experimental measurement to enable students to skillfully master the correct usage. ª¥
4. Teaching Content Selection: theoretical knowledge "must" and "sufficient", focus on capacity-building practice ª¥
From a professional point of view to determine the course of teaching objectives and content of courses, in accordance with the theory of knowledge "must" and "sufficient" principle, to reduce a number of academic, professional and light practice or training objectives little content. In determining teaching plan, in accordance with professional training goal by deleting the principle of tolerance, linked size calculation of the weight of academic content, and the cone angle and tolerance, button-tolerance connection with the spline, involute line spur gear, such as tolerance and professional Training objectives little content. Highlights the smooth cylinder of tolerance and cooperation, the shape and location of tolerance, surface roughness, and other basic theory and relevant national standards, such as the use of main content, and schools as far as possible the conditions of the existing arrangements for a number of pilot projects to develop the operational skills of students . ª¥
5. In the form of multimedia teaching tolerance classes with the application of ª¥
Vocational courses many of the teaching basically follow the traditional method of teaching: "writing on the blackboard + on." The traditional way of teaching the absence of visual presentations, classes of students by teachers do not know clouds, causing the teacher on the podium speaking, students in desks on the sleepy, very poor results. Tolerance with the proposed course, can be: "demo on the + operation," the new teaching methods taught. The direct use of multimedia teaching advantage of the display will be machinery to the professional courses taught to students. The use of advanced tools and building a more modern multimedia classroom, use of large-screen projection for visual teaching, student interest in learning will be markedly improved, the phenomenon of the past will be decreased significantly. In teaching to achieve teacher-student interaction, use of multimedia classroom teaching to achieve multiplier effect. ª¥
Conditional schools, you can also buy or recording large modern manufacturing enterprises, high-performance processing equipment, advanced manufacturing processes and production management of the video or CD-ROM, so that students can practice on a visual image of engineering knowledge of modern manufacturing technology in enterprises Application of a deeper understanding of, in particular, students can broaden their horizons so that students a clear understanding of engineering practice in the manufacturing sector in the status and enhancing student learning confidence and cultivate the interest of students, improve their enthusiasm. ª¥
Third, summing up ª¥
Tolerance is a practice with a strong curriculum, teachers should change their concepts, to earnestly improve the teaching methods and teaching methods, step by step in a planned transition to "teachers under the guidance of the student-centred" teaching model, fully mobilize the initiative of students So that students take the initiative to establish a structure of personal knowledge and ability. Courses with mechanical theory and practice of the strong characteristics of a set of choices in teaching materials for higher vocational students, teachers complete control of materials, adopt flexible teaching methods, teaching selected major and difficult, and organize educational content, Choose the right-aided teaching software, the theory and experiment with organic operation, so that theory resides in operation, in operation in the digestion theory. This mechanical lesson of tolerance with professional courses to teach, learn.
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