Bench worker's measurement lecture notes

As a teacher, it is inevitable to write a lecture. With the lecture, we can improve our teaching ability quickly. So what problems should we pay attention to when writing a speech? The following is the draft of the fitter's measurement lecture I collected for reference only. Let's have a look.

Firstly, the structure and content of the textbook are briefly analyzed.

The teaching content involved in this lesson is the book "Fiddler Making Practice" by China Labor Publishing House. Measurement is the process of comparing standard quantity with measured quantity. This part is closely related to the quality of parts and products, and it is one of the technological contents of filing, sawing and drilling operations in this textbook. The teaching of this class is based on the students' practice in the basic operation of locksmith, and adopts the behavior-oriented teaching method-project method. After the fitter's measurement activities, students have felt and experienced the measurement methods, precautions, error analysis and unqualified reasons. Because these textbooks are closely related to students' actual operation, students have high interest in learning and good interaction.

Second, the teaching objectives

According to the analysis of the structure and content of the above-mentioned teaching materials, taking into account the psychological characteristics of students' existing cognitive structure and previous operating experience, the following teaching objectives are formulated:

1. In the activity, let students master the use and maintenance of common measuring tools, the detection of machining accuracy and the cause analysis, and attach importance to the cultivation of professional ability.

2. Enhance teamwork spirit and verbal skills, enhance self-confidence, and pay attention to the cultivation of social skills.

3. Integrate theory with practice, increase interaction and cultivate students' ability to analyze and solve problems. Give full play to students' "eye movement, brain movement, hands-on and mouth movement" in class, be careful in practice, and let students develop strict professional quality.

Third, the focus and difficulties in teaching

Emphasis: master the measurement method of workpiece machining accuracy.

Difficulties: Analysis of the reasons for incorrect accuracy.

Fourth, talk about teaching methods and learning methods.

Fitter's production practice is a course to cultivate intermediate technical workers' operation skills, which focuses on practical ability and attaches importance to skill operation. It is one of the basic contents of mechanical and electrical students' practice. Therefore, in teaching, students should not only "know why" but also "know why". Teachers are in the position of guide, organizer and cooperator in the whole teaching activities, and regard students as the "subject" of learning, and strive to create an equal and harmonious learning atmosphere, so that students can experience sub-project measurement activities in independent and cooperative exchanges and give them enough time and space to learn in their own way.

Fifth, talk about the teaching process.

1. Give students enough time to study in teams and broaden the teaching time and space. The time allocation of this lesson is as follows: 2 minutes to introduce the new lesson, 65,438+04 minutes for students' group activities, 20 minutes for students to show their achievements and comment, 3.5 minutes for teachers to summarize and evaluate, and 0.5 minutes for homework assignment.

(1) The locksmith operation is a practical teaching activity. Because students have accumulated some experience in skill operation before class, and combined with the requirements taught in this class, students have enough independent learning ability.

(2) After class, let students experience what they have learned in this class in practice and apply it to their daily work through practice.

2. In the whole teaching process, it embodies the new concept of curriculum reform: "Fitter teaching is an active teaching, a process of teacher-student interaction and student-student interaction". The teaching of the whole class revolves around activities. Students participate in the whole process, and all staff participate in the project activities. Every activity has exchanges between students.

(1) manufacturing problem scenario

At the beginning of the class, I asked why the quality of some mechanical and electrical products in our country is not as good as that of foreign countries (service life, machine accuracy, energy consumption, performance, etc.). ), and put forward the relationship between the machining accuracy (dimensional accuracy, shape accuracy and position accuracy) of parts and different assembly methods (complete interchange method, grouping assembly method, adjustment method and repair method) and product quality, which has a great relationship with the fitter's operation and is fully mobilized through analysis.

(2) Explore independently and find out the reasons.

Practice and make records. Students are divided into four groups (red, yellow, blue and green) with 6-8 people in each group. The workpiece is divided into four items to test the dimensional accuracy, hole spacing accuracy, position accuracy and matching requirements, and learn together in the form of a team.

(1) Each group of students sends representatives to collect workpieces, and the teacher issues single-angle mosaic parts drawings and workpiece inspection record cards. According to this group of measurement items, let the students go to the podium to choose the tools and measuring tools needed to detect the workpiece.

② Students' measurement operation. According to the requirements of this group of testing items on the record card, carry out relevant requirements testing. And fill in relevant records as required.

(3) At this time, teachers go down to each group to give guidance (answer questions) on the problems existing in students' measurement.

(4) Students show their achievements and evaluate them. Ask the students to talk about the reasons for inaccuracy and how to prevent inaccuracy. (At this time, the teacher gives some encouragement to the students who appear on the podium, such as "It is best to stand on the podium" and "Students give some encouragement and be bold", so that other students can supplement and further consolidate what they have learned. ⑤ Teacher evaluation summary. Find out the bright spots of each group of students in the activity, give oral praise and encouragement to the outstanding group, and put forward their own views on the shortcomings, so that students can have a clear understanding of the measurement. I hope that students will carefully analyze and pay attention to the problems that are easy to occur, and don't just pay attention to a certain precision and ignore other precision requirements in machining.

In classroom teaching design, we should follow the principles of "teacher-led, student-centered, activity-centered, and thinking-centered", so that students can actively participate in the whole teaching process. By using various activities such as sub-projects, records and exhibitions, students can learn while playing. Students can study easily and happily, and their main role has been fully demonstrated. By communicating with students after class, they are happy to attend such classes and master their skills well.