What is the career development prospect of locksmiths? Please analyze it in detail.

Locksmith is a technology with a long history, which can be traced back to 2000 years ago. With the development of science and technology. Many fixture machining jobs have been replaced by mechanical machining, but assembly fixture machining still plays a very important role as an indispensable process in mechanical manufacturing. For example, the assembly, maintenance and inspection of mechanical products all require the work of assembly fitters, and assembly fitters are also necessary jobs for the final manufacture of all mechanical equipment. This shows the position of assembly fitter in mechanical manufacturing, so it is very important to master the technical points of assembly fitter for mechanical manufacturing.

The fitter uses various tools to finish the machining of parts based on manual operation. Compared with machining, locksmith has high labor intensity, low production efficiency and low manufacturing accuracy, but it is also an inconvenient and difficult type of work in machining, especially assembly locksmith, which is related to the dimensional accuracy, position accuracy and shape tolerance of products, that is to say, assembly locksmith is related to the quality of products and whether they are qualified or not. However, only when we understand the assembly process regulations can we improve labor productivity and ensure product quality. Only by strictly observing the process regulations can we ensure the smooth assembly work, reduce the cost and increase the income of the factory. Therefore, as long as we know the precautions in assembly, we can give full play to our own strength in production, which is also the purpose of this paper.

A. Basic skills of assembly fitter

The basic skills of assembly fitter mainly include scribing, drilling, filing, sawing, reaming, working thread and tapping, and assembly, debugging, inspection and trial operation of mechanical parts. To be a qualified fitter, we should not only process qualified products, but also have the knowledge of safe and civilized production to adapt to the production slogan of "safety first, production second". The following are the basic skills and precautions of locksmith.

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Scribing is an operation process to mark the processing boundary on the blank or semi-finished product according to the drawings and technical requirements or based on points, lines and surfaces. Marking requires clear and uniform lines. The dimension and positioning dimension are accurate, and the marking accuracy is generally required to be between 0.25 mm and 0.5 mm. Marking can determine the machining allowance of the workpiece; Make the processing have obvious size restrictions; Can also find and deal with unqualified blank.

Marking tools include marking needle, marking gauge, marking disk, steel ruler, sample punch, etc. The marking tool should be separated from the blank to avoid the burr of the blank scratching the marking tool and affecting the accuracy of the tool. At the same time, it should be maintained in time to avoid rust of tools. Before marking, you must first understand the drawings and process requirements, and make clear the marking task; Check whether the blank and workpiece are qualified; Then, clean the marked part and paint it; Determine the marking benchmark; Select the scribing tool for scribing.

The steps of marking are usually as follows:

1 read the drawings, know the parts that need to be marked on the workpiece in detail, define the functions and requirements of the workpiece and the marked parts, and understand the related processing technology.

2 Selected marker datum

3 check the error of the blank preliminarily and color the blank.

4 Correct installation of workpieces and selection of marking tools

5 underline

6 Check the accuracy of the marks in detail against foreign drawings to see if there are any omissions.

Make 7 holes in the line.

(2) filing

Precautions for archiving:

1 The file handle should be firm. Do not use files with cracked file handles.

Do not blow iron filings with your mouth, and do not clean them with your hands.

3 file placement shall not expose the clamping table.

4 When clamping the machined surface, a protective plate should be used, and a wooden pad should be added to the larger workpiece.

(3) sawing

Sawing is a processing method of cutting or sawing materials or workpieces with a saw. Skills and methods: Hold the handle of the saw bow with your right hand, press your thumb on your index finger, control the direction of the saw bow with your left hand, put your thumb on the back of the bow, and hold your index finger, middle finger and ring finger at the front end of the saw bow in the same posture as the file. The sawing method is that the left hand is tilted upwards when advancing, and the right hand is pressed downwards. When returning, the right hand is lifted upwards, and the left hand naturally follows backwards, about 40 times per minute.

(4) drilling

When drilling on a drilling machine, the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. When drilling, first draw the cross center line of the hole position at the drilling position, and punch the central sample hole. It is required that the drilling hole is small and the center of the sample hole coincides with the cross intersection point. When tripping out, first make a small hole in the hole, observe whether the hole position is correct, and constantly correct it so that the shallow hole is coaxial with the scribing circle. When drilling small diameter holes or deep holes, the feed rate will be unscrewed from the drill bit when the cutting is blocked. When the drilling hole is about to penetrate, the feed force must be reduced to prevent the drill bit from breaking due to sudden excessive feed, increase the cutting resistance, or cause an accident when the workpiece rotates with the drill bit. In order to cool the drill bit, reduce the friction between the drill bit and the hole, improve the life of the small drill bit and improve the quality of the empty surface, enough cutting fluid should be added when drilling.

⑤ worker thread

Precautions for power line:

Bevel the bottom hole before 1 thread.

2 The clamping position of the workpiece should be flat, so that the center line of the screw hole is in a vertical or horizontal position.

3 When the tap cuts into 1~2 turns, check and correct the vertical position of the tap in time.

When the hole is blocked, the tap must always be withdrawn to discharge the iron chips in the hole, otherwise the tap will break due to the iron chips blockage or fail to meet the requirements of thread depth.

According to the structural characteristics, design and manufacturing process requirements of parts, find out the size benchmark, analyze the design benchmark and process benchmark, and clarify the main forms of size categories. Analyze whether the functional dimensions that affect the performance are reasonable, whether the dimensions required for marking the structure meet the requirements, and whether other dimensions meet the process requirements.