How to read mechanical drawings in detail

In precision mechanical processing the drilling, cutting, lathe,…. The highest accuracy and finishing requirements are for the details available for repairing or firing a few more holes that also need to be carefully and carefully calculated. So how can you accurately process the mechanical details as well as know the size and location to shoot? It is the use of technical drawings, technical drawings to help the outsourcing engineer know what he needs to do with the detail and what are the requirements? Knowing how to read detailed drawings is a must for those who want to follow the mechanical industry especially precision machining.

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How important is reading the drawing?

Mechanical drawings come in many different types, used to show details, machines or a system. Mechanical drawings will help the engineer grasp the characteristics, shapes, positions, materials,…. of machinery, parts to be produced, maintained. By constructing the technical image in a 3-dimensional space, the engineer can know the structure of the hidden parts from which it is easy to repair, process or produce all kinds of products.

Reading mechanical drawings is very important.
Reading mechanical drawings is very important

Because of these things, reading drawings for mechanics is almost a necessity, because reading will also help a lot in the work and can complete many problems more easily. Otherwise, there will be a lot of difficulties in maintenance, operation, installation, processing,…..

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Some requirements are needed to be able to read the drawing.

In order to be able to read mechanical drawings, we need to have the basic knowledge related to geometry, painting and technical drawing to be able to grasp the information on the drawing. Besides, the actual go at the mechanical workshops, is directly looking at the shape of the types of details, machines,… thereby comparing with the drawing will be easier to visualize and create a habit for the set when looking at the drawing. This will make it easier to learn, learn as well as read mechanical drawings.

Reading comprehension skills, along with logical thinking are very good complementary skills for engineers, or young people who are looking to study and work in the field of mechanical engineering.

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Instructions on how to read technical drawings

There are quite a few different types of technical drawings, but machining drawings are the most used type of drawing, especially in precision machining. It is necessary to ensure the accuracy of the size to be processed as well as the need to ensure the width length, machining distance to ensure that when assembling the details are accurate and matched together.

In addition, other technical drawings have a similar reading and the representation of the amount of information will also depend on which technical drawings are showing for details, which products.

Step 1: Read the basic overview of the drawing

The first thing when holding the drawing we need to read the basic information of the drawing such as: Detailed name, quantity, proportion, material,…… All that information will be gathered at an information frame of the drawing angle, the engineer when reading the drawing will be able to grasp the basic information to visualize the shape, the cutting axis positions, projections,….

The information of the drawing will be clearly shown on the drawing.
The information of the drawing will be clearly shown on the drawing

Step 2: Analyze the slide, the cutting edge of the drawing

After reviewing and capturing the specific information of the drawing in the information frame, we will be able to move the learning position to the top of the information frame where the projection of the detail is represented, along with the cross sections and shapes of the details. When considering the projections we need to identify the main projections, then the cross sections, then the locations to be processed. Capturing the details and parameters on the drawing will help us to visualize more clearly when starting to process and process the mechanical details.

Carefully review the cross section, parameters of the drawing
Scrutiny of the cross section, parameters of the drawing

Step 3: Read the parameters, details on the drawing

Every drawing, projection, cross section of detail is clearly visible, we need to know how to read those parameters to be able to understand and visualize the details in a specific and comprehensive way. The details, or any processed product with non-holes (the round size of the holes) also need to be paid attention, because when the work is very important to ensure accuracy is very important, the processing of errors will also lead to a series of defective products and need to be discarded.

Capture the specifications of the drawing
Capture the specifications of the drawing

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Step 4: Carefully read the requirements of the drawing on surface roughness, tolerance allowed

In this step we will determine the surface roughness of the machining detail. Usually the roughness of the detail will be shown right in the performance. Sometimes they are shown in the upper right corner of the drawing. Reading the parameters thoroughly, tolerance, size, surface roughness is very important. Through this, we will determine technological measures and machining methods to ensure the size and roughness of the product’ technical requirements.

The conclusion

Reading technical drawings are the first skills that we need to know when we want to follow mechanical-related professions. This is essential to help supplement the foundational knowledge, besides also need to learn and learn more as well as go to experience reality at workshops, factories, manufacturing, mechanical processing.

In order to be able to add more knowledge, we can also ask the opinions of those who have gone before us so that we can learn new things as well as the experiences of those who came before us.

Above are some experiences that VCC Molds shares, at VCC Molds we specialize in providing precision mechanical processing services, design, mold fabrication. If you have any requests for precision mechanical processing, please contact us immediately via Hotline / Zalo: 0934 683 166 or leave a message here . We will contact you again as soon as possible.




Vietnam Capacity Precision Mold Joint Stock Company

Address: Lot B2-3-3b, Nam Thang Long Industrial Park, Thu Phuong, Bac Tu Liem, Bac Tu Liem, Hanoi

Phone: (+84)24 6687 8283


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