What is the difference between scribing and drawing

Scribing: Noun, such as"Upline""Underline.

Draw a line: A verb that draws a line at a certain position in a sentence (somewhere).

Drawing a line is wrong is usage, and the correct usage is to draw a line.

Scribing [huàxiàn].

Interpretation: refers to the operation of accurately drawing the processing boundary on the surface of the workpiece according to the size of the drawing or the physical object.

Scribing is an important process in machining, which is widely used in single parts or small batch production. In foundry enterprises, the first piece of the new mold can be marked and tested, which can find the problems in the size and shape of the casting in time, and take measures to avoid the loss caused by batch failure.

According to the drawings and technical requirements, the operation process of drawing the processing boundary with the marking tool on the blank or semi-finished product, or drawing the point and line as the datum is called the marking line.

Commonly used marking tools include marking plate, marking needle disk, marking gauge, center punch (sample punch), rectangular ruler, vernier height ruler, V-shaped iron, etc.

Marking tools are mainly used in the marking process in machining, and are widely used in single parts or small batch production.

The function of scribing: determine the machining position of the workpiece and the machining allowance. Check whether the shape and size of the blank conform to the drawing. Remedies when the blank is defective by scribing "borrowing". It is used for blanking.

1) When marking the line, the lines should be clear, even, and the numbers should be accurate, and all kinds of lines and symbols should be complete and accurate, and the deviation of each line pattern should be <.

2) The scribing deviation requires that the difference between the maximum diameter and the minimum diameter on the same section of the cylindrical part of the pressure element should not be greater than its nominal inner diameter; The straightness of the pot shell in each meter length should not be greater than, and the straightness of the full length should not be greater than 7mm;

The total length deviation of the pot shell is in the range of 15mm. According to the above requirements, the two diagonal line deviations and perimeter line deviations of the material calculated according to the diameter of the cylinder section are determined.

Able to find and deal with unqualified blanks in time; When the blank error is not large, the method of borrowing material marking can be used to remedy, so as to improve the pass rate of the blank. According to the drawings and technical requirements, the operation process of drawing the processing boundary with the marking tool on the blank or semi-finished product, or drawing the point and line as the reference is called the marking line.

There are two types of marking: planar and three-dimensional. Only one surface of the workpiece needs to be marked to clearly indicate the processing boundary, which is called plane marking; It is necessary to draw lines on the surface of several workpieces at different angles (generally perpendicular to each other) in order to clearly indicate the late limit of the processing base, which is called three-dimensional marking of the workpiece. The basic requirements for marking are that the lines are clear and symmetrical, and the shaping and positioning dimensions are accurate.

The Dash tool is categorized by purpose.

1. Datum tools, including scribing plates, square boxes, V-shaped iron, and triangle iron.

Bending plates (right-angled plates) and various indexing heads, etc.

2. Measuring tools, including steel plate rulers, height measuring rulers, and vernier calipers.

Universal angle rulers, rectangular rulers, and steel tape measures to measure long dimensions, etc.

3. Drawing tools, including scribing needles, scribing discs, height vernier rulers, scribing rules, scribing cards, flat rulers, curve boards, hand hammers, sample punches, etc.

4. Auxiliary tools, including horns and jacks.

C-shaped chucks and clamps, as well as wooden strips and lead strips that are driven into the workpiece hole when centering and rounding.

Now it's you who draw a line or two lines, and a line is a line that is drawn under something that already exists.

Question 1: What is the role of the fitter's marking to facilitate the post-processing, clearly express the position of the painted content, etc.

Question 2: What is the function of dotted lines in construction Hello, the code stipulates that the axis is indicated.

Question 3: What are the functions of marking and cavity opening tools The so-called "marking" is to mark the position that needs to be processed with lines and symbols according to the requirements of the things that need to be processed in the material; Sometimes it is also called "lofting", different industries use different tools for "scribing", and the scribing in machining is commonly used in flat plates, drawing needle holders, height rulers, V-shaped horns, rulers, compasses, hand hammers for marking, punches, and pigments.

Question 4: What is the role of fitter's marking Fitter's marking is used as the basis for machining. Scribing can also be used to compensate for defects in the blank (borrowing method).

Question 5: What is the function of dotted lines in construction projects? It is generally expressed as an axis, mainly used for the positioning of walls and columns.

Question 6: The role of scribing 2What is a scribing datum? How to choose a scribing datum Scribing plays a very important role in the machining of basic parts (such as bases, boxes, and special-shaped parts).

In ordinary machining, the basic parts are generally cast or forged. In order to ensure that the design requirements can be realized in the final process in ordinary casting or forging, a certain amount of machining is reserved for the position of the platform and the table size of the machining hole in the pattern making. At the same time, when casting or forging, due to the cumulative error of molten iron pouring or forging forming, the physical shape has a certain allowable deviation from the processing requirements of the drawings.

In this case, it is necessary to consider the position size of the subsequent process through scribing. Without the marking process, the processing of the basic parts would not be possible.

The datum is the embodiment of the datum on the design drawing in the physical object. The position of each hole, column, table, etc. on the design drawings is taken from a reference position. This datum position is the datum of the line.

The selection of marking datum is mainly based on the requirements marked in the design drawings, on the basis of ensuring the processing position and machining allowance of various holes, columns, and tables, and according to the specific conditions of the physical object. It is necessary to consider the main location and size on the design drawings by the side of the mountain, otherwise it will lead to the scrapping of the foundation parts.

<> function: underscores are generally used in the input of names, (only numbers, letters, and underscores can be entered) and in some documents (such as word), underscores are often used to enhance attention.