Parts NC machining process analysis

The NC machining process analysis of the parts is the most important and extremely complex link in the NC program. It is also the core work of the CNC machining process design and must be completed before the CNC machining program is formulated. A qualified programmer must have a clear and comprehensive understanding of the functions and features of CNC machine tools and their control systems, as well as every aspect that affects CNC machining, so as to avoid possible product quality due to ill-considered process solutions. The problem has caused unnecessary waste of human and material resources. Comprehensive and reasonable numerical control process analysis is an important guarantee for improving the quality of NC programming.

In the numerical control processing, from the design drawing of the parts to the qualified delivery of the finished parts, not only the preparation of the numerical control program but also the arrangement of the processing route of the parts, the selection of the processing machine, the selection of cutting tools, and the processing of the parts are taken into consideration. The impact of a series of factors such as the positioning fixture, before the start of programming, must carry out detailed numerical control processing technology analysis of the parts design drawings and technical requirements, in order to finally determine what is the technical key of the part, which is the difficulty of the numerical control processing, And the difficulty of NC programming.

The technical analysis of parts is also the first step in the numerical control planning. Based on this, the CNC machining tools, machining tools, process equipment, cutting amounts, and numerical control processing routes required for the parts' numerical control processing can be determined to obtain the best processing technology. The plan will eventually meet the requirements of the parts engineering drawings and related technical documents.

CNC machining process flow chart

1. Raw materials required for CNC routing

(1) Parts design drawings, technical data, and product assembly drawings.

(2) Production volume of parts.

(3) Relevant technical standards required for CNC machining of parts, such as enterprise standards and process documents.

(4) Quality standards for product acceptance.

(5) Existing production conditions and data. Manufacturing capacity of process equipment and special equipment, specification and performance of processing equipment and process equipment, and technical level of workers.

2. Rough state analysis

Most parts design drawings only define the shape and size of the part when it is processed, and there is no data specifying the raw blank material, including wool type, size, shape, heat treatment status, and hardness. When programming, in-depth understanding of wool is an important starting point. Using these original information is beneficial to NC programming.

(1) Analysis of product assembly drawings and parts drawings

For the analysis and research of assembly drawings, it is mainly to be familiar with the product's performance, use and working conditions, clarify the mutual assembly position and role of the parts in the product, understand the basis for formulating various technical conditions on the parts drawing, and find out the main technical key The problem lays the foundation for formulating the right processing plan. Of course, when the ordinary parts are subjected to the process analysis, the analysis of the assembly drawing may not be performed.

(2) Process Analysis of Parts Drawings

The analysis and study of the parts drawing is mainly the process review of the parts, such as inspection of the view of the design drawings, dimensioning, technical requirements whether there are errors, omissions, especially for parts with poor structural properties, if possible, and design The staff communicates or proposes amendments, and the designer decides whether to make necessary modifications and improvements.

1 Analysis of the integrity and correctness of part drawings

The view of the parts should conform to the requirements of the national standard. The location is accurate and the expression is clear; the relationship between the geometric elements (points, lines, areas) (such as tangency, intersection, and parallel) should be accurate; the dimensions should be complete and clear.

2 parts technical requirements analysis

The technical requirements of parts mainly include dimensional accuracy, shape accuracy, position accuracy, surface roughness and heat table processing requirements. These technical requirements should be the limit values ​​under the premise of ensuring the performance of the parts. The analysis of the technical requirements of parts is mainly to analyze the rationality of these technical requirements and the possibility of implementation, and to focus on the analysis of the machining accuracy and technical requirements of important surfaces and parts in order to prepare for a reasonable processing plan. At the same time, through analysis to determine whether the technical requirements are too stringent, because the high accuracy and too small surface roughness requirements will complicate the process, increase the difficulty of processing, and increase unnecessary costs.

3 Dimensioning Method Analysis

The dimensioning methods for parts drawings include local scattered labeling, centralized labeling, and coordinate labeling. For parts machined on CNC machine tools, the dimensions on the parts drawings shall be as far as possible in the premise of guaranteeing the performance of the use, and shall be marked in a centralized manner or marked on the same basis (ie, the coordinate dimension is marked). This not only facilitates the preparation of numerical control programs, It is also beneficial to the unity of design basis, process reference and programming origin.

4 Material Analysis

In the premise of meeting the functions of the parts, cheap materials should be used. When selecting materials, we should base ourselves on domestic products and do not easily choose valuable and scarce materials.

5 Structural Process Analysis of Parts

The structural technics of the parts refers to the feasibility and economy of the designed parts that can be manufactured under the premise of meeting the performance requirements. Good structural processability will make parts easier to process, save cost, and save materials; and poor structural processability will make processing difficult, increase costs, waste materials, and even can not be processed. By analyzing the structural characteristics, accuracy requirements and complexity of the parts, the required machining methods for the parts and the types and specifications of the CNC machine tools can be determined.

By accumulating nearly 20 years of experience in plastic machinery production technology and manufacture of hundreds of plastic machines, the company developed and produced high-speed cast film unit, cast breathable film production line, multilayer co-extrusion casting unit, etc. Our technical team has rich experience and high tackling capacity, and the equipment developed by the technical team has stable and reliable quality, excellent index and high flexibility, obtaining the approval and praise of users.

 

Application:

1.      Diaper based film, deep-embossed film and various kinds of medical hygiene film.

2.      Table clothes, plastic gloves, shower caps, suit covers and umbrella base film.

3.      Original film used for packaging, such as surgical gowns

 

FAQ:

Q1: Are you a Manufacture Factory?

No, we are not direct Manufacture Factory, but our factory has been cooperated with Changzhou ZL Machinery since 2000. We are able to offer the most competitive price.

Q2: Installation and commissioning?

We will send our engineer for installation and commissioning. Also, our engineer will train worker until they could produce the product successfully. But, the relevant cost will be paid by you.

 

Customer demanded is our pursuit. If you have any question about this production line, please contact us directly. We will response you in 24 hours. We are willing to take you visit the factory. For any inquiry, please email us directly.  

Casting Film Production Line

Casting Film Production Line,Film Casting Process,Casting Film Line,Transparent Film Line

Yangzhou Yuyang Nonwoven Machinery Co., Ltd , https://www.yy-machinery.com