What is the role and status of process specifications in machinery manufacturing

The machining process specification is a process document that stipulates the machining process and operation methods of products or parts. Therefore, the machining process regulations play an important role in machining, mainly including the following aspects:

1) The process specification is the main technical document to guide production.

Process specification. The planning and scheduling of production in the machining workshop, the operation of workers, the processing quality inspection of parts, and the accounting of processing costs are all based on process regulations. To deal with problems in production, process regulations are often used as a common basis.

If the quality accident is handled, the responsibility of the relevant units and personnel should be determined according to the process regulations.

2) The process specification is the main basis for production preparation.

When the workshop wants to produce new parts, it is necessary to first formulate the machining process specification of the part, and then prepare for production according to the process specification. For example, the analysis and study of key processes in the processing technology of new parts; Prepare the required knives, clamps, measuring tools (purchased or manufactured); procurement or manufacture of raw materials and blanks; The purchase of new equipment or the modification of old equipment must be carried out according to the process.

3) The process specification is the basic technical document of the new machinery manufacturing plant (workshop).

New (Remodeled.) When expanding) batch or large batch machining workshop (section), the type and quantity of the required machine tools and the layout of the workshop should be determined according to the process regulations, and then the area size, power and hoisting equipment configuration of the workshop and the type of work, technical level, quantity and so on of the required workers.

In addition, advanced process regulations also play a role in communicating and promoting advanced manufacturing technology. Typical process procedures can shorten the process of factory exploration and trial production. Therefore, the formulation of process regulations plays a very important role in the production and development of the factory, and is the basic technical document of the factory.

The role and status of process regulations in machinery manufacturing can be said to be the first.

The process specification stipulates the important process steps and requirements related to quality in production, so that workers can have a basis for production, and inspection can have a basis for measurement, and it can be said that the entire production process is carried out around it.

Machining includes:

Turning (vertical turning, horizontal turning): Turning is the machining of removing metal from a workpiece. While the workpiece is rotating, the tool cuts into the workpiece or turns along the workpiece;

Milling (end milling, horizontal milling): milling is the use of rotary tools to cut off metal processing, mainly used for processing grooves and shape straight surfaces, but also two-axis or three-axis linkage machining of arcs;

Boring: Boring is a processing method that enlarges or further processes the holes that have been drilled or cast on the workpiece. It is mainly used for machining holes with large shape, large diameter and high precision of the workpiece.

Planing: The main feature of planing is to process straight surfaces, and the surface roughness is generally not as high as that of milling machines;

Plunging: Plunging is actually a vertical planer, its cutter is moving up and down, which is very suitable for incomplete arc machining, mainly used for cutting certain types of gears;

Grinding (surface grinding, cylindrical grinding, internal hole grinding, tool grinding, etc.): Grinding is a processing method that uses a grinding wheel to remove metal, and the machined workpiece has an accurate size and a smooth surface. It is mainly used to finish heat-treated workpieces to achieve accurate dimensions.

Drilling: Drilling is the use of a rotary drill bit to drill holes on solid metal workpieces; When drilling, the workpiece is positioned and clamped and fixed; In addition to rotating, the drill bit also has to make a feed movement along its own axis.

Machining contains many types of machining, and the above several are the more common types of machining, which can meet the machining technology required by all workpieces at present.

1. The composition of the machining process.

1.Process - the process that the worker completes continuously on the workpiece at the place of work.

2.Installation - the content of the process completed after a clamping.

Clamping - Positioning - The workpiece occupies a correct position on the machine or fixture before machining and clamps - so that the correct position does not change.

Increase the installation error.

Increase set-up time – the number of installations should be minimized.

3 station - the position occupied by the movable part of the workpiece and the tooling relative to the fixed part of the tooling, multi-station processing - improve productivity, ensure the accuracy of the mutual position between the processing surface, 4 steps - the process completed under the condition that the machining surface and the processing tool are unchanged, a number of identical steps are continuously carried out in a single installation, 1 step is processed with several different cutters or composite tools, and the composite work step is processed.

5 passes – 1 pass per cut.

The main content of the process specification.

Product features, quality standards.

Characteristics of raw materials, auxiliary raw materials and quality standards that should be met for production.

Production process.

The main process technical conditions, semi-finished product quality standards.

The main points of the production process.

The inspection items and times of the main technical and economic indicators and the quality indicators of finished products.

The inspection items and times of the technical indicators of the work and the noise.

Characteristics and quality standards of special equipment.

According to the number of products, equipment conditions and the quality of workers, technical personnel determine the process to be adopted, and write the relevant content into process documents, which are called process regulations. This one is more targeted. Each factory may be different, because the actual situation is different.

Kiss. Dear users, the manufacturing standard of machinery manufacturing process refers to a series of specifications and standards followed in the process of machinery manufacturing to ensure that the quality and performance of products meet the requirements. These standards include, but are not limited to:

Mechanical design standards, Heshu process manufacturing standards, inspection standards, Andy Ant full standards, etc. Among them, the process manufacturing standard is the most important part of machinery manufacturing, which stipulates the specific requirements of each link of machinery manufacturing, including material selection, processing technology, processing accuracy, surface treatment, assembly requirements, etc. The formulation and implementation of process manufacturing standards can effectively improve the quality and efficiency of machinery manufacturing, reduce production costs, and improve market competitiveness.

Therefore, machinery manufacturing enterprises must strictly abide by the relevant standards to ensure product quality and market competitiveness.

1. Benchmark first.

The datum is machined out first, and then the datum is positioned to process other surfaces to ensure the processing quality.

2. Coarse first and then fine.

Rough machining is in the front, finishing is in the back, rough and fine are separated.

3. Primary first, then secondary.

The main surface is processed first, and then the secondary surface is processed, such as the main surface refers to the assembly surface and the working surface, and the secondary surface refers to the keyway and the optical hole for connection.

4. Face first and then face.

For workpieces such as boxes, brackets and connecting rods, the plane should be processed first and then the holes should be processed, because the plane profile size is larger, the plane positioning and installation are stable, and the holes are usually processed by plane positioning, so as to ensure the position accuracy of the plane and the hole.