Explanation in detail of machining equipment and process knowle

  • Equipment for the processing of materials

    1. Conventional lathe: This type of lathe is primarily used to process rotating surfaces such as shafts, wheels, sleeves, and other similar items. In the mechanical manufacturing industry, it is the most widely used type of machine tool.
    2. Ordinary milling machine: it is capable of processing planes and grooves, various curved surfaces, gears, and other complex profiles, as well as planes and grooves.

    Grinding machine: A grinder is a machine tool used to smooth the surface of a workpiece. Grinding wheels with high speeds are used by the majority of grinders, with a few exceptions, such as ultra precision machining machine tools, abrasive belt grinders, and grinders and polishing machines, using oilstone, abrasive belts and other abrasives and free abrasives as alternatives.

     

    4) Fitter: Fitter operations include a wide range of tasks such as filing, marking, drilling, reaming, tapping and threading; scraping; grinding; correction; bending and riveting; and bending and riveting.

    5. CNC lathe: This machine is primarily used to process batch Lost Wax Casting , high-precision parts, and other similar items.
    It is primarily used for batch production, high-precision parts, complex parts, and large workpieces, among other things. 7. CNC milling machine:

    7. Wire cutting: The electrode used for slow wire walking is brass wire, and the middle wire is molybdenum wire, and the electrode used for fast wire walking is copper wire. Compared to fast wire walking, slow wire walking has higher machining precision and better surface finish. Process a few fine holes, fine grooves, and other details.

    8. Spark machine: EDM is capable of processing materials and complex-shaped workpieces that would be difficult to cut using conventional cutting methods. During the machining process, there is no cutting force applied, and there are no defects such as burrs, knife marks, or grooves. It is not affected by the hardness of the material or the heat treatment.

    The flow of the process

    It is one of the process documents that specifies the machining process and operation methods for parts. Under specific production conditions, it is necessary to write a more reasonable process and operation method into a process document in accordance with the specified form, in order to guide production. There are many processes involved in the machining of parts, and each process can be broken down into several sub-processes: installation, station, work step, and tool walking, to name a few.
    The number of processes that must be included in a process is determined by the structural complexity of the parts being processed Precision Machining, the machining accuracy requirements, and the type of production of the parts being processed. Processing techniques differ depending on the volume of production being produced.

    Process knowledge is defined as follows:
    When it comes to holes, general milling cannot be done with accuracy less than 0.05, and CNC processing is required; if the hole is a through hole, it can also be cut with a wire cutter.
    2) Wire cutting is required for the quenched finish hole; blind holes must be rough machined before quenching and finished machined after quenching. Before quenching, it is possible to drill non-precision holes in the material.
    In addition, grooves with a width less than 2mm and grooves with a depth of 3-4mm must be wire cut in order to be usable.
    In the case of quenched parts, the minimum allowance for rough machining is 0.4, whereas the minimum allowance for rough machining in the case of non-quenched parts is 0.2.
    Before plating is done, the coating thickness is generally 0.005-0.008 inches, and it must be processed according to the size of the part.

    Man-hours in the processing

    Process completion time is measured in terms of hours or minutes. It is a measure of the labor productivity of a company. The production operation plan can be planned, the cost accounting can be completed, the number of machines and employees can be determined, and the production area can be planned in accordance with the time quota. Process specifications are therefore incomplete without consideration of the time quota.

     


    When determining the time quota, consideration should be given to the production technical conditions of the enterprise, so that the majority of workers can achieve it through efforts, some advanced workers can exceed it, and a small number of Precision Machining can achieve or approach the average advanced level through efforts.

    The time quota is revised on a regular basis in order to maintain the average advanced level of the quota in conjunction with the continuous improvement of the enterprise's production technical conditions. The time quota is usually determined by a combination of process personnel and workers, who pool their previous experience and consult relevant technical data to arrive at a final decision. Alternatively, it can be calculated through comparative analysis using the time quotas of similar workpieces or processes, or it can be determined through measurement and analysis of actual operation time.

    It is the amount of time spent by employees familiarizing themselves with process documents, receiving blanks, installing fixtures, adjusting machine tools, dismantling fixtures, and so forth. The time spent cutting the metal is referred to as the fundamental time.