Processing equipment
1. Ordinary round:
Lathes are mainly used for processing shafts, discs, sleeves and other parts with rotating surfaces. They are the most widely used type of machine tool processing in mechanical manufacturing. (Achievable precision 0.01mm)
2. Ordinary milling machine:
It can process flat surfaces, grooves, various curved surfaces, gears, etc., and can also process more complex surfaces. (Achievable precision 0.05mm)
3. Grinder
A grinder is a machine tool that grinds the surface of a workpiece. Most grinders use high-speed rotating wheels for grinding, and a few use other abrasive tools and free abrasives such as whetstones and abrasive belts, such as superfinishing machine tools, abrasive belt grinders, grinders and polishers. (Achievable accuracy 0.005mm, small parts can reach 0.002mm)
4. Fitter
Bench operations mainly include filing, sawing, creasing, drilling, reaming, tapping and threading, scraping, grinding, straightening, bending and riveting, etc.
5. CNC lathe
Mainly dealing with batch products, high precision parts, etc. (Achievable precision 0.01mm)
6. CNC milling machine
Mainly dealing with batch products, high precision parts, complex parts, large parts, etc. (Achievable precision 0.01mm)
7. Thread cutting
The electrode used for the slow wire is a brass wire and the central wire is a molybdenum wire. Slow wire processing has high precision and good surface finish. Process fine holes, fine grooves, etc. (Slow wire moving can reach accuracy of 0.003mm, medium wire moving can reach accuracy of 0.02mm)
8. Spark machine
EDM machining can process materials and parts with complex shapes that are difficult to cut with ordinary cutting methods (such as groove corners, small holes, deformed holes, and carbide processing in molds) . There is no cutting force during processing and no burrs). or tool marks are produced. Defects such as grooves. Insensitive to material hardness and heat treatment conditions. (Achievable accuracy 0.005mm)
Process flow
Machining process specification is one of the process documents that stipulates the machining process and operation methods of parts. It is a process document that writes the most reasonable process and operation methods in a prescribed form under specific direct production conditions.
The workpiece machining process is composed of many processes, and each process can be divided into several installations, workstations, work steps and tool passes.
Which processes a process must include are determined by the structural complexity of the parts to be processed, the processing accuracy requirements, and the type of production.
Different production quantities require different processing techniques.
process knowledge
1) Holes with precision less than 0.05 cannot be milled and require CNC processing; if it is a through hole, wire cutting can also be done.
2) The fine hole (through hole) after quenching requires wire cutting processing; The blind hole requires rough machining before quenching and finishing after quenching. Non-precision holes can be placed before quenching (leaving a quench tolerance of 0.2 per side).
3) Slots with a width of less than 2mm require wire cutting processing, and slots 3-4mm deep also require wire cutting processing.
4) The minimum rough machining allowance for hardened parts is 0.4, and the rough machining allowance for unhardened parts is 0.2.
5) The coating thickness is generally 0.005-0.008, and the pre-plating dimensions should be used during processing.
Processing hours
Time quota is the time required to complete a process, which is an indicator of work productivity. Based on the time quota, the production operations plan can be organized, cost accounting can be carried out, the quantity of equipment and personnel can be determined, and the production area can be planned. Therefore, the time quota is an important element of process regulation.
The time quota should be determined based on the technological conditions of production of the enterprise, so that most workers can achieve it through hard work, some advanced workers can exceed it, and a small number of workers can reach or be close to the average advanced level. through hard work.
With the continuous improvement of technological production conditions of enterprises, time quotas are regularly revised to maintain the average advanced level of quotas.
Time quotas are usually directly estimated and determined by a combination of craftsmen and workers by summarizing past experience and referring to relevant technical information. It can also be calculated based on comparative analysis based on the time quota of parts or processes of similar products, or it can also be determined by measuring and analyzing the actual operating time.
Process labor hours = preparation labor hours + base time
Preparation hours are the time required for workers to familiarize themselves with process documents, receive blanks, install fixtures, adjust machine tools, remove fixtures, etc. Calculation method: Estimated based on experience.
The base time is the time required to cut the metal.
Estimate cost calculation method
Cost of processed parts = (material costs + processing costs) * 1.2
[1.2的系数是含管理费]
Equipment cost = (material cost of processed parts + processing fee + purchased product fee + assembly and debugging fee + design fee) * 1.2
[1.2的系数是含管理费]
Material cost = weight (density * volume) * unit price (yuan/kg)
Processing fee = processing hours * unit price (yuan/hour)
Product purchase costs in Japan (yuan) = purchase price (yen) / exchange rate
Domestic product purchase fees are based on supplier quote.
Design fee = labor hours * unit price (yuan/hour)
Quote information:
1) Tour: 60 yuan/hour
2) Milling machine: 60 yuan/hour
3) Grinding machine: 60 yuan/hour
4) Fitter: 80 yuan/hour
5) Machining center: 60-120 yuan/hour
6) CNC lathe: 60-120 yuan/hour
7) Spark machine: 80-150 yuan/hour
8) Slow thread cutting: 60-150 yuan/hour; small items start at 80 yuan, large items depending on area: 0.06-0.08 yuan/mm2
9) Fine hole discharge: carbon steel, tungsten steel, Ф0.3 and above 1 yuan/mm, Ф0.3 and below 2-3 yuan/mm and above 1.8-2 yuan/mm;
10) Management fees: cost price * 0.2
Daguang focuses on providing solutions such as precision CNC machining services (3-axis, 4-axis, 5-axis machining), CNC milling, 3D printing and rapid prototyping services.
