On December 19th, 2012, the SAIC Iveco Hongyan Commercial Vehicle Co., Ltd. accessories center library meeting was held in Chengdu Jinniu Hotel. The sales department's after-sales service department and 19 national library representatives attended the meeting.
The meeting was chaired by Guo Chan, Deputy Manager of Parts Supply Department. Luo Fuan, the manager of accessories supply department, summarized the sales of accessories in 2012, and detailedly analyzed the accessories business policies and work arrangements for 2013. Luo Fuan conducted an in-depth analysis of the procurement, inventory, terminal sales, and parts delivery of all parts and accessories in 2012, and began to plan and arrange various work in 2013. He explained the 2013 Business Policy for Accessories. At the time, it highlighted the highlights of the 2013 policy, including the credit policy for parts, return policy, and parts warranty policy. Luo Fuan put forward the 2013 work plan: optimize the management process, establish a management system, strengthen the management of the central library; establish a service system to ensure the bottom stock, and conduct daily monitoring, improve the direct satisfaction rate of end-user parts supply; establish a vulnerable regional center Library compensation policy to enhance the supply capacity of spare parts in disadvantaged regions; Establishing an accessory transfer platform to make full use of the existing inventory of the network to revitalize the funds of network members and reduce the inventory overstock; Strengthen market research and competitive product analysis, timely adjust prices and business policies, and expand The original genuine parts of the competitive advantage and market share; increase business training efforts, improve the central library business capabilities; focus on the layout of the accessories export business, to improve the border warehouse accessories, especially the border trade city export capacity.
Afterwards, Du Quanchao, the manager of Technical Support Department, introduced the newly launched SIS system and exchanged views with the participants on the current problems in system operation. Xie Xiaoming, customer service manager, talked with everyone about current customer service issues.
Zhang Li, director of the after-sales service department, gave a concluding speech to the morning meeting and expressed his approval and encouragement for the sales of accessories in 2012. At the same time, he also pointed out the deficiencies in the work of accessories in 2012. The variety is irrational and the turnover rate is low; there is less communication between the parts supply department and some service providers. Subsequently, Zhang Li conducted trials on the recovery of old and old three-packages for the central bank in Shanxi and Guangzhou, as well as spare parts reserve and service work for new products such as the Jie Ling M100LNG model, wide body tipper and C13 engine in 2013. Elaboration and requirements.
In the afternoon, the meeting carried out heated and in-depth discussions on accessory credits, old parts recycling, three-packs of accessories, parts packaging, parts shipments, and operation conditions in various regions. The centers actively responded to their own situations and urgently needed solutions. Recommendations and other aspects of the post-sale service to make suggestions, director Zhang Li and office managers also conducted a positive answer and careful records, discussions lasted more than 3 hours, and finally ended in warm applause.
After the discussion, all participants were organized to visit the Chengdu Central Library. Other regional center libraries conducted field visits and studies from venue construction, image display, warehouse layout, and personnel management. During the visit, there were other central libraries for the Chengdu Center. The library put forward suggestions for improvement. Chairman Zhao Fuquan and Huang Mingbiao, general manager of the Quanzhou National Association of Fujian Province, shared about the parts sales, management experience, and analysis of the accessories market in 2013. The whole day's meeting ended in a relaxed and pleasant atmosphere.
Through this conference, we not only summarized the work of accessories in 2012, but also more importantly enhanced the communication and exchange between SIH and the central bank and each central bank, fully responding to and reinforcing the concept of “one family†proposed by Xiong Gong. In 2013, SIH and the central bank and service providers will surely unite, strengthen their confidence and work together for the goal of "concentrate, peer, and win!"
Injection Molding
What is Precision CNC Milling
In general, computer numerical control milling machine (CNC) machining is a deductive manufacturing technique that programs 3-axis linkage, complex to 5-axis linkage, drives milling cutters to remove layers from solid blocks called blanks to produce finished parts. CNC milling is one of the main types of CNC Machining, which uses cutting tools that rotate at a speed of several thousand to tens of thousands of revolutions per minute (RPM) to precisely remove materials to obtain parts with complex surfaces. In addition to milling, CNC machining is also equipped with drills, boring tools, thread cutters and other tools to complete different part features at once. CNC machining produces parts based on a computer-aided design (CAD) model that is sent to a CNC machine through computer-aided manufacturing (CAM) software.
CNC Machining centers developed from CNC milling machines. The biggest difference compare to CNC milling machines is that the machining center has the ability to automatically exchange machining tools, by installing tools for different purposes on the tool magazine, the machining tools on the spindle can be changed through the automatic tool changing device in a single clamping device to achieve a variety of machining functions.
|
CNC Milling Finish
|
|
Process
|
Roughness Ra(um)
|
|
Cylindrical milling cutter milling (rough)
|
12.5~3.2
|
|
Cylindrical milling cutter (fine)
|
3.2~0.8
|
|
Cylindrical milling cutter (precision)
|
0.8~0.4
|
|
Cylindrical milling cutter (rough)
|
12.5~3.2
|
|
Cylindrical milling cutter milling (fine)
|
3.2~0.8
|
|
Cylindrical milling cutter milling (precision)
|
0.8~0.4
|
|
Cutter milling (fine)
|
12.5~3.2
|
|
End milling cutter (rough)
|
3.2~0.4
|
|
End milling cutter (precision)
|
0.8~0.2
|
|
High speed milling (rough)
|
1.6~0.8
|
|
High speed milling (fine)
|
0.4~0.2
|
CNC milling accuracy
CNC milling centers and high-Precision Machining centers. Ordinary machining center, resolution of 1μm, maximum feed speed of 15 ~ 25m / min, positioning accuracy of about 0μm. High-precision machining center, resolution of 0.1μm, maximum feed speed of 15 ~ 100m / min, positioning accuracy of about 2μm. Between 2 and 10 μm, with a ± 5 μm more, can be called precision grade. FCE equipped with different grade and different size CNC milling center. Take in to account into both economic and quality in parallel.
CNC Finishing surface treatment
Post-processing is the final step in the CNC machining process. In a quick guide, we offer a lot of surface treatments to complete your final parts and get them to meet strict specific requirements. It should be noted that in CNC machining, post-processing is in optional, as the quality of the machined parts is already very high.
Anodized
The anodizing process allows the part to obtain excellent corrosion resistance, increasing the hardness and wear resistance of the surface. Anodizing is also the most common pre-painting treatment, which can help the painted surface to obtain good adhesion. We typically apply two types of anodizing in our production: Type II, corrosion resistant; Type III is thicker, adding a layer of wear resistance. Both anodizing processes can achieve a variety of color effects.
Polishing
Grinding polish, it offers the fastest turnaround parts and does not require post-processing. The surface finish of the grinding part is equivalent to 125 um in Ra, and the requirements can be increased to 63, 32 or 16 um Ra. Minor tool marks may still be visible on the last part.
Powder coatings
Powder Coating is thermoplastic powder spraying directly on the processed part. The sprayed parts are then baked in an oven to form a durable, abrasion- and corrosion-resistant plastic coating. In the powder coating process, its color, brightness, surface roughness can be customized.
Shot blasting
Shot peening is the high-speed spraying of beads of different hardnesses and sizes onto the surface of the part. To get different textures and brightness of the surface. Since the surface has been hit by similar forging beads, the hardness and wear resistance of the surface have also been enhanced.
Design of CNC machining
CNC machining is a universal machining process, especially parts that can be cut and machined can be achieved through CNC, from simple shape shapes to complex curved structures. However, as with every manufacturing technique, CNC machining has some design limitations. We break them down as follows to ensure that your products are optimally designed to better fit the CNC machining process.
General Tolerance
When designing parts, the size of each part is different according to the application environment, working conditions, etc., and the requirements for the machining accuracy of the workpiece are also different. Although CNC machining can achieve very high machining accuracy, we should also be aware that demanding machining accuracy and accuracy (strict product tolerances) usually mean Longer production times and higher costs. If a specific tolerance is not specified in the product design, we recommend choosing at the following levels.
|
Permissible deviations in mm for ranges in nominal lengths
|
Tolerance Class Designation(Description)
|
|
fine
|
medium
|
coarse
|
very coarse
|
|
0.5 up to 3
|
±0.05
|
±0.1
|
±0.2
|
--
|
|
over 3 up to 6
|
±0.05
|
±0.1
|
±0.3
|
±0.5
|
|
over 6 up to 30
|
±0.1
|
±0.2
|
±0.5
|
±1.0
|
|
over30up to 120
|
±0.15
|
±0.3
|
±0.8
|
±1.5
|
|
over120upto400
|
±0.2
|
±0.5
|
±1.2
|
±2.5
|
|
over 400up to 1000
|
±0.3
|
±0.8
|
±2.0
|
±4.0
|
|
over 1000up to 2000
|
±0.5
|
±1.2
|
±3.0
|
±6.0
|
|
over 2000 up to 4000
|
--
|
±2.0
|
±4.0
|
±8.0
|
The highest precision of our equipment is 0.001, and the recommended most precise machining requirements do not exceed +/-0.005mm
Interior angle
All internal vertical edges of our products need to have rounded corners instead of right angles. This is because the tools used in CNC milling are cylindrical, which means they cannot produce inner right-angled edges. The fillet required by this process is called the inner corner fillet. When designing parts, the larger the inner corner fillet, the more efficient the production process. Because of the larger fillets, larger diameter milling cutters can be used to increase milling speed, and fewer swaps can be made to improve accuracy.
Undercut
Undercut cannot be machined with standard milling cutters, so the use of retract slots for parts should be avoided when designing CNC machined parts. In particular, for non-standard inner contour shapes, customized machining tools are required, which will greatly increase processing time and costs. Secondly, if undercut can not be avoided, due to the limited length of cnc tools, the undercut can not be too deep. If they are too deep or the location is difficult to reach, they will not be able to be produced because the CNC tool cannot reach the machining location.
Chamber wall thickness
CNC machining requires your part design to meet minimum wall thickness requirements. In general, it is recommended to choose the thickest possible and avoid very thin or characteristic walls. This is because CNC tools processing thin-walled parts will cause vibration deformation, which may cause interruptions or damage, and the size is out of specification. The standard minimum wall thickness for CNC machined metals is 0.030" (0.76 mm) and for plastics is 0.060" (1.5 mm).
Thread
When designing parts, it is useful to choose the largest possible thread size because smaller taps have a higher risk of breaking during production. If possible, avoid using deep hole threads as they lead to higher production costs, especially when custom tools are required.
Metal
In principle, materials with high hardness are easier to process because better processing accuracy can be obtained, but they are limited by the hardness of processing tools, so the hardness of the generally recommended parts is 8 ~ 60HRC, and for metal materials, the hardness is greater than stainless steel Followed by cast iron, followed by copper, and finally aluminum, while the processing of ceramics, plastics, etc. belongs to the processing of non-metallic materials. Fast production time.
Polymer
Although CNC can process thermoplastics, the material properties of polymers still have many difficulties for CNC processing. First, due to poor thermal conductivity, many thermoplastics melt or bend when in contact with CNC milling machines or drill bits. Secondly, the processing of plastics, because the hardness is low, the size accuracy caused by the knife during product clamping and processing is not high. For those parts that do not have special requirements for the strength and hardness of the metal, thermoplastics can provide a cheaper alternative.
Cost optimization of machined products
Simplify product design
Simplifying product design while taking into account functionality usually saves production time and reduces production costs. Because the manufacture of complex structures and surfaces often requires complex longer passes, more layering to obtain the same fine contour quality. This means higher production costs.
Reduce cutter changes
Using the same milling machine machining features, larger and same internal fillets, can reduce the number of tools used to reduce machining time. For example, if a workpiece needs a 10mm end face milling cutter to process some features, it also needs a spherical milling cutter to process a curved surface, and a 2mm milling cutter to process a fine groove, which will require repeated tool changes and reduce the machining efficiency
Proper material selection
The choice of raw material for machining can have a significant impact on production time and costs for CNC machining. If possible, choose a material with good processability, such as brass or aluminum. For those applications that do not require metal hardness and strength, CNC machining of engineering plastics like PMMA and ABS also helps to reduce costs because the material blank is cheaper, and the processing efficiency is higher.
Tolerance and wall thickness
Higher tolerances and thinner wall thicknesses also increase THE CORRESPONDING CNC machining costs, as it takes time to achieve higher precision cutting. If your product or component can accept a larger size range, choose a lower tolerance to reduce production time and costs. The same is true for wall thickness: a larger wall thickness margin should be chosen.
Choice of surface treatment
Surface treatment is often the final stage of the CNC machining process, which can also affect the cost of your entire project. Choosing less surface treatment for your part or product can lead to better time and cost efficiency. FCE can recommend to you how to optimize the surface treatment to balance the conflict between cost and quality according to your final needs.
FCE Machining services
FCE facilities are equipped with the most advanced and highest precision 3, 4 and 5-axis CNC machines, which allows us to complete your order in record time
1. 15+ year work experience engineers
2. Fastest 5 days delivery
3. Prototypes can be machined as quickly as 1 day.
4. More than 200 metals and plastics material available in stock
5. Tolerances as low as +-0.005mm
6. ISO 9001: 2015 certified factory
7. 40+ CNC machines
8. 50,000+ machined parts per month
We cooperated with many world top 500 companies and awarded good responds alway
Injection Molding,Plastic Injection,Plastic Molding,Custom Injection Molding
Suzhou FCE precision electronics Co., LTD , https://www.fcesz.com