Forum Replies Created
September 20, 2022 at 7:05 am in reply to: Proper quality inspection of CNC parts #2319
1 – Certifications are Important
You must look for the qualifications that any potential machining vendor has first when obtaining information about them. The ISO 9001 certification is one that is essential to look for.
A standard that outlines the specifications for quality management systems is ISO 9001. By guaranteeing top-notch machining services, a machine shop with ISO 9001 certification follows completely to statutory and regulatory regulations.
The type of CNC machining equipment that the machine shops’ facilities are equipped with must be determined after you have made sure that their certificates fit your criteria.
2- The Quality of Machined Parts Is Affected by the Type of Machining Equipment
a 5-axis CNC device
The quality of the parts you’ll receive is significantly influenced by the kind of CNC machines that are utilized to make prototype (or production) parts. There are many different types of CNC machines, and they are often categorized according to how many axes they can control, such as 2-, 3-, 4-, and 5-axis CNC machines.
5-axis CNC machines are more advanced than 2-, 3-, and 4-axis CNC machines, as one might expect. They provide greater surface polish and relational accuracy, but more significantly, they can machine complicated shapes. Although 5-axis machining (like the one shown above) is not necessary for all parts, if a part is sufficiently complex, it can be the best option.
Advanced CNC machining technology is used by third-party machining vendors in their facilities to produce high-quality machined parts. However, there are other things to watch out for when choosing a third-party machining vendor!
The level of skill of the CNC operators who will be creating your parts will also have a significant impact on the quality of the machined components.
3 – The Technician Operating the Machine Determines the Quality of CNC Machining
Even though the factory talked about certificates and cutting-edge machining technology, there have been several horror stories of clients receiving subpar and useless CNC made parts. These problems are typically linked to the CNC machine operators.
In actuality, there is a shortage of skilled CNC machine operators. Operators who have gone through the “school of hard knocks” and are prone to repeating the same machining errors are oversaturated in the machining market.
And to make matters even more difficult, a lot of machine shops don’t have a consistent quality management system to check the components that their operators or technicians are fabricating. These sellers are the ones you should avoid.
4 – Three Types of Inspection Are Performed by Top-Notch CNC Machine Shops
CMM machine used by Gensun QC Team for CNC quality control
Three types of inspections are routinely performed by top machining shops at various stages of the manufacturing project:
The machine operator does numerous article inspections while (or right away following) milling in order to spot any difficulties with tolerance. Simple measurement devices like micrometers and go/no-go gauges must be used.
Inspection using in-process probing is a term used to describe an automated method of employing programmed probes to check a part’s important characteristics and tolerances during CNC machining. These probes automatically keep an eye on the process and change the cutting tools and work coordinates as necessary.
The inspection stage is carried out on CNC machined parts by a team of quality control experts and is referred to as inspection in the quality control (QC) department. To make sure that products meet client requirements, these QC specialists use height gages, microscopes, 2D projectors, micrometers, and coordinate measuring machines (CMM). One of our Gensun QC team members is shown using a CMM machine in the image above.September 20, 2022 at 6:59 am in reply to: What is the purpose of container inspection? #2318
A container loading inspection will help who?
All importers who wish to assure the secure loading, transportation, and delivery of their goods can benefit from container loading inspections. It is useful for novice importers who want to feel comfortable with the shipping procedure or for importers of fragile items that need more intricate or specific loading requirements.
What advantages do container loading inspections offer?
A container loading inspection reduces the likelihood of an unwelcome arrival surprise. It enables you to record the condition of your items before to delivery, identify any potential problems, and take immediate action. If differences are discovered, the appropriate staff will choose what to do next.
In addition to reducing the danger of improper handling and loading of your goods, having professionals in place during the container loading procedure also reduces the possibility of theft and other unforeseen problems.September 20, 2022 at 6:57 am in reply to: Which CNC system is used for drilling operation? #2317
The first interaction between the formation and the foreign fluids and machinery occurs during the drilling process. Drilling fluids are essential to the drilling process because they cool the drilling bit, lift up the cuttings, lubricate the bottom-hole assembly, and create impermeable filter cakes. The use of drilling fluids during drilling operations can significantly modify the permeability of the formation. One of the main causes of formation damage is the impermeable filter cakes created by the drilling fluid filtrate that cannot be entirely eliminated. Drilling fluids are forced to infiltrate the reservoir formation as a result of excessive drilling and hydraulic fracturing, leaving their heavy particles on the surface of the porous media. Some drilling fluid types, like water-in-oil emulsions and inverted emulsions, feature droplets that are relatively small in size. These droplets have the potential to contaminate nearby formations and obstruct pore throats, which would reduce permeability. Moreover, the surfactant molecules that create these invert emulsion muds can quickly change the original wettability of the formation.July 22, 2022 at 11:02 am in reply to: What is the role of Container Loading Supervision in Quality Inpsection? #2091
A specific kind of inspection known as container loading supervision is carried out at the exporter’s factory when the container is being loaded.
An impartial and qualified inspector oversees the container loading process to ensure that the right amount of goods have been shipped, the condition of the container to ensure that it is suitable for the shipment, and the packaging to ensure that the goods have been packed in accordance with the specifications stated on the sales contract.July 22, 2022 at 10:58 am in reply to: What are the advantages of dimensional inspection in casting? #2090
A dimensional inspection is performed to confirm that the forging or casting are manufactured according to the design drawing that specifies the dimensions and indicates the design tolerances.
Benefits of Using 3D Dimensions Inspection: Better Quality in Less Time and at Lower Costs
Utilizing optical metrology in the manufacturing sector can assist lower the prices of scraps and manufacture parts of higher quality while cutting down on inspection time.
Castings and forgings with potential problems, such as insufficient material in crucial places and nonconformities with the CAD file, are easily identified by completing intermediate inspections—before and after machining. As a result, items of higher quality that adhere to the customer’s requirements and fall within the necessary tolerances are produced.
The manufacturing sector may immediately detect castings and forgings that lack sufficient material by inspecting them with a portable 3D scanner before and after machining. This reduces the cost of their production because these parts can be redirected and revised before investing in them further.
100% of the surfaces may be inspected in a few of seconds with an acquisition rate of half a million points per second. Additionally, moving the component to the metrology lab for inspection is no longer necessary. By using portable 3D scanners for inspections, more parts can be inspected more quickly and with more data, freeing up CMM time for more important and valued duties like final inspections.
Parts of Better Quality: Castings and forgings with potential problems, such as insufficient material in crucial regions and nonconformities with the CAD file, are easily identified by completing intermediate inspections—before and after machining. As a result, items of higher quality that adhere to the customer’s requirements and fall within the necessary tolerances are produced.
Reduced Production Costs: The manufacturing sector can quickly identify castings and forgings with insufficient material by inspecting them with a portable 3D scanner before and after machining. As a result, the cost of their production is limited because these parts can be redirected and reworked before investing in them further.
Reduced Inspection Time: With a 1/2 million point acquisition rate per second, all surfaces can be examined in a matter of seconds. Additionally, moving the component to the metrology lab for inspection is no longer necessary. By using portable 3D scanners for inspections, more parts can be inspected more quickly and with more data, freeing up CMM time for more important and valued duties like final inspections.June 16, 2022 at 2:17 am in reply to: Optimize Injection Molding Cycle Time #1881
How To Reduce Injection Molding Cycle Time? Here are 4 ways to minimize cycle time:
1. Keep wall thicknesses to a bare minimum to ensure that your item or product functions properly. Because of this minimalist approach to part design, less material will need to be injected into mold cavities, resulting in a gradual reduction in injection time (which can, over many cycles, add up to material time savings). Just keep in mind that the required strength of your product walls must be taken into account, as well as recommended design principles for minimum wall thicknesses. We’ll return to wall thickness later, as it has a significant impact on cooling time. machine for injection molding a
2. Make sure your machine is fine-tuned and capable of handling the required injection pressure and speed. Variable or uneven injection pressure and speed are common problems with older injection molding equipment (also known as fill time). This can result in situations where machines must inject more material in a longer length of time than a newer or better-maintained unit. That is to say, your cycle timings aren’t as quick as they could be. Errors in pressure or fill time might also result in more rejected parts, lengthening your production time (and create a longer effective cycle time).
3. Invest in people, not just equipment. If you talk to enough individuals in the injection molding industry long enough, you’ll ultimately hear the same adage: “It’s as much an art as a science.” Setting up a machine and letting it run isn’t enough for successful, efficient injection molding. There are numerous little adjustments and tweaks that can be performed. They can’t all be found in a book or calculated on a graph. It’s sometimes just an issue of getting familiar with a specific machine. Injection molding engineers with experience and talent will be able to spot — almost intuitively — the little changes in factors such as injection speed, cushion, holding time, and others that can have a large impact on component quality and cycle times. Some of the best people are likely to be found right in your own facility, so make sure to provide them opportunity to train others and share their skills.
4. Consider the materials you’ve chosen. Some materials have higher fill pressures or flow rates than others. They can go into the mold and fill all of the cavities quickly. Material selection is sometimes disregarded or dismissed, but do some study to see whether other resin qualities are appropriate for your part’s needs. As a result of our research, you may be able to shorten your cycle times along the road.June 16, 2022 at 2:14 am in reply to: Reliability of AQL in Quality Inspection #1880
When working with AQL tables, how confident are you?
A reader emailed me with the following query about sample strategies based on attributes:
When using the AQL Tables, what is the “Confidence Level”?
Is there a formula we can use to figure out what the confidence levels are?
That is an excellent question. When it comes to statistics, a confidence interval is frequently mentioned. “90% of the time, the value will be between 34.5 and 66.0,” for example.
In principle, I suppose the AQL tables’ values might be used in the same way. There is a formula (but I don’t know anyone who wants to mess about with a hypergeometric distribution – that’s some serious math).
The statisticians who created MIL STD 105 (which later became ISO 2859-1, ASQ-ANSI Z1.4, and other standards) used a different perspective and proposed that we think about it differently.
The operational characteristic curves – visual representations of the distribution — are included in the ISO 2859-1 standard.May 11, 2022 at 3:14 am in reply to: What are the 7 qc tools used in quality management? #1731
The 7 QC tools are thought to have been introduced by Kaoru Ishikawa in postwar Japan, and were inspired by the seven renowned Benkei weaponry. Benkei was a Japanese warrior monk who carried seven weapons and set out on a personal mission to steal 1,000 swords from samurai soldiers he considered haughty and dishonorable.
A series of lectures on statistical quality control given by Dr. W. Edwards Deming to a group of Japanese scientists and engineers in 1950 impacted Ishikawa. Unfortunately, most workers were overwhelmed by the subject’s intricacy, so Ishikawa concentrated on a smaller set of tools that would suffice for most quality-related difficulties.January 25, 2022 at 9:04 am in reply to: Why get third-party Coordinate Measuring Machine (CMM) service for your business #1266
With ever-increasing quality standards, it is more important than ever to have a system capable of highly accurate and repeatable measurements with an extremely high throughput. What is the IPQCCO difference? Simple. Many CMM manufacturers outsource all manufacturing of their part components to third parties worldwide and then simply assemble their machines domestically. These competitors rely heavily on today’s software compensation to manipulate accuracy.