Are pull down faucets good?
Pulldowns are excellent choices for deep, single basin sinks. Pullout Faucets have shorter spouts, and the hose is longer than pulldowns. They can quickly fill pots and pans from your countertop rather than in the sink. These faucets are suitable for shallow, double basin sinks.
Do pull down faucets break easily?
Kitchen Faucets with pull-out sprays are highly versatile, offering a whole extra level of flexibility for washing, rinsing or any other task you need to do. However, as with anything with extra moving parts, they are also more susceptible to wear and tear than regular faucets.
Our company have gravity casting machines, CNC machines, grinding flats, high-precision measuring instruments and processing equipments. We also employ a large quantity of technical personnel and management personnel and a very professional sales team which will always respond to your queries immediately. Our products mainly are Basin Faucets , kitchen faucets, Shower Faucets and other sanitary ware accessories. Furthermore, we have already passed ISO9001: 2015. "Gain development by quality, Win customer by reputation" is always our aim while coordinated with our clients and has been leading us to the exportation of all over the world.
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Improvement of the processing method of the forming cutter back
The tooth profile of a specific product from our company requires shaping using a forming cutter, as shown in Figure 1. Traditionally, the back of such cutters is produced through reciprocating cutting on a shovel lathe. However, this particular forming cutter has a width of 40 mm, and it comes with strict contour and dimensional tolerance requirements. If we were to machine it using a shovel lathe, multiple tools would be needed, and transferring between them would complicate the process. The arc-shaped surface transitions between sections would also be hard to detect accurately. Due to the high tolerance required for the tooth profile, the conventional method of producing the tool was not sufficient to meet the one-time forming requirement, making this approach unviable.
After considering alternatives, the company decided to collaborate with a professional **tool** manufacturer to customize the **tool**. After two weeks, the foreign **tool** arrived at the factory. Upon inspection, we noticed that the back of the **tool** was created using a CNC grinding machine, resulting in a multi-segment wave-like shape (achieved by shaping the grinding wheel, as seen in Figure 2). The cross-sectional dimensions and tolerances met the design specifications, with a 12-tooth round jump of only 0.03 mm. Overall, the precision was excellent. During trial production in the workshop, the products met the process requirements. However, a major drawback became apparent: the cutting edge width was only 0.1 mm, causing the **tool** to wear quickly and requiring frequent resharpening. Unfortunately, our factory's existing equipment could not handle the resharpening of the back, and the **tool** had to be sent back to the manufacturer for specialized grinding, which was time-consuming and not suitable for mass production.
Given the high output demand, tight schedule, and heavy workload, the company decided to take on the challenge internally. After discussions, they opted to replace the traditional method with CNC milling to process the **tool**'s back. The first hurdle was accurately drawing a three-dimensional view of the **tool**. By consulting technical data, it was determined that the back projection followed an Archimedes spiral, ensuring that any cross-section maintains a consistent angle after cutting, allowing for re-grinding of the rake angle. Initially, a single-tooth drop of 5.5 mm was used based on standard practices. Using the polar coordinate equation of the Archimedes spiral, Ï = Ïâ‚€ + aθ, where Ïâ‚€ = 35.679 and a = 9.435, a series of precise coordinates were calculated. These were then used in SolidWorks to create a detailed 3D model of the forming **tool**, as shown in Figure 4.
Next came the machining of the **tool**. First, the rotary body of the cutter section was machined on a CNC lathe to the correct size. Then, on a CNC milling machine (XT-650), an indexing head was installed to divide the **tool** into equal parts. To ensure the accuracy of the rake face, each indexing was finished with a 0.1–0.2 mm allowance. The CNC team used PowerMILL 9.0 to program the back of the **tool**. Through several simulations of different **tool** paths (see Figure 5), the optimal roughing and finishing paths were selected. The simulation results were promising, so the programming began, and a complete forming **tool** was produced in under three hours of continuous cutting. The **tool** passed all the required measurements in the quality control room.
During the first trial run, the shape and size of the formed product matched the requirements, but the surface finish was unsatisfactory. Further investigation revealed that the **tool** had a large radial runout, up to 0.08 mm. To address this, the process was refined. In the second round, the **tool**’s shape and inner hole were machined before heat treatment, improving the surface finish slightly, though not enough. After brainstorming, the team identified the root cause: the small drop of the traditional constant velocity spiral resulted in a small back angle, leading to poor chip evacuation and increased friction, which affected the surface finish.
After further research and a deeper understanding of the spiral’s characteristics, the third version of the **tool** was redesigned with a larger drop of 7 mm. The updated parameters were Ïâ‚€ = 31.666 and a = 11.671, increasing the back angle from 17° to 21°. When tested, the new **tool** produced qualified parts with significantly improved surface finish. Compared to the purchased **tool**, the size and surface roughness were comparable, but the frequency of sharpening increased from 200 pieces per session to 800, reducing downtime dramatically. Resharpening could now be done in about 15 minutes, saving valuable time and contributing greatly to the successful completion of the project.
Through this trial, the company developed a new method for manufacturing complex **tools**, enhancing both precision and efficiency. This approach proved economically beneficial and opened the door to more advanced tool-making capabilities.