What does faucet hole fit mean?
The standard size of a faucet's hole is proportional to the water flowing from the water tanks. Most manufacturers create faucets with an ideal hole size of 1 3/8 inches or 34.925 millimeters. But some Kitchen Faucets may require a broader hole that is 1.5 inches.
What is a 2 hole faucet?
A 2-hole sink usually has one hole for a single-hole faucet and a second hole for an accessory, such as a soap dispenser or sprayer. This sink might also be a bar or prep sink.
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.
Double Hole Faucet, Double Hole Kitchen Mixer Taps, Kitchen Taps Double Hole, Antique Brass Basin Taps, Double Hole Bathroom Faucet Kaiping Jianfa Sanitary Ware Co.,Ltd. , https://www.jfsanitary.com
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 the contour and dimensional tolerance requirements are quite strict. If we were to machine it using a shovel lathe, multiple cutters would be needed, and transferring between them would be time-consuming. The arc-shaped surface transitions between sections would also be difficult to detect accurately. Given the tight tolerances required for the tooth profile, the traditional method of producing the cutter couldn't meet the one-time forming requirement, so this approach was not viable.
Another solution involved sourcing a custom tool from a professional manufacturer. After about two weeks, the foreign tool arrived at the factory. Upon inspection, we noticed that the back of the tool was shaped using a CNC grinding machine, resulting in a multi-segment wave-like pattern (as seen in Figure 2). The cross-sectional dimensions and tolerances met the design specifications, and the 12-tooth round jump was only 0.03 mm, indicating high precision. During trial production, 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 wasn’t capable of handling the back grinding, so the tool had to be sent back to the manufacturer for specialized grinding. This process was both time-consuming and inefficient for mass production.
Considering the large output volume, tight schedule, and heavy workload, the company decided to tackle the issue internally. After discussions, they opted to change the traditional manufacturing process and use CNC milling to produce the back of the tool. The first challenge was to accurately draw a three-dimensional view of the tool. By consulting technical data, we determined that the rear projection trajectory followed an Archimedes spiral, which ensures that each cross-section maintains a consistent angle after cutting. This allows for regrinding of the rake angle if necessary. 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, with Ïâ‚€ = 35.679 and a = 9.435, we calculated a set of continuous coordinates. These were then used in SolidWorks to create a detailed 3D model of the forming tool (see Figure 4).
Next came the machining process. First, the CNC lathe was used to shape the rotary body of the cutter. Then, on the CNC milling XT-650 workbench, an indexing head was installed to divide the tool into equal segments. To ensure the accuracy of the rake face, each segment was finished with a 0.1–0.2 mm allowance. The CNC team used PowerMILL 9.0 to program the tool’s back, testing various tool paths (as shown in Figure 5) before finalizing the roughing and finishing paths. The simulation results were promising, so the programming was carried out, and the forming cutter was completed in under three hours of continuous cutting. The final product passed all measurements in the quality control room.
During the first trial run, the shape and size of the formed cutter met the requirements, but the surface roughness of the processed parts was unsatisfactory. Further investigation revealed that the tool had a significant runout, up to 0.08 mm. To address this, we revised the process. In the second round, we machined the tool’s shape and inner hole before heat treatment, which improved the surface finish slightly, but not enough. Through brainstorming, the root cause was identified: the small drop of the traditional Archimedes spiral led to a small back angle, which caused poor chip evacuation and friction, resulting in inconsistent surface finish. After reviewing literature and deepening our understanding of the spiral characteristics, we increased the drop from 5.5 mm to 7 mm, recalculating the spiral parameters to Ïâ‚€ = 31.666 and a = 11.671. This increased the back angle from 17° to 21°. The new tool was tested, and the results were excellent—surface roughness improved significantly. Compared to the purchased tool, the performance was comparable, but the sharpening frequency increased from 200 pieces per sharpening to 800, reducing downtime by over 75%. Sharpening could now be done in just 15 minutes, greatly improving efficiency.
Through this trial, the company discovered a new way to manufacture complex tools. The developed process effectively enhanced the precision and efficiency of processing complex-shaped cutters, offering substantial economic benefits.