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Strong scraping,do you know how to machine this internal gear?
by xiaolong luo cnc machining shop Technological advances in machining centers have paved the way for more efficient internal gear production methods – strong scraping. In addition to faster processing speeds, this process provides better processing quality at a lower cost, with a production efficiency of 4 to 10 times that of the machining gear shaping process, and it has more than the broaching process. High flexibility and processing quality.
Q: What is strong scraping?
A: Strong scraping is a continuous cutting process that completes all machining operations in one setup. It essentially combines the two processes of hobbing and gear shaping. This process produces a precision machining gear that takes much less time than other technologies and is typically four times faster than the gear shaping process. The gear teeth need to be machined by repeated strokes. This motion is a non-processable empty return after performing the cutting, while the strong scraping eliminates this unnecessary non-cutting time. Unlike the broaching process, the powerful scraping requires only one machining setup to ensure greater flexibility and quality. In contrast, the broaching process has a long tooling cycle and low production flexibility, which is a bottleneck.
Q: Today, why is the strong scraping process widely concerned in the gear processing industry?
A: The concept of strong scraping was formed as early as 1910. Since then, it has been recognized that when machining most internal gears, the production efficiency of the scraping teeth may be much higher than that of the gear teeth. However, strong scraping is only more widely used after the machining center has become more robust and rigid and the synchronous spindle has been born.
Q: What are the special requirements for strong scraping?
A: Strong scraping requires the machining center and spindle to handle highly dynamic machining conditions; it also requires a fully synchronized spindle. This means that if the part spindle reduces speed, the tool spindle responds immediately.
In the strong scraping process, the tool axis and the gear shaft are staggered, and the angle formed by the tool and the gear shaft determines the level of production efficiency. The larger the angle, the higher the production efficiency.
The right software is also important for machine control, which optimizes the efficiency of the scraping process.
Q: What are the requirements for a powerful tooling system?
A: Strong scraping requires a more efficient tool. Indexable tools increase productivity and minimize the use of overall tools in finishing. This also means minimizing the grinding frequency of the finishing tool.
Q: What parts can the powerful scraping technology be used to produce?
A: Strong scraping is suitable for the production of internal gears, shafts with internal/outer teeth, splines or individual gear parts with external splines and internal splines. It is also suitable for pre-hardening machining of internal gears and hard machining of all types of gears.
From its original conception to more than 100 years later, strong scraping has finally become a reality of productivity, thanks to advances in machine tool technology. For many types of internal gear applications, strong scraping is a significant advance in processing speed, cost and quality.
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About xiaolong luo 
cnc machining shop
23 connections, 0 recommendations, 104 honor points.Joined APSense since, May 5th, 2019, From Dongguan, China.
Created on Nov 21st 2019 20:00. Viewed 322 times.
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