Application examples of Palek AUTOFACER® anti-scraping in the steam turbine industry

INTRODUCTION: The Palek AUTOFACER® anti-scraping tool is designed and manufactured according to the processing conditions of severe interrupted cutting. The internal friction clutch ensures the accuracy and reliability of each opening and closing of the tool block, ensuring the smoothness of the cutting. With the precision of machining, an innovative tool solution that eliminates the cost of secondary operation and reduces the cost of machining parts can solve many problems encountered in the processing of the orifice plane and counterbore on the reverse side, and is the most productive. Good choice.

Since 1968, as a manufacturer of anti-scrapers, PARLEC continues its position as the world leader in the field of fully automatic anti-scraping and anti-creping. In Palek's AUTOFACER® anti-scraping technology, we pursue innovative tooling solutions that eliminate the need for secondary operating costs and reduced part processing costs. Larger anti-scratch diameters, through-hole diameter ratios, and ultra-high-precision boring tools can be solved with anti-scrapers.

First, the processing analysis of parts

In almost all major manufacturers around the world, Palek AUTOFACER® anti-scraping has a successful use case. In the following, we will use the anti-scraper of the driving form of the blade by air or coolant pressure as an example, and apply it to the exhaust hood of a steam turbine enterprise.

Figure 1 exhaust hood workpiece

First, analyze the processing scheme of the turbine exhaust hood. Figure 1 shows the 3 m high exhaust hood workpiece. The difficulty in machining is that the anti-scratch hole is located at a height of 3 meters and the operator needs to stay at the top of the workpiece. At present, the common processing method uses manual installation of the anti-scraping head to perform the reverse squeezing. The conventional processing is divided into four steps. In the first step, the shank enters the rudder position of the workpiece, and the shank passes through the bottom hole of the workpiece. The second step is to operate. The manual installation of the boring head performs the raking; the third step is to perform the anti-scratch processing and manually add the coolant; in the fourth step, the operator removes the anti-scraping head, manually removes the boring head, and the shank exits the workpiece. In the entire programming, you need to edit the program pause instruction twice. The cutting speed Vc=10 m/min, and the feed per revolution is f=0.05 mm/r.

There are three shortcomings in the processing methods of traditional tools:

1. Low processing efficiency: Manually loading and unloading the boring head from the tool into the workpiece and manually reaching the workpiece of 3 meters high, the processing completion time of one hole takes 10 minutes.

2. Poor machining accuracy: because the traditional tool does not have a full bottom hole support during cutting, resulting in positional deviation of the machined hole

3. There are safety hazards: First, traditional tools are usually arranged for 2 people in the CNC machine processing, one of them is responsible for the operation room, and the other is responsible for loading and unloading the boring head. Because the operator responsible for loading and unloading the boring head handles the cutter head back and forth on the 3 m high workpiece, the production accident is easily caused by the uncoordinated working cycle of 2 people in these processes. Secondly, the operator responsible for loading and unloading the cutter head is 3 meters. The high workpiece moves back and forth, there is a lot of personal safety; finally, because the traditional tool can not be automatically cooled during processing, the operator must be close to the rotary tool to manually add the coolant, there is also a lot of personal work. Safety.

　　

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