Method for machining inverse counter bore and chamfer angle by using two-step cutter bar
A processing method and a tool holder technology, applied in the field of mechanical processing, can solve problems such as incomplete product processing and insufficient processing height, and achieve the effects of simple structure, good processing stability, and low processing cost
Inactive Publication Date: 2011-01-26
云嘉集团有限公司
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Problems solved by technology
At that time, the existing conditions - only the vertical machining center equipment, the working height from the table to the spindle was 600mm, which could not meet the processing height, so the processing of this product could not be completed with ordinary processing technology without other suitable equipment
Method used
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Embodiment 1
[0010] Such as figure 1 , 2 As shown, 1 is the AV9-CA4GA9 engine-oil pan, put the oil pan 1 on the processing fixture 6, (1) first adjust the rough boring of the φ22.8 hole, and connect the thread locking extension rod 2 and the machine tool spindle as a whole , one end of the thread locking extension rod 2 is connected with the boring bar 3 as a whole, the diameter of the boring bar 3 is 14mm, and there is a 2mm gap with the φ16 hole of the product; the distance from the boring head 4 to the center of the bar is 4.25mm, measured with a vernier caliper, Make the tool meet the size requirements; the rough boring process steps are as follows: (A) first process the φ16 hole with an extended φ16 milling cutter to ensure that the thread locking extension rod 2 can pass through the φ16 hole safely; (B) the thread locking extension rod 2 passes through the milling hole The collet is connected to the spindle of the machining center machine tool, and then enters the φ16 hole from the ...
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Abstract
The invention relates to a method for machining an inverse counter bore and a chamfer angle by using a two-step cutter bar. The method is characterized by comprising the following steps of: machining a phi16 hole with an elongated phi16 milling cutter so as to ensure that a screw thread-locked extension rod can pass through the phi16 hole safely; connecting the screw thread-locked extension rod to a machine tool main shaft of a processing center through a milling chuck and allowing the screw thread-locked extension rod to enter the phi16 hole from the upper end of the phi16 hole on a product; allowing an adjusted heavy boring cutter bar to enter the phi16 hole from the lower end of the phi16 hole, connecting the adjusted heavy boring cutter bar with the screw thread-locked extension rod and locking the cutter bar with a spanner; starting a rough machining program and stopping the main shaft when the machining is finished; and realizing the coaxiality of the boring cutter bar and the screw thread-locked extension rod with the machine tool main shaft through a shaft hole fit clearance of between 0.005 and 0.01 and controlling the error to be phi 0.005, wherein a precision boring hole is formed in the same way as the chamfer angle. Vertical machining equipment is provided and working height is low. Simultaneously, the method has the advantages of simple structure, simple machining process, stable product quality and low machining cost.
Description
Technical field: [0001] The invention relates to a processing method for processing countersunk holes and chamfers with a two-stage cutter bar, which belongs to the field of mechanical processing and is suitable for single-piece or small-batch production. Background technique: [0002] The 2009 trial production project of the Technology Center of China FAW Group Corporation: AV9-CA4GA9 engine, one of which is 1009011-62K oil pan. There is a slender oblique hole in the inner cavity of the oil pan, and a counterbore and chamfer at the inner end of the hole. At that time, the existing conditions - only the vertical machining center equipment, the working height from the table to the spindle was 600 mm, which could not meet the processing height, so the processing of this product could not be completed with ordinary processing technology without other suitable equipment. In this case, a method of machining countersunk holes and chamfers on a vertical machining center with a two-...
Claims
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Login to View More IPC IPC(8): B23P15/00B23B35/00
Inventor 李双凤韩振涛
Owner 云嘉集团有限公司