Arrow stone powder metallurgy tap processing case

Release time:

2023-04-15

40CrMo heat treatment disc tap processing case.

Nanjing Arrow Pierced Stone Industry and Trade Co., Ltd.
Tap Trial Cutting Report

Customer	A Machinery Factory in Chongqing			Date	March 28, 2023		Product Figure 1
Machine Bed	Machine Type: Vertical Machining Center
	Machine spindle type: BT30
	shanks: spring collets
	Cooling type: external cooling				Machine tool cooling pressure:
Workpiece	Workpiece Name	Disc			Workpiece material	40CrMo
	Heat treatment	Yes		Hardness	HRC 28~32		Product Figure 2
	Processing procedure	Rough machining-bit point socket-drilling position brush coating-heat treatment-grinding surface-drilling-chamfering-tapping
	workpiece surface	Machined surface			Processing part map
		without interference
		Through hole
		Pre-hole	None
	Processing requirements	Bottom hole diameter	D10.8±0.01				Failure Figure 1
		Depth	Thread bottom hole depth 20MM, tapping depth 20MM
		Tool life requirements: 150 pieces * 10
Test	Contrast Brands	YG life 150-180 pieces
	Test article	Brand			Arrow Stone Product 1	Arrow Stone Product 2
	Specification Name	Product Name			Hub tap (Product Figure 1)	Hub tap (Product Figure 2)
		Product specifications			M12 * 1.25 straight groove 5P	M12 * 1.25 Spiral 5P	Failure Figure 2
	cutting parameters	Speed-N r/min			230	230
		Feed-Vf mm/min			287	287
	Results of trial cutting	Test one: tool life. Number of holes			203 workpieces * 10	12 workpieces * 10
		Failure state			Wear, not stop gauge	Front end chipped with 5 teeth, single edge band (see failure diagram 1)
		Test two: tool life. Number of holes			113 workpieces * 10	120 workpieces * 10	Failure Figure 3
		Failure state			Front end chipping with 3 teeth and 2 edges (see failure diagram 2)	Rear end chipping 1 tooth (see failure diagram 3)
conclusions and recommendations	Conclusion	Arrow stone product 1 straight groove powder metallurgy tap processing life than the current use of products increased by about 30%
	Recommendations	The anterior angle of the cusp can be slightly changed and blunt.