High precision hard alloy small round knife machining process

A cemented carbide, processing technology, applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the inconsistency between the sharpness and toughness of the knife edge, the hardness of cemented carbide is low and not wear-resistant, and the product quality is not easy to control. and other problems, to achieve the effect of small flatness, low impurity content and high hardness

Active Publication Date: 2015-03-25
技锋精密刀具(马鞍山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the high production cost of sintered hard alloy in the prior art, the product quality is not easy to control, the existing graphite flat boat affects the quality of the finished product, the hard alloy used for the small round knife has l

Method used

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  • High precision hard alloy small round knife machining process
  • High precision hard alloy small round knife machining process
  • High precision hard alloy small round knife machining process

Examples

Experimental program
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Effect test

Embodiment 1

[0063] A kind of high-precision cemented carbide small round knife machining process in this embodiment, such as figure 1 As shown, the steps are:

[0064] Step 1. Ingredients: prepare various cemented carbide powders: tungsten carbide, spherical cobalt powder and chromium carbide with the following formula: the mass ratio of tungsten carbide, spherical cobalt powder and chromium carbide is: tungsten carbide 80%, spherical cobalt powder 19.3%, chromium carbide 0.7%;

[0065] Step two, ball mill mixing:

[0066] A, in ball mill, add alcohol 56L of 99% purity, 2.4 kilograms of No. 58 paraffin molding agents and the prepared powder of step 1 in the ball mill;

[0067] B. Start the ball mill, and under the action of the ball stick in the ball mill, grind and mix evenly to form a slurry;

[0068] Step 3. Drying: transfer the slurry to a vacuum drying furnace for drying, and after drying, it becomes irregular particles. The alcohol recovery device is connected to the vacuum dryin...

Embodiment 2

[0090] A kind of manufacturing process of cemented carbide in the present embodiment, the basic steps are the same as in Example 1, the difference is that: in step 1, tungsten carbide, spherical cobalt powder and chromium carbide are formulated with the following formula: tungsten carbide, spherical cobalt powder, chromium carbide The mass ratio is: tungsten carbide 85%, spherical cobalt powder 14.5%, chromium carbide 0.5%; the powdered material after wiping and sieving described in step 4 is 180 orders; in the step 6, graphite flat boat was incubated for 5 hours during calcination, The specifications are 450mm*450mm*6mm and 450mm*300mm*7mm. The weight parts of the special coatings are: 1.5 kg of PEG4000, 1 kg of graphite milk, 1.5 kg of high wear-resistant carbon black, 0.5 kg of ultra-fine alumina, Tween 80 is 0.95 kg, purified water is 4 kg; the specifications of the cemented carbide semi-finished products to be sintered in step 7 are 40 pieces of 320mm*320mm*2.0mm, 200 piec...

Embodiment 3

[0093] A kind of manufacturing process of cemented carbide in the present embodiment, the basic steps are the same as in Example 1, the difference is that: in step 1, tungsten carbide, spherical cobalt powder and chromium carbide are formulated with the following formula: tungsten carbide, spherical cobalt powder, chromium carbide The mass ratio is: tungsten carbide 89.6%, spherical cobalt powder 10%, chromium carbide 0.4%; step 2, adding 39L of alcohol with 99% purity and 1.67 kg of No. 58 paraffin molding agent in the ball mill mixing; The final powdery material is 120 meshes; in the step 6, the graphite flat boat is kept warm for 3 hours during calcination, and the specification is a round graphite flat boat of ￠450mm*6mm. The respective weight parts of the special coating are: PEG40002.0 kg, graphite 1.5 kg of milk, 1 kg of high wear-resistant carbon black, 0.75 kg of superfine alumina, 0.7 kg of Tween 80, and 5 kg of purified water; pieces; the specifications of the worki...

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Abstract

The invention discloses a high precision hard alloy small round knife machining process and belongs to the technical field of hard alloy cutter production. The process includes steps of material preparation, ball mill mixing, drying, sieving, stamping, graphite plate boat pretreating, stacking, sintering, inner circle machining, outer circle processing, plane processing, large blade machining and small blade machining, special painting usage, high-purity graphite plate boat usage and comprehensive usage thereof. The sharpness and roughness of a hard alloy small round knife, stability of quality and qualified rate are guaranteed, and the purpose of improving hard alloy product quality is achieved; by the aid of the process, the human safety of operators can be guaranteed, environment pollution is avoided, the producing efficiency can be improved by 50%, and the equipment investment can be reduced as compared with that of same productivity; since a recovery comprehensive utilization device is arranged, resource can be saved, production cost can be reduced, and market competitiveness can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of production of cemented carbide cutting tools, and more specifically relates to a high-precision machining process for small round carbide cutting tools. Background technique [0002] Cemented carbide was introduced into my country in the 1960s, and today my country has become the world's largest producer and consumer of cemented carbide. Carbide products have excellent performance comparable to diamonds, bringing higher quality and benefits to people's lives, and have penetrated into all aspects of people's lives. Now the demand for cemented carbide is increasing, but the production process of cemented carbide is relatively complicated, with high technical content and high production cost. Reducing production costs and improving product quality are the key to improving the market competitiveness of cemented carbide. The requirements for each process of cemented carbide production are particularly high. ...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F1/00B22F3/16B23P15/00
Inventor 李光明
Owner 技锋精密刀具(马鞍山)有限公司
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