Heat-resistant anti-attrition high-strength milling cutter blade for heavy cutting

A high-strength, milling blade technology, applied in the direction of milling cutting blades, milling cutters, milling machine equipment, etc., can solve the problems of tool wear, loss of tool change, large and frequent cutting parameters, etc.

Pending Publication Date: 2021-07-30
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength milling blade for heavy-duty cutting, heat-resistant and wear-reducing, which mainly solves the problem of serious tool wear and loss due to large cutting parameters in the process of heavy-duty milling of water chamber heads and large difficult-to-machine parts. Problems such as frequent tool changes and low processing efficiency

Method used

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  • Heat-resistant anti-attrition high-strength milling cutter blade for heavy cutting
  • Heat-resistant anti-attrition high-strength milling cutter blade for heavy cutting
  • Heat-resistant anti-attrition high-strength milling cutter blade for heavy cutting

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 and Figure 7 As shown, a heat-resistant and wear-reducing high-strength milling insert for heavy-duty cutting, the insert body is in the shape of a square truss. The insert has a double rake angle structure, the cutting edge is provided with a negative chamfer structure, and a circular arc edge (1) transition is provided between two adjacent negative chamfer cutting edges (7); The boss (4), the center of the quadrilateral boss (4) is machined with fastening screw holes (2) for connecting with the milling cutter disc along the thickness direction of the blade; the upper surface of the quadrilateral boss (4) is fastened with screw holes (2) Cooling grooves (13) are arranged on the outer periphery, and the cooling grooves (13) are octagonal in shape.

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 As shown, the first rake face (6) of the blade is provided with elliptical wear-reducing protrusions (8) in different directions, and the distance between the long axis of the elliptical wear-reducing protrusion (8) and the negative chamfer cutting edge (7) It forms an included angle of 45°, and when the main deflection angle of 45° is formed during the cutting process, the direction of the major axis of the elliptical wear-reducing protrusion (8) is the same as the feeding direction of the blade. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination figure 1 , figure 2 , Image 6 and Figure 7 As shown, there is a transition plane (11) parallel to the bottom surface of the blade connecting the first rake face (6) and the second rake face (12). A micro-groove (10), the micro-groove (10) has a right-angle structure; the micro-groove (10) is provided with a right-angled double-row distributed circular micro-groove texture (9). The micro-groove (10) can reduce the friction in the knife-chip contact area, reduce the temperature, force and stress in the knife-chip contact area, and the circular micro-groove texture (9) can effectively alleviate the bonded wear of the tool. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

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Abstract

The invention discloses a heat-resistant anti-attrition high-strength milling cutter blade for heavy-duty cutting, and belongs to the field of heavy-duty cutting. The problems of serious blade damage, low machining efficiency and the like caused by severe change of alternating heat-mechanical load borne by the blade in the process of heavy milling of large parts of the water chamber end socket can be solved. Cutting edges of the blade are provided with negative chamfering structures, and adjacent cutting edges are in arc edge transition; the blade is provided with a double-front-angle structure; the first front cutter face is provided with an oval anti-attrition protrusion. a transition plane is arranged at the position where the two front cutter faces are connected; a micro-groove is formed in the position, close to the tool nose, of the transition plane, and a circular micro-groove texture is arranged in the micro-groove; a triangle-like protrusion is arranged in the near area of the tool nose; a quadrilateral boss is arranged on the upper bottom surface of the blade; a fastening screw hole is formed in the center of the quadrilateral boss; a cooling groove is formed in the upper surface of the quadrilateral boss; a chip containing groove is formed among the side face of the quadrilateral boss, the side face of the triangle-like protrusion and a second front tool face; and an oval microgroove texture is arranged on the rear blade face of the blade. The heat-resistant anti-attrition high-strength milling cutter blade is used for cutting a water chamber end socket as a typical difficult-to-machine material.

Description

technical field [0001] The invention relates to a heat-resistant and wear-reducing high-strength milling blade for heavy-duty cutting, which belongs to the technical field of heavy-duty cutting. Background technique [0002] The head of the water chamber is a key part of the steam generator of the nuclear island nuclear power plant. It is made of 508Ⅲ steel forging blanks on heavy-duty machine tools. There are many processing defects on the surface to be processed, such as forging cracks, metal inclusions, and forging shovel grooves. Wait. The heavy-duty cutting parameters are far greater than the conventional cutting parameters, and the thermal-mechanical load on the tool is also greater than that of conventional cutting. The original micro-damage structure of the tool material continues to accumulate and evolve under the cyclic thermal-mechanical load during cutting, which eventually leads to excessive cutting of the tool. Early wear and damage; at the same time, under th...

Claims

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Application Information

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IPC IPC(8): B23C5/20
CPCB23C5/20B23C2200/0455B23C2200/081B23C2200/086
Inventor 程耀楠丁娅盖小羽关睿金英博
Owner HARBIN UNIV OF SCI & TECH
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