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Hardened steel test piece, process testing method, design method, door milling method

A technology for process design and hardening steel, applied in metal processing equipment, measuring/indicating equipment, milling machine equipment, etc., it can solve the problems of process design conflict, no solution or multiple solutions in design scheme, inconsistent evaluation index model, etc. Time-consuming and labor-intensive effects

Active Publication Date: 2017-06-30
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The first object of the present invention is to provide a process design method for high-speed milling multi-hardness splicing hardened steel molds, which solves the problem of process design conflicts caused by the correlation of many evaluation indicators in the prior art, and the inconsistency of the evaluation index models. Leading to problems such as no solution or multiple solutions in the design scheme, the optimal process scheme can be obtained in the parameter domain of high-speed milling of hardened steel

Method used

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  • Hardened steel test piece, process testing method, design method, door milling method
  • Hardened steel test piece, process testing method, design method, door milling method
  • Hardened steel test piece, process testing method, design method, door milling method

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Embodiment 1

[0114] This embodiment provides a multi-hardness splicing hardened steel concave curved test piece, which is spliced ​​by 5 Cr12MoV quenched parts, 1 7CrSiMnMoV part and 1 45# steel part; The radius distribution is 1100mm, 1500mm and the concave curved surface is distributed along the width direction of the specimen with a curvature radius of 800mm, and it is composed of a 35mm deep polygonal annular concave surface; the upper surface of the specimen is distributed with 4 kinds of hardness, respectively HRC30~35 , HRC40~45, HRC50~55, HRC60~65; the hardness of the middle part of the test piece is HRC50~55;

[0115] For the specific structure of the specimen, see Figure 1-Figure 4 :

[0116] (1) The test piece is a cuboid structure composed of 7 parts, with an outline size of 400mm×300mm×147mm, such as figure 1 , figure 2 , image 3 , Figure 4 shown;

[0117] (2) The seven parts that make up the test piece are part 1, part 2, part 3, part 4, part 5, part 6, and part 7; ...

Embodiment 2

[0134] This embodiment relates to the cutting path design and cutting area division scheme of the milling cutter of the hardened steel concave mold test piece.

[0135] Using three kinds of milling cutter cutting paths, 15 kinds of cutting areas with the characteristics of machining surface curvature and hardness variation were designed on the upper surface of the specimen; among them, the parallel milling cutter cutting paths along the direction of the length of 400mm of the specimen were divided into 6 different Machining the cutting area where the surface curvature and hardness change; along the parallel milling cutter cutting path in the direction of the width of 300mm of the test piece, divide 7 kinds of cutting areas with different machining surface curvature and hardness change; milling cutter cutting along both sides of the polygonal annular concave surface The path divides two cutting areas with different machining surface curvature and hardness changes.

[0136] As s...

Embodiment 3

[0143] This embodiment relates to the design of an experimental program for performance testing of a high-speed milling hardened steel die milling cutter.

[0144] (1) The experiment uses two identical two-tooth indexable high-speed ball-end milling cutters with a diameter of 20mm and an overhang of 75mm installed with coated carbide inserts. On a five-axis CNC machine tool UCP710, the The cutting path of the parallel milling cutter in the direction of 400mm and the alternate milling method of forward and reverse milling, using two identical milling cutters with a speed of 2000rpm and a feed speed of 2000mm / min and a milling cutter with a speed of 4000rpm and a feed speed of 2200mm / min respectively, Cut 5 cutting areas with different surface curvature and hardness changes, conduct high-speed ball-end milling cutter vibration, surface roughness, and milling cutter wear and damage test experiments, and verify the use of this specimen to test high-speed ball-end milling cutters fo...

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Abstract

The invention relates to a quenched steel test piece, a process detecting method, a design method and a vehicle door milling method. A process design method for milling a multi-hardness spliced quenched steel mold with high speed solves the problem of process design collision caused by coorelation of multiple evaluation indexes in the prior art through a method of using a test piece for detecting and comprehensively evaluating. The detecting method uses the surface curvature of the test piece and the hardness change feature to detect a milling cutter, and solves the problem of difficult guarantee of the product surface quality. The test piece has the characteristics of multi-curvature change and multi-hardness part combination, and reduces the problem of damage of a mold profile caused by damage of the milling cutter. Through the difference between the rotating speed and the feeding speed, the vehicle door concave mold milling method shortens the machining time, reduces the cutter number, reduces the machined surface roughness, and improves the machining precision.

Description

technical field [0001] The present invention relates to a method for detecting the high-speed milling process scheme of a hardened steel die, and also relates to a process design method for splicing hardened steel concave curved test pieces with multiple hardnesses for detection and high-speed milling of a hardened steel die, and A car door milling method. Background technique [0002] Automobile door panel molds are mainly made of alloy cast iron 7CrSiMnMoV (HRC30-35) and hardened steel Cr12MoV (HRC40-65), which require high surface quality. This type of mold belongs to the mold with flat surface features, that is, the radius of curvature of the surface during cutting processing is large, and the inclination angle of processing is small. During the cutting process, it is mostly reflected in the cutting of the bottom edge. It cannot meet the requirements of long-stroke and long-term continuous processing of large-scale surface processing. When the milling cutter is worn or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C3/20B23Q17/09B23Q17/12B23Q17/20
CPCB23C3/20B23Q17/0995B23Q17/12B23Q17/20B23Q2717/006
Inventor 姜彬姚贵生
Owner HARBIN UNIV OF SCI & TECH
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