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Laser Repair Method of Blanking Die

A technology of laser repairing and blanking molds, which is applied in laser welding equipment, metal material coating technology, manufacturing tools, etc., can solve the problems that the service life of the mold cannot be guaranteed, the impact on the precision of the mold, and the decline in product quality can be avoided. Effects of thermal stress, uniform thickness and hardness, optimized overlap

Inactive Publication Date: 2015-08-26
SUZHOU HAIERSHI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface repair of the mold by ordinary surfacing welding method will bring disadvantages such as large deformation, insufficient hardness, and easy cracking.
Moreover, different molds should choose a more suitable repair process according to their characteristics, otherwise the service life of the mold will not be guaranteed, which will seriously affect the use accuracy of the mold and cause the quality of the produced products to decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific steps of the laser repair method of the blanking die of the present embodiment are as follows:

[0019] The first step is to treat the surface of the blanking die to be repaired, and remove the dust, oil, rust, etc. on the blanking die.

[0020] The second step is to conduct detection and analysis, record the original use conditions, hardness and mechanical performance parameters of the blanking die, detect the size of each part of the blanking die, and determine the worn parts and their wear amount.

[0021] The third step is to remove the right angle of the worn part by grinding, remove the fatigue layer of the worn part, and clean it.

[0022] The fourth step, according to the detection and analysis results of the blanking die, program the cavity of the worn part (programming can use the numerical control machining simulation system of Mitsubishi Corporation), and formulate the process parameters.

[0023] The fifth step is to surfacing the edges and co...

Embodiment 2

[0027] The rest of the laser repair method of the blanking die of this embodiment is the same as that of Embodiment 1, the difference is that: the laser power is 1200W, the spot size is 12mm×1.8mm, the distance between the laser and the object is 255mm, and the scanning The speed is 160mm / min, the overlapping amount is 4.5mm, and the powder feeding amount is 10g / min. The composition and weight percentage of the alloy powder used are C: 0.06%, Cr: 6.6%, B: 1.8%, Si: 1.2%, Mo: 0.9%, Mn: 5.8%, V: 5.3%, W: 3.4%, TiO 2 : 7.6%, the rest is Fe.

[0028] The average surface hardness of the blanking die repaired by the laser repair method of the blanking die in this embodiment reaches 57.6HRC, and the lowest hardness value among all the detection points is 55.9HRC.

Embodiment 3

[0030] The rest of the laser repair method of the blanking die of this embodiment is the same as that of Embodiment 1, the difference is that: the laser power is 1300W, the spot size is 12mm×1.8mm, the distance between the laser and the object is 260mm, and the scanning The speed is 170mm / min, the overlapping amount is 4.5mm, and the powder feeding amount is 11g / min. The composition and weight percentage of the alloy powder used are C: 0.09%, Cr: 7.6%, B: 2.2%, Si: 1.8%, Mo: 0.8%, Mn: 5.9%, V: 4.8%, W: 2.9%, TiO 2 : 6.7%, the rest is Fe.

[0031] The average value of the surface hardness of the blanking die repaired by the laser repair method of the blanking die in this embodiment reaches 57.5 HRC, and the lowest hardness value among all detection points is 56.3 HRC.

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PUM

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Abstract

The invention relates to a method for laser repair of a blanking die. The method comprises the following steps of: performing treatment and detection analysis on the surface of a blanking die to be repaired, and removing a fatigue layer at a worn part; performing build-up welding on edges and corners of the blanking die at first, then performing build-up welding on planes on the blanking die, and then performing build-up welding on steps on the blanking die, wherein the build-up welding is carried out in a preset powder feeding mode; and performing continuous lapping scanning on the blanking die by using a fast cross-flow carbon dioxide laser as a light source. Alloy powder adopted by the method comprises the following components in percentage by weight: more than or equal to 0.1% of C, 6-8% of Cr, 1.5-2.5% of B, 1-2% of Si, 0.8-1% of Mo, 5-7% of Mn, 2-4% of W, 2-6% of V, 5-10% of TiO2, and the balance of Fe. According to the method for laser repair of the blanking die, the surface of the blanking die is subjected to laser melting coating, so that the surface hardness and the size of the worn part of the blanking die meet operating requirements.

Description

technical field [0001] The invention relates to a laser cladding method, in particular to a laser cladding repair method for a mold surface. Background technique [0002] Stamping is a pressure processing method that uses a stamping die installed on a press to apply pressure to the material at room temperature to cause separation or plastic deformation to obtain the required parts. Stamping die is an indispensable process equipment in stamping production, and it is a technology-intensive product. The quality, production efficiency and production cost of stamping parts are directly related to the design and manufacture of molds. Stamping dies are divided into blanking dies, punching dies, bending dies, deep drawing dies, flaring dies, etc. according to the nature of the process. These stamping dies will inevitably wear out during the working process, but due to each die The role of each is different, the stress during stamping is different, and the degree of wear and wear c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 唐全林张智明高云飞
Owner SUZHOU HAIERSHI INFORMATION TECH CO LTD
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