CN107931449B - Surface treatment method of stamping die - Google Patents
Surface treatment method of stamping die Download PDFInfo
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- CN107931449B CN107931449B CN201711335524.6A CN201711335524A CN107931449B CN 107931449 B CN107931449 B CN 107931449B CN 201711335524 A CN201711335524 A CN 201711335524A CN 107931449 B CN107931449 B CN 107931449B
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- stamping die
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- treatment method
- surface treatment
- plasma discharge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/20—Making tools by operations not covered by a single other subclass
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Abstract
The invention discloses a surface treatment method of a stamping die, which relates to the technical field of die treatment and comprises the following steps: (1) steel shot treatment; (2) plasma discharge treatment; (3) shot blasting treatment; (4) polishing; according to the surface treatment method for the stamping die, provided by the invention, the surface hardness of the steel bullet can be effectively improved by treating the steel bullet, the activity of particles on the surface of the stamping die can be effectively improved by treating the stamping die through the plasma discharge point, so that a compact hardened layer can be obtained on the surface of the treated stamping die when shot blasting is carried out on the stamping die, the surface treatment method has strong wear resistance, corrosion resistance, thermal fatigue resistance and adhesion resistance, and the service life of the stamping die is greatly prolonged.
Description
Technical Field
The invention belongs to the technical field of die processing, and particularly relates to a surface processing method of a stamping die.
Background
A stamping die is a special processing device which applies pressure to a material to cause separation or plastic deformation of the material so as to obtain a required part or product. The stamping part has the advantages that the stamping part is generally large in production batch, the stamping working temperature is high, the surface of a stamping die is often worn, oxidized or polluted by oil, and the like, so that the quality and the appearance of a stamped workpiece product cannot reach the standard, the surface of the stamping die is effectively treated, the rejection rate of the die is reduced, the significance is high, the surface wear resistance of the existing stamping die is general, and the precision of the product can be greatly reduced after long-time working.
Disclosure of Invention
The invention aims to provide a surface treatment method of a stamping die aiming at the existing problems.
The invention is realized by the following technical scheme:
a surface treatment method of a stamping die comprises the following steps:
(1) putting the steel ball into a resistance furnace, heating to 820-850 ℃, preserving heat for 30min, then adjusting the temperature to 400 ℃, preserving heat for 15min, cooling to room temperature along with the furnace, putting the steel ball into an activating solution, soaking for 2 hours, taking out, cleaning to be neutral by using deionized water, and drying to constant weight to obtain an activated steel ball; the activating solution is prepared from the following components in parts by weight: 5 parts of phosphoric acid, 8 parts of phosphate, 3 parts of sodium molybdate, 2 parts of nitric acid, 1 part of nano silicon dioxide and 80 parts of deionized water;
(2) soaking the stamping die in cleaning solution for 10min, and treating the surface of the stamping die by plasma discharge for 5-10 min;
(3) uniformly shot blasting the surface of the stamping die by the activated steel shot obtained in the step (1) in an ultrasonic field for 30-40 s;
(4) polishing the surface of the die for 15-20min by adopting a fine grinding wheel, then cleaning for 10min by adopting deionized water, and drying to constant weight to obtain the product.
Further, the diameter of the steel ball in the step (1) is 1.2 μm.
Further, the soaking temperature in the activating solution in the step (1) is 87 ℃.
Further, in the step (1), the phosphate is sodium phosphate or potassium phosphate.
Further, the cleaning solution in the step (2) is an ethanol solution with a mass fraction of 80%.
Further, the plasma discharge in the step (2) adopts a plasma generating device, the pressure in the cavity of the plasma generating device is 120Pa, and the power density of the plasma discharge is 0.35W/cm through thin film epitaxy.
Further, the long frequency of the ultrasonic wave in the step (3) is 65 kHz.
Compared with the prior art, the invention has the following advantages: according to the surface treatment method for the stamping die, provided by the invention, the surface hardness of the steel bullet can be effectively improved by treating the steel bullet, the activity of particles on the surface of the stamping die can be effectively improved by treating the stamping die through the plasma discharge point, so that a compact hardened layer can be obtained on the surface of the treated stamping die when shot blasting is carried out on the stamping die, the surface treatment method has strong wear resistance, corrosion resistance, thermal fatigue resistance and adhesion resistance, and the service life of the stamping die is greatly prolonged.
Detailed Description
Example 1
A surface treatment method of a stamping die comprises the following steps:
(1) putting the steel ball into a resistance furnace, heating to 820 ℃, preserving heat for 30min, then adjusting the temperature to 400 ℃, preserving heat for 15min, cooling to room temperature along with the furnace, putting the steel ball into an activation solution, soaking for 2 hours, then taking out, cleaning with deionized water to be neutral, and drying to constant weight to obtain the activated steel ball; the activating solution is prepared from the following components in parts by weight: 5 parts of phosphoric acid, 8 parts of phosphate, 3 parts of sodium molybdate, 2 parts of nitric acid, 1 part of nano silicon dioxide and 80 parts of deionized water;
(2) soaking the stamping die in cleaning solution for 10min, and treating the surface of the stamping die for 5min by plasma discharge;
(3) carrying out uniform shot blasting treatment on the surface of the stamping die by the activated steel shot obtained in the step (1) in an ultrasonic field for 30 s;
(4) polishing the surface of the die for 15min by adopting a fine grinding wheel, then cleaning for 10min by adopting deionized water, and drying to constant weight to obtain the product.
Further, the diameter of the steel ball in the step (1) is 1.2 μm.
Further, the soaking temperature in the activating solution in the step (1) is 87 ℃.
Further, in the step (1), the phosphate is sodium phosphate or potassium phosphate.
Further, the cleaning solution in the step (2) is an ethanol solution with a mass fraction of 80%.
Further, the plasma discharge in the step (2) adopts a plasma generating device, the pressure in the cavity of the plasma generating device is 120Pa, and the power density of the plasma discharge is 0.35W/cm through thin film epitaxy.
Further, the long frequency of the ultrasonic wave in the step (3) is 65 kHz.
Example 2
A surface treatment method of a stamping die comprises the following steps:
(1) putting the steel ball into a resistance furnace, heating to 850 ℃, preserving heat for 30min, then adjusting the temperature to 400 ℃, preserving heat for 15min, cooling to room temperature along with the furnace, putting the steel ball into an activating solution, soaking for 2 hours, then taking out, cleaning with deionized water to be neutral, and drying to constant weight to obtain an activated steel ball; the activating solution is prepared from the following components in parts by weight: 5 parts of phosphoric acid, 8 parts of phosphate, 3 parts of sodium molybdate, 2 parts of nitric acid, 1 part of nano silicon dioxide and 80 parts of deionized water;
(2) soaking the stamping die in cleaning solution for 10min, and treating the surface of the stamping die for 10min by plasma discharge;
(3) uniformly shot blasting the surface of the stamping die by the activated steel shot obtained in the step (1) in an ultrasonic field for 30-40 s;
(4) polishing the surface of the die for 20min by adopting a fine grinding wheel, then cleaning for 10min by adopting deionized water, and drying to constant weight to obtain the product.
Further, the diameter of the steel ball in the step (1) is 1.2 μm.
Further, the soaking temperature in the activating solution in the step (1) is 87 ℃.
Further, in the step (1), the phosphate is sodium phosphate or potassium phosphate.
Further, the cleaning solution in the step (2) is an ethanol solution with a mass fraction of 80%.
Further, the plasma discharge in the step (2) adopts a plasma generating device, the pressure in the cavity of the plasma generating device is 120Pa, and the power density of the plasma discharge is 0.35W/cm through thin film epitaxy.
Further, the long frequency of the ultrasonic wave in the step (3) is 65 kHz.
Example 3
A surface treatment method of a stamping die comprises the following steps:
(1) putting the steel ball into a resistance furnace, heating to 830 ℃, preserving heat for 30min, then adjusting the temperature to 400 ℃, preserving heat for 15min, cooling to room temperature along with the furnace, putting the steel ball into an activation solution, soaking for 2 hours, then taking out, cleaning with deionized water to be neutral, and drying to constant weight to obtain the activated steel ball; the activating solution is prepared from the following components in parts by weight: 5 parts of phosphoric acid, 8 parts of phosphate, 3 parts of sodium molybdate, 2 parts of nitric acid, 1 part of nano silicon dioxide and 80 parts of deionized water;
(2) soaking the stamping die in cleaning solution for 10min, and treating the surface of the stamping die for 8min by plasma discharge;
(3) uniformly shot blasting the surface of the stamping die by the activated steel shot obtained in the step (1) in an ultrasonic field for 30-40 s;
(4) polishing the surface of the die for 18min by adopting a fine grinding wheel, then cleaning for 10min by adopting deionized water, and drying to constant weight to obtain the product.
Further, the diameter of the steel ball in the step (1) is 1.2 μm.
Further, the soaking temperature in the activating solution in the step (1) is 87 ℃.
Further, in the step (1), the phosphate is sodium phosphate or potassium phosphate.
Further, the cleaning solution in the step (2) is an ethanol solution with a mass fraction of 80%.
Further, the plasma discharge in the step (2) adopts a plasma generating device, the pressure in the cavity of the plasma generating device is 120Pa, and the power density of the plasma discharge is 0.35W/cm through thin film epitaxy.
Further, the long frequency of the ultrasonic wave in the step (3) is 65 kHz.
Comparative example 1: the only difference from example 1 is that no treatment of the steel shot was carried out.
Comparative example 2: the only difference from example 1 is that the treatment of step (2) is not conducted.
And (3) testing:
the punching dies made of the 304 stainless steel materials treated in the examples and the comparative examples are subjected to performance tests;
TABLE 1
| Surface hardness HRC | Coefficient of surface friction | |
| Example 1 | 75 | 0.012 |
| Example 2 | 76 | 0.011 |
| Example 3 | 75 | 0.012 |
| Comparative example 1 | 70 | 0.018 |
| Comparative example 2 | 62 | 0.025 |
As can be seen from Table 1, the stamping die surface treated by the method of the present invention has good hardness, low friction coefficient and good wear resistance.
Claims (6)
1. A surface treatment method of a stamping die is characterized by comprising the following steps:
(1) putting the steel bullet into a resistance furnace, heating to 820-850 ℃, preserving heat for 30min, then adjusting the temperature to 400 ℃, preserving heat for 15min, cooling to room temperature along with the furnace, putting the steel bullet into an activating solution, soaking for 2 hours, then taking out, cleaning to be neutral by using deionized water, and drying to constant weight to obtain an activated steel bullet; the activating solution is prepared from the following components in parts by weight: 5 parts of phosphoric acid, 8 parts of phosphate, 3 parts of sodium molybdate, 2 parts of nitric acid, 1 part of nano silicon dioxide and 80 parts of deionized water;
(2) soaking the stamping die in cleaning solution for 10min, and treating the surface of the stamping die by plasma discharge for 5-10 min;
(3) uniformly shot blasting the surface of the stamping die by the activated steel shot obtained in the step (1) in an ultrasonic field for 30-40 s;
(4) polishing the surface of the mold by using a fine grinding wheel for 15-20min, then cleaning for 10min by using deionized water, and drying to constant weight to obtain the product.
2. The surface treatment method for a press mold according to claim 1, wherein the immersion temperature in the activating solution in the step (1) is 87 ℃.
3. The surface treatment method of a press mold according to claim 1, wherein the phosphate in the step (1) is sodium phosphate or potassium phosphate.
4. The surface treatment method for a stamping die as defined in claim 1, wherein the cleaning solution in the step (2) is an ethanol solution with a mass fraction of 80%.
5. The method as claimed in claim 1, wherein the plasma discharge in step (2) is performed by using a plasma generator, the pressure inside the cavity of the plasma generator is 120Pa, and the plasma discharge power density is 0.35W/cm.
6. The surface treatment method of a press mold according to claim 1, wherein the ultrasonic long frequency in the step (3) is 65 kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711335524.6A CN107931449B (en) | 2017-12-14 | 2017-12-14 | Surface treatment method of stamping die |
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| CN201711335524.6A CN107931449B (en) | 2017-12-14 | 2017-12-14 | Surface treatment method of stamping die |
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| CN107931449A CN107931449A (en) | 2018-04-20 |
| CN107931449B true CN107931449B (en) | 2020-05-19 |
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| CN111940611B (en) * | 2020-08-07 | 2024-06-04 | 和县卜集振兴标准件厂 | Method for improving precision of alloy steel stamping die |
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| CN101363123A (en) * | 2008-09-24 | 2009-02-11 | 上海大学 | Composite technique of steel member surface shot-blasting and plasma low-temperature boriding |
| US7997110B2 (en) * | 2009-01-30 | 2011-08-16 | GM Global Technology Operations LLC | Cleaning dies for hot forming of aluminum sheets |
| CN102877070A (en) * | 2012-06-14 | 2013-01-16 | 浙江吉利汽车研究院有限公司杭州分公司 | Surface compound treatment method for steel mould |
| CN106555116B (en) * | 2016-11-29 | 2019-04-05 | 连云港倍特超微粉有限公司 | A kind of steel casting surface Hardening Treatment antifriction alloy shot and preparation method thereof |
| CN107313096A (en) * | 2017-08-15 | 2017-11-03 | 肥西县通力机械有限公司 | A kind of drawing mould process of surface treatment |
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Effective date of registration: 20200423 Address after: 243100 Anhui huilv Aluminum Co., Ltd. in Gushu industrial concentration zone, Dangtu County, Ma'anshan City, Anhui Province Applicant after: MAANSHAN Dongwei Aluminum Co.,Ltd. Address before: 243100 Anhui city of Ma'anshan province Dangtu County Gu Shu Zhen Industrial Zone (Anhui huilv aluminum limited company) Applicant before: MAANSHAN XINHUI ALUMINUM Co.,Ltd. |
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