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A kind of grinding roller preparation method

A technology of grinding rollers and metal casting molds, which is applied to manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of slow heat dissipation of sand molds, and achieve the effects of prolonging service life, easy realization and simple operation.

Active Publication Date: 2017-03-08
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

m 7 C 3 Type carbides are rod-shaped. Experiments show that the hardness parallel to the rod-shaped direction is lower than that perpendicular to the rod-shaped direction. Therefore, if M 7 C 3 If the rod shape is perpendicular to the surface of the grinding roller, the wear resistance will be greatly improved, but due to the slow heat dissipation of the sand mold in sand casting, M 7 C 3 The rod distribution is random and does not have M 7 C 3 Rod orientation distribution condition

Method used

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  • A kind of grinding roller preparation method
  • A kind of grinding roller preparation method
  • A kind of grinding roller preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Such as figure 1 As shown, a tapered grinding roller is prepared, and the mold used is composed of a metal mold 4 , a sand mold and a sand core 10 , wherein the sand mold includes an upper box 2 and a lower box 6 . Its preparation method is as follows:

[0017] Firstly, the metal casting slab is poured with ductile iron material, and the surface of the cavity of the slab and the upper and lower surfaces are turned to obtain the metal casting mold 4 . The shrinkage rate is calculated as 2%. The upper box 2, the lower box 6 and the sand casting core 10 of the mold are respectively bonded with zircon sand and 5% water glass, and CO 2 hardening. Moreover, the parting surfaces of the upper box and the lower box and the metal mold are evenly distributed with four pad irons 3 respectively, and the mold is provided with an inrunner 7, a runner 8, and a runner 7 communicating with the casting cavity 5. Sprue 11 and riser 1. The surface of the cavity of the metal mold is coat...

Embodiment 2

[0022] Such as figure 2 As shown, the tire-shaped grinding roller is prepared, and the mold used is made up of metal casting molds 4 and 4 ', sand casting molds, and sand casting cores 10, wherein the sand casting molds include upper box 2 and lower box 6. Its preparation method is as follows:

[0023] Firstly, cast a metal casting slab with ductile iron material, and the surface of the cavity of the casting slab and the upper and lower sides are turned to obtain the metal casting mold 4, 4'. The shrinkage rate is calculated as 2%. The upper box 2, the lower box 6 and the sand casting core 10 of the mold are respectively bonded with zircon sand and 5% water glass, and CO 2 hardening. Moreover, the parting surfaces of the upper box and the lower box and the metal mold are evenly distributed with four pad irons 3 respectively, and the mold is provided with an inrunner 7, a runner 8, and a runner 7 communicating with the casting cavity 5. Sprue 11 and riser 1. The surface of...

Embodiment 3

[0028] Such as image 3 As shown, the segmented grinding roller is prepared, and the mold used is composed of a metal mold 4 , a sand mold and a sand core 10 , wherein the sand mold includes an upper box 2 and a lower box 6 . Its preparation method is as follows:

[0029] Firstly, the metal casting slab is poured with ductile iron material, and the surface of the cavity of the slab and the upper and lower surfaces are turned to obtain the metal casting mold 4 . The shrinkage rate is calculated as 2%. The upper box 2, the lower box 6 and the sand casting core 10 of the mold are respectively bonded with zircon sand and 5% water glass, and CO 2 hardening. Moreover, four shims 3 are evenly distributed on the parting surface where the lower box contacts the metal mold, and the mold is provided with a sprue 11 and a riser 1 communicating with the casting cavity 5 . The surface of the cavity of the metal mold is coated with graphite powder quick-drying paint, the surface of the ca...

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Abstract

The invention discloses a preparation method of a grinding roller. The preparation method of the grinding roller comprises the following steps: (1) manufacturing a metal casting mold in contact with a using surface of the grinding roller, manufacturing a mold cavity of the metal casting mold by machining, and brushing graphite powder fast dry paint on the surface of the mold cavity; (2) manufacturing a sand mold cast mold and a sand mold cast core which are in contact with a non-using surface of the grinding roller, are combined with the metal cast mold and are used for preparing the grinding roller, and brushing zircon powder fast dry paint on the mold cavity surfaces of the sand mold cast mold and the sand mold cast core; and (3) preheating the metal cast mold, and assembling the mold and pouring rapidly, thereby obtaining the grinding roller after a poured metal liquid is condensed and cooled. According to the method, the metal casting mold is adopted as the casting mold contacting the using surface of the grinding roller, and the other parts of the grinding roller are prepared by sand molds, therefore, the method is simple to operate, easy to implement, is beneficial for reducing waste sand discharge, the accuracy of the using surface of the grinding roller is greatly improved, the distribution of high-chromium iron carbides is improved, the abrasion resistance of the grinding roller is improved effectively, and the service life of the grinding roller is prolonged.

Description

technical field [0001] The invention relates to a method for preparing grinding rollers suitable for industrial equipment such as mines, electric power, cement and metallurgy. Background technique [0002] Grinding rollers are key components of grinding equipment in fields such as electric power, mining, cement, and metallurgy. The annual domestic demand is nearly 100,000 tons. At present, the casting molds used in the production of grinding rollers at home and abroad are all sand molds, and the amount of sand used to produce each ton of grinding rollers is about 4 tons, and nearly half of the sand cannot be reused and discharged. Therefore, the domestic annual production of grinding rollers uses about 400,000 tons of sand, and about 200,000 tons of waste sand is discharged, which has a great impact on the environment. Due to the compactness of sand casting, the surface of the casting is rough, even some are uneven, the grinding roller is unstable during use, and the vibrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/28C22C38/56
Inventor 郑开宏王海艳王秀连王娟王顺成李继林
Owner GUANGDONG INST OF NEW MATERIALS