CN102302961A

CN102302961A - Novel grinding wheel of rice milling machine for testing

Info

Publication number: CN102302961A
Application number: CN201110153730A
Authority: CN
Inventors: 董德良; 王柯; 张华昌; 毛根武
Original assignee: CHENGDU GRAIN STORAGE RESEARCH INSTITUTE STATE ADMINISTRATION OF GRAIN RESERVE
Current assignee: CHENGDU GRAIN STORAGE RESEARCH INSTITUTE STATE ADMINISTRATION OF GRAIN RESERVE
Priority date: 2011-06-09
Filing date: 2011-06-09
Publication date: 2012-01-04

Abstract

The invention relates to a novel grinding wheel of a rice milling machine for testing. The noel grinding wheel is a core component of the rice milling machine used in a preparation of a sample when a head milled rice rate and other quality indicators are tested in a paddy quality test, that is to say the grinding wheel of the rice milling machine for testing. The grinding wheel of the rice milling machine for testing is composed of two big parts of a base body and a grinding layer, wherein the base body is a disk-shaped metalwork; the grinding layer is arranged on the working face of the base body; and the grinding layer with a thickness of 0.04-0.15mm is arranged on the on the working face of the base body and formed by covering diamond or cubic boron-nitride particles on the working face of the base body by using the traditional electroplating technical process. According to the novel grinding wheel provided by the invention, machining precisions and outline dimensions of all produced grinding wheels are ensured to achieve consistency; the diamond or cubic boron-nitride particles covered on the grinding layer after shaped are finer and more uniform, so that a brown rice stress is uniform in a milling work process and broken rice is less; the service life of the grinding wheel is greatly prolonged because the grinding layer formed from the diamond or cubic boron nitride particles is not easy to drop off due to the adoption of the electroplating process; when the grinding wheel is used on the rice milling machine for testing the paddy quality, the consistency of the length of the milling time, head milled rice rate, milled rice yield and other indicators is better, so that the test result accuracy, consistency and stability are ensured; and the standardization of equipment of the rice milling machine for testing can be realized.

Description

A kind of novel check rice mill emery wheel

Affiliated technical field

The present invention relates to a kind of in the paddy quality testing process, during quality index such as test head rice rate etc., the core component of employed rice mill---check rice mill emery wheel.The peeling that it is applicable to brown rice in the quality of rice testing process processing of milling.

Background technology

At present, when in China's paddy quality detects, preparing sample, the brown rice that needs to use rice mill that hulling machine is hulled out is removed the peel the processing of milling, and detects polished rice rate index.Be about to the ratio that brown rice is ground to whole grain Mi Suozhan after certain machining accuracy, and estimate the grade of paddy, so the quality of rice mill milling efficiency has directly determined final evaluation result according to the size of its index.Yet current check all is to be formed by material monolithic sintering such as carborundum, corundum with the employed emery wheel of the brown rice of milling on the rice mill.Existing actual the use in the operating process; There is following problem in this integral sintered emery wheel that forms: owing to the reason of whetstone property certainly; The sand grains of wheel face can come off in mill processes gradually; The appearance and size of emery wheel diminishes, the sharpness variation; The brown rice grinding time of same kind can be elongated; Can make that brown rice increases, finally have a strong impact on the accuracy and the stability of testing result.Secondly, because the sand grains of existing wheel face can progressively come off in mill processes, its service life is shorter; In addition; Each link is difficult to guarantee the uniformity between each emery wheel in the manufacture process of existing emery wheel; Make form accuracy, sharpness between each emery wheel there are differences; Like this when paddy quality detects; It is just different that same sample rice mill of the same race grinds the used husk rice time of same machining accuracy; Influence very much testing result, be difficult to standardization.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point of the prior art; Provide a kind of and mill evenly, crack rice and lack; Can guarantee uniformity, reliable and stable and long service life, easily manufactured, cost is low, can realize that standardized check is with emery wheel used on the rice mill.

The objective of the invention is to realize through following technical measures: this check includes matrix and grinding layer two parts with the rice mill emery wheel, and wherein matrix is the metalwork that is discoid body; And grinding layer be adopt traditional electroplating technology technology with grain size number be 30/45～140/170 diamond or cubic boron nitride particle be distributed on matrix the working face of milling on, form the grinding layer that a layer thickness is 0.04～0.15mm.

The effect covered that has that the present invention compares prior art is: the present invention adopts skive or cubic boron nitride electroplating abrasion wheel to replace the existing whole emery wheel of being made up of materials such as carborundum, corundum; Can guarantee that like this machining accuracy of the emery wheel that all are produced and appearance and size reach uniformity, avoid the precision and the big shortcoming of appearance and size difference of traditional silicon carbide grinding wheel each emery wheel when producing; And because of adopting electroplating technology, the grinding layer difficult drop-off that diamond or cubic boron nitride particle form has prolonged service life of emery wheel greatly; And emery wheel material such as the more traditional carborundum of used diamond, cubic boron nitride particle, corundum in granules is more tiny; Its moulding rear surface covers more even; Make the stressed even of brown rice in the mill processes; What produce cracks rice still less; The degree of milling is more even; When making it be used in rice and desire on the rice mill of quality testing; Index consistency such as its grinding time length, head rice rate, rice milling yield improve; Thereby can guarantee accuracy, uniformity and the stability of testing result, can realize the standardization of rice mill equipment.

Description of drawings

Fig. 1 is the construction profile figure of one embodiment of the invention.

Fig. 2 is the sectional structure chart of Fig. 1.

The figure number explanation:

1. grinding layer 2. matrixes 3. power transmission shaft installing holes

The specific embodiment

The present invention is further described below in conjunction with accompanying drawing and embodiment: this check is made up of matrix 2 and grinding layer 1 two parts with the rice mill emery wheel.Wherein matrix 2 is steel spares that are discoid body.Grinding layer 1 is on the working face of milling of matrix 2, and adopting traditional electroplating technology technology is that 80/100 diamond particles covers on the matrix equably with grain size number, forms the grinding layer of a layer thickness 0.12mm.

This check when manufacturing, at first processes grinding wheel base body in the form of annular discs 2 through machining process with the A3 steel with the rice mill emery wheel.When machining, can guarantee the appearance and size of grinding wheel base body and the endoporus fit dimension of power transmission shaft installing hole 3, and the requirements such as revolution concentricity of whole emery wheel.Defectives such as the appearance and size deviation that can avoid like this existing in the material emery wheel manufacture process such as existing carborundum is big, inside and outside circle off-centre.Secondly, in order to improve the bond strength between the basic and diamond abrasive grinding layer of emery wheel, also to carry out the pre-treatment before the diamond electroplating to the grinding wheel base body that processes.

Pretreatment procedure mainly contains:

(1) deburring: with hand file, fine sandpaper the burr on the matrix is removed, prevented that matrix surface from presenting the defective mode of dielectric.

(2) clean: with alcohol matrix is cleaned one time, tentatively removed the greasy dirt of matrix surface.

(3) be coated with insulating cement: the workpiece after will cleaning, on non-plating position, be coated with one deck fast binder, make the insulation of non-plating position.

(4) clean: need to prevent the plating position to be coated with insulating cement, with hand file or fine sandpaper polished one time in this position again, then flushing.

(5) electrochemical deoiling: workpiece is placed sodium carbonate, in NaOH, sodium metasilicate, the lauryl sodium sulfate mixed solution, cleaning about 30 minutes under 40 ℃～60 ℃ the situation.

(6) heat, cold water flush: use the hot water injection earlier, use cold water flush again, avoid degreasing fluid to get in the acid solution.

(7) pickling: with the oxide skin of 1: 1 hydrochloric acid solution removal matrix surface.

(8) cold water flush: matrix is pressed from both sides from hydrochloric acid solution, use cold water flush, dress is suspended in the electrochemical degreasing groove then.

(9) electrochemical degreasing: workpiece hangs in NaOH, sodium carbonate, the sodium radio-phosphate,P-32 solution, energized, and first cathode treatment 1 minute, anode treatment is 3 minutes then, and the current density that is adopted is 10A/dm ², electrode is a corrosion resistant plate.

(10) flushing, anode treatment: its dress is hung up properly behind the water flushing matrix, allowing needs the plating position to insert in the anode treatment liquid again, and negative pole is a copper coin, matrix just very, and current density is 25A/dm ², be 3 minutes conduction time.

Just on the working face of milling of grinding wheel base body, evenly covering the last layer grain size number through the Traditional industrial electroplating technology like this is 80/100 diamond particles.

Claims

1. novel check rice mill emery wheel; Include matrix (2) and grinding layer (1); It is characterized in that matrix (2) is for being the metalwork of discoid body; And grinding layer (1) is that to adopt traditional electroplating technology technology be that 30/45～140/170 diamond or cubic boron nitride particle are distributed on the working face of milling of matrix (2) with grain size number, forms the grinding layer that a layer thickness is 0.04～0.15mm.