CN101259602A - A kind of soft grinding head and its manufacturing method - Google Patents

Abstract

The invention discloses a soft grinding head, a core grinding (2) is provided with a particle grinding; the core grinding (2) adopts polyurethane rubber. Compared with the prior soft grinding head, the soft grinding head of the invention has the advantages of little grinding heat, low grinding temperature and has the advantages that work pieces are not easy to deform and cauterization is not easy to appear and defects like cracks are not easy to appear, thus obtaining better surface quality. The invention also relates to a manufacturing method of the soft grinding head.

Description

A kind of soft grinding head and its manufacturing method

technical field

The invention relates to a soft grinding head, especially a soft grinding head on an electric polishing machine, which is used for high-precision surface processing such as polishing, polishing grinding, finishing, and finishing in the manufacturing fields of machinery, hardware, molds, and automobiles. deal with. The invention also relates to a manufacturing method of the soft grinding head.

Background technique

At present, the polishing heads used in the electric polishing machine market are divided into two types: hard grinding heads and soft grinding heads. The material used for the hard grinding head is the same as that of the ordinary grinding wheel, and the amount of grinding removal during grinding is relatively large, and it is usually used for general surface processing.

The soft grinding head uses rubber as the grinding core, and the grinding removal amount is small, and it is usually used for surface finishing. It is suitable for surface finishing in machinery, hardware, automobile, mold and other manufacturing industries, such as: grinding, surface finishing, finishing, etc.

In order to keep the coaxiality of the grinding core, the rotating shaft and the main shaft of the electric polishing machine constant during the use of the soft grinding head, that is, the grinding core will not be deformed due to force and torque, the rubber used in the grinding core is relatively hard. In this way, the soft grinding head and the workpiece will still generate grinding heat during grinding. Grinding heat is the main reason affecting the accuracy of the grinding surface. Therefore, for the processing with higher surface precision, the existing soft grinding head is not suitable, and it must be replaced with a new grinding head during use or cooled before use. In addition, if the soft grinding head accumulates too much heat and its temperature rises, it will also burn off.

Contents of the invention

The invention aims to provide a new type of soft grinding head, which has lower grinding heat during use and is beneficial to improving the precision of the workpiece to be processed.

For this reason, in the soft grinding head of the present invention, the grinding core adopts polyurethane rubber, which is completely different from the used materials of the existing grinding head.

Polyurethane rubber has physical properties such as high elasticity, hardness, oil resistance, wear resistance, aging resistance, hydrolysis resistance, acid and alkali solution corrosion resistance, tear resistance, impact resistance, and strong vibration absorption. In addition, polyurethane products have excellent characteristics such as light weight, high strength, heat insulation, sound insulation, flame retardancy, cold resistance, corrosion resistance, and non-absorbent, so they are widely used in vehicle manufacturing, metallurgical manufacturing, mining machinery, construction machinery, chemical machinery, etc. industry.

Because polyurethane has good elasticity and wear resistance, the soft grinding head of the present invention belongs to flexible grinding in polishing and grinding and between workpieces, has good flexibility, and is more suitable for polishing and grinding of irregular curved surfaces.

Because polyurethane is solvent-resistant, hydrolysis-resistant, and corrosion-resistant, the soft grinding head of the present invention can still maintain a good working condition when encountering a polishing agent or grinding paste during polishing and grinding, and is more suitable for polishing and grinding.

Because polyurethane does not absorb water, the soft grinding head of the present invention is less sticky to chips than the grinding wheel in grinding, has better chip holding and chip removal conditions, and can keep the abrasive grains in a good grinding state for a long time. To ensure high efficiency and stable processing reliability.

In the soft grinding head of the present invention, the sharp edges of abrasive grains arranged on the grinding core face outward, are evenly distributed, and are closely arranged. In addition, the size of the selected abrasive grains should be basically the same, and the contour performance should be good.

During grinding, the soft grinding head of the present invention is in flexible contact with the surface of the workpiece, the load of a single abrasive particle is small and uniform, and the grinding amount is small. The sharp edge of the abrasive grain is facing the surface of the workpiece, and the friction coefficient with the workpiece is small. The heat generated during cutting is easy to dissipate, which reduces the burn, burn or deformation of the workpiece during the polishing process, and the surface quality after processing is high. , with the apparent effect of finishing treatment.

In the soft grinding head of the present invention, the abrasive grains are needle-shaped. The abrasive material can be brown corundum, white corundum, cubic boron nitride, etc. Among them, brown corundum is suitable for heavy grinding, such as: carbon steel, alloy steel. White corundum is suitable for fine grinding of hardened steel, high-speed steel, thin-walled parts, and gears. Cubic boron nitride is suitable for higher precision grinding, polishing and finishing.

According to the requirements of different workpieces or different surface precision, the soft grinding head of the present invention can also adopt abrasive grains of different shapes, different particle diameters, and different materials.

For the convenience of installation and disassembly, in the grinding head of the present invention, one end of the rotating shaft is attached to the grinding core, and the other end is in clearance fit with the inner hole of the main shaft of the electric polishing machine.

Compared with the existing soft grinding head, the soft grinding head of the present invention has less grinding heat and lower grinding temperature, and the workpiece is not easy to be deformed, burnt, cracked and other defects, and can obtain better surface quality. In addition, the soft grinding head of the present invention can also be applied to the electronic manufacturing industry, such as surface polishing of electronic components, due to its high machining accuracy.

The soft grinding head of the present invention can be used on electric tools for fine grinding processing, thereby reducing manual labor intensity, improving surface precision of workpieces, and accelerating work efficiency.

However, the abrasive core adopting polyurethane rubber is relatively soft, and it is difficult to arrange the abrasive grains according to the existing manufacturing method of the abrasive head. Otherwise, the grinding core will be damaged or the abrasive grains will fall off easily.

Therefore, the present invention also provides a method for manufacturing the above-mentioned soft grinding head: using high-voltage electrostatic adsorption of abrasive grains, and adopting electrostatic sand planting method to evenly implant abrasive grains on the surface of the polyurethane abrasive core. Among them, the electrostatic sand planting method belongs to the existing processing technology, so it will not be described in detail.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of the first embodiment of the soft grinding head of the present invention;

Fig. 2 is the structural representation of the second embodiment of the soft grinding head of the present invention;

Fig. 3 is a schematic structural view of a third embodiment of the soft grinding head of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

The soft grinding head of the embodiment shown in Fig. 1 is composed of a grinding core 2, abrasive grains 1, and a rotating shaft 3, wherein the abrasive grains 1 are needle-shaped, substantially equal in size, and implanted into the grinding core 2 uniformly and tightly.

The soft grinding head of the embodiment shown in Fig. 2, its grinding core is round head conical.

The soft grinding head of the embodiment shown in Fig. 3, its grinding core is round head cylindrical shape.

The above is a part of the embodiments of the present invention. For those skilled in the art, various changes can be made on the basis of the above-mentioned embodiments without creative work, and the purpose of the present invention can also be achieved. However, such changes should obviously be within the protection scope of the claims of the present invention.

Claims (3)

1, a kind of soft grinding head comprises core grinding (2), has abrasive particle (1) on the described core grinding (2), it is characterized in that: described core grinding (2) adopts polyurethane rubber.

2, soft grinding head as claimed in claim 1 is characterized in that: the abrasive particle (1) on described core grinding (2) is needle-like, granular size, highly consistent, and cutting edge evenly distributes outwardly.

3, a kind of method of making as claim 1 or described soft grinding head is characterized in that: utilize high-pressure electrostatic absorption abrasive particle (1), adopt the electrostatic sand-planting method, abrasive particle (1) evenly is implanted in core grinding (2) surface.

Images