CN100436063C - Planetary framework diamond abrasive tools - Google Patents

Abstract

The present invention relates to a planetary mechanism diamond grinding tool, which relates to a device suitable for grinding and machining workpieces by diamond grinding wheels and provides an end surface planetary gear mechanism diamond grinding tool which has the advantages of big grinding width, high efficiency, low cost and no need of trimming means and tools to trim the grinding wheels and can continuously grind. The present invention is provided with a planetary gear mechanism, a spring clamp sleeve, a cooling pipeline, a fixed connected casing and a rotary casing, wherein the planetary gear mechanism is provided with bearings, a sun wheel, a planetary gear, a planetary shaft, nuts and a pressure cooling liquid inflow pipeline. The rotary casing is connected with a driving shaft to be whole, the bearing is arranged between the driving shaft and the fixed connected casing, the sun wheel is arranged on the driving shaft, and the driving shaft drives the sun wheel to rotate. The planetary gear is connected with the sun wheel, the bearing is arranged between the planetary shaft and the rotary casing, and the spring clamp sleeve is arranged to the output end of the planetary shaft. The cooling liquid inflow pipeline is arranged at an axial center of the driving shaft, and one end of the cooling liquid inflow pipeline is connected with a built-in cooling pipeline of the rotary casing.

Description

Planetary Mechanism Diamond Abrasives

technical field

The invention relates to a device suitable for grinding workpieces with a diamond grinding wheel, in particular to a diamond grinding tool with an end face planetary mechanism mainly used for grinding superhard materials such as special ceramics.

Background technique

Diamond grinding wheel grinding is an important part of mechanical processing. It is mainly used for processing hard material workpieces. The existing diamond grinding wheel grinding mainly uses equipment such as sintered diamond grinding wheels. The existing problems are:

1) In the process of traditional grinding with sintered diamond grinding wheel, it is necessary to regularly trim the abrasive tools many times, which not only wastes a lot of auxiliary production time, but also specially adopts certain technical means and makes some abrasive tool dressing appliances , increased labor intensity and processing costs, and reduced production efficiency. Among them, the auxiliary time for grinding tool dressing accounts for at least 30% of the entire processing time.

2) During the use period of the diamond grinding wheel, the use area of the abrasive tool is only a limited section along the width direction of the abrasive tool, that is, after a piece of abrasive tool is continuously worn and trimmed until the service life is completed, at least 60% of the abrasive must be Wasted and never participated in processing.

3) Due to the difficulty in manufacturing high-quality single-layer brazed diamond grinding wheels with good grinding performance and large shape, the size of single-layer brazed diamond grinding wheels is small, and the processing area during grinding is very limited.

The utility model patent with the notification number CN2114533 provides a diamond abrasive tool suitable for grinding refractory materials. It includes a grinding ring and a diamond grinding bar. The wedge-shaped opening of the wedge-shaped dovetail groove points to the center of the circle, and a wedge block corresponding to its structure is arranged in the wedge-shaped dovetail groove, and at least one diamond grinding bar is fixed on the wedge-shaped block.

The utility model patent with the notification number CN2747021 provides a large-scale diamond abrasive mechanism, including a roller, a center hole in the roller, a spindle and fasteners. The special feature is that the end of the center hole of the roller A shrink sleeve with a tapered exterior is provided, and the fastener is press-fitted with the end of the shrink sleeve, and the end of the central hole is provided with a corresponding taper that closely fits with the shrink sleeve.

Contents of the invention

The object of the present invention is to provide a diamond grinding wheel with end face planetary mechanism that not only has a large grinding width, high processing efficiency, and low tool cost, but also does not require any dressing means and tools to dress the grinding wheel, and can continuously grind. Tool.

The invention is provided with a planetary gear mechanism, a grinding head spring ferrule, a built-in cooling pipeline, a fixed connection housing and a rotating housing, and the planetary gear mechanism is provided with bearings, sun gears, planetary gears, planetary shafts, nuts, bearings and pressure Coolant flows into the pipes. The end of the rotating shell is connected with the input end of the drive shaft as a whole, and the input end of the drive shaft is connected with the rotating shaft of the machine tool through a coupling for revolution movement. The bearing is arranged between the drive shaft and the fixed connection shell, and the fixed connection The top of the housing is connected with the stationary part of the machine tool. The sun gear is installed on the drive shaft, which drives the sun gear to rotate. The planetary gears are connected to the sun gear and perform planetary motion around the sun gear. Bearings are installed between the planetary shaft and the rotating housing. , the spring clip of the grinding head is set on the output end of the planetary shaft protruding from the bottom of the rotating shell, which is used to clamp the grinding head. A coolant inflow pipe is arranged in the axial center of the drive shaft, and one end of the coolant inflow pipe is connected to the end of the rotating shell. The built-in cooling pipeline is connected, and the coolant flows to the end of the spring ferrule of the grinding head connected to the planetary shaft, and enters the center hole of the diamond grinding head to cool and flush the processing area of the grinding head during processing.

There may be 2 to 4 sets of planetary gears, planetary shafts and grinding head spring ferrules, which drive 2 to 4 diamond grinding heads to rotate at high speed to implement grinding.

The invention belongs to a grinding tool with a mechanical transmission structure, and is mainly used in medium and low speed grinding processing. The grinding head used is in the shape of a cylindrical tube with a wall thickness of about 0.5mm.

Compared with the existing general grinding tools, the present invention provides a dressing-free end face precision grinding technology of diamond grinding wheel, which adopts the gear transmission principle of the planetary gear train mechanism and the grinding wheel end face grinding method, and its product structure size is small, The precision is very high, and it is equipped with high-pressure water flushing and cooling in the inner flow channel, which avoids the clogging of the abrasive tool, the influence of the falling abrasive particles on the surface of the workpiece and the overheating of the cutting heat. The abrasive tool uses the self-sharpening behavior of the thin-walled cup-shaped diamond grinding wheel in the end grinding after the abrasive grains are worn and broken to produce new abrasive grains, which maintains the relative stability of the abrasive grain density on the working surface of the grinding wheel and maintains the self-sharpening sharpness of the grinding wheel Sex, avoiding the dressing and sharpening of diamond grinding tools with special dressing technology. It can be used only by slightly modifying the installation part on the existing machine tool.

The invention provides a high-efficiency processing method with a large grinding width for the precision grinding of superhard material products such as special ceramics. By virtue of the planetary movement of the thin-walled cup-shaped diamond grinding wheel installed on the planetary gear mechanism, the grinding width of the processed product is increased, and the processing efficiency is also greatly improved. The planetary shell and the planetary grinding head each select the appropriate speed, and the end face planetary gear mechanism grinding head can completely replace the existing parallel grinding wheel to grind the plane of the workpiece and the open curved surface of the larger workpiece.

The invention enables the abrasive grains to be more fully and rationally utilized, and the method adopted makes the abrasive wear layered along the axial direction, so the abrasive grains on the abrasive tool are more rationally and fully utilized, and the cost of the tool is reduced.

The dressing-free planetary grinding tool technology proposed by the present invention is completely suitable for replacing large-sized inner and outer circular grinding wheels, and realizes high-efficiency and precise grinding of generally larger-sized superhard material products.

It can be seen that, under the condition that the diamond grinding head has self-sharpening characteristics, the present invention has a large size range of the processed workpiece, convenient and flexible operation, avoids frequent dressing of abrasive tools, improves the production efficiency of abrasive tool processing, and reduces production assistance. time.

Description of drawings

Fig. 1 is a schematic structural view of a mechanically driven end face planetary structure grinding tool according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the three-dimensional structure of FIG. 1 .

Fig. 3 is a schematic diagram of the structure of a cup-shaped diamond grinding head.

Detailed ways

The following embodiments will further illustrate the mechanical transmission type end surface planetary structure grinding tool of the present invention in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, the present embodiment provides a grinding tool for a mechanical transmission type face planetary gear mechanism. The present invention is provided with a planetary gear mechanism, a grinding head spring ferrule 10, a built-in cooling pipeline 14, a rotating housing 1, a fixed connection housing 2, and the like. The planetary gear mechanism is provided with a bearing 3, a sun gear 4, a planetary gear 5, a planetary shaft 6, a nut 7, a bearing 8, and a bearing 9. The top of the rotating housing 1 is connected and integrated with the input end of the drive shaft 12. The input end of the drive shaft 12 is connected to the rotating shaft of the machine tool through a coupling for revolution movement. The bearing 3 is arranged on the drive shaft 12 and the fixed connection housing 2, the top of the housing 2 is fixedly connected to the stationary part 13 of the machine tool. The sun gear 4 is set on the driving shaft 12, and the driving shaft 12 drives the sun gear 4 on the input shaft end of the rotating housing 1 to rotate. The planetary gear 5 is connected to the sun gear 4 and performs planetary motion around the sun gear 4, and the planetary shaft 6 is connected to the planetary gear 5. A bearing 8 is provided between the planetary shaft 6 and the rotating housing 1, and a grinding head spring ferrule 10 is installed on the output end of the planetary shaft 6 for clamping the grinding head 11. A coolant inflow pipeline is provided at the axis of the drive shaft 12 and communicates with the built-in cooling pipeline 14 on the rotating housing 1. The high-pressure coolant flows into the closed cooling pipeline and directly leads to the center hole cooling pipe of the planetary shaft 6. Road, and injected into the inner hole of the grinding head from the end of the planetary shaft 6, to achieve the purpose of cooling in the grinding process.

The rotating housing 1 is respectively provided with three planetary shafts 6 and three grinding head spring ferrules 10, which correspondingly drive the three diamond grinding heads to perform high-speed self-rotation motion to implement grinding processing.

Fig. 3 provides a schematic diagram of the structure of a cup-shaped diamond grinding head compatible with the present invention. The grinding head used is in the shape of a cylindrical tube with a wall thickness of about 0.5mm. There is a diamond abrasive layer 16 on the shank 15 of the grinding head, and the central hole 17 is the inlet of the pressure cooling liquid.

Claims (1)

1. diamond abrasive tool with planet mechanism, it is characterized in that being provided with planetary gears, bistrique spring cutting ferrule, built-in cooling tube, fixedly connected housing and roll-shell, planetary gears is provided with bearing, sun gear, planetary gear, planet axis, nut, bearing and cooling fluid flow ipe, the top of roll-shell links to each other with the lower end of driving shaft and is integral, the upper end of driving shaft connects with the rotating shaft of lathe by shaft coupling does revolution motion, bearing is located at driving shaft and is fixedlyed connected between the housing, the top of fixedly connected housing and the stationary part of lathe link, sun gear is located on the driving shaft, driving shaft drives sun gear and rotates, planetary gear connects the motion of sun gear transmission and does planetary motion around sun gear, establish bearing between planet axis and the roll-shell, the bistrique Spring Card is sheathed on the planet axis output that stretches out the roll-shell end, establish the cooling fluid flow ipe at the driving shaft centre of gyration, pressure cooling fluid flow ipe puts through to the bistrique Spring Card in the diamond grinding head mesopore of installation, man-hour the bistrique machining area is cooled off and washes away adding; Planet axis in the planetary gears and planetary gear are provided with 2～4 covers.

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