CN110370165A - A kind of planet abrasive disc of wear-resistant - Google Patents

Abstract

A novel wear-resistant planetary grinding disc of the present invention belongs to the technical field of cemented carbide composite sheet processing, and consists of a grinding disc (1) and a grinding chassis (2); 10 to 36 discs are evenly distributed on the grinding disc (1). The wear-resistant plastic rings (3) are tightly nested inside each through hole; the grinding chassis (2) has the same number of counterbores as the number of through holes on the grinding faceplate (1), and each counterbore , a cylindrical diamond composite sheet (4) is brazed; at the same position on the grinding chassis (2) and the grinding faceplate (1), there are respectively three or more than three screw holes (5) so as to screw the Both are fixed. When the invention is used to process hard materials, the working time can be effectively reduced, diamond abrasives can be saved, manpower and material resources can be saved, and product quality can be improved.

Description

A New Wear-resistant Planetary Grinding Disc

technical field

The invention belongs to the technical field of cemented carbide composite sheet processing, and specifically relates to a novel wear-resistant planetary grinding disc, in particular to a planetary grinding disc containing diamond composite sheets and wear-resistant plastic parts, which is applied to diamond composite sheets, cubic nitrogen A tool for surface grinding of superhard materials such as boron compound sheets.

Background technique

At present, the diamond/cubic boron nitride composite sheet is sintered together with diamond micropowder or cubic boron nitride and cemented carbide substrate (tungsten carbide-cobalt alloy) under high temperature and high pressure, and the upper part is diamond/cubic boron nitride polycrystalline layer. The working layer has ultra-high hardness and ultra-high wear resistance, and the lower part is hard alloy. During the production and processing of diamond/cubic boron nitride, a very important step is to grind the diamond/cubic boron nitride polycrystalline layer flat. Diamond/cubic boron nitride composite sheets are mainly cylindrical products, which are generally processed in batches by using planetary grinding discs and diamond abrasives. The grinding disc generally uses an iron disc, which is cheap and easy to process. However, since the matrix of the diamond/cubic boron nitride composite sheet is cemented carbide, its hardness is much higher than that of the iron disk. When the planetary grinding disc is working, the diamond/cubic boron nitride composite substrate will have relative rotational friction with the grinding disc, which will make the depth of the round hole of the grinding disc continuously deepen, resulting in a large difference in the grinding height of the product, and the consumption of the grinding disc is very large. Change the grinding disc regularly. Therefore, in order to improve the processing stability of products, reduce the consumption and replacement of grinding discs, save costs and improve efficiency, it is necessary to solve the problem of grinding disc wear.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the background technology and provide a brand new grinding disc containing diamond composite sheets and replaceable wear-resistant plastic parts to effectively solve the problem of grinding disc wear, improve production efficiency and save costs , and can reduce the problem of non-uniform product processing size caused by grinding disc wear.

Above-mentioned technical problem realizes by following technical scheme:

A new wear-resistant planetary grinding disc, consisting of a grinding faceplate 1 and a grinding chassis 2, the grinding chassis 2 is at the bottom of the grinding faceplate 1, and the two are tightly fixed and combined by screws; it is characterized in that the grinding The faceplate 1 and the grinding chassis 2 are coaxial cylindrical, the outer diameter of the grinding faceplate 1 is 200-380mm, the inner diameter is 80-200mm, and the outer diameter of the grinding chassis 2 is 40-100mm smaller than the outer diameter of the grinding faceplate 1, The inner diameter is 40-180 mm; there are 10-36 evenly distributed through holes on the grinding faceplate 1, the axis of each through hole is parallel to the axis of the grinding faceplate 1, and the wear-resistant plastic ring 3 is tightly nested inside each through hole, To protect the side wall of the through hole, the height of the wear-resistant plastic ring 3 is the same as that of the through hole, and the outer diameter of the wear-resistant plastic ring 3 is the same as the diameter of the through hole; The counterbore with the same number of through holes, the counterbore and the through hole are coaxial one by one, the diameter of the counterbore is the same as the inner diameter of the wear-resistant plastic ring 3, and a cylindrical diamond composite sheet 4 is brazed in each counterbore, The diamond composite sheet 4 is composed of a substrate and a diamond polycrystalline layer. The substrate is brazed downward in the counterbore, the diamond polycrystalline layer is upward, and the part exposed to the grinding chassis 2 has the same height. The grinding chassis 2 and the grinding faceplate 1, there are also three or more than three screw holes 5 so that the two are fixed with screws.

The wear-resistant plastic ring 3 is preferably made of polytetrafluoroethylene or ultra-high molecular weight polyethylene.

Described through hole is preferably evenly arranged along a circle on grinding faceplate 1, and the radius of described circle is 110mm, and the center of circle is on the central axis of described grinding faceplate 1, and the spacing of any two through holes is greater than 1mm.

The outer diameter of the wear-resistant plastic ring 3 is preferably 23 mm, and the inner diameter is preferably 19.3 mm; the diameter of the diamond compact 4 is preferably 19 mm.

The outer diameter of described grinding faceplate 1 is preferably 290mm, the inner diameter is preferably 150mm, and the height is preferably 14mm; the outer diameter of described grinding chassis 2 is 250mm, the inner diameter is 120mm, and the height is preferably 8mm.

Beneficial effect:

The present invention uses a diamond composite sheet as the bottom of the grinding disc to increase the wear resistance and hardness to ensure a high degree of product uniformity. The wear-resistant plastic ring protects the inner diameter of the grinding hole from being unchanged and can be replaced after long-term use with simple steps. After strengthening the key parts of the grinding disc, the grinding process of the diamond/cubic boron nitride composite sheet is more stable, the product is highly uniform, the working time is reduced, the diamond abrasive is saved, the manpower and material resources are saved, and the product quality is improved.

Description of drawings:

Fig. 1 is a schematic diagram of a diamond compact according to the present invention.

Fig. 2 is a schematic diagram of the wear-resistant plastic ring of the present invention.

Fig. 3 is a schematic diagram of a grinding chassis according to the present invention.

Fig. 4 is a schematic diagram of a grinding faceplate according to the present invention.

Fig. 5 is an overall schematic diagram of the present invention.

Detailed ways

Example 1

In conjunction with accompanying drawing, illustrate the concrete structure of each part of the present invention:

The diamond composite sheet 4 with an outer diameter of 19.00 mm and a height of 5 mm in Fig. 1 is brazed on the grinding chassis 2. The outer diameter of the grinding chassis 2 is 250 mm, the inner diameter is 120 mm, and the thickness is 8 mm. The center of each counterbore is 110 mm away from the center of the grinding chassis 2 , The diameter of the counterbore is 19.30mm, the depth of the counterbore is 3.0mm, and the number of the counterbore is 24, evenly distributed on the same circle, as shown in Figure 3. Nest the wear-resistant polytetrafluoroethylene plastic ring 3 with an outer diameter of 23 mm and an inner diameter of 19.30 mm in Fig. 2 in the through hole of the grinding faceplate 1, the outer diameter of the grinding faceplate is 290 mm, the inner diameter is 150 mm, and the thickness is 14 mm , the center of the through hole is 110mm away from the center of the grinding disk, the diameter of the through hole is 23mm, and the number of through holes is 24, which are evenly distributed on the same circle, as shown in Figure 4. Combine the grinding chassis 2 in FIG. 3 and the grinding faceplate 1 in FIG. 4 according to the one-to-one correspondence between the counterbores and the through holes, and the one-to-one correspondence between the screw through holes 5, and fix them with screws, as shown in FIG. 5 .

Using the wear-resistant planetary grinding disc of this invention saves an average of 35% of diamond abrasives compared with the original process, reduces the grinding time by more than 20%, and reduces the product scrap rate by 60%. The traditional planetary grinding disc cannot be used for three months and must be replaced, while the new wear-resistant planetary grinding disc can still be used for more than one year without replacement.

Claims (5)

1. a kind of planet abrasive disc of wear-resistant is made of, the grinding bottom grinding floral disc (1) and grinding chassis (2) Disk (2) is tightly fastened combination using screw in the bottom of grinding floral disc (1), the two；It is characterized in that, the grinding floral disc (1) and grinding chassis (2) be coaxial cylindrical shape, grinding floral disc (1) overall diameter be 200~380mm, interior diameter be 80~ 200mm, the overall diameter for grinding chassis (2) is 40~100mm smaller than the overall diameter for grinding floral disc (1), and interior diameter is 40~180mm； There are 10~36 equally distributed through-holes in grinding floral disc (1), the axis of each through-hole is parallel with the grinding axis of floral disc (1), Each through-hole inner tight nesting wear-resistant plastic ring (3), to protect through-hole side wall, the wear-resistant plastic ring (3) and through-hole Highly identical, the overall diameter of wear-resistant plastic ring (3) is same diameter as through hole；Have on the grinding chassis (2) and is spent with grinding The identical counterbore of number of openings on disk (1), counterbore is coaxial with through-hole one-to-one correspondence, diameter and wear-resistant plastic ring (3) of counterbore Interior diameter is identical, and in each counterbore, soldering has cylindrical diamond compact (4), and the diamond compact (4) is by matrix It is combined with dimond synneusis layer, matrix is brazed in counterbore downwards, and dimond synneusis layer is upward, exposes grinding chassis (2) Partial Height it is identical, in grinding chassis (2) and grinding floral disc (1) at identical position, it is also each there are three or three or more Screw via hole (5) so that the two is fixed with screw.

2. a kind of planet abrasive disc of wear-resistant according to claim 1, which is characterized in that the through-hole is being ground It grinds and is arranged on floral disc (1) along an even circumferential, the radius of the circle is 110mm, and the center of circle is in the grinding floral disc (1) On central axes, the spacing of any two through-hole is greater than 1mm.

3. a kind of planet abrasive disc of wear-resistant according to claim 1, which is characterized in that the wear-resistant plastic The overall diameter of ring (3) is 23mm, interior diameter 19.3mm；The diameter of the diamond compact (4) is 19mm,.

4. a kind of planet abrasive disc of wear-resistant according to claim 1, which is characterized in that the grinding floral disc (1) overall diameter is 290mm, interior diameter 150mm, is highly 14mm；The overall diameter 250mm on the grinding chassis (2), it is interior Diameter 120mm, height 8mm.

5. a kind of planet abrasive disc of wear-resistant according to any one of claims 1 to 4, which is characterized in that described Wear-resistant plastic ring (3) is made of polytetrafluoroethylene (PTFE) or superhigh molecular weight polyethylene material.