CN216577381U

CN216577381U - Grinding head

Info

Publication number: CN216577381U
Application number: CN202120286094.9U
Authority: CN
Inventors: 彭富国
Original assignee: Hunan Anguan Intelligent Technology Co ltd
Current assignee: Hunan Anguan Intelligent Technology Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2022-05-24
Anticipated expiration: 2031-02-01

Abstract

The utility model discloses a grinding head, which comprises a grinding part, wherein the grinding part comprises a first elastic part and a first polishing part, and the cross section of the first elastic part is circular; the first polishing part is adhered below the first elastic part or integrally formed with the first elastic part; the lower surface of the first polishing portion protrudes downward.

Description

Grinding head

Technical Field

The utility model relates to the technical field of polishing, in particular to a grinding head.

Background

The polishing of various electronic equipment glass can be divided into two parts of plane polishing and edge polishing, wherein, the polishing of the edge part adopts the brush plate at present, the brush plate covers the glass plate and rotates relatively, the polishing of the edge part of the glass is realized, the polishing efficiency of the polishing mode is lower, the polishing effect is not ideal, the utilization rate of the brush plate is lower, the consumption of the brush plate (consumable material) is large, the edge polishing cost is high, and therefore, the prior art needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a grinding head, and aims to solve the problem that the polishing efficiency of the edge position of glass is low in the prior art.

In order to achieve the above object, the grinding head provided by the present invention for polishing an edge portion of a workpiece includes a grinding portion including a first elastic portion and a first polishing portion, the first elastic portion having a circular cross section; the first polishing part is adhered to the lower part of the first elastic part or integrally formed with the first elastic part; the lower surface of the first polishing portion protrudes downward.

Preferably, the grinding part further comprises a connecting part to connect the grinding head to a driving mechanism.

Preferably, the connecting portion is connected to the first elastic portion, and the connecting portion adopts a double-sided tape to bond the grinding portion to the driving mechanism.

Preferably, the connecting portion is connected to the first elastic portion, and the connecting portion adopts a hook and loop fastener to bond the grinding head to the driving mechanism.

Preferably, the thickness of the connecting part is between 0.8mm and 2.5 mm.

Preferably, the magic tape is provided with a hook face part and a hair face part, and the hair face part is made of cloth cover-based electrostatic flocking.

Preferably, the rough surface part is adhered to the grinding part through a hot melt adhesive film.

Preferably, the hot melt adhesive film is a copolyamide adhesive film or a copolyester adhesive film.

Preferably, the area density of the hot melt adhesive film is between 30 grams per square meter and 70 grams per square meter.

Preferably, the grinding head has a central bore.

Preferably, the diameter of the central hole is between 5mm and 40mm, and the outer diameter of the first elastic part is between 45mm and 160 mm.

Preferably, the first elastic part is a sponge layer, and the density of the sponge layer is 45-95kg/m³And the hardness of the first elastic part is between Shore F and 70-95 degrees.

Preferably, the first elastic part is an EVA layer, and the hardness of the first elastic part is Shore C, and is 18-40 degrees.

Preferably, the first elastic part is a composite layer of EVA and PU.

Preferably, the polishing surface is tapered or curved, and the ratio of the height of the polishing surface to the diameter of the first elastic part is 0.15-0.5.

Preferably, the hardness of the first polished section is within the range of Shore C, 40-90 DEG, and the thickness of the first polished section is within the range of 0.5mm-4 mm.

Preferably, the lower surface of the first polishing part is provided with a gap or a shallow groove, and the radial included angle between the gap or the shallow groove and the first polishing part is not more than 80 °.

Preferably, the grinding head further comprises a second elastic part and a second polishing part, the second elastic part is positioned above the first elastic part, and the second polishing part is fixed on the outer circumferential surface of the second elastic part or integrally formed with the second elastic part.

Preferably, an outer diameter of the second polishing section is greater than or equal to an outer diameter of the first polishing section.

Preferably, the hardness of the second elastic part and the hardness of the second polished part are both within the range of shore C, 40-60 °, and the hardness of the second polished part is greater than the hardness of the second elastic part.

Preferably, the polishing device further comprises a third polishing part, wherein the third polishing part is made of a polyurethane foam material, and the porosity of the polyurethane foam material is 15% -25%.

According to the technical scheme, the elastic component is connected with the inclined polishing surface, so that the grinding head can be tightly attached to the surface to be polished at the edge during polishing, and the problem of low edge polishing efficiency is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a corresponding cross-sectional view of FIG. 1;

FIG. 3 is a schematic overall structure diagram of another embodiment of the present invention;

FIG. 4 is a corresponding cross-sectional view of FIG. 3;

FIG. 5 is a schematic overall structure diagram of another embodiment of the present invention;

FIG. 6 is a corresponding cross-sectional view of FIG. 5;

fig. 7 is a bottom view of the structure of the present embodiment.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	A first elastic part	300	Connecting part
200	A first polishing part	310	Magic tape
				110	Second elastic part	400	Center hole
210	Second polishing part	500	Gap
				220	A third polishing part

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The integral molding in the utility model includes the case of making one piece from the same material, and also includes the case of integrally processing two different materials.

Referring to fig. 1 to 6, the present invention provides a grinding head for polishing an edge portion of a workpiece, including a grinding portion, the grinding portion including a first elastic portion 100 and a first polishing portion 200, the first elastic portion 100 having a circular cross-section; the first polishing part 200 is adhered to the lower side of the first elastic part 100, or is integrally formed with the first elastic part 100; the lower surface of the first polishing section 200 is downwardly convex to form an inclined polishing surface. The grinding head further comprises a connecting portion 300 to connect the grinding portion to a drive mechanism. The connecting portion 300 is connected to the first elastic portion 100, and the connecting portion 300 adopts a hook and loop fastener 310 to bond the grinding head to the driving mechanism.

The magic tape 310 is provided with a hook face part and a hair face part, wherein the hook face part is fixed on the driving mechanism, the hair face part is fixed on the first elastic part 100, and when the magic tape is used, the hair face of the hair face part is only needed to be pasted on the hook face of the hook face part, and then the grinding head can be fixed on the driving mechanism. When in replacement, only the grinding head needing to be replaced needs to be directly torn down. When the magic tape 310 is adopted to realize connection, in order to avoid the influence of the magic tape 310 on the overall elasticity and height of the grinding head, the thickness of the hook face part and the rough face part after being bonded is controlled to be between 0.8mm and 2.5mm, and preferably between 1mm and 1.5 mm. Wherein, the wool surface part is made by cloth surface-based electrostatic flocking.

The rough face part is used for bonding with the grinding part, in a specific embodiment, copolyamide or copolyester hot melt adhesive films are used for bonding, the hot melt adhesive films are arranged into a net shape, and the area density of the hot melt adhesive films is between 30 grams per square meter and 70 grams per square meter.

In other embodiments, the magic tape can be adhered to the grinding part by glue.

The connection part 300 may adopt a high-viscosity double-sided tape to bond the grinding head to the driving mechanism, in addition to the magic tape 310.

A convex part is formed at the lower part of the first elastic part 100, and the first polishing part 200 is matched with the convex part in shape.

The grinding head is provided with a central hole 400, the diameter of the central hole 400 is 5mm-40mm, and the outer diameter of the first elastic part 100 is 45mm-160 mm. The central bore 400 may be used to position the grater on the drive mechanism to ensure that the grater is accurately positioned when mounted on the drive mechanism.

First elastic component 100 can adopt sponge, EVA, polyurethane foam material, the compound PU material of EVA to make, for guaranteeing resilience performance, when first elastic component 100 adopts the sponge layer, the density of sponge layer is between 45-95kg/m³And the hardness of the first elastic part 100 is between Shore F and 70-95 degrees. Among them, a shore F durometer is generally used to measure the hardness of a flexible material such as sponge. When the first elastic portion 100 is an EVA layer, the hardness of the first elastic portion 100 is shore C, 18 ° to 40 °. Among them, a shore C durometer is generally used for measuring the hardness of rubber and the like.

In one embodiment, the first polishing part 200 is a fiber buff, the polishing surface is tapered or curved, and the ratio of the height of the polishing surface to the diameter of the first elastic part 100 is 0.15-0.5. When the ratio is within the range, the utilization rate of the buffing is high, and the pressure between the polishing surface and the workpiece to be polished is moderate during polishing, so that the polishing efficiency can be ensured, and the abrasion to the buffing can be reduced. The hardness of the first polishing section 200 is shore C, 40 ° -90 °, and the thickness of the first polishing section 200 is 0.5mm-4 mm.

In order to ensure the wetting of the polishing solution, the lower surface of the first polishing part 200 is provided with a gap 500 or a shallow groove, and the radial included angle between the gap 500 or the shallow groove and the first polishing part is not more than 80 degrees

The first polishing portion 200 is a tapered or arc-shaped polishing surface, and is suitable for polishing an arc surface of an edge of a workpiece, such as an edge arc surface of a glass of an electronic product such as a mobile phone. In an embodiment of the integration of two grinding heads, the grinding head further includes a second elastic portion 110 and a second polishing portion 210, the second elastic portion 110 is located above the first elastic portion 100, and the second polishing portion 210 is fixed on an outer circumferential surface of the second elastic portion 110 or integrally formed with the second elastic portion 110.

In order to prevent the first polishing section 200 from contacting a workpiece or equipment during the polishing work of the second polishing section 210, the outer diameter of the second polishing section 210 is greater than or equal to the outer diameter of the first polishing section 200.

The hardness of the second elastic portion 110 and the hardness of the second polishing portion 210 are both within shore C, 40 degrees to 60 degrees, and the hardness of the second polishing portion 210 is greater than the hardness of the second elastic portion 110.

Besides side polishing and edge cambered surface polishing, grooves are also formed in the sides of some workpieces, for example, groove-shaped sound holes reserved at the top end of the front glass of the mobile phone of the full-face screen. The groove is a shallow groove, the edge of the single groove and the junction of the glass plate have obvious turning angles, and in order to polish the groove, the utility model further provides an embodiment that a third polishing part 220 made of polyurethane foam material is added above the second polishing part 210, and the porosity of the polyurethane foam material is 15% -25%. The third polishing section 220 has an outer diameter not smaller than that of the second polishing section 210.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A grinding head for polishing an edge portion of a workpiece, comprising a grinding portion, characterized in that the grinding portion comprises:

a first elastic part having a circular cross-section;

the first polishing part is adhered to the lower part of the first elastic part or integrally formed with the first elastic part; the lower surface of the first polishing part protrudes downward to form an inclined polishing surface.

2. The abrasive tip of claim 1, wherein said abrasive tip further comprises an attachment portion to attach said abrasive portion to a drive mechanism.

3. The grinding head of claim 2, wherein the connecting portion connects the first resilient portion and the connecting portion bonds the grinding portion to the drive mechanism using a double-sided adhesive tape.

4. The grinding head of claim 2, wherein the connecting portion is connected to the first elastic portion, and the connecting portion bonds the grinding head to the driving mechanism using a hook and loop fastener.

5. The grinding head of claim 3 or 4, wherein the thickness of the connecting portion is between 0.8mm and 2.5 mm.

6. The grinding head of claim 4, wherein the magic tape is provided with a hook surface part and a hair surface part, and the hair surface part is made of cloth cover based electrostatic flocking.

7. The grinding head according to claim 6, wherein the roughened surface portion is bonded to the grinding portion by a hot melt adhesive film.

8. The grinding head of claim 7, wherein the hot melt adhesive film is a copolyamide adhesive film or a copolyester adhesive film.

9. The grinding head of claim 7 wherein the hot melt adhesive film has a surface density of from 30 to 70 grams per square meter.

10. The abrasive tip of claim 1, wherein said abrasive tip has a central bore.

11. The grinding head of claim 10, wherein the aperture of the central hole is between 5mm and 40mm, and the outer diameter of the first resilient part is between 45mm and 160 mm.

12. The grinding head of claim 1, wherein the first resilient portion is a sponge layer having a density of 45-95kg/m³And the hardness of the first elastic part is between Shore F and 70-95 degrees.

13. The grinding head of claim 12, wherein the first elastic portion is an EVA layer, and the hardness of the first elastic portion is shore C, 18 ° -40 °.

14. The grinding head according to claim 1, wherein the polishing surface has a tapered or curved shape, and a ratio of a height of the polishing surface to a diameter of the first resilient portion is in a range of 0.15 to 0.5.

15. The abrasive tip according to claim 14, wherein said first polishing portion has a hardness of shore C, 40 ° -90 °, and a thickness of said first polishing portion is 0.5mm-4 mm.

16. The grinding head according to claim 1, wherein the first polishing portion has slits or shallow grooves formed in a lower surface thereof, the slits or the shallow grooves having an angle of not more than 80 ° with respect to a radial direction of the first polishing portion.

17. The grinding head according to claim 1, further comprising a second elastic portion located above the first elastic portion, and a second polishing portion fixed to an outer peripheral surface of the second elastic portion or integrally formed with the second elastic portion.

18. The grinding head according to claim 17, wherein an outer diameter of the second polishing section is larger than or equal to an outer diameter of the first polishing section.

19. The grinding head according to claim 18, wherein the hardness of each of the second resilient portion and the second polishing portion is within the range of shore C, 40 ° -60 °, and the hardness of the second polishing portion is not less than the hardness of the second resilient portion.

20. The grinding head of claim 17, further comprising a third polishing portion, wherein the third polishing portion is made of a polyurethane foam material, and the porosity of the polyurethane foam material is 15% to 25%.