A carbon fiber matrix composite structure grinding wheel and its manufacturing method

Abstract

The present invention discloses a carbon fiber matrix composite structure grinding wheel and a manufacturing method thereof. The carbon fiber matrix composite structure grinding wheel comprises a carbon fiber matrix, a grinding wheel piece and a monofilament pre-tightening cloth. The grinding wheel piece is sleeved on the carbon fiber matrix, and the two are bonded by gluing. The monofilament pre-tightening cloth is wound on the carbon fiber matrix. The carbon fiber matrix composite structure grinding wheel of the present invention solves the problems of large mass, low specific strength and modulus, large inertia and poor vibration resistance of existing metal grinding wheels; the present invention also discloses a manufacturing method of a carbon fiber matrix composite structure grinding wheel, by which a carbon fiber matrix composite structure grinding wheel can be manufactured.

Description

Technical Field

[0001] The invention relates to the technical field of abrasive materials and grinding tools, in particular to a carbon fiber matrix composite structure grinding wheel and a manufacturing method thereof. Background Art

[0002] Grinding wheel is also called bonded abrasive. It is a bonded abrasive with a certain strength that is formed by bonding ordinary abrasive into a certain shape (mostly round with a through hole in the center). It is generally composed of abrasive, bonding agent and pores, which are often called the three elements of bonded abrasive. Grinding wheel is the most widely used abrasive. It rotates at high speed when used, and can be used for rough grinding, semi-finishing grinding and fine grinding of the outer circle, inner circle, plane and various profiles of metal or non-metal workpieces, as well as slotting and cutting.

[0003] The metal-based grinding wheel has a large mass and low specific strength and modulus, which leads to large radial deformation of the grinding wheel, large spindle load, high power consumption, and poor vibration resistance during ultra-high-speed grinding, affecting the grinding accuracy and surface quality. Carbon fiber has high specific strength and modulus, high fatigue strength, high damping, light weight, low thermal expansion coefficient, and can be designed and easily formed, which provides the possibility of manufacturing a grinding wheel matrix suitable for ultra-high-speed grinding. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems and / or problems existing in existing grinding wheels, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to solve the problems of large mass, low specific strength and modulus, large inertia and poor vibration resistance of the existing grinding wheel.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a carbon fiber matrix composite structure grinding wheel, comprising a carbon fiber matrix, which is wound and formed by an internal core mold; and a grinding wheel piece, which is glued to the outer ring of the carbon fiber matrix.

[0008] As a preferred solution of the carbon fiber matrix composite structure grinding wheel of the present invention, the carbon fiber matrix includes an inner ring, a carbon fiber middle ring and a carbon fiber outer ring.

[0009] As a preferred solution of the carbon fiber matrix composite structure grinding wheel described in the present invention, it also includes a monofilament pre-tensioning cloth, which is wound on the carbon fiber matrix, including a first ring annularly wound on the carbon fiber outer ring, a second ring annularly wound on the first ring, and a third ring radially wound on the carbon fiber matrix, the first ring and the second ring.

[0010] As a preferred solution of the carbon fiber matrix composite structure grinding wheel of the present invention, the width of the second ring is greater than the width of the first ring.

[0011] As a preferred solution of the carbon fiber matrix composite structure grinding wheel of the present invention, the material of the inner ring is metal or carbon fiber.

[0012] Another object of the present invention is to provide a method for manufacturing a carbon fiber matrix composite structure grinding wheel, by which the problem of how to manufacture a carbon fiber matrix composite structure grinding wheel can be solved.

[0013] To solve the above technical problems, the present invention provides the following technical solutions: a method for manufacturing a carbon fiber matrix composite structure grinding wheel, which comprises the following steps: respectively winding a carbon fiber middle ring and a carbon fiber outer ring by an internal core mold; interference fitting the inner ring, the carbon fiber middle ring and the carbon fiber outer ring into a carbon fiber matrix; winding the carbon fiber matrix with a monofilament pre-tightening cloth; curing and shaping the wound carbon fiber matrix; gluing the grinding wheel disc to the shaped carbon fiber matrix, and pressurizing and shaping it with a mold.

[0014] As a preferred embodiment of the manufacturing method of a carbon fiber matrix composite structure grinding wheel described in the present invention, after the carbon fiber matrix is ​​wrapped with the monofilament pre-tightening cloth and cured and shaped, a carbon fiber woven cloth is pasted according to the shape of the carbon fiber matrix, and then covered with a light-transmitting film, and each surface of the carbon fiber matrix is ​​pressed and cured with a mold.

[0015] As a preferred embodiment of the manufacturing method of a carbon fiber matrix composite structure grinding wheel described in the present invention, when the inner ring, the carbon fiber middle ring and the carbon fiber outer ring are interference fitted, the carbon fiber middle ring and the carbon fiber outer ring are interference fitted first, and then interference fitted with the inner ring.

[0016] As a preferred embodiment of the manufacturing method of a carbon fiber matrix composite structure grinding wheel described in the present invention, when performing interference fitting, the carbon fiber outer ring is heated to expand, and the carbon fiber middle ring is cooled and shrunk, and glue is applied to the carbon fiber outer ring and the carbon fiber middle ring before assembling to form an intermediate composite component, the intermediate composite component is heated to expand, and the inner ring is cooled and shrunk, and glue is applied to the intermediate composite component and the inner ring before assembling.

[0017] As a preferred embodiment of the method for manufacturing a carbon fiber matrix composite structure grinding wheel described in the present invention, a pre-bonding gap is reserved when the carbon fiber middle ring and the carbon fiber outer ring, the inner ring and the intermediate composite part are bonded.

[0018] As a preferred embodiment of the manufacturing method of a carbon fiber matrix composite structure grinding wheel described in the present invention, when the carbon fiber matrix is ​​wound with a monofilament pre-tightening cloth, it is firstly wound circumferentially on the outer ring of the carbon fiber to form a first ring, then circumferentially wound on the first ring to form a second ring, and finally radially wound around the center hole to wrap the carbon fiber matrix, the first ring and the second ring.

[0019] The beneficial effect of the present invention is to disclose a carbon fiber matrix composite structure grinding wheel, which includes an inner ring, a carbon fiber structure and a grinding wheel piece, which solves the problems of heavy metal grinding wheels having large mass, low specific strength and modulus, large inertia and poor vibration resistance; the present invention also discloses a method for manufacturing a carbon fiber matrix composite structure grinding wheel, by which a carbon fiber matrix composite structure grinding wheel can be manufactured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 This is a structural diagram of the carbon fiber matrix composite structure grinding wheel in Example 1.

[0022] Figure 2a-2b This is a diagram of the steps of winding the monofilament pre-tightening cloth of the carbon fiber matrix composite structure grinding wheel in Example 1.

[0023] Figure 3 This is a step diagram of the method for manufacturing a carbon fiber matrix composite structure grinding wheel in Example 2.

[0024] Figure 4 This is a complete step diagram of the manufacturing method of the carbon fiber matrix composite structure grinding wheel in Example 2. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1

[0029] Reference Figure 1 and Figure 2a-2b , which is the first embodiment of the present invention, provides a carbon fiber matrix composite structure grinding wheel, which includes a carbon fiber matrix 100 and a grinding wheel 200. The grinding wheel 200 is sleeved on the outer ring of the carbon fiber matrix 100, and the two are glued.

[0030] Specifically, Figure 1 The carbon fiber matrix 100 includes an inner ring 101, a carbon fiber middle ring 102 and a carbon fiber outer ring 103; the carbon fiber matrix 100 is composed of an inner ring 101, a carbon fiber middle ring 102 and a carbon fiber outer ring 103 from the inside to the outside. The material of the inner ring 101 is metal or carbon fiber. When the inner ring 101 is made of carbon fiber material, the grinding wheel is lighter. When the inner ring 101 is made of metal material, the grinding wheel can be more firmly fixed on the grinding machine.

[0031] The grinding wheel 200 is glued to the carbon fiber outer ring 103 by using AB glue.

[0032] Carbon fiber has the characteristics of high specific strength and specific modulus, high fatigue strength, high damping, light weight, low thermal expansion coefficient, and can be designed and easily formed. The carbon fiber middle ring 102 and the carbon fiber outer ring 103 are made of carbon fiber material, which reduces the weight of the grinding wheel while ensuring its strength and vibration resistance.

[0033] Furthermore, the carbon fiber inner ring 101, the carbon fiber middle ring 102 and the carbon fiber outer ring 103 are all wound and formed by an internal core mold, and the winding angles are not limited.

[0034] Further, such as Figure 2a-2b, also includes a monofilament pre-tightening cloth 300, which is wound on the carbon fiber matrix 100, including a first ring 301 circumferentially wound on the carbon fiber outer ring 103, a second ring 302 circumferentially wound on the first ring 301, and a third ring 303 radially wound on the carbon fiber matrix 100, the first ring 301 and the second ring 302. The first ring 301 is a support ring in the matrix, which mainly plays the role of fixing the carbon fiber matrix 100 and supporting the second ring 302. The second ring 302 is a grinding force heavy-load support ring, which mainly plays the role of supporting the grinding wheel 200 during grinding. The third ring 303 is a fastening ring, which mainly plays the role of further fastening the entire carbon fiber matrix 100, the first ring 301 and the second ring 302.

[0035] Furthermore, the width of the second ring 302 is greater than the width of the first ring 301. Generally speaking, the width of the carbon fiber matrix 100 is smaller than the width of the grinding wheel 200. The width of the first ring 301 is generally the same as the width of the carbon fiber outer ring 103. The second ring 302 is wider in order to better contact the inner side of the grinding wheel 200, making its connection more firmly and helping to improve the safety performance of the grinding wheel. The width of the second ring 302 is preferably the same as the width of the grinding wheel 200, that is, the contact area with the grinding wheel 200 can be maximized, which is also more beautiful.

[0036] In summary, the carbon fiber matrix composite structure grinding wheel is composed of a carbon fiber matrix 100 , a grinding wheel piece 200 and a monofilament pre-tightening cloth 300 . The monofilament pre-tightening cloth 300 is wound on the carbon fiber matrix 100 , and the grinding wheel piece 200 is glued to the third ring 303 .

[0037] Example 2

[0038] Reference Figure 3 and Figure 4 , which is the second embodiment of the present invention, provides a method for manufacturing a carbon fiber matrix composite structure grinding wheel, and a carbon fiber matrix composite structure grinding wheel can be manufactured according to this method.

[0039] Specifically, the method for manufacturing a carbon fiber matrix composite structure grinding wheel comprises the following steps: Figure 3

[0040] The carbon fiber middle ring 102 and the carbon fiber outer ring 103 are respectively wound and formed by adopting an internal core mold method. If the inner ring 101 is made of carbon fiber material, the inner ring 101 is also wound and formed by adopting an internal core mold method.

[0041] The internal core mold is taken out, and various sizes of the carbon fiber matrix (100) are processed by mechanical processing, including width, inner and outer diameters, etc.;

[0042] The inner ring 101, the carbon fiber middle ring 102 and the carbon fiber outer ring 103 are interference fitted into a carbon fiber matrix 100;

[0043] Winding the carbon fiber matrix 100 with a monofilament pre-tightening cloth 300;

[0044] The wound carbon fiber matrix 100 is cured and shaped, and the curing method can be an autoclave method or a molding method;

[0045] Use mechanical processing to process various dimensions according to the grinding wheel drawing, usually including positioning holes, clamping holes, mounting surfaces, etc. After processing, clean the processed surface to ensure that there is no dust, etc.;

[0046] The grinding wheel 200 is glued to the shaped carbon fiber matrix 100 and pressurized with a mold. The gluing process specifically uses a mechanical grinding method to grind the outer cylindrical surface of the wound carbon fiber matrix 100 so that its surface roughness reaches Ra12.6 or above, presenting a hairy surface visible to the naked eye. Then, the grinding wheel 200 is glued to the polished outer cylindrical surface with glue, and the outside is pressurized with a mold so that it is shaped during the curing process.

[0047] Further, such as Figure 4 After the carbon fiber matrix 100 is wrapped with the monofilament pre-tightening cloth 300 and cured and shaped, the carbon fiber woven cloth is pasted according to the shape of the carbon fiber matrix 100, and then covered with a light-transmitting film. The various surfaces of the carbon fiber matrix 100 are pressed and cured with a mold to ensure that the surface texture is beautiful and translucent.

[0048] Further, when the inner ring 101, the carbon fiber middle ring 102 and the carbon fiber outer ring 103 are interference fitted, the carbon fiber middle ring 102 and the carbon fiber outer ring 103 are first interference fitted, and then the inner ring 101 is interference fitted, and the specific assembly steps are: the carbon fiber outer ring 103 is heated to expand, the carbon fiber middle ring 102 is cooled and shrunk, glue is applied to the carbon fiber outer ring 103 and the carbon fiber middle ring 102, and then the intermediate composite is assembled, the intermediate composite is heated to expand, the inner ring 101 is cooled and shrunk, and glue is applied to the intermediate composite and the inner ring 101, and then the intermediate composite is assembled. The preferred step of the present invention is to first assemble the carbon fiber middle ring 102 and the carbon fiber outer ring 103, and then assemble the inner ring 101, but it should be noted that the inner ring 101 can also be assembled with the carbon fiber middle ring 102 first, and then assembled with the carbon fiber outer ring 103. For thermal expansion, the accessories can be heated to 80-150℃ in an oven. For cooling and shrinking, the accessories can be placed in a freezer or cooled in liquid nitrogen. It should be noted that the time for shrinkage and expansion should be based on the time when the size of the accessories no longer changes.

[0049] Furthermore, when the carbon fiber middle ring 102 and the carbon fiber outer ring 103, the inner ring 101 and the intermediate composite part are bonded, a pre-bonding gap of 0.1mm-0.3mm is left. Leaving an appropriate pre-bonding gap can better ensure the firmness of the assembly and the integrity of the accessories, and when bonding, tooling is required for pre-tightening and shaping, usually using room temperature curing, and in special cases, temperature curing can be used, the curing temperature does not exceed 100°C, and the time is generally 4-12 hours.

[0050] Furthermore, when the monofilament pre-tightening cloth 300 is used to wrap the carbon fiber matrix 100, it is firstly wound in a circumferential direction on the carbon fiber outer ring 103 to form a first ring 301, then wound in a circumferential direction on the first ring 301 to form a second ring 302, and finally wound radially around the center hole to wrap the carbon fiber matrix 100, the first ring 301 and the second ring 302.

[0051] By means of the above method, a carbon fiber matrix composite structure grinding wheel is manufactured, which has the advantages of light weight, high specific strength and modulus, small inertia and strong vibration resistance.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A carbon fiber matrix composite structure grinding wheel, characterized in that: include, A carbon fiber matrix (100) is formed by winding in an internal core mold; and A grinding wheel (200) is adhesively bonded to the outer ring of the carbon fiber matrix (100); The carbon fiber matrix (100) comprises an inner ring (101), a carbon fiber middle ring (102) and a carbon fiber outer ring (103); It also includes a monofilament pre-tightening cloth (300) which is wound on the carbon fiber matrix (100), including a first ring (301) wound around the carbon fiber outer ring (103), a second ring (302) wound around the first ring (301), and a third ring (303) wound radially around the carbon fiber matrix (100), the first ring (301) and the second ring (302); The manufacturing method of the carbon fiber matrix composite structure grinding wheel comprises: The carbon fiber middle ring (102) and the carbon fiber outer ring (103) are respectively wound and formed by adopting an internal core mold method; The inner ring (101), the carbon fiber middle ring (102) and the carbon fiber outer ring (103) are interference-fitted to form a carbon fiber matrix (100); Winding the carbon fiber matrix (100) with a monofilament pre-tightening cloth (300); Curing and shaping the wound carbon fiber matrix (100); The grinding wheel (200) is glued to the shaped carbon fiber matrix (100), and is pressed and shaped using a mold; After the carbon fiber matrix (100) is wound with the monofilament pre-tightening cloth (300) and cured and shaped, a carbon fiber woven cloth is pasted according to the shape of the carbon fiber matrix (100), and then covered with a light-transmitting film. The various surfaces of the carbon fiber matrix (100) are pressed and cured using a mold.

2. The carbon fiber matrix composite structure grinding wheel according to claim 1, characterized in that: The width of the second ring (302) is greater than the width of the first ring (301).

3. The carbon fiber matrix composite structure grinding wheel according to claim 2, characterized in that: The material of the inner ring (101) is metal or carbon fiber.

4. A method for manufacturing a carbon fiber matrix composite structure grinding wheel according to any one of claims 1 to 3, characterized in that: The steps include: The carbon fiber middle ring (102) and the carbon fiber outer ring (103) are respectively wound and formed by adopting an internal core mold method; The inner ring (101), the carbon fiber middle ring (102) and the carbon fiber outer ring (103) are interference-fitted to form a carbon fiber matrix (100); Winding the carbon fiber matrix (100) with a monofilament pre-tightening cloth (300); Curing and shaping the wound carbon fiber matrix (100); The grinding wheel (200) is glued onto the shaped carbon fiber matrix (100), and is pressed and shaped using a mold.

5. The method for manufacturing a carbon fiber matrix composite structure grinding wheel according to claim 4, characterized in that: After the carbon fiber matrix (100) is wound with the monofilament pre-tightening cloth (300) and cured and shaped, a carbon fiber woven cloth is pasted according to the shape of the carbon fiber matrix (100), and then covered with a light-transmitting film. The various surfaces of the carbon fiber matrix (100) are pressed and cured using a mold.

6. The method for manufacturing a carbon fiber matrix composite structure grinding wheel according to claim 5, characterized in that: When the inner ring (101), the carbon fiber middle ring (102) and the carbon fiber outer ring (103) are interference fitted, the carbon fiber middle ring (102) and the carbon fiber outer ring (103) are first interference fitted and then interference fitted with the inner ring (101).

7. The method for manufacturing a carbon fiber matrix composite structure grinding wheel according to claim 6, characterized in that: When performing interference fit, the carbon fiber outer ring (103) is heated to expand, and the carbon fiber middle ring (102) is cooled and shrunk. After applying glue on the carbon fiber outer ring (103) and the carbon fiber middle ring (102), they are assembled to form an intermediate composite component. The intermediate composite component is heated to expand, and the inner ring (101) is cooled and shrunk. After applying glue on the intermediate composite component and the inner ring (101), they are assembled.

8. The method for manufacturing a carbon fiber matrix composite structure grinding wheel according to claim 7, characterized in that: When the carbon fiber middle ring (102) and the carbon fiber outer ring (103), the inner ring (101) and the intermediate composite component are glued together, a pre-bonding gap is left.

9. The method for manufacturing a carbon fiber matrix composite structure grinding wheel according to any one of claims 6 to 8, characterized in that: When the carbon fiber matrix (100) is wound with the monofilament pre-tightening cloth (300), it is first wound in a circumferential direction on the carbon fiber outer ring (103) to form a first ring (301), then wound in a circumferential direction on the first ring (301) to form a second ring (302), and finally wound radially around the center hole to wrap the carbon fiber matrix (100), the first ring (301) and the second ring (302).

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