Mould for forming large-diameter resin end surface super-hard grinding disc

Abstract

The utility model belongs to the field of grinding materials and grinding tools, and particularly relates to a mold for forming a large-diameter resin end face superhard grinding disc, which comprises a fastening frame and a mold frame, the mold frame comprises an outer arc plate, a middle arc plate and an inner arc plate, the same side ends of the outer arc plate, the middle arc plate and the inner arc plate are all abutted against side end plates, and the mold frame is provided with an outer fan-shaped cavity and an inner fan-shaped cavity. A first upper forming pressing piece and a first lower forming pressing piece are arranged in the outer fan-shaped cavity, a second upper forming piece and a second lower forming piece are arranged in the inner fan-shaped cavity, and the outer arc face of the inner fan-shaped cavity is equal to the inner arc face of the outer fan-shaped cavity. The inner abrasive discs formed by pressing the inner fan-shaped cavities and the outer abrasive discs formed by pressing the outer fan-shaped cavities can be spliced to form fan-shaped abrasive disc units, and the fan-shaped abrasive disc units are arranged in the circumferential direction and spliced to form the whole abrasive disc.

Description

Technical Field

[0001] The utility model belongs to the field of abrasive materials and grinding tools, and in particular relates to a mold for forming a large-diameter resin end-face superhard grinding disc. Background Art

[0002] End face grinding is a highly efficient plane processing method that can achieve rapid stock removal and precision grinding of workpieces that require one-time grinding of the end face. It has high processing accuracy and can obtain the required surface roughness. It is suitable for rapid and continuous batch processing of large stock and high-precision double-end face parts.

[0003] The resin end grinding super-hard grinding disc consists of an abrasive layer and a substrate. The abrasive layer is composed of abrasives, resin binders, fillers, etc. The substrate is generally made of aluminum, steel or copper. The material layer of the resin end grinding disc is generally large in width and is usually prepared by direct hot pressing. The abrasive layer is directly pressed on the substrate through a mold, and the material layer and the substrate are connected by mechanical bite.

[0004] In the actual production process, it is found that when the outer diameter of the grinding disc is less than Ф500mm, 1-2 people can assist in forming the grinding disc. When the outer diameter of the grinding disc is between Ф500-Ф800mm, 2 people plus a crane are required to assist in forming. However, when the outer diameter of the grinding disc is greater than Ф800mm, the difficulty of direct hot pressing forming is greatly increased, mainly reflected in: 1. The diameter of the grinding wheel is too large, and the operation is difficult during the steps of mold assembly, applying release agent, and demolding; 2. Manual feeding is mostly used when feeding the abrasive layer, and the uniformity of the material layer is difficult to ensure; 3. The requirements for equipment such as hot presses and operating tables are increased, increasing losses; 4. The ring width of the abrasive layer is too large, and the uncontrollable factors in the forming process increase, which is easy to cause scrap and increase costs.

[0005] In response to the above problems, the applicant processes several fan-shaped grinding plate units during the forming process of large-diameter grinding discs, and then combines the fan-shaped grinding plate units to form a large-diameter grinding disc. However, for grinding discs with too large diameters, the forming of the fan-shaped grinding plate units may still fail due to problems such as exhaust. Therefore, the applicant further splits the fan-shaped grinding plate units into parts of the fan-shaped grinding plate units at a time, and then combines these parts into fan-shaped grinding plate units and then into grinding discs. However, this affects the processing efficiency of the fan-shaped grinding discs. In response to this problem, the applicant has developed a special forming mold. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a die for forming a large-diameter resin end-face superhard grinding disc, so as to improve the processing efficiency of the large-diameter grinding disc.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a large-diameter resin end face superhard grinding disc molding mold, including a fastening frame and a mold frame, the mold frame includes an outer arc plate, an intermediate arc plate and an inner arc plate, the intermediate arc plate is arranged between the outer arc plate and the inner arc plate, and the outer arc plate, the intermediate arc plate and the inner arc plate are arranged concentrically, the two ends of the intermediate arc plate are abutted against the two ends of the outer arc plate through the inner side plate, the outer arc surface of the intermediate arc plate, the inner arc surface of the outer arc plate and the inner end surfaces of the two inner side plates constitute an outer fan-shaped cavity, a first upper molding press and a first lower molding press are arranged in the outer fan-shaped cavity, the inner arc surface of the intermediate arc plate also forms a splicing arc surface with the lower end surfaces of the two inner side plates, and the splicing arc surface is equal to the outer arc surface of the intermediate arc plate;

[0008] An outer plate is arranged on the outer side of the two inner plates, the inner end surface of the outer plate is parallel to the inner end surface of the corresponding inner plate, the two end portions of the inner arc plate are respectively abutted against the inner end surfaces of the two outer plates, the outer arc surface of the inner arc plate, the spliced ​​arc surface and the inner end surfaces of the two outer plates constitute an inner fan-shaped cavity, the second upper forming pressing piece and the second lower forming pressing piece are arranged in the inner fan-shaped cavity, and the fastening frame is sleeved on the outside of the mold frame.

[0009] The first upper molding press and the first lower molding press cooperate with each other in the outer fan-shaped cavity to form an outer grinding plate, and the second upper molding press and the second lower molding press cooperate with each other in the inner fan-shaped cavity to form an inner grinding plate. The inner grinding plate and the outer grinding plate can be spliced ​​into a fan-shaped grinding plate unit. Processing the fan-shaped grinding plate unit in this way can effectively avoid the problem of waste caused by excessive material layer affecting exhaust during molding, thereby improving the success rate of molding.

[0010] As a preferred technical solution, the included angle between the two inner plates and the included angle between the two outer plates are both α, α=360° / n and n is a positive integer.

[0011] As a preferred technical solution, the outer arc surface of the outer arc plate and the upper end surfaces of the two outer plates and the upper end surfaces of the two inner plates form an upper mating arc surface, the inner arc surface of the inner arc plate and the lower end surfaces of the two outer plates form a lower mating arc surface, the fastening frame is sleeved on the outside of the mold frame and the inner end surfaces of the fastening frame are respectively in contact with the upper mating arc surface, the lower mating arc surface and the outer end surfaces of the two outer plates.

[0012] As a preferred technical solution, the upper matching arc surface, the lower matching arc surface and the outer end surface of the outer plate are all outer bevels, and the inner end surfaces of the fastening frame are all inner bevels. The outer surfaces of the mold frame and the inner surfaces of the fastening frame are all set as bevels, which is conducive to the matching of the fastening frame and the module.

[0013] As a preferred technical solution, the outer side plate and the inner side plate on the corresponding side are side end plates of an integrated structure.

[0014] As a preferred technical solution, the first upper molding press and the first lower molding press are both fan-shaped, and the area defined by the lower end surface of the first upper molding press and the upper end surface of the first lower molding press in the outer fan-shaped cavity is the outer molding cavity;

[0015] The second upper molding press piece and the second lower molding press piece are both fan-shaped, and the area defined between the lower end surface of the second upper molding press piece and the upper end surface of the second lower molding press piece in the inner fan-shaped cavity is the inner molding cavity.

[0016] As a preferred technical solution, a disassembly piece is provided on the first upper molding press piece and / or the second upper molding press piece.

[0017] Compared with the prior art, the utility model has the following beneficial effects: 1. By using the mold of the utility model, inner and outer grinding plates can be formed at a single time, and the inner and outer grinding plates can be combined to form a fan-shaped grinding plate unit. A specified number of fan-shaped grinding plate units can be circumferentially spliced ​​to form a grinding disc as a whole. This processing method greatly reduces the difficulty of forming a large-diameter grinding disc. A single person can complete the forming of the fan-shaped grinding plate unit, reducing the single feed amount and uncontrollable factors, reducing the occurrence of uneven material layers, improving product quality, and reducing the scrap rate; 2. The mold of the utility model adopts a double-cavity structure design, which can to a certain extent avoid the problem of scrap caused by the large material layer and difficulty in exhausting during pressing, and the mold frame adopts a combined design, which is reinforced by a fastening frame on the outside, and the inner end faces on each side of the fastening frame and the outer end faces on each side of the mold frame are set as inclined surfaces. The fastening frame is fixed and closed, and it is more convenient to unload the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 Schematic diagram of the structure of the mold;

[0020] Figure 2 It is a schematic diagram of the cooperation between the fastening frame and the mold frame;

[0021] Figure 3 It is a schematic diagram of the structure of the mold frame, the first lower molding press piece, and the second lower molding press piece;

[0022] Figure 4 It is a structural schematic diagram of the mold frame;

[0023] Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle;

[0024] In the figure: 1, outer arc plate, 2, middle arc plate, 3, inner arc plate, 4, side end plate, 5, outer fan-shaped cavity, 6, inner fan-shaped cavity, 7, first upper molding press, 8, first lower molding press, 9, second upper molding press, 10, second lower molding press, 11, fastening frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0026] like Figure 1-Figure 5 As shown, a mold for forming a large-diameter resin end face superhard grinding disc includes a fastening frame 11 and a mold frame, the mold frame includes an outer arc plate 1, an intermediate arc plate 2 and an inner arc plate 3, the outer arc plate 1 is arranged on one side of the outer arc surface of the intermediate arc plate 2, the inner arc plate 3 is arranged on one side of the inner arc surface of the intermediate arc plate 2, and the outer arc plate 1, the intermediate arc plate 2 and the inner arc plate 3 are concentrically arranged. Both ends of the middle arc plate 2 are provided with inner plates, and the two ends of the middle arc plate 2 are respectively abutted against the two inner plates, and the two inner plates are respectively abutted against the two ends of the outer arc plate 1, and the outer arc surface of the middle arc plate 2, the inner arc surface of the outer arc plate 1 and the inner end surfaces of the two inner plates form a chamber with a fan-shaped cross-section, which is an outer fan-shaped chamber 5, and a first upper molding press 7 and a first lower molding press 8 are arranged in the outer fan-shaped chamber 5, and the first upper molding press 7 and the first lower molding press 8 are both fan-shaped plate structures, and the area defined by the lower end surface of the first upper molding press 7 and the upper end surface of the first lower molding press 8 in the outer fan-shaped chamber 5 is the outer molding chamber, and the first upper molding press 7 and the first lower molding press 8 can cooperate to press the mixed powder in the outer molding chamber into a fan-shaped outer grinding disc.

[0027] The lower end surface of the inner plate is a curved surface, and the lower end surfaces of the two inner plates and the inner curved surface of the middle curved plate 2 form a spliced ​​curved surface, which is a curved surface and has the same parameters as the outer curved surface of the middle curved plate 2.

[0028] An outer plate is provided on the outer side of the two inner plates, the inner end surface of the outer plate is parallel to the inner end surface of the corresponding inner plate, the inner end surface angle of the two outer plates is the same as the inner end surface angle of the two inner plates, the inner arc plate 3 is between the two outer plates and the two ends of the inner arc plate 3 are respectively in contact with the inner end surfaces of the two outer plates, the outer arc surface of the inner arc plate 3, the spliced ​​arc surface and the inner end surfaces of the two outer plates form a chamber with a fan-shaped cross section, which is the inner fan-shaped chamber 6. A second upper molding press 9 and a second lower molding press 10 are provided in the inner fan-shaped chamber 6, the second upper molding press 9 and the second lower molding press 10 are both fan-shaped, and the area defined by the lower end surface of the second upper molding press 9 and the upper end surface of the second lower molding press 10 in the inner fan-shaped chamber 6 is the inner molding chamber, and the second upper molding press 9 and the second lower molding press 10 cooperate to press the mixed powder in the inner molding chamber into a fan-shaped inner grinding disc.

[0029] Since the outer arc surface of the inner fan-shaped cavity 6 is a spliced ​​arc surface, the inner arc surface of the outer fan-shaped cavity 5 is the outer arc surface of the middle arc plate 2, and the parameters of the spliced ​​arc surface and the outer arc surface of the middle arc plate 2 are the same, the outer arc surface of the inner grinding plate can correspond to and fit with the inner arc surface of the outer grinding plate, and the inner grinding plate and the outer grinding plate can be combined to form a fan-shaped fan-shaped grinding plate unit.

[0030] In order to facilitate the splicing and combination of the fan-shaped grinding units to form a large-diameter grinding disc, the angle between the two inner plates and the angle between the two outer plates are both α, α=360° / n and n is a positive integer, n is preferably 12, when n is 12, α is 30°, at this time, 12 fan-shaped grinding units need to be processed, and the 12 fan-shaped grinding discs can be combined to form a large-diameter grinding disc. Of course, according to the diameter of the grinding disc, n can also be set to 3, 4, 6, 9 and other numbers. When n is 3, the center angle of the manufactured fan-shaped grinding unit corresponds to 120°, and when n is 4, the center angle of the manufactured fan-shaped grinding unit is 90°.

[0031] The outer arc surface of the outer arc plate 1 and the upper end surfaces of the two outer plates and the upper end surfaces of the two inner plates form an upper matching arc surface, and the inner arc surface of the inner arc plate 3 and the lower end surfaces of the two outer plates form a lower matching arc surface. After the outer arc plate 1, the middle arc plate 2, the inner arc plate 3, the inner plate and the outer plate are spliced ​​to form a mold frame, the fastening frame 11 is sleeved on the outside of the mold frame and the mold frame is fastened. The fastening frame 11 is provided with a fastening hole, and the shape of the fastening hole is the same as the external shape of the mold frame. When the fastening frame 11 is sleeved on the outside of the mold frame, the inner end surfaces of the fastening holes are respectively in contact with the upper matching arc surface, the lower matching arc surface and the outer end surfaces of the two outer plates. Under the contraction of the fastening frame 11, the mold frame will not fall apart during the process of the second upper molding press 9 and the second lower molding press 10 cooperating to press the inner grinding sheet and / or the first upper molding press 7 and the first lower molding press 8 cooperating to press the outer grinding sheet.

[0032] In order to achieve a better fastening effect for the fastening frame 11 and facilitate removal of the fastening frame 11 from the mold frame, the upper mating arc surface, the lower mating arc surface and the outer end surfaces of the outer plate are all tapered outer bevels, and the inner end surfaces of the fastening frame 11 are all tapered inner bevels.

[0033] As a preferred embodiment, the outer side plate and the inner side plate of the corresponding side are side end plates 4 of an integrated structure, the inner end surface of the side end surface is a stepped surface, the inner end surface of the outer side plate and the inner end surface of the inner side plate are respectively two end surfaces of the stepped surface, the inner arc surface of the middle arc plate 2 is flush with the step of the side end plate 4 and is combined with the stepped surfaces of the end plates 4 on both sides to form a spliced ​​end surface.

[0034] In some embodiments, in order to facilitate demoulding after molding, the first upper molding press 7 and / or the second upper molding press 9 are provided with disassembly parts, and the disassembly parts are disassembly handles or disassembly protrusions installed by bolts.

[0035] Please refer again Figure 1-Figure 5 When the tooling of the utility model is used to make a large-diameter resin end surface superhard grinding disc, the inner end surface of the opposite end surface, the inner arc surface of the upper arc plate, the outer arc surface of the lower arc plate, the inner arc surface and the outer arc surface of the middle arc plate 2, the lower end surface of the second upper molding press 9, the upper end surface of the second lower molding press 10, the lower end surface of the first upper molding press 7 and the upper end surface of the first upper molding press 7 are cleaned and coated with a release agent, and the mold frame is assembled and molded, and the second lower molding press 10 and the first lower molding press 8 are respectively arranged in the inner fan-shaped cavity 6 and the outer fan-shaped cavity 5, and then the fastening frame 11 is sleeved on the outside of the mold frame, and then the mixed powder is added to the inner fan-shaped cavity 6 and the outer fan-shaped cavity 5, and the top of the material layer is scraped and smoothed. Place the second upper molding press 9 in the inner fan-shaped cavity 6, place the first upper molding press 7 in the outer fan-shaped cavity 5, and then place the entire mold on a hot press to perform molding according to the molding process; after molding is completed, remove the mold from the hot press, invert the mold, tap to remove the fastening frame 11, and then disassemble the mold frame to obtain an inner grinding plate formed by the second upper molding press 9 and the second lower molding press 10, and an outer grinding plate formed by the first upper molding press 7 and the first lower molding press 8, and splice the inner grinding plate and the outer grinding plate to form a fan-shaped grinding plate unit, repeat the above work to make multiple fan-shaped grinding plate units, and then select a suitable number of fan-shaped grinding plate units to splice into a large-diameter resin end face superhard grinding disc.

[0036] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large diameter resin end surface superhard grinding disc molding die, characterized in that: The invention comprises a fastening frame (11) and a mold frame, wherein the mold frame comprises an outer arc plate (1), an intermediate arc plate (2) and an inner arc plate (3), wherein the intermediate arc plate (2) is arranged between the outer arc plate (1) and the inner arc plate (3), and the outer arc plate (1), the intermediate arc plate (2) and the inner arc plate (3) are arranged concentrically, and the two ends of the intermediate arc plate (2) are abutted against the two ends of the outer arc plate (1) through the inner side plates, and the outer arc surface of the intermediate arc plate (2), the inner arc surface of the outer arc plate (1) and the inner end surfaces of the two inner side plates form an outer fan-shaped cavity (5), and a first upper molding press (7) and a first lower molding press (8) are arranged in the outer fan-shaped cavity (5), and the inner arc surface of the intermediate arc plate (2) also forms a splicing arc surface with the lower end surfaces of the two inner side plates, and the splicing arc surface is equal to the outer arc surface of the intermediate arc plate (2); An outer plate is arranged outside the two inner plates, the inner end surface of the outer plate is parallel to the inner end surface of the corresponding inner plate, the two ends of the inner arc plate (3) are respectively abutted against the inner end surfaces of the two outer plates, the outer arc surface of the inner arc plate (3), the spliced ​​arc surface and the inner end surfaces of the two outer plates form an inner fan-shaped cavity (6), a second upper molding press (9) and a second lower molding press (10) are arranged in the inner fan-shaped cavity (6), and the fastening frame (11) is sleeved on the outside of the mold frame.

2. A large diameter resin end surface superhard grinding disc forming mold according to claim 1, characterized in that: The included angle of the two inner plates and the included angle of the two outer plates are both α, α=360° / n and n is a positive integer.

3. A large diameter resin end surface superhard grinding disc forming mold according to claim 2, characterized in that: The outer arc surface of the outer arc plate (1) and the upper end surfaces of the two outer plates and the upper end surfaces of the two inner plates form an upper matching arc surface, the inner arc surface of the inner arc plate (3) and the lower end surfaces of the two outer plates form a lower matching arc surface, the fastening frame (11) is sleeved on the outside of the mold frame, and the inner end surfaces of the fastening frame (11) are respectively in contact with the upper matching arc surface, the lower matching arc surface and the outer end surfaces of the two outer plates.

4. A large diameter resin end surface superhard grinding disc forming mold according to claim 3, characterized in that: The upper matching arc surface, the lower matching arc surface and the outer end surface of the outer plate are all outer bevel surfaces, and the inner end surfaces of the fastening frame (11) are all inner bevel surfaces.

5. The large-diameter resin end-surface superhard grinding disc forming mold according to claim 4, characterized in that: The outer side plate and the inner side plate on the corresponding side are a side end plate (4) of an integral structure.

6. The mold for forming a large-diameter resin end-face superhard grinding disc according to claim 4, characterized in that: The first upper molding press (7) and the first lower molding press (8) are both fan-shaped, and the area defined between the lower end surface of the first upper molding press (7) and the upper end surface of the first lower molding press (8) in the outer fan-shaped cavity (5) is the outer molding cavity; The second upper molding press (9) and the second lower molding press (10) are both fan-shaped, and the area defined between the lower end surface of the second upper molding press and the upper end surface of the second lower molding press in the inner fan-shaped cavity (6) is the inner molding cavity.

7. The mold for forming a large-diameter resin end-face superhard grinding disc according to claim 6, characterized in that: The first upper molding press piece and / or the second upper molding press piece (9) are both provided with a disassembly piece.

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