Forming die for metal bond grinding wheel grinding block

Abstract

The utility model relates to a grinding wheel grinding block forming tool, in particular to a forming die for a metal bond grinding wheel grinding block, a die cavity is arranged in a forming die frame, an area limited by the lower end face of an upper pressing head and the upper end face of a lower pressing head in the die cavity is a forming cavity, and the forming cavity comprises a diamond layer forming cavity and a non-diamond layer forming cavity. An occupying blocking piece is arranged in the non-diamond layer forming cavity and is detachably arranged; when the diamond layer is pressed, the occupying blocking piece is arranged in the non-diamond layer forming cavity, after the diamond layer is pressed, the occupying blocking piece is removed from the non-diamond layer forming cavity, and then after material supplementing, an upper pressing head and a lower pressing head are matched to conduct cold press forming on the whole metal bond grinding wheel grinding block. The forming module is of a combined structure, and demolding of the metal bond grinding wheel grinding block after cold press forming is facilitated.

Description

Technical Field

[0001] The utility model relates to a forming tool for grinding wheel blocks, in particular to a forming die for metal-bonded grinding wheel blocks. Background Art

[0002] Compression molding is a necessary operation for metal grinding tools and the second basic process in the production of metal-bonded diamond grinding wheels. The quality of the formed material not only has a great impact on the subsequent sintering process but also directly affects the quality of the product. Compression molding means that metal powder or a mixture is loaded into a mold with a certain shape made of steel or graphite material, and pressure is applied to the powder material under the action of a press, and then the mold is removed to obtain a pressed product with a certain shape, size, density, and strength. In addition to the composition of the formed powder, the design of the mold structure has an important impact on the molding efficiency and even the pressing quality.

[0003] When the metal-bonded grinding wheel block is compression molded, it is necessary to first press the diamond layer, and then synchronously press the non-diamond layer and the diamond layer. Since at least two pressing processes are required, the existing tooling needs to be adjusted specifically for each pressing process, which affects the processing efficiency of the metal-bonded grinding wheel block. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a forming die for metal-bonded grinding wheel blocks, which facilitates the compression molding process of metal-bonded grinding wheel blocks and improves the processing efficiency of metal-bonded grinding wheel blocks.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a forming die for metal-bonded grinding wheel blocks, including a forming die frame, an upper punch, and a lower punch. A mold cavity is arranged inside the forming die frame, and the upper punch and the lower punch are arranged inside the mold cavity. The area defined by the lower end face of the upper punch and the upper end face of the lower punch inside the mold cavity is the forming cavity. The forming cavity includes a diamond layer forming cavity and a non-diamond layer forming cavity. A placeholder is arranged inside the non-diamond layer forming cavity, and the placeholder is detachably arranged. When the upper punch and the lower punch are inside the mold cavity, the placeholder is arranged in the non-diamond layer forming cavity when pressing the diamond layer. After the diamond layer is pressed, the placeholder is removed from the non-diamond layer forming cavity, and then after replenishing the material, the metal-bonded grinding wheel block is integrally cold-pressed by the cooperation of the upper punch and the lower punch.

[0006] As an alternative, the forming die frame includes a tapered sleeve and at least two components. The components are sequentially spliced circumferentially, and the inner end faces of the components form a mold cavity. The outer end faces of the components are combined to form an outer tapered surface. An inner tapered surface is provided on the inner end face of the tapered sleeve. The tapered sleeve is nested outside the components, and the inner tapered surface is in abutting fit with the outer tapered surface. The forming die frame is in a combined form, which is convenient for demolding the product after pressing and forming.

[0007] As an alternative, a limit locking mechanism is provided between adjacent components.

[0008] As an alternative, the limit locking mechanism is a groove tongue structure. The groove tongue structure includes a groove tongue protrusion provided at the end of one component and a groove tongue slot provided at the end of the adjacent component. The provision of the limit locking mechanism between adjacent components can prevent the components from shifting in position during the use of the forming module and improve the use stability of the tooling.

[0009] As an alternative, there are four components, which are two symmetrically arranged first components and two symmetrically arranged second components. The opposite side end faces of the two first components and the opposite side end faces of the two second components are joined to form a mold cavity.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: In this embodiment, a placeholder is detachably provided in the forming cavity. When the diamond layer is pressed and formed, the placeholder occupies the forming cavity of the non-diamond layer. After the diamond layer is pressed and formed, the placeholder is taken out from the forming cavity. After replenishing the material in the forming cavity of the non-diamond layer, the diamond layer and the non-diamond layer can be cold-pressed simultaneously. Compared with the prior art, the operation steps during the pressing and forming of the metal bond grinding block are simplified, and the production efficiency is improved; the forming module adopts a combined structure, which is convenient for combined use and also convenient for disassembling, thus facilitating the demolding of the product after pressing and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a top view schematic diagram of the forming die frame;

[0013] Figure 2 It is a sectional view schematic diagram of the forming die when pressing the metal bond grinding block;

[0014] In the figure: 1. Assembly, 2. Taper sleeve, 3. Upper pressure head, 4. Lower pressure head, 5. Diamond layer forming cavity, 6. Non-diamond layer forming cavity, 7. Grooved tongue structure, 8. Metal bond grinding wheel block. Detailed implementation mode

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0016] Please refer to Figure 1 and Figure 2 A forming die for a metal bond grinding wheel block includes a forming die frame, an upper pressure head 3 and a lower pressure head 4. A die cavity is arranged in the forming die frame. The upper pressure head 3 and the lower pressure head 4 are both arranged in the die cavity. The area defined by the lower end face of the upper pressure head 3 and the upper end face of the lower pressure head 4 in the die cavity is the forming cavity. The forming cavity includes a diamond layer forming cavity 5 and a non-diamond layer forming cavity 6. A placeholder is arranged in the non-diamond layer forming cavity 6, and the placeholder is detachably arranged.

[0017] The placeholder is a plate or block having the same shape as the non-diamond layer forming cavity 6. When performing the pressing and forming process of the metal bond grinding wheel block 8, the placeholder is arranged in the non-diamond layer forming cavity 6. The placeholder occupies the non-diamond layer forming cavity 6. At this time, only materials can be added into the diamond layer forming cavity 5. After feeding materials into the diamond layer forming cavity 5, the upper pressure head 3 and the lower pressure head 4 are pressurized. The upper pressure head 3 and the lower pressure head 4 cooperate to press and form the materials in the diamond layer forming cavity 5. After the diamond layer is pressed and formed, the placeholder is taken out of the forming cavity, materials are fed into the non-diamond layer forming cavity 6, and then the upper pressure head 3 and the lower pressure head 4 are pressurized. The upper pressure head 3 and the lower pressure head 4 cooperate to press and form the materials in the non-diamond layer forming cavity 6. At the same time, the non-diamond layer and the diamond layer are pressed into an integral metal bond grinding wheel block blank.

[0018] The forming die of this embodiment can effectively facilitate the forming process of the metal bond grinding wheel block 8 and is of great help to the processing of the metal bond grinding wheel block 8.

[0019] For convenient demolding, the forming mold frame includes a tapered sleeve 2 and at least two components 1. Each component 1 is arranged circumferentially and spliced circumferentially in sequence to form a mold frame structure. The inner end faces of each component 1 form the inner end face of the mold frame structure, and the outer end faces of each component 1 are combined to form the outer end face of the mold frame structure. The area inside the mold frame structure formed by the inner end faces of each component 1 is the mold cavity. The inner end face of the tapered sleeve 2 is set as an inner conical surface. The tapered sleeve 2 is nested outside the mold frame structure, and the inner end face of the tapered sleeve 2 is in abutting fit with the outer end face of the mold frame structure.

[0020] When performing the forming process of the metal bond grinding block 8, the components 1 are combined into a mold frame structure, then the tapered sleeve 2 is nested outside the mold frame structure and the mold frame structure is tightened, and then the upper punch 3, the lower punch 4 and the positioning stopper are used for the pressing and forming process of the metal bond grinding block 8.

[0021] Preferably, the taper of the outer end of the mold frame structure and the taper of the inner conical surface of the tapered sleeve 2 are preferably 1-5°.

[0022] To further stabilize the mold frame structure and prevent the occurrence of position offset between adjacent components 1, a limiting locking structure is provided between adjacent components 1. As a specific example, the limiting locking structure includes a groove tongue structure 7. The groove tongue structure 7 includes a groove tongue protrusion provided at the end of one component 1 and a groove tongue card slot provided at the end of the adjacent component 1. After adjacent two components 1 are spliced and aligned, the groove tongue protrusion of one component 1 just fits into the groove tongue card slot at the end of the adjacent component 1.

[0023] The groove tongue protrusion is preferably a hemispherical protrusion, and the groove tongue card slot is a hemispherical card slot adapted to the shape of the groove tongue protrusion.

[0024] In some embodiments, groove tongue protrusions and groove tongue card slots are respectively provided on the opposite two end faces of the component 1, so that the components 1 can be arbitrarily matched.

[0025] The connection of any adjacent components 1 corresponds to the corner of the mold cavity. This design can prevent the corners of the metal bond grinding block blank from being pressed off and avoid phenomena such as chipping and edge breakage.

[0026] As Figure 1 shown, as a preferred embodiment, there are four components 1, namely two first components and two second components. The two first components are symmetrically arranged, and their inner end faces face each other. The two second components are symmetrically arranged, and their inner end faces also face each other. The two second components are respectively on both sides of the connection line of the two first components. The four are distributed circumferentially and form a four-lobe combined structure. After the four are butted, the facing side end faces of the two first components and the facing side end faces of the two second components are connected and form a quadrilateral mold cavity.

[0027] To ensure the quality effect of the product, the fitting clearances between adjacent assemblies 1, between the upper punch 3 and the inner wall of the mold cavity, and between the lower punch 4 and the inner wall of the mold cavity are all 0.05 mm - 0.10 mm. Similarly, the fitting clearances between the placeholder stop and the upper punch 3 connected thereto, between the lower punch and the inner wall of the mold cavity, and between the placeholder stop and the inner wall of the mold cavity are all 0.05 mm - 0.10 mm.

[0028] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0029] As mentioned above, only the specific preferred embodiments of the present utility model are described, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A forming die for a metal bond grinding wheel segment, characterized in that: It includes a forming die frame, an upper punch (3) and a lower punch (4). A die cavity is arranged inside the forming die frame, and the upper punch (3) and the lower punch (4) are arranged inside the die cavity. The area defined by the lower end face of the upper punch (3) and the upper end face of the lower punch (4) inside the die cavity is a forming cavity. The forming cavity includes a diamond layer forming cavity (5) and a non-diamond layer forming cavity (6). A placeholder blocking member is arranged inside the non-diamond layer forming cavity (6), and the placeholder blocking member is detachably arranged.

2. The forming die for the metal-bonded grinding wheel block according to claim 1, characterized in that: The forming die frame includes a tapered sleeve (2) and at least two assemblies (1). Each assembly (1) is sequentially spliced along the circumferential direction, and the inner end faces of each assembly (1) form a die cavity. Moreover, the outer end faces of each assembly (1) are combined to form an outer conical surface. An inner conical surface is arranged on the inner end face of the tapered sleeve (2). The tapered sleeve (2) is nested outside each assembly (1), and the inner conical surface is in abutting fit with the outer conical surface.

3. The forming die for a metal bond grinding wheel segment according to claim 2, characterized in that: A limit locking mechanism is arranged between adjacent assemblies (1).

4. A forming die for a metal bond grinding wheel segment according to claim 3, characterized in that: The limit locking mechanism is a groove tongue structure (7). The groove tongue structure (7) includes a groove tongue protrusion arranged at the end of one assembly (1) and a groove tongue card slot arranged at the end of an adjacent assembly (1).

5. The forming die for a metal bond grinding wheel segment according to claim 4, characterized in that: There are four assemblies (1). The assemblies (1) are two symmetrically arranged first assemblies and two symmetrically arranged second assemblies. The opposite side end faces of the two first assemblies and the opposite side end faces of the two second assemblies are joined to form a die cavity.

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