Integrated forming die for multi-face CBN grinding wheel agglomerated green body

Abstract

The utility model discloses an integral forming die for a multi-surface CBN (Cubic Boron Nitride) grinding wheel agglomerated green body. The integral forming die comprises a die frame as well as an outer circular surface and end surface module, a feeding shielding module, a first component outer circular surface upper support body, a second component outer circular surface and end surface upper support body and a parallel auxiliary pressing module which are positioned in the die frame, the outer circle face end face module is of a step structure. The integrated forming die for the multi-face CBN grinding wheel agglomerated green body has a first working state and a second working state. The forming die is simple in structure and high in practicability, a multi-face CBN grinding wheel agglomerated green body can be obtained through one-time integral pressing forming, then conventional sintering is carried out, the multi-face CBN grinding wheel agglomerated green body can be obtained, and the problems that in the prior art, large-allowance coping is needed, the grinding operation difficulty is high, the delivery cycle is long, and raw materials are wasted are solved; and the quality of machined workpieces is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of forming molds for grinding wheel agglomerate blanks, in particular to an integrated forming mold for multi-faceted CBN grinding wheel agglomerate blanks. Background Art

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted by the connecting rod and converts it into torque, which is output through the crankshaft to drive other accessories on the engine. The flange surface of the crankshaft requires good roughness and high dimensional accuracy. At the same time, there are many grinding parts and they are not in the same plane, so a multi-faceted grinding wheel is needed to process it.

[0003] In the existing production, generally, regular-shaped agglomerates are first prepared, and then large-allowance grinding is carried out to machine multiple grinding surfaces to obtain multi-faceted grinding wheel agglomerates. This not only increases the difficulty of grinding operations, prolongs the delivery cycle, but also wastes a large amount of CBN abrasive and other raw materials. For the grinding surfaces of workpieces with a large height difference, the preparation difficulty is even greater. In order to reduce waste, the prior art adopts a step-by-step preparation of the outer circle working layer and the end face working layer, and then stacks and assembles them into a multi-faceted grinding wheel CBN agglomerate. Obviously, this will increase the complexity of preparation. In particular, the splicing structure will have an adverse impact on the accuracy and roughness of the workpiece during grinding, and it is rarely used in industrial production. Therefore, in view of the above problems and technical requirements, it is necessary to develop a new forming mold to avoid large-allowance grinding of multi-faceted grinding wheels and reduce the difficulty of grinding operations. Summary of the Invention

[0004] The purpose of the utility model is to provide an integrated forming mold for multi-faceted CBN grinding wheel agglomerate blanks, which has a simple structure and strong practicability. It can effectively avoid large-allowance grinding of multi-faceted CBN grinding wheels, reduce the difficulty of grinding operations, improve production efficiency, and shorten the delivery cycle.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An integrated forming mold for multi-faceted CBN grinding wheel agglomerate blanks includes a mold frame and an outer circle and end face module, a feeding shielding module, a first component upper support on the outer circle surface, a second component outer circle and upper support on the end face, and a parallel auxiliary pressing module located inside the mold frame; the outer circle and end face module is a stepped structure; the integrated forming mold for multi-faceted CBN grinding wheel agglomerate blanks has a first working state and a second working state;

[0007] In the first working state: the integrated forming mold for multi-faceted CBN grinding wheel agglomerate blanks includes a mold frame and an outer circle and end face module, a feeding shielding module, a first component upper support on the outer circle surface located inside the mold frame; the feeding shielding module and the first component upper support on the outer circle surface are located above the outer circle and end face module; the lower surface of the feeding shielding module is in close contact with the upper surface of the outer circle and end face module;

[0008] In the second working state: the integrated forming die for the polyhedral CBN grinding wheel agglomerate blank includes a die frame, an outer cylindrical surface end face module, a first component upper support on the outer cylindrical surface, a second component outer cylindrical surface and upper support on the end face, and a parallel secondary pressing module located within the die frame; the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face are located above the outer cylindrical surface end face module; the parallel secondary pressing module is located on the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face.

[0009] In the present utility model, first, the outer cylindrical surface end face module and the feeding shielding module are sequentially placed within the die frame, feeding is carried out and the first component upper support on the outer cylindrical surface is placed, then the feeding shielding module is removed, feeding is carried out and the second component outer cylindrical surface and upper support on the end face are placed, the parallel secondary pressing module is placed on the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face, and the parallel secondary pressing module is tapped to make the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face be in the same plane, and conventional pressing is carried out to obtain the polyhedral CBN grinding wheel agglomerate blank. The feeding amount shielding module is used to prevent the material from entering the second component outer cylindrical surface and the end face when feeding the first component outer cylindrical surface; the parallel secondary pressing module is used to ensure that the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face are in the same plane, and a polyhedral CBN grinding wheel agglomerate blank with excellent quality is prepared.

[0010] In the present utility model, the polyhedral CBN grinding wheel agglomerate blank is obtained by one-time integral pressing and forming, and then conventional sintering is carried out to obtain the polyhedral CBN grinding wheel agglomerate, overcoming the technical prejudice in the prior art that it is necessary to first prepare into a regular-shaped agglomerate and then carry out large-allowance grinding to machine out multiple grinding surfaces to obtain the polyhedral CBN grinding wheel agglomerate.

[0011] Preferably, the upper surface of the die frame is an arc structure; the lower surfaces of the first component upper support on the outer cylindrical surface and the second component outer cylindrical surface and upper support on the end face are arc structures; the arc structures of the die frame, the first component upper support on the outer cylindrical surface, and the second component outer cylindrical surface and upper support on the end face are the same. The arc structure is conventionally designed according to needs. After each feeding is completed, the working layer is scraped out with the same radian along the arc structure of the upper surface of the die frame, and the corresponding support is placed on the working layer, so that the prepared polyhedral CBN grinding wheel agglomerate blank is a circular structure, which saves the later grinding work compared with the plane structure.

[0012] Preferably, the upper surface of the outer cylindrical surface end face module is an arc structure. This makes the inner wall of the prepared polyhedral CBN grinding wheel agglomerate blank have a certain radian, which is convenient for fitting with the base body and is firmly consolidated.

[0013] Preferably, the outer cylindrical surface and end face module is a split structure. Further, the outer cylindrical surface and end face module includes a front outer cylindrical surface and end face module, a front outer cylindrical surface module, a rear outer cylindrical surface and end face module, and a rear outer cylindrical surface module arranged in sequence; the height of the front outer cylindrical surface module is the same as that of the rear outer cylindrical surface and end face module; the height of the front outer cylindrical surface and end face module is greater than that of the front outer cylindrical surface module; the height of the rear outer cylindrical surface module is less than that of the front outer cylindrical surface module. Still further, the multi-faceted CBN grinding wheel compact blank integrally formed mold further includes a feeding amount control module; the feeding amount control module is provided with two grooves; the outer cylindrical surface and end face module is located on the feeding amount control module; the front outer cylindrical surface module and the rear outer cylindrical surface module of the outer cylindrical surface and end face module are respectively located in the grooves.

[0014] Preferably, in the second working state, the number of the parallel secondary pressing modules is 2, one is located on the upper support of the first component outer cylindrical surface and the upper support of the second component outer cylindrical surface and end face, and the other is located under the outer cylindrical surface and end face module.

[0015] In the present utility model, the feeding amount control module is used to control the heights of different modules in the front and rear sections, so as to adjust the feeding amount above the modules and ensure that the densities of the multi-faceted CBN grinding wheel compact blanks prepared are comparable. Preferably, after two feedings are completed, the mold is turned over, the feeding amount control module is taken out and the parallel secondary pressing module is put in, and the parallel secondary pressing module is tapped to make the front outer cylindrical surface and end face module, the front outer cylindrical surface module, the rear outer cylindrical surface and end face module, and the rear outer cylindrical surface module be in the same plane.

[0016] Preferably, one end of the feeding shielding module is located inside the mold frame. The upper surface of the feeding shielding module is higher than the upper surface of the mold frame, which is convenient for taking and avoids damaging the unformed multi-faceted CBN grinding wheel compact blank when taking out the feeding shielding module.

[0017] Preferably, the lower surface of the feeding shielding module is a stepped structure. The stepped structure of the feeding shielding module cooperates with the stepped structure of the outer cylindrical surface and end face module to improve the stability of the feeding shielding module and avoid damaging the unformed multi-faceted CBN grinding wheel compact blank.

[0018] Due to the application of the above technical solution, the multi-faceted CBN grinding wheel agglomerate blank integrally formed mold of the present utility model has the following advantages: First, compared with the prior art, the present utility model can integrally press and form a multi-faceted CBN grinding wheel agglomerate blank at one time, and then perform conventional sintering to obtain a multi-faceted CBN grinding wheel agglomerate, solving the problems of large allowance grinding, high difficulty in grinding operation, long delivery cycle, and waste of raw materials in the prior art; Second, the multi-faceted CBN grinding wheel agglomerate prepared by using the mold of the present utility model is an integral structure. Compared with the splicing structure, it avoids affecting the accuracy and roughness of the workpiece during workpiece processing; Third, the upper surface of the mold frame, the upper part support body on the outer circular surface of the first component, the outer circular surface of the second component and the lower surface of the upper part support body on the end surface are designed as arc structures, and the upper surface of the outer circular surface end face module is designed as an arc structure, making the prepared multi-faceted CBN grinding wheel agglomerate a circular structure, saving the later grinding work. At the same time, the surface bonded to the matrix has a curvature, which is more conducive to fitting with the matrix and ensuring the firm consolidation of the multi-faceted CBN grinding wheel agglomerate and the matrix; Fourth, the outer circular surface end face module of the present utility model is a split structure, which cooperates with the feeding amount control module to make the density of the prepared multi-faceted CBN grinding wheel agglomerate uniform and the quality of the processed workpiece more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the multi-faceted CBN grinding wheel agglomerate blank integrally formed mold in the first working state of Embodiment 1 (the upper part support body on the outer circular surface of the first component is omitted).

[0020] Figure 2 is a schematic structural diagram of the multi-faceted CBN grinding wheel agglomerate blank integrally formed mold in the pressing state of Embodiment 1.

[0021] Figure 3 is a schematic structural diagram of the feeding amount control module of Embodiment 1.

[0022] Figure 4 is a schematic structural diagram of the special-shaped ceramic-bonded CBN grinding wheel agglomerate of the application embodiment.

[0023] Figure 5 is a schematic structural diagram of the special-shaped ceramic-bonded CBN grinding wheel of the application embodiment.

[0024] Wherein: mold frame 1, outer circular surface end face module 2, feeding shielding module 3, upper part support body 4 on the outer circular surface of the first component, upper part support body 5 on the outer circular surface and end face of the second component, parallel secondary pressing module 6, feeding amount control module 7, steel matrix 8, front section outer circular surface and end face module 201, front section outer circular surface module 202, rear section outer circular surface and end face module 203, rear section outer circular surface module 204, groove 701. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments. The specific components involved are prior art, and the connections and usage methods between specific components are conventional techniques.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the accompanying drawings, which are only for convenience of description and cannot be construed as a limitation to the technical solution of the present application.

[0027] The raw materials for preparing the multi-faceted CBN grinding wheel agglomerate blank are existing products and only need to meet the conventional requirements of grinding wheels. The creativity of the present utility model lies in the new molding die, which can integrally press and form a multi-faceted CBN grinding wheel agglomerate blank at one time, and then carry out conventional sintering to obtain a multi-faceted CBN grinding wheel agglomerate, without large allowance grinding, improving production efficiency, effectively reducing waste of raw materials, and the prepared multi-faceted CBN grinding wheel agglomerate is an integral structure with uniform density and more stable quality of the machined workpiece. Embodiment 1

[0028] As Figures 1 to 3 shown:

[0029] A one-piece molding die for a multi-faceted CBN grinding wheel agglomerate blank, comprising a die frame 1 and an outer circular surface end face module 2, a feeding shielding module 3, a first component upper support on the outer circular surface 4, a second component upper support on the outer circular surface and end face 5, a parallel secondary pressing module 6, and a feeding amount control module 7 located within the die frame.

[0030] The upper surface of the die frame is an arc structure; the lower surfaces of the first component upper support on the outer circular surface and the second component upper support on the outer circular surface and end face are arc structures; the arc structures of the die frame, the first component upper support on the outer circular surface, and the second component upper support on the outer circular surface and end face are consistent; the upper surface of the outer circular surface end face module is an arc structure. The arc structure is conventionally designed as required.

[0031] The outer circular surface end face module is a split structure, including a front outer circular surface and end face module 201, a front outer circular surface module 202, a rear outer circular surface and end face module 203, and a rear outer circular surface module 204 arranged in sequence; the height of the front outer circular surface module is the same as that of the rear outer circular surface and end face module, the height of the front outer circular surface and end face module is greater than that of the front outer circular surface module, and the height of the rear outer circular surface module is less than that of the front outer circular surface module, forming a stepped structure.

[0032] The feeding amount control module is provided with two grooves 701.

[0033] The multi - faceted CBN grinding wheel agglomerate blank integrally - formed mold has a first working state and a second working state;

[0034] In the first working state: The multi - faceted CBN grinding wheel agglomerate blank integrally - formed mold includes a mold frame and an outer - circle surface end - face module, a feeding shielding module, and a first - component upper outer - circle surface support body located within the mold frame; The feeding shielding module is located above the rear - section outer - circle surface and end - face module and the rear - section outer - circle surface module, and its lower surface is in fitting contact with the upper surfaces of the rear - section outer - circle surface and end - face module and the rear - section outer - circle surface module; The first - component upper outer - circle surface support body is located above the front - section outer - circle surface and end - face module and the front - section outer - circle surface module; A first cavity is formed among the mold frame, the front - section outer - circle surface and end - face module, the front - section outer - circle surface module, the first - component upper outer - circle surface support body, and the feeding shielding module, and powder is placed to form a first - component outer - circle surface working layer;

[0035] In the second working state: The multi - faceted CBN grinding wheel agglomerate blank integrally - formed mold includes a mold frame and an outer - circle surface end - face module, a first - component upper outer - circle surface support body, a second - component outer - circle surface and upper - end - face support body, and a parallel secondary pressing module; The first - component upper outer - circle surface support body is located above the front - section outer - circle surface and end - face module and the front - section outer - circle surface module, and the second - component outer - circle surface and upper - end - face support body is located above the rear - section outer - circle surface and end - face module and the rear - section outer - circle surface module; A second cavity is formed among the mold frame, the rear - section outer - circle surface and end - face module, the rear - section outer - circle surface module, the second - component outer - circle surface and upper - end - face support body, and the first - component outer - circle surface working layer, and powder is placed to form a second - component outer - circle surface and end - face working layer.

[0036] In this embodiment, in the first working state and the second working state, the multi - faceted CBN grinding wheel agglomerate blank integrally - formed mold further includes a feeding amount control module; The outer - circle surface end - face module is located on the feeding amount control module; The front - section outer - circle surface module and the rear - section outer - circle surface module are respectively located within the grooves.

[0037] In this embodiment, in the second working state, the number of the parallel secondary pressing modules is 2. One is located on the first - component upper outer - circle surface support body and the second - component outer - circle surface and upper - end - face support body, and the other is located under the outer - circle surface end - face module.

[0038] In this embodiment, one end of the feeding shielding module is located within the mold frame; The lower surface of the feeding shielding module is a stepped structure. The stepped structure cooperates with the stepped structure of the outer - circle surface end - face module to improve the stability of the feeding shielding module.

[0039] The usage method of the multi - faceted CBN grinding wheel agglomerate blank integrally - formed mold in this embodiment is as follows:

[0040] (1) PressFigure 1 Take the assembled mold shown in the figure, then weigh the theoretical feeding amount, feed materials into the first cavity, scrape out an arc that is the same as the upper surface of the mold frame, and place the support body on the upper part of the outer circle surface of the first component;

[0041] (2) Remove the feeding shielding module, then weigh the theoretical feeding amount, feed materials into the second cavity, scrape out an arc that is the same as the upper surface of the mold frame, and place the support body on the upper part of the outer circle surface and the end surface of the second component;

[0042] (3) Place the parallel auxiliary pressing module on the support body on the upper part of the outer circle surface of the first component and the support body on the upper part of the outer circle surface and the end surface of the second component and tap it, so that the support body on the upper part of the outer circle surface of the first component and the support body on the upper part of the outer circle surface and the end surface of the second component are on the same plane;

[0043] (4) Flip the mold, remove the feeding amount control module, place the parallel auxiliary pressing module and tap it, so that the front outer circle surface and end surface module, the front outer circle surface module, the rear outer circle surface and end surface module, and the rear outer circle surface module are on the same plane;

[0044] (5) Put the whole mold into a press for pressing (existing process), and after demolding, a multi-faceted CBN grinding wheel compact blank is obtained. Example Two

[0045] On the basis of Example One, the difference in this example is that the outer circle surface and end surface module is an integral structure, the feeding amount control module and the parallel auxiliary pressing module below it are omitted, and the rest are the same. The prepared multi-faceted CBN grinding wheel compact blank is hardened according to the existing process to obtain a multi-faceted CBN grinding wheel compact, and the hardness data deviation of each part is relatively large, and the quality of the machined workpiece is not as good as that of Example One.

[0046] Application Example

[0047] Use the integral forming mold of the multi-faceted CBN grinding wheel compact in Example One to prepare a special-shaped ceramic bond CBN grinding wheel compact blank. The raw materials for preparing the special-shaped ceramic bond CBN grinding wheel compact blank are existing products. The prepared special-shaped ceramic bond CBN grinding wheel compact blank is hardened according to the existing process, and is ground with a small allowance according to requirements to obtain a special-shaped ceramic bond CBN grinding wheel compact, as Figure 4 shown. Bond the special-shaped ceramic bond CBN grinding wheel compact to the steel matrix 8 according to the conventional method, and then through conventional machining, a special-shaped ceramic bond CBN grinding wheel is obtained, as Figure 5 shown. The machining allowance is 0.5 mm, and the delivery cycle is 30 days. Comparative Example One

[0048] For the existing special-shaped ceramic-bonded CBN grinding wheels, it is necessary to first prepare them into regular-shaped agglomerates, and then grind and process a large amount of material to produce multiple grinding surfaces, so as to obtain the special-shaped ceramic-bonded CBN grinding wheel agglomerates. The special-shaped ceramic-bonded CBN grinding wheel agglomerates are bonded to the steel matrix according to the conventional method, and then through conventional machining, the special-shaped ceramic-bonded CBN grinding wheel is obtained. The machining allowance is 5 mm, and the delivery cycle is 45 days.

[0049] It can be seen that the grinding size of the special-shaped ceramic-bonded CBN grinding wheel prepared by the present utility model is significantly reduced, the delivery cycle is shortened, and the problems of large allowance grinding, high difficulty in grinding operation, long delivery cycle, and waste of raw materials in the prior art are solved.

[0050] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications and improvements can be made, and these should also be regarded as belonging to the protection scope of the present utility model.

Claims

1. A multi-faceted CBN grinding wheel compact blank integrated forming die, characterized in that: It includes a mold frame and an outer circular surface end face module, a feeding shielding module, a first component upper support on the outer circular surface, a second component outer circular surface and upper support on the end face, and a parallel auxiliary pressing module located within the mold frame; the outer circular surface end face module is a stepped structure; the integrated forming mold for the multi-faceted CBN grinding wheel agglomerate blank has a first working state and a second working state; In the first working state: The integrated forming mold for the multi-faceted CBN grinding wheel agglomerate blank includes a mold frame and an outer circular surface end face module, a feeding shielding module, and a first component upper support on the outer circular surface located within the mold frame; the feeding shielding module and the first component upper support on the outer circular surface are located above the outer circular surface end face module; the lower surface of the feeding shielding module is in close contact with the upper surface of the outer circular surface end face module; In the second working state: The integrated forming mold for the multi-faceted CBN grinding wheel agglomerate blank includes a mold frame and an outer circular surface end face module, a first component upper support on the outer circular surface, a second component outer circular surface and upper support on the end face, and a parallel auxiliary pressing module located within the mold frame; the first component upper support on the outer circular surface, the second component outer circular surface and upper support on the end face are located above the outer circular surface end face module; the parallel auxiliary pressing module is located on the first component upper support on the outer circular surface and the second component outer circular surface and upper support on the end face.

2. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 1, wherein: The upper surface of the mold frame is an arc structure; the lower surfaces of the first component upper support on the outer circular surface and the second component outer circular surface and upper support on the end face are arc structures; The arc structures of the mold frame, the first component upper support on the outer circular surface, and the second component outer circular surface and upper support on the end face are consistent with each other.

3. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 1, characterized in that: The upper surface of the outer circular surface end face module is an arc structure.

4. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 1, wherein: The outer circular surface end face module is a split structure.

5. The integrated forming die for the polyhedral CBN grinding wheel agglomerate blank according to claim 4, characterized in that: The outer circular surface end face module includes a front-segment outer circular surface and end face module, a front-segment outer circular surface module, a rear-segment outer circular surface and end face module, and a rear-segment outer circular surface module arranged in sequence; the height of the front-segment outer circular surface module is the same as that of the rear-segment outer circular surface and end face module; the height of the front-segment outer circular surface and end face module is greater than that of the front-segment outer circular surface module; the height of the rear-segment outer circular surface module is less than that of the front-segment outer circular surface module.

6. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 5, characterized in that: In the first working state and the second working state, the integrated forming mold for the multi-faceted CBN grinding wheel agglomerate blank further includes a feeding amount control module; the feeding amount control module is provided with two grooves; the outer circular surface end face module is located on the feeding amount control module.

7. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 6, characterized in that: The front-segment outer circular surface module and the rear-segment outer circular surface module of the outer circular surface end face module are respectively located within the grooves.

8. The multi-faceted CBN grinding wheel agglomerate blank integrally formed mold according to claim 1, characterized in that: In the second working state, the number of the parallel auxiliary pressing modules is 2, one is located on the first component upper support on the outer circular surface and the second component outer circular surface and upper support on the end face, and the other is located under the outer circular surface end face module.

9. The integrated forming die for the multi-faceted CBN grinding wheel agglomerate blank according to claim 1, characterized in that: One end of the feeding shielding module is located within the mold frame.

10. The multi-faceted CBN grinding wheel agglomerate blank integrally formed mold according to claim 1, wherein: The lower surface of the feeding shielding module is a stepped structure.

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