Ceramic porous structure internal grinding wheel one-time forming die

Abstract

The utility model discloses a one-step forming die for an internal grinding wheel with a ceramic porous structure. The one-step forming die comprises an outer die, an inner die, an upper pressing block and a lower pressing block, the outer mold is arranged on the inner mold in a sleeving manner; the upper pressing block and the lower pressing block are positioned in the inner die; a distribution rod is arranged on the inner wall of the inner mold; the inner mold is of an assembled structure. The one-time forming die for the ceramic porous-structure internal grinding wheel is simple in structure and high in practicability, can be directly pressed and formed to obtain a ceramic porous-structure internal grinding wheel agglomerated green body with a porous structure, solves the problem that additional punching is needed in the existing production, and improves the production efficiency. Waste of raw materials and possible damage to the grinding wheel in the punching process are avoided, the production efficiency is improved, and meanwhile the quality of the inner circle grinding wheel and the quality of a machined workpiece are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grinding wheel forming die technical field especially relates to a ceramic porous structure inner circle grinding wheel one time forming die. BACKGROUND

[0002] ‌The inner circle grinding wheel is a kind of grinding tool for grinding cylindrical, conical or other shape hole surface and its end face, usually by abrasive, binder and pore.‌In existing production application, because the speed of inner circle grinding wheel is high in processing process, line speed is low, requirement superhard grinding wheel sharpness is good, so ceramic binder superhard grinding wheel is common in inner circle grinding wheel. Because ceramic binder has certain hard brittle, lead to in processing process, it is easy to appear bad heat dissipation, grinding wheel abnormal situation.

[0003] At present, the existing production adopts punching equipment to carry out hole opening to grinding wheel to improve the heat dissipation, chip removal efficiency of grinding wheel, however, the hole opening mode of grinding wheel not only increases operation difficulty, wastes raw materials, also causes damage to grinding wheel in hole opening process, appears microcrack. The applicant previously disclosed a kind of punching device of ceramic binder cBN inner circle grinding wheel blank, can satisfy the hole opening demand of ceramic grinding wheel blank, guarantee that grinding wheel blank does not occur damage when hole opening, accurately position grinding wheel blank, guarantee the precision of punching, but still there is the problem of raw material waste. Therefore, in view of above problems and technical needs, it is necessary to develop new forming die, avoid the raw material waste of ceramic binder inner circle grinding wheel and the damage phenomenon in punching process. SUMMARY

[0004] The utility model discloses a kind of ceramic porous structure inner circle grinding wheel one time forming die, utilize mould and can be directly pressed into shape to obtain the ceramic porous structure inner circle grinding wheel lump blank with porous structure, without additional punching process, avoid the raw material waste and the damage that possibly causes to grinding wheel in punching process, improve production efficiency.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A kind of ceramic porous structure inner circle grinding wheel one time forming die, including outer die, inner die, upper pressing block, lower pressing block;The outer die is sleeved on the inner die;The upper pressing block, lower pressing block are located in the inner die;The inner wall of the inner die is provided with distribution rod;The inner die is assembled structure.

[0007] In the utility model, outer die is used to fix inner die;Inner die is assembled structure, to facilitate demoulding;The inner wall of inner die is provided with distribution rod, to form the porous structure of ceramic inner circle grinding wheel, without additional punching process.

[0008] Preferably, the outer sidewall of the outer mold is provided with a groove in the middle. The groove can be used as a fulcrum when the mold is taken, facilitating operation.

[0009] Preferably, the height of the outer mold is less than the height of the inner mold. The outer mold is used to fix the inner mold, and the height of the outer mold is designed to be less than the height of the inner mold on the premise that the inner mold can be fixed, so as to save mold materials.

[0010] Preferably, the inner mold is a hollow circular truncated cone structure. The contact surface between the inner wall of the outer mold and the outer wall of the inner mold is a slope, and the two are in close contact and fit tightly to ensure that the grinding wheel compact body has uniform organization distribution and tight combination during pressing.

[0011] Preferably, the inner mold comprises a main forming body and an auxiliary forming module; the inner wall of the main forming body is provided with a distribution rod. Further preferably, the auxiliary forming module comprises a first auxiliary forming body and two second auxiliary forming bodies; the two second auxiliary forming bodies are respectively located on the two sides of the first auxiliary forming body. The inner mold of the assembled structure facilitates demolding.

[0012] Preferably, the two sides of the main forming body are provided with grooves; one side of the second auxiliary forming body is provided with a lug; and the lug is located in the groove. The groove and the lug are matched to ensure the assembly precision of the mold.

[0013] Further, the inner diameter of the inner mold is 1-50mm. Preferably, the inner diameter of the inner mold is 2-10mm. The cavity of the inner mold is used for feeding to prepare a ceramic porous structure inner circular grinding wheel compact, i.e. the abrasive layer of the ceramic porous structure inner circular grinding wheel.

[0014] Preferably, the diameter of the distribution rod is 1-5mm. The distribution rod is used to form the porous structure of the ceramic inner circular grinding wheel, without the need for additional perforating process.

[0015] The ceramic porous structure inner circular grinding wheel prepared by the mold of the utility model can store cooling liquid in the through hole during liquid cooling inner circular grinding process, reducing grinding heat; during dry inner circular grinding process, the through hole can improve the chip capacity and chip removal capacity of the grinding wheel, improve the sharpness of the grinding wheel, and reduce the grinding heat.

[0016] The ceramic porous structure inner circle grinding wheel one-time forming die has the following advantages: first, compared with the prior art, the ceramic porous structure inner circle grinding wheel block body with the porous structure can be formed by one-time pressing, and no additional punching process is needed, so that the grinding wheel is not damaged, the technical problem that the prior art can only form through holes by the punching equipment is overcome, the operation difficulty is reduced, the production efficiency is improved, and the waste of raw materials is avoided; second, the inner die is a detachable structure, the recess of the main forming body is matched with the lug of the second auxiliary forming body, the assembly precision of the die is ensured, and the precise inner circle grinding wheel block body is prepared. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a top view of the ceramic porous structure inner circle grinding wheel one-time forming die of example one (omitting the upper pressing block and the lower pressing block).

[0018] Figure 2 is a perspective view of the main forming body.

[0019] Figure 3 is a sectional view of the outer die.

[0020] Figure 4 is a top view of the ceramic porous structure inner circle grinding wheel one-time forming die of example two (omitting the upper pressing block and the lower pressing block).

[0021] Wherein: the outer die 1, the inner die 2, the distribution rod 3, the main forming body 201, the first auxiliary forming body 202, and the second auxiliary forming body 203. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings and the preferred embodiments, and the specific components involved are the prior art, and the connection between the specific components and the use method are the conventional technology.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terms used in the specification are only for the purpose of describing the specific embodiments and are not intended to limit the utility model, for example, the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or position based on the orientation or position shown in the drawings, which is only for the purpose of description and cannot be understood as a limitation on the technical solution.

[0024] The upper pressing block and the lower pressing block used in the utility model are conventional products, which can be designed according to the shape of the mold cavity, and are not specifically marked in the drawings, which does not affect the understanding of the utility model by the person skilled in the art.

[0025] The raw material for preparing the ceramic porous structure inner circular grinding wheel is the existing product, which meets the conventional requirements of the grinding wheel. Example one

[0026] As Figures 1 to 3 shown:

[0027] A one-time forming die for a ceramic porous structure inner circular grinding wheel, comprising an outer die 1, an inner die 2, an upper pressing block, and a lower pressing block; the outer die is sleeved on the inner die; the upper pressing block and the lower pressing block are located in the inner die; the inner die is a spliced structure.

[0028] The middle part of the outer side wall of the outer die is provided with a groove; the inner die is a hollow circular truncated cone structure with an inner diameter of 5 mm; the height of the outer die is consistent with the height of the inner die. The contact surface between the inner wall of the outer die and the outer wall of the inner die is a bevel, and the two are in close contact and tight fit to ensure that the grinding wheel block blank has uniform organization distribution and tight combination during the pressing process.

[0029] The inner die comprises a main forming body 201 and an auxiliary forming module; the inner wall of the main forming body is provided with a distribution rod 3 with a diameter of 2 mm. The auxiliary forming module comprises a first auxiliary forming body 202 and two second auxiliary forming bodies 203; the two second auxiliary forming bodies are respectively located on the two sides of the first auxiliary forming body.

[0030] The two sides of the main forming body are provided with grooves; one side of the second auxiliary forming body is provided with a lug; the lug is located in the groove.

[0031] The use method of the one-time forming die for the ceramic porous structure inner circular grinding wheel of the embodiment is as follows:

[0032] (1) Assemble the auxiliary forming module, and then sleeve the outer die on the auxiliary forming module, and then sequentially put in the lower pressing block, the main forming body, then weigh the theoretical feeding amount, and feed into the mold cavity;

[0033] (2) Put the upper pressing block into the mold cavity;

[0034] (3) Perform cold pressing (existing process) by the press to obtain the ceramic porous structure inner circular grinding wheel block blank. Example two

[0035] On the basis of example one, the difference of the embodiment is that the grooves on the two sides of the main forming body and the lug on one side of the second auxiliary forming body are omitted, as shown in Figure 4 , and the rest is the same. Example three

[0036] Based on the first embodiment, the difference of this embodiment is that, under the premise that the inner mold can be fixed, the height of the outer mold is adjusted to be smaller than the height of the inner mold, and the rest is the same.

[0037] Control Example

[0038] The existing ceramic porous structure internal grinding wheel has a porous structure formed by punching holes using conventional punching equipment. Example 4

[0039] With reference to the method of using the above-mentioned mold, the mold of Example 1 is used to prepare a ceramic porous structure internal cylindrical grinding wheel agglomerate blank, and the raw material formula for preparing the ceramic porous structure internal cylindrical grinding wheel agglomerate blank is consistent with that of the control example. The prepared ceramic porous structure internal cylindrical grinding wheel agglomerate blank is hardened according to the existing process to obtain a ceramic porous structure internal cylindrical grinding wheel agglomerate. The ceramic porous structure internal cylindrical grinding wheel agglomerate is bonded to a steel substrate according to a conventional method to obtain a ceramic porous structure internal cylindrical grinding wheel. The ceramic porous structure internal cylindrical grinding wheel agglomerate constitutes the abrasive layer of the ceramic porous structure internal cylindrical grinding wheel, which has a thickness of 5 mm and a through-hole diameter of 2 mm.

[0040] Application Experiment

[0041] The grinding wheels of the control example and Example 4 were installed on an internal grinding machine (existing equipment) and used to machine a powder metallurgy compressor cylinder using conventional methods. The grinding wheel of Example 4 consistently and stably machined the workpiece without any anomalies. The workpieces were of acceptable quality, with accuracy and roughness meeting production requirements. However, the grinding wheel of the control example exhibited clogging and cracking during machining.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be considered to fall within the scope of protection of the present invention.

Claims

1. A one-step forming die for a ceramic porous internal grinding wheel, characterized by: It includes an outer mold, an inner mold, an upper pressing block and a lower pressing block; the outer mold is sleeved on the inner mold; the upper pressing block and the lower pressing block are located in the inner mold; the inner wall of the inner mold is provided with a distribution rod; the inner mold is an assembled structure.

2. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: A groove is provided in the middle of the outer side wall of the outer mold.

3. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: The height of the outer mold is smaller than that of the inner mold.

4. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: The inner mold is a hollow frustum structure.

5. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: The inner mold includes a main forming body and an auxiliary forming module; the inner wall of the main forming body is provided with a distribution rod.

6. The one-step forming die for the ceramic porous internal grinding wheel according to claim 5, characterized in that: The auxiliary forming module includes a first auxiliary forming body and two second auxiliary forming bodies.

7. The one-step forming die for the ceramic porous internal grinding wheel according to claim 6, characterized in that: The two second auxiliary forming bodies are respectively located on both sides of the first auxiliary forming body.

8. The one-step forming die for the ceramic porous internal grinding wheel according to claim 7, characterized in that: Grooves are provided on both sides of the main forming body; a lug is provided on one side of the second auxiliary forming body; and the lug is located in the groove.

9. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: The inner diameter of the inner mold is 1-50 mm.

10. The one-step forming die for the ceramic porous internal grinding wheel according to claim 1, characterized in that: The diameter of the distribution rod is 1-5 mm.

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