阅读说明：本技术 一种铝基砂轮的制备方法及砂轮 (Preparation method of aluminum-based grinding wheel and grinding wheel ) 是由 印鹏 于 2021-01-21 设计创作，主要内容包括：本发明属于磨具技术领域,具体涉及一种铝基砂轮的制备方法及砂轮。本发明提供了一种铝基砂轮的制备工艺,首先制得磨料环再和基体进行粘接,避免了基体在随磨料层一起烧结压制过程中发生变形等带来的质量问题,提高了产品合格率。本发明提供了一种重量更轻的砂轮,相对于同体积的钢基体砂轮,成品重量降低了三分之二,降低了磨床的主轴负载,减少了轴承的损耗,提高了磨床的寿命。(The invention belongs to the technical field of grinding tools, and particularly relates to a preparation method of an aluminum-based grinding wheel and the grinding wheel. The invention provides a preparation process of an aluminum-based grinding wheel, which is characterized in that a grinding material ring is prepared and then is bonded with a base body, so that the quality problems caused by deformation and the like of the base body in the sintering and pressing process along with a grinding material layer are avoided, and the product percent of pass is improved. Compared with the steel matrix grinding wheel with the same volume, the grinding wheel with lighter weight provided by the invention has the advantages that the weight of a finished product is reduced by two thirds, the load of a main shaft of a grinding machine is reduced, the loss of a bearing is reduced, and the service life of the grinding machine is prolonged.)

1. The preparation process of the aluminum-based grinding wheel is characterized by comprising the following steps of:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product;

s6: and machining the semi-finished product to obtain a finished product.

2. The process for preparing the aluminum-based grinding wheel according to claim 1, wherein the mixing time of the grinding material and the bonding agent in the step 1 is 0.5-1.5 hours.

3. The process for preparing an aluminum-based grinding wheel according to claim 1, wherein the abrasive is diamond or CBN.

4. The process for preparing an aluminum-based grinding wheel according to claim 1, wherein the binder is selected from any one or more of cobalt powder, iron powder, silver powder, tin powder, nickel powder, copper powder, graphite and silicon carbide.

5. The process for preparing an aluminum-based grinding wheel as claimed in claim 1, wherein the sintering temperature is 700 ℃ and 1000 ℃ and the sintering time is 1-2 h.

6. The process for preparing an aluminum-based grinding wheel according to claim 1, wherein the pressing pressure is 10 to 100T.

7. The process for preparing an aluminum-based grinding wheel according to claim 1, wherein the die in step 2 is a heat-resistant steel die.

8. The process for preparing the aluminum-based grinding wheel according to claim 1, wherein the machining mode in the step 3 is electromachining.

9. A grinding wheel obtained by the process for preparing an aluminum-based grinding wheel according to any one of claims 1 to 8, comprising an abrasive ring (1) and an aluminum substrate (2); the abrasive ring (1) is arranged on the outer ring of the aluminum substrate (2).

10. A grinding wheel according to claim 9, characterized in that the aluminum matrix stock is 7-series aircraft aluminum.

Technical Field

The invention belongs to the technical field of grinding tools, and particularly relates to a preparation method of an aluminum-based grinding wheel and the grinding wheel.

Background

Diamond is the hardest material in nature, and CBN is a material that is second only in hardness to diamond. The grinding tool made of the diamond or CBN serving as the grinding material has excellent sharpness and wear resistance, can greatly improve the processing efficiency and the stability of the processing quality of products, and has wider and wider application.

The conventional grinding wheel production process is to press an abrasive layer on a substrate, and because the sintering temperature of the metal bond grinding wheel reaches 700-1000 ℃, which exceeds the melting point of aluminum, the common metal bond grinding wheel product adopts a steel substrate. But the density of iron reaches 7.8g/cm³And the density of aluminum is only 2.7g/cm³The weight of the grinding wheel using the iron matrix is 3 times of that of the aluminum matrix, so that the load of the main shaft is increased, the bearing is easy to damage, the service life of the grinding machine is shortened, and the inertia of the grinding wheel during rotation is also reducedThe machine tool generates vibration, which affects the quality and precision of processing.

Disclosure of Invention

Aiming at the problems, the invention provides a preparation process of an aluminum-based grinding wheel, which comprises the following steps:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product; in the step, high-strength glue is selected to ensure the bonding force between the base body and the grinding material layer, so that the grinding wheel can rotate at high speed without ring shedding when in use.

S6: and machining the semi-finished product to obtain a finished product.

As a preferable technical scheme, the mixing time of the grinding material and the bonding agent in the step 1 is 0.5-1.5 h.

As a preferred technical scheme, the abrasive is diamond or CBN.

As a preferable technical solution, the binder is selected from any one or a combination of a plurality of cobalt powder, iron powder, silver powder, tin powder, nickel powder, copper powder, graphite, and silicon carbide.

As a preferred technical scheme, the sintering temperature is 700-1000 ℃, and the sintering time is 1-2 h.

As a preferred technical scheme, the pressing pressure is 10-100T.

As a preferable technical scheme, the mould in the step 2 is a heat-resistant steel mould.

As a preferable technical scheme, the processing mode in the step 3 is electromachining. The inner circle of the grinding material layer of the metal binding agent is processed electrically, so that the problem that the metal binding agent grinding wheel cannot be dressed is solved, and the roundness and the size precision are ensured.

The grinding ring is made of the grinding materials firstly, and then the grinding ring is fixedly connected with the aluminum base body, so that the influence on the base body when the grinding ring is processed in the existing production mode is avoided, the requirements on the characteristics of the base body such as the melting point and the like are reduced, the selection range is expanded, the aluminum is allowed to be used as the base body of the grinding wheel, the whole weight of the grinding wheel is reduced, the manufacturing precision is improved, and multiple performances are improved.

The invention also provides a grinding wheel prepared by the preparation process of the aluminum-based grinding wheel, which comprises a grinding ring and an aluminum matrix; the abrasive ring is disposed on the aluminum substrate outer ring.

As a preferable technical scheme, the grade of the raw material of the aluminum matrix is 7-series aviation aluminum.

Has the advantages that:

(1) compared with the steel matrix grinding wheel with the same volume, the grinding wheel with lighter weight provided by the invention has the advantages that the weight of a finished product is reduced by two thirds, the load of a main shaft of a grinding machine is reduced, the loss of a bearing is reduced, and the service life of the grinding machine is prolonged.

(2) By selecting the aluminum substrate, the overall quality of the grinding wheel is reduced, so that the grinding wheel can be applied to a low-power grinding machine, the application range of the grinding wheel is wider, and the threshold of a production enterprise is reduced.

(3) The machining difficulty of aluminium is less than the iron base member for it is more convenient to process, can reach higher precision moreover, and when the emery wheel was rotatory at a high speed (10000 revolutions/Min for example), main shaft and the lathe vibrations that have reduced the unbalanced bring of emery wheel have improved the quality and the processingquality of product.

(4) The invention provides a preparation process of an aluminum-based grinding wheel, which is characterized in that a grinding material ring is prepared and then is bonded with a base body, so that the quality problems caused by deformation and the like of the base body in the sintering and pressing process along with a grinding material layer are avoided, and the product percent of pass is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale.

FIG. 1 is a schematic view of a grinding wheel according to the present invention;

1-abrasive ring, 2-aluminum matrix.

Detailed Description

The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein.

When describing embodiments of the present application, the use of "preferred," "preferably," "more preferred," and the like, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

The invention provides a preparation process of an aluminum-based grinding wheel, which comprises the following steps:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product; in the step, high-strength glue is selected to ensure the bonding force between the base body and the grinding material layer, so that the grinding wheel can rotate at high speed without ring shedding when in use.

S6: and machining the semi-finished product to obtain a finished product.

The grinding ring is made of the grinding materials firstly, and then the grinding ring is fixedly connected with the aluminum base body, so that the influence on the base body when the grinding ring is processed in the existing production mode is avoided, the requirements on the characteristics of the base body such as the melting point and the like are reduced, the selection range is expanded, the aluminum is allowed to be used as the base body of the grinding wheel, the whole weight of the grinding wheel is reduced, the manufacturing precision is improved, and multiple performances are improved.

In some preferred embodiments, the mixing time of the abrasive and the bonding agent in the step 1 is 0.5-1.5 h.

In some preferred embodiments, the abrasive is diamond or CBN. Preferably, the abrasive is diamond.

In some preferred embodiments, the binder is selected from any one or a combination of cobalt powder, iron powder, silver powder, tin powder, nickel powder, copper powder, graphite, and silicon carbide.

In some preferred embodiments, the sintering temperature is 700-1000 ℃, and the sintering time is 1-2 h.

In some preferred embodiments, the pressing pressure is 10 to 100T.

In some preferred embodiments, the mold of step 2 is a heat resistant steel mold. The deformation of the abrasive ring sintered at high temperature is small, and the abrasive ring is convenient to assemble with an aluminum substrate.

In some preferred embodiments, the step 3 processing is electro-processing. The inner circle of the grinding material layer of the metal binding agent is processed electrically, so that the problem that the metal binding agent grinding wheel cannot be dressed is solved, and the roundness and the size precision are ensured.

The invention also provides a grinding wheel prepared by the preparation process of the aluminum-based grinding wheel, which comprises a grinding ring and an aluminum matrix; the abrasive ring is disposed on the aluminum substrate outer ring.

In some preferred embodiments, the aluminum substrate stock is 7-series aircraft aluminum.

Examples

The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.

Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

Example 1

The invention provides a preparation process of an aluminum-based grinding wheel, which comprises the following steps:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product;

s6: and machining the semi-finished product to obtain a finished product.

The mixing time of the abrasive and the bonding agent in the step 1 is 1.5 h. The abrasive is diamond. The binding agent is the combination of cobalt powder, iron powder and silver powder. The sintering temperature is 900 ℃ and the sintering time is 1.5 h. The pressing pressure was 100T. And 2, the die is a heat-resistant steel die. And 3, the processing mode is electromachining.

Example 2

The invention provides a preparation process of an aluminum-based grinding wheel, which comprises the following steps:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product;

s6: and machining the semi-finished product to obtain a finished product.

The mixing time of the abrasive and the bonding agent in the step 1 is 1.0 h. The abrasive is diamond. The binding agent is the combination of silver powder, tin powder and nickel powder. The sintering temperature is 1000 ℃ and the sintering time is 1.0 h. The pressing pressure was 90T. And 2, the die is a heat-resistant steel die. And 3, the processing mode is electromachining.

Example 3

The invention provides a preparation process of an aluminum-based grinding wheel, which comprises the following steps:

s1: mixing the abrasive and the bonding agent;

s2: putting the mixed abrasive and the bonding agent into a die, and sintering and pressing to obtain an abrasive ring;

s3: machining the inner diameter and end face of the abrasive ring;

s4: machining the aluminum substrate according to the size of the abrasive ring;

s5: bonding the aluminum substrate and the abrasive ring to obtain a semi-finished product;

s6: and machining the semi-finished product to obtain a finished product.

The mixing time of the abrasive and the bonding agent in the step 1 is 0.5 h. The abrasive is CBN. The bonding agent is a combination of cobalt powder, copper powder and tin powder. The sintering temperature is 800 ℃ and the sintering time is 1.5 h. The pressing pressure was 70T. And 2, the die is a heat-resistant steel die. And 3, the processing mode is electromachining.

Example 4

The invention also provides a grinding wheel, which comprises a grinding ring and an aluminum matrix; the abrasive ring is disposed on the aluminum substrate outer ring.

The aluminum substrate raw material is 7-series aviation aluminum.

Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.