A composite internal grinding wheel structure

Abstract

The utility model proposes a composite internal grinding wheel structure, comprising: a grinding tool rod, comprising a first diameter section and a second diameter section coaxially connected together, the outer diameters of the first diameter section and the second diameter section are not equal; a first grinding tool, arranged on the first diameter section, for grinding a first position of a workpiece; a second grinding tool, arranged on the second diameter section, for grinding a second position of the workpiece, and the second grinding tool and the first grinding tool are made of different materials. The utility model coaxially arranges two grinding tools of different materials on the grinding tool rod, and the materials at the two positions of the workpiece are different. After grinding with different grinding tools, the harder grinding tool can make the surface quality of the workpiece meet the requirements, and the softer grinding tool can avoid excessive wear or damage to the workpiece surface, reduce adhesion to the workpiece, and at the same time reduce the grinding tool replacement time, reduce downtime, and thus save costs.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a composite internal grinding wheel structure. Background Art

[0002] like Figure 1 As shown, some workpieces, such as the gear sleeve 1, have a through hole, and a bushing 2 is installed at one end of the through hole. The inner wall of the bushing 2 and the inner wall of the end of the gear sleeve 1 without the bushing need to be polished, the former is recorded as the first position, and the latter is recorded as the second position. The bushing and the gear sleeve 1 are made of different materials and hardnesses, one is a heat-treated quenched part, and the other is a quenched and tempered part.

[0003] In the prior art, the first position and the second position are ground using a grinding tool having a grinding wheel.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: Grinding wheel adhesion occurs when the above-mentioned grinding tool is used to grind a workpiece. Grinding wheel adhesion refers to the phenomenon that the workpiece material is transferred to the surface of the grinding wheel during the grinding process, and the surface morphology of the grinding wheel is changed. The adhesion phenomenon deteriorates the grinding performance of the grinding wheel. In the production process, in order to restore the grinding performance of the grinding wheel, it needs to be frequently trimmed, which increases the grinding downtime and reduces the production efficiency. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] Therefore, the purpose of the utility model is to provide a composite internal grinding wheel structure to reduce the grinding wheel loss rate and improve the workpiece production efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a composite internal grinding wheel structure, comprising:

[0008] The mold rod comprises a first diameter section and a second diameter section coaxially connected together, wherein the first diameter section and the second diameter section have unequal outer diameters;

[0009] a first grinding tool, disposed on the first diameter section, for grinding a first position of a workpiece;

[0010] The second grinding tool is arranged on the second diameter section and is used for grinding the second position of the workpiece. The second grinding tool and the first grinding tool are made of different materials.

[0011] According to the composite internal grinding wheel structure of the utility model, two grinding tools of different materials are coaxially arranged on the grinding tool rod. The materials of the workpiece at two positions are different. After grinding with different grinding tools, the harder grinding tool can make the surface quality of the workpiece meet the requirements, and the softer grinding tool can avoid excessive wear or damage to the workpiece surface and reduce adhesion to the workpiece. At the same time, the grinding tool replacement time is reduced, the downtime is reduced, and the cost is saved.

[0012] According to an embodiment of the utility model, the mold rod further includes a third diameter section, the third diameter section is coaxially and integrally formed with the second diameter section, and two clamping surfaces are provided on the third diameter section.

[0013] According to an embodiment of the present invention, the first grinding tool and the second grinding tool are both cylindrical, and the first grinding tool and the second grinding tool are parallel to each other.

[0014] According to an embodiment of the present invention, one end of the second grinding tool away from the first grinding tool is in contact with the end surface of the third diameter section.

[0015] According to an embodiment of the present invention, the end surface of the first end of the mold rod is flush with the end surface of the first mold.

[0016] According to an embodiment of the present invention, the first grinding tool and the second grinding tool have different thicknesses in the axial direction.

[0017] According to an embodiment of the utility model, the second end of the mold rod is provided with a connecting portion, and the connecting portion is used to connect to a spindle of a machine tool.

[0018] According to an embodiment of the present invention, the connecting portion has an external thread.

[0019] According to an embodiment of the present invention, it further comprises an auxiliary shaft, wherein the auxiliary shaft is coaxially arranged between the connecting portion and the third diameter section.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0022] Figure 1 It is a structural diagram of the gear sleeve.

[0023] Figure 2 The utility model is a schematic structural diagram of a composite internal grinding wheel structure proposed in one embodiment.

[0024] Figure 3 It is a structural schematic diagram of another perspective of the composite internal grinding wheel structure proposed in one embodiment of the utility model.

[0025] Figure 4 It is a structural schematic diagram of a grinding tool rod of a composite internal grinding wheel structure in one embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1-gear sleeve, 2-bushing, 3-first grinding tool, 4-second grinding tool, 5-grinding tool rod, 6-clamping surface, 7-auxiliary shaft, 8-connecting part, 51-first diameter section, 52-second diameter section, 53-third diameter section. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0029] Figure 1 It is a schematic diagram of the structure of the gear sleeve. The gear sleeve 1 has a through hole, and a bushing 2 is installed at one end of the through hole. The inner wall of the bushing 2 and the inner wall of the end of the gear sleeve 1 without a bushing need to be polished, the former is recorded as the first position, and the latter is recorded as the second position. The bushing and the gear sleeve 1 are made of different materials and hardnesses, one is a heat-treated quenched part, and the other is a tempered part. The workpiece in the utility model is explained by taking the gear sleeve as an example, and the solution of the utility model can also be used for other types of workpieces.

[0030] Combination Figures 2 to 4 As shown, an embodiment of the utility model provides a composite internal grinding wheel structure, including a grinding tool rod 5, a first grinding tool 3 and a second grinding tool 4. The grinding tool rod 5 includes a first diameter section 51 and a second diameter section 52 coaxially connected together, and the outer diameters of the first diameter section 51 and the second diameter section 52 are not equal. The first grinding tool 3 is arranged on the first diameter section 51, and is used to grind the first position of the workpiece. The second grinding tool 4 is arranged on the second diameter section 52, and is used to grind the second position of the workpiece. The second grinding tool 4 and the first grinding tool 3 are made of different materials, and the shape is set according to actual needs. The second grinding tool 4 and the first grinding tool 3 can be connected to the grinding tool rod 5 by sintering, detachable connection, etc.

[0031] The tool rod 5 plays a supporting and fixing role, and is used to install and fix the first tool 3 and the second tool 4, so that they remain stable under high-speed rotation to prevent swinging or falling off. One end of the tool rod 5 is connected to the power source on the machine tool, and the rotational power of the power source is transmitted to the tool to complete the grinding operation. The first tool 3 and the second tool 4 can be made of materials such as grinding wheels, cubic boron nitride (CBN), diamonds, etc., and the specific materials are selected according to actual needs. The first diameter section 51 and the second diameter section 52 are connected in a detachable or integrally formed manner. The different outer diameters of the first diameter section 51 and the second diameter section 52 can form a shoulder, which is used to position the first tool 3 installed on the first diameter section 51. The shoulders of different heights can limit the movement or movement trend of the first tool 3 along the axial direction, and effectively prevent the first tool 3 from slipping during work.

[0032] When the composite internal grinding wheel structure of the utility model is in use, one end of the grinding tool rod 5 is connected to the machine tool, the bushing 2 is rotated, and the grinding tool rod 5 is moved axially into the inner hole of the bushing 2. The first grinding tool 3 first grinds the second position. After the second position is ground, the grinding tool rod 5 continues to move axially, and the second grinding tool 4 grinds the first position again. After the first position is ground, the grinding tool rod 5 is retracted.

[0033] According to the composite internal cylindrical grinding wheel structure of the embodiment of the utility model, two grinding tools of different materials are coaxially arranged on the grinding tool rod. The materials at two positions of the workpiece are different. After grinding with different grinding tools, the harder grinding tool can make the surface quality of the workpiece meet the requirements, and the softer grinding tool can avoid excessive wear or damage to the workpiece surface and reduce adhesion to the workpiece. At the same time, the time for changing the grinding tool is reduced, the downtime is reduced, and the cost is saved.

[0034] In some embodiments, in combination Figures 2 to 4 As shown, the mold rod 5 also includes a third diameter section 53, which is coaxially integrally formed with the second diameter section 52, and two clamping surfaces 6 are provided on the third diameter section 53. The end of the second mold 4 away from the first mold 3 contacts the end surface of the third diameter section 53. The different outer diameters of the third diameter section 53 and the second diameter section 52 can form a shoulder, which can limit the movement or movement trend of the second mold 4 along the axial direction, and effectively prevent the second mold 4 from slipping during work. The size of the clamping surface 6 is set according to actual needs. The clamping surface can be used to clamp the mold rod 5 with pliers or other clamping tools, which can better apply torque and position adjustment.

[0035] In addition, the first grinding tool 3 and the second grinding tool 4 are both cylindrical, highly adaptable, and can apply uniform grinding force to the workpiece to achieve high-quality grinding effect. The first grinding tool 3 and the second grinding tool 4 are parallel to each other, and can maintain consistency of parallelism at two processing positions of the workpiece, thereby improving processing accuracy.

[0036] In some embodiments, in combination Figures 2 to 4 As shown, the end surface of the first end of the mold rod 5 is flush with the end surface of the first mold 3, which helps to maintain the balance of the first mold 3 and reduce vibration under high-speed rotation. Flush installation can also prevent the first mold 3 from flying out during operation, reducing safety risks.

[0037] In order to meet the grinding requirements of different areas of the first position and the second position, the first grinding tool 3 and the second grinding tool 4 have different thicknesses in the axial direction.

[0038] The second end of the mold rod 5 is provided with a connecting portion 8, which is used to connect to the machine tool spindle. There are many ways to connect the machine tool spindle and the mold rod 5, such as flange connection, threaded connection, hydraulic or pneumatic clamping. Exemplarily, the machine tool spindle and the mold rod 5 are connected by threads, the connecting portion 8 has an external thread, and the machine tool spindle has a corresponding internal thread. The threaded connection can provide a reliable fixing effect, as well as good connection stability and durability.

[0039] In addition, the composite internal grinding wheel structure further includes an auxiliary shaft 7, which is coaxially arranged between the connecting portion 8 and the third diameter section 53. The outer diameter of the auxiliary shaft 7 is smaller than the outer diameter of the third diameter section 53. The auxiliary shaft 7 can help the gear sleeve 1 to align correctly or guide the tool movement.

[0040] The composite internal grinding wheel structure of the utility model can configure different speeds and feeds for each grinding tool when processing a workpiece, so as to ensure the quality of the workpiece and further extend the service life of the grinding tool. The composite internal grinding wheel structure of the utility model is suitable for the same workpiece with two inner holes of different materials or the same workpiece with two inner holes of different hardness (such as one hole is high-frequency quenched and the other hole is not high-frequency quenched).

[0041] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0045] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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.

[0047] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A composite internal grinding wheel structure, characterized in that: include: A mold rod (5) comprising a first diameter section (51) and a second diameter section (52) coaxially connected together, wherein the outer diameters of the first diameter section (51) and the second diameter section (52) are unequal; A first grinding tool (3), arranged on the first diameter section (51), for grinding a first position of a workpiece; The second grinding tool (4) is arranged on the second diameter section (52) and is used for grinding the second position of the workpiece. The second grinding tool (4) and the first grinding tool (3) are made of different materials.

2. The composite internal grinding wheel structure according to claim 1, characterized in that: The mold rod (5) further comprises a third diameter section (53), the third diameter section (53) being coaxially integrally formed with the second diameter section (52), and two clamping surfaces (6) being provided on the third diameter section (53).

3. The composite internal grinding wheel structure according to claim 1, characterized in that: The first grinding tool (3) and the second grinding tool (4) are both cylindrical, and the first grinding tool (3) and the second grinding tool (4) are parallel to each other.

4. The composite internal grinding wheel structure according to claim 2, characterized in that: One end of the second grinding tool (4) away from the first grinding tool (3) contacts the end surface of the third diameter section (53).

5. The composite internal grinding wheel structure according to claim 2, characterized in that: The end surface of the first end of the mold rod (5) is flush with the end surface of the first mold (3).

6. The composite internal grinding wheel structure according to claim 1, characterized in that: The first grinding tool (3) and the second grinding tool (4) have different thicknesses in the axial direction.

7. The composite internal grinding wheel structure according to claim 5, characterized in that: The second end of the mold rod (5) is provided with a connecting portion (8), and the connecting portion (8) is used to connect to a main shaft of a machine tool.

8. The composite internal grinding wheel structure according to claim 7, characterized in that: The connecting portion (8) has an external thread.

9. The composite internal grinding wheel structure according to claim 8, characterized in that: It also comprises an auxiliary shaft (7), wherein the auxiliary shaft (7) is coaxially arranged between the connecting portion (8) and the third diameter section (53).

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