Internal grinding CBN (Cubic Boron Nitride) grinding wheel

Abstract

The utility model discloses an internal grinding CBN (Cubic Boron Nitride) grinding wheel which comprises a CBN grinding wheel main body and a connecting shaft, according to the CBN grinding wheel, the retention barrels and the limiting disc are adopted, during operation, cooling liquid is pumped into the CBN grinding wheel body through the cooling liquid pipe, the pumped cooling liquid can enter the retention barrels at the moment and flow along the circulation grooves in the retention barrels, and due to the fact that the multiple sets of retention barrels are arranged and sleeved together in the vertical direction, the CBN grinding wheel can be used for machining the CBN grinding wheel. According to the grinding wheel storage device, the storage barrels are arranged between the grinding wheels, the limiting discs are arranged on the surfaces of the storage barrels in a staggered mode, so that the moving path of cooling liquid can be lengthened, the storage time of the cooling liquid is prolonged, and the cooling liquid can fully absorb heat generated during operation of the grinding wheel; therefore, the cooling liquid can be fully distributed in the grinding wheel, the contact area with heat is increased, and the grinding wheel has the advantages of being good in cooling effect, long in cooling time and wide in cooling area.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding wheels, in particular to an internal grinding CBN grinding wheel. Background Art

[0002] Internal grinding is an important method for finishing the inner hole of the workpiece. It can process through holes, blind holes, step holes, tapered holes, etc. The dimensional accuracy of the grinding holes can reach within 5μm, and the surface roughness is Ra0.025~Ra0.8. Due to its particularity, internal grinding has high technical requirements for grinding wheels. For example, the grinding wheel must have good self-sharpening properties to prevent chips from sticking, good dimensional stability to ensure processing form and position tolerances (roundness, cylindricity, etc.), etc. Therefore, CBN grinding wheels are used. CBN grinding wheels use CBN (cubic boron nitride) abrasives as raw materials, and use metal powder, resin powder, ceramics and electroplated metal as binders to make products of various shapes. The tools used for grinding, polishing and grinding are called CBN abrasives. CBN has more advantages than diamond grinding wheels in processing ferrous metals.

[0003] The publication number in the existing public technology is: CN211760297U. A CBN grinding wheel mechanism for grinding ship parts includes: a base body, a mounting hole at the center of the base body, a hollow base body, a drainage hole at the circumferential edge, and a plurality of water inlet holes on the inner wall of the mounting hole; the water inlet hole, the hollow area inside the base body and the drainage hole form a channel for the circulation of the coolant; the CBN layer is fixed on the circumference of the base body by a binder; the grinding wheel shaft is installed in the mounting hole and connected to the driving member; the grinding wheel shaft is hollow inside, and the connection between the grinding wheel shaft and the mounting hole has a coolant output hole aligned with the water inlet hole, and a coolant input hole arranged along the circumference is provided at one place on the circumference of the grinding wheel shaft; the infusion joint is sleeved on the circumference of the grinding wheel shaft. The beneficial effects of the utility model are: the coolant can be transported to the inside of the grinding wheel through the liquid inlet channel of the grinding wheel shaft, the grinding wheel is cooled from the inside of the grinding wheel, the centrifugal force of the rotation of the grinding wheel is used to accelerate the diffusion of the coolant, the cooling effect is good, and the thermal deformation of the grinding wheel body is reduced.

[0004] However, the above patent still has certain disadvantages when used: it cools the grinding wheel by periodically introducing coolant. Due to the discontinuous cooling and the narrow and relatively flat through-hole of the water inlet, the coolant retention time is short, the utilization amount is insufficient, and the generated heat cannot be fully absorbed, thereby affecting the overall cooling effect.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the utility model provides a CBN grinding wheel for internal grinding, which has the advantages of good cooling effect, long cooling time and wide cooling area, thereby solving the problems in the above-mentioned background technology.

[0008] (II) Technical solution

[0009] In order to achieve the above advantages of good cooling effect, long cooling time and wide cooling area, the specific technical solutions adopted by the utility model are as follows:

[0010] A CBN grinding wheel for internal cylindrical grinding comprises a CBN grinding wheel body and a connecting shaft, wherein a connecting shaft is welded to a middle position on the top of the CBN grinding wheel body, an adjusting disk is rotatably connected to the middle position on the top of the connecting shaft, a coolant pipe is installed through the surface of the adjusting disk, and the bottom end of the coolant pipe is located in the middle position inside the CBN grinding wheel body, a plurality of groups of retention tubes are staggeredly installed up and down inside the CBN grinding wheel body, a plurality of groups of limiting disks are staggeredly installed on the surface between the two retention tubes, a flow groove is opened between the limiting disk and the retention tube at a position inside the CBN grinding wheel body, and a plurality of groups of drainage ports are evenly opened around the top surface of the CBN grinding wheel body.

[0011] Furthermore, a transmission tooth is welded around the middle of the surface of the connecting shaft.

[0012] Furthermore, a limiting groove is arranged around the top position of the surface of the connecting shaft, and a fixing ring is rotatably connected to the inner position of the limiting groove.

[0013] Furthermore, channels for installing coolant pipes are provided inside the CBN grinding wheel body, inside the connecting shaft and inside the fixing ring.

[0014] Furthermore, the transmission teeth are connected to an external driving member.

[0015] Furthermore, the coolant pipe is connected to an external coolant pump.

[0016] Furthermore, the transmission teeth are made of metal material.

[0017] Furthermore, a flow hole is opened inside the coolant pipe.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a CBN grinding wheel for internal grinding, which has the following beneficial effects:

[0020] (1) The utility model adopts a retention tube and a limit plate. During operation, coolant is pumped into the CBN grinding wheel body through the coolant pipe. At this time, the pumped coolant can enter the retention tube and flow along the flow groove inside the retention tube. Since the retention tubes are provided with multiple groups and are arranged together up and down, and limit plates are provided on the surface positions between each other, and the limit plates are staggered, the movement path of the coolant can be lengthened, thereby extending the retention time of the coolant, so that the coolant can fully absorb the heat generated by the operation of the grinding wheel. At the same time, the retention tube and the grinding wheel are concentric circles that surround each other, so the coolant can be fully distributed inside the grinding wheel, increasing the contact area with the heat, thereby improving the overall cooling effect. It has the advantages of good cooling effect, long cooling time and wide cooling area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of an internal grinding CBN grinding wheel proposed by the utility model;

[0023] Figure 2 It is a schematic diagram of the internal structure of the CBN grinding wheel body of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the retention tube and the limiting disk of the utility model;

[0025] Figure 4 It is a connection schematic diagram of the adjusting disk and the connecting shaft of the utility model.

[0026] In the figure:

[0027] 1. CBN grinding wheel body; 2. Retention tube; 3. Limiting plate; 4. Circulation groove; 5. Circulation hole; 6. Drain port; 7. Connecting shaft; 8. Transmission gear; 9. Fixed ring; 10. Adjusting plate; 11. Coolant pipe; 12. Limiting groove. DETAILED DESCRIPTION

[0028] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] According to an embodiment of the utility model, a CBN grinding wheel for internal grinding is provided.

[0030] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4 As shown, according to an embodiment of the utility model, an internal cylindrical grinding CBN grinding wheel comprises a CBN grinding wheel body 1 and a connecting shaft 7, a connecting shaft 7 is welded at the middle position on the top of the CBN grinding wheel body 1, an adjusting disk 10 is rotatably connected at the middle position on the top of the connecting shaft 7, a coolant pipe 11 is installed through the surface of the adjusting disk 10, and the bottom end of the coolant pipe 11 is located at the middle position inside the CBN grinding wheel body 1, a plurality of groups of retention tubes 2 are staggeredly installed up and down inside the CBN grinding wheel body 1, a plurality of groups of limiting disks 3 are staggeredly installed on the surface between the two retention tubes 2, a flow groove 4 is opened between the limiting disk 3 and the retention tube 2 at the inner position of the CBN grinding wheel body 1, a plurality of groups of drainage ports 6 are evenly opened around the top surface of the CBN grinding wheel body 1, the drainage port 6 is provided to discharge the used coolant in time, and the drainage port 6 is provided in the outermost area, which can effectively ensure that the used coolant flows out.

[0031] In one embodiment, a transmission tooth 8 is welded around the middle of the surface of the connecting shaft 7. The transmission tooth 8 is a tooth structure that can mesh with an external driving component to achieve a driving operation.

[0032] In one embodiment, a limiting groove 12 is provided around the top position of the surface of the connecting shaft 7, and a fixing ring 9 is rotatably connected to the inner position of the limiting groove 12. The fixing ring 9 is provided to connect and fix the connecting shaft 7, so as to facilitate subsequent driving components to drive the connecting shaft 7, thereby realizing the grinding operation of the CBN grinding wheel body 1 on the workpiece.

[0033] In one embodiment, channels for installing the coolant pipe 11 are provided inside the CBN grinding wheel body 1 , inside the connecting shaft 7 , and inside the fixing ring 9 . The provision of the channels ensures the installation and use of the coolant pipe 11 .

[0034] In one embodiment, the transmission tooth 8 is connected to an external driving member, which is configured to drive the transmission tooth 8 and the connecting shaft 7. The external driving member can be composed of a driving device such as a motor, and the specific equipment can be adjusted according to personnel needs.

[0035] In one embodiment, the coolant pipe 11 is connected to an external coolant pump. The coolant pump is connected to pump coolant into the CBN grinding wheel body 1, thereby improving the use effect.

[0036] In one embodiment, the transmission tooth 8 is made of metal material, which ensures the strength of the transmission tooth 8 and prevents it from cracking under the drive of an external driving component, thereby improving the use effect and ensuring that the connecting shaft 7 can be driven to realize the rotation of the CBN grinding wheel.

[0037] In one embodiment, a flow hole 5 is provided inside the coolant pipe 11 . The provision of the flow hole 5 facilitates the flow of the coolant.

[0038] Working principle: In actual use, personnel can fix the connecting shaft 7 and the CBN grinding wheel body 1 through the fixing ring 9, and then connect with the external driving member, such as a motor, through the transmission tooth 8, so that the CBN grinding wheel body 1 can be rotated when grinding the inner circle of the workpiece in the future, thereby realizing the grinding operation, and after the structure is installed, the coolant pipe 11 can be connected to the external coolant pumping equipment, so that coolant can be pumped into the CBN grinding wheel body 1 through the coolant pipe 11 in the subsequent use, and the pumped coolant can enter the retention tube 2 and flow along the retention tube. 2, because the retention tube 2 is provided with multiple groups and is mutually sleeved up and down, and the surface positions between each other are provided with limit plates 3, and the limit plates 3 are staggered, the moving path of the coolant can be lengthened, thereby extending the retention time of the coolant, so that the coolant can fully absorb the heat generated by the operation of the grinding wheel. At the same time, the retention tube 2 and the grinding wheel are structured in concentric circles, so the coolant can be fully distributed in the interior of the grinding wheel and fill the interior thereof, increasing the contact area with the heat, thereby improving the overall cooling effect. The device as a whole has the advantages of good cooling effect, long cooling time and wide cooling area.

[0039] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; 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, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A CBN grinding wheel for internal grinding, comprising a CBN grinding wheel body (1) and a connecting shaft (7), characterized in that: A connecting shaft (7) is welded at the middle position of the top of the CBN grinding wheel body (1), and an adjusting disk (10) is rotatably connected to the middle position of the top of the connecting shaft (7). A cooling liquid pipe (11) is installed through the surface of the adjusting disk (10), and the bottom end of the cooling liquid pipe (11) is located at the middle position inside the CBN grinding wheel body (1). A plurality of groups of retention tubes (2) are installed in an alternating manner up and down inside the CBN grinding wheel body (1), and a plurality of groups of limiting disks (3) are installed in an alternating manner on the surface between the two retention tubes (2). A flow groove (4) is provided between the limiting disk (3) and the retention tube (2) at a position inside the CBN grinding wheel body (1), and a plurality of groups of drainage ports (6) are evenly arranged around the top surface of the CBN grinding wheel body (1).

2. The internal grinding CBN grinding wheel according to claim 1, characterized in that: A transmission tooth (8) is welded around the middle of the surface of the connecting shaft (7).

3. The internal grinding CBN grinding wheel according to claim 1, characterized in that: A limiting groove (12) is arranged around the top position of the surface of the connecting shaft (7), and a fixing ring (9) is rotatably connected to the inner position of the limiting groove (12).

4. The internal grinding CBN grinding wheel according to claim 1, characterized in that: Channels for installing a coolant pipe (11) are provided inside the CBN grinding wheel body (1), inside the connecting shaft (7) and inside the fixing ring (9).

5. The internal grinding CBN grinding wheel according to claim 2, characterized in that: The transmission teeth (8) are connected to an external driving member.

6. The internal grinding CBN grinding wheel according to claim 1, characterized in that: The coolant pipe (11) is connected to an external coolant pump.

7. The internal grinding CBN grinding wheel according to claim 2, characterized in that: The transmission teeth (8) are made of metal material.

8. The internal grinding CBN grinding wheel according to claim 1, characterized in that: A circulation hole (5) is provided inside the cooling liquid pipe (11).

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