CN216265449U

CN216265449U - Milling and grinding processing equipment and milling and grinding wheel and matrix used by same

Info

Publication number: CN216265449U
Application number: CN202122994228.5U
Authority: CN
Inventors: 高天一
Original assignee: Beijing Daotian Technology R & D Co ltd
Current assignee: Beijing Daotian Technology R & D Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-12
Anticipated expiration: 2031-12-01

Abstract

Aiming at the defects of small flow and poor cooling effect when cooling water flows out through a hollow inner cavity of an output shaft in the prior art, the utility model provides milling and grinding processing equipment and a milling and grinding wheel and a matrix used by the milling and grinding processing equipment; the base body comprises a support ring, a base body core and a circular ring, the base body core is arranged in an inner cavity of the support ring, and a water outlet is formed between the support ring and the base body core; the circular ring is connected to one end of the support ring, a cooling water circulation channel is arranged between the circular ring and the substrate core, and the size of the channel and the size of the water outlet can be large enough, so that the cooling speed and the cooling effect are improved; the milling wheel comprises a material ring and the matrix, wherein the material ring is arranged at one end opposite to the circular ring, and an inner cavity of the material ring is a cooling water circulation channel and can cool a workpiece in the material ring; in the milling and grinding processing equipment, the cooling water jacket is fixed on the shell, the water jacket and the substrate are in a non-contact and non-connection relationship, the water jacket is fixed when the substrate rotates, the rotating speed of the substrate is not influenced by the water jacket, and the milling and grinding processing equipment is suitable for high-speed grinding.

Description

Milling and grinding processing equipment and milling and grinding wheel and matrix used by same

Technical Field

The utility model relates to the technical field of diamond grinding wheels, in particular to milling and grinding processing equipment and a milling and grinding wheel and a matrix used by the milling and grinding processing equipment.

Background

When the milling and grinding of the spherical generating method or the plane machining are carried out, grinding heat can be generated by the high-speed operation of the milling and grinding wheel, the temperatures of the milling and grinding wheel and a workpiece can be increased, and the milling and grinding quality is affected, so that the milling and grinding wheel needs to be cooled by cooling water. In the prior art, cooling is generally performed in the following manner: 1. an output shaft of the milling and grinding wheel is arranged to be of a hollow structure, a cooling water pipe is arranged in a hollow inner cavity of the output shaft, and cooling water enters the milling and grinding wheel and a workpiece through the cooling water pipe. Because condenser tube sets up in the cavity inner chamber of rotation axis, condenser tube is thinner, and discharge is less, consequently, enters into the cooling water that mills on grinding wheel and the work piece less, and the grinding heat that can take away is less, and this kind of structure still can satisfy the low-speed and mill, and the cooling effect is not good to high-speed milling. 2. The rotating shaft is butted with a cooling water pipe through a rotary joint, and cooling water directly enters the hollow inner cavity of the rotating shaft. Although the flow rate of the cooling water is slightly increased, the flow rate of the cooling water is still insufficient to sufficiently carry away the grinding heat, and the rotary joint cannot bear the high-speed operation of the rotary shaft, so that the rotary joint is easily damaged. Among the above-mentioned two kinds of prior art, hollow structure's output shaft processing degree of difficulty is big, and the cost of manufacture is high. 3. The cooling is carried out by adopting an external spraying mode, namely, a water spraying pipe is arranged outside the equipment, and cooling water is sprayed to the milling grinding wheel and the workpiece by the water spraying pipe. However, since the cooling water is sprayed from the outside of the milling wheel, the abrasive layer has a certain blocking effect on the cooling water, particularly in the spherical generating method, the abrasive layer is in a cylindrical shape, the whole end surface of the cylindrical abrasive layer is in contact with a workpiece, and the cooling water sprayed from the outside is almost completely blocked from the outside by the abrasive layer and cannot enter the inside of the abrasive layer, so that the cooling water can only take away the grinding heat outside the abrasive layer, the cooling is insufficient, and the cooling effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that in the prior art, when cooling water flows to a workpiece and a milling and grinding wheel through a hollow inner cavity of an output shaft, the flow rate of the cooling water is small, the cooling effect is poor, the processing difficulty of the output shaft is high, and the manufacturing cost is high; or, when the external spraying type cooling mode is adopted, cooling water cannot enter the grinding material layer, and the heat in the grinding material layer cannot be taken away or cannot be taken away sufficiently, so that the milling and grinding processing equipment and the milling and grinding wheel and the base body used by the milling and grinding processing equipment are provided.

The purpose of the utility model is realized by the following technical scheme:

a grinding wheel matrix comprises a support ring, a matrix core and a circular ring, wherein the support ring is coaxially arranged and used for arranging an abrasive layer, the matrix core is used for connecting an output shaft of a driving device, the circular ring is used for containing cooling water, the matrix core is sleeved in the support ring, the support ring is fixedly connected with the matrix core through a rigid support, a cooling water outlet is formed in the rigid support and/or between the rigid supports, a connecting structure is arranged on the matrix core and used for fixedly connecting with the output shaft of the driving device, one end of the support ring is fixedly connected with one end of the circular ring in a sealing mode, the other end of the circular ring is a free end, and a material layer is arranged at the other end of the support ring;

a connecting handle is arranged at one end of the base core, which is on the same side with the circular ring, the connecting handle is fixedly connected with the base core, the base core and the connecting handle are coaxially arranged, and a connecting structure fixedly connected with an output shaft of the driving device is arranged on the base core and the connecting handle; the water cooling device is characterized by further comprising a cooling water jacket, wherein the cooling water jacket comprises an annular sleeve, a water baffle and a connecting ring, one end of the annular sleeve is open, the other end of the annular sleeve is hermetically connected with the water baffle, the open end of the annular sleeve is movably matched with the circular ring and forms a cooling water circulation channel with the circular ring and an inner cavity of the support ring, the water baffle is an annular plate, the diameter of an inner hole of the water baffle is smaller than the inner diameter of the annular sleeve, and an output shaft of a driving device passes through the inner hole;

an annular step surface is arranged on the outer circumference of the end part of the opening end of the annular sleeve and is positioned inside the circular ring, and the annular step surface is in clearance fit with the circular ring;

a boss is arranged on the surface of at least one side of the water baffle along the circumferential direction of the inner hole;

the rigid support adopts support rods, a plurality of support rods are arranged along the radius direction of the support ring, and the gap between every two adjacent support rods is a water outlet; the free end of the circular ring is used for being connected with the cooling water jacket;

the connecting handle is cylindrical or conical, connecting holes are arranged on the axes of the connecting handle and the base body core and are used as connecting structures fixedly connected with an output shaft of the driving device, and the connecting handle extends out of the circular ring and is positioned in the annular sleeve;

the inner and outer diameters of the circular ring are equal to the inner and outer diameters of the supporting ring;

a milling and grinding wheel comprises a material ring and the base body as described in any of the items 1-7, wherein the material ring is arranged at one end of a support ring opposite to an arranged circular ring, the material ring and the support ring are coaxially arranged, and the inner diameter of the material ring is adapted to that of the support ring;

a milling and grinding processing device comprises a driving device, a shell and the milling and grinding wheel, wherein an output shaft of the driving device and a base body are coaxially arranged and fixedly connected with the output shaft through a connecting structure, and a cooling water jacket is fixedly connected with the shell through a connecting plate;

the connecting structure is a connecting hole arranged along the axis of the base body core or the base body core and the connecting handle, the connecting hole is internally provided with a fastening screw to connect the output shaft and the base body core, the output shaft penetrates through an inner hole arranged on the water baffle and is in clearance fit with the inner hole of the water baffle, a shaft shoulder is arranged on the output shaft corresponding to the position of the water baffle, the shaft shoulder is opposite to the end face of the water baffle and is in clearance fit with the end face of the water baffle, the fit clearance is less than or equal to 0.05mm, the diameter of the inner hole of the water baffle is less than the diameter of the shaft shoulder of the output shaft of the milling and grinding wheel, the water baffle is in clearance fit with the output shaft, the fit clearance is less than or equal to 0.05mm, and the fit clearance is not greater than or not interfered with each other or is not rubbed.

The grinding wheel matrix provided by the utility model comprises a support ring, a matrix core and a circular ring which are coaxially arranged, wherein the matrix core is arranged in an inner cavity of the support ring, the support ring is connected with the matrix core through rigid supports, a water outlet for spraying cooling water is arranged on the rigid supports and/or between the rigid supports, and a large-size water outlet can be arranged due to the fact that enough space can be provided on the rigid supports or between the rigid supports; the ring sets up the one end at the support ring, with support ring sealing connection, be the cavity between ring and the base member core, this cavity is as the circulation passageway of cooling water, and the cooling water is from this passageway flow direction delivery port to spout to the work piece by the delivery port, because the size of cavity and delivery port between ring and the base member core can be big enough, consequently satisfied the supply volume of cooling water, can carry out abundant cooling to the work piece, improve the cooling rate and the cooling effect of work piece.

Furthermore, a cooling water jacket is arranged at one end close to the ring, the opening end of the cooling water jacket is in movable fit with the end part of the ring, and a water baffle is arranged at the other end of the cooling water jacket, so that the inner cavity of the ring is communicated with the inner cavity of the cooling water jacket to form a cooling water channel with one end relatively closed, the water baffle prevents cooling water from reversely flowing out.

The milling and grinding wheel comprises a material ring and the base body, wherein the material ring is arranged at one end opposite to the circular ring, the material ring is used as a grinding material layer, the end part of the material ring is fixedly connected with the end part of the support ring, and the inner diameter of the material ring is matched with that of the support ring; in the spherical generating method processing, the inside and the outside of an abrasive layer can be simultaneously cooled, namely, the milling and grinding wheel provided by the utility model is adopted to cool the workpiece inside the material ring, and the external workpiece outside the material ring is cooled by adopting an external spraying type cooling method, so that the cooling effect is improved, the high-speed grinding is realized, the grinding linear velocity can reach 62M/S, and the processing efficiency is improved by more than 50%.

By adopting the milling and grinding processing equipment provided by the utility model, the driving device is arranged in the shell, the cooling water jacket is fixed on the shell through the connecting plate, the connection is convenient, the operation is simple, the labor time is saved, the labor efficiency is improved, meanwhile, the shell provides support for the cooling water jacket, and the water jacket and the substrate are in a non-contact and non-connection position relationship, so that when the substrate rotates, the water jacket is fixed, the rotating speed of the substrate is not influenced by the water jacket, and the milling and grinding processing equipment is suitable for high-speed grinding.

The grinding wheel and the cooling water jacket adopting the structure of the utility model are particularly suitable for the grinding working condition that the rotating speed is more than 10000RPM and needs internal cooling.

Drawings

FIG. 1 is a schematic front view cross-sectional view of a milling apparatus of the present invention;

FIG. 2 is a schematic left side view of a substrate according to the present invention;

FIG. 3 is a schematic front sectional view of a cooling water jacket according to the present invention;

fig. 4 is a schematic front view, cross-sectional view of another embodiment of the milling apparatus of the present invention.

Description of the reference numerals

1. A substrate; 11. a support ring; 12. a rigid support, 13, a substrate core; 14. connecting holes; 15. a circular ring; 16. a water outlet; 17-a connecting handle; 2. a cooling water jacket; 21. an annular sleeve; 22. a water baffle; 221. a boss; 23. a connecting plate; 24. a connecting bolt; 25. a step surface; 26. a water inlet hole; 27. an inner bore; 28. a vertical plane; 3. a water inlet pipe; 4. a drive device; 41. an output shaft; 411. a shaft shoulder; 42. a housing; 5. material ring; 6. tightening the bolt; 7. a cooling water passage.

Detailed Description

The utility model is further described below with reference to specific examples:

as shown in fig. 1-3, the present invention provides a grinding wheel base, which comprises a support ring 11 for supporting an abrasive layer, a base core 13 for connecting an output shaft, and a ring 15 for containing cooling water, wherein the support ring 11, the base core 13, and the ring 15 are coaxially arranged, the inner diameters of the support ring and the ring are larger than the outer diameter of the base core 13, the support ring 11 is arranged outside the base core 13, the support ring 11 and the base core 13 are fixedly connected through a rigid support 12, the rigid support 12 can be a support rod or a support plate, when the support rods are used, each support rod is arranged along the radial direction of the support ring, preferably uniformly distributed, a plurality of support rods can be used, a gap is arranged between adjacent support rods, the gap is used as a cooling water outlet, preferably three support rods are arranged, and the three support rods are uniformly distributed and respectively fixedly connected with the inner circumferential wall of the support ring and the outer circumferential wall of the base core, forming a Y-shaped structure; when the supporting plate is adopted, the supporting plate and the supporting plate are coaxially arranged, a Y-shaped supporting structure with the same structure as the supporting rod can be adopted, meanwhile, on the premise of ensuring the strength, a through hole can be opened in the supporting plate, a gap between the through hole and the supporting plate is adopted as a water outlet of cooling water, or the supporting plate is a complete annular plate, and the through hole is formed in the supporting plate as the water outlet. One end of the circular ring 15 is fixedly connected with the support ring 11 in a sealing way or is arranged integrally, and the other end of the circular ring is a free end. The length of the substrate core can be smaller than the sum of the lengths of the circular ring and the support ring, the full length of the substrate core is sleeved in the circular ring 15 and the support ring, and can also be smaller than the length of the support ring, and the full length of the substrate core is only sleeved in the support ring. Preferably, the inner and outer diameters of the ring 15 are equal to those of the support ring 11, and the ring is integrally connected with the support ring, the inner diameter of the ring is larger than the outer diameter of the substrate core, and a cavity structure is formed between the ring and the substrate core. Set up connection structure on the base member core as the connection structure with the output shaft of driver, through connection structure and output shaft connection, connection structure can be the connecting hole that sets up on base member dabber line, also can be centre of a circle line and a plurality of connecting holes of base member dabber line coaxial, sets up connection structure like this and is favorable to the stability of base member 1, reduces the runout of support ring 11, improves the stability on abrasive material layer, and then improves the smoothness degree of milling the mill grinding face. Preferably, a through hole is provided in the axial direction of the core of the base body as a connection hole 14 for installing the fastening bolt 6. The end of the support ring opposite to the end connected to the ring is used for arranging the material layer, namely the material layer end, and preferably, the end surfaces of the substrate core and the rigid support are both positioned inside the end surface of the material layer end of the support ring. For the purpose of description, the end of the base core outside the support ring is provided with a connecting shank 17, which is arranged coaxially with the base core, the connecting shank 17 being conical or cylindrical and preferably having a length such that it extends outside the ring, which facilitates the connection with the connecting shaft of the driver and provides installation space for the cooling jacket.

The cooling water jacket 2 is arranged adjacent to the free end of the circular ring 15, and the cooling water jacket 2 comprises an annular sleeve 21 and a connecting plate 23. One end of the annular sleeve 21 is provided with a water baffle 22, the other end is an open end, the water baffle 22 is annular and is arranged in the annular sleeve, the outer circumference of the water baffle is hermetically connected with the inner circumferential surface of the annular sleeve 21, an inner hole 27 of the water baffle is used for penetrating an output shaft, the inner hole 27 is in clearance fit with the output shaft, the water baffle is in clearance fit with a shaft shoulder 411 of the output shaft, and since cooling water can overflow from the clearance, an annular boss 221 is arranged on at least one side of the circumferential direction of the inner hole 27, and the annular boss 221 can lengthen the matching surface of the water baffle and the output shaft, thereby slowing down the overflow of the cooling water. The open end of the annular sleeve is movably matched with the free end of the annular ring 15, so that the inner cavity of the annular ring is communicated with the inner cavity of the cooling water jacket to form a cooling water channel 7 for cooling water to pass through. The outer diameter of the annular sleeve 21 may be larger than the inner diameter of the ring or smaller than the inner diameter of the ring, and when the outer diameter of the annular sleeve 21 is smaller than the inner diameter of the ring, the open end of the annular sleeve 21 is inserted into the ring 15, or vice versa, but the annular sleeve and the ring are in clearance fit and do not contact with each other. Since the cooling water overflows from the gap between the annular sleeve and the circular ring, preferably, the outer diameter of the annular sleeve 21 is larger than the inner diameter of the circular ring, an annular step surface 25 is arranged on the outer circumference of the opening end of the annular sleeve 21, the diameter of the annular step surface 25 is slightly smaller than the inner diameter of the circular ring 15, the step surface 25 is inserted into the inner cavity of the circular ring to be in clearance fit with the circular ring, so that a vertical surface 28 between the outer circumference of the annular sleeve 21 and the step surface 25 is in clearance fit with the end surface of the circular ring, and the vertical surface 28 can play a role in blocking the overflow of the cooling water and reducing or preventing the overflow of the cooling water. Preferably, the fit clearance between the bottom surface (25) of the annular step and the circular ring of the grinding wheel matrix is less than or equal to 0.05mm, and the bottom surface and the circular ring are not interfered or rubbed with each other.

At least one inlet opening 26 for cooling water is provided in the circumferential wall of the annular sleeve 21. Set up inlet tube 3 between cooling water source and the annular cover, the one end and the inlet opening 26 intercommunication of inlet tube, the other end and cooling water source intercommunication, cooling water enters into in the cooling water passageway 7 through inlet tube 3. The connecting plate 23 is preferably cylindrical and is disposed coaxially with the annular sleeve, and one end of the connecting plate is fixedly connected to the annular sleeve or the water guard, and the other end is fixedly connected to the apparatus main body by a connecting bolt 24, thereby fixing the cooling water jacket 2.

The utility model provides a milling and grinding wheel which comprises a grinding material layer and the base body 1, wherein a material ring 5 is fixedly arranged on one end, opposite to a circular ring 15, of a support ring 11 as the grinding material layer, one end of the material ring 5 is fixedly connected with the end part of the support ring 11, the inner diameter and the outer diameter of the material ring 5 are preferably close to or equal to the inner diameter and the outer diameter of the support ring, and the inner cavity of the material ring is communicated with a water outlet 16.

The utility model provides milling and grinding processing equipment which comprises the milling and grinding wheel and a driving device 4, wherein the driving device 4 is arranged in a shell 42, an output shaft 41 of the driving device is connected with a base body, preferably, a high-speed motor is used as the driving device 4, the shell 42 of the high-speed motor with the high-speed electric main shaft as the output shaft of the high-speed motor is used as a support body for supporting the output shaft 41, the output end of the output shaft 41 penetrates through an inner hole 27 of a water baffle and then is fixedly connected with a base body core 13 through a fastening bolt 6, and the output shaft drives the base body to rotate to drive a material ring to rotate. The connecting plate 23 is fixedly connected to the housing 42 by the connecting bolt 24, thereby fixing the cooling water jacket 2 to the housing of the electric spindle.

The position of the output shaft corresponding to the position of the water baffle is provided with a shaft shoulder, the shaft shoulder of the output shaft is opposite to the end surface of the water baffle, and the end surface of the water baffle (22) is in clearance fit with the end surface of the shaft shoulder of the output shaft. With this structure, the reverse overflow of the cooling water is slowed down and prevented again. The inner hole (27) of the water baffle (22) is smaller than the diameter of the shaft shoulder of the output shaft of the milling and grinding wheel, and the clearance between the inner hole and the end surface of the output shaft is less than or equal to 0.05 mm.

Claims

1. The grinding wheel base body is characterized by comprising a support ring (11) which is coaxially arranged and used for arranging an abrasive layer, a base core (13) which is used for connecting an output shaft of a driving device and a circular ring (15) which is used for containing cooling water, wherein the base core (13) is sleeved in the support ring (11), the support ring (11) is fixedly connected with the base core (13) through a rigid support (12), a cooling water outlet (16) is formed in the rigid support (12) and/or between the rigid supports (12), a connecting structure which is fixedly connected with the output shaft of the driving device is arranged on the base core (13), one end of the support ring (11) is fixedly connected with one end of the circular ring (15) in a sealing mode, the other end of the circular ring is a free end, and the other end of the support ring is provided with a material layer.

2. The grinding wheel basic body of claim 1, characterized in that the end of the basic body core on the same side as the circular ring is provided with a connecting handle (17), the connecting handle (17) is fixedly connected with the basic body core, the basic body core and the connecting handle are coaxially arranged, and a connecting structure fixedly connected with an output shaft of the driving device is arranged on the basic body core and the connecting handle; the cooling water jacket (2) comprises an annular sleeve (21), a water baffle (22) and a connecting plate (23), one end of the annular sleeve (21) is open, the other end of the annular sleeve is hermetically connected with the water baffle (22), the open end of the annular sleeve (21) is movably matched with the ring (15) and forms a cooling water circulation channel with the inner cavities of the ring (15) and the support ring (11), the water baffle (22) is an annular plate, the diameter of an inner hole (27) of the water baffle (22) is smaller than the inner diameter of the annular sleeve and is used for an output shaft of a driving device to pass through, a water inlet hole (26) is formed in the circumferential wall of the annular sleeve (21), the water inlet hole (26) is communicated with the inner cavity of the annular sleeve (21), and one end of the connecting plate (23) is fixedly connected with the annular sleeve (21) or the water baffle (22), the other end of the connecting plate (23) is provided with a connecting structure for connecting with grinding equipment.

3. The grinding wheel body of claim 2, wherein said annular sleeve (21) has an open end portion provided on an outer circumference with an annular step surface (25), said annular step surface (25) being located inside said ring (15), said annular step surface (25) being in clearance fit with said ring (15).

4. The grinding wheel body of claim 2, wherein the dam plate (22) has a projection (221) on at least one side of the surface thereof in the circumferential direction of the bore (27).

5. The grinding wheel matrix according to claim 1, characterized in that the rigid support (12) is a support bar, a plurality of support bars are arranged along the radius direction of the support ring (11), and the gap between adjacent support bars is a water outlet (16); the free end of the circular ring (15) is used for being connected with the cooling water jacket.

6. The grinding wheel body of claim 2, wherein the shank (17) is cylindrical or conical, and the shank (17) and the body core are provided with attachment holes (14) along their axes for attachment to an output shaft of a drive means, the shank extending beyond the ring and being located within the ring housing.

7. The grinding wheel matrix according to claim 1, characterized in that the inner and outer diameters of the ring (15) are equal to the inner and outer diameters of the support ring (11).

8. Milling wheel, characterized in that it comprises a material ring (5) and a basic body (1) according to any one of claims 1-7, the material ring (5) being arranged at the end of the support ring opposite to where the circular ring (15) is arranged, the material ring (5) being arranged coaxially with the support ring, the inner diameter of the material ring (5) corresponding to the inner diameter of the support ring (11).

9. Milling and grinding equipment, characterized by comprising a driving device (4), a shell (42) and the milling and grinding wheel of claim 8, wherein an output shaft (41) of the driving device (4) is coaxially arranged with the base body (1) and is fixedly connected with the output shaft through the connecting structure, and the cooling water jacket (2) is fixedly connected with the shell (42) through a connecting plate (23).

10. A milling and grinding processing device as claimed in claim 9, characterized in that the connecting structure is a connecting hole arranged along the axis of the substrate core or the substrate core and the connecting handle, the output shaft (41) and the substrate core are connected by arranging a set screw (6) in the connecting hole, the output shaft passes through an inner hole arranged on the water baffle and is in clearance fit with the inner hole of the water baffle, a shaft shoulder is arranged on the output shaft corresponding to the position of the water baffle, the shaft shoulder is opposite to the end face of the water baffle and is in clearance fit with the end face of the water baffle, the fit clearance is less than or equal to 0.05mm, the diameter of the inner hole (27) of the water baffle (22) is smaller than that of the shaft shoulder of the milling and grinding wheel output shaft, the water baffle is in clearance fit with the output shaft, the fit clearance is less than or equal to 0.05mm, but does not interfere with or rub with each other.