A grinding device for a machining center

Abstract

A grinding device for a machining center, comprising a spindle taper shank, an end cover, a grinding assembly and a fan; a receiving cavity and a water flow channel are provided in the spindle taper shank, the receiving cavity is located at the bottom of the spindle taper shank, one end of the water flow channel communicates with the receiving cavity, and the other end communicates with the water outlet channel of the spindle of the machining center; the end cover covers the bottom of the receiving cavity, and a plurality of water outlet holes communicating with the receiving cavity are provided on the end cover; the grinding assembly includes a connecting assembly and a grinding piece connected to the bottom of the connecting assembly, one end of the connecting assembly passes through the end cover and extends into the receiving cavity, and the connecting assembly is rotatably connected to the spindle taper shank and / or the end cover, the fan is fixedly connected to the connecting assembly and is located in the receiving cavity, and it rotates under the action of water. Compared with the prior art, the grinding device of the present invention drives the grinding assembly to rotate by water, and at the same time the water is sprayed onto the workbench, improving the service life of the grinding piece and the grinding effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding devices, and particularly relates to a grinding device for a machining center. Background Art

[0002] In a machining center, the function of a grinding device is to remove burrs, floating rust, oil stains, dust, etc. on the surface of a product. Most of the existing grinding devices are pneumatic drive structures. For example, the pneumatic grinding tool for a machine tool disclosed in Publication No. CN112548793A connects a pneumatic grinding machine to a tool holder and uses the air compressor of the machine tool to provide power to the pneumatic grinding machine so that the grinding machine can grind the product. However, this grinding method will greatly consume the sandpaper of the grinding machine, reduce the service life of the sandpaper, and increase the grinding cost. In addition, a large amount of powder will be generated during the grinding process, and the powder is located between the product and the sandpaper. This will not only further consume the sandpaper, reduce the sandpaper life, and increase the grinding cost, but also reduce the surface finish of the product and the grinding effect is poor. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a grinding device for a machining center.

[0004] To achieve the above purpose, the present invention discloses a grinding device for a machining center, including a spindle taper shank, an end cover, a grinding assembly, and a fan;

[0005] A receiving cavity and a water flow channel are provided in the spindle taper shank. The receiving cavity is located at the bottom of the spindle taper shank. One end of the water flow channel communicates with the receiving cavity, and the other end communicates with the water outlet channel of the spindle of the machining center;

[0006] The end cover covers the bottom of the receiving cavity;

[0007] The grinding assembly includes a connecting assembly and a grinding piece connected to the bottom of the connecting assembly. One end of the connecting assembly passes through the end cover and extends into the receiving cavity. The connecting assembly is rotatably connected to the spindle taper shank and / or the end cover. The fan is fixedly connected to the connecting assembly and is located in the receiving cavity, and it rotates under the action of water;

[0008] A plurality of water outlet holes communicating with the receiving cavity are provided on the end cover, or the connecting assembly and the grinding piece are hollow and communicate inside. The space inside the connecting assembly communicates with the receiving cavity, and the bottom of the grinding piece penetrates.

[0009] Preferably, the water outlet holes face the outside of the grinding piece, there are 6 - 10 of them, and the diameter is 8 - 12 mm.

[0010] Preferably, a first bearing mounting groove and a second bearing mounting groove are respectively provided at a position above the accommodation cavity in the spindle taper shank and on the end cap. The central axes of the first bearing mounting groove and the second bearing mounting groove are collinear with the central axis of the spindle taper shank. A first bearing and a second bearing are respectively fixed in the first bearing mounting groove and the second bearing mounting groove, and the connecting assembly is fixed to the inner rings of the first bearing and the second bearing.

[0011] More preferably, the water flow channel includes a first flow channel located on the central axis of the spindle taper shank and arranged vertically, a second flow channel communicated with the bottom end of the first flow channel and arranged horizontally, a third flow channel communicated with the second flow channel and arranged vertically, and a fourth flow channel communicated with the third flow channel and arranged horizontally. The end of the fourth flow channel far from the third flow channel is communicated to the accommodation cavity.

[0012] More preferably, the first flow channel and the fourth flow channel penetrate through the side wall of the spindle taper shank to form through holes, and the through holes are detachably and sealingly connected with plugs.

[0013] More preferably, the spindle taper shank includes a spindle taper shank main body and an accommodation cylinder fixed below the spindle taper shank main body. The water flow channel, the first flow channel and the second flow channel are arranged in the spindle taper shank main body, the accommodation cavity and the fourth flow channel are arranged in the accommodation cylinder, and the third flow channel is formed between the spindle taper shank main body and the accommodation cylinder.

[0014] Preferably, the connecting assembly includes a connecting shaft and an eccentric shaft connected to the bottom of the connecting shaft. The connecting shaft is rotatably connected to the spindle taper shank and / or the end cap and is collinear with the central axis of the spindle taper shank. The central axis of the eccentric shaft is not collinear with the central axis of the connecting shaft, and the grinding member is fixedly connected to the eccentric shaft.

[0015] Preferably, the water outlet hole is detachably connected with a universal nozzle.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] An accommodation cavity and a water flow channel are arranged in the spindle taper shank. The impeller is arranged in the accommodation cavity and fixed to the connecting assembly, and the grinding member is connected to the connecting assembly. In this way, when the spindle taper shank is connected to the spindle of the machining center, the water outlet channel of the machining center inputs high-pressure water into the water flow channel of the spindle taper shank. The high-pressure water drives the impeller to rotate at a high speed. Furthermore, the impeller drives the connecting assembly and the grinding member to rotate at a high speed. Finally, the grinding member can grind the product.

[0018] A water outlet hole is arranged on the end cap. The water outlet hole serves as a drainage structure for discharging the water in the accommodation cavity, which can ensure that the high-pressure water is in a high-speed circulation state and drive the impeller to rotate at a high speed.

[0019] After the water flows out of the water outlet hole, the water is sprayed towards one side of the workbench and splashes onto the product. The dust between the grinding part and the product combines with the water to form mud. Compared with the dust, the mud greatly reduces the wear on the grinding surface (sandpaper) of the grinding part, improves the service life of the grinding surface, reduces the grinding cost, and also reduces the wear on the product, improving the grinding smoothness and effect of the product. In addition, the combination of dust and water into mud facilitates the collection and cleaning of dust, avoiding the problem of inconvenient cleaning caused by dust accumulation and flying, and does not affect the environment and the health of the staff. Description of the Drawings

[0020] Figure 1 is a schematic three-dimensional structure diagram of a grinding device for a machining center according to the present invention;

[0021] Figure 2 is Figure 1 a schematic three-dimensional exploded structure diagram of the grinding device in

[0022] Figure 3 is Figure 1 a schematic three-dimensional sectional view of the grinding device in

[0023] Spindle taper shank 1; Spindle taper shank body 11; First bearing mounting groove 111; Receiving cylinder 12; Receiving cavity 121; First flow channel 131; Second flow channel 132; Third flow channel 133; Fourth flow channel 134; Through hole 14;

[0024] End cover 2; Water outlet hole 21; Second bearing mounting groove 22;

[0025] Grinding assembly 3; Connecting assembly 31; Connecting shaft 311; Eccentric shaft 312; Grinding part 32;

[0026] Blade fan 4;

[0027] First bearing 5;

[0028] Second bearing 6;

[0029] Plug 7;

[0030] Universal nozzle 8. Detailed Embodiments

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] A grinding device for a machining center, see Figures 1 - 3, including a spindle taper shank 1, an end cap 2, a grinding assembly 3 and a fan 4. The spindle taper shank 1 is provided with a receiving cavity 121 and a water flow channel. The receiving cavity 121 is located at the bottom of the spindle taper shank 1. One end of the water flow channel communicates with the receiving cavity 121, and the other end penetrates through to the top of the spindle taper shank 1 for communicating with the water outlet channel of the spindle of the machining center. The end cap 2 covers the bottom of the receiving cavity 121 to block it below the receiving cavity 121. The end cap 2 is provided with a plurality of water outlet holes 21 communicating with the receiving cavity 121, and the receiving cavity 121 communicates with the outside through the water outlet holes 21. The grinding assembly 3 includes a connecting assembly 31 and a grinding member 32 connected to the bottom of the connecting assembly 31. There is a sandpaper at the bottom of the grinding member 32 to grind the product. One end of the connecting assembly 31 passes through the end cap 2 and extends into the receiving cavity 121. The connecting assembly 31 is rotatably connected to the spindle taper shank 1 and / or the end cap 2. The fan 4 is fixedly connected to the connecting assembly 31 and is located in the receiving cavity 121, and it rotates under the action of water.

[0033] When assembling the above grinding device, the spindle taper shank 1 is connected to the spindle of the machining center, and the water flow channel of the spindle taper shank 1 communicates with the water outlet channel of the machining center. When the product needs to be ground, in the first step, the water pump of the machining center inputs high-pressure water into the water flow channel of the spindle taper shank 1 through the water outlet channel. The water flows through the water flow channel to the receiving cavity 121 and finally sprays out through the water outlet holes 21 to the side of the workbench of the machining center. When the high-pressure water flows in the receiving cavity 121, it will flow through the fan 4, thereby driving the fan 4 to rotate at a high speed, and finally driving the connecting assembly 31 and the grinding member 32 to rotate at a high speed. After the fan rotates, it will also compress the water, thereby further improving the water spray pressure and spray effect. In the second step, the grinding member 32 moves towards the product on the workbench until it contacts the product for grinding. During the moving process, the water sprayed out from the water outlet holes 21 will splash onto the surface of the product, which makes the dust between the grinding member 32 and the product combine with water to form mud during the grinding process. Compared with dust, the mud greatly reduces the wear on the grinding surface (sandpaper) of the grinding member 32, improves the service life of the grinding surface, reduces the grinding cost, also reduces the wear on the product and improves the heat dissipation effect, and improves the grinding finish and grinding effect of the product. In addition, the combination of dust and water into mud facilitates the collection and cleaning of dust, avoids the problems of dust accumulation and flying causing inconvenient cleaning, and does not affect the environment and the health of the staff. The above water outlet holes 21, in addition to improving the grinding and later cleaning effects, at the same time, the water outlet holes 21 serve as a drainage structure for the water in the receiving cavity 121 to be discharged, which can ensure that the high-pressure water is in a high-speed flowing state and drive the fan 4 to rotate at a high speed.

[0034] In this application, the water outlet holes 21 face the outside of the grinding member 32. There are 6 to 10 of them, with a diameter of 8 to 12 mm. Such a setting can ensure the water discharge effect, thereby ensuring the flow rate of water in the accommodation cavity 121, further ensuring the rotation speed of the blade fan 4 and the grinding assembly 3, and finally ensuring the grinding effect, avoiding the problem that the total flow area of the water outlet holes 21 is too small, resulting in poor water flow effect in the accommodation cavity 121, low rotation speed of the grinding assembly 3, and poor grinding effect. Since there is a grinding member 32 between the water outlet holes 21 and the product, the water flowing out of the water outlet holes 21 cannot directly flow to the product surface. Therefore, it is not easy for the water to cover the product surface. Therefore, the above design of this embodiment also ensures the pressure of the water flowing out of the water outlet holes 21. Thus, when the water is sprayed onto the workbench, the water can splash onto the product surface, and the dust between the grinding member 32 and the product can combine with the water to form mud, improving the service life of the grinding member 32, the surface finish of the product, and the grinding effect. In addition, it can also clean the mud on the periphery and outside of the grinding member 32, improving the cleaning effect.

[0035] Among them, preferably, in this embodiment, there are 8 water outlet holes 21, with a diameter of 10, and the 8 water outlet holes 21 are evenly distributed.

[0036] As another implementation method, the end cover 2 is not provided with water outlet holes. The connecting component and the inside of the grinding member are hollow and communicate with each other. The space inside the connecting component communicates with the accommodation cavity, and the bottom of the grinding member penetrates, so that water flows out from the center of the bottom of the grinding member. In this way, the mud between the grinding member and the product during the grinding process can be washed away, improving the grinding effect.

[0037] In this embodiment, a first bearing installation groove 111 and a second bearing installation groove 22 are respectively provided at the position above the accommodation cavity 121 inside the spindle taper shank 1 and on the end cover 2. The central axes of the first bearing installation groove 111 and the second bearing installation groove 22 are collinear with the central axis of the spindle taper shank 1. A first bearing 5 and a second bearing 6 are respectively fixed in the first bearing installation groove 111 and the second bearing installation groove 22. The connecting component 31 is fixed to the inner rings of the first bearing and the second bearing, which improves the assembly stability of the connecting component 31.

[0038] As described above, due to the need to install the connection component 31, a first installation groove is provided at the top of the accommodation cavity 121 and on the central axis of the spindle taper shank 1. If the water flow channel is directly connected to the accommodation cavity 121 at the central axis position, it will pass through the first installation groove at this time, which will affect the connection reliability and stability between the first bearing and the connection component 31. Therefore, in this embodiment, the water flow channel includes a first flow channel 131 located on the central axis of the spindle taper shank 1 and arranged vertically, a second flow channel 132 communicated with the bottom end of the first flow channel 131 and arranged horizontally, a third flow channel 133 communicated with the second flow channel 132 and arranged vertically, and a fourth flow channel 134 communicated with the third flow channel 133 and arranged horizontally. The end of the fourth flow channel 134 far from the third flow channel 133 is communicated with the accommodation cavity 121. In this way, the water flow channel is prevented from affecting the assembly of the first bearing and the connection component 31.

[0039] Further, in this embodiment, the spindle taper shank 1 includes a spindle taper shank main body 11 and a receiving cylinder 12 fixed below the spindle taper shank main body 11. The spindle taper shank main body 11 is provided with the above-mentioned water flow channel, first flow channel 131 and second flow channel 132, and the receiving cylinder 12 is provided with the above-mentioned accommodation cavity 121 and fourth flow channel 134. The second flow channel 132 and the fourth flow channel 134 respectively penetrate the side walls of the spindle taper shank main body 11 and the receiving cylinder 12, and this structure is convenient for processing. After penetrating the corresponding side walls, through holes 14 will be formed. The through holes 14 are detachably and hermetically connected with plugs 7, and the plugs 7 block the through holes 14 to prevent water from leaking out. In actual use, if the grinding device is used in a machining center where the spindle is not equipped with a water outlet structure, the plug 7 in the through hole 14 corresponding to the second flow channel 132 can be removed, and a water inlet device can be externally connected to the plug 7, which can provide high-pressure water to the grinding device. The main purpose of choosing to connect the through hole 14 corresponding to the second flow channel 132 is that when water enters the water flow channel through the through hole 14 and the second flow channel 132 and then enters the accommodation cavity 121, the water can flow from one side of the impeller 4 to the other side above, and the water acts better on the impeller 4, so that the impeller 4 has a faster rotation speed and ensures the grinding effect. There is a flow channel at the relative position between the spindle taper shank main body 11 and the receiving cylinder 12, and the third flow channel 133 is formed after the two are butted.

[0040] The above setting of the water flow channel, while ensuring the connection effect between the connection component 31 and the first bearing, makes the structure of the water flow channel more convenient for processing, reduces costs, and at the same time improves the applicability of the grinding device to different machining centers, with a wide range of applications.

[0041] In this embodiment, the connecting component 31 includes a connecting shaft 311 and an eccentric shaft 312 connected to the bottom of the connecting shaft 311. The connecting shaft 311 is rotatably connected to the spindle taper shank 1 and / or the end cover 2. In this embodiment, the connecting shaft 311 is connected to the spindle taper shank 1 and the end cover 2 through a first bearing and a second bearing, and the central axis of the connecting shaft 311 is collinear with the central axis of the spindle taper shank 1. The central axis of the eccentric shaft 312 is not collinear with the central axis of the connecting shaft 311, and the grinding member 32 is fixedly connected to the eccentric shaft 312. The non-collinearity of the connecting shaft 311 and the eccentric shaft 312 is equivalent to being eccentrically arranged on the spindle taper shank 1, which can ensure that the rotation center of the spindle taper shank 1 can be ground, improving the grinding effect at the position corresponding to the rotation center of the spindle taper shank 1 on the product, and avoiding the problem that the connecting shaft 311 and the eccentric shaft 312 are collinear and located at the rotation center position of the spindle taper shank 1, resulting in poor grinding effect at the position corresponding to the rotation center on the product.

[0042] In this embodiment, preferably, a universal nozzle 8 is detachably connected to the water outlet hole 21. The universal nozzle 8 can adjust the spraying position of water, improving the grinding effect and the dust cleaning effect.

[0043] In this embodiment, the peripheral edges of the fan blade are arranged in such a way that when the fan blade rotates at a high speed, under the action of the centrifugal force of the fan blade, water cannot rush to the concave surface of the fan blade in time, and the water can rush to the edges of the fan blade, playing a role in boosting the fan blade. In addition, the concave surface of the fan blade is arranged in a sharp-angle structure, not an arc structure, which can reduce the rotation resistance of the fan blade.

[0044] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A grinding device for a machining center, characterized in that: It includes a spindle taper shank, an end cap, a grinding assembly and a fan blade; An accommodation cavity and a water flow channel are provided in the spindle taper shank. The accommodation cavity is located at the bottom of the spindle taper shank. One end of the water flow channel communicates with the accommodation cavity, and the other end communicates with the water outlet channel of the spindle of the machining center; The end cap covers the bottom of the accommodation cavity; The grinding assembly includes a connecting assembly and a grinding piece connected to the bottom of the connecting assembly. One end of the connecting assembly passes through the end cap and extends into the accommodation cavity. The connecting assembly is rotatably connected to the spindle taper shank and the end cap. The fan blade is fixedly connected to the connecting assembly and is located in the accommodation cavity, and it rotates under the action of water; A plurality of water outlet holes communicating with the accommodation cavity are provided on the end cap, and the water outlet holes face the outside of the grinding piece; A first bearing mounting groove and a second bearing mounting groove are respectively provided in the spindle taper shank at a position above the accommodation cavity and on the end cap. The central axes of the first bearing mounting groove and the second bearing mounting groove are collinear with the central axis of the spindle taper shank. A first bearing and a second bearing are respectively fixed in the first bearing mounting groove and the second bearing mounting groove, and the connecting assembly is fixed to the inner rings of the first bearing and the second bearing; The water flow channel includes a first flow channel located on the central axis of the spindle taper shank and arranged in the vertical direction, a second flow channel communicated with the bottom end of the first flow channel and arranged in the horizontal direction, a third flow channel communicated with the second flow channel and arranged in the vertical direction, and a fourth flow channel communicated with the third flow channel and arranged in the horizontal direction. The end of the fourth flow channel far from the third flow channel communicates with the accommodation cavity; The first flow channel and the fourth flow channel penetrate through the side wall of the spindle taper shank to form through holes, and the through holes are detachably and sealingly connected with plugs; The spindle taper shank includes a spindle taper shank main body and an accommodation cylinder fixed below the spindle taper shank main body. The first flow channel and the second flow channel are provided in the spindle taper shank main body. The accommodation cavity and the fourth flow channel are provided in the accommodation cylinder. Both the spindle taper shank main body and the accommodation cylinder are provided with flow channels, and the two flow channels are opposite in position and form the third flow channel after being butted; 2. The grinding device for a machining center according to claim 1, characterized in that: The connecting assembly includes a connecting shaft and an eccentric shaft connected to the bottom of the connecting shaft. The connecting shaft is rotatably connected to the spindle taper shank and the end cap and is collinear with the central axis of the spindle taper shank. The central axis of the eccentric shaft is not collinear with the central axis of the connecting shaft, and the grinding piece is fixedly connected to the eccentric shaft; 3. The grinding device for a machining center according to claim 1, characterized in that: The water outlet hole is detachably connected with a universal nozzle.

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