High-precision quick replacement structure for grinding wheel set and numerical control grinding machine applying high-precision quick replacement structure

Abstract

The utility model provides a grinding wheel set high-precision rapid replacement structure and a numerical control grinding machine applying the same. The grinding wheel set high-precision rapid replacement structure comprises a main shaft driving module and a main shaft. The grinding wheel library is mounted on one side of the axial direction of the main shaft and comprises a rotating module, and a plurality of grinding wheel sets are distributed on the rotating module in the circumferential direction; the main shaft is installed on the main shaft driving module to move in multiple directions, the grinding wheel library is installed on one axial side of the main shaft, the rotating module rotates to enable the needed grinding wheel set to coaxially face the main shaft and conduct translation butt joint assembly, replacement of the grinding wheel set is fast and efficient, and the machining capacity of a machine tool is guaranteed. The technical problems that in the prior art, a grinding wheel set in the state directly machines a workpiece and cannot move in multiple directions, and consequently the machining capacity is limited are solved.

Description

Technical Field

[0001] This utility model relates to the field of CNC grinding machine technology, and in particular to a high-precision and fast-change structure for grinding wheel sets and a CNC grinding machine using the same. Background Technology

[0002] CNC grinding machines are machine tools that use CNC technology to grind the surface of workpieces or cutting tools using grinding wheels. They are especially suitable for machining workpieces or cutting tools with complex shapes. The grinding wheel magazine is an important part of this type of machine tool to accommodate the machining needs of various types of cutting tools and tools with complex shapes.

[0003] Chinese patent document CN220051108U discloses a grinding machine for machining the inner ring of tapered roller bearings. The machine tool 1 is also equipped with a grinding wheel magazine 7 for replacing small grinding wheels on the small grinding wheel shaft 41. However, it requires manual or robotic arm to replace the grinding wheel set, which is inefficient, increases the cost of operation and equipment components, and does not specifically disclose the specific structure for replacing the grinding wheel magazine. Summary of the Invention

[0004] One of the purposes of this utility model is to address the shortcomings of the existing technology by providing a high-precision and fast-change structure for grinding wheel sets. By installing a grinding wheel magazine on one side of the spindle's axial direction, the rotating module rotates to make the required grinding wheel set coaxially aligned with the spindle and translate it to achieve automatic high-precision docking and assembly. The replacement of the grinding wheel set is quick and efficient while ensuring the machine tool's processing capability, solving the technical problems of low replacement efficiency and unreliable accuracy of grinding wheel sets on the spindle in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-precision, quick-change structure for grinding wheel sets includes a spindle drive module and a spindle mounted on the spindle drive module; it also includes a grinding wheel magazine mounted on one axial side of the spindle, the grinding wheel magazine including a rotating module, on which a plurality of grinding wheel sets are arranged circumferentially, the rotating module rotating so that one of the grinding wheel sets is coaxially aligned with the spindle, and the spindle and the rotating module translating relative to each other to perform docking and assembly of the grinding wheel sets.

[0007] Preferably, the grinding wheel magazine further includes a translation module, wherein the rotation module is mounted on the translation module to be driven by the translation module to translate along the axial direction of the main shaft.

[0008] Preferably, the spindle is provided with a clamping mechanism for clamping and fixing the grinding wheel set. During assembly, the spindle extends into the grinding wheel shaft of the grinding wheel set and the clamping mechanism tightens and connects the two.

[0009] Preferably, the grinding wheel set includes a grinding wheel shaft and several grinding wheels coaxially mounted on the grinding wheel shaft, and the end of the grinding wheel shaft is recessed with an assembly hole that cooperates with the clamping mechanism for fastening.

[0010] Preferably, the rotating module includes: a slide block, a rotating drive unit mounted on the slide block, and a rotating platform mounted on the rotating drive unit, wherein grinding wheel frames for mounting grinding wheel sets are evenly distributed circumferentially on the upper surface of the rotating platform.

[0011] Preferably, the grinding wheel holder is vertically mounted on a rotating platform, and a U-shaped groove is provided on its upper part. At least the inner walls on both sides of the U-shaped groove are provided with limiting protrusions for axially limiting the grinding wheel shaft. The limiting protrusions are adapted to the grooves provided on the outer wall of the grinding wheel shaft.

[0012] Preferably, the limiting protrusion has a trapezoidal cross-section, and the groove on the outer wall of the grinding wheel shaft is adapted to it, with the two fitting together in the axial direction of the grinding wheel shaft.

[0013] Preferably, the translation module includes: a slider, a slide block slidably mounted on the slider, and a rack provided on the slide block along the axial direction of the main shaft; and a translation drive unit, the rotation drive end of the translation drive unit being connected to a gear, the gear meshing with the rack.

[0014] Preferably, the spindle drive module includes an X-axis module along the spindle axis and a Z-axis module mounted on the X-axis module, with the spindle mounted on the Z-axis module.

[0015] This utility model also provides a CNC grinding machine, including a grinding machine base; and further including: a high-precision quick-change structure for the grinding wheel group as described above, wherein the spindle drive module and the grinding wheel magazine are both mounted on the grinding machine base, and the grinding wheel magazine further includes a mounting base connected to the grinding machine base.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) This utility model utilizes the multi-directional movement of the spindle in conjunction with the rotation of the grinding wheel magazine to switch grinding wheel sets and the translational movement to achieve more efficient movement between the spindle and the grinding wheel set to be replaced. The docking and assembly stroke is short, which greatly improves the replacement efficiency of the grinding wheel set.

[0018] (2) The translation module of the grinding wheel magazine adopts a combination of two precision transmission methods: sliding guide rail and gear rack, in order to achieve reliable movement, ensure accuracy, and improve assembly efficiency and reliability.

[0019] (3) The installation structure design of the grinding wheel frame and grinding wheel set of this utility model minimizes the installation error between the two and improves the positional accuracy of the grinding wheel set on the grinding wheel magazine, so as to effectively ensure the docking and assembly accuracy of the grinding wheel magazine and the spindle, and further improve the assembly efficiency and reliability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the grinding wheel magazine in this utility model;

[0023] Figure 4 for Figure 3 A sectional view;

[0024] Figure 5 This is a schematic diagram of the installation of the grinding wheel frame and grinding wheel assembly in this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Example 1

[0028] like Figure 1-2 As shown, a high-precision, quick-change structure for grinding wheel sets includes a spindle drive module 1 and a spindle 2 mounted on the spindle drive module 1; it also includes a grinding wheel magazine 3 mounted on one axial side of the spindle 2, the grinding wheel magazine 3 including a rotating module 4, on which a plurality of grinding wheel sets 5 are arranged circumferentially, the rotating module 4 rotates so that one of the grinding wheel sets 5 is coaxially aligned with the spindle 2, and the spindle 2 and the rotating module 4 translate relative to each other to perform docking and assembly of the grinding wheel sets 5.

[0029] In this embodiment, by installing a grinding wheel magazine 3 on one side of the spindle 2, the docking and assembly stroke is short, quick and efficient.

[0030] like Figure 2 As shown, the spindle 2 is equipped with a clamping mechanism at its shaft end for clamping and fixing the grinding wheel set 5.

[0031] As an improvement, the grinding wheel set 5 includes a grinding wheel shaft 51 and several grinding wheels 52 coaxially mounted on the grinding wheel shaft 51. The end of the grinding wheel shaft 51 is recessed with an assembly hole 50 that cooperates with the clamping mechanism for fastening. During the docking assembly, the spindle 2 extends into the grinding wheel shaft 51 of the grinding wheel set 5 and the clamping mechanism tightens and connects the two.

[0032] The clamping mechanism can be a commercially available machine tool spindle puller structure, such as a four-lobed puller. The inner diameter of the mounting hole 50 of the grinding wheel shaft 51 is adapted to the outer diameter of the puller, thereby achieving a tension fit.

[0033] As an improvement, such as Figure 3-4 As shown, the rotating module 4 includes: a slide 41, a rotating drive unit 42 mounted on the slide 41, and a rotating table 43 mounted on the rotating drive unit 42. Grinding wheel frames 44 for mounting grinding wheel sets 5 are evenly distributed along the circumference of the upper surface of the rotating table 43.

[0034] Preferably, the rotating shaft of the rotary drive unit 42 is vertically arranged, its driving end is connected to the rotary table 43, and its non-driving part is mounted on the slide 41. In some embodiments, the rotary drive unit 42 can be a commercially available direct drive motor, or a drive motor with servo function, to achieve precise position control.

[0035] In this embodiment, as Figure 5As shown, the grinding wheel holder 44 is vertically mounted on the rotary table 43, and a U-shaped groove 441 is provided on its upper part. At least two inner walls of the U-shaped groove 441 are provided with limiting protrusions 442 for axially limiting the grinding wheel shaft 51. The limiting protrusions 442 are adapted to the grooves 511 on the outer wall of the grinding wheel shaft 51. The limiting protrusions 442 have a trapezoidal cross-section, and the grooves 511 on the outer wall of the grinding wheel shaft 51 are adapted to it and are tightly fitted in the axial direction of the grinding wheel shaft 51. The gap between the two is only required to ensure that the grinding wheel shaft 51 can slide out vertically. This rigid fit structure design minimizes the installation error between the two, improves the positional accuracy of the grinding wheel set on the grinding wheel magazine, effectively ensures the docking and assembly accuracy of the grinding wheel magazine and the spindle, and further improves the assembly efficiency and reliability.

[0036] like Figure 1 As shown, the spindle drive module 1 includes an X-axis module 11 along the axial direction of the spindle 2 and a Z-axis module 12 mounted on the X-axis module 11, with the spindle 2 mounted on the Z-axis module 12. The spindle drive module 1 drives the spindle 2 to move along the X and Z axes.

[0037] like Figure 1 As shown, the grinding wheel magazine 3 further includes a translation module 6, on which the rotation module 4 is mounted to be driven by the translation module 6 to translate along the axial direction of the main shaft 2.

[0038] As an improvement, the translation module 6 drives the rotation module 4 to move along the axial direction of the spindle 2 to perform docking assembly and replacement of the grinding wheel set 5. The rotation drive unit 42 drives the rotary table 43 to rotate. Each rotation of the rotary table 43 rotates the grinding wheel set 5 at the corresponding position to the docking assembly position facing the spindle 2. Then, the translation module 6 and / or the spindle drive module 1 drive the translation so that the grinding wheel set 5 docks with the spindle 2.

[0039] In some embodiments, such as Figure 2 As shown, the grinding wheel magazine 3 also includes a mounting base 8, and the slider 61 is mounted on the mounting base 8 and is adapted to the guide rail provided on the slide 41 to realize the synchronous translation of the grinding wheel group 5.

[0040] Specifically, such as Figure 4 As shown, the translation module 6 includes: a slider 61, a slide block 41 slidably mounted on the slider 61, and a rack 62 arranged on the slide block 41 along the axial direction of the main shaft 2; and a translation drive unit 63, which is mounted on the mounting base 8 and has a gear 64 connected to its rotation drive end, and the gear 64 meshes with the rack 62.

[0041] In some embodiments, the translation drive unit 63 is preferably a motor.

[0042] In this embodiment, a spindle 2 is installed on the spindle drive module 1 for multi-directional movement, and a grinding wheel magazine 3 is installed on one axial side of the spindle 2. Several grinding wheel sets 5 are arranged circumferentially on its rotating module 4.

[0043] Example 2

[0044] A type of CNC grinding machine, such as Figure 1 As shown, it includes a grinding machine base 7; it also includes a high-precision quick-change structure for the grinding wheel set as described in the above embodiment, wherein the spindle drive module 1 is vertically mounted on the grinding machine base 7, and the grinding wheel magazine 3 is mounted on the grinding machine base 7 via a mounting seat 8.

[0045] Work process:

[0046] When the grinding wheel set 5 on the spindle is replaced, the rotary module 4 drives the empty space on the grinding wheel magazine 3 to rotate to the coaxial position with the assembly station of the spindle 2, and the translation module 6 drives the whole to translate to the assembly station. The spindle 2 moves down to place the grinding wheel set 5 on the empty grinding wheel holder 44, the clamping mechanism on the spindle 2 releases the grinding wheel magazine 3 to retract, and the grinding wheel set 5 is disengaged from the spindle.

[0047] When a new grinding wheel set 5 needs to be replaced on the spindle 2, the required grinding wheel set 5 is rotated to the docking assembly station so that it is coaxially aligned with the spindle 2. The translation module 6 drives the entire assembly to translate and complete the docking assembly of the grinding wheel set 5 and the spindle. Then, the spindle 2 moves up until the grinding wheel set 5 is disengaged from the grinding wheel holder 44 and then moves to the processing station for grinding. The replacement is quick and efficient, the assembly accuracy is high, and the processing capability of the machine tool is guaranteed.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision, quick-change structure for a grinding wheel set, comprising a spindle drive module and a spindle mounted on the spindle drive module; characterized in that, It also includes a grinding wheel magazine installed on one side of the spindle axis. The grinding wheel magazine includes a rotating module with several grinding wheel sets distributed circumferentially on the rotating module. The rotating module rotates so that one of the grinding wheel sets is coaxially facing the spindle. The spindle and the rotating module translate relative to each other to assemble the grinding wheel sets.

2. The high-precision quick replacement structure of a grinding wheel set according to claim 1, characterized in that, The grinding wheel magazine also includes: A translation module, wherein the rotation module is mounted on the translation module to be driven by the translation module to translate along the axial direction of the main shaft.

3. The high-precision quick replacement structure of a grinding wheel set according to claim 1, characterized in that, The spindle is provided with a clamping mechanism at its shaft end for clamping and fixing the grinding wheel set. During assembly, the spindle extends into the grinding wheel shaft of the grinding wheel set and the clamping mechanism tightens and connects the two.

4. The high-precision quick replacement structure of a grinding wheel set according to claim 3, characterized in that, The grinding wheel assembly includes a grinding wheel shaft and several grinding wheels coaxially mounted on the grinding wheel shaft. The end of the grinding wheel shaft is recessed with an assembly hole that cooperates with the clamping mechanism for fastening.

5. The high-precision quick-change structure for a grinding wheel set according to claim 2, characterized in that, The rotating module includes: The slide, the rotary drive unit mounted on the slide, and the rotary table mounted on the rotary drive unit, wherein grinding wheel frames for mounting grinding wheel sets are evenly distributed along the circumferential upper surface of the rotary table.

6. The high-precision quick-change structure for a grinding wheel set according to claim 5, characterized in that, The grinding wheel holder is vertically mounted on a rotating platform, and a U-shaped groove is provided on its upper part. At least two inner walls of the U-shaped groove are provided with limiting protrusions for axially limiting the grinding wheel shaft. The limiting protrusions are adapted to the grooves provided on the outer wall of the grinding wheel shaft.

7. The high-precision quick-change structure for a grinding wheel set according to claim 6, characterized in that, The limiting protrusion has a trapezoidal cross-section, and the groove on the outer wall of the grinding wheel shaft is adapted to it. The two are fitted together in the axial direction of the grinding wheel shaft.

8. The high-precision quick-change structure for a grinding wheel set according to claim 5, characterized in that, The translation module includes: A slider, wherein the slide block is slidably mounted on the slider, and a rack is provided on the slide block along the axial direction of the main shaft; The translation drive unit has a gear connected to its rotation drive end, and the gear meshes with a rack.

9. A high-precision, quick-change structure for a grinding wheel set according to any one of claims 1-4, characterized in that, The spindle drive module includes an X-axis module along the spindle axis and a Z-axis module mounted on the X-axis module, with the spindle mounted on the Z-axis module.

10. A CNC grinding machine, comprising a grinding machine base; characterized in that, Also includes: In the high-precision quick-change structure for the grinding wheel set as described in any one of claims 1-9, the spindle drive module and the grinding wheel magazine are both mounted on the grinding machine base, and the grinding wheel magazine further includes a mounting base connected to the grinding machine base.

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