A grinding device for a numerically controlled machine tool

Abstract

The application discloses a grinding device for a numerical control machine tool and relates to the technical field of machine tool machining. The grinding device comprises a base and a machining table. The machining table is provided with a center butt joint mechanism and a lifting mechanism. The base is provided with a three-axis moving frame. The three-axis moving frame is provided with a grinding motor. The output shaft of the grinding motor is provided with a connecting mechanism. The connecting mechanism is connected with a grinding drill bit. The connecting mechanism comprises a butt joint head which is arranged opposite to the end of the output shaft. The butt joint head is detachably butt jointed with the end of the output shaft. The butt joint head is provided with a connecting head. The connecting head is rotatably arranged with a rotating frame. The rotating frame is inserted with a connecting shaft. The end of the connecting shaft is connected with the grinding drill bit. The output shaft and the connecting shaft are provided with a driving assembly. The connecting mechanism is arranged between the output shaft and the connecting shaft, so that the grinding drill bit is driven to adjust the angle, and the plane grinding machining or the cylindrical surface grinding machining of shaft parts and the surface grinding machining operation of special-shaped parts are adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool processing, and particularly relates to a grinding device for a numerical control machine tool. BACKGROUND

[0002] Grinding is a process method for cutting workpiece surfaces by using grinding tools (such as grinding wheels, abrasive belts, etc.), and the grinding tools are composed of numerous tiny abrasive grains. During grinding, the abrasive grains are equivalent to tiny cutting edges. The grinding wheel rotates at a high speed (usually the rotating speed can reach thousands of revolutions per minute or even higher), and the abrasive grains cut into the workpiece surface at a very high speed. Since the shape of the abrasive grains is irregular, the cutting process is discontinuous, and each abrasive grain draws a tiny cutting mark on the workpiece surface, and the cutting action of numerous abrasive grains is superimposed to realize the removal of the workpiece surface material.

[0003] Machine tool grinding equipment is a mechanical device for grinding workpieces. With the continuous development of machining technology, the precision requirements and adaptation range of numerical control machine tools for machining are also continuously improved. The existing machine tool grinding device can only realize single grinding machining, such as plane grinding or cylindrical surface grinding, and cannot flexibly adjust the grinding machining mode according to the shape of the workpiece. SUMMARY

[0004] The present application aims to provide a grinding device for a numerical control machine tool to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A grinding device for a numerical control machine tool, comprising a base, a machining table is arranged on the base, a center docking mechanism is arranged on the machining table, the center docking mechanism comprises a first chuck and a second chuck arranged at both ends of the machining table, a lifting mechanism is arranged between the first chuck and the second chuck and the base, a three-axis moving frame is arranged on the base, a grinding motor is arranged on the three-axis moving frame, a connecting mechanism is arranged on the output shaft of the grinding motor, and a grinding drill bit is connected to the connecting mechanism.

[0007] The connecting mechanism comprises a docking head arranged opposite to the end of the output shaft, the docking head is detachably and dockingly mounted with the end of the output shaft, a connecting head is arranged on the docking head, a rotating frame is rotatably mounted on the connecting head, a connecting shaft is inserted into the rotating frame, the end of the connecting shaft is connected with the grinding drill bit, a first docking groove and a second docking groove are arranged on the connecting head at intervals of 90 degrees, the first docking groove is fixedly mounted with the connecting head, the second docking groove is rotatably mounted with the connecting head, a matching plug is arranged on the end of the connecting shaft away from the grinding drill bit, when the first docking groove and the matching plug are matched with each other, the output shaft and the grinding drill bit are coaxially mounted, when the second docking groove and the matching plug are matched with each other, the output shaft and the grinding drill bit are perpendicularly mounted, and a driving assembly is arranged between the output shaft and the connecting shaft.

[0008] As a further scheme of the present application, a right-angle frame two is fixedly mounted on the shell of the grinding motor, a clamping ring is rotatably mounted on the docking head, a limiting ring is arranged on both sides of the clamping ring, a right-angle frame one is arranged on the clamping ring, the adjacent edges of the right-angle frame one and the right-angle frame two are inserted into each other, and a telescopic motor two is arranged between the right-angle frame one and the right-angle frame two.

[0009] As a further scheme of the present application, the driving assembly comprises a bevel gear one coaxially mounted on the output shaft, a bevel gear two is arranged on the outer side of the connecting shaft, an electromagnet two is arranged in the matching plug, a magnet is arranged in the inner ring of the first docking groove and the second docking groove, a rotating motor is arranged at the rotating axis part of the connecting head and the rotating frame, and when the matching plug and the second docking groove are matched with each other, the bevel gear one and the bevel gear two are meshed with each other.

[0010] As a further scheme of the present application, an upper half sleeve and a lower half sleeve are sleeved on the outer side of the connecting shaft, the upper half sleeve and the lower half sleeve are fixedly connected through bolts, clamping grooves are uniformly arranged between the upper half sleeve and the lower half sleeve, a matching block is arranged on the inner side of the bevel gear two corresponding to the position of the clamping groove, the clamping groove and the matching block are slidably mounted, a supporting spring is arranged between the clamping groove and the matching block, connecting rods are uniformly arranged on the outer side of the connecting shaft, the connecting rods are connected with the end surface of the bevel gear two, a connecting frame is arranged between the rotating frame and the lower half sleeve, the connecting frame is fixedly connected with the rotating frame, and the connecting frame is annularly clamped with the outer surface of the lower half sleeve.

[0011] As a further scheme of the present application, a mounting ring is arranged on one of the limiting rings, adsorbing iron blocks are uniformly arranged on the mounting ring, and electromagnets are arranged on the right-angle frame one corresponding to the positions of the adsorbing iron blocks.

[0012] As a further embodiment of the present invention: a central frame is provided at the center of the second chuck, the central frame is connected to the docking frame, and a telescopic motor is provided on the side of the docking frame, the telescopic motor being connected to the second chuck.

[0013] As a further embodiment of the present invention: the lifting mechanism includes sliding guide rails symmetrically arranged on the base, one end of the sliding guide rail is fixedly connected to a plug-in frame, the plug-in frame is plugged into the edge of the base, a bidirectional lead screw is rotatably installed between the plug-in frames, the bidirectional lead screw is connected to a drive motor, a locking slider is provided on the bidirectional lead screw, the bottom of the locking slider is slidably locked with the sliding guide rail, and a connecting frame is rotatably installed between the upper side of the locking slider and the central docking mechanism.

[0014] As a further embodiment of the present invention: the processing table is uniformly provided with fixing holes, and multiple fixing brackets are distributed on the processing table.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) By setting up a power connection between the connector and the output shaft, and setting up a rotating frame in conjunction with the connector, when the connecting shaft and the grinding drill bit are connected to the first mating groove, the power of the output shaft is transmitted to the connector and the connecting head, and then transmitted to the mating plug and the connecting shaft through the first mating groove, thereby driving the grinding drill bit at the end to rotate. The bottom surface of the grinding drill bit, combined with the three-axis moving frame, can realize the surface grinding of the workpiece on the processing table. When it is necessary to grind the surface of the shaft part, control the connector and the end of the output shaft to separate from each other, and then control the rotating frame to rotate 90 degrees so that the mating plug at the end of the connecting shaft points to the second mating groove. When the mating plug and the second mating groove are engaged, the power on the output shaft is transmitted to the vertically arranged connecting shaft in conjunction with the drive assembly, thereby driving the grinding drill bit at the end to rotate horizontally. When the grinding drill bit is horizontally close to the surface of the shaft part, the cylindrical surface of the shaft part can be ground. It should be noted that when machining cylindrical surfaces, the rotation direction of the grinding drill bit is opposite to the rotation direction of the shaft parts, and the shaft parts are rotated and installed through a center docking mechanism.

[0017] (2) An upper half and a lower half are fitted onto the connecting shaft. The upper half and the lower half are connected by bolts. The upper half is fixedly connected to the rotating frame through the lower half and the connecting frame. When the connecting shaft is engaged with the first or second mating slot through the mating plug, the connecting shaft, together with the connecting rod, pulls the bevel gear two to slide in the snap-fit ​​slot, thereby making the bevel gear two mesh with the bevel gear one. When it is necessary to control the separation of the bevel gear two and the bevel gear one, a reverse current is directly applied to the electromagnet two, so that the electromagnet two and the magnet in the second mating slot generate the same magnetic properties, thereby generating a repulsive force. Combined with the support spring set in the snap-fit ​​slot, the bevel gear two and the connecting shaft are reset, thereby flexibly controlling the engagement or disengagement between the mating plug and the first and second mating slots. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the installation of the central docking mechanism and the base of the present invention.

[0020] Figure 3 This is a schematic diagram showing the connection between the central docking mechanism and the lifting mechanism of the present invention.

[0021] Figure 4 This is a schematic diagram showing the connection between the three-axis moving frame and the grinding drill bit in this invention.

[0022] Figure 5 This is a schematic diagram of the installation of the connecting mechanism in this invention.

[0023] Figure 6 This is a schematic diagram showing the connection between the connecting mechanism and the grinding motor in this invention.

[0024] Figure 7 This is a schematic diagram of the connection structure of the connector in this invention.

[0025] Figure 8 This is a schematic diagram showing the distribution of the first docking groove and the second docking groove in this invention.

[0026] Figure 9 This is a schematic diagram of the installation structure of the second bevel gear in this invention.

[0027] Figure 10 This is a schematic diagram of the connection between the connecting shaft and the second bevel gear in this invention.

[0028] Figure 11 This is a schematic diagram of the cross-sectional structure of the bevel gear II in this invention.

[0029] Figure 12 This is a schematic diagram showing the connection between the upper and lower halves of the device in this invention.

[0030] In the diagram: 1. Base; 10. Machining table; 11. Fixed bracket; 2. Three-axis moving frame; 3. Lifting mechanism; 30. Sliding guide rail; 31. Snap-fit ​​slider; 32. Two-way lead screw; 33. Connecting frame; 34. Drive motor; 35. Insertion frame; 4. Center docking mechanism; 40. First chuck; 41. Second chuck; 42. Docking frame; 43. Telescopic motor one; 44. Center frame; 5. Grinding motor; 50. Output shaft; 6. Connecting mechanism; 60. Bevel gear one; 61. Connector; 62. Snap-fit ​​ring; 63. Right-angle frame one; 64. Right-angle bracket II; 65. Telescopic motor II; 66. Limiting ring; 67. Mounting ring; 68. Adsorption iron block; 69. Electromagnet I; 610. Connecting joint; 611. First mating slot; 612. Second mating slot; 613. Rotating frame; 614. Connecting shaft; 615. Mating plug; 616. Connecting frame; 617. Bevel gear II; 6170. Mating block; 618. Rotating motor; 619. Connecting rod; 620. Upper half-set; 621. Lower half-set; 622. Snap-fit ​​groove; 623. Support spring; 7. Grinding drill bit. Detailed Implementation

[0031] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0032] like Figure 1 , Figure 2 As shown, a grinding device for a CNC machine tool includes a base 1, a processing table 10 on the base 1, a center docking mechanism 4 on the processing table 10, the center docking mechanism 4 including a first chuck 40 and a second chuck 41 at both ends of the processing table 10, a lifting mechanism 3 between the first chuck 40 and the second chuck 41 and the base 1, a three-axis moving frame 2 on the base 1, a grinding motor 5 on the three-axis moving frame 2, a connecting mechanism 6 on the output shaft 50 of the grinding motor 5, and a grinding drill bit 7 connected to the connecting mechanism 6.

[0033] like Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the connecting mechanism 6 includes a connector 610 positioned opposite the end of the output shaft 50. The connector 610 is detachably and can be installed with the end of the output shaft 50. A connector 61 is provided on the connector 610, and a rotating frame 613 is rotatably mounted on the connector 61. A connecting shaft 614 is inserted into the rotating frame 613, and the end of the connecting shaft 614 is connected to the grinding drill bit 7. The connector 61 has a first mating groove 611 and a second mating groove 612 spaced 90 degrees apart. The first mating groove 611 is connected to the connecting shaft 7. The connectors 61 are fixedly installed together, the second mating groove 612 is rotatably installed between the connector 61, and the end of the connecting shaft 614 away from the grinding drill bit 7 is provided with a mating plug 615. When the first mating groove 611 and the mating plug 615 are mated together, the output shaft 50 and the grinding drill bit 7 are coaxially installed. When the second mating groove 612 and the mating plug 615 are mated together, the output shaft 50 and the grinding drill bit 7 are perpendicularly installed. A drive assembly is provided between the output shaft 50 and the connecting shaft 614.

[0034] Specifically, the grinding drill bit 7 is connected to the output shaft 50 of the grinding motor 5 via the connecting mechanism 6. The output shaft 50 is connected to the connecting head 610 via a power connection. A rotating frame 613 is set up with the connecting head 61. When the connecting shaft 614 and the grinding drill bit 7 are connected to the first docking groove 611, the power of the output shaft 50 is transmitted to the connecting head 610 and the connecting head 61, and then through the first docking groove 611 to the mating plug 615 and the connecting shaft 614, thereby driving the grinding drill bit 7 at the end to rotate. The bottom surface of the grinding drill bit 7, combined with the three-axis moving frame 2, can perform surface grinding on the workpiece on the processing table 10.

[0035] More specifically, when grinding is required on the surface of shaft-like parts, the ends of the coupling 610 and the output shaft 50 can be separated. Then, the rotating frame 613 is rotated 90 degrees, causing the mating plug 615 at the end of the connecting shaft 614 to point towards the second mating groove 612. When the mating plug 615 and the second mating groove 612 are engaged, the drive assembly transmits power from the output shaft 50 to the vertically arranged connecting shaft 614, thereby driving the grinding drill 7 at the end to rotate horizontally. When the grinding drill 7 approaches the surface of the shaft-like part horizontally, the cylindrical surface of the shaft-like part can be ground. It should be noted that when machining the cylindrical surface, the rotation direction of the grinding drill 7 is opposite to the rotation direction of the shaft-like part. The shaft-like part is rotated and installed via the center docking mechanism 4.

[0036] Furthermore, such as Figure 6As shown, a right-angle bracket 64 is fixedly installed on the housing of the grinding motor 5, and a snap ring 62 is rotatably installed on the connector 610. Limiting rings 66 are provided on both sides of the snap ring 62 on the connector 610. A right-angle bracket 63 is provided on the snap ring 62. The adjacent sides of the right-angle bracket 63 and the right-angle bracket 64 are interlocked. A telescopic motor 65 is provided between the right-angle bracket 63 and the right-angle bracket 64.

[0037] Specifically, the telescopic motor 65 drives the right-angle bracket 63 to move, thereby causing the connector 610 and the lower part to separate from the end of the output shaft 50, cutting off the power connection between the connector 610 and the output shaft 50, so that the drive assembly can vertically transmit the power on the output shaft 50 to the connecting shaft 614, thereby vertically driving the grinding drill bit 7 to rotate.

[0038] Furthermore, such as Figure 6 , Figure 9 As shown, the drive assembly includes a bevel gear 60 coaxially mounted on the output shaft 50, a bevel gear 617 disposed on the outer side of the connecting shaft 614, an electromagnet 617 disposed inside the mating plug 615, magnets disposed on the inner rings of the first mating groove 611 and the second mating groove 612, and a rotating motor 618 disposed on the rotation axis of the connector 61 and the rotating frame 613. When the mating plug 615 and the second mating groove 612 are mated together, the bevel gear 60 and the bevel gear 617 mesh with each other.

[0039] Specifically, when the rotating frame 613 is adjusted to a horizontal state under the drive of the rotating motor 618, the electromagnet at the connecting end of the connecting shaft 614 and the second docking groove 612 are connected to each other. At the same time, the bevel gear 60 on the output shaft 50 and the bevel gear 617 on the connecting shaft 614 mesh with each other. The power on the output shaft 50 is transmitted to the vertical connecting shaft 614, thereby driving the horizontal grinding drill 7 to rotate.

[0040] Furthermore, such as Figure 10 , Figure 11 , Figure 12As shown, an upper half-sleeve 620 and a lower half-sleeve 621 are sleeved on the outer side of the connecting shaft 614. The upper half-sleeve 620 and the lower half-sleeve 621 are fixedly connected by bolts. The upper half-sleeve 620 and the lower half-sleeve 621 are evenly distributed with snap-fit ​​grooves 622. The inner side of the bevel gear 617 is provided with a mating block 6170 corresponding to the snap-fit ​​groove 622. The mating block 6170 is slidably installed with the snap-fit ​​groove 622. A support spring 623 is provided between the snap-fit ​​groove 622 and the mating block 6170. The outer side of the connecting shaft 614 is evenly distributed with connecting rods 619. The connecting rods 619 are connected to the end face of the bevel gear 617. A connecting frame 616 is provided between the rotating frame 613 and the lower half-sleeve 621. The connecting frame 616 is fixedly connected to the rotating frame 613. The connecting frame 616 is annularly snapped with the outer surface of the lower half-sleeve 621.

[0041] Specifically, to facilitate the engagement or disengagement of bevel gear 617 and bevel gear 60, an upper half-sleeve 620 and a lower half-sleeve 621 are fitted onto the connecting shaft 614. The upper half-sleeve 620 and the lower half-sleeve 621 are connected by bolts. The upper half-sleeve 620 is fixedly connected to the rotating frame 613 through the lower half-sleeve 621 and the connecting frame 616. When the connecting shaft 614 engages with the first mating groove 611 or the second mating groove 612 through the mating plug 615, the connecting shaft 614, together with the connecting rod 619, pulls bevel gear 617 to slide in the snap-fit ​​groove 622, thereby enabling bevel gear 617 and bevel gear 60 to mesh with each other. When it is necessary to control the separation of bevel gear 2 617 and bevel gear 1 60, a reverse current is directly applied to electromagnet 2, causing electromagnet 2 to generate the same magnetic field as the magnet in the second mating groove 612, thereby generating a repulsive force. Combined with the support spring 623 set in the snap-fit ​​groove 622, bevel gear 2 617 and connecting shaft 614 are reset, thereby flexibly controlling the engagement or disengagement between the mating plug 615 and the first mating groove 611 and the second mating groove 612.

[0042] Furthermore, such as Figure 7 As shown, a mounting ring 67 is provided on one of the limiting rings 66, and adsorption iron blocks 68 are evenly distributed on the mounting ring 67. An electromagnet 69 is provided on the right-angle bracket 63 at the position corresponding to the adsorption iron blocks 68.

[0043] Specifically, by setting the mounting ring 67 to evenly distribute the adsorption iron blocks 68, and by adjusting the angle of the connector 610 and the bottom connector 61 with the electromagnet 69 on the right-angle bracket 63, the pointing angle of the grinding drill bit 7 after rotating to a horizontal state is controlled, thereby meeting the grinding requirements of irregular workpieces and further expanding the grinding adaptability range.

[0044] Furthermore, such as Figure 2 , Figure 3As shown, a center frame 44 is provided at the center of the second chuck 41. The center frame 44 is connected to the docking frame 42. A telescopic motor 43 is provided on the side of the docking frame 42. The telescopic motor 43 is connected to the second chuck 41.

[0045] Furthermore, such as Figure 3 As shown, the lifting mechanism 3 includes sliding guide rails 30 symmetrically arranged on the base. One end of the sliding guide rail 30 is fixedly connected to a connector 35. The connector 35 is inserted into the edge of the base 1. A bidirectional lead screw 32 is rotatably installed between the connectors 35. The bidirectional lead screw 32 is connected to a drive motor 34. A locking slider 31 is provided on the bidirectional lead screw. The bottom of the locking slider 31 is slidably locked with the sliding guide rail 30. A connecting frame 33 is rotatably installed between the upper side of the locking slider 31 and the central docking mechanism 4.

[0046] Specifically, when grinding the cylindrical surface of a shaft-type part, the first chuck 40 and the second chuck 41 at both ends are first raised using the lifting mechanism 3. The two ends of the shaft-type part are respectively clamped and fixed by the first chuck 40 and the second chuck 41. The shaft-type part is controlled to rotate between the first chuck 40 and the second chuck 41. After the grinding drill bit 7 is adjusted to a horizontal state, the grinding drill bit 7 is gradually moved to the surface of the shaft-type part using the three-axis moving frame 2, thereby grinding the surface of the shaft-type part.

[0047] Furthermore, such as Figure 2 As shown, the processing table 10 is provided with evenly spaced fixing holes, and multiple fixing brackets 11 are distributed on the processing table 10.

[0048] Specifically, during planar machining, the part is mounted on the machining table 10 through the fixing hole and the fixing bracket 11, and the grinding drill 7 points vertically to the workpiece on the machining table 10 and performs planar grinding operation.

[0049] The working principle of this invention embodiment is as follows:

[0050] like Figures 1-12As shown, the grinding drill bit 7 is connected to the output shaft 50 of the grinding motor 5 via the connecting mechanism 6. The output shaft 50 is connected to the connecting head 610 via a power connection. A rotating frame 613 is set with the connecting head 61. When the connecting shaft 614 and the grinding drill bit 7 are connected with the first docking groove 611, the power of the output shaft 50 is transmitted to the connecting head 610 and the connecting head 61, and then through the first docking groove 611 to the mating plug 615 and the connecting shaft 614, thereby driving the grinding drill bit 7 at the end to rotate. The bottom surface of the grinding drill bit 7, combined with the three-axis moving frame 2, can realize the surface grinding of the workpiece on the processing table 10. When grinding is required on the surface of shaft-like parts, the ends of the coupling 610 and the output shaft 50 can be separated. Then, the rotating frame 613 is rotated 90 degrees, causing the mating plug 615 at the end of the connecting shaft 614 to point towards the second mating groove 612. When the mating plug 615 and the second mating groove 612 are engaged, the drive assembly transmits power from the output shaft 50 to the vertically arranged connecting shaft 614, thereby driving the grinding drill 7 at the end to rotate horizontally. When the grinding drill 7 approaches the surface of the shaft-like part horizontally, the cylindrical surface of the shaft-like part can be ground. It should be noted that when machining the cylindrical surface, the rotation direction of the grinding drill 7 is opposite to the rotation direction of the shaft-like part. The shaft-like part is rotated and installed via the center docking mechanism 4. To facilitate the engagement or disengagement of bevel gear 617 and bevel gear 60, an upper half-sleeve 620 and a lower half-sleeve 621 are fitted onto the connecting shaft 614. The upper half-sleeve 620 and the lower half-sleeve 621 are connected by bolts. The upper half-sleeve 620 is fixedly connected to the rotating frame 613 via the lower half-sleeve 621 and the connecting frame 616. When the connecting shaft 614 engages with the first mating groove 611 or the second mating groove 612 via the mating plug 615, the connecting shaft 614, together with the connecting rod 619, pulls bevel gear 617 to slide within the snap-fit ​​groove 622, thereby enabling bevel gear 617 and bevel gear 60 to mesh with each other. When it is necessary to control the separation of bevel gear 2 617 and bevel gear 1 60, a reverse current is directly applied to electromagnet 2, causing electromagnet 2 to generate the same magnetic field as the magnet in the second mating groove 612, thereby generating a repulsive force. Combined with the support spring 623 set in the snap-fit ​​groove 622, bevel gear 2 617 and connecting shaft 614 are reset, thereby flexibly controlling the engagement or disengagement between the mating plug 615 and the first mating groove 611 and the second mating groove 612. When grinding the cylindrical surface of shaft parts, the first chuck 40 and the second chuck 41 at both ends are first raised by the lifting mechanism 3. The two ends of the shaft part are respectively snapped and fixed by the first chuck 40 and the second chuck 41. The shaft part is controlled to rotate between the first chuck 40 and the second chuck 41. After the grinding drill bit 7 is adjusted to a horizontal state, the grinding drill bit 7 is gradually moved to the surface of the shaft part by the three-axis moving frame 2, thereby grinding the surface of the shaft part.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A grinding device for a CNC machine tool, comprising a base (1) on which a machining table (10) is disposed, characterized in that, The processing table (10) is provided with a center docking mechanism (4). The center docking mechanism (4) includes a first chuck (40) and a second chuck (41) at both ends of the processing table (10). A lifting mechanism (3) is provided between the first chuck (40) and the second chuck (41) and the base (1). A three-axis moving frame (2) is provided on the base (1). A grinding motor (5) is provided on the three-axis moving frame (2). A connecting mechanism (6) is provided on the output shaft (50) of the grinding motor (5). A grinding drill bit (7) is connected to the connecting mechanism (6). The connecting mechanism (6) includes a connector (610) positioned opposite the end of the output shaft (50). The connector (610) is detachably and can be installed with the end of the output shaft (50). A connector (61) is provided on the connector (610), and a rotating frame (613) is rotatably mounted on the connector (61). A connecting shaft (614) is inserted into the rotating frame (613). The end of the connecting shaft (614) is connected to a grinding drill bit (7). The connector (61) is provided with a first mating groove (611) and a second mating groove (612) spaced 90 degrees apart. The first mating groove (611) is connected to the connecting drill bit (7). The connectors (61) are fixedly installed together, the second mating groove (612) is rotatably installed between the connector (61), and a mating plug (615) is provided at the end of the connecting shaft (614) away from the grinding drill bit (7). When the first mating groove (611) and the mating plug (615) are mated together, the output shaft (50) and the grinding drill bit (7) are coaxially installed together. When the second mating groove (612) and the mating plug (615) are mated together, the output shaft (50) and the grinding drill bit (7) are installed perpendicularly. A drive assembly is provided between the output shaft (50) and the connecting shaft (614). A right-angle bracket two (64) is fixedly installed on the outer shell of the grinding motor (5). A snap ring (62) is rotatably installed on the connector (610). Limiting rings (66) are provided on both sides of the snap ring (62) on the connector (610). A right-angle bracket one (63) is provided on the snap ring (62). The adjacent sides of the right-angle bracket one (63) and the right-angle bracket two (64) are interlocked. A telescopic motor two (65) is provided between the right-angle bracket one (63) and the right-angle bracket two (64). The drive assembly includes a bevel gear one (60) coaxially mounted on the output shaft (50), and a bevel gear two (617) provided on the outer side of the connecting shaft (614). When the mating plug (615) and the second mating groove (612) are mated together, the bevel gear one (60) and the bevel gear two (617) mesh with each other. The connecting shaft (614) is fitted with an upper half-sleeve (620) and a lower half-sleeve (621) on its outer side. The upper half-sleeve (620) and the lower half-sleeve (621) are fixedly connected by bolts. Engagement grooves (622) are evenly distributed between the upper half-sleeve (620) and the lower half-sleeve (621). A mating block (6170) is provided on the inner side of the bevel gear (617) corresponding to the engagement groove (622). The mating block (6170) is slidably installed with the engagement groove (622). A support spring (623) is provided between the snap-fit ​​groove (622) and the mating block (6170). Connecting rods (619) are evenly arranged on the outer side of the connecting shaft (614). The connecting rods (619) are connected to the end face of the second bevel gear (617). A connecting frame (616) is provided between the rotating frame (613) and the lower half-sleeve (621). The connecting frame (616) is fixedly connected to the rotating frame (613). The connecting frame (616) is circumferentially snapped onto the outer surface of the lower half-sleeve (621).

2. A grinding device for a CNC machine tool according to claim 1, characterized in that, The mating plug (615) is equipped with an electromagnet, the first mating groove (611) and the second mating groove (612) are equipped with magnets, and the connector (61) and the rotating frame (613) are equipped with a rotating motor (618).

3. A grinding device for a CNC machine tool according to claim 1, characterized in that, One of the limiting rings (66) on one side is provided with an installation ring (67), and an adsorption iron block (68) is evenly distributed on the installation ring (67). An electromagnet (69) is provided on the right-angle bracket (63) at the position corresponding to the adsorption iron block (68).

4. A grinding device for a CNC machine tool according to claim 1, characterized in that, The second chuck (41) has a center frame (44) at its center, which is connected to the docking frame (42). The docking frame (42) has a telescopic motor (43) on its side, which is connected to the second chuck (41).

5. A grinding device for a CNC machine tool according to claim 4, characterized in that, The lifting mechanism (3) includes sliding guide rails (30) symmetrically arranged on the base. One end of the sliding guide rail (30) is fixedly connected to a plug-in frame (35). The plug-in frame (35) is plugged into the edge of the base (1). A bidirectional lead screw (32) is rotatably installed between the plug-in frames (35). The bidirectional lead screw (32) is connected to a drive motor (34). A snap-fit ​​slider (31) is provided on the bidirectional lead screw (32). The bottom of the snap-fit ​​slider (31) is slidably snapped into the sliding guide rail (30). A connecting frame (33) is rotatably installed between the upper side of the snap-fit ​​slider (31) and the central docking mechanism (4).

6. A grinding device for a CNC machine tool according to claim 1, characterized in that, The processing table (10) is provided with uniformly arranged fixing holes, and multiple fixing brackets (11) are distributed on the processing table (10).

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