Numerical control machining center with quick change drill head

Abstract

The application relates to the field of workpiece machining equipment, in particular to a numerical control machining center capable of rapidly switching drill bits, which comprises a lathe body, a fixed frame arranged in a slide plate box of the lathe body and synchronously moving, a tool changing ring rotationally connected to the fixed frame and having a rotation axis consistent with the moving direction of the fixed frame, a tool changing motor arranged in the fixed frame and driving the tool changing ring to rotate, a plurality of drill bits uniformly arranged on the outer circular surface of the tool changing ring and capable of machining workpieces, a plurality of sleeve shafts rotationally connected to the inner circular surface of the tool changing ring and one-to-one corresponding to all the drill bits, a power motor arranged in the fixed frame and capable of driving a corresponding sleeve shaft to rotate, a plurality of vertical bevel gears rotationally connected to the tool changing ring and one-to-one corresponding to all the sleeve shafts and driven to rotate by the sleeve shafts, and a plurality of flat bevel gears rotationally connected to the tool changing ring and one-to-one engaged with all the vertical bevel gears, each flat bevel gear can drive a drill bit to rotate, so that the lathe can also be modified to adapt to rapid switching of drill bits.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of workpiece machining equipment, in particular to a numerical control machining center capable of quickly switching drill bits. BACKGROUND

[0002] Metal workpieces need to use molds during stamping and other processing steps to shape the workpieces into the required shape. In order to obtain the mold, a high-precision device, such as a numerical control machining center, is needed to manufacture the machining mold. The conventional machining center can only use a single drill bit during each processing, and the drill bit needs to be replaced manually after the machining center is stopped. To solve this problem, a machining center capable of quickly switching drill bits is needed.

[0003] For example, the existing production line for part mold machining and its machining process disclosed in CN113001196A has multiple drill bits arranged on a rotatable mounting frame. After the output shaft of the driving motor is driven by the cylinder to move away from the corresponding rotating head, the mounting frame can be rotated to quickly replace the drill bits.

[0004] In view of the related technology in the above, the mounting frame is vertical, so that the processing drill bit is also vertical, which is suitable for planing, milling, and drilling on the upper surface of the workpiece. However, in the case of lathe processing, which requires turning the vertical side surface of the workpiece, if the mounting frame is placed flat to improve the installation of the corresponding lathe equipment, it will occupy more space in the horizontal plane, which will greatly affect the movement stroke of the drill bit, and the type of workpiece processing will be severely limited, making it difficult to adapt to the quick switching and modification of the drill bit. SUMMARY

[0005] In order to adapt to the quick switching and modification of the drill bit for the lathe, the present application provides a numerical control machining center capable of quickly switching drill bits.

[0006] The numerical control machining center capable of quickly switching drill bits provided by the present application adopts the following technical solution.

[0007] A numerical control machining center capable of quickly switching drill bits, comprising a lathe main body, a fixed frame arranged in the lathe main body apron box and moving synchronously, a tool changing ring rotatably connected to the fixed frame and having a rotation axis consistent with the moving direction of the fixed frame, a tool changing motor arranged in the fixed frame and driving the tool changing ring to rotate, a plurality of drill bits uniformly arranged on the outer circular surface of the tool changing ring and capable of processing workpieces, a plurality of sleeve shafts rotatably connected to the inner circular surface of the tool changing ring and corresponding to all the drill bits, a power motor arranged in the fixed frame and capable of driving a corresponding sleeve shaft to rotate, a plurality of vertical bevel gears rotatably connected to the tool changing ring and driven to rotate by all the sleeve shafts, and a plurality of flat bevel gears rotatably connected to the tool changing ring and meshing with all the vertical bevel gears, each flat bevel gear being capable of driving a corresponding drill bit to rotate.

[0008] By adopting the technical scheme, the power output direction of the power motor output shaft can be changed from the vertical plane to the horizontal plane, the fixed frame and the tool changing ring can be kept in the vertical installation state, so that the quick tool changing modification of the lathe can be realized, and the stroke of the slide box of the lathe is not easily affected.

[0009] Optionally, the fixed frame is detachably connected to the lathe body, the tool changing ring comprises a main ring provided with the shaft sleeves and rotatably connected to the fixed frame, a split ring provided with the vertical bevel gears and the flat bevel gears and detachably connected to the main ring, a plurality of flat inserts rotatably connected to the split ring and coaxially fixedly connected to all the vertical bevel gears, and a plurality of vertical sleeves rotatably connected to the main ring and coaxially fixedly connected to all the shaft sleeves, each flat insert can be inserted into a corresponding vertical sleeve along the main ring rotation axis, and the cross section of the flat insert is rectangular.

[0010] By adopting the technical scheme, the fixed frame can be detachably installed on the corresponding lathe or milling machine or drilling machine according to the needs, the split ring can be detached from the main ring, and the modification for different equipment can be realized, so that the application range is wider.

[0011] Optionally, the split ring is rotatably connected to a plurality of flat sleeves coaxially fixedly connected to all the flat bevel gears, the drill bit can be inserted into a corresponding flat sleeve along the radial direction of the main ring or inserted into a corresponding vertical sleeve along the axial direction of the main ring, and the flat sleeve and the vertical sleeve can be detachably connected to the tool fixing block for fastening the drill bit.

[0012] By adopting the technical scheme, the drill bit corresponding to the flat sleeve and the vertical sleeve can be installed similarly, so that the same specification drill bit can be used for installation in different use cases.

[0013] Optionally, the abutting position of the tool fixing block and the drill bit is formed with a pressure inclined surface, and the tool fixing block can be inserted into the flat sleeve and the vertical sleeve.

[0014] By adopting the technical scheme, the tool fixing block can conveniently and stably fix the drill bit.

[0015] Optionally, the inner circle of the split ring is fixedly connected with a positioning strip which can be inserted into the outer circle of the main ring along the axial direction of the main ring.

[0016] By adopting the technical scheme, the split ring can be accurately matched with the main ring, and the split ring does not need to be rotated and adjusted after being sleeved on the main ring.

[0017] Optionally, the outer circle of the main ring is fixedly connected with a circumferential piece which can abut against and detachably connect to the end surface of the split ring.

[0018] By adopting the above technical solution, the axial force borne by the split ring can be distributed to a portion of the ring circumferential piece, so that the flat insert and the vertical assembly are less likely to bear excessive horizontal force.

[0019] Optionally, the fixed frame is equipped with a tool changing electric cylinder that drives the power motor to move. The output shaft of the power motor is coaxially fixedly connected to an output shaft sleeve. The output shaft sleeve is slidably connected to a plug that can be inserted into the shaft. The plug can rotate synchronously with the output shaft sleeve. The output shaft sleeve is provided with a plug spring that allows the plug to be inserted into the shaft. The output shaft sleeve is detachably connected to an anti-detachment block that can prevent the plug from detaching from the output shaft sleeve.

[0020] By adopting the above technical solution, even if the plug cannot be aligned with the sleeve shaft and inserted smoothly when the power motor moves toward the corresponding sleeve shaft, the plug can still be rotated to retract into the output shaft sleeve. It is not necessary to completely align the sleeve shaft and the plug before the power motor moves, which makes it easier to quickly change drill bits during the processing and helps to improve processing efficiency.

[0021] Optionally, the output shaft of the power motor is coaxially fixedly connected to an inner rod located inside the output shaft sleeve, and the inner rod is inserted into the plug.

[0022] By adopting the above technical solution, the inner rod of the sleeve can also drive the insert to rotate synchronously during drill bit processing, making it less likely for the output shaft sleeve and the insert to withstand large torsional forces.

[0023] Optionally, ladder blocks are fixedly connected to all four sides of the flat plug-in, and the width of the ladder blocks is smaller the further away from the flat plug-in they are connected to.

[0024] By adopting the above technical solution, the flat insert can be more easily and completely inserted into the vertical kit, so as to make a detachable connection between the split ring and the main ring.

[0025] Optionally, the outer circle of the main ring is provided with an outer circle magnet, and a positioning magnet that can be close to the outer circle magnet can be detachably connected to the side of the vertical assembly away from the opening of the flat plug.

[0026] By adopting the above technical solution, when the opening of the vertical component faces the flat insert, the positioning magnet can approach the outer circular magnet for attraction, so that the vertical component is less likely to rotate at this time, so that the flat insert can be inserted into the vertical component.

[0027] In summary, this application includes at least one of the following beneficial effects:

[0028] 1. The lathe can be modified to perform quick tool changes without significantly affecting the travel of the lathe's apron.

[0029] 2. The sleeve shaft and the insert need not be completely aligned before the power motor moves, which facilitates quick replacement of drill bits during processing and improves processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the main structure of the present application;

[0031] Figure 2 is a schematic diagram of the structure at the side of the main ring facing the fixed frame;

[0032] Figure 3 is a schematic diagram of the structure of the main ring, the split ring and the output shaft sleeve in cross section;

[0033] Figure 4 is Figure 3 an enlarged view of A in

[0034] Figure 5 is Figure 3 an enlarged view of B in

[0035] Figure 6 is a schematic diagram of the top view structure of the flat insert, the vertical sleeve, the positioning magnet and the outer circular magnet.

[0036] BRIEF DESCRIPTION OF DRAWINGS 1. lathe main body; 2. fixed frame; 3. tool changing ring; 31. inner sleeve rod; 32. ladder block; 33. outer circular magnet; 34. positioning magnet; 35. ring gear; 36. motor gear; 37. end block; 38. ring circumference port; 4. drill bit; 41. tool fixing block; 42. pressure inclined surface; 43. positioning bar; 44. ring circumference piece; 45. tool changing electric cylinder; 46. output shaft sleeve; 47. insert; 48. insert spring; 49. anti-dropping block; 5. sleeve shaft; 51. vertical bevel gear; 52. flat bevel gear; 53. power motor; 54. tool changing motor; 55. main ring; 56. split ring; 57. flat insert; 58. vertical sleeve; 59. flat sleeve. DETAILED DESCRIPTION

[0037] The present application will be further described in detail below with reference to the accompanying drawings.

[0038] The present application discloses a numerical control machining center for quickly switching drill bits, which is referred to Figure 1 and Figure 2The utility model provides a vertical type multi -purpose drill head, including lathe body 1, the detachable connection of lathe body 1's slide plate box has the fixed frame 2 that presents vertical, fixed frame 2 rotatoryly connected with the tool changing ring 3, the tool changing ring 3 rotation axis and lathe body 1's slide plate box moving direction are identical, the tool changing ring 3 is installed with several drill bits 4 around oneself rotation axis, fixed frame 2 is installed with the tool changing motor 54 that can make the tool changing ring 3 rotate and the power motor 53 that drives the rotation of the drill bit 4 of lowest height, make when needing to change drill bit 4, the tool changing ring 3 rotates under the driving of tool changing motor 54, make the drill bit 4 of needing to use rotate to the lowest point of tool changing ring 3, then power motor 53 drives the drill bit 4 of replacement to rotate.

[0039] Referring to Figure 2 and Figure 3 The tool changing ring 3 includes a main ring 55 rotatably connected to the fixed frame 2 and a split ring 56 coaxially sleeved on the main ring 55. The circumferential inner ring of the main ring 55 is coaxially fixedly connected with a ring gear 35. The output shaft of the tool changing motor 54 is coaxially fixedly connected with a motor gear 36 engaged with the ring gear 35, so that the main ring 55 rotates smoothly. The inner surface of the split ring 56 is uniformly fixedly connected with a plurality of positioning bars 43 around the axis thereof. The positioning bars 43 are inserted into the main ring 55 along the axis of the split ring 56. The circumferential inner wall of the main ring 55 is rotatably connected with a sleeve shaft 5 corresponding to each drill bit 4. The rotation axis of the sleeve shaft 5 passes through the axis of the main ring 55. The axis of the sleeve shaft 5 with the lowest height is consistent with the axis of the power motor 53. The power motor 53 is slidingly connected to the fixed frame 2 in the vertical direction. The fixed frame 2 is fixedly connected with a tool changing cylinder 45 capable of driving the power motor 53 to move vertically.

[0040] Referring to Figure 3 and Figure 4 The output shaft of the power motor 53 is coaxially fixedly connected with an output shaft sleeve 46. The bottom end of the output shaft sleeve 46 is coaxially sleeved with an insert 47. The horizontal cross section of the insert 47 is rectangular. The bottom end of the insert 47 can be inserted into the sleeve shaft 5 with the lowest height. The output shaft sleeve 46 is internally provided with an insert spring 48 forcing the insert 47 to move downward. The opposite sides of the insert 47 are integrally formed with end blocks 37. The bottom end of the output shaft sleeve 46 is fixedly connected with anti-disengagement blocks 49 on the opposite sides of the opening. The lower surface of the end block 37 can abut against the upper surface of the anti-disengagement block 49, so that the insert 47 is not easy to disengage from the output shaft sleeve 46. When the insert 47 approaches the upper surface of the sleeve shaft 5, the insert 47 is not necessarily aligned with the rectangular opening of the sleeve shaft 5. Therefore, when the insert 47 abuts against the upper surface of the sleeve shaft 5 and the insert spring 48 is compressed, the power motor 53 remains working to slowly rotate the insert 47 around its center line, so that the insert 47 can be smoothly inserted into the sleeve shaft 5. At the same time, the output shaft of the power motor 53 is coaxially fixedly connected with a sleeve inner rod 31 inserted into the insert 47, so that the sleeve inner rod 31 and the sleeve shaft 5 synchronously drive the insert 47 to rotate.

[0041] Referring to Figure 3 and Figure 5 , the circumferential outer wall of the main ring 55 is rotationally connected with a vertical sleeve 58 corresponding to each sleeve shaft 5, and each vertical sleeve 58 is coaxially fixedly connected to the corresponding sleeve shaft 5. The vertical sleeve 58 is in a rectangular shape, and the circumferential outer wall of the split ring 56 is provided with a circumferential opening 38 corresponding to each vertical sleeve 58, and the circumferential opening 38 penetrates the end face of the split ring 56 away from the main shaft of the lathe body 1. The circumferential outer wall of the main ring 55 is uniformly coaxially fixedly connected with a plurality of circumferential pieces 44 at the end away from the main shaft of the lathe body 1, the circumferential pieces 44 abut and are detachably connected to the split ring 56 by bolts, and there is a circumferential opening 38 between the adjacent two circumferential pieces 44.

[0042] Referring to Figure 5 and Figure 6 , each circumferential opening 38 is rotationally connected with a flat insert 57, the flat insert 57 is in a rectangular shape, and the vertical sleeve 58 is provided with an opening on one of the four surfaces around its own rotation axis to allow the flat insert 57 to be inserted into the vertical sleeve 58 along the axis direction of the split ring 56. The vertical sleeve 58 is fixedly connected with a positioning magnet 34 at the side away from the opening for inserting the flat insert 57, and the circumferential outer wall of the main ring 55 is detachably connected with an outer circular magnet 33 corresponding to each vertical sleeve 58, when the side of the vertical sleeve 58 provided with the positioning magnet 34 is rotated away from the main shaft of the lathe body 1, at this time the positioning magnet 34 can be adsorbed to the outer circular magnet 33, so that when the split ring 56 is sleeved on the main ring 55 at the end of the main ring 55 close to the main shaft of the lathe body 1, the opening of the vertical sleeve 58 for inserting the flat insert 57 can face the flat insert 57. Each flat insert 57 is fixedly connected with a ladder block 32 around the four surfaces of its own rotation axis, the cross section of the ladder block 32 is in the shape of an isosceles trapezoid, and the width of the ladder block 32 away from the end of the connected flat insert 57 is smaller, so that the flat insert 57 can more conveniently enter into the vertical sleeve 58.

[0043] Referring to Figure 5 , the split ring 56 is rotationally connected with a vertical bevel gear 51 corresponding to each flat insert 57, and each vertical bevel gear 51 is coaxially fixedly connected to the corresponding flat insert 57. Each vertical bevel gear 51 is engaged with a flat bevel gear 52, the rotation axis direction of the flat bevel gear 52 is consistent with the axis direction of the split ring 56, and each flat bevel gear 52 is coaxially fixedly connected with a flat sleeve 59, the flat sleeve 59 is rotationally connected to the end face of the split ring 56 away from the circumferential piece 44, and the flat sleeve 59 and the vertical sleeve 58 are consistent in structure, except that the length direction is different. Each flat sleeve 59 can be inserted into the split ring 56 radially with a corresponding drill bit 4, and the flat sleeve 59 is sleeved with a fixed tool block 41 that can abut the drill bit 4, the fixed tool block 41 is detachably connected to the flat sleeve 59 by bolts, and the side surface of the fixed tool block 41 and the drill bit 4 in contact is shaped as a pressure inclined surface 42, so that the fixed tool block 41 can more stably press the drill bit 4.

[0044] The vertical sleeve 58 can also be used for the drill bit 4 and the fixed tool block 41 to be put in, so that after the fixed frame 2 is disassembled from the lathe body 1, the split ring 56 is disassembled, and the drill bit 4 is fastened and installed corresponding to the vertical sleeve 58, which can be applied to the planing and milling drilling equipment which needs the drill bit 4 to be in a vertical working state.

[0045] The implementation principle of the numerical control machining center for quickly switching the drill bit according to the embodiment of the application is that the power motor 53 is connected with the external power supply to make the output shaft sleeve 46, the plug-in part 47, the sleeve shaft 5, the vertical sleeve 58, the flat plug-in part 57, the vertical bevel gear 51, the flat bevel gear 52, the flat sleeve 59 and the drill bit 4 rotate in sequence, so that the rotating axis direction of the drill bit 4 is consistent with the main shaft axis direction of the lathe body 1, so as to perform the modification of the quick switching of the drill bit 4 on the lathe body 1.

[0046] The above are the preferred embodiments of the application, which do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A CNC machining center with quick change of drill head, characterized by: The lathe comprises a lathe body (1), a fixed frame (2) arranged on the apron box of the lathe body (1) and moving synchronously, a tool changing ring (3) rotationally connected to the fixed frame (2) and having the same moving direction as the fixed frame (2), a tool changing motor (54) arranged on the fixed frame (2) and driving the tool changing ring (3) to rotate, a plurality of drill bits (4) uniformly arranged on the outer surface of the tool changing ring (3) and capable of machining workpieces, a plurality of sleeve shafts (5) rotationally connected to the inner surface of the tool changing ring (3) and corresponding to all the drill bits (4), a power motor (53) arranged on the fixed frame (2) and capable of driving a corresponding sleeve shaft (5) to rotate, a plurality of vertical bevel gears (51) rotationally connected to the tool changing ring (3) and corresponding to all the sleeve shafts (5), and a plurality of flat bevel gears (52) rotationally connected to the tool changing ring (3) and corresponding to all the vertical bevel gears (51), each flat bevel gear (52) being capable of driving a corresponding drill bit (4) to rotate. The fixed frame (2) is detachably connected to the lathe body (1), the tool changing ring (3) comprises a main ring (55) rotationally connected to the fixed frame (2) and provided with the sleeve shafts (5), and a split ring (56) detachably connected to the main ring (55) and provided with the vertical bevel gears (51) and the flat bevel gears (52), the split ring (56) is rotationally connected with a plurality of flat inserts (57) corresponding to and coaxially fixedly connected to all the vertical bevel gears (51), the main ring (55) is rotationally connected with a plurality of vertical sleeves (58) corresponding to and coaxially fixedly connected to all the sleeve shafts (5), each flat insert (57) is capable of being inserted into a corresponding vertical sleeve (58) along the rotational axis direction of the main ring (55), and the cross section of the flat insert (57) is rectangular.

2. The CNC machine center for quick change of drills according to claim 1, characterized in that: The split ring (56) is rotationally connected with a plurality of flat sleeves (59) corresponding to and coaxially fixedly connected to all the flat bevel gears (52), the drill bit (4) is capable of being inserted into a corresponding flat sleeve (59) along the radial direction of the main ring (55) or being inserted into a corresponding vertical sleeve (58) along the axial direction of the main ring (55), and the flat sleeve (59) and the vertical sleeve (58) are capable of detachably connected with a tool clamping block (41) for clamping the drill bit (4).

3. A CNC machine center for quick change of drills according to claim 2, characterized in that: The tool clamping block (41) and the drill bit (4) are formed with a pressure inclined surface (42) at the abutting position, and the tool clamping block (41) is capable of being inserted into the flat sleeve (59) and the vertical sleeve (58).

4. The CNC machine center for quick change of drills according to claim 1, characterized in that: The inner circle of the split ring (56) is fixedly connected with a positioning strip (43) capable of being inserted into the outer circle of the main ring (55) along the axial direction of the main ring (55).

5. The CNC machine center for quick change of drills according to claim 1, characterized in that: The outer circle of the main ring (55) is fixedly connected with a circumferential piece (44) capable of abutting and detachably connected to the end surface of the split ring (56).

6. The CNC machine center for quick change of drills according to claim 1, characterized in that: The fixed frame (2) is provided with a tool changing electric cylinder (45) for moving a power motor (53), the output shaft of the power motor (53) is coaxially fixedly connected with an output shaft sleeve (46), the output shaft sleeve (46) is slidably connected with an insert (47) which can be inserted into the sleeve shaft (5), the insert (47) can rotate synchronously with the output shaft sleeve (46), the output shaft sleeve (46) is provided with an insert spring (48) for inserting the insert (47) into the sleeve shaft (5), and the output shaft sleeve (46) is detachably connected with an anti-disengagement block (49) for limiting the disengagement of the insert (47) from the output shaft sleeve (46).

7. A CNC machine center for quick change of drills according to claim 6, characterized in that: The power motor (53) is coaxially fixedly connected with a sleeve-in-rod (31) located in the output shaft sleeve (46), and the sleeve-in-rod (31) is inserted into the insert (47).

8. The CNC machine center for quick change of drills according to claim 1, characterized in that: The four peripheral sides of the flat insert (57) are fixedly connected with ladder blocks (32), and the farther the ladder block (32) is from the side of the connected flat insert (57), the smaller the width of the ladder block (32).

9. A CNC machine center for quick change of drills according to claim 8, characterized in that: The outer circle of the main body ring (55) is provided with an outer circle magnet (33), and the side of the vertical sleeve (58) away from the opening for the flat insert (57) is detachably connected with a positioning magnet (34) which can be close to the outer circle magnet (33).

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