Numerical control tool capable of being conveniently and rapidly replaced

Abstract

The utility model discloses a numerical control cutter convenient for quick cutter change, and relates to the technical field of numerical control milling cutters, the numerical control cutter comprises a cutter head and a cutter handle, the connecting end of the cutter handle is provided with a wedge-shaped groove, the cutter head is connected with the wedge-shaped groove through a wedge block fixed at the connecting end, the wedge-shaped groove and the wedge block are provided with pin holes, the cutter handle is internally provided with a guide groove, and the guide groove is connected with the wedge block. The tool bit and the tool handle are quickly positioned and butted through matching of the wedge-shaped groove and the wedge block, complex alignment operation is not needed, after the limiting pin is inserted into the pin hole, the relative position of the wedge block and the wedge-shaped groove can be locked, the tool bit is prevented from deviating or falling off in the cutting process, and the tool bit is prevented from being damaged. Meanwhile, the tool bit and the tool handle can be separated only by sliding the limiting pin during disassembly, the tool changing time is greatly shortened, the numerical control machining efficiency is improved, and the problem that the tool bit and the tool handle of an existing tool are in threaded connection, and the tool bit is troublesome to replace in the machining process is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control milling cutter technical field, concretely is a numerical control tool bit convenient to quick tool changing. BACKGROUND

[0002] Numerical control milling cutter is the high accuracy cutting tool of adaptation numerical control milling machine, core is used for processing plane, groove, complex curved surface and special-shaped profile, is the key tool of mechanical manufacturing, it is composed of cutter body (mostly alloy steel or hard alloy, ensure rigidity), cutter tooth (insert hard alloy or high speed steel, wear resistance impact resistance) and handle (standardized design, accurate docking machine tool spindle), according to the use division milling cutter (milling groove), face milling cutter (milling plane), ball head milling cutter (milling curved surface) etc.

[0003] Such as the utility model patent with the announcement number CN211638458U, discloses a numerical control milling cutter, including cutter head and handle, the handle includes handle body, rotating device and installation part, the handle body includes handle shell and first clamping piece, the handle shell opens downward and surrounds a cylindrical inner cavity, the first clamping piece is connected in the cavity bottom of the inner cavity, the rotating device is annular structure with internal thread, rotatably connected in the lower end of the handle shell, the cutter head and handle of the utility model can be split, and the function of quick splitting and connecting is realized through the connection of rotating device and connecting part structure, meanwhile, the utility model prevents the problem that milling cutter is easy to break by setting first clamping piece and first clamping groove.

[0004] However, the cutter head and handle of such tool adopt threaded connection, and it is more troublesome to replace the cutter head in the processing, and the fixed device is used in the split connection, once worn, the whole needs to be replaced, causing unnecessary waste. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a numerical control tool bit convenient to quick tool changing, which solves the technical problems that the cutter head and handle of the existing tool adopt threaded connection, it is more troublesome to replace the cutter head in the processing, and the fixed device is used in the split connection, once worn, the whole needs to be replaced, causing unnecessary waste.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: a numerical control tool bit convenient to quick tool changing, including cutter head and handle, the connecting end of the handle is provided with a wedge-shaped groove, the cutter head is connected with the wedge-shaped groove through the wedge block fixed in the connecting end, the wedge-shaped groove and the wedge block are both provided with a pin hole, a guide groove is opened in the handle, a limiting pin is slidably connected in the guide groove and inserted into the pin hole.

[0007] Preferably, a guide sleeve fixedly connected with the top of the guide groove is sleeved on the limiting pin, and a convex eave is fixedly installed on the connecting end of the limiting pin and the guide sleeve.

[0008] Preferably, a sliding groove communicated with the guide groove is formed in the outer wall surface of the tool shank, and a sliding block is fixedly installed on the outer wall surface of the limiting pin and slides in the sliding groove.

[0009] Preferably, a supporting table is fixedly installed on the outer wall of the tool shank, a limiting ring is fixedly installed on the supporting table, two slide sleeves capable of being spliced together are sleeved on the tool shank, and limiting grooves adapted to the sliding blocks are formed in the two slide sleeves.

[0010] Preferably, a positioning groove adapted to the limiting ring is formed in the lower end of each of the two slide sleeves.

[0011] Preferably, an auxiliary ring is fixedly installed on the outer wall surface of each of the two slide sleeves, a lock washer slidably connected with the slide sleeve is arranged on the auxiliary ring, and a threaded sleeve is threadedly connected with the top end of each of the two slide sleeves.

[0012] Preferably, the pin hole is formed with an assembly chamfer.

[0013] Beneficial effects

[0014] The utility model provides a numerical control tool bit convenient for quick tool changing has the following beneficial effects:

[0015] The wedge-shaped groove and the wedge block are matched to realize the quick positioning butt joint of the tool head and the tool shank, complex alignment operation is not needed, the relative position of the wedge block and the wedge-shaped groove can be locked after the limiting pin is inserted into the pin hole, the tool head is prevented from deviating or falling off in the cutting process, the tool head and the tool shank can be separated only by sliding the limiting pin when disassembling, the tool changing time is greatly shortened, the numerical control machining efficiency is improved, and the problems that the tool head and the tool shank of the existing tool bit are connected through threads and the tool head is more troublesome to replace in the machining process are solved.

[0016] The two slide sleeves are spliced to drive the sliding block to move, so that the limiting pin is inserted into or separated from the pin hole, the strength of the connecting part of the tool head and the tool shank is further enhanced through the two slide sleeves, and the problems that the connecting part of the existing tool bit is connected through a fixed device and needs to be replaced as a whole once the fixed device is worn, causing unnecessary waste are solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is a sectional view of Figure 1 ​

[0019] Figure 3 It is the structure schematic diagram of the cutter head of the utility model;

[0020] Figure 4 It is the structure schematic diagram of the limiting pin of the utility model.

[0021] In the drawing: 1, cutter head; 2, handle; 3, wedge-shaped groove; 4, wedge block; 5, pin hole; 6, guide groove; 7, limiting pin; 8, guide sleeve; 9, eaves; 10, return spring; 11, sliding slot; 12, sliding block; 13, support platform; 14, limiting ring; 15, sliding sleeve; 16, limiting groove; 17, positioning groove; 18, auxiliary ring; 19, lock washer; 20, screw sleeve; 21, assembly chamfer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0023] Please refer to Figures 1-4 A numerical control cutter convenient for quick tool changing, comprising a cutter head 1 and a handle 2, a wedge-shaped groove 3 is formed in the connecting end of the handle 2, the cutter head 1 is connected with the wedge-shaped groove 3 through a wedge block 4 fixedly connected with the connecting end, the wedge-shaped groove 3 and the wedge block 4 are both provided with a pin hole 5, a guide groove 6 is formed in the handle 2, and a limiting pin 7 inserted into the pin hole 5 is slidably connected in the guide groove 6.

[0024] Please refer to Figure 2 A guide sleeve 8 fixedly connected with the top of the guide groove 6 is sleeved on the limiting pin 7, a eaves 9 is fixedly installed at the connecting end of the limiting pin 7 and the guide sleeve 8, and a return spring 10 for continuously pushing the eaves 9 is arranged in the guide sleeve 8; when in use, the guide sleeve 8 provides accurate guidance for the sliding of the limiting pin 7, so that the limiting pin 7 cannot be inserted into the pin hole 5 due to deviation; the return spring 10 continuously applies downward pushing force to the limiting pin 7 through the eaves 9, so that the limiting pin 7 always maintains the state of being inserted into the pin hole 5, without the need for artificial continuous pressing, which not only guarantees the connection stability, but also simplifies the tool changing operation, and the locking can be released by only pulling the limiting pin 7 upward, and the limiting pin 7 is automatically reset after being loosened.

[0025] Please refer to Figure 4 A sliding slot 11 communicated with the guide groove 6 is formed in the outer wall surface of the handle 2, and a sliding block 12 slidably arranged in the sliding slot 11 is fixedly installed on the outer wall surface of the limiting pin 7; when in use, the sliding slot 11 provides a moving channel for the sliding block 12, and the limiting pin 7 is driven to slide along the guide groove 6 by means of the sliding block 12, so that the operation of the limiting pin 7 is more convenient without the need for deep operation in the guide groove 6.

[0026] Please refer to Figure 3The outer wall of the tool shank 2 is fixedly provided with a supporting table 13, the supporting table 13 is fixedly provided with a limiting ring 14, the tool shank 2 is sleeved with two slide sleeves 15 capable of being spliced together, and the two slide sleeves 15 are both provided with limiting grooves 16 matched with the slide blocks 12; in use, the two slide sleeves 15 can wrap the outer wall of the tool shank 2 after being spliced, and when the slide blocks 12 are clamped into the limiting grooves 16, the limiting pins 7 can be driven by the slide blocks 12 to move along the pin holes 5 by sliding the two slide sleeves 15 up and down along the outer wall of the tool shank 2.

[0027] Please refer to Figure 4 The lower ends of the two slide sleeves 15 are provided with positioning grooves 17 matched with the limiting ring 14; in use, when the two slide sleeves 15 are spliced and inserted into the limiting ring 14, the positions of the lower ends of the two slide sleeves 15 can be limited by the limiting ring 14, so that the slide sleeves 15 are prevented from sliding off along the axial direction of the tool shank 2 due to the centrifugal force when the tool shank 2 rotates, and the stability of the locking effect is ensured.

[0028] Please refer to Figure 4 The outer walls of the two slide sleeves 15 are both fixedly provided with auxiliary rings 18, the two auxiliary rings 18 are provided with anti-loosening washers 19 in sliding connection with the slide sleeves 15, and the top ends of the two slide sleeves 15 are threadedly connected with screw sleeves 20; in use, the positions of the upper ends of the two slide sleeves 15 are limited by the screw sleeves 20, so that the stability of the locking effect is further enhanced, the strength of the connection between the tool bit 1 and the tool shank 2 can be enhanced when the two slide sleeves 15 are locked, the anti-loosening washers 19 are clamped between the auxiliary rings 18 and the screw sleeves 20, the friction between the screw sleeves 20 and the slide sleeves 15 can be increased, and the screw sleeves 20 are prevented from loosening due to long-term vibration.

[0029] The pin hole 5 is provided with an assembly chamfer 21; in use, the assembly chamfer 21 can guide the limiting pin 7 to be quickly inserted into the pin hole 5, the jamming caused by the deviation of the alignment between the limiting pin 7 and the pin hole 5 is avoided, especially when the reset spring 10 pushes the limiting pin 7 to be automatically reset, the insertion resistance can be reduced, the smooth entry of the limiting pin 7 into the pin hole 5 is ensured, the smoothness of the tool changing operation is improved, and the edges of the limiting pin 7 or the pin hole 5 are prevented from being worn due to hard collision.

[0030] In example 1, the quick positioning and butt joint of the tool bit 1 and the tool shank 2 are realized by the cooperation of the wedge-shaped groove 3 and the wedge block 4, complex alignment operations are not needed, the relative positions of the wedge block 4 and the wedge-shaped groove 3 can be locked after the limiting pin 7 is inserted into the pin hole 5, the tool bit 1 is prevented from being deviated or falling off in the cutting process, the tool bit 1 and the tool shank 2 can be separated only by sliding the limiting pin 7 when being disassembled, the tool changing time is greatly shortened, and the numerical control machining efficiency is improved.

[0031] Specifically, when replacing the tool bit 1, slide the two sliding sleeves 15 upwards along the shank 2, and the two sliding sleeves 15 drive the limiting pin 7 to disengage from the pin hole 5 through the sliding block 12, at this time the old tool bit 1 can be removed along the wedge-shaped slot 3, then hold the new tool bit 1 by hand, align the wedge block 4 at the connecting end of the new tool bit 1 with the wedge-shaped slot 3 of the shank 2, insert along the wedge-shaped slot 3, and the wedge-shaped fitting realizes the preliminary positioning of the tool bit 1, without repeated calibration, when the pin hole 5 of the wedge block 4 is aligned with the pin hole 5 of the wedge-shaped slot 3, the operator releases the two sliding sleeves 15, the restoring spring 10 in the guide sleeve 8 releases the elastic force, pushes the connecting end of the limiting pin 7 to the eaves 9, and makes the limiting pin 7 slide downwards along the inner hole of the guide sleeve 8 and the guide groove 6 of the shank 2; the lower end of the limiting pin 7 is guided by the assembly chamfer 21 of the pin hole 5 and smoothly inserted into the pin hole 5, completing the locking of the tool bit 1 and the shank 2, at this time the restoring spring 10 is still slightly compressed, and the limiting pin 7 is continuously pushed by the eaves 9, preventing the limiting pin 7 from loosening.

[0032] In the embodiment, the two sliding sleeves 15 are combined to drive the sliding block 12 to move, thereby controlling the insertion and disengagement of the limiting pin 7 from the pin hole 5, and the two sliding sleeves 15 can further enhance the strength of the connection between the tool bit 1 and the shank 2.

[0033] Specifically, when installing the two sliding sleeves 15, first insert the screw sleeve 20 and the lock washer 19 into the shank 2, then insert the limiting groove 16 into the sliding block 12, and after complete insertion, realize the butt joint of the two sliding sleeves 15, at this time the two sliding sleeves 15 can drive the limiting pin 7 to move through the sliding block 12, when the two sliding sleeves 15 are butt jointed, the lock washer 19 is slid along the two sliding sleeves 15 to the auxiliary ring 18, then screw the screw sleeve 20 at the connecting end of the two sliding sleeves 15, the screw sleeve 20 moves downwards along the thread of the sliding sleeve 15, gradually compressing the lock washer 19; continue to rotate the screw sleeve 20 until it cannot be rotated, at this time the lock washer 19 is compressed, and the radial friction force is generated by the compression of the auxiliary ring 18 and the screw sleeve 20, preventing the screw sleeve 20 from loosening due to machining vibration, and at the same time the screw sleeve 20 applies downward pressure to the sliding sleeve 15, making the sliding sleeve 15 tightly fit the support table 13, enhancing the overall stability of the sliding sleeve 15. When heavy cutting, the two sliding sleeves 15 wrap the connection part of the shank 2 and the tool bit 1, and the rigid structure of the sliding sleeve 15 enhances the bending strength of the connection part, avoiding deformation of the tool bit 1 due to cutting force; the lock washer 19 continuously provides friction force to prevent the screw sleeve 20 from loosening.

[0034] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A quick-change tool for a numerical control machine, characterized by comprising: Including cutter head (1) and handle (2), the connecting end of the handle (2) is provided with a wedge-shaped groove (3), the cutter head (1) is connected with the wedge-shaped groove (3) through the wedge block (4) fixedly connected with the connecting end, the wedge-shaped groove (3) and the wedge block (4) are provided with a pin hole (5), the handle (2) is provided with a guide groove (6), the guide groove (6) is slidably connected with the limiting pin (7) inserted into the pin hole (5).

2. The quick-change tool according to claim 1, wherein The limiting pin (7) is sleeved with a guide sleeve (8) fixedly connected with the top of the guide groove (6), the connecting end of the limiting pin (7) and the guide sleeve (8) is fixedly installed with a convex eave (9), the guide sleeve (8) is provided with a reset spring (10) for continuously pushing the convex eave (9).

3. The quick-change tool according to claim 1, wherein The outer wall surface of the handle (2) is provided with a sliding groove (11) communicated with the guide groove (6), the outer wall surface of the limiting pin (7) is fixedly installed with a sliding block (12) sliding in the sliding groove (11).

4. The quick-change tool according to claim 3, wherein The outer wall of the handle (2) is fixedly installed with a supporting table (13), the supporting table (13) is fixedly installed with a limiting ring (14), the handle (2) is sleeved with two slide sleeves (15) capable of being spliced together, and the two slide sleeves (15) are provided with limiting grooves (16) matched with the sliding block (12).

5. The quick-change tool according to claim 4, wherein The lower end of the two slide sleeves (15) is provided with a positioning groove (17) inserted into the limiting ring (14).

6. The quick-change tool according to claim 4, wherein The outer wall surface of the two slide sleeves (15) is fixedly installed with an auxiliary ring (18), the two auxiliary rings (18) are provided with a lock washer (19) slidably connected with the slide sleeve (15), and the top of the two slide sleeves (15) is threadedly connected with a sleeve (20).

7. The quick-change tool according to claim 1, wherein The pin hole (5) is provided with an assembly chamfer (21).

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