CN213729605U

CN213729605U - Cutter for milling semicircular key groove

Info

Publication number: CN213729605U
Application number: CN202022893770.7U
Authority: CN
Inventors: 何渭彬
Original assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Current assignee: TAIZHOU HONGXIN CRANKSHAFT CO Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-07-20
Anticipated expiration: 2030-12-04

Abstract

The utility model provides a cutter that milling semicircle keyway was used belongs to cutter technical field. It has solved the problem that the change speed is slow, the replacement cost is high. The cutter for milling the semicircular key groove comprises a cutter handle and a blade, wherein the peripheral surface of the blade is provided with a plurality of processing parts, the cutter handle sequentially comprises a connecting body, a guide matching head and a raised head from top to bottom, the top of the connecting body is provided with a connecting hole, the bottom of the raised head is provided with a mounting hole, the blade is provided with a central hole, and the blade and the cutter handle are fixed by penetrating through the central hole of the blade and penetrating into the mounting hole; the rod part of the fastening screw comprises a threaded section and a polished rod section, the rotating direction of the blade is opposite to the direction in which the threaded section is screwed out of the mounting hole when the cutter rotates to process, the blade is sleeved outside the polished rod section, right-angle notches I are symmetrically arranged between the lower end face and the outer peripheral face of the raised head, and a right-angle notch II is arranged between the lower end face and the outer peripheral face of the head of the fastening screw. The cutter for milling the semicircular key groove has the advantages that the blade is replaced without replacing the cutter handle, and therefore replacement cost is reduced.

Description

Cutter for milling semicircular key groove

Technical Field

The utility model belongs to the technical field of the cutter, a cutter that milling semicircle keyway was used is related to.

Background

In the existing mechanical processing, the semi-circular key groove is often required to be processed on a workpiece. Therefore, people design a special cutter for milling a semicircular key groove, which comprises a cutter handle and a blade, wherein the cutter handle and the blade are integrally formed, the cutter handle is in a straight cylinder shape, and a plurality of processing parts which are inclined along the same direction are arranged on the periphery of the blade. When the tool is used, the jacket is installed in the main shaft of the equipment, the tool shank is plugged into the jacket and then is tightly pressed by the screw to be fixed, the workpiece is fixed on one side of the blade through the clamp, and therefore when the main shaft of the equipment drives the tool to rotate, the semicircular key groove can be machined in the workpiece. The tool is passivated or damaged after being used for a long time, the tool needs to be replaced at the moment, and the tool handle and the blade are of an integrated structure, so that the tool handle can only be replaced integrally, but the tool handle is completely lossless in reality, and replacement cost is greatly increased. Moreover, the integral replacement also involves the disassembly and the re-fixation between the tool shank and the clamping sleeve, so the replacement speed is slow. In this case, the skilled person can easily think of the tool as a split connection, but a simple split connection is difficult to ensure the accuracy consistency in batch processing.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide the cutter that milling semicircle keyway was used, solved the problem that change speed is slow, change cost is high.

The purpose of the utility model can be realized by the following technical proposal:

the cutter for milling the semicircular key groove comprises a cutter handle and a blade connected to the lower end of the cutter handle, wherein the peripheral surface of the blade is provided with a plurality of processing parts which are in a toothed shape and incline towards the same direction; fastening screw's pole portion includes screw thread section and polished rod section from top to bottom, the direction of rotation of blade is opposite with the direction that the screw thread section revolves out the mounting hole when the cutter rotates to add man-hour, the blade cover is outside the polished rod section and the blade presss from both sides under the plush copper between terminal surface and fastening screw's the head up end, be connected through the parallel key transmission between polished rod section and the blade, equal symmetry is provided with right angle breach one between the lower terminal surface of plush copper and the outer peripheral face, the quantity of right angle breach one is two and the symmetry sets up, be equipped with right angle breach two between fastening screw's the head under terminal surface and the outer peripheral face, the quantity of right angle breach two is two and the symmetry sets up.

When the tool is installed, the connecting section of the tool shank is firstly plugged into a main shaft of the equipment and is in threaded connection with a blind rivet arranged in the main shaft through a connecting hole with internal threads at the top of the connecting section. Because the external diameter of the guide fitting head gradually increases from top to bottom and has a taper, and the maximum external diameter of the guide fitting head is larger than the external diameter of the connecting body, the axis of the tool holder and the axis of the spindle can be automatically aligned through the taper of the guide fitting head in the process that the tool holder continuously extends into the spindle. And then, a flat key is arranged on the polished rod section of the fastening screw, and the blade is sleeved on the polished rod section and is ensured to be embedded into a flat key groove I of the blade. The fastening screw is then threaded into the mounting hole in the bottom of the nose through the threaded section and the insert is clamped between the lower end face of the nose and the upper end face of the head of the fastening screw, thus forming a complete tool.

When the equipment main shaft drives the handle of a knife to rotate and carries out the man-hour of semicircle keyway, the blade is through the transmission of parallel key and synchronous rotation, because the blade rotation direction is opposite with the screw thread section back-out mounting hole's of fastening screw direction, consequently the cooperation between fastening screw and the mounting hole can be more and more tight on the contrary in the course of working, has improved the firm in connection nature between blade and the handle of a knife, has guaranteed the machining precision. The cutter for milling the semicircular key groove is in a mode that the blade and the cutter handle are fixed through the fastening screw, so that the blade can be replaced only by the processing part after passivation or damage occurs, the cutter handle does not need to be replaced, and the replacement cost is greatly reduced. Simultaneously, compare in changing whole cutter and need follow the main shaft in pull out, this cutter only need unscrew fastening screw when changing the blade can, consequently change speed also faster. And, adopt fastening screw and mounting hole complex mode for the staff can not destroy the screw thread part on the mounting hole when utilizing spanner centre gripping to carry out the installation of handle of a knife in right angle breach, no matter like this all obtain fine assurance to the fastness of being connected between blade and the handle of a knife or the axiality between blade and the handle of a knife.

In the cutter for milling the semicircular key groove, the blade is provided with the first flat key groove in a penetrating mode, the first flat key groove is communicated with the central hole of the blade, and the flat key is arranged on the side portion of the polished rod section and embedded into the first flat key groove.

In the cutter for milling the semicircular key groove, the side part of the polished rod section is provided with a flat key groove II, and the flat key part is embedded in the flat key groove II.

In the cutter for milling the semicircular key groove, the outer surface of the polished rod section is polished by a grinding machine, and the root part of the lower end of the polished rod section is provided with an annular tool withdrawal groove.

When processing man-hour, fix fastening screw on the grinding machine, then utilize the emery wheel on the grinding machine to polish the smooth rod section surface in order to improve the roughness of smooth rod section surface, the blade then forms through the finish machining, just so can guarantee the straightness that hangs down of blade assembly back and handle of a knife axis to guarantee the machining precision of semicircle keyway.

Compared with the prior art, the cutter for milling the semicircular key groove has the advantages that the mode that the blade and the cutter handle are fixed through the fastening screw is adopted, so that the blade can be replaced without replacing the cutter handle after passivation or damage occurs to the processing part, and the replacement cost is greatly reduced. Simultaneously, compare in changing whole cutter and need follow the main shaft in pull out, this cutter only need unscrew fastening screw when changing the blade can, consequently change speed also faster.

And the rotation direction of the blade during processing is set to be opposite to the direction of screwing the thread section of the fastening screw out of the mounting hole, so that the fastening screw and the mounting hole can be matched more and more tightly in the processing process, the connection firmness between the blade and the cutter handle is improved, and the processing precision is ensured.

Drawings

Fig. 1 is a schematic view of the present tool for milling semicircular key grooves.

Fig. 2 is a longitudinal sectional view of the present tool for milling semicircular key grooves.

Fig. 3 is another angular longitudinal cross-sectional view of the present tool for milling semicircular key grooves.

In the figure, 1, a knife handle; 1a, a connecting section; 1a1, connecting hole; 1b, guiding a matching head; 1c, a raised head; 1c1, mounting holes; 1c2, a first right-angle notch; 2. a blade; 2a, a processing part; 3. fastening screws; 3a, a thread section; 3b, a polished rod section; 3c, a right-angle notch II; 4. a flat bond.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, the cutter for milling the semicircular key groove includes a holder 1 and a blade 2 connected to a lower end of the holder 1, and the outer peripheral surface of the blade 2 has a plurality of tooth-shaped processing portions 2a inclined in the same direction. The tool holder 1 sequentially comprises a cylindrical connector 1a from top to bottom, a guide matching head 1b with the outer diameter gradually increased from top to bottom and a cylindrical raised head 1c, the maximum outer diameter of the guide matching head 1b is larger than the outer diameter of the connector 1a, a connecting hole 1a1 with internal threads is formed in the top of the connector 1a, a mounting hole 1c1 with internal threads is formed in the bottom of the raised head 1c, the blade 2 is provided with a central hole, and the blade 2 and the tool holder 1 are fixed through a fastening screw 3 which penetrates through the central hole of the blade 2 and penetrates into the mounting hole 1c1 to form threaded connection.

Further, the rod part of the fastening screw 3 comprises a threaded section 3a and a polished rod section 3b from top to bottom, the blade 2 is sleeved outside the polished rod section 3b and clamped between the lower end face of the raised head 1c and the upper end face of the head of the fastening screw 3, the polished rod section 3b is in transmission connection with the blade 2 through a flat key 4, and the rotating direction of the blade 2 is opposite to the direction in which the threaded section 3a is screwed out of the mounting hole 1c1 when the cutter rotates to process. The blade 2 is further provided with a first flat key groove in a penetrating mode, the first flat key groove is communicated with a central hole of the blade 2, and the flat key 4 is arranged on the side portion of the polished rod section 3b and is partially embedded into the first flat key groove. The side part of the polished rod section 3b is provided with a flat key groove II, and the flat key 4 is partially embedded in the flat key groove II. The outer surface of the polished rod section 3b is polished by the grinding machine to form, the lower end root of the polished rod section 3b is provided with an annular tool withdrawal groove, the fastening screw 3 is fixed on the grinding machine during machining, then the outer surface of the polished rod section 3b is polished by utilizing a grinding wheel on the grinding machine to improve the flatness of the surface of the polished rod section 3b, and the blade 2 is formed by finish machining, so that the perpendicularity between the assembled blade 2 and the axis of the tool holder 1 can be ensured, and the machining precision of the semicircular key groove is ensured. The lower end face and the outer peripheral face of the raised head 1c are symmetrically provided with two first right-angle notches 1c2, the number of the first right-angle notches 1c2 is two, the two first right-angle notches 3c are symmetrically arranged, the lower end face and the outer peripheral face of the head of the fastening screw 3 are provided with two second right-angle notches 3c, and the number of the second right-angle notches 3c is two, and the two second right-angle notches are symmetrically arranged.

During installation, the flat key 4 is firstly installed on the polished rod section 3b of the fastening screw 3, and then the blade 2 is sleeved on the polished rod section 3b and the flat key 4 is ensured to be embedded into the flat key groove I of the blade 2. Next, the fastening screw 3 is screwed into the mounting hole 1c1 in the bottom of the projection 1c through the threaded section 3a, and the insert 2 is sandwiched between the lower end face of the projection 1c and the upper end face of the head of the fastening screw 3, thus forming a complete tool. However, the connecting section of the tool holder 1 is plugged into the main shaft of the equipment, and is in threaded connection with the blind rivet arranged in the main shaft through the connecting hole 1a1 with the internal thread at the top of the connecting section. Because the outer diameter of the guide matching head 1b is gradually increased from top to bottom and has taper, and the maximum outer diameter of the guide matching head 1b is larger than the outer diameter of the connecting body 1a, the axis of the tool holder 1 and the axis of the spindle can be automatically guided through the taper of the guide matching head 1b in the process that the tool holder 1 continuously extends into the spindle. Of course, the tool shank 1 may be first mounted in the spindle of the apparatus, and then the blade 2 may be mounted on the tool shank 1.

When the equipment main shaft drives the handle of a knife 1 to rotate and carries out the processing of semicircle keyway, blade 2 is through the transmission of flat key 4 and synchronous rotation, because blade 2 direction of rotation is opposite with the direction that the screw thread section 3a of fastening screw 3 back-outs mounting hole 1c1, consequently the cooperation between fastening screw 3 and the mounting hole 1c1 can be more and more tight on the contrary in the course of working, has improved the firm in connection nature between blade 2 and the handle of a knife 1, has guaranteed the machining precision. This cutter that milling semicircle keyway was used sets up to blade 2 and handle of a knife 1 and passes through fastening screw 3 mode fixed mutually for blade 2 can only be changed and need not to change handle of a knife 1 after passivation or damage appear in processing portion 2a, has reduced the replacement cost from this widely. Meanwhile, compared with the situation that the whole cutter needs to be detached from the main shaft during replacement, the cutter only needs to unscrew the fastening screw 3 during replacement of the blade 2, and therefore the replacement speed is higher. And, adopt fastening screw 3 and mounting hole 1c1 complex mode for the staff can not destroy the screw thread part on mounting hole 1c1 when utilizing the spanner centre gripping to carry out the installation of handle of a knife 1 in right angle breach 1c2 department, no matter like this to the fastness of connection between blade 2 and the handle of a knife 1 or the axiality between blade 2 and the handle of a knife 1 has all obtained fine assurance.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A cutter for milling a semicircular key groove comprises a cutter handle (1) and a blade (2) connected to the lower end of the cutter handle (1), the peripheral surface of the blade (2) is provided with a plurality of processing parts (2a) which are in a tooth shape and incline towards the same direction, the novel screwdriver is characterized in that the screwdriver handle (1) sequentially comprises a cylindrical connector (1a), a guide matching head (1b) with the outer diameter gradually increasing from top to bottom and a cylindrical raised head (1c), the maximum outer diameter of the guide matching head (1b) is larger than the outer diameter of the connector (1a), a connecting hole (1a1) with internal threads is formed in the top of the connector (1a), a mounting hole (1c1) with the internal threads is formed in the bottom of the raised head (1c), the blade (2) is provided with a central hole, and the blade (2) and the screwdriver handle (1) are fixed through a fastening screw (3) which penetrates through the central hole of the blade (2) and penetrates into the mounting hole (1c1) to form threaded connection; the cutter rotates to process, the rotating direction of the blade (2) is opposite to the direction in which the threaded section (3a) is screwed out of the mounting hole (1c1), the blade (2) is sleeved outside the polished rod section (3b), the blade (2) is clamped between the lower end face of the raised head (1c) and the upper end face of the head of the fastening screw (3), the polished rod section (3b) is in transmission connection with the blade (2) through a flat key (4), right-angle notches I (1c2) are symmetrically arranged between the lower end face and the outer peripheral face of the raised head (1c), the number of the right-angle notches I (1c2) is two and symmetrically arranged, right-angle notches II (3c) are arranged between the lower end face of the head of the fastening screw (3) and the outer peripheral face, and the number of the right-angle notches II (3c) is two and symmetrically arranged.

2. The cutter for milling the semicircular key groove as claimed in claim 1, wherein a first flat key groove is arranged on the blade (2) in a penetrating manner, the first flat key groove is communicated with the central hole of the blade (2), and a flat key (4) is arranged on the side of the polished rod section (3b) and is embedded in the first flat key groove.

3. The cutter for milling the semicircular key groove as claimed in claim 2, wherein the side part of the polished rod section (3b) is provided with a flat key groove II, and the flat key (4) is partially embedded in the flat key groove II.

4. The tool for milling the semicircular key groove as set forth in claim 1, 2 or 3, wherein the outer surface of the polished rod section (3b) is ground by a grinding machine, and the lower end root of the polished rod section (3b) is provided with an annular relief groove.