TWM609624U - Replaceable cutting tool - Google Patents

Abstract

A replaceable cutting tool includes a tool holder and a tool head embedded in the tool holder. The arbor includes a arbor main body extending in the axial direction, and two convex blocks protruding from one end of the arbor main body at intervals. The main body of the shank has a first end surface in which the protrusions are arranged and formed in a ring shape, and an inner periphery that axially extends from the inner periphery of the first end surface and surrounds and defines a positioning groove located between the protrusions Torus. The cutter head includes an axially extending cutter head main body, and at least one protruding on one end of the cutter head main body, and used for being inserted into the positioning groove and capable of being closely attached to the inner ring surface to maintain concentric positioning Piece. The cutter head main body has a second end surface facing the first end surface and recessed to form two spaced grooves for embedding the convex blocks respectively, so that the cutter head and the cutter shaft can rotate in unison.

Description

Replacement cutting tools

The new model relates to a cutting tool, in particular to a replaceable cutting tool.

1 and 2, there is a conventional cutter head 11, which is adapted to be connected to a shank 13 through a screw 12. The shank 13 is recessed from the end surface to sequentially form an axially extending and cylindrical shape. A first through groove 131 connected with the first through groove 131 and a second through groove 132 with an outer diameter smaller than that of the first through groove 131, and a second through groove 132 connected with the second through groove 132 and with an inner diameter smaller than the second through groove 132, and used for the internal screw hole 133 for the screw 12 to be screwed. The cutter head 11 can be engaged with the cutter shaft 13 and is hollow to form an axially extending through hole 110 for the screw 12 to penetrate. The cutter head 11 includes a positioning portion 111 in a circular ring shape, a receiving portion 112 extending from one end of the positioning portion 111 in a direction away from the cutter shaft 13 and having an outer diameter larger than that of the positioning portion 111, and a receiving portion 112 surrounding One end of the receiving portion 112 forms a cutting portion 113 with several cutting edges 114 (FIG. 2 is omitted for simplified illustration).

The screw 12 is used to pass through the through hole 110 of the cutter head 11, and is screwed into the inner screw hole 133 of the cutter shaft 13, so that the cutter head 11 is detachably fixed on the cutter shaft 13, and follows the The cutter bar 13 rotates, thereby performing cutting operations through the blades 114. Furthermore, the positioning part 111 is engaged with the second through groove 132, and the receiving part 112 is engaged with the first through groove 131 through the mechanical mechanism, so as to reduce the size of the cutter head 11 and the cutter bar 13 The concentricity error between the two can avoid the deflection during processing, thereby maintaining the accuracy of processing.

However, in actual situations, the tool bit 11 itself has no thread and can be screwed on the tool shaft 13 or for the screw 12 to be screwed, and there is no fastening device for fixing. Therefore, when the tool bar 13 rotates at a high speed, there is a possibility of relative rotation between the tool head 11 and the tool bar 13, resulting in the tool bar 13 often being unable to drive the tool head 11 to rotate in real time, and often facing the tool bar 13 idling. And reduce the problem of cutting efficiency. Therefore, in the face of the above-mentioned shortcomings, it is necessary to find a solution.

Therefore, the object of the present invention is to provide a replaceable cutting tool that can maintain high concentricity and avoid idling.

Therefore, the replaceable cutting tool of the present invention includes a tool bar, a tool head detachably arranged on the tool bar, and a locking member penetrating the tool bar and the tool head. The knife bar includes a knife bar main body extending along an axis, and two convex blocks protruding from one end of the knife bar main body at intervals. The main body of the tool bar has a first end surface in which the protrusions are arranged and in a ring shape, and a first end surface extends along the axis from the inner periphery of the first end surface, and surrounds and defines a positioning groove located between the protrusions的内环面。 The inner ring surface. The cutter head includes a cutter head main body extending along the axis, at least one positioning block protruding from one end of the cutter head main body and used to be inserted into the positioning groove so as to be in close contact with the inner ring surface, and at least one positioning block The blade around the main body of the cutter head. The cutter head body has a second end surface facing the first end surface and recessed to form two spaced grooves for embedding the convex blocks. The locking member extends along the axis, and can pass through the cutter head and the cutter bar at the same time in the direction of the axis, so as to fix the cutter head on the cutter bar.

The effect of the present invention is that the at least one positioning block is closely attached to the inner ring surface, so that a high degree of concentricity can be maintained between the cutter bar and the cutter head without deflection, and the convex blocks are embedded in the By waiting for the structural mechanism in the groove, the cutter bar can drive the cutter head to rotate around the axis in real time to avoid idling, thereby improving the cutting efficiency.

Refer to Figures 3 to 5, which is an embodiment of the new alternative cutting tool, which includes a tool bar 2, a tool head 3 detachably disposed on the tool bar 2, and a tool bar 2 and The locking member 4 of the cutter head 3. Define an axis L1 extending up and down, a first reference line L2 perpendicular to the axis L1 and passing through the arbor 2 radially, a first reference line L2 perpendicular to the axis L1 and the first reference line L2 and passing through the arbor 2 radially Two reference lines L3 and a third reference line L4 perpendicular to the axis L1 and parallel to the first reference line L2 and passing through the cutter head 3 radially.

The arbor 2 includes a arbor main body 21 extending along the axis L1, and two protrusions 22 protruding from the end of the arbor main body 21 at intervals. The arbor main body 21 has a first end surface 211 in a ring shape for the projections 22 to be arranged, and an inner ring surface 212 extending from the inner periphery of the first end surface 211 along the axis L1 and surrounding the axis L1, And an inner screw surface 213 extending inward from the inner ring surface 212 along the axis L1 and surrounding the axis L1. Wherein, the inner ring surface 212 defines a cylindrical positioning groove 214 centered on the axis L1, and the inner screw surface 213 defines an inner screw communicating with the positioning groove 214 and having an inner diameter smaller than the positioning groove 214.孔215. The bumps 22 respectively extend from the outer periphery of the first end surface 211 along the first reference line L2 to be elongated, and are respectively located on both sides of the second reference line L3 and are symmetrically arranged in the positioning groove 214 beside. In addition, it should be noted that the tool bar 2 can be operated by a tool, and the axis L1 is used as a rotation axis to rotate.

The cutter head 3 includes a cutter head body 31 extending along the axis L1, two positioning blocks 32 protruding from one end of the cutter head body 31 and symmetrically located on both sides of the axis L1, and several positioning blocks 32 arranged at The cutter head body 31 has an outer peripheral wall and a cutter edge 33 for cutting. The bit body 31 has a second end surface 311 facing the first end surface 211 and in a ring shape, and an inner peripheral surface 312 extending from the inner periphery of the second end surface 311 along the axis L1 and surrounding the axis L1. The second end surface 311 is recessed inward to form two grooves that are spaced apart from each other and located on both sides of the axis L1, and extend along the third reference line L4 to form a long strip, and can respectively be used for the embedding of the protrusions 22 313. The inner peripheral surface 312 defines a first through hole 310 communicating with the grooves 313. The positioning blocks 32 are used to be inserted into the positioning slot 214 and are respectively arranged on both sides of the third reference line L4. Wherein, each positioning block 32 has a circular arc surface 321 that can be closely attached to the inner ring surface 212, and an arc surface 321 opposite to the circular arc surface 321 and spaced from another positioning block 32 to define a communicating first channel. The inner arc surface 322 of the second through hole 320 of the hole 310.

The locking member 4 extends along the axis L1 and can pass through the cutter head 3 and the cutter bar 2 along the direction of the axis L1 at the same time, so as to fix the cutter head 3 on the cutter bar 2. The locking member 4 includes a long rod portion 41 that can penetrate through the first through hole 310 and the second through hole 320, and an external thread extending from one end of the long rod portion 41 for screwing on The screw connection portion 42 of the inner screw hole 215.

In addition, it should be noted that the cutter head 3 can be adjusted according to different processing requirements and specifications. As shown in FIG. 3, when the size requirement of the cutter head 3 is large, the top of the cutter head body 31 is exposed on the blades 33, thereby enhancing the overall strength. As shown in FIG. 6, when the size requirement of the cutter head 3 is moderate, the blades 33 are arranged around the cutter head body 31 to achieve better space usage and save materials. As shown in FIG. 7, when the size requirement of the cutter head 3 is small, in order to avoid processing difficulties, two of the cutter edges 33 located on the third reference line L4 can respectively form an extension groove 330. Each extension groove 330 communicates with the corresponding groove 313, so that in actual manufacturing, it is only necessary to use a processing tool to cut out the grooves 313 and the extension grooves 330 along the third reference line L4. Then achieve the purpose of simplifying processing.

3 to 5 again, when assembling this embodiment, the second end surface 311 of the cutter head main body 31 is aligned with the first end surface 211 of the cutter bar main body 21, and the protrusions 22 are aligned respectively with the The groove 313 allows the cutter head 3 to be embedded in the cutter bar 2 along the direction of the axis L1, so that the positioning blocks 32 and the inner ring surface 212 are in close contact with each other. Then, the screw portion 42 of the locking member 4 passes through the first through hole 310, the second through hole 320 in sequence, and finally passes through the inner screw hole 215 to be screwed to the inner screw surface 213. , The cutter head 3 can be firmly positioned on the cutter bar 2 to complete the assembly operation. In particular, it should be noted that this embodiment can easily replace different types of the cutter head 3, such as milling cutters, reamers, reaming cutters, hobbing cutters, and other machining tools to meet different processing requirements or replace old ones. New, obtain higher applicability.

When the positioning blocks 32 are inserted into the positioning groove 214, since the arc surfaces 321 and the inner ring surface 212 are in close contact with each other, the tool shaft 2 and the tool head 3 can maintain a high concentricity. It can avoid the deflection during the processing operation, so as to maintain the accuracy of the processing. Furthermore, when the tool bar 2 rotates at a high speed, the protrusions 22 are respectively embedded in the grooves 313, so that the tool head 3 can be pushed to rotate in real time in the circumferential direction, thereby reducing the tool bar 2 The possibility of relative rotation with the cutter head 3 is used to prevent the cutter bar 2 from idling, thereby increasing the cutting efficiency.

5 again, because the first end surface 211 of the arbor main body 21 and the second end surface 311 of the cutter head main body 31 are in close contact with each other, and at the same time cooperate with the inner ring surface 212 of the arbor main body 21 and the positioning blocks 32 The arc surfaces 321 are closely attached to each other, so that the shank 2 and the tool head 3 have the effect of binding on both sides, and further avoids the phenomenon of deflection when the shank 2 rotates, thereby improving the cutting rigidity to meet The demand for high-speed machining.

In summary, the replacement cutting tool of the present invention allows the positioning blocks 32 to cooperate with the positioning grooves 214 so that the tool bar 2 and the tool head 3 can maintain a high degree of concentricity. In addition, the design in which the protrusions 22 are respectively engaged with the grooves 313 allows the cutter bar 2 to rotate in real time to drive the cutter head 3 to rotate together, so as to avoid idling, so it can indeed achieve the new cost purpose.

However, the above are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

2: Toolholder 21: The main body of the arbor 211: first end face 212: inner ring surface 213: Inner screw surface 214: positioning slot 215: Internal screw hole 22: bump 3: cutter head 31: The main body of the cutter head 310: first through hole 311: second end face 312: inner peripheral surface 313: Groove 32: positioning block 320: second through hole 321: arc surface 322: Inner Curved Surface 33: Blade 330: Extension slot 4: lock firmware 41: Long pole 42: Screw connection part L1: axis L2: The first reference line L3: Second reference line L4: Third reference line

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a perspective view illustrating a conventional cutter head; Figure 2 is an incomplete cross-sectional side view illustrating that the cutter head is set on a cutter bar; Figure 3 is an incomplete three-dimensional exploded view illustrating an embodiment of the new alternative cutting tool; Figure 4 is an incomplete side view illustrating the connection of a cutter bar and a cutter head in the direction of an axis in this embodiment; Figure 5 is an incomplete cross-sectional side view illustrating the combination of the tool bar, the tool head and a locking member of the embodiment; and Fig. 6 and Fig. 7 are both three-dimensional views, respectively illustrating different aspects of the cutter head.

2: Toolholder

21: Toolholder body

211: first end face

212: inner ring surface

213: Inner screw surface

214: positioning slot

215: Internal screw hole

22: bump

3: cutter head

31: The main body of the cutter head

311: second end face

313: Groove

32: positioning block

320: second through hole

321: arc surface

322: Inner Curved Surface

33: Blade

4: lock firmware

41: Long pole

42: Screw connection part

L2: The first reference line

L3: Second reference line

L4: Third reference line

Claims (10)

An alternative cutting tool, including: A shank includes a shank body extending along an axis, and two protrusions protruding from one end of the shank body at intervals, and the shank body has a first ring-shaped first for the protrusions to be provided. An end surface, and an inner ring surface extending along the axis from the inner periphery of the first end surface and surrounding and defining a positioning groove located between the protrusions; A cutter head is detachably arranged on the cutter shaft, and includes a cutter head body extending along the axis, at least one protruding on one end of the cutter head body and being inserted into the positioning groove so as to be able to face the inner ring surface A close-fitting positioning block, and at least one cutting edge arranged outside the main body of the cutter head. The main body of the cutter head has a concave surface facing the first end surface and recessed to form two spaced intervals for the embedding of the convex blocks. The second end face of the groove; and A locking member extends along the axis, and can pass through the cutter head and the cutter bar at the same time in the direction of the axis, so as to fix the cutter head on the cutter bar. The replaceable cutting tool according to claim 1, wherein the positioning groove is cylindrical, and the axis is the center line. The replaceable cutting tool according to claim 1, wherein the at least one positioning block has an arc surface for tightly contacting the inner ring surface. The replaceable cutting tool according to claim 1, wherein the tool head includes two positioning blocks symmetrically located on both sides of the axis. The replaceable cutting tool according to claim 4, wherein the second end surface is annular, and the tool head body further has a first through hole extending along the axis from the inner periphery of the second end surface and defining a first through hole around it The positioning blocks cooperate to define a second through hole communicating with the first through hole, and the locking member can extend through the first through hole and the second through hole. The replaceable cutting tool according to claim 5, wherein the grooves are elongated and communicate with the first through hole respectively, and each protrusion extends radially from the outer periphery of the first end surface to form a elongated shape. The replaceable cutting tool according to claim 6, wherein the protrusions are respectively symmetrically arranged on both sides of the positioning groove. The replaceable cutting tool according to claim 1, wherein the tool holder body further has an inner thread surface extending inwardly from the inner ring surface along the axis, and the inner thread surface defines a connecting groove and an inner thread surface. The diameter is smaller than the locating groove, and is used for the inner screw hole for screw connection of the locking member. The replaceable cutting tool according to claim 8, wherein the locking member includes a long rod portion, and a threaded connection extending from one end of the long rod portion and forming an external thread for screwing in the inner screw hole unit. The replaceable cutting tool according to claim 6, wherein the tool head includes a plurality of cutting edges, two of the cutting edges are respectively located outside one end of the grooves, and are respectively recessed to form an extension groove, and each extension The groove communicates with the corresponding groove.

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