TWM518124U - Improved shock absorbing structure for cutting tool - Google Patents

Description

Improved damping structure of cutting tools

This creation relates to a cutting tool, and in particular to an innovative structural type revealer with a damping function to improve machining accuracy.

Pressing, turning is a fairly common and common processing method in the technical field of conventional machining. It mainly uses the hardness difference between the blade edge and the workpiece to achieve the purpose of turning molding. Therefore, in the process of machining, the tool will inevitably produce vibration, especially when the blade is not sharp enough. Another type of tool that is prone to vibration is the use of a boring tool for turning in holes, especially deep hole machining. The reason is that, in general outer diameter cutting, almost the whole shank is clamped by the seat of the lathe, so the resistance arm of the tool is less likely to generate vibration. When using the boring tool, the length of the tool extending out of the tool holder must be greater than the depth of the machining hole. Therefore, the deeper the hole, the larger the resistance arm is, and the more severe the vibration is, the easier it is. Affect the smoothness and processing accuracy of the machined surface.

In view of the foregoing problems, although there is a conventional technique disclosed in the prior art, a damper is disposed in the cutter rod body, and the outer circumference of the damper is sleeved with a shock-absorbing washer, and each of the anti-vibration washers abuts against the side wall of the rod body. The shock absorbing structure type; however, in the prior art, when the tool body is vibrated by cutting, the vibration force is transmitted to the outer side wall edge of the entire tool body, and then transmitted to the inside. The shock-absorbing washer and the damper, in this process, since the entire outer side vibration of the tool rod body has been formed, relying solely on the shock-absorbing washer and the damper for damping is actually insufficient, and there is still room for further improvement.

Therefore, in view of the problems existing in the above-mentioned conventional processing tool damping structure, how to develop an innovative structure with more ideal and practicality, the relevant industry players must further strive to develop breakthrough goals and directions.

In view of this, the creator has been engaged in the manufacturing development and design experience of related products for many years. After the detailed design and careful evaluation of the above objectives, the creator will have a practical and practical creation.

The main purpose of this creation is to provide an improvement of the damping structure of the cutting tool. The technical problem to be solved is to develop a new type of cutting tool structure with more effective and practical functions. The goal is to make breakthroughs in innovation. The shock absorbing structure is disposed in a cutting tool structure, the cutting tool comprising a shank and a cutter head positioned in combination with the shank end.

The technical feature of the present invention is that the shock absorbing structure comprises: a hollow cavity, an inner space type extending inside the shank; and a central rod having an extended rod shape and including a head And a tail end, wherein the head end is coupled to the cutter head, and the tail end extends through the hollow cavity and is coupled to the shank; at least one shock absorbing block is received in the hollow cavity, and the shock absorbing block is cylindrical The shape includes a sleeve hole, the sleeve sleeve is disposed on the outer circumference of the center rod, and an annular spacer is disposed between the outer circumference of the shock block and the inner wall of the hollow cavity; and wherein the outer circumference of the center rod and the shock block An annular gap is disposed between the sleeve holes; wherein, the outer circumference of the center rod is further sleeved with a plurality of radial damping rubber rings, and the outer periphery of the radial damping rubber ring is elastically resisted by the shock absorbing block. Set of holes in the wall.

By the combination of the foregoing structures, according to the prior art, the vibration generated by the cutter head during the cutting process is first transmitted to the center rod to generate the first shock absorption and shock absorption effect, and then transmitted through the radial shock absorption. The rubber ring and the shock absorbing block are absorbed and restrained, thereby achieving excellent damping effect, thereby improving the processing stability of the cutting tool, and further improving the practical precision of the workpiece processing precision and the smoothness of the surface of the workpiece.

Please refer to Figures 1, 2 and 3 for a preferred embodiment of the improved shock absorbing structure of the cutting tool. However, these embodiments are for illustrative purposes only and are not limited by the structure in the patent application. .

The damping structure is disposed in a structure of a cutting tool 10, the cutting tool 10 includes a shank 11 and a cutter head 12 integrally disposed at an end of the shank 11; the damper structure includes: a hollow cavity 20, The inside of the shank 11 has an elongated inner space shape; a center rod 30 has an extended rod shape and includes a head end 31 and a tail end 32, wherein the head end 31 is coupled to the cutter head 12 and the tail end The end 32 extends through the hollow cavity 20 and is coupled to the shank 11 (Note: this example is attached to the inner end wall of the hollow cavity 20); at least one damper block 40 (this example is a single damper block 40) The embodiment is disposed in the hollow cavity 20, and the shock absorbing block 40 has a cylindrical shape and includes a sleeve hole 41. The sleeve hole 41 is sleeved on the outer circumference of the center rod 30, and the outer periphery of the damping block 40 An annular spacer 42 is disposed between the outer periphery of the center rod 30 and the through hole 41 of the damper block 40; and wherein the center rod is disposed between the outer circumference of the center rod 30 and the through hole 41 of the damper block 40; A plurality of radial damping rubber rings 60 are further disposed on the outer periphery of the casing 30, and the outer periphery of the radial damping rubber ring 60 is elastically abutted against the hole wall of the sleeve hole 41 of the damping block 40.

With the above-mentioned structural composition and technical features, the vibration generated by the cutter head 12 during the cutting process is transmitted to the center rod 30 to generate the first shock absorption and shock absorption effect, and then transmitted through the radial damping rubber ring 60. Absorbing and suppressing with the shock absorbing block 40, thereby achieving excellent shock absorption efficiency; and it is worth mentioning that the vibration force generated by the cutter head 12 in the present invention is directly transmitted to the center pole having a small cross-sectional area. 30. The center rod 30 is weaker than the structure of the shank 11 in terms of rigidity, but the shock absorbing effect is relatively better (because the elastic toughness is better). Therefore, the vibration force of the cutter head 12 is mainly caused by the center rod. 30 absorbs the shock absorption first, and then absorbs the shock absorption type design of the vibration of the center rod 30 by the radial damping rubber ring 60 and the shock absorbing block 40, which can make the shock absorption and shock absorption effects more significant and greatly improved.

As shown in the second, third, and fourth embodiments, the outer circumference of the center rod 30 may be formed with a plurality of annular grooves 33, and each of the annular grooves 33 is provided with a corresponding radial damping rubber ring 60, thereby avoiding the diameter. The unevenness of the force is generated by the displacement of the damping rubber ring 60.

As shown in FIG. 4, an oil gap 70 may be filled in the annular gap 50 provided between the outer periphery of the center rod 30 and the sleeve hole 41 of the damper block 40.

As shown in FIG. 3 , a front shock absorbing rubber pad 81 can be disposed between the damper block 40 and the cutter head 12 , and a rear end shock absorbing rubber can be disposed between the damper block 40 and the shank 11 . Pad 82.

As shown in Fig. 3, the center rod 30 can be set to a solid pole type. Alternatively, as shown in Fig. 5, the center rod 30B may be formed in a hollow tubular shape with a cutting fluid passage 34 formed therein.

Efficacy description: The "improvement of the shock absorbing structure of the cutting tool" disclosed in the present invention mainly includes an annular gap between the outer cavity of the hollow hole, the center rod, the shock absorbing block, and the outer circumference of the center rod and the wear hole of the shock absorbing block. The outer rod of the center rod is provided with a plurality of radial damping rubber rings, and the outer elastic elasticity of the radial damping rubber ring abuts against the innovative structural shape and technical features of the perforated hole wall of the damping block, so that the creation According to the conventional structure proposed in [Prior Art], the vibration generated by the cutter head during the cutting process is first transmitted to the center rod to generate the first shock absorption and shock absorption effect, and then transmitted through the radial damping rubber ring. It absorbs and suppresses with the shock absorbing block, and improves the processing stability of the cutting tool, thereby achieving the practical progress of improving the machining accuracy of the workpiece and the smoothness of the surface of the workpiece.

It should be further emphasized that compared with the conventional structure proposed in [Prior Art], the vibration force generated by the cutter head in this case is directly transmitted to the center rod with a small cross-sectional area, and the center rod is rigidly compared. It is weaker in the structure of the shank, but the shock absorbing effect is relatively better (because the elastic toughness is better). Therefore, the original vibration of the cutter head is mainly absorbed by the center rod, and then the radial damping rubber is used. The shock-absorbing design of the vibration of the center rod by the ring and the shock absorbing block will make the shock absorption and shock absorption effects more significant and greatly improved.

The disclosures of the above embodiments are used to specifically explain the present creation, and although the descriptions are made through specific terms, the scope of patents of the novel creation cannot be limited thereby; those skilled in the art can understand the spirit of the creation. Changes and modifications are made to the equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

10‧‧‧Cutting tools 11‧‧‧Knife 12‧‧‧Knife 20‧‧‧Cylinder 30,30B‧‧‧Center pole 31‧‧‧Head end 32‧‧‧End 33‧‧‧ Ring groove 34‧‧‧Cutting fluid channel 40‧‧‧Vibration block 41‧‧‧With sleeve hole 42‧‧‧Aperture spacer 50‧‧‧Aperture gap 60‧‧‧ Radial damping rubber ring 70‧‧‧ Oil 81‧‧‧ front shock-absorbing rubber pad 82‧‧‧ rear shock-absorbing rubber pad

Figure 1 is a combined perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded perspective view of a preferred embodiment of the present invention. Figure 3 is a cross-sectional view of the combination of the preferred embodiment of the present invention. Fig. 4 is a view showing an embodiment in which the annular gap of the present creation is filled with oil. Fig. 5 is a view showing an embodiment in which a cutting fluid passage is formed inside the center rod of the present invention.

10‧‧‧Cutting tools

11‧‧‧Knife

12‧‧‧ cutter head

20‧‧‧ hollow cavity

30‧‧‧ center pole

31‧‧‧ head end

32‧‧‧End

33‧‧‧ Ring groove

40‧‧‧Vibration block

41‧‧‧ wearing a hole

42‧‧‧ annular spacer

50‧‧‧ annular gap

60‧‧‧radial damping rubber ring

81‧‧‧ front shock absorption pad

82‧‧‧Back end shock absorption pad

Claims (6)

A shock absorbing structure of a cutting tool is provided in a cutting tool structure, the cutting tool includes a shank and a cutter head integrally disposed at an end of the shank; the shock absorbing structure comprises: a hollow a cavity, which is disposed in an inner shape of the elongated shape inside the shank; a central rod having an extended rod shape including a head end and a tail end, wherein the head end is coupled to the cutter head, and the tail end is worn Extending through the hollow cavity and connecting to the shank; at least one damper block is disposed in the hollow cavity, and the damper block is in a cylindrical shape and includes a through hole, the sleeve is placed on the outer periphery of the center rod And an annular space is formed between the outer periphery of the damper block and the inner wall of the hollow cavity; and wherein an annular gap is formed between the outer periphery of the center rod and the through hole of the damper block; The outer sleeve is provided with a plurality of radial damping rubber rings, and the outer periphery of the radial damping rubber ring is elastically abutted against the wall of the sliding hole of the damping block; thereby, the cutting head is generated during the cutting process. After the vibration is transmitted to the center rod, it is absorbed and suppressed through the radial damping rubber ring. The attainable damping effectiveness. The shock absorbing structure of the cutting tool according to claim 1, wherein the outer circumference of the center rod is formed with a plurality of ring grooves, and each ring groove is provided with a corresponding radial damping rubber ring. Avoid the uneven force of the radial damping rubber ring due to displacement. The shock absorbing structure of the cutting tool according to claim 2 is improved, wherein an annular gap is provided between the outer periphery of the center rod and the through hole of the damper block, and an oil is filled therein. The shock absorbing structure of the cutting tool according to claim 3 is improved, wherein a front shock absorbing rubber pad is arranged between the damper block and the cutter head, and a damper block and the shank are respectively provided with a Rear shock absorption pad. The shock absorbing structure of the cutting tool according to claim 4 is improved, wherein the center rod is set to a solid pole type. The shock absorbing structure of the cutting tool according to claim 4, wherein the center rod is formed in a hollow tubular shape and a cutting fluid passage is formed therein.