Shockproof knife bar

Abstract

The application provides a shockproof tool bar, which comprises an inner hole tool sleeve, a cylindrical tool bar and a circular shockproof tension cover plate, the inner hole tool sleeve is provided with a circular through hole, the tool bar comprises a tool bar main body for installing a tool and a tool bar tail for installing the tool bar, the diameter of the tool bar tail is smaller than that of the tool bar main body, a tool bar limiting end face is arranged between the tool bar tail and the tool bar main body, the two ends of the through hole of the inner hole tool sleeve are a head end and a tail end respectively, the tool bar tail is inserted into the through hole of the inner hole tool sleeve from the head end of the through hole of the inner hole tool sleeve, and the end face of the head end of the through hole of the inner hole tool sleeve is in abutment with the tool bar limiting end face. The application has the beneficial effect that the shockproof tension cover plate can be used to reduce the vibration deformation of the tool and avoid the occurrence of the tool vibration.

Description

Technical Field

[0001] This invention relates to cutting tools, and more particularly to a shock-resistant cutting tool holder. Background Technology

[0002] When machining deep internal holes, the existing tool holder is too long, which can easily cause tool vibration during the machining process, resulting in ripples on the product surface, reduced product accuracy, or even product scrap, thus increasing production costs. Summary of the Invention

[0003] To address the problems in the prior art, the present invention provides a vibration-damping tool holder.

[0004] This invention provides a vibration-damping tool holder, comprising an inner hole tool sleeve, a cylindrical tool holder, and a circular vibration-damping tension cover plate. The inner hole tool sleeve has a circular through hole. The tool holder includes a tool holder body for mounting a lathe tool and a tool holder tail for mounting the tool holder. The diameter of the tool holder tail is smaller than the diameter of the tool holder body. An axially limiting tool holder end face is provided between the tool holder tail and the tool holder body. The two ends of the through hole of the inner hole tool sleeve are a head end and a tail end, respectively. The tool holder tail is inserted into the through hole of the inner hole tool sleeve from the head end. The through hole of the inner hole tool sleeve and the tool holder tail are concentrically arranged. The anti-vibration tension cover plate is fitted with the limiting end face of the tool holder. The anti-vibration tension cover plate includes a cover plate body and a cover plate boss. The diameter of the cover plate boss is smaller than the diameter of the cover plate body. An axial limiting end face is provided between the cover plate boss and the cover plate body. The cover plate boss is inserted into the through hole of the inner hole tool holder from the tail end of the through hole. The end face of the tail end of the through hole of the inner hole tool holder is fitted with the limiting end face of the cover plate. The anti-vibration tension cover plate is fixedly connected to the tail of the tool holder by a first locking bolt. The inner hole tool holder is fixedly connected to the tail of the tool holder by a second locking bolt. The anti-vibration tension cover plate is concentrically arranged with the tool holder.

[0005] As a further improvement of the present invention, a gap is provided between the shock-absorbing tension cover plate and the tail of the cutter bar, the gap separating the shock-absorbing tension cover plate and the tail of the cutter bar along the axial direction, so that the shock-absorbing tension cover plate and the tail of the cutter bar do not contact each other.

[0006] As a further improvement of the present invention, the shock-absorbing tension cover plate is provided with a locking through hole that cooperates with the first locking bolt, and the first locking bolt passes through the locking through hole of the shock-absorbing tension cover plate and is threadedly connected to the tail of the tool bar.

[0007] As a further improvement of the present invention, the axis of the first locking bolt coincides with the axis of the tail of the tool bar, and the end face of the tail of the tool bar is provided with a threaded hole that mates with the first locking bolt.

[0008] As a further improvement of the present invention, the inner hole tool sleeve is provided with a threaded hole, and the second locking bolt passes through the threaded hole of the inner hole tool sleeve and presses against the tail of the tool bar.

[0009] As a further improvement of the present invention, a clamping platform is provided on the side of the tail of the tool bar, and the second locking bolt is clamped on the clamping platform.

[0010] As a further improvement of the present invention, the second locking bolts are symmetrically arranged on both sides of the tail of the tool bar, and there are at least two second locking bolts located on the same side of the tail of the tool bar.

[0011] As a further improvement of the present invention, the axis of the second locking bolt is perpendicular to the axis of the tail of the tool holder.

[0012] As a further improvement of the present invention, the depth of the through hole of the inner hole tool sleeve is greater than the sum of the height of the tool shank tail and the height of the cover plate boss of the shockproof tension cover plate.

[0013] As a further improvement of the present invention, a cutting tool mounting groove is provided on the end face of the tool holder body, a cutting tool is mounted in the cutting tool mounting groove, the cutting tool is located at one end of the tool holder, and the tail of the tool holder is located at the other end of the tool holder away from the cutting tool.

[0014] The beneficial effects of the present invention are: through the above solution, the vibration deformation of the cutting tool can be reduced by using the anti-vibration tension cover plate, thus avoiding the occurrence of tool vibration. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other solutions can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of a shockproof tool holder according to the present invention.

[0017] Figure 2 This is a cross-sectional schematic diagram of a shock-resistant knife bar according to the present invention.

[0018] Figure 3 This is a schematic diagram of the inner hole sleeve of a shockproof tool bar according to the present invention.

[0019] Figure 4 This is a schematic diagram of the inner hole sleeve of the anti-vibration tool bar according to the present invention from another direction.

[0020] Figure 5This is a cross-sectional schematic diagram of a shockproof tool holder according to the present invention.

[0021] Figure 6 This is a three-dimensional schematic diagram of a shockproof tool holder according to the present invention.

[0022] Figure 7 This is a cross-sectional schematic diagram of the anti-vibration tension cover plate of an anti-vibration knife bar according to the present invention. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 7As shown, a shock-absorbing tool holder includes an inner hole tool sleeve 1, a cylindrical tool holder 2, and a circular shock-absorbing tension cover plate 3. The inner hole tool sleeve 1 has a circular through hole 11. The tool holder 2 includes a tool holder body 22 for mounting a lathe tool and a tool holder tail 21 for mounting the tool holder. The diameter of the tool holder tail 21 is smaller than the diameter of the tool holder body 22. An axially limiting tool holder end face 25 is provided between the tool holder tail 21 and the tool holder body 22. The tool holder limiting end face 25 is a stepped surface of the tool holder tail 21 and the tool holder body 22. The two ends of the through hole 11 of the inner hole tool sleeve 1 are a head end and a tail end, respectively. The tool holder tail 21 is inserted into the through hole 11 of the inner hole tool sleeve 1 from the head end of the through hole 11. The through hole 11 of the inner hole tool sleeve 1 and the tool holder tail 21 are concentrically arranged. The end face 11 of the head end of the through hole 11 of the inner hole tool sleeve 1... 2. The shock-absorbing tension cover plate 3 is fitted with the limiting end face 25 of the tool bar. The shock-absorbing tension cover plate 3 includes a cover plate body 34 and a cover plate boss 31. The diameter of the cover plate boss 31 is smaller than the diameter of the cover plate body 34. An axial limiting end face 32 is provided between the cover plate boss 31 and the cover plate body 34. The limiting end face 32 is a stepped surface of the cover plate boss 31 and the cover plate body 34. The cover plate boss 31 is inserted into the through hole 11 of the inner hole tool sleeve 1 from the tail end of the through hole 11 of the inner hole tool sleeve 1. The end face 13 of the tail end of the through hole 11 of the inner hole tool sleeve 1 is fitted with the limiting end face 32 of the cover plate. The shock-absorbing tension cover plate 3 is fixedly connected to the tail of the tool bar 21 by a first locking bolt. The inner hole tool sleeve 1 is fixedly connected to the tail of the tool bar 21 by a second locking bolt. The shock-absorbing tension cover plate 3 and the tool bar 2 are concentrically arranged.

[0028] A gap 15 is provided between the shock-absorbing tension cover plate 3 and the tail of the cutter bar 21. The gap separates the shock-absorbing tension cover plate 3 and the tail of the cutter bar 21 along the axial direction, and the shock-absorbing tension cover plate and the tail of the cutter bar 21 do not contact each other.

[0029] The shock-absorbing tension cover plate 3 is provided with a locking through hole 33 that cooperates with the first locking bolt. The first locking bolt passes through the locking through hole 33 of the shock-absorbing tension cover plate 3 and is threadedly connected to the tail of the tool bar 21.

[0030] The tail of the tool holder 21 is provided with a threaded hole 24 that mates with the first locking bolt.

[0031] The axis of the first locking bolt coincides with the axis of the tail of the tool holder 21.

[0032] The inner hole tool sleeve 1 is provided with a threaded hole 14, and the second locking bolt passes through the threaded hole 14 of the inner hole tool sleeve 1 and presses against the tail of the tool bar 21.

[0033] The side of the tail of the tool bar 21 is provided with a clamping platform 23, and the second locking bolt is clamped on the clamping platform 23.

[0034] The second locking bolts are symmetrically arranged on both sides of the tail of the tool bar 21. There are at least two second locking bolts on the same side of the tail of the tool bar 21, preferably three on one side, for a total of six second locking bolts to lock the tail of the tool bar 21.

[0035] The axis of the second locking bolt is perpendicular to the axis of the tail of the tool holder 21.

[0036] The tool holder 2 is provided with a tool holder water cooling channel 26 for cooling the cutting tool.

[0037] The end face of the tool holder body 22 is provided with a cutting tool mounting groove 27, and a cutting tool is installed in the cutting tool mounting groove 27. The cutting tool is located at one end of the tool holder 2, and the tail end 21 of the tool holder is located at the other end of the tool holder 2 away from the cutting tool.

[0038] The present invention provides a shock-absorbing tool holder, the assembly process of which is as follows:

[0039] Insert the through hole 11 of the inner hole tool sleeve 1 into the tool rod tail 21 of the tool rod 2, so that the end face 12 of the inner hole tool sleeve 1 mates with the tool rod limiting end face 25 of the tool rod 2. Then, use the second locking bolt to pass through the six threaded holes 14 of the inner hole tool sleeve 1 and contact the clamping platform 23 to lock and fix it. Insert the cover plate boss 31 of the shockproof tension cover plate 3 into the other end of the through hole 11 of the inner hole tool sleeve 1, so that the cover plate limiting end face 32 of the shockproof tension cover plate 3 mates with the end face 13 of the inner hole tool sleeve 1. Use the first locking bolt to pass through the locking through hole 33 of the shockproof tension cover plate 3 and into the threaded hole 24 of the tool rod 2 to lock the shockproof tension cover plate 3, so that the shockproof tension cover plate 3 is connected to the tool rod 2.

[0040] The anti-vibration tool holder provided by this invention has the following advantages:

[0041] 1. The depth of the through hole 11 of the inner hole tool sleeve 1 is greater than the sum of the tool shank tail 21 of the tool shank 2 and the cover plate boss 31 of the anti-vibration tension cover plate 3, so that there is a gap 15 between the anti-vibration tension cover plate 3 and the tool shank 2. When the tool shank 2 moves downward to process the workpiece, the anti-vibration tension cover plate 3 exerts an upward pulling force on the tool shank 2 through the first locking bolt, which effectively prevents the problem of tool vibration, improves the product processing accuracy, reduces the product scrap rate, reduces the product production cost, and solves the problem of tool vibration caused by excessive tool length in the prior art.

[0042] 2. A shock-absorbing tension cover plate 3 was added. The shock-absorbing tension cover plate 3 is concentric with the tool holder 2, which improves the centering effect of the tool holder 2 during movement, increases the rigidity of the tool holder system, makes the entire tool holder system dynamically balanced in the axial direction, reduces the deformation of the tool holder tail end, reduces the amount of tool vibration deformation, and improves the product machining accuracy and quality.

[0043] 3. In terms of specific implementation, it is only necessary to add a shock-absorbing tension cover plate 3, and it is only necessary to make a simple modification to the existing tool holder structure, processing the traditional tool holder with smooth sides into a two-section structure with steps. This can be achieved with low modification cost, compatibility with existing parts, and no need to replace new parts extensively.

[0044] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A shockproof tool holder, characterized in that: The device includes an inner hole tool sleeve, a cylindrical tool shank, and a circular shock-absorbing and tensile-resistant cover plate. The inner hole tool sleeve has a circular through hole. The tool shank includes a main body for mounting a turning tool and a tail portion for mounting the tool shank. The diameter of the tail portion is smaller than the diameter of the main body. An axially limiting end face is provided between the tail portion and the main body. The two ends of the through hole in the inner hole tool sleeve are a head end and a tail end, respectively. The tail portion of the tool shank is inserted into the through hole of the inner hole tool sleeve from the head end. The through hole of the inner hole tool sleeve and the tail portion of the tool shank are concentric. The end face of the head end of the through hole of the inner hole tool sleeve fits against the limiting end face of the tool shank. The shock-absorbing and tensile-resistant cover plate includes a cover plate main body and a cover plate boss. The diameter of the cover plate boss is smaller than the diameter of the cover plate main body. An axle is provided between the cover plate boss and the cover plate main body. The cover plate limiting end face is inserted into the through hole of the inner hole tool sleeve from the tail end of the through hole of the inner hole tool sleeve. The end face of the tail end of the through hole of the inner hole tool sleeve is in contact with the limiting end face of the cover plate. The shock-absorbing tension cover plate is fixedly connected to the tail of the tool bar by a first locking bolt. The inner hole tool sleeve is fixedly connected to the tail of the tool bar by a second locking bolt. The shock-absorbing tension cover plate and the tool bar are concentrically arranged. There is a gap between the shock-absorbing tension cover plate and the tail of the tool bar. The gap separates the shock-absorbing tension cover plate and the tail of the tool bar along the axial direction. The shock-absorbing tension cover plate and the tail of the tool bar do not contact each other. The shock-absorbing tension cover plate is provided with a locking through hole that cooperates with the first locking bolt. The first locking bolt passes through the locking through hole of the shock-absorbing tension cover plate and is threadedly connected to the tail of the tool bar.

2. The anti-vibration tool holder according to claim 1, characterized in that: The axis of the first locking bolt coincides with the axis of the tail of the tool bar, and the end face of the tail of the tool bar is provided with a threaded hole that mates with the first locking bolt.

3. The anti-vibration tool holder according to claim 1, characterized in that: The inner hole of the tool holder is provided with a threaded hole, and the second locking bolt passes through the threaded hole of the inner hole of the tool holder and presses against the tail of the tool bar.

4. The anti-vibration tool holder according to claim 3, characterized in that: A clamping platform is provided on the side of the tail of the tool holder, and the second locking bolt is clamped to the clamping platform.

5. The anti-vibration tool holder according to claim 3, characterized in that: The second locking bolts are symmetrically arranged on both sides of the tail of the tool bar, and there are at least two second locking bolts located on the same side of the tail of the tool bar.

6. The anti-vibration tool holder according to claim 3, characterized in that: The axis of the second locking bolt is perpendicular to the axis of the tail of the tool holder.

7. The anti-vibration tool holder according to claim 1, characterized in that: The depth of the through hole of the inner hole sleeve is greater than the sum of the height of the tail of the tool bar and the height of the cover plate boss of the shockproof tension cover plate.

8. The anti-vibration tool holder according to claim 1, characterized in that: The tool holder body has a tool mounting groove on its end face, and a tool is mounted in the tool mounting groove. The tool is located at one end of the tool holder, and the tail of the tool holder is located at the other end of the tool holder away from the tool.

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