Damping vibration attenuation boring cutter

Abstract

The utility model discloses a damping vibration attenuation boring cutter which comprises a damping boring cutter rod and a cutter sleeve fixed at one end of the damping boring cutter rod, a boring cutter head is installed at the end, away from the damping boring cutter rod, of the cutter sleeve, a cutting edge part is fixed at the top end of the boring cutter head, and a positioning column is fixed at the back of the boring cutter head. A columnar groove sleeved with the positioning column is formed in the tool sleeve, and the top end and the bottom end of the tool sleeve are each provided with a multi-point-position bolting structure connected with the back of the boring tool bit. The tool pouch and the positioning column are connected again in the horizontal direction through the main bolt, the rib plate, the tool pouch and the positioning column can be connected more evenly and stably through the design of multiple connecting point positions of the multi-point-position bolting structure, and a larger supporting area is provided. The vibration and resonance phenomena of the boring tool bit and the blade part can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boring cutters, in particular to a damping and vibration-reducing boring cutter. Background Art

[0002] One of the most common applications of turning is internal hole cutting. The shape of the internal hole cutting tool bar enables the boring tool to perform efficient hole enlargement and high-precision profiling through the pre-drilled hole, thereby ultimately meeting the specific processing requirements of the internal hole. In this process, the damping and vibration-damping boring tool is a tool used to reduce the vibration and impact generated during the cutting process, thereby improving the processing quality and the surface roughness of the workpiece. The structure of the damping and vibration-damping boring tool includes a tool holder, a blade and a vibration-damping device. The tool holder is usually composed of a tool body and a tool holder connecting part, and the blade is a cutting part installed on the tool holder. The vibration-damping device is the core part of the damping and vibration-damping turning tool, which is usually composed of a vibration-damping rod, a vibration-damping plate and a vibration-damping bolt. The vibration-damping rod connects the tool holder and the blade, and the vibration-damping plates are located at both ends of the vibration-damping rod, and the vibration-damping bolt is used to adjust the position of the vibration-damping plate.

[0003] As disclosed in the authorization announcement number CN212945475U, a fine-tuning precision boring tool with damping and vibration reduction includes a boring head assembly, a support base, a cooling pipe and a damping and vibration reduction module; the rear end of the cooling pipe is fixedly arranged on the support base, and the front end of the cooling pipe is fixedly connected to the boring head assembly; the cooling pipe can transport coolant to the boring head assembly; the damping and vibration reduction module is provided with a through hole along the axial direction, the damping and vibration reduction module is sleeved on the outside of the cooling pipe, and the two ends of the damping and vibration reduction module are respectively sealed and connected to the boring head assembly and the support base The seat is designed for long overhang boring tools and can reduce the vibration during cutting. However, in this technical solution, when the boring head assembly and the damping vibration reduction module are bolted, they are mainly connected to the damping vibration reduction module by two bolt points in the Z-axis direction of the boring head assembly. The connection points and connection areas are small, so that the connection structure between the boring head assembly and the damping vibration reduction module is not stable enough. Under high-speed processing or heavy loads, the boring head is prone to loose connection or instability, that is, insufficient rigidity leads to vibration and resonance, affecting the processing quality and the surface roughness of the workpiece. Utility Model Content

[0004] The purpose of the utility model is to provide a damping and vibration-reducing boring tool, which connects the tool sleeve and the boring head by using a main bolt at two points in the horizontal direction of the Y axis, and connects the tool sleeve and the boring head by using an upper bolt connection with multiple connection points in the Z axis direction, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a damping and vibration-reducing boring tool, comprising a damping boring tool rod and a tool sleeve fixed to one end of the damping boring tool rod, a boring head is installed at one end of the tool sleeve away from the damping boring tool rod, and a blade portion is fixed to the top of the boring head, a positioning column is fixed to the back of the boring head, and a columnar groove which is mutually fitted with the positioning column is arranged inside the tool sleeve, a multi-point bolted structure which is connected to the back of the boring head is arranged at the top and bottom ends of the tool sleeve, and main bolts for connecting the tool sleeve and the positioning column are symmetrically installed on the outer walls of both sides of the tool sleeve.

[0006] Preferably, the width of the blade portion is greater than the outer diameter of the damping boring bar.

[0007] Preferably, two symmetrical cutting notches are provided at one end of the blade portion away from the boring head.

[0008] Preferably, the top and bottom ends of the tool sleeve are both provided with rectangular cutting grooves, and the bottom surface of the rectangular cutting groove is provided with a planar portion, and the bottom of the planar portion is provided with a plurality of equidistant Z-direction through holes, and the back of the boring head is installed with a rib plate for plugging with the rectangular cutting groove.

[0009] Preferably, the multi-point bolting structure includes a plurality of equidistant countersunk holes arranged at the top of the rib plate, and secondary bolts installed inside the countersunk holes. The top and bottom ends of the positioning column are both provided with a plurality of equidistant first internal threaded holes, and the countersunk holes, Z-direction through holes, and first internal threaded holes are concentric with each other.

[0010] Preferably, the outer walls on both sides of the tool sleeve and the positioning column are provided with mutually concentric Y-direction through holes and second internal threaded holes.

[0011] Preferably, the positioning column is made of stainless steel.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the damping and vibration-reducing boring tool is provided with a main bolt, a positioning column and other structures that cooperate with each other, and the tool sleeve and the positioning column are connected again in the horizontal direction by the main bolt, and the design of multiple connection points of the multi-point bolted structure can make the connection between the rib plate, the tool sleeve and the positioning column more uniform and stable, which provides a larger support area, can effectively reduce the vibration and resonance of the boring head and the blade, and improve the stability and accuracy of the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the knife sheath of the utility model;

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the boring cutter head of the utility model;

[0018] In the figure: 1. damping boring bar; 2. tool sleeve; 201. columnar groove; 202. Y-direction through hole; 3. boring head; 4. blade portion; 5. rectangular cut-out groove; 501. plane portion; 502. Z-direction through hole; 6. rib plate; 601. countersunk hole; 7. multi-point bolting structure; 8. positioning column; 801. first internal threaded hole; 802. second internal threaded hole; 9. main bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 The utility model provides an embodiment: a damping and vibration-reducing boring tool, comprising a damping boring tool rod 1 and a tool sleeve 2 fixed at one end of the damping boring tool rod 1, a boring head 3 is installed at one end of the tool sleeve 2 away from the damping boring tool rod 1, and a blade portion 4 is fixed at the top of the boring head 3, a positioning column 8 is fixed at the back of the boring head 3, and a columnar groove 201 which is mutually fitted with the positioning column 8 is arranged inside the tool sleeve 2, a multi-point bolting structure 7 connected to the back of the boring head 3 is arranged at the top and bottom of the tool sleeve 2, and main bolts 9 for connecting the tool sleeve 2 and the positioning column 8 are symmetrically installed on the outer walls of both sides of the tool sleeve 2;

[0021] The top and bottom of the tool sleeve 2 are both provided with a rectangular cut-out groove 5, and the bottom surface of the rectangular cut-out groove 5 is provided with a plane portion 501, and the bottom of the plane portion 501 is provided with a plurality of equidistant Z-direction through holes 502. The back of the boring head 3 is provided with a rib plate 6 for plugging with the rectangular cut-out groove 5. The back of the boring head 3 and the rectangular cut-out groove 5 are plugged with the rib plate 6. The rectangular cut-out groove 5 provides an insertion position for the rib plate 6, and the rib plate 6 provides additional support and positioning during plugging, so that the boring head 3 can be accurately and firmly inserted into the tool sleeve 2, which can effectively avoid displacement and misalignment during plugging;

[0022] The multi-point bolting structure 7 includes a plurality of equally spaced countersunk holes 601 disposed on the top of the rib plate 6, and auxiliary bolts installed inside the countersunk holes 601. The top and bottom ends of the positioning column 8 are both provided with a plurality of equally spaced first internal threaded holes 801. The countersunk holes 601, the Z-direction through holes 502, and the first internal threaded holes 801 are concentric with each other.

[0023] The auxiliary bolts in the multi-point bolting structure 7 are screwed into the tool sleeve 2 and the first internal threaded hole 801 in sequence through the countersunk hole 601. Compared with a single connection point, the multi-point bolting structure 7 has multiple connection points that can disperse the connection force, reduce the risk of single-point failure, and reduce the possibility of the boring head 3 and the tool sleeve 2 being loosened or falling off.

[0024] The width of the blade portion 4 is greater than the outer diameter of the damping boring bar 1. The larger blade portion 4 can provide a larger cutting area, increase the stability during cutting, and reduce the vibration and deformation of the tool;

[0025] The blade portion 4 is provided with two symmetrical cutouts at one end away from the boring head 3. When the cutouts are in contact with the workpiece, the contact area of ​​the cutting portion can be reduced, thereby reducing the friction during cutting. Moreover, through the design of the cutouts, the chips generated during cutting can be more easily removed from the tool, thereby reducing the chip jamming and accumulation on the tool during cutting.

[0026] The outer walls of both sides of the knife sleeve 2 and the positioning column 8 are provided with mutually concentric Y-direction through holes 202 and second internal threaded holes 802, and the threaded end of the main bolt 9 is screwed into the second internal threaded hole 802 from the Y-direction through hole 202 until the main bolt 9 is screwed into place;

[0027] The positioning column 8 is made of stainless steel. Through the support and fixation of the positioning column 8, the connection between the boring head 3 and the tool sleeve 2 is more secure, which can effectively avoid loosening or falling off during the processing. Moreover, since the outer diameter of the positioning column 8 is equal to the diameter of the cylindrical groove 201, it can effectively reduce the vibration and impact of the tool during the processing.

[0028] When the embodiment of the present application is used, the staff first takes out the damping boring bar 1 and the boring head 3 to be assembled and used, and inserts the positioning column 8 on the back of the boring head 3 into the tool sleeve 2 until the positioning column 8 and the tool sleeve 2 are plugged into the limit position. At this time, the rectangular cutting grooves 5 at the top and bottom ends of the tool sleeve 2 are synchronously plugged into the rib plate 6 on the back of the boring head 3. Then the staff bolts the rib plate 6, the tool sleeve 2, and the positioning column 8 in the vertical direction using the multi-point bolting structure 7, and bolts the tool sleeve 2, the positioning column 8 in the horizontal direction using the main bolt 9. The positioning column 8 is connected again. The design of multiple connection points of the multi-point bolted structure 7 can make the connection between the rib plate 6, the tool sleeve 2, and the positioning column 8 more uniform and stable, which provides a larger support area, can effectively reduce the vibration and resonance of the boring head 3 and the blade 4, and improve the stability and accuracy of the processing. The main bolt 9 further connects the tool sleeve 2 and the positioning column 8, making the connection between the boring head 3 and the tool sleeve 2 more stable, thereby reducing loose or unstable connections and improving the accuracy and quality of boring tool processing.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A damping and vibration reducing boring tool, characterized in that: The invention comprises a damping boring bar (1) and a tool sleeve (2) fixed at one end of the damping boring bar (1); a boring head (3) is installed at one end of the tool sleeve (2) away from the damping boring bar (1); a blade portion (4) is fixed at the top of the boring head (3); a positioning column (8) is fixed at the back of the boring head (3); a columnar groove (201) which is mutually fitted with the positioning column (8) is arranged inside the tool sleeve (2); a multi-point bolt connection structure (7) which is connected to the back of the boring head (3) is arranged at the top and bottom ends of the tool sleeve (2); main bolts (9) for connecting the tool sleeve (2) and the positioning column (8) are symmetrically installed on the outer walls of both sides of the tool sleeve (2).

2. A damping and vibration reducing boring tool according to claim 1, characterized in that: The width of the blade portion (4) is greater than the outer diameter of the damping boring bar (1).

3. A damping and vibration reducing boring tool according to claim 1, characterized in that: The blade portion (4) is provided with two symmetrical cutting notches at one end away from the boring head (3).

4. A damping and vibration reducing boring tool according to claim 1, characterized in that: The top and bottom ends of the tool sleeve (2) are both provided with a rectangular cut-out groove (5), and the bottom surface of the rectangular cut-out groove (5) is provided with a plane portion (501), and the bottom of the plane portion (501) is provided with a plurality of equidistant Z-direction through holes (502), and the back side of the boring head (3) is provided with a rib plate (6) for plugging into the rectangular cut-out groove (5).

5. A damping and vibration reducing boring tool according to claim 4, characterized in that: The multi-point bolting structure (7) includes a plurality of equidistant countersunk holes (601) arranged at the top of the rib plate (6), and auxiliary bolts installed inside the countersunk holes (601). The top and bottom ends of the positioning column (8) are both provided with a plurality of equidistant first internal threaded holes (801). The countersunk holes (601), the Z-direction through holes (502), and the first internal threaded holes (801) are concentric with each other.

6. A damping and vibration reducing boring tool according to claim 1, characterized in that: The outer walls of both sides of the knife sleeve (2) and the positioning column (8) are provided with Y-direction through holes (202) and second internal threaded holes (802) which are concentric with each other.

7. A damping and vibration reducing boring tool according to claim 1, characterized in that: The positioning column (8) is made of a stainless steel component.

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