Multi-section embedded damping vibration reduction turning tool based on steel pipe base body

Abstract

This invention provides a multi-segment embedded damping and vibration-damping lathe tool based on a steel pipe substrate, relating to the field of metal cutting technology. It includes a tool holder body with an axially penetrating mounting hole. Multiple damping blocks are sequentially arranged axially within the hole, each damping block having an axially penetrating vent hole. The length of each damping block decreases from the front end to the rear end. A reinforcing rod is interference-fitted to the rear end of the tool holder body, with the front end of the reinforcing rod abutting against the last damping block. This invention eliminates assembly gaps through the elastic fit between the damping blocks and rubber elements, and the axial preload and radial tension of the reinforcing rod, effectively suppressing cutting vibrations under overhang conditions of five times the diameter or greater, thus improving machining quality and stability. It integrates a coolant flow channel from the tail end to the tool head and a quick-release structure for the damping blocks, improving machining efficiency and maintenance convenience. The damping blocks are covered with a rubber sleeve, utilizing elastic buffering to reduce friction loss and high-frequency impact damage, significantly extending service life.

Description

Technical Field

[0001] This invention mainly relates to the field of metal cutting technology, specifically to a multi-segment embedded damping and vibration-damping turning tool based on a steel pipe substrate, and more particularly to a vibration-damping tool holder structure as a functional component and accessory of a machine tool. Background Technology

[0002] In the machining industry, deep hole machining and long cantilever cutting are common technological challenges. When the length-to-diameter ratio of the tool holder reaches 5 to 6, the rigidity of the tool holder system decreases sharply, making it highly susceptible to regenerative chatter under cutting force. This cutting vibration not only causes surface roughness and increases surface roughness, but also leads to dimensional inaccuracies and abnormal tool breakage, severely restricting machining efficiency and product quality. Therefore, effectively suppressing tool holder vibration has always been a core problem that urgently needs to be solved in the field of metal cutting.

[0003] Currently, vibration damping tool holders used in industry to solve the above-mentioned cutting vibration problems are mainly divided into the following two categories: The first category is high-end integrated damping vibration reduction tool holders. These products typically use high-strength alloy steel as the base material, with a complex damping mechanism sealed inside, such as a precisely fitted dynamic vibration absorber or impact damping block, and filled with a special damping fluid. Their vibration reduction mechanism is complex, consuming vibration energy through the relative motion of the internal damping components, resulting in a highly significant vibration reduction effect. However, this type of tool holder has significant limitations: on the one hand, its internal structure is highly precise, involving multi-layer assembly and strict sealing processes, requiring extremely high machining accuracy and assembly technology, leading to high manufacturing costs; on the other hand, the special materials used and complex production processes determine its extremely high market price. For the vast number of small and medium-sized machining enterprises and individual processing shops, these high-end tool holders are expensive imported industrial consumables. Limited operating profits and cost pressures make it difficult for them to afford their high purchase price, hindering the widespread adoption of this technology in basic manufacturing sectors.

[0004] The second category is solid cemented carbide tool holders (tungsten carbide tool holders). These tool holders utilize the high elastic modulus and high rigidity of cemented carbide itself to enhance the overall bending stiffness of the tool holder, thereby suppressing vibration to some extent. However, in recent years, the price of tungsten concentrate, the main raw material for cemented carbide, has continued to rise, leading to a significant increase in the raw material costs and sintering processing costs of tungsten carbide products. As a result, the market price of standard-sized tungsten carbide tool holders has risen to several thousand yuan, with some large-sized or high-precision products even exceeding ten thousand yuan. The high material costs contrast sharply with the increasingly thin profit margins in the current machining industry. To control tool costs, many small and medium-sized machining enterprises have had to reduce cutting parameters and adopt conservative machining processes, severely restricting production efficiency and market competitiveness.

[0005] In summary, existing technologies exhibit significant market gaps and technical pain points: on the one hand, high-end damping tool holders offer superior performance but are prohibitively expensive, hindering their large-scale application in conventional machining scenarios; on the other hand, the cost-effectiveness of solid tungsten carbide tool holders, the mainstream material, is plummeting due to soaring raw material prices, placing a heavy burden on end-users. Therefore, the industry urgently needs a new tool holder technology solution that can provide reliable vibration damping while significantly reducing manufacturing costs to meet the demands of small and medium-sized manufacturing enterprises for production tools that combine high performance and low cost. Summary of the Invention

[0006] 1. The technical problem that the invention aims to solve: This invention provides a multi-segment embedded damping and vibration reduction turning tool based on a steel pipe substrate, which solves the technical problem in the background art that existing damping tool holders have high costs due to process limitations, and are mostly limited to the field of large length-to-diameter ratios of 10 times or more, making it difficult to popularize their application in conventional machining of 7-8 times or less.

[0007] 2. Technical Solution: To achieve the above objectives, the technical solution provided by the present invention is as follows: a multi-segment embedded damping and vibration reduction lathe tool based on a steel pipe substrate, comprising a tool holder body made of metal tubing, wherein the tool holder body is provided with a through mounting hole along the axial direction, and the front end of the tool holder body is provided with a connecting structure for detachably mounting a cutting head; Multiple damping blocks are sequentially arranged in the mounting through hole along the axial direction. Each damping block is provided with a vent hole that runs through the axial direction. The length of each damping block decreases from the side closer to the front end of the tool holder body to the side closer to the rear end of the tool holder body. A reinforcing rod is fixedly connected to the rear end of the tool holder body by an interference fit, and the front end of the reinforcing rod abuts against the damping block located at the far end through an annular pad.

[0008] Furthermore, the rear end of the reinforcing rod is provided with a cross notch along the axial direction. The cross notch divides the rear end of the reinforcing rod into multiple radially elastically deformable lobes. A tapered threaded hole is provided at the center of the cross notch. A tapered threaded plug is internally threaded into the tapered threaded hole. An internal hexagonal hole is provided at the rear end of the tapered threaded plug.

[0009] Furthermore, an annular limiting groove is formed on the outer peripheral surface of the damping block, and a rubber ring is embedded in the annular limiting groove.

[0010] Furthermore, the damping block is covered with a rubber sleeve on its outer side, and the rubber sleeve completely covers the entire outer peripheral surface of the damping block.

[0011] Furthermore, the damping block is covered with a rubber sleeve on its outer side. The rubber sleeve is symmetrically arranged at both ends of the damping block. The middle part of the damping block is not covered, and the diameter of the middle part is larger than the diameter of the covered parts at both ends of the damping block, while smaller than the outer diameter after being covered by the rubber sleeve.

[0012] Furthermore, the damping block is covered with a rubber sleeve on its outer side. The rubber sleeve is located in the axial middle of the damping block. The two ends of the damping block are not covered, and the diameter of the two ends is larger than the diameter of the covered part in the middle of the damping block, but smaller than the outer diameter after being covered by the rubber sleeve.

[0013] Furthermore, the cutting head is mounted on the front end of the connecting block, and the rear end of the connecting block is provided with a threaded protrusion, which is threadedly connected to the front end of the mounting through hole; the rear end face of the connecting block is provided with an arc-shaped groove, and the side wall of the arc-shaped groove is provided with a liquid spraying hole, the outlet of the liquid spraying hole facing the cutting head; the side wall of the tool holder body is provided with an L-shaped liquid inlet, the inlet of the L-shaped liquid inlet is located on the inner wall of the tool holder body, and the outlet of the L-shaped liquid inlet penetrates the front end face of the tool holder body and communicates with the arc-shaped groove at the rear end of the connecting block; the front end of the reinforcing rod is provided with an axially extending liquid inlet, the side wall of the reinforcing rod is provided with an outlet hole communicating with the liquid inlet, and the outer side of the outlet hole is provided with an annular groove coaxial with the reinforcing rod, the annular groove being aligned with the inlet of the L-shaped liquid inlet.

[0014] Furthermore, annular sealing grooves are respectively formed on the outer circumferential surfaces of the reinforcing rods on both sides of the annular groove, and each annular sealing groove is embedded with an elastic sealing ring.

[0015] Furthermore, annular pads are provided at both ends of the damping block, and annular pads are also provided at the intersection of the damping block and the reinforcing rod.

[0016] Furthermore, threaded lifting holes are provided at both ends of the vent hole.

[0017] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: This invention is rationally designed and can significantly reduce manufacturing costs. For cutting heads with a diameter of seven times or less, iron or copper materials can be used as the main materials for the damper. For cutting heads with a diameter of more than seven times, tungsten steel or other higher-density materials can be used. This ensures both material cost and damping performance, reducing material costs by more than 70%. It solves the industry pain point that small and medium-sized processing enterprises cannot use high-performance vibration-damping tool holders due to high costs.

[0018] Furthermore, the design of multi-segment damping blocks with gradually varying lengths, combined with the elastic damping effect of rubber components, gives the front of the tool holder a greater damping mass. The reinforcing rod provides axial preload and achieves radial tightening through the cross notch and tapered thread plug, which can reduce vibration caused by gaps due to dimensional errors, while eliminating assembly gaps. This effectively suppresses cutting vibration under overhang conditions of five to six times the diameter and above, improving machining quality and stability during machining. In addition, the damping blocks are covered with rubber sleeves. Utilizing the elastic buffering and isolation effect of rubber, the friction loss between the damping blocks and the inner wall of the mounting through-hole and high-frequency impact damage can be significantly reduced, thereby improving the service life of the device.

[0019] Finally, the built-in coolant flow channel achieves precise cooling and lubrication from the tail of the tool holder to the tool head, and the double sealing rings ensure high-pressure sealing. The threaded lifting holes at both ends of the damping block facilitate disassembly and replacement, significantly improving maintenance convenience and the reusability of parts. The whole adopts a modular design, which is easy to assemble. By adjusting the reinforcing rod material and damping block configuration, it can adapt to different working conditions and has strong versatility.

[0020] By optimizing the overall structural design and installation process of the damping tool holder, the manufacturing cost is significantly reduced. This allows it to not only completely replace solid tungsten carbide tool holders used in conventional 7-8 times diameter scenarios in an economical and efficient manner, solving the problem of high cost of tungsten carbide; but also, through material replacement, this solution retains the high-performance capability suitable for deep hole machining of 10 times or even tens of times the diameter, achieving full-scenario coverage from conventional to ultra-large length-to-diameter ratios and expanding the application boundaries of damping tool holders.

[0021] It should be noted that the structures not described in this invention are not related to the design points and improvement directions of this invention, and are the same as or can be implemented using existing technologies, so they will not be elaborated here. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the exploded structure of the present invention; Figure 3 This is a schematic diagram of the second embodiment of the damping block of the present invention; Figure 4 This is a schematic diagram of the third embodiment of the damping block of the present invention; Figure 5 This is a schematic diagram of the fourth embodiment of the damping block of the present invention; Figure 6 This is a cross-sectional structural diagram of the present invention; Figure 7 This is a partial schematic diagram of the cross-sectional structure of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the reinforcing rod of the present invention.

[0023] Figure label: 1. Tool holder body; 2. Mounting through hole; 3. Cutting head; 31. Connecting block; 32. Threaded protrusion; 33. Arc groove; 34. Spray hole; 35. L-shaped infusion hole; 36. Infusion groove; 37. Outlet hole; 38. Annular groove; 39. Annular sealing groove; 4. Damping block; 41. Rubber ring; 42. Rubber sleeve; 43. Annular pad; 5. Vent hole; 6. Reinforcing rod; 61. Cross notch; 62. Tapered threaded hole; 63. Tapered threaded plug. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "page," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] It should be noted that structures not described in this invention do not involve the design points and improvement directions of this invention, and can all be achieved using existing technologies known to those skilled in the art.

[0029] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0030] See attached document Figure 1-8 The present invention provides a multi-segment embedded damping vibration reduction lathe tool based on a steel pipe substrate, including a tool holder body 1, multiple damping blocks 4 and reinforcing rods 6.

[0031] The tool holder body 1 is made of metal tubing, specifically ordinary carbon structural steel tubing, alloy structural steel tubing, or iron tubing, which significantly reduces material costs compared to traditional solid tungsten steel tool holders. The tool holder body 1 has a through mounting hole 2 along its axial direction. The mounting hole 2 is a stepped or straight hole used to accommodate the damping block 4 and the reinforcing rod 6. The front end of the tool holder body 1 has a connecting structure for detachably mounting the cutting head 3. In this embodiment, this connecting structure is an internally threaded hole for threaded connection with the connecting block 31 that mounts the cutting head 3.

[0032] Multiple damping blocks 4 are sequentially arranged axially within the mounting through-hole 2. Each damping block 4 is made of a relatively heavy metal material. For diameters less than seven times the cutting head 3, iron or copper can be used as the main material for the damper; for diameters greater than seven times the cutting head 3, tungsten steel or other higher-density materials can be used to ensure both material cost and damping performance. Each damping block 4 has an axially penetrating vent 5 to balance internal and external air pressure during installation and temperature changes. The length of each damping block 4 decreases from the side closer to the front end of the tool holder body 1 to the side closer to the rear end of the tool holder body 1, meaning the damping block 4 closer to the cutting head 3 is longer, and the damping block 4 closer to the tail is shorter. This gradual length design optimizes the overall mass distribution and damping characteristics of the tool holder along the axial direction, with the front end, where the "maximum stress" is located, having a larger damping mass, thus more effectively absorbing cutting vibration energy.

[0033] In this embodiment, two damping blocks 4 are provided, and the total length of the two damping blocks 4 is designed to be four times the diameter of the cutting tool. This length ratio has been verified by experiments and can effectively avoid the vibration threshold of more than five times the diameter. In this range, the damper balances and absorbs the vibration, ensuring the best vibration reduction effect under overhang conditions of seven to eight times the diameter and above.

[0034] The reinforcing rod 6 is fixedly connected to the rear end of the tool holder body 1 by an interference fit, and the front end of the reinforcing rod 6 abuts against the damping block 4 located at the far end through an annular pad 43, that is, applying an axial preload to multiple damping blocks 4, so that each damping block 4 is in close contact with each other and stable within the mounting through hole 2. The material of the reinforcing rod 6 is selected according to the total length of the tool holder and the working conditions: when the total length of the tool holder is short, the reinforcing rod 6 can be made of ordinary carbon structural steel to reduce costs; when the total length of the tool holder is long, the reinforcing rod 6 can be made of materials with higher rigidity such as tungsten steel or ceramics to ensure overall rigidity. To facilitate the smooth pressing of the reinforcing rod 6 into the mounting through hole 2 and avoid jamming and sticking, the outer circumferential surface of the reinforcing rod 6 can be coated with a graphite powder coating or a solid lubricating coating such as molybdenum disulfide.

[0035] In another embodiment, the limiting structure of the reinforcing rod 6 was further optimized.

[0036] The rear end of the reinforcing rod 6 has a cross-shaped notch 61 along the axial direction, which divides the rear end of the reinforcing rod 6 into multiple radially elastically deformable lobes. The center of the cross-shaped notch 61 has a tapered threaded hole 62, and a tapered threaded plug 63 is internally threaded into the tapered threaded hole 62.

[0037] During assembly, the reinforcing rod 6 is first pressed into the rear end of the tool holder body 1 with an interference fit. Then, a long-handled hexagonal wrench is inserted from the lower end of the tool holder body 1 into the internal hexagonal hole at the rear end of the tapered threaded plug 63 and tightened by rotation. As the tapered threaded plug 63 is screwed into the tapered threaded hole 62, its tapered head applies a radially outward expanding force to the flaps, causing the flaps at the cross notch 61 to elastically open outward and further press against the inner wall of the mounting through hole 2. This achieves both radial and circumferential limiting of the reinforcing rod 6, effectively preventing the reinforcing rod 6 from loosening or rotating under severe cutting loads. It also reduces vibration caused by dimensional errors between the reinforcing rod 6 and the mounting through hole 2, improving the overall structural stability.

[0038] In another embodiment, the present invention provides various ways of combining the damping block 4 with the rubber element to adjust the damping characteristics.

[0039] In the first method, such as Figure 2 As shown, an annular limiting groove is formed on the outer circumferential surface of the damping block 4, and a rubber ring 41 is embedded in the annular limiting groove. The rubber ring 41 elastically abuts against the inner wall of the mounting through hole 2, providing damping effect on the one hand, and radial positioning of the damping block 4 on the other hand.

[0040] In the second method, such as Figure 3 As shown, the damping block 4 is covered by a rubber sleeve 42, which completely covers the entire outer circumference of the damping block 4. This fully enclosed structure allows for comprehensive elastic contact between the damping block 4 and the tool holder body 1, maximizing the damping effect.

[0041] In the third way, such as Figure 4 As shown, the damping block 4 is covered with rubber sleeves 42 on its outer side. The rubber sleeves 42 are symmetrically arranged at both ends of the damping block 4. The middle part of the damping block 4 is not covered, and the diameter of the middle part is larger than the diameter of the covered parts at both ends of the damping block 4, but smaller than the outer diameter of the damping block 4 after being covered by the rubber sleeves 42. This structure with two supported ends and a suspended middle creates a gap between the middle part of the damping block 4 and the mounting through hole 2. Vibration energy is mainly transmitted and dissipated through the rubber sleeves 42 at both ends. The protruding part can increase the weight of the damping block 4, resulting in a better damping effect.

[0042] In the fourth method, such as Figure 5 As shown, the damping block 4 is covered by a rubber sleeve 42, which is located at the axial center of the damping block 4. The two ends of the damping block 4 are not covered, and the diameter of these two ends is larger than the diameter of the covered portion of the damping block 4, but smaller than the outer diameter of the portion covered by the rubber sleeve 42. This structure, with intermediate support and suspended ends, can also achieve specific damping characteristics.

[0043] This device, by covering the outside of the damping block 4 with a rubber sleeve 42, utilizes the elastic buffering and isolation effect of the rubber to significantly reduce the frictional loss and high-frequency impact damage between the damping block 4 and the inner wall of the mounting through hole 2. This structure can extend the service life of the damping block 4 by more than two times.

[0044] In addition, as shown in the figure, annular pads 43 can be provided at both ends of the damping block 4. The annular pads 43 are made of wear-resistant rubber material to prevent the ends of the damping block 4 from wearing under long-term vibration. At the same time, they can adjust the gap between adjacent damping blocks 4. The protruding part can increase the weight of the damping block 4 and achieve a better damping effect. The annular pads 43 are also provided at the intersection of the damping block 4 and the reinforcing rod 6. The annular pads, as an intermediate medium, can buffer the axial impact force of the reinforcing rod on the damping block string, making the preload distribution more uniform. At the same time, the pads themselves have certain elasticity or wear-resistant properties, which can form an auxiliary damping interface between the reinforcing rod and the damping block to further consume vibration energy.

[0045] Based on the aforementioned embodiments, the present invention further adds a coolant delivery function.

[0046] like Figure 6 As shown, the cutting head 3 is mounted on the front end of the connecting block 31. The rear end of the connecting block 31 is provided with a threaded protrusion 32, which is threadedly connected to the front end of the mounting through hole 2. An arc-shaped groove 33 is provided on the rear end face of the connecting block 31, and a liquid spraying hole 34 is provided on the side wall of the arc-shaped groove 33. The outlet of the liquid spraying hole 34 faces the cutting edge of the cutting head 3.

[0047] An L-shaped infusion hole 35 is provided in the side wall of the main body 1 of the cutter bar. The inlet of the L-shaped infusion hole 35 is located on the inner wall of the main body 1 of the cutter bar. The outlet of the L-shaped infusion hole 35 penetrates the front end face of the main body 1 of the cutter bar and is connected to the arc groove 33 at the rear end of the connecting block 31.

[0048] The front end of the reinforcing rod 6 is provided with an axially extending infusion groove 36, and the side wall of the reinforcing rod 6 is provided with an outlet hole 37 that communicates with the infusion groove 36. The outer side of the outlet hole 37 is provided with an annular groove 38 that is coaxial with the reinforcing rod 6, and the annular groove 38 is aligned with the inlet of the L-shaped infusion hole 35.

[0049] To prevent coolant leakage and improve the structural strength of the reinforcing rod 6 after connection, annular sealing grooves 39 are respectively opened on the outer circumferential surface of the reinforcing rod 6 on both sides of the annular groove 38. Each annular sealing groove 39 is embedded with an elastic sealing ring. The inner circumferential surface of the elastic sealing ring is in elastic sealing contact with the outer circumferential surface of the reinforcing rod 6, and the outer circumferential surface is in elastic sealing contact with the inner wall of the mounting through hole 2.

[0050] During operation, coolant enters the fluid delivery tank 36 of the reinforcing rod 6 from the tail of the tool holder through a pipeline. For example, a threaded connecting pipe is installed at the end of the pipeline, and an internal thread is installed at the fluid delivery tank 36 to connect with the threaded connecting pipe. The coolant flows into the annular groove 38 through the outlet hole 37, and then enters the inlet of the L-shaped fluid delivery hole 35. It flows along the L-shaped fluid delivery hole 35 to the front end of the tool holder body 1, enters the arc-shaped groove 33 of the connecting block 31 through the outlet, and finally is sprayed out from the spray hole 34 to the cutting area of ​​the cutting head 3, achieving effective cooling and lubrication.

[0051] Taking an embodiment that includes coolant delivery function as an example, the assembly process of the present invention is as follows: First, a graphite powder coating is applied to the outer circumferential surface of the reinforcing rod 6. Then, the reinforcing rod 6 is pressed into the mounting through hole 2 at the rear end of the tool holder body 1 with an interference fit, so that the front end of the reinforcing rod 6 abuts against the predetermined position.

[0052] Next, select the appropriate number and length of damping blocks 4 according to the design requirements. Each damping block 4 can be configured with a rubber ring 41 or a rubber sleeve 42 in any of the aforementioned ways. Insert the damping blocks 4 sequentially from the front end of the mounting through hole 2, so that the damping blocks 4 are arranged axially, with the rear end of the last damping block 4 abutting against the front end of the reinforcing rod 6.

[0053] Then, screw the threaded protrusion 32 of the connecting block 31 into the threaded hole at the front end of the mounting through hole 2, lock the connecting block 31, so that the rear end face of the connecting block 31 abuts against the frontmost damping block 4, thereby axially pressing all the damping blocks 4.

[0054] Finally, the cutting head 3 is installed on the front end of the connecting block 31 to complete the assembly.

[0055] If further limiting of the reinforcing rod 6 is required, after the reinforcing rod 6 is pressed in, a long-handled hexagonal wrench can be inserted from the rear end of the tool holder body 1 to tighten the tapered thread plug 63, so that the petals at the cross notch 61 open and press against the inner wall of the mounting through hole 2.

[0056] The vibration reduction principle of this invention is based on the coupling of the impact damping effect and the friction damping effect of the multi-segment damping block 4.

[0057] When the tool holder undergoes bending vibration during cutting, the multiple damping blocks 4 within the mounting through hole 2 experience slight relative motion relative to the tool holder body 1 due to inertia. There is a tendency for relative motion between the damping blocks 4 and the inner wall of the mounting through hole 2, as well as between adjacent damping blocks 4. This vibrational energy is dissipated through the following methods: The friction between the damping block 4 and the inner wall of the mounting through hole 2 converts the vibration mechanical energy into heat energy; when a rubber ring 41 or a rubber sleeve 42 is provided, the viscoelastic hysteresis effect of the rubber material can effectively absorb the vibration energy; the mutual collision and friction between each damping block 4 further consumes energy. The design of the damping block 4 with gradually varying length gives the front of the tool holder a larger damping mass, achieving optimized matching of damping characteristics and significantly improving energy consumption efficiency.

[0058] The reinforcing rod 6 provides axial preload to the damping blocks 4, ensuring that each damping block 4 remains tightly fitted during operation. On the other hand, the reinforcing rod 6 itself has a certain mass and rigidity, and can be used as a mass element of the dynamic vibration absorber, forming a dynamic vibration absorption system with the tool holder body 1, further broadening the vibration reduction frequency band.

[0059] When the cross notch 61 and tapered threaded plug 63 structure is used, the radial tension at the rear end of the reinforcing rod 6 can eliminate the small gap between the reinforcing rod 6 and the mounting through hole 2, significantly improving the connection rigidity.

[0060] In another specific embodiment, the axial vent hole 5 on the damping block 4 has threaded lifting holes machined at both ends. When the damping block 4 needs to be replaced or maintained after long-term use, the operator first removes the cutting head 3 and the connecting block 31 at the front end of the tool holder, exposing the end face of the damping block 4 at the front end of the mounting through hole 2. Then, a special disassembly tool, such as a threaded rod, is screwed into the threaded lifting hole at the front end of the vent hole 5 of the damping block 4, so that the disassembly tool and the damping block 4 form a rigid connection. By tapping or axially pulling the disassembly tool, the friction between the rubber ring 41 or rubber sleeve 42 and the inner wall of the mounting through hole 2 can be overcome, and the damping blocks 4 can be removed one by one from the mounting through hole 2. If disassembly from the rear end is required, the reinforcing rod 6 is removed, and the disassembly tool is inserted from the rear end and screwed into the threaded lifting hole at the rear end of the damping block 4 for operation.

[0061] The beneficial effects of this implementation method are as follows: without changing the original structural dimensions of the damping block 4 or affecting the air pressure balancing function of the vent 5, it provides a convenient disassembly interface for the damping block 4. This solves the problem of the damping block 4 being difficult to remove due to friction from rubber parts or after long-term use, significantly improving the maintenance convenience of the tool holder and the reusability of parts.

[0062] This application significantly reduces material costs. It uses ordinary metal tubing as the main body of the tool holder 1 and inexpensive materials such as cast iron or carbon steel to make the damping block 4, replacing the expensive solid tungsten steel tool holder. This reduces material costs by more than 70%, making it affordable for a wide range of small and medium-sized processing enterprises.

[0063] Furthermore, it exhibits excellent vibration damping performance. Through the design of multi-segment damping blocks 4 with gradually varying lengths, combined with the elastic damping effect of rubber elements, and the axial pre-tightening and radial tensioning of the reinforcing rod 6, it can effectively suppress cutting vibration under overhang conditions of seven to eight times the diameter or more, significantly improving the surface finish and dimensional accuracy. The integrated coolant delivery design, achieved through the flow channel design within the reinforcing rod 6, the tool holder body 1, and the connecting block 31, enables coolant delivery from the tail of the tool holder to the tool head. Double sealing rings ensure the sealing of the high-pressure coolant, meeting the cooling requirements of high-efficiency cutting. The overall assembly process is simple. Adopting a modular design, each component can be manufactured separately and then assembled, eliminating the need for complex precision assembly equipment and sealing processes, making it suitable for mass production. Finally, it has a wide range of applications. By adjusting the material of the reinforcing rod 6 (steel, tungsten steel, or ceramic) and the configuration of the damping blocks 4, it can adapt to different length-to-diameter ratios and cutting conditions, demonstrating good versatility.

[0064] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A multi-section embedded damping vibration reduction turning tool based on a steel tube base body, characterized in that: It includes a tool holder body (1) made of metal tubing, the tool holder body (1) having a through mounting hole (2) along the axial direction, and the front end of the tool holder body (1) having a connection structure for detachably mounting a cutting head (3); Multiple damping blocks (4) are arranged sequentially in the mounting through hole (2) along the axial direction. Each damping block (4) is provided with a vent hole (5) that runs through the axial direction. The length of each damping block (4) decreases from the side near the front end of the tool bar body (1) to the side near the rear end of the tool bar body (1). The reinforcing rod (6) is fixedly connected to the rear end of the tool holder body (1) by an interference fit, and the front end of the reinforcing rod (6) abuts against the damping block (4) at the end through an annular pad (43); The rear end of the reinforcing rod (6) is provided with a cross notch (61) along the axial direction. The cross notch (61) divides the rear end of the reinforcing rod (6) into multiple radially elastically deformable lobes. The center of the cross notch (61) is provided with a tapered threaded hole (62). The tapered threaded hole (62) is internally threaded with a tapered threaded plug (63). The rear end of the tapered threaded plug (63) is provided with an internal hexagonal hole. The cutting head (3) is mounted on the front end of the connecting block (31). The rear end of the connecting block (31) is provided with a threaded protrusion (32), which is threadedly connected to the front end of the mounting through hole (2). The rear end face of the connecting block (31) is provided with an arc-shaped groove (33), and the side wall of the arc-shaped groove (33) is provided with a liquid spraying hole (34). The outlet of the liquid spraying hole (34) faces the cutting head (3). The side wall of the tool holder body (1) is provided with an L-shaped liquid inlet (35), and the inlet of the L-shaped liquid inlet (35) is located on the cutting head. The inner wall of the rod body (1) has the outlet of the L-shaped infusion hole (35) penetrating the front end face of the knife rod body (1) and connected to the arc groove (33) at the rear end of the connecting block (31); the front end of the reinforcing rod (6) is provided with an axially extending infusion groove (36), the side wall of the reinforcing rod (6) is provided with an outlet hole (37) communicating with the infusion groove (36), the outer side of the outlet hole (37) is provided with an annular groove (38) coaxial with the reinforcing rod (6), and the annular groove (38) is aligned with the inlet of the L-shaped infusion hole (35); Annular sealing grooves (39) are respectively provided on the outer circumferential surface of the reinforcing rods (6) on both sides of the annular groove (38), and each annular sealing groove (39) is embedded with an elastic sealing ring. Both ends of the damping block (4) are provided with the annular pad (43).

2. A multi-section embedded damping vibration reduction turning tool based on a steel tube substrate according to claim 1, characterized in that: An annular limiting groove is provided on the outer peripheral surface of the damping block (4), and a rubber ring (41) is embedded in the annular limiting groove.

3. The multi-segment embedded damping and vibration reduction turning tool based on a steel pipe matrix according to claim 1, characterized in that: The damping block (4) is covered with a rubber sleeve (42) on its outer side, and the rubber sleeve (42) completely covers the entire outer peripheral surface of the damping block (4).

4. The multi-segment embedded damping and vibration reduction turning tool based on a steel pipe matrix according to claim 1, characterized in that: The damping block (4) is covered with a rubber sleeve (42) on its outer side. The rubber sleeve (42) is symmetrically arranged at both ends of the damping block (4). The middle part of the damping block (4) is not covered and the diameter of the middle part is larger than the diameter of the covered parts at both ends of the damping block (4) and smaller than the outer diameter of the rubber sleeve (42) after it is covered.

5. The multi-segment embedded damping and vibration reduction turning tool based on a steel pipe matrix according to claim 1, characterized in that: The damping block (4) is covered with a rubber sleeve (42) on its outer side. The rubber sleeve (42) is located in the middle of the axial direction of the damping block (4). The two ends of the damping block (4) are not covered and the diameter of the two ends is greater than the diameter of the covered part in the middle of the damping block (4) and smaller than the outer diameter of the covered part after being covered by the rubber sleeve (42).

6. The multi-segment embedded damping and vibration reduction turning tool based on a steel pipe matrix according to claim 1, characterized in that: The ventilation hole (5) is provided with threaded lifting holes at both ends.

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