Spiral type supercharged tool holder

Abstract

The utility model relates to machining tool holder technical field discloses a spiral type supercharged tool holder, including tool holder main part, rotatable supercharged screw rod is equipped with in tool holder main part, the top of supercharged screw rod is equipped with tool holder interface through tool holder main part, the bottom of supercharged screw rod is equipped with tool holder clamping mechanism through tool holder main part, the water inlet, spiral water channel and water outlet that communicate in proper order are equipped with on supercharged screw rod, spiral water channel is located supercharged screw rod outer surface, and spiral water channel gradually reduces from top to bottom pitch. The utility model intends to integrate with tool holder itself to supercharged structure, and high -efficient production high pressure coolant simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of machining tool holder technology, specifically to a spiral pressure boosting tool holder. Background Technology

[0002] In machining, especially during deep hole drilling and milling, a significant amount of cutting heat is generated between the cutting tool and the workpiece. Excessive temperature significantly reduces tool durability, affects the quality and precision of the machined surface, and can even lead to tool breakage. The most common method for effectively controlling the temperature of the cutting zone is the use of coolant. Coolant needs to be continuously and stably delivered to the cutting edge of the tool to play a crucial role in cooling, lubrication, and chip removal. This is essential for ensuring machining efficiency, improving machining quality, and extending tool life.

[0003] Currently, most CNC machine tools and machining centers are equipped with built-in coolant systems. The conventional design involves an integrated coolant channel within the machine tool spindle. The coolant is pressurized by an external coolant pump, enters the central outlet channel inside the spindle through the spindle's rotary joint, and finally, via the tool holder connected to the spindle, is delivered to the outlet of the tool it holds. However, its performance largely depends on the pressure provided by the external coolant pump.

[0004] In the aforementioned design, to achieve a high jet velocity to penetrate the chip barrier formed during deep hole machining, a high-power, high-pressure external cooling pump is typically required. This not only increases the overall energy consumption and equipment cost but also brings greater noise and maintenance requirements. Moreover, the entire delivery path is long and involves many stages, resulting in significant pressure loss of the coolant during flow. The pressure reaching the tool surface is low, the coolant jet velocity is slow, and the impact force is weak, making it difficult to penetrate into critical parts of the tool such as the cutting edge. This leads to uneven cooling, insufficient cooling in some areas, and uneven wear of the tool due to localized overheating. Utility Model Content

[0005] The present invention aims to provide a spiral pressure boosting tool holder, which integrates the pressure boosting structure into the tool holder itself, and can efficiently generate high-pressure coolant.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A spiral pressure boosting tool holder includes a tool holder body, a pressure boosting screw rotatably disposed inside the tool holder body, a tool holder interface being provided at the top of the pressure boosting screw penetrating the tool holder body, and a tool clamping mechanism being provided at the bottom of the pressure boosting screw penetrating the tool holder body. The pressure boosting screw is provided with an inlet channel, a spiral channel and an outlet channel connected in sequence, the spiral channel being located on the outer surface of the pressure boosting screw, and the pitch of the spiral channel gradually decreasing from top to bottom.

[0007] The principle and advantages of this scheme are: 1. A spiral channel design has been added, with the pitch of the spiral channel gradually decreasing from top to bottom. When the spindle drives the booster screw to rotate at high speed, a strong centrifugal force is applied to the coolant in the spiral channel, giving it kinetic energy. As the spiral channel pitch decreases, at the same radial depth, its cross-sectional area gradually decreases along the direction of liquid flow, suppressing the coolant flow rate. Utilizing the fluid continuity equation and Bernoulli's principle, the kinetic energy of the coolant is efficiently converted into static pressure energy. Compared with traditional fixed cross-section channels, it can generate up to 3-5 times the local pressure increase, ensuring that the high-pressure coolant reaches the tool cutting area directly, achieving efficient cooling during deep hole machining and improving machining efficiency.

[0008] 2. The spiral water channel is set on the booster screw, which is located inside the tool holder body. The booster function is directly integrated inside the tool holder body, eliminating the need for a complex external high-pressure coolant supply unit. This simplifies the machine tool's peripheral facilities and saves equipment space and costs.

[0009] 3. The tool holder interface at the top of the booster screw is standardized, which can directly replace the existing standard tool holder. It can be used by installing it on a spindle with standard coolant function. Upgrading and modification are very convenient and easy to promote on existing machining centers.

[0010] Preferably, as an improvement, a connecting block is provided on one side of the tool holder body, and a stop pin is provided on the connecting block, which is connected to the stop block on the spindle.

[0011] Technical effect: The above-mentioned settings prevent the tool holder from rotating with the spindle, ensuring that the spindle's power is fully used to drive the internal booster screw, and avoiding vibration and safety risks caused by the tool holder's accidental rotation, thus ensuring the stability and reliability of the entire machining process.

[0012] Preferably, as an improvement, a screw sleeve is provided on the outside of the pressure boosting screw, the screw sleeve is located between the tool holder body and the pressure boosting screw, and the screw sleeve is fixedly connected to the tool holder body.

[0013] Technical effect: The above-mentioned configuration of this solution encloses the spiral water channel circumferentially, forming a sealed cavity in which the pressure gradually increases as the screw rotates, which facilitates the pressurization of the coolant in the spiral water channel.

[0014] Preferably, as an improvement, the two ends of the tool holder body are connected to the booster screw via bearings, and a sealing ring is provided on the opposite side of each of the two bearings, and the sealing ring is fixedly connected to the tool holder body.

[0015] Technical effect: The above-mentioned configuration in this solution ensures that the booster screw can rotate at high speed and smoothly with bearing support. The sealing ring is directly fixed to the tool holder body and forms a dynamic seal with the rotating booster screw, effectively preventing high-pressure coolant from leaking from both ends of the spiral water channel and protecting the bearing from coolant corrosion and contamination.

[0016] Preferably, as an improvement, the water inlet channel is coaxially arranged with the booster screw, the bottom of the water inlet channel is connected to the inlet of the spiral water channel, and the top of the water inlet channel passes through the booster screw and is connected to the outlet of the main shaft.

[0017] Technical benefits: The above-mentioned configuration in this solution, with its coaxial layout, is beneficial to the dynamic balance of the tool holder body, making it more stable during high-speed rotation. It also ensures that the coolant flows directly and smoothly from the spindle to the spiral channel, minimizing pressure loss and flow resistance. This allows the coolant to enter the spiral channel quickly and efficiently for pressurization, providing sufficient coolant for the subsequent cooling process.

[0018] Preferably, as an improvement, the water outlet is coaxially arranged with the booster screw, the top of the water outlet is connected to the outlet of the spiral water channel, and the bottom of the water outlet passes through the booster screw and is connected to the inlet of the cutter.

[0019] Technical benefits: The above-mentioned configuration in this solution, with its coaxial layout, is beneficial to the dynamic balance of the tool holder body, making it more stable during high-speed rotation. It also ensures that the coolant flows directly and smoothly from the spindle to the tool, minimizing pressure loss and flow resistance. This ensures that the pressurized coolant can be accurately and promptly delivered to the parts of the tool that require cooling, achieving effective cooling of the tool.

[0020] Preferably, as an improvement, the inlet and outlet of the spiral water channel are both located between two sealing rings.

[0021] Technical effect: The above-mentioned configuration completely encloses the entire pressurization area (from water inlet to water outlet) within a sealed space consisting of two sealing rings and a screw sleeve, thus preventing coolant leakage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection between the present invention and the main shaft.

[0023] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0025] Figure 4 This is a schematic diagram of the booster screw of this utility model.

[0026] The reference numerals in the accompanying drawings include: spindle 1, stop block 11, tool holder body 2, connecting block 21, stop pin 211, bearing 22, sealing ring 23, tool holder interface 3, booster screw 4, water inlet channel 41, spiral water channel 42, water outlet channel 43, screw sleeve 5, and tool clamping mechanism 6. Detailed Implementation

[0027] The following detailed description illustrates the specific implementation method: Example The basics are as follows: Figure 1-4 As shown: A spiral pressure boosting tool holder includes a tool holder body 2, a pressure boosting screw 4 rotatably disposed inside the tool holder body 2, and the two ends of the tool holder body 2 connected to the pressure boosting screw 4 via bearings 22. Each of the two bearings 22 has a sealing ring 23 on its opposite side, and the sealing ring 23 is fixedly connected to the tool holder body 2. The top of the pressure boosting screw 4 passes through the tool holder body 2 and has a tool holder interface 3, which is used to connect the tool holder body 2 to a spindle 1, so that the spindle 1 can drive the pressure boosting screw 4 to rotate. The bottom of the pressure boosting screw 4 passes through the tool holder body 2 and has a tool clamping mechanism 6, which is used to connect a tool for machining. The rotating pressure boosting screw 4 continues to drive the tool to rotate for machining.

[0028] The booster screw 4 is provided with a water inlet channel 41, a spiral water channel 42 and a water outlet channel 43 connected in sequence. The water inlet channel 41 is connected to the coolant water channel in the spindle 1. The coolant flows from the spindle 1 through the water inlet channel 41, the spiral water channel 42 and the water outlet channel 43, and finally enters the tool and is sprayed out from the tool's outlet to cool the tool.

[0029] Furthermore, the spiral channel 42 is located on the outer surface of the booster screw 4, and the pitch of the spiral channel 42 gradually decreases from top to bottom. The main shaft 1 drives the booster screw 4 to rotate at high speed, applying a strong centrifugal force to the coolant in the spiral channel 42, throwing the coolant outward, and at the same time giving the coolant kinetic energy. As the pitch of the spiral channel 42 gradually decreases, at the same radial depth, the cross-sectional area of ​​the spiral channel 42 gradually decreases along the direction of liquid movement, the flow rate of the coolant will be suppressed, and its kinetic energy will be converted into static pressure energy in a large amount, efficiently and continuously, and finally output high-pressure coolant.

[0030] A screw sleeve 5 is fitted around the outside of the booster screw 4. The screw sleeve 5 is located between the tool holder body 2 and the booster screw 4, and is fixedly connected to the tool holder body 2. The spiral sleeve 5 circumferentially seals the spiral water channel 42, making the spiral water channel 42 closed and preventing internal coolant leakage. Furthermore, the sealing rings 23 at both ends of the tool holder body 2 are fixedly connected to both ends of the screw sleeve 5, further preventing coolant leakage between the screw sleeve 5 and the booster screw 4.

[0031] It should be noted that the inlet and outlet of the spiral water channel 42 are both located between the two sealing rings 23, so that the two sealing rings 23 and the spiral outer sleeve can completely cover the spiral water channel 42 to prevent coolant leakage.

[0032] A connecting block 21 is provided on one side of the tool holder body 2. A stop pin 211 is provided on the connecting block 21. The stop pin 211 is connected to the stop block 11 on the spindle 1 to restrict the rotation of the tool holder body 2. When the spindle 1 drives the pressure screw 4 to rotate, it prevents the tool holder body 2 from rotating along with it.

[0033] The inlet channel 41 is coaxially arranged with the booster screw 4. The bottom of the inlet channel 41 is connected to the inlet of the spiral water channel 42, and the top of the inlet channel 41 passes through the booster screw 4 and connects to the outlet of the spindle 1. The outlet channel 43 is coaxially arranged with the booster screw 4. The top of the outlet channel 43 is connected to the outlet of the spiral water channel 42, and the bottom of the outlet channel 43 passes through the booster screw 4 and connects to the inlet of the cutting tool. The whole structure forms a channel for coolant. The coolant enters the inlet channel 41 from the spindle 1, is pressurized by the spiral water channel 42, enters the cutting tool from the outlet channel 43, and finally sprays out of the cutting tool to cool it down.

[0034] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A spiral pressure boosting tool holder, characterized in that: The tool includes a tool holder body, within which a pressure boosting screw is rotatably mounted. The top of the pressure boosting screw passes through the tool holder body and has a tool holder interface. The bottom of the pressure boosting screw passes through the tool holder body and has a tool clamping mechanism. The pressure boosting screw has an inlet channel, a spiral channel, and an outlet channel connected in sequence. The spiral channel is located on the outer surface of the pressure boosting screw, and the pitch of the spiral channel gradually decreases from top to bottom.

2. The spiral pressure boosting tool holder according to claim 1, characterized in that: A connecting block is provided on one side of the tool holder body, and a stop pin is provided on the connecting block. The stop pin is connected to the stop block on the spindle.

3. The spiral pressure boosting tool holder according to claim 1, characterized in that: The pressure boosting screw is fitted with a screw sleeve, which is located between the tool holder body and the pressure boosting screw, and is fixedly connected to the tool holder body.

4. A spiral pressure boosting tool holder according to claim 3, characterized in that: The two ends of the tool holder body are connected to the booster screw via bearings. Each of the two bearings has a sealing ring on its opposite side, and the sealing ring is fixedly connected to the tool holder body.

5. A spiral pressure boosting tool holder according to claim 1, characterized in that: The water inlet channel is coaxially arranged with the booster screw, the bottom of the water inlet channel is connected to the inlet of the spiral water channel, and the top of the water inlet channel passes through the booster screw and is connected to the outlet of the main shaft.

6. A spiral pressure boosting tool holder according to claim 1, characterized in that: The water outlet is coaxially arranged with the booster screw, the top of the water outlet is connected to the water outlet of the spiral water channel, and the bottom of the water outlet passes through the booster screw and is connected to the water inlet of the cutter.

7. A spiral pressure boosting tool holder according to claim 5 or 6, characterized in that: The inlet and outlet of the spiral water channel are both located between two sealing rings.

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