Cooling knife handle structure

Abstract

The utility model belongs to the technical field of cutter cooling, and particularly relates to a cooling cutter handle structure which comprises a cutter handle, a cutter bar, a rectifier, a tensioning screw and an adjusting valve. A mounting cavity, a cooling runner, a vortex channel and an air outlet channel which communicate with one another are arranged in the tensioning screw, the cooling runner and the vortex channel are located on the two sides of the mounting cavity, and the cooling runner is used for communicating with a cooling channel in the tool bit; a high-pressure gas inlet communicated with the mounting cavity is formed in one end, far away from the tool bit, of the tensioning screw; the rectifier is arranged in the mounting cavity, a vortex chamber is arranged on the end face of the rectifier and communicates with the vortex channel, a plurality of airflow channels are arranged around the vortex chamber in the circumferential direction, the mounting cavity communicates with the vortex chamber through the airflow channels, and a cold end channel communicating with the cooling flow channel and the vortex channel is arranged in the rectifier; the adjusting valve is located at the end of the vortex channel and used for adjusting the air outlet area of the air outlet channel. Normal-temperature and high-pressure gas can be converted into low-temperature and high-pressure gas to be output, and the cooling effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of cutting tool cooling technology, and specifically relates to a cooling tool holder structure. Background Technology

[0002] During machining processes (such as cutting, milling, and drilling), the intense friction between the cutting tool, workpiece, and chips, as well as material deformation, generates a large amount of heat, known as cutting heat. Cutting heat causes a rapid increase in tool temperature, leading to a decrease in tool material hardness and wear resistance, accelerated wear, and even thermal cracking or chipping, thus shortening tool life. Furthermore, high temperatures cause thermal expansion and deformation of the workpiece material, affecting dimensional accuracy, and the high temperature in the cutting zone may cause chips to adhere to the tool, exacerbating surface roughness. Therefore, during machining, it is necessary to cool the cutting area to reduce cutting temperature, minimize tool wear, and improve machining quality.

[0003] Currently, the common cooling methods are liquid cooling and gas cooling. Liquid cooling involves spraying coolant directly onto the machined surface; however, large amounts of coolant splashing can contaminate the machine tool and working environment. The cost of treating coolant and waste coolant is high, and the evaporation of waste coolant can harm worker health. Gas cooling is generally used in situations where liquid cooling is not feasible. It typically involves blowing high-pressure gas into the cutting area to remove cutting heat. However, high-pressure gas is mostly at room temperature and quickly reaches thermal equilibrium after absorbing heat, making it difficult to remove the high temperature from the cutting zone, resulting in poor cooling performance. Utility Model Content

[0004] This invention provides a cooling tool holder structure to solve the technical problem of poor cooling effect of existing gas cooling methods.

[0005] To solve the above problems, the present invention provides a cooling tool holder structure with the following technical solution:

[0006] A cooling tool holder structure includes a tool holder, a tool bar, a rectifier, a tensioning screw, and a regulating valve;

[0007] The tool holder is coaxially connected to the tool shank;

[0008] The tensioning screw is coaxially and sealed within the tool holder. The tensioning screw contains an interconnected mounting cavity, a cooling channel, a vortex channel, and an exhaust channel. The cooling channel and vortex channel are located on both sides of the mounting cavity. The cooling channel is used to communicate with the cooling channel on the tool head. The end of the tensioning screw furthest from the tool head is provided with a high-pressure gas inlet that communicates with the mounting cavity.

[0009] The rectifier is installed in the mounting cavity. A vortex chamber is provided at the end face of the rectifier. The vortex chamber is connected to the vortex channel. Multiple airflow channels are arranged around the vortex chamber. The airflow channels connect the mounting cavity and the vortex chamber. The interior of the rectifier is provided with a cold end channel that is connected to both the cooling channel and the vortex channel.

[0010] The regulating valve is coaxially connected to the end of the tensioning screw away from the cutter head and located at the end of the vortex channel, and is used to adjust the air outlet area of ​​the air outlet channel;

[0011] Both the handle and the shaft are equipped with hot air outlets that correspond to and are connected to the air outlet channels.

[0012] Furthermore, the regulating valve is threadedly connected to the tensioning screw.

[0013] Furthermore, the regulating valve includes an integrally formed conical stop section, an adjusting section, and a connecting section. The maximum outer diameter of the conical stop section is smaller than the inner diameter of the vortex channel, and the outer diameter of the adjusting section matches the inner diameter of the vortex channel. The adjusting section is located at the air outlet channel and is sealed to the inner wall of the tightening screw. The connecting section is threadedly connected to the tightening screw. When the connecting section is screwed on, the adjusting section moves axially to change the area of ​​its obstruction of the air outlet channel.

[0014] Furthermore, a tool interface is provided at one end of the back-adjustment section of the connecting section.

[0015] Furthermore, the rectifier is a variable diameter structure, including a large diameter section and a small diameter section arranged coaxially. The large diameter section is sealed to the cavity wall of the mounting cavity, and the outer diameter of the small diameter section is smaller than the inner diameter of the mounting cavity. An airflow port communicating with the high-pressure gas inlet is opened on the cavity wall of the mounting cavity at the position corresponding to the small diameter section.

[0016] Furthermore, the rectifier is integrally formed with the tensioning screw.

[0017] Furthermore, multiple high-pressure gas inlets are arranged in a circular array around the axis of the tool holder.

[0018] Furthermore, the air outlet channels are arranged in a circular array around the axis of the tool holder.

[0019] Furthermore, the airflow channel is a straight channel, and the included angle between any two adjacent airflow channels is the same and is an acute angle.

[0020] The beneficial effects of this utility model are:

[0021] When the cutting head is installed and cutting operations are performed, the cooling tool holder structure of this utility model introduces room temperature high-pressure gas into the high-pressure gas inlet. The high-pressure gas enters the mounting cavity through the high-pressure gas inlet and enters the vortex chamber along the various gas channels on the rectifier. The resulting high-pressure rotating airflow enters the vortex channel and moves towards the regulating valve. After reaching the regulating valve, the high-pressure airflow that is not blocked by the regulating valve is discharged from the outlet channel, while the high-pressure airflow that is blocked by the regulating valve turns back. The returning high-pressure airflow exchanges energy with the original airflow, thereby achieving the following: high-temperature gas flows out from the outlet channel, while low-temperature vortex gas flows into the cooling channel of the tensioning screw through the cold end channel of the rectifier and finally enters the cooling channel of the cutting head. When the low-temperature high-pressure gas is injected into the cutting part, it can quickly absorb heat and achieve cooling.

[0022] The cooling tool holder structure of this invention can convert the input room temperature high pressure air into low temperature high pressure air output, which improves the cooling effect. In actual processing, it can reduce tool wear, ensure tool life and workpiece processing quality.

[0023] The cooling tool holder structure of this utility model integrates the tool holder, tool bar, rectifier, tension screw and regulating valve into one compact structure, which does not require an external cooling structure; each structure can be manufactured and assembled separately, which facilitates disassembly and maintenance after long-term use. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the cooling tool holder structure of this utility model;

[0025] Figure 2 for Figure 1 The right-side view;

[0026] Figure 3 for Figure 2 AA section view;

[0027] Figure 4 A schematic diagram of the assembled structure of the tension screw, rectifier, and regulating valve;

[0028] Figure 5 for Figure 4 The right-side view;

[0029] Figure 6 for Figure 4 BB section view;

[0030] Figure 7 for Figure 4 CC section view;

[0031] Figure 8 This is a three-dimensional structural diagram of a control valve;

[0032] Figure 9 This is a schematic diagram of the rectifier's three-dimensional structure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Tool holder; 11. Tool holder hot air outlet; 2. Tool shank; 21. Tool shank hot air outlet; 3. Rectifier; 31. Large diameter section; 32. Small diameter section; 33. Vortex chamber; 34. Airflow channel; 35. Cold end channel; 4. Tensioning screw; 41. Vortex channel; 42. Cooling channel; 43. Mounting cavity; 44. Inlet channel; 45. Outlet channel; 46. High-pressure gas inlet; 47. Air outlet; 48. First sealing ring groove; 5. Regulating valve; 51. Conical stop section; 52. Adjusting section; 521. Second sealing ring groove; 53. Connecting section; 531. Tool interface. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0037] An embodiment of a cooling tool holder structure provided by this utility model:

[0038] like Figure 1 and Figure 3 As shown, a cooling tool holder structure includes a tool holder 1, a tool bar 2, a rectifier 3, a tensioning screw 4, and a regulating valve 5.

[0039] Among them, such as Figure 3 As shown, the tool holder 2 is a hollow rod, coaxially connected to the tool shank 1, and the front end of the tool holder 2 has an interface for engaging with the tapered shank on the tool head.

[0040] The tension screw 4 is coaxially mounted inside the tool holder 2, such as... Figure 4 As shown, the tension screw 4 has multiple spaced-apart first sealing ring grooves 48 on its axial direction. First O-ring seals are installed within the first sealing ring grooves 48 to achieve a sealing fit between the tension screw 4 and the tool holder 2. The front end of the tension screw 4 has an external thread section for threaded connection with the tool head; as shown... Figure 2 and Figure 5 As shown, the rear end face of the tension screw 4 has four high-pressure gas inlets 46 arranged in a circular array. Figure 6As shown, the tightening screw 4 has an internally connected mounting cavity 43, cooling channel 42, vortex channel 41, and air outlet channel 45, wherein the cooling channel 42 and vortex channel 41 are located on the front and rear sides of the mounting cavity 43, respectively. Figure 7 As shown, the tension screw 4 has four air intake channels 44 extending along its axial direction. Each of the four air intake channels 44 is connected to one of the four high-pressure gas inlets 46. The cavity wall of the mounting cavity 43 has four air outlets 47, which are connected to the four air intake channels 44. The exhaust channels 45 are arranged in a circular array around the axis of the tool holder.

[0041] The rectifier 3 is housed in the mounting cavity 43. In actual manufacturing, the rectifier 3 and the tensioning screw 4 are integrally manufactured using 3D printing additive manufacturing technology. The rectifier 3 has a variable diameter structure, such as... Figure 9 As shown, the mounting cavity 43 includes a large-diameter section 31 and a small-diameter section 32 arranged coaxially. The outer diameter of the large-diameter section 31 matches the inner diameter of the mounting cavity 43, while the outer diameter of the small-diameter section 32 is smaller than the inner diameter of the mounting cavity 43, thus forming an annular gap between the small-diameter section 32 and the cavity wall of the mounting cavity 43. Four airflow ports 47 are located at positions corresponding to the small-diameter section 32, meaning that when high-pressure gas is introduced from the high-pressure gas inlet 46, it can enter the aforementioned annular gap.

[0042] A vortex chamber 33 is provided at the rear end face of the small-diameter section 32, and the vortex chamber 33 is connected to the vortex channel 41. Multiple airflow channels 34 are arranged circumferentially around the vortex chamber 33 at the rear end face of the small-diameter section 32, connecting the aforementioned annular gap to the vortex chamber 33. The airflow channels 34 are straight channels, and the included angle between any two adjacent airflow channels 34 is the same and is always an acute angle. The rectifier 3 has a cold end channel 35 inside that communicates with both the cooling channel 42 and the vortex channel 41.

[0043] like Figure 6 As shown, the regulating valve 5 is threaded to the rear end of the tensioning screw 4 and is located at the rear end of the vortex channel 41. Specifically, as... Figure 8As shown, the regulating valve 5 includes an integrally formed conical stop section 51, an adjusting section 52, and a connecting section 53. The maximum outer diameter of the conical stop section 51 is smaller than the inner diameter of the vortex channel 41. The top of the conical stop section 51 is horizontal, with a gap between it and the inner wall of the vortex channel 41. The outer diameter of the adjusting section 52 matches the inner diameter of the vortex channel 41. The adjusting section 52 has a second sealing ring groove 521, in which an O-ring is installed to achieve a sealing fit with the tensioning screw 4. The adjusting section 52 is positioned corresponding to the outlet channel 45, and its front end is rounded, allowing high-pressure gas to enter the outlet channel 45 through the top of the conical stop section 51 and the rounded portion of the adjusting section 52. The connecting section 53 is threadedly connected to the tensioning screw 4. The regulating valve 5 can adjust the air outlet area of ​​the air outlet channel 45. Specifically, by turning the connecting section 53, the regulating section 52 is moved axially to change the area of ​​the air outlet channel 45 it blocks. To facilitate the adjustment of the regulating valve 5, a tool interface 531 is provided at the rear end of the connecting section 53. The tool interface 531 is a hexagonal interface that can be used with a corresponding wrench to achieve quick adjustment.

[0044] The tool holder 2 is provided with a tool holder hot air outlet 21 that communicates with the corresponding air outlet channel 45, and the tool handle 1 is provided with a corresponding tool handle hot air outlet 11. During installation, the front end of the tension screw 4 is connected to the tool head for tightening. At this time, the cooling channel inside the tool head is connected to the cooling flow channel 42 inside the tension screw 4.

[0045] The cooling principle of the cooling handle structure of this utility model is as follows:

[0046] Normal temperature high pressure gas enters the annular gap between rectifier 3 and tension screw 4 through high pressure gas inlet 46. After being guided by each airflow channel 34, it enters the vortex chamber 33 tangentially. Since the outlet of the airflow channel 34 is circumferentially distributed, the high pressure airflow begins to accelerate and rotate around the circumference of the vortex chamber 33, forming a high pressure rotating airflow. Since the vortex channel 41 is connected to the vortex chamber 33, the high pressure rotating airflow moves towards the regulating valve 5. When the high-pressure rotating airflow reaches the regulating valve 5, the high-pressure airflow in the outer ring is not blocked by the conical stop section 51 and will directly enter the exhaust channel 45. Then it will escape into the air through the hot air outlet 21 of the tool holder and the hot air outlet 11 of the tool handle. However, the high-pressure airflow in the inner ring cannot flow out due to the obstruction of the conical stop section 51 and will flow back in the opposite direction. At this time, the inner ring high-pressure airflow with central backflow and the outer ring high-pressure airflow with reverse flow surrounding the inner ring high-pressure airflow are formed in the vortex channel 41. The inner ring high-pressure airflow and the outer ring high-pressure airflow exchange energy, so that the inner ring high-pressure airflow is cooled down when it flows in the vortex channel 41. The low-temperature inner ring high-pressure airflow flows back to the cold end channel 35 of the rectifier 3 and enters the tool head along the cooling channel 42, thereby cooling the cutting part.

[0047] The cooling tool holder structure of this invention can convert room temperature high-pressure gas into low temperature high-pressure gas. When the low temperature high-pressure gas is blown into the cutting part, it cools the tool, reduces tool wear, and ensures the tool's service life.

[0048] It should be noted that the number of high-pressure gas inlets 46 and outlet channels 45 is not limited to the four in the above embodiment. In actual processing and production, they can be reasonably set according to specific needs.

[0049] In other embodiments, the airflow channel 34 can also take other forms, such as an arc-shaped channel, a straight-arc hybrid channel, an Archimedean spiral channel, etc. The number of airflow channels 34 can also be reasonably set according to actual needs.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cooling tool holder structure, characterized in that, Includes tool holder, tool bar, rectifier, tension screw and regulating valve; The tool holder is coaxially connected to the tool shank; The tensioning screw is coaxially and sealed within the tool holder. The tensioning screw contains an interconnected mounting cavity, a cooling channel, a vortex channel, and an exhaust channel. The cooling channel and vortex channel are located on both sides of the mounting cavity. The cooling channel is used to communicate with the cooling channel on the tool head. The end of the tensioning screw furthest from the tool head is provided with a high-pressure gas inlet that communicates with the mounting cavity. The rectifier is installed in the mounting cavity. A vortex chamber is provided at the end face of the rectifier. The vortex chamber is connected to the vortex channel. Multiple airflow channels are arranged around the vortex chamber. The airflow channels connect the mounting cavity and the vortex chamber. The interior of the rectifier is provided with a cold end channel that is connected to both the cooling channel and the vortex channel. The regulating valve is coaxially connected to the end of the tensioning screw away from the cutter head and located at the end of the vortex channel, and is used to adjust the air outlet area of ​​the air outlet channel; Both the handle and the shaft are equipped with hot air outlets that correspond to and are connected to the air outlet channels.

2. The cooling tool holder structure according to claim 1, characterized in that, The regulating valve is threadedly connected to the tensioning screw.

3. The cooling tool holder structure according to claim 2, characterized in that, The regulating valve includes an integrally formed conical stop section, an adjusting section, and a connecting section. The maximum outer diameter of the conical stop section is smaller than the inner diameter of the vortex channel, and the outer diameter of the adjusting section matches the inner diameter of the vortex channel. The adjusting section is located at the air outlet channel and is sealed to the inner wall of the tightening screw. The connecting section is threaded to the tightening screw. When the connecting section is screwed on, the adjusting section moves axially to change the area of ​​its obstruction of the air outlet channel.

4. The cooling tool holder structure according to claim 3, characterized in that, A tool interface is provided at one end of the back adjustment section of the connecting section.

5. A cooling tool holder structure according to any one of claims 1-4, characterized in that, The rectifier is a variable diameter structure, including a large diameter section and a small diameter section arranged coaxially. The large diameter section is sealed to the cavity wall of the mounting cavity, and the outer diameter of the small diameter section is smaller than the inner diameter of the mounting cavity. An airflow port communicating with the high-pressure gas inlet is opened on the cavity wall of the mounting cavity at the position corresponding to the small diameter section.

6. The cooling tool holder structure according to claim 5, characterized in that, The rectifier and the tensioning screw are integrally formed.

7. A cooling tool holder structure according to any one of claims 1-4, characterized in that, The high-pressure gas inlets are arranged in a circular array around the axis of the tool holder.

8. A cooling tool holder structure according to any one of claims 1-4, characterized in that, The air outlet channels are arranged in a circular array around the axis of the tool holder.

9. A cooling tool holder structure according to any one of claims 1-4, characterized in that, The airflow channel is a straight channel, and the included angle between any two adjacent airflow channels is the same and is an acute angle.

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