A CNC lathe tool installation structure

Abstract

This patent application discloses a tool mounting structure for a CNC lathe, including a tool holder, a mounting groove for mounting a tool on the tool holder, a clamping assembly for clamping the tool and a cooling assembly for cooling the tool provided in the mounting groove, the middle portion of each clamping member being hinged to the inner wall of the mounting groove, and a first spring being provided between each clamping member and the inner wall of the mounting groove, the first spring being in an initial state, a plurality of clamping members enclosing together to form a tapered cylinder with a larger front end and a smaller rear end, a limiting portion being provided on the clamping member, and the tool being inserted into the tapered cylinder and cooperating with the limiting portion to limit the axial movement of the tool. The present invention provides a cooling chamber on the tool holder, wherein the coolant in the cooling chamber first flows into the mounting groove to cool the interior of the tool, and then flows to the outer end of the tool, thereby achieving overall cooling of the tool and uniform heat dissipation of the tool.

Description

Technical Field

[0001] The present invention relates to the technical field of tool installation, and in particular to a tool installation structure for a numerically controlled lathe. Background Art

[0002] CNC lathe is the abbreviation of digital control lathe. It is an automated lathe equipped with a program control system, mainly used for cutting shaft parts or disc parts. In the process of using a tool to cut a workpiece, the tool will rub against the workpiece, which will cause the tool to heat up and easily accelerate the wear of the tool. Therefore, a cooling device is required to dissipate heat from the tool during processing. The current cooling device mainly uses external spray coolant. The existing coolant is set on one side of the tool. During cutting, the coolant sprays the outer end of the tool. Since the coolant can only spray the outer end of the tool, it cannot cool the inside of the tool, resulting in uneven heat dissipation. Moreover, because the coolant is set on one side, when cooling the tool, the side of the tool facing the coolant has a better cooling effect, while the side facing away from the coolant has a poorer cooling effect than the side facing the coolant, so that the tool is unevenly cooled, which is not conducive to the heat dissipation of the tool. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a tool mounting structure for a CNC lathe to solve the problem of uneven heat dissipation of the current CNC lathe tools.

[0004] The technical solutions adopted in the present invention are as follows:

[0005] A tool mounting structure for a CNC lathe comprises a tool holder, a mounting groove for mounting the tool is formed on the tool holder, a clamping assembly for clamping the tool and a cooling assembly for cooling the tool are provided in the mounting groove, the clamping assembly comprises a plurality of clamping members, the middle portion of each clamping member is hinged to the inner wall of the mounting groove, and a first spring is provided between each clamping member and the inner wall of the mounting groove, in an initial state of the first spring, the plurality of clamping members are combined to form a conical cylinder with a larger front end and a smaller rear end, the diameter of the front end of the conical cylinder is D1, the diameter of the rear end of the conical cylinder is D2, the diameter of the tool is d, D1>d>D2; a limiting portion is provided on the clamping member, and after the tool is inserted into the conical cylinder, the limiting portion cooperates to limit the axial movement of the tool; the cooling assembly comprises a cooling chamber filled with coolant, a plurality of through holes are provided between the cooling chamber and the mounting groove for connecting the two, a sealing member is provided in the through hole for sealing the through hole, and a driving member is provided on the clamping member for automatically opening the sealing member after the tool is inserted into the conical cylinder.

[0006] Principle of the present invention:

[0007] When the tool is inserted into the conical cylinder formed by the plurality of clamping members, the clamping member rotates with its middle portion as a fulcrum. During the rotation, the first spring is compressed, and the diameter of the front end of the conical cylinder gradually decreases, while the diameter of the rear end gradually increases, until the tool is fully inserted. At this time, the first spring is deformed, and the elastic force of the first spring causes the clamping member to press against the outer wall of the tool to clamp the tool, limiting the radial movement of the tool. At the same time, the cooperation between the limiting portion and the tool also limits the axial movement of the tool, thereby achieving the purpose of fixing the tool.

[0008] When the tool is inserted into the conical cylinder, the driving part on the clamping part opens the seal synchronously, so that the cooling chamber is connected with the mounting groove. The coolant flows from the cooling chamber into the mounting groove to cool the inside of the tool. The tool is placed vertically when in use. After the coolant flows into the mounting groove, the coolant flows along the tool to the outer end of the tool under the action of gravity, thereby cooling the entire tool and making the heat dissipation of the tool uniform.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. This solution sets a cooling chamber on the tool holder. When in use, you only need to open the seal to connect the cooling chamber with the mounting groove, and the coolant can flow into the mounting groove to cool the tool. Since the coolant first flows into the mounting groove, it can cool the inside of the tool and then flows to the outer end of the tool to achieve overall cooling of the tool and even heat dissipation of the tool.

[0011] 2. When installing the tool, just push the tool into the conical cylinder. When the tool is fully inserted into the conical cylinder, the axial and radial restrictions on the tool can be achieved under the joint action of the limit part, the first spring, and the clamping member to achieve the purpose of fixing the tool. This process of fixing the tool does not require the setting of an additional fixed clamping structure, and the installation is simple and convenient.

[0012] 3. In the initial state of this solution, the conical cylinder formed by the multiple clamping parts has a front end diameter larger than the diameter of the tool, which can play a guiding role when the tool is inserted for installation, realize rapid alignment of the tool, and help improve efficiency.

[0013] 4. When the tool is installed on the tool holder, the seal can be opened synchronously to connect the cooling chamber with the installation groove to cool the tool. This process realizes the installation and cooling in one step, which is convenient to use.

[0014] As a preferred embodiment of the present invention, the sealing member includes a sealing plug, a second spring is provided between the sealing plug and the through hole, and the driving member includes a push rod provided on the clamping member corresponding to the through hole, the push rod can be extended into the through hole to push the sealing plug outward, the diameter of the push rod is d1, the diameter of the through hole is d2, and d1 <d2。

[0015] Beneficial effects:

[0016] In this solution, when the push rod rotates outward synchronously with the clamping member, the push rod extends into the through hole to push the sealing plug outward, and the sealing plug is pushed to the top of the through hole. Since the diameter of the push rod is smaller than the diameter of the through hole, a channel is formed between the push rod and the through hole, so that the cooling chamber is connected with the mounting groove; after the tool is withdrawn, the push rod rotates inward synchronously with the clamping member, the push rod withdraws from the through hole, and the second spring rebounds to make the sealing plug re-seal the through hole, which can avoid leakage of coolant when the tool is not in use and cause waste. In addition, the second spring provided in this solution can further clamp the tool and improve the stability of the tool. Since the second spring is stretched when the push rod pushes the sealing plug outward, the elastic force of the second spring causes the sealing plug to generate an inward thrust on the push rod, thereby further clamping the tool, limiting the radial movement of the tool, and improving the stability of the tool.

[0017] As a preferred embodiment of the present invention, the inner side wall of the installation groove is provided with a connecting tube coaxially connected to the through hole, and the connecting tube is used to be sleeved on the top end of the push rod when the first spring is in the initial state.

[0018] Beneficial effects:

[0019] In this solution, when the push rod rotates synchronously with the clamping member, the push rod extends into the through hole along the connecting tube and pushes outward. The connecting tube guides the push rod, which can make the push rod more stable when rotating. At the same time, after the tool is installed, the free end of the connecting tube can be placed against the outer wall of the clamping member to improve the stability of the clamping member.

[0020] As a preferred embodiment of the present invention, the front end of the conical cylinder formed by the plurality of clamping members extends out of the mounting slot and after the tool is fully inserted into the conical cylinder, the protruding portion of the clamping member abuts against the side wall of the tool.

[0021] Beneficial effects:

[0022] In this solution, after the tool is installed, the part of the clamping member extending out of the mounting slot presses against the side wall of the tool. The part of the clamping member extending out of the mounting slot can support the tool. Since the tool is used to process the workpiece in cantilever processing, the tool will be subjected to a large radial force. The support of the tool by the protruding part of the clamping member can improve the cantilever strength of the tool and improve the stability during processing.

[0023] As a preferred embodiment of the present invention, the inner wall of the installation groove is evenly provided with a plurality of support rods perpendicular to the inner wall, and the free ends of the support rods can abut against the outer side wall of the clamping member.

[0024] Beneficial effects:

[0025] After the tool is installed, the clamping part is close to the inner wall of the installation groove. On the one hand, the support rod in this scheme can evenly support the outer wall of the clamping part to improve the stability of the clamping part. On the other hand, it can provide a flow channel for the coolant to facilitate the flow of coolant in the installation groove.

[0026] As a preferred embodiment of the present invention, a side of the clamping member close to the tool is provided with guide grooves staggered in horizontal and vertical directions.

[0027] Beneficial effects:

[0028] This solution sets up horizontal and vertical staggered guide grooves on the side of the clamping part close to the tool. On the one hand, it can allow the coolant in the installation groove to flow along the guide groove through the area where the clamping part and the tool are in contact, making the tool cooling more comprehensive. On the other hand, it can increase the friction between the clamping part and the tool to further improve the stability of the tool clamping.

[0029] As a preferred embodiment of the present invention, a plurality of guide holes are evenly distributed on the clamping member, and the guide holes are connected to the guide groove.

[0030] Beneficial effects:

[0031] The guide holes provided in this solution can increase the channels for the coolant to enter the guide groove, which is conducive to more comprehensive cooling of the tool.

[0032] As a preferred embodiment of the present invention, a limiting ring is provided at one end of the tool extending into the installation groove, and the limiting portion is an annular groove on the inner wall of the tapered cylinder formed by a plurality of clamping parts that cooperates with the limiting ring.

[0033] Beneficial effects:

[0034] When the tool is inserted into the conical cylinder, the annular groove rotates synchronously with the clamping part, and the diameter of the annular groove gradually increases until it engages with the limit ring. When the limit ring is engaged in the annular groove, the elastic force of the first spring causes the annular groove to generate an inward force, so that the annular groove is further pressed against the limit ring, thereby limiting the axial movement of the tool. This scheme achieves the purpose of axial limitation of the tool through the joint action of the annular groove, the limit ring, and the first spring, and the limiting method is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of an embodiment of the present invention;

[0036] Figure 2 is a cross-sectional view of an embodiment of the present invention when a tool is not installed;

[0037] Figure 3 is a cross-sectional view of a tool installed in an embodiment of the present invention;

[0038] Figure 4 yes Figure 3 Magnified view of area A in the middle.

[0039] Reference numerals include:

[0040] Tool holder 1, mounting groove 2, cooling chamber 3, liquid inlet pipe 4, clamping part 5, ear plate 6, first spring 7, push rod 8, through hole 9, connecting tube 10, sealing plug 11, second spring 12, support rod 13, guide groove 14, guide hole 15, annular groove 16, tool 17, limit ring 18, mounting block 19. DETAILED DESCRIPTION

[0041] Typical embodiments that embody the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations are intended to be illustrative rather than limiting.

[0042] In the description of this application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0043] See also Figure 1-3 As shown, this embodiment discloses a tool mounting structure for a CNC lathe, including a tool holder 1, a mounting groove 2 for mounting a tool 17 is opened on the tool holder 1, a clamping assembly for clamping the tool 17 is provided in the mounting groove 2, and the clamping assembly includes a plurality of clamping members 5. In this scheme, there are four clamping members 5. In the initial state without the tool 17 installed, the four clamping members 5 are enclosed to form a conical cylinder with a large front end and a small rear end. The diameter of the front end of the conical cylinder is D1, the diameter of the rear end of the conical cylinder is D2, the diameter of the tool 17 is d, D1>d>D2, the middle part of each clamping member 5 is hinged to the inner wall of the mounting groove 2, and a first spring 7 is provided between each clamping member 5 and the mounting groove 2. Specifically, an ear plate 6 is installed in the middle part of each clamping member 5, and a groove is opened on the inner wall of the mounting groove 2 at a position corresponding to the ear plate 6. A support rod is fixed with bolts in the groove, and the support rod and the ear plate 6 are connected by a rotating shaft. The clamping member 5 is divided into a front half and a rear half by the ear plate 6. A part of the front half of the clamping member 5 extends out of the mounting groove 2, and a first spring 7 is installed between the side of the rear half of the clamping member 5 close to the bottom of the mounting groove 2 and the mounting groove 2. In this solution, the first spring 7 is a compression spring, and three compression springs are evenly arranged along the length direction of the clamping member 5.

[0044] In the initial state, the four clamping members 5 enclose a tapered tube with a larger front end and a smaller rear end. When installing the tool 17, the tool 17 is inserted into the tapered tube, and the clamping member 5 rotates with the ear plate 6 as a fulcrum. The diameter of the tapered tube gradually decreases at the front end and increases at the rear end until the tool 17 is fully inserted. At this time, the first spring 7 is compressed, and the elastic force of the first spring 7 causes the inner side wall of the clamping member 5 to press against the outer side wall of the tool 17, clamping the tool 17 and limiting the radial movement of the tool 17. Because the tool 17 is cantilevered during machining, it will be subjected to a large radial force. The front half of the clamping member 5 partially extends out of the mounting slot 2 and presses against the side wall of the tool 17. This part of the clamping member 5 can support the tool 17, improve the cantilever strength of the tool 17, and thus improve stability during machining.

[0045] A limiting portion is provided on the clamping member 5, which is used to limit the axial movement of the tool 17 after the tool 17 is inserted into the conical cylinder. Specifically, a limiting ring 18 is formed integrally at one end of the tool 17 that extends into the mounting groove 2. The limiting portion is an annular groove 16 on the inner wall of the conical cylinder formed by the four clamping members 5 that cooperates with the limiting ring 18. When the tool 17 is inserted into the conical cylinder, the annular groove 16 rotates synchronously with the clamping member 5, and the diameter of the annular groove 16 gradually increases until it is engaged with the limiting ring 18. When the limiting ring 18 is engaged in the annular groove 16, the elastic force of the first spring 7 causes the annular groove 16 to generate an inward force, thereby further pressing the annular groove 16 against the limiting ring 18, thereby achieving limitation on the axial movement of the tool 17.

[0046] The installation groove 2 is further provided with a cooling component for cooling the tool 17. The cooling component includes an annular cooling cavity 3 which is arranged around the installation groove 2. A liquid inlet pipe 4 for conveying coolant is connected between the cooling cavity 3 and the outside, and a main valve is installed on the liquid inlet pipe 4. A plurality of through holes 9 for connecting the cooling cavity 3 and the installation groove 2 are formed between the cooling cavity 3 and the installation groove 2. Sealing members for blocking the through holes 9 are arranged in the through holes 9. A driving member for automatically opening the sealing member after the tool 17 extends into the conical cylinder is arranged on the clamping member 5. Specifically, the sealing member includes a plug 11 sealed and installed in the through hole 9. The plug 11 includes a cylindrical shape adapted to the through hole 9, and a flange is provided at one end of the cylindrical shape close to the cooling cavity 3. When sealing, the end face of the flange abuts tightly against the edge of the through hole 9. The driving member includes a push rod 8 fixed to the rear half of the clamping member 5 and corresponding to the through hole 9. The diameter of the push rod 8 is d1, and the diameter of the through hole 9 is d2, where d1 < d2. A connecting cylinder 10 coaxially connected to the through hole 9 is fixed to the inner side wall of the installation groove 2. In the initial state, the connecting cylinder 10 sleeves on the top end of the push rod 8. The push rod 8 extends into the through hole 9 along the connecting cylinder 10 and pushes the plug 11 outwards. The plug 11 is pushed into the cooling cavity 3. Since the diameter of the push rod 8 is smaller than the diameter of the through hole 9, a channel is formed between the push rod 8 and the through hole 9, enabling the cooling cavity 3 to communicate with the installation groove 2. By guiding the push rod 8 through the connecting cylinder 10, the push rod 8 can be made more stable during pushing. At the same time, after the tool 17 is installed, the free end of the connecting cylinder 10 can abut against the outer side wall of the clamping member 5 to improve the stability of the clamping member 5.

[0047] A second spring 12 is installed between the plug 11 and the through hole 9. Specifically, an installation block 19 is integrally formed on the inner wall of the through hole 9, and the second spring 12 is fixed between the plug 11 and the installation block 19. The second spring 12 is a tension spring. By setting the second spring 12, on the one hand, after the tool 17 is withdrawn, the second spring 12 can rebound to make the plug 11 re-block the through hole 9 to prevent the coolant from flowing out. On the other hand, the second spring 12 can further clamp the tool 17 to improve the stability of the tool 17. Since the second spring 12 is stretched when the push rod 8 pushes the plug 11 outwards, the elastic force of the second spring 12 generates an inward thrust on the push rod 8 by the plug 11, thereby further clamping the tool 17 and improving the stability of the tool 17.

[0048] After the tool 17 is installed, the clamping member 5 is close to the inner wall of the mounting groove 2. The inner wall of the mounting groove 2 corresponds to the position of the rear half of the clamping member 5 and is evenly fixed with a number of support rods 13 perpendicular to the inner wall. The free end of the support rod 13 can abut against the outer wall of the clamping member 5. By setting the support rod 13, on the one hand, it can be evenly supported on the outer wall of the clamping member 5 to improve the stability of the clamping member 5. On the other hand, it can provide a flow channel for the coolant to flow in the mounting groove 2. Further, the side of the clamping member 5 close to the tool 17 is staggered with guide grooves in the horizontal and vertical directions. 14. A plurality of guide holes 15 are evenly distributed on the clamping member 5, and the guide holes 15 are connected to the guide groove 14. The coolant in the mounting groove 2 flows from the guide holes 15 into the guide groove 14, and then flows along the guide groove 14 through the area where the clamping member 5 contacts the tool 17. The coolant is able to fully contact the tool 17 to fully cool the tool 17. At the same time, since the guide groove 14 is provided on the contact surface of the clamping member 5 and the tool 17, the friction between the clamping member 5 and the tool 17 is increased, and the stability between the tool 17 and the clamping member 5 can also be improved, which is beneficial to the fixation of the tool 17.

[0049] Specific implementation process:

[0050] Before installing the cutter 17, the main valve on the liquid inlet pipe 4 is in a closed state.

[0051] When installing the tool 17, push the tool 17 into the conical cylinder so that the limiting ring 18 on the tool 17 engages with the annular groove 16. At this time, the tool 17 is clamped, and the sealing plug 11 is pushed to the outside of the through hole 9. The through hole 9 connects the cooling chamber 3 and the installation groove 2.

[0052] After the tool 17 is installed, the tool 17 is located at the position where the workpiece needs to be processed, and then the workpiece is rotated to start cutting. During processing, the main valve is opened, and the coolant enters the cooling chamber 3 and flows through the through hole 9 into the installation groove 2 to cool the tool 17.

[0053] After the processing is completed or when the tool needs to be replaced, close the main valve. At this time, the coolant remaining in the cooling chamber 3 can cool the residual heat of the tool 17. After the tool 17 is cooled, remove the tool 17 and seal the through hole 9 again with the sealing plug 11 to avoid leakage of the coolant in the cooling chamber 3.

[0054] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A CNC lathe tool mounting structure, characterized by: The tool holder includes a mounting groove for mounting a tool, a clamping assembly for clamping the tool and a cooling assembly for cooling the tool provided in the mounting groove, the clamping assembly including a plurality of clamping members, the middle portion of each clamping member being hinged to the inner wall of the mounting groove, and a first spring being provided between each clamping member and the inner wall of the mounting groove, wherein in an initial state of the first spring, the plurality of clamping members enclose and form a tapered cylinder with a larger front end and a smaller rear end, the diameter of the tapered cylinder at the front end being D1, the diameter of the tapered cylinder at the rear end being D2, and the diameter of the tool being d, wherein D1>d>D2; a limiting portion being provided on the clamping member, and the tool cooperating with the limiting portion after being inserted into the tapered cylinder to limit the axial movement of the tool; The cooling assembly includes a cooling chamber filled with coolant, a plurality of through holes for connecting the cooling chamber and the mounting groove, a sealing member for sealing the through holes, and a driving member for automatically opening the sealing member after the tool is inserted into the tapered cylinder. The sealing member includes a sealing plug, a second spring is provided between the sealing plug and the through hole, and the driving member includes a push rod provided on the clamping member corresponding to the through hole, the push rod can be extended into the through hole to push the sealing plug outward, the diameter of the push rod is d1, the diameter of the through hole is d2, and d1 <d2。 2. The CNC lathe tool mounting structure according to claim 1, characterized in that: The inner side wall of the installation groove is provided with a connecting cylinder coaxially connected to the through hole, and the connecting cylinder is used to be sleeved on the top end of the push rod when the second spring is in the initial state.

3. The CNC lathe tool mounting structure according to claim 1, characterized in that: The front end of the conical cylinder formed by the plurality of clamping members extends out of the mounting groove and after the tool is fully inserted into the conical cylinder, the protruding portion of the clamping member is pressed tightly against the side wall of the tool.

4. The CNC lathe tool mounting structure according to claim 1, characterized in that: The inner wall of the installation groove is evenly provided with a plurality of support rods perpendicular to the inner wall, and the free ends of the support rods can abut against the outer side wall of the clamping member.

5. The CNC lathe tool mounting structure according to claim 1, characterized in that: A side of the clamping piece close to the tool is provided with guide grooves staggered in both horizontal and vertical directions.

6. The CNC lathe tool mounting structure according to claim 5, characterized in that: A plurality of guide holes are evenly distributed on the clamping piece, and the guide holes are connected to the guide groove.

7. The CNC lathe tool mounting structure according to claim 1, characterized in that: A limiting ring is provided at one end of the tool extending into the installation groove, and the limiting portion is an annular groove on the inner side wall of the tapered cylinder formed by a plurality of clamping parts and matched with the limiting ring.

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