Side clamping type tool holder for shockproof deep hole milling

Abstract

This invention relates to the field of milling cutter holder technology, and more particularly to a shock-resistant, side-locked milling cutter holder for deep hole milling. It includes a cutter holder body and a lower end cap, which are detachably connected. A connecting stud is provided at the bottom of the cutter holder body. Locking screw holes are provided on both sides of the lower end cap, with locking bolts for fixing inside the holes. Multiple guide pins are inserted into the bottom of the lower end cap, slidably connected to it, and a spring is provided at the end of each guide pin inside the lower end cap. A support ring is provided below the lower end cap, and the bottom ends of all guide pins are fixed to the support ring. Four adapter blocks are provided on the inner wall of the support ring. This device improves the strength of the connection between the milling cutter and the cutter holder body by connecting the milling cutter to the cutter holder body through a threaded connection. Simultaneously, the clamping strips on both sides further fix the milling cutter, reducing the gap between the milling cutter and the cutter holder, thereby improving the fixing effect of the milling cutter and the cutter holder.

Description

Technical Field

[0001] This invention relates to the field of milling cutter holder technology, and more particularly to a side-locking cutter holder for deep hole milling with shock resistance. Background Technology

[0002] A side-locking tool holder is a tool holder used to clamp cutting tools on machine tools (such as milling machines and machining centers). Its main feature is that the tool is clamped by a fixing device on the side, usually by using screws on the side to firmly fix the tool in the mounting hole on the side of the tool holder.

[0003] When performing deep hole milling, the length of the milling cutter protruding from the tool holder is relatively long. Furthermore, since it is only fixed by side screws, there is still a gap between the inner ring surfaces of the milling cutter holder. Therefore, during the cutting process, the tool may vibrate, resulting in noise, reduced machining accuracy, and rapid tool wear. To address these issues, we propose a vibration-resistant side-fixed tool holder for deep hole milling. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies in deep hole milling, where the long length of the milling cutter protruding from the shank and the fact that it is only fixed by side screws, leaving gaps between the inner ring surfaces of the milling cutter shank, can cause tool vibration during cutting. This invention provides a vibration-resistant side-fixed tool holder for deep hole milling.

[0005] This invention is achieved through the following technical solution:

[0006] A shockproof, side-fixed tool holder for deep hole milling includes a tool holder body and a lower end cap, wherein the tool holder body and the lower end cap are detachably connected, and a connecting stud is provided at the bottom of the tool holder body.

[0007] Both sides of the lower end cover are provided with locking screw holes, and locking bolts for fixing are provided inside the locking screw holes. Multiple guide posts are inserted into the bottom of the lower end cover. The guide posts are slidably connected to the lower end cover, and the guide posts are staggered from the locking screw holes. A spring is provided at one end of the guide post inside the lower end cover.

[0008] A support ring is provided below the lower end cover. The bottom ends of all guide posts are fixedly connected to the support ring. Four adapter blocks are provided on the inner wall of the support ring, and the adapter blocks are slidably connected to the support ring.

[0009] In a preferred embodiment of the present invention, a connecting platform is provided at the lower end of the knife handle body, the lower end cover is threadedly connected to the connecting platform, and embossing is provided on the upper outer wall of the lower end cover to increase the friction of the lower end cover surface, thereby facilitating its screwing.

[0010] In a preferred embodiment of the present invention, a pressure strip is provided at the inner end of the locking bolt. The pressure strip is slidably installed on the inner wall of the lower end cover, thereby improving the strength of the milling tool after installation.

[0011] In a preferred embodiment of the present invention, a first limiting groove is provided on both sides of the connecting stud, the first limiting groove is disposed opposite to the pressure strip, and the first limiting groove is adapted to the upper section of the pressure strip.

[0012] In a preferred embodiment of the present invention, the bottom of the lower end cover is provided with guide grooves of the same number as the guide posts, the guide posts are inserted in the guide grooves, and the spring is located between the bottom surface of the guide groove and the end face of the guide post. The spring is provided to avoid hard contact between the side-fixed tool holder and the workpiece during milling.

[0013] In a preferred embodiment of the present invention, the number of guide posts and the number of guide grooves are both three to seven. The guide grooves are evenly distributed around the center of the lower end cover. The stability of the support ring during movement is improved by the cooperation of the guide grooves and guide posts.

[0014] In a preferred embodiment of the present invention, an annular groove is provided on the inner wall of the support ring, and the adapter block is installed in the groove. The adapter block can rotate inside the support ring, and at the same time, the adapter block is adapted to the groove on the outer wall of the milling cutter.

[0015] A milling cutter, a side-fixed tool holder for shockproof deep hole milling, includes a milling cutter body, a connecting screw hole at the mounting end of the milling cutter body, and second limiting grooves on both sides of the mounting end of the milling cutter body.

[0016] In a preferred embodiment of the present invention, the connecting screw hole is adapted to the connecting stud, and the second limiting groove is adapted to the lower section of the pressure bar. The connection between the connecting stud and the connecting screw hole improves the installation strength of the milling cutter body.

[0017] In a preferred embodiment of the present invention, after the milling cutter body is connected to the connecting stud, the second limiting groove is connected to the first limiting groove, so that the pressure strip can be engaged in the first limiting groove and the second limiting groove. At the same time, the connection status of the first limiting groove and the second limiting groove can be easily observed through the detachable lower end cover.

[0018] The beneficial effects of this invention are:

[0019] 1. This device connects the milling cutter to the tool holder body and improves the strength of the connection between the milling cutter and the tool holder body by means of threaded connection. At the same time, the milling cutter is fixed again by the pressure strips on both sides, reducing the gap between the milling cutter and the tool holder, thereby improving the fixing effect of the milling cutter and the tool holder.

[0020] 2. By setting a support ring, the lower end of the milling cutter is supported when the milling cutter is working, thereby reducing the vibration of the milling cutter during the cutting process, reducing noise and tool wear.

[0021] 3. During the installation of the milling cutter, the pressure strip is engaged in the first and second limiting grooves. The pressure strip further improves the firmness of the milling cutter connection. At the same time, it can prevent the milling cutter from being too tightly rotated with the connecting stud during operation, which would make it difficult to unscrew. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the side-locked tool holder for deep hole milling of the present invention;

[0023] Figure 2 This is a cross-sectional view of the side-locked tool holder for deep hole milling according to the present invention.

[0024] Figure 3 This is a schematic diagram of the connection structure between the guide rod and the lower end cap in the side-fixed tool holder for shockproof deep hole milling of the present invention;

[0025] Figure 4 This is a schematic diagram of the support ring in the side-fixed tool holder for shockproof deep hole milling according to the present invention;

[0026] Figure 5 This is a schematic diagram of the main structure of the milling cutter used in the side-fixed tool holder for shockproof deep hole milling of the present invention.

[0027] In the diagram: 1. Tool holder body; 11. Connecting platform; 12. Connecting stud; 121. First limiting groove; 2. Lower end cover; 21. Locking screw hole; 22. Locking bolt; 23. Pressure strip; 24. Guide post; 25. Support ring; 251. Adaptor block; 252. Slide groove; 26. Guide groove; 27. Spring; 3. Milling cutter body; 31. Connecting screw hole; 32. Second limiting groove. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention. The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding the present invention, and not for limiting the present invention.

[0029] like Figure 1-5The image shows a shockproof, side-locked tool holder for deep hole milling, comprising a tool holder body 1 and a lower end cap 2. The upper end of the tool holder body 1 is the connection end to an external milling machine, consistent with conventional tool holders. The lower end of the tool holder body 1 is provided with a stepped connecting platform 11, which has external threads. The lower end cap 2 is threaded to the connecting platform 11. At the same time, the upper outer wall of the lower end cap 2 is provided with embossing, which increases the friction of the surface of the lower end cap 2, thus making it easier to screw it. The bottom end of the tool holder body 1 is also provided with a connecting stud 12, which is located at the lower end of the connecting platform 11.

[0030] Among them, the milling cutter for the side-fixed tool holder for shockproof deep hole milling includes a milling cutter body 3. The mounting end of the milling cutter body 3 is provided with a connecting screw hole 31, and the two sides of the mounting end of the milling cutter body 3 are provided with second limiting grooves 32. The connecting screw hole 31 is adapted to the connecting stud 12. The milling cutter body 3 is initially fixed by fixing the milling cutter body 3 on the connecting stud 12. Compared with the current method of directly fixing the milling cutter to the lower end of the tool holder with screws, this method connects the milling cutter body 3 and the tool holder body 1, improving the connection strength.

[0031] Secondly, locking screw holes 21 are provided on both sides of the lower end cover 2. Locking screws 22 for fixing are provided inside the locking screw holes 21. The locking screws 22 can rotate and move in the locking screw holes 21. A pressure strip 23 is provided at the inner end of the locking screws 22. The pressure strip 23 is slidably installed on the inner wall of the lower end cover 2. By rotating the locking screws 2, the locking screws 22 drive the pressure strip 23 to press the milling cutter body 3. The pressure strip 23 further improves the strength of the milling cutter after installation. In addition, by fixing the milling cutter body 3 on both sides, the concentricity of the milling cutter body 3 and the tool holder body 1 is improved.

[0032] Both sides of the connecting stud 12 are provided with a first limiting groove 121. The first limiting groove 121 is arranged opposite to the pressure strip 23. The first limiting groove 121 is adapted to the upper section of the pressure strip 23, and the second limiting groove 32 is adapted to the lower section of the pressure strip 23. The entire pressure strip 23 can be snapped into the first limiting groove 121 and the second limiting groove 23.

[0033] Furthermore, three guide posts 24 are inserted into the bottom of the lower end cover 2, and the bottom of the lower end cover 2 has the same number of guide grooves 26 as the guide posts 24. The guide posts 24 are staggered from the locking screw holes 21, and a spring 27 is provided at one end of the guide post 24 inside the lower end cover 2. The guide post 24 is inserted into the guide groove 26 and is slidably connected to the lower end cover 2. The spring 27 is located between the bottom surface of the guide groove 26 and the end face of the guide post 24. The spring 27 is provided to avoid hard contact between the side-fixed tool holder and the workpiece during milling.

[0034] It should be noted that the guide grooves 26 are evenly distributed around the center of the lower end cover 2. The stability of the support ring 25 when it moves is improved by the cooperation between the guide grooves 26 and the guide post 24.

[0035] Meanwhile, a support ring 25 is also provided below the lower end cover 2. The support ring 25 is concentrically arranged with the lower end cover 2. The bottom ends of all guide posts 24 are fixedly connected to the support ring 25. Four adapter blocks 251 are provided on the inner wall of the support ring 25. The adapter blocks 251 are slidably connected to the support ring 25. An annular groove 252 is opened on the inner wall of the support ring 25. The adapter blocks 251 are installed in the groove 252 and can rotate inside the support ring 25. At the same time, the adapter blocks 251 are adapted to the groove on the outer wall of the milling cutter body 3. By making the adapter blocks 251 sequentially snap onto the outer wall of the milling cutter body 3, when the milling cutter body 3 rotates, the adapter blocks 251 rotate with it. Thus, the milling cutter body 3 is supported by the adapter blocks 251 and the support ring 25, reducing its vibration.

[0036] It should be noted that after the milling cutter body 3 is connected to the connecting stud 12, the second limiting groove 32 is connected to the first limiting groove 121, which facilitates the clamping strip 23 to be engaged in the first limiting groove 121 and the second limiting groove 32. At the same time, the connection status of the first limiting groove 121 and the second limiting groove 32 can be easily observed through the detachable lower end cover 2. By engaging the clamping strip 23 in the first limiting groove 121 and the second limiting groove 32, the connection of the milling cutter body 3 is further improved. At the same time, it can prevent the milling cutter body 3 from being rotated too tightly with the connecting stud 12 during operation, which would make it difficult to unscrew. It can also prevent it from detaching from the connecting stud 12.

[0037] In this embodiment, when installing the milling cutter body 3, the lower end cover 2 is removed, and the milling cutter body 3 is installed on the connecting stud 12, so that the first limiting groove 121 is connected to the second limiting groove 32. Then, the lower end cover 2 is installed on the tool holder body 1 (after the lower end cover 2 is installed, the pressure strip 23 is set opposite to the first limiting groove 121 and the second limiting groove 32). The locking bolt 22 is rotated, and the locking bolt 22 drives the pressure strip 23 to move inward, so that it is located in the first limiting groove 121 and the second limiting groove 32, and at the same time, the milling cutter body 3 is pressed and fixed.

[0038] During the installation of the lower end cap 2, four adapter blocks 251 need to be respectively snapped into the four grooves (chip removal grooves) on the outer wall of the milling cutter body 3. The support ring 25 and the adapter blocks 251 support the milling cutter body 3, thereby reducing the vibration of the milling cutter body 3 during the cutting process, reducing noise and tool wear. Furthermore, the support ring 25 helps the milling cutter body 3 remain stable when it initially contacts the workpiece, facilitating cutting.

[0039] It should be noted that the parts not covered in this invention are the same as or can be implemented using existing technologies; the various drives in this invention can be implemented using corresponding power structures such as cylinders, hydraulic cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0040] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., 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 the present invention based on the specific circumstances.

[0041] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the 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 all fall within the scope of protection of the present invention.

Claims

1. A shock-resistant, side-locked tool holder for deep hole milling, comprising a tool holder body (1) and a lower end cap (2), characterized in that: The handle body (1) is detachably connected to the lower end cover (2), and a connecting stud (12) is provided at the bottom of the handle body (1); Both sides of the lower end cover (2) are provided with locking screw holes (21), and the inside of the locking screw holes (21) is provided with locking bolts (22) for fixing. Multiple guide posts (24) are inserted into the bottom of the lower end cover (2). The guide posts (24) are slidably connected to the lower end cover (2), and the guide posts (24) are staggered from the locking screw holes (21). A spring (27) is provided at one end of the guide post (24) inside the lower end cover (2). A support ring (25) is provided below the lower end cover (2). The bottom ends of all guide posts (24) are fixedly connected to the support ring (25). Four adapter blocks (251) are provided on the inner wall of the support ring (25). The adapter blocks (251) are slidably connected to the support ring (25).

2. The anti-vibration side-locking tool holder for deep hole milling according to claim 1, characterized in that: The lower end of the handle body (1) is provided with a connecting platform (11), the lower end cover (2) is threadedly connected to the connecting platform (11), and the upper outer wall of the lower end cover (2) is provided with embossing.

3. The anti-vibration side-locking tool holder for deep hole milling according to claim 1, characterized in that: The inner end of the locking bolt (22) is provided with a pressure strip (23), which is slidably installed on the inner wall of the lower end cover (2).

4. The anti-vibration side-locking tool holder for deep hole milling according to claim 3, characterized in that: Both sides of the connecting stud (12) are provided with a first limiting groove (121), the first limiting groove (121) is arranged opposite to the pressure strip (23), and the first limiting groove (121) is adapted to the upper section of the pressure strip (23).

5. The anti-vibration side-locking tool holder for deep hole milling according to claim 1, characterized in that: The bottom of the lower end cover (2) has the same number of guide grooves (26) as the guide posts (24). The guide posts (24) are inserted in the guide grooves (26), and the spring (27) is located between the bottom surface of the guide groove (26) and the end face of the guide post (24).

6. The anti-vibration side-locking tool holder for deep hole milling according to claim 5, characterized in that: The number of guide posts (24) and the number of guide grooves (26) are both three to seven, and the guide grooves (26) are evenly distributed around the center of the lower end cover (2).

7. The anti-vibration side-locking tool holder for deep hole milling according to claim 1, characterized in that: The inner wall of the support ring (25) is provided with an annular groove (252), and the adapter block (251) is installed in the groove (252).

8. A milling cutter, used in the side-locked tool holder for anti-vibration deep hole milling as described in any one of claims 1-7, characterized in that: The milling cutter body (3) is provided with a connecting screw hole (31) at the mounting end of the milling cutter body (3), and a second limiting groove (32) is provided on both sides of the mounting end of the milling cutter body (3).

9. A milling cutter according to claim 8, characterized in that: The connecting screw hole (31) is adapted to the connecting stud (12), and the second limiting groove (32) is adapted to the lower section of the pressure strip (23).

10. A milling cutter according to claim 9, characterized in that: After the milling cutter body (3) is connected to the connecting stud (12), the second limiting groove (32) is connected to the first limiting groove (121).

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