Numerical control cutter capable of being telescopically adjusted

Abstract

The utility model provides a numerically-controlled cutter capable of being telescopically adjusted, and belongs to the technical field of numerically-controlled cutters. The numerically-controlled tool capable of being telescopically adjusted comprises a tool bit, a tool handle, a fixing sleeve and an adjusting ring, the tool bit extends on the rear side of a cutting thread to form a tool bit rod, and the tool handle is provided with a movable pipe in the axial direction of the center of the tool and faces the front side of the tool bit. The tool bit rod is inserted into the movable pipe for front-back sliding adjustment, so that the overall length of the numerical control tool is adjusted; the fixed sleeve is arranged at the open end of the movable pipe in a sleeving mode, the adjusting ring is arranged on the tool bit rod in a sleeving mode firstly during installation, the tool bit rod penetrates through the fixed sleeve from front to back to be connected with the movable pipe in a matched mode, and then the adjusting ring and the fixed sleeve are in threaded connection and matched to lock and fix the relative length distance between the tool bit and the tool handle. The length of the numerical control cutter can be adjusted in a telescopic mode, and the numerical control cutter is flexibly suitable for cutting holes with different depths and has the advantages of being high in practicability, simple in structure, convenient to maintain and capable of saving resources and reducing cost.

Description

Technical Field

[0001] This utility model belongs to the field of CNC cutting tool technology, and specifically relates to a retractable and adjustable CNC cutting tool. Background Technology

[0002] CNC cutting tools are tools used for cutting processes in mechanical manufacturing, also known as cutting tools. Existing CNC cutting tools usually have fixed dimensions and specifications, and need to be mounted on a CNC lathe to cut products. When it is necessary to machine holes of different sizes and depths on the same product, it is usually necessary to change CNC cutting tools of different lengths. The tedious operation of repeatedly disassembling and assembling on the CNC lathe greatly affects the product processing efficiency.

[0003] Patent application CN202321796145.8 discloses a retractable CNC cutting tool. It features a base with a cutting rod extending outwards from the base's inner cavity, allowing the rod to extend and retract. A piston is fixed at the top of the cutting rod, fitting into the base's inner cavity. Feeding rings are located at the top and bottom of the base. By controlling the liquid pressure supplied to the piston via these rings, the extension and retraction of the cutting rod can be controlled, enabling the CNC cutting tool to automatically adjust its length. The problem with this patent is that the hydraulic adjustment structure for achieving adjustable CNC cutting tool length is quite precise and complex, making it difficult or prohibitively expensive to implement on already slender CNC cutting tools, thus unsuitable for practical production and use. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a retractable and adjustable CNC cutting tool.

[0005] The objective of this utility model can be achieved through the following technical solution: A telescopically adjustable CNC cutting tool includes a cutting head, a cutting head shank, a fixed sleeve, and an adjusting ring; the cutting head extends to form a cutting head rod on the rear side of the thread cutting section; the cutting head shank has a movable tube along the central axis of the cutting tool on the front side facing the cutting head, and the outer diameter of the cutting head rod is equal to the inner diameter of the movable tube, allowing the cutting head rod to be inserted into the movable tube for back-and-forth sliding adjustment; the fixed sleeve is fitted onto one open end of the movable tube, and a collar is formed at the end of the fixed sleeve facing the cutting head shank; several locking plates are formed circumferentially at the other end, and a transition step is formed on the inner sidewall of the middle section of the locking plates, allowing for adjustment during installation. The movable tube extends into the fixed sleeve from the sleeve head ring until its top end abuts against the transition step. A deformation groove is formed between adjacent locking plates in the fixed sleeve, and a fixed external thread is formed on the outer wall of the fixed sleeve between the locking plates and the sleeve head ring. The adjusting ring has a positioning ring at one end facing the tool head, and an adjusting internal thread corresponding to the fixed external thread is formed on the inner wall of the other end. During installation, the adjusting ring is first sleeved on the tool head rod through the positioning ring. After the tool head rod passes through the fixed sleeve and the movable tube from front to back and is connected, the adjusting ring is rotated to make the adjusting internal thread and the fixed external thread cooperate with each other, so as to lock and fix the relative length between the tool head and the tool shank.

[0006] In the aforementioned retractable and adjustable CNC cutting tool, the tail end of the tool holder is provided with a square tenon to facilitate the tool being clamped on a CNC lathe.

[0007] In the aforementioned retractable and adjustable CNC cutting tool, the deformation groove has a buffer hole at the groove tail near the inner side.

[0008] In the aforementioned retractable and adjustable CNC cutting tool, the fixed sleeve locking plate has a gradually decreasing diameter tube on the outer wall of the tail end, forming a pressure-bearing inclined surface; the adjusting ring has a pressing inclined surface on the inner wall of the middle section, so that the inner diameter of the adjusting ring gradually decreases from the adjusting internal thread end to the positioning ring end.

[0009] Compared with the prior art, the telescopic adjustable CNC cutting tool provided by this utility model achieves the adjustment and fixation of the relative distance between the cutting tool head and the cutting tool holder through the cooperation of the fixed sleeve and the adjusting ring, thereby realizing the telescopic adjustment of the overall length of the CNC cutting tool. This makes the CNC cutting tool flexible and suitable for cutting processing when installed on a CNC lathe. It is highly practical, has a simple structure and is easy to operate. It is also easy to disassemble and replace parts after damage, effectively saving resources and reducing costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this retractable and adjustable CNC cutting tool;

[0011] Figure 2 This is a structural exploded view of this retractable and adjustable CNC cutting tool;

[0012] Figure 3 This is a cross-sectional view of the fixed sleeve and adjusting ring in this telescopic adjustable CNC cutting tool; in the figure above, 100 is the cutting tool head; 110 is the cutting tool shank; 200 is the cutting tool holder; 210 is the movable tube; 220 is the square tenon; 300 is the fixed sleeve; 310 is the sleeve ring; 320 is the fixed external thread; 330 is the locking plate; 331 is the pressure inclined surface; 332 is the transition step; 340 is the deformation groove; 341 is the buffer hole; 400 is the adjusting ring; 410 is the adjusting internal thread; 420 is the extrusion inclined surface; and 430 is the positioning ring. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0014] like Figures 1 to 3 As shown, this telescopic adjustable CNC cutting tool includes a cutting head 100, a cutting head 200, a fixed sleeve 300, and an adjusting ring 400. The cutting head 100 extends to form a cutting head shank 110 on the rear side of the thread-cutting section. The cutting head 200 has a movable tube 210 axially formed along the central axis of the cutting tool on the front side facing the cutting head 100. The outer diameter of the cutting head shank 110 is equal to the inner diameter of the movable tube 210, allowing the cutting head shank 110 to slide back and forth within the movable tube 210 to adjust the overall length of the CNC cutting tool. The fixed sleeve 300 is fitted onto the open end of the movable tube 210. During installation, the adjusting ring 400 is first fitted onto the cutting head shank 110. After the cutting head shank 110 passes through the fixed sleeve 300 and the movable tube 210 from front to back and connects, the adjusting ring 400 and the fixed sleeve 300 cooperate to lock and fix the relative length distance between the cutting head 100 and the cutting head shank 200.

[0015] like Figures 2 to 3 As shown, the fixed sleeve 300 has a collar 310 at one end facing the tool holder 200 as a guide and indicator structure. The inner diameter of the collar 310 is equal to the outer diameter of the movable tube 210. At the other end of the fixed sleeve 300, several locking pieces 330 are formed circumferentially around the central axis of the tool. A transition step 332 is formed on the inner side wall of the middle section of the locking piece 330. During installation, the movable tube 210 extends into the fixed sleeve 300 from the collar 310 until its top end abuts against the transition step 332. At this time, the fixed sleeve 300 is relatively fixed to the front end of the movable tube 210 of the tool holder 200. The tail end of the tool holder 200 is provided with a square tenon 220 to facilitate tool clamping on a CNC lathe.

[0016] The adjusting ring 400 has a positioning ring 430 at the end facing the cutting tool head 100. Because the fixed sleeve 300 has a certain thickness, the interaction of the cutting tool head 110, the fixed sleeve 300, and the adjusting ring 400 will create a gap between the outer wall of the cutting tool head 110 and the inner wall of the adjusting ring 400 at one end of the positioning ring 430. Therefore, the positioning ring 430 is provided to ensure the coaxiality and stability of the adjusting ring 400 during connection. The inner diameter of the positioning ring 430 is equal to the outer diameter of the cutting tool head 110. A deformation groove 340 is formed between adjacent locking pieces 330 on the fixed sleeve 300. A buffer hole 341 is formed at the end of the deformation groove 340 near the inner side to buffer the deformation of the fixed sleeve 300 during expansion and contraction. A fixing external thread 320 is formed between the locking piece 330 and the sleeve ring 310 on the outer wall of the fixed sleeve 300. The adjusting ring 400 has an adjusting internal thread 410 on its inner sidewall at the other end, which corresponds to the fixed external thread 320. By rotating the adjusting ring 400, the adjusting internal thread 410 and the fixed external thread 320 are engaged to lock and fix the relative length between the tool head 100 and the tool holder 200.

[0017] The locking plate 330 of the fixed sleeve 300 has a gradually decreasing diameter on the outer wall of the tail end, forming a pressure-bearing inclined surface 331; the adjusting ring 400 has a pressing inclined surface 420 on the inner wall of the middle section, so that the inner diameter of the adjusting ring 400 gradually decreases from the adjusting internal thread 410 end to the positioning ring 430 end. During the assembly of this telescopic adjustable CNC tool, the adjusting ring 400 is rotated to connect with the fixed sleeve 300, so that the adjusting ring 400 gradually moves towards the sleeve ring 310 end of the fixed sleeve 300. At this time, the pressing inclined surface 420 will cooperate with the pressure-bearing inclined surface 331 as the adjusting ring 400 moves forward, and apply an inward pressing force to reduce the gap of the deformation groove 340, so that several locking plates 330 circumferentially clamp the tool head 100 and the tool holder 200, thereby achieving relative fixation of the tool head 100 and the tool holder 200.

[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A telescopically adjustable CNC cutting tool, comprising a cutting head (100), a cutting shank (200), a fixing sleeve (300), and an adjusting ring (400); characterized in that, The cutting tool tip (100) extends to form a cutting tool shank (110) on the rear side of the thread cutting section. The cutting tool shank (200) has a movable tube (210) on the front side facing the cutting tool tip (100) along the central axis of the tool. The outer diameter of the cutting tool shank (110) is equal to the inner diameter of the movable tube (210), allowing the cutting tool shank (110) to be inserted into the movable tube (210) for back-and-forth sliding adjustment. The fixed sleeve (300) is fitted onto the movable tube. At one end of the opening of (210), the fixed sleeve (300) has a collar (310) at one end facing the tool holder (200), and a plurality of locking pieces (330) are formed circumferentially at the other end. A transition step (332) is formed on the inner sidewall of the middle section of the locking piece (330). During installation, the movable tube (210) extends into the fixed sleeve (300) from the collar (310) until its top end abuts against the transition step (332). A deformation groove (340) is provided between adjacent locking plates (330) in the fixed sleeve (300), and a fixing external thread (320) is provided between the locking plate (330) and the sleeve ring (310) on the outer side wall of the fixed sleeve (300); the adjusting ring (400) has a positioning ring (430) at one end facing the cutting tool head (100), and an adjusting internal thread (410) corresponding to the fixing external thread (320) is provided on the inner side wall of the other end. During installation, the adjusting ring (400) is first fitted onto the cutter head rod (110) via the positioning ring (430). After the cutter head rod (110) passes through the fixed sleeve (300) and the movable tube (210) from front to back and is connected, the adjusting ring (400) is rotated to make the adjusting internal thread (410) and the fixed external thread (320) cooperate with each other, thereby locking and fixing the relative length between the cutter head (100) and the cutter shank (200).

2. The retractable and adjustable CNC cutting tool according to claim 1, characterized in that, The tool holder (200) has a square tenon (220) at its tail end to facilitate tool mounting on a CNC lathe.

3. The retractable and adjustable CNC cutting tool according to claim 1, characterized in that, The deformation groove (340) has a buffer hole (341) at the end of the groove near the inner side.

4. The retractable and adjustable CNC cutting tool according to claim 1, characterized in that, The locking plate (330) of the fixed sleeve (300) has a gradually decreasing diameter tube diameter on the outer wall of the tail end, forming a pressure-bearing slope (331); the adjusting ring (400) has a compression slope (420) on the inner wall of the middle section, so that the inner diameter of the adjusting ring (400) gradually decreases from the adjusting internal thread (410) end to the positioning ring (430) end.

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