Inner hole turning blade with high cutting precision

Abstract

The utility model discloses an inner hole turning blade with high cutting precision, which relates to the technical field of machining, aims to effectively improve blade displacement caused by cutting pressure, guarantee cutting precision and improve cutting efficiency, and adopts the technical scheme that the inner hole turning blade with high cutting precision comprises a cutter bar, a cutter holder and a blade, the cutter holder comprises a holder body, a mounting groove and a clamping rod, the holder body comprises a top inclined surface, a guide inclined surface, a front inclined surface, a rear inclined surface and a side inclined surface, the clamping rod comprises a rod head, a screw, a rod body, a fixed seat, a spring and a clamping block, a tool withdrawal groove is formed in the bottom end of the mounting groove, and the blade comprises a tool pattern, a mounting hole and a fastening bolt. According to the inner hole turning blade with the high cutting precision, the chip removal face is added to increase the chip removal rate so as to improve the cutting efficiency, the blade body is further fixed in the mounting groove, the blade body is prevented from moving outwards due to too large cutting pressure, and the cutting precision is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a high-precision internal turning insert. Background Technology

[0002] Cutting tools are indispensable in machining. Whether it's a conventional machine tool, an advanced CNC machine tool, machining center (MC), or flexible manufacturing system (FMC), all rely on cutting tools to complete machining operations. The development of cutting tools has a significant impact on improving productivity and machining quality. Tool material, tool structure, and geometry are the three key factors determining a cutting tool's cutting performance, with the performance of the tool material playing a crucial role. Cutting tools are tools used for machining in mechanical manufacturing, also known as cutting tools. High-precision internal turning inserts are cutting tools used for turning internal holes, commonly used in machine tool manufacturing, aerospace, and automotive manufacturing. Due to their elongated shape, they are mainly used for machining deep holes, meeting the requirements of high precision and high efficiency. The key technologies for hole machining are solving the problems of rigidity and chip removal in internal turning tools.

[0003] Because existing high-precision internal turning inserts are too long and narrow, they are easily affected by cutting pressure, which can cause the inserts to be pried and affect cutting accuracy. The existing high-precision internal turning inserts have a large discharge resistance on the rear side, and chip removal is usually done through the front side or top surface. The chip removal rate is low, which affects cutting efficiency and is time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of this invention is to provide a high-precision internal turning insert that effectively improves the insert displacement caused by cutting pressure, ensures cutting accuracy, and adds a chip removal surface to increase the chip removal rate, thereby improving cutting efficiency.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A high-precision internal turning insert includes a tool shank, a tool holder, and an insert. The tool holder is welded to the top of the tool shank, and the insert is embedded inside the tool holder. The tool holder includes a body, a mounting groove, and a retaining rod. The bottom of the body is a "cylinder" with a cut-off top. The top of the body has multiple bevels. The bottom of the body is welded to the top of the tool shank. The mounting groove is located at the right end of the top of the body. The insert is embedded in the mounting groove and locked in place within the mounting groove. The retaining rod is located in front of the mounting groove and locked in place on the front of the body. The insert is fixed in place within the mounting groove by the retaining rod.

[0007] Furthermore, the base includes a top inclined surface, a guide inclined surface, a front inclined surface, a rear inclined surface, and a side inclined surface. The top inclined surface is located at the top of the base, and a guide inclined surface is located at the left end of the top inclined surface. The front inclined surface is located on the front of the base, and the mounting groove is located on the front inclined surface. The rear inclined surface is located on the back of the base, and the side inclined surface is located at the top of the base, near the end of the mounting groove.

[0008] Furthermore, the lever includes a lever head, a screw, a lever body, a fixing seat, a spring, and a locking block. The lever head is circular, and the screw passes through the lever head and is threaded onto the front of the seat body. The lever head is fixed to the seat body by the screw, and the lever head is located at the fixed end of the lever body. The lever body moves in front of the mounting groove with the lever head as the center. A fixing seat is provided below the mounting groove, and the fixing seat is welded to the seat body. A spring is provided inside the fixing seat, and a locking block is provided at the top of the spring. The distal end of the lever body is fixed to the inside of the fixing seat by the locking block.

[0009] Furthermore, a tool relief groove is provided at the bottom of the mounting groove, and the tool relief groove is circular.

[0010] Furthermore, the blade includes cutting patterns, mounting holes, and fastening bolts. The cutting patterns are provided on the front and back of the blade surface. The mounting hole is provided in the center of the blade. The fastening bolt passes through the mounting hole and is threaded into the inside of the base. The blade is fixed in the mounting groove by the fastening bolt.

[0011] In summary, the beneficial technical effects of this utility model are as follows:

[0012] 1. A retaining rod is used to further fix the blade in the mounting groove, preventing excessive cutting pressure from causing the blade to shift outward and ensuring cutting accuracy;

[0013] 2. An edge bevel has been added. This bevel facilitates the guidance of cutting chips from the cutting tool to the rear bevel, effectively reducing discharge resistance and improving cutting efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the base structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the clamping rod structure of this utility model.

[0017] 1. Tool holder; 2. Tool holder; 3. Tool blade; 21. Base; 22. Mounting slot; 23. Locking rod; 31. Tool groove; 32. Mounting hole; 33. Fastening bolt; 211. Top bevel; 212. Guide bevel; 213. Front bevel; 214. Back bevel; 215. Side bevel; 221. Tool relief groove; 231. Rod head; 232. Screw; 233. Rod body; 234. Fixing base; 235. Spring; 236. Locking block. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model discloses a high-precision internal turning insert 3, comprising a tool holder 1, a tool holder 2, and an insert 3. The tool holder 1 is connected to a lathe, and the tool holder 2 is welded to the top of the tool holder 1. The insert 3 is embedded inside the tool holder 2, which is used to fix the insert 3 and ensure the accuracy and stability during internal turning. The tool holder 2 includes a base 21, a mounting groove 22, and a retaining rod 23. The bottom end of the base 21 is a "cylinder" with a cut-off top. The top of the base 21 is provided with multiple inclined surfaces for chip removal. The bottom end of the base 21 is welded... At the top of the tool holder 1, a mounting groove 22 is provided on the right side of the top of the base 21. The inner shape of the mounting groove 22 matches the shape of the blade 3. The blade 3 is embedded in the mounting groove 22 and locked in place. A retaining rod 23 is located in front of the mounting groove 22 and locked in place on the front of the base 21. The blade 3 is fixed in the mounting groove 22 by the retaining rod 23. The retaining rod 23 further protects the blade 3 in the mounting groove 22, preventing excessive pressure during cutting from causing the blade 3 to shift outward and ensuring cutting accuracy. The blade 3 includes cutting grooves 31, mounting holes 32, and fastening bolts 33. The cutting grooves 31 are located on the front and back of the blade face. The cutting grooves 31 help control the formation and discharge of chips, reduce vibration and heat accumulation during cutting, thereby improving machining quality and extending tool life. A mounting hole 32 is provided in the center of the blade 3. The fastening bolt 33 passes through the mounting hole 32 and is threaded into the base 21. The blade 3 is fixed in the mounting groove 22 by the fastening bolt 33. See details. Figure 1 .

[0020] The base body 21 includes a top inclined surface 211, a guide inclined surface 212, a front inclined surface 213, a rear inclined surface 214, and a side inclined surface 215. The top inclined surface 211 is located at the top of the base body 21. The top inclined surface 211 slopes downward from the cutting tip and inward, forming a space between the working surface and the cutting tip, so that the cutting action is concentrated at the cutting tip. The guide inclined surface 212 is provided at the left end of the top inclined surface 211 to guide chip removal and reduce chip removal resistance. The front inclined surface 213 is located on the front of the base body 21, and the mounting groove 22 is provided on the front inclined surface 213. The rear inclined surface 214 is provided on the back of the base body 21. The front inclined surface 213 and the rear inclined surface 214 are angles at which the chips are separated from the workpiece, making chip removal easier and achieving effective turning. The side inclined surface 215 is located at the top of the base body 21. An inclined surface is added at the end of the rear inclined surface 214 near the cutting tool 3 to facilitate guiding the cutting chips from the cutting tool 3 to the rear inclined surface 214, effectively reducing the removal resistance and improving the cutting efficiency. The lever 23 includes a lever head 231, a screw 232, a lever body 233, a fixing seat 234, a spring 235, and a locking block 236. The lever head 231 is circular. The screw 232 passes through the lever head 231 and is threaded onto the front of the seat body 21. The lever head 231 is fixed to the seat body 21 by the screw 232. The lever head 231 is located at the fixed end of the lever body 233. The lever body 233 moves in front of the mounting groove 22 with the lever head 231 as the center. The distal end of the lever body 233 makes a circular motion with the lever head 231 as the center. The fixing seat 234 is provided below the mounting groove 22. The fixing seat 234 is welded to the seat body 21. The spring 235 is provided inside the fixing seat 234. The locking block 236 is provided at the top of the spring 235. The distal end of the lever body 233 is fixed to the inside of the fixing seat 234 by the locking block 236. The bottom of the mounting slot 22 is provided with a tool retraction groove 221. The tool retraction groove 221 is circular to facilitate the removal of the blade 3. See details. Figure 2 , Figure 3 .

[0021] Example

[0022] Operating procedures

[0023] 1. Press the latch 236, turn the rod 233 back clockwise, then place the blade 3 in the mounting slot 22 and fix the blade 3 in the mounting slot 22 with the fastening bolt 33;

[0024] 2. Move the rod 233 clockwise to press down the locking block 236, which then presses against the inner wall of the fixing seat 234. The locking block 236 springs back, fixing the rod 233 inside the fixing seat 234.

[0025] 3. The blade 3 is further fixed in the mounting slot 22 by the clamp 23, and then the cutting operation begins.

[0026] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-precision boring insert (3) comprising a tool shank (1), a tool holder (2) and an insert (3), the tool holder (2) being welded to the top end of the tool shank (1), the insert (3) being embedded in the tool holder (2), characterized in that: The knife seat (2) comprises a seat body (21), a mounting groove (22) and a clamping rod (23), the bottom end of the seat body (21) is a "cylinder" with a cut top, the top of the seat body (21) is provided with a plurality of inclined surfaces, the bottom end of the seat body (21) is welded to the top end of the knife rod (1), the top of the seat body (21) is provided with the mounting groove (22) at the right end, the mounting groove (22) is embedded with the blade (3), the blade (3) is locked and connected in the mounting groove (22), the clamping rod (23) is arranged in front of the mounting groove (22), the clamping rod (23) is locked and connected to the front surface of the seat body (21), and the blade (3) is fixed in the mounting groove (22) through the clamping rod (23).

2. A high-accuracy internal turning insert (3) according to claim 1, characterized in that: The seat body (21) comprises a top inclined surface (211), a guide inclined surface (212), a front inclined surface (213), a rear inclined surface (214) and a side inclined surface (215), the top inclined surface (211) is arranged at the top end of the seat body (21), the left end of the top inclined surface (211) is provided with the guide inclined surface (212), the front inclined surface (213) is arranged on the front surface of the seat body (21), the mounting groove (22) is arranged on the front inclined surface (213), the rear surface of the seat body (21) is provided with the rear inclined surface (214), the side inclined surface (215) is arranged at the top end of the seat body (21), and the side inclined surface (215) is arranged at one end close to the mounting groove (22).

3. A high-accuracy internal turning insert (3) according to claim 1, characterized in that: The clamping rod (23) comprises a rod head (231), a screw (232), a rod body (233), a fixing seat (234), a spring (235) and a clamping block (236), the rod head (231) is a "circle", the screw (232) is threadedly connected to the front surface of the seat body (21) through the rod head (231), the rod head (231) is fixed to the seat body (21) through the screw (232), the rod head (231) is arranged at the fixed end of the rod body (233), the rod body (233) moves in front of the mounting groove (22) with the rod head (231) as the center, the fixing seat (234) is arranged below the mounting groove (22), the fixing seat (234) is welded to the seat body (21), the spring (235) is arranged in the fixing seat (234), the top end of the spring (235) is provided with the clamping block (236), and the far end of the rod body (233) is fixed to the inner side of the fixing seat (234) through the clamping block (236).

4. A high-accuracy internal turning insert (3) according to claim 1, characterized in that: The bottom end of the mounting groove (22) is provided with a tool withdrawal groove (221), and the tool withdrawal groove (221) is "circular".

5. A high-accuracy internal turning insert (3) according to claim 1, characterized in that: The blade (3) comprises a blade mark (31), a mounting hole (32) and a fastening bolt (33), the blade mark (31) is arranged on the front surface and the back surface of the blade face, the mounting hole (32) is arranged at the center of the blade (3), and the fastening bolt (33) is threadedly connected to the inside of the seat body (21) through the mounting hole (32). The blade (3) is fixed in the mounting groove (22) through the fastening bolt (33).

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