Cutting tool for small inner hole of difficult-to-machine part

Abstract

The utility model belongs to the technical field of metal cutting tools, and particularly relates to a cutting tool for small inner holes of parts difficult to machine, which comprises a fixed seat, a screw is fixed at the top end of the fixed seat, a rotating ring is in threaded connection with the surface of the screw, and four moving rods are arranged in a rotating groove formed in the bottom of the rotating ring. And the bottom ends of the moving rods penetrate through the fixed seat in a sliding manner, extend into the fixed seat and are fixedly provided with pressing blocks. By arranging the fixed seat, the screw rod, the rotating ring, the moving rod, the clamping blocks, the spring, the cutter body, the mounting head, the anti-loosening assembly and the pressing block, in the process of using the cutting tool for the small inner hole of the difficult-to-machine part, the pressing block and the clamping blocks are matched, the rotating ring is operated to rotate, and the four clamping blocks can be driven to be close to or away from each other at the same time; and after the clamping block moves, the cutter body placed in the fixing seat can be clamped, fixed or loosened, so that a worker does not need to screw a plurality of bolts, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal cutting tool technical field, concretely is a small hole cutting tool of difficult machining part. BACKGROUND

[0002] Cutting tool is the tool for cutting processing in mechanical manufacturing, most of the cutters are machine's, but also hand's, the material for manufacturing the cutter must have very high high temperature hardness and wear resistance, necessary bending strength, impact toughness and chemical inertia, good workability, and not easy to deform, high speed steel and hard alloy because of having very high bending strength and impact toughness, and good machinability, thereby often be used as the material for making cutting tool, for example, when the small hole of difficult machining and commonly used part is processed, small diameter boring cutter needs to be used, since the cutter head and shank of small diameter boring cutter are generally fixed through a plurality of bolts, in the process of replacing small diameter boring cutter, generally need to loosen the plurality of screws for fixing small diameter boring cutter first, can be extracted, and when fixed after replacement, it is also so, the installation process is cumbersome, and the replacement efficiency is low, therefore we put forward a small hole cutting tool of difficult machining part to solve the above problems. SUMMARY

[0003] (I) technical problem solved

[0004] In view of the defects of the prior art, the utility model provides a small hole cutting tool of difficult machining part, which solves the problems in the background art.

[0005] (II) technical scheme

[0006] The utility model discloses a small hole cutting tool of difficult machining part to solve the above problems.

[0007] A small hole cutting tool of difficult machining part, including the fixed seat, the top of fixed seat is fixed with screw rod, the surface screw thread connection of screw rod has the rotating ring, the rotating groove inside the bottom of rotating ring is provided with four mobile rods, the bottom of mobile rod all slidingly penetrates fixed seat and extends to its inside and is fixed with the pressure block, the inside of fixed seat is provided with four clamping blocks matched with pressure block, the clamping block is respectively pasted with corresponding pressure block, all be fixed on the clamping block spring, the other end of spring all is fixedly connected with the inner wall of fixed seat, the bottom of fixed seat is inserted with cutter body, the cutter body is fixed between four clamping blocks, the top of screw rod is fixed with mounting head, the mounting head is provided with the anti looseness subassembly for limiting rotating ring.

[0008] Further, the anti-loose assembly comprises an annular plate arranged above the rotating ring, four limiting rods are fixed to the bottom of the annular plate, four limiting grooves matched with the limiting rods are arranged on the top of the rotating ring, and the bottom ends of the limiting rods are slid through the mounting head and extend to the inside of the corresponding limiting grooves.

[0009] Further, four recesses are arranged on the top of the mounting head, and permanent magnets are fixed in the recesses.

[0010] Further, the surface of the fixing seat is fixed with an anti-skid sleeve made of rubber.

[0011] Further, four guide grooves matched with the clamping blocks are arranged on the inner wall of the bottom of the fixing seat, and the clamping blocks are slid in the corresponding guide grooves.

[0012] Further, the side wall of each of the four clamping blocks is fixed with an anti-skid convex strip which is tightly attached to the cutter body.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a small hole cutting tool for difficult machining parts, which has the following beneficial effects:

[0015] The utility model discloses a fixing seat, screw rod, rotating ring, moving rod, clamping block, spring, cutter body, mounting head, anti-loose assembly and pressing block are set up, and in the process of using this small hole cutting tool for difficult machining parts, the cooperation of pressing block and clamping block is utilized, and four clamping blocks are driven to approach or move away from each other by rotating the rotating ring, and the clamping blocks can be fixed or loosened after moving to clamp the cutter body placed in the fixing seat, so that the staff does not need to twist a plurality of bolts, and the operation is convenient, and when the rotating ring is rotated to fix the cutter body, the anti-loose assembly can further limit the rotating ring, and the loosening of the rotating ring is avoided. DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the whole structure sectional view of the utility model;

[0018] Figure 3 It is the rotating ring structure schematic view of the utility model;

[0019] Figure 4 It is the mounting head structure schematic view of the utility model.

[0020] In the figure: 1, fixed seat; 2, screw rod; 3, rotating ring; 4, moving rod; 5, clamping block; 6, spring; 7, cutter body; 8, mounting head; 9, anti-loosening assembly; 901, annular plate; 902, limiting rod; 903, limiting sink; 904, permanent magnet block; 10, anti-skid sleeve; 11, guide groove; 12, anti-skid convex strip; 13, pressing block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] EMBODIMENT

[0023] As Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the utility model discloses a kind of difficult-to-machine parts small hole cutting tools of embodiment of the utility model, including fixed seat 1, the surface of fixed seat 1 is fixed with anti-skid sleeve 10, anti-skid sleeve 10 is made of rubber, when staff takes fixed seat 1, the friction force of hand and its surface can be increased by the anti-skid sleeve 10 set, to play the effect of antiskid, the top of fixed seat 1 is fixed with screw rod 2, screw rod 2 is threadedly connected with rotating ring 3 on surface, rotating groove inside the bottom of rotating ring 3 is provided with four moving rods 4, the bottom of moving rod 4 is slidably penetrated fixed seat 1 and extends to its inside and is fixed with pressure block 13, four clamping blocks 5 matched with pressure block 13 are provided in fixed seat 1, one side wall of four clamping blocks 5 is fixed with anti-skid convex strip 12, anti-skid convex strip 12 is closely combined with tool body 7, the friction force of clamping block 5 and tool body 7 surface can be increased, so that tool body 7 will be more stable after being fixed in the inside of fixed seat 1, clamping block 5 is combined with corresponding pressure block 13 respectively, spring 6 is fixed on clamping block 5, the other end of spring 6 is fixedly connected with the inner wall of fixed seat 1, tool body 7 is inserted in the bottom of fixed seat 1, tool body 7 is fixedly positioned between four clamping blocks 5, the top of screw rod 2 is fixed with mounting head 8, mounting head 8 is provided with anti-loosening assembly 9 for limiting rotating ring 3, during use, when it is needed to take down this difficult-to-machine parts small hole cutting tool to replace, tool body 7 and fixed seat 1 can be taken down from equipment, then anti-loosening assembly 9 can be operated to release the limitation of rotating ring 3, then rotating ring 3 can be operated to rotate and move up using tool, rotating ring 3 moves up after rotating, and moving rod 4 is driven to move up, and pressure block 13 is driven to move up after moving rod 4, and the extrusion of clamping block 5 is released, at this time, clamping block 5 can be reset under the reset force of stretched spring 6, clamping block 5 resets to release the limitation of tool body 7, at this time, tool body 7 can be taken down from fixed seat 1, when installing, one end of tool body 7 can be inserted in the inside of fixed seat 1, then rotating ring 3 can be rotated and moved down, rotating ring 3 moves down through moving rod 4, and pressure block 13 can be driven to move down respectively, pressure block 13 moves down to extrude clamping block 5 and move to the center position at the same time, at this time, tool body 7 can be positioned and fixed.

[0024] As Figure 2 、 Figure 3 and Figure 4As shown in the drawings, in some embodiments, the anti-loosening assembly 9 comprises an annular plate 901 arranged above the rotating ring 3, the bottom of the annular plate 901 is fixed with four limiting rods 902, the top of the rotating ring 3 is provided with four limiting grooves 903 matched with the limiting rods 902, the bottom end of each limiting rod 902 is slidably penetrated through the mounting head 8 and extends below the mounting head 8 and is inserted into the corresponding limiting groove 903, four recesses are arranged on the top of the mounting head 8 and each is fixed with a permanent magnet block 904, the permanent magnet block 904 is attracted to the annular plate 901, when the rotating ring 3 is rotated and moved downward to the maximum distance, the limiting grooves 903 arranged on the rotating ring 3 are matched with the limiting rods 902, then the annular plate 901 can be driven to move downward, the annular plate 901 moves downward and drives the limiting rods 902 to be inserted into the limiting grooves 903, the rotating ring 3 is limited at this moment, so that the loosening of the rotating ring 3 is prevented, and the permanent magnet block 904 can limit the annular plate 901, so that the annular plate 901 is prevented from moving upward with the limiting rods 902 due to vibration.

[0025] As Figure 2 shown, in some embodiments, four guide grooves 11 matched with the clamping blocks 5 are arranged on the inner wall of the bottom of the fixing seat 1, the clamping blocks 5 are slidably arranged in the corresponding guide grooves 11, which can guide and support the clamping blocks 5, so that the clamping blocks 5 are more stable during sliding.

[0026] Finally, it should be noted that: the above only describes preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A small inner hole cutting tool for difficult-to-machine parts, comprising a fixed seat (1), characterized in that: The top of the fixed seat (1) is fixed with a screw rod (2), the surface of the screw rod (2) is threadedly connected with a rotating ring (3), and four moving rods (4) are arranged inside the rotating groove opened at the bottom of the rotating ring (3), and the bottom ends of the moving rods (4) slide through the fixed seat (1) and extend to the inside thereof and are fixed with a pressure block (13), and the inside of the fixed seat (1) is provided with four clamping blocks (5) adapted to the pressure blocks (13), and the clamping blocks (5) are respectively fitted with the corresponding pressure blocks (13), and the clamping blocks (5) are fixed with springs (6), and the other ends of the springs (6) are fixedly connected to the inner wall of the fixed seat (1), and the bottom of the fixed seat (1) is plugged with a tool body (7), and the tool body (7) is limited and fixed between the four clamping blocks (5), and the top of the screw rod (2) is fixed with a mounting head (8), and the mounting head (8) is provided with an anti-loosening component (9) for limiting the rotating ring (3).

2. A small inner hole cutting tool for difficult-to-machine parts according to claim 1, characterized in that: The anti-loosening assembly (9) includes an annular plate (901) arranged above the rotating ring (3), four limiting rods (902) are fixed to the bottom of the annular plate (901), and four limiting grooves (903) adapted to the limiting rods (902) are opened on the top of the rotating ring (3), and the bottom ends of the limiting rods (902) are slid through the mounting head (8) to extend below it and are inserted into the corresponding limiting grooves (903).

3. A small inner hole cutting tool for difficult-to-machine parts according to claim 2, characterized in that: Permanent magnet blocks (904) are fixed inside the four grooves opened on the top of the mounting head (8), and the permanent magnet blocks (904) are attracted to the annular plate (901).

4. The small inner hole cutting tool for difficult-to-machine parts according to claim 1, characterized in that: An anti-slip cover (10) is fixed on the surface of the fixing seat (1), and the anti-slip cover (10) is made of rubber.

5. The small inner hole cutting tool for difficult-to-machine parts according to claim 1, characterized in that: The bottom inner wall of the fixing seat (1) is provided with four guide grooves (11) adapted to the clamping blocks (5), and the clamping blocks (5) slide inside the corresponding guide grooves (11).

6. The small inner hole cutting tool for difficult-to-machine parts according to claim 1, characterized in that: One side wall of each of the four clamping blocks (5) is fixed with an anti-skid convex strip (12), and the anti-skid convex strip (12) is tightly fitted with the tool body (7).

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