Reverse milling cutter for machining elliptical hole

Abstract

The utility model discloses a reverse milling cutter for processing an elliptical hole, which comprises a reverse milling cutter body and a transmission shaft, the reverse milling cutter body is mounted on the outer side of the transmission shaft in a penetrating manner, the reverse milling cutter body adopts eight blades, and four blades are arranged on each of the upper side and the lower side of the reverse milling cutter body; wherein the eight blades are symmetrically arranged relative to the transverse center line of the milling cutter body. According to the reverse milling cutter for machining the oval hole, the limiting blocks are arranged, the upper end and the lower end of the interior of the transmission shaft are both provided with grooves in a penetrating and sliding mode, and then the outer sides of the two limiting blocks are both connected with limiting grooves in an attached mode; when the reverse milling cutter is mounted, the two limiting blocks are automatically ejected into the limiting grooves formed in the two ends of the interior of the reverse milling cutter body through the two extrusion springs, so that the mounted reverse milling cutter body can be automatically positioned and fixed, and the phenomenon that the reverse milling cutter body is loosened and falls off during use in the later period is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to technical fields, specifically is a kind of counter-milling cutter for oval hole processing. BACKGROUND

[0002] Counter-milling cutter for oval hole processing is a special tool in milling processing, by rotating cutting mode, counter-milling cutter can be along the predetermined oval path to workpiece cutting, to process the oval hole that meets the requirements, because it has the advantages such as high efficiency, high precision and extensive adaptability, therefore, it has wide application in mechanical processing field;

[0003] The existing counter-milling cutter is mostly positioned and installed by screw when cooperating with milling processing, but counter-milling cutter will appear loose phenomenon due to vibration after long time milling processing, it needs to be fastened regularly, which reduces the practicability of counter-milling cutter;

[0004] In order to overcome the above-mentioned defects, the prior art 1 (application number CN202323150504.5, application date

[0005] 2023-11-21 Chinese patent) a kind of quickly disassembled milling cutter, split tool head and shank are used, after shank is fixed on milling machine, tool head can be disassembled alone, it is convenient to maintain tool head, simple and convenient operation, it is beneficial to actual use;

[0006] Although the prior art can realize quick disassembly and replacement of counter-milling cutter, but when counter-milling cutter mills workpiece, high heat of milling will cause counter-milling cutter to shorten its service life due to high temperature, which reduces the practicability of counter-milling cutter;

[0007] Therefore, we propose counter-milling cutter for oval hole processing, which can solve the above problems. UTILITY MODEL CONTENT

[0008] The utility model aims at providing a kind of counter-milling cutter for oval hole processing to solve the problem that the existing counter-milling cutter in the market is mostly positioned and installed by screw when cooperating with milling processing, but counter-milling cutter will appear loose phenomenon due to vibration after long time milling processing, it needs to be fastened regularly, which reduces the practicability of counter-milling cutter.

[0009] To achieve the above object, the utility model provides the following technical scheme: a kind of counter-milling cutter for oval hole processing, including counter-milling cutter body and transmission shaft, wherein counter-milling cutter body is installed on the outside of transmission shaft;

[0010] Also include: the anti-milling cutter body is adopted eight piece cutter, and the cutter of anti-milling cutter body is set up and is four pieces in two sides, and eight cutter is about the transverse center line of anti-milling cutter body Symmetrical setting, the outer end of transmission shaft is installed with cooling spray pipe, and the both ends of cooling spray pipe are inclined shape, the inside of cooling spray pipe is provided with liquid storage groove, and cutting fluid is stored in liquid storage groove.

[0011] Preferably, the inside of the transmission shaft is slotted and the two ends are slidably installed with a limiting block, and the two limiting blocks are trapezoidal in shape, and the outer sides of the two limiting blocks are connected with a limiting groove, and the two limiting grooves are symmetrically provided on the inside of the anti-milling cutter body.

[0012] Preferably, the inside of the transmission shaft is slotted and provided with an extrusion spring on the two sides, and the two extrusion springs are the same in structure, and the outer ends of the two extrusion springs are connected with the limiting block.

[0013] Preferably, the outer side of the transmission shaft is slotted and slidably installed with a pull rod through a return spring, and the outer end of the pull rod is connected with a pull rope, and the outer end of the pull rope is connected with two limiting blocks through a guide wheel.

[0014] Preferably, the both sides of the cooling spray pipe are provided with spray holes, and the outer sides of the two spray holes correspond to the anti-milling cutter body.

[0015] Preferably, the both ends of the inside of the cooling spray pipe are slotted and slidably installed with a sealing block, and the two sealing blocks are the same in structure, and the outer sides of the two sealing blocks are sealingly connected with the spray holes.

[0016] Preferably, the both ends of the cooling spray pipe are installed with a second magnet through a screw, and the outer ends of the two second magnets correspond to a first magnet, and the two first magnets are installed on the outer sides of the two sealing blocks through a screw.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] Eight piece cutters are adopted, and four pieces are milled on the two sides, which can increase the effective milling width on the basis of reducing the processing length, and the cutter has higher cutting efficiency than the single-edge anti-milling cutter.

[0019] The limiting block is provided, the limiting block is slidably installed in the inside of the transmission shaft, the outer sides of the two limiting blocks are connected with the limiting groove, when the anti-milling cutter body needs to be quickly positioned and installed, the two limiting blocks are automatically popped out into the limiting groove provided in the both ends of the inside of the anti-milling cutter body through the two extrusion springs, so that the installed anti-milling cutter body can be automatically positioned and fixed, and the phenomenon of loosening and falling off of the anti-milling cutter body during use can be avoided.

[0020] Further, the pull rod is slidably installed through the groove on the outer side of the transmission shaft, then a pull rope is connected at the bottom of the pull rod, and the pull rope is connected with two limiting blocks through a guide wheel, when the counter-milling cutter body needs to be quickly disassembled and replaced, the pull rod is manually pulled to drive the pull rope to move through the guide wheel and pull the two limiting blocks to shrink, so that the counter-milling cutter body is separated from the transmission shaft, and then the counter-milling cutter body can be quickly disassembled and replaced, which is more time-saving and labor-saving.

[0021] A cooling nozzle is arranged, the cooling nozzle is slidably installed through the groove on the outer side of the transmission shaft, then a spray hole is formed at the upper and lower ends of the cooling nozzle, and a liquid storage groove is arranged in the cooling nozzle to store cutting fluid, when the transmission shaft drives the counter-milling cutter body to rotate and mill, the centrifugal force of rotation can spray the cutting fluid to the outer side of the counter-milling cutter body for cooling, so that the service life of the counter-milling cutter body is improved.

[0022] Further, the sealing blocks are slidably installed through the grooves at the upper and lower ends in the cooling nozzle, then the outer sides of the two sealing blocks are sealingly connected with the two spray holes, when the transmission shaft drives the counter-milling cutter body to mill, the centrifugal force of rotation can drive the sealing blocks to move, so that the two sealing blocks are separated from the two spray holes, then the cutting fluid stored in the cooling nozzle can be sprayed to the outer side of the counter-milling cutter body through the two spray holes for cooling, finally, the first magnet and the second magnet can automatically eject and reset the two sealing blocks through the principle that same magnetic poles repel each other, so that the two sealing blocks seal the two spray holes, which is more practical. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a rear view structure schematic diagram of the utility model;

[0024] Figure 2 It is a transmission shaft structure schematic diagram of the utility model counter-milling cutter body and transmission shaft side view;

[0025] Figure 3 It is a front view structure schematic diagram of the utility model counter-milling cutter body and transmission shaft;

[0026] Figure 4 It is a three-dimensional structure schematic diagram of the utility model counter-milling cutter body and transmission shaft;

[0027] Figure 5 It is a local side view structure schematic diagram of the utility model counter-milling cutter body and transmission shaft;

[0028] Figure 6 It is a cooling nozzle side view structure schematic diagram of the utility model;

[0029] Figure 7The utility model discloses Figure 6 The enlarged structure schematic diagram of middle A.

[0030] In the figure: 1, counter-milling cutter body; 2, transmission shaft; 3, cooling spray pipe; 4, limiting block; 5, limiting groove; 6, extrusion spring; 7, pull rope; 8, pull rod; 9, reset spring; 10, spray hole; 11, sealing block; 12, first magnet; 13, second magnet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range protected by the utility model.

[0032] The utility model provides the following technical scheme:

[0033] Embodiment one, to solve the problem that the existing counter-milling cutter will appear loose because of vibration after long time milling, reduce the use stability of counter-milling cutter body 1, disclose:

[0034] Counter-milling cutter body 1 with transmission shaft 2, wherein counter-milling cutter body 1 is installed on the outside of transmission shaft 2;

[0035] Still include: counter-milling cutter body 1 is to adopt eight sheet blades, and the blade of counter-milling cutter body 1 is that the upper and lower two sides are set up four pieces, wherein eight blades are about the horizontal center line of counter-milling cutter body 1 Symmetrical setting, the outer end of transmission shaft 2 is installed with cooling spray pipe 3, and the both ends of cooling spray pipe 3 are inclined shape, and the inside of cooling spray pipe 3 is provided with liquid storage groove, and the cutting fluid is stored in the liquid storage groove.

[0036] The inside upper and lower ends of transmission shaft 2 are all grooved and slidably installed with limiting block 4, and the two limiting blocks 4 are all trapezoidal shape, and the outside of the two limiting blocks 4 is all connected with limiting groove 5, the two limiting grooves 5 are symmetrically provided in the inside upper and lower sides of counter-milling cutter body 1, the inside upper and lower sides of transmission shaft 2 are all grooved and provided with extrusion spring 6, and the structure of the two extrusion springs 6 is same, and the outer end of the two extrusion springs 6 is all connected with limiting block 4.

[0037] The outside of transmission shaft 2 is grooved and slidably installed with pull rod 8 by reset spring 9, and the outer end of pull rod 8 is connected with pull rope 7, and the outer end of pull rope 7 is connected with two limiting blocks 4 by guide wheel.

[0038] As Figures 1-5As shown, when the reverse milling cutter body 1 needs to be quickly disassembled and replaced, only need to manually pull the pull rod 8 to drive the pull rope 7 to pass through the guide wheel and pull the two limit blocks 4 to move inwards, at this time the two limit blocks 4 can be separated from the two limit grooves 5, then the reverse milling cutter body 1 can be separated from the transmission shaft 2, at this time the reverse milling cutter body 1 can be quickly disassembled and replaced, and the operation is more time-saving and labor-saving;

[0039] Then the transmission shaft 2 extends through the inside of the reverse milling cutter body 1, at this time the two extrusion springs 6 can automatically pop out the two limit blocks 4 to the limit grooves 5 opened at both ends of the reverse milling cutter body 1 by their own elastic force, then the reverse milling cutter body 1 can be positioned and fixed after installation, avoiding the phenomenon of loosening and falling of the reverse milling cutter body 1 during long-time milling processing, and improving the use stability of the reverse milling cutter body 1.

[0040] Example two, different from example one, can spray cutting fluid to the reverse milling cutter body 1 during milling processing, so as to improve the cooling performance of the reverse milling cutter body 1, which is disclosed:

[0041] The upper and lower sides of the cooling nozzle 3 are provided with spray holes 10, and the outer sides of the two spray holes 10 correspond to the reverse milling cutter body 1. The inside of the cooling nozzle 3 is slidably provided with sealing blocks 11 at both ends, and the two sealing blocks 11 are the same in structure, and the outer sides of the two sealing blocks 11 are sealingly connected with the spray holes 10.

[0042] The upper and lower ends of the cooling nozzle 3 are provided with second magnets 13, and the outer ends of the two second magnets 13 correspond to the first magnets 12, wherein the two first magnets 12 are installed on the outer sides of the two sealing blocks 11 by screws.

[0043] As Figures 1-7 shown, when the driving mechanism drives the transmission shaft 2 to drive the reverse milling cutter body 1 to mill the workpiece, at this time the centrifugal force of the rotating transmission shaft 2 can drive the sealing blocks 11 arranged at the upper and lower ends of the cooling nozzle 3 to move in position at the upper and lower ends of the cooling nozzle 3, then the two sealing blocks 11 can be separated from the two spray holes 10, the cutting fluid stored in the inside of the cooling nozzle 3 can be sprayed to the outside of the reverse milling cutter body 1 through the two spray holes 10, the reverse milling cutter body 1 for milling processing can be cooled and cooled, the tool life and processing quality are improved;

[0044] After the milling processing is finished, the first magnet 12 and the second magnet 13 can repel the extruded sealing block 11 through the principle of magnetic field same sex, so as to elastically reset the sealing block 11 to seal the spray hole 10, avoid the phenomenon of cutting fluid leakage when not in use, improve the milling efficiency of the reverse milling cutter body 1, and the practicability is better.

[0045] The content not described in detail in the specification belongs to the prior art known to those skilled in the art, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, still can modify the technical scheme recorded in foregoing each embodiment, or equivalent replacement is carried out to part technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An oval hole processing with a reverse milling cutter, comprising a reverse milling cutter body (1) and a transmission shaft (2), wherein the reverse milling cutter body (1) is installed through the outside of the transmission shaft (2); characterized in that Further comprising: The reverse milling cutter body (1) is provided with eight blade pieces, and the blade pieces of the reverse milling cutter body (1) are provided with four pieces on the upper and lower sides, respectively, wherein the eight blade pieces are symmetrically arranged about the horizontal center line of the reverse milling cutter body (1); The outer end of the transmission shaft (2) is provided with a cooling nozzle (3) installed through, and the two ends of the cooling nozzle (3) are inclined, the inside of the cooling nozzle (3) is provided with a liquid storage groove, and the liquid storage groove stores cutting fluid.

2. The counter-milling tool for machining an elliptical hole according to claim 1, characterized in that: The inside of the transmission shaft (2) is provided with a limiting block (4) installed through the upper and lower slots, and the two limiting blocks (4) are trapezoidal, and the outer sides of the two limiting blocks (4) are connected with limiting grooves (5), and the two limiting grooves (5) are symmetrically provided in the inside of the reverse milling cutter body (1) on the upper and lower sides.

3. The counter-milling tool for machining an elliptical hole according to claim 2, characterized in that: The inside of the transmission shaft (2) is provided with an extrusion spring (6) on the upper and lower sides, and the two extrusion springs (6) are the same structure, and the outer ends of the two extrusion springs (6) are connected with the limiting block (4).

4. The counter-milling tool for machining an elliptical hole according to claim 3, characterized in that: The outer side of the transmission shaft (2) is provided with a pull rod (8) installed through the slot by a return spring (9), and the outer end of the pull rod (8) is connected with a pull rope (7), and the outer end of the pull rope (7) is connected with two limiting blocks (4) through a guide wheel.

5. The counter-milling tool for machining an elliptical hole according to claim 1, wherein: The upper and lower sides of the cooling nozzle (3) are provided with spray holes (10), and the outer sides of the two spray holes (10) correspond to the reverse milling cutter body (1).

6. The counter-milling tool for machining an elliptical hole according to claim 5, wherein: The inside of the cooling nozzle (3) is provided with a sealing block (11) installed through the two slots, and the two sealing blocks (11) are the same structure, and the outer sides of the two sealing blocks (11) are sealingly connected with the spray holes (10).

7. The counter-milling tool for machining an elliptical hole according to claim 6, characterized in that: The upper and lower ends of the cooling nozzle (3) are provided with second magnets (13) installed through screws, and the outer ends of the two second magnets (13) correspond to first magnets (12), wherein the two first magnets (12) are installed on the outer sides of the two sealing blocks (11) through screws.

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