Hollow type internal cooling thread milling cutter

Abstract

The utility model discloses a hollow formula inner cooling thread milling cutter, including cutter body, the cutter body one end is provided with the cutting part, and the cutting part has a plurality of cutting edges that are evenly distributed along the circumferential direction, the utility model has the beneficial effects that: under the pressure effect, the coolant passes through the coolant channel and enters the inner cooling hole, and is high -speed injection to the cutting area of cutting edge from the export of inner cooling hole, and the cutting process is cooled and lubricated, and the chip is washed away simultaneously, guarantee the smooth operation of processing, avoid cutting speed usually higher, and the cutting heat that tool bears is huge, and the thermal expansion deformation of tool material is caused to the precision of machining size is ensured, and the design of conical inner cooling hole enhances the injection pressure and the chip removal capacity of coolant, and the stability and efficiency of processing process are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a thread milling cutter, in particular to a hollow internal cooling thread milling cutter, belongs to milling cutter technical field. BACKGROUND

[0002] Milling cutter is a rotating cutter with one or more teeth for milling, each tooth cuts off the excess of the workpiece intermittently in turn, thread milling cutter is one of the common types, and the milling cutter is mainly used for processing plane, step, groove, shaped surface and cutting off workpiece on the milling machine;

[0003] In the prior art, such as the one disclosed in the utility model with the announcement number CN202223125831.0, the surface of the cutter tip main body is provided with three annular equidistantly arranged spiral cutting teeth, the outer surface of each cutting tooth is provided with a plurality of equidistantly arranged side thread edges, the tooth diameter of the cutting tooth gradually increases from the head of the cutter tip main body to the tail of the cutter tip main body, the spiral angle of the side thread edge is 15°, and the end face of the head of the cutter tip main body is a plane. The present device adopts full tooth thread design, can realize one-time cutting, and greatly improves the processing efficiency of the thread milling cutter. The prior art scheme has the following disadvantages: when milling threads, a large amount of cutting heat will be generated due to the cutting deformation of metal materials and the friction between the cutter and the workpiece. If the heat cannot be effectively dissipated in time, the temperature of the cutting edge of the cutter will rise sharply. On the one hand, the high temperature will accelerate the wear of the cutter material and reduce the service life of the cutter, and on the other hand, it will reduce the surface quality of the processed threads, such as increasing the surface roughness and reducing the thread size precision. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving at least one of the above technical problems and provides a hollow internal cooling thread milling cutter.

[0005] The utility model realizes the above-mentioned purpose through the following technical scheme: a cutter body is provided;

[0006] One end of the cutter body is provided with a cutting part, the cutting part has a plurality of cutting edges uniformly distributed in the circumferential direction, the cutting edges are spirally arranged around the end of the cutter body, a cooling liquid channel is arranged in the cutter body in the axial direction, a plurality of internal cooling holes are arranged in the surface of the cutting part in a ring shape, the outlets of the plurality of internal cooling holes are all directed to the cutting area of the cutting edge, and the diameter of the internal cooling hole gradually decreases to form a conical structure in the direction from the cutter body to the cutting edge.

[0007] As a further scheme of the utility model, a plurality of chip removal grooves are arranged on the cutting part at intervals, and the chip removal grooves are spirally arranged from the cutting edge to the one end of the cutter body.

[0008] As a further scheme of the utility model: the other end of the cutter body is provided with a handle, the handle and the cutter body adopt an integrated structure design, the surface of the handle is integrally formed with a clamping cone, the surface of the clamping cone is provided with a clamping groove, and the surface of the handle is provided with a positioning groove.

[0009] As a further scheme of the utility model: one end of the cooling liquid channel extends out of the handle and is provided, and a rotating joint is screw-connected in the inside of the end of the handle away from the cutter body.

[0010] As a further scheme of the utility model: the end of the handle away from the cutter body is provided with a sealing gasket, and the sealing gasket is embedded in the embedding groove provided at one end of the handle.

[0011] As a further scheme of the utility model: the cooling liquid channel provided in the inside of the cutter body is slidably connected with a piston, one side of the piston is fixedly provided with a fixed plate, the surface of the fixed plate is integrally formed with a rubber inserting rod, and one end of the rubber inserting rod is inserted into the internal cooling hole.

[0012] As a further scheme of the utility model: a telescopic rod is installed on one side of the piston, one end of the telescopic rod is installed in the inside of one end of the cutter body, and a spring is arranged around the surface of the telescopic rod.

[0013] The utility model has the advantages of:

[0014] The cooperation of the cooling liquid channel, the piston, the rubber inserting rod, the rotating joint, the embedding groove, the sealing gasket and the internal cooling hole can ensure the axial position stability of the milling cutter during the machining process, the accurately fixed handle can reduce unnecessary stress and vibration of the cutter during the machining process, the cutter can work in a good state, and the service life of the cutter is prolonged.

[0015] The cooling liquid enters the internal cooling hole through the cooling liquid channel under the action of pressure and is high-speed injected to the cutting area of the cutting edge from the outlet of the internal cooling hole, the cutting process is cooled and lubricated, the chips are washed away, the machining is ensured to be carried out smoothly, the cutting speed is usually high, the cutting heat borne by the cutter is huge, the thermal expansion deformation of the cutter material is avoided, and the machining size accuracy is ensured.

[0016] The design of the conical internal cooling hole enhances the injection pressure and the chip removal capacity of the cooling liquid, and further improves the stability and efficiency of the machining process.

[0017] When in use, the rubber inserting rod can be slid out of the inner cooling hole by a part, so that a gap is formed between the rubber inserting rod and the inner cooling hole, and then the cooling liquid can be smoothly discharged through the inner cooling hole to perform the cooling operation, after the machining is completed, the part of the rubber inserting rod slid out can be slid into the inner cooling hole to block the inner cooling hole, so that the dust and other impurities cannot enter the cooling liquid channel through the inner cooling hole to cause the blockage of the cooling liquid channel, thereby affecting the heat dissipation effect of the thread milling cutter. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a rotating joint, sealing gasket and card cone structure schematic view in the utility model;

[0020] Figure 3 It is a structure section view schematic view of the cutter body in the utility model;

[0021] Figure 4 It is a structure section view schematic view of the cutter body in the utility model;

[0022] Figure 5 It is a rubber inserting rod, piston and spring structure schematic view in the utility model;

[0023] In the drawing: 1, cutter body; 2, cutting part; 3, cutting edge; 4, chip removal groove; 5, cooling liquid channel; 6, telescopic rod; 7, spring; 8, piston; 9, fixed plate; 10, rubber inserting rod; 11, cutter handle; 12, card cone; 13, card slot; 14, positioning groove; 15, rotating joint; 16, embedded slot; 17, sealing gasket; 18, inner cooling hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly 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 those skilled in the art without creative labor fall within the protection scope of the utility model. Embodiment one

[0025] As shown in Figures 1 to 5 A hollow type inner cooling thread milling cutter, comprising a cutter body 1;

[0026] The cutter body 1 is provided with a cutting part 2 at one end, the cutting part 2 has a plurality of cutting edges 3 uniformly distributed in the circumferential direction, the cutting edges 3 are spirally arranged around the end of the cutter body 1, the inside of the cutter body 1 is provided with a cooling liquid channel 5 in the axial direction, the surface of the cutting part 2 is provided with a plurality of internal cooling holes 18 in a ring shape, the outlets of the plurality of internal cooling holes 18 are all directed to the cutting area of the cutting edges 3, and the internal cooling holes 18 gradually reduce in diameter to form a conical structure from the cutter body 1 to the cutting edges 3.

[0027] The external cooling liquid supply device is connected with the rotary joint 15 through a pipeline, and the rotary joint 15 is threadedly connected at one end of the tool shank 11, and when connected, the sealing gasket 17 in the embedded groove 16 at one end of the rotary joint 15 and the tool shank 11 is compressed to ensure the sealing effect of the connection part and prevent leakage of the cooling liquid. At the same time, the cooling liquid enters the internal cooling hole 18 through the cooling liquid channel 5 under the action of pressure and is sprayed at high speed from the outlet of the internal cooling hole 18 to the cutting area of the cutting edge 3, which cools and lubricates the cutting process, washes away the chips, ensures the smooth progress of the machining, avoids the high cutting speed and the huge cutting heat that the tool bears, causes the thermal expansion deformation of the tool material, and thus ensures the accuracy of the machining size, reduces the friction and wear between the tool and the workpiece, and further improves the machining quality and the durability of the tool.

[0028] The design of the conical internal cooling hole 18 enhances the spraying pressure and chip removal capacity of the cooling liquid, and further improves the stability and efficiency of the machining process.

[0029] A plurality of chip removal grooves 4 are arranged at intervals on the cutting part 2 and spirally extend from the cutting edge 3 to one end of the cutter body 1.

[0030] The chip removal process can be ensured to be smooth, and the chips removed by cutting can be smoothly discharged.

[0031] The other end of the cutter body 1 is provided with a tool shank 11, the tool shank 11 and the cutter body 1 adopt an integrated structure design, the surface of the tool shank 11 is integrally formed with a clamping cone 12, the surface of the clamping cone 12 is provided with a clamping groove 13, and the surface of the tool shank 11 is provided with a positioning groove 14.

[0032] First, the tool shank 11 is accurately connected and fixed with the machine tool spindle through the clamping groove 13 on the clamping cone 12 and the positioning groove 14 on the tool shank 11, the clamping groove 13 on the clamping cone 12 is matched with the corresponding key on the machine tool spindle, so that the milling cutter can always maintain a fixed angular position during rotation, which helps to improve the accuracy of the machining shape and reduce the shape error. Example two

[0033] In addition to including all the technical features in example one, the embodiment also includes:

[0034] One end of the cooling liquid channel 5 extends out of the tool holder 11, and a rotary joint 15 is threadedly connected to the inside of the end of the tool holder 11 away from the tool body 1.

[0035] The rotary joint 15 can be used to connect with an external cooling liquid supply pipeline.

[0036] A sealing gasket 17 is arranged at the end of the tool holder 11 away from the tool body 1, and the sealing gasket 17 is embedded in the embedding groove 16 arranged at the end of the tool holder 11.

[0037] When connected, the sealing gasket 17 embedded in the embedding groove 16 at the end of the tool holder 11 of the rotary joint 15 is compressed to ensure the sealing effect of the connection and prevent leakage of the cooling liquid. Example Three

[0038] In addition to including all the technical features in Example One, this example also includes:

[0039] A piston 8 is slidingly connected in the cooling liquid channel 5 arranged in the inside of the tool body 1, and a fixed plate 9 is fixed to one side of the piston 8. A rubber insertion rod 10 is integrally formed on the surface of the fixed plate 9, and one end of the rubber insertion rod 10 is inserted into an internal cooling hole 18.

[0040] A telescopic rod 6 is mounted on one side of the piston 8, one end of the telescopic rod 6 is mounted in the inside of one end of the tool body 1, and a spring 7 is arranged on the surface of the telescopic rod 6.

[0041] When used, as the cooling liquid enters, the cooling liquid can push the piston 8 to move to one side and compress the spring 7 on one side, and the rubber insertion rod 10 mounted on the surface of the fixed plate 9 can be slid out of the internal cooling hole 18, so that a gap is formed between the rubber insertion rod 10 and the internal cooling hole 18, and then the cooling liquid can be smoothly discharged through the internal cooling hole 18 for cooling operation.

[0042] Working principle: when used, first, the tool holder 11 is accurately connected and fixed with the machine tool spindle through the clamping groove 13 on the clamping cone 12 and the positioning groove 14 on the tool holder 11. The clamping groove 13 on the clamping cone 12 is matched with the corresponding key on the machine tool spindle, so that the milling cutter can always maintain a fixed angular position during rotation, which helps to improve the accuracy of the processed shape and reduce shape errors. In combination with the fastening of the positioning groove 14, the axial position of the milling cutter during processing can be stabilized, the accurately fixed tool holder 11 can reduce unnecessary stress and vibration of the tool during processing, the tool can work in good condition, and the service life of the tool is prolonged. The machine tool drives the milling cutter to rotate, and the cutting edge 3 contacts the workpiece for cutting processing.

[0043] Due to the spiral shape of the cutting edge 3, the cutting force can be evenly distributed, reducing the vibration and deformation of the tool, and the chip groove 4 can effectively divide the cutting chip into small pieces, making the cutting chip discharge more smoothly, avoiding the accumulation of cutting chip in the machining area affecting the machining precision and tool life;

[0044] At the same time, the external cooling liquid supply device is connected with the rotary joint 15 through the pipeline, and the rotary joint 15 is threadedly connected at one end of the tool shank 11. When connected, the sealing gasket 17 in the embedded groove 16 at one end of the rotary joint 15 and the tool shank 11 is compressed to ensure the sealing effect of the connection to prevent leakage of the cooling liquid. At the same time, the cooling liquid enters the inner cooling hole 18 through the cooling liquid channel 5 under the action of pressure and is sprayed at high speed from the outlet of the inner cooling hole 18 to the cutting area of the cutting edge 3, cooling and lubricating the cutting process, and washing away the cutting chip to ensure smooth machining, avoid the fact that the cutting speed is usually high and the cutting heat borne by the tool is huge, which leads to thermal expansion deformation of the tool material, thereby ensuring the accuracy of the machining size, reducing the friction and wear between the tool and the workpiece, and further improving the machining quality and the durability of the tool;

[0045] The design of the conical inner cooling hole 18 enhances the spraying pressure and chip removal capacity of the cooling liquid, further improving the stability and efficiency of the machining process;

[0046] When in use, the cooling liquid can push the piston 8 to move to one side and compress the spring 7 on one side, and the rubber insertion rod 10 installed on the surface of the fixed plate 9 can slide out part of the inner cooling hole 18, so that a gap is formed between the rubber insertion rod 10 and the inner cooling hole 18, thereby ensuring that the cooling liquid can be smoothly discharged through the inner cooling hole 18 for cooling operation;

[0047] After the machining is completed, the pipeline for supplying the cooling liquid is disconnected, the pressure of the cooling liquid in the cooling liquid channel 5 is reduced, and the spring 7 in the compressed state can push the piston 8 to slide to one side in the reverse direction. The partially slid-out rubber insertion rod 10 can slide back into the inner cooling hole 18 to block the inner cooling hole 18, preventing dust and other impurities from entering the cooling liquid channel 5 through the inner cooling hole 18 when not in use, thereby affecting the heat dissipation effect of the thread milling cutter.

[0048] It should be noted that the telescopic rod 6 is composed of two square rod pieces with different diameters, and the smaller diameter rod piece is slidingly connected inside the larger diameter rod piece. In this technology, it is only used for guiding and supporting.

[0049] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0050] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all of a list of features. It is further understood that the specification is to be considered as a whole and not with reference to a single feature or design element alone.

Claims

1. A hollow internal cooling thread milling cutter, comprising a cutter body (1); characterized in that One end of the cutter body (1) is provided with a cutting part (2), the cutting part (2) has a plurality of cutting edges (3) uniformly distributed in the circumferential direction, the cutting edges (3) are spirally wrapped around the end of the cutter body (1), the inside of the cutter body (1) is provided with a cooling liquid channel (5) in the axial direction, the surface of the cutting part (2) is provided with a plurality of internal cooling holes (18) in a ring shape, the outlets of the plurality of internal cooling holes (18) are all directed to the cutting area of the cutting edge (3), and the diameter of the internal cooling hole (18) gradually decreases to form a conical structure from the cutter body (1) to the cutting edge (3).

2. The hollow internal-cooled thread milling cutter according to claim 1, characterized in that: A plurality of chip flutes (4) are arranged at intervals on the cutting part (2), and the chip flutes (4) are spirally arranged from the cutting edge (3) to the end of the cutter body (1).

3. The hollow internal-cooled thread milling cutter according to claim 1, characterized in that: The other end of the cutter body (1) is provided with a shank (11), the shank (11) and the cutter body (1) are designed in an integrated structure, the surface of the shank (11) is integrally formed with a clamping cone (12), the surface of the clamping cone (12) is provided with a clamping groove (13), and the surface of the shank (11) is provided with a positioning groove (14).

4. The hollow internal-cooled thread milling cutter according to claim 3, characterized in that: One end of the cooling liquid channel (5) extends out of the shank (11) and is provided, and the end of the shank (11) away from the cutter body (1) is internally threadedly connected with a rotary joint (15).

5. The hollow internal-cooled thread milling cutter according to claim 4, characterized in that: The end of the shank (11) away from the cutter body (1) is provided with a sealing gasket (17), and the sealing gasket (17) is embedded in the embedding groove (16) formed in one end of the shank (11).

6. The hollow internal-cooled thread-milling cutter according to claim 1, characterized in that: The cooling liquid channel (5) formed in the inside of the cutter body (1) is slidably connected with a piston (8), one side of the piston (8) is fixedly provided with a fixed plate (9), the surface of the fixed plate (9) is integrally formed with a rubber insertion rod (10), and one end of the rubber insertion rod (10) is inserted into the internal cooling hole (18).

7. The hollow internal-cooled thread milling cutter according to claim 6, characterized in that: One side of the piston (8) is provided with a telescopic rod (6), one end of the telescopic rod (6) is mounted in the inside of one end of the cutter body (1), and the surface of the telescopic rod (6) is provided with a spring (7).

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