Cutter chuck of milling machine

Abstract

The utility model provides a cutter chuck of a milling machine, which comprises a conical interface, one end of the conical interface is connected with a chuck sleeve, the chuck sleeve is divided into a lower external thread section and an upper external thread section, the lower external thread section is in threaded connection with a lower thread clamping sleeve, the upper external thread section is in threaded connection with an upper thread clamping sleeve, and a spring clamping sleeve is movably arranged in the chuck sleeve; an outer bevel edge ring inclining outwards from bottom to top is arranged on the lower edge of the spring clamping sleeve, an inner bevel edge ring is inwards arranged at the lower end of the lower threaded clamping sleeve, a plurality of lower gap grooves penetrating through the outer bevel edge ring are formed in the spring clamping sleeve from bottom to top, and a plurality of upper gap grooves are formed in the portion, between every two lower gap grooves, of the spring clamping sleeve from top to bottom. A bevel edge protrusion extending out of the chuck sleeve and inclining outwards from top to bottom is arranged on the upper edge of the spring clamping sleeve outwards, and an inner beveling ring is arranged at the lower end of the upper thread clamping sleeve. The upper end and the lower end of the cutter can be clamped, the clamping reliability of the cutter is improved, the anti-vibration performance is enhanced, and high-precision rotation of the main shaft is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lathe processing technical field relates to a cutter chuck of milling machine. BACKGROUND

[0002] In the field of modern mechanical processing, as a widely used machine tool equipment, the milling machine plays a crucial role in metal cutting, mold manufacturing and other precision part processing. As a key component connecting the milling cutter and the main shaft of the milling machine, the performance of the milling cutter clamp directly affects the machining accuracy, efficiency and safety.

[0003] The traditional milling cutter clamp usually adopts the combination of locking nuts and spring collets for fixation. Specifically, the inner inclined surface of the locking nut and the outer inclined surface of the spring collet are mutually fitted, and the clamping of the cutter is realized by the tightening action of the locking nut. This design relies on the pressure exerted by the locking nut to deform the spring collet, so that the lower end of the spring collet gradually shrinks to clamp the cutter.

[0004] However, the above-mentioned traditional structure has obvious limitations. Since the force is mainly exerted by the lower end of the spring collet, the upper part of the cutter lacks sufficient clamping force, resulting in uneven stress on the upper and lower ends of the cutter inside the chuck. This not only affects the installation stability of the cutter, but also in the actual cutting process, when encountering machine tool vibration caused by external factors, insufficient rotation accuracy of the main shaft resulting in runout, and local hardness changes of the workpiece material, etc., the cutter is prone to instability, and the risk of breaking is significantly increased. SUMMARY

[0005] The utility model aims at providing a cutter chuck of milling machine, which can clamp the upper and lower ends of the cutter inside the chuck, improve the clamping reliability of the cutter, enhance the anti-vibration performance, and ensure the high-precision rotation of the main shaft.

[0006] To solve the above technical problems, the utility model provides a cutter chuck of milling machine, which comprises a tapered interface, one end of the tapered interface is connected with a chuck sleeve, the end of the chuck sleeve away from the tapered interface is open, the chuck sleeve is divided into a lower external thread segment away from the tapered interface and an upper external thread segment close to the tapered interface, the lower external thread segment is threadedly connected with a lower thread clamping sleeve, the upper external thread segment is threadedly connected with an upper thread clamping sleeve, a spring collet capable of being taken out from the opening of the chuck sleeve is movably arranged in the chuck sleeve;

[0007] The lower edge of the spring collet is provided with an outwardly protruding outer bevel ring that is inclined outwardly from bottom to top, and the outer diameter of the outer bevel ring is such that it cannot enter the chuck collet, the inner circle of the lower end of the lower threaded chucking sleeve is provided with an inner bevel ring that can extrude the outer bevel ring upwardly, and the spring collet is provided with a plurality of lower gap slots that penetrate the outer bevel ring from bottom to top, each of the lower gap slots does not penetrate the spring collet upwardly, and the spring collet is provided with a plurality of upper gap slots between each two lower gap slots, each of the upper gap slots does not penetrate the spring collet downwardly.

[0008] The upper edge of the spring collet is provided with a bevel protrusion outwardly above each lower gap slot, each bevel protrusion is inclined outwardly from top to bottom, the inner circle of the lower end of the upper threaded chucking sleeve is provided with an inner bevel ring that can extrude the bevel protrusion, and the upper outer threaded section is provided with a plurality of limit sliding grooves that are in one-to-one sliding connection with the bevel protrusions.

[0009] By adopting the above technical scheme, when the tool needs to be clamped, the tool is inserted into the spring collet, the lower threaded chucking sleeve is first screwed upwardly, the inner bevel ring extrudes the outer bevel ring upwardly and inwardly, the lower end of the spring collet is inwardly contracted to clamp the lower end of the tool, then the upper threaded chucking sleeve is screwed downwardly, the inner bevel ring of the upper threaded chucking sleeve extrudes the bevel protrusion downwardly and inwardly, the upper end of the spring collet is inwardly contracted to clamp the upper end of the tool, the upper and lower ends of the tool can be stably clamped, the clamping reliability of the tool is improved, and the anti-vibration performance is enhanced.

[0010] The utility model further provides that the inner side of the upper and lower ends of the spring collet is provided with an inner clamping ring, each lower gap slot penetrates the lower inner clamping ring, and each upper gap slot penetrates the upper inner clamping ring.

[0011] The utility model further provides that each limit sliding groove penetrates the lower outer threaded section downwardly.

[0012] The utility model further provides that the outer periphery of the lower threaded chucking sleeve is provided with a plurality of circumferentially distributed first clamping grooves along the length direction.

[0013] The utility model further provides that the outer periphery of the upper threaded chucking sleeve is provided with a plurality of circumferentially distributed second clamping grooves along the length direction.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model re-designs the structure of the spring collet, and through the cooperation of the upper and lower threaded chucking sleeves during use, the upper and lower ends of the spring collet are inwardly clamped to the tool, the upper and lower ends of the tool are uniformly stressed, the tool is less likely to jump due to external factors, the clamping reliability of the tool is improved, the anti-vibration performance is enhanced, and the high-precision rotation of the main shaft is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the cone interface and the chuck sleeve;

[0016] Figure 2 is the exploded view for showing the connection of the utility model;

[0017] Figure 3 is the overall structure schematic diagram of the cone interface and the chuck sleeve;

[0018] Figure 4 is the overall structure schematic diagram of the spring sleeve;

[0019] Figure 5 is the overall structure schematic diagram of the lower threaded clamping sleeve;

[0020] Figure 6 is the overall structure schematic diagram of the upper threaded clamping sleeve.

[0021] Wherein, 1, the cone interface; 2, chuck sleeve; 3, lower outer thread section; 4, upper outer thread section; 5, lower threaded clamping sleeve; 6, first clamping groove; 7, upper threaded clamping sleeve; 8, second clamping groove; 9, spring sleeve; 10, inner clamping ring; 11, outer bevel ring; 12, inner bevel ring; 13, lower gap groove; 14, upper gap groove; 15, bevel protrusion; 16, inner chamfer ring; 17, limit sliding groove. DETAILED DESCRIPTION

[0022] The cutter chuck of the milling machine is further described in detail below in combination with the drawings and specific embodiments. The advantages and features of the utility model will be more apparent according to the following description. It should be noted that the drawings are all in a very simplified form and all use non-precise proportions, only for the purpose of facilitating and clearly assisting the description of the embodiments of the utility model. The same or similar reference signs in the drawings represent the same or similar parts.

[0023] Embodiment, refer to Figures 1-6 A cutter chuck of a milling machine, comprising a cone interface 1, one end of the cone interface 1 is connected with a chuck sleeve 2, the opening of the chuck sleeve 2 is away from one end of the cone interface 1, the chuck sleeve 2 is divided into a lower outer thread section 3 away from the cone interface 1 and an upper outer thread section 4 close to the cone interface 1, the lower outer thread section 3 is threadedly connected with a lower threaded clamping sleeve 5, a plurality of first clamping grooves 6 distributed in a circle are formed along the length direction of the outer periphery of the lower threaded clamping sleeve 5, the upper outer thread section 4 is threadedly connected with an upper threaded clamping sleeve 7, a plurality of second clamping grooves 8 distributed in a circle are formed along the length direction of the outer periphery of the upper threaded clamping sleeve 7, the design of the first clamping grooves 6 and the second clamping grooves 8 facilitates the rotation of the threaded clamping sleeve with a tool, a spring sleeve 9 capable of being taken out from the opening of the chuck sleeve 2 is movably arranged in the chuck sleeve 2.

[0024] The inner side of the upper and lower ends of the spring collet 9 is provided with an inner clamping ring 10. According to different tool outer diameters, the thickness of the inner clamping ring 10 is designed to adapt to different tools. The lower edge of the spring collet 9 is provided with an outwardly protruding outer bevel ring 11. The outer bevel ring 11 is inclined outwardly from bottom to top. The outer diameter of the outer bevel ring 11 is such that it cannot enter the chuck collet 2. The inner circle of the lower end of the lower threaded clamping sleeve 5 is provided with an inner bevel ring 12 which can extrude the outer bevel ring 11 upwardly. By extruding the outer bevel ring 11 through the inner bevel ring 12, the lower end of the spring collet 9 can be driven to shrink inwardly to clamp the tool. The spring collet 9 is provided with six lower gap slots 13 which penetrate the outer bevel ring 11 and the lower inner clamping ring 10 from bottom to top. Each lower gap slot 13 does not penetrate the spring collet 9 upwardly. The spring collet 9 is provided with six upper gap slots 14 which penetrate the upper inner clamping ring 10 from top to bottom between every two lower gap slots 13. Each upper gap slot 14 does not penetrate the spring collet 9 downwardly. Through the design of the lower gap slots 13 and the upper gap slots 14, the spring collet 9 forms a serpentine spring structure, and the two ends have the ability to shrink inwardly.

[0025] The upper edge of the spring collet 9 is provided with a bevel protrusion 15 outwardly above each lower gap slot 13. Each bevel protrusion 15 is inclined outwardly from top to bottom. The inner circle of the lower end of the upper threaded clamping sleeve 7 is provided with an inner bevel ring 16 which can extrude the bevel protrusion 15. By extruding the bevel protrusion 15 through the inner bevel ring 16, the upper end of the spring collet 9 can be driven to shrink inwardly to clamp the tool. The upper outer threaded section 4 is provided with six limit sliding grooves 17 which correspond to the bevel protrusions 15 one by one and are connected in sliding mode along the length direction of the upper outer threaded section 4, so that the bevel protrusions 15 can extend out. Each limit sliding groove 17 penetrates the lower outer threaded section 3 downwardly, facilitating the replacement of the spring collet 9.

[0026] Working principle: when the tool needs to be clamped, the matched spring collet 9 is selected and inserted into the chuck collet 2, and the tool is inserted into the spring collet 9. First, the lower threaded clamping sleeve 5 is tightened upwardly, the outer bevel ring 11 is extruded upwardly and inwardly by the inner bevel ring 12, the lower end of the spring collet 9 is shrunk inwardly to clamp the lower end of the tool, then the upper threaded clamping sleeve 7 is tightened downwardly, the inner bevel ring 16 of the upper threaded clamping sleeve 7 extrudes the bevel protrusion 15 downwardly and inwardly, the upper end of the spring collet 9 is shrunk inwardly to clamp the upper end of the tool, so that the upper and lower ends of the tool can be clamped stably, the clamping reliability of the tool is improved, and the anti-vibration performance is enhanced.

[0027] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0028] The above description is only the description of the preferred embodiment of the utility model, and does not limit the utility model in any way, and any change and modification of the utility model made by the ordinary skilled in the art according to the above disclosure are within the protection scope of the claims.

Claims

1. A tool holder of a milling machine, comprising a taper interface (1), a holder sleeve (2) being connected to one end of the taper interface (1), and the holder sleeve (2) being open at an end away from the taper interface (1), characterized in that, The chuck sleeve (2) is divided into a lower external thread section (3) away from the taper interface (1) and an upper external thread section (4) close to the taper interface (1), the lower external thread section (3) is threadedly connected with a lower threaded chuck sleeve (5), the upper external thread section (4) is threadedly connected with an upper threaded chuck sleeve (7), and the chuck sleeve (2) movably has a spring chuck sleeve (9) capable of being taken out from an opening thereof; An outer bevel ring (11) is outwardly protruded on the lower edge of the spring chuck sleeve (9), the outer bevel ring (11) is outwardly inclined from bottom to top, the outer diameter of the outer bevel ring (11) is such that the outer bevel ring (11) cannot enter the chuck sleeve (2), an inner bevel ring (12) capable of upwardly extruding the outer bevel ring (11) is inwardly arranged on the inner circle of the lower end of the lower threaded chuck sleeve (5), a plurality of lower gap grooves (13) penetrating the outer bevel ring (11) are formed on the spring chuck sleeve (9) from bottom to top, each lower gap groove (13) does not penetrate the spring chuck sleeve (9) upwardly, and a plurality of upper gap grooves (14) are formed on the spring chuck sleeve (9) from top to bottom between each two lower gap grooves (13), each upper gap groove (14) does not penetrate the spring chuck sleeve (9) downwardly. An inclined edge protrusion (15) is outwardly arranged above each lower gap groove (13) on the upper edge of the spring chuck sleeve (9), each inclined edge protrusion (15) is outwardly inclined from top to bottom, and an inner bevel ring (16) capable of extruding the inclined edge protrusion (15) is arranged on the inner circle of the lower end of the upper threaded chuck sleeve (7), and a plurality of limiting sliding grooves (17) corresponding to the inclined edge protrusions (15) are formed along the length direction of the upper external thread section (4).

2. A cutter holder for a milling machine according to claim 1, wherein Inner chuck rings (10) are arranged on the inner sides of the upper and lower ends of the spring chuck sleeve (9), each lower gap groove (13) penetrates the lower inner chuck ring (10), and each upper gap groove (14) penetrates the upper inner chuck ring (10).

3. A cutter holder for a milling machine according to claim 1, wherein Each limiting sliding groove (17) penetrates the lower external thread section (3) downwardly.

4. The tool holder for a milling machine as defined in claim 1, wherein, A plurality of first clamping grooves (6) are circumferentially arranged along the length direction of the outer periphery of the lower threaded chuck sleeve (5).

5. The tool holder for a milling machine as defined in claim 1, wherein, A plurality of second clamping grooves (8) are circumferentially arranged along the length direction of the outer periphery of the upper threaded chuck sleeve (7).

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