Milling cutter support for numerical control machine tool

Abstract

The milling cutter support for the numerical control machine tool comprises a rotating motor, a rotating shaft of the rotating motor is connected with a supporting rod through a coupler, a support disc is arranged at the top of the supporting rod, a plurality of sets of clamping jaw assemblies used for clamping a milling cutter are evenly distributed on the support disc in the circumferential direction, and each clamping jaw assembly comprises a clamping jaw body. According to the milling cutter support, the clamping jaw assembly of the milling cutter support is optimized, and the risk that the clamping degree of the clamping jaws is weakened in the long-term use process, and consequently a milling cutter falls off in the follow-up cutter changing process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control machine tool equipment, and in particular relates to a milling cutter bracket used for a numerical control machine tool. Background Art

[0002] CNC machine tools are a new type of automated machine tools that are created by adding a programmable controller (i.e., a PLC industrial control system) to a traditional milling machine. Their operation mainly relies on the relative movement between the high-speed rotating milling cutter on the working head and the workpiece, thereby achieving the purpose of cutting the workpiece into a specified shape by the milling cutter.

[0003] Among them, in order to cope with the processing of different workpieces, CNC machine tools will be equipped with a milling cutter holder, also known as a tool magazine, which will wait until one workpiece is processed before starting the milling operation of the next workpiece; it is convenient to quickly replace the milling cutter. However, the milling cutter holder equipped with existing CNC machine tools mostly directly consists of tough parts, that is, it is directly composed of materials such as plastic or rubber. This method mainly relies on the performance of the material itself to achieve rigid expansion to clamp and place the milling cutter. However, it is found in the long-term use process that this kind of clamping that relies on the rigid expansion of the material itself will weaken the clamping degree with multiple placements, causing the subsequent milling cutter to tilt after placement, thereby resulting in the risk of the milling cutter falling during the subsequent tool changing process. In order to optimize this solution, practitioners have designed a milling cutter holder for CNC machine tools. Utility Model Content

[0004] The purpose of the utility model is to provide a milling cutter holder for a CNC machine tool in order to solve the problem that the clamping degree of the claw assembly of the existing milling cutter holder is weakened during long-term use, which easily causes the risk of the milling cutter falling during the subsequent tool changing process.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a milling cutter support for a CNC machine tool, comprising a rotating motor, the rotating shaft of the rotating motor is connected to a support rod through a coupling, a support plate is arranged on the top of the support rod, and the support plate is evenly distributed along the circumferential direction with a plurality of groups of claw assemblies for clamping the milling cutter;

[0006] The clamping jaw assembly comprises a clamping jaw body, in which two groups of clamping jaws are relatively rotatably arranged, and a driving assembly for imparting clamping force to the clamping jaws is arranged between the clamping jaw body and the clamping jaws.

[0007] Furthermore, the support plate is sleeved on the top of the support rod.

[0008] Furthermore, a rubber pad is provided on the inner wall of the clamping claw, and an anti-slip protrusion is provided on the end of the clamping portion of the clamping claw.

[0009] Furthermore, the driving assembly includes a driven gear plate arranged at the end of the claw, the driven gear plate and the claw are integrated, the two groups of driven gear plates are meshed with each other, a driving gear plate is arranged on the claw body, the driving gear plate is meshed with one group of the driven gear plates, and a driving motor for driving the driving gear plate to rotate is arranged at the bottom of the claw body.

[0010] Furthermore, the tooth grooves of one group of the driven gear plates occupy half of the circumference, and the end portions of the tooth grooves are provided with limiting protrusions.

[0011] Furthermore, the driving assembly is directly composed of a torsion spring, and the torsion spring is arranged between the claw body and the claw.

[0012] Beneficial effects: The utility model has reasonable design, simple and stable structure, strong practicality, and has the following beneficial effects:

[0013] 1. The connection between the support rod and the bracket plate allows the bracket plate to be quickly removed, making it convenient for subsequent maintenance of the claw assembly above it;

[0014] 2. The claw structure of the claw assembly can ensure that the surface of the milling cutter will not be scratched due to the strong clamping force, and can also ensure stability after clamping;

[0015] 3. The specific structural setting of the clamping jaw assembly can achieve a certain expansion angle and clamping force adjustment between the clamping jaws through the driving motor, which is more stable to use and the clamping degree will not weaken with long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the drive assembly of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0019] In the figure: 1-rotating motor, 2-coupling, 3-support rod, 4-support plate, 5-claw assembly;

[0020] 501-claw body, 502-claw, 503-driving assembly, 504-anti-drop protrusion;

[0021] 5031-driven gear disc, 5032-driving gear disc, 5033-driving motor, 5034-limiting protrusion, 5035-torsion spring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Embodiment 1:

[0024] Combination Figure 1-2 The milling cutter bracket for a CNC machine tool shown in the figure comprises a rotating motor 1, the rotating shaft of the rotating motor 1 is connected to a support rod 3 through a coupling 2, and bolt holes are arranged on the rotating motor 1, so that it is convenient to install it on the CNC machine tool equipment by bolts later. In addition, the rotating motor 1 is used to drive the support rod 3 to drive the support plate 4 to rotate, so as to rotate the milling cutters with different surfaces on it to the tool changing position, and a support plate 4 is arranged on the top of the support rod 3, and a plurality of groups of claw assemblies 5 for clamping the milling cutter are evenly distributed along the circumferential direction of the support plate 4, and the support plate 4 is sleeved on the top of the support rod 3. Such a setting mode facilitates the subsequent quick removal of the support plate 4, so as to realize the regular maintenance of the claw assembly 5 placed thereon;

[0025] The clamping jaw assembly 5 includes a clamping jaw body 501, which is fixedly arranged on the bracket plate 4. The fixing method is not limited and can be bolted or welded. Two groups of clamping jaws 502 are arranged to rotate relatively in the clamping jaw body 501. The inner wall of the clamping jaw 502 is provided with a rubber pad. The rubber pad is to prevent the surface of the milling cutter from being scratched when the clamping force of the clamping jaw 502 is large. The end of the clamping part of the clamping jaw 502 is provided with an anti-slip protrusion 504. The anti-slip protrusion 504 is provided because the clamping jaw 502 itself is in an arc shape. When the two clamping jaws 502 act on each other to achieve clamping, there is still a large gap between the two. The anti-slip protrusion 504 can ensure the stability of the milling cutter after clamping to a certain extent. A driving assembly 503 that gives the clamping jaw 502 a clamping force is provided between the clamping jaw body 501 and the clamping jaw 502. The driving assembly 503 can ensure the clamping effect of the clamping jaw 502 on the milling cutter in a long-term and stable manner.

[0026] The driving assembly 503 includes a driven toothed disc 5031 arranged at the end of the claw 502. The driven toothed disc 5031 and the claw 502 are integrated. The two groups of driven toothed discs 5031 are meshed with each other. A driving toothed disc 5032 is arranged on the claw body 501. The driving toothed disc 5032 is meshed with one group of driven toothed discs 5031. A driving motor 5033 for driving the driving toothed disc 5032 to rotate is arranged at the bottom of the claw body 501. The driving assembly 503 realizes linkage control through the driving motor 5033. The driving motor 5033 is a motor that can be stopped suddenly. During use, the driving motor 5033 is used to slowly drive the driving toothed disc 5032 to rotate, and then the driving toothed disc 5032 drives one group of driven toothed discs 5031 to rotate. Due to the meshing of the two groups of driven toothed discs 5031, synchronous rotation operation can be achieved, and finally the claw 502 is driven to open and close to take and place the milling cutter.

[0027] In this embodiment, the tooth grooves of one group of driven tooth discs 5031 occupy half of the circumference. This arrangement can ensure the expansion angle of the claw 502 within the specified stroke. The end of the tooth groove is provided with a limiting protrusion 5034. The limiting protrusion 5034 is used to limit the rotation of the driven tooth disc 5031 to the corresponding tooth groove end to avoid continued rotation causing the two groups of driven tooth discs 5031 to not engage and unable to achieve reciprocating operation.

[0028] Embodiment 2: The driving component 503 in the embodiment 2 is improved on the basis of the above embodiment. The technical contents disclosed in the above embodiment are not described repeatedly. The contents of the above disclosed embodiment also belong to the contents disclosed in the embodiment 2.

[0029] One embodiment of the present invention, in combination with Figure 3 The driving assembly 503 shown is directly composed of a torsion spring 5035, and the torsion spring 5035 is arranged between the claw body 501 and the claw 502. The specific use process of this arrangement is similar to relying on the hard expansion clamping of the material itself, but the expansion clamping force it brings is mainly achieved by the torsion force of the torsion spring 5035. In this way, even if the torsion force of the torsion spring 5035 decreases, it is sufficient to replace the torsion spring 5035. Therefore, the driving assembly 503 of this embodiment has a shorter service life and weaker control than that of embodiment 1, but its subsequent maintenance cost is small.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A milling cutter support for a numerically controlled machine tool, comprising a rotary motor (1), wherein a rotary shaft of the rotary motor (1) is connected to a support rod (3) via a coupling (2), wherein: A support plate (4) is arranged on the top of the support rod (3), and a plurality of groups of claw assemblies (5) for clamping the milling cutter are evenly distributed along the circumferential direction on the support plate (4); The clamping jaw assembly (5) comprises a clamping jaw body (501), two groups of clamping jaws (502) are arranged in the clamping jaw body (501) for relative rotation, and a driving assembly (503) for applying clamping force to the clamping jaws (502) is arranged between the clamping jaw body (501) and the clamping jaws (502).

2. A milling cutter support for a CNC machine tool according to claim 1, characterized in that: The support plate (4) is sleeved on the top of the support rod (3).

3. A milling cutter support for a CNC machine tool according to claim 2, characterized in that: A rubber pad is provided on the inner wall of the clamping claw (502), and an anti-slip protrusion (504) is provided on the end of the clamping portion of the clamping claw (502).

4. A milling cutter support for a CNC machine tool according to claim 3, characterized in that: The driving assembly (503) comprises a driven toothed disc (5031) arranged at the end of the claw (502); the driven toothed disc (5031) and the claw (502) are arranged in an integrated manner; two groups of the driven toothed discs (5031) mesh with each other; a driving toothed disc (5032) is arranged on the claw body (501); the driving toothed disc (5032) meshes with one group of the driven toothed discs (5031); and a driving motor (5033) for driving the driving toothed disc (5032) to rotate is arranged at the bottom of the claw body (501).

5. A milling cutter support for a CNC machine tool according to claim 4, characterized in that: The tooth grooves of one group of the driven toothed discs (5031) occupy half of the circumference, and the end portions of the tooth grooves are provided with limiting protrusions (5034).

6. The milling cutter support for a CNC machine tool according to claim 3, characterized in that: The driving assembly (503) is directly composed of a torsion spring (5035), and the torsion spring (5035) is arranged between the clamping claw body (501) and the clamping claw (502).

Images