Tool holder structure of numerical control gear cutting machine

Abstract

The utility model discloses a numerical control gear cutting machine's tool apron structure, including tool rotation chuck, tool apron subassembly and carrier, tool apron subassembly includes swing plate and longitudinal slide, swing plate rotation setting is in the carrier, is equipped with A axle drive mechanism of swing plate left and right swing of control in the carrier, tool rotation chuck is equipped with seat bush, and seat bush sets up on the longitudinal slide, is equipped with chuck drive mechanism on seat bush, is equipped with Y axle moving mechanism for driving longitudinal slide longitudinal movement on swing plate, and tool rotation chuck is equipped with tool clamping part. The tool apron of this high accuracy numerical control gear cutting machine realizes longitudinal adjustment on swing plate, and the longitudinal slide of tool apron subassembly can better bear tool rotation chuck, avoids the cantilever support of tool apron, improves its rigidity.

Description

Technical Field

[0001] This utility model relates to a CNC gear turning machine, and more particularly to a tool holder structure for a CNC gear turning machine. Background Technology

[0002] Chinese Patent Publication No. CN218335356U, published on January 17, 2023, discloses a novel gear turning machine, comprising a machine body, a workpiece turntable mounted on the machine body, a B-axis gear cutting tool device, an X-axis moving mechanism for driving the workpiece turntable to move, a Z-axis moving mechanism for driving the B-axis gear cutting tool device to move vertically, a Y-axis moving mechanism for driving the Z-axis moving mechanism to move horizontally, and an A-axis rotating mechanism for driving the B-axis gear cutting tool device to rotate relative to the Z-axis moving mechanism. This structure has the following drawbacks: the distance between the gear cutting tool and the rotation center line of the A-axis rotating mechanism cannot be adjusted; furthermore, because the A-axis rotating mechanism is mounted on the Z-axis moving mechanism, and the Z-axis moving mechanism is mounted on the Y-axis moving mechanism, and the A-axis rotating mechanism is a relatively small turntable, while the inherent size of the B-axis gear cutting tool device on which the gear cutting tool is mounted is relatively long, the distance between the mounted position of the gear cutting tool and the rotation center line of the A-axis rotating mechanism is relatively large, resulting in a cantilever structure with poor stress distribution, affecting rigidity and machining accuracy.

[0003] In addition, because the diameter of the turntable of the A-axis rotary mechanism is small, it is easy to have a large deviation when controlling its rotation angle to adjust the angle of the cutting tool far from its center, that is, the adjustment accuracy requirement is very high. Utility Model Content

[0004] The purpose of this utility model is to provide a tool holder structure for a CNC gear turning machine with a reasonable structure and precise and convenient adjustment of the A-axis rotation angle.

[0005] The purpose of this utility model is achieved as follows: A tool holder structure for a CNC gear turning machine includes a tool rotating chuck, a tool holder assembly, and a carrier. The tool holder assembly includes a swing disk and a longitudinal slide plate. The swing disk is rotatably mounted on the carrier. The carrier is provided with an A-axis drive mechanism for controlling the swing disk to swing left and right. A seat is provided outside the tool rotating chuck. The seat is mounted on the longitudinal slide plate. The seat is provided with a chuck drive mechanism. The swing disk is provided with a Y-axis moving mechanism for driving the longitudinal slide plate to move longitudinally. The tool rotating chuck is provided with a tool clamping part.

[0006] The objective of this utility model can also be achieved by the following technical measures: As a more specific embodiment, the swing disk is fan-shaped, and the lower end of the swing disk is rotatably engaged with the lower end of the carrier via a rotating shaft; the upper outer circumference of the swing disk is provided with an arc-shaped toothed surface; the A-axis drive mechanism includes a drive gear and a swing angle control servo motor, the swing angle control servo motor is connected to the drive gear, and the drive gear meshes with the arc-shaped toothed surface.

[0007] As a further embodiment, the swing angle of the swing disk is within 20 degrees.

[0008] As a further embodiment, the swing angle of the swing disk is within 17.5 degrees.

[0009] As a further embodiment, the tool clamping part is located near the rotation center line of the oscillating disk.

[0010] As a further embodiment, the longitudinal slide plate is longitudinally slidably mounted on the swing disk, and the Y-axis moving mechanism includes a longitudinal control screw transmission pair, which is connected between the swing disk and the longitudinal slide plate and controls the longitudinal movement of the longitudinal slide plate.

[0011] As a further embodiment, the Y-axis moving mechanism also includes a support plate, a longitudinal linear guide rail, and a longitudinal slider. The support plate is disposed on the swing disk, the longitudinal linear guide rail and the longitudinal slider slide against each other and are respectively connected to the support plate and the longitudinal sliding plate. The longitudinal control screw transmission pair is connected between the support plate and the longitudinal sliding plate. The support plate and the longitudinal sliding plate are located above the rotation center line of the swing disk.

[0012] As a further embodiment, a braking mechanism is provided between the carrier and the swing plate. The braking mechanism includes a hydraulic cylinder and a pressure block. An arc-shaped guide groove is provided on the swing plate around its rotation center line. The inner sidewall of the arc-shaped guide groove is provided with a stepped surface or a conical surface that is wider at the front and narrower at the back. The pressure block is disposed in the arc-shaped guide groove. The hydraulic cylinder is disposed on the rear side of the carrier. The piston rod of the hydraulic cylinder passes through the arc-shaped guide groove and is connected to the pressure block for transmission. The pressure block presses against the stepped surface or conical surface of the arc-shaped guide groove to achieve braking.

[0013] As a further embodiment, the rear end of the rotating shaft extends beyond the rear end of the carrier and is provided with a brake disc, and damping brakes are provided on both sides of the carrier corresponding to the brake disc.

[0014] The beneficial effects of this utility model are as follows: (1) The tool holder of this high-precision CNC gear turning machine is longitudinally adjusted on the swing plate. The longitudinal slide of the tool holder assembly can better support the tool rotating chuck, avoid the tool holder being cantilevered, and improve its rigidity.

[0015] (2) The tool clamping part of this high-precision CNC gear turning machine is close to the rotation center line of the swing disk, that is, the cutting edge point of the tool is close to the rotation center line of the swing disk. Therefore, the position of the gear turning tool is easier to calculate and the error is relatively small. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Another structural diagram from a different angle.

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the BB cross-section structure.

[0020] Figure 5 This is an exploded structural diagram of the present invention.

[0021] Figure 6 for Figure 5 Another structural diagram from a different angle. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments: See Figures 1-6 As shown, a tool holder structure for a CNC gear turning machine includes a tool rotating chuck 6, a tool holder assembly, and a carrier 3. The tool holder assembly includes a swing disk 4 and a longitudinal slide plate 5. The swing disk 4 is rotatably mounted on the carrier 3. The carrier 3 is provided with an A-axis drive mechanism for controlling the swing disk 4 to swing left and right. The tool rotating chuck 6 is provided with a seat 61, which is mounted on the longitudinal slide plate 5. The seat 61 is provided with a chuck drive mechanism. The swing disk 4 is provided with a Y-axis moving mechanism for driving the longitudinal slide plate 5 to move longitudinally. The tool rotating chuck 6 is provided with a tool clamping part D.

[0023] The swing disk 4 is fan-shaped, and the lower end of the swing disk 4 is rotatably engaged with the lower end of the carrier 3 through a rotating shaft 42; the upper outer periphery of the swing disk 4 is provided with an arc-shaped tooth surface 41; the A-axis drive mechanism includes a drive gear 21 and a swing angle control servo motor 2, the swing angle control servo motor 2 is connected to the drive gear 21, and the drive gear 21 meshes with the arc-shaped tooth surface 41.

[0024] The swing angle of the swing disk 4 is within 17.5 degrees, that is, with the initial position of the drive gear 21 and the arc-shaped tooth surface 41 in the middle, the swing angle is 0, and the maximum swing angle on the left and right sides is 17.5 degrees.

[0025] The tool clamping part D is close to the rotation center line A of the swing disk 4.

[0026] The longitudinal slide plate 5 is longitudinally slidably mounted on the swing disk 4. The Y-axis moving mechanism includes a longitudinal control screw transmission pair 54, which is connected between the swing disk 4 and the longitudinal slide plate 5 and controls the longitudinal movement of the longitudinal slide plate 5.

[0027] The Y-axis moving mechanism also includes a support plate 51, a longitudinal linear guide rail 52, and a longitudinal slider 53. The support plate 51 is disposed on the swing disk 4. The longitudinal linear guide rail 52 and the longitudinal slider 53 slide against each other and are respectively connected to the support plate 51 and the longitudinal slide plate 5. The longitudinal control screw transmission pair 54 is connected between the support plate 51 and the longitudinal slide plate 5. The support plate 51 and the longitudinal slide plate 5 are located above the rotation center line A of the swing disk 4.

[0028] A braking mechanism is provided between the carrier 3 and the swing disk 4. The braking mechanism includes a hydraulic cylinder 7 and a pressure block 71. An arc-shaped guide groove 44 is provided on the swing disk 4 around its rotation center line A. The inner sidewall of the arc-shaped guide groove 44 is provided with a stepped surface or a conical surface that is wider at the front and narrower at the back. The pressure block 71 is disposed in the arc-shaped guide groove 44. The hydraulic cylinder 7 is disposed on the rear side of the carrier 3. The piston rod of the hydraulic cylinder 7 passes through the arc-shaped guide groove 44 and is connected to the pressure block 71. The pressure block 71 presses against the stepped surface or conical surface of the arc-shaped guide groove 44 to achieve braking. Figure 1-4 There is only one central braking mechanism; Figure 5 and Figure 6 The diagram shows two sets, left and right, indicating that there may be one or two braking mechanisms.

[0029] The rear end of the rotating shaft 42 extends beyond the rear end of the carrier 3 and is provided with a brake disc 43. Damping brakes 47 are provided on both sides of the carrier 3 corresponding to the brake disc 43.

[0030] The side of the swing disk 4 opposite to the carrier 3 is provided with a rear smooth arc-shaped contact surface 45 and a front smooth arc-shaped contact surface 31 respectively corresponding to the rear end of the arc-shaped guide groove 44; the side of the swing disk 4 and the carrier 3 opposite to each other is provided with a rear smooth annular contact surface 46 and a front smooth annular contact surface 32 respectively corresponding to the periphery of the rotating shaft 42; through the above-mentioned smooth surface contact structure, the relative stability between the swing disk 4 and the carrier 3 can be improved.

[0031] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A tool holder structure for a numerically controlled gear cutting machine, comprising a tool rotating chuck (6), a tool holder assembly and a carrier (3), characterized in that: The tool holder assembly includes a swing disk (4) and a longitudinal slide plate (5). The swing disk (4) is rotatably mounted on a carrier (3). The carrier (3) is provided with an A-axis drive mechanism to control the swing disk (4) to swing left and right. A seat (61) is provided outside the tool rotating chuck (6). The seat (61) is mounted on the longitudinal slide plate (5). A chuck drive mechanism is provided on the seat (61). A Y-axis moving mechanism is provided on the swing disk (4) to drive the longitudinal slide plate (5) to move longitudinally. The tool rotating chuck (6) is provided with a tool clamping part (D).

2. The tool holder structure of the numerically controlled gear tooth cutting machine according to claim 1, wherein: The swing disk (4) is fan-shaped, and the lower end of the swing disk (4) is rotatably engaged with the lower end of the carrier (3) through a rotating shaft (42); the upper end of the swing disk (4) is provided with an arc-shaped tooth surface (41); the A-axis drive mechanism includes a drive gear (21) and a swing angle control servo motor (2), the swing angle control servo motor (2) is connected to the drive gear (21) for transmission, and the drive gear (21) meshes with the arc-shaped tooth surface (41).

3. The tool holder structure for a numerically controlled gear cutting machine according to claim 1 or 2, wherein: The swinging angle of the swinging disk (4) is within 20 degrees.

4. The tool holder structure of claim 3 wherein: The swing angle of the swing disk (4) is within 17.5 degrees.

5. The tool holder structure of claim 1 wherein: The tool clamping part (D) is close to the rotation center line (A) of the swing disk (4).

6. The tool holder structure of claim 1 wherein: The longitudinal slide plate (5) is longitudinally slidably mounted on the swing disk (4). The Y-axis moving mechanism includes a longitudinal control screw transmission pair (54), which is connected between the swing disk (4) and the longitudinal slide plate (5) and controls the longitudinal movement of the longitudinal slide plate (5).

7. The tool holder structure of claim 6 wherein: The Y-axis moving mechanism also includes a support plate (51), a longitudinal linear guide (52), and a longitudinal slider (53). The support plate (51) is mounted on the swing disk (4). The longitudinal linear guide (52) and the longitudinal slider (53) slide against each other and are respectively connected to the support plate (51) and the longitudinal slide plate (5). The longitudinal control screw transmission pair (54) is connected between the support plate (51) and the longitudinal slide plate (5). The support plate (51) and the longitudinal slide plate (5) are located above the rotation center line (A) of the swing disk (4).

8. The tool holder structure of claim 3 wherein: A braking mechanism is provided between the carrier (3) and the swing disk (4). The braking mechanism includes a hydraulic cylinder (7) and a pressure block (71). An arc-shaped guide groove (44) is provided on the swing disk (4) around its rotation center line (A). The inner sidewall of the arc-shaped guide groove (44) is provided with a stepped surface or a conical surface that is wider at the front and narrower at the back. The pressure block (71) is set in the arc-shaped guide groove (44). The hydraulic cylinder (7) is set on the rear side of the carrier (3). The piston rod of the hydraulic cylinder (7) passes through the arc-shaped guide groove (44) and is connected to the pressure block (71) in a transmission connection. The pressure block (71) is pressed against the stepped surface or conical surface of the arc-shaped guide groove (44) to achieve braking.

9. The tool holder structure of claim 2 wherein: The rear end of the rotating shaft (42) extends beyond the rear end of the carrier (3) and is provided with a brake disc (43). Damping brakes (47) are provided on both sides of the carrier (3) corresponding to the brake disc (43).

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