Multi-station rotary cutter head

Abstract

This invention discloses a multi-station rotary cutting head, comprising a base, a cutting disc rotatably mounted on the base, and a plurality of tool holder shafts arranged circumferentially on the cutting disc for mounting cutting tools. The base contains a main shaft coaxial with the tool holder shafts and a first drive mechanism for driving the main shaft to rotate. A telescopic shaft is inserted into the main shaft, and the main shaft and telescopic shaft are keyed together. A first main coupling is provided at the front end of the telescopic shaft. A second drive mechanism is provided on the base for driving the telescopic shaft to move axially. A first driven coupling is provided on the rear side of the tool holder shaft in conjunction with the first main coupling. A third drive mechanism is provided on the base to drive the cutting disc to sequentially rotate the tool holder shafts to coaxial positions with the main shaft. This invention, by rotating the cutting disc on the base, allows different tool holders to engage with the drive shafts on the base, and different cutting tools can be mounted on the tool holders, thereby achieving automatic tool adjustment and improving the efficiency of multi-step machining.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, and more particularly to a multi-station rotary cutting head. Background Technology

[0002] In existing technologies, the processing of workpiece surfaces mainly includes steps such as milling, drilling, and tapping. The multi-step processing mainly relies on manual replacement or adjustment of tools multiple times, resulting in low efficiency in tool head assembly and disassembly, which affects the processing progress of the workpiece. Summary of the Invention

[0003] The purpose of this invention is to avoid the shortcomings of the prior art and provide a multi-station rotary cutter head, thereby effectively solving the shortcomings of the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a multi-station rotary cutter head, including a base, a cutter disc rotatably mounted on the base, a plurality of cutter holder shafts for mounting cutters arranged circumferentially on the cutter disc, a main shaft coaxial with the cutter holder shafts and a first drive mechanism for driving the main shaft to rotate in the base, a telescopic shaft inserted into the main shaft, the main shaft and the telescopic shaft being keyed together, a first main coupling being provided at the front end of the telescopic shaft, a second drive mechanism for driving the telescopic shaft to move axially in the base, a first driven coupling being provided at the rear side of the cutter holder shaft in conjunction with the first main coupling; and a third drive mechanism being provided in the base for driving the cutter disc to rotate the cutter holder shafts sequentially to be coaxial with the main shaft.

[0005] Furthermore, the tool holder shaft is a hollow shaft, including a boring tool holder shaft. A tool adjusting shaft is coaxially mounted within the boring tool holder shaft via bearings. A flat rotating disk is located at the front end of the boring tool holder shaft, and a screw is rotatably and vertically mounted within the flat rotating disk. The tool adjusting shaft rotates in conjunction with the screw via a bevel gear. A slider is screwed onto the screw, and the boring tool is fixed to the slider. Both the main shaft and the telescopic shaft are hollow. A central shaft is coaxially mounted within the main shaft. The front end of the central shaft is connected via a key to a second main coupling that can move axially with the telescopic shaft. A second driven coupling is mounted at the rear end of the tool adjusting shaft in conjunction with the second main coupling. A fourth drive mechanism for driving the central shaft to rotate is mounted on the machine base.

[0006] Furthermore, the fourth drive mechanism is a motor mounted on the base, the motor is connected to the central shaft, and a bearing is provided between the central shaft and the main shaft.

[0007] Furthermore, the second drive mechanism is a hydraulic cylinder mounted on the base, and the telescopic shaft is provided with an annular push groove. A lever that can be locked in the push groove is connected to the output shaft of the hydraulic cylinder.

[0008] Furthermore, the first drive mechanism is a motor mounted on the base, and a drive gear is mounted on the output shaft of the motor. The drive gear drives the main shaft to rotate through a gear set.

[0009] Furthermore, the third drive mechanism includes a gear ring coaxially mounted on the cutter head, a driven coupling gear meshing on the gear ring, a main coupling gear cooperating with the driven coupling gear and a fifth drive mechanism for driving the main coupling gear to move axially on the machine base, the main coupling gear meshing with the drive gear.

[0010] Furthermore, the first driven coupling is mounted on the tool holder shaft, and the first driven coupling and the tool holder shaft are keyed together. The first driven coupling is provided with a retaining protrusion, and the tool disc is provided with a retaining groove with a front opening to cooperate with the retaining protrusion. The tool holder shaft is provided with a spring that tends to force the first driven coupling to move backward.

[0011] Furthermore, the tool holder shaft is provided with a limiting ring that blocks the first backward movement from the coupling.

[0012] The above-mentioned technical solution of the present invention has the following beneficial effects: The present invention allows different tool holders to cooperate with the drive shaft on the machine base by rotating the tool disc on the machine base, and different tools can be installed on the tool holder, thereby realizing the function of automatic tool adjustment, improving the efficiency of multi-step processing, and having strong practicality. Attached Figure Description

[0013] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0014] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0017] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0018] Figure 6 This is a perspective view of Embodiment 2 of the present invention;

[0019] Figure 7 This is a cross-sectional view of Embodiment 2 of the present invention. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0021] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] like Figure 1-7 As shown, the multi-station rotary cutter head described in this embodiment includes a base 1, a cutter head 2 rotatably mounted on the base 1, a plurality of cutter holder shafts 3 for mounting cutters arranged circumferentially on the cutter head 2, a main shaft 4 coaxial with the cutter holder shafts 3 and a first drive mechanism 5 for driving the main shaft 4 to rotate are provided in the base 1, a telescopic shaft 6 is inserted into the main shaft 4, the main shaft 4 and the telescopic shaft 6 are keyed together, a first main coupling 7 is provided at the front end of the telescopic shaft 6, a second drive mechanism 8 is provided on the base 1 for driving the telescopic shaft 6 to move axially, a first slave coupling 9 is provided on the rear side of the cutter holder shaft 3 in conjunction with the first main coupling 7; a third drive mechanism is provided on the base 1 for driving the cutter head 2 to rotate the cutter holder shafts 3 sequentially to the coaxial position with the main shaft 4;

[0023] During operation, the second drive mechanism 8 drives the telescopic shaft 6 forward until the telescopic shaft 6 engages with the rear side of the first slave coupling 9 and the tool holder shaft 3 via the first main coupling 7. Then, the first drive mechanism 5 drives the main shaft 4 to rotate, and the main shaft 4, telescopic shaft 6, and tool holder shaft 3 rotate coaxially, causing the tool on the tool holder shaft 3 to rotate. The tool holder shaft 3 can be equipped with various tools such as boring tools, multi-spindle heads, milling cutters, and drills. When it is necessary to change the tool type or tool specification, the first drive mechanism 5 stops driving the main shaft 4 to rotate, the second drive mechanism 8 drives the telescopic shaft 6 to retract, disengaging the telescopic shaft 6 from the tool holder shaft 3. The third drive mechanism drives the cutter head 2 to rotate, rotating the tool holder shaft 3, which is equipped with the required tool, to a position coaxial with the main shaft 4. Then, the second drive mechanism 8 drives the telescopic shaft 6 forward to engage with the tool holder shaft 3, and the first drive mechanism 5 drives the main shaft 4, telescopic shaft 6, and tool holder shaft 3 to rotate. In this embodiment, there are 6 tool holder shafts 3 arranged circumferentially on the cutter head 2.

[0024] Preferably, the tool holder shaft 3 is a hollow shaft, including a boring bar holder shaft 31, which is specifically used to mount an adjustable boring bar. An adjusting shaft 10 is coaxially mounted within the boring bar holder shaft 31 via bearings. A flat rotating plate 11 is located at the front end of the boring bar holder shaft 31, and a screw 12 is rotatably and vertically mounted within the flat rotating plate 11. The adjusting shaft 10 rotates in conjunction with the screw 12 via a bevel gear. A slider 13 is screwed onto the screw 12, and the boring bar is fixed to the slider 13. Both the main shaft 4 and the telescopic shaft 6 are hollow. A central shaft 14 is coaxially mounted within the main shaft 4. The front end of the central shaft 14 is connected via a key to a second main coupling 15 that can move axially with the telescopic shaft 6. A second driven coupling 16 is mounted at the rear end of the adjusting shaft 10 in conjunction with the second main coupling 15. A fourth drive motor for driving the central shaft 14 to rotate is mounted on the machine base 1. Structure 17; During operation, the second drive mechanism 8 drives the telescopic shaft 6 to extend forward, and the telescopic shaft 6 simultaneously pushes against the second main coupling 15 to move forward. The front end of the telescopic shaft 6 cooperates with the tool holder shaft 3, and at the same time, the second main coupling 15 cooperates with the second slave coupling 16 at the rear end of the tool adjusting shaft 10. The rotation of the central shaft 14 can drive the tool adjusting shaft 10 to rotate, and then drive the screw 12 to rotate through the bevel gear, so that the slider 13 on the screw 12 moves along the screw 12, realizing the relative distance between the boring tool and the tool adjusting shaft 10, that is, adjusting the rotation radius of the boring tool, and realizing the adjustment of the boring tool. At this time, the first drive mechanism 5 can drive the main shaft 4, the telescopic shaft 6 and the tool holder shaft 3 to rotate, while the second drive mechanism 8 can drive the central shaft 14, the tool adjusting shaft 10 and the screw 12 to rotate, driving the slider 13 and the boring tool to move, realizing the tool adjustment work.

[0025] Preferably, the second drive mechanism 8 is a hydraulic cylinder mounted on the base 1. The telescopic shaft 6 is provided with an annular push groove. The output shaft of the hydraulic cylinder is connected to a lever 18 that can be locked in the push groove. The hydraulic cylinder drives the telescopic shaft 6 to move axially through the lever 18.

[0026] Preferably, the first drive mechanism 5 is a motor mounted on the base 1, and the output shaft of the motor is provided with a drive gear 19, which drives the main shaft 4 to rotate through a gear set;

[0027] Example 1: The cutter head 2 is obliquely mounted on the machine base 1, the motor of the first drive mechanism 5 is parallel to the main shaft 4, and the drive gear 19 directly engages with the gear 20 mounted on the main shaft 4 for transmission.

[0028] The fourth drive mechanism 17 is a motor mounted on the base 1. The motor is connected to the central shaft 14. A bearing is provided between the central shaft 14 and the main shaft 4 so that the central shaft 14 and the main shaft 4 can rotate relative to each other.

[0029] The third drive mechanism includes a gear ring 21 coaxially mounted on the cutter head 2, a transmission gear 22 meshing on the gear ring 21, the transmission gear 22 being connected to a driven gear 24 via a universal coupling 23, a main coupling gear 25 cooperating with the driven gear 24 and a fifth drive mechanism driving the main coupling gear 25 to move axially on the machine base 1, the main coupling gear 25 meshing with the drive gear 19; preferably, the fifth drive mechanism is a cylinder;

[0030] Example 2: The cutter head 2 is horizontally mounted on the machine base 1, and the motor of the first drive mechanism 5 is vertically mounted to the main shaft 4. A bevel gear is mounted on the output shaft of the motor to connect and transmit power to the main shaft 4.

[0031] The motor of the fourth drive mechanism 17 is also set perpendicular to the central shaft 14, and a bevel gear is set on the output shaft of the motor to connect and transmit power to the rear end of the central shaft 14;

[0032] The third drive mechanism includes a gear ring 21 coaxially mounted on the cutter head 2, a driven coupling gear 24 meshing on the gear ring 21, a main coupling gear 25 cooperating with the driven coupling gear 24 and a fifth drive mechanism 26 driving the main coupling gear 25 to move axially on the machine base 1, and the main coupling gear 25 meshing with the drive gear 19.

[0033] Preferably, the first slave coupling 9 is mounted on the tool holder shaft 3, and the first slave coupling 9 and the tool holder shaft 3 are keyed together. The first slave coupling 9 is provided with a retaining protrusion 27, and the tool disc 2 is provided with a front-opening groove 28 to cooperate with the retaining protrusion 27. The tool holder shaft 3 is provided with a spring 29 that tends to force the first slave coupling 9 to move backward. During operation, the telescopic shaft 6 extends forward, the first main coupling 7 presses against the first slave coupling 9 to compress the spring 29, and at the same time, the retaining protrusion 27 on the first slave coupling 9 disengages from the groove 28, so that the tool holder shaft 3 can rotate with the first slave coupling 9. When not in operation, the retaining protrusion 27 is locked in the groove 28 to prevent the first slave coupling 9 from rotating, thus fixing the tool and improving safety.

[0034] Preferably, the tool holder shaft 3 is provided with a limiting ring to block the first driven coupling 9 from moving backward. The limiting ring can limit the movement of the first driven coupling 9 at a certain distance behind it, thereby blocking the first driven coupling 9 and improving stability.

[0035] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-station rotary cutting head, characterized in that: The system includes a base on which a cutter head is rotatably mounted. Several tool holder shafts for mounting tools are circumferentially arranged on the cutter head. The base contains a main shaft coaxial with the tool holder shafts and a first drive mechanism for driving the main shaft. A telescopic shaft is inserted into the main shaft, and the main shaft and telescopic shaft are keyed together. A first main coupling is located at the front end of the telescopic shaft. The base also contains a second drive mechanism for driving the telescopic shaft to move axially. A first driven coupling is located at the rear of the tool holder shaft, cooperating with the first main coupling. A third drive mechanism on the base drives the cutter head to rotate the tool holder shafts sequentially to positions coaxial with the main shaft. During operation, the second drive mechanism drives the telescopic shafts to move forward. The main spindle rotates until the telescopic shaft engages with the rear side of the first driven coupling and the tool holder shaft via the first main coupling. Then, the first drive mechanism drives the main spindle to rotate, and the main spindle, telescopic shaft, and tool holder shaft rotate coaxially, causing the tool on the tool holder shaft to rotate. When it is necessary to change the tool type or tool specification, the first drive mechanism stops driving the main spindle to rotate, the second drive mechanism drives the telescopic shaft to retract, disengaging the telescopic shaft from the tool holder shaft, and the third drive mechanism drives the tool disc to rotate, rotating the tool holder shaft with the required tool to a position coaxial with the main spindle. Then, the second drive mechanism drives the telescopic shaft forward to engage with the tool holder shaft, and the first drive mechanism drives the main spindle, telescopic shaft, and tool holder shaft to rotate. The tool holder shaft is a hollow shaft, including a boring tool holder shaft. A tool adjusting shaft is coaxially mounted within the boring tool holder shaft via bearings. A flat rotating disk is located at the front end of the boring tool holder shaft, and a screw is rotatably and vertically mounted within the rotating disk. The tool adjusting shaft rotates via a bevel gear engaging with the screw. A slider is screwed onto the screw, and the boring tool is fixed to the slider. Both the main shaft and the telescopic shaft are hollow. A central shaft is coaxially mounted within the main shaft. The front end of the central shaft is connected via a key to a second main coupling that can move axially with the telescopic shaft. A second driven coupling is mounted at the rear end of the tool adjusting shaft in conjunction with the second main coupling. A fourth drive mechanism for driving the central shaft to rotate is mounted on the machine base. At this time, the second drive mechanism drives the telescopic shaft to extend forward, and the telescopic shaft simultaneously pushes against the second main coupling to move forward. The front end of the telescopic shaft engages with the tool holder shaft, and at the same time, the second main coupling engages with the second slave coupling at the rear end of the tool adjusting shaft. The rotation of the central shaft can drive the tool adjusting shaft to rotate, and then drive the screw to rotate through the bevel gear, so that the slider on the screw moves along the screw, realizing the relative distance between the boring tool and the tool adjusting shaft, that is, adjusting the rotation radius of the boring tool, and realizing the adjustment of the boring tool. At this time, the first drive mechanism can drive the main shaft, telescopic shaft and tool holder shaft to rotate, while the second drive mechanism can drive the central shaft, tool adjusting shaft and screw to rotate, driving the slider and boring tool to move, realizing the tool adjustment work. The first driven coupling is mounted on the tool holder shaft, and the first driven coupling and the tool holder shaft are keyed together. The first driven coupling is provided with a retaining protrusion, and the tool disc is provided with a front-opening retaining groove to cooperate with the retaining protrusion. The tool holder shaft is provided with a spring that tends to force the first driven coupling to move backward. During operation, the telescopic shaft extends forward, the first main coupling presses against the first driven coupling to compress the spring, and at the same time, the retaining protrusion on the first driven coupling disengages from the retaining groove, allowing the tool holder shaft to rotate with the first driven coupling. When not in operation, the retaining protrusion is locked in the retaining groove to prevent the first driven coupling from rotating, thus fixing the tool and improving safety.

2. The multi-station rotary cutter head according to claim 1, characterized in that: The fourth drive mechanism is a motor mounted on the base, which is connected to the central shaft, and a bearing is provided between the central shaft and the main shaft.

3. The multi-station rotary cutting head according to claim 1, characterized in that: The second drive mechanism is a hydraulic cylinder mounted on the base. The telescopic shaft is provided with an annular push groove, and the output shaft of the hydraulic cylinder is connected to a lever that can be locked in the push groove.

4. The multi-station rotary cutter head according to claim 1, characterized in that: The first drive mechanism is a motor mounted on the base. The output shaft of the motor is equipped with a drive gear, which drives the main shaft to rotate through a gear set.

5. The multi-station rotary cutter head according to claim 4, characterized in that: The third drive mechanism includes a gear ring coaxially mounted on the cutter head, a driven coupling gear meshing on the gear ring, a main coupling gear cooperating with the driven coupling gear and a fifth drive mechanism for driving the main coupling gear to move axially on the machine base, the main coupling gear meshing with the driving gear.

6. The multi-station rotary cutter head according to claim 1, characterized in that: The tool holder shaft is provided with a limiting ring to prevent the first movement backward from the coupling.

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