A redundant drive ring cutting mechanism

Abstract

The present invention discloses a redundant drive ring cutting mechanism. The base and the ring cutting mechanism are connected by two sets of linear modules in the horizontal and vertical directions. The ring cutting mechanism is located on the base and consists of a connecting plate, a cutter head, a tool holder, a cutting blade, and a ring cutting mechanism base. One end of the connecting plate is connected to the ring cutting mechanism base, and the other end is hinged to the cutter head. The present invention realizes ring cutting by redundantly driving the connecting rod to rotate by two cutter head drive motors. The base moves in a plane to control the ring cutting feed rate, and removes materials based on its annular envelope cutting method. Therefore, it is more uniform during cutting or grinding, and the mechanism has high stiffness, simple structure, and is easy to control. By replacing the size of the blade and the connecting plate and adopting cutting blades or grinding discs of different materials, it can adapt to different cutting work scenarios.

Description

Technical Field

[0001] The present invention belongs to the components of data metal cutting machine tools in intelligent processing equipment, and particularly relates to a redundant drive circumferential cutting mechanism, which can be used for cutting pipes. Background Art

[0002] At present, cutting methods at home and abroad can be divided into two categories: taking the rotation of the workpiece as the main movement and taking the rotation of the tool as the main movement, each having its own advantages and disadvantages. Among them, the circumferential cutting mechanism with the workpiece fixed and the rotation of the tool as the main movement has received extensive attention in working scenarios such as cutting flexible rotating shafts and pipes. The design of the circumferential cutting mechanism directly affects the performance of the machined workpiece.

[0003] At present, most circumferential cutting mechanisms at home and abroad drive the cutting disc to achieve circumferential movement for cutting by a rotatable fixed frame. This not only has a heavy driving load and high energy consumption, but also has poor stiffness and dynamic performance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is the technical problem that the existing circumferential cutting mechanism has a heavy driving load, poor stiffness and dynamic performance, and at the same time, it also solves the technical problem of insufficient rotational cutting torque at present. To solve the above problems, the present invention provides a redundant drive circumferential cutting mechanism. The base of the circumferential cutting mechanism of this circumferential cutting mechanism can move in a plane to control the circumferential cutting feed amount, and remove materials based on its annular envelope cutting method. Therefore, it is more uniform during cutting or grinding, and the mechanism has high stiffness, a simple structure and is easy to control.

[0005] The purpose of the present invention is achieved in the following way:

[0006] A redundant drive ring cutting mechanism includes a base. Above the base, a ring cutting mechanism is provided. A first linear module is arranged on the base. The first linear module is fixedly connected to the base through a vertically arranged fixing plate. The first linear module is driven by a first motor, and each first linear module corresponds to a slider. It also includes a connecting seat. The connecting seat and the slider corresponding to the first linear module are fixedly connected by bolts. The ring cutting mechanism is installed above a second linear module, and the second linear module is fixed on the connecting seat. The second linear module is driven by a second motor. The ring cutting mechanism is arranged on a ring cutting mechanism base. The ring cutting mechanism base is fixedly connected to the slider corresponding to the second linear module by bolts. Two drive motor bases are arranged on the ring cutting mechanism base, and a cutter head drive motor is installed on each of the two drive motor bases. The ring cutting mechanism includes two connecting plates with the same shape, a flange-shaped cutter head, a tool holder, and cutting blades. The two ends of the cutter head are respectively hinged to one end of the two connecting plates, and the other ends of the two connecting plates are respectively fixedly connected to the output shafts of the corresponding cutter head drive motors. The two connecting plates are arranged in parallel, and the connecting line L1 of the hinge points at both ends of the cutter head is parallel to the connecting line L2 of the two cutter head drive motor shafts. The two cutter head drive motors on the ring cutting mechanism drive the two connecting plates simultaneously with the same torque and the same output direction. The tool holder is fixed on the cutter head, and a blade drive motor is installed on the tool holder. The cutting blades are driven by the blade drive motor.

[0007] In the above redundant drive ring cutting mechanism, a number of tool holders are equidistantly arranged along the inner circle of the cutter head. The tool holders are fixed on the cutter head by bolts. The inner hole of the cutter head can be circular or other shapes, and the shape of the inner hole of the cutter head and the arrangement spacing of the tool holders can be changed according to the processing scenario.

[0008] In the above redundant drive ring cutting mechanism, there are two first linear modules. Each first linear module is connected to a first motor. The first motor is fixed above the first linear module. Each first linear module corresponds to a slider, and the slider is fixedly connected to the connecting seat. There is one second linear module, and the second linear module is connected to a second motor.

[0009] In the above redundant drive ring cutting mechanism, the blade drive motor includes a motor body installed on the tool holder, and also includes a connecting shaft, a clamping plate, and a pressing plate. The hole end of the connecting shaft is fixed to the output shaft of the blade drive motor by a set screw, and the other end is a threaded shaft and extends out of the other side of the cutter head as the rotating shaft of the cutting blade. Holes larger than the diameter of the connecting shaft are machined at the corresponding positions of the cutter head and the tool holder, so that the shaft end of the connecting shaft can extend to the other side of the cutter head. The cutting blade is sleeved on the shaft end of the connecting shaft, and the cutting blade is fixed by the clamping plate and the pressing plate.

[0010] In the above redundant drive ring cutting mechanism, the inner hole of the clamping plate is a through hole and a clamping position is provided on the side. The inner hole of the pressing plate is a threaded hole.

[0011] In the above redundant drive circular cutting mechanism, the output shaft of the blade drive motor is fixedly connected to the cutting blade through a connecting shaft, a clamping plate and a pressing plate.

[0012] The above redundant drive circular cutting mechanism further includes a controller, and the first motor, the second motor, the cutter head drive motor and the blade drive motor are respectively electrically connected to the controller.

[0013] For the prior art, the technical effects of the present invention are as follows: The present invention provides a redundant drive circular cutting mechanism that can achieve cutting and grinding, has a symmetric structure and high rigidity. Two drive motors on the base drive two connecting plates to rotate, so that the center of the blade moves on a circle with the midpoint of the connection line between the two motor shafts as the center and the distance between the hinge holes at both ends of the connecting plate as the radius. The circular envelope area formed by the movement track of the blade is the safety area retained after cutting. Through the redundant drive of two motors, not only can the dead points of the mechanism be eliminated, but also the rigidity is good. In this application, the base can move in the plane, which is convenient for selecting the circular cutting feed amount. The structure is simple, easy to control, has a fast movement speed and good dynamic response. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the redundant drive circular cutting mechanism of the present invention; Figure 1 ;

[0015] Figure 2 is a schematic structural diagram of the redundant drive circular cutting mechanism of the present invention; Figure 2 ;

[0016] Figure 3 is a schematic structural diagram of the circular cutting mechanism of the present invention;

[0017] Figure 4 is a structural diagram of the connecting plate of the present invention;

[0018] Figure 5 is a structural diagram of the cutter head drive motor of the present invention;

[0019] Figure 6 is a structural diagram of the cutter head of the present invention;

[0020] Figure 7 is a structural diagram of the tool holder of the present invention;

[0021] Figure 8 is a structural diagram of the cutting blade of the present invention;

[0022] Figure 9 is a structural diagram of the connecting shaft of the present invention;

[0023] Figure 10 is a structural diagram of the blade drive motor of the present invention;

[0024] Figure 11Schematic diagram of the parallel structure between the connecting line L1 of the hinge holes at both ends of the cutter head 6 and the connecting line L2 of the centers of the two cutter head drive motors in the redundant drive ring cutting mechanism of the present invention;

[0025] Figure 12 Schematic diagram of the cutting motion trajectory of the ring cutting mechanism of the present invention Figure 1 ;

[0026] Figure 13 Schematic diagram of the cutting motion trajectory of the ring cutting machine of the present invention Figure 2 。 Detailed implementation manners

[0027] An embodiment of the present invention provides a redundant drive ring cutting mechanism. To better describe the embodiments of the present invention, the specific embodiments of the present invention are now described in conjunction with the attached Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13 to illustrate the specific embodiments of the present invention.

[0028] As Figure 1-11A redundant drive ring cutting mechanism shown in the figure includes a base 1 and a ring cutting mechanism 2. The ring cutting mechanism 2 is arranged above the base 1. The bottom of the ring cutting mechanism 2 is arranged on the ring cutting mechanism base 21. The ring cutting mechanism base is fixed to a horizontal linear module, and the horizontal linear module is connected to the connecting seat 12 of the vertical linear module arranged on the base 1. Specific structure: A first linear module 11 is arranged on the base. The first linear module 11 is fixedly connected to the base through a vertically arranged fixing plate 14. The first linear module is driven by a first motor (not shown in the figure); it also includes a connecting seat 12. There is a slider 13 corresponding to the side of the first linear module 11. The connecting seat 12 is fixedly connected to the slider 13. A second linear module 3 is arranged on the connecting seat 12. The second linear module 3 is fixed to the connecting seat 12. The second linear module is driven by a second motor (not shown in the figure); the ring cutting mechanism 2 is installed above the second linear module 3. The ring cutting mechanism is arranged on the ring cutting mechanism base 21. The ring cutting mechanism base 21 is fixedly connected to the corresponding slider (not marked in the figure) of the second linear module 3 through bolts. Two drive motor bases 4 are arranged on the ring cutting mechanism base. A cutter head drive motor 41 is installed on each of the two drive motor bases 4; the two cutter head drive motors 41 are fixedly installed on the same side of the ring cutting mechanism base 21. The ring cutting mechanism includes two connecting plates 5 with the same shape, a flange-shaped cutter head 6, a tool holder 7, and a cutting blade 8. The tool holder 7 is fixedly installed in the cutter head 6. A number of tool holders 7 are arranged equidistantly along the inner circumference of the cutter head 6; one end of the tool holder 7 is fixed to the cutter head 6 through bolts, and the other end is fixed to the blade drive motor 9. The cutting blade 8 is driven to rotate by the high-torque blade drive motor 9. The output shaft of the blade drive motor 9 is fixedly connected to the cutting blade 8 through a connecting shaft 91, a clamping plate 92, and a pressing plate 93. The blade drive motor is also fixedly connected to the tool holder arranged on the cutter head 6, so that the cutting blade 8 moves with the cutter head 6. The tool holder 7 can be replaced with different cutting blades 8 according to working conditions. The inner hole of the cutter head 6 can be circular or other shapes, and the shape of the inner hole of the cutter head 6 and the arrangement spacing of the tool holders 7 can be changed according to the processing scenario.

[0029] There are two first linear modules. Each first linear module is connected to a first motor. The first motor is fixed on the base 1. Each first linear module corresponds to a slider, and the slider is fixed to the connecting seat; there is one second linear module. The second linear module is connected to a second motor. The second linear module corresponds to a slider.

[0030] Both ends of the cutter head 6 are respectively hinged to one end of the connecting plate. The other ends of the two connecting plates are respectively fixedly connected to the output shafts of the cutter head drive motors. The two connecting plates are arranged in parallel, as Figure 11As shown in the figure, the connection line L1 of the hinge holes at both ends of the cutter head 6 is parallel to the connection line L2 of the centers of the two cutter head drive motors. The two cutter head drive motors on the base of the circumferential cutting mechanism drive the two connecting plates simultaneously with the same torque and the same output direction. The tool rest 7 is fixed on the cutter head 6, and a number of tool rests 7 are arranged equidistantly along the circumference of the tool rest. The cutting blade 8 is driven by a blade drive motor 9.

[0031] A pair of vertically placed and parallelly arranged first linear modules are installed at the rear side of the base 1. A slider 13 is installed on the first linear module. The second linear module 3 is fixedly connected to the slider 13 through a connecting block 12. The base 21 of the circumferential cutting mechanism is placed on the second linear module 3 and is fixedly connected to the corresponding slider through bolts. A circumferential cutting mechanism 2 is installed on the upper side of the base 21 of the circumferential cutting mechanism. There are two corresponding first linear modules, and each first linear module is connected to a first motor. The first motor is fixed at the upper end of the linear module. Each first linear module corresponds to a slider, and all the sliders are fixedly connected to the connecting seat 12. The second linear module is one, and the second linear module is connected to a second motor. The second motor is fixed on the second linear module.

[0032] The slider 13 can move up and down on the first linear module, and the base 21 of the circumferential cutting mechanism can move horizontally on the second linear module 3.

[0033] The present invention further includes a controller, and the first motor, the second motor, the cutter head drive motor, and the blade drive motor are respectively electrically connected to the controller. The controller controls the cooperation of each motor to work.

[0034] The specific arrangement of the tool rest 7 and the blade drive motor 9 of the present invention is as follows: As Figure 3 and Figure 10 shown, one side of the frame body of the tool rest 7 is fixedly connected to the cutter head 6 through bolts, and the blade drive motor 9 is fixed on the other side of the frame body of the tool rest 7. The blade drive motor 9 further includes a connecting shaft 91, a clamping plate 92, and a pressing plate 93 in addition to the motor body fixed on the tool rest 7. The hole end of the connecting shaft 91 is fixedly connected to the output shaft of the blade drive motor 9 through a set screw. The other end of the connecting shaft 91 is a threaded shaft and extends out as the rotating shaft of the cutting blade 8. Holes larger than the diameter of the connecting shaft 91 are processed at the corresponding positions of the cutter head 6 and the tool rest 7, so that the shaft end of the connecting shaft 91 can extend to the other side of the cutter head. The cutting blade 8 is sleeved on the shaft of the connecting shaft 91, and the cutting blade 8 is fixed by the clamping plate 92 and the pressing plate 93. The inner hole of the clamping plate 92 is a through hole and is provided with a clamping position on the side. The inner hole of the pressing plate 93 is a threaded hole, and the cutting blade 8 is pressed by screwing with the threaded shaft of the connecting shaft 91. The output shaft of the blade drive motor 9 is fixedly connected to the cutting blade 8 through the connecting shaft 91, the clamping plate 92, and the pressing plate 93. The center lines of the cutting blade, the connecting shaft, and the output shaft of the blade drive motor are the same straight line.

[0035] The working principle of the present invention is as follows: The workpiece to be processed is fixedly placed in the middle of the cutter head 6 along its axial direction. Two cutter head driving motors 41 drive two connecting plates 5 to rotate simultaneously with the same torque and the same rotation direction. The rotation of the connecting plates 5 drives the cutter head 6 to move. Finally, the center of the inner circle of the cutter head 6 moves on a circle with the midpoint of the connection line of the two cutter head driving motors 41 as the center and the distance between the hinge holes 51 at both ends of the connecting plate as the radius. During operation, the working parameters of the two cutter head driving motors are the same, and the rotation directions of the output shafts are the same; the circular envelope area formed by the cutting motion trajectory of the cutting blades 8 arranged on the tool rest 7 is the safety area retained after cutting. The circumferential cutting mechanism 2 can move horizontally relative to the second linear module 3, and the second linear module 3 can move vertically relative to the first linear module 11. Therefore, the circumferential cutting mechanism 2 can achieve two-degree-of-freedom movement in the vertical plane, facilitating the control of the circumferential cutting feed amount and adapting to various working environments such as cutting or grinding. By changing the dimensions of the connecting plate 5, the flange-shaped cutter head 6, or the cutting blade 8, workpieces such as pipes or flexible shafts of different sizes can be processed.

[0036] The circular envelope area formed by the cutting motion trajectory of the circumferential cutting mechanism of the present invention is as Figure 12 shown; by controlling the circumferential cutting feed amount, the cutting motion trajectory of the present invention can also be quasi-square and can be used for cutting square pipes, as Figure 13 shown.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A redundant drive ring cutting mechanism, comprising a base (1), and a ring cutting mechanism (2) is arranged above the base (1), characterized in that: A first linear module (11) is arranged on the base. The first linear module (11) is fixedly connected to the base through a vertically arranged fixing plate (14). The first linear module (11) is driven by a first motor, and each first linear module corresponds to a slider. It further includes a connecting seat (12). The connecting seat (12) and the slider (13) corresponding to the first linear module are fixedly connected by bolts. The circumferential cutting mechanism (2) is installed above the second linear module (3). The second linear module (3) is fixed on the connecting seat (12). The second linear module (3) is driven by a second motor. The circumferential cutting mechanism (2) is arranged on a circumferential cutting mechanism base (21). The circumferential cutting mechanism base (21) is fixedly connected to the slider corresponding to the second linear module (3) by bolts. Two drive motor bases (4) are arranged on the circumferential cutting mechanism base. A cutter head drive motor (41) is installed on each of the two drive motor bases (4). The circumferential cutting mechanism includes two connecting plates (5) with the same shape, a flange-shaped cutter head (6), a tool holder (7), and cutting blades (8). One end of each of the two ends of the cutter head is hinged to one end of the two connecting plates respectively. The other ends of the two connecting plates are fixedly connected to the output shafts of the corresponding cutter head drive motors (41) respectively. The two connecting plates are arranged in parallel, and the connecting line L1 of the hinge points at both ends of the cutter head is parallel to the connecting line L2 of the two cutter head drive motor shafts. The two cutter head drive motors (41) on the circumferential cutting mechanism drive the two connecting plates simultaneously with the same torque and the same output direction. The tool holder (7) is fixed on the cutter head (6). A blade drive motor (9) is installed on the tool holder (7). The cutting blade (8) is driven by the blade drive motor (9). A plurality of tool holders (7) are arranged equidistantly along the inner circle of the cutter head (6).

2. The redundant drive ring cutting mechanism according to claim 1, wherein: The tool holder (7) is fixed to the cutter head (6) by bolts.

3. The redundant drive ring cutting mechanism according to claim 1, wherein: There are two first linear modules. Each first linear module is connected to a first motor. The first motor is fixed above the first linear module. Each first linear module corresponds to a slider, and the slider is fixed to the connecting seat. There is one second linear module, and the second linear module is connected to a second motor.

4. The redundant drive ring cutting mechanism according to claim 1, wherein: The blade drive motor (9) includes a motor body installed on the tool holder (7), and also includes a connecting shaft (91), a clamping plate (92), and a pressing plate (93). The hole end of the connecting shaft (91) is fixed to the output shaft of the blade drive motor (9) by a set screw. The other end is a threaded shaft and extends out of the other side of the cutter head as the rotating shaft of the cutting blade (8). Holes larger than the diameter of the connecting shaft (91) are machined at corresponding positions on the cutter head (6) and the tool holder (7), so that the shaft end of the connecting shaft (91) extends to the other side of the cutter head. The cutting blade (8) is sleeved on the shaft end of the connecting shaft (91), and the cutting blade (8) is fixed by the clamping plate (92) and the pressing plate (93).

5. The redundant drive ring cutting mechanism according to claim 4, characterized in that: The inner hole of the clamping plate (92) is a through hole and a clamping position is arranged on the side. The inner hole of the pressing plate (93) is a threaded hole.

6. The redundant drive ring cutting mechanism according to claim 4, characterized in that: The output shaft of the blade drive motor (9) is fixedly connected to the cutting blade (8) through the connecting shaft (91), the clamping plate (92), and the pressing plate (93).

7. The redundant drive ring cutting mechanism according to claim 3, wherein: It further includes a controller, and the first motor, the second motor, the cutter head drive motor, and the blade drive motor are respectively electrically connected to the controller.

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