CN114559141A

CN114559141A - Novel plasma rotary groove cutting machine

Info

Publication number: CN114559141A
Application number: CN202210348067.9A
Authority: CN
Inventors: 郑维; 桂蒙东; 徐国良; 史志玮; 戴正寰
Original assignee: Anhui Construction Engineering Steel Structure Intelligent Manufacturing Co ltd
Current assignee: Anhui Construction Engineering Steel Structure Intelligent Manufacturing Co ltd
Priority date: 2022-04-03
Filing date: 2022-04-03
Publication date: 2022-05-31

Abstract

The invention relates to the technical field of cutting machines, in particular to a novel plasma rotary groove cutting machine which comprises a base, wherein a transverse plate seat is arranged on the upper side of the base, a U-shaped frame is arranged on the transverse plate seat, a cutting machine body is arranged on the U-shaped frame, a transverse moving assembly is arranged on the transverse plate seat and used for driving the cutting machine body to transversely move, two groups of longitudinal moving assemblies are arranged on the lower side of the transverse plate seat and used for driving the cutting machine body to longitudinally move; the position of the cutting machine body is flexibly adjusted, so that workpieces of different models are matched, the machining range is enlarged, manual operation is reduced, the machining of workers is facilitated, the whole structure is compared with the existing equipment, the occupied area is reduced, the automation program is high, and the machining efficiency is effectively improved.

Description

Novel plasma rotary groove cutting machine

Technical Field

The invention relates to the technical field of cutting machines, in particular to a novel plasma rotary groove cutting machine.

Background

The plasma cutting machine can be matched with different working gases to cut various metals which are difficult to cut by oxygen, and particularly has better cutting effect on nonferrous metals (aluminum, copper, titanium and nickel); the plasma cutting method has the main advantages that when metal with small thickness is cut, the plasma cutting speed is high, particularly when a common carbon steel sheet is cut, the speed can reach 5-6 times that of an oxygen cutting method, a cutting surface is smooth and clean, the thermal deformation is small, and a heat affected zone is almost absent.

In the traditional groove cutting technology, a grinding machine or metal cutting machining is generally adopted, time and labor are consumed, although the conventional plasma cutting machine is convenient to use, the size of the conventional plasma cutting machine is large, the use cost is high, the automation program is not high, the groove is cut by manual marking, the efficiency is low, the appearance forming is poor, and therefore the novel plasma rotary groove cutting machine is provided.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a novel plasma rotary groove cutting machine.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a novel plasma rotary groove cutting machine comprises a base, wherein a transverse plate seat is arranged on the upper side of the base, a U-shaped frame is arranged on the transverse plate seat, a cutting machine body is mounted on the U-shaped frame, a transverse moving assembly is arranged on the transverse plate seat and used for driving the cutting machine body to transversely move, two groups of longitudinal moving assemblies are arranged on the lower side of the transverse plate seat and used for driving the cutting machine body to longitudinally move; the during operation, the cutting machine body is located the upside that removes the wheel, the work piece is carried at the upside that removes the wheel, when removing to suitable position, it is tight with the work piece clamp to be close to each other through two holders, then the drive cutting machine body cuts the processing to the work piece, output through first positive and negative motor drives the rotation of second ball screw, can drive cutting machine body lateral shifting, output through the positive and negative motor of second drives first ball screw and rotates and can drive cutting machine body longitudinal movement, realize the position of nimble adjustment cutting machine body, thereby match the work piece of different models, increase the scope of processing, reduce manual operation, make things convenient for staff's processing, overall structure compares existing equipment, take up and reduce the area, the automation program is high, effectively improve machining efficiency.

Preferably, the transverse moving assembly comprises a second ball screw, a second screw sleeve and a first positive and negative motor, the upper end of the transverse plate seat is fixedly connected with two vertical plates, the second ball screw is rotatably connected between the two vertical plates, the first positive and negative motor is fixedly connected to the upper end of the transverse plate seat, the output end of the first positive and negative motor is fixedly connected to one end of the second ball screw, the second screw sleeve is in threaded connection with the circumferential surface of the second ball screw, and the U-shaped frame is fixedly connected to the lower end of the second screw sleeve; during operation, the output end of the first positive and negative motor drives the second ball screw to rotate, the second ball screw drives the second screw rod sleeve to move transversely, and the electric U-shaped frame of the second screw rod sleeve moves, so that the cutting machine body is driven to move transversely, and the transverse position of the cutting machine body is adjusted.

Preferably, each group of longitudinal moving assemblies comprises a longitudinal rail, a first ball screw, a first screw sleeve and a second positive and negative motor, the longitudinal rail is fixedly connected to the upper end of the base, the first ball screw is rotatably connected between the inner walls of the longitudinal rail, the first screw sleeve is in threaded connection with the circumferential surface of the cutting machine body, the second positive and negative motor is fixedly connected to one end of the longitudinal rail, the output end of the second positive and negative motor is fixedly connected to one end of the first ball screw, lifting assemblies are arranged between the longitudinal rail and the transverse plate seat and used for driving the cutting machine body to move up and down; during operation, two positive and negative motors of second are worked simultaneously, and the output through the positive and negative motor of second drives first ball screw and rotates, and first ball screw drives first lead screw cover longitudinal movement, drives horizontal plate seat longitudinal movement at last, realizes the longitudinal position of adjustment cutting machine body, reaches the purpose of nimble control cutting machine body position, reduces manual operation, improves the machining precision.

Preferably, each group of lifting assemblies comprises a sliding seat, a hollow frame and a second air cylinder, the sliding seat is fixedly connected to the upper end of the first screw rod sleeve, the hollow frame is fixedly connected to the upper end of the sliding seat, the transverse plate seat is fixedly connected into the hollow frame, the output end of the second air cylinder penetrates through the hollow frame and extends upwards, and the transverse plate seat is fixedly connected to the output end of the second air cylinder; during operation, two second cylinders work simultaneously, drive the diaphragm seat through the second cylinder output and reciprocate, and the diaphragm seat drives second lead screw cover and reciprocates to drive the cutting machine body and reciprocate, realize the height of nimble control cutting machine body, with the work piece of processing different models.

Preferably, two sides of the second screw rod sleeve are rotatably connected with first pulleys, the two first pulleys are rotatably connected to the upper end of the transverse plate seat, two sides of the two sliding seats are rotatably connected with second pulleys, and each second pulley is rotatably connected to the upper side of the longitudinal rail; the during operation drives two first pulleys and rolls when the second lead screw cover removes, and the second lead screw cover is located between two first pulleys for the second lead screw cover can not overturn when removing, improves stability, drives the slide and removes when the first lead screw cover removes like the above, through the second pulley setting at the slide two, keeps first lead screw cover and slide homoenergetic steady movement.

Preferably, the upper end of the base is fixedly connected with two first shaft brackets, a plurality of moving wheels are rotatably connected between the first shaft brackets, and the moving wheels are uniformly distributed; during operation, the moving wheel is located at the lower side of the cutting machine body, workpieces to be machined can be conveyed rapidly through the moving wheel, the diameters of the center part of the first shaft frame to the two sides are gradually increased, the workpieces can be maintained to move in the center when the workpieces are moved, and deviation is avoided.

Preferably, the upper end of the base is fixedly connected with a mounting frame and a support frame, the mounting frame is provided with a slide rail, the slide rail is connected with two clamping tools in a sliding manner, a first air cylinder is fixedly connected in the support frame, the output end of the first air cylinder is fixedly connected to one of the clamping tools, the mounting frame is provided with a reverse movement assembly, and the reverse movement assembly is used for driving the other clamping tool to move reversely; during operation, two holders all can be at mounting bracket upside rectilinear movement, and the output through first cylinder can drive one of them holder and remove, and two holders can press from both sides the work piece tight when being close to mutually to prevent that the position of work piece from taking place the skew when adding man-hour, remain stable processing, need not artifical supplementary, can effectively improve the machining precision.

Preferably, the reverse moving assembly comprises two transverse rails, two racks and a gear, the two transverse rails are fixedly connected between the inner walls of the mounting frame, the two racks are respectively and slidably connected to the upper side of one transverse rail, the two racks are respectively and fixedly connected to the lower end of one clamping tool, the gear is rotatably connected to the upper end of the base, and the two racks are both meshed with the gear; during operation, one of the clamping tools at the output end of the first air cylinder moves, the clamping tool drives one of the racks to move, the gear is meshed with the two racks, so that the two clamping tools are driven to move in opposite directions, and the transverse rail is used for keeping the racks to move linearly to play a limiting role.

Preferably, a groove is formed in the base, a conveying belt is installed in the groove, and the conveying belt is located on the lower side of the moving wheel; during operation, the waste materials during processing fall into the conveying belt, the waste materials can be conveyed and discharged through the conveying belt, automatic conveying of the waste materials is achieved, and manual cleaning is not needed.

Preferably, both sides of the base are fixedly connected with second shaft frames, and each second shaft frame is rotatably connected with a plurality of rollers; during operation, a plurality of gyro wheels evenly distributed, whole quality is born to can be fine, convenient the removal simultaneously.

Compared with the prior art, the invention has the following beneficial effects:

(1) the output through first positive and negative motor in this scheme drives the second ball screw and rotates, can drive cutting machine body lateral shifting, the output through second positive and negative motor drives first ball screw and rotates and can drive cutting machine body longitudinal movement, realize the position of nimble adjustment cutting machine body, thereby match the work piece of different models, increase process range, reduce manual operation, make things convenient for staff's processing, overall structure compares existing equipment, area is taken up and reduced, the automation program is high, effectively improve machining efficiency.

(2) Utilize gear and two rack meshes mutually in this scheme, drive two centre gripping utensils antiport, can press from both sides the work piece tight when two centre gripping utensils are close to mutually to prevent to add man-hour, the skew takes place for the position of work piece, and the processing that keeps stable need not artifical supplementary, can effectively improve the machining precision.

(3) The waste material of this scheme during processing drops to the conveyer belt in, can carry the ejection of compact with the waste material through the conveyer belt, realizes carrying the waste material automatically, need not the manual work and clears up.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic bottom view of the present invention;

FIG. 3 is a schematic view of the reverse moving assembly of the present invention;

FIG. 4 is a schematic illustration of the explosive structure of FIG. 3 according to the present invention

FIG. 5 is a schematic view of the longitudinal motion assembly of the present invention;

FIG. 6 is a schematic view of the lateral shifting assembly of the present invention.

In the figure: 1. a base; 2. a first pedestal; 3. a moving wheel; 4. a groove; 5. a conveyor belt; 6. a second shaft frame; 7. a roller; 9. a mounting frame; 10. a slide rail; 11. a holder; 12. a transverse rail; 13. a rack; 14. a gear; 15. a support frame; 16. a first cylinder; 17. a longitudinal rail; 18. a first ball screw; 19. a first screw rod sleeve; 20. hollowing out the frame; 21. a second cylinder; 22. a cross plate seat; 23. a vertical plate; 24. a second ball screw; 25. a second screw rod sleeve; 26. a first pulley; 27. a U-shaped frame; 28. a cutter body; 29. a first positive and negative motor; 30. a second positive and negative motor; 31. a slide base; 32. a second pulley.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

The novel plasma rotary groove cutting machine shown in fig. 1-4 comprises a base 1, wherein a transverse plate seat 22 is arranged on the upper side of the base 1, a U-shaped frame 27 is arranged on the transverse plate seat 22, a cutting machine body 28 is mounted on the U-shaped frame 27, a transverse moving assembly is arranged on the transverse plate seat 22 and used for driving the cutting machine body 28 to transversely move, two groups of longitudinal moving assemblies are arranged on the lower side of the transverse plate seat 22 and used for driving the cutting machine body 28 to longitudinally move; during operation, cutting machine body 28 is located the upside that removes wheel 3, the work piece is carried at the upside that removes wheel 3, when removing to suitable position, it is tight with the work piece clamp to be close to each other through two holders 11, then drive cutting machine body 28 and cut the processing to the work piece, output through first positive and negative motor 29 drives second ball screw 24 and rotates, can drive cutting machine body 28 lateral shifting, output through second positive and negative motor 30 drives first ball screw 18 and rotates and can drive cutting machine body 28 longitudinal movement, realize nimble position of adjusting cutting machine body 28, thereby match the work piece of different models, increase process range, reduce manual operation, make things convenient for staff's processing, overall structure compares existing equipment, take up and reduce the area, the automation program is high, effectively improve machining efficiency.

Specifically, the transverse moving assembly comprises a second ball screw 24, a second screw sleeve 25 and a first positive and negative motor 29, two vertical plates 23 are fixedly connected to the upper end of the transverse plate seat 22, the second ball screw 24 is rotatably connected between the two vertical plates 23, the first positive and negative motor 29 is fixedly connected to the upper end of the transverse plate seat 22, the output end of the first positive and negative motor 29 is fixedly connected to one end of the second ball screw 24, the second screw sleeve 25 is in threaded connection with the circumferential surface of the second ball screw 24, and the U-shaped frame 27 is fixedly connected to the lower end of the second screw sleeve 25; during operation, the output end of the first positive and negative motor 29 drives the second ball screw 24 to rotate, the second ball screw 24 drives the second screw sleeve 25 to move transversely, and the electric U-shaped frame 27 of the second screw sleeve 25 moves so as to drive the cutting machine body 28 to move transversely, thereby realizing the adjustment of the transverse position of the cutting machine body 28.

Specifically, each group of longitudinal moving assemblies comprises a longitudinal rail 17, a first ball screw 18, a first screw sleeve 19 and a second positive and negative motor 30, the longitudinal rail 17 is fixedly connected to the upper end of the base 1, the first ball screw 18 is rotatably connected between the inner walls of the longitudinal rail 17, the first screw sleeve 19 is in threaded connection with the circumferential surface of the cutting machine body 28, the second positive and negative motor 30 is fixedly connected to one end of the longitudinal rail 17, the output end of the second positive and negative motor 30 is fixedly connected to one end of the first ball screw 18, a lifting assembly is arranged between the longitudinal rail 17 and the transverse plate seat 22 and used for driving the cutting machine body 28 to move up and down; when the cutting machine works, the two second positive and negative motors 30 work simultaneously, the output ends of the second positive and negative motors 30 drive the first ball screw 18 to rotate, the first ball screw 18 drives the first screw sleeve 19 to move longitudinally, and finally the transverse plate seat 22 is driven to move longitudinally, so that the longitudinal position of the cutting machine body 28 is adjusted, the purpose of flexibly controlling the position of the cutting machine body 28 is achieved, manual operation is reduced, and the machining precision is improved.

Specifically, each group of lifting assemblies comprises a sliding seat 31, a hollow frame 20 and a second air cylinder 21, the sliding seat 31 is fixedly connected to the upper end of the first screw rod sleeve 19, the hollow frame 20 is fixedly connected to the upper end of the sliding seat 31, the transverse plate seat 22 is fixedly connected to the inside of the hollow frame 20, the output end of the second air cylinder 21 penetrates through the hollow frame 20 and extends upwards, and the transverse plate seat 22 is fixedly connected to the output end of the second air cylinder 21; during operation, two second cylinders 21 work simultaneously, drive horizontal plate seat 22 through second cylinder 21 output and reciprocate, and horizontal plate seat 22 drives second lead screw cover 25 and reciprocates to drive cutting machine body 28 and reciprocate, realize the height of nimble control cutting machine body 28, with the work piece of processing different models.

Specifically, two sides of the second screw rod sleeve 25 are rotatably connected with first pulleys 26, two first pulleys 26 are rotatably connected to the upper end of the transverse plate seat 22, two sides of the two sliding seats 31 are rotatably connected with second pulleys 32, and each second pulley 32 is rotatably connected to the upper side of the longitudinal rail 17; during operation, the second lead screw cover 25 drives the two first pulleys 26 to roll when moving, the second lead screw cover 25 is located between the two first pulleys 26, the second lead screw cover 25 cannot turn over when moving, stability is improved, the sliding seat 31 is driven to move when the first lead screw cover 19 moves in the same way, the second lead screw cover 32 is arranged on the sliding seat 31 in two, and the first lead screw cover 19 and the sliding seat 31 can be kept to move stably.

Specifically, the upper end of the base 1 is fixedly connected with two first shaft brackets 2, a plurality of moving wheels 3 are rotatably connected between the first shaft brackets 2, and the moving wheels 3 are uniformly distributed; during operation, the moving wheel 3 is located on the lower side of the cutting machine body 28, workpieces to be machined can be conveyed rapidly through the moving wheel 3, the diameters of the center part of the first shaft frame 2 from the center part to the two sides are gradually increased, the workpieces can be maintained to move in the center when the workpieces are moved, and deviation is avoided.

Specifically, the upper end of the base 1 is fixedly connected with an installation frame 9 and a support frame 15, a slide rail 10 is arranged on the installation frame 9, two clamps 11 are slidably connected on the slide rail 10, a first air cylinder 16 is fixedly connected in the support frame 15, the output end of the first air cylinder 16 is fixedly connected to one of the clamps 11, a reverse moving assembly is arranged on the installation frame 9, and the reverse moving assembly is used for driving the other clamp 11 to move reversely; during operation, two holders 11 all can be at the 9 upside rectilinear movement of mounting bracket, can drive one of them holders 11 through the output of first cylinder 16 and remove, can press from both sides the work piece tight when two holders 11 are close to mutually to prevent that the position of work piece from taking place the skew when adding man-hour, remain stable processing, need not artifical supplementary, can effectively improve the machining precision.

Specifically, the reverse movement assembly comprises two transverse rails 12, two racks 13 and a gear 14, wherein the two transverse rails 12 are fixedly connected between the inner walls of the mounting rack 9, the two racks 13 are respectively and slidably connected to the upper side of one transverse rail 12, the two racks 13 are respectively and fixedly connected to the lower end of one clamping tool 11, the gear 14 is rotatably connected to the upper end of the base 1, and the two racks 13 are both meshed with the gear 14; when the clamping device works, one of the clamping devices 11 moves through the output end of the first air cylinder 16, the clamping device 11 drives one of the racks 13 to move, the gear 14 is meshed with the two racks 13, so that the two clamping devices 11 are driven to move in the opposite directions, and the transverse rail 12 is used for keeping the racks 13 to move linearly to play a limiting role.

Specifically, a groove 4 is formed in the base 1, a conveying belt 5 is installed in the groove 4, and the conveying belt 5 is located on the lower side of the moving wheel 3; during operation, the waste material during processing drops to the conveyer belt 5 in, can carry the ejection of compact with the waste material through conveyer belt 5, realizes carrying the waste material automatically, need not the manual work and clears up.

Specifically, two sides of the base 1 are fixedly connected with second shaft frames 6, and each second shaft frame 6 is rotatably connected with a plurality of rollers 7; during operation, a plurality of gyro wheels 7 evenly distributed, whole quality is born to can be fine, simultaneously convenient the removal.

The working principle of the invention is as follows: the upside at removal wheel 3 carries the work piece, when removing to suitable position, it is tight with the work piece clamp to be close to each other through two holders 11, then drive cutting machine body 28 and carry out cutting process to the work piece, output through first positive and negative motor 29 drives second ball screw 24 and rotates, can drive cutting machine body 28 lateral shifting, output through second positive and negative motor 30 drives first ball screw 18 and rotates and can drive cutting machine body 28 longitudinal movement, realize the position of nimble adjustment cutting machine body 28, thereby match the work piece of different models, increase the scope of working, reduce manual operation, make things convenient for staff's processing, overall structure compares existing equipment, take up and reduce area, the automation program is high, effectively improve machining efficiency.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. The utility model provides a novel plasma gyration groove cutting machine, includes base (1), its characterized in that, the upside of base (1) is provided with horizontal plate seat (22), be provided with U-shaped frame (27) on horizontal plate seat (22), install cutting machine body (28) on U-shaped frame (27), be provided with the lateral shifting subassembly on horizontal plate seat (22), the lateral shifting subassembly is used for driving cutting machine body (28) lateral shifting, the downside of horizontal plate seat (22) is provided with two sets of longitudinal movement subassemblies, the longitudinal movement subassembly is used for driving cutting machine body (28) longitudinal shifting.

2. The novel plasma rotary groove cutting machine according to claim 1, wherein the transverse moving assembly comprises a second ball screw (24), a second screw sleeve (25) and a first forward and reverse motor (29), the upper end of the cross plate base (22) is fixedly connected with two vertical plates (23), the second ball screw (24) is rotatably connected between the two vertical plates (23), the first forward and reverse motor (29) is fixedly connected with the upper end of the cross plate base (22), the output end of the first forward and reverse motor (29) is fixedly connected with one end of the second ball screw (24), the second screw sleeve (25) is in threaded connection with the circumferential surface of the second ball screw (24), and the U-shaped frame (27) is fixedly connected with the lower end of the second screw sleeve (25).

3. The novel plasma rotary groove cutting machine according to claim 2, wherein each set of the longitudinal moving components comprises a longitudinal rail (17), a first ball screw (18), a first screw sleeve (19) and a second positive and negative motor (30), the longitudinal rail (17) is fixedly connected to the upper end of the base (1), the first ball screw (18) is rotatably connected between the inner walls of the longitudinal rail (17), the first screw rod sleeve (19) is connected with the circumferential surface of the cutter body (28) in a threaded manner, the second positive and negative motor (30) is fixedly connected with one end of the longitudinal rail (17), the output end of the second positive and negative motor (30) is fixedly connected with one end of the first ball screw (18), and a lifting assembly is arranged between the longitudinal rail (17) and the transverse plate seat (22) and is used for driving the cutting machine body (28) to move up and down.

4. The novel plasma rotary groove cutting machine according to claim 3, wherein each group of the lifting assemblies comprises a sliding seat (31), a hollow frame (20) and a second air cylinder (21), the sliding seat (31) is fixedly connected to the upper end of the first screw rod sleeve (19), the hollow frame (20) is fixedly connected to the upper end of the sliding seat (31), the cross plate seat (22) is fixedly connected to the inside of the hollow frame (20), the output end of the second air cylinder (21) penetrates through the hollow frame (20) and extends upwards, and the cross plate seat (22) is fixedly connected to the output end of the second air cylinder (21).

5. The novel plasma rotary groove cutting machine according to claim 4, wherein the two sides of the second screw rod sleeve (25) are rotatably connected with first pulleys (26), two first pulleys (26) are rotatably connected with the upper end of the cross plate seat (22), two sliding seats (31) are rotatably connected with second pulleys (32) on two sides, and each second pulley (32) is rotatably connected with the upper side of the longitudinal rail (17).

6. The novel plasma rotary groove cutting machine according to claim 5, characterized in that two first shaft brackets (2) are fixedly connected to the upper end of the base (1), a plurality of moving wheels (3) are rotatably connected between the first shaft brackets (2), and the moving wheels (3) are uniformly distributed.

7. The novel plasma rotary groove cutting machine according to claim 6, characterized in that: the utility model discloses a quick-witted, including base (1), slide rail (10) have been seted up on mounting bracket (9), the upper end fixedly connected with mounting bracket (9) and support frame (15) of base (1), sliding connection has two holders (11) on slide rail (10), the first cylinder of fixedly connected with (16) in support frame (15), the output end fixed connection of first cylinder (16) is in one of them holder (11), be provided with the reverse movement subassembly on mounting bracket (9), the reverse movement subassembly is used for driving another holder (11) reverse movement.

8. The novel plasma rotary groove cutting machine according to claim 7, characterized in that: the reverse movement assembly comprises two transverse rails (12), two racks (13) and a gear (14), wherein the transverse rails (12) are fixedly connected between the inner walls of the mounting rack (9), the racks (13) are respectively connected to the upper side of one transverse rail (12) in a sliding mode and are fixedly connected to the lower end of one clamping tool (11), the gear (14) is rotatably connected to the upper end of the base (1), and the racks (13) are meshed with the gear (14).

9. The novel plasma rotary groove cutting machine according to claim 8, characterized in that: be provided with recess (4) on base (1), install conveyer belt (5) in recess (4), conveyer belt (5) are located the downside that removes wheel (3).

10. The novel plasma rotary groove cutting machine according to claim 8, characterized in that: the two sides of the base (1) are fixedly connected with second shaft frames (6), and each second shaft frame (6) is connected with a plurality of rollers (7) in a rotating mode.