Cutting device for steel pipe for motorcycle frame and steel pipe production system

Abstract

The invention relates to the technical field of steel pipe cutting, and particularly discloses a motorcycle frame steel pipe cutting device which comprises a laser cutting machine, a blanking grid and a material frame and further comprises a feeding guide assembly, and the feeding guide assembly is provided with a guide channel and a blanking channel which communicate with each other; the material frame is provided with a plurality of inclined supporting plates distributed along the height of the material frame, the distance between every two adjacent inclined supporting plates is larger than the diameter of a steel pipe, the side wall of the material frame is provided with a plurality of seesaws, the seesaws are rotationally connected to the wall of the material frame, and the seesaws are provided with counter weights. The bottom of the material frame is inclined; a limiting piece is fixed to the material frame and located below the lowermost seesaw, and the limiting piece abuts against the side, provided with the balance weight, of the seesaw in a free state. A steel pipe production system comprises the cutting device of the steel pipe for the motorcycle frame. The scheme is used for solving the problems that at present, after steel pipes are cut, falling workpieces are prone to being disordered and stacked in a material frame, manual special treatment is needed, labor cost is increased, and potential safety hazards are increased.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe cutting, and in particular to a steel pipe cutting device for a motorcycle frame and a steel pipe production system. Background Art

[0002] The motorcycle frame is a load-bearing part of the motorcycle, and is often formed by welding and assembling steel pipes that are bent into different shapes. In the traditional production of steel pipes, the outline is first cut by a cutting machine, and then the steel pipe is installed on a machine tool for hole processing; with the popularity of laser cutting, laser cutting can not only complete length cutting and end contour cutting in one clamping of the steel pipe, but also cut the holes in the steel pipe, meeting various cutting needs. Moreover, after one clamping and cutting, the part of the entire steel pipe that needs to be cut can basically be completed by a laser cutting machine, greatly improving production efficiency.

[0003] Laser cutting uses a focused high-power density laser beam to irradiate the workpiece, causing the irradiated material to melt, vaporize, ablate or reach ignition point rapidly, while using a high-speed airflow coaxial with the beam to blow away the molten material, thereby achieving the cutting of the workpiece.

[0004] In laser cutting, each time a workpiece is produced, the head end of the remaining steel pipe needs to be cut to cut out the head end contour of the next workpiece, which generates waste. Current laser cutting equipment does not have a separation structure for waste and workpieces, so that both the cut workpiece and the waste will fall into a messy pile under their own weight.

[0005] In the prior art, the patent announcement number CN112658510B is a laser tube cutting machine feeding device and its working method suitable for various tubes. The technology discloses the whole process from tube feeding, tube cutting, waste and workpiece separation, and workpiece unloading, etc., with a very high degree of automation, which solves the above-mentioned problem of waste and workpieces falling into a pile and being very chaotic. And for short workpieces, they directly fall along the blanking support box through the blanking grid, while for long tubes, they are unloaded from the unloading unit and the unloading machine. For the processing of steel tubes for motorcycle frames, the length of the steel tubes of motorcycle frames is short, and the cost of using the unloading unit and the unloading machine is high. A more suitable method is for the workpiece to roll from the grid to the blanking support box, and then fall into the material frame. However, this method of falling along the grid will still cause chaotic accumulation of workpieces in the material frame.

[0006] As for the reason for the mess, during laser cutting, the current more common method is for the fixture to rotate while holding the steel pipe, and the laser head is located above the steel pipe. The section of steel pipe being processed is the head end first and then the tail end. When the tail end is processed, the head end is in a cantilever state. When the tail end is processed, the head end contacts the unloading grid earlier than the tail end. Therefore, after falling along the grid, the workpiece cannot roll parallel to the material frame, causing the workpiece to be in a messy state in the material frame. The laser processing efficiency is high, and the residual heat of the laser on the workpiece also takes a certain amount of time to reduce to a safe temperature. Therefore, the workpiece cannot be sorted out manually at any time. After a period of laser cutting, the cutting needs to be stopped to facilitate manual work with heat-insulating gloves to neatly sort out the workpieces in the material frame. This method, on the one hand, increases labor costs, reduces production efficiency, and there are safety hazards. On the other hand, the method of manually wearing heat-insulating gloves for sorting is not conducive to safe production.

[0007] In addition, the steel pipes required for the production of motorcycle frames often need to be bent and formed after cutting. After bending and forming, they need to be stamped into specific shapes. However, the steel pipes used in different positions on the motorcycle frame are bent different times, resulting in the cutting process and the bending process being basically independent processes. The workpieces cut in the cutting process are stored in a material frame and then pulled to the bending process for bending and forming. After bending and forming, they are pulled from storage to the stamping process for stamping and forming, resulting in a high turnover rate and low efficiency of the entire steel pipe production system. However, if the conveying structure in the unloading machine of the above-mentioned patent is used for axial transportation, the axial length is too large and the requirements for the factory building are high. In particular, when the steel pipe raw materials are tens of meters long, the application of cutting devices with automatic loading and unloading in factories is further limited. Summary of the invention

[0008] The present invention is intended to provide a steel pipe cutting device for motorcycle frames to solve the problem that the cut workpiece and waste material cannot be separated after the steel pipe is cut, and even after separation, the fallen workpieces after cutting are easily piled up in the material frame, requiring manual special processing, resulting in increased labor costs and increased safety hazards.

[0009] In order to achieve the above object, the present invention adopts the following technical scheme:

[0010] A cutting device for steel pipes for motorcycle frames, comprising a laser cutting machine, a blanking grid and a material frame, and also comprising a feed guide assembly, wherein the feed guide assembly is provided with a guide channel and a blanking channel which are interconnected, the guide channel has a horn opening, the cross section of the guide channel is larger than the cross section of the blanking channel, and the width of the blanking channel is 1-1.5 times the width of the steel pipe;

[0011] The material frame is equipped with multiple inclined support plates distributed along the height of the material frame, and the spacing between adjacent inclined support plates is greater than the diameter of the steel pipe. Multiple seesaws for receiving materials are installed on the side wall of the material frame. The seesaws are rotatably connected to the wall of the material frame, and the part of the seesaw facing the outside of the material frame is equipped with a counterweight. The counterweight makes the side of the seesaw close to the empty space in the material frame tend to be upward in a free state without affecting the falling of the steel pipe;

[0012] The distance between the inclined upward end of the inclined support plate and the seesaw in a free state is greater than the diameter of a steel pipe, the bottom of the material frame is in an inclined state, the inclination direction of the bottom of the material frame is consistent with the inclination direction of the inclined support plate, the distance between adjacent seesaws is equal to the distance between adjacent inclined support plates, and the lower seesaw is pressed down by the steel pipe and rotated, and the adjacent upper seesaw can be pushed to rotate by the counterweight. After the lower inclined support plate is filled with steel pipes, the adjacent upper seesaw is in a state that enables the steel pipe to move along the non-counterweight end of the seesaw to the corresponding inclined support plate;

[0013] The blanking channel is located just above the gap between the inclined support plate and the seesaw, and the steel pipe moves from the blanking grid into the guide channel; a limit piece is fixed on the material frame, and the limit piece is located below the lowest seesaw. The limit piece and the side of the seesaw with a counterweight are offset against each other in a free state, so that the non-counterweight end of the lowest seesaw is located in the middle of the gap between the inclined support plate and the seesaw in the initial state. The lowest seesaw rotates to an inclined state after being subjected to the pressure of the steel pipe, and the inclination direction is consistent with the inclination direction of the bottom of the material frame.

[0014] The principle and advantage of this scheme are: when this scheme is adopted, the waste material and the cut steel pipe workpiece are automatically separated by the blanking grid, and the cut steel pipe workpiece falls along the blanking channel to the gap between the seesaw and the inclined support plate after adjusting the angle and position in the guide channel; when the material frame is empty, the steel pipe falls to the non-counterweight end of the lowest seesaw, because the initial state of the lowest seesaw is in the middle of the gap between the inclined support plate and the seesaw under the action of the limiter, so the steel pipe can receive the steel pipe when it falls on the lowest seesaw, and at the same time, the steel pipe also presses the non-counterweight end of the seesaw from the previous upward tilt to the tilted direction toward the bottom of the material frame, so that the steel pipe moves along the bottom of the material frame to gradually fill the bottom of the material frame. When the bottom of the material frame is not filled, after the steel pipe is moved out of the bottom seesaw, the seesaw returns to its original state under the counterweight to facilitate the fall of the next steel pipe.

[0015] After the bottom of the material frame is full, the adjacent upper seesaw also rotates a certain amount under the trigger of the rotation of the lower seesaw, so that the inclined support plate of this layer is gradually filled in the same way after the steel pipe falls, and so on until all the inclined support plates are filled with steel pipes. The whole process realizes the angle and orientation adjustment of the steel pipe through the feed guide assembly, so that it can move to the feeding position of the material frame along the defined channel, and realizes the automatic sorting and arrangement of the steel pipe in the material frame with the cooperation of the inclined support plate, the seesaw and the limiter. The whole process does not require human participation, and the part that requires manual arrangement is realized with a simple mechanical structure, which solves the problem that the cut workpiece and the waste material cannot be separated after the steel pipe is cut, and also solves the problem that the fallen steel pipes after cutting are easily piled up in the material frame and require special manual processing, which increases the labor cost and safety hazards.

[0016] Preferably, as an improvement, a discharge port is provided at the lowest end of the bottom position of the material frame, and a baffle is provided on the discharge port, the baffle can expose or block the discharge port, and the distance between the inclined support plate directly above the discharge port and the adjacent material frame wall is greater than the distance between one steel pipe, so that when the material frame is needed only for storing materials, it can be shielded by the baffle, and when the material frame needs to discharge the steel pipes, the baffle can be opened, so that the steel pipes can be automatically discharged one by one from the discharge port.

[0017] Preferably, as an improvement, the width of the discharge port is 2-3 times the diameter of the steel pipe, so that the steel pipe can more easily roll down to fit the inner wall of the material frame under an inclination, while at the same time being able to avoid the problem of the vertically falling steel pipe and the inclined moving steel pipe below blocking the falling space during the falling process with a relatively wide spacing, thereby ensuring that there will be no obstruction during discharge.

[0018] Preferably, as an improvement, the counterweight on the seesaw includes a short counterweight and a long counterweight, the short counterweight can be rotated to between the rotation centers of the upper and lower seesaws, the long counterweight is located outside the material frame, and a mounting groove for the seesaw is provided on the material frame. Under the free weight of the seesaw, the long counterweight abuts against the outer edge of the mounting groove so that the non-counterweight end of the seesaw can be located in the mounting groove, and both the short counterweight and the long counterweight can be used to push the adjacent upper seesaw to rotate, and the angle range of the seesaw relative to the free state is greater than 90° and less than 140°, so that the lower seesaw can rotate relative to the upper seesaw. After the steel pipe on the seesaw is removed, the upper seesaw rotates to a large enough angle under the pressure of the steel pipe to allow the upper steel pipe to move downward, so as to avoid the problem that the steel pipe on the seesaw is stuck between the nearby inclined support plate and the seesaw, ensuring that even if there are continuous steel pipes discharged from the lower discharge port, the steel pipe feeding in the material frame and the automatic neat arrangement of the steel pipes are not affected, so that the material frame can be used as both a material receiving container and a material discharging container, and when the discharge and receiving rhythms are inconsistent, the steel pipes that have been laser cut due to higher efficiency can still be temporarily stored in the material frame.

[0019] Preferably, as an improvement, the short counterweight and the long counterweight have the same cross-sectional dimensions to reduce manufacturing costs.

[0020] Preferably, as an improvement, the feed guide assembly also includes a single-sided guide channel, the guide surface of the single-sided guide channel faces the inside of the material frame, and the blanking channel and the single-sided guide channel at the bottom of the top guide channel form a situation where the size is the largest at the top and the smallest in the middle, and the size of the opening at the bottom is the second largest, so as to ensure accurate blanking, and automatically arrange the steel pipes neatly after there is no corresponding seesaw on the uppermost inclined support plate, and it is not easy for the steel pipes to get stuck at the discharge end of the feed guide assembly.

[0021] Preferably, as an improvement, the chuck of the laser cutting machine can rotate, and the laser head of the laser cutting machine is installed on a space moving module, which drives the laser head to move up and down and / or move axially along the chuck. A traction assembly is also installed on the space moving module, which drives the traction assembly to move axially along the chuck. The traction assembly includes a driver and symmetrical clamping blocks, and the driver drives the two clamping blocks to move closer to or away from each other to achieve clamping and releasing of the steel pipe. This solution enables the laser cutting machine to drive the steel pipe to be processed to move through the traction assembly, thereby simplifying the difficulty of moving the cut steel pipe.

[0022] Preferably, as an improvement, a movable roller is provided at the bottom of the material frame to facilitate the transfer of the material frame.

[0023] Preferably, as an improvement, the laser cutting machine is provided with an inclined surface, which is located in the falling direction of the steel pipe after being cut, and the inclined surface is inclined downward toward the material frame, the blanking grid is horizontal, the blanking grid is connected to the inclined surface, and the bell mouth of the feed guide assembly is composed of enclosed front and rear left and right side panels, one of which is located directly below the end of the blanking grid, and the remaining side panels are higher than the blanking grid; this scheme uses the inclined surface of the laser cutting machine to cooperate with the blanking grid and the feed guide assembly with highly protruding side panels, so that the steel pipe workpiece falling after laser cutting first rolls toward the blanking grid under the obstruction of the inclined surface, and then reduces the rolling speed under the action of the parallel blanking grid, thereby reducing the strength of the steel pipe when it collides with other components and reducing the noise caused by the collision. The parallel blanking grid and inclined surface use the inclined surface to make small-sized waste during laser cutting (such as flaky waste and cutting waste generated by cutting holes) fall along the inclined surface, while larger tubular waste (such as a section of waste at the end during end contour cutting) will roll to the blanking grid and fall in the blanking grid. At this time, the falling positions of the flaky waste and the tubular waste are different, so different containers can be used to collect them separately, realizing the fine and automatic separation of the waste.

[0024] The present invention also provides a steel pipe production system, comprising the aforementioned steel pipe cutting device for a motorcycle frame, and also comprising a bending machine, the bending machine being used to bend the steel pipe cut by the cutting device;

[0025] It also includes a discharge guide assembly, a discharge assembly and a pick-up manipulator. The discharge guide assembly includes a channel 1 and a channel 2 that are interconnected. The channel 1 is directly opposite to the discharge port. The channel 1 is of a larger upper portion and a smaller lower portion. The maximum width of the channel 1 is greater than the diameter of a steel pipe. The channel 2 only allows one steel pipe to pass through. The discharge assembly is located directly below the channel 2. The discharge assembly includes a conveyor belt and a partition fixed on the conveyor belt. The spacing between adjacent partitions is used to place a steel pipe.

[0026] The picking robot is used to take the steel pipe off the conveyor belt and place it on the bending machine for bending.

[0027] Beneficial effect: When this solution is adopted, the discharge guiding assembly, the discharge assembly and the picking-up robot are arranged between the cutting device and the bending machine, so that the workpieces cut by the laser cutting device pass through the blanking frame and are then arranged one by one by the discharge assembly, which makes it convenient for the picking-up robot to accurately pick up the workpieces and send them to the bending machine, thereby improving the degree of automation.

[0028] In addition, because the cutting efficiency of the laser cutting device is often higher than the bending efficiency of the bending machine, the material frame is used to temporarily store the steel pipes that cannot be bent in time; when both the laser cutting device and the bending machine are working, there is still feeding and discharging in the material frame, and the specific design of the seesaw ensures that the steel pipes in the material frame will not get stuck on the side close to the seesaw and the side close to the discharge port even if they move.

[0029] Preferably, as an improvement, the channel 1 of the discharge guide assembly has only one side parallel to the steel pipe as an inclined guide surface, and the inclined guide surface makes the channel 1 larger at the top and smaller at the bottom. The inclined guide surface is made of soft material, and the discharge guide assembly also includes a rotatably mounted cam, which can be pressed against the inclined guide surface.

[0030] Beneficial effect: Since the steel pipes have a certain length, it is easy for two or more steel pipes to be stuck in channel one and unable to fall during the unloading process. This solution uses a cam to push the soft inclined guide surface from bottom to top, so that the steel pipes on the inclined guide surface can move upward, thereby providing more space for the steel pipes close to channel two, ensuring that the steel pipes fall smoothly, and ensuring that the steel pipe production system using this solution will not have the problem of steel pipes getting stuck in the channel regardless of whether the material frame is feeding or unloading, or feeding and unloading are carried out simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention.

[0032] Figure 2 for Figure 1 The middle is a partially enlarged schematic diagram showing the relationship between the laser head, the space mobile module, and the traction component.

[0033] Figure 3 for Figure 1 A partial enlarged view of the .

[0034] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure after rotation angle.

[0035] Figure 5 for Figure 3 Left section diagram of .

[0036] Figure 6 for Figure 5 A partial schematic diagram (in this view, the bottom layer is full of steel pipes and is ready to be loaded with the second layer of steel pipes).

[0037] Figure 7 This is a three-dimensional schematic diagram showing the seesaw structure in Example 1.

[0038] Figure 8 This is a schematic diagram of the material frame in Example 1 when the material outlet is opened and the left steel pipe of the second layer falls down when the material frame is discharging materials.

[0039] Fig. 9 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention.

[0040] Fig.10 for Fig. 9 A partial enlarged view of the .

[0041] Fig.11 for Fig.10 Schematic diagram of the three-dimensional structure after rotation angle.

[0042] Fig.12 for Fig.10 Left section diagram of . DETAILED DESCRIPTION

[0043] The following is further described in detail through specific implementation methods:

[0044] The figure marks in the drawings of the specification include: laser cutting machine 1, chuck 11, support roller 12, spatial mobile module 13, support seat 14, driver 15, clamping block 16, rotating arm 17, inclined surface 18, blanking grid 2, material frame 3, inclined support plate 31, steel plate 32, seesaw 33, short counterweight 331, long counterweight 332, limiter 34, discharge port 35, baffle plate 36, movable roller 37 feed guide assembly 4, guide channel 41, blanking channel 42, single-sided guide channel 43, discharge guide assembly 5, channel one 51, channel two 52, cam 53, discharge assembly 6, conveyor belt 61, partition 61, bending machine 7, steel pipe 100.

[0045] Embodiment 1 is basically as shown in the attached Figures 1 to 8 shown.

[0046] Combination Figure 1 A cutting device for steel pipes for motorcycle frames includes a laser cutting machine 1, a blanking grid 2 and a material frame 3. The steel pipes cut by the laser cutting machine 1 pass through the blanking grid 2 and enter the feed guide assembly. The feed guide assembly guides the steel pipe workpieces cut to accurately fall into the material frame 3. The material frame 3 automatically arranges and discharges the steel pipes in an orderly manner. The specific structure is as follows:

[0047] 1. Laser cutting machine 1 and blanking grid 2

[0048] The laser cutting machine 1 adopts the laser cutting machine 1 in the prior art. The chuck 11 of the laser cutting machine 1 can clamp the steel pipe and drive the steel pipe to rotate at the same time. The feeding side and the laser cutting side of the processed steel pipe are located on both sides of the chuck 11, and the feeding side is supported by the support roller 12; on the laser cutting side, the laser head is installed on the space moving module 13, and the space moving module 13 drives the laser head to move up and down and / or move along the axial direction of the chuck 11. In this embodiment, the space moving module 13 includes a Z-axis module and a Y-axis module. The Z-axis module is used to drive the laser head to move up and down. The Z-axis module is installed at the output end of the Y-axis module, and the output end of the Y-axis module is also installed with The traction assembly includes a support seat 14, a driver 15 and symmetrically arranged clamping blocks 16. The support seat 14 is fixed to the output end of the Y-axis module. The driver 15 is fixed to the support seat 14. Each clamping block 16 is connected to a rotating arm 17. The driver 15 drives the rotating arm 17 to swing through a transmission assembly (the transmission assembly is not shown in the prior art figure). After the rotating arm 17 swings, it drives the corresponding clamping block 16 to stick to the steel pipe or move away from the steel pipe. After the clamping blocks 16 are close to each other and clamp the steel pipe, the chuck 11 releases the clamping of the steel pipe, and it can drive the steel pipe to move axially under the movement of the Y-axis module, so as to realize the traction before each steel pipe processing. After the traction is in place, the laser head is started to laser cut the steel pipe.

[0049] An inclined surface 18 is provided on the laser cutting machine 1. The inclined surface 18 is located in the falling direction of the steel pipe after being cut, that is, the inclined surface 18 is located directly below the laser head. The inclined surface 18 is inclined downward toward the blanking grid 2. The blanking grid 2 is horizontal. The blanking grid 2 includes a plurality of support tubes fixed on the side of the laser cutting machine 1 casing with a certain spacing. The blanking grid 2 is connected to the inclined surface 18.

[0050] The small-sized waste (such as flaky waste and cutting waste) generated by the laser cutting machine 1 slides along the inclined surface 18, while the tubular waste rolls along the inclined surface 18 to the position of the grid and falls from the gap in the grid, and the cut workpiece continues to move along the blanking grid 2 to the feed guide assembly, thereby realizing the separation of small-sized waste, tubular waste and cut workpieces, and corresponding collection containers are set at the falling positions of small-sized waste and tubular waste to facilitate collection; and during the separation process, the moving speed of the steel pipe is reduced by the horizontal blanking grid 2, which helps to reduce the collision noise caused by the falling process of the steel pipe.

[0051] 2. Feed guide assembly and material frame 3

[0052] The feed guide assembly includes front, rear, left and right side panels that are surrounded on all sides. The enclosed side panels make the feed guide assembly include a guide channel 41 and a blanking channel 42 that are interconnected. The guide channel 41 has a trumpet opening. The cross-section of the guide channel 41 is larger than the cross-section of the blanking channel 42. The width of the blanking channel 42 is 1-1.5 times the width of the steel pipe. The trumpet mouth is composed of the enclosed front, rear, left and right side panels. One of the side panels of the guide channel 41 is located directly below the end of the blanking grid 2, and the remaining side panels are higher than the blanking grid 2, so that the steel pipe can smoothly fall into the guide channel 41 and smoothly fall into the material frame 3 through the blanking channel 42.

[0053] The top of the material frame 3 is open, and a plurality of inclined support plates 31 distributed along the height of the material frame 3 are installed inside the material frame 3. The inclined support plates 31 are axially parallel to the chuck 11, and the front and rear ends of the inclined support plates 31 are inserted into the material frame 3. When the material frame 3 is used as a conventional stacking frame, the inclined support plates 31 can be directly pulled out of the material frame 3, thereby realizing two different usage methods of the material frame 3.

[0054] The spacing between adjacent inclined support plates 31 is slightly larger than the diameter of the steel pipe, so as to facilitate storing more steel pipes in the material frame 3 .

[0055] At least two mounting grooves distributed along the vertical height are provided on the side wall of the material frame 3, and a load-bearing steel plate 32 is fixed on the groove wall of each mounting groove. A plurality of seesaws 33 arranged along the height of the material frame 3 are rotatably connected to the steel plate 32. The seesaws 33 in the plurality of mounting grooves correspond to each other at corresponding heights, and the rotating shaft of the seesaw 33 is parallel to the axial direction of the chuck 11 (that is, parallel to the axial direction of the steel pipe).

[0056] The non-counterweight section of the seesaw 33 can extend into the material frame 3, and the counterweight section of the seesaw 33 is located outside the material frame 3. The counterweight makes the side of the seesaw 33 close to the empty space in the material frame 3 tend to be upward in a free state and hidden in the installation groove, thereby not affecting the falling of the steel pipe or the use of the material frame 3 as a conventional stacking frame.

[0057] The distance between the inclined upward end of the inclined support plate 31 and the seesaw 33 in a free state is greater than the diameter of a steel pipe. The bottom of the material frame 3 is in an inclined state. The inclination direction of the bottom of the material frame 3 is consistent with the inclination direction of the inclined support plate 31. The distance between adjacent seesaws 33 is equal to the distance between adjacent inclined support plates 31. After the lower seesaw 33 is pressed down by the steel pipe and rotated, the adjacent upper seesaw 33 can be pushed to rotate by the counterweight. After the lower inclined support plate 31 is filled with steel pipes, the adjacent upper seesaw 33 is in a state that enables the steel pipe to move along the non-counterweight end of the seesaw 33 to the corresponding inclined support plate 31.

[0058] The material dropping channel 42 is located just above the gap between the inclined support plate 31 and the seesaw 33; a limit piece 34 is fixed to the outer wall of the material frame 3, and the limit piece 34 is located below the lowest seesaw 33. The limit piece 34 and the side of the seesaw 33 with a counterweight are abutted against each other in a free state, so that the non-counterweight end of the lowest seesaw 33 is located in the middle of the gap between the inclined support plate 31 and the seesaw 33 in the initial state. The lowest seesaw 33 rotates to an inclined state after being subjected to the pressure of the steel pipe, and the inclination direction is consistent with the inclination direction of the bottom of the material frame 3.

[0059] A discharge port 35 is provided at the lowest end of the bottom position of the material frame 3, and a shielding plate 36 is provided on the discharge port 35. The shielding plate 36 is slidably connected to the bottom of the material frame 3 so that the discharge port 35 can be exposed or blocked by sliding. The distance between the inclined support plate 31 directly above the discharge port 35 and the adjacent wall of the material frame 3 is greater than the distance between one steel pipe, and specifically, the distance between the inclined support plate 31 and the adjacent wall of the material frame 3 can be 1.2-1.5 times the diameter of the steel pipe; so that the steel pipe can be finally discharged from the discharge port 35 after falling along the inclined support plate 31.

[0060] The width of the discharge port 35 is 2-3 times the diameter of the steel pipe, so that the steel pipe can more easily roll down to the inner wall of the material frame 3 under the tilt, while at the same time being able to avoid the problem of the vertically falling steel pipe and the inclined moving steel pipe below blocking the falling space during the falling process of the steel pipe with a relatively wide spacing, thereby ensuring that there will be no obstruction during discharge.

[0061] The counterweights on the seesaw 33 include a short counterweight 331 and a long counterweight 332. The short counterweight 331 can rotate between the rotation centers of the upper and lower seesaws 33. The short counterweight 331 is located in the mounting groove, and the long counterweight 332 is located outside the mounting groove. The short counterweight 331 and the long counterweight 332 are located on both sides of the seesaw 33, and the long counterweight 332 is installed at the ends of the seesaw 33. Under the free weight of the seesaw 33, the long counterweight 332 abuts against the outer edge of the mounting groove so that the non-counterweight end of the seesaw 33 can be located in the mounting groove. The short counterweight 331 and the long counterweight 332 can both be used to push the adjacent upper seesaw 33 to rotate (specifically, the short counterweight 331 of the lower seesaw 33 pushes the long counterweight 332 of the upper seesaw 33, the lower seesaw 33 contacts the long counterweight 332 of the upper seesaw 33, and the long counterweight 332 of the lower seesaw 33 contacts and pushes the upper seesaw 33 The long counterweight 332 makes the upper seesaw 33 rotate), the angle range of the seesaw 33 relative to the free state is greater than 90° and less than 140°. In this embodiment, the maximum rotation angle of the seesaw 33 relative to the free state can reach 129°±2°, so that after the steel pipe on the lower seesaw 33 is moved out, the upper seesaw 33 is rotated to a large enough angle under the pressure of the steel pipe to allow the upper steel pipe to move downward, so as to avoid the problem that the steel pipe on the seesaw 33 is stuck between the nearby inclined support plate 31 and the seesaw 33, and ensure that even if there is continuous discharge of steel pipes at the lower discharge port 35, the steel pipe feeding in the material frame 3 and the automatic neat arrangement of the steel pipes are not affected, so that the material frame 3 can be used as both a material receiving container and a material discharging container, and when the discharge and receiving rhythms are inconsistent, the steel pipes after laser cutting with higher efficiency can still be temporarily stored in the material frame 3.

[0062] The short counterweight 331 and the long counterweight 332 have the same cross-sectional dimensions to reduce manufacturing costs.

[0063] The feed guide assembly also includes a single-sided guide channel 43, the guide surface of the single-sided guide channel 43 faces the inside of the material frame 3, and the single-sided guide channel 43 makes the channel also trumpet-shaped. The single-sided guide channel 43 at the bottom of the drop channel 42 and the top guide channel 41 forms a situation in which the upper end cross-sectional size is the largest, the middle drop channel 42 cross-sectional size is the smallest, and the cross-sectional size of the single-sided guide channel 43 at the bottom opening is the second smallest, so as to ensure the accurate drop of the steel pipes, and automatically arrange the steel pipes neatly after the uppermost inclined support plate 31 has no corresponding seesaw 33, and it is not easy for the steel pipes to get stuck at the discharge end of the feed guide assembly.

[0064] The specific process of this embodiment is as follows:

[0065] The steel pipe workpiece cut by the laser cutting machine 1 enters the gap between the seesaw 33 and the inclined support plate 31 through the inclined surface 18—the blanking grid 2—the feed guide assembly, and falls in the gap. When the material frame 3 is empty, the steel pipe falls to the non-counterweight end of the lowest set of seesaws 33. Because the lowest seesaw 33 is initially in the middle of the gap between the inclined support plate 31 and the seesaw 33 under the action of the limiter 34, the steel pipe can be received when it falls on the lowest seesaw 33. At the same time, the steel pipe also presses the non-counterweight end of the seesaw 33 from the previous upward tilt to the tilted direction toward the bottom of the material frame 3, so that the steel pipe moves along the bottom of the material frame 3 to gradually fill the bottom of the material frame 3. When the bottom of the material frame 3 is not filled, after the steel pipe is removed from the lowest seesaw 33, the seesaw 33 returns to its original state under the counterweight to facilitate the falling of the next steel pipe.

[0066] After the bottom of the material frame 3 is full, the adjacent upper seesaw 33 is also rotated to a certain extent under the rotation trigger of the lower seesaw 33, so that the inclined support plate 31 of this layer is gradually filled in the same way after the steel pipe falls, and so on until all the inclined support plates 31 are filled with steel pipes. The whole process realizes the angle and orientation adjustment of the steel pipe through the feed guide assembly, so that it can move to the feeding position of the material frame 3 along the limited channel, and with the cooperation of the inclined support plate 31, the seesaw 33, and the limiter 34, the steel pipe is automatically sorted and arranged in the material frame 3. The whole process does not require human participation, and the part that requires manual arrangement is realized with a simple mechanical structure, which solves the current problem that the cut workpiece and waste cannot be separated after steel pipe cutting, and also solves the problem that the fallen steel pipes after cutting are easily piled up in the material frame 3, which requires special manual processing, resulting in increased labor costs and increased safety hazards.

[0067] When the blanking frame 3 is discharging materials, the shielding plate 36 is slid to one side of the discharge port 35, so that the discharge port 35 is completely exposed, and the steel pipes fall out of the discharge port 35. Because there is a distance between the inclined support plate 31 and the two side walls of the material frame 3, all steel pipes placed on any layer can be discharged from the discharge port 35.

[0068] A movable roller is arranged on the bottom surface of the material frame 3 to facilitate the transfer of the material frame 3 .

[0069] The cutting device for steel pipes for motorcycle frames of the first embodiment of the present invention can not only realize the rapid cutting of steel pipes, but also can automatically separate small-sized waste materials, tubular waste materials and steel pipe workpieces after cutting, and can automatically enter the material frame 3 along the feed guide assembly after the steel pipe workpieces are separated, and can realize the neat and automatic arrangement of steel pipes under the structure of the seesaw 33 and the inclined support plate 31 of the material frame 3, thus avoiding the chaotic stacking of steel pipes, saving labor costs, and avoiding the safety hazards caused by human participation in the arrangement of steel pipes.

[0070] In addition, the material frame 3 in the cutting device of this embodiment can be used as a material storage structure and can also cooperate with the bending machine 7 to achieve the function of transfer and collection.

[0071] Embodiment 2

[0072] Combination Figures 9 to 12 , the second embodiment provides a steel pipe production system, the first embodiment is a steel pipe cutting device for motorcycle frames, further comprising a discharge guide assembly 5, a discharge assembly 6, a pick-up manipulator and a bending machine 7, the bending machine 7 is used to bend the steel pipe cut by the cutting device. The steel pipes falling from the discharge port 35 of the material frame 3 of the cutting device enter the discharge assembly 6 under the guidance of the discharge guide assembly 5 and are arranged in sequence. The arranged steel pipes are picked up by the pick-up manipulator at a specific and same position and sent to the bending machine 7, where the bending machine 7 performs bending processing, wherein the pick-up manipulator can be a current robot or a truss manipulator, and the pick-up manipulator is a prior art, which is not described here and is not shown in the figure.

[0073] Specifically, the discharge guiding assembly 5 includes a channel 1 51 and a channel 2 52 which are interconnected. The channel 1 51 is opposite to the discharge port 35. The channel 1 51 is larger at the top and smaller at the bottom. The maximum width of the channel 1 51 is greater than the diameter of a steel pipe, and the channel 2 52 only allows one steel pipe to pass through. The channel 1 51 of the discharge guiding assembly 5 has only one side parallel to the steel pipe as an inclined guiding surface. The inclined guiding surface makes the channel 1 51 larger at the top and smaller at the bottom. The inclined guiding surface is made of soft material, such as rubber. The discharge guiding assembly 5 also includes a rotatably mounted cam 53. The cam 53 can be pressed onto the inclined guiding surface. When the cam 53 rotates, it pushes the steel pipe in the channel 1 51 upward.

[0074] The discharge assembly 6 is located directly below the channel two 52; the discharge assembly 6 includes a conveyor belt 61 and a partition 61 fixed on the conveyor belt 61. The spacing between adjacent partitions 61 is used to place a steel pipe. After the conveyor belt 61 sends away a steel pipe, the steel pipe can only fall onto the conveyor belt 61 again when the spacing between adjacent partitions 61 is aligned with the outlet end of the channel two 52 again, completing the single arrangement of the steel pipes on the discharge assembly 6, facilitating the subsequent material picking by the material picking robot, and improving the degree of automation.

[0075] In addition, because the cutting efficiency of the laser cutting device is often higher than the bending efficiency of the bending machine 7, the material frame 3 is used to temporarily store the steel pipes that cannot be bent in time; when the laser cutting device and the bending machine 7 are both working, there is still feeding and discharging in the material frame 3, and the specific design of the seesaw 33 ensures that even if the steel pipes in the material frame 3 move, they will not get stuck on the side close to the seesaw 33 and the side close to the discharge port 35.

[0076] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A cutting device for steel pipes for motorcycle frames, comprising a laser cutting machine, a blanking grid and a material frame, characterized in that: It also includes a feed guide assembly, which is provided with a guide channel and a blanking channel that are interconnected, the guide channel has a trumpet opening, the cross section of the guide channel is larger than the cross section of the blanking channel, and the width of the blanking channel is 1-1.5 times the width of the steel pipe; The material frame is equipped with multiple inclined support plates distributed along the height of the material frame, and the spacing between adjacent inclined support plates is greater than the diameter of the steel pipe. Multiple seesaws for receiving materials are installed on the side wall of the material frame. The seesaws are rotatably connected to the wall of the material frame, and the part of the seesaw facing the outside of the material frame is equipped with a counterweight. The counterweight makes the side of the seesaw close to the empty space in the material frame tend to be upward in a free state without affecting the falling of the steel pipe; The distance between the inclined upward end of the inclined support plate and the seesaw in a free state is greater than the diameter of a steel pipe, the bottom of the material frame is in an inclined state, the inclination direction of the bottom of the material frame is consistent with the inclination direction of the inclined support plate, the distance between adjacent seesaws is equal to the distance between adjacent inclined support plates, and the lower seesaw is pressed down by the steel pipe and rotated, and the adjacent upper seesaw can be pushed to rotate by the counterweight. After the lower inclined support plate is filled with steel pipes, the adjacent upper seesaw is in a state that enables the steel pipe to move along the non-counterweight end of the seesaw to the corresponding inclined support plate; The blanking channel is located just above the gap between the inclined support plate and the seesaw, and the steel pipe moves from the blanking grid into the guide channel; a limit piece is fixed on the material frame, and the limit piece is located below the lowest seesaw. The limit piece and the side of the seesaw with a counterweight are offset against each other in a free state, so that the non-counterweight end of the lowest seesaw is located in the middle of the gap between the inclined support plate and the seesaw in the initial state. The lowest seesaw rotates to an inclined state after being subjected to the pressure of the steel pipe, and the inclination direction is consistent with the inclination direction of the bottom of the material frame.

2. The cutting device for a steel pipe for a motorcycle frame according to claim 1, characterized in that: A discharge port is provided at the lowest end of the bottom of the material frame, and a shielding plate is provided on the discharge port. The shielding plate can expose or block the discharge port, and the distance between the inclined support plate directly above the discharge port and the adjacent material frame wall is greater than the distance between one steel pipe.

3. The cutting device for a steel pipe for a motorcycle frame according to claim 2, characterized in that: The width of the discharge port is 2-3 times the diameter of the steel pipe.

4. The cutting device for a steel pipe for a motorcycle frame according to claim 3, characterized in that: The counterweights on the seesaw include a short counterweight and a long counterweight. The short counterweight can be rotated between the rotation centers of the upper and lower seesaws. The long counterweight is located outside the material frame. The material frame is provided with a mounting groove for the seesaw. Under the free weight of the seesaw, the long counterweight is abutted against the outer edge of the mounting groove so that the non-counterweight end of the seesaw can be located in the mounting groove. Both the short counterweight and the long counterweight can be used to push the adjacent upper seesaw to rotate. The angle range in which the seesaw can rotate relative to the free state is greater than 90° and less than 140°, so that after the steel pipe on the lower seesaw is moved out, the upper seesaw can rotate to a sufficiently large angle under the pressure of the steel pipe to allow the upper steel pipe to move downward.

5. The cutting device for a steel pipe for a motorcycle frame according to claim 4, characterized in that: The short counterweight and the long counterweight have the same cross-sectional dimensions.

6. The cutting device for a steel pipe for a motorcycle frame according to claim 1, characterized in that: The feed guide assembly also includes a single-sided guide channel, the guide surface of the single-sided guide channel faces the inside of the material frame, the blanking channel and the single-sided guide channel at the bottom of the top guide channel form a situation where the uppermost is the largest and the middle is the smallest, and the lower opening size is the second largest.

7. The cutting device for a steel pipe for a motorcycle frame according to claim 1, characterized in that: The chuck of the laser cutting machine can rotate, and the laser head of the laser cutting machine is installed on a spatial moving module. The spatial moving module drives the laser head to move up and down and / or move axially along the chuck. A traction assembly is also installed on the spatial moving module. The spatial moving module drives the traction assembly to move axially along the chuck. The traction assembly includes a driver and symmetrical clamping blocks. The driver drives the two clamping blocks to move closer or farther away from each other to achieve clamping and releasing of the steel pipe.

8. A cutting device for a steel pipe for a motorcycle frame according to any one of claims 1 to 7, characterized in that: The laser cutting machine is provided with an inclined surface, which is located in the falling direction of the steel pipe after being cut, and the inclined surface is inclined downward toward the material frame, the blanking grid is horizontal, and the blanking grid is connected to the inclined surface. The bell mouth of the feed guide assembly is composed of enclosed front, rear, left and right side panels, one of which is located directly below the end of the blanking grid, and the remaining side panels are higher than the blanking grid.

9. A steel pipe production system, characterized in that: A cutting device for a steel pipe for a motorcycle frame comprising any one of claims 4 to 5, and further comprising a bending machine, the bending machine being used to bend the steel pipe cut by the cutting device; It also includes a discharge guide assembly, a discharge assembly and a pick-up manipulator. The discharge guide assembly includes a channel 1 and a channel 2 that are interconnected. The channel 1 is directly opposite to the discharge port. The channel 1 is of a larger upper portion and a smaller lower portion. The maximum width of the channel 1 is greater than the diameter of a steel pipe. The channel 2 only allows one steel pipe to pass through. The discharge assembly is located directly below the channel 2. The discharge assembly includes a conveyor belt and a partition fixed on the conveyor belt. The spacing between adjacent partitions is used to place a steel pipe. The picking robot is used to take the steel pipe off the conveyor belt and place it on the bending machine for bending.

10. A steel pipe production system according to claim 9, characterized in that: The channel 1 of the discharge guide assembly has only one side parallel to the steel pipe as an inclined guide surface, which makes the channel 1 larger at the top and smaller at the bottom. The inclined guide surface is made of soft material. The discharge guide assembly also includes a rotatably mounted cam that can be pressed against the inclined guide surface.

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