Automatic conveying method for numerical control machining bars

Abstract

The invention discloses an automatic conveying method for numerical control machining bars. The automatic conveying method comprises the following steps that the bars sequentially pass through an automatic conveyor, a storage device, a lifting feeding mechanism, a guide device and a sorting device to be conveyed. According to the bar conveying device, the axis position of a bar is not prone to change through material arrangement of the material arrangement device, the bar can be conveyed more reliably, the material arrangement device comprises a rotating shaft, a baffle arranged on the rotating shaft and a torsional spring arranged between the material guide device and the rotating shaft, and the rotating shaft is rotationally installed on the material guide device; the baffle extends downwards from the rotating shaft in the radial direction of the rotating shaft.

Description

Technical Field

[0001] The invention relates to the field of numerical control machining, in particular to an automatic conveying method for numerical control machining bars. Background Art

[0002] CNC machining is currently a relatively high-precision machining method. CNC machining mainly processes workpieces through CNC machine tools, which include CNC lathes, CNC milling machines, CNC machining centers, and so on.

[0003] Traditional CNC machining mostly uses manual loading and unloading when installing and disassembling workpieces. This method has low efficiency in installing and disassembling workpieces on the one hand, and low installation precision on the other hand. Therefore, the use of automated manipulators to install and disassemble workpieces began to appear later. For example, in the patent document with Chinese patent application number 202022397997.2, application date October 26, 2020, and authorization announcement date May 28, 2021, an automatic loading device for CNC lathes is disclosed, which belongs to the field of automatic loading technology. The automatic loading device for CNC lathes includes a frame body, a top material assembly and a clamping assembly. The clamping assembly includes a lifting bracket, a guide rail, a sliding seat, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder and a manipulator. Open the second, third and fourth hydraulic cylinders to move the manipulator to the top of the support block, open the manipulator to clamp the shaft blank, and clamp it to the clamping area of ​​the CNC lathe. Another manipulator clamps the previously processed finished shaft to the finished product placement area. The automated material ejection design allows for convenient stacking of shaft blanks. The automated clamping design allows for convenient loading of shaft blanks and unloading of multiple finished shaft parts without manual intervention, which greatly improves the processing efficiency of the CNC lathe and increases the clamping and processing accuracy of the CNC lathe. The ejection assembly includes an ejection bracket, a support block, a feed box, an ejection plate and a first hydraulic cylinder. The bottom of the ejection bracket is vertically fixed to one side of the top of the frame body. The support block is symmetrically arranged on the outer side of the upper end of the ejection bracket. The feed box is tilted upward and arranged on the side of the side wall of the ejection bracket away from the support block. The ejection plate slides vertically between the ejection brackets. The cylinder body of the first hydraulic cylinder is vertically arranged on the outer side of the ejection bracket below the feed box. The bottom of the ejection plate is fixed to the outer side of the piston rod of the first hydraulic cylinder. During operation, under the action of the first hydraulic cylinder, the ejection plate lifts the shaft blank between the feed box and the support plate, rolls over the upper end of the support plate into the V-shaped groove of the support block, and then clamps the shaft blank into the CNC lathe through the clamping assembly.

[0004] Although the above-mentioned automatic loading device for CNC lathes can realize the loading and unloading of shaft workpieces, when the ejector plate lifts the shaft blank over the support plate, due to its own weight and the effect of the support plate, the axis of the shaft blank may deviate from the original axis direction during the process of entering the V-groove, making it difficult for the shaft blank to enter the V-groove, and the clamping assembly is difficult to clamp the shaft blank. Summary of the invention

[0005] The purpose of the present invention is to provide a method for automatically conveying numerically controlled processed bars. By using the present invention, the bars can be conveyed reliably.

[0006] To achieve the above object, a method for automatically conveying CNC machined bars comprises the following steps: S1 The bars are conveyed to a storage device through an automatic conveyor, and the bottom surface of the storage device is tilted downward from the input end to the output end; the bars are arranged in sequence from the output end to the input end of the bottom surface of the storage device in the storage device under the action of the bars' own gravity.

[0007] S2 lifts the bars in the storage device into the material guiding device one by one through the lifting and feeding mechanism, and the bottom surface of the material guiding device is tilted downward from the input end to the output end.

[0008] S3 At the output end of the material guide device, the material is transported to the positioning device after being sorted by the sorting device; the sorting device includes a rotating shaft, a baffle arranged on the rotating shaft, and a torsion spring arranged between the material guide device and the rotating shaft, the rotating shaft is rotatably mounted on the material guide device, and the baffle extends downward from the rotating shaft along the radial direction of the rotating shaft; specifically includes: S31 When the first bar rolls along the bottom surface of the material guide device to the baffle, the baffle blocks the first bar under the action of the torsion spring. When the second bar is lifted and blocked by the first bar, under the action of the first bar and the second bar, the baffle overcomes the torsion force of the torsion spring and opens, allowing the first bar to fall into the positioning device.

[0009] S32 After the first bar falls, the baffle is reset under the action of the torsion spring.

[0010] S33 Repeat the above S31 and S32 to achieve the position arrangement and continuous transportation of the bars.

[0011] The gravity of the bar is set to G, and the angle between the bottom surface of the guide device and the horizontal plane is set to , then the load N of each rod acting on the baffle is G×sin , set the baffle swing After the angle is adjusted, the bar can fall from the guide device into the positioning device. is a positive integer, and the load acting on the baffle is set to M, which can make the baffle open. Angle, where 1.5N≤M≤2N, according to K=(E*d 4 ) / (1167*D m *P*N*R) to determine the wire diameter d of the torsion spring, where: K represents the load (kgf / mm) for each additional 1° torsion angle when the torsion spring is twisted. , d is the wire diameter of the torsion spring, D m is the median diameter of the torsion spring, N is the total number of coils of the torsion spring, R is the force arm of the load, p=3.1416, D m , N and R are all set values.

[0012] In the above method, since the bottom surface of the storage device is tilted downward from the input end to the output end, the bar material can reliably enter the output end of the storage device after entering the storage device. Since a lifting and feeding mechanism is provided, when the lifting and feeding mechanism does not convey the bar material to the material guide device, the bar material in the storage device can be prevented from directly entering the material guide device, and the lifting and feeding mechanism and the material guide device cooperate to block the bar material in the storage device, thereby preventing the bar material in the storage device from slipping. In the present invention, since a material-forming device is provided, when the rods enter the material-forming device through the material-guiding device, due to the setting of the torsion spring, the first rod will not push open the baffle, and the axis of the rod will be kept being transported through the baffle. When the second rod contacts the first rod, it can overcome the elastic force of the torsion spring to push open the baffle, allowing the first rod to be transported, and then the baffle is reset under the action of the torsion spring to resist the next rod and organize and position it, and so on, so that the rods that come in successively can be reliably transported, and the transportation of the rods is reliable and accurate. In addition, the setting of the torsion spring can prevent the first rod from pushing open the baffle, and when the second rod enters, it can push open the rod and allow the first rod to be transported.

[0013] Furthermore, the automatic conveyor includes a supporting foot group, side baffles, conveying rollers and a conveying drive; the supporting foot group includes supporting feet, adjusting feet, diagonal braces and a connecting seat; each supporting foot group is provided with two supporting feet that are parallel to each other and extend vertically, an adjusting foot is threadedly connected to the lower end of the supporting foot, two diagonal braces are connected between the two supporting feet, and a connecting seat is connected to the upper end of the supporting foot by bolts.

[0014] Furthermore, the connection seat includes a side connection plate and a vertical connection plate bent from both sides of the side connection plate to the same outer side, a notch is formed at the inner lower end of the side connection plate and the vertical connection plate, an oblique angle is formed at the outer side of the upper end of the vertical connection plate, and a receiving groove is formed between the side connection plate and the vertical connection plate; the upper end of the support foot extends into the receiving groove, and the support foot is connected to the vertical connection plate by bolts. When the support foot group is installed on the side baffle, the inner side surface of the side connection plate contacts the side baffle. Due to the provision of the notch, the distance a between the two side connection plates of the same support foot group is smaller than the distance b between the vertical side surfaces of the notch, and the inner side surface of the support foot is located outside the vertical side surface of the notch, so that it is convenient to install the support foot group, and at the same time the distance between the support feet is increased, thereby improving the stability of the support.

[0015] Furthermore, the material storage device includes a material storage frame and a material storage rack, the material storage rack includes a material storage bottom plate and a material storage side plate, the material storage side plates are respectively arranged on both sides of the material storage bottom plate, the material storage bottom plate is arranged on the material conveying frame, and the material storage bottom plate is arranged to be tilted downward from the input end to the output end. The material storage device has a simple structure and low cost.

[0016] Furthermore, a material storage adjustment plate parallel to the material storage side plate is provided in the material storage rack, a material storage adjustment screw is provided on the material storage adjustment plate, a material storage adjustment nut engaged with the material storage adjustment screw is rotatably installed on one of the material storage side plates, and the material storage adjustment nut is rotated to adjust the position of the material storage adjustment plate. By providing the material storage adjustment plate, the material storage space can be adjusted according to the rods of different sizes and lengths to be suitable for storing rods of different models. And by combining the material storage adjustment screw and the material storage adjustment nut, the structure is simple.

[0017] Further, the lifting and feeding mechanism includes a lifting and feeding base, a guide seat, a guide rail, a lifting guide plate, a lifting plate and a lifting drive; guide seats are respectively arranged on both sides of the lifting and feeding base, and guide rails are respectively arranged on both sides of the lifting plate, the guide rails are slidably arranged on the guide seats, the lifting guide plate is arranged on the lifting and feeding base, the lifting plate and the lifting guide plate are slidably fitted, the upper end of the lifting plate forms an inclined surface downward from the input end to the output end, and the lifting drive is arranged between the lifting and feeding base and the lifting plate; the specific steps of S2 are: S21 The lifting plate moves downward under the action of the lifting drive, so that the input end of the lifting plate is flush with the bottom surface of the storage device, and the bars of the storage device enter the upper end of the lifting plate and are blocked by the lifting guide plate.

[0018] S22 drives the lifting plate to rise through the lifting drive, uses the upper end of the lifting plate and the lifting guide plate to limit the rod, and drives the rod to rise to the input end of the material guide device through the lifting plate.

[0019] S23 Repeat S21 and S22 to lift and transport the next bar.

[0020] In the above structure and method, since an inclined surface is formed at the upper end of the lifting plate, a receiving groove is formed between the upper end of the lifting plate and the side surface of the material guiding device. When the rod enters the receiving groove, the rod can be reliably transported upward through the lifting plate and when the output end of the inclined surface is equal to or higher than the guide device, the rod can naturally enter the material guiding device.

[0021] Furthermore, the material guide device includes a material guide base, a material guide frame and a material guide adjustment plate. The material guide base is arranged on the lifting and feeding mechanism. The material guide frame includes a material guide bottom plate and a material guide side plate. The material guide side plates are arranged on both sides of the material guide bottom plate. A material guide adjustment plate is arranged in the material guide frame. A material guide adjustment screw is arranged on the material guide adjustment plate. A material guide adjustment nut is rotatably arranged on one of the material guide side plates. The material guide adjustment screw is meshed with the material guide adjustment nut. The input end of the material guide adjustment plate is tilted outward. Since the material guide adjustment plate is arranged, it can be suitable for conveying rods of different lengths. Since the input end of the material guide adjustment plate is tilted outward, it can guide the plate entering the material guide device, so that the rod can reliably enter the material guide device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the automatic conveying system for CNC machining bars.

[0023] Figure 2 This is a stereoscopic image from another perspective of the automatic conveying system for CNC machining bars.

[0024] Figure 3 This is a three-dimensional diagram of an automatic conveyor.

[0025] Figure 4 This is a stereoscopic image from another perspective of the automatic conveyor.

[0026] Figure 5 This is an exploded view of the automatic conveyor.

[0027] Figure 6 A three-dimensional diagram of the connecting seat.

[0028] Figure 7 This is the front view of the connector.

[0029] Figure 8 A schematic diagram of the support leg assembly.

[0030] Fig. 9 for Figure 5 A is an enlarged view of the middle image.

[0031] Fig.10 It is a three-dimensional diagram of the storage device.

[0032] Fig.11 This is a three-dimensional image of the storage device from another perspective.

[0033] Fig.12 It is a three-dimensional diagram of the side frame, lifting and feeding mechanism, material guiding device, material sorting device, positioning device and blanking device.

[0034] Fig.13 It is a stereoscopic diagram from another perspective of the side frame, lifting and feeding mechanism, material guiding device, material sorting device, positioning device and blanking device.

[0035] Fig.14 It is a schematic diagram of the side frame and the lifting and feeding mechanism without the lifting guide plate.

[0036] Fig.15 This is an exploded view of the side frame, lifting and feeding mechanism, and does not include the lifting guide plate.

[0037] Fig.16 It is a schematic diagram of the material guiding device, the material organizing device and the positioning device.

[0038] Fig.17 It is a schematic diagram of the forces acting on the positioning device and the rod. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] The automatic conveying method of CNC machining bars is realized by the automatic conveying system of CNC machining bars. Figure 1 and Figure 2 As shown, the automatic conveying system for CNC machining bars includes an automatic conveyor 1, a material storage device 2, a lifting and feeding mechanism 3, a material guiding device 4, a material sorting device 5, a positioning device 6 and a material dropping device 9.

[0041] like Figures 3 to 5 As shown, the automatic conveyor 1 includes a support foot group 11, a side baffle 12, a conveying roller 13 and a conveying drive. The support foot group 11 includes a support foot 111, an adjustment foot 112, an inclined brace 113 and a connecting seat 114; each support foot group 11 is provided with two support feet 111 that are parallel to each other and extend vertically, and the adjusting foot 112 is threadedly connected to the lower end of the support foot 111. By providing the adjusting foot 112, it is convenient to adjust the height of the support foot 111. Two inclined braces 113 are connected between the two support feet 111, and the two inclined braces 113 are X-shaped. The upper end of the support foot 111 is connected to the connecting seat 114 by bolts. As shown Figure 6 and Figure 7As shown, the connection seat 114 includes a side connection plate 1141 and a vertical connection plate 1142 bent from both sides of the side connection plate 1141 to the same outer side, a notch 1143 is formed at the inner lower end of the side connection plate 1141 and the vertical connection plate 1142, and an angle 1145 is formed at the outer side of the upper end of the vertical connection plate 1142 to reduce the interference between the outer side of the upper end of the connection seat 114 and other parts, and a receiving groove 1144 is formed between the side connection plate 1141 and the vertical connection plate 1142. The upper end of the support foot 113 extends into the receiving groove 1144, and the support foot 113 is connected to the vertical connection plate 1142 by bolts. Therefore, the upper end of the support foot 113 can be well limited by using the side connection plate 1141 and the vertical connection plate 1142. Figure 8 As shown, when the support foot group 11 is installed on the side baffle 12, the inner side surface of the side connecting plate 1141 contacts the side baffle 12. Since the cutout 1143 is provided, the distance a between the two side connecting plates of the same support foot group is smaller than the distance b between the vertical sides of the cutout 1143, and the inner side surface of the support foot is located outside the vertical side surface of the cutout. Therefore, it is convenient to install the support foot group, and at the same time the distance between the support feet is increased, thereby improving the stability of the support.

[0042] The side baffles 12 are mounted on the connecting seat 114. A plurality of horizontally arranged conveying rollers 13 are mounted between the side baffles 12 via bearings. Fig. 9 As shown, at least one sprocket 131 is provided at one end of the conveying roller 13 .

[0043] The conveying drive includes a servo motor (not shown in the figure), a conveying drive shaft 141 and a conveying drive sprocket 142. The conveying drive shaft 141 is installed between the baffles 12 on both sides, and the conveying drive sprocket 142 is installed on the conveying drive shaft 141. The servo motor drives the conveying drive shaft 141 to rotate. A chain is arranged between the conveying drive sprocket 142 and the sprocket 131. When the servo motor is working, the conveying roller 13 can be driven to rotate through the conveying drive sprocket 142, the sprocket 131 and the chain, thereby conveying the bars on the automatic conveyor.

[0044] like Figure 1 As shown, a side frame 70 is installed on one side of the output end of the automatic conveyor.

[0045] like Fig.10 and Fig.11As shown, the storage device 2 includes a storage rack 21 and a storage rack 22. The storage rack 21 is installed on the side frame 70. The storage rack 22 includes a storage bottom plate 221 and a storage side plate 222. The storage side plates 222 are respectively arranged on both sides of the storage bottom plate 221. The storage bottom plate 221 is arranged on the feeding rack 21. The storage bottom plate 221 is arranged downwardly inclined from the input end to the output end. A storage guide plate 223 that bends downward and extends is arranged at the output end of the storage bottom plate 221. A storage adjustment plate 23 parallel to the storage side plate 222 is arranged in the storage rack 22. A storage adjustment screw 24 is arranged on the storage adjustment plate 23. A storage adjustment nut 25 that meshes with the storage adjustment screw is rotatably installed on one of the storage side plates. The storage adjustment nut 25 is rotated to adjust the position of the storage adjustment plate 23 to be suitable for storing bars of different lengths.

[0046] like Figures 12 to 15 As shown, the lifting and feeding mechanism 3 includes a lifting and feeding base 31, a guide seat 32, a guide rail 33, a lifting guide plate 34, a lifting plate 35 and a lifting drive 36; the lifting and feeding base 31 is installed on the side frame 70, and the lifting and feeding base 31 is provided with an avoidance hole 311, and the avoidance hole 311 provides an avoidance space for the lifting and lowering of the lifting plate 35, and the guide seats 32 are respectively arranged on both sides of the lifting and feeding base 31, and the guide blocks 321 are installed on the inner sides of the guide seats 32, and the guide rails 33 are slidably arranged on the guide blocks 321, and the guide rails 33 are respectively arranged on both sides of the lifting plate 35, and the lifting guide plate 34 is arranged on the lifting and feeding base 31 through the connecting device 37, and the lifting plate 35 is slidably fitted with the lifting guide plate 34, and the upper end 351 of the lifting plate 35 forms an inclined surface downward from the input end to the output end, and the lifting drive 36 is a lifting hydraulic cylinder, and the cylinder body of the lifting hydraulic cylinder is installed on the CNC lathe, and the piston rod of the neural hydraulic cylinder is connected to the lifting plate 35 through the connecting block 38. When the lifting hydraulic cylinder is working, the lifting hydraulic cylinder drives the lifting plate 35 to move up and down through the connecting block 38. When the lifting plate 35 moves up and down, the guide rail 33 slides on the guide block 321 to achieve position guidance.

[0047] When the upper end 351 of the lifting plate 35 forms an inclined surface downward from the input end to the output end, the bar 30 can be limited in position under the action of the inclined surface of the lifting plate 35 and the lifting guide plate 34 to prevent the bar 30 from falling off the lifting plate 35.

[0048] like Fig.12 , Fig.13 and Fig.16 As shown, the material guide device 4 includes a material guide base 41, a material guide frame 42 and a material guide adjustment plate 43. The material guide base 41 is arranged on the lifting guide plate 34. The material guide frame 42 includes a material guide bottom plate 421 and a material guide side plate 422. The material guide side plates 422 are respectively arranged on both sides of the material guide bottom plate 421. A material guide adjustment plate 43 is arranged in the material guide frame 42. A material guide adjustment screw 44 is arranged on the material guide adjustment plate 43. A material guide adjustment nut 45 is rotatably arranged on one of the material guide side plates. The material guide adjustment screw 44 is meshed with the material guide adjustment nut 45. The input end 431 of the material guide adjustment plate is tilted outward. When the material guide adjustment nut 45 is rotated, the material guide adjustment screw can move axially, so that the material guide adjustment plate 43 can be moved, so that it is suitable for bars of different lengths. Since the input end of the material guide adjustment plate 43 is tilted outward, the plate entering the material guide device can be guided, so that the bar can reliably enter the material guide device.

[0049] like Fig.12 , Fig.13 and Fig.16 As shown, the material-forming device 5 comprises a rotating shaft 51, a baffle 52 arranged on the rotating shaft 51, and a torsion spring (not shown in the figure) arranged between the material-guiding side plate 422 and / or the material-guiding adjustment plate 43 and the rotating shaft. The rotating shaft 51 is rotatably mounted on the material-guiding device, and the baffle 52 extends downward from the rotating shaft along the radial direction of the rotating shaft. In this embodiment, a material-forming device is arranged on a material-guiding side plate, and a material-forming device is arranged on the material-guiding adjustment plate. The two material-forming devices are on the same plane and jointly tidy up the bar materials.

[0050] In the present invention, if Fig.17 As shown, the gravity of the rod 100 is set to G, and the angle between the upper bottom surface of the guide bottom plate 421 and the horizontal plane is set to , then the load N of each rod acting on the baffle 52 is N=G×sin , set the baffle swing After the angle is adjusted, the bar can fall from the guide device into the positioning device. is a positive integer, and the load acting on the baffle is set to M, which can make the baffle open. Angle, where 1.5N≤M≤2N, according to K=(E*d 4 ) / (1167*D m *P*N*R) to determine the wire diameter d of the torsion spring, where: K represents the load (kgf / mm) for each additional 1° torsion angle when the torsion spring is twisted. ; d is the wire diameter of the torsion spring, D m is the median diameter of the torsion spring, N is the total number of coils of the torsion spring, R is the force arm of the load, p=3.1416, D m , N and R are all set values. In this embodiment, the wire diameter of the torsion spring of each material-forming device 5 is d1=d / 2. Since the range selected by M is 1.5N≤M≤2N, and the resistance to the rotation of the baffle and the shaft is small, this range can meet the requirements of the present invention.

[0051] like Fig.12 , Fig.13 and Fig.16 As shown, the positioning device 6 includes a positioning base 61 , a V-shaped block 62 , an end surface positioning plate 63 , a positioning drive seat 64 , a positioning drive 65 and a positioning drive rod 66 . The positioning base 61 is installed on the material guide base 41. More than two V-blocks 62 are arranged on the positioning base 61. Multiple V-blocks 62 are arranged side by side, and there is a gap between adjacent F-blocks 62. The end face positioning plate 63 is arranged on the positioning base 61 and is located at one end of the positioning base. The end face positioning plate 63 is arranged close to the CNC lathe. The end face positioning plate 63 is located on the side of the V-block close to the CNC lathe. The positioning drive seat 64 is arranged on the positioning base 61 and is located at the other end of the positioning base. The V-block 62 is located between the end face positioning plate 63 and the positioning drive seat 64. The positioning drive 65 is a positioning cylinder. The positioning drive 65 is arranged on the positioning drive seat 64, and the positioning drive rod 66 is arranged on the output shaft of the positioning drive; the rod falls from the guide device onto the V-block, and then the positioning drive drives the axis of the positioning drive rod to move, so that one end face of the rod is against the end face positioning plate.

[0052] like Figure 1 , Fig.12 and Fig.13As shown, the blanking device 9 includes a blanking frame 91, a blanking trough 92, a collection frame 93 and a conveyor belt device 94. The blanking frame 91 is arranged on the side frame, the blanking trough 92 is installed on the blanking frame 91, the collection frame 93 is located at the output end of the blanking trough 92, and a conveyor belt device 94 is arranged on one side of the side frame. The conveyor belt device 94 is used to transport the collection frame 92 out, and the conveyor belt device 94 is a prior art.

[0053] The automatic conveying method of CNC machining bars comprises the following steps: S1 The bars are conveyed to the storage device 2 by the automatic conveyor 1; the bars are arranged in sequence from the output end to the input end of the bottom surface of the storage device 2 under the action of the bars' own gravity.

[0054] S2: The bars in the storage device 2 are lifted one by one into the material guiding device 4 through the lifting and feeding mechanism 3. The bottom surface of the material guiding device 4 is tilted downward from the input end to the output end. The specific steps are as follows.

[0055] S21 The lifting plate moves downward under the action of the lifting drive, so that the input end of the lifting plate is flush with the bottom surface of the storage device, and the bars of the storage device enter the upper end of the lifting plate and are blocked by the lifting guide plate.

[0056] S22 drives the lifting plate to rise through the lifting drive, uses the upper end of the lifting plate and the lifting guide plate to limit the rod, and drives the rod to rise to the input end of the material guide device through the lifting plate.

[0057] S23 Repeat S21 and S22 to lift and transport the next bar.

[0058] S3 The material is transported to the positioning device after being tidied by the tidier at the output end of the material guiding device; specifically includes: S31 When the first bar rolls along the bottom surface of the material guide device to the baffle, the baffle blocks the first bar under the action of the torsion spring. When the second bar is lifted and blocked by the first bar, under the action of the first bar and the second bar, the baffle overcomes the torsion force of the torsion spring and opens, allowing the first bar to fall into the positioning device.

[0059] S32 After the first bar falls, the baffle is reset under the action of the torsion spring.

[0060] S33 Repeat the above S31 and S32 to achieve the position arrangement and continuous transportation of the bars.

[0061] S4 Positions the bar in the positioning device.

[0062] S5 uses a robot to clamp the rod in the positioning device to the CNC lathe; the rod is clamped by the chuck and tailstock of the CNC lathe.

[0063] S6 uses CNC lathe to CNC machine the rods to form workpieces.

[0064] S9 uses a robot to clamp the workpiece to the blanking chute, and then lets the workpiece fall into the collection frame through the blanking chute.

[0065] In the above method, since the bottom surface of the storage device is tilted downward from the input end to the output end, the bar material can reliably enter the output end of the storage device after entering the storage device. Since a lifting and feeding mechanism is provided, when the lifting and feeding mechanism does not convey the bar material to the material guide device, the bar material in the storage device can be prevented from directly entering the material guide device, and the lifting and feeding mechanism and the material guide device cooperate to block the bar material in the storage device, thereby preventing the bar material in the storage device from slipping. In the present invention, since a material sorting device is provided, when the rods enter the material sorting device through the material guiding device, due to the provision of the torsion spring, the first rod will not push open the baffle, and the baffle allows the axis of the rod to maintain the direction of feeding into the positioning device, so that the rod can fall into the positioning device reliably. When the second rod contacts the first rod, it can overcome the elastic force of the torsion spring to push open the baffle, allowing the first rod to fall into the positioning device, and then the baffle is reset under the action of the torsion spring to resist the next rod and sort and position it, and so on, so that the rods that come in successively can fall into the positioning device reliably, and the transportation of the rods is reliable and accurate.

Claims

1. A method for automatically conveying CNC machined bars, characterized in that The steps include: S1 The bars are conveyed to a storage device by an automatic conveyor, and the bottom surface of the storage device is tilted downward from the input end to the output end; the bars are arranged in sequence from the output end to the input end of the bottom surface of the storage device in the storage device under the action of the bars' own gravity; S2 lifts the bars in the storage device into the guide device one by one through the lifting and feeding mechanism, and the bottom surface of the guide device is tilted downward from the input end to the output end; S3 At the output end of the material guide device, the material is transported to the positioning device after being sorted by the sorting device; the sorting device includes a rotating shaft, a baffle arranged on the rotating shaft, and a torsion spring arranged between the material guide device and the rotating shaft, the rotating shaft is rotatably mounted on the material guide device, and the baffle extends downward from the rotating shaft along the radial direction of the rotating shaft; specifically includes: S31 When the first bar rolls along the bottom surface of the material guide device to the baffle, the baffle blocks the first bar under the action of the torsion spring. When the second bar is lifted and blocked by the first bar, under the action of the first bar and the second bar, the baffle overcomes the torsion of the torsion spring and opens, allowing the first bar to fall into the positioning device; S32 After the first bar falls, the baffle is reset under the action of the torsion spring; S33 repeats the above S31 and S32 to achieve the position arrangement and continuous transportation of the bars; The gravity of the bar is set to G, and the angle between the bottom surface of the guide device and the horizontal plane is set to , then the load N of each rod acting on the baffle is G×sin , set the baffle swing After the angle is adjusted, the bar can fall from the guide device into the positioning device. is a positive integer, and the load acting on the baffle is set to M, which can make the baffle open. Angle, where 1.5N≤M≤2N, according to K=(E*d 4 ) / (1167*D m *P*N*R) to determine the wire diameter d of the torsion spring, where: K represents the load (kgf / mm) for each additional 1° torsion angle when the torsion spring is twisted. , d is the wire diameter of the torsion spring, D m is the median diameter of the torsion spring, N is the total number of coils of the torsion spring, R is the force arm of the load, p=3.1416, D m , N and R are all set values.

2. The automatic conveying method for CNC machining bars according to claim 1 is characterized in that: The automatic conveyor includes a supporting foot group, a side baffle, a conveying roller and a conveying drive; the supporting foot group includes a supporting foot, an adjusting foot, an oblique brace and a connecting seat; each supporting foot group is provided with two supporting feet that are parallel to each other and extend vertically, an adjusting foot is threadedly connected to the lower end of the supporting foot, two oblique braces are connected between the two supporting feet, and a connecting seat is connected to the upper end of the supporting foot by bolts.

3. The automatic conveying method for CNC machining bars according to claim 2 is characterized in that: The connecting seat includes a side connecting plate and a vertical connecting plate bent toward the same outer side from both sides of the side connecting plate, a notch is formed at the inner lower end of the side connecting plate and the vertical connecting plate, an oblique angle is formed at the outer side of the upper end of the vertical connecting plate, and a receiving groove is formed between the side connecting plate and the vertical connecting plate; the upper end of the supporting foot extends into the receiving groove, and the supporting foot is connected to the vertical connecting plate by bolts.

4. The automatic conveying method for CNC machining bars according to claim 1 is characterized in that: The material storage device includes a material storage frame and a material storage rack. The material storage rack includes a material storage bottom plate and material storage sides. Material storage side plates are respectively arranged on both sides of the material storage bottom plate. The material storage bottom plate is arranged on the feeder frame. The material storage bottom plate is arranged to be tilted downward from the input end to the output end.

5. The automatic conveying method for CNC machining bars according to claim 4 is characterized in that: A material storage adjusting plate parallel to the material storage side plate is arranged in the material storage rack, a material storage adjusting screw is arranged on the material storage adjusting plate, a material storage adjusting nut meshing with the material storage adjusting screw is rotatably installed on one of the material storage side plates, and the position of the material storage adjusting plate is adjusted by rotating the material storage adjusting nut.

6. The automatic conveying method for CNC machining bars according to claim 1, characterized in that: The lifting and feeding mechanism includes a lifting and feeding base, a guide base, a guide rail, a lifting guide plate, a lifting plate and a lifting drive; guide bases are respectively arranged on both sides of the lifting and feeding base, and guide rails are respectively arranged on both sides of the lifting plate, the guide rails are slidably arranged on the guide base, the lifting guide plate is arranged on the lifting and feeding base, the lifting plate and the lifting guide plate are slidably fitted, the upper end of the lifting plate forms an inclined surface downward from the input end to the output end, and the lifting drive is arranged between the lifting and feeding base and the lifting plate; the specific steps of S2 are: S21 The lifting plate moves downward under the action of the lifting drive, so that the input end of the lifting plate is flush with the bottom surface of the storage device, and the rods of the storage device enter the upper end of the lifting plate and are blocked by the lifting guide plate; S22 drives the lifting plate to rise through the lifting drive, limits the position of the bar material by using the upper end of the lifting plate and the lifting guide plate, and drives the bar material to rise to the input end of the material guide device through the lifting plate; S23 Repeat S21 and S22 to lift and transport the next bar.

7. The automatic conveying method for CNC machining bars according to claim 1 is characterized in that: The material guiding device comprises a material guiding base, a material guiding frame and a material guiding adjustment plate. The material guiding base is arranged on the lifting and feeding mechanism. The material guiding frame comprises a material guiding bottom plate and a material guiding side plate. The material guiding side plates are respectively arranged on both sides of the material guiding bottom plate. A material guiding adjustment plate is arranged in the material guiding frame. A material guiding adjustment screw is arranged on the material guiding adjustment plate. A material guiding adjustment nut is rotatably arranged on one of the material guiding side plates. The material guiding adjustment screw is meshed with the material guiding adjustment nut. The input end of the material guiding adjustment plate is arranged to be tilted outward.

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