Automatic bar machining line

Abstract

The invention discloses an automatic bar machining line which comprises a robot for transferring bars among working procedures, and a feeding device, a rough machining milling machine, a buffering device, a finish machining milling machine and a discharging device are sequentially distributed in the machining direction. A rack stepping device in the temporary storage device is used for moving bars to the discharging end in a stepping mode along the feeding end of the temporary storage device and comprises a plurality of static racks extending in the same direction as the stepping direction of the bars and a plurality of movable racks extending in the same direction as the static racks, and the movable racks ascend and descend relative to the static racks. Teeth of the movable rack and teeth of the static rack are arranged at intervals in the stepping direction, each tooth comprises a stepping inclined face inclining downwards in the stepping direction, and bars move downwards along the stepping inclined faces under the action of gravity. The buffering device is matched with the robot for discharging, high-precision, stable and continuous quantitative discharging is provided flexibly, and the machining efficiency is high; the whole machining line is compact in structure, convenient to operate and high in automation degree, and machining quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of bar processing, in particular to an automatic bar processing line. Background Art

[0002] Bar processing involves processing of slender parts, such as lead screws, both ends of which need to be processed, and the processing procedures are relatively complicated. The production line includes a rough milling lathe, a fine milling lathe and a detection mechanism. Usually, a cache device is set on the processing line to solve the problem of remaining bar stock due to inconsistent beats between processes; however, in the prior art, the discharge of the cache device on the bar processing line usually uses a robot to transfer the bar stock, which has a long beat time and a relatively complicated procedure, making it difficult to maintain. In addition, it is difficult for the robot to provide high-precision, stable and continuous quantitative discharge, which affects the processing efficiency. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an automatic bar processing line, including a truss and a robot moving on the truss, and a loading device, a rough processing milling machine, a measuring device, a cache device, a fine processing milling machine and a unloading device are distributed in sequence along the extension direction of the truss on one side of the truss.

[0004] The technical scheme of the present invention is: comprising a truss and a robot moving on the truss, a loading device, a roughing milling machine for rough milling bar materials, a measuring device for detecting the bar materials after rough milling, a buffer device, a finishing milling machine for finishing bar materials and a feeding device are sequentially distributed along the extension direction of the truss on one side of the truss; the buffer device is used to temporarily store the remaining bar materials generated due to the inconsistent beats of roughing and finishing; the robot moves among the loading device, the roughing milling machine, the buffer device, the finishing milling machine and the feeding device to pick up and transfer the bar materials;

[0005] The cache device includes a cache rack and a rack stepping device arranged on the cache rack. The rack stepping device is used to step the bar material along the feed end of the cache device to the discharge end, and includes a plurality of static racks extending in the same direction as the stepping direction of the bar material and a plurality of movable racks extending in the same direction as the static racks. The movable rack is raised and lowered relative to the static rack. The teeth of the movable rack and the teeth of the static rack are arranged at intervals along the stepping direction, and the teeth include a stepping inclined plane inclined downward along the stepping direction. The bar material moves downward along the stepping inclined plane under the action of gravity.

[0006] Its further technical solution is: the movable rack rises and falls under the drive of the rack driving member, and the movable rack and the rack driving member are connected by a cam transmission structure, the cam transmission structure includes a transmission wheel located below the movable rack and an eccentric wheel rollingly connected to the transmission wheel, the eccentric wheel is transmission-connected to the output end of the rack driving member through a transmission rod, and the eccentric wheel rotates eccentrically with the transmission rod to drive the movable rack to rise and fall.

[0007] Its further technical solution is: a plurality of groups of the transmission wheels and the eccentric wheels are provided correspondingly, the plurality of groups of eccentric wheels are arranged axially on the transmission rod, the output end of the rack drive is transmission-connected with a synchronous wheel, and the synchronous wheel and the transmission rod are transmission-connected through a synchronous belt.

[0008] A further technical solution is that a plurality of the movable racks are arranged on a rack bracket, the rack bracket is provided with cache guide rods along the four corners, and the cache guide rods are connected to the cache rack through linear bearings.

[0009] Its further technical solution is: the feed end and the discharge end of the cache device are both provided with a lifting mechanism, the length of the static rack along the stepping direction is greater than the length of the moving rack along the stepping direction, and the ends of the two groups of static racks and the moving rack are combined to form an accommodating space for the lifting mechanism.

[0010] A further technical solution is: the lifting mechanism comprises a lifting drive and a lifting plate arranged at the output end of the lifting drive, and a plurality of feed slots for lifting the rods are arranged axially on the lifting plate.

[0011] A further technical solution is: the feeding device comprises a fixing frame and a code reading mechanism arranged on the fixing frame, and the code reading mechanism comprises a rotating mechanism for driving the bar material to rotate around its own core axis and a camera for obtaining the bar material information.

[0012] Its further technical solution is: the rotating mechanism includes a rotating driving member and a rotating clamping member that moves relative to the rotating driving member, the output end of the rotating driving member is transmission-connected to one end of the rod, and the rotating clamping member includes a plug-in portion that is plug-connected to the end of the other end of the rod.

[0013] Its further technical solution is: the feeding device also includes a feeding table and a recovery table which are arranged on the fixed frame in a downwardly inclined manner from top to bottom, the recovery table is inclined in the opposite direction to the feeding table, and the code reading mechanism is arranged above the lower end of the feeding table.

[0014] Its further technical solution is: a sampling device is also provided between the roughing milling machine and the finishing milling machine, the sampling device includes a sampling rack and a code reading mechanism arranged above the sampling rack, an upper dividing table and a lower dividing table are arranged on the sampling rack in a vertical direction and tilted downward in sequence, the higher end of the upper dividing table is located below the code reading mechanism to recover the rods that fail the code reading, and the robot recovers the unqualified rods detected by the measuring device through the lower dividing table.

[0015] The beneficial technical effects of the present invention are:

[0016] The cache device can effectively solve the problems of low processing efficiency and bar backlog caused by inconsistent rhythm of rough milling and fine milling. At the same time, the rack stepping device can ensure the smooth movement of the bars in the cache device and avoid collision damage between the bars. The curved surface of the eccentric wheel is in rolling contact with the transmission wheel to make the lifting and lowering movement process smoother, reduce the impact when the tip of the moving rack contacts the bar, and help to extend the service life of the moving rack. The cache device cooperates with the robot to discharge materials at the discharge end, and provides high-precision, stable and continuous quantitative discharge on the basis of flexibility, thereby improving processing efficiency.

[0017] The bar materials randomly selected during the processing are tested by the sampling device to monitor the yield rate of the processing line in real time and ensure the quality control and traceability of the bar materials during the processing;

[0018] The entire processing line can complete the rough milling and finishing of the bar material, and perform real-time maintenance of the processing line according to the sampling device to ensure the processing quality. The robot takes and moves the bar material between each process. The entire processing line has a compact structure, convenient operation, high degree of automation, high production efficiency and guaranteed processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the processing line of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the feeding device of the present invention;

[0021] Figure 3 It is a schematic diagram of the partial structure of the feeding device of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the code reading mechanism of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the jacking mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the cache device of the present invention;

[0025] Figure 7 Schematic diagram of the movable rack mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the cam transmission structure in the buffer device of the present invention;

[0027] Fig. 9 is a position relationship diagram of the teeth of the stationary rack and the teeth of the movable rack along the stepping direction of the present invention;

[0028] Fig.10 It is a schematic diagram of the tooth structure of the present invention;

[0029] Fig.11 It is a schematic diagram of the structure of the sampling inspection device of the present invention;

[0030] Among them: 1. feeding device; 11. fixing frame; 12. feeding platform; 121. blocking block; 122. feeding slot; 123. pad rail; 13. code reading mechanism; 131. camera; 132. rotating drive member; 133. rotating clamping member; 134. plug-in part; 14. lifting mechanism; 141. lifting drive member; 142. lifting plate; 143. feeding trough; 144. inclined surface; 145. lifting guide rod; 15. recovery platform;

[0031] 2. Rough machining milling machine;

[0032] 3. Cache device; 31. Cache rack; 32. Stationary rack mechanism; 321. Stationary rack; 33. Moving rack mechanism; 331. Moving rack; 332. Rack drive member; 333. Rack bracket; 334. Transmission wheel; 335. Eccentric wheel; 336. Transmission rod; 34. Tooth; 341. Tip; 342. Stepping ramp; 343. Tooth groove; 35. Baffle;

[0033] 4. Finishing milling machine;

[0034] 5. Sampling device; 51. Cache position; 52. Detection position; 53. Upper material distribution platform; 54. Lower material distribution platform; 55. Lifting device; 551. Moving plate; 552. Extension arm; 553. Bracket;

[0035] 6. Control cabinet;

[0036] 7. Measuring device. DETAILED DESCRIPTION

[0037] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0038] like Figure 1 As shown, the bar material automatic processing line of the present invention comprises a truss extending along the processing direction of the automatic processing line and a truss robot slidably arranged on the truss, and a loading device 1, a roughing milling machine 2, a measuring device 7, a buffer device 3, a finishing milling machine 4 and a feeding device are sequentially arranged on one side of the truss along the processing direction of the automatic processing line. The roughing milling machine 2 is used to perform rough milling on the bar material, the measuring device 7 is used to detect the bar material after rough milling, and the finishing milling machine 4 is used to perform finishing milling on the bar material that has been detected and meets the requirements. The buffer device 3 is used to temporarily store the remaining bar material generated due to the inconsistent roughing and finishing beats.

[0039] like Figures 2 to 4 The feeding device 1 includes a fixed frame 11 and a feeding platform 12 arranged on the fixed frame 11 at an angle downward. The higher end of the feeding platform 12 is defined as the feeding end, and the lower end of the feeding platform 12 is defined as the feeding end. The rod placed at the feeding end rolls toward the feeding end under the action of gravity. Blocking blocks 121 extending in the rolling direction are respectively provided on both sides of the feeding end. When the blocking blocks 121 block the rod at the feeding end, a feeding slot 122 is formed between the rod and the feeding platform 12. Multiple pad rails 123 extending in the rolling direction of the rod are arranged at intervals on the feeding platform 12. The height of each pad rail 123 is adjusted to reduce the risk of easy tilting caused by the different diameters of the contact parts between the rod and each pad rail 123.

[0040] A code reading mechanism 13 is provided above the material taking end, and the code reading mechanism 13 includes a camera 131 that moves in the axial direction, and the camera 131 obtains the information of the bar material during the rotation of the bar material. Specifically, a gantry bracket extending in the axial direction of the bar material is provided above the material taking end on the fixed frame 11, and the camera 131 is driven to move and slidably connected to the gantry bracket through a screw transmission mechanism. The bar material rotates around its own core axis under the drive of the rotating mechanism, and the rotating mechanism includes a rotating driving member 132 and a rotating clamping member 133 that moves relative to the rotating driving member 132. The output end of the rotating driving member 132 is connected to one end of the bar material by transmission, and the end of the rotating clamping member 133 opposite to the rotating driving member 132 is provided with a plug-in portion 134, and the plug-in portion 134 cooperates with the groove at the end of the bar material. When the rotating clamping member 133 and the rotating driving member 132 clamp the bar material, the plug-in portion 134 is connected to the plug-in of the bar material and forms a support for the other end of the bar material.

[0041] A lifting mechanism 14 is provided at the end of the fixed frame 11 at the material taking end. Figure 5The lifting mechanism 14 is used to lift the bar material to the rotating mechanism, so that the rotating clamping member 133 and the rotating driving member 132 can clamp the bar material and drive the bar material to rotate under the drive of the rotating driving member 132. The lifting mechanism 14 includes a lifting driving member 141 and a lifting plate 142 arranged at the output end of the lifting driving member 141. A plurality of lifting arms are arranged axially on the lifting plate 142, and a feeding trough 143 for lifting the bar material is provided at the top of each lifting arm. The feed trough 143 is V-shaped, including a longer inclined surface 144 extending toward the material picking end. The inclined surface 144 is penetrated through the loading slot 122 when being lifted by the lifting drive 141, and drives the bar material to roll along the inclined surface 144 to the bottom of the feed trough 143, and then drives the bar material to be lifted to the position of the rotating mechanism for clamping and rotating code reading. When the code reading operation is completed, the rotating clamping member 133 moves away from the rotating drive 132, and the bar material falls back to the bottom of the feed trough 143. For the bar material that has successfully read the code, it is lifted by the lifting drive 141 to wait for the robot to grab it; for the bar material that has failed to read the code, it is driven to descend by the lifting drive 141 to recover the bar material.

[0042] Furthermore, lifting guide rods 145 are provided at both ends of the lifting plate 142 on the fixing frame 11, and the lifting plate 142 is penetrated by a guide sleeve and slidably connected to the lifting guide rods 145 to ensure that the lifting plate 142 does not deviate when moving in the vertical direction.

[0043] In this embodiment, a downwardly inclined recovery platform 15 is provided below the loading platform 12. The recovery platform 15 is inclined in the opposite direction to the loading platform 12, that is, the higher end of the recovery platform 15 is close to the material taking end, and the lower end of the recovery platform 15 is close to the material feeding end. The recovery platform 15 includes a plurality of tracks extending along the rolling direction of the bar material, and the plurality of tracks are arranged side by side along the axial direction of the bar material. A pad rail 123 is provided on each track, and the gap between the tracks is provided for the lifting arm and the feed trough 143 to pass through when lifting and lowering. Driven by the lifting drive 141, the feed trough 143 drives the bar material to descend to the recovery platform 15, and the feed trough 143 continues to descend, while the bar material rolls along the plurality of tracks from the higher end to the lower end.

[0044] like Figures 6 to 8The buffer device 3 has a feeding end and a discharging end along the stepping direction of the bar material, and includes a buffer rack 31 and a rack stepping device arranged on the buffer rack 31. The rack stepping device includes a static rack mechanism 32 and a movable rack mechanism 33. The static rack mechanism 32 includes a plurality of static racks 321 extending in the same direction as the stepping direction of the bar material, and the plurality of static racks 321 are arranged in parallel on the buffer rack 31. In this embodiment, the static racks 321 are provided with two groups, and the two groups of static racks 321 are respectively used to support the two ends of the bar material. The two groups of static racks 321 can move relative to each other to adjust the distance between them to meet the requirements of bar materials of different lengths. The bars are spaced by the teeth 34 of the static racks 321 to prevent the bars from colliding with each other; a buffer slot is formed between the two groups of static racks 321 and the buffer rack 31, and the movable rack mechanism 33 is arranged in the buffer slot.

[0045] like Figures 9 and 10 The movable rack mechanism 33 includes a plurality of movable racks 331 extending in the same direction as the stationary racks 321 and a rack driving member 332 driving the plurality of stationary racks 321 to rise and fall and passing through the cache slot. The teeth 34 of the movable rack 331 and the teeth 34 of the stationary rack 321 are spaced apart along the stepping direction. The teeth 34 include a tip 341, a stepping inclined surface 342 and a tooth groove 343 inclined downward along the stepping direction. The movable rack 331 and the rack driving member 332 are connected by a cam transmission structure.

[0046] Specifically, the plurality of movable racks 331 are fixedly connected to a rack support 333 to ensure the synchronization of the lifting of the plurality of movable racks 331. Figure 8 The cam transmission structure includes a transmission wheel 334 located below the rack bracket 333, and an eccentric wheel 335 rollingly connected to the transmission wheel 334. The eccentric wheel 335 is transmission-connected to the output end of the rack driving member 332 through a transmission rod 336. Under the drive of the rack driving member 332, the transmission rod 336 drives the eccentric wheel 335 to rotate eccentrically, so as to drive the rack 331 bracket to perform lifting and lowering motion with the transmission wheel 334. The curved surface of the eccentric wheel 335 is in rolling contact with the transmission wheel 334, so that the lifting and lowering motion process is smoother, and the impact of the tip 341 of the movable rack 331 when it contacts the bar material is reduced, which helps to extend the service life of the movable rack 331.

[0047] Furthermore, the wear of the tip 341 of the movable rack 331 is reduced by increasing the width of each movable rack 331 .

[0048] In this embodiment, the transmission wheel 334 and the eccentric wheel 335 are provided in multiple groups corresponding to each other, and the multiple groups of eccentric wheels 335 are arranged axially on the transmission rod 336. The output end of the rack drive 332 is connected to the synchronous wheel, and the synchronous wheel and the transmission rod 336 are connected through a synchronous belt transmission.

[0049] Furthermore, the rack bracket 333 is provided with cache guide rods along the four corners, and the cache guide rods are connected to the cache rack 31 through linear bearings. The opposite outer sides of the static rack 321 are provided with baffles 35 extending along the stepping direction, and the baffles 35 are used to prevent the bar from deviating axially during the stepping movement, and the baffles 35 move synchronously with the static rack 321.

[0050] During operation, a number of bars are arranged on the stationary rack 321 at intervals. When discharging is required, the rack drive 332 is driven to drive the movable rack 331 to lift up through the cam transmission structure. The tip 341 of the teeth 34 of the movable rack 331 gradually lifts the bars until the bars roll along the stepping slope 342 to the tooth groove 343 under the action of gravity. At this time, the eccentric wheel 335 continues to rotate and drives the movable rack 331 to descend. At this time, the bars are retained on the stationary rack 321 and slide down along the stepping slope 342 of the teeth 34 of the stationary rack 321 to the tooth groove 343 to complete the stepping movement of the bars from the feeding end to the discharging end. The rack stepping device can ensure the smooth movement of the bars in the buffer device 3 while avoiding damage to the bars.

[0051] In this embodiment, the feeding end and the discharging end are both provided with a lifting mechanism 14, and the length of the static rack 321 along the stepping direction is greater than the length of the moving rack 331 along the stepping direction, so that the ends of the two sets of static racks 321 and the moving rack 331 are enclosed to form a accommodating space for the lifting mechanism 14. During feeding, the robot transfers the rough-processed bar material to the lifting mechanism 14 at the feeding end, and the lifting mechanism 14 drives the bar material to descend through the feeding groove 143 and then places the bar material on the static rack 321, and slides down to the tooth groove 343 through the stepping inclined surface 342 of the static rack 321, and the bar material is located above the moving rack 331; during discharging, after the bar material slides down to the tooth groove 343 along the stepping inclined surface 342 of the static rack 321, the lifting mechanism 14 at the discharging end lifts the bar material to the robot's material picking height to complete the discharging.

[0052] The robot moves the bar material on the buffer device 3 to the finishing milling machine 4 for finishing, and then passes through the unloading device and waits for unloading to enter the next process. The unloading device and the buffer device 3 have the same structure.

[0053] In this embodiment, a sampling device 5 is further provided between the roughing milling machine 2 and the finishing milling machine 4. Fig.11 The sampling device 5 is used to randomly select bars for measurement during the processing to monitor the yield rate of the processing line in real time, including randomly selecting bars after rough processing or fine processing. The sampling device 5 includes a sampling rack, and the top of the sampling rack includes a bar buffer position 51 for placing the bars to be tested and a detection position 52 for detecting the bars. A code reading mechanism 13 is provided at the detection position 52, which will not be described in detail here.

[0054] It should be noted that, in this embodiment, the code reading mechanism 13 is used to ensure the quality control and traceability of the bar material before and after processing. That is, the code reading mechanism 13 located in the feeding device 1 is used to verify the specifications and status of the original bar material, while the code reading mechanism 13 in the sampling device 5 is helpful to confirm the qualification of the bar material after rough milling and fine milling, ensure the accuracy of data recording, thereby optimizing the processing flow and improving the consistency of the bar material.

[0055] An upper material distribution platform 53 and a lower material distribution platform 54 are arranged on the sampling rack in a vertical direction, tilted downward in sequence. The upper material distribution platform 53 and the lower material distribution platform 54 are parallel to each other, and the higher ends of the upper material distribution platform 53 and the lower material distribution platform 54 are both located below the code reading mechanism 13. In this embodiment, the upper material distribution platform 53 and the lower material distribution platform 54 have the same structure as the recovery platform 15, which will not be repeated here. It is worth noting that the multiple tracks of the lower material distribution platform 54 located at the higher end extend outward beyond the upper material distribution platform 53. The upper material distribution platform 53 is used to recycle the bar materials that fail to read the code after sampling the bar materials after rough milling and fine milling; the lower material distribution platform 54 is used to recycle the bar materials that fail to pass the processing, that is, after the bar materials after rough milling are detected by the measuring device 7, the robot will recycle the bar materials that fail to pass the processing through the lower material distribution platform 54.

[0056] A lifting device 55 is provided at the higher end side of the upper material distribution platform 53 and the lower material distribution platform 54, and the lifting device 55 includes an upper lifting mechanism arranged in cooperation with the upper material distribution platform 53 and a lower lifting mechanism arranged in cooperation with the lower material distribution platform 54. The upper lifting mechanism and the lower lifting mechanism both include a movable plate 551 extending along the axial direction of the rod and being vertically movable. A plurality of extension arms 552 are axially arranged on the movable plate 551 and extend toward the gap between the rails. A bracket 553 for lifting the rod is provided at the free end of each extension arm 552. The bracket 553 rises with the movable plate 551 and supports the rod and then descends until the rod is placed on the upper material distribution platform 53 and the lower material distribution platform 54, respectively.

[0057] A control cabinet 6 is also provided on one side of the truss, and the robot is set and controlled by the control cabinet 6 to control the robot to pick up and transfer the bar material between the loading device 1, the rough processing milling machine 2, the measuring device 7, the buffer device 3, the fine processing milling machine 4 and the unloading device during the movement of the robot along the truss, so as to make the connection between the various processes in the whole processing line compact and improve the processing efficiency.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. Automatic bar processing line, characterized by: The invention comprises a truss and a robot moving on the truss, wherein a loading device (1), a roughing milling machine (2) for rough milling a bar material, a measuring device (7) for detecting the bar material after rough milling, a buffer device (3), a finishing milling machine (4) for finishing milling a bar material, and a material unloading device are sequentially arranged on one side of the truss along the extension direction of the truss; the buffer device (3) is used to temporarily store the remaining bar material generated due to the inconsistency between the roughing and finishing cycles; the robot moves among the loading device (1), the roughing milling machine (2), the buffer device (3), the finishing milling machine (4), and the material unloading device to pick up and transfer the bar material; The cache device (3) includes a cache rack (31) and a rack stepping device arranged on the cache rack (31), the rack stepping device is used to step the bar material along the feed end of the cache device (3) to the discharge end, and includes a plurality of stationary racks (321) extending in the same direction as the bar material stepping direction and a plurality of movable racks (331) extending in the same direction as the stationary racks (321), the movable racks (331) rise and fall relative to the stationary racks (321); the teeth (34) of the movable racks (331) and the teeth (34) of the stationary racks (321) are arranged at intervals along the stepping direction, the teeth (34) include a stepping inclined surface (342) inclined downward along the stepping direction, and the bar material moves downward along the stepping inclined surface (342) under the action of gravity.

2. The automatic bar processing line according to claim 1 is characterized in that: The movable rack (331) is driven by the rack driving member (332) to rise and fall. The movable rack (331) and the rack driving member (332) are connected by a cam transmission structure. The cam transmission structure comprises a transmission wheel (334) located below the movable rack (331) and an eccentric wheel (335) rollingly connected to the transmission wheel (334). The eccentric wheel (335) is transmission-connected to the output end of the rack driving member (332) via a transmission rod (336). The eccentric wheel (335) rotates eccentrically with the transmission rod (336) to drive the movable rack (331) to rise and fall.

3. The automatic bar processing line according to claim 2 is characterized in that: The transmission wheel (334) and the eccentric wheel (335) are provided in a plurality of groups corresponding to each other. The plurality of eccentric wheels (335) are arranged on the transmission rod (336) along the axial direction. The output end of the rack drive member (332) is transmission-connected with a synchronous wheel. The synchronous wheel and the transmission rod (336) are transmission-connected via a synchronous belt.

4. The automatic bar processing line according to claim 1 is characterized in that: A plurality of movable racks (331) are arranged on a rack bracket (333), and the rack bracket (333) is provided with cache guide rods along four corners, and the cache guide rods are connected to the cache rack (31) through linear bearings.

5. The automatic bar processing line according to claim 1 is characterized in that: The feeding end and the discharging end of the buffer device (3) are both provided with a lifting mechanism (14); the length of the stationary rack (321) along the stepping direction is greater than the length of the movable rack (331) along the stepping direction; the ends of the two groups of stationary racks (321) and the movable rack (331) are combined to form a accommodating space for the lifting mechanism (14).

6. The automatic bar processing line according to claim 5, characterized in that: The lifting mechanism (14) comprises a lifting drive member (141) and a lifting plate (142) arranged at the output end of the lifting drive member (141), and a plurality of feeding grooves (143) for lifting rods are arranged axially on the lifting plate (142).

7. The automatic bar processing line according to claim 1 is characterized in that: The loading device (1) comprises a fixed frame (11) and a code reading mechanism (13) arranged on the fixed frame (11); the code reading mechanism (13) comprises a rotating mechanism for driving the bar material to rotate around its own core axis and a camera (131) for acquiring bar material information.

8. The automatic bar processing line according to claim 7, characterized in that: The rotating mechanism comprises a rotating driving member (132) and a rotating clamping member (133) which moves relative to the rotating driving member (132); the output end of the rotating driving member (132) is drivingly connected to one end of the bar material; the rotating clamping member (133) comprises a plug-in portion (134) which is plug-inly connected to the end of the other end of the bar material.

9. The automatic bar processing line according to claim 7, characterized in that: The feeding device (1) further comprises a feeding platform (12) and a recovery platform (15) which are arranged on the fixed frame (11) in a downwardly inclined manner from top to bottom, wherein the recovery platform (15) is inclined in the opposite direction to the feeding platform (12), and the code reading mechanism (13) is arranged above the lower end of the feeding platform (12).

10. The automatic bar processing line according to claim 7, characterized in that: A sampling device (5) is also provided between the roughing milling machine (2) and the finishing milling machine (4), and the sampling device (5) comprises a sampling frame and a code reading mechanism (13) arranged above the sampling frame, and an upper material dividing table (53) and a lower material dividing table (54) are arranged on the sampling frame in a vertical direction and tilted downward in sequence, and the higher end of the upper material dividing table (53) is located below the code reading mechanism (13) to recover the bar materials that fail to pass the code reading, and the robot recovers the unqualified processing bar materials detected by the measuring device (7) through the lower material dividing table (54).

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