Turnover bar grinding system and bar turnover method thereof

Abstract

The invention discloses a turnover bar grinding system and a bar turnover method thereof. The turnover bar grinding system comprises a feeding mechanism, a first machining tool, a second machining tool, a first feeding ramp, a second feeding ramp, a first conveying ramp and a receiving ramp. The feeding mechanism is connected with the first feeding ramp, the bar rolls to the first grinding station along the first feeding ramp, and the first processing machine tool can grind one end of the bar at the first grinding station; the discharging end of the first grinding station is connected with a first conveying ramp, the bar rolls into the overturning mechanism along the first conveying ramp, and the overturning mechanism overturns the unmachined end of the bar to the machining side; the discharging end of the turnover mechanism is connected with a second feeding ramp, the bars roll to a second grinding station along the second feeding ramp, and the second machining tool can grind the other ends of the bars at the second grinding station; and the discharging end of the second grinding station is connected with a material receiving ramp. The device can be used for continuously machining the bar with the two ends needing to be ground.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, and in particular to a reversible bar grinding system and a bar reversing method thereof. Background Art

[0002] Precision grinding is a high-precision processing method, which is widely used in the processing of various high-precision parts and workpieces. Through precise grinding parameter settings and grinding process control, the surface of the workpiece can be finely processed to achieve the required size, shape and surface quality. However, in most factories today, manual loading and unloading operations are still used. In the process of grinding both ends of the bar, when one end of the bar is ground, workers often need to manually flip the bar so that the unprocessed end of the bar is turned to face the processing machine, resulting in low grinding efficiency of the bar. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a reversible bar grinding system and a bar reversing method thereof, aiming at continuously processing bars that need to be ground at both ends.

[0004] Technical solution: To achieve the above-mentioned purpose, a reversible bar grinding system of the present invention includes a feeding mechanism for providing bar materials, a first processing machine tool and a second processing machine tool for grinding the bar materials, and a ramp assembly for conveying the bar materials; one side of the ramp assembly is the processing side, and the first processing machine tool and the second processing machine tool are both located on the processing side of the ramp assembly; the ramp assembly includes a first feeding ramp, a second feeding ramp, a first conveying ramp and a receiving ramp; the discharge end of the feeding mechanism is connected to the first feeding ramp, and the bar materials can roll along the first feeding ramp At the first grinding station, the first processing machine tool can grind one end of the bar at the first grinding station; the discharge end of the first grinding station is connected to the first conveying ramp, the bar can roll along the first conveying ramp into the flipping mechanism, and the flipping mechanism can flip the unprocessed end of the bar to face the processing side; the discharge end of the flipping mechanism is connected to the second feeding ramp, the bar can roll along the second feeding ramp to the second grinding station, and the second processing machine tool can grind the other end of the bar at the second grinding station; the discharge end of the second grinding station is connected to the receiving ramp.

[0005] Furthermore, the flipping mechanism includes a disc-shaped box, in which a rotatable flipping frame is arranged, and a flipping inlet and a flipping outlet are respectively opened on opposite sides of the disc-shaped box, and the flipping inlet and the flipping outlet are respectively located on both sides of the rotating shaft of the flipping frame; a flipping cavity is arranged on the flipping frame, and openings are provided at both ends of the flipping cavity, and the openings at both ends of the flipping cavity are respectively close to the inner walls of both sides of the disc-shaped box; during the flipping process of the flipping frame, the flipping cavity can be flipped into a feeding posture and a discharging posture; in the feeding posture, the feeding end opening of the flipping cavity is connected to the flipping inlet; in the discharging posture, the discharging end opening of the flipping cavity is connected to the flipping outlet.

[0006] Furthermore, two flaps are arranged opposite to each other in the flipping chamber; in the feeding posture and the discharging posture of the flipping chamber, the upper and lower positions of the two flaps are interchanged; the flaps are inclined plates; in the feeding posture, the inclined upper end of the flap located below is connected to the flipping inlet; in the discharging posture, the inclined lower end of the flap located below is connected to the flipping outlet.

[0007] Furthermore, the two flaps in the turning cavity are a movable flap and a fixed flap. The fixed flap is fixed in the turning cavity, and the movable flap can be movably raised and lowered to approach or move away from the fixed flap, so that the movable flap and the fixed flap can cooperate to clamp or release the bar material.

[0008] Furthermore, in the feeding posture, the movable flap is located below the fixed flap; the side of the movable flap close to the flip inlet and the side close to the flip outlet can be raised and lowered separately, so that the inclination direction of the movable flap can be changed, so that the bar material can roll to the side where the flip inlet is located after the movable flap changes its inclination direction.

[0009] Furthermore, a lifting mechanism is provided between the turning mechanism and the second feeding ramp; the rods output by the turning mechanism are lifted by the lifting mechanism and then enter the second feeding ramp.

[0010] Furthermore, the lifting mechanism includes a lifting box, which has a vertical lifting channel inside, and a lifting outlet and a lifting inlet are respectively provided on the upper and lower sides of the lifting channel; the lifting outlet is connected to the feeding end of the second feeding ramp, and the lifting inlet is connected to the flip outlet through the second conveying ramp; there is a liftable lifting plate in the lifting channel, and the lifting plate is inclined; the lifting outlet and the lifting inlet are respectively located on both sides of the lifting box, and the inclined lower end of the lifting plate is close to the lifting outlet.

[0011] Furthermore, the feeding mechanism includes a storage bin, a rotatable feeding wheel is provided in the storage bin, and a plurality of material clamping grooves are distributed circumferentially on the edge of the feeding wheel; a feeding port is provided on the storage bin, and when the feeding wheel rotates, the plurality of material clamping grooves on the feeding wheel are alternately opposite to the feeding port.

[0012] Furthermore, a first electromagnetic push rod and a second electromagnetic push rod are respectively provided at the bottom of the first feeding ramp and the bottom of the second feeding ramp. The first electromagnetic push rod can push the rod at the bottom of the first feeding ramp to the first grinding station, and the second electromagnetic push rod can push the rod at the bottom of the second feeding ramp to the second grinding station.

[0013] Furthermore, a rod flipping method for a flippable rod grinding system comprises the following steps: Step S1: the flipping chamber is in a feeding posture, and the rod rolls into the flipping chamber from the flipping inlet; Step S2: the flipping frame flips until the feeding end opening of the flipping chamber is staggered with the flipping inlet, and the movable flap is still located below the fixed flap; Step S3: the side of the movable flap close to the flipping outlet rises, and the inclination direction of the movable flap is changed, so that the rod rolls to the side where the flipping inlet is located; Step S4: the side of the movable flap close to the flipping inlet rises until the movable flap cooperates with the fixed flap to clamp the rod; Step S5: the flipping frame continues to flip until the discharge end opening of the flipping chamber is connected to the flipping outlet, at which time the upper and lower positions of the movable flap and the fixed flap are interchanged; Step S6: the movable flap rises and resets and moves away from the fixed flap, so that the movable flap and the fixed flap release the rod, and the rod rolls along the inclined fixed flap under the action of gravity, and rolls out of the flipping mechanism from the flipping outlet.

[0014] Beneficial effects: The reversible bar grinding system and the bar reversing method of the present invention have the following beneficial effects:

[0015] 1) A turning mechanism is provided, which can turn the unprocessed end of the bar material to face the processing machine tool, and cooperate with the ramp assembly for conveying the bar material to realize continuous grinding processing at both ends of the bar material;

[0016] 2) There are movable flaps and fixed flaps in the turning cavity of the turning mechanism, and the movable flaps and fixed flaps can cooperate to clamp the bar material, so that the bar material can be turned over when being clamped, so as to ensure that the bar material can be turned over smoothly; thus, the turning mechanism of the present invention can also be applied to shorter bar materials, so as to prevent the shorter bar materials from being stuck in the turning cavity;

[0017] 3) Both the movable flap and the fixed flap are inclined plates, and the two sides of the movable flap can be independently raised and lowered to change the tilting direction of the movable flap; therefore, when the movable flap and the fixed flap release the rod material, the rod material is located at the inclined upper end of the fixed flap, and the plate material will roll along the fixed flap under the action of gravity and roll out of the flipping mechanism from the flipping outlet, so that the rod material is not easily stuck at the flipping outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the overall structure of the reversible bar grinding system;

[0019] Attached Figure 2 It is a structural schematic diagram of the flipping mechanism;

[0020] Attached Figure 3 It is a schematic diagram of the shape change of the turning cavity during the turning process of the bar;

[0021] Attached Figure 4 It is a structural schematic diagram of the lifting mechanism;

[0022] Attached Figure 5 It is a structural diagram of the feeding mechanism. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] As attached Figures 1 to 5 The reversible bar grinding system comprises a feeding mechanism 1 for providing bar 18, a first processing machine 2 and a second processing machine 3 for grinding bar 18, and a ramp assembly for conveying bar 18. Figure 1 As shown in , due to the reasonable arrangement of the device, one side of the ramp assembly is the processing side, the first processing machine 2 and the second processing machine 3 are both located on the processing side of the ramp assembly, and the other side of the ramp assembly is convenient for workers to observe the grinding processing of the rod 18.

[0025] The ramp assembly is formed by connecting a plurality of ramps. Specifically, the ramp assembly includes a first feeding ramp 4 , a second feeding ramp 5 , a first conveying ramp 6 and a receiving ramp 7 .

[0026] The feeding mechanism 1 stores the bar material 18, and the discharge end of the feeding mechanism 1 is connected to the first feeding ramp 4. The bar material 18 output by the feeding mechanism 1 will roll to the upper inclined end of the first feeding ramp 4, and the lower inclined end of the first feeding ramp 4 is provided with a first grinding station 8. Under the action of gravity, the bar material 18 will roll along the first feeding ramp 4 to the first grinding station 8. The first processing machine tool 2 is located at the first grinding station 8, and the first processing machine tool 2 can grind one end of the bar material 18 at the first grinding station 8.

[0027] The discharge end of the first grinding station 8 is connected to the upper oblique end of the first conveying ramp 6, and a turning mechanism 9 is provided at the lower oblique end of the first grinding station 8. After the bar 18 at the first grinding station 8 is processed, it rolls to the upper oblique end of the first conveying ramp 6, and then under the action of gravity, the bar 18 rolls along the first conveying ramp 6 into the turning mechanism 9. The turning mechanism 9 can turn the bar 18 180 degrees, so that the unprocessed end of the bar 18 is turned to face the processing side.

[0028] The discharge end of the flipping mechanism 9 is connected to the second feeding ramp 5, and the flipped bar 18 enters the oblique upper end of the second feeding ramp 5. The oblique lower end of the second feeding ramp 5 is provided with a second grinding station 10, and the second processing machine tool 3 is correspondingly located at the second grinding station 10. Under the action of gravity, the bar 18 can roll along the second feeding ramp 5 to the second grinding station 10, and the second processing machine tool 3 can grind the other end of the bar 18 at the second grinding station 10. The discharge end of the second grinding station 10 is connected to the receiving ramp 7, and the bar 18 with both ends ground rolls onto the receiving ramp 7. In this way, continuous processing of both ends of the bar 18 is achieved, and workers do not need to transfer and flip the bar 18. Workers only need to add the bar 18 to the feeding mechanism 1 and collect the bar 18 with both ends ground on the receiving ramp 7, which improves the efficiency of grinding and reduces the workload of workers.

[0029] As attached Figure 1 and 2 As shown in the figure, the turning mechanism 9 includes a vertically arranged disc-shaped box 11, which is fixedly arranged on a bracket. A rotatable turning frame 12 is arranged in the disc-shaped box 11, and a rotating shaft is connected at the center of the turning frame 12. One end of the rotating shaft passes through the box body and is connected to the motor through a belt. The motor can drive the turning frame 12 to rotate through the belt and the rotating shaft. Figure 2 As shown in FIG. 1 , a reversing inlet 13 and a reversing outlet 14 are respectively provided on opposite sides of the disc-shaped box 11, and the reversing inlet 13 and the reversing outlet 14 are respectively located on both sides of the rotating shaft of the reversing frame 12. The reversing outlet 14 is connected to the oblique lower end of the first conveying ramp 6.

[0030] The turning frame 12 is provided with a turning cavity 15, and the two ends of the turning cavity 15 have openings, and the two end openings of the turning cavity 15 are respectively opposite to the inner walls of the two sides of the disc-shaped box 11, and the two end openings of the turning cavity 15 are respectively close to the inner walls of the two sides of the disc-shaped box 11. During the turning process of the turning frame 12, the turning cavity 15 can be turned into a feeding posture and a discharging posture; in the feeding posture, the feeding end opening of the turning cavity 15 is connected with the turning inlet 13, and the rod 18 can roll into the turning inlet 13 along the first conveying ramp 6, and then enter the turning cavity 15. In the discharging posture, the discharging end opening of the turning cavity 15 is connected with the turning outlet 14, and the rod 18 can roll out of the turning cavity 15 from the turning outlet 14.

[0031] As attached Figure 2 As shown in FIG. 1 , a turning cavity 15 is respectively disposed on both sides of the rotating shaft of the turning frame 12 , and the two turning cavities 15 alternately take in and out the rods 18 .

[0032] Two flaps are arranged opposite to each other in the turning cavity 15. When the turning cavity 15 is in the feeding posture or the discharging posture, the two flaps are respectively located at the upper and lower sides of the turning cavity 15. When the turning cavity 15 is in the feeding posture and the discharging posture, the upper and lower positions of the two flaps are interchanged.

[0033] The flap is an inclined plate. Figure 3 As shown in the variation step a, in the feeding posture, the upper oblique end of the flap located below is connected to the flip inlet 13 to prevent the bar 18 from rolling out of the flip inlet 13 after entering the flipping cavity 15. Figure 3 As shown in the variation step h, in the discharging posture, the oblique lower end of the flap located below is connected to the flip outlet 14, so that the bar 18 can roll out from the flip outlet 14 more smoothly.

[0034] The two flaps in the turnover cavity 15 are respectively a movable flap 16 and a fixed flap 17. The fixed flap 17 is fixed in the turnover cavity 15. The movable flap 16 can be moved up and down in the turnover cavity 15 to approach or move away from the fixed flap 17, so that the movable flap 16 and the fixed flap 17 can cooperate to clamp or release the bar 18. In the process of the bar 18 turning over, the movable flap 16 and the fixed flap 17 can cooperate to clamp the bar 18, and then release the bar 18 after the turning over is completed. In this way, the posture of the bar 18 can be controlled in the turning process to ensure that the bar 18 can be turned over smoothly. In particular, when the length of the bar 18 is shorter than the height of the turnover cavity 15, the posture of the bar 18 in the turning process is difficult to control, and it is difficult to ensure that the bar 18 is turned over successfully. The bar 18 may also be stuck in the turnover cavity 15. If the bar 18 is turned over while being clamped, it can ensure that the bar 18 is turned over successfully.

[0035] As attached Figure 3 As shown in the change step a in the figure, when in the feeding posture, the movable flap 16 is located below the fixed flap 17. The side of the movable flap 16 close to the flip inlet 13 and the side close to the flip outlet 14 can be raised and lowered separately, so that the tilt direction of the movable flap 16 can be changed. In one embodiment, two electric push rods are installed on the flip frame 12, and the output ends of the two electric push rods are respectively connected to the two sides of the movable flap 16, so that the two sides of the movable flap 16 can be controlled to rise and fall separately. Figure 3 As shown in the variation steps b to d in the embodiment, the bar 18 can roll to the side where the flip entrance 13 is located after the movable flap 16 changes its tilting direction. Figure 3 As shown in the variation step g, the bar 18 is located at the upper end of the fixed flap 17 rather than the lower end, so the bar 18 is more likely to roll out of the flipping cavity 15 under the action of gravity. If the bar 18 is located at the lower end of the fixed flap 17 after flipping, the bar 18 may be stuck in the flipping outlet 14.

[0036] As attached Figure 1 As shown in the figure, a lifting mechanism 19 is further provided between the turning mechanism 9 and the second feeding ramp 5. The bar 18 output by the turning mechanism 9 is lifted by the lifting mechanism 19 and then enters the second feeding ramp 5. In the present invention, the transmission of the bar 18 mainly relies on the ramp, so inevitably, the bar 18 will gradually roll down from a high position to a lower position, and at this time, the lifting mechanism 19 is required to lift the bar 18 to a height suitable for processing.

[0037] As attached Figure 4 As shown in the figure, the lifting mechanism 19 includes a lifting box 20, and a vertical lifting channel is provided in the lifting box 20. A lifting outlet 21 and a lifting inlet 22 are respectively provided on the upper and lower sides of the lifting channel. The lifting outlet 21 is connected to the feeding end of the second feeding ramp 5, and the lifting inlet 22 is connected to the flip outlet 14 through the second conveying ramp 23. There is a lifting plate 24 that can be raised and lowered in the lifting channel. In one embodiment, a screw screw mechanism is provided at the lower end of the lifting plate 24. The motor drives the screw screw mechanism to move, and then drives the lifting plate 24 to rise and fall.

[0038] The lifting outlet 21 and the lifting inlet 22 are respectively located on both sides of the lifting box 20, the upper oblique end of the lifting plate 24 is close to the lifting inlet 22, and the lower oblique end of the lifting plate 24 is close to the lifting outlet 21, so that the bar 18 entering the lifting box 20 is not easy to roll out from the lifting inlet 22, but is more likely to roll out from the lifting outlet 21. After the bar 18 rolls out of the turning mechanism 9, it rolls into the lifting inlet 22 along the second conveying ramp 23 and falls on the lifting plate 24, and then the lifting plate 24 is lifted, so that the bar 18 rolls out from the lifting outlet 21 to the second feeding ramp 5.

[0039] As attached Figure 5 As shown in the figure, the feeding mechanism 1 includes a storage bin 25, in which a rotatable feeding wheel disc 26 is arranged. The feeding wheel disc 26 is driven to rotate by a motor, and the feeding wheel disc 26 is a vertical disc. A plurality of clamping grooves are distributed circumferentially on the edge of the disk of the feeding wheel disc 26. The shape of the clamping grooves is consistent with the cross-sectional shape of the bar material 18, so that a single bar material 18 can be clamped into the clamping groove. A feeding port 27 is arranged on the storage bin 25. When the feeding wheel disc 26 rotates, a plurality of clamping grooves on the feeding wheel disc 26 are alternately opposite to the feeding port 27, so that the bar material 18 clamped in the clamping groove can roll out from the feeding port 27 to the first feeding ramp 4.

[0040] The bottom of the first feeding ramp 4 and the bottom of the second feeding ramp 5 are respectively provided with a first electromagnetic push rod 28 and a second electromagnetic push rod 29. The first grinding station 8 is arranged at one side of the bottom of the first feeding ramp 4, and the first electromagnetic push rod 28 can push the bar 18 at the bottom of the first feeding ramp 4 to the first grinding station 8. The second grinding station 10 is arranged at one side of the bottom of the second feeding ramp 5, and the second electromagnetic push rod 29 can push the bar 18 at the bottom of the second feeding ramp 5 to the second grinding station 10.

[0041] Sensors 30 are also provided on the first feeding ramp 4 and the second feeding ramp 5. The sensors 30 can monitor when the rods 18 pass through the first feeding ramp 4 and the second feeding ramp 5, and then control the discharge speed of the feeding mechanism 1 to prevent the rods 18 from accumulating on the first feeding ramp 4 and the second feeding ramp 5.

[0042] During the operation of the flippable bar 18 grinding system of the present invention, the bar 18 is fed to the first feeding ramp 4 by the loading mechanism 1, then rolls to the bottom of the first feeding ramp 4, and is pushed to the first grinding station 8 by the first electromagnetic push rod 28, and the first processing mechanism grinds one end of the bar 18 at the first grinding station 8; after one end of the bar 18 is processed, the bar 18 rolls along the first conveying ramp 6 into the flipping mechanism 9, and in the flipping mechanism 9, the unprocessed end of the bar 18 is flipped to the side facing the processing machine tool; after the bar 18 leaves the flipping mechanism 9, it enters the lifting mechanism 19 along the second conveying ramp 23, is lifted by the lifting mechanism 19, and then enters the second feeding ramp 5, gradually rolls to the bottom of the second feeding ramp 5, and then the second electromagnetic push rod 29 pushes the bar 18 to the second grinding station 10, and the second processing machine tool 3 grinds the other end of the bar 18. After the grinding process of both ends of the bar material 18 is completed, the bar material 18 rolls into the material receiving ramp 7.

[0043] The present invention also provides a method for turning over a bar 18 of a turnable bar grinding system, comprising the following steps, and in combination with the attached Figure 3 Explain each step:

[0044] Step S1: As shown in the variation step a, at this time, the turning cavity 15 is in a feeding posture, and the bar material 18 rolls from the turning inlet 13 into the turning cavity 15 along the first conveying ramp 6;

[0045] Step S2: As shown in the variation step b, the turning frame 12 starts to turn over until the feed end opening of the turning cavity 15 is staggered with the turning inlet 13, and the movable flap 16 is still located below the fixed flap 17;

[0046] Step S3: As shown in the variation step c, the side of the movable flap 16 close to the flip outlet 14 rises, changing the tilt direction of the movable flap 16 so that the bar 18 rolls toward the side where the flip inlet 13 is located;

[0047] Step S4: As shown in the variation step g, the side of the movable flap 16 close to the flip inlet 13 rises until the movable flap 16 cooperates with the fixed flap 17 to clamp the bar 18;

[0048] Step S5: As shown in the variation steps e and f, the turning frame 12 continues to turn over until the discharge end opening of the turning cavity 15 is connected to the turning outlet 14, at which time the upper and lower positions of the movable flap 16 and the fixed flap 17 are interchanged;

[0049] Step S6: As shown in variation steps g and h, the movable flap 16 rises and resets and moves away from the fixed flap 17, so that the movable flap 16 and the fixed flap 17 release the rod 18, and the rod 18 rolls along the inclined fixed flap 17 under the action of gravity and rolls out of the flip mechanism 9 from the flip outlet 14.

[0050] There are two advantages to using the method for turning over the bar 18 in the present invention. The first advantage is that during the turning process, the movable flap 16 and the fixed flap 17 cooperate to clamp the bar 18, and then release the bar 18 after the turning is completed, so the posture of the bar 18 can be controlled during the turning process. In particular, when the length of the bar 18 is shorter than the height of the turning cavity 15, the posture of the bar 18 during the turning process is difficult to control, and it is difficult to ensure that the bar 18 is turned over successfully. The bar 18 may also be stuck in the turning cavity 15. Turning over the bar 18 while being clamped can ensure that the bar 18 is turned over successfully.

[0051] The second advantage is that after the rod 18 completes the flipping, the rod 18 will be located at the inclined upper end of the fixed flip plate 17 as shown in the change step g, so the rod 18 is more likely to roll out of the flipping cavity 15 under the action of gravity, and it is not easy for the rod 18 to get stuck in the flipping outlet 14.

[0052] In addition, as shown in variation step a, the space between the movable flap 16 and the fixed flap 17 is trapezoidal. If the two sides of the movable flap 16 cannot be raised and lowered independently, then when the movable flap 16 rises independently and approaches the fixed flap 17, there will still be a trapezoidal gap between the movable flap 16 and the fixed flap 17, resulting in an inability to stably clamp the rod 18, and also an inability to control the posture of the rod 18 during the flipping process. Moreover, when the rod 18 flips without being clamped, it will also generate a lot of noise.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reversible bar grinding system, characterized in that: The invention comprises a loading mechanism (1) for providing a bar material (18), a first processing machine tool (2) and a second processing machine tool (3) for grinding the bar material (18), and a ramp assembly for conveying the bar material (18); one side of the ramp assembly is a processing side, and the first processing machine tool (2) and the second processing machine tool (3) are both located on the processing side of the ramp assembly; the ramp assembly comprises a first feeding ramp (4), a second feeding ramp (5), a first conveying ramp (6) and a receiving ramp (7); The discharge end of the feeding mechanism (1) is connected to the first feeding ramp (4), the bar material (18) can roll along the first feeding ramp (4) to the first grinding station (8), and the first processing machine tool (2) can grind one end of the bar material (18) at the first grinding station (8); The discharge end of the first grinding station (8) is connected to the first conveying ramp (6), and the bar material (18) can roll along the first conveying ramp (6) into the turning mechanism (9), and the turning mechanism (9) can turn the unprocessed end of the bar material (18) to face the processing side; The discharge end of the turning mechanism (9) is connected to the second feeding ramp (5), the bar material (18) can roll along the second feeding ramp (5) to the second grinding station (10), and the second processing machine tool (3) can grind the other end of the bar material (18) at the second grinding station (10); The discharging end of the second grinding station (10) is connected to the material receiving ramp (7).

2. A reversible bar grinding system according to claim 1, characterized in that: The turning mechanism (9) comprises a disk-shaped box (11), a rotatable turning frame (12) is arranged in the disk-shaped box (11), a turning inlet (13) and a turning outlet (14) are respectively opened on opposite sides of the disk-shaped box (11), and the turning inlet (13) and the turning outlet (14) are respectively located on two sides of the rotating shaft of the turning frame (12); The turning frame (12) is provided with a turning cavity (15), and the two ends of the turning cavity (15) are provided with openings, and the two end openings of the turning cavity (15) are respectively closely attached to the inner walls of the disc-shaped box (11). During the turning process of the turning frame (12), the turning cavity (15) can be turned into a feeding posture and a discharging posture. In the feeding posture, the feeding end opening of the turning cavity (15) is connected to the turning inlet (13); in the discharging posture, the discharging end opening of the turning cavity (15) is connected to the turning outlet (14).

3. The reversible bar grinding system according to claim 2, characterized in that: Two flaps are arranged opposite to each other in the turnover cavity (15); in the feeding posture and the discharging posture of the turnover cavity (15), the upper and lower positions of the two flaps are interchanged; the flaps are inclined plates; in the feeding posture, the inclined upper end of the flap located at the bottom is connected to the turnover inlet (13); in the discharging posture, the inclined lower end of the flap located at the bottom is connected to the turnover outlet (14).

4. The reversible bar grinding system according to claim 3, characterized in that: The two flaps in the turnover cavity (15) are a movable flap (16) and a fixed flap (17). The fixed flap (17) is fixed in the turnover cavity (15). The movable flap (16) can be movably raised and lowered to approach or move away from the fixed flap (17), so that the movable flap (16) and the fixed flap (17) can cooperate to clamp or release the bar (18).

5. The reversible bar grinding system according to claim 4, characterized in that: In the feeding posture, the movable flap (16) is located below the fixed flap (17); the side of the movable flap (16) close to the flip inlet (13) and the side close to the flip outlet (14) can be raised and lowered separately, so that the tilting direction of the movable flap (16) can be changed, so that the bar material (18) can roll to the side where the flip inlet (13) is located after the movable flap (16) changes its tilting direction.

6. The reversible bar grinding system according to claim 2, characterized in that: A lifting mechanism (19) is also provided between the turning mechanism (9) and the second feeding ramp (5); the bar material (18) output by the turning mechanism (9) is lifted by the lifting mechanism (19) and then enters the second feeding ramp (5).

7. The reversible bar grinding system according to claim 6, characterized in that: The lifting mechanism (19) comprises a lifting box (20), wherein a vertical lifting channel is provided in the lifting box (20), and a lifting outlet (21) and a lifting inlet (22) are respectively arranged on the upper and lower sides of the lifting channel; the lifting outlet (21) is connected to the feeding end of the second feeding ramp (5), and the lifting inlet (22) is connected to the flip outlet (14) through the second conveying ramp (23); a liftable lifting plate (24) is provided in the lifting channel, and the lifting plate (24) is inclined; the lifting outlet (21) and the lifting inlet (22) are respectively located on the two sides of the lifting box (20), and the inclined lower end of the lifting plate (24) is close to the lifting outlet (21).

8. The reversible bar grinding system according to claim 1, characterized in that: The feeding mechanism (1) comprises a material storage bin (25), a rotatable feeding wheel disc (26) is arranged in the material storage bin (25), and a plurality of material holding grooves are distributed circumferentially on the edge of the feeding wheel disc (26); a feeding port (27) is arranged on the material storage bin (25), and when the feeding wheel disc (26) rotates, the plurality of material holding grooves on the feeding wheel disc (26) are alternately opposite to the feeding port (27).

9. The reversible bar grinding system according to claim 1, characterized in that: A first electromagnetic push rod (28) and a second electromagnetic push rod (29) are respectively provided at the bottom of the first feeding ramp (4) and the bottom of the second feeding ramp (5); the first electromagnetic push rod (28) can push the bar material (18) at the bottom of the first feeding ramp (4) to the first grinding station (8), and the second electromagnetic push rod (29) can push the bar material (18) at the bottom of the second feeding ramp (5) to the second grinding station (10).

10. A method for turning over a bar (18) in a turnable bar grinding system according to claim 5, characterized in that: The following steps are involved: Step S1: the turning cavity (15) is in a feeding posture, and the bar material (18) rolls into the turning cavity (15) from the turning inlet (13); Step S2: the turning frame (12) turns over until the feed end opening of the turning cavity (15) is offset from the turning inlet (13), and the movable turning plate (16) is still located below the fixed turning plate (17); Step S3: The side of the movable flap (16) close to the flip outlet (14) rises, and the tilting direction of the movable flap (16) is changed, so that the bar (18) rolls toward the side where the flip inlet (13) is located; Step S4: The side of the movable flap (16) close to the flip inlet (13) rises until the movable flap (16) cooperates with the fixed flap (17) to clamp the bar (18); Step S5: the turning frame (12) continues to turn over until the discharge end opening of the turning cavity (15) is connected to the turning outlet (14), at which time the upper and lower positions of the movable turning plate (16) and the fixed turning plate (17) are interchanged; Step S6: The movable flap (16) rises and resets and moves away from the fixed flap (17), so that the movable flap (16) and the fixed flap (17) release the rod (18), and the rod (18) rolls along the inclined fixed flap (17) under the action of gravity and rolls out of the flip mechanism (9) from the flip outlet (14).

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