Cyclic feeding device and method for shaft parts suitable for centerless grinding machine

Abstract

The application discloses a circulating feeding equipment and feeding method suitable for shaft parts of a centerless grinding machine, which comprises a rack, an upper synchronous belt line assembly, an up-and-down material transferring device, a lower synchronous belt line assembly, a push plate material lifting device, a V-shaped synchronous belt material transferring machine, a feeding driving motor, a blowing air dryer, a second feeding V wheel, a material transferring in-place detection switch and a lower material feeding detection switch; the application adopts double-sided tooth synchronous belts and V-shaped synchronous belts as main conveying media, guarantees the stability of conveying under the precondition of guaranteeing the conveying precision, adopts a two-stage material pushing mode of the up-and-down material transferring device, protects the surface of the ground workpiece under the precondition of stable material pushing, prevents the workpiece from being scratched, is provided with a special feeding V wheel before and after the centerless grinding machine, reduces the influence of the automatic material collecting and feeding structure on the grinding machining precision of the centerless grinding machine, reduces the interference generated by feeding and discharging transmission power on the ground parts, and improves the precision of automatic grinding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centerless grinding machine, and particularly relates to a circulating feeding equipment and a feeding method for shaft parts of a centerless grinding machine. BACKGROUND

[0002] The centerless grinding machine is a kind of precise grinding equipment, and is widely applied in the field of mechanical processing. The centerless grinding machine is a grinding machine without positioning the shaft center of a workpiece, and generally grinds the workpiece through a grinding wheel. The working principle is to control the machining center line by using the geometric error of the grinding wheel during the machining of the surface of the part, so as to achieve the precise machining effect. During the machining process, the grinding wheel rotates at high speed for grinding, and the guide wheel rotates at a slow speed in the same direction, so as to drive the workpiece to rotate for circumferential feeding. During the through grinding, the axial feeding is realized by adjusting the inclination angle of the guide wheel axis, and during the plunge grinding, the radial feeding is realized by moving the guide wheel frame or the grinding wheel frame.

[0003] At present, the centerless grinding machine plays an important role in the field of mechanical processing. Its characteristics of high precision, high efficiency and high automation degree make it an indispensable machining equipment in multiple fields. With the continuous improvement of industrial automation degree and the gradual maturity of numerical control technology, automatic feeding and discharging, automatic measurement and automatic screening have become the basic requirements of automatic machining. Under the premise of ensuring machining precision and efficiency, it is imperative to improve efficiency and intelligent upgrading through automation. The existing centerless grinding machine lacks a feeding equipment capable of realizing the circulating grinding of shaft parts. SUMMARY

[0004] The present application aims to provide a circulating feeding equipment and a feeding method for shaft parts of a centerless grinding machine to solve the problems in the background art.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a circulating feeding equipment for shaft parts of a centerless grinding machine, comprising a rack, an upper surface of the rack being fixedly connected with upper and lower support columns, the upper and lower support columns being fixedly connected with a lower synchronous belt line assembly, a top end of the lower synchronous belt line assembly being provided with an upper synchronous belt line assembly, the upper synchronous belt line assembly being fixedly connected to the upper and lower support columns, one side of the lower synchronous belt line assembly being provided with an up-down material transferring device, the other side of the lower synchronous belt line assembly being provided with a push plate material feeding device and a V-shaped synchronous belt feeder.

[0006] As a further technical scheme of the present application, the upper synchronous belt line assembly comprises an upper double-sided tooth synchronous belt, and the upper double-sided tooth synchronous belt is fixedly connected to the upper and lower support columns; one side of the upper double-sided tooth synchronous belt is provided with an upper driving motor, and the output end of the upper driving motor is drivingly connected to the upper double-sided tooth synchronous belt; one side of the upper double-sided tooth synchronous belt is provided with an upper transition plate, and the upper transition plate is provided with an upper material arrival detection switch, and the upper material arrival detection switch is fixedly connected to the rack.

[0007] As a further technical scheme of the present application, the upper and lower material transferring devices comprise a material pushing block and a material receiving block, and a synchronous material pushing cylinder and a material receiving double-shaft cylinder are fixedly connected to the rack, and the output end of the synchronous material pushing cylinder is fixedly connected to the material pushing block, and the output end of the material receiving double-shaft cylinder is fixedly connected to the material receiving block.

[0008] As a further technical scheme of the present application, the lower synchronous belt line assembly comprises a lower driving motor, and the lower driving motor is fixedly connected to the rack; the output end of the lower driving motor is drivingly connected to a lower double-sided tooth synchronous belt; one end of the lower double-sided tooth synchronous belt is provided with a lower transition plate, and the lower transition plate is fixedly connected to the rack; and a lower material arrival detection switch is fixedly connected to the lower double-sided tooth synchronous belt.

[0009] As a further technical scheme of the present application, the push plate material pushing device comprises a material pushing push plate, one side of the material pushing push plate is provided with a material receiving transition plate, one side of the material receiving transition plate is provided with an inlet V-shaped synchronous belt, and the material receiving transition plate and the inlet V-shaped synchronous belt are fixedly connected to the rack.

[0010] As a further technical scheme of the present application, the V-shaped synchronous belt feeder comprises an inlet driving motor, and the inlet driving motor is fixedly connected to the rack; the output end of the inlet driving motor is fixedly connected to the inlet V-shaped synchronous belt; one side of the inlet driving motor is provided with an inlet detection switch, and the inlet detection switch is fixedly connected to the rack.

[0011] As a further technical scheme of the present application, the rack is fixedly connected with a V-shaped synchronous belt material transferring machine, one side of the V-shaped synchronous belt material transferring machine is fixedly connected with a material transferring driving motor, a second inlet V-shaped wheel and a material transferring arrival detection switch are fixedly connected to the V-shaped synchronous belt material transferring machine, one side of the V-shaped synchronous belt material transferring machine is provided with a blowing air dryer, and the blowing air dryer is fixedly connected to the rack.

[0012] As a further technical scheme of the present application, one side of the blowing air dryer is provided with a material transferring V-shaped synchronous belt, one side of the material transferring V-shaped synchronous belt is provided with a first inlet V-shaped wheel, and the material transferring V-shaped synchronous belt and the first inlet V-shaped wheel are fixedly connected to the rack.

[0013] The feeding method of the cycle feeding equipment for shaft parts suitable for centerless grinding machine comprises the following steps: first, before the grinding process starts, the workpieces to be ground are placed on the upper layer synchronous belt line assembly feeding area on the upper and lower layer support columns in the cycle feeding equipment by manual placement, different workpiece sizes can accommodate different numbers, and the spacing between every two clamped workpieces is limited to D1≤12mm, taking the workpiece with a diameter D=Ø10mm and a length L=330mm as an example, about 50 workpieces can be accommodated in one cycle grinding;

[0014] Second, after the workpieces to be ground are placed, the equipment is started, the upper layer driving motor drives the upper layer double-sided tooth synchronous belt to run in the up-and-down material transfer device direction D2, wherein D2=(D1+D / 2)mm; the last workpiece a1 to be ground passes through the upper layer feeding detection switch, the upper layer feeding detection switch inputs a signal to the PLC system, the PLC system controls the receiving double-axle cylinder to push out, and adjusts the receiving block to the receiving state; at the same time, the synchronous feeding cylinder is controlled to push out after t seconds, wherein t=the actual part arrival time at the end of the upper layer double-sided tooth synchronous belt, after the part a1 passes through the upper layer feeding detection switch and slides through the upper layer transition plate to the end of the upper layer double-sided tooth synchronous belt, the synchronous feeding cylinder pushes out, controls the feeding block to push the part a1 upwards, the part a1 falls into the receiving block receiving position, the synchronous feeding cylinder is retracted after one second, controls the feeding block to fall back below the upper layer transition plate, and prepares to push out the next part a2; after the part a1 falls into the receiving block receiving position, the receiving double-axle cylinder retracts, and the part a1 falls through the lower layer transition plate and is placed in the lower layer double-sided tooth synchronous belt feeding area, the receiving double-axle cylinder is retracted after one second, the PLC system controls the lower layer driving motor to run in the push plate feeding device direction D2, the receiving double-axle cylinder is pushed out after one second, and is ready to receive the next part a2; this step is a single workpiece up-and-down material transfer cycle;

[0015] Third, repeat the single workpiece up-and-down material transfer cycle of the second step until the part a1 reaches the lower layer synchronous belt line assembly and triggers the lower layer feeding detection switch, the cycle of the second step is stopped, and the fourth step is entered;

[0016] The fourth step, the double-shaft lifting cylinder inside the rack is normally retracted, and the part a1 reaches the trigger lower layer to the material detection switch for one second. The PLC system controls the double-shaft lifting cylinder inside the rack to push out, drives the lifting push plate to push the part a1 into the material transition plate, and the double-shaft lifting cylinder inside the rack is retracted after one second, preparing for the next push out. The part a1 falls into the feeding V-shaped synchronous belt through the material transition plate, and the feeding V-shaped synchronous belt feeder runs after the equipment is started. The feeding drive motor drives the feeding V-shaped synchronous belt to keep running. After the part a1 falls into the feeding V-shaped synchronous belt, the part a1 runs through the feeding detection switch with the feeding V-shaped synchronous belt, triggers the feeding detection switch, and indicates that the feeding V-shaped synchronous belt is in a material state at this time. The signal is fed back to the PLC system, and the PLC system controls the double-shaft lifting cylinder inside the rack to be unable to push out the lifting. The part a1 continues to run with the feeding V-shaped synchronous belt, enters the grinding area of the centerless grinding machine, and starts grinding. At this time, the part a1 leaves the detection area of the feeding detection switch, the signal is interrupted, indicates that there is no material, the signal is fed back to the PLC system, the PLC system controls the double-shaft lifting cylinder inside the rack to push out, drives the lifting push plate to push the part a2 into the material transition plate, and the part a2 falls into the feeding V-shaped synchronous belt. The feeding detection switch is triggered accordingly, and the cycle is repeated. This step is a single part push plate material transfer cycle.

[0017] The fifth step, after the part a1 enters the grinding area of the centerless grinding machine and completes grinding, the part a1 enters the first feeding V-shaped wheel at the feeding end of the V-shaped synchronous belt transfer machine with the power of the centerless grinding machine. The V-shaped synchronous belt transfer machine is normally running after the equipment is started. The transfer drive motor drives the chain wheel to run, drives the transmission chain to transmit power to the second feeding V-shaped wheel, and simultaneously drives the transfer V-shaped synchronous belt. The transfer V-shaped synchronous belt is driven by the first feeding V-shaped wheel through the chain transmission. The first feeding V-shaped wheel drives the part a1 to enter the transfer V-shaped synchronous belt. When the part a1 triggers the detection switch in front of the air blowing and drying machine, the PLC system controls the air blowing and drying machine to start blowing and blows off the surface grinding liquid and impurities of the part a1. When the part a1 continues to move out of the detection area of the detection switch, the PLC system controls the air blowing and drying machine to stop blowing. The part a1 continues to move and enters the second feeding V-shaped wheel. When the part a1 reaches the detection area of the transfer to position detection switch, the part a1 is limited by the end limiting structure and stops moving. The transfer to position detection switch feeds back the signal to the PLC system. The PLC system controls the mechanical hand jaw of the centerless grinding machine to clamp out the part a1, and places the workpiece back into the double-sided tooth synchronous belt discharging area on the upper layer of the circulating feeding equipment. After the placement is completed, the mechanical hand jaw returns above the transfer to position detection switch, prepares for the next clamping, and the cycle is repeated. This step is a single part clamping and material transfer cycle.

[0018] The sixth step, the above first step to the fifth step is cycled until all the placed parts are ground once. The grinding effect and size change are detected to prepare for the next cycle. This step is a single grinding cycle.

[0019] The seventh step, the sixth step is cycled until the part is ground to the required size, and the centerless grinding machine is completed by type cycle grinding.

[0020] Compared with the prior art, the present application has the advantages that: the present application adopts double-sided tooth synchronous belt and V-shaped synchronous belt as the main conveying medium, which ensures the stability of the conveying under the premise of ensuring the conveying accuracy, and the upper and lower material turning devices adopt a two-stage pushing material mode, which can protect the surface of the ground workpiece under the premise of stable pushing material and prevent the workpiece from being scratched, by providing a special feeding V wheel before and after the centerless grinding machine, the influence of the automatic feeding structure on the centerless grinding machining accuracy is reduced, the interference of the feeding and discharging transmission power on the ground parts is reduced, the precision of the automatic grinding is improved, the centralized integrated control is adopted, the feeding and discharging control part is concentrated in one control area, which is convenient for operation, debugging and later maintenance and repair, is more beautiful under the premise of ensuring normal adjustment and use, is more convenient to operate, through the rear part blowing cleaning device, the interference of water stains and other impurities on the operation of the automatic equipment is effectively reduced, at the same time, the grinding fluid is retained in the machine tool, the influence of the grinding fluid on other structures of the equipment is reduced, the failure rate of the equipment is reduced, and the service life of the equipment is improved, and sensors feedback signals and mechanical limit forms are used for each control link, which ensures the safety of the equipment when the sensor fails and fails, and the centralized control also facilitates fault elimination and reduces maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the upper synchronous belt line assembly of the present application;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper and lower material turning device of the present application;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower synchronous belt line assembly of the present application;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the push plate material ejecting device of the present application;

[0027] Figure 6It is a perspective structure schematic diagram of the V-shaped synchronous belt feeding machine of the present application.

[0028] Figure 7 It is a perspective structure schematic diagram of the V-shaped synchronous belt feeding machine of the present application.

[0029] In the figure: 1, frame; 2, upper synchronous belt line assembly; 3, up-down feeding device; 4, lower synchronous belt line assembly; 5, push plate feeding device; 6, V-shaped synchronous belt feeding machine; 7, V-shaped synchronous belt feeding machine; 8, upper driving motor; 9, upper double-tooth synchronous belt; 10, upper transition plate; 11, upper and lower support column; 12, upper feeding detection switch; 13, feeding block; 14, receiving block; 15, synchronous feeding cylinder; 16, receiving double-shaft cylinder; 17, lower driving motor; 18, lower double-tooth synchronous belt; 19, lower transition plate; 20, feeding push plate; 21, receiving transition plate; 22, feeding V-shaped synchronous belt; 23, feeding driving motor; 24, feeding detection switch; 25, feeding driving motor; 26, first feeding V-shaped synchronous belt; 27, feeding V-shaped synchronous belt; 28, air blowing and drying machine; 29, second feeding V-shaped synchronous belt; 30, feeding detection switch; 31, lower feeding detection switch. DETAILED DESCRIPTION

[0030] In order to make the technical solutions of the embodiments of the present application more clear and the advantages more apparent, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to the drawings in the embodiments of the present application Figure 1 - the drawings in the embodiments of the present application Figure 7The application provides a circulating feeding device for shaft parts of a centerless grinding machine, which comprises a rack 1, an upper and lower support column 11 fixedly connected to the upper surface of the rack 1, a lower synchronous belt line assembly 4 fixedly connected to the upper and lower support column 11, an upper synchronous belt line assembly 2 arranged at the top of the lower synchronous belt line assembly 4 and fixedly connected to the upper and lower support column 11, an upper and lower material turning device 3 arranged on one side of the lower synchronous belt line assembly 4, a push plate material feeding device 5 and a V-shaped synchronous belt feeder 6 arranged on the other side of the lower synchronous belt line assembly 4, and the like.The V-shaped synchronous belt material rotating machine 7 is fixedly connected to the rack 1. A material rotating driving motor 25 is fixedly connected to one side outer wall of the V-shaped synchronous belt material rotating machine 7. A second feeding V-shaped wheel 29 and a material rotating in place detection switch 30 are fixedly connected to the V-shaped synchronous belt material rotating machine 7. A blowing air dryer 28 is arranged on one side of the V-shaped synchronous belt material rotating machine 7 and is fixedly connected to the rack 1. The blowing air dryer 28 is used for blowing off the grinding fluid and impurities on the surface of the part. A material rotating V-shaped synchronous belt 27 is arranged on one side of the blowing air dryer 28. A first feeding V-shaped wheel 26 is arranged on one side of the material rotating V-shaped synchronous belt 27. The material rotating V-shaped synchronous belt 27 and the first feeding V-shaped wheel 26 are fixedly connected to the rack 1. The first feeding V-shaped wheel 26 is used for feeding the material rotating V-shaped synchronous belt 27.

[0032] The feeding method of the cycle feeding equipment for shaft parts suitable for centerless grinding machines has the following steps. First, before the grinding process starts, the workpieces to be ground are placed on the upper layer of the synchronous belt line assembly 2 in the feeding area of the cycle feeding equipment by manual placement. Different workpiece sizes can accommodate different numbers, and the spacing between every two workpieces is limited to D1≤12 mm by the clamping robot. Taking the workpiece with a diameter D=Ø10 mm and a length L=330 mm as an example, about 50 workpieces can be accommodated in one cycle grinding. Second, after the workpieces to be ground are placed, the equipment is started, and the PLC system controls the upper layer driving motor 8 to drive the upper layer double-sided tooth synchronous belt 9 to run in the direction of the up-down material transfer device 3 by D2, where D2=(D1+D / 2) mm. The last workpiece a1 to be ground passes through the upper layer feeding detection switch 12, the upper layer feeding detection switch 12 inputs a signal to the PLC system, the PLC system controls the receiving double-shaft air cylinder 16 to push out, and adjusts the receiving block 14 to the receiving state. At the same time, the synchronous material pushing air cylinder 15 is controlled to push out after t seconds, where t is the actual time of the workpiece reaching the end of the upper layer double-sided tooth synchronous belt 9. After the workpiece a1 passes through the upper layer feeding detection switch 12 and slides through the upper layer transition plate 10 to the end of the upper layer double-sided tooth synchronous belt 9, the synchronous material pushing air cylinder 15 pushes out, controls the material pushing block 13 to push the workpiece a1 upwards, the workpiece a1 falls into the receiving position of the receiving block 14, and the synchronous material pushing air cylinder 15 is retracted after one second, controls the material pushing block 13 to fall back below the upper layer transition plate 10, and prepares to push out the next workpiece a2. After the workpiece a1 falls into the receiving position of the receiving block 14, the receiving double-shaft air cylinder 16 is retracted, the workpiece a1 falls through the lower layer transition plate 19 and is placed in the feeding area of the lower layer double-sided tooth synchronous belt 18, the receiving double-shaft air cylinder 16 is retracted after one second, the PLC system controls the lower layer driving motor 17 to run in the direction of the push plate material pushing device 5 by D2, the receiving double-shaft air cylinder 16 is pushed out after one second, and is ready to receive the next workpiece a2. This step is the single workpiece up-down material transfer cycle. Third, the single workpiece up-down material transfer cycle of the second step is repeated until the workpiece a1 reaches the lower layer feeding detection switch 31 to trigger the lower layer double-sided tooth synchronous belt assembly 4, the cycle of the second step is stopped, and the fourth step is entered. Fourth, the double-shaft material pushing air cylinder inside the rack 1 is normally retracted, one second after the workpiece a1 reaches the lower layer feeding detection switch 31 to trigger, the PLC system controls the double-shaft material pushing air cylinder inside the rack 1 to push out, drives the material pushing push plate 20 to push the workpiece a1 into the receiving transition plate 21, and the double-shaft material pushing air cylinder inside the rack 1 is retracted after one second, preparing for the next time.The part a1 falls into the feeding V-shaped synchronous belt 22 through the receiving transition plate 21. After the equipment is started, the feeding drive motor 23 operates to drive the feeding V-shaped synchronous belt 22 to keep running. After the part a1 falls into the feeding V-shaped synchronous belt 22, it runs through the feeding detection switch 24 to trigger the feeding detection switch 24, indicating that the feeding V-shaped synchronous belt 22 is in a state of having parts at this time. The signal is fed back to the PLC system. The PLC system controls the double-shaft ejection cylinder inside the rack 1 to be unable to push out the ejection. The part a1 continues to run with the feeding V-shaped synchronous belt 22 and enters the grinding area of the centerless grinding machine to start grinding. At this time, the part a1 leaves the detection area of the feeding detection switch 24, the signal is interrupted, indicating that there is no part, and the signal is fed back to the PLC system. The PLC system controls the double-shaft ejection cylinder inside the rack 1 to push out and drive the ejection push plate 20 to push the part a2 into the receiving transition plate 21 and then fall into the feeding V-shaped synchronous belt 22. The feeding detection switch 24 is triggered accordingly. This step is a single part push plate material transfer cycle. In the fifth step, after the part a1 enters the grinding area of the centerless grinding machine and completes grinding, it enters the first feeding V wheel 26 of the V-shaped synchronous belt transfer machine 7 feeding end with the running power of the centerless grinding machine. The V-shaped synchronous belt transfer machine 7 is in a normal state after being started. The transfer drive motor 25 operates to drive the chain wheel to run and drive the transmission chain to transmit power to the second feeding V wheel 29 and the transfer V-shaped synchronous belt 27. The driven wheel of the transfer V-shaped synchronous belt 27 drives the first feeding V wheel 26 to rotate. The first feeding V wheel 26 drives the part a1 to enter the transfer V-shaped synchronous belt 27. When the part a1 triggers the detection switch in front of the air blowing and drying machine 28, the PLC system controls the air blowing and drying machine 28 to start blowing to blow off the grinding liquid and impurities on the surface of the part a1. When the part a1 continues to move out of the detection area of the detection switch, the PLC system controls the air blowing and drying machine 28 to stop blowing. The part a1 continues to move and enters the second feeding V wheel 29. When it reaches the detection area of the transfer position detection switch 30, the part a1 is limited by the end limiting structure and stops moving. The transfer position detection switch 30 feeds back the signal to the PLC system. The PLC system controls the mechanical hand jaw of the centerless grinding machine to clamp out the part a1 and places the workpiece in the discharging area of the upper double-sided tooth synchronous belt 9 of the circulating feeding equipment. After the placement is completed, the mechanical hand jaw returns above the transfer position detection switch 30 to prepare for the next clamping. This step is a single part clamping and material transfer cycle. In the sixth step, the above first step to the fifth step is cycled until all the placed parts are ground once. The grinding effect and size change are detected to prepare for the next cycle. This step is a single grinding cycle. In the seventh step, the sixth step is cycled until the parts are ground to the required size. The centerless grinding machine completes the through-type cycle grinding.

[0033] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The device embodiments described above are only illustrative, wherein the units illustrated as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0035] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cyclic loading device for shaft parts suitable for use in a centerless grinding machine, comprising a frame (1), characterized in that: The upper surface of the frame (1) is fixedly connected with upper and lower support columns (11), the upper and lower support columns (11) are fixedly connected with a lower synchronous belt line assembly (4), the top end of the lower synchronous belt line assembly (4) is provided with an upper synchronous belt line assembly (2), and the upper synchronous belt line assembly (2) is fixedly connected to the upper and lower support columns (11), one side of the lower synchronous belt line assembly (4) is provided with an up-down material transferring device (3), and the other side of the lower synchronous belt line assembly (4) is provided with a push plate material pushing device (5) and a V-shaped synchronous belt feeder (6); The upper synchronous belt line assembly (2) comprises an upper double-sided tooth synchronous belt (9), and the upper double-sided tooth synchronous belt (9) is fixedly connected to the upper and lower support columns (11), one side of the upper double-sided tooth synchronous belt (9) is provided with an upper driving motor (8), and the output end of the upper driving motor (8) is drivingly connected to the upper double-sided tooth synchronous belt (9), one side of the upper double-sided tooth synchronous belt (9) is provided with an upper transition plate (10), and the upper transition plate (10) is provided with an upper material feeding detection switch (12), and the upper material feeding detection switch (12) is fixedly connected to the frame (1); The up-down material transferring device (3) comprises a material pushing block (13) and a material receiving block (14), the frame (1) is fixedly connected with a synchronous material pushing cylinder (15) and a material receiving double-shaft cylinder (16), and the output end of the synchronous material pushing cylinder (15) is fixedly connected to the material pushing block (13), and the output end of the material receiving double-shaft cylinder (16) is fixedly connected to the material receiving block (14); The lower synchronous belt line assembly (4) comprises a lower driving motor (17), and the lower driving motor (17) is fixedly connected to the frame (1), and the output end of the lower driving motor (17) is drivingly connected with a lower double-sided tooth synchronous belt (18), one end of the lower double-sided tooth synchronous belt (18) is provided with a lower transition plate (19), and the lower transition plate (19) is fixedly connected to the frame (1), and the lower double-sided tooth synchronous belt (18) is fixedly connected with a lower material feeding detection switch (31); The push plate material pushing device (5) comprises a material pushing push plate (20), one side of the material pushing push plate (20) is provided with a material receiving transition plate (21), one side of the material receiving transition plate (21) is provided with an inlet V-shaped synchronous belt (22), and the material receiving transition plate (21) and the inlet V-shaped synchronous belt (22) are fixedly connected to the frame (1); The V-shaped synchronous belt feeder (6) comprises an inlet driving motor (23), and the inlet driving motor (23) is fixedly connected to the frame (1), the output end of the inlet driving motor (23) is fixedly connected to the inlet V-shaped synchronous belt (22), one side of the inlet driving motor (23) is provided with an inlet detection switch (24), and the inlet detection switch (24) is fixedly connected to the frame (1).

2. The cyclic loading device for shaft parts suitable for centerless grinding machines according to claim 1, characterized in that: The rack (1) is fixedly connected with a V-shaped synchronous belt material rotating machine (7), one side outer wall of the V-shaped synchronous belt material rotating machine (7) is fixedly connected with a material rotating driving motor (25), the V-shaped synchronous belt material rotating machine (7) is fixedly connected with a second feeding V-shaped wheel (29) and a material rotating to position detection switch (30), one side of the V-shaped synchronous belt material rotating machine (7) is provided with a blowing air drying machine (28), and the blowing air drying machine (28) is fixedly connected on the rack (1).

3. The cyclic loading device for shaft-like parts suitable for use in a centerless grinding machine according to claim 2, characterized in that: One side of the blowing air drying machine (28) is provided with a material rotating V-shaped synchronous belt (27), one side of the material rotating V-shaped synchronous belt (27) is provided with a first feeding V-shaped wheel (26), and the material rotating V-shaped synchronous belt (27) and the first feeding V-shaped wheel (26) are both fixedly connected on the rack (1).

4. The loading method of the cyclic loading equipment for shaft parts applicable to the centerless grinding machine according to claim 3, characterized in that: First step, before grinding processing starts, the to-be-ground workpieces are placed on the upper layer synchronous belt line assembly (2) of the upper and lower layer support columns (11) in the feeding area by manual placement, different workpiece sizes can accommodate different numbers, and the spacing between every two workpieces is limited to D1≤12mm by the clamping mechanical hand, taking the workpiece with a diameter D=Ø10mm and a length L=330mm as an example, about 50 workpieces can be accommodated in one cycle of grinding; Second step, after the to-be-ground workpieces are placed, the equipment is started, the PLC system controls the upper layer driving motor (8) to drive the upper layer double-sided tooth synchronous belt (9) to run in the direction of the up and down material rotating device (3) by D2, wherein D2=(D1+D / 2)mm; the last to-be-ground part a1 passes through the upper layer material feeding detection switch (12), the upper layer material feeding detection switch (12) inputs a signal to the PLC system, the PLC system controls the receiving double-shaft air cylinder (16) to push out, and adjusts the receiving block (14) to a to-be-received state; at the same time, the synchronous material pushing air cylinder (15) is controlled to push out after t seconds, wherein t=the actual part arrival time at the end of the upper layer double-sided tooth synchronous belt (9), after the part a1 passes through the upper layer material feeding detection switch (12) and slides through the upper layer transition plate (10) to reach the end of the upper layer double-sided tooth synchronous belt (9), the synchronous material pushing air cylinder (15) pushes out, controls the material pushing block (13) to push the part a1 upwards, the part a1 falls into the receiving position of the receiving block (14), the synchronous material pushing air cylinder (15) is retracted after one second, controls the material pushing block (13) to fall back below the upper layer transition plate (10), and prepares to push out the next part a2; after the part a1 falls into the receiving position of the receiving block (14), the receiving double-shaft air cylinder (16) is retracted, the part a1 falls through the lower layer transition plate (19) and is placed in the feeding area of the lower layer double-sided tooth synchronous belt (18), the receiving double-shaft air cylinder (16) is retracted after one second, the PLC system controls the lower layer driving motor (17) to run in the direction of the push plate material pushing device (5) by D2, the receiving double-shaft air cylinder (16) is pushed out after one second, and the next part a2 is prepared to be received; this step is a single part up and down material rotating cycle; Third step, the single workpiece up and down material rotating cycle of the second step is repeated until the part a1 reaches the lower layer synchronous belt line assembly (4) and triggers the lower layer material feeding detection switch (31), the second cycle is stopped, and the fourth step is entered. The fourth step is that the double-shaft ejection cylinder inside the rack (1) is normally retracted, and the part a1 reaches the trigger lower layer material detection switch (31) after one second. The PLC system controls the double-shaft ejection cylinder inside the rack (1) to push out, drives the ejection push plate (20) to push the part a1 into the material receiving transition plate (21), and the double-shaft ejection cylinder inside the rack (1) is retracted after one second, preparing for the next push out. The part a1 falls into the feeding V-shaped synchronous belt (22) through the material receiving transition plate (21). The V-shaped synchronous belt feeder (6) runs after the equipment is started, drives the feeding V-shaped synchronous belt (22), keeps running, and the part a1 falls into the feeding V-shaped synchronous belt (22) and runs with the feeding V-shaped synchronous belt (22) through the feeding detection switch (24), triggers the feeding detection switch (24), indicating that the feeding V-shaped synchronous belt (22) is in a material state at this time, feeds the signal to the PLC system, and the PLC system controls the double-shaft ejection cylinder inside the rack (1) to be unable to push out the ejection. The part a1 continues to run with the feeding V-shaped synchronous belt (22) and enters the centerless grinding machine grinding area to start grinding. At this time, the part a1 leaves the detection area of the feeding detection switch (24), the signal is interrupted, indicating that there is no material, feeds the signal to the PLC system, and the PLC system controls the double-shaft ejection cylinder inside the rack (1) to push out, drives the ejection push plate (20) to push the part a2 into the material receiving transition plate (21) and fall into the feeding V-shaped synchronous belt (22), and then trigger the feeding detection switch (24) accordingly, to form a cycle. This step is a single part push plate material transfer cycle. The fifth step, after the part a1 enters the grinding area of the centerless grinding machine and is ground to completion, it enters the first feeding V wheel (26) of the V-shaped synchronous belt material transfer machine (7) through the power of the centerless grinding machine. The V-shaped synchronous belt material transfer machine (7) is in normal operation after starting, and the material transfer driving motor (25) operates to drive the chain wheel, which drives the transmission chain to transmit power to the second feeding V wheel (29) and the material transfer V-shaped synchronous belt (27). The driven wheel of the material transfer V-shaped synchronous belt (27) drives the first feeding V wheel (26) to rotate through chain transmission, and the first feeding V wheel (26) drives the part a1 to enter the material transfer V-shaped synchronous belt (27). When the part a1 triggers the detection switch in front of the air blowing and drying machine (28), the PLC system controls the air blowing and drying machine (28) to start blowing, and blows off the surface grinding fluid and impurities of the part a1. When the part a1 continues to move out of the detection area of the detection switch, the PLC system controls the air blowing and drying machine (28) to stop blowing. The part a1 continues to move and enters the second feeding V wheel (29). When it reaches the detection area of the material transfer in-place detection switch (30), the part a1 is limited by the end limiting structure and stops moving. The material transfer in-place detection switch (30) feeds back the signal to the PLC system, and the PLC system controls the mechanical hand clamp of the centerless grinding machine to clamp out the part a1, and places the workpiece on the upper double-sided tooth synchronous belt (9) of the circulating feeding equipment. After the placement is completed, the mechanical hand clamp returns to above the material transfer in-place detection switch (30) to prepare for the next clamping. The above steps are repeated to clamp and transfer the single part. The sixth step is to repeat the first to fifth steps until all the placed parts are ground once. The grinding effect and size change are detected to prepare for the next cycle. This step is a single grinding cycle. The seventh step is to repeat the sixth step until the part is ground to the required size. The centerless grinding machine completes the through-type cycle grinding.

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