Circular feeding equipment and feeding method suitable for shaft parts of centerless grinding machine

Abstract

The invention discloses a circular feeding device and method suitable for shaft parts of a centerless grinding machine. Comprising a rack, an upper-layer synchronous belt line assembly, an up-and-down material rotating device, a lower-layer synchronous belt line assembly, a push plate material ejecting device, a V-shaped synchronous belt material rotating machine, a feeding driving motor, a blowing air dryer, a second feeding V wheel, a material rotating in-place detection switch and a lower-layer arriving material detection switch. The double-sided tooth synchronous belt and the V-shaped synchronous belt are adopted as main conveying media, the conveying stability is guaranteed on the premise that the conveying precision is guaranteed, the upper and lower material rotating devices adopt a two-stage material pushing mode, the surfaces of ground workpieces can be protected on the premise of stable material pushing, the workpieces are prevented from being damaged by collision, and the working efficiency is improved. The special V-shaped feeding wheels are arranged in front of and behind the centerless grinding machine, so that the influence of an automatic receiving and feeding structure on the grinding machining precision of the centerless grinding machine is reduced, the interference of transmission power of a feeding port and a discharging port on grinding parts is reduced, and the precision of automatic grinding is improved.

Description

Technical Field

[0001] The invention relates to the technical field of centerless grinders, and in particular to a circulating feeding device and a feeding method for shaft parts suitable for centerless grinders. Background Art

[0002] A centerless grinder is a precision grinding device that is widely used in the field of mechanical processing. A centerless grinder does not require the axis of the workpiece to be positioned, and generally uses a grinding wheel to grind the workpiece. Its working principle is to use the geometric error of the grinding wheel when processing the part surface to control the processing center line, thereby achieving a precise processing effect. During the processing, the grinding wheel rotates at high speed for grinding, while the guide wheel rotates in the same direction at a slower speed, thereby driving the workpiece to rotate and perform circular feed. During through grinding, axial feed is achieved by adjusting the inclination angle of the guide wheel axis, and radial feed is achieved by moving the guide wheel frame or the grinding wheel frame during cut-in grinding.

[0003] At present, centerless grinders have an important position in the field of mechanical processing. Their high precision, high efficiency, high degree of automation and other characteristics make them an indispensable processing equipment in many fields. With the continuous improvement of industrial automation, CNC technology has gradually matured, and automatic loading and unloading, automatic measurement, and automatic screening of products have become the basic requirements of automated processing. On the premise of ensuring processing accuracy and efficiency, it is imperative to improve efficiency and intelligent upgrades through automation. The existing centerless grinders lack a loading device that can realize the cyclic grinding of shaft parts. Summary of the invention

[0004] The purpose of the present invention is to provide a circulating feeding device and a feeding method for shaft parts suitable for a centerless grinder, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a circulating feeding device for shaft parts of a centerless grinder, comprising a frame, the upper surface of the frame is fixedly connected with upper and lower support columns, the upper and lower support columns are fixedly connected with a lower synchronous belt line assembly, an upper synchronous belt line assembly is arranged on the top of the lower synchronous belt line assembly, and the upper synchronous belt line assembly is fixedly connected to the upper and lower support columns, an upper and lower material transfer device is arranged on one side of the lower synchronous belt line assembly, and a push plate ejecting device and a V-type synchronous belt feeder are arranged on the other side of the lower synchronous belt line assembly.

[0006] As a further technical solution of the present invention, the upper synchronous belt line assembly includes 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, an upper drive motor is arranged on one side of the upper double-sided tooth synchronous belt, and the output end of the upper drive motor is transmission-connected to the upper double-sided tooth synchronous belt, an upper transition plate is arranged on one side of the upper double-sided tooth synchronous belt, an upper material arrival detection switch is arranged on the upper transition plate, and the upper material arrival detection switch is fixedly connected to the frame.

[0007] As a further technical solution of the present invention, the upper and lower material transfer device includes a material pushing block and a material receiving block, and a synchronous material pushing cylinder and a material receiving double-axis cylinder are fixedly connected to the frame, 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-axis cylinder is fixedly connected to the material receiving block.

[0008] As a further technical solution of the present invention, the lower synchronous belt line assembly includes a lower driving motor, and the lower driving motor is fixedly connected to the frame, the output end of the lower driving motor is transmission-connected to the 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 frame, and the lower double-sided tooth synchronous belt is fixedly connected to a lower material arrival detection switch.

[0009] As a further technical solution of the present invention, the push plate pushing device includes a pushing plate, a material receiving transition plate is provided on one side of the pushing plate, a feed V-shaped synchronous belt is provided on one side of the material receiving transition plate, and both the material receiving transition plate and the feed V-shaped synchronous belt are fixedly connected to the frame.

[0010] As a further technical solution of the present invention, the V-type synchronous belt feeder includes a feed drive motor, and the feed drive motor is fixedly connected to the frame, the output end of the feed drive motor is fixedly connected to the feed V-type synchronous belt, and a feed detection switch is provided on one side of the feed drive motor, and the feed detection switch is fixedly connected to the frame.

[0011] As a further technical solution of the present invention, a V-type synchronous belt transfer machine is fixedly connected to the frame, a transfer drive motor is fixedly connected to the outer wall of one side of the V-type synchronous belt transfer machine, a second feed V-wheel and a transfer in place detection switch are fixedly connected to the V-type synchronous belt transfer machine, an air blowing dryer is arranged on one side of the V-type synchronous belt transfer machine, and the air blowing dryer is fixedly connected to the frame.

[0012] As a further technical solution of the present invention, a material transfer V-shaped synchronous belt is provided on one side of the air blowing dryer, a first feed V-wheel is provided on one side of the material transfer V-shaped synchronous belt, and both the material transfer V-shaped synchronous belt and the first feed V-wheel are fixedly connected to the frame.

[0013] The feeding method of the circulating feeding equipment for shaft parts of the centerless grinder includes the following steps: the first step is to evenly place the workpieces to be ground in the upper synchronous belt assembly discharge area on the upper and lower support columns of the circulating feeding equipment by manual placement before the grinding process begins. Different workpiece sizes can accommodate different quantities. Limited by the clamping manipulator, the distance D1 between each two workpieces is ≤12mm. Taking the workpiece with a diameter of D=Ø10mm and a length of L=330mm to be ground as an example, one cycle of grinding can accommodate about 50 workpieces; The second step is to start the equipment after the workpiece to be ground is placed. The PLC system controls the upper drive motor to drive the upper double-sided toothed synchronous belt to run D2 in the direction of the upper and lower transfer devices, where D2=(D1+D / 2)mm. The last part a1 to be ground passes through the upper material arrival detection switch, and the upper material arrival detection switch inputs the signal into the PLC system. The PLC system controls the dual-axis cylinder for receiving the material to be pushed out, and adjusts the receiving block to the state of waiting for receiving the material. At the same time, the synchronous ejecting cylinder is delayed and pushed out after t seconds, where t=the actual time when the part reaches the end of the upper double-sided toothed synchronous belt. After passing the upper material arrival detection switch, the part a1 slides over the upper transition plate to the upper double-sided toothed synchronous belt. At the end of the synchronous belt, the synchronous ejection cylinder is pushed out, and the ejection block is controlled to push part a1 upwards. Part a1 falls into the receiving position of the receiving block. The synchronous ejection cylinder is retracted after one second, and the ejection block is controlled to fall back below the upper transition plate, ready to push out the next part a2; after part a1 falls into the receiving position of the receiving block, the receiving double-axis cylinder is retracted, and part a1 is dropped through the lower transition plate and placed in the lower double-sided tooth synchronous belt discharge area. After the receiving double-axis cylinder is retracted for 1 second, the PLC system controls the lower drive motor to run D2 in the direction of the push plate ejection device. After 1 second, the receiving double-axis cylinder is pushed out, ready to receive the next part a2; this step is a single part up and down transfer cycle; Step 3: Repeat the cycle of the single workpiece up and down transfer in step 2 until part a1 reaches the lower synchronous belt line assembly, triggering the lower material arrival detection switch, stopping the cycle of step 2 and entering step 4; In the fourth step, the double-axis ejection cylinder inside the frame is normally in the retracted state. One second after part a1 reaches the triggering lower material arrival detection switch, the PLC system controls the double-axis ejection cylinder inside the frame to push out, and drives the ejection push plate to push part a1 into the receiving transition plate. One second later, the double-axis ejection cylinder inside the frame is retracted and ready for the next push-out; part a1 passes through the receiving transition plate and falls into the feeding V-type synchronous belt. After the V-type synchronous belt feeder is started, the feeding drive motor runs to drive the feeding V-type synchronous belt and maintains the running state. After part a1 falls into the feeding V-type synchronous belt, it passes through the feeding detection switch with the feeding V-type synchronous belt, triggering the feeding detection switch. , indicating that the feeding V-type synchronous belt is in a state of material, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejection cylinder inside the frame to prevent the ejection material from being pushed out; part a1 continues to run with the feeding V-type synchronous belt, enters the grinding area of ​​the centerless grinder, and starts grinding; at this time, part a1 leaves the detection area of ​​the feeding detection switch, and the signal is interrupted, indicating that there is no material, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejection cylinder inside the frame to push out, drive the ejection push plate to push part a2 into the material receiving transition plate and then fall into the feeding V-type synchronous belt, and then trigger the feeding detection switch accordingly, and this cycle is repeated; this step is a single part push plate transfer cycle; In the fifth step, part a1 enters the grinding area of ​​the centerless grinder. After the grinding is completed, the power of the centerless grinder enters the first feed V wheel at the feed end of the V-type synchronous belt transfer machine. After the V-type synchronous belt transfer machine equipment is started, it will operate normally. The transfer drive motor will run, and the drive sprocket will run, driving the transmission chain to transmit the power to the second feed V wheel, and at the same time, the power will be transmitted to the transfer V-type synchronous belt. The driven wheel of the transfer V-type synchronous belt drives the first feed V wheel to rotate through the chain drive. The rotation of the first feed V wheel drives part a1 into the transfer V-type synchronous belt. When part a1 triggers the detection switch in front of the air blow dryer, the PLC system controls the air blow dryer to start blowing and blow off part a1. Surface grinding fluid and impurities; when part a1 continues to move and leaves the detection area of ​​the detection switch, the PLC system controls the air blow dryer to stop blowing; part a1 continues to move and enters the second feeding V wheel. When it reaches the detection area of ​​the transfer detection switch, part a1 is restricted by the end limit structure and stops moving; the transfer detection switch feeds back the signal to the PLC system, and the PLC system controls the manipulator gripper of the centerless grinder to clamp part a1 out and put the workpiece back into the upper double-sided tooth synchronous belt discharge area of ​​the circulating feeding equipment. After placement is completed, the manipulator gripper returns to the top of the transfer detection switch to prepare for the next clamping, and this cycle is repeated; this step is a single part clamping and transfer cycle; Step 6: Repeat the above steps 1 to 5 until all the placed parts are ground once, check the grinding effect and size change, and prepare for the next cycle; this step is a single grinding cycle; In the seventh step, the sixth step is repeated until the part is ground to the required size, and the centerless grinder completes the cycle grinding.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts double-sided toothed synchronous belt and V-type synchronous belt as the main conveying medium, which ensures the stability of conveying under the premise of ensuring conveying accuracy, and the upper and lower transfer devices adopt a two-level pushing method, which can protect the surface of the ground workpiece under the premise of stable pushing and prevent the workpiece from being damaged. By arranging a special feeding V wheel before and after entering and exiting the centerless grinder, the influence of the automatic feeding and receiving structure on the grinding accuracy of the centerless grinder is reduced, the interference of the transmission power of the feed and discharge ports on the grinding parts is reduced, and the accuracy of automatic grinding is improved. The centralized integrated control is adopted to control the feeding and receiving control part. Concentrated in one control area, it is convenient for operation, debugging and later maintenance and repair. It is more beautiful and more convenient to operate while ensuring normal adjustment and use. The rear parts air blowing cleaning device effectively reduces the interference of impurities such as water stains on the operation of automated equipment. At the same time, the grinding fluid is retained inside the machine tool, reducing the impact of the grinding fluid on other structures of the equipment, reducing the equipment failure rate, and increasing the service life of the equipment. Sensor feedback signals and mechanical limits are used for each control link to ensure the safety of the equipment when the sensor fails or malfunctions. At the same time, centralized control also facilitates troubleshooting and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the upper synchronous belt line assembly of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the upper and lower material transfer device of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the lower synchronous belt line assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the push plate ejecting device of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the V-type synchronous belt feeder of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the V-type synchronous belt transfer machine of the present invention.

[0017] In the figure: 1. Frame; 2. Upper synchronous belt assembly; 3. Upper and lower material transfer device; 4. Lower synchronous belt assembly; 5. Push plate material ejection device; 6. V-type synchronous belt feeder; 7. V-type synchronous belt transfer machine; 8. Upper driving motor; 9. Upper double-sided tooth synchronous belt; 10. Upper transition plate; 11. Upper and lower support columns; 12. Upper material arrival detection switch; 13. Ejection block; 14. Receiving block; 15. Synchronous ejection cylinder; 16. Receiving double-axis cylinder ; 17. Lower layer drive motor; 18. Lower layer double-sided toothed synchronous belt; 19. Lower layer transition plate; 20. Top material push plate; 21. Material receiving transition plate; 22. Feed V-type synchronous belt; 23. Feed drive motor; 24. Feed detection switch; 25. Material transfer drive motor; 26. First feed V-wheel; 27. Material transfer V-type synchronous belt; 28. Air blow dryer; 29. ​​Second feed V-wheel; 30. Material transfer in place detection switch; 31. Lower layer material arrival detection switch. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Please refer to the attached Figure 1 -Attached Figure 7An embodiment of the present invention is as follows: a circulating feeding device for shaft parts of a centerless grinder comprises a frame 1, an upper surface of the frame 1 is fixedly connected with upper and lower support columns 11, a lower synchronous belt line assembly 4 is fixedly connected to the upper and lower support columns 11, an upper synchronous belt line assembly 2 is arranged at the top of the lower synchronous belt line assembly 4, and the upper synchronous belt line assembly 2 is fixedly connected to the upper and lower support columns 11, an upper and lower material transfer device 3 is arranged on one side of the lower synchronous belt line assembly 4, and a push plate ejecting device 5 and a V-type synchronous belt feeder 6 are arranged on the other side of the lower synchronous belt line assembly 4; 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, An upper driving motor 8 is arranged on one side of the upper double-sided toothed synchronous belt 9, and the output end of the upper driving motor 8 is transmission-connected to the upper double-sided toothed synchronous belt 9, an upper transition plate 10 is arranged on one side of the upper double-sided toothed synchronous belt 9, an upper material arrival detection switch 12 is arranged on the upper transition plate 10, and the upper material arrival detection switch 12 is fixedly connected to the frame 1, the upper driving motor 8 is used to drive the upper double-sided toothed synchronous belt 9, and the upper transition plate 10 is used for feeding transition of the upper double-sided toothed synchronous belt 9; the upper and lower material transfer devices 3 include a material ejecting block 13 and a material receiving block 14, a synchronous material ejecting cylinder 15 and a material receiving double-axis cylinder 16 are fixedly connected to the frame 1, and the output end of the synchronous material ejecting cylinder 15 is fixedly connected to the material ejecting block 13, and the material receiving double-axis cylinder The output end of 16 is fixedly connected to the material receiving block 14, the synchronous ejecting cylinder 15 is used to drive the ejecting block 13, and the receiving double-axis cylinder 16 is used to drive the receiving block 14; the lower synchronous belt line assembly 4 includes 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 transmission-connected with a lower double-sided toothed synchronous belt 18, and one end of the lower double-sided toothed 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 toothed synchronous belt 18 is fixedly connected with a lower material arrival detection switch 31, and the lower material arrival detection switch 31 is used for lower material arrival detection, and the lower driving motor 17 is used to drive the lower double-sided toothed synchronous belt 18; the push plate ejecting device 5 includes A material-receiving push plate 20 is provided on one side of the material-receiving push plate 20, a material-receiving transition plate 21 is provided on one side of the material-receiving transition plate 21, and the material-receiving transition plate 21 and the material-receiving V-shaped synchronous belt 22 are both fixedly connected to the frame 1, and the material-receiving transition plate 21 is used for material-receiving transition; the V-shaped synchronous belt feeder 6 includes a material-receiving drive motor 23, and the material-receiving drive motor 23 is fixedly connected to the frame 1, and the output end of the material-receiving drive motor 23 is fixedly connected to the material-receiving V-shaped synchronous belt 22, and a material-receiving detection switch 24 is provided on one side of the material-receiving drive motor 23, and the material-receiving detection switch 24 is fixedly connected to the frame 1, and the material-receiving detection switch 24 is used for material-receiving detection, and the material-receiving drive motor 23 is used to drive the material-receiving V-shaped synchronous belt 22;A V-type synchronous belt transfer machine 7 is fixedly connected to the frame 1, a transfer drive motor 25 is fixedly connected to one side outer wall of the V-type synchronous belt transfer machine 7, a second feed V wheel 29 and a transfer in place detection switch 30 are fixedly connected to the V-type synchronous belt transfer machine 7, a blow dryer 28 is arranged on one side of the V-type synchronous belt transfer machine 7, and the blow dryer 28 is fixedly connected to the frame 1, and the blow dryer 28 is used to blow away the grinding fluid and impurities on the surface of the parts; a transfer V-type synchronous belt 27 is arranged on one side of the blow dryer 28, a first feed V wheel 26 is arranged on one side of the transfer V-type synchronous belt 27, and the transfer V-type synchronous belt 27 and the first feed V wheel 26 are both fixedly connected to the frame 1, and the first feed V wheel 26 is used to feed the transfer V-type synchronous belt 27. ;

[0020] The above-mentioned feeding method of the circulating feeding equipment for shaft parts suitable for centerless grinders, first of all, the first step, before the grinding process starts, the workpiece to be ground is evenly placed in the upper synchronous belt line assembly 2 discharge area on the upper and lower support columns 11 in the circulating feeding equipment by manual placement. Different workpiece sizes can accommodate different quantities. Due to the limitation of the clamping manipulator, the distance D1 between each two workpieces is ≤12mm. Taking the workpiece with a diameter of D=Ø10mm and a length of L=330mm to be ground as an example, one cycle grinding can accommodate about 50 workpieces. The second step is to start the equipment after the workpiece to be ground is placed; the PLC system controls the upper The layer driving motor 8 drives the upper double-sided toothed synchronous belt 9 to run D2 in the direction of the upper and lower material transfer devices 3, where D2=(D1+D / 2)mm; the last part a1 to be ground passes through the upper material arrival detection switch 12, and the upper material arrival detection switch 12 inputs the signal into the PLC system, and the PLC system controls the material receiving double-axis cylinder 16 to push out, and adjusts the material receiving block 14 to the state of waiting for material receiving; at the same time, the delay control synchronous ejecting cylinder 15 is pushed out after t seconds, where t=the actual time when the part arrives at the end of the upper double-sided toothed synchronous belt 9, and the part a1 passes through the upper material arrival detection switch 12 and slides over the upper transition plate 10 to reach the end of the upper double-sided toothed synchronous belt 9 , the synchronous ejection cylinder 15 is pushed out, and the ejection block 13 is controlled to push the part a1 upwards, and the part a1 falls into the receiving position of the receiving block 14. The synchronous ejection cylinder 15 is retracted after one second, and the ejection block 13 is controlled to fall back below the upper transition plate 10, and the next part a2 is ready to be pushed out; after the part a1 falls into the receiving position of the receiving block 14, the receiving double-axis cylinder 16 is retracted, and the part a1 falls through the lower transition plate 19 and is placed in the discharge area of ​​the lower double-sided tooth synchronous belt 18. After the receiving double-axis cylinder 16 is retracted for 1 second, the PLC system controls the lower drive motor 17 to run D2 in the direction of the push plate ejection device 5. After 1 second, the receiving double-axis cylinder 16 is pushed out. Prepare to receive the next part a2; this step is a single part up and down material transfer cycle; the third step, repeat the second step of the single workpiece up and down material transfer cycle until the part a1 reaches the lower layer synchronous belt line assembly 4 to trigger the lower layer arrival detection switch 31, stop the second step of the cycle, and enter the fourth step; the fourth step, the double-axis ejection cylinder inside the frame 1 is normally in the retracted state, and one second after the part a1 reaches and triggers the lower layer arrival detection switch 31, the PLC system controls the double-axis ejection cylinder inside the frame 1 to push out, drive the ejection push plate 20 to push the part a1 into the material receiving transition plate 21, and after 1 second, the double-axis ejection cylinder inside the frame 1 is retracted to prepare for the next push;Part a1 passes through the material receiving transition plate 21 and falls into the feeding V-type synchronous belt 22. After the V-type synchronous belt feeder 6 is started, the feeding drive motor 23 runs to drive the feeding V-type synchronous belt 22 to keep the running state. After part a1 falls into the feeding V-type synchronous belt 22, it runs with the feeding V-type synchronous belt 22 and passes through the feeding detection switch 24, triggering the feeding detection switch 24, indicating that the feeding V-type synchronous belt 22 is in the material state at this time, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejecting cylinder inside the frame 1 not to push out the ejecting material; part a1 continues to run with the feeding V-type synchronous belt 22, enters the grinding area of ​​the centerless grinder, and starts grinding; at this time, part a1 leaves the detection area of ​​the feeding detection switch 24 , the signal is interrupted, indicating that there is no material, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejection cylinder inside the frame 1 to push out, drive the ejection push plate 20 to push part a2 into the material receiving transition plate 21 and then fall into the feeding V-type synchronous belt 22, and then trigger the feeding detection switch 24 accordingly, and this cycle is repeated; this step is a single part push plate material transfer cycle; the fifth step, part a1 enters the grinding area of ​​the centerless grinder and after the grinding is completed, it enters the first feeding V-wheel 26 at the feeding end of the V-type synchronous belt transfer machine 7 with the power of the centerless grinder. After the V-type synchronous belt transfer machine 7 equipment is started, it is in normal operation, the transfer drive motor 25 runs, the drive sprocket runs, and drives the transmission chain to transmit the power to the second feeding V-wheel 29, and at the same time The power is transmitted to the material transfer V-type synchronous belt 27, and the driven wheel of the material transfer V-type synchronous belt 27 drives the first feed V-wheel 26 to rotate through the chain drive. The rotation of the first feed V-wheel 26 drives the part a1 to enter the material transfer V-type synchronous belt 27. When the part a1 triggers the detection switch in front of the air blowing dryer 28, the PLC system controls the air blowing dryer 28 to start blowing, blowing off the grinding fluid and impurities on the surface of the part a1; when the part a1 continues to move and leaves the detection area of ​​the detection switch, the PLC system controls the air blowing dryer 28 to stop blowing; the part a1 continues to move and enters the second feed V-wheel 29. When it reaches the detection area of ​​the material transfer detection switch 30, the part a1 is restricted by the end limit structure and stops moving; the material transfer The in-place detection switch 30 feeds back the signal to the PLC system, and the PLC system controls the manipulator gripper of the centerless grinder to clamp the part a1, and put the workpiece back into the unloading area of ​​the upper double-sided tooth synchronous belt 9 of the circulating feeding device. After the placement is completed, the manipulator gripper returns to the top of the transfer in-place detection switch 30 to prepare for the next clamping, and this cycle is repeated; this step is a single part clamping and transfer cycle; the sixth step is to cycle the above first step to the fifth step until all the placed parts are ground once, and the grinding effect and size changes are detected to prepare for the next cycle; this step is a single grinding cycle; the seventh step is to cycle the sixth step until the part is ground to the required size, and the centerless grinder is completed through the cycle grinding. ;

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circulating feeding device for shaft parts suitable for a centerless grinder, 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 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 upper and lower material transfer device (3), and the other side of the lower synchronous belt line assembly (4) is provided with a push plate ejecting device (5) and a V-shaped synchronous belt feeder (6); The upper synchronous belt line assembly (2) comprises an upper double-sided toothed synchronous belt (9), and the upper double-sided toothed synchronous belt (9) is fixedly connected to the upper and lower support columns (11), an upper driving motor (8) is arranged on one side of the upper double-sided toothed synchronous belt (9), and the output end of the upper driving motor (8) is transmission-connected to the upper double-sided toothed synchronous belt (9), an upper transition plate (10) is arranged on one side of the upper double-sided toothed synchronous belt (9), an upper material arrival detection switch (12) is arranged on the upper transition plate (10), and the upper material arrival detection switch (12) is fixedly connected to the frame (1); The upper and lower material transfer device (3) comprises a material ejecting block (13) and a material receiving block (14); a synchronous material ejecting cylinder (15) and a material receiving double-axis cylinder (16) are fixedly connected to the frame (1); the output end of the synchronous material ejecting cylinder (15) is fixedly connected to the material ejecting block (13), and the output end of the material receiving double-axis cylinder (16) is fixedly connected to the material receiving block (14); The lower layer synchronous belt line assembly (4) comprises a lower layer driving motor (17), and the lower layer driving motor (17) is fixedly connected to the frame (1), the output end of the lower layer driving motor (17) is drivingly connected to a lower layer double-sided toothed synchronous belt (18), one end of the lower layer double-sided toothed synchronous belt (18) is provided with a lower layer transition plate (19), and the lower layer transition plate (19) is fixedly connected to the frame (1), and the lower layer double-sided toothed synchronous belt (18) is fixedly connected to a lower layer material arrival detection switch (31); The push plate material pushing device (5) comprises a material pushing plate (20), a material receiving transition plate (21) is arranged on one side of the material pushing plate (20), a material feeding V-shaped synchronous belt (22) is arranged on one side of the material receiving transition plate (21), and both the material receiving transition plate (21) and the material feeding V-shaped synchronous belt (22) are fixedly connected to the frame (1); The V-shaped synchronous belt feeder (6) comprises a feed drive motor (23), and the feed drive motor (23) is fixedly connected to the frame (1), the output end of the feed drive motor (23) is fixedly connected to the feed V-shaped synchronous belt (22), and a feed detection switch (24) is provided on one side of the feed drive motor (23), and the feed detection switch (24) is fixedly connected to the frame (1).

2. The circulating feeding device for shaft parts suitable for centerless grinder according to claim 1 is characterized in that: The frame (1) is fixedly connected to a V-shaped synchronous belt transfer machine (7), a transfer drive motor (25) is fixedly connected to an outer wall of one side of the V-shaped synchronous belt transfer machine (7), a second feed V wheel (29) and a transfer completion detection switch (30) are fixedly connected to the V-shaped synchronous belt transfer machine (7), and an air blowing dryer (28) is provided on one side of the V-shaped synchronous belt transfer machine (7), and the air blowing dryer (28) is fixedly connected to the frame (1).

3. The circulating feeding device for shaft parts suitable for centerless grinder according to claim 2 is characterized in that: A material transfer V-shaped synchronous belt (27) is provided on one side of the air-blowing dryer (28), a first material feed V-wheel (26) is provided on one side of the material transfer V-shaped synchronous belt (27), and both the material transfer V-shaped synchronous belt (27) and the first material feed V-wheel (26) are fixedly connected to the frame (1).

4. The feeding method of the circulating feeding equipment for shaft parts of the centerless grinder according to claim 3 is characterized in that: The first step is to evenly place the workpieces to be ground in the upper synchronous belt assembly (2) on the upper and lower support columns (11) of the cyclic loading device by manual placement before the grinding process begins. Different workpiece sizes can accommodate different numbers. Due to the limitation of the clamping manipulator, the distance D1 between each two workpieces is ≤12mm. Taking the workpiece with a diameter of D=Ø10mm and a length of L=330mm as an example, one cycle of grinding can accommodate about 50 workpieces. The second step is to start the equipment after the workpiece to be ground is placed. The PLC system controls the upper drive motor (8) to drive the upper double-sided toothed synchronous belt (9) to move D2 in the direction of the upper and lower material transfer device (3), where D2=(D1+D / 2) mm. The last part a1 to be ground passes through the upper material arrival detection switch (12). The upper material arrival detection switch (12) inputs a signal into the PLC system. The PLC system controls the material receiving double-axis cylinder (16) to push out and adjusts the material receiving block (14) to the material receiving state. At the same time, the synchronous ejecting cylinder (15) is delayed and controlled to be pushed out after t seconds, where t=the actual time when the part reaches the end of the upper double-sided toothed synchronous belt (9). After passing the upper material arrival detection switch (12), the part a1 slides over the upper transition plate (10) and reaches the end of the upper double-sided toothed synchronous belt (9). The synchronous ejecting cylinder (15) is pushed out, and the ejecting block (13) is controlled to push the part a1 upward, and the part a1 falls into the receiving position of the receiving block (14). The synchronous ejecting cylinder (15) is retracted after one second, and the ejecting block (13) is controlled to fall back below the upper transition plate (10), and is ready to push out the next part a2; after the part a1 falls into the receiving position of the receiving block (14), the receiving double-axis cylinder (16) is retracted, and the part a1 is dropped through the lower transition plate (19) and placed in the discharge area of ​​the lower double-sided tooth synchronous belt (18). After the receiving double-axis cylinder (16) is retracted for one second, the PLC system controls the lower driving motor (17) to run D2 in the direction of the push plate ejecting device (5), and after one second, the receiving double-axis cylinder (16) is pushed out, and is ready to receive the next part a2; this step is a single part up and down material transfer cycle; The third step is to repeat the second step of the single workpiece up and down material transfer cycle until the part a1 reaches the lower synchronous belt line assembly (4) and triggers the lower material arrival detection switch (31), stop the second step of the cycle, and enter the fourth step; In the fourth step, the double-axis ejection cylinder inside the frame (1) is normally in a retracted state. One second after the part a1 reaches the triggering lower material arrival detection switch (31), the PLC system controls the double-axis ejection cylinder inside the frame (1) to push out, driving the ejection push plate (20) to push the part a1 into the material receiving transition plate (21). One second later, the double-axis ejection cylinder inside the frame (1) is retracted and ready for the next push out; the part a1 passes through the material receiving transition plate (21) and falls into the feeding V-type synchronous belt (22). After the V-type synchronous belt feeder (6) is started, the feeding drive motor (23) runs to drive the feeding V-type synchronous belt (22) and maintains the running state. After the part a1 falls into the feeding V-type synchronous belt (22), it passes through the feeding detection switch (24) as the feeding V-type synchronous belt (22) runs, triggering the feeding V-type synchronous belt (22). The feed detection switch (24) is triggered, indicating that the feed V-shaped synchronous belt (22) is in a state of having material, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejection cylinder inside the frame (1) to not push out the ejection material; the part a1 continues to run with the feed V-shaped synchronous belt (22), enters the grinding area of ​​the centerless grinder, and starts grinding; at this time, the part a1 leaves the detection area of ​​the feed detection switch (24), and the signal is interrupted, indicating that there is no material, and the signal is fed back to the PLC system. The PLC system controls the double-axis ejection cylinder inside the frame (1) to push out, drives the ejection push plate (20) to push the part a2 into the material receiving transition plate (21) and then falls into the feed V-shaped synchronous belt (22), and then triggers the feed detection switch (24) accordingly, and this cycle is repeated; this step is a single part push plate transfer cycle; Step 5: After the part a1 enters the grinding area of ​​the centerless grinder and is ground, the power of the centerless grinder enters the first feed V wheel (26) at the feed end of the V-type synchronous belt transfer machine (7). After the V-type synchronous belt transfer machine (7) is started, it is in normal operation. The transfer drive motor (25) runs, the drive sprocket runs, and drives the transmission chain to transmit the power to the second feed V wheel (29), and at the same time transmits the power to the transfer V-type synchronous belt (27). The driven wheel of the transfer V-type synchronous belt (27) drives the first feed V wheel (26) to rotate through the chain drive. The rotation of the first feed V wheel (26) drives the part a1 to enter the transfer V-type synchronous belt (27). When the part a1 triggers the detection switch in front of the air blowing dryer (28), the PLC system controls the air blowing dryer (28). Start blowing to blow off the grinding fluid and impurities on the surface of part a1; when part a1 continues to move and leaves the detection area of ​​the detection switch, the PLC system controls the air blowing dryer (28) to stop blowing; part a1 continues to move and enters the second feeding V wheel (29), and when it reaches the detection area of ​​the material transfer detection switch (30), part a1 is restricted by the end limit structure and stops moving; the material transfer detection switch (30) feeds back a signal to the PLC system, and the PLC system controls the manipulator gripper of the centerless grinder to clamp part a1 out and put the workpiece back into the upper double-sided toothed synchronous belt (9) discharge area of ​​the circulating feeding equipment. After placement is completed, the manipulator gripper returns to the top of the material transfer detection switch (30) to prepare for the next clamping, and this cycle is repeated; this step is a single part clamping and material transfer cycle; Step 6: Repeat the above steps 1 to 5 until all the placed parts are ground once, check the grinding effect and size change, and prepare for the next cycle; this step is a single grinding cycle; In the seventh step, the sixth step is repeated until the part is ground to the required size, and the centerless grinder completes the cycle grinding.

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