A kind of workpiece automatic feeding device and feeding method thereof

Abstract

The present invention provides an automatic workpiece feeding device and a feeding method thereof, comprising a material bin, a material guide plate with a slope arranged in the material bin, and a material drop hole arranged on a material table; a material pushing assembly is used to push the workpieces in the material bin out of the material bin one by one at a set rhythm, and the material pushing assembly comprises a first material pushing member and a second material pushing member installed from bottom to top, and the first material pushing member and the second material pushing member alternately push the workpieces in the material bin out of the material bin. The first material pushing member comprises a first driving member and a first pushing plate connected in a driving manner, and a first material hole and a second material hole are arranged on the first pushing plate; the second material pushing member comprises a second driving member and a second pushing plate connected in a driving manner, and a third material hole and a fourth material hole are arranged on the second pushing plate, and the second driving member drives the second pushing plate to translate closely against the first pushing plate, so that the fourth material hole is alternately aligned with the first material hole and the second material hole, and the third material hole is intermittently aligned with the first material hole. The first material pushing member and the second material pushing member of the present invention alternately feed materials, which can improve the feeding efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment, and in particular relates to an automatic workpiece feeding device and a feeding method thereof. Background Art

[0002] In automated production lines, cylindrical workpieces are usually loaded using robots, fixtures or cylinder pushers. Although robots and fixtures have high loading accuracy, the equipment cost is high and the loading efficiency is average.

[0003] The cylinder loading method can refer to the patent document with publication number CN108673113A, which records the installation mechanism of the fire extinguisher handle guide tube, including a workbench with a material bin, the material bin includes a storage trough with a sloped structure at the bottom and a single-tube guide trough vertically connected to the lowest point of the slope, a push plate driven by a horizontal cylinder and in direct contact with the guide tube is arranged on the rear side of the single-tube guide trough, a single-tube feeding baffle is hinged on the bottom of the front panel of the single-tube guide trough, a lifting limit plate is arranged at intervals on the front side of the single-tube feeding baffle, and a tube twisting area is formed between the lifting limit plate and the single-tube feeding baffle. This invention uses the cooperation of the cylinder and the push plate to push out the single guide tube located at the bottom of the single-tube guide trough, and then reach the tube twisting area after passing the single-tube feeding baffle. After that, the push plate and the single-tube feeding baffle return to their original positions. Since the cylinder needs to extend and retract for each beat, it is necessary to wait until the cylinder is fully retracted before the next loading can be carried out. Each movement of the cylinder takes a long time, and the loading efficiency needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide an automatic workpiece feeding device to improve the feeding efficiency of cylindrical workpieces.

[0005] The present invention provides the following technical solutions:

[0006] A workpiece automatic feeding device, comprising:

[0007] A material bin, the material bin is fixed on the material platform, a material guide plate with a slope is arranged in the material bin, and the material guide plate guides the cylindrical workpiece to the upper material side; a drop hole adapted to the workpiece is arranged on the material platform near the upper material side;

[0008] The pusher assembly is used to push the workpieces in the bin out of the bin one by one at a set rhythm. The pusher assembly includes a first pusher and a second pusher installed from bottom to top. The first pusher and the second pusher push the workpieces in the bin out of the bin alternately, wherein:

[0009] The first pusher comprises a first driving member and a first push plate connected in a driving manner, a first material hole and a second material hole adapted to the workpiece are arranged on the first push plate at intervals along the X-axis direction, and the first driving member drives the first push plate to move in parallel with the material table along the X-axis direction, so that the second material hole and the first material hole are alternately aligned with the blanking hole on the material table;

[0010] The second pushing member comprises a second driving member and a second pushing plate connected in a driving manner, a third material hole and a fourth material hole adapted to the workpiece are arranged at intervals along the X-axis direction on the second pushing plate, and the third material hole and the fourth material hole are both located on the loading side of the silo; the second driving member drives the second pushing plate to translate closely against the first pushing plate, so that the fourth material hole is alternately aligned with the first material hole and the second material hole, and the third material hole is intermittently aligned with the first material hole;

[0011] The workpiece can slide from the material bin to the third material hole or the fourth material hole, and then roll into the drop hole from the first material hole and the fourth material hole respectively;

[0012] The material bin is provided with an avoidance groove for the first push plate and the second push plate to move.

[0013] Preferably, an upwardly protruding limit block is provided at one end of the first push plate away from the first driving member, and when the second driving member drives the fourth material hole of the second push plate to align with the second material hole, the limit block physically limits the second push plate.

[0014] Preferably, the lower end of the material guide plate is located upstream of the third material hole and close to the third material hole.

[0015] Preferably, a photoelectric sensor is installed on the top wall of the silo, and two of the photoelectric sensors are respectively located directly above the third material hole and the fourth material hole to detect whether there are workpieces in the third material hole and the fourth material hole.

[0016] Furthermore, the workpiece automatic feeding device also includes:

[0017] The guiding assembly is used to guide the workpiece falling from the blanking hole in a horizontal state to a vertical state, and the guiding assembly includes:

[0018] A slide plate, wherein the slide plate is fixed obliquely in a YZ plane just below the blanking hole;

[0019] A follower wheel is rotatably mounted on the bottom end of the slide plate, the axial direction of the follower wheel extends along the X-axis direction, and the follower wheel is eccentrically connected to the rotating shaft; in an initial state, the proximal axis side of the follower wheel is close to the slide plate and protrudes from the slide plate, and during the sliding of the workpiece on the slide plate, the follower wheel rotates due to rolling friction with the workpiece, so that the distal axis side of the follower wheel gradually protrudes from the slide plate to change the support angle of the workpiece, and the workpiece is guided to a vertical state;

[0020] The conveyor belt is located downstream of the follower wheel and is used for receiving and conveying the workpiece after being guided by the follower wheel.

[0021] Preferably, a circle of arc-shaped limiting grooves adapted to the workpiece is provided on the circumference of the follower wheel, and the limiting grooves are concave at the axial center of the follower wheel.

[0022] Preferably, the slide plate is also provided with a guide groove adapted to the workpiece, and the workpiece slides downward along the guide groove.

[0023] Furthermore, the rotating shaft is installed on the bracket, and a proximity switch is installed on the bracket for braking the follower wheel and resetting it to an initial state, and a sensing sheet is installed on the proximal axis side of the follower wheel; an electromagnet is also installed on the bracket, and the proximity switch is connected to a controller, and the controller is connected to the electromagnet; an iron sheet and a tension spring are installed on the follower wheel, and the tension spring is fixed on the follower wheel, and the other end of the tension spring is welded to the iron sheet; when the proximity switch senses the sensing sheet, the iron sheet faces the electromagnet, and the controller energizes the electromagnet to absorb the iron sheet, so that the follower wheel stops rotating; a photoelectric switch connected to the controller is installed on the slide, and the photoelectric switch is used to detect whether the next workpiece reaches the slide, so as to cut off the power of the electromagnet.

[0024] Preferably, the conveyor belt is a chain plate conveyor belt, and a plurality of annular ribs for positioning the workpieces are provided on the conveyor belt at intervals along the running direction of the conveyor belt, and the conveyor belt moves the ribs sequentially to face the slide plate.

[0025] The present invention also provides a loading method for the above-mentioned automatic workpiece loading device, comprising the following steps:

[0026] In the initial state, the second material hole of the first push plate is aligned with the material drop hole of the material platform, and the fourth material hole of the second push plate is aligned with the first material hole of the first push plate;

[0027] Put multiple cylindrical workpieces horizontally into the material bin, and the workpieces roll down to the loading side along the material guide plate, and three of the workpieces roll into the third material hole, the fourth material hole and the first material hole respectively;

[0028] The first driving member drives the first push plate to extend so that the first material hole is aligned with the blanking hole, and the workpiece enters the blanking hole;

[0029] When the first driving member retracts the first push plate, the second driving member extends the second push plate until the first push plate is reset, and the fourth material hole is aligned with the second material hole, and the workpiece in the fourth material hole passes through the second material hole and falls into the drop hole; at this time, the first material hole is aligned with the third material hole, and the workpiece in the silo enters the third material hole and the first material hole for temporary storage;

[0030] The first driving member extends the first push plate again, causing the workpiece in the first material hole to fall into the drop hole; at the same time, the second driving member resets the second push plate, causing the workpiece in the bin to roll into the fourth material hole;

[0031] The first driving member retracts the first push plate again, and at this time, the first push plate and the second push plate both return to their initial states, and the above steps are repeated to continuously load the workpiece.

[0032] Furthermore, after the workpiece falls from the blanking hole, a step of guiding the workpiece is also included, which step includes:

[0033] The workpiece falls from the blanking hole onto the slide plate and slides along the slide plate to the bottom end of the slide plate;

[0034] In the initial state, the proximal side of the follower wheel slightly protrudes from the slide plate, and the workpiece continues to slide downward due to rolling friction between the follower wheel and the slide plate. As the distal side of the follower wheel gradually protrudes from the slide plate, the workpiece is supported by the follower wheel at a larger angle and tends to be in an upright state.

[0035] The workpiece is blocked by the retaining wall outside the frame of the conveyor belt and then completely falls onto the conveyor belt, which intermittently carries the workpiece forward;

[0036] The follower wheel continues to rotate under the action of inertia until the proximity switch detects the induction sheet. The controller then energizes the electromagnet to absorb the iron sheet on the follower wheel, causing the follower wheel to stop rotating. At this time, the follower wheel is reset to its initial state, with its proximal side slightly protruding from the slide plate.

[0037] When the photoelectric switch detects that the next workpiece slides onto the slide, the controller cuts off the power to the electromagnet, stretches the spring to pull back the iron sheet, and releases the brake on the follower wheel;

[0038] Repeat the above steps to guide the workpiece.

[0039] The beneficial effects of the present invention are:

[0040] The present invention utilizes the first pushing member and the second pushing member to alternately push the cylindrical workpiece into the blanking hole, thereby reducing the working time of waiting for the driving member to reciprocate and improving the feeding efficiency.

[0041] The first pusher and the second pusher of the present invention are respectively provided with two material holes. By utilizing the distribution positions of the material holes and the action sequence of the first pusher and the second pusher, the two groups of pushers can push materials alternately, and the feeding action is reliable and the rhythm is orderly.

[0042] The guiding assembly of the present invention further guides the workpiece dropped from the blanking hole from a horizontal state to a vertical state, so as to facilitate the assembly of the workpiece in the next process. The guiding assembly includes a slide plate and an eccentrically mounted follower wheel, and utilizes the gravity of the workpiece and the rolling friction of the follower wheel to gradually bulge the far-axis side of the follower wheel to change the inclination angle of the workpiece, so that the workpiece tends to slide upright onto the conveyor belt. The guiding assembly can automatically change the posture of the workpiece without a driving part, which reduces the number of driving parts used, making the equipment more compact and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 It is a schematic diagram of the structure of the present invention;

[0045] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0046] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0047] Figures 4 to 7 It is a schematic diagram of the action process of the pusher assembly of the present invention;

[0048] Figure 8 is a schematic side view of the guide assembly of the present invention;

[0049] Figures 9 to 12 It is a schematic diagram of the action process of the guiding assembly of the present invention when guiding the workpiece.

[0050] Markings in the figure are: 1. Material table; 2. Material bin; 3. Workpiece; 4. Material guide plate; 5. Loading side; 6. Material drop hole; 7. First material pusher; 8. Second material pusher; 9. First driving member; 10. First push plate; 11. Second driving member; 12. Second push plate; 13. First material hole; 14. Second material hole; 15. Third material hole; 16. Fourth material hole; 17. Avoidance groove; 18. Limit block; 19. Photoelectric sensor; 20. Slide plate; 21. Follower wheel; 22. Conveyor belt; 23. Guide groove; 24. Rotating shaft; 25. Bracket; 26. Limit groove; 27. Retaining wall; 28. Retaining edge; 29. ​​Proximity switch; 30. Induction sheet; 31. Electromagnet; 32. Iron sheet; 33. Tension spring; 34. Spring groove; 35. Guide column; 36. Photoelectric switch. DETAILED DESCRIPTION

[0051] Example 1

[0052] like Figure 1 , Figures 4 to 7 As shown, an automatic workpiece feeding device includes: a material table 1, a material bin 2 and a material pushing component.

[0053] The material table 1 is supported by a base, and the material bin 2 is fixed on the material table 1. The material bin 2 can accommodate dozens to dozens of cylindrical workpieces 3. A sloped material guide plate 4 is provided in the material bin 2, and the workpiece 3 rolls down along the material guide plate 4 to the loading side 5 on the right side of the material bin. A drop hole 6 adapted to the workpiece 3 is provided on the right side of the material table 1, and the workpiece 3 falls from the drop hole 6 to the next conveying mechanism.

[0054] The pusher assembly is used to push the workpieces in the silo 2 out of the silo 2 one by one at a set rhythm, so as to realize automatic and orderly loading. The pusher assembly includes a first pusher 7 and a second pusher 8 installed from bottom to top, and the first pusher 7 and the second pusher 8 alternately push the workpieces 3 in the silo 2 out of the silo 2, wherein:

[0055] The first push member 7 includes a first driving member 9 and a first push plate 10 which are drive-connected. The first driving member 9 is installed on the material table 2. The first material holes 13 and the second material holes 14 which are adapted to the workpiece are arranged at intervals along the X-axis direction on the first push plate 10. The first driving member 9 drives the first push plate 10 to translate along the X-axis direction in conjunction with the material table 2 so that the second material holes 14 and the first material holes 13 are alternately aligned with the blanking holes 6 on the material table.

[0056] The second pushing member 8 includes a second driving member 11 and a second pushing plate 12 which are drive-connected. The second driving member 11 is installed above the first driving member 9. The second pushing plate 12 is provided with a third material hole 15 and a fourth material hole 16 adapted to the workpiece at intervals along the X-axis direction. The third material hole 15 and the fourth material hole 16 are both close to the loading side of the silo 2. The second driving member 11 drives the second pushing plate 12 to translate closely against the first pushing plate 10, so that the fourth material hole 16 is alternately aligned with the first material hole 13 and the second material hole 14, and the third material hole 15 is intermittently aligned with the first material hole 13.

[0057] The workpiece 3 can slide from the material bin 2 into the third material hole 15 or the fourth material hole 16 , and then roll into the drop hole 6 from the first material hole 13 and the fourth material hole 16 , respectively.

[0058] The lower end of the guide plate 4 is located upstream of the third material hole 15 and close to the third material hole 15, so the workpiece rolling down from the guide plate 4 is more likely to roll into the third material hole 15. When the third material hole 15 is full, the workpiece 3 can roll forward freely to the fourth material hole 16 and the first material hole 13 under the thrust of the workpiece behind.

[0059] The first driving member 9 and the second driving member 11 can be cylinders.

[0060] The left and right sides of the silo 2 are respectively provided with avoidance grooves 17 for the first push plate 10 and the second push plate 12 to move.

[0061] An upwardly protruding limit block 18 is provided at one end of the first push plate 10 away from the first driving member 9. When the second driving member 11 drives the fourth material hole 16 of the second push plate to align with the second material hole 14, the limit block 18 physically limits the second push plate 12 to ensure that the fourth material hole 16 is aligned with the second material hole 14 and the third material hole 15 is aligned with the first material hole 13.

[0062] Photoelectric sensors 19 are installed on the top wall of the silo 2. Two photoelectric sensors 19 are respectively located directly above the third material hole 15 and the fourth material hole 16 to detect whether there are workpieces in the third material hole 15 and the fourth material hole 16. An alarm is also installed outside the silo 2. The photoelectric sensors 19 are connected to the controller, and the controller is connected to the alarm. When there is a lack of material in the third / fourth material hole, the photoelectric sensor triggers the alarm to remind the operator to add material.

[0063] The feeding process of this automatic feeding device is as follows:

[0064] like Figure 1 As shown, in the initial state, the second material hole 14 of the first push plate 10 is aligned with the material hole 6 of the material platform, and the fourth material hole 16 of the second push plate is aligned with the first material hole 13 of the first push plate;

[0065] A stack of cylindrical workpieces 3 is placed horizontally in the hopper 2, and the workpieces 3 are rolled down to the loading side 5 along the guide plate 4, and three workpieces are rolled into the third material hole 15, the fourth material hole 16 and the first material hole 13 respectively;

[0066] like Figure 4 As shown, the first driving member 9 drives the first push plate 10 to extend, so that the first material hole 13 is aligned with the blanking hole 6, and the workpiece in the first material hole 13 enters the blanking hole 6;

[0067] like Figure 5 and Figure 6 As shown, the first driving member 9 retracts the first push plate 10, and during this process, the second driving member 11 extends out of the second push plate 12 until the first push plate 10 is reset, and the fourth material hole 16 is aligned with the second material hole 14, and the workpiece in the fourth material hole 16 passes through the second material hole 14 and falls into the drop hole 6; at this time, the first material hole 13 is aligned with the third material hole 15, and the workpiece in the silo 2 rolls into the third material hole 15 and the first material hole 13 for temporary storage;

[0068] like Figure 7 As shown, the first driving member 9 extends the first push plate 10 again, causing the workpiece in the first material hole 13 to fall into the drop hole 6; at the same time, the second driving member 11 resets the second push plate 12, and the workpiece in the bin rolls into the fourth material hole 16;

[0069] The first driving member 9 retracts the first push plate 10 again, and at this time, the first push plate 10 and the second push plate 12 return to the initial state. Repeat the above steps to continuously load the workpiece.

[0070] Example 2

[0071] In the assembly process of some workpieces, it is not only necessary to load the workpieces one by one according to the set beat, but also to keep the workpieces in an upright posture to facilitate the assembly of other parts at the end of the workpiece, and to prevent the workpieces from rolling freely during the transfer and assembly process, so as to improve the assembly efficiency and accuracy. Therefore, this embodiment is further configured with a guiding assembly on the basis of embodiment 1, which is used to guide the workpieces that fall from the blanking hole in a horizontal state to a vertical state.

[0072] like Figure 2 , 3 , Figures 8 to 12 As shown, the positive assembly includes: a slide plate 20, a follower wheel 21 and a conveyor belt 22.

[0073] The slide plate 20 is fixed obliquely in the YZ plane just below the blanking hole 6. Figure 8 As shown, the slide plate 20 is tilted forward. A guide groove 23 adapted to the workpiece is provided on the slide plate 20, and the workpiece 3 slides downward along the guide groove 23.

[0074] The follower wheel 21 is rotatably mounted on the bottom end of the slide plate 20. The axial direction of the follower wheel 21 extends along the X-axis direction. The follower wheel 21 is eccentrically connected to the rotating shaft 24. Both ends of the rotating shaft 24 are mounted in the bearings of the bracket 25. The workpiece in this embodiment is a metal or metal alloy workpiece with a relatively high density, such as iron, stainless steel, etc. Figure 8 As shown, in the initial state, the proximal side of the follower wheel 21 is close to the slide plate 20 and slightly protrudes from the slide plate 20. During the sliding process, the workpiece 3 on the slide plate 20 rolls and rubs with the follower wheel 21 to rotate the follower wheel 21, so that the distal side of the follower wheel 21 gradually protrudes from the slide plate 20. As the height of the distal side protruding from the slide plate 20 increases, the inclination angle of the workpiece 3 gradually becomes steeper, so that the workpiece 3 has a tendency to stand upright. When the workpiece 3 falls onto the conveyor belt 22, it is automatically corrected to a vertical state.

[0075] like Figure 2 As shown, a circle of arc-shaped limiting grooves 26 adapted to the workpiece is provided on the circumference of the follower wheel 21 , and the limiting grooves 26 are concave at the axial center of the follower wheel 21 .

[0076] The conveyor belt 22 is located downstream of the follower wheel 21, and is used to receive and convey the workpiece 3 after being guided by the follower wheel to the next process. The front side of the conveyor belt frame is installed with an upwardly protruding retaining wall 27, which can initially block the workpiece 3 when the workpiece 3 has not completely landed on the conveyor belt 22, prevent the workpiece 3 from rushing out of the conveyor belt 22, and make the workpiece land stably on the conveyor belt 22, avoiding the workpiece from tilting and shaking.

[0077] The conveyor belt 22 is a chain plate conveyor belt, and a plurality of annular ribs 28 for positioning the workpieces are installed at intervals along the running direction of the conveyor belt 22. The conveyor belt moves the ribs 28 to face the follower wheel 21 in sequence, and the workpiece 3 slides from the follower wheel 21 into the ribs 28.

[0078] like Figure 2 and Figure 3 As shown, a proximity switch 29 is installed on the inner side wall of the bracket 25 facing the follower wheel, which is used to brake the follower wheel 21 and reset it to the initial state. A sensing sheet 30 that can be sensed by the proximity switch 29 is installed on the proximal axis side of the follower wheel 21; an electromagnet 31 is also installed on the inner side wall of the bracket 25, the proximity switch 29 is connected to the controller, and the controller is connected to the electromagnet 31. An iron sheet 32 ​​and a tension spring 33 are installed on the follower wheel 21, one end of the tension spring 33 is welded and fixed in the spring slot 34 of the follower wheel 21, and the other end is welded to the iron sheet 32.

[0079] When the proximity switch 29 senses the sensing sheet 30, the iron sheet 32 ​​is just located opposite to the electromagnet 31, and the proximity switch 29 sends a detection signal to the controller. After receiving the signal, the controller energizes the electromagnet 31 to attract the iron sheet 32, and the follower wheel 21 stops rotating. At this time, the proximal side of the follower wheel 21 slightly protrudes from the slide 20, that is, the follower wheel 21 is in the initial state. A photoelectric switch 36 connected to the controller is installed on the left or right wall of the slide 20. The photoelectric switch 36 is used to detect whether the next workpiece arrives on the slide 20. When it detects that there is a workpiece on the slide 20, the controller de-energizes the electromagnet 31, and the follower wheel 21 can rotate again under the friction of the workpiece 3.

[0080] A guide column 35 perpendicular to the iron sheet 32 ​​is also installed on the iron sheet 32. A blind hole adapted to the guide column 35 is provided in the follower wheel 21. The guide column 35 is inserted into the blind hole. When the iron sheet 32 ​​is adsorbed by the electromagnet 31, the guide column 35 can move along the blind hole, so that the iron sheet 32 ​​is displaced only in the axial direction, preventing the iron sheet from being pulled away, thereby improving the reliability of braking the follower wheel 21.

[0081] The other structures of this embodiment are the same as those of Embodiment 1.

[0082] The steps for guiding the workpiece include:

[0083] The workpiece 3 falls from the blanking hole 6 onto the slide plate 20 and slides along the slide plate 20 to the bottom end of the slide plate;

[0084] In the initial state, the proximal side of the follower wheel 21 slightly protrudes from the slide plate 20. Figures 9 to 11 As shown, the workpiece 3 continues to slide downward due to rolling friction with the follower wheel 21, and the follower wheel 21 rotates counterclockwise. As the far-axis side of the follower wheel 21 gradually protrudes above the slide plate 20, the workpiece 3 is supported by the follower wheel 21 at a larger angle and tends to be in an upright state;

[0085] like Fig.12 As shown, the workpiece 3 is blocked by the retaining wall 27 of the conveyor belt 22 and then falls steadily onto the conveyor belt 22 , and the conveyor belt 22 intermittently carries the workpiece 3 forward;

[0086] The follower wheel 21 continues to rotate under the action of inertia until the proximity switch 29 detects the induction sheet 30, and the controller energizes the electromagnet 31 to adsorb the iron sheet 32 ​​on the follower wheel, so that the follower wheel 21 stops rotating. At this time, the follower wheel 21 is reset to the initial state, and its proximal side slightly protrudes from the slide plate 20;

[0087] When the photoelectric switch 36 detects that the next workpiece slides onto the slide plate 20, the controller turns off the power to the electromagnet 31, the tension spring 33 pulls back the iron sheet 32, and the follower wheel 21 releases the brake;

[0088] Repeat the above steps to guide the workpiece.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A workpiece automatic feeding device, characterized in that: include: A material bin, the material bin is fixed on the material platform, a material guide plate with a slope is arranged in the material bin, and the material guide plate guides the cylindrical workpiece to the upper material side; The material platform is provided with a material drop hole adapted to the workpiece near the loading side; The pusher assembly is used to push the workpieces in the bin out of the bin one by one at a set rhythm. The pusher assembly includes a first pusher and a second pusher installed from bottom to top. The first pusher and the second pusher push the workpieces in the bin out of the bin alternately, wherein: The first pusher comprises a first driving member and a first push plate connected in a driving manner, the first push plate is provided with first material holes and second material holes adapted to the workpiece arranged at intervals along the X-axis direction, the first driving member drives the first push plate to move in parallel with the material table along the X-axis direction, so that the second material holes and the first material holes are alternately aligned with the blanking holes on the material table; The second pusher comprises a second driving member and a second push plate connected in a driving manner, and a third material hole and a fourth material hole adapted to the workpiece are arranged at intervals along the X-axis direction on the second pusher, and the third material hole and the fourth material hole are both located on the loading side of the silo; the second driving member drives the second pusher to translate closely against the first pusher, so that the fourth material hole is alternately aligned with the first material hole and the second material hole, and the third material hole is intermittently aligned with the first material hole; The workpiece can slide from the material bin to the third material hole or the fourth material hole, and then roll into the drop hole from the first material hole and the fourth material hole respectively; The material bin is provided with an avoidance groove for translation of the first push plate and the second push plate.

2. The automatic workpiece feeding device according to claim 1, characterized in that: An upwardly protruding limit block is provided at one end of the first push plate away from the first driving member, and when the second driving member drives the fourth material hole of the second push plate to align with the second material hole, the limit block limits the second push plate.

3. The automatic workpiece feeding device according to claim 2, characterized in that: The lower end of the material guide plate is located upstream of the third material hole and close to the third material hole.

4. The automatic workpiece feeding device according to claim 1, characterized in that: A photoelectric sensor is installed on the top wall of the silo, and two of the photoelectric sensors are respectively located directly above the third material hole and the fourth material hole to detect whether there are workpieces in the third material hole and the fourth material hole.

5. The automatic workpiece feeding device according to claim 1, characterized in that: Also includes: The guiding assembly is used to guide the workpiece falling from the blanking hole in a horizontal state to a vertical state, and the guiding assembly includes: A slide plate, wherein the slide plate is fixed obliquely in a YZ plane just below the blanking hole; A follower wheel is rotatably mounted on the bottom end of the slide, the axial direction of the follower wheel extends along the X-axis direction, and the follower wheel is eccentrically connected to the rotating shaft; in an initial state, the proximal axis side of the follower wheel is close to the slide and protrudes from the slide, and the workpiece on the slide rolls and rubs against the follower wheel during the sliding process, thereby rotating the follower wheel, so that the distal axis side of the follower wheel gradually protrudes from the slide, thereby changing the support angle for the workpiece, and guiding the workpiece to a vertical state; The conveyor belt is located downstream of the follower wheel and is used for receiving and conveying the workpiece after being guided by the follower wheel.

6. The automatic workpiece feeding device according to claim 5, characterized in that: The circumference of the follower wheel is provided with a circle of arc-shaped limiting grooves adapted to the workpiece, and the limiting grooves are concave at the axial center of the follower wheel; the slide plate is also provided with a guide groove adapted to the workpiece, and the workpiece slides downward along the guide groove.

7. The automatic workpiece feeding device according to claim 5, characterized in that: The rotating shaft is installed on the bracket, and a proximity switch is installed on the bracket for braking the follower wheel and resetting it to the initial state. A sensing sheet is installed on the proximal axis side of the follower wheel; an electromagnet is also installed on the bracket, and the proximity switch is connected to a controller, and the controller is connected to the electromagnet; an iron sheet and a tension spring are installed on the follower wheel, and the tension spring is fixed on the follower wheel, and the other end of the tension spring is welded to the iron sheet; when the proximity switch senses the sensing sheet, the iron sheet is facing the electromagnet, and the controller energizes the electromagnet to absorb the iron sheet, thereby controlling the follower wheel to stop rotating; a photoelectric switch connected to the controller is installed on the slide, and the photoelectric switch is used to detect whether the next workpiece reaches the slide, so as to cut off the power of the electromagnet.

8. The automatic workpiece feeding device according to claim 5, characterized in that: The conveyor belt is a chain plate type conveyor belt, and a plurality of annular ribs for positioning workpieces are provided on the conveyor belt at intervals along the running direction of the conveyor belt. The conveyor belt moves the ribs to face the slide plate in sequence.

9. An automatic workpiece feeding method for the automatic workpiece feeding device according to claim 1, characterized in that: The following steps are involved: In the initial state, the second material hole of the first push plate is aligned with the material drop hole of the material platform, and the fourth material hole of the second push plate is aligned with the first material hole of the first push plate; Put multiple cylindrical workpieces horizontally into the material bin, and the workpieces roll down to the loading side along the material guide plate, and three of the workpieces roll into the third material hole, the fourth material hole and the first material hole respectively; The first driving member drives the first push plate to extend so that the first material hole is aligned with the blanking hole, and the workpiece enters the blanking hole; When the first driving member retracts the first push plate, the second driving member extends the second push plate until the first push plate is reset, and the fourth material hole is aligned with the second material hole, and the workpiece in the fourth material hole passes through the second material hole and falls into the drop hole; at this time, the first material hole is aligned with the third material hole, and the workpiece in the silo enters the third material hole and the first material hole for temporary storage; The first driving member extends the first push plate again, causing the workpiece in the first material hole to fall into the drop hole; at the same time, the second driving member resets the second push plate, causing the workpiece in the bin to roll into the fourth material hole; The first driving member retracts the first push plate again, and at this time, the first push plate and the second push plate both return to their initial states, and the above steps are repeated to continuously load the workpiece.

10. The automatic workpiece feeding method according to claim 9, characterized in that: The workpiece automatic feeding device also includes a guiding assembly, which is used to guide the workpiece falling from the drop hole in a horizontal state to a vertical state, and the guiding assembly includes: A slide plate, wherein the slide plate is fixed obliquely in a YZ plane just below the blanking hole; A follower wheel is rotatably mounted on the bottom end of the slide, the axial direction of the follower wheel extends along the X-axis direction, and the follower wheel is eccentrically connected to the rotating shaft; in an initial state, the proximal axis side of the follower wheel is close to the slide and protrudes from the slide, and the workpiece on the slide rolls and rubs against the follower wheel during the sliding process, thereby rotating the follower wheel, so that the distal axis side of the follower wheel gradually protrudes from the slide, thereby changing the support angle for the workpiece, and guiding the workpiece to a vertical state; A conveyor belt, located downstream of the follower wheel, for receiving and conveying the workpiece after being guided by the follower wheel; The rotating shaft is installed on the bracket, and a proximity switch is installed on the bracket to brake the follower wheel and reset it to the initial state. A sensing sheet is installed on the proximal axis side of the follower wheel; an electromagnet is also installed on the bracket, and the proximity switch is connected to a controller, and the controller is connected to the electromagnet; an iron sheet and a tension spring are installed on the follower wheel, and the tension spring is fixed on the follower wheel, and the other end of the tension spring is welded to the iron sheet; when the proximity switch senses the sensing sheet, the iron sheet is facing the electromagnet, and the controller energizes the electromagnet to absorb the iron sheet, thereby controlling the follower wheel to stop rotating; a photoelectric switch connected to the controller is installed on the slide, and the photoelectric switch is used to detect whether the next workpiece reaches the slide, so as to cut off the power of the electromagnet; After the workpiece falls from the blanking hole, the step of guiding the workpiece is also included, which includes: The workpiece falls from the blanking hole onto the slide plate and slides along the slide plate to the bottom end of the slide plate; In the initial state, the proximal side of the follower wheel slightly protrudes from the slide plate, and the workpiece continues to slide downward due to rolling friction between the follower wheel and the slide plate. As the distal side of the follower wheel gradually protrudes from the slide plate, the workpiece is supported by the follower wheel at a larger angle and tends to be in an upright state. The workpiece is blocked by the retaining wall outside the frame of the conveyor belt and then completely falls onto the conveyor belt, which intermittently carries the workpiece forward; The follower wheel continues to rotate under the action of inertia until the proximity switch detects the induction sheet. The controller then energizes the electromagnet to absorb the iron sheet on the follower wheel, causing the follower wheel to stop rotating. At this time, the follower wheel is reset to its initial state, with its proximal side slightly protruding from the slide plate. When the photoelectric switch detects that the next workpiece slides onto the slide, the controller cuts off the power to the electromagnet, stretches the spring to pull back the iron sheet, and releases the brake on the follower wheel; Slide the workpiece to the bottom of the slide and repeat the above steps to align the workpiece.

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