A zero-point positioning system for feeding and unloading auxiliary equipment and its usage method

Abstract

This invention provides a zero-point positioning system for loading and unloading auxiliary equipment and its usage method. The system includes a loading and unloading mechanism, characterized by a left loading device, a load-bearing device, a right unloading device, a transverse guide rail, a left guide rail, a right guide rail, and a base. A limiting block is installed in the middle of the transverse guide rail on the base, used to limit and fix the left loading device and right unloading device on either side. The load-bearing device includes a quick-change pallet, a positioning rivet, a load-bearing plate, and rotating components. The configured zero-point base plate and zero-point unit are installed at the machining position in the machine tool for zero-point positioning with the positioning rivet. The right unloading device has the same structure as the left loading device, used to unload or load workpieces in the middle of the machine tool. When used with a machine tool, this device allows for manual zero-point positioning, providing reliable positioning, convenient, labor-saving, and safe operation, improving processing efficiency and reducing labor intensity.

Description

Technical Field

[0001] This invention belongs to the field of machining and automatic detection technology and is applied to mechanical manufacturing production lines or CNC equipment clusters. Specifically, it is a zero-point positioning system for loading and unloading auxiliary equipment and its usage method. Background Technology

[0002] A zero-point positioning device is a unique positioning and locking mechanism that keeps the zero point (i.e., any reference point on the workpiece) constant or within acceptable tolerances when moving a workpiece from one station to another, one process to another, or one machine tool to another. This saves auxiliary time spent re-aligning the zero point, ensures work continuity, and improves work efficiency. Zero-point positioning devices are suitable for machining large batches of precision parts and have extensive applications in CNC machine tools, robotics, and intelligent manufacturing.

[0003] Zero-point positioning quick-change system mainly includes transfer device, waiting device, quick-change device and mechanical manufacturing production line or CNC equipment cluster. The transfer device of the existing zero-point positioning quick-change system can be a fully automatic AGV trolley guided by electromagnetic track, a follow-up semi-automatic balance crane or a manually operated roller trolley.

[0004] The aforementioned balance crane or roller trolley transfer devices are suitable for zero-point positioning quick-change systems with slow turnover rates. Typically, a lifting device is used to place the quick-change pallet on the balance crane, and then the pallet is manually placed onto the roller trolley. The former is more suitable for heavier quick-change pallets, while the latter is more suitable for lighter ones.

[0005] A quick-change device refers to a device that removes a ready-to-place quick-change pallet and performs a zero-point positioning operation. The quick-change devices for AGV trolleys and balanced right-guide rail 2-lift transfer devices both use automated robotic arms (or humans) for grasping and performing zero-point positioning operations. For roller trolley transfer devices, there is currently no suitable quick-change device for manual zero-point positioning operations. Because the quick-change pallets are relatively heavy (around 20kg), single-person operation is strenuous and does not meet general industry safety requirements, resulting in low safety and a high risk of injury or equipment damage.

[0006] Therefore, there is an urgent need to develop a zero-point positioning system for loading and unloading auxiliary equipment and its usage method, which can be used in conjunction with machine tools. With the help of this device, zero-point positioning can be performed manually. The zero-point positioning is reliable, convenient and labor-saving, and safe to use. It can improve processing efficiency and reduce labor intensity. This is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] To address the aforementioned problems in the prior art, this invention provides a zero-point positioning system for loading and unloading auxiliary equipment and its usage method. Used in conjunction with a machine tool, this device allows for manual zero-point positioning, ensuring reliable positioning, ease of operation, labor-saving operation, and safe use. It can improve processing efficiency and reduce labor intensity.

[0008] The objective of this invention is achieved through the following technical solution:

[0009] A zero-point positioning system for loading and unloading auxiliary equipment includes a loading and unloading mechanism. The loading and unloading mechanism comprises a left loading device, a load-bearing device, a right unloading device, a limiting block, a transverse guide rail, and a base. The transverse guide rail is transversely arranged on the base, and the limiting block is located in the middle of the transverse guide rail. The left loading device and the right unloading device move transversely on the transverse guide rail on the left and right sides of the limiting block, respectively. The limiting block is used to position the left loading device and the right unloading device to the center of the machine tool. The load-bearing device includes a quick-change tray, a positioning pull stud, a load-bearing plate, and a rotating component. The positioning rivet is installed on the bottom surface of the quick-change tray. The rotating component is set on the load-bearing plate on the left and right sides of the quick-change tray. The quick-change tray is used to place the workpiece to be processed. The load-bearing plate is used to support the entire load-bearing device to move on the transverse guide rail. The left loading device is used to move the load-bearing device and the workpiece it carries to the processing position in the middle of the machine tool. The right unloading device is used to unload the load-bearing device and the workpiece it carries from the middle of the machine tool. The loading and unloading mechanism is also equipped with a zero-point base plate and a zero-point unit. The zero-point unit is installed on the zero-point base plate. The zero-point unit and the positioning rivet are assembled and cooperated to achieve zero-point positioning.

[0010] Improvements to the above technical solution: The right unloading device has the same structure as the left loading device. Both the right unloading device and the left loading device consist of a right guide rail, a left guide rail, a moving table, two cylinders, and connecting rods. The moving table is connected to the transverse guide rail via a slider and is used to support the workpiece to be processed and move it left and right. The extension and retraction of the two cylinders drive the rotation of the two connecting rods, which in turn drive the extension and retraction of the left and right guide rails. During loading and unloading, the left and right guide rails extend outward in a longitudinal state. When the machine tool processes the workpiece, the left and right guide rails retract inward in a transverse state so that the safety door on the machine tool can be closed.

[0011] Further improvements to the above technical solution: A left transition support and a right transition support are longitudinally arranged on the zero-point base plate. The left transition support and the right transition support are respectively used to dock with the left guide rail and the right guide rail in the extended longitudinal state, supporting the left loading device or the right unloading device to enter or exit the processing position in the middle of the machine tool; a locking handle is provided on the moving table of the right unloading device and the left loading device, which is used to lock and fix the left loading device and the right unloading device in this position after they have moved to the middle of the machine tool.

[0012] Further improvements to the above technical solution: The zero-point base plate is used to connect with the worktable of the machine tool, and two lifting devices are respectively connected to both ends of the top surface of the zero-point base plate. The lifting devices support the raising and lowering of the load-bearing device. When the lifting devices are raised, the zero-point unit is disengaged from the positioning pull stud. When the lifting devices are lowered, the zero-point unit engages with the positioning pull stud, and the zero-point unit moves to fix the load-bearing device on the machine tool to realize the workpiece processing operation.

[0013] Further improvements to the above technical solution: The lifting device includes a lifting seat, a guide rod, a linear bearing, a roller guide rail, a cylinder rod, and a top cover. The cylinder rod is disposed in a cylindrical groove in the middle of the lifting seat, and a top cover with a hole in the middle is disposed on the cylindrical groove. Each end of the lifting seat has an insertion hole, and a linear bearing is disposed at the upper end of each insertion hole. A guide rod is inserted into each of the two insertion holes and the linear bearing. The upper ends of the cylinder rod and the guide rod are connected to the roller guide rail. The lifting device uses compressed air, and the lifting and lowering of the roller guide rail is achieved by injecting compressed air into the rod-side and rodless-side chambers, thereby raising and lowering the load-bearing device.

[0014] Further improvements to the above technical solution: The base includes two square frames at both ends, a fixed crossbeam, a connecting fixing plate, and casters. The two square frames are arranged in parallel and spaced apart. The lower ends of the two square frames are fixedly connected to both ends of the fixed crossbeam, and the upper ends of the two square frames are fixedly connected to both ends of the connecting fixing plate. The connecting fixing plate is located directly above the fixed crossbeam. Two casters are provided on the bottom surface of each square frame. The connecting fixing plate is connected to the lateral guide rail.

[0015] Further improvements to the above technical solution: The base includes two square frames at both ends, a fixed crossbeam, a connecting fixing plate, and casters. The two square frames are arranged in parallel and spaced apart. The lower ends of the two square frames are fixedly connected to both ends of the fixed crossbeam, and the upper ends of the two square frames are fixedly connected to both ends of the connecting fixing plate. The connecting fixing plate is located directly above the fixed crossbeam. Two casters are provided on the bottom surface of each square frame. The connecting fixing plate is connected to the traverse guide rail, and two fixing studs are provided on the fixed crossbeam.

[0016] Further improvements to the above technical solution: Each of the two vertical columns of the square frame includes a fixed column in the upper half and a replaceable column in the lower half. The upper end of the replaceable column is connected to the lower end of the fixed column by an adjusting stud. The lower end of the replaceable column is detachably connected to the bottom crossbar of the square frame. The connecting fixing plate is connected to the transverse guide rail by screws.

[0017] The present invention discloses a method for using the loading and unloading auxiliary device of the above-mentioned zero-point positioning system, characterized by comprising the following steps:

[0018] Step 1: The workpiece to be processed is placed manually on the load-bearing device, and the load-bearing device and the workpiece to be processed are placed together on the left loading device;

[0019] Step 2: After manually moving the left loading device to the middle of the machine tool, it is fixed in place by the limit block;

[0020] Step 3: Extend the left and right guide rails on the left loading device until they are straight and longitudinal. Then, manually move the load-bearing device to the workstation to be processed on the machine tool table, and the machine tool will start working. After completing this action, the left loading device returns to the far left of the equipment, waiting for manual installation of the workpiece to be processed.

[0021] Step 4: After the workpiece is processed, the right unloading device is manually moved to the middle position of the machine tool and fixed by the limit block;

[0022] Step 5: Extend the left and right guide rails on the right unloading device so that they are longitudinally aligned. Then, manually move the load-bearing device together with the processed workpiece onto the right unloading device and move it to the far right to unload the processed workpiece.

[0023] Further, in step 2, after the left loading device moves to the middle position of the machine tool and is positioned by the limit block, the left loading device is fixed in this position by the locking handle on the left loading device; in step 3, the left guide rail and the right guide rail are driven to straighten into a longitudinal state by the two cylinders below the left loading device, and the left guide rail and the right guide rail are respectively connected to the left transition support and the right transition support; when the load-bearing device moves to the processing position in the machine tool, the lifting device supports the load-bearing device to descend, so that the zero point unit cooperates with the positioning pull stud, and the zero point unit is activated to fix the load-bearing device. The workpiece is fixed on the machine tool, and then the machine tool begins to process the workpiece. In step 4, after the workpiece is processed, the right unloading device moves to the middle position of the machine tool and is limited by the limit block. The right unloading device is then fixed in this position by the locking handle on the right unloading device. The lifting device is raised to disengage the zero point unit from the positioning pull pin, preparing for step 5. In step 5, the two cylinders below the right unloading device drive the left and right guide rails to straighten into a longitudinal state. The left and right guide rails are respectively connected to the left transition support and the right transition support.

[0024] The advantages and positive effects of this invention compared with the prior art are:

[0025] 1. The zero-point positioning system of the present invention is used in conjunction with the auxiliary loading and unloading device of the machine tool. With the help of this device, the zero-point positioning operation can be carried out manually. The zero-point positioning is reliable, convenient and labor-saving, safe to use, and can improve processing efficiency and reduce labor intensity.

[0026] 2. The method of using the zero-point positioning system's loading and unloading auxiliary device of the present invention involves manually placing the workpiece to be processed onto the load-bearing device, which is then fixed together with the workpiece on the left loading device. After manually moving the left loading device to the center of the machine tool, a limiting block positions and fixes it in place. The load-bearing device is then manually moved to the processing station on the machine tool, and the machine tool begins operation. After this action is completed, the left loading device returns to the far left of the equipment, awaiting manual installation of the workpiece. After the workpiece is processed, the right unloading device is manually moved to the center of the machine tool, limited by a limiting block, and fixed in place. The load-bearing device, along with the processed workpiece, is then manually placed onto the right unloading device and moved to the far right to unload the processed workpiece. This saves loading and unloading time, achieving fast and efficient parts processing, while significantly reducing labor intensity and improving work efficiency. Attached Figure Description

[0027] Figure 1 This is a perspective view of a zero-point positioning system for feeding and unloading auxiliary equipment according to the present invention;

[0028] Figure 2This is a partially enlarged view showing the extended state of the left and right guide rails in the loading and unloading auxiliary device of the zero-point positioning system of the present invention;

[0029] Figure 3 This is a perspective view of the left loading device or the right unloading device in the loading and unloading auxiliary equipment of the zero-point positioning system of the present invention;

[0030] Figure 4 This is a schematic diagram of the load-bearing device in the feeding and unloading auxiliary equipment of the zero-point positioning system of the present invention;

[0031] Figure 5 This is a schematic diagram of the connection structure of the lifting device, zero-point base plate and zero-point unit in the loading and unloading auxiliary equipment of the zero-point positioning system of the present invention.

[0032] Figure 6 This is a cross-sectional structural diagram of the lifting device in the feeding and unloading auxiliary equipment of the zero-point positioning system of the present invention;

[0033] Figure 7 This is a schematic diagram of the base structure in the loading and unloading auxiliary device of the zero-point positioning system of the present invention.

[0034] The following are the labels in the diagram: 1. Machine tool; 2. Load-bearing device; 3. Left transition support; 4. Right transition support; 5. Right unloading device; 6. Base; 7. Fixing stud; 8. Limit block; 9. Transverse guide rail; 10. Left loading device; 11. Locking handle; 12. Right guide rail; 13. Left guide rail; 14. Moving table; 15. Cylinder; 16. Connecting rod; 17. Quick-change pallet; 18. Positioning rivet; 19. Load-bearing plate; 20. Bearing sleeve; 21. Roller; 22. Lifting device; 23. Zero point base plate; 24. Zero point unit; 25. Lifting seat; 26. Guide rod; 27. Linear bearing; 28. Roller guide rail; 29. ​​Cylinder rod; 30. Top cover; 31. Casters; 32. Replaceable column; 33. Adjusting stud; 34. Connecting fixing plate; 35. Fixed crossbeam. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings:

[0036] See Figures 1-7This invention discloses an embodiment of a zero-point positioning system for a loading and unloading auxiliary device, comprising a loading and unloading mechanism. The loading and unloading mechanism includes a left loading device 10, a load-bearing device 2, a right unloading device 5, a limiting block 8, a transverse guide rail 9, and a base 6. The transverse guide rail 9 is transversely arranged on the base 6, and the limiting block 8 is arranged in the middle of the transverse guide rail 9. The left loading device 10 and the right unloading device 5 move laterally on the transverse guide rail 9 on the left and right sides of the limiting block 8, respectively. The load-bearing device 2 is mounted on the left loading device 10, and the limiting block 8 is used to move the left loading device 10 and the right unloading device 5 to the middle of the machine tool 1 to achieve position positioning. The load-bearing device 2 includes a quick-change tray 17, a positioning rivet 18, a load-bearing plate 19, and rotating components. The positioning rivet 18 is mounted on the bottom surface of the quick-change tray 17, and the rotating components are arranged on the load-bearing plates 19 on the left and right sides of the quick-change tray 17. The quick-change pallet 17 is used to place the workpiece to be processed, the load-bearing plate 19 is used to support the entire load-bearing device 2 to move on the transverse guide rail 9, the left loading device 10 is used to move the load-bearing device 2 and the carried workpiece to the processing position in the middle of the machine tool 1, and the right unloading device 5 is used to unload the load-bearing device 2 and the carried workpiece in the middle of the machine tool 1. The loading and unloading mechanism is also equipped with a zero-point base plate 23 and a zero-point unit 24. The zero-point unit 24 is installed on the zero-point base plate 23, and the zero-point positioning is achieved by assembling and cooperating with the positioning pull stud 18 on the quick-change pallet 17.

[0037] Furthermore, the right unloading device 5 and the left loading device 10 have the same structure. Both the right unloading device 5 and the left loading device 10 consist of a right guide rail 12, a left guide rail 13, a moving table 14, two cylinders 15, and a connecting rod 16. The moving table 14 is connected to the transverse guide rail 9 via a slider and is used to support the workpiece to be processed and move it left and right. The extension and retraction of the two cylinders 15 drive the two connecting rods 16 to rotate, which in turn drives the extension and retraction of the left guide rail 13 and the right guide rail 12. During loading and unloading, the left guide rail 13 and the right guide rail 12 extend outward in a longitudinal state (e.g., ...). Figure 2 As shown in the figure, when the machine tool 1 is processing the workpiece, the left guide rail 13 and the right guide rail 12 retract inward and are arranged horizontally so that the safety door on the machine tool 1 can be closed during workpiece processing.

[0038] Furthermore, a left transition support 3 and a right transition support 4 are longitudinally arranged on the aforementioned zero-point base plate 23. The left transition support 3 and the right transition support 4 are respectively used to dock with the left guide rail 13 and the right guide rail 12 in their extended longitudinal states, supporting the left loading device 10 or the right unloading device 5 to enter or exit the processing position in the middle of the machine tool 1. Locking handles 11 are provided on the moving table 14 of the right unloading device 5 and the left loading device 10, respectively, to lock and fix the left loading device 10 and the right unloading device 5 in this position after they have moved to the middle of the machine tool 1. The rotating components set on the load-bearing plates 19 on the left and right sides of the quick-change tray 17 are rotating shafts, or bearing sleeves 20 and rollers 21. The purpose is to make the load-bearing device 2 easy to move back and forth along the left guide rail 13, the right guide rail 12, the left transition support 3 and the right transition support 4 through the rolling motion of the rotating components, which facilitates manual operation of the workpiece to be processed for zero-point positioning and removal of the processed workpiece from the zero-point positioning system.

[0039] Furthermore, the zero-point base plate 23 is connected to the worktable of the machine tool 1. Two lifting devices 22 are respectively connected to both ends of the top surface of the zero-point base plate 23. The lifting devices 22 support the raising and lowering of the load-bearing device 2. When the lifting devices 22 are raised, the zero-point unit 24 is disengaged from the positioning pull pin 18; when the lifting devices 22 are lowered, the zero-point unit 24 engages with the positioning pull pin 18 to achieve zero-point positioning, fixing the load-bearing device 2 on the machine tool 1, after which workpiece processing can be performed. Through the positioning accuracy of the zero-point unit 24, batch processing of parts can be achieved in one tool setting.

[0040] Specifically, the lifting device 22 includes a lifting base 25, guide rods 26, linear bearings 27, roller guide rails 28, cylinder rods 29, and a top cover 30. The cylinder rod 29 is installed in a cylindrical groove in the middle of the lifting base 25, and a top cover 30 with a central hole is installed on the cylindrical groove. An insertion hole is provided at each end of the lifting base 25, with a linear bearing 27 installed at the upper end of each insertion hole. A guide rod 26 is inserted into each of the two insertion holes and the two linear bearings 27. The upper ends of the cylinder rod 29 and the guide rods 27 are connected to the roller guide rails 28. The lifting device 22 uses compressed air; by injecting compressed air into the rod-side and rodless-side chambers, the roller guide rails 28 are raised and lowered, and the load-bearing device 2 is lifted and lowered. When the lifting device 22 is raised, the zero-point unit 24 can be disengaged from the positioning rivet 18. After disengagement, the load-bearing device 2 can move back and forth for loading and unloading workpieces.

[0041] Furthermore, the aforementioned base 6 includes two square frames at both ends, a fixed crossbeam 35, a connecting fixing plate 34, and casters 31. The two square frames are arranged parallel and spaced apart. The lower ends of the two square frames are fixedly connected to both ends of the fixed crossbeam 35, and the upper ends of the two square frames are fixedly connected to both ends of the connecting fixing plate 34. The connecting fixing plate 34 is located directly above the fixed crossbeam 35. Each square frame has two casters 31 on its bottom surface. The connecting fixing plate 34 is connected to the traverse guide rail 9 and can bear the weight of the entire device. Two fixing studs 7 are provided on the fixed crossbeam 35. By adjusting the two fixing studs 7, the lower ends of the two fixing studs 7 are supported on the ground, making them firmly fixed and not easy to move.

[0042] Preferably, each square frame has two vertical columns, including a fixed upper column and a replaceable lower column 32. The upper end of the replaceable column 32 is connected to the lower end of the fixed column via an adjusting stud 33, and the lower end of the replaceable column 32 is detachably connected to the bottom crossbar of the square frame. The connecting fixing plate 34 is connected to the transverse guide rail 9 by screws. The base 6 can be adapted to machine tools 1 of different heights by replacing the replaceable columns 32 of different heights; the adjusting stud 33 can achieve fine-tuning of the height of the base 6 to accommodate installation errors caused by uneven ground.

[0043] The zero-point positioning system of the present invention is used in conjunction with the loading and unloading auxiliary equipment of the machine tool 1.

[0044] See Figures 1-7 An embodiment of the method for using the loading and unloading auxiliary device of the above-mentioned zero-point positioning system of the present invention includes the following steps:

[0045] Step 1: The workpiece to be processed is placed manually on the load-bearing device 2, and the load-bearing device 2 and the workpiece to be processed are placed together on the left loading device 10;

[0046] Step 2: After the left loading device 10 is manually moved to the middle of the machine tool 1, it is fixed by the position positioning block 8;

[0047] Step 3: Extend the left guide rail 13 and right guide rail 12 on the left loading device 10, so that the left guide rail 13 and right guide rail 12 are straight and in a longitudinal state. Then, manually move the load-bearing device 2 to the workstation to be processed on the machine tool 1 worktable, and the machine tool 1 starts to work. After completing this action, the left loading device 10 returns to the leftmost side of the equipment, waiting for manual installation of the workpiece to be processed.

[0048] Step 4: After the workpiece is processed, the right unloading device 5 is manually moved to the middle position of the machine tool 1 and fixed by the limit block 8;

[0049] Step 5: Extend the left guide rail 13 and right guide rail 12 on the right unloading device 5 so that the left guide rail 13 and right guide rail 12 are longitudinal. Then, manually move the load-bearing device 2 together with the processed workpiece and place it on the right unloading device 5, and move it to the far right to unload the processed workpiece.

[0050] Further, in step 2, after the left loading device 10 moves to the middle position of the machine tool 1 and is positioned by the limiting block 8, the left loading device 10 is fixed here by the locking handle 11 on the left loading device 10; in step 3, the two cylinders 15 below the left loading device 10 drive the two connecting rods 16 to rotate, so that the left guide rail 13 and the right guide rail 12 are straightened in a longitudinal state, and the left guide rail 13 and the right guide rail 12 are respectively connected to the left transition support 3 and the right transition support 4; when the load-bearing device 2 moves to the work position in the machine tool 1, the lifting device 22 supports the load-bearing device 2 to descend, so that the zero point unit 24 cooperates with the positioning pull pin 18, and the zero point unit 24 is activated to fix the load-bearing device 2 on the machine tool 1. When the guide rail 13 and the right guide rail 12 retract to their initial transverse state, the safety door on the machine tool 1 closes, and the machine tool 1 then begins to process the workpiece. In step 4, after the workpiece is processed, the right unloading device 5 moves to the middle position limit block 8 of the machine tool 1 and is then limited. The right unloading device 5 is then fixed in place by the locking handle 11 on the right unloading device 5. The lifting device 22 is raised, so that the zero point unit 24 is disengaged from the positioning pull pin 18, and step 5 is prepared. In step 5, the two cylinders 15 below the right unloading device 5 drive the left guide rail 13 and the right guide rail 12 to straighten into a longitudinal state. The left guide rail 13 and the right guide rail 12 are respectively connected to the left transition support 3 and the right transition support 4.

[0051] In practical use, after the left loading device 10 has finished loading, the empty left loading device 10 is manually moved to the left along the transverse guide rail 9 to the left end of the machine tool 1, and locked with the locking handle 11, awaiting manual placement of the workpiece to be processed. Subsequently, the empty right loading device 5 is manually moved to the left along the transverse guide rail 9 to the middle (loading or unloading) position of the machine tool 1, positioned by the limit block 8, and locked with the locking handle 11, awaiting manual unloading. When unloading, the safety door on the machine tool 1 opens first; then the left guide rail 13 and right guide rail 12 on the right unloading device 5 are pneumatically extended, making the left guide rail 13 and right guide rail 12 longitudinally aligned; then, the load-bearing device 2, together with the processed workpiece, is manually moved from the zero-point positioning unit to the rear (right unloading device 5) and placed on the right unloading device 5; finally, the right unloading device 5 is manually moved along the transverse guide rail 9 to the far right of the machine tool to unload the processed workpiece. The above operations are repeated.

[0052] The above-described method of the present invention saves loading and unloading time, enables quick processing of parts, significantly reduces labor intensity, improves work efficiency, ensures the personal safety of operators, and reduces the risk of equipment damage accidents.

[0053] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A zero positioning system loading and unloading auxiliary device, comprising a loading and unloading mechanism, characterized in that, The loading and unloading mechanism includes a left loading device, a load-bearing device, a right unloading device, a limiting block, a transverse guide rail, and a base. The transverse guide rail is horizontally mounted on the base, and the limiting block is positioned in the middle of the transverse guide rail. The left loading device and the right unloading device move laterally on the transverse guide rail on the left and right sides of the limiting block, respectively. The limiting block is used to position the left loading device and the right unloading device after they are moved to the center of the machine tool. The load-bearing device includes a quick-change tray, a positioning rivet, a load-bearing plate, and a rotating component. The positioning rivet is mounted on the bottom surface of the quick-change tray. The rotating components are installed on the load-bearing plates on both sides of the quick-change tray. The quick-change tray is used to place the workpiece to be processed, and the load-bearing plates are used to support the entire load-bearing device to move on the transverse guide rail. The left loading device is used to move the load-bearing device and the workpiece it carries to the processing position in the middle of the machine tool. The right unloading device is used to unload the load-bearing device and the workpiece it carries from the middle of the machine tool. The loading and unloading mechanism is also equipped with a zero-point base plate and a zero-point unit. The zero-point unit is installed on the zero-point base plate, and the zero-point unit is assembled and cooperated with the positioning pull stud to achieve zero-point positioning. The right unloading device has the same structure as the left loading device. Both the right unloading device and the left loading device consist of a right guide rail, a left guide rail, a moving table, two cylinders, and connecting rods. The moving table is connected to the transverse guide rail via a slider and is used to support the workpiece to be processed and move it left and right. The extension and retraction of the two cylinders drive the rotation of the two connecting rods, which in turn drive the extension and retraction of the left and right guide rails respectively. During loading and unloading, the left and right guide rails extend outward in a longitudinal state. When the machine tool processes the workpiece, the left and right guide rails retract inward in a transverse state so that the safety door on the machine tool can be closed.

2. The zero positioning system loading and unloading auxiliary machine device according to claim 1, characterized in that, The zero-point base plate is longitudinally provided with a left transition support and a right transition support. The left transition support and the right transition support are respectively used to dock with the left guide rail and the right guide rail in the extended longitudinal state, supporting the left loading device or the right unloading device to enter or exit the processing position in the middle of the machine tool. The moving table of the right unloading device and the left loading device is provided with a locking handle, which is used to lock and fix the left loading device and the right unloading device in this position after they have moved to the middle of the machine tool for positioning.

3. The zero positioning system loading and unloading auxiliary machine device according to claim 1 or 2, characterized in that The zero-point base plate is used to connect to the worktable of the machine tool. Two lifting devices are respectively connected to both ends of the top surface of the zero-point base plate. The lifting devices support the raising and lowering of the load-bearing device. When the lifting devices are raised, the zero-point unit is disengaged from the positioning pull stud. When the lifting devices are lowered, the zero-point unit engages with the positioning pull stud, and the zero-point unit moves to fix the load-bearing device on the machine tool to realize the workpiece processing operation.

4. The zero positioning system loading and unloading auxiliary machine device according to claim 3, characterized in that The lifting device includes a lifting base, guide rods, linear bearings, roller guide rails, cylinder rods, and a top cover. The cylinder rod is disposed in a cylindrical groove in the middle of the lifting base, and a top cover with a central hole is disposed on the cylindrical groove. A insertion hole is provided at each end of the lifting base, and a linear bearing is disposed at the upper end of each insertion hole. A guide rod is inserted into each of the two insertion holes and the linear bearings. The upper ends of the cylinder rods and guide rods are connected to the roller guide rails. The lifting device uses compressed air; by injecting compressed air into the rod-side and rodless-side chambers, the roller guide rails are raised and lowered, and the load-bearing device is lifted and lowered.

5. The zero positioning system loading and unloading auxiliary machine device according to claim 1 or 2, characterized in that The base includes two square frames at both ends, a fixed crossbeam, a connecting fixing plate, and casters. The two square frames are arranged in parallel and spaced apart. The lower ends of the two square frames are fixedly connected to both ends of the fixed crossbeam, and the upper ends of the two square frames are fixedly connected to both ends of the connecting fixing plate. The connecting fixing plate is located directly above the fixed crossbeam. Two casters are provided on the bottom surface of each square frame. The connecting fixing plate is connected to the traverse guide rail, and two fixing studs are provided on the fixed crossbeam.

6. The zero positioning system loading and unloading auxiliary machine device according to claim 4, characterized in that The base includes two square frames at both ends, a fixed crossbeam, a connecting fixing plate, and casters. The two square frames are arranged in parallel and spaced apart. The lower ends of the two square frames are fixedly connected to both ends of the fixed crossbeam, and the upper ends of the two square frames are fixedly connected to both ends of the connecting fixing plate. The connecting fixing plate is located directly above the fixed crossbeam. Two casters are provided on the bottom surface of each square frame. The connecting fixing plate is connected to the traverse guide rail, and two fixing studs are provided on the fixed crossbeam.

7. The zero positioning system loading and unloading auxiliary machine device according to claim 5, characterized in that Each of the square frames has two vertical columns, including a fixed column in the upper half and a replaceable column in the lower half. The upper end of the replaceable column is connected to the lower end of the fixed column by an adjusting stud, and the lower end of the replaceable column is detachably connected to the bottom crossbar of the square frame. The connecting fixing plate is connected to the transverse guide rail by screws.

8. The method of using the zero positioning system loading and unloading auxiliary device of claim 2, characterized in that The process includes the following steps: Step 1: The workpiece to be processed is placed manually on the load-bearing device, and the load-bearing device and the workpiece to be processed are placed together on the left loading device; Step 2: After manually moving the left loading device to the middle of the machine tool, it is fixed in place by the limit block; Step 3: Extend the left and right guide rails on the left loading device until they are straight and longitudinal. Then, manually move the load-bearing device to the workstation to be processed on the machine tool table, and the machine tool will start working. After completing this action, the left loading device returns to the far left of the equipment, waiting for manual installation of the workpiece to be processed. Step 4: After the workpiece is processed, the right unloading device is manually moved to the middle position of the machine tool and fixed by the limit block; Step 5: Extend the left and right guide rails on the right unloading device so that they are longitudinally aligned. Then, manually move the load-bearing device together with the processed workpiece onto the right unloading device and move it to the far right to unload the processed workpiece.

9. The method of using the zero positioning system loading and unloading auxiliary device of claim 8, characterized in that In step 2, after the left loading device moves to the middle position of the machine tool and is positioned by the limit block, the left loading device is fixed in this position by the locking handle on the left loading device; in step 3, the left guide rail and the right guide rail are driven to straighten into a longitudinal state by the two cylinders below the left loading device, and the left guide rail and the right guide rail are respectively connected to the left transition support and the right transition support; when the load-bearing device moves to the processing position in the machine tool, the lifting device supports the load-bearing device to descend, so that the zero point unit cooperates with the positioning pull stud, and the zero point unit is activated to fix the load-bearing device in place. On the machine tool, the machine tool begins to process the workpiece; in step 4, after the workpiece is processed, the right unloading device moves to the middle position of the machine tool and is limited by the limit block. Then, the right unloading device is fixed at this position by the locking handle on the right unloading device; the lifting device is raised to disengage the zero point unit from the positioning pull pin, preparing for step 5; in step 5, the two cylinders below the right unloading device drive the left guide rail and the right guide rail to straighten into a longitudinal state, and the left guide rail and the right guide rail are respectively connected to the left transition support and the right transition support.

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