An elongated shaft clamping device and method applied to a multi-station rotary table shot blasting machine

Abstract

The application discloses an elongated shaft clamping device and method applied to a multi-station rotary table shot blasting machine, and relates to the field of shot blasting machines.The device comprises a main rotary workbench connected with rotary power, and the main rotary workbench is circumferentially separated into multiple stations, each station is provided with a workpiece clamping rotary table, each workpiece clamping rotary table is connected with a same rotary table driving mechanism, and the workpiece clamping rotary table is provided with a protrusion for abutting against one end of an elongated shaft; the device further comprises a pressing rod, a rod segment of the pressing rod in the main rotary workbench is sleeved with a spring, and a top end of the pressing rod is connected with a clamping plate; a pushing component is arranged above the main rotary workbench, the pushing component is connected with a lifting groove, the pushing component drives the lifting groove to move downward to cooperate with the pressing rod of any station, and the lifting groove can be separated from the pressing rod cooperating therewith when the main rotary workbench rotates.The device can completely expose a machining area of an elongated shaft part by cooperation of the pressing rod and the workpiece clamping rotary table, and the machining efficiency can be improved; and multiple stations are arranged, different operations can be performed on each station, and the degree of automation is high.

Description

Technical Field

[0001] This invention relates to the field of shot peening machines, and more particularly to a slender shaft clamping device and method for use in multi-station rotary table shot peening machines. Background Technology

[0002] For slender shaft parts that require shot peening on all surfaces except the end faces, a multi-station rotary table shot peening machine is typically used. These shaft parts have tapered holes machined on both end faces and stand vertically in each station, held by upper and lower centers. For example, CN116276684A discloses a shot peening fixture for hollow shaft parts with a large length-to-diameter ratio. The part stands vertically at the center of the rotary table, and the smaller end is held and fixed by a protective fixture. An auxiliary support frame further supports the upper end of the part, and two shot peening guns are configured for the shot peening fixture. The inner and outer surfaces of the part are shot peened simultaneously using the two guns. In this design, although the shaft part is held vertically, there is an obstruction area due to the circumferential rotating wheel of the shaft part cooperating with the protective fixture. Although the part can rotate, it still affects the shot peening operation. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a slender shaft clamping device and method for use in a multi-station rotary shot peening machine. By using a pressure rod in conjunction with the workpiece clamping rotary table, the processing area of ​​the slender shaft part is fully exposed, which can improve processing efficiency. Furthermore, multiple stations are set up, each of which can perform different operations, resulting in a high degree of automation.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] In a first aspect, embodiments of the present invention provide a slender shaft clamping device for a multi-station rotary shot peening machine, including a main rotary worktable connected to a rotary power source. The main rotary worktable is circumferentially divided into multiple workstations by multiple support partitions. Each workstation is equipped with a workpiece clamping turntable, and each workpiece clamping turntable is connected to the same turntable drive mechanism. The workpiece clamping turntable has a protrusion for abutting one end of the slender shaft.

[0006] It also includes a pressure rod located above the workpiece clamping turntable. The section of the pressure rod located inside the main rotary table is fitted with a spring, and the top of the pressure rod is connected to a clamping plate. A pushing component is provided above the main rotary table. The pushing component is connected to a lifting groove. The pushing component drives the lifting groove to move down to cooperate with the pressure rod at any station. The lifting groove can disengage from the pressure rod it cooperates with when the main rotary table rotates.

[0007] As a further implementation, the lifting groove has an inverted U-shaped structure, with lifting plates installed opposite each other at the open ends of the lifting groove, forming a pressure rod holding space between the two lifting plates; the size of the holding plate is larger than the pressure rod holding space.

[0008] As a further implementation, the tops of each support partition are connected by a top plate, which corresponds to a guide sleeve installed at each workstation, through which the pressure rod passes.

[0009] As a further implementation, a main rotating shaft is installed at the center of the main rotary table, and the axes of each pressure rod are parallel to the main rotating shaft to axially press the slender shaft.

[0010] As a further implementation, the main rotary table is connected to a rotary motor; the turntable drive mechanism includes a turntable motor and a drive pulley mounted on the turntable motor, and each workpiece clamping turntable is connected to a driven pulley, with each driven pulley connected to the drive pulley via a belt.

[0011] As a further implementation, the belt is also connected to a belt tensioning device.

[0012] As a further implementation, the protrusion is a conical protrusion and is located at the center of the workpiece clamping turntable.

[0013] As a further implementation, the actuating component may be an electric push rod or a cylinder.

[0014] Secondly, embodiments of the present invention also provide a method for operating a slender shaft clamping device applied to a multi-station rotary table shot peening machine, comprising:

[0015] In the working state, the workpiece clamping turntable rotates with the main rotary table and also rotates around its own axis, driving the slender shaft to both revolve and rotate.

[0016] During loading and unloading, the main rotary table stops rotating. At the same time, the driven pulleys on the coaxial sides of the workpiece clamping turntable in the loading and unloading stations disengage from the belt, and the workpiece clamping turntable stops rotating. At this time, loading and unloading operations are carried out. The workpiece clamping turntables in other stations rotate normally to complete the work of their respective stations.

[0017] As a further implementation, during loading, the slender shaft is first vertically clamped by the robot and placed on the protrusion of the workpiece clamping turntable. The pushing component drives the lifting groove and lifting plate to move downward in a straight line. The clamping plate is no longer restricted. Under the action of the compressed spring, the pressure rod moves downward until it contacts the top of the slender shaft, so that the slender shaft is vertically clamped between the pressure rod and the protrusion.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The workpiece clamping turntable of the present invention rotates around the main rotating axis along with the main rotary table and also rotates around its own axis, driving the slender shaft part to both revolve and rotate; enabling multiple stations to perform different tasks; at the same time, the pressure rod cooperates with the workpiece clamping turntable to clamp the slender shaft part, so that the processing area of ​​the slender shaft part is fully exposed, which can improve processing efficiency; multiple stations correspond to one push component, saving space and cost.

[0020] (2) The workpiece clamping turntable of the present invention is connected to the driven pulley. Due to the belt tensioning device, the main rotary table stops rotating during loading and unloading. At the same time, the driven pulley coaxial with the workpiece clamping turntable in the loading and unloading station disengages from the belt, and the workpiece clamping turntable stops rotating. At this time, loading and unloading work is carried out. The workpiece clamping turntables in other stations rotate normally to complete the work of their respective stations.

[0021] (3) The outer side of the pressure rod of the present invention is fitted with a spring, and the top of the pressure rod is connected to a clamping plate. When the pressure rod of any station is engaged with the lifting groove, the clamping plate is placed in the lifting groove and the spring is in a compressed state. When the pushing component pushes the lifting groove and the lifting plate to move down, the clamping plate is no longer restricted. Under the action of the compressed spring, the pressure rod moves down until it contacts the top of the slender shaft, thereby realizing the clamping of the slender shaft by the engagement of the pressure rod and the protrusion. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] Figure 1 This is a three-dimensional representation of the present invention according to one or more embodiments. Figure 1 ;

[0024] Figure 2 This is a three-dimensional representation of the present invention according to one or more embodiments. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the contact between the pressure rod and the workpiece according to one or more embodiments of the present invention;

[0026] Figure 4 This is a schematic diagram of the turntable drive mechanism according to one or more embodiments of the present invention.

[0027] Among them, 1. Main rotary table, 2. Main rotating shaft, 3. Top plate, 4. Workpiece clamping turntable, 5. Slender shaft, 6. Pressure rod, 7. Spring, 8. Lifting groove, 9. Electric push rod, 10. Turntable motor, 11. Drive pulley, 12. Belt, 13. Belt tensioning device, 14. Clamping plate, 15. Lifting plate, 16. Guide sleeve, 17. Partition plate, 18. Driven pulley, 19. Rotary motor. Detailed Implementation

[0028] Example 1:

[0029] In a typical embodiment of the present invention, such as Figure 1 and Figure 2 As shown, a slender shaft clamping device for use in a multi-station rotary table shot peening machine is presented.

[0030] The above-mentioned slender shaft clamping device will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1 As shown, the slender shaft clamping device includes a main rotary table 1, a top plate 3, a workpiece clamping turntable 4, a turntable drive mechanism, a pressure rod 6, etc. The main rotary table 1 has a main rotating shaft 2 installed at its center, and a drive motor is connected through the main rotating shaft 2 to realize the rotation of the main rotary table 1.

[0032] The main rotary table 1 is disc-shaped, and the main rotating shaft 2 is vertically arranged. The upper surface of the main rotary table 1 is divided into multiple workstations by multiple support partitions 17. In this embodiment, five support partitions 17 are evenly distributed around the main rotating shaft 2 to form five workstations. In one of the five workstations, the robot arm automatically loads and unloads the parts—the processed parts are picked up from the shot peening machine, the parts to be processed are picked up by the external clamp of the shot peening machine and moved to the loading and unloading workstation, and then the processed parts that have been picked up are placed in the empty conveyor line clamp. One workstation completes the blowing work, and the remaining workstations are shot peening workstations.

[0033] Understandably, in other embodiments, the number of support partitions 17 may be adjusted to other values.

[0034] The tops of each supporting partition 17 are connected by a top plate 3, which is a ring structure and rotates together with the main rotary table 1.

[0035] Each workstation is equipped with a workpiece clamping turntable 4, and each workpiece clamping turntable 4 is connected to the same turntable drive mechanism so that they can rotate synchronously. In the working state, the workpiece clamping turntable 4 rotates both around the main rotating shaft 2 with the main rotary table 1 and around its own axis.

[0036] like Figure 4 As shown, the turntable drive mechanism includes a turntable motor 10, a drive pulley 11, a belt 12, and driven pulleys 18. Each driven pulley 18 corresponds to a workpiece clamping turntable 4 and is located below the main rotary table 1. The workpiece clamping turntable 4 is connected to the driven pulleys 18. The drive pulley 11 is mounted on the turntable motor 10, and the drive pulley 11 is connected to each driven pulley 18 via a belt 12. Under the drive of the turntable motor 10, each driven pulley 18 drives the corresponding workpiece clamping turntable 4 to rotate.

[0037] To ensure that the belt 12 remains taut even when any driven pulley 18 disengages from the belt 12, a belt tensioning device 13 is installed on one side of the main rotary table 1. For example... Figure 4 As shown, the belt tensioning device 13 includes a tensioning wheel, the position of which can be adjusted by a spring.

[0038] The workpiece clamping turntable 4 has a tapered protrusion at its center, which holds the end of the slender shaft 5 in place. The top of the slender shaft 5 can be pressed down by the pressure rod 6. The bottom of the pressure rod 6 also has a tapered protrusion to accommodate the end structure of the slender shaft 5.

[0039] The end of the pressure rod 6 passes through the top plate 3 into the space formed by the support partition 17 and the main rotary table 1. The end of the pressure rod 6 is provided with a limiting protrusion so that the spring 7 can be sleeved on the section of the pressure rod 6 below the top plate 3 and will not come off the pressure rod 6. One end of the spring 7 abuts against the limiting protrusion and the other end abuts against the bottom surface of the top plate 3.

[0040] The pressure rod 6 extends out of the top plate 3 and upwards for a certain length. The top of the pressure rod 6 is connected to a clamping plate 14, which makes the top of the pressure plate 6 located in the lifting groove 8.

[0041] The lifting groove 8 is connected to the pushing component, and the lifting groove 8 and the pushing component are set together. The pushing component corresponds to the position of the main rotary table 1 near the edge. When the main rotary table 1 is located below the pushing component at any station, the center of the pushing component can correspond to the center of the pressure rod 6.

[0042] like Figure 2 As shown, the lifting groove 8 has an inverted U-shaped structure, with its closed end connected to the pushing component, so as to... Figure 2 The view shown is for reference only. The opening end of the lifting groove 8 faces downwards, and the side is a through structure, used for the pressure rod 6 to enter or leave the lifting groove 8 when it rotates with the main rotary table 1. Lifting plates 15 are symmetrically installed at the opening end of the lifting groove 8. There is a pressure rod holding space between the two lifting plates 15, and the size of the clamping plate 14 is larger than the pressure rod holding space, so that the lifting plates 15 can vertically limit the clamping plate 14 and prevent the pressure rod 6 from leaving the lifting groove 8 in the vertical direction.

[0043] The clamping plate 14 can be a round plate, a rectangular plate, or other shapes, as long as it can prevent the pressure rod 6 from coming off the lifting plate 15.

[0044] The pushing component enables the lifting groove 8 to move up and down. When the pressure rod 6 at any station is engaged with the lifting groove 8, the spring 7 is in a compressed state. When the pushing component pushes the lifting groove 8 down, the clamping plate 14 disengages from the lifting plate 15. Under the elastic force of the spring 7, the pressure rod 6 moves down until it contacts the top of the slender shaft 5, thus achieving the clamping of the slender shaft 5 by the engagement of the pressure rod 6 and the protrusion.

[0045] In this embodiment, the pushing component is an electric push rod 9, and the extension and retraction direction of the electric push rod 9 is along the axial direction of the main rotating shaft 2.

[0046] Of course, in other embodiments, the actuating component can also be a cylinder, as long as it has linear driving force.

[0047] Meanwhile, in order to ensure the coaxiality of the pressure rod 6 with the middle protrusion of the workpiece clamping turntable 4 under the action of the pushing component and the spring 7, a guide sleeve 16 is installed on the upper side of the top plate 3, and the pressure rod 6 passes through the guide sleeve 16.

[0048] For each part (slender shaft 5), a complete shot peening cycle is as follows: each shaft part to be processed is first clamped to the loading and unloading station, then passes through each shot peening station and the blowing station, and finally returns to the loading and unloading station, where it is clamped by the robot arm onto the workpiece conveyor line outside the shot peening machine.

[0049] The multi-station rotary shot peening machine equipped with the clamping device of this embodiment has four movements: two rotary movements and two linear movements. The two rotary movements are: the synchronous rotation of the main rotary table 1 and the top plate 3, realizing the rotation of multiple stations; and the rotation of the workpiece clamping turntable 4 in each station, realizing the rotation of the slender shaft 5 to meet the uniformity requirements of shot peening treatment on the workpiece surface. The two linear movements are: the up and down movement of the spray gun in each shot peening station, meeting the uniformity requirements of axial shot peening treatment on the slender shaft 5; and the up and down extension and retraction of the pressure rod 6, loading and unloading the workpiece to realize the loading and unloading of the workpiece.

[0050] In this embodiment, a pushing component is provided. As the main rotary table 1 rotates, the pressure rod 6 at the corresponding station engages with the lifting groove 8. Under the action of the pressure rod 6, spring 7, and pushing component, the slender shaft 5 is vertically clamped by the pressure rod 6 and the protrusion of the workpiece clamping turntable 4, so that the surface of the slender shaft 5 to be treated is fully exposed, which can improve the shot peening efficiency. At the same time, the vertical clamping makes it easy for the robot to grasp and remove the material, and it is easy to realize the full automation of loading and unloading.

[0051] Example 2:

[0052] This embodiment provides a working method for a slender shaft clamping device applied to a multi-station rotary table shot peening machine, using the device described in Embodiment 1, including:

[0053] A drive motor powers the rotation of the main rotating shaft 2, which is fixedly connected to the main rotary table 1 and the top plate 3 to ensure synchronous movement of the main rotary table 1 and the top plate 3. The turntable motor 10 powers the workpiece clamping turntable 4 via the drive pulley 11 and belt 12.

[0054] In operation, the workpiece clamping turntable 4 rotates both around the main rotating shaft 2 and around its own axis along with the main rotary table 1, driving the slender shaft 5 to both revolve and rotate. During loading and unloading, the main rotating shaft 2 (main rotary table 1) stops rotating. At the same time, in the loading and unloading station, the driven pulley 18 (not shown in the figure) coaxial with the workpiece clamping turntable 4 disengages from the belt 12, and the workpiece clamping turntable 4 stops rotating. At this time, loading and unloading operations are carried out. The workpiece clamping turntables 4 in other stations rotate normally to complete the work of their respective stations (such as shot peening, blowing, etc.).

[0055] When the slender shaft 5 is vertically clamped and placed on the central protrusion of the workpiece clamping turntable 4, the pressure rod 6 is directly above the axis of the slender shaft 5, and the electric push rod 9 is fixed to the turntable shot peening machine. During loading, the slender shaft 5 is first vertically clamped and placed on the central protrusion of the workpiece clamping turntable 4 by a robotic arm, such as... Figure 1 The middle workstation is shown.

[0056] Subsequently, the electric push rod 9 drives the lifting groove 8 and the lifting plate 15 to move downward in a straight line. The clamping plate 14 is no longer restricted. Under the action of the compressed spring 7, the pressure rod 6 moves downward until it contacts the top of the slender shaft 5. The tapered structure at the bottom of the pressure rod 6 mates with the tapered hole at the top of the part. The pressure rod 6 and the central protrusion of the workpiece clamping turntable 4 work simultaneously to vertically clamp the slender shaft. At this time, the electric push rod 9 continues to move downward, so that the lifting plate 15 is directly below the clamping plate 14, but the two do not contact each other.

[0057] Then, the drive motor that powers the rotation of the main rotating shaft 2 resumes operation. The main rotating shaft 2 rotates synchronously with the main rotary table 1 and the top plate 3. After rotating through a certain angle, the clamping plate 14 at the top of the pressure rod 6 leaves the space of the lifting groove 8, so that the lifting plate 15 is located diagonally below the clamping plate 14. At this time, Figure 1 The working state of the three workstations can be seen on the right side.

[0058] Meanwhile, the clamping plate 14 at the top of the pressure rod 6 in the next station gradually approaches and enters the lifting groove 8. Before the pressure rod 6 is directly below the electric push rod 9, the driven pulley 18, coaxial with the workpiece clamping turntable 4, has already disengaged from the belt and its rotation gradually stops. When the pressure rod 6 is directly below the electric push rod 9, the main rotary table 1 stops rotating, meaning that the workpiece clamping turntable 4 in the loading and unloading station is stationary. At this time, the main rotary table 1 has rotated 72° (360° / n, where n is the number of stations; taking a five-station station as an example).

[0059] The workpiece, having just finished shot peening and blowing, arrives at the station directly below the electric push rod 9 (i.e., the loading / unloading station). At this time, the top clamping plate 14 of the pressure rod 6, which is holding the workpiece, enters the space of the lifting groove 8, positioned directly above the lifting plate 15, but not in contact with it. The external robot arm of the shot peening machine grips the part. Then, the electric push rod 9 moves upward in a straight line. When the lifting plate 15 contacts the top clamping plate 14 of the pressure rod 6, the electric push rod 9 begins to work against gravity and the elastic force of the spring 7 until the bottom cone tip of the pressure rod 6 leaves the top cone hole of the slender shaft 5 a certain distance away. The robot arm, which has gripped the part, lifts the part upward and rotates it away from the station.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An elongated shaft clamping device applied to a multi-station tumbler shot blasting machine, characterized in that, The main rotary workbench is connected with rotary power, and is circumferentially divided into multiple workstations by multiple support partitions, and each workstation is provided with a workpiece clamping rotary table, and each workpiece clamping rotary table is connected with a same rotary table driving mechanism, and the workpiece clamping rotary table is provided with a protrusion for abutting against one end of the elongated shaft; The workpiece clamping rotary table is provided with a pressing rod above the workpiece clamping rotary table, and a rod segment of the pressing rod in the main rotary workbench is sleeved with a spring, and a top end of the pressing rod is connected with a clamping plate; the main rotary workbench is provided with a pushing component above the main rotary workbench, and the pushing component is connected with a lifting groove, and the pushing component drives the lifting groove to move downward to cooperate with the pressing rod of any workstation, and the lifting groove can be separated from the pressing rod which cooperates with the lifting groove when the main rotary workbench rotates; The main rotary workbench is connected with a rotary motor; the rotary table driving mechanism comprises a rotary table motor and a driving pulley mounted on the rotary table motor, and each workpiece clamping rotary table is connected with a driven pulley, and each driven pulley is connected with the driving pulley through a belt; The belt is further connected with a belt tensioning device, and when the workpiece is fed or discharged, the main rotary workbench stops rotating, and at the same time, the driven pulley coaxial with the workpiece clamping rotary table in the feeding or discharging workstation is separated from the belt, and the workpiece clamping rotary table stops rotating, and at this time, the feeding or discharging work is carried out, and the workpiece clamping rotary tables in the remaining workstations rotate normally.

2. The elongated shaft clamping device applied to the multi-station rotary table shot blasting machine according to claim 1, characterized in that, The lifting groove has an inverted U-shaped structure, and opposite ends of the opening of the lifting groove are provided with lifting plates, and a pressing rod clamping space is formed between the two lifting plates; the clamping plate is larger than the pressing rod clamping space.

3. The elongated shaft clamping device applied to the multi-station rotary table shot blasting machine according to claim 1, characterized in that, The top of each support partition is connected through a top plate, and a guide sleeve is mounted on the top plate corresponding to each workstation, and the pressing rod passes through the guide sleeve.

4. The elongated shaft clamping device applied to the multi-station rotary table shot blasting machine according to claim 1 or 3, characterized in that, A main rotating shaft is mounted at the center of the main rotary workbench, and the axis of each pressing rod is parallel to the main rotating shaft to axially press the elongated shaft.

5. The elongated shaft clamping device for use in a multi-station tumbler shot blasting machine according to claim 1, characterized in that, The protrusion is a conical protrusion, and is located at the center of the workpiece clamping rotary table.

6. The elongated shaft clamping device for use in a multi-station tumbler shot blasting machine according to claim 1, characterized in that, The pushing component adopts an electric push rod or an air cylinder.

7. The working method of the elongated shaft clamping device applied to the multi-station rotary table shot blasting machine according to any one of claims 1-6, characterized in that, In the working state, the workpiece clamping rotary table rotates with the main rotary workbench and rotates around its own axis, and drives the elongated shaft to revolve and rotate; When the workpiece is fed or discharged, the main rotary workbench stops rotating, and at the same time, the driven pulley coaxial with the workpiece clamping rotary table in the feeding or discharging workstation is separated from the belt, and the workpiece clamping rotary table stops rotating, and at this time, the feeding or discharging work is carried out; the workpiece clamping rotary tables in the remaining workstations rotate normally to complete the work of the respective workstations. When the workpiece is fed, the elongated shaft is first vertically clamped and placed on the protrusion of the workpiece clamping rotary table by the mechanical hand, the pushing component drives the lifting groove and the lifting plate to move downward in a straight line, the clamping plate is no longer limited, and under the action of the compressed spring, the pressing rod moves downward until the top end of the elongated shaft is contacted, so that the elongated shaft is vertically clamped between the pressing rod and the protrusion.

8. A method of operating an elongated shaft clamping device for a multi-station rotary table shot blasting machine according to claim 7, characterized in that, ​

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