A positioning device
By using a positioning device consisting of a rail and a pushing mechanism in the machining of shaft bars, precise positioning of the shaft bar blanks was achieved, solving the problem of inaccurate position and angle during loading operations and improving machining safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SIEMENS STANDARD MOTORS LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-07-14
Smart Images
Figure CN224488490U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automated processing technology, and in particular to a positioning device. Background Technology
[0002] In industrial applications, shafts are a common type of mechanical component, such as motor rotor shafts. Shafts are generally made from cylindrical shaft blanks. During the shaft processing, a loading operation is required, that is, the shaft blank is first placed into the equipment used to process the shaft (such as a machine tool).
[0003] Currently, during the loading operation of shaft processing, the shaft blank placed outside the aforementioned equipment is directly clamped by the grippers of the aforementioned equipment, and the clamped shaft blank is moved by the grippers until it is placed into the aforementioned equipment.
[0004] However, due to the low precision in the placement and angle of the shaft blanks outside the aforementioned equipment, the clamps are more prone to misalignment when holding the shaft blanks. This can easily lead to quality and safety accidents such as the shaft blanks falling off the clamps or the shaft blanks in the aforementioned equipment becoming misaligned, resulting in poor safety during the loading operation of shaft processing. Utility Model Content
[0005] In view of this, the positioning device provided in this application can improve the safety of the loading operation in the shaft bar processing process.
[0006] This application provides a positioning device for loading and positioning cylindrical shaft blanks in a shaft machining process. The positioning device includes a worktable, at least one rail, a first limiting member, and a pushing mechanism. One side of the worktable is a working plane. When the positioning device is in operation, the working plane is the top surface of the worktable and is horizontal. The rail is connected to the working plane, and the length direction of the rail is not perpendicular to the working plane. The side of the rail away from the working plane is used to place the shaft blank. A second limiting member is provided at the first end of the rail, and the second limiting member is located away from the working plane. The distance between the end face of the working plane and the working plane is greater than the distance between the side of the first end of the rail away from the working plane and the working plane; the first limiting member is connected to the working plane; the pushing mechanism is connected to the working plane, and the rail is located between the first limiting member and the pushing mechanism. When the shaft blank is placed on the rail and the side wall of the shaft blank abuts against the second limiting member, the pushing mechanism pushes the first end of the shaft blank to move the shaft blank closer to the first limiting member until the end face of the second end of the shaft blank abuts against the first limiting member.
[0007] In one possible implementation, the distance between the side of the rail away from the working plane and the working plane gradually increases along the direction from the first end of the rail to the second end of the rail.
[0008] In one possible implementation, there are multiple rail bodies, the length directions of the multiple rail bodies are parallel to each other, and the multiple rail bodies are arranged on the same straight line, which is parallel to the working plane and perpendicular to the length direction of the rail bodies.
[0009] In one possible implementation, a seat is provided between the rail and the working plane, and the rail is cylindrical; the seat is connected to the working plane, the rail is rotatably connected to the seat, and the axis of rotation of the rail relative to the seat coincides with the axis of the rail.
[0010] In one possible implementation, a base is provided between the seat and the working plane; the base is connected to the working plane, the seat is connected to the base, and the second limiting member is connected to the base.
[0011] In one possible implementation, the pushing mechanism includes a cylinder and a push plate; the cylinder barrel is connected to the working plane, the length direction of the cylinder piston rod is perpendicular to the length direction of the rail body, and the length direction of the cylinder piston rod is parallel to the working plane; the push plate is connected to the end of the cylinder piston rod away from the cylinder barrel, the thickness direction of the push plate is parallel to the length direction of the cylinder piston rod, and when the shaft blank is placed on the rail body, and the side wall of the shaft blank abuts against the second limiting member, at least a portion of the side of the push plate away from the cylinder barrel is opposite to at least a portion of the end face of the first end of the shaft blank.
[0012] In one possible implementation, a first sensor is connected to the working plane, and the first sensor is electrically connected to a controller, which is electrically connected to the cylinder. The distance between the side of the first sensor away from the working plane and the working plane is less than the minimum distance between the side of the rail away from the working plane and the working plane. When the shaft blank is placed on the rail and the side wall of the shaft blank abuts against the second limiting member, the first sensor is located between the shaft blank and the working plane, and the distance between the first sensor and the shaft blank is a first distance. When the first sensor detects that the distance between the first sensor and the shaft blank is equal to the first distance, the controller controls the cylinder to drive the push plate to move, so that the push plate pushes the first end of the shaft blank to move the shaft blank closer to the first limiting member until the end face of the second end of the shaft blank abuts against the first limiting member.
[0013] In one possible implementation, a second sensor is connected to the working plane and electrically connected to the controller. When the shaft blank is placed on the rail and the side wall of the shaft blank abuts against the second limiting member, the second sensor faces the end face of the second end of the shaft blank. When the end face of the second end of the shaft blank abuts against the first limiting member, the distance between the second sensor and the end face of the second end of the shaft blank is a second distance. When the second sensor detects that the distance between the second sensor and the end face of the second end of the shaft blank is equal to the second distance, the controller controls the cylinder to stop driving the push plate.
[0014] In one possible implementation, the first limiting member is plate-shaped, and the thickness direction of the first limiting member is perpendicular to the length direction of the rail body.
[0015] In one possible implementation, the second limiting member is plate-shaped, and the thickness direction of the second limiting member is parallel to the working plane.
[0016] As can be seen from the above technical solution, by adopting a positioning device including a rail body, a rail body with a second limiting member, a first limiting member, and a pushing mechanism, during the processing of the shaft bar, the shaft bar blank can first be placed on the side of the rail body away from the working plane by tools such as a robot arm, and the side wall of the shaft bar blank abuts against the second limiting member. Then, the pushing mechanism can push the first end of the shaft bar blank to move the shaft bar blank closer to the first limiting member until the end face of the second end of the shaft bar blank abuts against the first limiting member. At this time, the positioning of the shaft bar blank is completed. The equipment used for processing the shaft bar can then use grippers to pick up the shaft bar blank from the positioning device and enter the interior of the equipment to complete the loading operation. Therefore, when the second end of the shaft blank on the positioning device abuts against the first limiting member, and the side wall of the shaft blank abuts against the second limiting member, the placement position and angle of the shaft blank can be more accurate, thereby reducing the possibility of the shaft blank falling off or tilting when it is loaded onto the equipment used to process shafts, and improving the safety of loading operations during shaft processing. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the positioning device for placing a shaft bar blank provided in an embodiment of this application;
[0018] Figure 2 This is a schematic diagram of the positioning device for a blank without a shaft provided in an embodiment of this application.
[0019] List of reference numerals in the attached diagram:
[0020] 1: Shaft blank 2: Worktable 21: Working plane
[0021] 3: Track body; 31: Second limiting component; 4: First limiting component
[0022] 5: Pushing mechanism 51: Cylinder 52: Push plate
[0023] 6: Base body; 7: Socket; 8: First sensor
[0024] 9: Second sensor Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0026] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0027] As mentioned earlier, shafts are a common type of mechanical component in industrial applications, such as motor rotor shafts. Shafts are generally machined from cylindrical shaft blanks. The machining process requires a loading operation, where the shaft blank is placed into the machining equipment (e.g., a machine tool). Currently, the loading operation for shaft machining involves the grippers of this equipment directly holding the shaft blank placed outside the equipment. The grippers then move the held shaft blank until it is placed into the equipment. However, the placement position and angle of the shaft blank outside the equipment are not very precise, making it easy for the grippers to misalign. This can easily lead to quality and safety accidents such as the shaft blank falling off the grippers or misalignment of the shaft blank in the equipment, resulting in poor safety during the loading operation of shaft machining.
[0028] In this embodiment, by employing a positioning device comprising a rail body, a rail body with a second limiting member, a first limiting member, and a pushing mechanism, during the processing of the shaft bar, the shaft bar blank can first be placed on the side of the rail body away from the working plane using tools such as a robotic arm, and the side wall of the shaft bar blank abuts against the second limiting member. Then, the pushing mechanism can push the first end of the shaft bar blank to move the shaft bar blank closer to the first limiting member until the end face of the second end of the shaft bar blank abuts against the first limiting member. At this point, the positioning of the shaft bar blank is completed, and the equipment used for processing the shaft bar can then use grippers to pick up the shaft bar blank from the positioning device and enter the interior of the equipment to complete the loading operation. Therefore, when the second end of the shaft blank on the positioning device abuts against the first limiting member, and the side wall of the shaft blank abuts against the second limiting member, the placement position and angle of the shaft blank can be more accurate, thereby reducing the possibility of the shaft blank falling off or tilting when it is loaded onto the equipment used to process shafts, and improving the safety of loading operations during shaft processing.
[0029] The positioning device provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0030] Figure 1This is a schematic diagram of the positioning device for placing a pre-loaded shaft blank, as provided in an embodiment of this application. Figure 1 As shown, the positioning device provided in this application embodiment is used to position a cylindrical shaft blank 1 in the shaft processing process. The shaft is, for example, a motor rotor shaft, which is generally processed from the shaft blank 1. The positioning device includes: a worktable 2, at least one rail 3, a first limiting member 4, and a pushing mechanism 5.
[0031] One side of the workbench 2 is the working plane 21. When the positioning device is in working condition, the working plane 21 is the top surface of the workbench 2 and is in a horizontal state.
[0032] The rail body 3 is connected to the working plane 21. The length direction of the rail body 3 is not perpendicular to the working plane 21. The side of the rail body 3 away from the working plane 21 is used to place the shaft blank 1. A second limiting member 31 is provided at the first end of the rail body 3. The distance between the end face of the second limiting member 31 away from the working plane 21 and the working plane 21 is greater than the distance between the side of the first end of the rail body 3 away from the working plane 21 and the working plane 21. The first end of the rail body 3 and the second end of the rail body 3 mentioned later are the two ends of the length direction of the rail body 3, respectively.
[0033] The first limiting component 4 is connected to the working plane 21;
[0034] The pushing mechanism 5 is connected to the working plane 21. The rail body 3 is located between the first limiting member 4 and the pushing mechanism 5. When the shaft blank 1 is placed on the rail body 3 and the side wall of the shaft blank 1 abuts against the second limiting member 31, the pushing mechanism 5 pushes the first end of the shaft blank 1 to move the shaft blank 1 closer to the first limiting member 4 until the end face of the second end of the shaft blank 1 abuts against the first limiting member 4. The first end and the second end of the shaft blank 1 are the two ends of the shaft blank 1 in the length direction, respectively.
[0035] In this embodiment of the application, during the processing of the shaft bar, the shaft bar blank 1 can first be placed on the side of the rail body 3 away from the working plane 21 by a tool such as a robot, and the side wall of the shaft bar blank 1 abuts against the second limiting member 31. Then, the pushing mechanism 5 can push the first end of the shaft bar blank 1 to move the shaft bar blank 1 towards the first limiting member 4 until the end face of the second end of the shaft bar blank 1 abuts against the first limiting member 4. At this time, the positioning of the shaft bar blank 1 is completed. The equipment used to process the shaft bar (the equipment that processes the shaft bar blank 1 into a shaft bar, such as a machine tool) can use the gripper to pick up the shaft bar blank 1 from the positioning device and enter the interior of the equipment to complete the loading operation. Therefore, when the second end of the shaft blank 1 on the positioning device abuts against the first limiting member 4, and the side wall of the shaft blank 1 abuts against the second limiting member 31, the placement position and angle of the shaft blank 1 can be more accurate, thereby reducing the possibility of the shaft blank 1 falling off or tilting when it is loaded onto the equipment used to process shafts, and improving the safety of loading operations during shaft processing.
[0036] Furthermore, compared to the method of pausing the operation during the loading process of shaft bar processing and manually correcting the position and angle of the shaft bar blank 1, the positioning device in this application can reduce the possibility of the shaft bar blank 1 becoming skewed, thereby reducing the number of times the shaft bar blank 1 needs to be manually corrected, or even eliminating the need for manual correction of the shaft bar blank 1, thus improving the efficiency of shaft bar processing.
[0037] In one possible implementation, such as Figure 2 As shown, along the direction from the first end of the rail body 3 to the second end of the rail body 3, the distance between the side of the rail body 3 away from the working plane 21 and the working plane 21 gradually increases.
[0038] Therefore, after the shaft blank 1 is placed on the side of the rail body 3 away from the working plane 21, due to the gravity of the shaft blank 1, the shaft blank 1 can automatically roll or slide along the direction from the second end of the rail body 3 to the first end of the rail body 3 until the side wall of the shaft blank 1 abuts against the second limiting member 31. There is no need to manually control the side wall of the shaft blank 1 to abut against the second limiting member 31, which is convenient, quick and improves positioning efficiency.
[0039] In one possible implementation, such as Figure 2 As shown, there are multiple rail bodies 3, and the length directions of the multiple rail bodies 3 are parallel to each other. The multiple rail bodies 3 are arranged on the same straight line, which is parallel to the working plane 21 and perpendicular to the length direction of the rail bodies 3.
[0040] Therefore, when the shaft blank 1 is placed on the side of the rail body 3 away from the working plane 21, the sides of the multiple rail bodies 3 away from the working plane 21 can all contact the shaft blank 1. The multiple rail bodies 3 have a larger supporting area for the shaft blank 1, which can reduce the possibility of the shaft blank 1 slipping or rolling off the multiple rail bodies 3.
[0041] In one possible implementation, such as Figure 2 As shown, a seat 6 is provided between the rail body 3 and the working plane 21. The rail body 3 is cylindrical. The seat 6 is connected to the working plane 21, and the rail body 3 is rotatably connected to the seat 6. The rotation axis of the rail body 3 relative to the seat 6 coincides with the axis of the rail body 3.
[0042] In this embodiment of the application, when the pushing mechanism 5 pushes the first end of the shaft blank 1 to move the shaft blank 1 toward the first limiting member 4, the rail body 3 can rotate relative to the seat body 6 under the drive of the shaft blank 1, thereby reducing the resistance of the rail body 3 to the movement of the shaft blank 1 and thus reducing the possibility of damage to the positioning device.
[0043] In one possible implementation, such as Figure 2 As shown, a base 7 is provided between the seat body 6 and the working plane 21; the base 7 is connected to the working plane 21, and this connection can be, for example, a fixed connection or a detachable connection, etc. The seat body 6 is connected to the base 7, and this connection can be, for example, a fixed connection or a detachable connection, etc. The second limiting member 31 is connected to the base 7, and this connection can be, for example, a fixed connection or a detachable connection, etc., so as to realize that the second limiting member 31 is provided at the first end of the rail body 3.
[0044] Therefore, during the assembly of the positioning device, the second limiting member 31 and the seat 6 can be connected to the base 7, and then the base 7 can be connected to the working plane 21, which facilitates assembly and improves assembly efficiency.
[0045] In one possible implementation, such as Figure 2 As shown, the second limiting member 31 is plate-shaped, and the thickness direction of the second limiting member 31 is parallel to the working plane 21.
[0046] Therefore, when the side wall of the shaft blank 1 abuts against the second limiting member 31, the side wall of the shaft blank 1 abuts against the plate surface of the second limiting member 31 near the shaft blank 1. Thus, the plate-shaped second limiting member 31 can save as much material as possible while also making the contact area between the shaft blank 1 and the second limiting member 31 larger, reducing the possibility of the shaft blank 1 or the second limiting member 31 being scratched or damaged.
[0047] Optionally, such as Figure 2As shown, the first limiting member 4 can be connected to the working plane 21 by means of fixed connection or detachable connection.
[0048] In one possible implementation, such as Figure 2 As shown, the first limiting member 4 is plate-shaped, and the thickness direction of the first limiting member 4 is perpendicular to the length direction of the rail body 3.
[0049] Therefore, when the end face of the second end of the shaft blank 1 abuts against the first limiting member 4, the end face of the second end of the shaft blank 1 abuts against the plate surface of the first limiting member 4 near the pushing mechanism 5. Thus, the plate-shaped first limiting member 4 can save as much material as possible while also making the contact area between the shaft blank 1 and the first limiting member 4 larger, thereby improving the positional stability of the shaft blank 1 after positioning.
[0050] In one possible implementation, such as Figure 1 As shown, the pushing mechanism 5 includes a cylinder 51 and a push plate 52; the cylinder barrel of the cylinder 51 is connected to the working plane 21, and this connection can be, for example, a fixed connection or a detachable connection, etc. The length direction of the piston rod of the cylinder 51 is perpendicular to the length direction of the rail body 3, and the length direction of the piston rod of the cylinder 51 is parallel to the working plane 21; the push plate 52 is connected to the end of the piston rod of the cylinder 51 away from the cylinder barrel of the cylinder 51, and the thickness direction of the push plate 52 is parallel to the length direction of the piston rod of the cylinder 51. When the shaft blank 1 is placed on the rail body 3, and the side wall of the shaft blank 1 abuts against the second limiting member 31, at least a portion of the side of the push plate 52 away from the cylinder barrel is opposite to at least a portion of the end face of the first end of the shaft blank 1.
[0051] In this embodiment, after the shaft blank 1 is placed on the rail 3 and its side wall abuts against the second limiting member 31, the cylinder 51 can drive the push plate 52 to approach the first end of the shaft blank 1. After the push plate 52 abuts against the first end of the shaft blank 1, the cylinder 51 continues to push the push plate 52, so that the push plate 52 pushes the shaft blank 1 to move closer to the first limiting member 4, thereby realizing the pushing mechanism 5 pushing the shaft blank 1 to move closer to the first limiting member 4. Thus, the pushing mechanism 5 can be realized by combining the cylinder 51 and the push plate 52, which has a simple structure and low cost.
[0052] In one possible implementation, such as Figure 1 and Figure 2As shown, a first sensor 8 is connected to the working plane 21. The first sensor 8 can be a proximity sensor, etc. The first sensor 8 is electrically connected to a controller, and the controller is electrically connected to the cylinder 51. The distance between the side of the first sensor 8 away from the working plane 21 and the working plane 21 is less than the minimum distance between the side of the rail body 3 away from the working plane 21 and the working plane 21, so that the first sensor 8 avoids the shaft blank 1 placed on the rail body 3. When the shaft blank 1 is placed on the rail body 3, and the side wall of the shaft blank 1 is in contact with the second limit... When part 31 comes into contact, the first sensor 8 is located between the shaft blank 1 and the working plane 21, and the distance between the first sensor 8 and the shaft blank 1 is the first distance. When the first sensor 8 detects that the distance between the first sensor 8 and the shaft blank 1 is equal to the first distance, the controller controls the cylinder 51 to drive the push plate 52 to move, so that the push plate 52 pushes the first end of the shaft blank 1 to move the shaft blank 1 towards the first limiting member 4, until the end face of the second end of the shaft blank 1 comes into contact with the first limiting member 4.
[0053] Therefore, by using the first sensor 8, the cylinder 51 can automatically drive the push plate 52 to perform actions, thereby improving the positioning efficiency of the positioning device.
[0054] In one possible implementation, such as Figure 1 and Figure 2 As shown, a second sensor 9 is connected to the working plane 21. The second sensor 9 can be a proximity sensor or the like. The second sensor 9 is electrically connected to the controller. When the shaft blank 1 is placed on the rail body 3 and the side wall of the shaft blank 1 abuts against the second limiting member 31, the second sensor 9 is opposite to the end face of the second end of the shaft blank 1. When the end face of the second end of the shaft blank 1 abuts against the first limiting member 4, the distance between the second sensor 9 and the end face of the second end of the shaft blank 1 is the second distance. When the second sensor 9 detects that the distance between the second sensor 9 and the end face of the second end of the shaft blank 1 is equal to the second distance, the controller controls the cylinder 51 to stop driving the push plate 52.
[0055] Therefore, by using the second sensor 9, the cylinder 51 can be automatically stopped to drive the push plate 52 to move, thereby improving the positioning efficiency of the positioning device.
[0056] Optionally, such as Figure 1 and Figure 2As shown, when the second sensor 9 detects that the distance between the second sensor 9 and the end face of the second end of the shaft blank 1 is equal to the second distance, that is, when the positioning device has completed positioning of the shaft blank 1, the second sensor 9 can output a signal to the controller to indicate that the distance between the second sensor 9 and the end face of the second end of the shaft blank 1 is equal to the second distance. In response to the signal, the controller controls the gripper of the equipment for processing the shaft to clamp the shaft blank 1, and then controls the cylinder 51 to drive the push plate 52 away from the shaft blank 1, and then controls the gripper to drive the shaft blank 1 to move into the above-mentioned equipment, so as to realize automated loading operation, save labor costs, and improve loading efficiency.
[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0058] Finally, it should be noted that the above are merely preferred embodiments of the present invention, used only to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.
Claims
1. A positioning device for loading and positioning a cylindrical shaft blank (1) during a shaft machining process, characterized in that, The positioning device includes a worktable (2), at least one rail (3), a first limiting member (4), and a pushing mechanism (5); One side of the workbench (2) is a working plane (21). When the positioning device is in working condition, the working plane (21) is the top surface of the workbench (2) and is in a horizontal state. The rail (3) is connected to the working plane (21). The length direction of the rail (3) is not perpendicular to the working plane (21). The side of the rail (3) away from the working plane (21) is used to place the shaft blank (1). A second limiting member (31) is provided at the first end of the rail (3). The distance between the end face of the second limiting member (31) away from the working plane (21) and the working plane (21) is greater than the distance between the side of the first end of the rail (3) away from the working plane (21) and the working plane (21). The first limiting member (4) is connected to the working plane (21); The pushing mechanism (5) is connected to the working plane (21). The rail body (3) is located between the first limiting member (4) and the pushing mechanism (5). When the shaft blank (1) is placed on the rail body (3) and the side wall of the shaft blank (1) abuts against the second limiting member (31), the pushing mechanism (5) pushes the first end of the shaft blank (1) to move the shaft blank (1) closer to the first limiting member (4) until the end face of the second end of the shaft blank (1) abuts against the first limiting member (4).
2. The positioning device according to claim 1, characterized in that, Along the direction from the first end of the rail (3) to the second end of the rail (3), the distance between the side of the rail (3) away from the working plane (21) and the working plane (21) gradually increases.
3. The positioning device according to claim 1 or 2, characterized in that, The number of rail bodies (3) is multiple, the length directions of the multiple rail bodies (3) are parallel to each other, the multiple rail bodies (3) are arranged on the same straight line, the straight line is parallel to the working plane (21) and perpendicular to the length direction of the rail bodies (3).
4. The positioning device according to claim 3, characterized in that, A seat (6) is provided between the rail (3) and the working plane (21), and the rail (3) is cylindrical; The seat (6) is connected to the working plane (21), the rail (3) is rotatably connected to the seat (6), and the rotation axis of the rail (3) relative to the seat (6) coincides with the axis of the rail (3).
5. The positioning device according to claim 4, characterized in that, A base (7) is provided between the seat (6) and the working plane (21); The base (7) is connected to the working plane (21), the seat (6) is connected to the base (7), and the second limiting member (31) is connected to the base (7).
6. The positioning device according to claim 1, characterized in that, The pushing mechanism (5) includes a cylinder (51) and a push plate (52); The cylinder barrel of the cylinder (51) is connected to the working plane (21), the length direction of the piston rod of the cylinder (51) is perpendicular to the length direction of the rail body (3), and the length direction of the piston rod of the cylinder (51) is parallel to the working plane (21). The push plate (52) is connected to the end of the piston rod of the cylinder (51) away from the cylinder barrel. The thickness direction of the push plate (52) is parallel to the length direction of the piston rod of the cylinder (51). When the shaft blank (1) is placed on the rail body (3) and the side wall of the shaft blank (1) abuts against the second limiting member (31), at least a portion of the side of the push plate (52) away from the cylinder barrel is opposite to at least a portion of the end face of the first end of the shaft blank (1).
7. The positioning device according to claim 6, characterized in that, A first sensor (8) is connected to the working plane (21), and the first sensor (8) is electrically connected to a controller, which is electrically connected to the cylinder (51). The distance between the side of the first sensor (8) away from the working plane (21) and the working plane (21) is less than the minimum distance between the side of the rail body (3) away from the working plane (21) and the working plane (21). When the shaft blank (1) is placed on the rail body (3) and the side wall of the shaft blank (1) abuts against the second limiting member (31), the first sensor (8) is located between the shaft blank (1) and the working plane (21), and the distance between the first sensor (8) and the shaft blank (1) is the first distance. When the first sensor (8) detects that the distance between the first sensor (8) and the shaft blank (1) is equal to the first distance, the controller controls the cylinder (51) to drive the push plate (52) to move, so that the push plate (52) pushes the first end of the shaft blank (1) to move the shaft blank (1) closer to the first limiting member (4) until the end face of the second end of the shaft blank (1) abuts against the first limiting member (4).
8. The positioning device according to claim 7, characterized in that, A second sensor (9) is connected to the working plane (21), and the second sensor (9) is electrically connected to the controller; When the shaft blank (1) is placed on the rail body (3) and the side wall of the shaft blank (1) abuts against the second limiting member (31), the second sensor (9) is opposite to the end face of the second end of the shaft blank (1). When the end face of the second end of the shaft blank (1) abuts against the first limiting member (4), the distance between the second sensor (9) and the end face of the second end of the shaft blank (1) is the second distance. When the second sensor (9) detects that the distance between the end faces of the second sensor (9) and the second end of the shaft blank (1) is equal to the second distance, the controller controls the cylinder (51) to stop driving the push plate (52) to move.
9. The positioning device according to claim 1, characterized in that, The first limiting member (4) is plate-shaped, and the thickness direction of the first limiting member (4) is perpendicular to the length direction of the rail body (3).
10. The positioning device according to claim 1, characterized in that, The second limiting member (31) is plate-shaped, and the thickness direction of the second limiting member (31) is parallel to the working plane (21).