Double station shafting machine

Abstract

The utility model belongs to shaft -in machine technical field discloses a double -station shaft -in machine, including frame, fixed mounting has rotary drive subassembly on the frame, and the output of rotary drive subassembly is connected with station disc, and rotary drive subassembly is used for driving station disc to carry out intermittent index rotation, the station disc is evenly provided with two stations along the circumferential direction, and two stations include press -in station and blanking detection station, and the main pressure mechanism of fixed mounting of frame is located in press -in station directly above, and the output of main pressure mechanism is set down vertically. The utility model adopts initiative vibration suppression mode and reduces the load deformation and vibration amplitude of frame from the root, ensures the perpendicularity and concentricity of main pressure mechanism pressure equipment process, is especially applicable to the scene of extremely high assembly precision. At the same time, double -station layout combines intermittent rotation, realizes the parallel operation of pressure equipment and detection / feeding and discharging, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shaft insertion machine technology, and in particular to a dual-station shaft insertion machine. Background Technology

[0002] In industries such as motor manufacturing, gearbox assembly, and precision instruments, it is often necessary to precisely press shaft parts (hereinafter referred to as "shafts") into the holes of housings, bearings, or gears. This process is called "shaft insertion" or "shaft pressing." The quality of this process directly affects the concentricity, transmission smoothness, and overall service life of the product.

[0003] Traditional single-station press-fitting equipment generates a huge downward impact force the moment the shaft is pressed in. The reaction force is fed back upwards through the machine frame, causing overall vibration. This vibration not only leads to micron-level deviations in the pressing position, affecting the concentricity and perpendicularity of the press-fitting process, but can also damage assembled components. This vibration problem is particularly prominent in high-precision assembly scenarios. Current technologies for suppressing press-fitting vibration mostly employ passive damping methods, such as adding vibration damping pads to the bottom of the equipment. These methods primarily absorb low-frequency vibrations and have limited effectiveness in suppressing the instantaneous, high-intensity impact force and its reaction torque generated during press-fitting. They are passive buffers and cannot actively counteract the reaction force acting on the machine frame. Therefore, they cannot completely eliminate the problem of press-fitting spindle deflection caused by machine frame deformation or slight vibration, thus hindering further improvements in assembly accuracy. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a dual-station shaft insertion machine that actively counteracts the pressing reaction force, suppresses vibration, and improves assembly accuracy.

[0005] The technical solution adopted by this utility model is: a dual-station shaft insertion machine, including a frame, on which a rotary drive assembly is fixedly installed. The output end of the rotary drive assembly is connected to a station plate, and the rotary drive assembly is used to drive the station plate to perform intermittent indexing rotary motion. Two stations are evenly arranged along the circumferential direction on the station plate. The two stations include a pressing station and a material unloading and detection station. A main pressure mechanism located directly above the pressing station is fixedly installed on the frame. The output end of the main pressure mechanism is vertically downward. A balancing and vibration damping mechanism located directly above the material unloading and detection station is also fixedly installed on the frame. The structure and stroke of the balancing and vibration damping mechanism are the same as those of the main pressure mechanism, and it can perform synchronous motion in the opposite direction to the main pressure mechanism under the synchronous control of the electronic control system.

[0006] Preferably, both the main pressure mechanism and the balancing vibration damping mechanism are servo screw-slider mechanisms.

[0007] Preferably, the outer wall of the frame is provided with a fixed bracket, and the top of the fixed bracket is provided with a vision positioning module, which includes an industrial camera and a ring light source.

[0008] Preferably, the workstation is provided with a plurality of cross slides arranged in a ring and equidistantly, and a workstation fixture is connected to the cross slides via sliders; the workstation fixture includes a base connected to the sliders of the cross slides, and at least one pair of pneumatic fingers are mounted on the base, with an elastic pad connected to the output end of the pneumatic fingers.

[0009] Preferably, the cross slide is a ball screw slide driven by a servo motor.

[0010] Preferably, the pressure output end of the main pressure mechanism is provided with a pressure detection component, which includes a pressure sensing unit, a displacement sensing unit, a data acquisition unit, and an embedded processor.

[0011] Preferably, an industrial robot or a three-coordinate gantry robot is installed next to both the fixed bracket and the unloading and inspection station.

[0012] Preferably, the rotary drive component is a DD direct drive motor.

[0013] The beneficial effects of this utility model are: A balancing vibration damping mechanism with the same structure as the main pressure mechanism is installed directly above the unloading and inspection station opposite the pressing station. This mechanism moves in precise, synchronous, and opposite directions with the main pressure mechanism under the control of the electronic control system. When the main pressure mechanism performs a downward pressing action, generating a downward force, the balancing vibration damping mechanism moves upward synchronously, generating a force of similar magnitude but opposite direction. These two forces act in the same circumferential direction of the frame and are positioned opposite each other, thus forming a force couple balance system inside the frame. This effectively counteracts the torque and vibration generated when the pressing reaction force is transmitted through the frame. This active vibration damping method reduces the load deformation and vibration amplitude of the frame at its source, ensuring the verticality and concentricity of the main pressure mechanism during the pressing process, making it particularly suitable for scenarios with extremely high assembly precision requirements. Simultaneously, the dual-station layout combined with intermittent rotation enables parallel operations of pressing and inspection / unloading, improving production efficiency. Attached Figure Description

[0014] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0015] Figure 1 This is a schematic diagram of a dual-station shaft insertion machine according to the present invention; Figure 2This is a schematic diagram of the connection structure between the frame and the rotary drive assembly of this utility model; Figure 3 This is a schematic diagram of the connection structure between the workstation fixture and the cross slide table of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Frame; 2. Rotary drive assembly; 3. Workstation plate; 6. Pressing station; 7. Unloading and inspection station; 8. Main pressure mechanism; 9. Balancing and vibration damping mechanism; 10. Fixed bracket; 11. Vision positioning module; 12. Cross slide; 13. Workstation fixture; 1301. Base; 1302. Pneumatic finger; 1303. Elastic pad; 14. Pressure detection assembly. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0018] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a dual-station shaft insertion machine, including a frame 1, on which a PLC controller is mounted. A rotary drive assembly 2 is fixedly mounted on the frame 1, and the output end of the rotary drive assembly 2 is connected to a station disk 3. The rotary drive assembly 2 is used to drive the station disk 3 to perform intermittent indexing rotary motion. Two stations are evenly arranged along the circumferential direction on the station disk 3, including a pressing station 6 and a material unloading and inspection station 7. A main pressure mechanism 8 is fixedly mounted on the frame 1, located directly above the pressing station 6, and the output end of the main pressure mechanism 8 is vertically downward. A material unloading and inspection station 7 is also fixedly mounted on the frame 1. The balancing vibration damping mechanism 9 has the same structure and stroke as the main pressure mechanism 8. The workpiece passes through two stations in sequence. The PLC controller precisely controls the timing and motion parameters of the main pressure mechanism 8 and the balancing vibration damping mechanism 9 according to the preset program. At the pressing station 6, the main pressure mechanism 8 applies downward pressure to press the shaft into the workpiece. At the same time, the balancing vibration damping mechanism 9 moves upward synchronously under the command of the PLC controller. Its output upward force is intended to counteract the reaction force generated by the main pressure mechanism 8 when applying the pressing force, which is transmitted through the frame 1, thereby suppressing the overall vibration and deformation of the frame 1 and stabilizing the pressing process.

[0019] Both the main pressure mechanism 8 and the balancing vibration damping mechanism 9 are servo screw-slider mechanisms. Both are electrically connected to a PLC controller. The servo motor drives the screw to move the slider in a linear motion. The PLC controller uses the same control algorithm and closed-loop feedback (such as encoder feedback) to ensure that the downward movement of the slider in the main pressure mechanism 8 and the upward movement of the slider in the balancing vibration damping mechanism 9 are highly synchronized in terms of time, speed, acceleration, and displacement, thereby achieving dynamic force matching and cancellation.

[0020] The outer wall of the frame 1 is provided with a fixed bracket 10, and the top of the fixed bracket 10 is provided with a vision positioning module 11. The vision positioning module 11 is electrically connected to the PLC controller. The vision positioning module 11 includes an industrial camera and a ring light source. The industrial camera captures images of the workpiece, the PLC controller acquires the image data and calculates the position deviation. After the vision positioning module 11 identifies the position of the workpiece, the PLC controller drives the cross slide 12 to make fine adjustments in the XY direction so that the workpiece reaches the preset assembly position. This can realize the automatic identification and fine adjustment of the workpiece position, improve the pre-alignment accuracy, reduce manual intervention, and adapt to the needs of flexible production of multiple varieties and small batches.

[0021] The workstation tray 3 is provided with a plurality of cross slides 12 arranged in a ring and equidistantly. Workstation fixtures 13 are connected to the cross slides 12 via sliders. The workstation fixtures 13 include a base 1301 connected to the slider of the cross slides 12. At least one pair of pneumatic fingers 1302 are installed on the base 1301. The output end of the pneumatic fingers 1302 is connected to an elastic pad 1303. The pneumatic fingers 1302 are electrically connected to a PLC controller. Under the control of the PLC controller, the pneumatic fingers 1302 clamp the workpiece. The elastic pad 1303 provides cushioning and anti-slip. The workstation fixtures 13 achieve precise positioning and posture adjustment through the cross slides 12.

[0022] The cross slide 12 is a ball screw slide driven by a servo motor. The cross slide 12 is electrically connected to the PLC controller. The servo motor receives pulse signals from the PLC controller, drives the ball screw to rotate, and drives the slider to be precisely positioned along the guide rail, so as to realize the precise movement of the workpiece in the horizontal plane. It has high positioning accuracy, high rigidity and fast response characteristics, and is suitable for micron-level attitude adjustment requirements.

[0023] The main pressure mechanism 8 is equipped with a pressure detection component 14 at its pressure output end. The pressure detection component 14 is electrically connected to the PLC controller. The pressure detection component 14 includes a pressure sensing unit, a displacement sensing unit, a data acquisition unit, and an embedded processor. The pressure sensor and displacement sensor collect data in real time, and the embedded processor analyzes and judges the data. If the pressure-displacement curve is abnormal, an alarm or record is triggered to ensure that each workpiece is press-fitted. By collecting pressure and displacement data in real time during the press-fitting process through the pressure detection component 14, online monitoring of press-fitting quality and traceability of process parameters can be achieved, thereby improving product consistency.

[0024] Industrial robots or three-coordinate gantry robots are installed next to the fixed support 10 and the unloading and inspection station 7. The industrial robots or gantry robots complete the gripping, placement and transfer of workpieces according to the preset path, realize fully automatic loading and unloading, improve production cycle and automation level, reduce manual intervention, and ensure operation safety and consistency.

[0025] The rotary drive component 2 is a DD direct drive motor, which is electrically connected to the PLC controller. The DD motor directly drives the workstation disk 3, and the PLC controller controls the workstation disk 3 to perform intermittent indexing rotation at a preset angle (such as 90°), realizing fast and accurate switching between workstations. It has the advantages of fast response, accurate indexing, and no backlash, and is suitable for high-precision intermittent indexing motion, improving workstation switching efficiency and positioning repeatability.

[0026] During operation, the workpiece is first gripped by an industrial robot or gantry manipulator and placed in the station fixture 13. Then, the rotary drive assembly 2 drives the station disk 3 to rotate 90°, sending the workpiece directly below the vision positioning module 11. The vision positioning module 11 performs image acquisition and position recognition on the workpiece, and drives the cross slide 12 through the PLC controller to fine-tune the workpiece to achieve pre-alignment. After that, the station disk 3 rotates again, sending the workpiece to the pressing station 6. The main pressure mechanism 8 moves downward to press the shaft into the workpiece. At the same time, the balancing vibration damping mechanism 9 moves in the opposite direction to the main pressure mechanism 8 under the command of the PLC controller, generating a force opposite to the pressing reaction force, thereby counteracting the reaction force and vibration generated by the main pressure mechanism 8. Finally, the workpiece rotates to the unloading inspection station 7, where the pressure detection assembly 14 detects the pressing quality, and the unloading manipulator removes the workpiece.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A dual-station shaft insertion machine, characterized in that: Includes a frame (1), on which a rotary drive assembly (2) is fixedly installed. The output end of the rotary drive assembly (2) is connected to a workstation disk (3). The rotary drive assembly (2) is used to drive the workstation disk (3) to perform intermittent indexing rotary motion. Two workstations are evenly arranged along the circumference of the workstation plate (3). The two workstations include a pressing workstation (6) and a material unloading inspection workstation (7). A main pressure mechanism (8) located directly above the pressing workstation (6) is fixedly installed on the frame (1). The output end of the main pressure mechanism (8) is set vertically downward. A balance vibration damping mechanism (9) located directly above the material unloading inspection workstation (7) is also fixedly installed on the frame (1).

2. The dual-station shaft insertion machine according to claim 1, characterized in that: The main pressure mechanism (8) and the balance damping mechanism (9) are both servo screw and slider mechanisms, and the main pressure mechanism (8) and the balance damping mechanism (9) have the same structure and motion stroke.

3. The dual-station shaft insertion machine according to claim 1, characterized in that: The outer wall of the frame (1) is provided with a fixed bracket (10), and the top of the fixed bracket (10) is provided with a visual positioning module (11), which includes an industrial camera and a ring light source.

4. A dual-station shaft insertion machine according to claim 3, characterized in that: The workstation plate (3) is provided with a plurality of cross slides (12) arranged in a ring and equidistantly distributed, and the workstation fixture (13) is connected to the cross slides (12) via sliders. The workstation fixture (13) includes a base (1301) connected to the slider of the cross slide (12), and at least one pair of pneumatic fingers (1302) are mounted on the base (1301). The output end of the pneumatic fingers (1302) is connected to an elastic pad (1303).

5. A dual-station shaft insertion machine according to claim 4, characterized in that: The cross slide (12) is a ball screw slide driven by a servo motor.

6. A dual-station shaft insertion machine according to claim 1, characterized in that: The main pressure mechanism (8) is equipped with a pressure detection component (14) at its pressure output end. The pressure detection component (14) includes a pressure sensing unit, a displacement sensing unit, a data acquisition unit, and an embedded processor.

7. A dual-station shaft insertion machine according to claim 3, characterized in that: Industrial robots or three-coordinate gantry robots are installed next to the fixed bracket (10) and the unloading and inspection station (7).

8. A dual-station shaft insertion machine according to claim 1, characterized in that: The rotary drive assembly (2) is a DD direct drive motor.

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