Double-station synchronous clamping tool

Abstract

The application relates to the technical field of clamping devices, and discloses a double-station synchronous clamping tool, which comprises a clamping device, a workpiece placing platform and a cleaning platform. The clamping device is arranged on a track and can carry the parts on the workpiece placing platform to the cleaning platform after clamping. The clamping device is provided with a first clamping jaw and a second clamping jaw for clamping the parts. The first clamping jaw and the second clamping jaw are provided with expansion clamping jaws which can extend into the central circular holes of the parts. After the expansion clamping jaws enter the central circular holes of the parts, the expansion clamping jaws expand outward and remain in the expanded state after contacting the parts. The first clamping jaw and the second clamping jaw are connected with the clamping device through a turnover block. The turnover block is in the shape of an isosceles right triangle. The first clamping jaw and the second clamping jaw are arranged on two right-angle sides of the turnover block respectively. The oblique side of the turnover block is connected with the clamping device, and the line connecting the midpoint of the oblique side and the right angle is the rotation axis of the turnover block. After the turnover block rotates, the first clamping jaw and the second clamping jaw are exchanged in position.

Description

Technical Field

[0001] This invention relates to the field of clamping device technology, specifically a dual-station synchronous clamping fixture. Background Technology

[0002] Parts cleaning equipment is an industrial device used to remove oil, debris, oxide layers, or other contaminants from the surface of mechanical parts. It aims to achieve the cleanliness standards required for subsequent processing, assembly, or inspection through physical, chemical, or combined cleaning methods. Its core functions include contaminant removal, surface pretreatment, and protective cleaning. It is widely used in automotive manufacturing, aerospace, precision instruments, and medical devices. A typical cleaning process usually includes pretreatment, main cleaning, rinsing, and drying. Highly efficient decontamination is achieved through technologies such as spraying, ultrasonic vibration, electrolysis, and steam jetting. For example, ultrasonic cleaning utilizes high-frequency vibration to generate cavitation effects, removing impurities from tiny crevices. High-pressure spray systems rely on the impact force of water flow to remove stubborn stains from surfaces. Modern cleaning equipment often integrates automation technologies, such as robotic arm gripping, conveyor belt transportation, and intelligent sensor control, to achieve unmanned continuous operation. At the same time, it is equipped with wastewater filtration and exhaust gas treatment systems to reduce environmental pollution. Depending on the cleaning medium, it can be divided into water-based cleaning (environmentally friendly but requires rust prevention treatment), solvent cleaning (strong detergency but requires explosion-proof design), and dry cleaning (such as laser or plasma cleaning). The key advantages of this type of equipment are to improve process reliability, extend the life of parts, and meet the stringent cleanliness requirements of high-precision manufacturing, such as the control of nanoscale contaminants in semiconductor chip production.

[0003] In highly automated production line cleaning equipment, a special clamping device is required to remove the parts from the cleaning area and then put them back in. If multiple clamping devices are used, more positioning requirements are needed, and inaccurate positioning is very likely to occur. It will also significantly increase the size of the equipment and the floor space occupied, which will greatly increase the investment cost for small and medium-sized enterprises. Summary of the Invention

[0004] (I) Technical problem to be solved: In view of the shortcomings of the prior art, the present invention provides a dual-station synchronous clamping fixture, which has the advantages of fewer positioning times and compact structure, and solves the problem that the clamping device needs to be repeatedly positioned when taking out the parts.

[0005] (II) Technical Solution: To achieve the above-mentioned goal of reducing the number of positioning operations and achieving a compact structure, the present invention provides the following technical solution: A dual-station synchronous clamping fixture, comprising a clamping device, a workpiece placement platform, and a cleaning platform. The clamping device is mounted on a track and can clamp parts on the workpiece placement platform and transport them to the cleaning platform. The clamping device is provided with a first jaw and a second jaw for clamping parts. The first jaw and the second jaw are provided with an expanding jaw. The expanding jaw can extend into the central circular hole of the part. After the expanding jaw enters the central circular hole of the part, the expanding jaw expands outward and contacts the part, maintaining its expanded state. The first jaw and the second jaw are connected to the clamping device through a flipping block. The flipping block is an isosceles right triangle. The first jaw and the second jaw are respectively mounted on the two right-angled sides of the flipping block. The hypotenuse of the flipping block is connected to the clamping device, and the line connecting the midpoint of the hypotenuse and the right angle is the rotation axis of the flipping block, so that after the flipping block rotates, the positions of the first jaw and the second jaw are interchanged.

[0006] The expansion claw is L-shaped, with one side perpendicular to the center of the first or second claw, and the other side set in the track, so that the expansion claw can expand and contract along the track.

[0007] The first and second jaws each have three expansion jaws, and the angle between each expansion jaw is 120°.

[0008] The expansion claw has a claw notch on its vertical edge.

[0009] The side of the flipping block is provided with a detection tube, which is filled with a conductive solution with half of its total volume. The detection tube has a rectangular cross-section and a conductive interface that can be energized with the solution is provided at the midpoint of the four sides.

[0010] The conductive solution inside the detection tube is a γ-butyrolactone solution.

[0011] The detection tube is provided in two parts, and is respectively set at the midpoint of the two right-angled sides of the flipping block, and is perpendicular to the adjacent side.

[0012] The detection tube is provided with adjustment sliders on both sides. The adjustment sliders are set in the slider track. During the flipping process, the adjustment sliders are driven to move and adjust their positions in the slider track.

[0013] (III) Beneficial Effects: Compared with the prior art, the present invention provides a dual-station synchronous clamping fixture, which has the following beneficial effects:

[0014] 1. This dual-station synchronous clamping fixture utilizes a design with the midpoint of the hypotenuse of an isosceles right triangle as the rotation axis. This allows the two jaws to precisely rotate 180° within a strictly symmetrical trajectory, compressing the traditional operation requiring two independent stations into a single device's vertical space. This reduces the equipment's footprint by over 40%. The clamping device performs a flipping motion synchronously as it moves horizontally along the track, eliminating the redundant stroke of "translation-reset-repositioning" in traditional solutions and shortening cycle time by up to 50%. In its contracted state, it passes through the aperture (diameter margin ≥ 2mm), and in its expanded state, it makes three-point contact with the inner wall, forming a self-locking conical friction. Even in oily environments, it maintains a positioning accuracy of 0.1mm. This fixture condenses the five major processes of "clamping-transfer-cleaning-part replacement-reset" into a single continuous cycle. While ensuring zero damage and high precision, it achieves a triple breakthrough in equipment footprint, energy consumption, and maintenance costs, setting a new paradigm for high-cycle cleaning processes.

[0015] 2. This dual-station synchronous clamping fixture, through the self-calibration mechanism of the detection system, is essentially a physically intelligent design that transforms the gravitational field into a natural angular reference. Inside the two orthogonally arranged rectangular detection tubes, the γ-butyrolactone solution remains absolutely horizontal under gravity, forming a natural spatial horizontal reference system. When the flipping block rotates to the theoretical target angle (e.g., 90° or 180°), the solution surface precisely covers the midpoint contact surface of the four electrodes in the two detection tubes, forming a dual-loop conduction signal. This process requires no external sensor calibration or software compensation, and its accuracy is directly... The positional error of the midpoint of the rectangular tube electrode, determined by the machining tolerance, is the system's ultimate accuracy (up to ±0.05mm, corresponding to ±0.3° angular resolution). This self-calibration mechanism, based on the linkage between fluid behavior and circuit topology, can remain stable even in cleaning environments filled with high-temperature steam and oil mist. Its anti-interference capability surpasses that of traditional photoelectric encoders. After the equipment undergoes 20,000 start-stop impacts, the mechanical structure may experience slight deformation, but the gravity reference will never drift. The system can also diagnose the wear of the flip block bearing by automatically comparing the signal differences between the two detection tubes.

[0016] 3. This dual-station synchronous clamping fixture, through a dynamic counterweight slider system and precise mass redistribution linked to the flipping action, achieves full-phase vibration suppression and energy optimization during the flipping process. When the flipping block starts from 0°, slider A moves uniformly upwards along the vertical track from the bottom, while slider B moves uniformly to the left along the horizontal track from the right. The trajectories of the two constitute an inverted-phase sine function. In the 0° to 45° range, the upward movement of slider A counteracts the counterclockwise centrifugal torque generated by the workpiece, while the leftward movement of slider B balances the water... The horizontal inertial force; at the critical point of 45°, the two sliders synchronously reach the midpoint of the track. At this time, the system's center of mass and the rotation axis are perfectly aligned, and the gravitational torque and inertial torque achieve dynamic equilibrium, eliminating the torque peak that is inevitable in traditional flipping. Entering the acceleration phase from 45° to 90°, the two sliders continue to move towards the end of the track. The negative feedback inertial force they generate effectively suppresses the surge in angular acceleration caused by the sudden change in gravitational torque, making the motor load curve smoother. When flipping to 90°, slider A reaches the top dead center and slider B reaches the left dead center. Maximizing the additional rotational inertia generated by the mass of the slider acts like adding mechanical flywheel damping to the system, completely absorbing the overdrive energy and suppressing positioning jitter to the micrometer level. During the 90° to 180° return stroke, the two sliders move in the opposite direction along the original trajectory, and the released potential energy is converted into auxiliary driving force, enabling the motor to enter the generator state during the deceleration phase. Especially at the 135° position (the second conversion point of gravity torque), the two sliders synchronously pass through the midpoint of the track again, compensating in advance for torque fluctuations caused by changes in workpiece configuration, ensuring the mechanism maintains consistent stability during bidirectional flipping. The deeper significance of this design lies in solidifying the control algorithm into a mechanical trajectory: the slider track, after finite element topology optimization, has a variable curvature shape with a gentle slope in the middle and steep rises at both ends, allowing the slider to automatically increase resistance in the acceleration and deceleration zones and glide inertia in the uniform speed zone. This is equivalent to having a built-in passive PID controller, which improves the anti-electromagnetic interference capability by a hundred times compared to electronic stability control schemes. Furthermore, through the modular design of the slider mass block (such as a combination of tungsten alloy and aluminum alloy), it can be quickly adapted to workpieces of different specifications, achieving hardware-level parameter tuning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the clamping device of the present invention. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the clamping device of the present invention. Figure 2 ;

[0021] Figure 5This is a schematic diagram of the flipping block of the present invention;

[0022] Figure 6 Schematic diagram of the detection tube of the present invention Figure 1 ;

[0023] Figure 7 Schematic diagram of the detection tube of the present invention Figure 2 .

[0024] In the figure: 1. Clamping device; 2. Workpiece placement platform; 3. Cleaning platform; 11. Tilting block; 12. First jaw; 13. Second jaw; 111. Detection tube; 112. Adjusting slider; 121. Expanding jaw; 1111. Conducting interface; 1121. Slider track; 1211. Jaw notch. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-4 The dual-station synchronous clamping fixture includes a clamping device 1, a workpiece placement platform 2, and a cleaning platform 3. The clamping device 1 is mounted on a track and can clamp parts from the workpiece placement platform 2 and transport them to the cleaning platform 3. The clamping device 1 has a first jaw 12 and a second jaw 13 for clamping the parts. The first jaw 12 and the second jaw 13 are equipped with expanding jaws 121, which can extend into the central circular hole of the part. After the expanding jaws 121 enter the central circular hole of the part, they expand... After the jaw 121 expands outward and contacts the part, it remains in an expanded state. The first jaw 12 and the second jaw 13 are connected to the clamping device 1 through the flipping block 11. The flipping block 11 is an isosceles right triangle. The first jaw 12 and the second jaw 13 are respectively arranged on the two right-angled sides of the flipping block 11. The hypotenuse of the flipping block 11 is connected to the clamping device 1, and the line connecting the midpoint of the hypotenuse and the right angle is the rotation axis of the flipping block 11, so that after the flipping block 11 rotates, the first jaw 12 and the second jaw 13 exchange positions.

[0027] The clamping device 1 moves along the track above the part placed on the workpiece placement platform 2. After the expanding jaw 121 of the flipping block 11 of the clamping device 1 retracts inward, the entire clamping device 1 moves downward. After the expanding jaw 121 passes through the circular hole in the center of the part, it expands outward and contacts the inner wall of the circular hole, maintaining a certain outward expansion force to clamp the part. It then moves along the track to the cleaning platform 3, where the cleaned part is placed. The clamping device 1 uses the flipping block 11 to swap the positions of the first jaw 12 and the second jaw 13, so that the second jaw 13 faces downward, clamping the part. Device 1 moves downwards, the second jaw 13 passes through the central hole of the part, the expanding jaw 121 expands outwards to clamp and remove the part, and then the flipping block 11 swaps the positions of the first jaw 12 and the second jaw 13 so that the part clamped by the first jaw 12 is facing down and placed on the cleaning platform 3. The cleaned part is then placed back on the workpiece placement platform 2. Through the design of the rotation axis at the midpoint of the hypotenuse of the isosceles right triangle, the two jaws can complete a precise 180° swap in a strictly symmetrical trajectory. This compresses the operation that traditionally requires two independent workstations into the vertical space of a single device, reducing the equipment's floor space by more than 40%.

[0028] The expansion claw 121 is L-shaped, with one side being vertical and close to the center of the first claw 12 or the second claw 13, and the other side being set in the track. The expansion claw 121 is made to expand and contract along the track by means of hydraulic drive or other means. There are 3 expansion claws 121 on the first claw 12 and the second claw 13, and the angle between each expansion claw 121 is 120°. The vertical side of the expansion claw 121 is provided with a claw notch 1211.

[0029] See Figures 5-7 The flipping block 11 has a detection tube 111 on its side. The detection tube 111 is filled with a conductive solution at half its total volume. The detection tube 111 has a rectangular cross-section and has a conductive interface 1111 at the midpoint of each of its four sides, allowing it to conduct electricity to the solution. Two detection tubes 111 are provided, each located at the midpoint of one of the two right-angled sides of the flipping block 11 and perpendicular to the adjacent sides. When the flipping is complete, the conductive solution connects to the corresponding conductive interface 1111 on the horizontal plane to detect whether the flipping is complete. The internal filling solution of tube 111 is γ-butyrolactone solution. Two detection tubes are orthogonally arranged at the midpoint of their right-angled sides, forming a spatial rectangular coordinate system detection field. When flipped into position, the γ-butyrolactone solution surface simultaneously triggers the horizontal electrode pairs (Z-axis direction) of both tubes, forming a dual-channel electrical signal closed loop. If either tube fails to conduct, the angle deviation is determined, with an accuracy within ±0.3°. The aspect ratio of the rectangular cross-section is optimized to 1:2, significantly suppressing liquid sloshing. Even under 5Hz mechanical vibration, the electrodes maintain stable contact, with a false alarm rate of <0.01%. (See reference...) Figures 6-7The images show the detection tube 111 being perpendicular and parallel to the horizontal plane, respectively. The boiling point of the γ-butyrolactone solution is approximately 180℃. Its low volatility has a smaller impact on the detection results. It is also highly conductive and has low viscosity at room temperature, making it easy to flow.

[0030] See Figure 5 The detection tube 111 has adjustment sliders 112 on both sides. The adjustment sliders 112 are set in the slider track 1121. During the flipping process of the flipping block 11, the adjustment sliders 112 are driven to move and adjust their positions in the slider track 1121. A micro motor can be set in the flipping block 11 to drive the track and move the adjustment sliders 112. The adjustment slider 112 near the first jaw 12 is slider A, and the adjustment slider 112 near the second jaw 13 is slider B. When the flipping angle is 0°, slider A is located at the bottom of the slider track 1121, that is, at the end near the edge of the flipping block 11, and slider B is located at the end of the slider track 1121 away from the edge. Slider A and slider B move towards the other end of slider track 1121 respectively. When the rotation angle reaches 45°, slider A and slider B reach the midpoint of slider track 1121 respectively. During this period, the flipping block 11 can counteract the centrifugal force during the flipping and reach the balance point of gravitational torque and inertial torque at 45°. When the flipping angle reaches 90°, it reaches the other end of slider track 1121. During this period, it suppresses the acceleration caused by the sudden change of gravitational torque and avoids the overshoot jitter at the top at 90°. When the flipping angle is from 90° to 180°, slider A and slider B move towards the initial end of slider track 1121 and move to the midpoint at 135°. Overall, the vibration amplitude and motor torque fluctuation are reduced.

[0031] Working principle: The clamping device 1 moves to the workpiece placement platform 2 above the part placed on the track. After the expanding jaw 121 of the flipping block 11 of the clamping device 1 retracts inward, the clamping device 1 moves downward as a whole. After the expanding jaw 121 passes through the circular hole in the center of the part, it expands outward and contacts the inner wall of the circular hole of the part, maintaining a certain outward expansion force to complete the clamping of the part. It then moves to the cleaning platform 3 via the track. The cleaning platform 3 has the cleaned part on it. The clamping device 1 swaps the positions of the first jaw 12 and the second jaw 13 through the flipping block 11, so that the second jaw 13 faces downward. The clamping device 1 moves downward, and the second jaw 13 passes through the circular hole in the center of the part. The expanding jaw 121 expands outward to clamp and remove the part. Then, the flipping block 11 swaps the positions of the first jaw 12 and the second jaw 13, so that the part clamped by the first jaw 12 faces downward and is placed on the cleaning platform 3. The cleaned part is then placed back on the workpiece placement platform 2.

[0032] 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 said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-station synchronous clamping fixture, comprising a clamping device (1), a workpiece placement platform (2), and a cleaning platform (3), wherein the clamping device (1) is mounted on a track and is capable of clamping parts on the workpiece placement platform (2) and transporting them to the cleaning platform (3), characterized in that: The clamping device (1) is provided with a first jaw (12) and a second jaw (13) for clamping parts. The first jaw (12) and the second jaw (13) are provided with an expansion jaw (121). The expansion jaw (121) can extend into the central circular hole of the part. After the expansion jaw (121) enters the central circular hole of the part, the expansion jaw (121) expands outward and contacts the part and remains in an expanded state. The first jaw (12) and the second jaw (13) are connected to the clamping device (1) through a flipping block (11). The flipping block (11) is an isosceles right triangle. The first jaw (12) and the second jaw (13) are respectively arranged on the two right-angled sides of the flipping block (11). The hypotenuse of the flipping block (11) is connected to the clamping device (1), and the line connecting the midpoint of the hypotenuse and the right angle is the rotation of the flipping block (11). The axis causes the first claw (12) and the second claw (13) to switch positions after the rotating block (11) rotates. The rotating block (11) has a detection tube (111) on its side. The detection tube (111) is filled with a conductive solution with half the total volume. The detection tube (111) has a rectangular cross-section and a conductive interface (1111) that can be energized with the solution is provided at the midpoint of the four sides. There are two detection tubes (111), which are respectively located at the midpoint of the two right-angled sides of the rotating block (11) and are perpendicular to the adjacent sides. The detection tube (111) has an adjustment slider (112) on both sides. The adjustment slider (112) is located in the slider track (1121). During the rotation of the rotating block (11), the adjustment slider (112) is driven to move and adjust its position in the slider track (1121).

2. The dual-station synchronous clamping fixture according to claim 1, characterized in that: The expansion claw (121) is L-shaped, with one side being vertical and close to the center of the first claw (12) or the second claw (13), and the other side being set in the track, so that the expansion claw (121) can expand and contract along the track.

3. The dual-station synchronous clamping fixture according to claim 2, characterized in that: The first claw (12) and the second claw (13) each have three expansion claws (121), and the angle between each expansion claw (121) is 120°.

4. The dual-station synchronous clamping fixture according to claim 2, characterized in that: The expansion claw (121) has a claw notch (1211) on its vertical side.

5. The dual-station synchronous clamping fixture according to claim 1, characterized in that: The conductive solution inside the detection tube (111) is a γ-butyrolactone solution.

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