Bidirectional clamping and fixing device for linear cutting
By using a four-bar linkage mechanism and a bidirectional drive cylinder for synchronous clamping, combined with motor drive and clamping cylinder for auxiliary clamping, the problem of uneven clamping and response delay in traditional wire EDM fixtures is solved, achieving efficient and stable workpiece positioning and protective clamping, which is suitable for precision machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional wire EDM fixtures suffer from uneven unidirectional clamping force and insufficient structural rigidity, leading to workpiece displacement. In particular, irregularly shaped workpieces are prone to clamping dead angles and vibration displacement. Existing bidirectional clamping devices suffer from response delay and asynchronous clamping force, and the lack of a fine-tuning module results in time-consuming secondary positioning.
It adopts a four-bar linkage mechanism and a bidirectional drive cylinder for synchronous clamping, combined with a motor-driven dynamic fine-tuning module and a clamping cylinder for auxiliary clamping. The four-bar mechanism achieves bidirectional symmetrical clamping, ensuring uniform distribution of clamping force. The rubber layer and anti-slip texture enhance friction, adapting to different workpiece surface shapes and materials.
It achieves efficient and stable bidirectional clamping, improves clamping efficiency and structural rigidity, adapts to the precise positioning and protective clamping of complex workpieces, avoids workpiece slippage or scratches, and is suitable for precision machining and fragile materials.
Smart Images
Figure CN224088144U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wire cutting technical field especially a two -way clamping fixing device for wire cutting. BACKGROUND
[0002] In the field of wire cutting processing, the traditional fixture often causes workpiece deviation due to uneven one-way clamping force and insufficient structural rigidity, especially the special-shaped workpiece is prone to clamping dead angle and vibration displacement, the existing two-way clamping device adopts independent driving unit, there are response delay and clamping force out of sync problems, and lack of fine adjustment module leads to secondary positioning time consumption.
[0003] In view of the above defects, the designer actively researches and innovates to create a two-way clamping fixing device for wire cutting, which has more industrial utilization value. INVENTION CONTENTS
[0004] To solve the above technical problems, the utility model aims at providing a two-way clamping fixing device for wire cutting.
[0005] The utility model discloses a two-way clamping fixing device for wire cutting, which comprises a mounting plate fixed on the top of a rack, and the two sides of the mounting plate are mirror image arranged clamping parts, each clamping part comprises an upper support rod, a middle support rod and a lower support rod, the two ends of the upper support rod, the middle support rod and the lower support rod are movably installed through shafts and corner-shaped support arms, the upper end of the support arm is movably installed with the upper support rod, the corner point of the support arm is movably installed with the middle support rod, the lower end of the support arm is movably installed with the lower support rod, and the inner side of the lower support rod is provided with a pressing plate for clamping.
[0006] The two-way clamping fixing device for wire cutting adopts the mounting plate as the base body, the top of which is fixed on the rack, and the clamping parts are symmetrically arranged on both sides of the middle axis at the bottom, each clamping part is composed of an upper support rod, a middle support rod and a lower support rod, the two ends of the three are movably connected with the corner-shaped support arm through the shafts, forming a four-bar linkage mechanism: the upper end of the support arm is hinged with the upper support rod, the corner point is hinged with the middle support rod, and the lower end is hinged with the lower support rod. The inner side of the lower support rod is provided with a pressing plate, which is driven to translate along the workpiece clamping direction through the synchronous motion of the four-bar mechanism, realizing two-way symmetric clamping.
[0007] Further, the inner side of the middle support rod is symmetrically fixed with a fixed plate, a two-way driving cylinder is arranged between the two fixed plates, and the two end piston rods of the two-way driving cylinder are respectively in transmission connection with the upper support rod of the corresponding side, for driving the two clamping parts to open and close synchronously.
[0008] The two fixed plates are horizontally arranged between the two fixed plates. The piston rods at the two ends of the double-direction driving cylinder are respectively rigidly connected with the upper supporting rods of the two clamping parts. Through the synchronous extension and contraction movement of the piston rods of the double-direction driving cylinder, the upper supporting rods of the two clamping parts are directly driven to move along the axial linkage, so that the supporting arm and the pressing plate of the lower supporting rod are realized to be opened and closed in the double-direction and symmetrically. The design takes the double-direction driving cylinder as the power core, and through the positioning and supporting of the fixed plate, the movement trajectories of the two clamping parts are strictly synchronized, the imbalance problem of the clamping force caused by the independent driving of the traditional clamp is solved, and the clamping efficiency and the structural rigidity are significantly improved.
[0009] Further, the connecting plate is fixed on the supporting arm between the middle supporting rod and the lower supporting rod, the motor is arranged on the connecting plate through the support, the output shaft of the motor is provided with the swing arm, the swing arm is movably arranged with the connecting rod at the end thereof through the shaft, the end of the connecting rod is movably arranged with the mounting block through the shaft, and the mounting block is fixed on the outer side of the pressing plate.
[0010] The connecting plate is fixed on the supporting arm between the middle supporting rod and the lower supporting rod, the motor is arranged on the connecting plate through the support, the output shaft of the motor drives the swing arm to rotate, the end of the swing arm is hinged with the connecting rod through the shaft, and the other end of the connecting rod is movably connected with the mounting block fixed on the outer side of the pressing plate. When the motor operates, the circular motion of the swing arm is converted into the linear displacement of the pressing plate through the connecting rod, a dynamic fine adjustment module of the clamping force is formed, the accurate control of the opening and closing stroke of the pressing plate is realized, and the clamping stability is improved through the mechanical force enhancement structure.
[0011] Further, the outer side of the pressing plate is further fixed with the pressing cylinder, and the telescopic rod of the pressing cylinder penetrates through the through hole on the pressing plate.
[0012] The outer side of the pressing plate is fixed with the pressing cylinder, and the telescopic rod of the pressing cylinder penetrates through the through hole on the pressing plate, thereby forming an auxiliary clamping unit independent of the driving of the clamping part. After the basic positioning of the pressing plate is completed in the double-direction clamping, the telescopic rod of the pressing cylinder can move axially along the through hole, thereby directly applying additional pressing force to the workpiece, enhancing the local clamping rigidity and contact stability, and simultaneously adapting to the workpiece requirements of different thicknesses or materials through the adjustable characteristics of the cylinder pressure, thereby realizing the composite control of multi-stage clamping force.
[0013] Further, the end of the telescopic rod of the pressing cylinder is fixed with the pressing block.
[0014] The end of the telescopic rod of the pressing cylinder is rigidly connected with the pressing block, the pressing block is made of wear-resistant material or elastic body, and the contact surface thereof directly acts on the workpiece. When the telescopic rod of the pressing cylinder is driven to extend, the pressing block uniformly disperses the clamping pressure through the surface contact, adapts to the shape difference of the workpiece surface, avoids local stress concentration or damage to the workpiece surface, simultaneously improves the clamping inclusiveness through the deformation compensation of the pressing block, realizes the collaborative control of flexible clamping and rigid locking, and meets the high-precision clamping requirements.
[0015] Furthermore, the inner end of the pressure block has a rubber layer, and the surface of the rubber layer is provided with anti-slip texture.
[0016] The inner end of the block is integrated with a highly elastic rubber layer. The surface of the rubber layer is molded with anti-slip texture. This structure compensates for the slight unevenness of the workpiece surface through the elastic deformation capability of the rubber layer. At the same time, the anti-slip texture significantly increases the dynamic friction coefficient of the contact interface, suppressing the relative slippage between the workpiece and the pressure block during clamping. The rubber layer also has a buffer protection function, avoiding surface indentations or scratches caused by direct contact between the metal pressure block and the workpiece. It is suitable for flexible clamping scenarios of precision workpieces or fragile materials.
[0017] By means of the above-described solution, the present invention has at least the following advantages:
[0018] This structure achieves efficient and safe clamping control through multi-component collaborative design. First, the clamping cylinder is driven independently of the pressure plate, allowing for precise adjustment of the extension stroke and pressure to adapt to the clamping needs of workpieces of different thicknesses or rigidities. Second, the rubber layer at the end of the clamping block compensates for workpiece surface unevenness through elastic deformation, and combined with anti-slip textures, significantly improves frictional resistance, effectively preventing workpiece slippage or displacement during clamping. In addition, the flexible contact of the rubber layer avoids workpiece surface indentations or scratches caused by hard metal contact, making it particularly suitable for protective clamping of precision-machined or fragile materials. The rigid linkage between the clamping block and the clamping cylinder further ensures clamping stability, forming a composite clamping system of "rigid locking as the main method and flexible adaptation as the auxiliary method," which balances high-precision positioning and workpiece safety, expanding the applicable scenarios and process compatibility of the equipment.
[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is the front view of this utility model;
[0023] In the diagram: 1. Mounting plate, 2. Upper support rod, 3. Middle support rod, 4. Lower support rod, 5. Support arm, 6. Pressure plate, 7. Fixing plate, 8. Two-way cylinder, 9. Connecting plate, 10. Motor, 11. Swing arm, 12. Connecting rod, 13. Mounting block, 14. Clamping cylinder, 15. Pressure block. Detailed Implementation
[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0025] See Figure 1 and Figure 2 This bidirectional clamping and fixing device for wire EDM is fixed to the frame via mounting plate 1. The clamping parts, which are mirror-distributed on both sides, are linked and controlled based on the parallelogram deformation principle. When an external drive is applied to the support rod, the support arm 5, the upper support rod 2, the middle support rod 3, and the lower support rod 4 form a rigid hinge mechanism, which drives the pressure plate 6 to move synchronously in the vertical direction, achieving bidirectional symmetrical clamping. The mirror symmetrical structure ensures that the clamping force is evenly distributed, eliminating workpiece deflection caused by unilateral pressure. The parallelogram mechanism ensures that the pressure plate 6 is always perpendicular to the workpiece surface, avoiding processing errors caused by clamping tilt during wire EDM. The three-support rod linkage design enhances structural rigidity and can withstand high-frequency cutting vibrations. The bidirectional synchronous clamping is suitable for irregular or thin-walled workpieces, and by adaptively adjusting the clamping stroke, it is compatible with a wide range of workpiece sizes, significantly improving clamping efficiency and processing stability.
[0026] A bidirectional drive cylinder 8 is mounted on a fixed plate 7 symmetrically fixed inside the middle support rod 3. The piston rods at both ends of the cylinder 8 are rigidly connected to the upper support rods 2 on both sides. During operation, the bidirectional drive cylinder 8 synchronously pulls the upper support rods 2 of the clamping parts on both sides through the extension and retraction of the piston rods. This, along with the linkage support arm 5, the middle support rod 3, and the lower support rod 4, forms a parallelogram mechanism that drives the pressure plate 6 to open and close symmetrically in both directions along the vertical direction.
[0027] The motor 10 is fixed by the connecting plate 9 between the middle support rod 3 and the lower support rod 4. The motor 10 drives the swing arm 11 to rotate, which drives the connecting rod 12 and the mounting block 13 to form a crank-slider mechanism. When the motor 10 starts, the circular motion of the swing arm 11 is converted into the vertical reciprocating motion of the pressure plate 6 through the connecting rod 12. The clamping stroke and pressure of the pressure plate 6 can be precisely controlled by adjusting the motor speed or direction. In conjunction with the bidirectional drive cylinder 8, multi-stage force application can be achieved. It is suitable for dynamic fine adjustment of the workpiece clamping force in high-precision wire cutting to ensure uniform pressing of complex curved surfaces or easily deformable workpieces.
[0028] The clamping cylinder 14 added to the outside of the pressure plate 6 passes through the through hole of the pressure plate 6 via a telescopic rod, which can provide auxiliary pressure during the clamping process. When the pressure plate 6 initially adheres to the surface of the workpiece through the drive mechanism, the clamping cylinder 14 is activated, the telescopic rod extends and acts directly on the workpiece to achieve local pressure compensation or secondary locking.
[0029] The pressure block 15 fixed at the end of the telescopic rod of the clamping cylinder 14 is made of a highly elastic and wear-resistant material. It directly contacts the workpiece surface during the pressure application process. When the clamping cylinder 14 is activated, the pressure block 15 extends with the telescopic rod and flexibly fits the workpiece through its arc or flat structure, dispersing local pressure and compensating for slight unevenness on the workpiece surface, thus avoiding stress concentration that could cause scratches or deformation of the workpiece.
[0030] The rubber layer and its surface anti-slip texture design on the inner end of the pressure block 15 adapt to the workpiece surface contour through elastic deformation during the clamping process. The anti-slip texture can enhance the friction of the contact surface and prevent the workpiece from sliding in the cutting vibration or oily environment. When the clamping cylinder 14 drives the pressure block 15 to abut against the workpiece, the rubber layer absorbs high-frequency vibration energy through local compression deformation. At the same time, the anti-slip texture forms a micro-interlock with the workpiece surface to ensure clamping stability.
[0031] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0032] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0033] Finally: The above are only preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A bidirectional clamping and fixing device for wire cutting, comprising a mounting plate (1) fixed at the top to a frame, characterized in that: With the central axis of the mounting plate as a reference, there are clamping parts set in mirror on both sides. Each clamping part includes an upper support rod (2), a middle support rod (3) and a lower support rod (4). The two ends of the upper support rod (2), the middle support rod (3) and the lower support rod (4) are movably installed with the corner support arm (5) through the shaft. The upper end of the support arm (5) is movably installed with the upper support rod (2), the corner point of the support arm (5) is movably installed with the middle support rod (3), and the lower end of the support arm (5) is movably installed with the lower support rod (4). There is a pressure plate (6) for clamping on the inner side of the lower support rod (4).
2. The bidirectional clamping and fixing device for wire cutting according to claim 1, characterized in that: A fixing plate (7) is symmetrically fixed on the inner side of the middle support rod (3). A bidirectional drive cylinder (8) is provided between the two fixing plates (7). The piston rods at both ends of the bidirectional drive cylinder (8) are respectively connected to the upper support rod (2) on the corresponding side to drive the clamping parts on both sides to open and close synchronously.
3. The bidirectional clamping and fixing device for wire cutting according to claim 2, characterized in that: Between the middle support rod (3) and the lower support rod (4), there is a connecting plate (9) fixed on the support arm (5). A motor (10) is mounted on the connecting plate (9) via a bracket. A swing arm (11) is mounted on the output shaft of the motor (10). A connecting rod (12) is movably mounted at the end of the swing arm (11) via a shaft. The end of the connecting rod (12) is movably mounted to the mounting block (13) via a shaft. The mounting block (13) is fixed on the outside of the pressure plate (6).
4. The bidirectional clamping and fixing device for wire cutting according to claim 3, characterized in that: A clamping cylinder (14) is also fixed on the outside of the pressure plate (6), and the telescopic rod of the clamping cylinder (14) passes through the through hole on the pressure plate (6).
5. The bidirectional clamping and fixing device for wire cutting according to claim 4, characterized in that: A pressure block (15) is fixed to the end of the telescopic rod of the clamping cylinder (14).
6. The bidirectional clamping and fixing device for wire cutting according to claim 5, characterized in that: The inner end of the pressure block (15) has a rubber layer, and the surface of the rubber layer is provided with anti-slip texture.