Vibration-damping fixture for bolt thread machining

Abstract

This utility model relates to the field of mechanical manufacturing technology, and in particular to a vibration-damping fixture for bolt thread processing. It includes a base, a controller, dampers, shock-absorbing springs, a support block, a turntable, and a motor. The controller is mounted on the front right side of the base. Two dampers are mounted on the upper middle side of the base, and a V-shaped support block connects the telescopic ends of the two dampers. Shock-absorbing springs connect both dampers and the support block. A turntable is rotatably connected to the upper left side of the base, and a motor is fixedly mounted on the upper left side of the base, with the motor's output shaft connected to the turntable's shaft. This utility model, by setting a V-shaped support block with shock-absorbing springs and dampers, provides elastic support to the middle of the bolt, effectively improving the overall rigidity of the workpiece, suppressing bending deformation and high-frequency chatter caused by cutting forces, and ensuring the surface finish and thread profile accuracy of the thread.

Description

Technical Field

[0001] This utility model relates to a vibration-damping fixing fixture for bolt thread processing, belonging to the field of mechanical manufacturing technology. Background Technology

[0002] In the field of mechanical manufacturing, bolt thread processing is a common process, widely used in industries such as automobiles, aerospace, and power fittings. The processing accuracy of the external thread directly affects the connection strength and assembly reliability. In actual production, bolt threads are mostly formed by cutting processes such as turning and thread rolling, requiring the workpiece to maintain high stability during processing.

[0003] Currently, common bolt clamping methods mostly use three-jaw chucks or simple vises for fixing. Although such clamps can achieve basic positioning, for slender rod-shaped bolts, their rigidity is poor, and they are prone to bending deformation and high-frequency chatter under cutting force, affecting the surface quality of the threads. Secondly, traditional clamps only clamp the end of the workpiece at one or two points, lacking effective support for the middle area, and cannot suppress dynamic vibration during the processing.

[0004] Therefore, it is necessary to design a vibration-damping fixing fixture for bolt thread machining. Summary of the Invention

[0005] In order to overcome the shortcomings of existing thread processing fixtures which generally lack vibration resistance, this utility model provides a vibration-proof fixing fixture for bolt thread processing.

[0006] The technical implementation scheme of this utility model is as follows: a vibration-damping fixing fixture for bolt thread processing includes a base, a controller, a damper, a shock-absorbing spring, a support block, a turntable, a motor, a clamping block, a first adjusting screw, and a knob. The controller is installed on the front right side of the base, and two dampers are installed on the upper side of the middle of the base. A V-shaped support block is connected between the telescopic ends of the upper parts of the two dampers. A shock-absorbing spring is connected between each of the two dampers and the support block. A turntable is rotatably connected to the upper left side of the base, and a motor is fixedly installed on the upper left side of the base. The output shaft of the motor is connected to the rotating shaft of the turntable, and a groove is opened on the right side of the turntable. Two clamping blocks are arranged symmetrically on the right side of the turntable. The two clamping blocks are also V-shaped, and the upper clamping block is slidably connected inside the groove, while the lower clamping block is fixedly connected to the turntable. A first adjusting screw is rotatably connected inside the groove and threadedly connected to the adjacent clamping block. A knob is fixedly connected to the top of the first adjusting screw.

[0007] As a further improvement of this utility model, it also includes a guide frame, a push plate, an electric push rod, a connecting block, a second adjusting screw, and a clamping wheel. The guide frame is fixedly connected to the upper right side of the base. The push plate is horizontally slidably installed inside the guide frame. A groove is also opened on the left side of the push plate. The electric push rod is fixedly installed on the right side of the guide frame. The telescopic end of the electric push rod is connected to the push plate. The connecting block is slidably connected up and down inside the groove on the push plate. The second adjusting screw is also rotatably connected inside the groove on the push plate. A knob is also fixedly connected to the top of the second adjusting screw. The second adjusting screw is threadedly connected to the connecting block. A clamping wheel is rotatably connected to the left side of the connecting block. A clamping block is also fixedly connected to the lower left side of the push plate. The clamping block is horizontally aligned with the clamping block fixed on the turntable.

[0008] As a further improvement of this utility model, it also includes elastic pads, and elastic pads are provided on the clamping surfaces of the clamping blocks.

[0009] As a further improvement of this utility model, it also includes foot pads, with multiple foot pads provided on the lower part of the base.

[0010] As a further improvement of this utility model, in the initial state, the vertical height of the support block is higher than the vertical height of the two clamping blocks fixed on the push plate and the turntable.

[0011] As a further improvement of this utility model, the clamping wheel is made of nylon.

[0012] Compared with existing technologies, the present invention has the following advantages: The present invention has a reasonable and ingenious structure. By setting a V-shaped support block with shock-absorbing spring and damper, it provides elastic support for the middle of the bolt, effectively improving the overall rigidity of the workpiece, suppressing bending deformation and high-frequency chatter caused by cutting force, and ensuring the surface finish and tooth profile accuracy of the thread.

[0013] This utility model adopts a clamping method with a central elastic support and downward pressing at both ends to form a stable three-point positioning structure. The workpiece is always supported by the support block, avoiding a cantilever state and significantly improving the clamping rigidity and stability of slender bolts. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the shock-absorbing spring, support block, and turntable components of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the first adjusting screw, knob, and elastic pad of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the guide frame, push plate, and electric push rod of this utility model.

[0018] The attached figures are labeled as follows: 1. Base; 2. Controller; 3. Damper; 4. Shock absorber spring; 5. Support block; 6. Turntable; 7. Motor; 8. Clamping block; 9. First adjusting screw; 10. Knob; 11. Elastic pad; 12. Guide frame; 13. Push plate; 14. Electric push rod; 15. Connecting block; 16. Second adjusting screw; 17. Pressure wheel; 18. Foot pad. Detailed Implementation

[0019] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely 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 should fall within the protection scope of the present invention.

[0021] like Figure 1-4 As shown, this utility model discloses a vibration-damping fixing fixture for bolt thread processing, comprising a base 1, a controller 2, dampers 3, shock-absorbing springs 4, a support block 5, a turntable 6, a motor 7, a clamping block 8, a first adjusting screw 9, and a knob 10. The controller 2 is mounted on the front right side of the base 1. Two dampers 3 are mounted on the upper middle side of the base 1. A V-shaped support block 5 is connected between the telescopic ends of the two dampers 3. Shock-absorbing springs 4 are connected between each damper 3 and the support block 5. A turntable 6 is rotatably connected to the upper left side of the base 1. A motor 7 is bolted to the upper left side of the base 1. The output shaft of the motor 7 is connected to the rotating shaft of the turntable 6. A groove is provided on the right side of the turntable 6. Two clamping blocks 8 are arranged symmetrically on the right side of the turntable 6. Both clamping blocks 8 are V-shaped. The upper clamping block 8 is slidably connected inside the groove, and the lower clamping block 8 is fixed to the turntable 6. A first adjusting screw 9 is rotatably connected inside the groove. The first adjusting screw 9 is threadedly connected to the adjacent clamping block 8. A knob 10 is fixedly connected to the top of the first adjusting screw 9. The controller 2 is a mature product in the prior art, such as a PLC controller, industrial computer, or embedded motion controller.

[0022] like Figure 1 , Figure 2 and Figure 4As shown, it also includes a guide frame 12, a push plate 13, an electric push rod 14, a connecting block 15, a second adjusting screw 16, and a pressure wheel 17. The guide frame 12 is fixedly connected to the upper right side of the base 1. The push plate 13 is horizontally slidably installed inside the guide frame 12. A groove is also provided on the left side of the push plate 13. The electric push rod 14 is fixedly installed on the right side of the guide frame 12. The telescopic end of the electric push rod 14 is connected to the push plate 13. The connecting block 15 is slidably connected up and down inside the groove on the push plate 13. The second adjusting screw 16 is also rotatably connected inside the groove on the push plate 13. A screw is also fixedly connected to the top of the second adjusting screw 16. Button 10, the second adjusting screw 16 is threadedly connected to the connecting block 15, and a clamping wheel 17 is rotatably connected to the left side of the connecting block 15. The clamping wheel 17 is made of nylon material, with moderate hardness, low friction, and will not scratch the workpiece. A clamping block 8 is also fixedly connected to the lower left side of the push plate 13, and this clamping block 8 is horizontally aligned with the clamping block 8 fixed on the turntable 6. In the initial state, the vertical height of the support block 5 is higher than the vertical height of the two clamping blocks 8 fixed on the push plate 13 and the turntable 6, providing the necessary adjustment space for the clamping action and ensuring the effective pre-compression of the damping spring 4, thereby establishing a dynamic vibration damping system. It is understandable that, in order to effectively reduce the friction of the support block 5 during the support process, in practice, rolling bearings can also be set on the working surface of the support block 5 to achieve rolling support for the bolts. Rolling friction can effectively reduce friction.

[0023] like Figure 3 and Figure 4 As shown, it also includes an elastic pad 11. Elastic pads 11 are provided on the clamping surfaces of the clamping block 8 to prevent direct metal contact and damage to the bolt surface, thereby improving the processing quality.

[0024] like Figure 1 and Figure 2 As shown, it also includes foot pads 18. Multiple foot pads 18 are provided on the lower part of the base 1 to ensure that the tooling is placed stably under different ground conditions and to avoid affecting the processing accuracy due to shaking.

[0025] When using this equipment, the operator first places the bolt to be processed horizontally on the support block 5. Then, the electric push rod 14 is started by the controller 2, which drives the push plate 13 to move laterally, tightening the right end of the bolt and making the left end of the bolt abut against the turntable 6 to achieve axial positioning. The stroke of the electric push rod 14 is adjustable and can automatically adapt to the bolt length to ensure that workpieces of different specifications can be accurately clamped.

[0026] After adjustment, since the vertical height of the support block 5 is higher than the two clamping blocks 8 fixed on the turntable 6 and the push plate 13 in the initial state, the left end of the bolt is suspended between the V-shaped grooves between the two clamping blocks 8 on the left side, while the right end is located between the clamping block 8 on the push plate 13 and the pressure wheel 17. The two sides have not yet made contact and are in a pre-positioned state. Then, the operator manually rotates the knobs 10 on the left and right sides of the equipment, which respectively drive the first adjusting screw 9 and the second adjusting screw 16 to rotate. The first adjusting screw 9 drives the left clamping block 8 and the second adjusting screw 16 drives the pressure wheel 17 to move down synchronously along their respective slides, gradually pressing against the upper surface of the bolt and applying clamping force.

[0027] As the clamping force increases, the bolt ends gradually compress the support block 5 downward under the downward pressure of the clamping block 8 and the pressure wheel 17. The bottom of the support block 5 is connected to the telescopic ends of the two dampers 3. During its downward movement, it synchronously compresses the shock-absorbing spring 4 below, storing elastic potential energy. At this time, the system forms a composite clamping structure of "central elastic support" plus "rigid downward pressure at both ends". When the clamping is in place, the lower surfaces of the bolt ends will gradually contact and fit with the lower clamping blocks 8 on the side of the turntable 6 and the side of the push plate 13, achieving dual axial and radial limiting. At the same time, the support block 5 descends due to compression, and its height gradually becomes flush with the clamping blocks 8 on both sides, finally forming a stable three-point support limiting structure, effectively preventing the workpiece from axial movement or radial runout during processing, and ensuring processing accuracy.

[0028] Next, after the processing starts, the motor 7 runs, and its output shaft drives the turntable 6 to rotate. The turntable 6 transmits torque to the bolt through the friction and fitting structure between the left clamping block 8 and the bolt end, driving the bolt to rotate as a whole. At the same time, the outer surface of the bolt keeps in contact with the outer circumference of the clamping wheel 17. Since the clamping wheel 17 is mounted on the rotating shaft through the bearing, it can rotate freely under the drive of the bolt, realizing rolling contact rather than sliding friction, avoiding problems such as slippage or surface scratches. Even during high-speed rotation, the clamping wheel 17 continues to apply the downward pressure set by the preload of the second adjusting screw 16, ensuring clamping stability and transmission reliability.

[0029] During the cutting process, if the bolt vibrates due to fluctuations in cutting force, the support block 5, under the elastic restoring force of the damping spring 4 and the damping energy dissipation of the damper 3, dynamically absorbs and attenuates the vibration energy, significantly suppressing chatter and improving surface finish. Finally, after the machining is completed, the first adjusting screw 9 and the second adjusting screw 16 are rotated in the opposite direction to release the pressure of the clamping block 8 and the pressure wheel 17 on the workpiece. The damping spring 4 returns to its original length, pushing the support block 5 and the workpiece on it to reset upwards. Then, the electric push rod 14 is controlled to retract, causing the push plate 13 to exit the right end of the workpiece, and the machined bolt can be easily removed, completing a complete machining process.

[0030] This invention utilizes the dynamic response of the damping spring 4 and damper 3 to effectively attenuate vibrations caused by cutting forces and prevent bolt bending and deformation. The support block 5, initially higher than the clamping block 8, compresses the spring during clamping, creating a pre-clamping force that helps establish a stable vibration damping system. The V-shaped clamping block 8 and pressure roller 17 adapt to the cylindrical shape of the bolt, providing uniform clamping force. The addition of an elastic pad further protects the workpiece surface and improves machining quality. The adjustable clamping block 8 and push plate accommodate bolts of different lengths, and axial positioning is achieved through electric push rod stroke adjustment, offering a degree of flexibility.

[0031] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vibration-damping fixing fixture for bolt thread machining, characterized in that: The system includes a base (1), a controller (2), dampers (3), shock-absorbing springs (4), a support block (5), a turntable (6), a motor (7), a clamping block (8), a first adjusting screw (9), and a knob (10). The controller (2) is installed on the front right side of the base (1). Two dampers (3) are installed on the upper middle side of the base (1). A V-shaped support block (5) is connected between the telescopic ends of the two dampers (3). A shock-absorbing spring (4) is connected between each of the two dampers (3) and the support block (5). A turntable (6) is rotatably connected to the upper left side of the base (1). The base (1) has a... A motor (7) is fixedly installed on the left side of the part. The output shaft of the motor (7) is connected to the rotating shaft of the turntable (6). A sliding groove is provided on the right side of the turntable (6). Two clamping blocks (8) are arranged symmetrically on the right side of the turntable (6). Both clamping blocks (8) are V-shaped. The upper clamping block (8) is slidably connected inside the sliding groove, and the lower clamping block (8) is fixedly connected to the turntable (6). A first adjusting screw (9) is rotatably connected inside the sliding groove. The first adjusting screw (9) is threadedly connected to the adjacent clamping block (8). A knob (10) is fixedly connected to the top of the first adjusting screw (9).

2. The anti-vibration fixing fixture for bolt thread machining as described in claim 1, characterized in that: It also includes a guide frame (12), a push plate (13), an electric push rod (14), a connecting block (15), a second adjusting screw (16), and a clamping wheel (17). The guide frame (12) is fixedly connected to the upper right side of the base (1). The push plate (13) is horizontally slidably installed inside the guide frame (12). A sliding groove is also provided on the left side of the push plate (13). The electric push rod (14) is fixedly installed on the right side of the guide frame (12). The telescopic end of the electric push rod (14) is connected to the push plate (13). The sliding groove on the push plate (13) is... The groove is connected to the connecting block (15) which slides up and down, and the sliding groove on the push plate (13) is also connected to the second adjusting screw (16) which is rotatably connected. The top of the second adjusting screw (16) is also fixedly connected to the knob (10). The second adjusting screw (16) is threadedly connected to the connecting block (15). The left side of the connecting block (15) is rotatably connected to the pressure wheel (17). The lower left side of the push plate (13) is also fixedly connected to the clamping block (8), and the clamping block (8) is horizontally aligned with the clamping block (8) fixed on the turntable (6).

3. The anti-vibration fixing fixture for bolt thread machining as described in claim 2, characterized in that: It also includes elastic pads (11), and elastic pads (11) are provided on the clamping surfaces of the clamping blocks (8).

4. The anti-vibration fixing fixture for bolt thread machining as described in claim 3, characterized in that: It also includes foot pads (18), and the base (1) has multiple foot pads (18) on its lower part.

5. The anti-vibration fixing fixture for bolt thread machining as described in claim 4, characterized in that: In the initial state, the vertical height of the support block (5) is higher than the vertical height of the two clamping blocks (8) fixed on the push plate (13) and the turntable (6).

6. The anti-vibration fixing fixture for bolt thread machining as described in claim 5, characterized in that: The clamping wheel (17) is made of nylon.

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