Clamping and fixing mechanism for screw machining

Abstract

The utility model discloses a clamping and fixing mechanism for screw machining, which relates to the technical field of bolt machining and comprises a main clamping frame, a detachable clamping frame, a fixing bolt, a rubber pad, a connecting chuck and a transmission shaft. Through the structural design that the main clamping frame and the detachable clamping frame are matched with each other, a set of clamp can be shared in the whole screw machining process, the trouble caused by frequent disassembly and assembly machining is avoided, and the machining efficiency can be effectively improved; the servo motor is used for driving the clamp and the workpiece to turn over, the hydraulic cylinder drives the two main clamping frames to be separated outwards through stretching and retracting of the rod body, and unloading and reloading are facilitated. In addition, a force bearing sleeve is arranged and inserted between the main clamping frame and the fixing base, the pressure of the servo motor, the hydraulic cylinder and other components and the force in the vertical direction caused in the machining process can be borne, and damage to the rod shaft part of the motor or the hydraulic cylinder is avoided.

Description

Technical Field

[0001] This utility model relates to the field of bolt processing technology, specifically a clamping and fixing mechanism for screw processing. Background Technology

[0002] Screw machining is a multi-step precision manufacturing process. The processed wire is cold-forged to form the basic shape of the screw, and then the threads are formed through a thread rolling process. The ends of the screw can be sharpened by adding cutting equipment. The entire process requires a clamping and fixing mechanism to ensure the stability of the screw workpiece during machining.

[0003] Existing technologies require clamping components to transfer screw workpieces between various workstations during screw processing. Furthermore, the workpieces need to be re-clamped and fixed in each processing step, which is time-consuming and affects processing efficiency. In addition, existing clamping and fixing structures lack protection for power devices such as hydraulic cylinders and electric motors, and the axial pressure during processing can damage the power devices. Therefore, we propose a clamping and fixing mechanism for screw processing. Utility Model Content

[0004] The technical problem this utility model aims to solve is to overcome the existing defects and provide a clamping and fixing mechanism for screw processing. Through the structural design of the main clamp and the detachable clamp, a single set of clamps can be used throughout the screw processing process, avoiding the trouble caused by frequent disassembly and assembly, and effectively improving processing efficiency. A servo motor is used to drive the clamp and workpiece to rotate, and the hydraulic cylinder, through the extension and retraction of the rod, drives the two main clamps to separate outward, facilitating unloading and reloading. In addition, by setting a load-bearing sleeve and inserting it between the main clamp and the fixed base, the pressure of the servo motor, hydraulic cylinder and other components, as well as the vertical force generated during processing, can be borne, avoiding damage to the rod shaft of the motor or hydraulic cylinder, thus effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a clamping and fixing mechanism for screw processing, comprising a main clamp, a detachable clamp, a fixing bolt, a rubber pad, a connecting chuck, and a drive shaft. The main clamp has two sections, front and rear, which fit together to form a cuboid structure. An insertion slot is provided on the lower side of each main clamp, and a detachable clamp of the same square structure is inserted into the slot on the lower side of each main clamp. A slot structure is provided in the middle of the middle of adjacent sides of the two main clamps. The upper half of the slot structure is circular, and the lower half is a long column, extending downwards through the two detachable clamps. Threaded holes are provided on the lower left and right sides of the main clamp. The threaded section of the fixing bolt passes through the threaded hole and rests against the side of the detachable clamp. A rubber pad is embedded between the head of the fixing bolt and the main clamp. A connecting chuck is fixedly connected to the end of the main clamp away from the slot structure. A drive shaft is fixedly connected to the center of the connecting chuck. An annular slot, concentric with the chuck, is provided on the end face of the connecting chuck.

[0006] When heading the screw wire, the main clamp and the detachable clamp work together to hold and fix the wire segment. The detachable clamp is used to clamp the lower middle part of the wire segment. At this time, the heading machine can form the screw head in the circular segment of the internal slot structure of the two main clamps. After the screw head is formed, the servo motors on both sides are powered on and drive the main clamp and the screw workpiece in the middle to rotate through the drive shaft. When the screw workpiece rotates to the horizontal, the detachable clamp can be removed by unscrewing the fixing bolt, thus exposing the shaft segment of the screw workpiece, which is convenient for threading. After the threading is completed, the screw workpiece is rotated again so that the thread segment of the screw workpiece faces upward and the head faces downward. This makes it convenient to cut the end of the screw shaft to form the screw tip or chamfer structure. After cutting, the clamps on both sides separate, and the formed screw falls off automatically. Through the structural design of the main clamp and the detachable clamp working together, a set of clamps can be used throughout the screw processing process, avoiding the trouble caused by frequent disassembly and assembly, and effectively improving processing efficiency. The rubber pad is used to improve the tightness of the fixing bolt when tightening.

[0007] Furthermore, the system also includes mounting sleeves, servo motors, hydraulic cylinders, and mounting bases. A mounting sleeve is installed at the drive shaft on both the front and rear sides of the main clamp. A servo motor is embedded in the end of the mounting sleeve closest to the drive shaft, with the output shaft of the servo motor inserted and fixed inside the drive shaft. A hydraulic cylinder is embedded in the outer end of the mounting sleeve, with its extension / retraction end facing outwards and fixedly connected to the center of the mounting base. The mounting base is a square structure with two units, one at the front and one at the rear. The mounting sleeves are used to mount the servo motors and hydraulic cylinders. The servo motors drive the clamps and workpieces to rotate, and the hydraulic cylinders, through the extension and retraction of their rods, cause the two main clamps to separate outwards, facilitating unloading and reloading.

[0008] Furthermore, it also includes a snap-fit ​​collar, a groove, a fixing block, and a load-bearing sleeve. The snap-fit ​​collar is fixedly connected to one end of the fixing seat near the middle side of the device. The snap-fit ​​collar and the center of the connecting chuck are on the same horizontal axis. An annular groove is formed on the inner side of the fixing seat around the snap-fit ​​collar. The groove is the same size as the annular groove on the outer end face of the connecting chuck. A circular fixing block is fixedly connected to the end of the telescopic end of the hydraulic cylinder. The fixing block is fixedly connected to the fixing seat by bolts. The load-bearing sleeve is fitted on the outside of the mounting sleeve, and one end of it is fixedly connected to the annular groove on the outside of the connecting chuck. The other end of the load-bearing sleeve is fitted on the outside of the snap-fit ​​collar and is slidably connected to the snap-fit ​​collar. When clamping the workpiece, the end of the load-bearing sleeve is inserted into the port of the groove. By setting a load-bearing sleeve and inserting it between the main clamp and the fixed base, the pressure of components such as the servo motor and hydraulic cylinder, as well as the vertical force generated during processing, can be borne, avoiding damage to the shaft of the motor or hydraulic cylinder. The load-bearing sleeve is fixedly connected to the main clamp, and the other end is movably connected to the clamping collar. Driven by the hydraulic cylinder, the load-bearing sleeve moves synchronously with the main clamp. When the main clamp is retracted, the load-bearing sleeve can gradually penetrate deeper into the clamping groove, always maintaining the effect of bearing the vertical pressure.

[0009] Furthermore, it also includes fixing feet. Each of the four corners of the fixing base on its inward-facing side has a quarter-circle groove, forming four fixing feet. Bolt through holes are provided inside the fixing feet. By installing bolts at the fixing feet, the fixing base can be installed and fixed to the external frame.

[0010] Furthermore, it also includes a tilt sensor, which is embedded inside the main card holder on the left side. The tilt sensor is installed inside the left front side of the main card holder and is bidirectionally electrically connected to the controller of the servo motor. The tilt sensor is used to detect the spatial angle of the screw wire segment to ensure that the servo motor adjusts the screw wire segment to an absolutely horizontal or vertical state.

[0011] Furthermore, it also includes reinforcing blocks. Four right-angled trapezoidal reinforcing blocks are fixedly connected to the outer side of the drive shaft near the connecting chuck. The reinforcing blocks are arranged in a circumferential array, and their longer base sides are fixedly connected to the connecting chuck. The reinforcing blocks are used to improve the tightness of the connection between the drive shaft and the connecting chuck.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This clamping and fixing mechanism for screw processing has the following advantages:

[0013] 1. Through the structural design of the main clamp and the detachable clamp working together, a set of fixtures can be used throughout the screw processing process, avoiding the trouble caused by frequent disassembly and assembly, and effectively improving processing efficiency; the servo motor is used to drive the fixture and workpiece to rotate, and the hydraulic cylinder drives the two main clamps to separate outwards through the extension and retraction of the rod, which is convenient for unloading and reloading.

[0014] 2. By setting a load-bearing sleeve and inserting it between the main frame and the fixed base, the pressure of the servo motor, hydraulic cylinder and other components, as well as the vertical force caused during processing, can be borne, avoiding damage to the shaft of the motor or hydraulic cylinder.

[0015] 3. This utility model, through the structural design of the main clamp and the detachable clamp working together, can use a single set of fixtures throughout the screw processing process, avoiding the trouble caused by frequent disassembly and assembly, and effectively improving processing efficiency; the servo motor is used to drive the fixture and workpiece to rotate, and the hydraulic cylinder, through the extension and retraction of the rod, drives the two main clamps to separate outwards, facilitating unloading and reloading; in addition, by setting a load-bearing sleeve and inserting it between the main clamp and the fixed base, the pressure of the servo motor, hydraulic cylinder and other components, as well as the vertical force generated during processing, can be borne, avoiding damage to the rod shaft of the motor or hydraulic cylinder. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the right front side structure of this utility model;

[0017] Figure 2 This is a schematic diagram of a partial structure on the right side of this utility model;

[0018] Figure 3 This is a schematic diagram of the lower part of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the load-bearing sleeve in this utility model.

[0020] In the diagram: 1 Main card holder, 2 Detachable card holder, 3 Fixing bolt, 4 Rubber pad, 5 Connecting chuck, 6 Drive shaft, 7 Mounting sleeve, 8 Servo motor, 9 Hydraulic cylinder, 10 Fixing seat, 11 Snap-fit ​​collar, 12 Card slot, 13 Fixing block, 14 Tilt sensor, 15 Reinforcing block, 16 Fixing foot, 17 Load-bearing sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This embodiment provides a technical solution: a clamping and fixing mechanism for screw processing, including a main clamp 1, a detachable clamp 2, a fixing bolt 3, a rubber pad 4, a connecting chuck 5, and a drive shaft 6. The main clamp 1 has two parts, front and rear, which fit together to form a cuboid structure. An insertion slot is provided on the lower side of each main clamp 1, and a detachable clamp 2, also square in structure, is inserted into the slot on the lower side of each main clamp 1. A slot structure is provided in the middle of the middle of adjacent sides of the two main clamp 1s. The upper half of the slot structure... It has a circular structure with a long column at the bottom and two detachable card holders 2 running downwards. Threaded holes are opened on the lower left and right sides of the main card holder 1. The threaded section of the fixing bolt 3 passes through the threaded hole and abuts against the side of the detachable card holder 2. A rubber pad 4 is embedded between the head of the fixing bolt 3 and the main card holder 1. A connecting chuck 5 is fixedly connected to the end of the main card holder 1 away from the card slot structure. A drive shaft 6 is fixedly connected to the center of the connecting chuck 5. An annular card slot concentric with the chuck is opened on the end face of the connecting chuck 5.

[0023] When heading the screw wire, the main clamp 1 and the detachable clamp 2 together clamp and fix the wire segment. The detachable clamp 2 is used to clamp the lower middle part of the wire segment. At this time, the heading machine can form the screw head in the circular segment of the internal slot structure of the two main clamps 1. After the screw head is formed, the servo motors 8 on both sides are powered on and drive the main clamp 1 and the screw workpiece to rotate through the drive shaft 6. When the screw workpiece rotates to a horizontal position, the detachable clamp 2 can be removed by unscrewing the fixing bolt 3, thereby exposing the shaft segment of the screw workpiece. This facilitates the heading of the screw. Threading is performed; after threading is completed, the screw workpiece is rotated further so that the threaded section of the screw workpiece faces upward and the head faces downward. At this time, it is convenient to cut the end of the screw shaft to form the screw tip or chamfer structure. After cutting, the clamps on both sides separate, so that the formed screw falls off automatically. Through the structural design of the main clamp 1 and the detachable clamp 2 working together, a set of clamps can be used throughout the screw processing, avoiding the trouble caused by frequent disassembly and assembly, and effectively improving processing efficiency. The rubber pad 4 is used to improve the tightness of the fixing bolt 3 when tightening.

[0024] It also includes mounting sleeves 7, servo motors 8, hydraulic cylinders 9, and fixed seats 10. A mounting sleeve 7 is provided at the drive shaft 6 on both the front and rear sides of the main clamp 1. A servo motor 8 is embedded in the end of the mounting sleeve 7 closest to the drive shaft 6, with the output shaft of the servo motor 8 inserted and fixed inside the drive shaft 6. A hydraulic cylinder 9 is embedded in the outer end of the mounting sleeve 7, with its telescopic end facing outwards and fixedly connected to the center of the fixed seat 10. The fixed seat 10 has a square structure and two positions, front and rear. The mounting sleeves 7 are used to mount the servo motors 8 and hydraulic cylinders 9. The servo motor 8 drives the fixture and workpiece to rotate. The hydraulic cylinder 9, through the extension and retraction of its rod, drives the two main clamps 1 to separate outwards, facilitating unloading and reloading.

[0025] It also includes a snap-fit ​​collar 11, a slot 12, a fixing block 13, and a load-bearing sleeve 17. The snap-fit ​​collar 11 is fixedly connected to one end of the fixing seat 10 near the middle side of the device. The snap-fit ​​collar 11 and the center of the connecting chuck 5 are on the same horizontal axis. An annular slot 12 is formed on the inner side of the fixing seat 10 and around the snap-fit ​​collar 11. The slot 12 is the same size as the annular slot on the outer end face of the connecting chuck 5. A circular fixing block 13 is fixedly connected to the end of the telescopic end of the hydraulic cylinder 9. The fixing block 13 is fixedly connected to the fixing seat 10 by bolts. The load-bearing sleeve 17 is sleeved on the outside of the mounting sleeve 7, and one end of it is fixedly connected to the annular slot on the outside of the connecting chuck 5. The other end of the load-bearing sleeve 17 is sleeved on the outside of the snap-fit ​​collar 11 and is slidably connected to the snap-fit ​​collar 11. When clamping the workpiece, the end of the load-bearing sleeve 17 is inserted into the port of the slot 12. By setting a load-bearing sleeve 17 and inserting it between the main clamp 1 and the fixed base 10, the pressure of components such as the servo motor 8 and the hydraulic cylinder 9, as well as the vertical force generated during processing, can be borne, avoiding damage to the shaft of the servo motor 8 and the hydraulic cylinder 9. The load-bearing sleeve 17 is fixedly connected to the main clamp 1, and its other end is movably connected to the clamping collar 11. Driven by the hydraulic cylinder 9, the load-bearing sleeve 17 moves synchronously with the main clamp 1. When the main clamp 1 is removed, the load-bearing sleeve 17 can gradually penetrate deeper into the groove 12, always maintaining the effect of bearing the vertical pressure.

[0026] It also includes fixing feet 16. Each of the four corners of the fixing base 10 on the inward side has a quarter-circle groove, thus forming four fixing feet 16. The fixing feet 16 have bolt through holes inside. By installing bolts at the fixing feet 16, the fixing base 10 can be installed and fixed to the external frame.

[0027] It also includes a tilt sensor 14, which is embedded inside the main card holder 1 on the left side. The tilt sensor 14 is embedded inside the front left side of the main card holder 1 and is bidirectionally electrically connected to the controller of the servo motor 8. The tilt sensor 14 is used to detect the spatial angle of the screw wire segment to ensure that the servo motor 8 adjusts the screw wire segment to an absolutely horizontal or vertical state.

[0028] It also includes reinforcing blocks 15. Four right-angled trapezoidal reinforcing blocks 15 are fixedly connected to the outer side of the drive shaft 6 near the connecting chuck 5. The reinforcing blocks 15 are arranged in a circumferential array, and their longer base sides are fixedly connected to the connecting chuck 5. The reinforcing blocks 15 are used to improve the tightness of the connection between the drive shaft 6 and the connecting chuck 5.

[0029] The working principle of the clamping and fixing mechanism for screw processing provided by this utility model is as follows: This mechanism, through the structural design of the main clamp 1 and the detachable clamp 2 working together, allows for the use of a single set of clamps throughout the entire screw processing process, avoiding the hassle of frequent disassembly and assembly, and effectively improving processing efficiency. The servo motor 8 drives the clamp and workpiece to rotate, and the hydraulic cylinder 9, through the extension and retraction of its rod, drives the two main clamps 1 to separate outwards, facilitating unloading and reloading. When heading the screw wire, the main clamp 1 and the detachable clamp 2 jointly clamp and fix the wire segment. The detachable clamp 2 is used to clamp the lower middle part of the wire segment. At this time, a heading machine can be used on both sides... The screw head is formed within the circular segment of the internal slot structure of the main clamp 1. After the screw head is formed, the servo motors 8 on both sides are powered on and drive the main clamp 1 and the screw workpiece to rotate via the transmission shaft 6. When the screw workpiece rotates to a horizontal position, the detachable clamp 2 can be disassembled by unscrewing the fixing bolt 3, thereby exposing the shaft segment of the screw workpiece. This facilitates thread processing on the screw. After thread processing is completed, the screw workpiece is rotated further so that the thread segment of the screw workpiece faces upward and the head faces downward. This facilitates cutting the end of the screw shaft to form the screw tip or chamfer structure. After cutting is completed, the clamps on both sides separate, allowing the formed screw to fall off automatically. This mechanism, by setting a load-bearing sleeve 17 and inserting it between the main clamp 1 and the fixed base 10, can bear the pressure of components such as the servo motor 8 and hydraulic cylinder 9, as well as the vertical force generated during processing, thus preventing damage to the shaft parts of the servo motor 8 and hydraulic cylinder 9. The mounting sleeve 7 is used for the installation of the servo motor 8 and hydraulic cylinder 9. The load-bearing sleeve 17 is fixedly connected to the main clamp 1, and its other end is movably connected to the clamping collar 11. Driven by the hydraulic cylinder 9, the load-bearing sleeve 17 moves synchronously with the main clamp 1. When the main clamp 1 is retracted, the load-bearing sleeve 17 can gradually penetrate deeper into the clamping groove 12, always maintaining the effect of bearing vertical pressure. In addition, by installing bolts at the fixed feet 16, the fixed base 10 can be installed and fixed to the external frame. The tilt sensor 14 is used to detect the spatial angle of the screw wire segment to ensure that the servo motor 8 adjusts the screw wire segment to an absolutely horizontal or vertical state. The reinforcing block 15 is used to improve the tightness of the connection between the drive shaft 6 and the connecting chuck 5.

[0030] It is worth noting that, in the above embodiments, the input terminal of the servo motor 8 is electrically connected to the output terminal of the external power supply through the controller, and the input terminal of the hydraulic cylinder 9 is electrically connected to the output terminal of the external power supply through the external control switch group. The control switch group controls the operation of the servo motor 8 and the hydraulic cylinder 9 using methods commonly used in the prior art.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A clamping and fixing mechanism for screw processing, characterized in that: The system includes a main card holder (1), a detachable card holder (2), a fixing bolt (3), a rubber pad (4), a connecting chuck (5), and a drive shaft (6). The main card holder (1) has two parts, one in the front and one in the back, which fit together to form a cuboid structure. The lower side of the main card holder (1) has an insertion slot. Each main card holder (1) has a detachable card holder (2) with a square structure inserted into the slot on its lower side. The middle of the two main card holders (1) on adjacent sides has a card slot structure. The upper half of the card slot structure is circular, and the lower half is a long column. Two detachable card holders (2) are inserted downwards. Threaded holes are provided on the lower left and right sides of the main card holder (1). The threaded section of the fixing bolt (3) passes through the threaded hole and presses against the side of the detachable card holder (2). A rubber pad (4) is embedded between the head of the fixing bolt (3) and the main card holder (1). A connecting chuck (5) is fixedly connected to the end of the main card holder (1) away from the card slot structure. A drive shaft (6) is fixedly connected to the center of the connecting chuck (5). An annular card slot concentric with the chuck is provided on the end face of the connecting chuck (5).

2. The clamping and fixing mechanism for screw processing according to claim 1, characterized in that: It also includes a mounting sleeve (7), a servo motor (8), a hydraulic cylinder (9) and a fixed seat (10). A mounting sleeve (7) is provided at the transmission shaft (6) on both the front and rear sides of the main card frame (1). A servo motor (8) is embedded in the end of the mounting sleeve (7) near the transmission shaft (6). The output shaft of the servo motor (8) is inserted into and fixed inside the transmission shaft (6). A hydraulic cylinder (9) is embedded in the outer end of the mounting sleeve (7). The telescopic end of the hydraulic cylinder (9) is set outward and fixedly connected to the center position of the fixed seat (10). The fixed seat (10) is a square structure and has two parts, front and rear.

3. The clamping and fixing mechanism for screw processing according to claim 2, characterized in that: It also includes a snap-fit ​​collar (11), a snap-fit ​​groove (12), a fixing block (13), and a load-bearing sleeve (17). The snap-fit ​​collar (11) is fixedly connected to one end of the fixing seat (10) near the middle side of the device. The snap-fit ​​collar (11) and the center of the connecting chuck (5) are on the same horizontal axis. An annular snap-fit ​​groove (12) is provided on the inner side of the fixing seat (10) and around the snap-fit ​​collar (11). The snap-fit ​​groove (12) is the same size as the annular snap-fit ​​groove on the outer end face of the connecting chuck (5). The hydraulic cylinder (9) extends... A circular fixing block (13) is fixedly connected to the end of the constricted end. The fixing block (13) is fixedly connected to the fixing seat (10) by bolts. The load-bearing sleeve (17) is sleeved on the outside of the mounting sleeve (7), and one end of it is fixedly connected to the annular groove on the outside of the connecting chuck (5). The other end of the load-bearing sleeve (17) is sleeved on the outside of the snap ring (11) and is slidably connected to the snap ring (11). When clamping the workpiece, the end of the load-bearing sleeve (17) is inserted into the port of the slot (12).

4. The clamping and fixing mechanism for screw processing according to claim 3, characterized in that: It also includes fixing feet (16), and the fixing base (10) has a quarter-circle groove at each of the four corners on the inward side, thus forming four fixing feet (16). The fixing feet (16) have bolt through holes inside.

5. The clamping and fixing mechanism for screw processing according to claim 1, characterized in that: It also includes a tilt sensor (14), which is embedded in the main card holder (1) on the left side. The tilt sensor (14) is embedded in the front left side of the main card holder (1) and is bidirectionally electrically connected to the controller of the servo motor (8).

6. The clamping and fixing mechanism for screw processing according to claim 1, characterized in that: It also includes reinforcing blocks (15). Four right-angled trapezoidal reinforcing blocks (15) are fixedly connected to the outer side of the drive shaft (6) near the connecting chuck (5). The reinforcing blocks (15) are arranged in a circumferential array, and their longer bottom edge is fixedly connected to the connecting chuck (5).

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