Cylindrical workpiece cutting auxiliary jig

Abstract

The utility model relates to the technical field of fixture, especially a cylindrical workpiece cutting auxiliary fixture, including at least two groups of support wheel groups that are arranged along the workpiece axial interval, the support wheel group of one end is equipped with the compression assembly above, the compression assembly includes the frame, the frame is connected with the lever through the pivot rotation, the pivot axis is perpendicular to the workpiece axis arrangement, the lever short arm end has the pressing block, the long arm end rotation is connected with the compression wheel, the compression wheel can roll on the workpiece outer circumferential surface, the lever one end is installed with the spring that can make the pressing block adhere to the workpiece between the frame, when adjusting the angle, the compression wheel can adhere to and roll in the workpiece outer circumferential surface, makes the workpiece realize smooth rotation under the condition that the clamping structure does not need to loosen, after angle adjustment, the lever resets automatically, makes the pressing block again compresses the workpiece. Can keep the workpiece stable in the cutting whole process, angle adjustment is convenient, to improve the efficiency and reliability of sectional cutting.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to an auxiliary fixture for cutting cylindrical workpieces. Background Technology

[0002] In the metalworking industry, the cutting of cylindrical rods is typically accomplished using handheld or benchtop cutting machines. To ensure accurate cutting positioning and prevent workpiece displacement during operation, clamps are used to secure the cylindrical rod. During cutting, the operator usually pushes the cutting blade radially into the workpiece. As the cutting depth increases, the contact area between the cutting blade and the rod increases, leading to increased cutting resistance and frictional heat. This can easily cause a decrease in the cutting blade's rotation speed, accelerated wear, or even jamming. Therefore, when cutting large-diameter cylindrical rods, it is often necessary to first cut to a certain depth, then rotate the rod at a certain angle for segmented cutting to achieve the final separation.

[0003] In addition, since the maximum cutting depth of the cutting blade is limited by its radius, when the diameter of the cutting blade is small and the diameter of the cylindrical rod is large, the radius of the cutting blade is not enough to penetrate the entire rod. Even if straight cutting is performed, the rod cannot be completely cut off. Therefore, when cutting large-diameter cylindrical rods, it is usually necessary to manually or semi-automatically rotate the rod step by step and cut it in multiple segments before it can be finally cut off.

[0004] Most existing clamps use a screw clamping structure. If the rotation angle of the cylindrical rod needs to be changed, it is usually necessary to first loosen the clamping structure with a screw, then rotate the rod, and finally re-tighten it with a screw. This process is cumbersome. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that most existing clamps adopt a screw clamping structure. If the rotation angle of the cylindrical rod needs to be changed, it is usually necessary to first loosen the clamping structure with a screw, then rotate the rod, and finally re-lock it with a screw. This process is cumbersome. Therefore, this utility model proposes an auxiliary clamp for cutting cylindrical workpieces.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cylindrical workpiece cutting auxiliary fixture includes at least two sets of support wheels spaced apart along the workpiece axis, and a clamping assembly located above one end of the support wheel set. The clamping assembly includes a frame, and a lever is rotatably connected to the frame via a pin. The pin axis is perpendicular to the workpiece axis. The lever has a pressure block at its short arm end and a pressure roller rotatably connected to its long arm end. The pressure roller can roll on the outer circumferential surface of the workpiece. A spring is installed between one end of the lever and the frame to make the pressure block press against the workpiece.

[0008] The outer circumference of the pressure roller has an arc surface structure.

[0009] The spring is a tension spring, which is installed between the long arm end of the lever and the frame.

[0010] The spring is a thrust spring, which is installed between the short arm end of the lever and the frame.

[0011] A support rod is installed above the long arm of the lever. The support rod passes through a guide hole in the frame and can move within the guide hole, which is set along the length of the workpiece.

[0012] The frame is threaded with a vertically arranged screw, and a support frame is rotatably connected to the bottom end of the screw. The support frame is vertically guided to the frame, and the support frame is rotatably connected to the lever through the pin.

[0013] The support wheel assembly includes two rotatable support wheels, which are arranged in an isosceles triangle with the pressure wheel.

[0014] One of the support wheels is connected to a rotary motor.

[0015] This utility model proposes an auxiliary clamping device for cutting cylindrical workpieces. The advantages are as follows: the device automatically clamps the pressure block against the workpiece using a spring-driven lever, achieving continuous and stable clamping; when angle adjustment is needed, the pressure roller can press against and roll on the outer circumference of the workpiece, allowing the workpiece to rotate smoothly without loosening the clamping structure; after angle adjustment, the lever automatically resets, causing the pressure block to clamp the workpiece again. The overall structure maintains workpiece stability and facilitates angle adjustment throughout the cutting process, thereby improving the efficiency and reliability of segmented cutting. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the workpiece clamping state according to the present invention;

[0017] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the clamping component of this utility model;

[0019] Figure 4 This is a schematic diagram of the main structure of the clamping component of this utility model.

[0020] In the diagram: 1. Support wheel assembly; 2. Pressure block; 3. Pin shaft; 4. Support frame; 5. Screw; 6. Lever; 7. Frame; 8. Support rod; 9. Guide hole; 10. Spring; 11. Pressure wheel; 12. Rotary motor. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-4 A cylindrical workpiece cutting auxiliary fixture includes at least two sets of support wheel groups 1 spaced apart along the workpiece axis. A clamping assembly is provided above one of the support wheel groups 1. The clamping assembly includes a frame 7. The frame 7 is rotatably connected to a lever 6 via a pin 3. The axis of the pin 3 is perpendicular to the axis of the workpiece. The short arm end of the lever 6 has a pressure block 2, and the long arm end is rotatably connected to a pressure roller 11. The pressure roller 11 can roll on the outer circumferential surface of the workpiece. A spring 10 that can cause the pressure block 2 to press against the workpiece is installed between one end of the lever 6 and the frame 7.

[0023] Reference Figures 1 to 4 When the cylindrical workpiece is placed on the support wheel assembly 1, the lever 6 rotates around the pin 3 towards the workpiece under the action of the spring 10, so that the pressure block 2 at the short arm end of the lever 6 is pressed tightly against the outer circumferential surface of the workpiece, achieving initial clamping and positioning of the workpiece. During the cutting process, as the cutting blade gradually pushes into the workpiece, the resistance increases. The pressure block 2 remains in a stable pressing state under the continuous force of the spring 10, thereby preventing the workpiece from rotating or moving axially. When it is necessary to change the rotation angle of the workpiece for segmented cutting, an external force can be applied to the long arm end of the lever 6, so that the pressure roller 11 presses against the outer circumferential surface of the workpiece. At this time, the support wheel assembly 1 and the pressure roller 11 limit the workpiece from different directions, so that the workpiece can rotate smoothly around its own axis when driven by external force. During the rolling of the pressure roller 11 on the outer circumferential surface of the workpiece, the workpiece obtains radial positioning at the same time during rotation, thereby ensuring the smoothness and stability of the rotation operation. After the angle is adjusted, the external force on the lever 6 is removed, and the pressure block 2 at the short arm end of the lever 6 is pressed tightly against the outer circumferential surface of the workpiece again for subsequent cutting.

[0024] The external force can be manually rotated by a worker or electrically. For example, the support wheel assembly 1 includes two rotatable support wheels, which are arranged in an isosceles triangle with the pressure wheel 11. One of the support wheels is connected to a rotary motor 12. The rotary motor 12 drives the support wheel to rotate, thereby causing the workpiece to rotate.

[0025] The outer circumferential surface of the pressure roller 11 is an arc surface structure. The axis of the pressure roller 11 is not parallel to the axis of the workpiece. Therefore, the arc surface structure is designed to better fit the outer circumferential surface of the workpiece.

[0026] In one embodiment, spring 10 is a tension spring, which is installed between the long arm end of lever 6 and frame 7; in another embodiment, spring 10 is a thrust spring, which is installed between the short arm end of lever 6 and frame 7.

[0027] The choice between tension springs and thrust springs depends on the working conditions.

[0028] A support rod 8 is installed above the long arm end of lever 6. The support rod 8 passes through the guide hole 9 of frame 7 and can move within the guide hole 9, which is set along the length of the workpiece. By pushing and pulling the support rod 8, lever 6 is rotated, switching the working state of pressure block 2 and pressure roller 11.

[0029] The frame 7 is threadedly connected to a vertically positioned screw 5. A support frame 4 is rotatably connected to the bottom of the screw 5. The support frame 4 is vertically guided by the frame 7 and is rotatably connected to a lever 6 via a pin 3. The height of the lever 6 can be adjusted within a small range, accommodating workpieces of various sizes within a certain range.

[0030] Reference Figures 1 to 4 This device uses a pressure block 2 mounted on the short arm of lever 6, with a spring 10 continuously applying force to automatically press the pressure block 2 against the cylindrical workpiece placed on the support wheel assembly 1, achieving basic clamping. When it is necessary to adjust the workpiece angle, the long arm of lever 6 is pushed to make the pressure roller 11 press against the workpiece. The pressure roller 11 rolls on the outer circumference of the workpiece to achieve smooth rotation and maintain the radial positioning of the workpiece during rotation. After the angle adjustment is completed, the external force is removed, and lever 6, under the action of spring 10, presses the pressure block 2 against the workpiece again, thus completing the switch between clamping and cutting. The overall structure, through the coordinated operation of lever 6, pressure block 2, pressure roller 11, and support wheel assembly 1, achieves the functions of automatic clamping, stable rotation, and rapid angle adjustment, making the segmented cutting process of cylindrical workpieces more convenient, efficient, and stable.

[0031] It should be further explained that when the operator pushes the support rod 8 to rotate the lever 6 around the pin 3 away from the workpiece, the pressure block 2 gradually detaches from the outer circumference of the workpiece, and the pressure roller 11 moves towards the workpiece until it is in contact with the workpiece, thus completing the angle adjustment state before cutting. When the operator stops applying external force, the lever 6 automatically rotates back towards the workpiece under the action of the spring 10, causing the pressure block 2 to press the workpiece again, thus restoring the cutting clamping state. When the pressure roller 11 is in contact with the outer circumference of the workpiece, the force it applies to the workpiece is radial, thus continuously providing lateral support during the rotation of the workpiece, preventing the workpiece from shifting in the opposite direction to the pressure roller, forming a stable radial constraint. The two support rollers in the support roller group 1 contact the lower outer circumference of the workpiece, forming the lower support of the workpiece, allowing the workpiece to rotate on the support rollers around its own axis. The rotary motor 12 drives the support rollers to rotate through its output shaft, and the support rollers and the workpiece achieve friction transmission through contact on the outer circumference, thereby driving the workpiece to rotate around its own axis.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technical solution, concept, or design obtained by those skilled in the art by making equivalent substitutions or changes based on the technical solution and utility model concept disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylindrical workpiece cutting auxiliary fixture, comprising at least two sets of support wheel groups (1) spaced apart along the workpiece axial direction, and a clamping assembly located above one end of the support wheel group (1), characterized in that, The clamping assembly includes a frame (7), which is rotatably connected to a lever (6) via a pin (3). The axis of the pin (3) is perpendicular to the axis of the workpiece. The lever (6) has a pressure block (2) at its short arm end and a pressure roller (11) rotatably connected to its long arm end. The pressure roller (11) can roll on the outer circumference of the workpiece. A spring (10) is installed between one end of the lever (6) and the frame (7) to make the pressure block (2) press against the workpiece.

2. The cylindrical workpiece cutting auxiliary fixture according to claim 1, characterized in that, The outer circumference of the pressure roller (11) is an arc surface structure.

3. The cylindrical workpiece cutting auxiliary fixture according to claim 1, characterized in that, The spring (10) is a tension spring, which is installed between the long arm end of the lever (6) and the frame (7).

4. The cylindrical workpiece cutting auxiliary fixture according to claim 1, characterized in that, The spring (10) is a thrust spring, which is installed between the short arm end of the lever (6) and the frame (7).

5. The cylindrical workpiece cutting auxiliary fixture according to claim 1, characterized in that, A support rod (8) is installed above the long arm end of the lever (6). The support rod (8) passes through the guide hole (9) of the frame (7). The support rod (8) can move within the guide hole (9). The guide hole (9) is set along the length direction of the workpiece.

6. A cylindrical workpiece cutting auxiliary fixture according to any one of claims 1-5, characterized in that, The frame (7) is threaded with a vertically arranged screw (5), and a support frame (4) is rotatably connected to the bottom end of the screw (5). The support frame (4) is vertically guided to the frame (7), and the support frame (4) is rotatably connected to the lever (6) through the pin (3).

7. A cylindrical workpiece cutting auxiliary fixture according to any one of claims 1-5, characterized in that, The support wheel assembly (1) includes two rotatable support wheels, which are arranged in an isosceles triangle with the pressure wheel (11).

8. The cylindrical workpiece cutting auxiliary fixture according to claim 7, characterized in that, One of the support wheels is connected to a rotary motor (12).

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