A screw straightness correction device

Abstract

A screw straightness correction device includes a worktable, a left mounting seat fixed to the left side of the worktable, a right mounting seat slidably mounted to the right side of the worktable, and a lifting block slidably mounted between the left and right mounting seats. The left and right mounting seats have a left positioning chuck and a right positioning chuck respectively on their opposing sides for clamping and positioning both ends of the screw. A hydraulic cylinder is connected to the lower part of the lifting block, and an upper support block is provided above the lifting block. Two sets of upper support blocks are provided, each mounted on the end of the cylinder rod of a push cylinder. A slider I is connected to the upper part of the push cylinder, and slider I slides horizontally with the upper fixed seat via a slide rail I. The opposing sides of the two sets of slider I are respectively connected to side-push cylinders. This device uses cold-pressing straightening to correct the straightness of the screw. When the screw is positioned, the bending apex points downwards, and the lifting block, in conjunction with the upper support block, corrects the bending of the screw. Positioning is convenient and operation is easy.

Description

Technical Field

[0001] This utility model relates to a screw straightness correction device. Background Technology

[0002] A screw is a commonly used rod-shaped part with threads machined on its outer surface. Due to repeated machining, the straightness of the screw decreases, requiring straightening of some screws after machining to ensure proper use. In existing straightening mechanisms, the screw is typically positioned with the bend apex facing upwards, then corrected by pressing down with a pressure block. However, due to the screw's own weight, the bend apex is always downwards in its free state, requiring manual judgment and adjustment. This operation is cumbersome, has low positioning accuracy, and affects subsequent correction accuracy. Utility Model Content

[0003] To address the shortcomings mentioned above, this utility model provides a screw straightness correction device.

[0004] To achieve the above objectives, this utility model provides a screw straightness correction device, including a worktable, a left mounting seat fixed to the left side of the worktable, a right mounting seat slidably disposed on the right side of the worktable, and a lifting block slidably disposed between the left and right mounting seats. The left and right mounting seats are respectively provided with a left positioning chuck and a right positioning chuck on their opposing sides for clamping and positioning both ends of the screw. A hydraulic cylinder is connected to the lower part of the lifting block, and an upper support block is provided above the lifting block. Two sets of upper support blocks are provided, and the upper support blocks are installed at the end of the cylinder rod of the push cylinder. A slider I is connected to the upper part of the push cylinder, and the slider I slides horizontally with the upper fixed seat via a slide rail I. Side-push cylinders are respectively connected to the opposite sides of the two sets of slider I.

[0005] As a further improvement of this utility model, a straightness tester is also provided above the workbench. The straightness tester is placed on the workbench by a bracket and its height is adjustable.

[0006] As a further improvement of this utility model, the hydraulic cylinder forms a sliding fit with the worktable through a screw-slider mechanism. The screw-slider mechanism includes a slider fixed to the lower part of the hydraulic cylinder. The lower part of the slider is slidably fitted with the worktable through a slide rail. A screw is threadedly installed in the middle of the slider. Both ends of the screw are connected to the worktable through bearing seats. One end of the screw passes through the bearing seat and is connected to a motor.

[0007] As a further improvement of this utility model, the lower part of the right mounting base is fixed to the base, and the base is arranged in a gate-shaped structure above the slide rail, with the lower part of the base forming a sliding fit with the slide rail.

[0008] As a further improvement of this utility model, the upper part of the lifting block is machined with an arc groove that matches the outer diameter of the screw, and the lower part of the upper support block is machined with an arc groove I that corresponds to the arc groove.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. This device uses cold pressing to straighten the screw and correct its straightness. When the screw is positioned, the bending apex points downwards. The lifting block and the support block correct the bending of the screw. Positioning is convenient and easy to operate. It can be used with a straightness tester to detect the straightness of the screw in real time and has high correction accuracy.

[0011] 2. The height and horizontal position of the upper support block are adjustable, and it can support screws of various bending shapes and different sizes during calibration, making it widely applicable. Attached Figure Description

[0012] Figure 1 This is a front view of a screw straightness correction device according to the present invention;

[0013] Figure 2 for Figure 1 View A in the middle;

[0014] Figure 3 This is a side view of the lifting block 5.

[0015] In the diagram: 1. Workbench; 2. Left mounting base; 21. Left positioning chuck; 3. Screw-slider mechanism; 31. Slider; 32. Slide rail; 33. Screw; 34. Bearing seat; 35. Motor; 4. Hydraulic cylinder; 5. Lifting block; 51. Arc groove; 6. Straightness tester; 61. Bracket; 7. Screw; 8. Right mounting base; 81. Right positioning chuck; 82. Base; 9. Upper support block; 91. Arc groove I; 10. Push cylinder; 11. Side push cylinder; 12. Slider I; 13. Slide rail I; 14. Upper fixed base. Detailed Implementation

[0016] like Figure 1As shown, the screw straightness correction device of this utility model includes a worktable 1, a left mounting seat 2 fixed to the left side of the worktable 1, a right mounting seat 8 slidably disposed on the right side of the worktable 1, and a lifting block 5 slidably disposed between the left mounting seat 2 and the right mounting seat 8. A straightness detector 6 is also provided above the worktable 1. The straightness detector 6 is placed on the worktable 1 by a bracket 61 and its height is adjustable. The left mounting seat 2 and the right mounting seat 8 are respectively provided on opposite sides for clamping and positioning the two ends of the screw 7. The lower part of the lifting block 5 is connected to a liquid... Hydraulic cylinder 4 is slidably fitted to worktable 1 via screw-slider mechanism 3. Screw-slider mechanism 3 includes a slider 31 fixed to the lower part of hydraulic cylinder 4. The lower part of slider 31 is slidably fitted to worktable 1 via slide rail 32. A screw 33 is threadedly installed in the middle of slider 31. Both ends of screw 33 are connected to worktable 1 via bearing seats 34. One end of screw 33 passes through bearing seat 34 and connects to motor 35. The lower part of right mounting base 8 is fixed to base 82. Base 82 is a U-shaped structure straddling above slide rail 32, and the lower part of base 82 is slidably fitted to slide rail 32 (see [link]). Figure 2 Above the lifting block 5 is an upper support block 9, of which there are two sets. The upper support block 9 is installed at the end of the cylinder rod of the pushing cylinder 10. The upper part of the pushing cylinder 10 is connected to the slider I 12. The slider I 12 slides with the upper fixed seat 14 in the horizontal direction through the slide rail I 13. The opposite sides of the two sets of sliders I 12 are respectively connected to the side pushing cylinder 11. The upper part of the lifting block 5 is machined with an arc groove 51 to match the outer diameter of the screw 7 (see...). Figure 3 The lower part of the upper support block 9 is machined with a circular arc groove I91 corresponding to the circular arc groove 51.

[0017] This device uses cold-pressing straightening to correct the straightness of the screw. When the screw is positioned, the bending apex points downwards, and the lifting block, together with the upper support block, corrects the bending of the screw. Positioning is convenient and easy to operate. It can be used with a straightness detector to detect the straightness of the screw in real time, and the correction accuracy is high. The height and horizontal position of the upper support block are adjustable, and it can support screws of various bending shapes and different sizes during correction, making it widely applicable.

[0018] In practical use, for ease of understanding of this utility model, it will be described in conjunction with the accompanying drawings;

[0019] During operation, a hoisting mechanism is used to lift the bent screw between the left and right mounting seats. Under the screw's own weight, the bend apex of the screw faces downwards freely. Then, the left and right positioning chucks clamp both ends of the screw. The screw-slider mechanism controls the hydraulic cylinder and lifting block to move directly below the bend apex of the screw. Subsequently, two sets of side-push cylinders push the jacking cylinder and upper support block to the designated position. The jacking cylinder then moves the upper support block down to a position close to the screw. The lifting block then lifts and corrects the bend apex of the screw. (Based on the initial bending amount of the screw and the memory characteristics of the screw material, considering the springback after bending, the amount of bending pressure to be applied to the screw is calculated, thereby determining the lifting height.) Two upper support blocks support the screw. When the bent part of the screw is lifted upward to the specified height, it is held in the lifted state for a certain period of time. Then, the lifting blocks move down to reset, and the upper support blocks move up to reset. The screw rebounds through its own memory force, ensuring a certain straightness. The straightness of the screw is detected in real time by a straightness detector. Finally, the screw can be removed.

[0020] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A screw straightness correction device, characterized by: Includes a workbench (1), a left mounting base (2) fixed to the left side of the workbench (1), a right mounting base (8) slidably disposed on the right side of the workbench (1), and a lifting block (5) slidably disposed between the left mounting base (2) and the right mounting base (8). The left mounting base (2) and the right mounting base (8) are respectively provided with a left positioning chuck (21) and a right positioning chuck (81) on their opposite sides for clamping and positioning both ends of the screw (7). The lower part of the lifting block (5) A hydraulic cylinder (4) is connected. An upper support block (9) is provided above the lifting block (5). There are two sets of upper support blocks (9). The upper support blocks (9) are installed at the end of the cylinder rod of the push cylinder (10). The upper part of the push cylinder (10) is connected to a slider I (12). The slider I (12) forms a sliding fit with the upper fixed seat (14) in the horizontal direction through the slide rail I (13). The two sets of sliders I (12) are connected to the side push cylinder (11) on opposite sides.

2. A screw straightness correction device according to claim 1, characterized in that: A straightness tester (6) is also provided above the workbench (1). The straightness tester (6) is placed on the workbench (1) by a bracket (61) and its height is adjustable.

3. The screw straightness correction device of claim 1, wherein: The hydraulic cylinder (4) is slidably engaged with the worktable (1) through a screw-slider mechanism (3). The screw-slider mechanism (3) includes a slider (31) fixed to the lower part of the hydraulic cylinder (4). The lower part of the slider (31) is slidably engaged with the worktable (1) through a slide rail (32). A screw (33) is threadedly installed in the middle of the slider (31). The two ends of the screw (33) are connected to the worktable (1) through bearing seats (34). One end of the screw (33) passes through the bearing seat (34) and is connected to the motor (35).

4. A screw straightness correction device according to claim 3, characterized in that: The lower part of the right mounting base (8) is fixed to the base (82). The base (82) is arranged in a gate-shaped structure above the slide rail (32). The lower part of the base (82) and the slide rail (32) form a sliding fit.

5. The screw straightness correction device of claim 1, wherein: The upper part of the lifting block (5) is machined with an arc groove (51) that matches the outer diameter of the screw (7), and the lower part of the upper support block (9) is machined with an arc groove I (91) that corresponds to the arc groove (51).

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