Bending correction device for screw
Through the design of the screw bending correction device, the combination of the hydraulic tailstock and the jack can achieve high-precision correction of the screw, which solves the problem of low positioning accuracy in the prior art and simplifies the operation process.
Patent Information
- Application Number
- CN202422131371.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-02
AI Technical Summary
During the existing screw straightening process, the positioning accuracy is low, the operation is troublesome, and the calibration accuracy is affected.
A screw bending correction device is designed, using the left hydraulic tailstock and the right hydraulic tailstock positioning screw, the jack drives the top push block to heat and lift the curved apex, and adjust it in combination with the level to achieve calibration while heating.
It improves the calibration accuracy of the screw, simplifies the operation process, is convenient to position and simple to structure.
Smart Images
Figure CN223056425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bending correction device for a screw rod. Background Art
[0002] Screw rods are mostly used in plastic molding equipment, such as plastic profile extruders, injection molding machines, etc. The screw rod and the barrel are the core components of plastic molding equipment, which are the parts for heating and extruding plasticization and are the core of plastic machinery. Screw rods are widely used in machining centers, CNC machines, CNC lathes, injection molding machines, wire cutting machines, grinders, milling machines, and so on. When in use, screw rods have high requirements for straightness. Therefore, during processing, the screw rods need to be straightened. In the existing straightening process, usually, both ends of the screw rod are placed on the base, and the bending vertex in the middle of the screw rod faces upward. Then, after pressing down with a pressing block, it is corrected. When positioning the screw rod, it is necessary to ensure that the bending vertex is placed upward. Due to the influence of the self-weight of the screw rod, in the free state, the bending vertex is downward. It is necessary for manual judgment of the position and adjustment, which is troublesome to operate and has low positioning accuracy, affecting the subsequent correction accuracy. Content of the Utility Model
[0003] In view of the deficiencies in the above problems, the utility model provides a bending correction device for a screw rod.
[0004] To achieve the above object, the utility model provides a bending correction device for a screw rod, including a workbench. On the workbench, a left hydraulic tailstock and a right hydraulic tailstock are provided corresponding to each other left and right for positioning the screw rod. In the middle of the workbench, a jack is slidably arranged along the horizontal direction. The end of the piston rod of the jack is provided with a pushing block. Above the pushing block, there is a heating plate. The upper part of the heating plate is connected to an electric heating device, and the electric heating device is installed at the bottom of the lifting seat. A spirit level is also arranged on the workbench.
[0005] As a further improvement of the utility model, the lower part of the left hydraulic tailstock is fixed to the workbench, and the right hydraulic tailstock forms a sliding fit with the workbench through a guide rail. On the opposite sides of the left hydraulic tailstock and the right hydraulic tailstock, a left center point and a right center point are respectively provided, and the central axes of the left center point and the right center point coincide.
[0006] As a further improvement of the utility model, the jack is installed on a sliding seat. The lower part of the sliding seat is slidably connected to the guide rail. The left side of the sliding seat is connected to a cylinder, and the cylinder is installed on the workbench.
[0007] As a further improvement of the utility model, an arc-shaped groove is machined on the upper part of the pushing block, and the radius of the arc-shaped groove is not less than the radius of the screw rod.
[0008] As a further improvement of the utility model, an arc-shaped groove is machined on the upper part of the pushing block, and the radius of the arc-shaped groove is greater than the radius of the screw rod.
[0009] As a further improvement of the present utility model, the spirit level is installed on the vertical rod, and the height position of the spirit level on the vertical rod is adjustable. The lower part of the vertical rod is fixed to the base, and the base is placed on the workbench.
[0010] As a further improvement of the present utility model, the jack is connected to the electric oil pump station through an oil pipe.
[0011] The beneficial effects of the present utility model are as follows:
[0012] When the screw rod is positioned in this device, the bending vertex is downward, which is convenient for positioning. When correcting, the method of heating while jacking is adopted, and the bending correction of the screw rod can be completed with a relatively small jacking force. The overall structure is simple, easy to operate, and the correction accuracy is high. Description of the Drawings
[0013] Figure 1 It is the front view of a screw rod bending correction device of the present utility model;
[0014] Figure 2 It is the top view of a screw rod bending correction device of the present utility model;
[0015] Figure 3 It is Figure 1 the view from direction A in
[0016] Figure 4 It is the side view of the pushing block 6;
[0017] Figure 5 It is the working schematic diagram of a screw rod bending correction device of the present utility model.
[0018] In the figure: 1, workbench; 2, left hydraulic tailstock; 21, left center; 3, cylinder; 4, slide; 5, jack; 6, pushing block; 61, arc-shaped groove; 7, electric oil pump station; 71, oil pipe; 8, spirit level; 81, vertical rod; 82, base; 9, guide rail; 10, right hydraulic tailstock; 101, right center; 11, heating plate; 111, arched groove; 12, electric heating device; 13, lifting seat. Detailed Description of the Preferred Embodiment
[0019] As Figure 1 , Figure 2As shown in the figure, a bending correction device for a screw according to the present utility model includes a workbench 1. On the workbench 1, a left hydraulic tailstock 2 and a right hydraulic tailstock 10 are provided corresponding to each other left and right for positioning the screw. The bending vertex of the screw is arranged downward. The lower part of the left hydraulic tailstock 2 is fixed to the workbench 1, and the right hydraulic tailstock 10 forms a sliding fit with the workbench 1 through a guide rail 9. On the opposite sides of the left hydraulic tailstock 2 and the right hydraulic tailstock 10, a left center point 21 and a right center point 101 are respectively provided. The central axes of the left center point 21 and the right center point 101 coincide. In the middle of the workbench 1, a jack 5 is slidably arranged in the horizontal direction. The jack 5 is installed on a slide base 4. The lower part of the slide base 4 is slidably connected to the guide rail 9. The left side of the slide base 4 is connected to a cylinder 3. The cylinder 3 is installed on the workbench 1. The jack 5 is connected to an electric pump station 7 through an oil pipe 71. The end of the piston rod of the jack 5 is provided with a pushing block 6. An arc-shaped groove 61 (see Figure 4 ) is machined on the upper part of the pushing block 6. The radius of the arc-shaped groove 61 is larger than the radius of the screw. Above the pushing block 6, there is a heating plate 11. An arched groove 111 (see Figure 3 ) is formed on the lower part of the heating plate 11. The size of the arched groove 111 is larger than the outer dimension of the screw. The upper part of the heating plate 11 is connected to an electric heating device 12. The electric heating device 12 is installed at the bottom of a lifting seat 13. A level 8 is also provided on the workbench 1. The level 8 is installed on a vertical rod 81. The height position of the level 8 on the vertical rod 81 is adjustable. The lower part of the vertical rod 81 is fixed to a base 82. The base 82 is placed on the workbench 1.
[0020] In this device, when positioning the screw, the bending vertex is downward, which is convenient for positioning. When correcting, the method of heating and jacking at the same time is adopted, and the bending correction of the screw can be completed with a relatively small jacking force. The overall structure is simple, easy to operate, and the correction accuracy is high.
[0021] When specifically used, for the convenience of understanding the present utility model, it is described in combination with the attached drawings:
[0022] During operation, a crane is used to lift the bent screw rod between the left hydraulic tailstock and the right hydraulic tailstock. Under the action of the self-gravity of the screw rod, the bending vertex of the screw rod freely faces downward. Then, the left center point and the right center point are used to tightly position both ends of the screw rod. The air cylinder pushes the sliding seat to slide along the direction of the guide rail, so that the jack moves to directly below the bending vertex of the screw rod. The horizontal position of the lifting seat is synchronously adjusted to make the heating plate located directly above the bending vertex of the screw rod. The placement position of the level is adjusted according to the position of the screw rod. The level is moved to the middle of the screw rod and adjusted to the specified height along the vertical rod (according to the initial bending amount of the screw rod and the memory characteristics of the screw rod material, considering the springback amount after pressing and bending, calculate the bending amount that needs to be applied to the screw rod, so as to determine the height of the level). The entire lifting seat drives the entire electric heating device to move downward. The arched groove at the lower part of the heating plate surrounds the outer circumference of the screw rod, but does not contact the screw rod. After heating to a certain temperature, the piston rod of the jack drives the pushing block to rise, and the pushing block forms an upward jacking force on the bending vertex. Since the screw rod near the bending vertex is in a high-temperature state after heating, only a small force is required to jack up the bending vertex until the middle of the screw rod bends upward to the measurement range of the level. Maintain the jacking state for a certain period of time, then the pushing block moves downward to reset, and the lifting seat moves upward to reset. The screw rod rebounds through its own memory, so that the screw rod ensures a certain straightness. It can be detected again with a height gauge or a level. Finally, the screw rod can be removed.
[0023] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A bending correction device for a screw, characterized in that: It includes a workbench (1), on which a left hydraulic tailstock (2) and a right hydraulic tailstock (10) are provided corresponding to each other left and right for positioning the screw rod. A jack (5) is slidably provided in the middle of the workbench (1) in the horizontal direction. A push block (6) is provided at the end of the piston rod of the jack (5). A heating plate (11) is provided above the push block (6). An electric heating device (12) is connected to the upper part of the heating plate (11). The electric heating device (12) is installed at the bottom of the lifting seat (13). A spirit level (8) is also provided on the workbench (1).
2. The bending correction device for a screw according to claim 1, wherein: The lower part of the left hydraulic tailstock (2) is fixed to the workbench (1). The right hydraulic tailstock (10) is slidably mated with the workbench (1) through a guide rail (9). Left and right centers (21) and (101) are respectively provided on the facing sides of the left hydraulic tailstock (2) and the right hydraulic tailstock (10). The central axes of the left center (21) and the right center (101) coincide.
3. The bending correction device for a screw according to claim 2, characterized in that: The jack (5) is installed on a slide seat (4). The lower part of the slide seat (4) is slidably connected to the guide rail (9). The left side of the slide seat (4) is connected to a cylinder (3). The cylinder (3) is installed on the workbench (1).
4. A bending correction device for a screw according to claim 1, characterized in that: An arc-shaped groove (61) is machined on the upper part of the push block (6). The radius of the arc-shaped groove (61) is larger than the radius of the screw rod.
5. The bending correction device for a screw according to claim 1, characterized in that: An arched groove (111) is formed on the lower part of the heating plate (11). The size of the arched groove (111) is larger than the outer dimension of the screw rod.
6. A bending correction device for a screw according to claim 1, characterized in that: The spirit level (8) is installed on a vertical rod (81). The height position of the spirit level (8) on the vertical rod (81) is adjustable. The lower part of the vertical rod (81) is fixed to a base (82). The base (82) is placed on the workbench (1).
7. A bending correction device for a screw according to claim 1, characterized in that: The jack (5) is connected to an electric pump station (7) through an oil pipe (71).