CN216780153U

CN216780153U - Sinusoidal straightening device for titanium alloy coiled wire

Info

Publication number: CN216780153U
Application number: CN202220482201.XU
Authority: CN
Inventors: 冯奇; 乔琳; 樊佳盟
Original assignee: Xi'an Cohen Titanium New Material Technology Co ltd
Current assignee: Xi'an Cohen Titanium New Material Technology Co ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-06-21
Anticipated expiration: 2032-03-08

Abstract

A sine straightening device for a titanium alloy coiled round wire rod comprises a rotary barrel; the motor drives the rotating barrel to rotate by taking the central shaft as a rotating shaft through a transmission belt; at least three assembly parts are arranged on the cylindrical inner wall of the rotary barrel; the assembly part comprises a screw-down rod movably connected on the inner wall of the rotary barrel, the bottom end of the screw-down rod is fixedly connected with a bearing, and a straightening die is arranged on the inner lining of the bearing in an interference fit manner; the utility model greatly improves the friction condition between the wire rod and the straightening die through the circular motion of the straightening die in the bearing, transfers the friction force to the rolling process of the bearing ball, effectively protects the surface of the wire rod, and eliminates the surface torsion crack and twist-off condition generated in the wire rod straightening process.

Description

Sinusoidal straightening device for titanium alloy coiled wire

Technical Field

The utility model relates to the technical field of wire straightening, in particular to a sine straightening device for titanium alloy coiled round wires.

Background

In recent years, titanium alloy materials are widely used in biomedical fields such as surgical implantation and the like, or are directly or secondarily processed into aerospace fasteners and matched products thereof due to excellent comprehensive performance and good biocompatibility, so that the materials are required to have high-level surface finish, straightness, fixed length and other technical requirements, and are generally required to be in a straight strip shape in a delivery state. The wire with small and medium specifications (phi is less than or equal to 7mm) is generally made from blanks with phi of 8mm to 10mm by a turntable drawing mode, and the wire is generally in a disc shape after being drawn. And after drawing, converting the disc-shaped wire into a straight strip-shaped wire blank by adopting a sine straightening method.

The straightening modes of the conventional titanium alloy wire material comprise roller straightening, tension continuous electric heating straightening, sine straightening and the like. The roller straightening equipment can be generally used for straightening bars with the diameter of more than 7mm, and the straightening efficiency is low in the continuous electric heating straightening process of the tension.

The existing sine straightening mode is a straightening processing mode with large press-in amount and high-speed torsion, and because straightening dies of a traditional sine straightening machine are welded on a screw rod in a fixed mode, the press-in amount is adjusted. High-speed relative rotation is carried out between wire rod of rolling and the straightening mould with the sliding friction mode to reach the straightening effect, but this kind of motion mode can lead to the wire rod surface to produce serious torsion crack in the course of working, and twist off even, influences product quality, and the yield is lower, influences the market competition of enterprise.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a titanium alloy coiled wire sine straightening device and an assembly part processing method thereof, which can effectively reduce the friction force between a straightening die and a coiled wire and eliminate the torsion cracks and even twisting-off damage of the coiled wire in the straightening process caused by sliding friction between the coiled wire and the straightening die.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the sine straightening device for the titanium alloy coiled wire rod comprises a coiled wire rod, a pay-off reel for storing the coiled wire rod to be straightened and a material receiving trough for storing the straightened coiled wire rod; a rotary barrel is arranged between the pay-off reel and the material receiving groove; the rotary barrel is of a cylindrical structure, through holes are formed in two ends of the rotary barrel and are used as an inlet and an outlet of a coiled wire, a motor and a transmission belt are arranged at one end of the rotary barrel, and the motor drives the rotary barrel to rotate by taking a central shaft as a rotating shaft through the transmission belt; an inlet pinch roll and an outlet pinch roll for conveying the coiled wire rod are respectively arranged at the inlet and the outlet at the two ends of the rotary barrel; at least three assembly parts are arranged on the cylindrical inner wall of the rotary barrel; the assembly part comprises a screw-down rod movably connected on the inner wall of the rotary barrel, the bottom end of the screw-down rod is fixedly connected with a bearing, and a straightening die is arranged on the inner lining of the bearing in an interference fit manner; the wire rod sequentially passes through the inlet pinch roll, the inlet of the rotary barrel, the inner hole of the straightening die, the outlet of the rotary barrel and the outlet pinch roll and finally enters the material receiving groove.

In the titanium alloy wire rod sine straightening device, the front end of the receiving trough is also provided with a cold shearing machine for shearing the straightened wire rod into required size.

The beneficial effects produced by adopting the utility model are as follows:

the utility model greatly improves the friction condition between the wire rod and the straightening die through the circular motion of the straightening die in the bearing, transfers the friction force to the rolling process of the bearing ball, effectively protects the surface of the wire rod, and eliminates the surface torsion crack and twist-off condition generated in the wire rod straightening process.

Drawings

Fig. 1 is a schematic view of the structural principle of the present invention.

Fig. 2 is a schematic structural diagram of the assembly of the present invention.

In the figure: 1-a pay-off reel; 2-coiling the round wire rod; 3-inlet pinch roll; 4-outlet pinch rolls; 501, a motor; 502-a drive belt; 6-barrel rotation; 7-an assembly; 701-pressing down a screw; 702-a bearing; 703-straightening the mould; 8-a cold shearing machine; 9-material receiving groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.

Referring to FIG. 1, the utility model aims to provide a straightening device of a titanium alloy wire sine straightener, which solves the quality problems of cracks, twisting and the like generated in the method. The titanium alloy coiled wire material sine straightening device comprises a coiled wire material 2, a pay-off reel 1 for storing the coiled wire material 2 to be straightened and a material receiving groove 9 for storing the straightened coiled wire material 2; a rotary barrel 6 is arranged between the pay-off reel 1 and the material receiving groove 9; the rotary barrel 6 is of a cylindrical structure, through holes are formed in two ends of the rotary barrel 6 and are used as an inlet and an outlet of a coiled wire, a motor 501 and a transmission belt 502 are arranged at one end of the rotary barrel 6, and the motor 501 drives the rotary barrel 6 to rotate by taking a central shaft as a rotating shaft through the transmission belt 502; an inlet pinch roll 3 and an outlet pinch roll 4 for conveying the coiled round wire are respectively arranged at the inlet and the outlet at the two ends of the rotary barrel 6; at least three assembly parts 7 are arranged on the cylindrical inner wall of the rotary barrel 6; the assembly part 7 comprises a screw-down 701 movably connected on the inner wall of the rotary barrel 6, the bottom end of the screw-down 701 is fixedly connected with a bearing 702, and a straightening die 703 is arranged on the inner liner of the bearing 702 in an interference fit manner; the wire rod 2 sequentially passes through an inlet pinch roll 3, an inlet of a rotary barrel 6, an inner hole of a straightening die 703, an outlet of the rotary barrel 6 and an outlet pinch roll 4, and finally enters a material receiving groove 9; the front end of the material receiving groove 9 is also provided with a cold shearing machine 8 for shearing the straightened wire rod 2 into required size.

The utility model transfers the sliding friction mode between the existing straightening die 703 and the coiled wire 2 to the bearing 702, namely, the single rotation mode is improved into a comprehensive mode of rotation and revolution, thereby effectively reducing the friction force between the straightening die 703 and the coiled wire 2.

The method can be carried out by modifying the existing sine straightener, firstly, the original straightening die of the equipment is separated from the screw-down rod, and after the straightening die and the screw-down rod are integrally disassembled, the straightening die and the screw-down rod are separated by adopting cutting modes such as linear cutting and the like; secondly, the straightening die is installed in the customized bearing inner lining with a fit clearance of +0.02mm, and finally, the bearing with the straightening die assembled is welded on the screw-down rod for use.

The improved mode of the utility model eliminates the sliding friction phenomenon between the wire and the straightening die and transfers the sliding friction phenomenon into the rolling mode of the bearing ball. Namely, the rotation is changed into the revolution and residual rotation, thereby solving the phenomena of torsion crack and twist-off on the surface of the wire rod.

The utility model relates to a straightening device of a titanium alloy wire sine straightener, which comprises an assembly part 7, wherein the assembly part 7 consists of a straightening die 703, a bearing 702 and a pressing screw 701. The assembly part 7 specifically meets the straightening process requirement of the titanium alloy wire through the following steps:

step 1: and measuring the outer diameter of the straightening die 703, and selecting a bearing 702 with the inner diameter being 2mm smaller than the outer diameter of the straightening die 703, wherein the bearing can adopt a standard bearing, can also adopt a customized bearing, and preferably adopts the standard bearing.

Step 2: according to the inner diameter of the selected standard bearing 702, the outer surface of the straightening die 703 is processed. The outer circle surface of the straightening die 703 is ground by a cylindrical grinding machine and a grinding wheel with 80-mesh K-level hardness, the ground size is plus 0.05mm of the positive deviation of the inner diameter size of the standard bearing 702, the surface is polished by a polishing machine, the requirement that the finish Ra is less than or equal to 0.8 mu m is met, the outer diameter size of the straightening die 703 is plus 0.02mm of the positive deviation of the inner diameter size of the standard bearing 702, and the precision reaches 0.01 mm. And finally, the straightening die 703 is in interference fit with the bearing 702.

And 3, step 3: assembling the straightening die 703 and the bearing 702: by utilizing the principle that different materials have different coefficients of expansion with heat and contraction with cold, the method of oil boiling (common industrial engine oil is heated to 70 ℃ to ensure that parts are immediately taken out after being boiled for 60min and are quickly installed) is adopted, when the assembly part is cooled to normal temperature, the assembly part straightening die part supported in the air is pressed by a press machine with the pressure of about 1000N, and whether the assembly part 4 is firmly matched is checked.

And 4, step 4: assembly 4 is re-welded to hold-down screw 701 and installed in situ on the sine straightener.

And 5: and starting the machine for debugging, wherein the assembly part 7 replaces a direct contact mode of the straightening die 703 and the coiled wire 2, and the sliding friction condition formed by the original high-speed torsion of the coiled wire 2 and the straightening die 703 is changed. The friction condition is eliminated through the circular motion of the straightening die 703 in the bearing 702, the friction force is transferred to the rolling process of the bearing ball, the surface of the wire is effectively protected, and the surface torsion crack and twist-off condition generated in the wire straightening process are eliminated.

Namely, the working principle of the mode that the movement mode between the wire rod and the straightening die 703 is changed from rotation to rotation plus revolution is as follows: after the wire rod 2 enters the straightening die 703, the straightening die 703 and the rotary barrel 6 are fixedly connected into a whole, and the rotary barrel 6 is driven by the motor 501 through the transmission belt 502 to rotate at a high speed; when the assembly parts 7 are adjusted, the positions of the straightening dies 7 are adjusted according to a sine curve, the wire rods 2 to be coiled sequentially pass through the inner holes of the straightening dies 703, and meanwhile, one ends of the wire rods 2 to be coiled are relatively fixed at the inlet of the rotary barrel 6, and the other ends of the wire rods 2 to be coiled are relatively clamped at the outlet. When the rotary barrel 6 rotates at a high speed, the wire rod 2 is passively twisted by the straightening die 703 until being twisted and then drawn out by the outlet pinch roll 4, and after being drawn out to a limit length, the wire rod is cut into a finished product with a required size by the action of the cold shearing machine 8 after receiving a limit signal, and the finished product is conveyed to the material receiving groove for storage.

The foregoing is a more detailed description of the utility model that is presented in connection with specific embodiments, which are not intended to limit the utility model to the particular embodiments described herein. For a person skilled in the art to which the utility model pertains, several equivalent alternatives or obvious modifications, all of which have the same properties or uses, without departing from the inventive concept, should be considered as falling within the scope of the patent protection of the utility model, as determined by the claims filed.

Claims

1. A sine straightening device for titanium alloy coiled wire rods comprises coiled wire rods (2), a pay-off reel (1) for storing the coiled wire rods (2) to be straightened and a material receiving groove (9) for storing the straightened coiled wire rods (2); a rotary barrel (6) is arranged between the pay-off reel (1) and the material receiving groove (9); the wire rod coiling machine is characterized in that the rotary barrel (6) is of a cylindrical structure, through holes are formed in two ends of the rotary barrel to serve as an inlet and an outlet of a coiled wire rod, a motor (501) and a transmission belt (502) are arranged at one end of the rotary barrel (6), and the motor (501) drives the rotary barrel (6) to rotate by taking a central shaft as a rotating shaft through the transmission belt (502); an inlet pinch roll (3) and an outlet pinch roll (4) for conveying the coiled wire are respectively arranged at the inlet and the outlet at the two ends of the rotary barrel (6); at least three assembly parts (7) are arranged on the cylindrical inner wall of the rotary barrel (6); the assembly part (7) comprises a screw-down rod (701) movably connected to the inner wall of the rotary barrel (6), the bottom end of the screw-down rod (701) is fixedly connected with a bearing (702), and a straightening die (703) is arranged in the bearing (702) in an interference fit manner; the wire rod (2) sequentially passes through the inlet pinch roll (3), the inlet of the rotary barrel (6), the inner hole of the straightening die (703), the outlet of the rotary barrel (6) and the outlet pinch roll (4), and finally enters the material receiving groove (9).

2. The sine straightener for the titanium alloy coiled round wire rod according to claim 1, wherein: the front end of the material receiving groove (9) is also provided with a cold shearing machine (8) for cutting the straightened wire rod (2) into required sizes.