Wire correction device for wire forming machine

By using a servo motor-driven calibration device, combined with an adjustment gear and guide rod design, the shortcomings of traditional wire calibration devices in terms of accuracy and adaptability are solved, achieving efficient and stable wire calibration results.

CN223902823UActive Publication Date: 2026-02-13SHENZHEN HAOLIAN WIRE TECH CO LTD
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Patent Information

Application Number
CN202520452491.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-14
Publication Date
2026-02-13
Estimated Expiration
2035-03-14

AI Technical Summary

Technical Problem

Traditional wire straightening devices are insufficient in terms of accuracy and adaptability, making it difficult to achieve high-precision straightening and rapid adjustment. Furthermore, the straightening wheels are prone to wear, which affects production efficiency.

Method used

The calibration device, driven by a servo motor, achieves automated adjustment and uniform pressure application of the calibration wheel through the coordination of gears and threaded rods. Combined with the design of guide rods and guide grooves, it ensures the stability and accuracy of the calibration process.

Benefits of technology

It achieves high-precision wire alignment, adapts to rapid adjustment of wires of different diameters, reduces production preparation time, improves product quality and production efficiency, and reduces the frequency of equipment wear.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of wire rod correction, and discloses a wire rod correction device for a wire rod forming machine, which comprises a wire rod body and a correction frame, a plurality of equidistantly distributed bottom correction pieces are installed on the back side in the correction frame through threads, and correction wheels in the correction frame provide preliminary support for wire rods. A guide rod and a threaded rod are fixed to the top end of the top correcting part and slidably mounted in the correcting frame, a correcting wheel is arranged at the bottom of the top correcting part as well, the correcting wheel and the correcting wheel of the bottom correcting part are symmetrically distributed, and the wire rod body is encircled and corrected, and an adjusting gear in the center of the top end of the correcting frame is matched with a threaded shaft sleeve clamped in the adjusting gear. The adjusting gear is driven by the driving gear to rotate, so that the top correcting piece accurately moves up and down along the guide rod, the distance between the correcting wheels can be rapidly adjusted, in the correcting process, the upper correcting wheel and the lower correcting wheel evenly apply pressure to a wire, and in cooperation with sliding fit of a guide block on the back face of the top correcting piece and a T-shaped guide groove of a guide back plate, correcting stability is ensured.
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Description

TECHNICAL FIELD

[0001] The utility model relates to wire rod correction technical field, concretely to a wire rod correction device for wire rod forming machine. BACKGROUND

[0002] Wire rod forming machine is a kind of mechanical equipment for processing metal wire rod and other materials into various specific shape and size products, usually by feeding mechanism, forming mechanism, cutting mechanism and other parts, when working, feeding mechanism transports wire rod to forming mechanism according to set speed and length, forming mechanism carries out bending, twisting, stretching and other operations to wire rod through die, roller and other components, so that it reaches predetermined shape, finally cutting mechanism cuts wire rod according to requirements after forming, and it is widely used in electronic, electrical, automobile, hardware and other industries, and can produce various wire rod products such as electronic component pin, automobile seat framework, hardware ornament and the like.

[0003] Traditional wire rod correction device has many deficiencies, in terms of precision, its correction wheel layout and adjustment mode are single, it is difficult to uniformly press wire rod, it cannot meet high-precision requirement, resulting in large size deviation of subsequent forming products, high scrap rate, in terms of adaptability, if it is required to adapt to wire rods of different diameters, manual adjustment is usually required, and adjustment accuracy is difficult to guarantee, far less than new device 10 seconds can not guarantee accurate adjustment interval, furthermore, correction wheel of traditional device is easy to wear, and it needs to be frequently replaced, which greatly affects production progress, and it is in sharp contrast with stable and efficient new device, therefore, we provide a wire rod correction device for wire rod forming machine. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of prior art, the utility model provides a wire rod correction device for wire rod forming machine, which solves the above problems.

[0005] To realize the above-mentioned purposes, the utility model provides the following technical scheme: a wire rod correction device for wire rod forming machine, including wire rod body and correction frame, the inside back of correction frame is equipped with a plurality of equidistantly distributed bottom correction members, the inside of bottom correction member is equipped with correction wheel, the top of top correction member is fixed with mutually symmetrical guide rod, the two guide rods are fixed with threaded rod, top correction member is slidingly installed in the inside of correction frame, wherein guide rod and threaded rod respectively penetrate the inside top end of correction frame, the inside bottom end of top correction member is equipped with correction wheel, wherein the inside correction wheel of bottom correction member and the inside correction wheel of top correction member are mutually symmetrical distribution, wire rod body is inserted between the two correction wheels, adjustment gear is rotatably installed at the top center of correction frame, the inside of adjustment gear is clamped with threaded shaft sleeve, and threaded shaft sleeve is threadedly matched with threaded rod, servo motor is installed on the back of correction frame, the top end of output shaft of servo motor is fixed with driving gear, and driving gear is meshingly matched with adjustment gear.

[0006] Preferably, the bottom of the correction frame is fixed with a rectangular support plate, the two sides of the bottom of the support plate are fixed with symmetric support columns, the front end face of the correction frame and the top of the corresponding support plate are provided with mounting slots, the mounting slots are matched with transparent protective covers through clamping, and the two ends of the correction frame are respectively provided with threading holes.

[0007] Preferably, a plurality of groups of screw holes one are formed on the inner back face of the correction frame, a plurality of screw holes two are formed on the bottom correction part, the bottom correction part is fixed on the inner back face of the correction frame by using bolts corresponding to the screw holes two and the screw holes one in sequence, the front end face of the bottom correction part is fixed with a mounting part, and the correction wheel is rotatably mounted in the inner part of the mounting part through bolts.

[0008] Preferably, a plurality of symmetric guide back plates are fixed on the inner face of the correction frame, T-shaped guide grooves are formed in the inner part of the guide back plates, a plurality of symmetric T-shaped guide blocks are fixed on the back face of the top correction part, the guide blocks are slidably matched with the guide grooves, a plurality of equidistant connecting parts are fixed on the bottom of the top correction part, and correction wheels are rotatably mounted in the inner part of the connecting parts through bolts.

[0009] Preferably, symmetric guide rods are fixed on the top end of the top correction part, a threaded rod is fixed between the two guide rods, a plurality of guide holes are formed in the top of the correction frame, and the guide rods and the threaded rod are slidably matched with the guide holes, respectively.

[0010] Preferably, an auxiliary groove in the shape of a ring is formed at the center of the top end of the correction frame, symmetric auxiliary columns are fixed on the bottom of the adjusting gear, the auxiliary columns are mounted in the inner part of the auxiliary groove and make circular motion in the inner part of the auxiliary groove, a threaded sleeve is clamped in the inner part of the adjusting gear, the threaded sleeve is threadedly matched with the threaded rod, a platform is fixed on the back face of the correction frame, a servo motor is mounted on the platform, a driving gear is fixedly connected to the output shaft of the servo motor, and the driving gear is meshingly matched with the adjusting gear.

[0011] Compared with the prior art, the wire correction device for the wire forming machine has the following beneficial effects:

[0012] 1. The wire correction device for the wire forming machine, through the ingenious structural design, high-precision correction of the wire is realized, in the correction frame, the correction wheels of the bottom correction part and the top correction part are symmetrically distributed, when the wire body passes between the two, the correction wheels can apply pressure to the wire in all directions and uniformly by the flexible rotation, the straightness of the wire is greatly improved, and the guide block on the back of the top correction part and the T-shaped guide groove of the guide back plate are closely matched, the stability of the correction process is further ensured during the movement, the deviation of the correction wheel during the correction process is avoided, and each wire can be accurately and uniformly corrected, providing high-quality raw materials for the subsequent wire forming process, and effectively improving the quality of the final product.

[0013] 2. The wire correction device for the wire forming machine is highly adaptive and improves production efficiency, has excellent adaptive ability, and can quickly respond to the correction needs of different specifications of wires, when different diameter wires need to be corrected, only the servo motor on the back of the correction frame needs to be started, the motor output shaft drives the drive gear to rotate at high speed, the drive gear is engaged with the adjusting gear, and then drives the adjusting gear to stably rotate in the auxiliary groove, the threaded shaft sleeve inside the adjusting gear is rotated, the threaded rod drives the top correction part to move up and down along the guide rod by using the threaded cooperation, the distance between the upper and lower correction wheels is quickly adjusted, without frequent replacement of parts or complex manual adjustment like traditional devices, the production preparation time is greatly saved, and the production efficiency is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the utility model;

[0015] Figure 2 It is a structure split schematic view of the utility model;

[0016] Figure 3 It is a structure cross-sectional view of the utility model;

[0017] Figure 4 It is a correction frame structure cross-sectional view of the utility model;

[0018] Figure 5 It is a top correction part structure schematic view of the utility model;

[0019] Figure 6 It is a bottom correction part structure schematic view of the utility model;

[0020] Figure 7 It is an adjusting gear structure schematic view of the utility model.

[0021] In the figure: 1, support plate; 2, transparent protective cover; 3, wire body; 4, correction frame; 5, bottom correction piece; 6, correction wheel; 7, top correction piece; 8, guide rod; 9, threaded rod; 10, adjusting gear; 11, threaded sleeve; 12, driving gear; 13, servo motor; 14, guide back plate; 15, guide groove; 16, auxiliary groove; 17, guide hole; 18, guide block; 19, mounting piece; 20, auxiliary column. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Please refer to Figures 1-7 A wire correction device for wire forming machine, including wire body 3 and correction frame 4, the inside back of correction frame 4 is equipped with a plurality of equidistantly distributed bottom correction pieces 5, the inside of bottom correction piece 5 is equipped with correction wheel 6, the top of top correction piece 7 is fixed with mutually symmetrical guide rod 8, threaded rod 9 is fixed between two guide rods 8, top correction piece 7 is slidingly installed in the inside of correction frame 4, wherein guide rod 8 and threaded rod 9 respectively penetrate the inside top end of correction frame 4, the inside bottom end of top correction piece 7 is equipped with correction wheel 6, wherein the inside correction wheel 6 of bottom correction piece 5 and the inside correction wheel 6 of top correction piece 7 are mutually symmetrical distribution, wire body 3 is inserted between two correction wheels 6, adjusting gear 10 is rotatably installed at the top center of correction frame 4, threaded sleeve 11 is clamped in the inside of adjusting gear 10, and threaded sleeve 11 is threadedly matched with threaded rod 9, servo motor 13 is installed on the back of correction frame 4, driving gear 12 is fixed on the top end of the output shaft of servo motor 13, and driving gear 12 is meshingly matched with adjusting gear 10.

[0024] Further, the bottom of correction frame 4 is fixed with rectangular support plate, the bottom of support plate is fixed with mutually symmetrical support columns, the front end face of correction frame 4 and the top of corresponding support plate 1 are provided with mounting slot, transparent protective cover 2 is clamped and matched on mounting slot, wire holes are respectively provided at both ends of correction frame 4, the stable support correction device of the device is guaranteed, and the operation safety is convenient to observe.

[0025] Further, a plurality of screw holes one are evenly distributed on the inner back surface of the correction frame 4, a plurality of screw holes two are arranged on the bottom correction part 5, and the bottom correction part 5 is fixed to the inner back surface of the correction frame 4 by corresponding screw holes two and screw holes one in sequence by bolts. The front end surface of the bottom correction part 5 is fixed with a mounting part 19, and the correction wheel 6 is rotatably installed in the inner part of the mounting part 19 by corresponding bolts. The bottom correction part 5 can be stably fixed to the inner back surface of the correction frame 4 by corresponding bolts.

[0026] Further, a plurality of guide back plates 14 are fixed on the inner surface of the correction frame 4, a T-shaped guide groove 15 is arranged in the inner part of the guide back plate 14, a plurality of T-shaped guide blocks 18 are fixed on the back surface of the top correction part 7, the guide blocks 18 are slidably matched with the guide grooves 15, a plurality of connecting parts are fixed on the bottom of the top correction part 7, and the correction wheel 6 is rotatably installed in the inner part of the connecting part by corresponding bolts. The wire body 3 is accurately aligned and corrected, and the correction process is stable.

[0027] Further, the top end of the top correction part 7 is fixed with two symmetrical guide rods 8, a threaded rod 9 is fixed between the two guide rods 8, a plurality of guide holes 17 are arranged on the top of the correction frame 4, and the guide rods 8 and the threaded rod 9 are slidably matched with the plurality of guide holes 17 respectively. The top correction part 7 can be effectively guided to move up and down along the accurate track, and the top correction part 7 can be kept stable during adjustment, so as to provide accurate guidance for flexible adjustment of the distance between the upper and lower correction wheels 6.

[0028] Further, a ring-shaped auxiliary groove 16 is arranged at the center of the top end of the correction frame 4, two symmetrical auxiliary columns 20 are fixed on the bottom of the adjusting gear 10, the auxiliary columns 20 are installed in the inner part of the auxiliary groove 16, and the auxiliary columns 20 make circular motion in the inner part of the auxiliary groove 16. A threaded sleeve 11 is clamped in the inner part of the adjusting gear 10, the threaded sleeve 11 is threadedly matched with the threaded rod 9, a platform is fixed on the back surface of the correction frame 4, a servo motor 13 is installed on the platform, a driving gear 12 is fixedly connected to the output shaft of the servo motor 13, and the driving gear 12 is meshingly matched with the adjusting gear 10. The top correction part 7 can be accurately driven to move up and down along the guide rod 8.

[0029] Structure description:

[0030] Support plate 1: The support plate 1 is fixed at the bottom of the correction frame 4, is rectangular, and has symmetrical support columns on both sides of the bottom for supporting the correction frame 4 and ensuring the stability of the whole device, thereby providing a stable foundation for correction work.

[0031] Transparent protective cover 2: The transparent protective cover 2 is clamped on the mounting groove on the front end surface of the correction frame 4 and the top of the support plate 1, can protect the internal structure, facilitates observation of the internal wire correction condition, and does not affect operation.

[0032] Wire body 3: Wire body 3 is the object to be corrected, in the correction frame 4, between the bottom correction piece 5 and the top correction piece 7, through the correction wheel 6, the straightness is improved;

[0033] Correction frame 4: Correction frame 4 is the main structure, inside the bottom, top correction piece 7, etc., back to the servo motor 13, the front end can be equipped with transparent protective cover 2, provide working space and structure support for wire correction;

[0034] Bottom correction piece 5: Bottom correction piece 5 is fixed by bolt in the back of correction frame 4, the front end has mounting piece, correction wheel 6 is installed on it, and cooperates with top correction piece 7 to correct wire;

[0035] Correction wheel 6: Correction wheel 6 is installed in the bottom and top correction piece 7, when the wire passes through, it can rotate flexibly and press the wire in all directions to improve the straightness of the wire;

[0036] Top correction piece 7: Top correction piece 7 is slidingly installed in the correction frame 4, the back has mounting piece 1918 cooperating with guide back plate 14, and the bottom end has correction wheel 6 cooperating with bottom correction piece 5 to correct the wire;

[0037] Guide rod 8: Guide rod 8 is fixed at the top end of top correction piece 7, which is symmetrical with each other, and cooperates with threaded rod 9 to provide guide for the movement of top correction piece 7 and ensure the accuracy of the movement;

[0038] Threaded rod 9: Threaded rod 9 is located between two guide rods 8, cooperates with threaded sleeve 11, is driven by adjusting gear 10, and drives top correction piece 7 to move up and down to adjust the distance;

[0039] Adjusting gear 10: Adjusting gear 10 is rotatably installed at the top center of correction frame 4, and the bottom has auxiliary column 20 moving in auxiliary groove 16, and the inside is clamped with threaded sleeve 11, which is used for adjusting the position of top correction piece 7;

[0040] Threaded sleeve 11: Threaded sleeve 11 is clamped in the inside of adjusting gear 10, cooperates with threaded rod 9, converts the rotation of adjusting gear 10 into the linear motion of threaded rod 9, and adjusts the distance between correction wheels 6;

[0041] Drive gear 12: Drive gear 12 is fixed on the output shaft of servo motor 13, engages with adjusting gear 10, transmits the power of servo motor 13 to adjusting gear 10, and realizes automatic adjustment;

[0042] Servo motor 13: Servo motor 13 is installed on the back platform of correction frame 4, and the output shaft drives drive gear 12 to rotate after starting, which provides power for the distance adjustment of top correction piece 7;

[0043] Guide backboard 14: The guide backboard 14 is fixed on the top inside of the correction frame 4, and a T-shaped guide slot 15 is opened, which cooperates with the mounting piece 1918 on the back of the top correction piece 7 to ensure the stability of the correction process.

[0044] Guide slot 15: The guide slot 15 is T-shaped and is opened in the guide backboard 14, which cooperates with the mounting piece 1918 of the top correction piece 7 to make the top correction piece 7 move more smoothly and accurately.

[0045] Auxiliary slot 16: The auxiliary slot 16 is annular and is opened at the top center of the correction frame 4, in which the auxiliary column 20 at the bottom of the adjusting gear 10 makes circular motion to assist the stable rotation of the adjusting gear 10.

[0046] Guide hole 17: The guide hole 17 is opened at the top of the correction frame 4, and the guide rod 8 and the threaded rod 9 are respectively matched with it to slide, which assists the top correction piece 7 to move up and down to ensure the moving direction.

[0047] Mounting piece 1918: The mounting piece 1918 is T-shaped and is fixed on the back of the top correction piece 7, which cooperates with the guide slot 15 of the guide backboard 14 to limit the moving track of the top correction piece 7 and ensure the correction stability.

[0048] Mounting piece: The mounting piece is fixed on the front end face of the bottom correction piece 5, and the correction wheel 6 is installed in it by bolts to provide the installation position for the correction wheel 6 and ensure its normal work.

[0049] Auxiliary column 20: The auxiliary column 20 is fixed on the bottom of the adjusting gear 10, is symmetrical to each other, and is installed in the auxiliary slot 16 to make the adjusting gear 10 make circular motion in the auxiliary slot 16, which makes it rotate more smoothly.

[0050] Working principle: the inside back of the correction frame 4, a plurality of equidistantly distributed bottom correction pieces 5 are installed through threads, firmly rooted, the front end face of the bottom correction piece 5 is installed with the correction wheel 6 through bolt rotation, providing preliminary support for the wire, at the same time, the top correction piece 7 is flexibly sliding inside the correction frame 4, the top end of the top correction piece 7 is penetrated through the top end of the correction frame 4 together with the middle threaded rod 9, the guide rod 8 is accurately sliding in the guide hole 17, ensuring the stable movement of the top correction piece 7, while the threaded rod 9 is closely related to the subsequent adjusting mechanism, the bottom of the top correction piece 7 is also installed with the correction wheel 6, which is symmetrically distributed with the correction wheel 6 of the bottom correction piece 5, forming the surrounding tendency of the wire body 3, the wire passes between the two, and receives correction, when facing the wire with different diameters needing correction, the adjusting system of the device starts to work, the rotationally installed adjusting gear 10 at the top center of the correction frame 4 is the key node, the auxiliary column 20 at the bottom of the adjusting gear 10 is smoothly doing circular motion in the annular auxiliary groove 16, ensuring its stable rotation, the threaded shaft sleeve 11 inside the adjusting gear 10 is connected with the threaded rod 9 through threads, on the back of the correction frame 4, the servo motor 13 is installed on the platform, the driving gear 12 at the top of the output shaft of the motor is fixedly connected with the adjusting gear 10, the servo motor 13 is started, the output shaft of the motor drives the driving gear 12 to rotate at high speed, the driving gear 12 drives the rotation of the adjusting gear 10, with the rotation of the adjusting gear 10, the threaded shaft sleeve 11 connected with it rotates synchronously, since the threaded rod 9 is connected with the threaded shaft sleeve 11 through threads, and the guide rod 8 limits the movement direction of the top correction piece 7, the top correction piece 7 will move up and down along the track of the guide rod 8, realizing the accurate up and down movement, so as to flexibly adjust the distance between the upper and lower correction wheels 6, adapting to various wires, in the actual correction process, the wire body 3 is inserted from the threading hole at one end of the correction frame 4, under the protection of the transparent protective cover 2, in turn passes through the correction wheels 6 of the bottom correction piece 5 and the top correction piece 7, with the continuous conveying of the wire, the correction wheel 6 rotates flexibly by itself, applies uniform pressure to the wire, and gradually straightens the curved wire, the guide block 18 at the back of the top correction piece 7 slides in the T-shaped guide groove 15 of the guide back plate 14, further ensuring the stability of the correction process, the corrected wire is inserted from the threading hole at the other end of the correction frame 4, which is straight and meets the standard, laying a solid foundation for the subsequent wire forming process.

[0051] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A wire correction device for a wire forming machine, comprising a wire body (3) and a correction frame (4), characterized in that: The inside back of the correction frame (4) is threadedly mounted with a plurality of equidistantly distributed bottom correction members (5), the inside of the bottom correction members (5) is mounted with correction wheels (6), the top of the top correction member (7) is fixed with mutually symmetrical guide rods (8), a threaded rod (9) is fixed between the two guide rods (8), the top correction member (7) is slidingly mounted in the inside of the correction frame (4), wherein the guide rods (8) and the threaded rod (9) respectively penetrate the inside top end of the correction frame (4), the bottom end of the top correction member (7) is internally mounted with correction wheels (6), wherein the inside correction wheels (6) of the bottom correction members (5) and the inside correction wheels (6) of the top correction member (7) are mutually symmetrically distributed, a wire body (3) is inserted between the two correction wheels (6), an adjusting gear (10) is rotatably mounted at the center of the top end of the correction frame (4), a threaded shaft sleeve (11) is clamped in the inside of the adjusting gear (10), and the threaded shaft sleeve (11) is threadedly matched with the threaded rod (9), a servo motor (13) is mounted on the back of the correction frame (4), a drive gear (12) is fixed at the top end of the output shaft of the servo motor (13), and the drive gear (12) is meshingly matched with the adjusting gear (10).

2. The wire correction device for a wire forming machine according to claim 1, characterized in that: The bottom of the correction frame (4) is fixed with a rectangular support plate, the two sides of the bottom of the support plate are fixed with mutually symmetrical support columns, the front end face of the correction frame (4) and the top of the corresponding support plate (1) are provided with mounting grooves, the mounting grooves are clamped and matched with transparent protective covers (2), and the two ends of the correction frame (4) are respectively provided with wire penetrating holes.

3. The wire correction device for a wire forming machine according to claim 1, characterized in that: A plurality of equidistantly distributed threaded holes two are formed in the bottom correction members (5), and the bottom correction members (5) are fixed to the inside back of the correction frame (4) by means of bolts corresponding to the threaded holes two and the threaded holes one in sequence, the front end face of the bottom correction members (5) is fixed with mounting members (19), and the correction wheels (6) are rotatably mounted in the inside of the mounting members (19) in cooperation with the bolts.

4. The wire correcting device for a wire forming machine according to claim 1, characterized in that: A plurality of equidistantly distributed guide back plates (14) are fixed to the upper part of the inside face of the correction frame (4), the inside of the guide back plates (14) is provided with T-shaped guide grooves (15), the back of the top correction member (7) is fixed with a plurality of equidistantly distributed T-shaped guide blocks (18), the guide blocks (18) are slidingly matched with the guide grooves (15) in correspondence, and the bottom of the top correction member (7) is fixed with a plurality of equidistantly distributed connecting members, the connecting members are rotatably mounted with the correction wheels (6) in the inside in cooperation with the bolts.

5. The wire correction device for a wire forming machine according to claim 4, characterized in that: The top end of the top correction member (7) is fixed with mutually symmetrical guide rods (8), a threaded rod (9) is fixed between the two guide rods (8), a plurality of guide holes (17) are formed in the top of the correction frame (4), and the guide rods (8) and the threaded rod (9) are slidingly matched with the plurality of guide holes (17) in correspondence.

6. The wire correction device for a wire forming machine according to claim 5, characterized in that: The top center of the correction frame (4) is provided with an annular auxiliary groove (16), the bottom of the adjusting gear (10) is fixed with mutually symmetrical auxiliary columns (20), the auxiliary columns (20) are installed in the inside of the auxiliary groove (16), and the auxiliary columns (20) make circular motion in the inside of the auxiliary groove (16), the inside of the adjusting gear (10) is clamped with a threaded shaft sleeve (11), the threaded shaft sleeve (11) is in threaded cooperation with a threaded rod (9), the back of the correction frame (4) is fixed with a platform, the platform is installed with a servo motor (13), the output shaft of the servo motor (13) is fixedly connected with a driving gear (12), and the driving gear (12) is in meshing cooperation with the adjusting gear (10).