Three-roller guide and guard with self-adapting groove adjustment

Abstract

This application discloses a three-roll guide with adaptive die shape adjustment, relating to the field of rolling mill technology. It includes a housing, support arm assemblies, and an adaptive adjustment component. At least three support arm assemblies are circumferentially arrayed on the housing, and guide wheels on the three support arms mutually enclose each other to form a forming hole for the rolled bar. The adaptive adjustment component corresponds one-to-one with each support arm assembly, maintaining elastic contact with the support arm assembly to adjust the rotation of the support arm assembly on the housing, thereby changing the size and shape of the forming hole. This application enables the support arm assembly to automatically adjust the size and shape of the forming hole formed by the guide wheels according to the diameter of the metal sheet. The die shape formed by the guide wheels is passively adjusted according to the incoming material, thus achieving adaptive die shape adjustment and ultimately realizing accurate clamping and torsion-free rolling of the workpiece.

Description

Technical Field

[0001] This application relates to the field of rolling mill technology, specifically to a three-roll guide with adaptive die shape adjustment. Background Technology

[0002] Bar stock is an indispensable raw material in industrial processing, and obtaining high-quality, high-precision bar stock is an inevitable development trend. Furthermore, with the emergence and development of three-roll mills, the precision and quality of bars produced using three-roll mills have been significantly improved.

[0003] Three-roll rolling achieves rounding by alternating forward and reverse stands. For smaller bars and wire rods, the key to preventing the rolled parts from twisting is to support them with rolling guides before each stand: the three guide wheels of the rolling guides are arranged in the same way as the three rolls of the previous stand. The guide wheels clamp the rolled parts to achieve twist-free rolling.

[0004] However, for rolling larger bars, there are generally two structures before a three-roll mill. One is a direct guide, whose function is to allow the rolled piece to smoothly enter the mill rolls. This structure is simple and can withstand greater impact, but the effect of achieving torsion-free rolling solely through the mill is not very significant. The other structure also uses rolling guides. Although it can achieve better torsion-free rolling, it also has significant drawbacks. In multi-specification rolling operations, the guide roller groove size needs to be frequently adjusted or the guide rollers need to be replaced, which reduces production efficiency and places higher demands on the operator.

[0005] Therefore, for the rolling of large bars, existing technologies each have their advantages and disadvantages, and none have achieved a relatively ideal rolling process. Utility Model Content

[0006] The main objective of this application is to provide a three-roller guide with adaptive aperture adjustment, which aims to solve the above-mentioned technical problems.

[0007] The technical solution adopted in this application is as follows:

[0008] A three-roll guide with adaptive aperture adjustment, comprising:

[0009] case;

[0010] At least three support arm assemblies are arranged in a circumferential array on the housing, and the guide wheels on the three support arms surround each other to form a forming hole for the rolled bar.

[0011] At least three adaptive adjustment components are provided, each corresponding to one of the support arm components. The adaptive adjustment components are used to maintain elastic contact with the support arm components and adjust the rotation of the support arm components on the housing to change the size and shape of the forming hole.

[0012] Optionally, the support arm assembly includes a support arm and a guide wheel. The support arm includes a triangularly distributed protruding end, a first wing end, and a second wing end. The protruding end is rotatably connected to the housing via a spindle. The first wing end is provided with a first ball cup, and the guide wheel is rotatably disposed on the second wing end.

[0013] Optionally, the guide wheel is connected to the second wing end via an axle and a bearing.

[0014] Optionally, a tension spring is connected between the support arm and the housing.

[0015] Optionally, the adaptive adjustment component includes:

[0016] A lead screw sleeve is disposed inside the housing and threadedly fitted to the housing;

[0017] A support rod is slidably disposed within the lead screw sleeve, and an installation cavity is reserved between the support rod and the lead screw sleeve. A second ball cup is provided at one end of the support rod.

[0018] A disc spring is disposed in the mounting cavity, and its two ends are respectively in contact with the support rod and the lead screw sleeve;

[0019] A double-sided ball-head push rod, one end of which is hinged to the spherical surface of the first ball cup, and the other end of which is hinged to the spherical surface of the second ball cup.

[0020] Optionally, the end of the support rod away from the second ball cup is fitted into the lead screw sleeve via a preload.

[0021] Optionally, the preload includes a bushing and a nut, the bushing and the nut being assembled on the support rod, with the nut located outside the bushing.

[0022] Optionally, the inner wall of the lead screw sleeve is provided with a first shoulder, the outer wall of the support rod is provided with a second shoulder, one end of the disc spring abuts against the first shoulder, and the other end of the disc spring abuts against the second shoulder.

[0023] Optionally, a washer is provided between the second vest and the disc spring.

[0024] Optionally, the housing includes a detachably connected guide body and a cover.

[0025] Compared with the prior art, the beneficial effects of this application are:

[0026] The embodiments of this application propose an adaptive die-shaped adjustment three-roll guide. Through the adaptive adjustment component, the support arm assembly can automatically adjust the size and shape of the hole formed by the guide roller according to the diameter of the metal sheet. The die shape formed by the guide roller will be passively adjusted according to the incoming material, thereby realizing adaptive die shape adjustment, and thus achieving accurate clamping and torsion-free rolling of the workpiece. Attached Figure Description

[0027] Figure 1 A three-dimensional structural schematic diagram of the adaptive aperture adjustment three-roller guide provided in the embodiments of this application;

[0028] Figure 2 A schematic diagram of the planar structure of the three-roller guide with adaptive aperture adjustment provided in the embodiments of this application;

[0029] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0030] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0031] Explanation of the labels in the attached drawings:

[0032] 1-Housing, 2-Support arm assembly, 201-Support arm, 202-Guide wheel, 203-Mandrel, 204-Tension spring, 205-First ball cup, 206-Wheel axle, 207-Bearing, 3-Adaptive adjustment assembly, 301-Screw sleeve, 302-Disc spring, 303-Washer, 304-Support rod, 305-Ring bushing, 306-Nut, 307-Second ball cup, 308-Double-sided ball head push rod. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] See attached document Figures 1 to 2 As shown in the figure, this application provides a three-roller guide with adaptive die shape adjustment, which mainly consists of three parts: a housing 1, a support arm assembly 2, and an adaptive adjustment assembly 3. The support arm assembly 2 is the actuator for adjusting the die shape size. For bars with different feed materials, the adaptive adjustment assembly 3 precisely controls the opening and closing of the support arm assembly 2 to achieve adaptive die shape adjustment.

[0038] Specifically:

[0039] The housing 1 includes a guide body and a cover, which are connected by bolts and can be disassembled for easy replacement of internal parts. The support arm assembly 2 includes a support arm 201 and a guide wheel 202. The support arm 201 includes a triangularly distributed protruding end, a first wing end, and a second wing end. The protruding end is rotatably connected to the housing 1 via a spindle 203, and a tension spring 204 connects the support arm 201 and the housing 1. The first wing end is provided with a first ball joint 205, and the second wing end is fixedly provided with an axle 206. A bearing 207 is centrally mounted on the axle 206, and the guide wheel 202 is mounted on the bearing 206, thereby rotatably mounting the guide wheel 202 on the support arm 201.

[0040] like Figures 2 to 4As shown, the adaptive adjustment component 3 is the key to realizing the adaptive adjustment of the hole shape. The adaptive adjustment component 3 includes a lead screw sleeve 301, a disc spring 302, a washer 303, a support rod 304, a preload element, and a double-sided ball head push rod 308. Among them, the lead screw sleeve 301 is internally installed in the housing 1 through a threaded connection. The support rod 304 is slidably installed inside the lead screw sleeve 301, and an installation cavity is reserved between the lead screw sleeve 301 and the support rod 304. The two sides of the installation cavity are a first shoulder integrally formed on the inner wall of the lead screw sleeve 301 and a second shoulder integrally formed on the outer wall of the support rod 304. The disc spring 302 is installed in the installation cavity. One end of the disc spring 302 abuts against the first shoulder, and the other end of the disc spring 302 is a washer 303, which abuts against the second shoulder. Meanwhile, the end of the support rod 304 facing outwards from the housing 1 is installed inside the screw sleeve 301 via a pre-tightening component. The pre-tightening component includes a bushing 305 and a nut 306. Both the bushing 305 and the nut 306 are fitted onto the support rod 304, with the bushing 305 tightly against the outer end face of the first shoulder and the nut 306 tightened against the outer side of the bushing 305. Before rolling, it is important to ensure that the distance between the three sets of support arm assemblies 2 and their relative centers is consistent by adjusting the tightness of the nut 306 on the support rod 304. At the same time, adjusting the different positions of the nut 306 on the support rod 304 can control the pre-tightening force of the disc spring 302. After the disc spring 302 has the pre-tightening force, due to the different positions of the screw sleeve 301 and the housing 1 due to the threaded connection, the disc spring 302 applies an inward pulling force to the sliding support rod 304. The support rod 304 is blocked by the first shoulder through the bushing 305, thus making the support rod 304 always tend to move inwards into the housing 1.

[0041] Meanwhile, the support rod 304 expands in diameter relative to one end of the pre-tightening member to form an enlarged end, and a second ball cup 307 is provided on one side of the enlarged end. One end of the double-sided ball head push rod 308 is spherically hinged to the first ball cup 205, and the other end of the double-sided ball head push rod 308 is spherically hinged to the second ball cup 307.

[0042] As can be imagined, each support arm assembly 2 is connected to the housing 1 by a tension spring 204. Three spindles 203 on the housing 1 pass through the three sets of support arm assemblies 2, causing the support arm assemblies 2 to rotate around the spindles 203. The guide wheel 202 in the support arm assembly 1 is connected to the bearing 207 and the support arm 201 by a wheel axle 206, so the guide wheel 202 always moves in an opening and closing motion relative to the rolling center. In this way, in the free state, the support arm assembly 1 is subjected to a force in one direction by the disc spring 302 through the double-sided ball-head push rod, and the tension spring 204 on the support arm 1 then exerts a force in the opposite direction to balance it.

[0043] Based on the above, this application provides an adaptive pass shape adjustment three-roll guide. During the rolling process, when the workpiece (bar) passes through the guide, the three sets of guide rollers 202 are subjected to an outward force, which is transmitted to the support arm 201 through the bearing 207 and the wheel axle 206. Due to the limiting effect of the mandrel 203, the support arm 201 transmits the force from the double-sided ball head push rod 308 to the support rod 304, and then from the support rod 304 to the disc spring 302. Under the same initial pass shape, the guide rollers 202 will be subjected to different magnitudes of force when rolling different specifications. Due to the action of the disc spring 302, the pass shape formed by the guide rollers will be passively adjusted according to the incoming material, thereby achieving adaptive pass shape adjustment, and thus achieving accurate clamping and torsion-free rolling of the workpiece.

[0044] In summary, the adaptive adjustment component provided in this application enables the support arm assembly to automatically adjust the size and shape of the guide wheel forming hole according to the diameter of the metal sheet. The hole shape formed by the guide wheel will be passively adjusted according to the incoming material, thereby achieving adaptive adjustment of the hole shape, and thus achieving accurate clamping and torsion-free rolling of the rolled workpiece.

[0045] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A three-roller guide with adaptive aperture adjustment, characterized in that, include: case; At least three support arm assemblies are arranged in a circumferential array on the housing, and the guide wheels on the three support arms surround each other to form a forming hole for the rolled bar. At least three adaptive adjustment components are provided, each corresponding to one of the support arm components. The adaptive adjustment components are used to maintain elastic contact with the support arm components and adjust the rotation of the support arm components on the housing to change the size and shape of the forming hole.

2. The three-roller guide with adaptive aperture adjustment according to claim 1, characterized in that, The support arm assembly includes a support arm and a guide wheel. The support arm includes a triangularly distributed protruding end, a first wing end, and a second wing end. The protruding end is rotatably connected to the housing via a spindle. The first wing end is provided with a first ball cup, and the guide wheel is rotatably disposed on the second wing end.

3. The three-roller guide with adaptive aperture adjustment according to claim 2, characterized in that, The guide wheel is connected to the second wing end via an axle and a bearing.

4. The three-roller guide with adaptive aperture adjustment according to claim 2, characterized in that, A tension spring connects the support arm to the housing.

5. The three-roller guide with adaptive aperture adjustment according to claim 2, characterized in that, The adaptive adjustment component includes: A lead screw sleeve is disposed inside the housing and threadedly fitted to the housing; A support rod is slidably disposed within the lead screw sleeve, and an installation cavity is reserved between the support rod and the lead screw sleeve. A second ball cup is provided at one end of the support rod. A disc spring is disposed in the mounting cavity, and its two ends are respectively in contact with the support rod and the lead screw sleeve; A double-sided ball-head push rod, one end of which is hinged to the spherical surface of the first ball cup, and the other end of which is hinged to the spherical surface of the second ball cup.

6. The three-roller guide with adaptive aperture adjustment according to claim 5, characterized in that, The end of the support rod away from the second ball cup is fitted into the lead screw sleeve via a preload.

7. The three-roller guide with adaptive aperture adjustment according to claim 6, characterized in that, The preload includes a bushing and a nut, which are mounted on the support rod, with the nut located outside the bushing.

8. The three-roller guide with adaptive aperture adjustment according to claim 5, characterized in that, The inner wall of the lead screw sleeve is provided with a first shoulder, the outer wall of the support rod is provided with a second shoulder, one end of the disc spring abuts against the first shoulder, and the other end of the disc spring abuts against the second shoulder.

9. The three-roller guide with adaptive aperture adjustment according to claim 8, characterized in that, A washer is provided between the second vest and the disc spring.

10. The three-roller guide with adaptive aperture adjustment according to claim 1, characterized in that, The housing includes a detachably connected guide body and a cover.

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