A forming roll dresser and method of dressing

Abstract

The application provides a forming roller dresser and a dressing method, which comprise an angle grinder and a dressing rotating seat for placing the forming roller, and the angle grinder is used for dressing the forming roller when the forming roller is driven to rotate around the dressing rotating seat. The dressing rotating seat comprises a semi-thrust bearing, a rotating disc base, a rotating disc and a sleeve replacement part. The semi-thrust bearing is installed in the inner hole of the rotating disc base, the lower part of the rotating disc is installed on the semi-thrust bearing, the upper part of the rotating disc is installed with the sleeve replacement part, and the top of the sleeve replacement part is provided with an installation hole. The application adopts the semi-thrust bearing, effectively utilizes the self-gravity of the dresser to ensure that the cooperation gap between the semi-thrust bearing and other components is always close to zero, and effectively ensures the rotation stability under the centrifugal force. Since the sleeve replacement part is adopted, not only the forming roller can be dressed, but also other various forming rollers with different diameters can be dressed by changing the design size of the square hole at the top of the sleeve.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical processing repair, and particularly relates to a forming roller refacer and a refacing method. BACKGROUND

[0002] The forming roller used by a forming device of a spiral welded pipe is a non-standard bearing roller for one-time use. No matter how long a cycle is used, the forming roller should be discarded as waste if the roller surface arc is worn and appears an edge. Because the roller surface hardness and precision are high, the lathe and grinding machine cannot repair the forming roller. Even if the lathe is processed, the forming roller needs to be annealed and re-heat treated in the later period. The process capability of the forming roller repaired again is greatly reduced, and the consumption of spare parts of the device caused by various reasons is also high. SUMMARY

[0003] The present application aims to provide a forming roller refacer to overcome the above technical problems in the prior art.

[0004] Another object of the present application is to provide a forming roller refacing method to realize flexible refacing and high refacing roundness precision.

[0005] To this end, the technical solution provided by the present application is as follows:

[0006] A forming roller refacer comprises an angle grinder and a refacing rotating seat, the refacing rotating seat is used for placing a forming roller, and the angle grinder is used for rubbing and driving the forming roller to rotate around the refacing rotating seat to refacing the forming roller.

[0007] The refacing rotating seat comprises a semi-thrust bearing, a rotating disc base, a rotating tray and a sleeve replacement part, the semi-thrust bearing is installed in the inner hole of the rotating disc base, the lower part of the rotating tray is installed on the semi-thrust bearing, the upper part of the rotating tray is installed with the sleeve replacement part, and the top of the sleeve replacement part is provided with an installation hole.

[0008] The abrasive disc of the angle grinder is an elastic abrasive disc or a polishing abrasive disc.

[0009] The rotating tray comprises a main shaft, a bearing tray and an outer edge, the main shaft passes through the middle part of the bearing tray and is fixedly connected with the bearing tray, and the outer edge is arranged along the circumference of the bearing tray to form a collecting cavity.

[0010] The lower part of the main shaft is installed on the semi-thrust bearing, and the upper part of the main shaft is installed with the sleeve replacement part.

[0011] The semi-thrust bearing is installed in the inner hole of the rotating disc base through an overfitting gap, and the sleeve replacement part is installed on the rotating tray through an overfitting gap.

[0012] The installation hole is a square hole or a round hole.

[0013] The main shaft is a tapered shaft.

[0014] The forming roller grinding method adopts a forming roller grinder, places the shaft head of the forming roller in the mounting hole on the top of the sleeve replacement part, contacts the abrasive disc of the angle grinder with the forming roller surface at 45 degrees, continuously grinds while driving the forming roller to rotate, moves the angle grinder to realize continuous flexible grinding from the roller surface along the gradually downward direction, and completes the grinding of the forming roller.

[0015] The beneficial effects of the present application are:

[0016] The forming roller grinder provided by the present application adopts a semi-thrust bearing, effectively utilizes the gravity of the grinder to ensure that the cooperation gap between the semi-thrust bearing and other components is always close to zero, and effectively ensures the rotation stability under centrifugal force. Since the sleeve replacement part is adopted, not only the forming roller can be ground, but also other sizes of various forming rollers can be ground by changing the design size of the square hole at the top of the sleeve.

[0017] The large outer diameter of the rotating tray increases the moment of inertia of the rotating tray, and the potential energy is sufficient to ensure that the continuous rotation time is longer and the grinding efficiency is higher during work, and a large amount of iron powder can be collected by the tray; and the large-diameter tray has a low center of gravity, which improves the rotation stability.

[0018] The sleeve is relatively thick, and by using a moderate running fit gap, the grinder can be stopped instantly by grabbing the outer edge of the tray at a moderate height of 10 mm when rotating at high speed, and the rotation inertia is released by the gap between the sleeve and the rotating tray, achieving a safe braking effect without hurting the hand.

[0019] Any angle grinder can be used, as long as it is a flexible abrasive disc or polishing disc, and an adult can operate to realize the rotation function and flexible grinding, and can learn to operate skillfully in a short time, so the promotion is very good.

[0020] Further detailed description will be made below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an internal section view of an embodiment of the present application grinding rotating seat;

[0022] Figure 2 is an assembly view of an embodiment of the present application grinding rotating seat;

[0023] Figure 3 is a working schematic view of the present application.

[0024] In the drawings: 1, semi-thrust bearing; 2, rotating tray base; 3, rotating tray; 4, sleeve replacement part; 5, conical shaft; 6, outer edge; 7, supporting tray; 8, square hole; 9, angle grinder; 10, forming roller. DETAILED DESCRIPTION

[0025] The advantages and features of the present application will become apparent to one skilled in the art upon examination of the following

[0026] While the application is amenable to variations designed to achieve the same objectives, the application is described herein in terms of specific embodiments. Description of these embodiments is intended to cover the application as well as variations thereof, and is not intended to limit the scope of the application. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The same reference numerals in different drawings represent the same element.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0028] The embodiment provides a forming roller dresser, which comprises an angle grinder 9 and a dresser rotating seat for placing a forming roller 10, and the angle grinder 9 is used to dress the forming roller 10 when the forming roller 10 is driven to rotate around the dresser rotating seat.

[0029] Use process:

[0030] The forming roller 10 is placed on the dresser rotating seat, the angle grinder 9 is held at an angle of 45 degrees with the roller surface of the forming roller 10, the electric power of the electric tool angle grinder 9 is used to rotate at a high speed, a 45-degree friction pushing force is generated with the roller surface of the forming roller 10, a part of the horizontal semi-friction pushing force is formed to achieve a continuous acceleration rotating action, and a part of the vertical semi-friction resistance is formed to achieve a restriction rotating action, the resultant force of the pushing force and the resistance force achieves a dressing action.

[0031] Embodiment 2:

[0032] On the basis of the embodiment 1, the embodiment provides a forming roller dresser, the dresser rotating seat comprises a semi-thrust bearing 1, a rotating disc base 2, a rotating disc 3 and a sleeve replacement 4, the semi-thrust bearing 1 is installed in the inner hole of the rotating disc base 2, the rotating disc 3 is installed at the lower part of the semi-thrust bearing 1, the sleeve replacement 4 is installed at the upper part of the rotating disc 3, and the installation hole is formed at the top of the sleeve replacement 4.

[0033] The forming roller refiner provided by the application adopts a semi-thrust bearing 1, effectively utilizes the gravity of the refiner to ensure that the fitting gap between the semi-thrust bearing 1 and other components is always close to zero, and effectively ensures the rotation stability under centrifugal force. Since the sleeve replacement part 4 is connected to the shaft head of the forming roller 10, the forming roller 10 can be not only refined, but also other various forming rollers 10 of different diameters can be refined by changing the design size of the square hole at the top end of the sleeve.

[0034] Embodiment 3

[0035] Based on the embodiment 1, the embodiment provides a forming roller refiner, wherein the abrasive disc of the angle grinder 9 is an elastic abrasive disc or a polishing abrasive disc.

[0036] The embodiment can use any commonly used angle grinder 9 on the market, as long as it is an elastic abrasive disc or a polishing disc. Adult operation can realize the rotation function and flexible refining, and short-time operation can learn skilled operation, so it is easy to promote.

[0037] Embodiment 4

[0038] Based on the embodiment 2, the embodiment provides a forming roller refiner, wherein the rotating tray 3 comprises a main shaft, a bearing tray and an outer rim 6, the main shaft passes through the middle of the bearing tray and is fixedly connected with the bearing tray, and the outer rim 6 is arranged along the circumference of the bearing tray to form a collection cavity.

[0039] The lower part of the main shaft is mounted on the semi-thrust bearing 1, and the sleeve replacement part 4 is mounted on the upper part of the main shaft.

[0040] The bearing tray is designed as a tray with a large outer diameter of ≥320 mm, so that the moment of inertia of the rotating tray 3 is increased, the potential energy is sufficient, the continuous rotation time during work is long, the refining efficiency is ensured, and a large amount of iron powder can be collected in the tray; the center of gravity of the large-diameter tray is low, and the rotation stability is improved. Since the forming roller 10 generally has a large weight, the rotation physics is simple, the flying powder during grinding is small, and the directional collection can be realized through the collection cavity, so the safety and environmental protection are realized.

[0041] Embodiment 5

[0042] Based on the embodiment 2, the embodiment provides a forming roller refiner, wherein the semi-thrust bearing 1 is mounted in the inner hole of the rotating disc base 2 through an excessive fitting gap, and the sleeve replacement part 4 is mounted on the main shaft of the rotating tray 3 through an excessive fitting gap.

[0043] As shown in Figure 1 , a suitable semi-thrust bearing 1 is selected and mounted in the inner hole of the rotating disc base 2 through an excessive fitting gap; the main shaft of the rotating tray 3 is mounted on the semi-thrust bearing 1; and the sleeve replacement part 4 is mounted on the main shaft of the rotating tray 3 through an excessive fitting gap.

[0044] Example 6:

[0045] Based on Example 2, this example provides a forming roller grinding tool, wherein the mounting hole is a square hole 8 or a round hole.

[0046] like Figure 2 As shown, the inner hole of the ferrule replacement part 4 is a square hole 8. During grinding, the square shaft end of the forming roller 10 is placed in the square hole 8 of the ferrule replacement part 4, and the grinding work of the forming roller 10 is started each time. Figure 3 As shown. The electric power of the angle grinder 9, which is equipped with an elastic grinding disc (or a polishing disc), rotates at high speed. As long as the grinding angle is well controlled, ensuring that the flying sparks are at a horizontal angle of 45 degrees, the following is utilized: part of the frictional driving force at 45 degrees causes the forming roller 10, the replacement sleeve 4, and the rotating tray 3 to rotate at the same speed, and the other part decomposes the rotational force to form frictional resistance, thereby achieving the purpose of grinding the high point of the arc surface. While the angle grinder 9 moves up and down gradually, the effect of continuously correcting the arc surface is achieved.

[0047] Example 7:

[0048] This embodiment provides a forming roller grinding tool, including an angle grinder 9 and a grinding turntable. The grinding turntable includes a semi-thrust bearing 1, a turntable base 2, a rotating tray 3, and a ferrule replacement part 4.

[0049] like Figure 1 , Figure 2 As shown, the semi-thrust bearing 1 is installed in the inner hole of the turntable base 2 with an overfit clearance. The rotating tray 3 includes a main shaft, a bearing tray, and an outer edge 6. The lower part of the main shaft is mounted on the semi-thrust bearing 1, and the ferrule replacement part 4 is installed on the upper part of the main shaft with an overfit clearance. The ferrule replacement part 4 has a mounting hole on its top for engaging the forming roller 10. For ease of installation, the main shaft 5 is a tapered shaft.

[0050] like Figure 3 As shown, during grinding, the electric rotation friction force of the elastic grinding disc (or the polishing disc) of the power tool angle grinder 9 is used to rotate at high speed. As long as the grinding direction angle is well controlled, and the splashed sparks are kept at a horizontal angle of 45 degrees, a part of the horizontal semi-friction thrust and a part of the vertical axial friction resistance are formed, thus achieving the first purpose of continuous rotation grinding. The second purpose is to achieve continuous and flexible grinding from the upper edge of the roller surface to the lower edge by the operator's technique.

[0051] The rotating pallet 3 is designed with a large outer diameter of ≥320mm, which increases the inertia of the rotating pallet 3 and provides sufficient potential energy, ensuring a longer continuous rotation time and higher grinding efficiency during operation. The outer edge height of the rotating pallet 3 is 10mm, which allows the grinding and cutting splatter powder to be directionally retained and collected in the pallet, which is safe and environmentally friendly. The large diameter pallet has a low center of gravity, which improves rotational stability.

[0052] The sleeve design is relatively thick, and by using a moderate fit clearance, the grinder can be stopped instantly by holding the tray 10 mm moderate height outer edge 6 when rotating at high speed, and the rotational inertia is released by the clearance between the sleeve replacement part 4 and the rotating tray 3, achieving a safe braking effect without hurting the hand. By changing the size of the top mounting hole of the sleeve replacement part 4, various profile rollers 10 of other sizes and diameters can be ground.

[0053] Embodiment 8:

[0054] The embodiment provides a profile roller grinding method, which adopts a profile roller grinder, places a shaft head of a profile roller in a mounting hole at the top of a sleeve replacement part, contacts a grinding disc of an angle grinder with a profile roller surface at an angle of 45°, continuously grinds while driving the profile roller to rotate, moves the angle grinder to achieve continuous flexible grinding from the profile roller surface along the gradually downward direction, and completes the grinding of the profile roller.

[0055] The present application realizes rapid manual operation of roller working surface grinding by simple tools, completely changes the existing state, and fills the gap of profile roller grinding special tools. The structure is simple, the investment is small, and the realization is convenient. The large tray can protect the bearing and is maintenance-free. The tool can realize fast transportation, is operable in a small space, and has high work efficiency. The work result is obvious to see, the grinding roundness precision is relatively high, and the value is intuitive.

[0056] The above examples are only illustrative of the present application and do not constitute a limitation on the protection scope of the present application. Any design identical or similar to the present application belongs to the protection scope of the present application.

Claims

1. A forming roll dresser characterized by: The application relates to a grinder and a grinding rotating seat for placing a forming roller, wherein the grinder is used for rubbing and grinding the forming roller when the forming roller rotates around the grinding rotating seat; and the grinding disc of the grinder is in contact with the roller surface at an angle of 45 degrees. The grinding rotating seat comprises a semi-thrust bearing, a rotating disc base, a rotating disc and a sleeve replacement part, the semi-thrust bearing is installed in the inner hole of the rotating disc base, the lower part of the rotating disc is installed on the semi-thrust bearing, the upper part of the rotating disc is provided with the sleeve replacement part, and the top of the sleeve replacement part is provided with an installation hole. The rotating disc comprises a main shaft, a bearing disc and an outer edge, the main shaft passes through the middle part of the bearing disc and is fixedly connected with the bearing disc, and the outer edge is arranged along the circumference of the bearing disc to form a collecting cavity. The lower part of the main shaft is installed on the semi-thrust bearing, the upper part of the main shaft is provided with the sleeve replacement part, the sleeve replacement part is installed on the rotating disc through an overfitting gap, and the main shaft is a taper shaft.

2. A forming roll dresser according to claim 1 wherein: The grinding disc of the grinder is an elastic grinding disc or a polishing grinding disc.

3. A forming roll dresser according to claim 1 wherein: The semi-thrust bearing is installed in the inner hole of the rotating disc base through an overfitting gap.

4. A forming roll dresser according to claim 1 wherein: The installation hole is a square hole or a round hole.

5. A method of profiling a forming roll using the forming roll profiler of claim 1, characterized by: The shaft head of the forming roller is placed in the installation hole at the top of the sleeve replacement part, the grinding disc of the grinder is in contact with the roller surface at an angle of 45 degrees, continuous grinding is carried out while the forming roller rotates, the grinder is moved to realize continuous flexible grinding from the roller surface along the gradually downward direction, and the grinding of the forming roller is completed.

Images