CN201214061Y

CN201214061Y - Patch welding type squeezing and crushing roller

Info

Publication number: CN201214061Y
Application number: CNU2008200984388U
Authority: CN
Inventors: 魏炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-29
Filing date: 2008-05-29
Publication date: 2009-04-01
Anticipated expiration: 2018-05-29

Abstract

The utility model discloses a welding-on squeeze crushing roller, which comprises a roller body. The surface of the roller body is provided with a round hole, a wear-resistant stud is subjected to resurfacing welding by a welding method from the inside of the round hole and protrudes on the surface of the roller body with the height of between 1 and 5mm, and the depth of the hole is between 5 and 20mm. The roller has a simple structure, is easy to process, and has the advantages that: 1. the roller reduces the residual internal stress of the welding, and improves contact fatigue resistance; 2. the wear-resistant stud and the roller body are metallurgically bonded, which prevents the wear-resistant alloy stud from cracking and falling; 3. the roller improves comprehensive performances of wear resistance and shock resistance of the surface of the roller; and 4. the roller improves production efficiency and reduces the cost for wear-resistant resurfacing welding.

Description

Welding-on formula attrition crushing roller

Technical field

The utility model relates to a kind ofly makes its broken attrition crushing roller with hard material with fashion of extrusion, belongs to the engineering equipment technical field.

Background technology

Roll squeezers etc. because it is efficient, energy-conservation, present special advantages and prospect with the method for heavily stressed extruding pair roller broken material on broken industries such as building materials, mine.Compression roller is when materials such as breaking ores, clinker, and roll surface is bearing violent high stress material abrasion, plow wearing and tearing and fatigue rupture, so the wearability of compression roller roll surface and the key technical index that has just become equipments such as roll squeezer service life.

At present, the major technique measure that improves compression roller roll surface wearability and service life both at home and abroad divides two classes:

1, the direct different wear resistant alloy material of built-up welding forms the wearability that wear-resisting post nail 2 improves roll surface on common material roll body 1 surface.Its structure is seen Fig. 1.But if select for use the hardfacing materials of high rigidity to improve wearability, roll surface is easy to cracking and causes wearable overlay to peel off, and influences the service life of roll body.And select the hardfacing materials of soft for use, anti-wear performance is relatively poor again.Simultaneously, this structure is under the brute force extruding of hard material, and the wear-resisting post nail that built-up welding goes out collapses from coming off from the roll body surface easily.The thickness of built-up welding is subjected to certain restriction.Thereby the wearability of the roll surface of this method manufacturing is difficult to be greatly improved, and the friction durability of roll surface, generally at 2,000 8000 hours, its working life can not satisfy customer requirements.

2, roll surface punching tungsten carbide button cylinder improves the wearability of roll surface.Promptly the circular hole of processing the certain diameter and the degree of depth earlier and arranging by rule on common material roll body 1 surface is inlayed the circular hole the inside to the carbide alloy cylinder heat that manufacturing is good in advance then and is formed post nail 2.Guarantee the anti-wear performance of roll surface by the high rigidity carbide alloy, its structure is seen Fig. 2.The roll surface life-span can reach about 20000 hours this structure in the ideal case, but the carbide alloy cylinder manufacturing cost height in this structure, operation and maintenance cost is very high, and carbide alloy cylinder and roll body metal be combined into mechanical bond, roll body can cause that the carbide alloy cylinder comes off after long-time running.In case coming off, roll surface alloy cylinder just can't carry out desirable reparation at the scene rapidly.Therefore this structure fails extensively to be promoted in practice.

Compression roller roll body surface wear-resistant layer premature failure is the challenging technical barrier of broken industry, does not also have effective solution at present.

The utility model content

At the prior art above shortcomings, the purpose of this utility model provides a kind of wear-resisting post nail and combines more firm welding-on formula attrition crushing roller with roll body, this structure can solve the broken compression roller roll surface of equipment wearability deficiency, the too early spalling failure problems of hardfacing materials such as roll squeezer, improve the compression roller life-span, can guarantee effectively that the roll surface long-term safety moves reliably.

The technical solution of the utility model is achieved in that welding-on formula attrition crushing roller, comprises roll body, is formed with the wear-resisting post nail of certain altitude in the roll body surface overlaying.It is characterized in that: process circular hole in advance on described roll body surface, wear-resisting post nail forms and protrudes in the roll body surface with the method built-up welding of welding in circular hole.

Described wear-resisting post nail protrudes in roll body surface 1-5mm, and hole depth is between 5-20mm.

The utility model is simple in structure, is easy to processing, and compared to existing technology, it has more following effect:

1. reduce the welding residualinternal stress, improve anti-contact fatigue property;

2. between wear-resisting post nail and the roll body is metallurgical binding, has avoided collapsing from coming off of antifriction alloy post nail;

3. improve the wear-resisting and shock resistance combination property of roll surface;

4. improve production efficiency, reduced the cost of hardfacing.

In a word, this structural manufacturing process is simply ripe, the production efficiency height, low cost of manufacture, be convenient to safeguard, can solve the broken compression roller roll surface of equipment wearability deficiency, the too early spalling failure problems of hardfacing materials such as roll squeezer, improve the compression roller life-span, can guarantee effectively that the roll surface long-term safety moves reliably, have vast market prospect.

Description of drawings

Fig. 1-prior art frame mode one schematic diagram;

Fig. 2-prior art frame mode two schematic diagrames;

Fig. 3-the utility model structural representation;

The arrangement mode figure of Fig. 4-the utility model circular hole.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Referring to Fig. 3, from the figure as can be seen, welding-on formula attrition crushing roller of the present utility model, comprise roll body 1, be formed with the some wear-resisting post nail 2 that rule is arranged in the roll body surface overlaying, described roll body surface is processed with circular hole 3 in advance, and wear-resisting post nail forms and protrude in roll body 1 surface from circular hole 3 interior built-up welding, and projecting height is 1-5mm.

Its process is: the circular hole (size of circular hole and arrangement mode influence the implementation result of this patent) that processes certain diameter and the degree of depth and arrange by rule with the method for boring in press roll surface, welding wire or welding rod with high rigidity, high-wearing feature fills up the cylindrical circular hole built-up welding of accomplishing fluently in advance then, form excellent metallurgical with roll body and combine, thereby at the antifriction alloy post nail of compression roller roll surface formation by the built-up welding formula of rule arrangement.

Concrete process and requirement are:

1, at first with the roll body Surface Machining to the size that requires.

2, hole.The size of circular hole and arrangement mode are seen accompanying drawing 4.Hole depth is between 5-20mm, and Circularhole diameter a is between 10-25mm, and the axis normal of circular hole is pointed to the axis direction of compression roller.Circular hole becomes to be staggered, and the center of circle of facing 4 circular holes mutually is connected to parallelogram.Oblique adjacent two center of circle spacing b are 12-40mm, and laterally adjacent two center of circle spacing c are 12-40mm.

3, select good hardfacing electrode of anti-wear performance or welding wire welding procedure as requested for use, full all circular hole welderings, and exceed roll surface 1-5mm formation post nail.

Main feature of the present utility model is: high-abrasive material be not built-up welding on the roll body surface, but built-up welding is at roller On the face in the manufactured circular hole. The hardfacing metal each circular hole respectively with the roll body metal solder together, Form independently wear-resisting stud and with the roll body metallurgical binding. Whole roll surface forms and is covered with the interior edge of arranging by rule The wear-resistant roller surface of formula antifriction alloy stud. Because antifriction alloy stud and roll body are metallurgical binding, and stud is subjected to To the protection of roll body metal on every side, can not come off in the course of the work. Independently the antifriction alloy stud so that Produce littler welding stress in the welding process, even guaranteed that the antifriction alloy stud hardness of built-up welding is very also high Can not ftracture. Build-up wear-resistant alloy stud can be selected the good resurfacing welding material of hardness high-wear resistance, can be Anti-wear performance and service life that big limit ground improves the compression roller roll surface. Roll body gold around the antifriction alloy stud Accessory has preferably intensity and toughness, can effectively protect the alloy stud not broken and comes off. Roll body work The fines that produces in the process is filled in the space between wear-resisting cylinder, forms the material lining protective layer of nature, alleviates The degree of wear of large granular materials to roll surface. The utility model implementation cost is lower, easy row easy to maintenance. Above characteristics have guaranteed patch welding type attrition crushing roller nail and roll surface firmly adhesion and high roll surface wear-resisting The property.

The beneficial effects of the utility model: the stud structure can significantly reduce large-scale pressure roller built-up welding residual stress, and The effect that stops crackle to enlarge and avoid the wearing layer bulk to burst apart and come off is arranged, and bead-welding technology is simply effective, safeguards Convenient.

1. reduce the welding residualinternal stress, improve contacting fatigue resistance

Be independently between the antifriction alloy stud is mutual, linked to each other by the roll body metal between the two antifriction alloy cylinders. Bonding area is little, has reduced the welding constraint (restraint) degree, can significantly reduce the welding residualinternal stress, improves the anti-of roll surface Contact fatigue property. In the compression roller course of work, roll body metal softer between the wear-resisting cylinder of internally-inlaid has Be beneficial to the release of residual stress peak value, also be conducive to reduce the fatigue damage degree.

2. improve the wear-resisting and shock resistance combination property of roll surface

Patch welding type attrition crushing roller can fully utilize high rigidity, high-wearing feature and the roller of build-up wear-resistant alloy stud The advantage of the high tenacity of body material comprehensively improves roll surface wear-resisting and shock resistance. Because antifriction alloy post The nail welding-on avoided stud to collapse from the danger that comes off, thereby it is comprehensive further to improve roll body in roll body inside Energy.

3. avoided coming off of antifriction alloy stud

It is a kind of main failure mode that roll surface destroys that the large tracts of land of compression roller roll surface wear-resisting layer comes off. This reality Be metallurgical binding completely with New-type wear-resistant alloy stud and roll body, solved by the thermal coefficient of expansion difference and cause The problem that comes off of mosaic antifriction alloy stud. There is the roll body material of high tenacity to protect between the antifriction alloy stud Protect, effective Anticrack is not even single antifriction alloy stud accidental can cause other posts yet The nail large tracts of land comes off, thereby has prolonged the service life of compression roller.

4. improve production efficiency, reduced the cost of hardfacing

The utility model patent is the isolated antifriction alloy stud of built-up welding, not in all built-up welding of roll body surface Wear resistant alloy material, the build-up wear-resistant alloy material of use is less, has reduced the built-up welding cost. This method is weldering Connect manufacturing, be easy to keep in repair at the scene after the roll body wearing and tearing. Because wear-resisting stud material and the matrix material tool of welding-on Different anti-wear performances is arranged, and the wear-resisting stud wearability of welding-on is higher than the roll body matrix material. The attrition crushing worker Do in the process the easily wearing and tearing and form small rut and then the material of nipping forms material lining nature and protects of roll body matrix material Sheath prevents that matrix from continuing wearing and tearing, has prolonged compression roller service life, has improved production efficiency.

Claims

1, welding-on formula attrition crushing roller, comprise roll body (1), be formed with wear-resisting post nail (2) in roll body (1) surface overlaying, it is characterized in that: described roll body (1) surface is preset with circular hole (3), and wear-resisting post nail (2) forms and protrude in roll body (1) surface with the method built-up welding of welding in circular hole (3).

2, welding-on formula attrition crushing roller according to claim 1 is characterized in that: described wear-resisting post nail (2) protrudes in the surperficial 1-5mm of roll body (1).