A bimetallic cone crusher cone and its surfacing method

Abstract

The present invention provides a bimetallic cone crusher cone and a surfacing method thereof, wherein wear-resistant linings, transition layers and working layers with different surfacing thicknesses, new surfacing welding materials and welding processes are used on the moving cone and the static cone. The surfacing layer includes a working layer and a transition layer, wherein the surfacing of the working layer adopts a ceramic wear-resistant surfacing welding rod, including a welding core and a coating, and the metal hardness of the surfacing layer can reach HRC75; the surfacing of the transition layer adopts ordinary welding rods such as J506. While ensuring the high wear resistance of the working layer matrix, the present invention adopts the welding structure of the transition layer, which effectively solves the problem of the difficulty in stress release of large ring parts.

Description

Technical Field

[0001] The invention relates to the technical field of cone crusher processing and relates to a bimetallic cone crusher cone and a surfacing method thereof. Background Art

[0002] Cone crusher is a kind of equipment used for crushing materials. During the working process, the moving cone and the static cone in the equipment are easy-to-wear spare parts, and their service life is only between 3000h and 4000h. In order to improve its wear resistance and impact resistance, the cone lining is usually made of high manganese steel. At present, in the wear-resistant surfacing technology, by adding tungsten carbide particles or increasing the carbon content and other alloys in the welding rod to improve the hardness of the surfacing metal layer, there are generally problems such as high carbon equivalent, low plasticity, low impact resistance, and easy peeling (block falling). Summary of the invention

[0003] The purpose of the present invention is to provide a bimetallic cone crusher cone in view of the problems existing in the prior art.

[0004] To this end, the present invention adopts the following technical solutions:

[0005] A bimetallic cone crusher cone comprises a moving cone with a small upper and large lower conical structure, a moving cone wear-resistant lining is provided on the upper surface of the moving cone, a moving cone transition layer composed of a high manganese alloy is welded on the moving cone wear-resistant lining, a moving cone working layer composed of a high chromium alloy is welded on the moving cone transition layer, a static cone is sleeved on the moving cone, the static cone has a conical cylindrical structure, a feed port is formed at the top of the static cone, a crushing chamber is formed between the moving cone and the inner wall of the static cone, a static cone wear-resistant lining is provided on the inner wall of the static cone, a static cone transition layer composed of a high manganese alloy is welded on the static cone wear-resistant lining, and a static cone working layer composed of a high chromium alloy is welded on the static cone transition layer.

[0006] Furthermore, the thickness of the movable cone wear-resistant lining is 18-45 mm.

[0007] Furthermore, the moving cone working layer includes an upper working surface, a middle working surface and a lower working surface, the upper working surface has a thickness of 0-20 mm, the middle working surface has a thickness of 10-30 mm, and the lower working surface has a thickness of 10-30 mm.

[0008] Furthermore, the dynamic cone transition layer includes an upper region, a middle region and a lower region, the thickness of the upper region is 0-4 mm, the thickness of the middle region is 2-5 mm, and the thickness of the lower region is 2-5 mm.

[0009] Furthermore, the thickness of the static cone wear-resistant lining is 18-50 mm.

[0010] Furthermore, the thickness of the static cone working layer is 0-20 mm.

[0011] Furthermore, the thickness of the static cone transition layer is 0-3 mm.

[0012] The present invention also provides a bimetallic cone crusher cone surfacing method, comprising the following steps:

[0013] (1) Pretreatment: cleaning and inspecting the cracks of the movable cone wear lining and the static cone wear lining as claimed in any one of claims 1 to 7, grinding the movable cone wear lining and the static cone wear lining with crack depth not exceeding 10 mm, and scrapping the rest;

[0014] (2) Dynamic cone surfacing: the dynamic cone transition layer and the dynamic cone working layer are sequentially surfacing on the surface of the dynamic cone wear-resistant lining. The dynamic cone transition layer uses J506 welding rod, and the dynamic cone working layer uses ceramic wear-resistant welding rod;

[0015] (3) Static cone cladding: The static cone transition layer and the static cone working layer are clad on the surface of the static cone wear-resistant lining in sequence. The static cone transition layer uses J506 welding rod, and the static cone working layer uses ceramic wear-resistant welding rod.

[0016] Furthermore, the ceramic wear-resistant welding rod includes a welding core and a coating, the weight coefficient of the coating accounting for the total weight of the welding rod is 0.44, the weight percentage of the chemical components contained in the coating is: marble 21%, fluorite 18%, mica + bentonite 22%, rutile + titanium dioxide 14%, ferrotitanium 6%, ferromanganese 6%, ferrosilicon 5%, ferrochrome 4%, nickel 2%, rare earth oxide 2%, the weight percentage of the chemical components contained in the welding core is: C: 2-4%, Cr: 9-12%, Mn: 1-2%, Nb: 0.1-0.3%, Mo: 0.3-1%, Ti: 0.1-0.4%, V: 0.1-1%, Si: 0.2-1%, P: 0-0.03%, S: 0-0.04%, and the balance is Fe.

[0017] Furthermore, the surfacing current is 110-200A, the voltage is 20-35V, the temperature between welding layers is not more than 90°C, and multi-layer surfacing is adopted when the thickness of the welding layer is greater than 7mm. When multi-layer surfacing is used, the thickness of a single surfacing layer does not exceed 5mm, and the weld width is 8-13mm.

[0018] The beneficial effects of the present invention are:

[0019] (1) Wear-resistant lining, transition layer and working layer are set on the upper surface of the moving cone and the inner wall of the static cone by surfacing welding, so that the moving cone and the static cone have sufficient wear resistance. The metal hardness of the working layer can reach HRC75, which greatly extends the service life of the cone.

[0020] (2) Since the working layer of the cladding is annular, a transition layer is set between the working layer and the wear-resistant lining. The hardness of the transition layer is much lower than that of the working layer and also lower than that of the wear-resistant lining substrate. In this way, it is equivalent to setting a layer of elastomer between the working layer and the wear-resistant lining. Combined with low-stress welding processes such as multi-layer working layer and weld overlap, the internal stress of the working layer can be effectively released during the cladding process to prevent stress concentration from causing damage to the working layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] In the figure, 1-moving cone, 2-moving cone wear-resistant lining, 3-moving cone working layer, 301-upper working surface, 302-middle working surface, 303-lower working surface, 4-moving cone transition layer, 401-upper area, 402-middle area, 403-lower area, 5-static cone, 6-feeding port, 7-crushing chamber, 8-static cone wear-resistant lining, 9-static cone working layer, 10-static cone transition layer. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with embodiments:

[0024] Example 1

[0025] like Figure 1As shown, a bimetallic cone crusher cone comprises a movable cone 1 with a small upper and a large lower conical structure, a movable cone wear-resistant lining 2 is arranged on the upper surface of the movable cone 1, and the movable cone wear-resistant lining 2 is an integral structure with the movable cone 1, which can be conveniently surfacing on the movable cone 1, and the thickness of the movable cone wear-resistant lining is 28 mm, and a movable cone transition layer 4 composed of a high manganese alloy is surfacing on the movable cone wear-resistant lining 2. The movable cone transition layer 4 is surfacing welded with a J506 welding rod, and the J506 welding rod has a high manganese content. The tensile strength of the movable cone transition layer 4 formed after surfacing is much greater than that of ordinary welding rods such as E4315. The movable cone transition layer 4 comprises an upper region 401, a middle region 402 and a lower region 403. The thickness of the upper region 401 is 0-4 mm, the thickness of the middle region 402 is 2-5 mm, and the thickness of the lower region 403 is 2-5 mm. The movable cone transition layer 4 is surfacing welded with a movable cone working Layer 3, the moving cone working layer 3 is a high chromium alloy. Since the moving cone working layer 3 will directly contact the material to extrude and crush the material, and in actual use, the degree of wear of the material on various parts of the moving cone working layer 3 is different. The moving cone working layer 3 includes an upper working surface 301, a middle working surface 302 and a lower working surface 303, which respectively correspond to the upper area 401, the middle area 402 and the lower area 403 of the moving cone transition layer 4. The thickness of the upper working surface 301 is 0-20mm, the thickness of the middle working surface 302 is 10-30mm, and the thickness of the lower working surface 303 is 10-30mm. Setting different thicknesses for the working layer 3 can save material costs according to actual wear conditions. The moving cone transition layer 4 and the moving cone working layer 3 are welded with electrodes of different materials. The moving cone transition layer 4 can release the stress of the moving cone working layer 3 after the moving cone working layer 3 is welded.

[0026] A static cone 5 is sleeved on the dynamic cone 1. The static cone 5 is in a conical cylindrical structure. A feed port 6 is formed at the top of the static cone 5. Materials can enter the static cone 5 from the feed port 6. A crushing chamber 7 is formed between the dynamic cone 1 and the inner wall of the static cone 5. After the materials enter the static cone 5, they are crushed in the crushing chamber 7. A static cone wear-resistant lining 8 is provided on the inner wall of the static cone 5. The static cone wear-resistant lining 8 and the static cone 5 are integrated with structural adhesive. The thickness of the static cone wear-resistant lining 8 is 18-50mm. In this embodiment, the static cone wear-resistant lining 8 is 28mm. A static cone transition layer 10 is welded on the static cone wear-resistant lining 8. The static cone transition layer 10 is also made of high manganese alloy. The thickness of the static cone transition layer 10 is 0-3mm. A static cone working layer 9 is welded on the static cone transition layer 10. The thickness of the static cone working layer 9 is 0-20mm. The static cone transition layer 10 and the static cone working layer 9 are made of different materials, so that the static cone working layer 9 can release internal stress after welding.

[0027] When the cone is in use, the movable cone 1 rotates to place the material from the feed port 6 into the static cone 5. The material reaches the crushing chamber 7 under the action of gravity, and is crushed by the static cone working layer 9 and the movable cone working layer 3 through squeezing and friction. The metal hardness of the surfacing welded static cone working layer 9 and the movable cone working layer 3 can reach HRC75, which effectively increases the service life of the cone of the cone crusher.

[0028] Example 2

[0029] The present invention also provides a bimetallic cone crusher cone surfacing method, comprising the following steps:

[0030] (1) Pretreatment: Clean the movable cone wear lining 2 and the static cone wear lining 8 and detect the cracks. Specifically, penetration testing or magnetic particle testing can be used. If the crack depth does not exceed 10 mm, grind it with an angle grinder. If there are "fish scale"-shaped wear pits on the surface of the movable cone wear lining 2 and the static cone wear lining 8, use a carbon arc air planer to remove the edges and corners of the wear pits, and then use an angle grinder to grind them smooth for surfacing operation. For the movable cone wear lining 2 or the static cone wear lining 8 with a crack depth of more than 10 mm, the cracks are too deep and cannot be filled after surfacing, which easily causes stress concentration and damage, so they are scrapped.

[0031] (2) Moving cone surfacing. In this embodiment, the thickness of the moving cone wear-resistant lining 2 is 28 mm. The moving cone transition layer 4 is surfacing-welded on the surface of the moving cone wear-resistant lining 2 using a J506 electrode. When surfacing the moving cone transition layer 4, the lower area 403 is firstly surfacing-welded, then the middle area 402, and finally the upper area 401 in a bottom-to-top order. In this embodiment, the thickness of the upper area 401 is 1 mm, the thickness of the middle area 402 is 2 mm, and the thickness of the lower area 403 is 2 mm. After the moving cone transition layer 4 is completed, the surfacing operation of the moving cone working layer 3 can be carried out. The surfacing is carried out using a ceramic wear-resistant electrode. Similarly, the lower working surface 303 is firstly surfacing-welded, and its thickness is 20 mm. Then, the middle working surface 302 is surfacing-welded, and its thickness is 20 mm. Finally, the upper working surface 301 is surfacing-welded, and its thickness is 10 mm.

[0032] (3) Static cone surfacing: J506 welding rod is used to surfacing the static cone transition layer 10 on the surface of the static cone wear-resistant lining 8. In this embodiment, the thickness of the static cone wear-resistant lining 8 is 28 mm. In this embodiment, the thickness of the static cone transition layer 10 is 2 mm. Finally, the static cone working layer 9 can be surfacing. In this embodiment, its thickness is 20 mm. Ceramic wear-resistant welding rod is used for surfacing.

[0033] In the above-mentioned surfacing process, the diameter of J506 welding rod and ceramic wear-resistant welding rod is selected to be 3.2mm, the current is 110~200A, the voltage is 20~35V, the current is selected to be 110A, the voltage is 25V, and the method of adding air duct at the weld position is adopted during welding to make the interlayer temperature not greater than 90℃, the weld overlap is 45%~50%, the weld width is 8~13㎜, and when the weld layer thickness exceeds 7mm, a multi-layer surfacing mode is adopted, and the single-layer surfacing thickness does not exceed 5mm during multi-layer surfacing.

[0034] The ceramic wear-resistant welding rod used in this embodiment includes a welding core and a coating, the weight coefficient of the coating to the total weight of the welding rod is 0.44, the weight percentage of the chemical components contained in the coating is: marble 21%, fluorite 18%, mica + bentonite 22%, rutile + titanium dioxide 14%, ferrotitanium 6%, ferromanganese 6%, ferrosilicon 5%, ferrochrome 4%, nickel 2%, rare earth oxide 2%, the weight percentage of the chemical components contained in the welding core is: C: 2.74%, Cr: 10.6%, Mn: 1.41%, Nb: 0.212%, Mo: 0.514%, Ti: 0.268%, V: 0.312%, Si: 0.69%, P: 0.024%, S: 0.031%, and the balance is Fe.

Claims

1. A bimetallic cone crusher cone, characterized in that: The invention comprises a moving cone with a small upper and a large lower conical structure, wherein a moving cone wear-resistant lining is provided on the upper surface of the moving cone, a moving cone transition layer composed of a high manganese alloy is welded on the moving cone wear-resistant lining, the moving cone transition layer comprises an upper region, a middle region and a lower region, the thickness of the upper region is 0-4mm, the thickness of the middle region is 2-5mm, the thickness of the lower region is 2-5mm, a moving cone working layer composed of a high chromium alloy is welded on the moving cone transition layer, a static cone is sleeved on the moving cone, the static cone is in a conical cylindrical structure, a feed port is formed at the top of the static cone, a crushing chamber is formed between the moving cone and the inner wall of the static cone, a static cone wear-resistant lining is provided on the inner wall of the static cone, a static cone transition layer composed of a high manganese alloy is welded on the static cone wear-resistant lining, and a static cone working layer composed of a high chromium alloy is welded on the static cone transition layer.

2. A bimetallic cone crusher cone according to claim 1, characterized in that: The thickness of the movable cone wear-resistant lining is 18-45 mm.

3. A bimetallic cone crusher cone according to claim 1, characterized in that: The moving cone working layer includes an upper working surface, a middle working surface and a lower working surface. The thickness of the upper working surface is 0-20 mm, the thickness of the middle working surface is 10-30 mm, and the thickness of the lower working surface is 10-30 mm.

4. A bimetallic cone crusher cone according to claim 1, characterized in that: The thickness of the static cone wear-resistant lining is 18-50 mm.

5. A bimetallic cone crusher cone according to claim 1, characterized in that: The thickness of the static cone working layer is 0-20 mm.

6. A bimetallic cone crusher cone according to claim 1, characterized in that: The thickness of the static cone transition layer is 0-3 mm.

7. A method for surfacing the cone of a bimetallic cone crusher, characterized in that: The following steps are involved: (1) Pretreatment: cleaning and inspecting the cracks of the movable cone wear lining and the static cone wear lining as described in any one of claims 1 to 6 above, grinding the movable cone wear lining and the static cone wear lining with crack depth not exceeding 10 mm, and scrapping the rest; (2) Dynamic cone surfacing: The dynamic cone transition layer and the dynamic cone working layer are sequentially surfacing on the surface of the dynamic cone wear-resistant lining. The dynamic cone transition layer uses J506 welding rod, and the dynamic cone working layer uses ceramic wear-resistant welding rod; (3) Static cone cladding: The static cone transition layer and the static cone working layer are welded on the surface of the static cone wear-resistant lining in sequence. The static cone transition layer uses J506 welding rod, and the static cone working layer uses ceramic wear-resistant welding rod.

8. A bimetallic cone crusher cone surfacing method according to claim 7, characterized in that: The ceramic wear-resistant welding rod comprises a welding core and a coating, wherein the weight coefficient of the coating to the total weight of the welding rod is 0.44, the weight percentage of the chemical components contained in the coating is: 21% of marble, 18% of fluorite, 22% of mica+bentonite, 14% of rutile+titanium dioxide, 6% of ferrotitanium, 6% of ferromanganese, 5% of ferrosilicon, 4% of ferrochrome, 2% of nickel, and 2% of rare earth oxides, and the weight percentage of the chemical components contained in the welding core is: C: 2-4%, Cr: 9-12%, Mn: 1-2%, Nb: 0.1-0.3%, Mo: 0.3-1%, Ti: 0.1-0.4%, V: 0.1-1%, Si: 0.2-1%, P: 0-0.03%, S: 0-0.04%, and the balance is Fe.

9. A bimetallic cone crusher cone surfacing method according to claim 7, characterized in that: In the steps (2) and (3), the surfacing current is 110-200A, the voltage is 20-35V, the temperature between welding layers is not more than 90°C, and when the thickness of the welding layer is greater than 7mm, multi-layer surfacing is adopted. When multi-layer surfacing is adopted, the thickness of a single surfacing layer does not exceed 5mm, and the width of the weld is 8-13mm.

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