Reinforced cutting pick with good wear resistance

Abstract

The utility model relates to the technical field of tunnel boring machines, coal mining machines and shield tunneling machines, and discloses a reinforced cutting pick with good wear resistance, which comprises a cutting pick body and a hard alloy tool bit, the cutting pick body consists of a cutting pick handle and a cutting pick head, and the cutting pick handle and the cutting pick head are integrally formed. A clamping spring groove is formed in the outer surface of the end, away from the cutting pick head, of the cutting pick handle, the cutting pick head is composed of a conical shape and a cylindrical shape, and a threaded groove is formed in the center of the end, away from the cutting pick handle, of the cutting pick head. The plurality of straight reinforcing ribs play a role of axial reinforcing ribs on the cutting pick head, and the alloy material has higher hardness, so that through the arrangement of the straight reinforcing ribs, an excellent wear-resistant role is played, the protection on the hard alloy tool bit is increased, and the service life of the cutting pick head is prolonged. In addition, a better anti-impact effect can be achieved in the using process, meanwhile, the using efficiency of the cutting pick body is improved, and the service life of the cutting pick body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel boring machines, coal mining machines and shield machines, in particular to a reinforced pick with good wear resistance. Background Art

[0002] In the existing technology, roadheaders, coal mining machines and shield machines are widely used in various coal mines and tunnel excavation; the cutting head is the main component of roadheaders, coal mining machines and shield machines, and the cutting teeth are fixed on the cutting head through the tooth seat. The cutting teeth usually use carbide tooth tips (called carbide cutting teeth), which are mostly conical in shape and directly fixed on the corresponding base. During the actual working process, the cutting head cuts the rock through the cutting teeth in an impact manner and is the main force-bearing component.

[0003] Among them, when encountering rock formations with higher hardness, they are subjected to greater impact loads and friction, and the carbide picks on them wear out faster, seriously affecting the working efficiency of tunneling machinery and coal mining machinery.

[0004] The traditional ordinary picks have the following shortcomings: with the rapid wear of the carbide cutter head, the picks become blunt and it is difficult to effectively cut the rock. When the pick wear on the entire cutting head reaches a certain level, the excavation efficiency will drop significantly. In addition, since the pick shank is installed on the tooth seat, the tooth seat has no radial constraint on the pick shank, and the pick shank can rotate around the center of the tooth seat. The pick shank has low wear resistance. During operation, the pick shank wears around the carbide cutter head. When it is severely worn, the pick shank loses its supporting and protective effect on the carbide cutter head, causing the carbide cutter head to fall off as a whole before it is completely worn out, and the pick fails. Therefore, picks with better impact strength and wear resistance are needed in production. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a reinforced pick with good wear resistance. The straight reinforcing ribs not only provide excellent wear resistance and increase protection for the carbide cutter head, but also provide better impact resistance during use, while also improving the efficiency and life of the pick body. The invention solves the problem that as the carbide cutter head wears rapidly, the pick becomes blunt and becomes difficult to effectively cut the rock. When the pick wear on the entire cutting head reaches a certain level, the excavation efficiency will drop significantly. In addition, since the pick shank is mounted on the tooth seat, the tooth seat has no radial constraint on the pick shank, and the pick shank can rotate around the center of the tooth seat. The pick shank has low wear resistance, and the pick shank wears around the carbide cutter head before the carbide cutter head during work. When it is severely worn, the pick shank loses its supporting and protective effect on the carbide cutter head, causing the carbide cutter head to fall off as a whole before it is completely worn, and the pick fails.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: a reinforced pick with good wear resistance, comprising a pick body and a carbide bit, wherein the pick body is composed of a pick shank and a pick head, and the pick shank and the pick head are integrally formed, a retaining spring groove is provided on the outer surface of the end of the pick shank away from the pick head, the pick head is composed of a conical shape and a cylindrical shape, a threaded groove is provided at the center position of the end of the pick head away from the pick shank, and a plurality of axial grooves are evenly provided on the outer surface of the pick head;

[0009] Among them, the outer surface of the pick head is evenly welded with several groups of wear-resistant mechanisms, and each group of wear-resistant mechanisms consists of three alloy beans. The several groups of wear-resistant mechanisms and the several axial grooves are cross-arranged on the outer surface of the pick head.

[0010] Preferably, the diameter of the carbide cutter head is the same as the diameter of the thread groove, and the conical outer surface of the carbide cutter head is provided with an external thread that matches the internal thread of the thread groove;

[0011] The carbide cutter head is connected to the internal thread of the thread groove through the external thread, and the bottom end of the thread groove and the thread gap are filled with molten solder, so that the solder is cooled and solidified into one.

[0012] Preferably, the interiors of the plurality of axial grooves are welded with straight reinforcing ribs adapted thereto, and the outer surfaces of the bottom ends of the straight reinforcing ribs are integrally formed with arc-shaped reinforcing ribs;

[0013] The inner surface of the arc-shaped reinforcement rib is welded to the outer surface of the pick handle, and both sides of one end of the arc-shaped reinforcement rib at the connection between the bottom end away from the pick head and the top end of the pick handle are provided with arc surfaces.

[0014] Preferably, a plurality of grooves are evenly provided at the connection between the bottom end of the pick head and the top end of the pick shank, and the grooves are cross-arranged with the arc-shaped reinforcing ribs.

[0015] Preferably, the bottom end of the conical outer surface of the carbide cutter head and the top end of the outer surface of the pick head are both provided with a wear-resistant layer, and the wear-resistant layer is welded by argon arc welding with tungsten carbide electrodes on the wear-prone areas of the bottom end of the conical outer surface of the carbide cutter head and the top end of the outer surface of the pick head.

[0016] Preferably, the straight reinforcing ribs and the arc-shaped reinforcing ribs are both made of alloy material.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a reinforced pick with good wear resistance, which has the following beneficial effects:

[0019] 1. The reinforced pick with good wear resistance has enhanced the wear resistance of the pick head through the setting of the wear-resistant mechanism, effectively extending the service life of the pick body. Since the wear-resistant layer is formed by surfacing tungsten carbide electrodes using argon arc welding technology, the pick body and the carbide cutter head are preheated before welding. After welding, the pick body and the carbide cutter head are heat-insulated to prevent cracks from appearing on the welding surface, thereby greatly improving the strength and utilization rate of the wear-resistant layer, thereby increasing the wear resistance of the pick body and the carbide cutter head.

[0020] 2. The reinforced pick with good wear resistance has straight reinforcing ribs welded and fixed in several axial grooves, which then serve as axial reinforcing ribs for the pick head. Moreover, since the alloy material has a high hardness, the setting of such straight reinforcing ribs not only has excellent wear resistance and increases the protection of the carbide cutter head, but also has better impact resistance during use, while also improving the use efficiency and life of the pick body.

[0021] 3. The reinforced pick with good wear resistance has a larger welding area due to the threaded connection between the carbide cutter head and the pick head. At this time, the bonding force between the carbide cutter head and the pick head is a double superposition of welding force and fastening force, which greatly increases the connection strength between the two.

[0022] 4. The reinforced pick with good wear resistance has better rotation performance due to the cross setting of grooves and arc-shaped reinforcement ribs, which can ensure uniform wear in various geological environments and avoid the occurrence of uneven wear.

[0023] 5. The reinforced pick with good wear resistance increases the strength of the connection between the pick shank and the pick head due to the arrangement of straight reinforcement ribs and arc reinforcement ribs, thereby further improving the use efficiency and life of the pick body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the top view of the pick head of the utility model;

[0026] Figure 3 This is a side view of the structure of the connection between the straight reinforcement ribs and the arc reinforcement ribs of the utility model;

[0027] Figure 4 This is a side view of the structure of the pick handle of the utility model;

[0028] Figure 5 It is a schematic diagram of the overall planar front view structure of the utility model.

[0029] In the figure: 1. Pick handle; 2. Pick head; 3. Carbide tip; 4. Retaining ring groove; 5. Straight reinforcing rib; 6. Alloy bean; 7. Groove; 8. Arc-shaped reinforcing rib; 9. External thread; 10. Thread groove; 11. Axial groove; 12. Wear-resistant layer. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-5 The utility model provides a new technical solution: a reinforced pick with good wear resistance, including a pick body and a carbide cutter head 3, the pick body is composed of a pick shank 1 and a pick head 2, and the pick shank 1 and the pick head 2 are formed as one piece, a retaining spring groove 4 is provided on the outer surface of the end of the pick shank 1 away from the pick head 2, the pick head 2 is composed of a conical shape and a cylindrical shape, a thread groove 10 is provided at the center position of the end of the pick head 2 away from the pick shank 1, and a plurality of axial grooves 11 are evenly provided on the outer surface of the pick head 2;

[0032] Among them, several groups of wear-resistant mechanisms are evenly welded on the outer surface of the pick head 2, and each group of wear-resistant mechanisms is composed of three alloy beans 6. Several groups of wear-resistant mechanisms and several axial grooves 11 are cross-arranged on the outer surface of the pick head 2. Due to the setting of the wear-resistant mechanism, the wear resistance of the pick head is enhanced, and the service life of the pick body is effectively extended.

[0033] Furthermore, the diameter of the carbide cutter head 3 is the same as the diameter of the thread groove 10, and the conical outer surface of the carbide cutter head 3 is provided with an external thread 9 that matches the internal thread of the thread groove 10;

[0034] Among them, the carbide cutter head 3 is connected to the internal thread of the thread groove 10 through the external thread 9, and the molten solder fills the bottom end of the thread groove 10 and the thread gap, so that it is cold and solidified into one. Since the carbide cutter head 3 and the pick head 2 are connected by threads to increase the welding area, the bonding force between the carbide cutter head 3 and the pick head 2 is a double superposition of welding force and tightening force, which greatly increases the connection strength between the two.

[0035] Furthermore, the interiors of the plurality of axial grooves 11 are welded with straight reinforcing ribs 5 adapted thereto, and the outer surface of the bottom end of the straight reinforcing rib 5 is integrally formed with an arc-shaped reinforcing rib 8;

[0036] Among them, the inner surface of the arc-shaped reinforcement rib 8 is welded to the outer surface of the pick shank 1, and the arc-shaped reinforcement rib 8 is connected to the bottom end of the pick head 2 and the top end of the pick shank 1 on both sides. The arc-shaped reinforcement rib 8 is arranged with arc surfaces on both sides. Since straight reinforcement ribs 5 are welded and fixed in several axial grooves 11, the pick head 2 is played with the role of axial reinforcement ribs through several straight reinforcement ribs 5. And since the alloy material has a high hardness, the setting of such straight reinforcement ribs 5 not only has an excellent wear-resistant effect, increases the protection of the carbide cutter head 3, but also has a better impact resistance during use, while also improving the use efficiency and life of the pick body.

[0037] Furthermore, a number of grooves 7 are evenly arranged at the connection between the bottom end of the pick head 2 and the top end of the pick shank 1, and the grooves 7 and the arc-shaped reinforcement ribs 8 are cross-arranged. Due to the cross-arrangement of the grooves 7 and the arc-shaped reinforcement ribs 8, the pick shank 1 has better rotation performance, which can ensure uniform wear in a variety of geological environments and avoid the occurrence of uneven wear.

[0038] Furthermore, the number of the plurality of axial grooves 11 and the number of grooves 7 in the present invention are both eight.

[0039] Furthermore, a wear-resistant layer 12 is provided on the bottom end of the conical outer surface of the carbide cutter head 3 and the top end of the outer surface of the pick head 2. The wear-resistant layer 12 is welded to the bottom end of the conical outer surface of the carbide cutter head 3 and the top end of the outer surface of the pick head 2 in the easily worn area by argon arc welding with tungsten carbide electrodes. Since the wear-resistant layer 12 is formed by argon arc welding with tungsten carbide electrodes, the pick body and the carbide cutter head 3 are preheated before welding. After the welding is completed, the pick body and the carbide cutter head 3 are subjected to insulation measures, and no cracks will appear on the welding surface, thereby greatly improving the strength and utilization rate of the wear-resistant layer 12, thereby increasing the wear resistance of the pick body and the carbide cutter head 3.

[0040] Furthermore, the straight reinforcing ribs 5 and the arc-shaped reinforcing ribs 8 are both made of alloy materials, and the alloy material is a solid product with metallic properties made from two or more metal elements and non-metallic elements through a mixing, melting, cooling and solidification process. The alloy material usually has better properties than a single metal, such as higher strength, toughness, ductility, wear resistance and corrosion resistance.

[0041] Working principle: When using the reinforced pick with good wear resistance, the wear resistance of the pick head 2 is enhanced due to the setting of the wear-resistant mechanism, which effectively extends the service life of the pick body. Since the wear-resistant layer 12 is formed by surfacing tungsten carbide electrodes using argon arc welding technology, the pick body and the carbide cutter head 3 are preheated before welding. After welding, the pick body and the carbide cutter head 3 are heat-insulated to prevent cracks from appearing on the welding surface, thereby greatly improving the strength and utilization rate of the wear-resistant layer 12, thereby increasing the wear resistance of the pick body and the carbide cutter head 3.

[0042] Furthermore, since the straight reinforcing ribs 5 are welded and fixed in the plurality of axial grooves 11, the plurality of straight reinforcing ribs 5 serve as axial reinforcing ribs for the pick head 2. Moreover, since the alloy material has a high hardness, the provision of the straight reinforcing ribs 5 not only has an excellent wear-resistant effect and increases the protection of the carbide cutter head 3, but also has a better impact resistance during use, while also improving the use efficiency and life of the pick body.

[0043] Furthermore, since the carbide cutter head 3 and the pick head 2 are connected by threads to increase the welding area, the bonding force between the carbide cutter head 3 and the pick head 2 is a double superposition of the welding force and the fastening force, thereby greatly increasing the connection strength between the two.

[0044] Furthermore, due to the cross arrangement of the grooves 7 and the arc-shaped reinforcement ribs 8, the pick shank 1 has better rotation performance, can ensure uniform wear in various geological environments, and avoid the occurrence of uneven wear.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reinforced pick with good wear resistance, comprising a pick body and a carbide cutter head (3), wherein the pick body is composed of a pick shank (1) and a pick head (2), wherein the pick shank (1) and the pick head (2) are integrally formed, and a retaining spring groove (4) is provided on the outer surface of the end of the pick shank (1) away from the pick head (2), characterized in that: The pick head (2) is composed of a conical shape and a cylindrical shape. A thread groove (10) is provided at the center of one end of the pick head (2) away from the pick shank (1). A plurality of axial grooves (11) are evenly provided on the outer surface of the pick head (2). The outer surface of the pick head (2) is uniformly welded with several groups of wear-resistant mechanisms, and each group of wear-resistant mechanisms is composed of three alloy beans (6). The several groups of wear-resistant mechanisms and the several axial grooves (11) are cross-arranged on the outer surface of the pick head (2).

2. A reinforced pick with good wear resistance according to claim 1, characterized in that: The diameter of the carbide cutter head (3) is the same as the diameter of the thread groove (10), and an external thread (9) matching the internal thread of the thread groove (10) is provided on the conical outer surface of the carbide cutter head (3); The carbide tip (3) is connected to the internal thread of the thread groove (10) through the external thread (9), and the bottom end of the thread groove (10) and the thread gap are filled with molten solder to be solidified into one.

3. The reinforced pick with good wear resistance according to claim 1, characterized in that: A plurality of the axial grooves (11) are welded with corresponding straight reinforcing ribs (5) inside, and the outer surface of the bottom end of the straight reinforcing rib (5) is integrally formed with an arc-shaped reinforcing rib (8); The inner surface of the arc-shaped reinforcement rib (8) is welded to the outer surface of the pick shank (1), and both sides of the arc-shaped reinforcement rib (8) at the connection point between the bottom end away from the pick head (2) and the top end of the pick shank (1) are both provided with arc surfaces.

4. A reinforced pick with good wear resistance according to claim 3, characterized in that: A plurality of grooves (7) are evenly provided at the connection between the bottom end of the pick head (2) and the top end of the pick handle (1), and the grooves (7) and the arc-shaped reinforcing ribs (8) are arranged crosswise.

5. The reinforced pick with good wear resistance according to claim 1, characterized in that: The bottom end of the conical outer surface of the carbide cutter head (3) and the top end of the outer surface of the pick head (2) are both provided with a wear-resistant layer (12), and the wear-resistant layer (12) is welded to the wear-prone area of ​​the bottom end of the conical outer surface of the carbide cutter head (3) and the top end of the outer surface of the pick head (2) by argon arc welding with tungsten carbide welding rods.

6. The reinforced pick with good wear resistance according to claim 3, characterized in that: The straight reinforcing ribs (5) and the arc-shaped reinforcing ribs (8) are both made of alloy material.

Images