CN103331487B

CN103331487B - Hard alloy saw chain

Info

Publication number: CN103331487B
Application number: CN201310298233.XA
Authority: CN
Inventors: 林石; 吕钦渭
Original assignee: JINYUN DINGSHENGGONG CUTTER MANUFACTORY
Current assignee: Jinyun Dingsheng Tool Manufacturing Factory General Partnership
Priority date: 2013-07-17
Filing date: 2013-07-17
Publication date: 2016-05-11
Anticipated expiration: 2033-07-17
Also published as: CN103331487A

Abstract

The invention relates to a hard alloy saw chain of a chain saw, wherein a welding surface of a hard alloy tooth block and a cutting tooth is made into a cylindrical surface, and the arc radius of the cylindrical surface is 2-5 mm, preferably 2.5-4 mm. The tooth block is shaped like a quadrangular frustum pyramid, and the height of the inner side surface is smaller than that of the outer side surface. The flank of tooth piece is perpendicular to the indent, and interior concave angle 1 ~ 3. The intersection of the tooth crest surface and the tooth flank surface of the tooth block is made into a fillet, the tooth tip becomes a section of circular arc line, and the circular arc radius of the tooth tip is 0.2-0.8 mm, and the best is 0.3-0.4 mm. According to the invention, the hard alloy tooth block and the cutting tooth are welded together by adopting a butt welding method, local high-temperature tempering is carried out after the tooth block is welded, the joint strength of a welding seam is improved by 4 times compared with that of brazing, the welding seam is very firm, and the tooth can not be removed during sawing.

Description

A kind of carbide alloy saw chain

Technical field

The present invention relates to chain saw, relate in particular to a kind of carbide alloy saw chain of chain saw.

Background technology

Chain saw is mainly made up of prime mover, guide plate, saw chain and sprocket etc., and guide plate is anchored on the housing of prime moverUpper, saw chain rotation is moving around guide plate and the transhipment of chain crop rotation rotation. Traditional saw chain is with structural alloy steel or instrument steelMake, its Cutting teeth chair blade is an entirety, and land hardness is not too high, can only sawing timber, ice cube etc. is not too hardMaterial. Carbide alloy saw chain is a kind of saw chain that is welded with carbide alloy at the front end of the cutting teeth of Cutting teeth chair blade,The hardness of carbide alloy is very high, carbide alloy saw chain can sawing brick, non-ferrous metal, mild steel, containing nail timberDeng hard material. The hard-metal insert piece of existing carbide alloy saw chain be shaped as sheet or strip, and cutThe solder side of cutting tooth welding is 2-3 crossing plane, and after this profile of tooth welding, tooth piece easily splits or existsVery large welding interior stress, thereby hard-metal insert piece easily comes off when sawing. Existing carbide alloy saw chainHard-metal insert piece be soldered to cutting teeth front end with braze welding method, the weld strength of solder brazing is lower,The sawing resistance that is difficult to bear sawing brick, non-ferrous metal, mild steel, produces during containing hard materials such as nail timber,When sawing, weld seam easily ftractures, and use very short time hard-metal insert piece just comes off gradually.

Summary of the invention

Technical problem to be solved by this invention is just to provide block-shaped more excellent, the weld seam of a kind of hard-metal insert and walksBe difficult for falling the carbide alloy saw chain of tooth, long service life to more rationally, when high, the sawing of weld strength.

For solving the problems of the technologies described above, the present invention adopts following technical scheme: hard-metal insert piece of the present inventionMaking the face of cylinder with the solder side of cutting teeth welding, is the part on the face of cylinder, and this structure can make on tooth pieceThe welding tension being subject to drops to minimum, thereby avoids the weld crack of tooth piece. The arc radius on the face of cylinder is 2～5mm, best 2.5～4mm. For reducing sawing resistance, block-shaped approximate truncated rectangular pyramids, the medial surface height made of toothBe less than lateral surface height; The flank of tooth piece vertically concaves, 1～3 ° of interior re-entrant angle. For improving the strong of crownDegree, fillet is made in the crest top land of tooth piece and flank intersection, and crown becomes one section of circular arc line, crown circular arcRadius is 0.2～0.8mm, best 0.3～0.4mm.

The present invention adopts the method for butt welding that hard-metal insert piece and cutting teeth are welded together, the link of weld seamStrength ratio solder brazing improves 4 times, very firm, when sawing, can sealing-off not fall tooth. After tooth block welding, carry out officePortion's high tempering, eliminates the welding fragility of cutting teeth body after weld seam, cutting teeth body can prevent sawing timeBrittle fracture.

Brief description of the drawings

Below in conjunction with the drawings and specific embodiments, the invention will be further described:

Fig. 1 represents the front view of a segment standard tooth pitch carbide alloy saw chain;

Fig. 2 represents the top view of a segment standard tooth pitch carbide alloy saw chain;

Fig. 3 represents the front view of one section of solid matter tooth pitch carbide alloy saw chain;

Fig. 4 represents the top view of one section of solid matter tooth pitch carbide alloy saw chain;

Fig. 5 represents the front view of the right Cutting teeth chair blade of carbide alloy saw chain;

Fig. 6 represents the top view of the right Cutting teeth chair blade of carbide alloy saw chain;

Fig. 7 represents the left side view of the right Cutting teeth chair blade of carbide alloy saw chain;

Fig. 8 represents the front view of the left Cutting teeth chair blade of carbide alloy saw chain;

Fig. 9 represents the top view of the left Cutting teeth chair blade of carbide alloy saw chain;

Figure 10 represents the left side view of the left Cutting teeth chair blade of carbide alloy saw chain;

Figure 11 represents the left side view of left carbide button piece;

Figure 12 represents the front view of left carbide button piece;

Figure 13 represents the top view of left carbide button piece;

Figure 14 represents the rearview of left carbide button piece.

In figure: 1, left Cutting teeth chair blade; 2, right Cutting teeth chair blade; 3, chain rivet; 4, driver blade; 5, brace;6, left hard-metal insert piece; 7, right hard-metal insert piece; 8, cutting teeth; 9, limit material tooth; 10, riveted jointHole; 11, weld seam; 12, tooth piece medial surface height; 13, tooth piece lateral surface height; R1, the tooth piece face of cylinderArc radius; R2, tooth piece tip circular-arc radius; α, the vertical interior re-entrant angle of tooth piece flank.

Detailed description of the invention

In Fig. 1-Fig. 4, carbide alloy saw chain is by left Cutting teeth chair blade 1, right Cutting teeth chair blade 2, chain rivet 3, transmissionSheet 4 and brace 5 form, and full-height tooth is 4 pitches apart from the tooth pitch of carbide alloy saw chain, and solid matter tooth pitch is hardThe tooth pitch of matter alloy saw chain is 2 pitches, is welded with left hard-metal insert piece 6, right cut tooth on left Cutting teeth chair blade 1On chain sheet 2, be welded with right hard-metal insert piece 7. Left Cutting teeth chair blade 1 with structure and the shape of right Cutting teeth chair blade 2 isFull symmetric.

In Fig. 5-Figure 14, left Cutting teeth chair blade 1 and right Cutting teeth chair blade 2 are all expected tooth 9, are connected by cutting teeth 8, limitMeet portion and two riveted holes 10 form. Left hard-metal insert piece 6 and right hard-metal insert piece 7 and cutting teeth 8The solder side of welding is made the face of cylinder, is the part on the face of cylinder, and this structure can make left hard-metal insert piece 6And the welding tension being subject on right hard-metal insert piece 7 drop to minimum, thereby avoid left hard-metal insert piece 6And the weld crack of right hard-metal insert piece 7. The arc radius R1 on the face of cylinder is 2～5mm, best circular arc halfFootpath R1 is 2.5～4mm. For reducing sawing resistance, left hard-metal insert piece 6 and right hard-metal insert piece 7Shape is made approximate truncated rectangular pyramids, and tooth piece medial surface height 12 is less than tooth piece lateral surface height 13; Left carbide alloyThe flank of tooth piece 6 and right hard-metal insert piece 7 vertically concaves, and the vertical interior re-entrant angle α of tooth piece flank is1～3 °. For improving the intensity of crown, the crest top land of left hard-metal insert piece 6 and right hard-metal insert piece 7Make fillet with flank intersection, crown becomes one section of Circular Nose Cutting Edge line, and tooth piece tip circular-arc radius R2 is0.2～0.8mm, optimal teeth piece tip circular-arc radius R2 is 0.3～0.4mm.

The present invention adopts the method for butt welding by left hard-metal insert piece 6 and right hard-metal insert piece 7 and cutting teeth 8Weld together, the strength of connection of weld seam 11 improves 4 times than solder brazing, very firm, when sawing, can not take offTooth is fallen in weldering. After left hard-metal insert piece 6 and 7 welding of right hard-metal insert piece, carry out localized hyperthermia's tempering, disappearExcept the weld seam 11 welding fragility of cutting teeth 8 bodies below, can prevent sawing time, the fragility of cutting teeth body 8 is disconnectedSplit.

Claims

1. a carbide alloy saw chain, by left Cutting teeth chair blade (1), right Cutting teeth chair blade (2), chain rivet (3), driver blade (4) and brace (5)Composition, is welded with left hard-metal insert piece (6) on left Cutting teeth chair blade (1), be welded with right hard-metal insert piece (7) on right Cutting teeth chair blade (2),It is characterized in that: described left hard-metal insert piece (6) and right hard-metal insert piece (7) are made circle with the solder side of cutting teeth (8) weldingCylinder, is the part on the face of cylinder, the method that adopts butt welding by left hard-metal insert piece (6) and right hard-metal insert piece (7) with cutCut tooth (8) and weld together, the flank of left hard-metal insert piece (6) and right hard-metal insert piece (7) vertically concaves, tooth piece toothThe vertical interior re-entrant angle α in side is 1～3 °.

2. carbide alloy saw chain according to claim 1, is characterized in that: the arc radius R1 on the face of cylinder is 2～5mm.

3. carbide alloy saw chain according to claim 2, is characterized in that: the arc radius R1 on the described face of cylinder is 2.5～4mm。

4. carbide alloy saw chain according to claim 1, is characterized in that: left hard-metal insert piece (6) and right hard-metal insertFillet is made in crest top land and the flank intersection of piece (7), and crown becomes one section of Circular Nose Cutting Edge line, and tooth piece tip circular-arc radius R2 is0.2～0.8mm。

5. carbide alloy saw chain according to claim 4, is characterized in that: described tooth piece tip circular-arc radius R2 is 0.3～0.4mm。