CN205349236U - Spout type laser welding diamond bit at bottom of major -minor - Google Patents

Abstract

The utility model discloses a spout type laser welding diamond bit at bottom of major -minor, the mouth of pipe of its steel pipe base member is less than the body and forms the step, and coaxial welding reinforcement ring on the step forms the rivers ring cavity between the stiffening ring and the mouth of pipe and the step, and a plurality of drill bit matrixes weld on the terminal surface of the mouth of pipe and stiffening ring, block water the block welding between adjacent drill bit matrix, set up orifice of the vice end of the orifice of a plurality of main end that link up the step and multiunit in the rivers ring cavity, each orifice of main end apopore of piece of respectively blocking water of counterpointing, each group orifice of the vice end each drill bit matrix of counterpointing, the adoption is excelled in the cold press process and is made high strength and bore the pressed compact of laughing somebody to scorn, adopts two -direction pressing low -temperature vacuum hot -press approach to make the drill bit matrix, and laser welding drill bit matrix is in the mouth of pipe and reinforcement, and average tempering thermal treatment accomplishes follow -up finished product machine tooling after welding. The utility model discloses it is big that the area is erodeed in the cooling, effectively reduces the hot fatigue damage at welding seam position, has the prescription height, gets the characteristics that the core rate is high, longe -lived.

Description

Spray type laser weld diamond bit at the bottom of major-minor

Technical field

This utility model relates to diamond core bit, is specially spray type laser weld diamond bit at the bottom of a kind of major-minor.

Background technology:

Along with the day by day exhausted of shallow stratum mineral resources and the cost of labor that when the river rises the boat goes up, Exploration is further urgent to the new drill demand of " single hole list brill ", " high-efficiency long-life ".

The effective ways promoting bit life generally acknowledged in the industry at present are mainly lifting and bore tooth carcass height, but in current existing conventional intermediate frequency method for making and plating method for making, cannot well solve to promote diamond quality, carcass in brill the tooth same carcass strength of carcass height, carcass, with the contradiction between bond strength between matrix (hereinafter referred to as tire-film-substrate binding strength), technological innovation need to be carried out manufacture method and could fundamentally solve these contradiction.

Diamond bit belongs to sintered carbide tools, its carcass being mainly characterized by containing diamond particles is connected with one end of steel pipe matrix (with attachment structure), steel pipe matrix realizes, by being mounted directly or indirectly on pressure-swing equipment to carry out grinding drill and taking, the boring means crept into, and common manufacturing method mainly has Median frequency sintering method, resistance heat sintering process, galvanoplastic etc..

But being as increasing of work carcass, above manufacture method all cannot effectively ensure drill quality on abrasive particle quality, carcass-substrate combinating strength in carcass strength, carcass, which has limited the development of diamond bit.

Utility model content

For the deficiencies in the prior art, technical problem to be solved in the utility model is to propose a kind of to be applicable to middle low power laser welding machine and mould affinity is good, spray type laser weld diamond bit at the bottom of can effectively promoting abrasive particle quality in the carcass strength of heavy wall height matrix drill bits, carcass, carcass-substrate combinating strength and creeping into the major-minor of cooling performance.

Can solve the problem that spray type laser weld diamond bit at the bottom of the major-minor of above-mentioned technical problem, its technical scheme includes bit matrix and steel pipe matrix, form step less than pipe diameter the difference is that the nozzle diameter of described steel pipe matrix, on described step, coaxial welding external diameter is consistent with pipe diameter, the reinforcing ring of highly concordant mouth of pipe end face, semi-enclosed current ring cavity is formed between the internal diameter of described reinforcing ring and the external diameter of the mouth of pipe and step, multiple bit matrix circumference uniform distributions are welded on the end face of the mouth of pipe and reinforcing ring, the mouth of pipe between adjacent bit matrix and on the end face of reinforcing ring welding block water block；Set out spray orifice of the multiple main end and the secondary end spray orifice of many groups of through step corresponding to current ring cavity position, the position of spray orifice of each main end is corresponding to the apopore of the block that respectively blocks water, and the position of the secondary end spray orifice of each group is corresponding to the bottom of each bit matrix.

Aperture for avoiding spray orifice of the main end is too small and causes flow of cooling water smooth, and the diameter of spray orifice of each main end can process the width more than current ring cavity, respectively organize the diameter of secondary end spray orifice then≤the width processing of current ring cavity.

For being effectively ensured the intensity of reinforcing ring, described shoulder height (i.e. the axial length of reinforcing ring) is designed as 3mm～8mm.

The size of visual bit matrix, is chosen as 2～5 by the spray orifice in spray orifice at the bottom of each group of pair.

The wall thickness of described steel pipe matrix is designed as and consistency of thickness and the thickness range of reinforcing ring select between 3mm～10mm, and the value of thickness is depending on the specification size of diamond bit.

The beneficial effects of the utility model:

1, this utility model solves the contradictory problems in the same carcass strength of carcass height, carcass between diamond granular mass, tire film-substrate binding strength, and this patent is low for equipment requirements, good forming effect；Relatively hot pressing sintering method mould recycling rate of waterused is high, reduces production cost, can incorporate pipelining production operation and promote productivity ratio；Relatively galvanoplastic non-pollution discharge, more energy efficient environmental protection.

2, this utility model self carcass densification is high, diamond particles quality heat waste is little and has spray orifice intercooling cycle water route at the bottom of the major-minor of unique design；Spray orifice intercooling cycle water route cooling at the bottom of this major-minor washes away area coverage greatly, can reach bit matrix full-covering type and wash away cooling effect；And cooling can be carried out wash away in butt welded seam position from inside to outside in actual drilling process, can effectively reduce the Thermal Fatigue Damage at weld seam position when creeping into, promote the safe application performance of high matrix diamond drill.

The features such as 3, this utility model diamond bit has timeliness height, quality stability is good, core-taking rate is high, life-span length.

4, this utility model manufacture method to laser welding apparatus require relatively low, steel pipe matrix, reinforcing ring matched design under, middle low power laser welding equipment can be competent at, and equipment cost is low.

Accompanying drawing explanation

Fig. 1 is the perspective view of a kind of embodiment of this utility model.

Fig. 2 is the front cross-section view of Fig. 1.

Fig. 3 is the perspective view of steel pipe matrix in Fig. 1.

Fig. 4 is the top view of Fig. 3.

Figure number identifies: 1, bit matrix；2, steel pipe matrix；2-1, the mouth of pipe；2-2, body；3, reinforcing ring；4, block water block；4-1, apopore；5, spray orifice of the main end；6, secondary end spray orifice；7, current ring cavity.

Detailed description of the invention

Below in conjunction with accompanying drawing illustrated embodiment, the technical solution of the utility model is described further.

Spray type laser weld diamond bit at the bottom of this utility model major-minor includes six bit matrixes, 2, reinforcing ring 3 of 1, steel pipe matrix and six blocks 4 that block water.

The upper end mouth of pipe 2-1 of described steel pipe matrix 2 (wall thickness 3mm～10mm) forms step (axial height 3mm～8mm) less than body 2-2 between mouth of pipe 2-1 and body 2-2, the external diameter of described reinforcing ring 3 diameter equal to body 2-2, highly concordant mouth of pipe 2-1, reinforcing ring 3 on step with mouth of pipe 2-1 coaxial package and with body 2-2 laser weld, reinforcing ring 3, mouth of pipe 2-1, semiclosed current ring cavity 7 is formed between step three, on step, spray orifice 6 (aperture is between 2mm～4mm) at the bottom of spray orifice 5 of through six the main end (aperture is between 5mm～7mm) and six groups of pairs is offered corresponding to current ring cavity 7 position, often the spray orifice of the secondary end spray orifice 6 of group is set to three, the aperture of spray orifice of the described main end 5 is more than the radial width of current ring cavity 7, the aperture of described secondary end spray orifice 6 is less than the radial width of current ring cavity 7, such as Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4.

Six bit matrix 1 circumference uniform distribution laser weld (cover the current ring cavity 7 of corresponding position) on the end face of reinforcing ring 3 and mouth of pipe 2-1, welding position bottom each bit matrix 1 corresponds respectively to spray orifice 6 at the bottom of each group of pair, six blocks 4 (setting out water hole 4-1 on it in advance) that block water are respectively welded on the end face of the reinforcing ring 3 between adjacent bit matrix 1 and mouth of pipe 2-1 (covering the current ring cavity 7 of corresponding position), respectively the block water position of block 4 corresponds respectively to spray orifice of each main end 5, the apopore 4-1 of block 4 of making to block water communicates with corresponding spray orifice of the main end 5, such as Fig. 1, shown in Fig. 2.

The manufacture method of spray type laser weld diamond bit at the bottom of described major-minor, its processing step is:

1, by powder, diamond particles by the mixed merga pass mixing equipment Homogeneous phase mixing of proportioning, proportioning is mixed with into work material, Transition Materials, three kinds of powders of welding material.

2, each proportioning mixed powder is loaded bore the compression mould be made by high intensity cold compacting and bore, containing working lining, transition zone, the fine and close of weld layer three composition of layer, pressed compact of laughing somebody to scorn of laughing somebody to scorn.

3, pressed compact of being laughed somebody to scorn by brill loads in graphite jig and is bit matrix 1 (can be independent monodentate or the carcass ring containing several monodentates) by cryogenic vacuum Thermocompressed sintering and forming.

4, the mouth of pipe 2-1 of shrinkage or hot expansion method processing and fabricating steel pipe matrix 5 upper end is adopted; the body 2-2 of described mouth of pipe 2-1 and steel pipe matrix 2 forms step; the reinforcing ring 3 of machining manufactured size coupling; by reinforcing ring 3 on step with mouth of pipe 2-1 coaxial package and weld with body 2-2 (adopt Laser Welding, friction welding (FW), submerged-arc welding, protective gas filler weldering and other welding manners); corresponding to current ring cavity 7 position formed between reinforcing ring 3 and mouth of pipe 2-1, on step, process upper and lower through spray orifice of the main end 5 and secondary end spray orifice 6.

5, being respectively welded bit matrix 1 on the end face of reinforcing ring 3 and mouth of pipe 2-1 by laser weld mode, (laser welding apparatus output sets between 1800～5000KW, single weld penetration is set as 3mm～10mm, accumulative weld penetration is set as 6mm～20mm, separate type laser weld can effectively reduce the welding heat damage to bit matrix 1), reinforcing ring 3 between adjacent bit matrix 1 and on the mouth of pipe 2-1 end face welding block water block 4, the apopore 4-1 position of the block 4 that blocks water after welding corresponds to spray orifice of the main end 5, the bottom position of the bit matrix 1 after welding is corresponding to secondary end spray orifice 6.

6, after completing welding, diamond bit entirety is inserted in Muffle furnace and carry out average tempering heat treatment (heating-up temperature is set between 600 DEG C～800 DEG C, temperature retention time looked steel pipe matrix 2 wall thickness control between 0.5～1.5 hour, come out of the stove after cooling to 400 DEG C with the furnace air cooling or oil is quickly cooled to room temperature by invading to steep).

7, after heat treatment completes, carry out subsequent mechanical polish and finished productization processes.

Claims (5)

1. spray type laser weld diamond bit at the bottom of major-minor, including bit matrix (1) and steel pipe matrix (2), it is characterized in that: the mouth of pipe (2-1) diameter of described steel pipe matrix (2) forms step less than body (2-2) diameter, on described step, coaxial welding external diameter is consistent with body (2-2) diameter, the reinforcing ring (3) of the highly concordant mouth of pipe (2-1) end face, semi-enclosed current ring cavity (7) is formed between internal diameter and external diameter and the step of the mouth of pipe (2-1) of described reinforcing ring (3), multiple bit matrixes (1) circumference uniform distribution is welded on the end face of the mouth of pipe (2-1) and reinforcing ring (3), the mouth of pipe (2-1) between adjacent bit matrix (1) and on the end face of reinforcing ring (3) welding block water block (4)；Spray orifice of the multiple main end (5) and the secondary end spray orifice (6) of many groups of through step is set out corresponding to current ring cavity (7) position, the position of each spray orifice of main end (5) is corresponding to the apopore (4-1) of block (4) that respectively block water, the corresponding bottom in each bit matrix (1), position of the secondary end spray orifice (6) of each group.

2. spray type laser weld diamond bit at the bottom of major-minor according to claim 1, it is characterized in that: the diameter of each spray orifice of main end (5) is more than the width of current ring cavity (7), the width of the diameter≤current ring cavity (7) of the secondary end spray orifice (6) of each group.

3. spray type laser weld diamond bit at the bottom of major-minor according to claim 1, it is characterised in that: described shoulder height is 3mm～8mm.

4. spray type laser weld diamond bit at the bottom of major-minor according to claim 1, it is characterised in that: the spray orifice in the secondary end spray orifice (6) of each group is 2～5.

5. spray type laser weld diamond bit at the bottom of major-minor according to claim 1, it is characterised in that: the wall thickness of described steel pipe matrix (2) is 3mm～10mm with the consistency of thickness of reinforcing ring (3) and thickness range.