CN105537584B - Alloy tup, the mold and method for preparing alloy tup - Google Patents
Alloy tup, the mold and method for preparing alloy tup Download PDFInfo
- Publication number
- CN105537584B CN105537584B CN201511030174.3A CN201511030174A CN105537584B CN 105537584 B CN105537584 B CN 105537584B CN 201511030174 A CN201511030174 A CN 201511030174A CN 105537584 B CN105537584 B CN 105537584B
- Authority
- CN
- China
- Prior art keywords
- alloy
- tup
- alloy tup
- pedestal
- mounting portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/002—Tools other than cutting tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Abstract
The mold and method that the present invention discloses a kind of alloy tup, prepares alloy tup, the alloy tup include：Hammer body, on the direction that the second surface from the first surface of the hammer body to the hammer body extends, it is equipped with mounting hole and the anti-deformation hole across the hammer body successively, wherein, the first surface is opposite with the second surface, the axle center of the mounting hole is overlapped with the axle center in the anti-deformation hole, and the inner wall of the mounting hole is equipped with screw thread, and the anti-deformation hole when the alloy tup is molded for ensuring that the mounting hole is formed as preset shape.The present invention also provides a kind of molds and method preparing above-mentioned alloy tup.The alloy tup of the present invention, prepare the mold of alloy tup and method have many advantages, such as manufacturing process is simple, wearability is good, it is firm it is good, in equipment when working efficiency it is longer than 3 times of prior art raising or more, low production cost and service life.
Description
Technical field
The present invention relates to wear-resistant metal material field more particularly to a kind of alloy tup, prepare alloy tup mold and
Method.
Background technology
As hammer mill is widely used in the industries such as building materials, mine, metallurgy, electric power, cement and chemical industry, wherein tup
Stress is complicated at work, bears the repeated actions such as high speed impact, extruding, shearing, strong friction, working condition is severe, belongs to
Crucial accessory, year consume a large amount of metal materials.From operating mode requirement, the end wear position of tup, it is desirable that very high
Hardness, shock resistance is good, and wear-resisting property is good；Tup shank installation position, it is desirable that preferable toughness, use is not broken, together
When also have certain hardness.In recent years, through operating mode using proving, the larger medium and small tup of dosage uses material to be single
Potassium steel, due to wearing no resistance, tup wear extent is big, and broken material efficiency is low, causes high energy consumption low output, perplexs enterprise always
Rapid economic development.The wear-resisting property of tup is also once improved with martensite steel in the industry, due to poor toughness, brittleness is big, using often
Phenomenon of rupture occurs, operating mode uses seldom；Rich chromium cast iron hardness is fine, is good wear-resistant material, easily disconnected since brittleness is very big
It splits, is not yet used as hammer head material.Currently, manufacturing medium and small tup, comprehensive mechanical property using double metallic composite material both at home and abroad
Reach requirement, disclosure satisfy that different operating mode use environments, is cast boundary and is known as forth generation wear-resistant material.Bimetallic compound hammer
There are mainly two types of techniques for the complex method of head：Liquid-solid bimetallic is compound and liquid-liquid bimetallic is compound.Wherein liquid-solid bimetallic is multiple
There are mechanical bonds for the compound interface of conjunction tup, and bond strength is low, are also easy to produce crackle, chip off-falling and fracture defect, and use is dangerous,
And the compound interface of liquid-liquid Double-metal composite hammer is metallurgical binding, bond strength is high, not only wear-resisting but also safe in use, liquid-
The preparation method of liquid Double-metal composite hammer generally uses phenolic sand molding technique, the tup mounting hole of the technique to borrow both at home and abroad
Fuse is helped to be formed, moulding needs more sandbox, is equipped with tooling auxiliary tool, and operating procedure is complicated, low for equipment work efficiency, raw
It is higher to produce cost.
In addition, tup wearability in the prior art and impact flexibility are generally poor, even tup and sand making machine etc.
The combination of equipment is bonded using super glue, and the combination between tup and sand making machine is easy to fall off built on the sand, even shadow when serious
Ring safety in production.
In addition, when making tup, this field for the fixation hole machined of tup be typically after semi-finished product are made in tup,
Mounting hole is manually dug out using tool in the hammer body of tup, material is not only wasted, but also time-consuming and laborious, considerably increases technique
Complexity.
Invention content
The present invention is based on above one or more problem, the mold for providing a kind of alloy tup, preparing alloy tup
And method, it is complicated to solve tup manufacturing process existing in the prior art, it wears no resistance, is firm poor, for work in equipment
It is low to make efficiency, and service life is not grown and the problems such as production cost is high.
A kind of alloy tup, wherein the alloy tup includes：Hammer body, in the first surface from the hammer body to described
On the direction that the second surface of hammer body extends, it is equipped with mounting hole and the anti-deformation hole across the hammer body successively, wherein described the
One surface is opposite with the second surface, and the axle center of the mounting hole is overlapped with the axle center in the anti-deformation hole, the mounting hole
Inner wall be equipped with screw thread, the anti-deformation hole when the alloy tup is molded for ensuring that the mounting hole is formed as preset
Shape.
Preferably, the hammer body is in a rectangular parallelepiped shape, and two surfaces of the arbitrary neighborhood of the hammer body pass through rounded corner transition
Portion connects.
Preferably, the aperture ratio of the aperture in the anti-deformation hole and the mounting hole is α, 1/4≤α≤1.
The mold such as preceding any one of them alloy tup is prepared the present invention also provides a kind of, wherein the mold includes：
Die body, upper punch, pedestal, core bar, threaded rod, the pedestal are equipped with the through-hole for installing the threaded rod, and the threaded rod includes
Screw thread bar body and mounting portion, the mounting portion are adapted to the through-hole, and the screw thread bar body protrudes from the pedestal, institute
It states mounting portion and is equipped with the groove being open towards pedestal bottom surface direction, the separate institute of the groove to the screw thread bar body
It states mounting portion one end and is equipped with core bore, the core bar passes through the core bore against the bottom of the groove, and the die body is equipped with hollow
Portion, the hollow portion is interior to accommodate the pedestal and the upper punch, and the upper punch corresponds to the core bar and is equipped with perforation, described
Filled with the alloy powder for being used to prepare the alloy tup between pedestal and the upper punch.
Preferably, the die body is more than the screw thread bar body from the peace from the pedestal to the thickness of the upper punch
Length far from described mounting portion one end of the dress portion to the screw thread bar body.
Preferably, the screw thread bar body is integrally formed with the mounting portion, and the screw thread bar body is close to described
Diameter is gradually reduced when one end of mounting portion extends to the extreme direction far from the mounting portion.
Preferably, limited part is equipped with above the die body, for making the upper punch be moved when moving along predetermined direction.
The present invention also provides a kind of methods preparing foregoing alloy tup, wherein the preparation method include with
Lower step：
S1 provides a mold for preparing the alloy tup, and the mold includes：Die body, upper punch, pedestal, core bar, spiral shell
Rasp bar, wherein the threaded rod includes screw thread bar body and mounting portion, and the mounting portion is disposed an outwardly facing the pedestal bottom surface
The groove of direction opening；
The mounting portion of the threaded rod is inserted into the through-hole of the pedestal by S2, then installs the core bar to the threaded rod
Core bore, the die body, which is set in outside the pedestal, makes the pedestal be located in the hollow portion of the die body；
S3 fills pretreated alloy powder to the hollow portion, and the alloy powder includes cobalt, ramet, carbonization
Tungsten, wherein be calculated by mass percentage, the content of cobalt is 9%~11%, and the content of ramet is 0.4%~0.6%, surplus
For tungsten carbide；
The perforation of the upper punch across the core bar, is made the upper punch be installed to the alloyed powder in the die body by S4
Last top；
S5 is pressed into alloy tup green compact；
S6 dismantles the mold, takes out the alloy tup green compact；
S7 is by the alloy tup green compact pressure sintering.
Preferably, the pretreated alloy powder of filling in the step S3 is to the die body, wherein the pretreatment
It specifically includes：
S31 choose production state granularity be 20~35 μm, grinding state granularity is 3.2~6.0 μm, tap density be 7.0~
10.0g/cm3, oxygen content≤0.02% and total carbon content 6.0%~6.2% tungsten carbide and apparent density be 0.5~
1.5g/cm3, average particle size be 0.8~2.0 μm, the intermediate value D50 of size distribution is in 20 μm of cobalts below；
S32 is ground：Alloy powder and abrasive media that ramet, step the S31 tungsten carbide chosen are constituted with cobalt and
Absolute ethyl alcohol is mixed by predetermined ratio, wherein the abrasive media includes atoleine, and the predetermined ratio is by weight such as
Under：Alloy powder: abrasive media: absolute ethyl alcohol=50: 1: 15, then press ratio of grinding media to material 1: 2.5~5.0, the wet-milling in ball mill
20~30 hours, mixture is obtained using spray drying；
S33 degummings：The degumming in a dewaxing furnace, degumming temperature are 450~550 DEG C, and soaking time is 100~200min；
The step S7 is specifically included：The alloy tup green compact are placed in a sintering furnace, are carried out under hydrogen protection
Sintering, sintering temperature are 1300 to 1500 degrees Celsius, sintering time 1 to 3 hours, and are pressurized to 6~8MPa.
Preferably, the step S6 specifically includes following steps：
S61 applies a thrust to the upper punch, and the pedestal, core bar, threaded hole and the alloy tup are given birth to
Base is released outside the die body；
S62 takes out the core bar from the core bore；
S63 dismantles the threaded rod using extracting tool, and the extracting tool is equipped with dismounting compatible with the groove
Bar back-outs the threaded rod by rotating the removal rod counterclockwise from the alloy tup green compact；
S64 takes out the alloy tup green compact.
The alloy tup of the present invention prepares the mold and method of alloy tup, has manufacturing process simple, wearability is good,
It is firm good, 3 times or more are improved than the prior art, for working efficiency in equipment the advantages that low production cost, service life is long.
Description of the drawings
Fig. 1 is structural schematic diagram of the alloy tup of better embodiment of the present invention under the first visual angle.
Fig. 2 is structural schematic diagram of the alloy tup of better embodiment of the present invention under the second visual angle.
Fig. 3 is the die body structural schematic diagram of the mold for preparing alloy tup of better embodiment of the present invention.
Fig. 4 is the upper punch structural schematic diagram of the mold for preparing alloy tup of better embodiment of the present invention.
Fig. 5 is after the pedestal of the mold for preparing alloy tup of better embodiment of the present invention assembles threaded rod and core bar
Structural schematic diagram.
Fig. 6 is the structural schematic diagram of the threaded rod of the mold for preparing alloy tup of better embodiment of the present invention.
Fig. 7 is structural representation of the mold for preparing alloy tup of better embodiment of the present invention when preparing alloy tup
Figure.
Fig. 8 is the flow diagram of the method for preparing alloy tup of better embodiment of the present invention.
Fig. 9 is the idiographic flow schematic diagram of step S6 in Fig. 8.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and examples.It should be noted that if do not conflicted, this hair
Each feature in bright embodiment and embodiment can be combined with each other, within protection scope of the present invention.
It is structure of the alloy tup of better embodiment of the present invention under the first visual angle please also refer to Fig. 1, Fig. 2, Fig. 1
Schematic diagram.Fig. 2 is structural schematic diagram of the alloy tup of better embodiment of the present invention under the second visual angle.It needs to illustrate
It is that the first visual angle here differs 180 degree with the second visual angle.As depicted in figs. 1 and 2, in the conjunction of better embodiment of the present invention
Golden tup can be applied in sand making machine (or hammer mill) equipment, the critical component as rubble.The alloy tup packet
It includes：Hammer body 20 is equipped with successively on the direction extended from the first surface of the hammer body 20 to the second surface of the hammer body 20
Across mounting hole 22a, 22b and anti-deformation hole 21a, 21b of the hammer body 20, wherein the first surface and second table
Face is opposite, and the axle center of described mounting hole 22a, 22b are overlapped with the axle center of described anti-deformation hole 21a, 21b, the mounting hole 22a,
The inner wall of 22b is equipped with screw thread, and described anti-deformation hole 21a, 21b when the alloy tup is molded for ensuring the mounting hole
22a, 22b are formed as preset shape.
Mounting hole and anti-deformation hole is arranged by using alloy in the alloy tup of the present invention, on the one hand ensure that conjunction
Golden tup has manufacturing process simple, the good advantage of wearability, and on the other hand, stability is good when in for equipment, while work
Make efficiency and improves 3 times or more than the prior art.Also it is exactly to have many advantages, such as that low production cost, service life are long.
In a preferred embodiment, the hammer body 20 in a rectangular parallelepiped shape, and the arbitrary neighborhood of the hammer body 20 two
Surface is connected by rounded corner transition part 23.Preferably, the corresponding central angle of circular arc of the rounded corner transition part 23 is 90 degree,
Certainly 90 degree are not limited to, can also be other angles, such as 60 degree or 45 degree.Due to being provided with rounded corner transition part, this
Sample makes alloy tup be less likely to be damaged during with other hard material such as stone impacts.
Fig. 3, Fig. 4, Fig. 5 and Fig. 6 are referred to, Fig. 3 is the mold for preparing alloy tup of better embodiment of the present invention
Die body structural schematic diagram；Fig. 4 is the upper punch structural schematic diagram of the mold for preparing alloy tup of better embodiment of the present invention；
The pedestal assembly threaded rod and the structural representation after core bar that Fig. 5 is the mold for preparing alloy tup of better embodiment of the present invention
Figure；Fig. 6 is the structural schematic diagram of the threaded rod of the mold for preparing alloy tup of better embodiment of the present invention.As Fig. 3, Fig. 4,
Shown in Fig. 5 and Fig. 6, the present invention also provides a kind of mold preparing foregoing alloy tup, which includes：Die body 30,
Upper punch 40,15, two core bars 11 of pedestal and 12, two threaded rods 13,14, the pedestal 15, which is equipped with, installs the threaded rod
13,14 through-hole (not shown), threaded rod 14 include screw thread bar body 142 and mounting portion 141, the mounting portion 141 with
Through-hole is adapted to, and the screw thread bar body 142 protrudes from the pedestal 15, and the mounting portion 141 is equipped with towards the pedestal 15
The groove 16,17 of bottom surface direction (opposite side of side where pedestal is equipped with screw thread bar body) opening, the groove 16,17
Quantity is corresponding with the quantity of threaded rod.After alloy tup compression moulding, an extracting tool is stuck in spiral shell (such as dismounting handle)
It in the groove 16,17 of rasp bar bottom, rotates counterclockwise, threaded rod can be disassembled and (back-outed).Due to being equipped with groove, can make
It obtains after the mounting hole for making alloy tup, so that threaded rod is safely exited the alloy tup by groove 16,17
Screw thread on mounting hole inner wall is indeformable, to preferably ensure that the alloy tup is being installed to equipment (such as sand processed
Machine) on when, mounting hole can well with the associated components of equipment coordinate so that the alloy tup firmly fixes, will not be light
It is easy to fall off.The groove 16,17 is equipped with core bore 143, core bore to the screw thread bar body 13,14 far from described mounting portion one end
143 parts are in mounting portion, and another part is to be located at the intrinsic through-core hole of threaded rod, and the core bar 11,12 passes through described
Core bore 143 is against the bottom of the groove 16.Core bar 11,12 coordinates with core bore so for preparing alloy hammer in compacting alloy powder
When first-born base, by the effect of core bar, make the alloy powder uniform force in die body, and not will produce when threaded rod stress slight
It swings, evenly, fixed hole shape is also more regular for the density of the screw thread of the mounting hole inner wall formed in this way.Compared with the prior art
In can only using manual type formed mounting hole inner thread by the way of, the present invention by mold design realize one-pass molding, greatly
The big complexity and time cost for alleviating technique.
The die body 30 is equipped with hollow portion 31, and the pedestal 15 and the upper punch 40, institute are accommodated in the hollow portion 31
It states upper punch 40 and corresponds to the core bar 11,12 equipped with perforation, be filled with and be used between the pedestal 15 and the upper punch 40
Prepare the alloy powder of the alloy tup.The upper punch 40 corresponds to the core bar 11,12 and is equipped with perforation 41, and the perforation can
For being limited to the core bar 11,12, core bar 11,12 positions is set to fix, to ensure threaded rod uniform force.The die body 40
Between the pedestal 15 and the upper punch 40.
Continuing with referring to Fig. 6, in a specific embodiment, for the threaded rod 13 of the present invention, specifically include：Installation
Portion 134, screw thread bar body 132 and the groove 17 positioned at mounting portion bottom end.Exist in screw thread bar body 132 and mounting portion 134
One contact surface 133, the mounting portion 134 are cylinder, and the section of rectangular in cross-section, the screw thread bar body 132 is in truncated cone-shaped,
The screw thread bar body 132 is equipped with arcwall face 131 at the top of one end far from the mounting portion 134, which is flat
Face, both sides are arc-shaped, and the mounting hole to be formed can be made to have preferable fixed function.In addition, in mounting portion 134 and threaded rod sheet
Body 132 is equipped with core bore 135, and projection of the core bore 135 in 17 bottom surface of groove is located in the bottom surface of the groove 17.That is, core
The radius in hole 135 is less than the radius of cylinder shape groove.Preferably, core bore 135 and groove 17 are in the longitudinal direction (i.e. from mounting portion bottom
Portion is toward on the direction of contact surface 133) axial line overlap, and coincide positioned at the axis of mounting portion, the axis of screw thread bar body.
The mold for preparing alloy tup of the present invention, have it is simple in structure, it is the alloy tup forming of making, not variable
Shape, the advantage that of low cost and installation is simple.
Further, the aperture ratio of the aperture of described anti-deformation hole 21a, 21b and described mounting hole 22a, 22b are α,
1/4≤α≤1, most preferably α=1/2, the size of anti-deformation hole 21a, 21b are just the half of mounting hole size at this time, due to two
The person center of circle overlaps, first, alloy tup can allow the transmission of pressure evenly in pressing process, prevents alloy tup from deforming；Two
It is to prevent from upper punch from generating offset in pressing process with threaded rod mounting hole (threaded hole) is caused to deform.
Further, the die body 40 is more than the screw thread bar body from the pedestal 15 to the thickness of the upper punch 40
142 length far from 141 one end of the mounting portion from the mounting portion 141 to the screw thread bar body 142.That is,
Alloy tup is also formed with anti-deformation hole in addition to forming corresponding with screw thread bar body mounting hole, and the length in anti-deformation hole can be with
Foundation needs to set.In addition, when actually using the alloy tup, steel nail etc. may be used and seal the anti-deformation hole
Firmly.
Further, the screw thread bar body 142 is integrally formed with the mounting portion 141, and the screw thread bar body 142
When extending to the extreme direction far from the mounting portion 141 close to one end of the mounting portion 141, diameter is gradually reduced.This
Sample is convenient for when dismantling threaded rod, and the threaded rod is easy to exit from the through-hole of pedestal, is also exactly that the mounting hole for preparing is easy
In making the connecting component in the equipment such as sand making machine be easily inserted, can preferably fix.
Fig. 7 is referred to, Fig. 7 is the mold for preparing alloy tup of better embodiment of the present invention when preparing alloy tup
Structural schematic diagram.As shown in fig. 7, the mold for preparing alloy tup of better embodiment of the present invention still further comprises and is located at
Limited part 60 above the die body is particularly limitation for making the upper punch be moved when moving along predetermined direction
Upper punch 40 is not in dislocation in punching press.The shape of limited part 60 is corresponding with the shape of die body, when die body shape is in square
When body, the limited part can also be corresponding rectangle frame, have the hollow of corresponding upper stamping size in frame, at this time, it is assumed that limit
The long side length of product is a1, and width edge length b1, die body long side corresponding with the long side of limited part is a2, with limited part phase
The length of corresponding broadside is b2, and the long side of corresponding hollow portion is a3, broadside b3, then a3 ＜ a1 ＜ a2, b3 ＜ b1 ＜
b2.In addition, limited part 60 can also be two rectangular blocks positioned at upper stamping opposite sides on die body, two rectangles
The spacing d of block, when two rectangular blocks are located in die body long side, then a3 ＜ d ＜ a2, when two rectangular blocks are located on die body short side
When, b3 ＜ d ＜ b2.In addition, it should be noted that, pedestal 15 and upper punch 40 are respectively positioned in the hollow portion of the die body 30, should
Pedestal 15 is adapted with the size of upper punch 40 with hollow portion size.When preparing alloy tup, upper punch 40 is in outer force effect
Under, alloy powder 50 is constantly suppressed, core bar 12 passes through core bore against the bottom to the groove 14, and the separate institute of core bar 12
The one end for stating pedestal is inserted into again in the perforation of the upper punch 40, in this way, the position of core bar 12 is fixed, threaded rod is by upper punching
It is dispersible to give core bar 12 when head pushes the pressure to come, so that threaded rod uniform force, the alloy powder around threaded rod
Density Distribution is uniform, the mounting hole regular shape of formation, and the screw thread of mounting hole inner wall meets production requirement.
Fig. 8 is referred to, Fig. 8 is the flow diagram of the method for preparing alloy tup of better embodiment of the present invention.Such as
Shown in Fig. 8, the present invention also provides a kind of methods preparing foregoing alloy tup, wherein the preparation method include with
Lower step：
S1 provides a mold for preparing the alloy tup, and the mold includes：Die body, upper punch, pedestal, core bar, spiral shell
Rasp bar, wherein the threaded rod includes screw thread bar body and mounting portion, and the mounting portion is disposed an outwardly facing the pedestal bottom surface
The groove of direction opening；Detailed construction in relation to mold in the narration of Fig. 3 to Fig. 7 above to having a detailed description, herein not
It repeats again.
The mounting portion of the threaded rod is inserted into the through-hole of the pedestal by S2, then installs the core bar to the threaded rod
Core bore, the die body, which is set in outside the pedestal, makes the pedestal be located in the hollow portion of the die body；
S3 fills pretreated alloy powder to the hollow portion, and the alloy powder includes cobalt, ramet, carbonization
Tungsten, wherein be calculated by mass percentage, the content of cobalt is 9%~11%, and the content of ramet is 0.4%~0.6%, surplus
For tungsten carbide；
The perforation of the upper punch across the core bar, is made the upper punch be installed to the alloyed powder in the die body by S4
Last top；
S5 is pressed into alloy tup green compact；
S6 dismantles the mold, takes out the alloy tup green compact；
S7 is by the alloy tup green compact pressure sintering.
The method for preparing alloy tup of the present invention not only makes alloy tup one-pass molding due to using above-mentioned steps,
Moulding process is simple, and has simple in structure, the alloy hammer of making using the tup prepared prepared by the method for alloy tup
Head forming is unlikely to deform, the advantage that of low cost and installation is simple.Also by the effect of core bar, make the alloy in die body
Powder uniform force, and not will produce slight oscillatory when threaded rod stress, the density of the screw thread of the mounting hole inner wall formed in this way
Evenly, fixed hole shape is also more regular.
Preferably, the pretreated alloy powder of filling in the step S3 is to the die body, wherein the pretreatment
It specifically includes：
S31 choose production state granularity be 20~35 μm, grinding state granularity is 3.2~6.0 μm, tap density be 7.0~
10.0g/cm3, oxygen content≤0.02% and total carbon content 6.0%~6.2% tungsten carbide and apparent density be 0.5~
1.5g/cm3, average particle size be 0.8~2.0 μm, the intermediate value D50 of size distribution is in 20 μm of cobalts below；
S32 is ground：Alloy powder and abrasive media that ramet, step the S31 tungsten carbide chosen are constituted with cobalt and
Absolute ethyl alcohol is mixed by predetermined ratio, wherein the abrasive media includes atoleine, and the predetermined ratio is by weight such as
Under：Alloy powder: abrasive media: absolute ethyl alcohol=50: 1: 15, then press ratio of grinding media to material 1: 2.5~5.0, the wet-milling in ball mill
20~30 hours, mixture is obtained using spray drying；
S33 degummings：The degumming in a dewaxing furnace, degumming temperature are 450~550 DEG C, and soaking time is 100~200min；
The step S6 is specifically included：The alloy tup green compact are placed in a sintering furnace, are carried out under hydrogen protection
Sintering, sintering temperature are 1300 to 1500 degrees Celsius, sintering time 1 to 3 hours, and are pressurized to 6~8MPa.
In a preferred embodiment, in the alloy powder, the content of the cobalt is 10.5%, and the ramet contains
Amount is 0.5%, and the content of the tungsten carbide is 89%.
Further, to improve the toughness of the alloy tup, the alloy tup can also be existed after step S6
Oil quenching is carried out under 1300 to 1400 degrees Celsius.
Fig. 9 is referred to, Fig. 9 is the idiographic flow schematic diagram of step S6 in Fig. 8.As shown in figure 9, the step S6 is specifically wrapped
Include following steps：
S61 applies a thrust to the upper punch, and the pedestal, core bar, threaded hole and the alloy tup are given birth to
Base is released outside the die body；
S62 takes out the core bar from the core bore；
S63 dismantles the threaded rod using extracting tool, and the extracting tool is equipped with dismounting compatible with the groove
Bar back-outs the threaded rod by rotating the removal rod counterclockwise from the alloy tup green compact；
S64 takes out the alloy tup green compact.
In the method for preparing alloy tup of the present invention, S63, is made using extracting tool and groove cooperation through the above steps
Threaded rod can be exited safely, and the screw thread on mounting hole inner wall to make the alloy tup is indeformable, preferably ensures
When being installed in equipment (such as sand making machine), mounting hole can match with the associated components of equipment the alloy tup well
It closes so that the alloy tup firmly fixes, and will not fall off easily.Manual type shape can only be used in compared with the prior art
At the mode of mounting hole inner thread, the present invention realizes one-pass molding by mold design, significantly reduces the complexity of technique
And time cost.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (9)
1. a kind of alloy tup, which is characterized in that the alloy tup includes：Hammer body, the first surface from the hammer body to
On the direction that the second surface of the hammer body extends, it is equipped with mounting hole and the anti-deformation hole across the hammer body successively, wherein institute
State that first surface is opposite with the second surface, the axle center of the mounting hole is overlapped with the axle center in the anti-deformation hole, described solid
The inner wall for determining hole is equipped with screw thread, and the anti-deformation hole when the alloy tup is molded for ensuring that the mounting hole is formed as pre-
If shape；The aperture in the anti-deformation hole is α, α=1/2 with the aperture ratio of the mounting hole.
2. alloy tup as described in claim 1, which is characterized in that the hammer body in a rectangular parallelepiped shape, and the hammer body appoint
Two neighboring surface of anticipating is connected by rounded corner transition part.
3. a kind of mold preparing claim 1 to 2 any one of them alloy tup, which is characterized in that the mold includes：
Die body, upper punch, pedestal, core bar, threaded rod, the pedestal are equipped with the through-hole for installing the threaded rod, and the threaded rod includes
Screw thread bar body and mounting portion, the mounting portion are adapted to the through-hole, and the screw thread bar body protrudes from the pedestal, institute
It states mounting portion and is equipped with the groove being open towards pedestal bottom surface direction, the separate institute of the groove to the screw thread bar body
It states mounting portion one end and is equipped with core bore, the core bar passes through the core bore against the bottom of the groove, and the die body is equipped with hollow
Portion, the hollow portion is interior to accommodate the pedestal and the upper punch, and the upper punch corresponds to the core bar and is equipped with perforation, described
Filled with the alloy powder for being used to prepare the alloy tup between pedestal and the upper punch.
4. mold as claimed in claim 3, which is characterized in that the die body is big to the thickness of the upper punch from the pedestal
In length far from described mounting portion one end of the screw thread bar body from the mounting portion to the screw thread bar body.
5. mold as claimed in claim 4, which is characterized in that the screw thread bar body is integrally formed with the mounting portion, and
Screw thread bar body diameter when extending to the extreme direction far from the mounting portion close to one end of the mounting portion is gradual
Reduce.
6. mold as claimed in claim 5, which is characterized in that limited part is equipped with above the die body, for making the upper punching
Head is moved along predetermined direction when moving.
7. a kind of method preparing alloy tup as described in claim 1, which is characterized in that the preparation method includes following
Step：
S1 provides a mold for preparing the alloy tup, and the mold includes：Die body, upper punch, pedestal, core bar, screw thread
Bar, wherein the threaded rod includes screw thread bar body and mounting portion, and the mounting portion is disposed an outwardly facing the pedestal bottom surface side
To the groove of opening；
The mounting portion of the threaded rod is inserted into the through-hole of the pedestal by S2, then installs the core bar to the threaded rod
Core bore, the die body, which is set in outside the pedestal, makes the pedestal be located in the hollow portion of the die body；
S3 fills pretreated alloy powder to the hollow portion, and the alloy powder includes cobalt, ramet, tungsten carbide,
In, it is calculated by mass percentage, the content of cobalt is 9%~11%, and the content of ramet is 0.4%~0.6%, and surplus is carbonization
Tungsten；
The perforation of the upper punch across the core bar, is made the upper punch be installed to the alloy powder in the die body by S4
Top；
S5 is pressed into alloy tup green compact；
S6 dismantles the mold, takes out the alloy tup green compact；
S7 is by the alloy tup green compact pressure sintering.
8. the method for claim 7, which is characterized in that the pretreated alloy powder of filling in the step S3 is extremely
The die body, wherein the pretreatment specifically includes：
S31 selection production state granularities are 20~35 μm, grinding state granularity is 3.2~6.0 μm, tap density is 7.0~10.0g/
cm3, oxygen content≤0.02% and total carbon content 6.0%~6.2% tungsten carbide and apparent density be 0.5~1.5g/cm3、
Average particle size is 0.8~2.0 μm, the intermediate value D50 of size distribution is in 20 μm of cobalts below；
S32 is ground：Alloy powder and abrasive media that ramet, step the S31 tungsten carbide chosen and cobalt are constituted and anhydrous
Ethyl alcohol is mixed by predetermined ratio, wherein the abrasive media includes atoleine, and the predetermined ratio is by weight as follows：
Alloy powder: abrasive media: absolute ethyl alcohol=50: 1: 15, then press ratio of grinding media to material 1: 2.5~5.0, in ball mill wet-milling 20~
30 hours, mixture is obtained using spray drying；
S33 degummings：The degumming in a dewaxing furnace, degumming temperature are 450~550 DEG C, and soaking time is 100~200min；
The step S7 is specifically included：The alloy tup green compact are placed in a sintering furnace, are sintered under hydrogen protection,
Sintering temperature is 1300 to 1500 degrees Celsius, sintering time 1 to 3 hours, and is pressurized to 6~8MPa.
9. method as claimed in claim 7 or 8, which is characterized in that the step S6 specifically includes following steps：
S61 applies a thrust to the upper punch, and the pedestal, core bar, threaded hole and the alloy tup green compact are pushed away
Go out outside the die body；
S62 takes out the core bar from the core bore；
S63 dismantles the threaded rod using extracting tool, and the extracting tool is equipped with removal rod compatible with the groove,
Back-out the threaded rod from the alloy tup green compact by rotating the removal rod counterclockwise；
S64 takes out the alloy tup green compact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030174.3A CN105537584B (en) | 2015-12-31 | 2015-12-31 | Alloy tup, the mold and method for preparing alloy tup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030174.3A CN105537584B (en) | 2015-12-31 | 2015-12-31 | Alloy tup, the mold and method for preparing alloy tup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105537584A CN105537584A (en) | 2016-05-04 |
| CN105537584B true CN105537584B (en) | 2018-09-11 |
Family
ID=55817402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511030174.3A Active CN105537584B (en) | 2015-12-31 | 2015-12-31 | Alloy tup, the mold and method for preparing alloy tup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105537584B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112453406A (en) * | 2020-10-27 | 2021-03-09 | 上海纪玲粉末冶金厂 | Blade connecting seat preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397395A (en) * | 2002-07-11 | 2003-02-19 | 株洲硬质合金集团有限公司 | Technology and die for machining part with internal screw hole |
| CN1907603A (en) * | 2006-08-08 | 2007-02-07 | 海门市常乐粉末冶金厂 | Manufacture method and die for powder metallurgy inside spin ratchet wheel |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
| CN101850285A (en) * | 2010-06-13 | 2010-10-06 | 淮阴工学院 | Combined position board hammer of reaction crusher capable of rapidly changing wear position and manufacturing method thereof |
| CN203663915U (en) * | 2013-12-18 | 2014-06-25 | 赣县海德新材料有限公司 | Hard alloy hammer head |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT406240B (en) * | 1996-06-20 | 2000-03-27 | Miba Sintermetall Ag | MOLDING TOOL FOR PRESSING A MOLDED BODY FROM A SINTER POWDER |
-
2015
- 2015-12-31 CN CN201511030174.3A patent/CN105537584B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1397395A (en) * | 2002-07-11 | 2003-02-19 | 株洲硬质合金集团有限公司 | Technology and die for machining part with internal screw hole |
| CN1907603A (en) * | 2006-08-08 | 2007-02-07 | 海门市常乐粉末冶金厂 | Manufacture method and die for powder metallurgy inside spin ratchet wheel |
| CN101629263A (en) * | 2009-08-06 | 2010-01-20 | 江西稀有稀土金属钨业集团有限公司 | Ultrafine cemented carbide and preparation method and application thereof |
| CN101850285A (en) * | 2010-06-13 | 2010-10-06 | 淮阴工学院 | Combined position board hammer of reaction crusher capable of rapidly changing wear position and manufacturing method thereof |
| CN203663915U (en) * | 2013-12-18 | 2014-06-25 | 赣县海德新材料有限公司 | Hard alloy hammer head |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105537584A (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104148651B (en) | A kind of preparation method of TiC carbide alloy composite grinding roll | |
| CN104884203B (en) | A kind of method of the metal sleeve for the carrier for manufacturing the abrasive material for being used as saw pearl | |
| CN106133342A (en) | Self-punching rivet | |
| US9403289B2 (en) | Diamond tool and method of making this tool | |
| CN105537584B (en) | Alloy tup, the mold and method for preparing alloy tup | |
| CN101885069B (en) | Manufacturing method of powdery high-speed steel and structural steel bimetal composite material | |
| CN105234405A (en) | Preparation method for iron-based powder metallurgy part with compact surface | |
| CN107206497B (en) | Sintered body surface densification finishing mold, densifying method and obtained product | |
| CN104722753B (en) | Preparation method of tungsten-copper powder for shaped charge cover of perforating charge | |
| CN103696697A (en) | Rock deep-hole high-speed rhinestone drill bit and production process thereof | |
| CN103861882B (en) | A kind of tinned copper wire wire drawing die wrapping up diamond metal sinter and preparation method thereof | |
| CN102489687A (en) | Preparation method of gradient composite wear resistant material | |
| CN205323881U (en) | Mould of alloy tup and preparation alloy tup | |
| CN105170915B (en) | The preparation method of air compressor machine screw rod | |
| CN107138712B (en) | ZGM type repairable metal ceramic composite grinding roller and manufacturing method thereof | |
| CN105671398A (en) | Machining method for hard alloy rock excavating drilling tooth | |
| KR20170093982A (en) | Drill ring for core drill bit and method for manufacturing drill ring | |
| CN101844208A (en) | Production process of high-chromium alloy ceramic particle composite grids | |
| CN204294922U (en) | A kind of metallic sintered products compacting tool set of improvement | |
| CN110449593B (en) | Steel-bonded hard alloy head for manufacturing coal cutting pick and preparation method thereof | |
| WO2005081640A2 (en) | Method of molding metal powder | |
| CN106670472B (en) | A kind of preparation method of diamond sandwich type hard alloy hard alloy composite ball tooth | |
| CN206838934U (en) | High-performance carbide screw nut mould with multilayered and graded structure | |
| CN106363154B (en) | Preparation method of crushing hammer head and crushing hammer head | |
| CN204194796U (en) | A kind of mould for the preparation of tungsten-cobalt hard alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |