CN105331792A - Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method - Google Patents
Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method Download PDFInfo
- Publication number
- CN105331792A CN105331792A CN201510685049.XA CN201510685049A CN105331792A CN 105331792 A CN105331792 A CN 105331792A CN 201510685049 A CN201510685049 A CN 201510685049A CN 105331792 A CN105331792 A CN 105331792A
- Authority
- CN
- China
- Prior art keywords
- water spray
- induction
- quenching
- live axle
- spray ring
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
A quenching inductor for a low-speed large-torque drive wheel axle is applied to the drive wheel axle and comprises an inductor base body assembly and a quenching water spray assembly. The two assemblies are connected into a whole through a bolt via an insulation connecting sleeve. A size confirmation method matched with the quenching inductor for the low-speed large-torque drive wheel axle comprises the steps that according to the appearance size of the low-speed large-torque drive wheel axle, an externally-arranged quenching induction device and the matching condition of power equipment, confirmation is carried out by combining the quenching induction process requirement; the matching size design problem of the effective induction ring diameter, water spray ring diameter, water spray ring water spray face inclination angle, water spray ring diameter and induction ring distance needed by the quenching inductor is solved; and the quenching inductor is easy to manufacture and convenient to match, and quenching induction quality can be controlled more effectively.
Description
Technical field
The present invention relates to induction heat treatment technical field, especially a kind of quenching inducer for low-speed big live axle and method for determining size.
Background technology
Low-speed big live axle (material 42CrMo steel) is key, safety feature on high-power (more than 160 horsepowers) wheeled tractor, for meeting the demand of tractor farming and transport under different operating mode, the structure design relative complex of live axle, and structure formation can not arbitrarily be changed, otherwise can partial loss of function be made, reduce the usability of tractor, severe patient even has influence on the security of complete machine.The load that this live axle bears in low-speed big working process is bent/twisted repeated load mainly, makes its top layer subject the stress higher than heart portion, meanwhile, because working conditions is severe, very easily cracks, causes early fracture.For improving the work-ing life of such live axle, this part thermal treatment of current design requirements is modified+mid-frequency induction hardening, the requirement of induction quenching layer is comparatively dark and continuous, and to bottom the tooth bar of part, keyway, spline and the induction quenching layer depth at each step place propose clear and definite requirement, suitable hardened depth must be had, to obtaining good mechanical property.
At present, the induction heat processing method of relevant to low-speed big live axle axial workpiece is analyzed as follows:
1, the induction heat processing method of tooth bar axial workpiece is with
(1) contact induction heat treatment, carries out selective hardening process to tooth bar class part, and its quench-hardened case is at below 2mm, and quenching quality is good.
But weak point is: the method cannot realize having the requirement of live axle induction heat treatment of tooth bar, keyway, multiple stage rank and spline four kinds of structure types, can not realize very dark quench-hardened case simultaneously.
(2) step quenching, can realize the surface strengthening of part different zones, meets the technical requirements of each portion faces strengthening of tooth bar, improves the practicality of part.
But weak point is: sectional type induction heat processing method makes to there is quenching zone of transition in the middle of each region of part, and this district's induction quenching floor is weak link, and namely induction quenching layer is discontinuous.
2, the induction heat processing method of step axial workpiece
(1) rectangular loop inductor block one piece heating method, can ensure spline and boss and bar portion hardened layer uniformly continous.Overall heating process is better, and part deformation is little, is convenient to realize automatization, and productivity is higher.
But weak point is: this induction heat processing method needs sizable power, be difficult to because of the limitation of conditions adopt in big-powered tractor low-speed big live axle induction heat treatment.
(2) annular laser heating quenching mode successfully solves the induction heat treatment requirement of large reducing step axial workpiece, and below 100 horsepowers, the part such as live axle, power output shaft of tractor is well used, and obtains good economic benefits.
But weak point is: the method cannot realize having the requirement of low-speed big live axle induction heat treatment of tooth bar, keyway, multiple stage rank and spline four kinds of structure types simultaneously, and due to the surface action principle of induction heat treatment, this method of direct utilization, can cause bottom part such as tooth bar and not reach quenching temperature, and the phenomenon that its tip is overheated, can not realize expecting object.
3, the induction heat processing method of semiaxis
(1) annular inductor block continous heat processing method, its inductor block, by particular design, improves its heating efficiency, reduces the degree of superheat of boss face, to ensure each cross section homogeneous heating.
This technical scheme mainly solves the intensity of ring flange arc surface, improve the performance of semiaxis, but weak point is: if this induction heat processing method is for heating tooth bar, cannot realize flank of tooth homogeneous temperature, thus produces quality accident.
(2) larger semiaxis factory is for boosting productivity, and often select rectangle inductor block heat treating method, the method needs to select high power frequency conversion power supply, and researchist devises energy controller for this reason, thus controls thermal treatment quality.
But weak point is: rectangle inductor block heat treating method, need larger power supply and auxiliary facility is complicated, cost is high, is unwell to the induction heat treatment of high-power wheeled tractor low-speed big live axle.
From technical standpoint analysis, the surface strengthening at tooth bar, keyway, step and spline position is induction heat treatment difficult point, but high-power wheeled tractor low-speed big live axle part has tooth bar, keyway, step and spline four kinds of structure types substantially all simultaneously, and size is comparatively large, and (length is more than or equal to 800mm, the diameter of axle is more than or equal to 60mm), the induction heat treatment difficulty of part is larger.The existence of these structures causes part when induction heating because the reason of surface action, sharp angle effect causes subregion non-uniform temperature, local temperature is difficult to reach quenching temperature, cause quenched case discontinuous, and piece surface fluctuation is large, during quenching, hardening crack tendency strengthens, and simultaneously the quench-hardened case of this kind of part requirements is comparatively dark, with high content of technology, induction quenching difficulty is large, its difficult quality guarantee of quenching, belongs to induction heating knotty problem.
For the problems referred to above, the applicant has applied for the patent of invention of " a kind of induction heat processing method of low-speed big live axle ", content is: select suitable induction hardening equipment, utilize existing equipment, adopt the method for continuously pre-heating+laser heating quenching, take first part preheating one time, to the region of part difficulty heating, adopt the method for multi input energy, second time heating and quench cooled time, suitable adjustment part translational speed and the residence time, both ensured that the quench-hardened case of optical axis surface and each structure and structural transformation zone of transition was continuous, obtain darker quench-hardened case, be unlikely to again the tooth bar easily producing quenching crack, keyway, there is crackle in the region that spline etc. produce heat treatment stress, avoid the generation of the precipitous and soft ribbons of the hardened depth change caused because of cooling problem, and ensure that whole axle, particularly tooth bar, keyway, each diameter of axle step place, bottom spline, hardened depth meets the requirements.
It should be noted that, in above-mentioned patent, although the quench-hardened case that relate to optical axis surface and each structure and structural transformation zone of transition is continuous, avoid the solution of the problems such as the precipitous generation with soft ribbons of the hardened depth change caused because of cooling problem, but carry out in the lump studying with regard to itself and above-mentioned induction hardening equipment and with regard to the quenching inducer applied, the non-degree of depth relates to, such as:
1, when heating the multiple diameter of axle of Same Part, the problem of the induction heating efficiency of quenching inducer how is improved; How foundation need implement induction hardened live axle and the adapted situation with the induction hardening equipment of joining and power unit etc. outward, solves the design problem of quenching inducer;
2, need diameter of axle quench cooled multiple to Same Part time, how the refrigerating unit of inductor block ensures that speed of cooling meets the requirements, particularly how to ensure bottom tooth bar, bottom keyway, each diameter of axle step root place, speed of cooling bottom spline meet the requirements, avoid the problems such as the precipitous generation with soft ribbons of the hardened depth change that causes because of cooling problem;
3, when quenching to this complicated shape laser heating, how to control pre-coo time, avoiding the problems such as the generation of the sharp corner crackle at the position such as tooth bar, keyway, each diameter of axle step place, spline.
Above problem, should solve in the lump, only in this way, the guarantee high-power wheeled tractor induction quenching quality of low-speed big live axle, meet and use needs, for this reason, the applicant is while research " a kind of induction heat processing method of low-speed big live axle ", also have studied in the lump " a kind of quenching inducer for low-speed big live axle and method for determining size ", and have received good effect.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of quenching inducer for low-speed big live axle and method for determining size, namely, make single turn induction coil by adopting rectangle copper tube and adopt copper sheet to make cylinder manifold and web plate, solving the problem of the multiple diameter of axle heating of Same Part and induction heating improved efficiency; By adopting independently quenching water spray refrigerating unit, control water spray angle, the distance of in good time adjustment quenching water spray refrigerating unit and induction coil, solve the quench cooling rate problem at each position of part, solve simultaneously and how to control pre-coo time, avoid the problems such as the precipitous generation with soft ribbons of the hardened depth change that causes because of cooling problem; By adopting adapted method for determining size, solve the problem identificatioin of the adapted sizes such as the such as actual induction width of heating needed for quenching inducer, solve the slow cooling matter of time of water-spraying control, and make induction quenching quality can obtain more effectively controlling; In addition, this quenching inducer, novel, rational in infrastructure, application is reliable, is easy to make, and adapted method for determining size simple possible, easy to implement, there is good use value.
For achieving the above object, the present invention adopts following technical scheme: a kind of quenching inducer for low-speed big live axle, be applied on live axle, comprise inductor block matrix component and quenching water spray assembly, two assemblies are held together by bolt by insulation joint sleeve;
Inductor block matrix component of the present invention, by welding hold together, comprise effective induction coil, described actual induction circle be circumferentially fixedly installed induction coil web plate and cylinder manifold, described induction coil web plate is connected with quenching water spray assembly; Described cylinder manifold is connected with web plate, and cylinder manifold clamps with induction hardening transformer and is connected with bolt by described web plate; Described cylinder manifold is also provided with for water composite cooling pipe joint, for the refrigerating unit of water composite cooling pipe joint by hose connection lathe;
Quenching water spray assembly of the present invention, is held together by welding, comprises water spray ring, water spray ring be circumferentially fixedly installed water spray ring web plate and spray quench fluid tube joint, described spray quench fluid tube joint connects hardening liquid pipeline.
The position of induction coil web plate of the present invention and water spray ring web plate along one_to_one corresponding on the axis of live axle, and is connected with insulation joint sleeve between two web plates.
The inner ring of water spray ring of the present invention is provided with several spray quench cooled liquid water holes.
The diameter in spray quench cooled liquid water hole of the present invention is φ 1.8, is interspersed in checkerboard.
All part materials of inductor block matrix component of the present invention and quenching water spray assembly are red copper T3.
For an adapted method for determining size for the quenching inducer of low-speed big live axle, it is characterized in that: the steps include:
S1: the diameter phi 1 adapted size of actual induction circle is determined: according to the maximum diameter ∮ that need implement induction hardened live axle 1
2dimensional conditions, and the induction coil inwall required according to induction hardening process and part are responded to spacing λ ' size and are determined that actual induction loop diameter φ 1 adapted size should be determined as follows:
φ1＝∮
2+2λ'；
S2: water spray ring diameter phi 2 adapted size is determined: be according to implementing induction hardened live axle maximum diameter ∮
2spacing λ responded to by dimensional conditions and the water spray ring inwall required according to induction hardening process and part " size determined that i.e., effective water spray ring diameter phi 2 adapted size should be determined as follows:
φ2＝∮
2+2λ”；
S3: water spray ring water spray face tilt angle [alpha] adapted size is determined: be according to implementing induction hardened live axle 1c1 place angle case α 1 and be determined according to the water spray ring water jet column of induction hardening process requirement and the surperficial angle α ' of part 1c1, namely, water spray ring water spray face tilt angle [alpha] adapted size, should be determined as follows:
α＝90-(α1+α')；
S4: water spray ring upper surface and induction coil lower surface distance H adapted size are determined: be according to implementing induction hardened live axle tooth bar place diameter ∮
1place dimensional conditions and according to induction hardening process require water spray ring upper surface and induction coil lower surface spacing size h
0determined, that is, water spray ring upper surface and induction coil lower surface distance H adapted size, should be determined as follows:
H＝∮
1+h
0。
Owing to adopting the above technical scheme, the present invention can reach following beneficial effect: a kind of quenching inducer for low-speed big live axle of the present invention, in the structure design of its inductor block, due to the single turn induction coil adopting rectangle copper tube to make inductor block, not only efficiently solve the Upgrade Problem of induction heating efficiency, but also solve the induction heating problem of the multiple diameter of axle of Same Part.
A kind of quenching inducer for low-speed big live axle of the present invention, adopt the quenching cooler of independently tiltedly water spray ring, namely hardening liquid is tiltedly sprayed onto piece surface by water spray ring and carries out quench cooled, guarantee that the quench cooling rate in each region of part meets processing requirement, efficiently solve the problems such as the precipitous generation with soft ribbons of the hardened depth change caused because of cooling problem.
A kind of quenching inducer for low-speed big live axle of the present invention, adopt the quenching cooler of independently water spray ring, control the distance of water spray ring and induction coil, the pre-coo time of controlled workpieces hardened area, avoids the generation of the sharp corner crackle at the position such as tooth bar, keyway, each diameter of axle step place, spline.
The adapted method for determining size of a kind of quenching inducer for low-speed big live axle of the present invention, system is according to low-speed big live axle physical dimension, the adapted situation of the induction hardening equipment of joining outward and power unit also requires to be determined in conjunction with induction hardening process, solve the actual induction loop diameter needed for quenching inducer, water spray ring diameter, water spray ring water spray face tilt angle, the adapted size design problem of water spray ring and induction coil distance, quenching inducer is not only made to be easy to make and be convenient to adapted, and make induction quenching quality can obtain more effectively controlling.
A kind of quenching inducer for low-speed big live axle of the present invention, novel, rational in infrastructure, application is reliable, is easy to make, and application method simple possible, easy to implement, there is good use value.
Accompanying drawing explanation
Fig. 1 is drive axle structures schematic diagram described in the embodiment of the present invention two;
Fig. 2 is the C-C sectional view of Fig. 1;
Fig. 3 is the structural representation of the quenching inducer for low-speed big live axle of the present invention;
Fig. 4 is the D direction view of Fig. 3;
Fig. 5 is the structural representation of inductor block matrix component;
Fig. 6 is the F direction view of Fig. 5;
Fig. 7 is the structural representation of quenching water spray assembly;
Fig. 8 is the G direction view (removing spray quench fluid tube joint 9) of Fig. 7;
Fig. 9 is that quenching inducer of the present invention is installed and parts fixation position operating diagram;
Figure 10 is that quenching water spray assembly of the present invention carries out Liquid injection cooling schematic diagram;
In figure: 1, live axle; 1a, tooth bar; Bottom 1a', tooth bar; 1b, keyway; Bottom 1b', keyway; 1c1, first step; 1c1', first step root; 1c2, second step; 1c2', second step root; 1c3, the 3rd step; 1c3', the 3rd step root; 1c4, the 4th step; 1c4', the 4th step root; 1d, spline; Bottom 1d', spline; 1e, relief groove; 2, inductor block matrix component; 3, quenching water spray assembly; 4, actual induction circle; 4a, induction coil web plate; 5, cylinder manifold; 6, web plate; 7, for water composite cooling pipe joint; 8, water spray ring; 8a, water spray ring web plate; 8b, spray quench cooled liquid water hole; 9, quench fluid tube joint is sprayed; 10, insulate joint sleeve; 11, induction hardening transformer; 12, quench cooled liquid; 13, " inside and outside behaviour " working station indicator; 14, NC panel; 14a, manual mode operating key; 14b, automatic mode operating key; 14c, rotary knob; 14d, spray hardening liquid button.
In another figure: L, contour length size; ∮
1, keyway section diameter of axle size; ∮
2, first step section diameter of axle size; ∮
3, second step section diameter of axle size; ∮
4, the 3rd step section diameter of axle size; ∮
5, the 4th step section diameter of axle size; O
1, upper centre hole; O
2, lower centre hole; Q, induction coil upper surface; Q', induction coil lower surface; P, water spray ring upper surface; A, spline upper surface; B', relief groove upper surface; φ 1, actual induction loop diameter; φ 2, effectively water spray ring diameter; Spacing responded to by λ ', induction coil inwall and part; λ ", water spray ring inwall and part respond to spacing; α, water spray ring water spray face tilt angle; α 1, live axle 1c1 place angle; α ', water spray ring water jet column and part 1c1 surface angle; H, water spray ring upper surface and induction coil lower surface distance; h
0, water spray ring upper surface and induction coil lower surface spacing size.
Embodiment
Can explain the present invention in more detail by the following examples, the present invention is not limited to the following examples, discloses object of the present invention and is intended to protect all changes and improvements in the scope of the invention.
Embodiment one
For a quenching inducer for low-speed big live axle, be applied on live axle 1, comprise inductor block matrix component 2 and quenching water spray assembly 3, two assembly and held together by bolt by insulation joint sleeve 10; Inductor block matrix component 2 of the present invention, held together by welding, comprise effective induction coil 4, described actual induction circle 4 be circumferentially fixedly installed induction coil web plate 4a and cylinder manifold 5, described induction coil web plate 4a is connected with quenching water spray assembly 3; Described cylinder manifold 5 is connected with web plate 6, and cylinder manifold 5 clamps with induction hardening transformer 11 and is connected with bolt by described web plate 6; Described cylinder manifold 5 is also provided with for water composite cooling pipe joint 7, for the refrigerating unit of water composite cooling pipe joint 7 by hose connection lathe; Quenching water spray assembly 3 of the present invention, is held together by welding, comprises water spray ring 8, water spray ring 8 be circumferentially fixedly installed water spray ring web plate 8a and spray quench fluid tube joint 9, described spray quench fluid tube joint 9 connects hardening liquid pipeline.The position of induction coil web plate 4a of the present invention and water spray ring web plate 8a along one_to_one corresponding on the axis of live axle 1, and is connected with insulation joint sleeve 10 between two web plates.The inner ring of water spray ring 8 of the present invention is provided with several spray quench cooled liquid water hole 8b.The diameter of spray quench cooled liquid water hole 8b of the present invention is φ 1.8, is interspersed in checkerboard.All part materials of inductor block matrix component 2 of the present invention and quenching water spray assembly 3 are red copper T3.
Embodiment two
Below, for an embodiment, illustrate the adapted method for determining size of a kind of quenching inducer for low-speed big live axle of the present invention, the steps include:
The low-speed big live axle 1 (for structure shown in Fig. 1, Fig. 2) of certain enterprise's 160 horsepowers of wheeled tractor, material is 42CrMo, and the hardened depth in each region is respectively: bottom tooth bar 1a >=2mm; Bottom keyway 1b >=2mm; Each diameter of axle and step place 7mm ~ 12mm; 3.25mm ~ 8.25mm bottom spline 1d; Special requirement quench-hardened case is continuous, and quenching hardness is 52HRC ~ 57HRC, and piece surface must not exist the defects such as burn, crackle.
In this embodiment, known by Fig. 1, Fig. 2, this axial workpiece has tooth bar 1a simultaneously, keyway 1b, several structure types such as step 1c1,1c2,1c3,1c4 and spline 1d, accessory size is larger, and tooth bar and keyway are at same shaft part, the long L of physical dimension is 925mm, diameter of axle size be respectively tooth bar, keyway section ∮ 1 for 95mm, step 1c1 section ∮ 2 be 100mm, step 1c2 section ∮ 3 is 95mm, step 1c3 section ∮ 4 is 94mm, and step 1c4 section ∮ 5 is the tilt angle alpha 1 at 90mm, 1c1 place is 30 °.According to induction hardening process requirement, induction coil inwall and part respond to spacing λ ' for 3mm, spacing λ responded to by water spray ring inwall and part " be of a size of 30mm, water spray ring water jet column and part 1c1 surface angle α ' they are 15 °, water spray ring upper surface and induction coil lower surface spacing size h
0for 20mm.
According to above-mentioned situation, determine the adapted size of quenching inducer used, step is as follows:
1) actual induction loop diameter φ 1 adapted size, determine as follows:
φ1＝∮
2+2λ'＝100+2×3＝106mm；
2) water spray ring diameter phi 2 adapted size, determine as follows:
φ2＝∮
2+2λ”＝100+2×30＝160mm；
3) water spray ring water spray face tilt angle ∠ 1 adapted size, determine as follows:
α＝90-(α1+α')＝90-(30+15)＝45°；
4) water spray ring upper surface and induction coil lower surface distance H adapted size, determine as follows:
H＝∮
1+h
0＝95+20＝115mm；
So far, the adapted size needed for a kind of quenching inducer for low-speed big live axle, all determines complete to this, subsequently, can by this adapted size, the construction drawing improving quenching inducer further designs and completes its material object manufacture.
According to Fig. 3, Fig. 4, Fig. 9, a kind of quenching inducer for low-speed big live axle of the present invention has completed it and has made, and being mated application object---induction quenching transformer 11, power unit, numerical control quenching machine tool are configured in production scene together, in addition, electrical control cubicles and water pump component is also configured with.
Further illustrate following some:
1, the web plate 6 of quenching inducer is bolted with induction quenching transformer 11 web plate, the position of adjustment induction quenching transformer and base height can realize upper surface Q and live axle axes normal, the internal surface of actual induction circle 4 and the gap uniformity on live axle surface of the actual induction circle 4 of quenching inducer.
2, the refrigerating unit for water composite cooling pipe joint 7 and lathe of quenching inducer passes through hose connection, and spray quench fluid tube joint 9 is connected with hardening liquid pipeline.
In this embodiment, numerical control quenching machine tool model used is GCK1650, and manufacturer is Luoyang Sanheng Induction Heating Technology Co., Ltd.; Intermediate frequency power supply unit type is KGPS250/8000, and manufacturer is Hubei Shiyan Hengjin Science & Technology Co., Ltd..
In this embodiment, the determination of induction hardening transformer transformation when electrical capacity, composition graphs 9 is explained, namely adjusting on numerical control quenching machine tool induction hardening transformer 11 and setting the transformer ratio adapted with described live axle 1 is 16:1, selected electrical capacity C: be 1,2,5,6 from left number, by the adjustment of transformation when electrical capacity, the IF-FRE that the method for the invention is selected can be guaranteed;
1) numerical control quenching machine tool induction hardening transformer 11 and intermediate frequency power supply apparatus cools taps is opened, guarantee that cooling water pressure is at 0.1MPa ~ 0.4MPa, water route is unimpeded, makes induction hardening transformer and intermediate frequency power supply be in water-cooled state, avoids causing electric elements to cross cause thermal damage in use procedure;
2) numerical control quenching machine tool and intermediate frequency power supply equipment electric switch is connected, namely by the display of pilot lamp 13, working order of guaranteeing that intermediate frequency power supply is in " interior behaviour ";
3) work out on the NC panel 14 of numerical control quenching machine tool and input induction quenching working procedure;
4) parts fixation, composition graphs 9 is explained, and namely adopts vertical mode to be installed on the station of numerical control quenching machine tool described driving wheel axial workpiece 1, spline 1d structure upward, be conducive to the self-tempering of driving wheel axial workpiece splined end, decrease quenching stress, avoid the generation of part crack; Simultaneously on the operating panel on numerical control quenching machine tool electrical control cubicles top, select manual mode operating key 14a, operation lathe moving parts, ensures the upper and lower top upper and lower centre hole O withstanding part of lathe station
1, O
2, suitably finely tune inductor block 2 simultaneously, make the gap uniformity of inductor block 2 and part 1;
5) determination of zero-bit, composition graphs 9 is explained, namely on the operating panel 14 on numerical control quenching machine tool electrical control cubicles top, select manual mode operating key 14a, move up and down part 1, make described driving wheel axial workpiece spline 1d upper surface A and induction coil 4 upper surface Q be in a plane, with herein for benchmark, part 1 moves down as 200mm along V direction, and now namely the position of A place, spline 1d upper surface horizontal plane is decided to be zero-bit; The determination of zero-bit, the handling of convenient part;
6) determination of part speed of rotation, composition graphs 9 is explained, namely on the operating panel on numerical control quenching machine tool electrical control cubicles top, select manual mode operating key 14a, and press rotary knob 14c, part 1 is rotated, and the inner frequency transformer of numerical control quenching machine tool electrical control cubicles adjusts and sets suitable part speed of rotation n is 50n/min; Suitable part speed of rotation, is conducive to heat parts and cooling is even;
7) matching of induction quenching working procedure and part is verified, composition graphs 9 is explained, namely on the operating panel on numerical control quenching machine tool electrical control cubicles top, select automatic mode operating key 14b, part 1 follow procedure under automatic control mode is run once, now inductor block 2 and spray hardening liquid device 3 are failure to actuate, and by checking the consistence that part operation whole process action and programmed instruction require, adjustment induction quenching working procedure is to optimum regime;
8) determination of electrical parameter, composition graphs 9 is explained, namely on numerical control quenching machine tool operating panel, press manual mode operating key 14a, move up and down part 1, make to be in inductor block 2 heated perimeter, then in intermediate frequency power supply control region in the middle part of described driving wheel axial workpiece spline 1d, select manual heating pattern, adjustment also setting power parameter P on the operating panel of power control pod with middle frequency
spline: 51KW, and check IF-FRE parameter f
spline: whether 4000Hz, voltage of intermediate frequency parameter U:450V ~ 550V, electric current of intermediate frequency parameter I:100A ~ 140A, power factor COS Φ: 1 be within the scope of processing requirement; Often criticize before part is produced and all in the middle part of spline, adjust electrical parameter, ensure that the stable of this batch of part induction quenching quality;
8-1) on inspection, if IF-FRE parameter f, voltage of intermediate frequency parameter U, electric current of intermediate frequency parameter I, power factor COS Φ are within the scope of processing requirement, then manual moving parts 1 gets back to zero-bit, subsequently, enters next step 9);
8-2) on inspection, if IF-FRE parameter f, voltage of intermediate frequency parameter U, electric current of intermediate frequency parameter I, power factor COS Φ be not within the scope of processing requirement, then should by step 8-2-1), 8-2-2) and 8-2-3) adjust, until meet the requirements, manual moving parts 1 gets back to zero-bit again, enters next step 9);
8-2-1) check that whether inductor block 2 is corresponding with described driving wheel axial workpiece 1, or whether installation site is suitable, as undesirable, be then replaced with the inductor block 2 corresponding with part 1, or by step 1) installation site of adjustment inductor block 2, until meet the requirements;
8-2-2) by step 2) check and adjust induction hardening transformer 11 transformation when electrical capacity and part 1 adapt, until meet the requirements;
8-2-3) check whether intermediate frequency power supply equipment is in normal operating conditions, finishing, ensures that it can be used for normal work;
9) start spray hardening liquid device, composition graphs 9, Figure 10 are explained, and namely on numerical control quenching machine tool operating panel, open spray hardening liquid button 14d, guarantee that hydrojet pipeline is unobstructed, intact;
10) automatic control mode is selected: composition graphs 9 is explained, namely on numerical control quenching machine tool operating panel, select automatic mode operating key 14b, " grasping outward " working order of simultaneously guaranteeing that intermediate frequency power supply is in, now, the power supply of intermediate frequency power supply and the operation of numerical control quenching machine tool are all under parts program controls;
11) on numerical control quenching machine tool operating panel, press and automatically run button, part 1 enters automatic running status, starts to carry out induction heat treatment, according to step 3) and step 7) the induction quenching working procedure determining and adjust, automatically complete following operation:
12-1) composition graphs 9 is explained, top according to step 6 under numerical control quenching machine tool) the speed n that determines is that 50n/min rotarily drives part 1 and rotates, simultaneously part spline 1d upper surface A from zero-bit along U direction with speed u1 for 3000mm/min upwards quick travel, B' top, relief groove 1e upper surface is held to be that 3mm place is concordant with induction coil 4 lower surface Q' to part tooth bar 1a, inductor block 2 starts to heat part 1, and now the upper and lower run action of part stagnates s1 is 4 seconds; From this step, part enters pre-heating stage, utilizes thermal conduction to carry out preheating to part, can obtain darker quench-hardened case, avoids producing mass defect; Preheating dead time is to strengthen part end, bottom tooth bar, keyway, spline and the energy input at the difficult heating position such as each step root, ensures that part quench-hardened case is continuous;
12-2) part 1 keep rotate and rotating speed n is constant, from step 12-1) position, by the friction-motion speed v (n) of runs program instructions along V to moving down, arrive everywhere following successively, the upper and lower run action of part stagnates different time s (n) throughout, heating is concentrated at inductor block 2 pairs of these positions of part 1, during part holds 3mm place, A bottom, B' top 3mm to spline 1d upper surface, relief groove 1e upper surface mobile from tooth bar 1a, the heating of inductor block 2 pairs of parts 1 is not interrupted;
12-2-1) composition graphs 9 is explained, and part 1 is with speed v 1 for 190mm/min moves down, and to tooth bar, 1a' is that 5mm place is concordant with Q bottom, induction coil 4 upper surface, and dead time, s2 was 5 seconds;
12-2-2) composition graphs 9 is explained, and part 1 is with speed v 2 for 190mm/min moves down, and to keyway, 1b' is that 5mm place is concordant with Q bottom, induction coil 4 upper surface, and dead time, s3 was 8 seconds;
12-2-3) composition graphs 9 is explained, part 1 with speed v 3 for 190mm/min moves down, to diameter of axle ∮
1to ∮
2first step root 1c1' of transition is that 5mm place is concordant with Q' top, induction coil 4 lower surface, and dead time, s4 was 6 seconds;
12-2-4) composition graphs 9 is explained, part 1 successively with speed v 4 for 250mm/min (v5 is that 190mm/min, v6 are for 190mm/min) moves down, to second (three, four) individual step root 1c2'(1c3', 1c4') be that 5mm place is concordant with Q bottom, induction coil 4 upper surface, dead time s5 be 6 seconds (s6 be 4 seconds, s7 be 5 seconds);
12-2-5) composition graphs 9 is explained, and part 1 is with speed v 7 for 220mm/min moves down, and to spline, 1d' is that 5mm place is concordant with Q bottom, induction coil 4 upper surface, and dead time, s8 was 3 seconds;
12-2-6) composition graphs 9 is explained, and part 1 is with speed v 8 for 220mm/min moves down, and be that 3mm place is concordant with induction coil 4 upper surface Q to A bottom, spline 1d upper surface, dead time, s9 was 1.5 seconds;
12-3) part 1 keep rotate and rotating speed n is that 50n/min is constant, heating stops, composition graphs 9 is explained, part is from step 12-2-6) position along U direction with speed u2 for 3000mm/min upwards quick travel, B' top, relief groove 1e upper surface is held to be that 3mm place is concordant with induction coil 4 lower surface Q' to part tooth bar 1a, induction coil 4 starts again to heat part 1, now the upper and lower run action of part stagnates s10 is 2 seconds, this place's piece surface can be made to reach quenching temperature, this position is avoided to occur quenching crack, and reduce straight-line hardening zone of transition, reach the requirement of part induction heat treatment technology,
12-4) part 1 keep rotate and rotating speed n is that 50n/min is constant, induction coil 4 pairs of part 1 laser heatings, composition graphs 9, Figure 10 are explained, from step 12-3) position, part 1 along V direction with fast speed v9 for 500mm/min moves down the distance that a section is equivalent to induction coil 4 width, then extremely locate for 170mm/min continues to move down same distance with slightly secondary speed v 10, now, spray hardening liquid device 3 starts, start to spray quench cooled liquid 12 to part 1 by spray quench cooled liquid water hole ζ, namely carry out Liquid injection cooling, enter the induction quenching stage; This step processing mode can make part end, bottom tooth bar, keyway, spline and each step root zone of heating thickness even, after parts quenching, quench-hardened case is level and smooth, avoid hardened depth precipitous, ensure that the stress of piece surface is even, after quenching, hardened depth meets the requirements, and quench-hardened case is continuous, reaches superperformance; Part end and each step shaft shoulder place can be avoided due to the sharp angle effect of induction heating, and Heating temperature is too high, causes wedge angle local superheating phenomenon to occur, cracks, cause quality problems, make part degradation during quenching simultaneously;
12-5) part 1 keep rotate and rotating speed n is that 50n/min is constant, induction coil 4 pairs of part 1 laser heatings, the Liquid injection cooling of spray hardening liquid device 3 pairs of parts 1 does not also interrupt, from step 12-4) position, part 1 by the friction-motion speed v (n) of runs program instructions along V to moving down, arrive everywhere following successively, the upper and lower run action of part stagnates different time s (n) throughout, these position emphasis heating of induction coil 4 pairs of parts 1;
12-5-1) composition graphs 9, Figure 10 are explained, and part 1 is with speed v 1' for 170mm/min moves down, and to tooth bar, 1a' is that 5mm place is concordant with Q' top, induction coil 4 lower surface, and dead time, s2' was 1.5 seconds;
12-5-2) composition graphs 9, Figure 10 are explained, and part 1 is with speed v 2' for 200mm/min moves down, and to keyway, 1b' is that 5mm place is concordant with Q' top, induction coil 4 lower surface, and dead time, s3' was 3 seconds;
12-5-3) composition graphs 9, Figure 10 are explained, part 1 with speed v 3' for 180mm/min moves down, to diameter of axle ∮
1to ∮
2first step root 1c1' of transition is that 5mm place is concordant with Q bottom, induction coil 4 upper surface, and dead time, s4' was 1 second;
12-5-4) composition graphs 9, Figure 10 are explained, part 1 successively with speed v 4' for 300mm/min (v5' is that 180mm/min, v6' are for 180mm/min) moves down, to second (three, four) individual step root 1c2'(1c3', 1c4') be that 5mm place is concordant with Q' top, induction coil 4 lower surface, dead time s5' be 1 second (s6' be 1 second, s7' be 2 seconds);
12-5-5) composition graphs 9, Figure 10 are explained, and part 1 is with speed v 7' for 220mm/min moves down, and to spline, 1d' is that 5mm place is concordant with Q' top, induction coil 4 lower surface, and dead time, s8' was 1.5 seconds;
12-5-6) composition graphs 9 is explained, and part 1 is with speed v 8' for 220mm/min moves down, and be that 3mm place is concordant with induction coil 4 upper surface Q to A bottom, spline 1d upper surface, dead time, s9' was 1.5 seconds;
12-6) part 1 keep rotate and rotating speed n is that 50n/min is constant, heating stops, hydrojet continues, composition graphs 9, Figure 10 is explained, from step 12-5-6) position, the P bottom, upper surface that part 1 is moved downward to spline 1d upper surface A and water spray ring 8 with fast speed v11 for 450mm/min along V direction for 3mm place concordant, now part about 1 run action stagnates certain hour s11 is 32 seconds, then, the upper surface P that part 1 is moved upward to water spray ring 8 with slightly secondary speed u3 for 400mm/min along U direction with A bottom, spline 1d upper surface for 20mm place is concordant, it is 10 seconds that upper and lower run action stagnates certain hour s12 again, finally, part 1 is in part 1 diameter of axle ∮ with fast speed u4 for 650mm/min is moved upward to induction coil 4 along U direction
4during section middle part, hydrojet stops, this step processing mode can make part while the quenching of spline 1d region, and the moving up and down of part due to appropriate design, achieves the self-tempering in spline 1d region, decrease quenching stress, avoid the generation of part 1 crackle,
12-7) part 1 rotate stop, along V direction with speed v 12 for 3000mm/min moves down, spline 1d upper surface A is to zero-bit, and induction quenching working procedure terminates;
13) described driving wheel axial workpiece 1 is unloaded from numerical control quenching machine tool station, is placed on this part Special station tool, horizontal positioned, normal temperature air cooling to room temperature, it should be noted that cooling period this part be sure not contact water, oil or any liquid;
14) according to the technical requirements of described driving wheel axial workpiece product induction heat treatment, hardness is carried out, hardened depth to part 1, surface and subsurface defect inspection.
Further, described step 1), 3), 6), 8) in the transformation determined when electrical capacity, induction quenching working procedure, part speed of rotation and electrical parameter only to effective when same driving wheel axial workpiece and same equipment use.
Further illustrate, for live axle part described in this embodiment when complete machine carries out pre-stage test, the one of the main reasons of fracture accident once occurred: induction quenching layer is discontinuous.The part of the inductor block processing made according to adapted method for determining size of the present invention, carried out hardness, hardened depth, metallographic detection to it, result all meets the requirements, part defect detecting test: without finding the defects such as crackle.See the following form:
The above results shows, " a kind of quenching inducer for low-speed big live axle and method for determining size " of the present invention, the requirement of the large size live axle induction heat treatment simultaneously having tooth bar, keyway, step and spline four kinds of structure types can be met, and have received good effect, solve a bottleneck of high-power wheeled tractor development, there is significant progress.
The embodiment selected in this article in order to open object of the present invention, currently thinks to be suitable for, but it is to be understood that the present invention is intended to comprise all changes belonging to the embodiment in this design and the scope of the invention and improvement.
Claims (6)
1. the quenching inducer for low-speed big live axle, be applied on live axle (1), it is characterized in that: comprise inductor block matrix component (2) and quenching water spray assembly (3), two assemblies are held together by bolt by insulation joint sleeve (10);
Described inductor block matrix component (2), held together by welding, comprise effective induction coil (4), described actual induction circle (4) be circumferentially fixedly installed induction coil web plate (4a) and cylinder manifold (5), described induction coil web plate (4a) is connected with quenching water spray assembly (3); Described cylinder manifold (5) is connected with web plate (6), and cylinder manifold (5) clamps with induction hardening transformer (11) and is connected with bolt by described web plate (6); Described cylinder manifold (5) is also provided with for water composite cooling pipe joint (7), for the refrigerating unit of water composite cooling pipe joint (7) by hose connection lathe;
Described quenching water spray assembly (3), held together by welding, comprise water spray ring (8), water spray ring (8) be circumferentially fixedly installed water spray ring web plate (8a) and spray quench fluid tube joint (9), described spray quench fluid tube joint (9) connects hardening liquid pipeline.
2. as claimed in claim 1 for the quenching inducer of low-speed big live axle, it is characterized in that: the position of described induction coil web plate (4a) and water spray ring web plate (8a) along one_to_one corresponding on the axis of live axle (1), and is connected with insulation joint sleeve (10) between two web plates.
3. as claimed in claim 1 for the quenching inducer of low-speed big live axle, it is characterized in that: the inner ring of described water spray ring (8) is provided with several sprays quench cooled liquid water hole (8b).
4., as claimed in claim 1 for the quenching inducer of low-speed big live axle, it is characterized in that: the diameter of described spray quench cooled liquid water hole (8b) is φ 1.8, is interspersed in checkerboard.
5., as claimed in claim 1 for the quenching inducer of low-speed big live axle, it is characterized in that: all part materials of described inductor block matrix component (2) and quenching water spray assembly (3) are red copper T3.
6., as claimed in claim 1 for a method for determining size for the quenching inducer of low-speed big live axle, it is characterized in that: the steps include:
S1: the diameter phi 1 adapted size of actual induction circle 4 is determined: according to the maximum diameter need implementing induction hardened live axle 1
∮ 2 dimensional conditions, and the induction coil inwall required according to induction hardening process and live axle 1 are responded to spacing λ ' size and are determined that actual induction loop diameter φ 1 adapted size should be determined as follows:
φ1=
∮ 2 +2λ'；
S2: the diameter phi 2 adapted size of water spray ring 8 is determined: be according to implementing induction hardened live axle maximum diameter
∮ 2 spacing λ responded to by dimensional conditions and the water spray ring inwall required according to induction hardening process and part " size determined that i.e., effective water spray ring diameter phi 2 adapted size should be determined as follows:
φ2=
∮ 2 +2λ”；
S3: the water spray face tilt angle [alpha] adapted size of water spray ring 8 is determined: be according to implementing induction hardened live axle 1c1 place angle case α 1 and be determined according to the water spray ring water jet column of induction hardening process requirement and the surperficial angle α ' of part 1c1, namely, water spray ring water spray face tilt angle [alpha] adapted size, should be determined as follows:
α=
90-（α1+α'
）；
S4: upper surface and the actual induction circle 4 lower surface distance H adapted size of water spray ring 8 are determined: be according to implementing induction hardened live axle tooth bar place diameter
∮ 1 place dimensional conditions and according to induction hardening process require water spray ring upper surface and induction coil lower surface spacing size h
0determined, that is, water spray ring upper surface and induction coil lower surface distance H adapted size, should be determined as follows:
H=
∮ 1 +h
0。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510685049.XA CN105331792A (en) | 2015-10-21 | 2015-10-21 | Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510685049.XA CN105331792A (en) | 2015-10-21 | 2015-10-21 | Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105331792A true CN105331792A (en) | 2016-02-17 |
Family
ID=55282551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510685049.XA Pending CN105331792A (en) | 2015-10-21 | 2015-10-21 | Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105331792A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011397A (en) * | 2016-07-28 | 2016-10-12 | 长春北特汽车零部件有限公司 | Water-controlled quenching heat treatment method of 42CrMo bars |
| CN106011440A (en) * | 2016-07-28 | 2016-10-12 | 石家庄新莱特机械轧辊有限公司 | Quenching device for support roller path part of oversized excavator and quenching process |
| CN106244784A (en) * | 2016-07-28 | 2016-12-21 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching apparatus for thrust wheel of digging machine spindle nose collar |
| CN106244785A (en) * | 2016-07-28 | 2016-12-21 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching unit for thrust wheel of digging machine shaft head and technique thereof |
| CN108707726A (en) * | 2018-06-15 | 2018-10-26 | 山西北方机械制造有限责任公司 | 42CrMo steel mid frequency induction hardenings end face flawless technique |
| CN110016545A (en) * | 2019-05-21 | 2019-07-16 | 洛阳法拉地感应设备有限公司 | A kind of adapted method for determining size of flange class part Special quenching inductor |
| CN111270055A (en) * | 2020-03-17 | 2020-06-12 | 许仙福 | Adjustable quenching and heating device for quenching and tempering production line equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600873A (en) * | 2003-09-26 | 2005-03-30 | 上海纳铁福传动轴有限公司 | Equipment and method for induction hardening stepped shaft |
| CN201172668Y (en) * | 2008-04-02 | 2008-12-31 | 上海热处理厂有限公司 | Key groove long and thin shaft quenching induction apparatus |
| CN101509061A (en) * | 2009-03-27 | 2009-08-19 | 中国第一汽车集团公司 | Simultaneous induction quenching technology for flange-output shaft neck and end face |
| CN103589846A (en) * | 2013-11-05 | 2014-02-19 | 中国第一汽车股份有限公司 | Quenching inductor for double steps of steering joint and quenching method for steering joint |
| CN103667661A (en) * | 2013-11-29 | 2014-03-26 | 第一拖拉机股份有限公司 | Inductive heat treatment method of low-speed large-torque drive axle |
| CN205329121U (en) * | 2015-10-21 | 2016-06-22 | 第一拖拉机股份有限公司 | A quenching inductor for big moment of torsion drive axle of low -speed |
-
2015
- 2015-10-21 CN CN201510685049.XA patent/CN105331792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1600873A (en) * | 2003-09-26 | 2005-03-30 | 上海纳铁福传动轴有限公司 | Equipment and method for induction hardening stepped shaft |
| CN201172668Y (en) * | 2008-04-02 | 2008-12-31 | 上海热处理厂有限公司 | Key groove long and thin shaft quenching induction apparatus |
| CN101509061A (en) * | 2009-03-27 | 2009-08-19 | 中国第一汽车集团公司 | Simultaneous induction quenching technology for flange-output shaft neck and end face |
| CN103589846A (en) * | 2013-11-05 | 2014-02-19 | 中国第一汽车股份有限公司 | Quenching inductor for double steps of steering joint and quenching method for steering joint |
| CN103667661A (en) * | 2013-11-29 | 2014-03-26 | 第一拖拉机股份有限公司 | Inductive heat treatment method of low-speed large-torque drive axle |
| CN205329121U (en) * | 2015-10-21 | 2016-06-22 | 第一拖拉机股份有限公司 | A quenching inductor for big moment of torsion drive axle of low -speed |
Non-Patent Citations (1)
| Title |
|---|
| 马戈: "凸轮轴连续感应淬火的质量问题及解决措施", 《金属热处理》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011397A (en) * | 2016-07-28 | 2016-10-12 | 长春北特汽车零部件有限公司 | Water-controlled quenching heat treatment method of 42CrMo bars |
| CN106011440A (en) * | 2016-07-28 | 2016-10-12 | 石家庄新莱特机械轧辊有限公司 | Quenching device for support roller path part of oversized excavator and quenching process |
| CN106244784A (en) * | 2016-07-28 | 2016-12-21 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching apparatus for thrust wheel of digging machine spindle nose collar |
| CN106244785A (en) * | 2016-07-28 | 2016-12-21 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching unit for thrust wheel of digging machine shaft head and technique thereof |
| CN106011397B (en) * | 2016-07-28 | 2017-12-05 | 长春北特汽车零部件有限公司 | 42CrMo bars control water quenching heat-treatment technology method |
| CN106244785B (en) * | 2016-07-28 | 2018-04-10 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching technical for thrust wheel of digging machine shaft head |
| CN106244784B (en) * | 2016-07-28 | 2018-04-10 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching apparatus for thrust wheel of digging machine spindle nose collar |
| CN106011440B (en) * | 2016-07-28 | 2018-04-10 | 石家庄新莱特机械轧辊有限公司 | A kind of quenching unit and its technique for super-huge excavator support groove portion |
| CN108707726A (en) * | 2018-06-15 | 2018-10-26 | 山西北方机械制造有限责任公司 | 42CrMo steel mid frequency induction hardenings end face flawless technique |
| CN110016545A (en) * | 2019-05-21 | 2019-07-16 | 洛阳法拉地感应设备有限公司 | A kind of adapted method for determining size of flange class part Special quenching inductor |
| CN110016545B (en) * | 2019-05-21 | 2024-02-13 | 洛阳法拉地感应设备有限公司 | Method for determining matched size of quenching inductor special for flange parts |
| CN111270055A (en) * | 2020-03-17 | 2020-06-12 | 许仙福 | Adjustable quenching and heating device for quenching and tempering production line equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105331792A (en) | Quenching inductor for low-speed large-torque drive wheel axle and size confirmation method | |
| CN103667661B (en) | A kind of induction heat processing method of low-speed big live axle | |
| CN106141375B (en) | A kind of operating method of large-scale supporting roller built-up welding work station | |
| CN104070287A (en) | Method and device for restraining softening of high-strength aluminum alloy stirring friction welding joint | |
| CN206597797U (en) | Tile press | |
| CN103170777A (en) | Metal pipe butt-joint circumferential seam heating device | |
| CN106868267B (en) | A kind of D2Steel roll double frequency heat treatment quenching process and device | |
| CN103962425A (en) | Electric heating stretching-bending forming device for airplane titanium alloy sectional materials | |
| CN102154539A (en) | Gas type armored plate heating and press-quenching method | |
| CN106244785B (en) | A kind of quenching technical for thrust wheel of digging machine shaft head | |
| CN106011440B (en) | A kind of quenching unit and its technique for super-huge excavator support groove portion | |
| CN205329121U (en) | A quenching inductor for big moment of torsion drive axle of low -speed | |
| CN114147324B (en) | High-efficiency welding method for large-sized perforated flange and thick-wall pipe | |
| CN102115810A (en) | Induction-heating normalizing inductor and induction-heating normalizing process for drive bevel gear | |
| CN203229554U (en) | Ultra-large roller induction differential-temperature quenching machine | |
| CN105904111A (en) | Assembly process of tower sections for large-diameter wind-power tower tube | |
| CN202220188U (en) | Induction-heating automatic quenching and tempering production line for creeper thread | |
| CN113199110A (en) | Continuous annular automatic high-temperature fusion welding device for copper bar rotor of large and medium-sized motor | |
| CN107457509A (en) | A kind of limestone crushing roller wearing layer preheating surfacing device | |
| CN210104015U (en) | Industrial robot for quenching high-temperature forged parts | |
| CN202808872U (en) | Annular furnace heat treatment production line using multiple rings simultaneously | |
| CN102086619A (en) | Double-frequency equipment and process for normalizing rail welding seams | |
| CN105710498A (en) | Build-up welding technique for flange | |
| CN200939544Y (en) | Welding apparatus for large diameter roller | |
| CN203356863U (en) | Metal tube butt-joint circular seam heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160217 |
|
| RJ01 | Rejection of invention patent application after publication |