CN1060423C - Repairing method for tools and dies and repairing machine - Google Patents
Repairing method for tools and dies and repairing machine Download PDFInfo
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- CN1060423C CN1060423C CN94108743A CN94108743A CN1060423C CN 1060423 C CN1060423 C CN 1060423C CN 94108743 A CN94108743 A CN 94108743A CN 94108743 A CN94108743 A CN 94108743A CN 1060423 C CN1060423 C CN 1060423C
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Abstract
The present invention relates to a method and equipment for repairing the defects of tools and dies. The equipment is designed for meeting the practical requirement of maintenance industry. Patching sheet material is fixedly connected with a repaired position of a tool or a die by controllable pulse electric energy, a plurality of layers of the patching sheet material are orderly and fixedly connected and stacked with each other to form a blank, and then, a working surface is ground and restored. Patching sheets of appropriate size, thickness and material, and repairing voltage are selected according to the material, the structure, the working condition, the failure state, etc. of the tool or the die. A foot pedal switch can control a repairing machine to output high-energy short-time electric pulses, and the high-energy short-time electric pulses are output in a single-time mode or a sequence pulse mode. Thus, a surface repairing metal layer with no damage to base material, firm combination and modified action can be obtained.
Description
The present invention relates to a kind of be used to repair damaged method for repairing and mending of tool and mould and equipment.
Worker's moulds such as mould, forge hot pressing mold tool, die casting, cold-work die and stretching die, cost is higher owing to shape, moulding or pattern complexity, and as several ten thousand yuan of stamp pressure rollers, the large injection mold cost is higher.From economic benefit and social benefit, recover to use for there being damaged tool and mould will do to repair regeneration.
Tool and mould is damaged to comprise that cut, pore, point-like the wearing and tearing of small-sized damaged and the tool and mould arm of angle, three summits, salient point and blade such as peel off, peel off, collapse two classes damage such as damage.Wearing and tearing are method reparations of adopting the brush plating to repairing trades to small-sized property gradually, and rational restorative procedure is not found in the spalling damage at mould edges and corners place at present as yet.For a long time, repairing trades wishes to have a kind of technological equipment can provide reparation steel tool and mould spalling damaged means, generally require this repair member that high bond strength is arranged, simultaneously do not change the original bulk heat treatmet effect of tool and mould, thus the function of use that makes repair member near or reach degree before the not damage.
A kind of scheme that can adopt is: with the laser or the so concentrated energy of energy height of microplasma body, to be fused to the tool and mould mother metal with the approaching patching material of tool and mould performance gets on, not only can recover the tool and mould size, fill and lead up damaged, and, can not influence the whole result of use of tool and mould because the heat affected area is minimum.But under present technical conditions, the cost of power laser diode and microplasma body equipment is all than higher, and working service requires also high, is unsuitable for promoting the use of at maintenance industry.
In the face of the damage of the spalling of valuable tool and mould edges and corners, traditional processing method is to adopt pincers worker the insert embedding inlay technique or the bonding method of inserting, and this method is strongly professional, workman's technical merit is required high, time-consuming taking a lot of work.
The objective of the invention is to design a kind of new method and equipment of patcher's mould of practicality for maintenance industry, can repair the damage of aforementioned two class tool and moulds, implement that this method can obtain that the repair piece thermal deformation is little, the heat affected area is little, combination is firm, the maintenance original bulk heat treatmet effect of repair piece and the skin patching metal level of certain modifying function is arranged.And equipment investment is little, simple to operate.
Repair of moulds method of the present invention is to adopt the controllable pulse electric energy that patching material is fixedly connected on the tool and mould position that should repair, and multilayer is connected and is superimposed as base one by one, and reconditioning is shaped and restores the tool and mould working face again.Because the pulse electric energy of concentration of energy is provided to the repairing position by electrode at extremely short instantaneous (about 10ms), make that repairing the some position heats up rapidly in the time and then the fusing metallurgical binding at Millisecond, same again cooling rapidly, play a kind of atural beat treatment effect, therefore can realize purpose of the present invention.
Method for repairing and mending is to carry out following steps:
1) selects patching material for use according to material, structure, operating mode and the failure state of mould or instrument, mend the geometric shape of material, thickness and the repairing order that sheet is mended material, patching material comprises between hardness range HRC20～55, is used to repair the stainless steel system of anti-corrosion, heat-resisting and wear-resisting carbon steel, low-alloy steel, high-speed steel and cast iron matrix tool and mould, low-alloy steel system and hardness range HRC30～55, is used for the carbon steel of blade and wear-resisting repairing; The geometric shape of mending material is that sheet is thread or Powdered; The thickness that sheet is mended material is 0.10～0.20mm; Repair order and be fixedly connected respectively by the multilayer sticking patch, be superimposed as base;
2) mould or instrument and patching material are done oil removing degreasing preliminary treatment;
3) negative electrode with mould or instrument and repair of moulds machine fixes to clamp with anchor clamps;
4) cut out the sticking patch of corresponding size according to repair of moulds face size and shape, sticking patch is close to the repairing face of tool and mould;
5) set the repairing voltage percentage value of repair of moulds machine according to the benefit material of selecting, and slowly raise,, will mend material and be fixedly connected on the repairing face by being pressed on the electrode release current amplitude of mending on the material pulse electric energy greater than 3000A by low;
6) reconditioning is shaped and restores the tool and mould working face.
In the aforesaid operations step, the repair of moulds machine of correctly selecting sticking patch and sticking patch order for use and can producing the controllable pulse electric energy is the key technology that realizes this method for repairing and mending.
Repairing machine of the present invention is made of main circuit and control circuit, and main circuit is by the input charging control circuit, booster circuit, the capacitor energy storage circuit that are linked in sequence, and output charge/discharge control circuit and output pulse transformer circuit and electrode constitute; Control circuit comprises to main circuit to be provided the charging pulse formation circuit of input charging control and provides the discharge pulse of output discharge control to form circuit to main circuit, it is characterized in that:
Described input charging control circuit is one to be serially connected in the solid-state relay in the power supply input circuit;
Described output charge/discharge control circuit is one to be serially connected in the IGCT in the capacitor discharging circuit;
Described charging pulse forms circuit by first, second voltage comparator, saw-toothed wave generator and narrow pulse forming circuit connect and compose, the input of first voltage comparator, one end meets adjustable input direct voltage VR2, other end input meets the feedback voltage V f of main circuit storage capacitor, the output of first voltage comparator connects second voltage comparator and imports an end, saw-toothed wave generator output connects its input other end, the output of second voltage comparator connects narrow pulse forming circuit, and narrow pulse forming circuit output connects the control end of main circuit solid-state relay;
Described discharge pulse forms circuit and connects Vf respectively by input, the voltage comparator of VR2, the input string pin is stepped on the photoelectrical coupler of switch and the shaping time-delay differential circuit of photoimpact thereof, the monostable flipflop circuit, logic gates AN1, AN3, one end is connected with photoelectric coupler output end, single-point/continuous operation mode switch and output pulse transformer circuit that the other end is connected with gate AN3 one input connect and compose, another input of voltage comparator output termination gate AN3, the control end of gate AN3 output order steady state trigger circuit, output termination gate AN1 one input of monostable flipflop circuit, another input of shaping time-delay differential circuit output termination gate AN1 of photoimpact, the input of gate AN1 output termination output pulse transformer circuit, the output pulse transformer circuit output end connects described main circuit IGCT control end.
According to material, the structure of mould or instrument, operating mode and failure state are correctly selected for use and are mended material, technological parameter, repairing order and oil removing degreasing pretreating process, can not hindered base material, in conjunction with firmly, the skin patching metal level of modifying function arranged.Facts have proved, present technique be suitable for the tool and mould arm of angle, three summits, boss and blade wearing and tearing, peel off, collapse damage and cut, pore, point-like and small-sized damaged repairing such as peel off, compare with present existing skin patching technology and show unique characteristics.
Metallographic Analysis test through the patch area of implementing this method is done proves that single spot welding nuclear is cast sturcture, has realized that base material is connected with the spot welding of sticking patch or sticking patch interlayer, and single spot welding is examined to metallurgical and connected; The welding of many sticking patch multiple spot nuclear overlap is good, has eliminated the space between sheet, has formed shallow heat affected area, shallow fusion area, does not have the sticking patch superficial layer of distortion, and the patch interlayer is metallurgical the connection.
Describe technology of the present invention in detail below in conjunction with embodiment and accompanying drawing.
Fig. 1, repair of moulds electro-mechanical principle block diagram;
Repair of moulds machine main circuit is implemented circuit diagram among Fig. 2, Fig. 1;
Repair of moulds machine control circuit is implemented circuit diagram among Fig. 3, Fig. 1;
Fig. 4-1, shallow point end cut are repaired schematic diagram;
Fig. 4-2, pitting defect mending schematic diagram;
Fig. 5-1, dark point end cut are repaired schematic diagram;
Fig. 5-2, pit are repaired schematic diagram;
Fig. 6, shallow-layer peel off the repairing schematic diagram;
Fig. 7, deep layer step peel off the repairing schematic diagram;
Fig. 8, basil defect repairing schematic diagram;
Fig. 9, corner angle collapse to decrease repairs schematic diagram;
Figure 10, end are spherical cylindrical electrode structural representation;
Figure 11, end are trapezoidal rectangular electrode structural representation;
Figure 12, wedge electrode structural representation;
Figure 13, end are the rectangular electrode structural representation of arcs of recesses;
Figure 14, roller electrode structural representation.
Referring to Fig. 1, repair of moulds machine main circuit comprises input charging control circuit 10, boost rectifying circuit 11, capacitor energy storage circuit 12, output charge/discharge control circuit 13, output pulse transformer circuit 14 and repairs electrode 15.The signal that the floor push F.S that feedback voltage V f on 20 pairs of storage capacitors of control circuit, adjustable input direct voltage VR2, single-point/connection mode change-over switch S/C and control discharge are repaired is imported carries out logical operation, when voltage is lower than setting value on storage capacitor (Vf＜VR2), the CH line traffic control is connected input charging control circuit 10, make and insert the electrical network electric energy, finish and boost and energy storage; When repair operation, control circuit 20 is connected output charge/discharge control circuit 13 through the DCH line, to output transformer circuit 14 discharges, by electrode bar 15 output high energy single or train pulses.
In the control circuit 20, voltage comparator 203,204, saw-toothed wave generator 206 and the narrow pulse generator 205 synchronous with AC power constitute charging pulse formation circuit.When Vf＜VR2,204 outputs and the directly proportional square wave phase shift signals of voltage comparator 203 output signals become burst pulse is connected main circuit through the CH line traffic control input charging control circuit 10 again.Along with charging, Vf increases gradually, is stabilized in until voltage on the storage capacitor on the magnitude of voltage that is set by VR2, and charging process finishes.
By voltage comparator 201,202, the delay shaping differential circuit 211 of photoelectrical coupler 207, monostable flipflop circuit 208, output pulse transformer circuit 209, photoimpact and NAND gate AN1, AN3 constitute discharge pulse and form circuit.
Under the single-point mode of operation, the S/C switch disconnects, monostable flipflop 208 is not worked, closed pin is stepped on switch F.S, photoelectrical coupler 207 output pulse signals are through 211 shapings, delay, differential, by the pulse of pulse transformer circuit 209 output control main circuits discharge, the every closure of F.S once, single pulse of main circuit electrode 15 outputs.
S/C switch closure, repairing machine work under the continuous mode, the F.S switch closure, and photoelectrical coupler 207 work, circuit is carried out discharge process with aforementioned single-point pattern; When charging was finished once more, voltage comparator 201 output states changed, and triggered single-shot trigger circuit 208, produced the pulse signal of a proper width, through pulse transformer circuit 209, to the pulse signal of main circuit output control discharge.After each discharge end, charging are finished, all produce pulse signal and go to control the main circuit discharge,, realize tool and mould continued operation repairing, until disconnecting F.S so under continuous mode, repairing machine automatically charges, discharge cycles by single-shot trigger circuit.
In order to prevent that the main circuit storage capacitor can not be charged to desired value, wish that repairing machine has the charge and discharge interlock function, promptly forbid between charge period the discharge, interdischarge interval forbid the charging.The NAND Logic door AN2 that is provided with is blocked when the Vf of voltage comparator 201＜VR2, makes 209 pulses that can not export the discharge of control main circuit.
The delay circuit 210, voltage comparator 202, the NAND gate AN4 that are provided with have two kinds of functions, the one, overvoltage protection; The 2nd, in when discharge charging pulse is formed the circuit blockade of delaying time.The discharge beginning, the signal of delay circuit 210 output and when vf＞VR1, all can block NAND gate AN4 by the overvoltage signals of 202 generations, make charging pulse form 204 of circuit and can not export square-wave pulse with the sawtooth waveforms homophase, when delay time arrives the overpressure situation disappearance of discharge process end and Vf＞VR1, just allow charging.
Referring to Fig. 2, by solid-state relay SSR, step-up transformer B2, rectifier bridge D, storage capacitor C11, R53 form that input is controlled, boosted, rectification, charging accumulator; SSR conducting when SSR and BB ' have the pulse signal input, input circuit is connected in control.Through boost, rectification, C11 is charged.Resistor voltage divider circuit R54, R55 are attempted by the C11 two ends, and Vf goes up the voltage dividing potential drop with C11 and feeds back to control circuit.Solid-state relay SSR adopts enhancement mode to connect, and external circuit has piezo-resistance Y1 protection, the electrical network feedback is disturbed minimum.
IGCT SCR, pulse transformer B3, R57, D10 constitute the output charge/discharge control circuit, when SCR is triggered conducting (AA ' have pulse signal), discharge circuit is connected in control, and pulse transformer B3 exports high energy pulse, has output concentration of energy and the fast advantage of the velocity of discharge.IGCT SCR triggers the transformer isolation mode that adopts.
The combining structure of SSR device and SCR is adopted in main circuit control, have be convenient to control, overload capacity is strong, the advantage of reliable operation.
Referring to Fig. 3, transport and placing device OP3 is connected into proportional controller, constitute charging control circuit 203, transport and placing device OP4 constitutes the voltage comparator 204 that charging pulse forms circuit, transport and placing device OP5, OP6 and T6, R32～R35, R46, R47, C8, C9 constitute saw-tooth wave generating circuit 206, the interchange 5V of input is converted into the zig-zag synchronous with power supply, adds to the inverting input of transport and placing device OP4 through R45.C6, R48～R50, R58, R59, T7, T8, pulse transformer B4 constitute narrow pulse forming circuit, the end of the same name of B4 output BB ' map interlinking 2 solid-state relay SSR.
Connect power supply, adjustable potentiometer W2 exports a given DC voltage VR2, adds to the inverting input of OP3 and meets Vf through the in-phase input end that R18 adds to inverting input OP1-OP3 of OP1 through R23.After the start repair operation discharge, Vf=0, the OP3 output voltage adds to the in-phase input end of OP4 through R21, OP4 output and the directly proportional square wave phase shift signal of this signal, BB ' output burst pulse drives solid-state relay SSR conducting, boosts, rectification, charging; Along with Vf rises, the SSR angle of flow reduces gradually, and last C11 goes up voltage and is stabilized on the magnitude of voltage that is set by VR2, and so far charging process finishes.While comparator OP1 output HIGH voltage, T3 conducting, light emitting diode D5 light, and the indication charging finishes, and can carry out repair operation.
Photoelectrical coupler 207 adopts PC817.Two-stage monostable flipflop CD4528 constitutes monostable flipflop circuit 208.T1, T2, R37-R40, D2, D3, C4, pulse transformer B1 constitute output pulse transformer circuit 209.AA ' is map interlinking 2 IGCT SCR trigger electrode and negative electrodes respectively.NAND gate AN5, phase inverter N1～N3, R43, R44, C7, W4, D4 constitute delay circuit 210.R3, R7～R9, C1, D1, N5 constitute shaping, delay, the differential circuit 211 of photoimpact.
Under the single-point mode of operation, the S/C switch disconnects, and monostable flipflop CD4528 does not work.Closed F.S switch, photoelectrical coupler PC817 exports pulse, through shaping, time-delay, differential, by the pulse of triode T1, T2 and pulse transformer B1 output control discharge.At this moment, light emitting diode D2 lights, the indication discharge condition.The every closure of F.S is once exported a single pulse.
Under continuous operation mode, the S/C switch closure, monostable flipflop CD4528 starts working, and when closed F.S, the generative process of first discharge control impuls is identical with above-mentioned single-point pattern.After charging was finished once more, OP1 exported high level, and the T3 conducting is sent a triggering signal through anti-phase the end to monostable flipflop 1B of N4, and the pulse signal of monostable output certain width through NAND gate AN1, AN2, drives T1, T2 and B1.Therefore after finishing, each discharge end, charging all produce the pulse signal of main control discharge, up to release F.S switch by single-shot trigger circuit.
During charging, Vf＜VR2, the OP1 output low level, T3 ends, and the N4 output low level is blocked NAND gate AN2, makes it to export the pulse of control discharge, forbids discharge when promptly realizing charging, until Vf＞VR2.
When the pulse of control discharge each time produces, inverse gate N2 output low level in the delay circuit 209 is blocked NAND gate AN4, forbids charging when promptly buying existing discharge, until discharge off and after the time-delay process finishes, N2 output recovers high level and just allows charging.During the T5 conducting, light emitting diode D7 lights indication and forbids charging.
Transport and placing device OP2, T4, R15-R17, R19, R20, W1, D6 and NAND gate AN4 constitute overvoltage crowbar.Adjust to allow the maximum charging voltage VR1 of capacitor C 11 by W1, when Vf＞VR1, OP2 export high level, and NAND gate AN4 is blocked in the T4 conducting, promptly prohibits to show and generate the pulse that control is charged, and light emitting diode D6 lights the indication overvoltage condition.
C3, R26 in the adjusting monostable flipflop circuit and the W4 in the delay circuit, the gap periods that can regulate the pulse of continuous discharge pattern time series, the cycle in pulse spacing of embodiment can be set between 0.2～2 second.
Repair layer with method for repairing and mending acquisition of the present invention, its performance is decided by patching material and the technology selected for use, therefore mainly should consider tool die material, condition of heat treatment, failure site and pattern, operating mode and specification requirement etc. in the repairing technique, choose reasonable is mended material, repair technology and parameter etc.
Patching material provided by the invention can be divided into regard to its geometric shape that sheet is mended material, thread benefit material (look the damaged shape of tool and mould and select for use respectively, and sheet commonly used is mended material by φ 0.05-0.4mm) and Powdered benefit material (150 orders-300 order) three classes.Thread benefit material is usually used in long narrow damaged repairing, and Powdered benefit material is applicable to hole, the damaged repairing in hole.Following table is provided for the chemical analysis and the performance of the Powdered and thread benefit material of mould repairing.
| The title sequence number | Ni | Cr | B | Si | Fe | C | Hardness HRC | Purposes |
| 1 | Surplus | 15—20 | 3—4．5 | 3．5—5．5 | ＜5 | 0．5—1．1 | 55—60 | Wear-resisting, anti-corrosion |
| 2 | Surplus | 14—17 | 2．5—4 | 3．5—5 | ＜5 | 0．4—0．9 Co2—4 | 50—60 | Anti-corrosion, heat- |
| 3 | Surplus | 7—10 | 1．5—2．5 | 2—3．5 | ＜4 | ＜0．4 | 30—40 | Good toughness, wear-resisting, shock resistance are used for mould of plastics, glass mold |
| 4 | Surplus | 5—10 | 1—2．5 | 2—3．5 | ＜10 | ＜0．2 0．4 | 20—30 | The same |
| 5 | Co is surplus | 19 | 2．6 | 4．2 | ≤15 | Ni27 Mo6 0．8—1 | 50 | High-strength die |
| 6 | Co is surplus | 26—30 | 0．7—1 | ＜5 | Ni2—3 W5—6．5 | 30—38 | Mould |
Different tool die materials have the patching material that adapts separately, and different patching materials have different hardness, wearability, corrosion resistance and hear resistance, can select with reference to following table.
| Tool die material | Patching material | Hardness HRC | Characteristic |
| Carbon steel | Stainless steel | 21 | Mend flat, anti-corrosion, heat-resisting |
| Low-alloy steel | Stainless steel | 55．5 | Mend flat, wear-resisting, anti-corrosion, cutting edge |
| High-speed steel | The low-alloy steel high-speed steel | 31．5—54 57．5 | Mend flat, wear-resisting, flat, wear-resisting, the cutting edge of cutting edge benefit |
| Casting pig | Stainless steel | 21 | Mend flat, anti-corrosion, heat-resisting |
Stainless steel series, low-alloy steel series mends that the material hardness range is big, and HRC is easy to the reconditioning moulding at 20-55, is suitable for repairing the tool and mould of anti-corrosion, heat-resisting and wear-resisting carbon steel, low-alloy steel, high-speed steel and cast iron matrix and mends flat sub-district damaged; Carbon steel series is mended material hardness HRC30-55, and the utmost point is suitable for the repairing of wear-resisting and blade.
Some special tool and mould, tool and mould as easy hardening break, good nickel material, the austenitic stainless steel patching material of the optional weldability of bottom patching material made transition zone, and all the other each layers or cutting edge or position, high huttriall select for use high rigidity to mend material again, promptly select the repair layer of composite construction for use.
Mend the material except rationally selecting for use, also to select the thickness and the suitable size of cutting of suitable sticking patch according to the room situation of filling a vacancy for use, sticking patch thickness range 0.10-0.20mm, the ground floor sticking patch of repairing damaged face should be selected the sticking patch of 0.05 thin-0.10mm, yielding applying for use.
The sticking patch order will design according to tool and mould defect and geomery, and Fig. 4 to Fig. 9 example goes out 8 kinds of sticking patch order.Figure 10 to Figure 14 illustrates the electrode pen of 5 kinds of shapes.
Will be when repair scratching according to the degree of depth, width and the specification requirement that scratch, with under the sticking patch material into strips or select thread benefit material.As shown in figure 10 available to shallow and wide scuffing, the end is spherical cylindrical electrode pen; Trapezoidal rectangular electrode is processed in, end available as shown in figure 11 to narrow and shallow scuffing; Available as shown in figure 12 to narrow and dark scuffing, as a cylindrical end to be processed into wedge shape electrode.For the V-type scar at the shallow point end shown in Fig. 4-1 or as Fig. 4-2 shown in the pitting defective, should be earlier that sticking patch welding around the groove of hole is fixing, pressurization makes the sticking patch distortion above the groove of hole then, compresses with the electrode bar angle again and switches on, shown in Fig. 4-2.For dark the point big V-type scar or the pit at the end, divide several times and repair with the multilayer sticking patch, shown in Fig. 5-1 and Fig. 5-2, promptly successively be connected and be superimposed as base.Patch size directly influences repairing quality when repairing pit, should at first process the sticking patch material by pit diameter, and for the dark and less pit of diameter, the sticking patch diameter must not make every layer of sticking patch that mends all more smooth greater than the diameter of pit.If sticking patch greater than the diameter of pit, is repaired to the end, the centre of pit easily produces the gap.The general cylindrical electrode of using as shown in figure 10 when repairing pit, body diameter is decided on the size of pit.
When repairing surfacial spalling, make the shape of sticking patch identical with the shape of peeling off the position, if differ too big, all to enlarge some after every layer of repairing and repair area or produce the gap, can adopt the indentation method blanking, be about to paper and peeling off the position with hand in the place, edge, the shape of peeling off the position just is imprinted on the paper, cut by impression with scissors again and be attached on the sticking patch, the shape of pressing paster with under the material of sticking patch well, peel off referring to the shallow-layer of Fig. 6 and to repair and the deep layer step of Fig. 7 peels off repairing.
Undermine sword for collapsing of corner angle, angle damaged is as Fig. 8, shown in Figure 9.At first to add the technology operation by repairing power then by good sticking patch material under the width of damaged location and the length, can not be with the end of electrode pen when repairing corner angle, be with its cylinder position; Each layer sticking patch is the conversion that utilizes electrode pen angle when rolling, and salty one of shape is repaired the plane, and the corner angle after the benefit are answered camber, non-trimming, as shown in Figure 9.For the higher worker's module of precision, when repairing, be not damaged or burn in order to guarantee non-repair surface, can utilize bigger patch to repair ground floor, utilize sticking patch will wait that the non-repairing face around the face of repairing watch protects, prevent the electrode non-repairing face of burn that slides.When the repairing corner angle collapse damage, for preventing the non-repairing of electrode slip burn surface, also the electrode pen can be processed into rectangle, arcs of recesses is processed in the end.As shown in figure 13.Roller electrode shown in Figure 14 can be implemented the repairing to face of cylinder tool and mould on lathe.
For metallurgical imperfection, majority is slag inclusion and pore, should clear up rejected region earlier before repairing.The metal surface that processing makes new advances, promptly the oxide skin at removal of defects position and sand grains can be made patch work.
During repairing, the basic principle of repairing the voltage setting is slowly to be raise by low.Along with the raising of electrode voltage percentage, the some nuclear diameter increases, but that overtension sticking patch material is beaten arc is often breakdown.Minimum voltage limit when following table is listed the perforation of diameter 3mm electrode sticking patch and some nuclear diameter.
| Sticking patch thickness (mm) | 30% nuclear diameter of voltage | 40% nuclear diameter of voltage | 50% nuclear diameter of voltage | 60% nuclear diameter of voltage | 70% nuclear diameter of voltage | 80% nuclear diameter of voltage |
| 0．10 | 0．67 | 0．67 | 0．67 | Perforation | Perforation | Perforation |
| 0．15 | 0．66 | 0．70 | 0．70 | 0．79 | Perforation | Perforation |
| 0．20 | 0．38 | 0．63 | 0．67 | 0．76 | 0．80 | Perforation |
As seen from the above table, when using the electrode of φ 3mm, for the thick sticking patch of 0.10mm, the optimum voltage percentage value is 50%; For the thick sticking patch of 0.15mm, the optimum voltage percentage value is 60%; For the thick sticking patch of 0.20mm, the optimum voltage percentage value is 70%.The point nuclear diameter is in 0.60～0.80mm scope.
The basic principle of this method for repairing and mending is: voltage is set and is generally 50%～70%, and small-sized mother metal and small pieces thin material are set between 30%～40%, and the repairing voltage on mother metal sheet and three summits is between 40～50%.
This method for repairing and mending is that a kind of controllable pulse electric energy that adopts is fixed on the technology that tool and mould should be repaired the position to patching material, its repairing principle is that the metallurgy that solder joint casting point karyomorphism becomes connects mechanism, the bonding strength height, solder joint heat affected area 0.2～0.5mm, the base material fusion penetration is extremely shallow, spot size 0.6～0.8mm.
Claims (3)
1, a kind of repair of moulds method, carry out following steps:
1) select for use patching material, the geometric shape of mending material, sheet to mend the thickness and the repairing order of material according to material, structure, operating mode and the failure state of mould or instrument, patching material comprises between hardness range HRC20～55, is used to repair the stainless steel system of anti-corrosion, heat-resisting and wear-resisting carbon steel, low-alloy steel, high-speed steel and cast iron matrix tool and mould, low-alloy steel system and hardness range HRC30～55, is used for the carbon steel of blade and wear-resisting repairing; The geometry of mending material is that sheet is thread or Powdered; The thickness that sheet is mended material is 0.10～0.20mm; Repair order and be fixedly connected respectively by the multilayer sticking patch, be superimposed as base;
2) mould or instrument and patching material are done oil removing degreasing preliminary treatment;
3) negative electrode with mould or instrument and repair of moulds machine fixes to clamp with anchor clamps;
4) cut out the sticking patch of corresponding size according to repair of moulds face size and shape, sticking patch is close to the repairing face of tool and mould;
5) set the repairing voltage percentage value of repair of moulds machine according to the benefit material of selecting, and slowly raise,, will mend material and be fixedly connected on the repairing face by being pressed on the electrode release current amplitude of mending on the material pulse electric energy greater than 3000A by low;
6) reconditioning is shaped and restores the tool and mould working face.
2, a kind of repair of moulds machine with the described method patcher's mould of claim 1, constitute by main circuit and control circuit, main circuit is by the input charging control circuit, booster circuit, the capacitor energy storage circuit that are linked in sequence, and output charge/discharge control circuit and output pulse transformer circuit and electrode constitute; Control circuit comprises to main circuit to be provided the charging pulse formation circuit of input charging control and provides the discharge pulse of output discharge control to form circuit to main circuit, it is characterized in that:
Described input charging control circuit is one to be serially connected in the solid-state relay in the power supply input circuit;
Described output charge/discharge control circuit is one to be serially connected in the IGCT in the capacitor discharging circuit;
Described charging pulse forms circuit by first, second voltage comparator, saw-toothed wave generator and narrow pulse forming circuit connect and compose, the input of first voltage comparator, one end meets adjustable input direct voltage VR2, other end input meets the feedback voltage V f of main circuit storage capacitor, the output of first voltage comparator connects second voltage comparator and imports an end, saw-toothed wave generator output connects its input other end, the output of second voltage comparator connects narrow pulse forming circuit, and narrow pulse forming circuit output connects the control end of main circuit solid-state relay;
Described discharge pulse forms circuit and connects Vf respectively by input, the voltage comparator of VR2, the input string pin is stepped on the photoelectrical coupler of switch and the shaping time-delay differential circuit of photoimpact thereof, the monostable flipflop circuit, logic gates AN1, AN3, one end is connected with photoelectric coupler output end, single-point/continuous operation mode switch and output pulse transformer circuit that the other end is connected with gate AN3 one input connect and compose, another input of voltage comparator output termination gate AN3, the control end of gate AN3 output order steady state trigger circuit, output termination gate AN1 one input of monostable flipflop circuit, another input of shaping time-delay differential circuit output termination gate AN1 of photoimpact, the input of gate AN1 output termination output pulse transformer circuit, the output pulse transformer circuit output end connects described main circuit IGCT control end.
3, repair of moulds method according to claim 1 is characterized in that: described electrode pen comprises that the end is spherical cylindrical electrode pen; Trapezoidal rectangular electrode pen is processed in the end; One end is processed into the electrode pen that the cylindrical electrode pen of wedge shape, rectangular electrode pen that arcs of recesses is processed in the end and end are roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94108743A CN1060423C (en) | 1994-07-29 | 1994-07-29 | Repairing method for tools and dies and repairing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94108743A CN1060423C (en) | 1994-07-29 | 1994-07-29 | Repairing method for tools and dies and repairing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1100356A CN1100356A (en) | 1995-03-22 |
| CN1060423C true CN1060423C (en) | 2001-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94108743A Expired - Fee Related CN1060423C (en) | 1994-07-29 | 1994-07-29 | Repairing method for tools and dies and repairing machine |
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| Country | Link |
|---|---|
| CN (1) | CN1060423C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100444990C (en) * | 2004-04-13 | 2008-12-24 | 周照耀 | Method for repairing parts by using metal liquid to fill in interspaces in parts and application |
| CN102861826A (en) * | 2012-09-13 | 2013-01-09 | 长春轨道客车股份有限公司 | Stretch bent mold sticking repairing method |
| CN109648183A (en) * | 2017-10-10 | 2019-04-19 | 长城汽车股份有限公司 | Cold-patch electrode welder head |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039081U (en) * | 1988-10-13 | 1989-06-07 | 合肥工业大学 | Dual-purpose power supply for strong d.c. and pulse |
| CN2095056U (en) * | 1991-08-07 | 1992-02-05 | 山西省太行锯条厂 | Sawtooth welder for diamond circular saw |
| CN1023595C (en) * | 1991-04-13 | 1994-01-26 | 机械电子工业部苏州电加工机床研究所 | Electrospark lapping and polishing method and equipment thereof by using ultrasonic vibration |
-
1994
- 1994-07-29 CN CN94108743A patent/CN1060423C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039081U (en) * | 1988-10-13 | 1989-06-07 | 合肥工业大学 | Dual-purpose power supply for strong d.c. and pulse |
| CN1023595C (en) * | 1991-04-13 | 1994-01-26 | 机械电子工业部苏州电加工机床研究所 | Electrospark lapping and polishing method and equipment thereof by using ultrasonic vibration |
| CN2095056U (en) * | 1991-08-07 | 1992-02-05 | 山西省太行锯条厂 | Sawtooth welder for diamond circular saw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1100356A (en) | 1995-03-22 |
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