CN107855453B - A kind of forging die for combining die-forging forming - Google Patents
A kind of forging die for combining die-forging forming Download PDFInfo
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- CN107855453B CN107855453B CN201710978294.9A CN201710978294A CN107855453B CN 107855453 B CN107855453 B CN 107855453B CN 201710978294 A CN201710978294 A CN 201710978294A CN 107855453 B CN107855453 B CN 107855453B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/72—Making machine elements hooks, e.g. crane hooks, railway track spikes
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Abstract
The invention discloses a kind of straight forging die of heat of joint die-forging forming and thermal flexure forging dies, heat is straight, and forging die includes pulling and flattening blocker, diagonal form lock, blocker, blocking flash gutters, finish impression, finish-forging flash gutters, does not entirely reach the suspension hook flat shape semi-finished product forging part that final shape and size require for obtaining；Thermal flexure forging die includes prebuckling impression, the compound lock of whole edger and single vertical double angles, for obtaining the suspension hook forging part for thoroughly reaching shape and size and requiring.The present invention has technical feasibility, reliability, economic rationality, safety in utilization, efficiently solves joint die-forging forming method poor reliability existing " being bent on base, 20kN die forging hammer die forging and 3150kN clipping press on 10kN flat-die hammer ", the problems such as geometric tolerance and dimensional tolerance precision are low, accepted product percentage is low, deformation force is big, low efficiency, Service Life of Forging Die are low.
Description
Technical field
The invention belongs to technical field of forging, and in particular to a kind of forging die for combining die-forging forming.
Background technique
By taking Large-power High-Speed diesel engine suspension hook part die forging as an example, existing suspension hook joint 3 big steps of contour forging technique process point:
1. base step: blank heating → base shapes on 10kN flat-die hammer；2. swaging step: base blank heating → in 20kN
Directly finish-forging shape → is cut on the edger in 3150kN clipping press equipment on the straight forging die of heat on die hammer
Side；3. bending step: semi-finished product forging part heat → is finally bent on the thermal flexure mould in 3150kN clipping press equipment
Forming.Therefore, existing suspension hook contour forging technique process is complicated, and (technical feasibility is poor, reliability is poor and economic conjunction for poor reliability
Rationality is poor), dimensional accuracy is low (can only achieve as defined in GB/T12362 " steel forging part tolerance and machine-finish allowance " common
Class precision), accepted product percentage low (GB/T12362 regular grade forging part accepted product percentage≤50%), big (the especially die forging of deformation force
The deformation force of last 3 hammer time of the finish-forging process of step is bigger), low efficiency (wherein base step, swaging step and bending step
Heating fire time is 3~4 times/part, and the total cycle of the forming of base step and swaging step is at least 15 hammers/part, bending step
Rapid forming number be 1 time/part), Service Life of Forging Die it is low less than 0.4 ten thousand/set etc. problems.
If suspension hook uses " multistation extruder, multistation upsetter forging press, multicored forging press, crank hot forging
" accurate, efficient or program-controlled " such as press machine, electric screw drop press, high efficient servo hydraulic press, program-controlled die forging electrohydraulic hammers " sets
The standby first line of a couplet molds forging forming process method, then is easier to overcome that above-mentioned poor reliability, dimensional accuracy are low, accepted product percentage is low, deformation force
Greatly, the disadvantages such as low efficiency, Service Life of Forging Die be low.
But " base, 20kN die forging on 10kN flat-die hammer in existing " non-accurate, non-efficient or non-program-controlled " equipment
Be bent on hammer die forging and 3150kN clipping press " joint die forging forming process method, even reaching suspension hook forging part
The requirement of GB/T12362 plain grade is also extremely difficult, let alone reaches GB/T12362 micron order required precision, it is also difficult to
Get rid of the passive offices such as above-mentioned poor reliability, dimensional accuracy are low, accepted product percentage is low, deformation force is big, low efficiency, Service Life of Forging Die are low
Face.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is providing a kind of forging die for combining die-forging forming, effectively solve existing
The joint die-forging forming side of " being bent on base, 20kN die forging hammer die forging and 3150kN clipping press on 10kN flat-die hammer "
The poor reliability of method, geometric tolerance and dimensional tolerance precision are low, accepted product percentage is low, deformation force is big, low efficiency, Service Life of Forging Die
Low problem.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of forging dies for combining die-forging forming comprising: forging that heat is straight
Mould and thermal flexure forging die, heat is straight heat straight die-forging forming of the forging die for suspension hook joint precision die forging forming technology, thermal flexure
Thermal flexure die-forging forming of the forging die for suspension hook joint precision die forging forming technology；Heat is straight, and forging die includes pulling and flattening base
Impression 1, diagonal form latch 2, blocker 3, blocking flash gutters 4, finish impression 5, finish-forging flash gutters 6, hot straight die-forging forming
Include: by round steel blank be heated to process stipulation initial forging temperature, the pulling of heat straight forging die with flatten base on blocker,
Blocking forming, finish-forging forming, the trimming in edger in the straight forging die finish impression of heat in the straight forging die blocker of heat,
Obtain semi-finished product forging part；Thermal flexure forging die includes prebuckling impression, the compound lock of whole edger and single vertical double angles, hot bending
Bent die-forging forming includes: that semi-finished product forging part is heated to initial forging temperature, then again indulges the straight semi-finished product forging part of suspension hook heat
Carry out prebuckling to being horizontally placed in prebuckling impression, finally carry out whole bending in thermal flexure forging die finish impression, obtain at
Product forging part.
Wherein, the pulling and flattening 1 longitudinal arrangement of blocker, positioned at the left back portion of the straight forging die of heat；It is described diagonal
Type latches 2 longitudinal arrangements, positioned at the left front portion and right rear portion of the straight forging die of heat；It is flat to be located at heat for 3 longitudinal arrangement of blocker
Left back portion in straight forging die；The blocking flash gutters 4 are located at the surrounding of blocker 3；5 longitudinal arrangement of finish impression, position
It is opposite with 3 orientation of blocker in the middle right front portion of the straight forging die of heat；The finish-forging flash gutters 6 are located at finish impression 5
Surrounding.
Wherein, the pulling is shaped for suspension hook pulling with base is flattened with flattening blocker 1, is wedge symmetrical above and below
The compound pulling structure of type+flat pattern+wedge type has the continuous dual function for promoting pulling and flattening base, provides shape for blocking
Prepare with size.
Wherein, diagonal form lock 2 is for controlling forging die guiding, and for left and right single pair angle-style buckle structure, lock is perpendicular
Straight male and female face unilateral side guiding fit clearance is 0.5mm, and upper and lower male and female face anti-interference fit clearance is 1.0mm.
Wherein, the blocker 3 is for the straight die-forging forming of suspension hook semi-finished product blocking heat, shape and size with hang
The shape of hook semi-finished product blocking hot mould-forging piece is corresponding with size, 3 depth of blocker be greater than 5 depth 1.5mm of finish impression~
2.0mm。
Wherein, the blocking flash gutters 4 are taper structure symmetrical above and below, surround 3 horizontal direction four of blocker
In week, wherein wedge type angle is 15 °, and inlet thickness H is 12mm, and entrance circular angle radius r is 8mm, width 20mm, to accommodate blocking
The excess metal that impression 3 squeezes out.
Wherein, the prebuckling impression is located at the right rear portion of thermal flexure forging die；Whole edger is located at thermal flexure forging die
Left back portion；The compound lock 16 in single vertical double angles is located at the positive front of thermal flexure forging die.
Wherein, the prebuckling impression include pre- straight located cavity 7, it is prebuckling positioning convex platform 8, prebuckling cavity plate 9, pre-
High cavity 11 is determined in bending punch 10 and prebuckling；Pre- straight located cavity 7 is being placed in for the straight forging part of suspension hook semi-finished product heat
The top rake of rear and front end portion positioning before lower die bending, front end depth and the setting of rear end depth baseplane is 2 °~3 °,
Pattern draft and fillet half at pattern draft and radius of corner and the corresponding straight forging shank semicircle of heat at the semicircle of rear end
Diameter matches；Prebuckling positioning convex platform 8 is for the positioning during the straight forging part prebuckling of suspension hook semi-finished product heat, rear end fillet
Pattern draft is 3 °, rear end radius of corner size and corresponding hot flat shape semi-finished product forging part V-type recess radius of corner ruler
Very little to match, left and right side is without pattern draft；Prebuckling cavity plate 9 takes out prebuckling hot-die for prebuckling forming, receiving and clamping
Forging, pre-bend shape and size and corresponding prebuckling hot mould-forging piece diagram shape are identical as size；Prebuckling punch-pin 10 is used
It is shaped in prebuckling hot mould-forging piece upper bend and transmits bending deformation power, pre-bend shape and size and corresponding prebuckling
Hot mould-forging piece diagram shape is identical as size；The prebuckling determines high cavity 11 for the fixed high fixed with auxiliary of prebuckling forming
Position, working depth size are identical as the height dimension of prebuckling hot forging corresponding after prebuckling.
Wherein, the whole edger includes whole positioning convex platform 12, whole bending die 13, whole bending punch 14 and bending eventually
Fixed high cavity 15；Whole positioning convex platform 12 is for the pre- thermal flexure hot mould-forging piece of suspension hook to be placed in lower die curved fixed all around eventually
Position, rear end fillet pattern draft are 3 °, the V-type recess fillet half of rear end radius of corner size and hot flat shape semi-finished product forging part
Diameter size matches, and left and right side is without pattern draft；It is curved eventually that whole bending die 13 is used for whole bending forming, receiving and clamping taking-up
Bent hot mould-forging piece, shape and size and corresponding whole bending hot mould-forging piece diagram shape are identical as size, but bending angle compares institute
The corresponding hot-die part figure bending angle of bending eventually is 1 ° small, and curved bottom depth is than corresponding whole bending hot-die part figure curved bottom
The big 1.0mm of depth；Whole bending punch 14 for being bent the deformation of hot mould-forging piece upper bend and transmitting bending deformation power, bending circle eventually
Angular radius is identical with corresponding whole bending hot-die part figure curved radius radius, bending angle and corresponding whole bending hot-die part
Figure bending angle is 1 ° small；Whole bending punch 14 and the single side face fit clearance of 13 vertical direction of whole bending die are 3.0mm；It is curved eventually
Qu Dinggao cavity 15 is used for the fixed high and auxiliary positioning of whole bending forming, and working depth size and end corresponding after bending eventually are curved
The height dimension of bent hot forging is identical.
Wherein, the vertical double compound locks 16 in angle of the list are used for the compound direction of thermal flexure forging die, latch vertical male and female face
Unilateral side guiding fit clearance is 0.5mm, and upper and lower male and female face anti-interference fit clearance is 1.0mm.
(3) beneficial effect
(1) the straight forging die of heat and thermal flexure forging die of a kind of joint die-forging forming of the invention, effectively solves existing
The joint die-forging forming side of " being bent on base, 20kN die forging hammer die forging and 3150kN clipping press on 10kN flat-die hammer "
The problems such as poor reliability, the dimensional accuracy of method are low, accepted product percentage is low, deformation force is big, low efficiency, Service Life of Forging Die are low.
(2) the straight forging die of heat and thermal flexure forging die of a kind of joint die-forging forming of the invention, has technical feasibility, matter
Reliability, economic rationality, safety in utilization are measured, " steel forging part is public by GB/T12362 for geometric tolerance and dimensional tolerance precision
Difference and machine-finish allowance " regular grade becomes the deformation force of micron order, especially swaging step from large to small, improve forging efficiency
At least 1 times, heat is straight, and Service Life of Forging Die/covers by less than 0.4 ten thousand and is increased to 0.8 ten thousand/set, thermal flexure Service Life of Forging Die
Up to 70,000/set.
(3) the straight forging die of heat and thermal flexure forging die of a kind of joint die-forging forming of the invention, can also be other similar shapes
Shape and the forming of size forging part provide solid reference.
Detailed description of the invention
Fig. 1 a is embodiment suspension hook forging part front view schematic diagram involved in the present invention；
Fig. 1 b is the left view of Fig. 1 a；
Fig. 1 c is the top view of Fig. 1 a；
Fig. 2 a is the straight forging die of heat of the invention (including upper die and lower die) installation diagram front view schematic diagram；
Top view (removing the upper mold in Fig. 2 a) schematic diagram that Fig. 2 b is Fig. 2 a；
In figure, 1- pulling and flattening blocker, 2- diagonal form lock, 3- blocker, 4- blocking flash gutters, 5- finish-forging
Impression, 6- finish-forging flash gutters；
Fig. 3 a is the straight blocking hot forging front view schematic diagram of suspension hook heat involved in the present invention；
Fig. 3 b is the left view of Fig. 3 a；
Fig. 4 a is the straight finish-forging hot forging front view schematic diagram of suspension hook heat involved in the present invention；
Fig. 4 b is the left view of Fig. 4 a；
Fig. 5 a is thermal flexure forging die (including upper die and lower die) installation diagram front view schematic diagram；
Fig. 5 b is the upper mold K direction view in the A-A cross-sectional view of Fig. 5 d and the B-B cross-sectional view of Fig. 5 e；
Top view (removing the upper mold in Fig. 5 a) schematic diagram that Fig. 5 c is Fig. 5 a；
A-A cross-sectional view that Fig. 5 d is Fig. 5 c (comprising in Fig. 5 a upper mold and comprising whole bending punch, whole bending die,
The compound lock in single vertical double angles)；
The B-B cross-sectional view that Fig. 5 e is Fig. 5 c is (recessed comprising the upper mold in Fig. 5 a and comprising prebuckling punch-pin, prebuckling
Mould, the compound lock in single vertical double angles)；
In figure, the pre- straight located cavity of 7-, 8- prebuckling positioning convex platform, 9- prebuckling cavity plate, 10- prebuckling punch-pin,
High cavity, 12- end positioning convex platform, 13- end bending die, 14- end bending punch, 15- are determined in 11- prebuckling, and bending is fixed high recessed eventually
The compound lock in the mono- vertical double angles chamber, 16-；
Fig. 6 is the bending hot forging front view schematic diagram eventually of suspension hook involved in the present invention；
Fig. 7 is suspension hook prebuckling hot forging front view schematic diagram involved in the present invention.
Specific embodiment
In order to keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
A kind of forging die of joint die-forging forming of the invention includes the straight forging die of heat and thermal flexure forging die, is directed to suspension hook respectively
First time of joint precision die forging forming technology hot straight die-forging forming and second of thermal flexure die-forging forming and design.
(1) it the straight die-forging forming of first time heat: needs to realize by 1 set of straight forging die of heat, i.e., by round steel blank heating
Base on blocker is pulled out and flattened, in the straight forging die blocker of heat to the initial forging temperature of process stipulation, in the straight forging die of heat
Blocking forming, finish-forging forming, trimming (the 1 time/part of trimming number) in edger in the straight forging die finish impression of heat in thorax, i.e.,
It can get the straight semi-finished product forging part of suspension hook for entirely reaching final shape and size not yet and requiring as shown in Figure 3.
The first time, hot straight die-forging forming was realized by the straight forging die of heat, hot straight forging die (a referring to fig. 2
With shown in Fig. 2 b) be by pulling with flatten blocker 1, diagonal form latch 2, blocker 3, blocking flash gutters 4, finish impression
5, totally six chief components of finish-forging flash gutters 6.The pulling and flattening 1 longitudinal arrangement of blocker, are located at the straight forging of heat
The left back portion of mould；The diagonal form latches 2 longitudinal arrangements, positioned at the left front portion and right rear portion of the straight forging die of heat；The blocker
3 longitudinal arrangement of thorax, the left back portion in the straight forging die of heat；The blocking flash gutters 4 are located at the surrounding of blocker 3；It is described
5 longitudinal arrangement of finish impression (opposite with 3 orientation of blocker), positioned at the middle right front portion of the straight forging die of heat；The finish-forging
Flash gutters 6 are located at the surrounding of finish impression 5.
Heat is straight, and forging die structure is simple, compact, and deformation force is small, high reliablity, and dimensional uniformity is good, and dimensional accuracy is high, effect
Rate is high, and improving straight 1 times of the Service Life of Forging Die of heat, (hot straight Service Life of Forging Die is by being increased to 0.8 ten thousand less than 0.4 ten thousand/set
Part/set).
The pulling and flatten blocker 1 and pulled out for suspension hook and flatten base forming, be wedge type symmetrical above and below+
The compound pulling structure of flat pattern+wedge type has the continuous dual function for promoting pulling and flattening base, provides shape and ruler for blocking
Very little preparation.
The diagonal form lock 2, for left and right single pair angle-style buckle structure, latches vertical convex-concave for controlling forging die guiding
It is 0.5mm that face unilateral side, which is oriented to fit clearance, and upper and lower male and female face anti-interference fit clearance is 1.0mm, both can control the cross of forging part
It is required to longitudinal offsetting amount, forging die length-width direction size can also be effectively reduced.
The blocker 3 is for the straight die-forging forming of suspension hook semi-finished product blocking heat, shape and size and suspension hook half
The shape of finished product blocking hot mould-forging piece figure is corresponding with size (referring to shown in Fig. 3 a and Fig. 3 b), and 3 depth of blocker is greater than eventually
5 depth 1.5mm~2.0mm of forging die thorax, can provide good shape for finish-forging and size prepares.
The blocking flash gutters 4 are taper structure symmetrical above and below, surround 3 horizontal direction surrounding of blocker, wherein
Wedge type angle is 15 °, and inlet thickness H is (6+6) mm=12mm, and entrance circular angle radius r is 8mm, width 20mm, to be conducive to
Accommodate the excess metal that blocker 3 squeezes out, it is often more important that the forming of blocking metal flow can be conducive to, reduce blocking deformation
Power improves forging efficiency, improves finish-forging dimensional accuracy.
The finish impression 5 is all embodied for the straight die-forging forming of suspension hook semi-finished product finish-forging heat, shape and size
On finish-forging heat forging drawing (referring to fig. 4 shown in a and Fig. 4 b), lower Molded Depth corresponding to finish impression upper mold depth and finish impression
It spends identical；The structure of finish-forging hot mould-forging piece complements each other with size and corresponding blocking hot mould-forging piece structure with size design,
Finish-forging deformation force is small, and finish-forging is high-efficient, and the dimensional uniformity for forging part especially short transverse that heat is straight is good and dimensional accuracy is high.
The finish-forging flash gutters 6 are the whole double storehouse type structures in single storehouse type+part, accommodate finish impression 5 to be more advantageous to
Extra heterogeneity metal is squeezed out, is easy to the forming of finish-forging metal flow, reduces finish-forging deformation force, improves forging efficiency.
The straight forging die work step of heat of the invention is as follows: S1: installation fixing step: the straight forging die setting of heat being fixed on
In existing 20kN die hammer equipment, the straight forging die of heat is then preheating to 150 DEG C~350 DEG C；S2: it base step: will heat
Be heated to for the first time in furnace the later round steel blank of initial forging temperature be placed in pulling and flatten blocker 1 on pulled out and flattened
Base；S3: blocking step: pulling is longitudinally disposed in blocker 3 with the blank after flattening base carries out blocking again；S4: eventually
Forging step: the u-turn of blocking hot forging is rotated to the right 180 ° again and is longitudinally disposed at finish-forging forming in finish impression 5；S5: trimming process:
Band overlap suspension hook semi-finished product forging part is placed in trimming in edger (1 time/part of trimming number) after finally finish-forging is shaped, and can obtain
It obtains and entirely reaches the straight forging part of suspension hook semi-finished product heat that final shape and size require not yet.
(2) second of thermal flexure die-forging forming: it needs to realize by 1 set of thermal flexure forging die, i.e., by first time hot forging
The semi-finished product forging part of forming be heated to initial forging temperature, then the straight semi-finished product forging part vertical equity of suspension hook heat is placed in again it is pre-
Prebuckling is carried out in edger, finally carries out whole bending in prebuckling finish impression, can thoroughly reach as shown in Figure 1
Suspension hook forging part shape and size requirement.
Second of thermal flexure die-forging forming realized by thermal flexure forging die (referring to Fig. 5 a, Fig. 5 b, Fig. 5 c,
Shown in Fig. 5 d and Fig. 5 e), second of thermal flexure die-forging forming is realized by thermal flexure forging die, and thermal flexure forging die is
The compound lock 16 in double angles totally 3 chief components are indulged by prebuckling impression, whole edger and list.The prebuckling impression
Positioned at the right rear portion of thermal flexure forging die；Whole edger is located at the left back portion of thermal flexure forging die；The compound lock 16 in single vertical double angles
Positioned at the positive front of thermal flexure forging die.
Thermal flexure forging die, structure is simple, and deformation force is small, high reliablity, and dimensional uniformity is good, and dimensional accuracy is high, high-efficient,
Service life height (thermal flexure Service Life of Forging Die at least 70,000/set).
The prebuckling impression is mainly by pre- straight located cavity 7, prebuckling positioning convex platform 8, prebuckling cavity plate 9, pre-
The fit structure that bending punch 10 and the fixed high cavity 11 of prebuckling form, it is pre- for the straight semi-finished product prebuckling forming of suspension hook
Curved shape and size and corresponding prebuckling hot mould-forging piece diagram shape and size are corresponding (shown in Figure 7)；Increase pre-
Edger carries out prebuckling, is prepared with providing strong shape early period for final thermal flexure precision form with size.
The pre- straight located cavity 7 is for the straight forging part of suspension hook semi-finished product heat before and after being placed in front of lower die bending
The top rake of both ends positioning, the front end depth of located cavity and the setting of rear end depth baseplane is 2 °~3 ° (so that heat is flat
The baseplane of straight semi-finished product forging part forms certain oblique force that turns forward, and advantageously ensures that V corresponding during bending
Type recess fillet and prebuckling positioning convex platform 8 continuously contact with and improve the reliability and efficiency of positioning), the draft at the semicircle of rear end
Gradient and radius of corner pattern draft corresponding with the straight forging shank semicircle place of heat match with radius of corner, are final curved
Song provides strong shape early period in place and prepares with size.
The prebuckling positioning convex platform 8 is used for the positioning during the straight forging part prebuckling of suspension hook semi-finished product heat, after
Holding fillet pattern draft is 3 °, V-type recess fillet corresponding to rear end radius of corner size and hot flat shape semi-finished product forging part
Radius size matches, and left and right side provides strong shape early period without pattern draft, for final curved shape and size in place
Prepare with size.
The prebuckling cavity plate 9 takes out prebuckling hot mould-forging piece, pre-curved shaped for prebuckling forming, receiving and clamping
Shape corresponding to shape and size and prebuckling hot mould-forging piece figure is identical as size, but more curved than corresponding whole bending hot-die part figure
Bent angle is 15 ° big, and prebuckling cycle is 2 hammers/part, with for providing in place for final curved shape and size it is strong
Early period, shape prepared with size.
The prebuckling punch-pin 10 shapes for prebuckling hot mould-forging piece upper bend and transmits bending deformation power, pre-bending
Curved shape and size and corresponding prebuckling hot mould-forging piece diagram shape are identical as size, but bending angle is more curved than corresponding end
Bent hot-die part figure bending angle is 15 ° big, with to be finally bent into, shape provides strong shape early period and size prepares.
Fixed high and auxiliary positioning of the high cavity 11 for prebuckling forming is determined in the prebuckling, working depth size and pre-
Corresponding prebuckling hot forging height dimension is identical after bending.
The whole edger is mainly by whole positioning convex platform 12, whole bending die 13, whole bending punch 14 and bending eventually
The fit structure that fixed high cavity 15 forms therefore, should also be further added by end because prebuckling process cannot reach " step is bent in place "
Bending operation is to reach " being thoroughly bent in place ", whole curved shape and size and corresponding whole bending hot mould-forging piece diagram shape
It is corresponding with size (shown in Figure 6).
The whole positioning convex platform 12 for the pre- thermal flexure hot mould-forging piece of suspension hook be placed in lower die eventually it is curved all around
Positioning, whole positioning convex platform rear end fillet pattern draft are 3 °, rear end radius of corner size and hot flat shape semi-finished product forging part institute
Corresponding V-type recess radius of corner size matches, and left and right side is without pattern draft, before being provided with power in place for final bending
Phase shape and size prepare.
The whole bending die 13 is used for whole bending forming, receiving and clamping and takes out bending hot mould-forging piece eventually, shape with
Shape corresponding to size and eventually bending hot mould-forging piece figure is identical as size, but bending angle is than corresponding whole bending hot-die part
Figure bending angle is 1 ° small, and curved bottom depth is 1.0mm bigger than corresponding whole bending hot-die part figure curved bottom depth, is bent eventually
Cycle is 2 hammers/part, is difficult to realize " thoroughly with solving to spring back after bending hot-die part is cooling eventually by reversible deformation method
Bending in place " problem.
The whole bending punch 14 for being bent the deformation of hot mould-forging piece upper bend and transmitting bending deformation power, bending eventually
Radius of corner is identical as corresponding whole bending hot-die part figure curved radius radius, and bending angle is than corresponding whole bending hot-die
Part figure bending angle is 1 ° small, with solve to spring back after bending hot-die part is cooling eventually by reversible deformation method be difficult to realize it is " thoroughly curved
It is bent in place " problem.
The single side face fit clearance of 13 vertical direction of whole bending punch 14 and whole bending die is 3.0mm, to prevent
Only whole bending punch 14 generates interference phenomenon with whole bending die 13 after closure.
Whole fixed high and auxiliary positioning, working depth size and the end for being bent fixed high cavity 15 and being used for whole bending forming
The height dimension of corresponding whole bending hot forging is identical after bending.
The vertical double compound locks 16 in angle of the list are used for the compound direction of thermal flexure forging die, and it is unilateral to latch vertical male and female face
Guiding fit clearance is 0.5mm, and upper and lower male and female face anti-interference fit clearance is 1.0mm, can both prevent final thermal flexure part from offsetting
It measures overproof and improves forging part shape and dimensional accuracy (especially geometric tolerance precision), can also be conducive to reduce forging die length and width
Direction size.
The work step of thermal flexure forging die of the invention is as follows: S1: installation fixing step: thermal flexure forging die setting being fixed
In existing 20kN die hammer equipment, thermal flexure forging die is then preheating to 150 DEG C~350 DEG C；S2: prebuckling positioning step:
The straight forging part of suspension hook semi-finished product heat is heated to after initial forging temperature in prebuckling impression, pre- straight fixed in heating furnace
Prebuckling prelocalization is carried out in the cavity 7 of position, carries out positioning in bending process in bending positioning convex platform 8；S3: pre-bending step:
By suspension hook semi-finished product forging part under the fixed high effect downwards of cavity 11 of prebuckling punch-pin 10 and prebuckling, in prebuckling cavity plate 9
Prebuckling forming is carried out, until thermal flexure forging die closure (prebuckling cycle is 2 hammers/part), to obtain prebuckling part (ginseng
As shown in Fig. 1 and Fig. 7)；S4: it is bent positioning step eventually: prebuckling rear hanger semi-finished product forging part is placed in whole edger again
In, it carries out positioning before being bent eventually with whole bending process in whole positioning convex platform 12；S5: whole bending step: in whole bending punch
Under 14 act on downwards with the fixed high cavity 15 of bending eventually, prebuckling part is carried out to whole bending forming in whole bending die 13, until
Thermal flexure forging die closure (bending cycle is 2 hammers/part eventually)；S6: take out step: finally will eventually suspension hook after bending at
Product forging part with clamp, laterally take out by clamping, can thoroughly obtain good the hanging as shown in figures 1 to 6 of shape and dimensional uniformity
Hook micron order forging part.
The present invention has technical feasibility, reliability, economic rationality, makes it can be seen from above-mentioned technical proposal
With safety, efficiently solve in existing " base, 20kN die forging hammer die forging and 3150kN trimming pressure on 10kN flat-die hammer
Be bent on power machine " joint die forging forming process method poor reliability, dimensional accuracy it is low, accepted product percentage is low, deformation force is big, forging
Make the problems such as low efficiency, Service Life of Forging Die be low.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of this field
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improve and become
Shape also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of forging die for combining die-forging forming, it is characterised in that: hot straight forging die and thermal flexure forging die, heat is straight, and forging die is used for
Suspension hook combines the straight die-forging forming of heat of precision die forging forming technology, and thermal flexure forging die shapes work for suspension hook joint precision die forging
The thermal flexure die-forging forming of skill；Heat is straight, and forging die includes that pulling and flattening blocker (1), diagonal form latch (2), blocker
(3), blocking flash gutters (4), finish impression (5), finish-forging flash gutters (6), heat is straight, and die-forging forming includes: by round steel blank heating
Base on blocker is pulled out and flattened, in the straight forging die blocker of heat to the initial forging temperature of process stipulation, in the straight forging die of heat
Blocking forming, finish-forging forming, the trimming in edger in the straight forging die finish impression of heat, obtain semi-finished product forging part in thorax；
Thermal flexure forging die includes prebuckling impression, the compound lock of whole edger and single vertical double angles, thermal flexure die-forging forming include: by
Semi-finished product forging part is heated to initial forging temperature, the straight semi-finished product forging part vertical equity of suspension hook heat is then placed in prebuckling mould again
Prebuckling is carried out in thorax, finally carries out whole bending in thermal flexure forging die finish impression, obtains finished product forging part.
2. the forging die of joint die-forging forming according to claim 1, which is characterized in that the pulling and flattening blocker
(1) longitudinal arrangement, positioned at the left back portion of the straight forging die of heat；The diagonal form latches (2) longitudinal arrangement, positioned at the straight forging die of heat
Left front portion and right rear portion；Blocker (3) longitudinal arrangement, the left back portion in the straight forging die of heat；The blocking overlap
Slot (4) is located at the surrounding of blocker (3)；Finish impression (5) longitudinal arrangement, positioned at the middle right front portion of the straight forging die of heat,
It is opposite with blocker (3) orientation；The finish-forging flash gutters (6) are located at the surrounding of finish impression (5).
3. the forging die of joint die-forging forming according to claim 2, which is characterized in that the pulling and flattening blocker
(1) it pulls out for suspension hook and flattens base forming, be the compound pulling structure of wedge type+flat pattern+wedge type symmetrical above and below, have continuous
It promotes pulling and flattens the dual function of base, provide shape for blocking and size prepares.
4. the forging die of joint die-forging forming according to claim 3, which is characterized in that the diagonal form lock (2) is used
In control forging die guiding, for left and right single pair angle-style buckle structure, latching vertical male and female face unilateral side guiding fit clearance is 0.5mm,
Upper and lower male and female face anti-interference fit clearance is 1.0mm.
5. the forging die of joint die-forging forming according to claim 4, which is characterized in that the blocker (3) is used for
The straight die-forging forming of suspension hook semi-finished product blocking heat, the shape and size of shape and size and suspension hook semi-finished product blocking hot mould-forging piece
Corresponding, blocker (3) depth is greater than finish impression (5) depth 1.5mm~2.0mm.
6. the forging die of joint die-forging forming according to claim 5, which is characterized in that the blocking flash gutters (4) are
Taper structure symmetrical above and below surrounds blocker (3) horizontal direction surrounding, and wherein wedge type angle is 15 °, and inlet thickness H is
12mm, entrance circular angle radius r are 8mm, width 20mm, to accommodate the excess metal of blocker (3) extrusion.
7. the forging die of joint die-forging forming according to claim 6, which is characterized in that the prebuckling impression is located at hot bending
The right rear portion of bent forging die；Whole edger is located at the left back portion of thermal flexure forging die；Single vertical double compound locks in angle (16) are located at heat
It is bent the positive front of forging die.
8. the forging die of joint die-forging forming according to claim 7, which is characterized in that the prebuckling impression includes pre- flat
High cavity is determined in straight located cavity (7), prebuckling positioning convex platform (8), prebuckling cavity plate (9), prebuckling punch-pin (10) and prebuckling
(11)；Rear and front end portion of the pre- straight located cavity (7) for the straight forging part of suspension hook semi-finished product heat before being placed in lower die bending
The top rake of positioning, front end depth and the setting of rear end depth baseplane is 2 °~3 °, the pattern draft at the semicircle of rear end with
Radius of corner matches with pattern draft at the corresponding straight forging shank semicircle of heat with radius of corner；Prebuckling positioning convex platform
(8) for the positioning during the straight forging part prebuckling of suspension hook semi-finished product heat, rear end fillet pattern draft is 3 °, rear end fillet
Radius size matches with corresponding hot flat shape semi-finished product forging part V-type recess radius of corner size, and left and right side is without draft
Gradient；Prebuckling cavity plate (9) takes out prebuckling hot mould-forging piece, pre-bend shape and ruler for prebuckling forming, receiving and clamping
Very little and corresponding prebuckling hot mould-forging piece diagram shape is identical as size；Prebuckling punch-pin (10) is used for prebuckling hot mould-forging piece
Portion's bending forming and transmitting bending deformation power, pre-bend shape and size and corresponding prebuckling hot mould-forging piece diagram shape and ruler
It is very little identical；Fixed high and auxiliary positioning of the high cavity (11) for prebuckling forming is determined in the prebuckling, working depth size with
The height dimension of corresponding prebuckling hot forging is identical after prebuckling.
9. the forging die of joint die-forging forming according to claim 8, which is characterized in that the whole edger includes eventually
Positioning convex platform (12), whole bending die (13), whole bending punch (14) and whole be bent determine high cavity (15)；Whole positioning convex platform (12)
For the pre- thermal flexure hot mould-forging piece of suspension hook, lower die is curved eventually all around to be positioned being placed in, and rear end fillet pattern draft is 3 °,
Rear end radius of corner size and the V-type recess radius of corner size of hot flat shape semi-finished product forging part match, and left and right side is without pulling out
Mould gradient；Whole bending die (13) be used for whole bending forming, receiving and clamping take out bending hot mould-forging piece eventually, shape and size with
Corresponding whole bending hot mould-forging piece diagram shape is identical as size, but bending angle is bent than corresponding whole bending hot-die part figure
Angle is 1 ° small, and curved bottom depth is 1.0mm bigger than corresponding whole bending hot-die part figure curved bottom depth；Whole bending punch
(14) for being bent the deformation of hot mould-forging piece upper bend and transmitting bending deformation power eventually, curved radius radius and corresponding end are curved
Bent hot-die part figure curved radius radius is identical, and bending angle and corresponding whole bending hot-die part figure bending angle are 1 ° small；It is curved eventually
The single side face fit clearance of bent punch-pin (14) and whole bending die (13) vertical direction is 3.0mm；It is bent fixed high cavity (15) eventually
For the fixed high and auxiliary positioning of whole bending forming, the height of corresponding whole bending hot forging after working depth size and eventually bending
It is identical to spend size.
10. the forging die of joint die-forging forming according to claim 9, which is characterized in that the compound lock in the vertical double angles of the list
The compound direction that (16) are used for thermal flexure forging die is detained, latching vertical male and female face unilateral side guiding fit clearance is 0.5mm, upper and lower convex-concave
Face anti-interference fit clearance is 1.0mm.
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| CN201710978294.9A CN107855453B (en) | 2017-10-18 | 2017-10-18 | A kind of forging die for combining die-forging forming |
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| CN201710978294.9A CN107855453B (en) | 2017-10-18 | 2017-10-18 | A kind of forging die for combining die-forging forming |
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| CN107855453B true CN107855453B (en) | 2019-06-18 |
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| CN112122522A (en) * | 2020-09-19 | 2020-12-25 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Forming process and bending forming device for hinge part |
| CN114700455A (en) * | 2022-04-20 | 2022-07-05 | 无锡派克新材料科技股份有限公司 | Die forging die for fork joint forge piece and die forging method thereof |
| CN115533011B (en) * | 2022-11-07 | 2023-03-24 | 天津航天长征技术装备有限公司 | Forming die, pre-forging blank, die forging and production process of 05Cr17Ni4Cu4Nb die forging |
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| CN103042145B (en) * | 2012-12-25 | 2016-04-13 | 国营第六一六厂 | Spanner precision die forging forming technology |
| CN203076507U (en) * | 2012-12-26 | 2013-07-24 | 四川联茂机械制造有限公司 | Universal joint one-mould three-station mould |
| CN203541414U (en) * | 2013-11-29 | 2014-04-16 | 马鞍山市长冶重工科技有限公司 | Durable caterpillar chain plate forging combined die |
| CN104057008B (en) * | 2014-07-10 | 2017-04-12 | 山东远大特材科技股份有限公司 | Four-station forging die for pull rod of railway turnout opening |
| CN104972038A (en) * | 2015-07-28 | 2015-10-14 | 刘达 | Forging forming technology of lifting hook |
| CN105127344A (en) * | 2015-08-24 | 2015-12-09 | 浙江跃进锻造有限公司 | Spherical trailer hook forming technology |
| CN106180519B (en) * | 2016-07-20 | 2018-02-06 | 中车戚墅堰机车车辆工艺研究所有限公司 | Die-forging forming mould and its manufacturing process |
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