CN104475582A - Bending lower die for bending machine and manufacturing method for bending lower die - Google Patents
Bending lower die for bending machine and manufacturing method for bending lower die Download PDFInfo
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- CN104475582A CN104475582A CN201410789099.8A CN201410789099A CN104475582A CN 104475582 A CN104475582 A CN 104475582A CN 201410789099 A CN201410789099 A CN 201410789099A CN 104475582 A CN104475582 A CN 104475582A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/20—Making tools by operations not covered by a single other subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
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Abstract
The invention discloses a bending lower die for a bending machine and a manufacturing method for the bending lower die and belongs to the field of bending machines. The invention solves the problems that the precision is low when a large-depth U-shaped workpiece with a planar bottom surface is machined and the workpiece after machining is difficultly disassembled and taken and is easy to damage in the prior art. The bending lower die comprises a lower die base, a die bottom convex piece and an unloading spring; the lower die base is sequentially provided with a first cavity, a second cavity and a spring cavity from top to bottom; the spring cavity is formed on the bottom surface of the second cavity; the cross section of the die bottom convex piece is an inverted T shape; the die bottom convex piece is arranged in the second cavity; one end of the die bottom convex piece extends into the first cavity, and the other end of the die bottom convex piece is connected with the unloading spring; the unloading spring is arranged in the spring cavity. The U-shaped workpiece with the planar bottom surface can be machined at high precision by the bending lower die, and the bending lower die has the advantages of simple structure, reasonable design and easy manufacture.
Description
Technical field
The invention belongs to bender field, specifically, relate to a kind of bender bending lower die tool and manufacture method thereof.
Background technology
Because the application of bender is more and more extensive, more components of machine wish machining by bender, but the working ability of bender limits by mould, only manufacture and design corresponding mould, production and processing could go out workpiece corresponding with it; A processing for dark U-shaped workpiece, as shown in Figure 2, its bottom surface is plane, and due to its bending part large to the distance of minimum point, after will causing bending and molding, the workpiece demoulding is difficult, and hand-stripping is dangerous, and the machine demoulding will cause workpiece deformation, affect workpiece quality.
Through the retrieval to prior art, find the mould that there is the similar U-shaped workpiece of processing, concrete retrieval situation is as follows:
As China Patent No. 201320814197.3, the patent document in publication date on May 7th, 2014, discloses the special bending machine die of a kind of special R based plate, belongs to Design of Dies field.Its device comprises mold and bed die, and described mold is followed successively by mold hold assembly, mold body and mold bottom surface from top to bottom; Described bed die comprises interior card moving block, briquetting, bolt and bed die body; This utility model energy time processing becomes workpiece to be processed, and precision is high, does not need secondary artificial treatment, does not damage surface of the work, and easy to operate, cost is low.This utility model can not process the U-shaped workpiece that bottom surface is plane, and is not suitable for processing dark U-shaped workpiece, Problems existing when failing to solve processing U-shaped workpiece.
And for example China Patent No. 201220103236.4, the patent document in publication date on October 17th, 2012, discloses a kind of U-shaped bending machine die, belongs to bending machine die field.It comprises mold, bed die, also comprises movable block and backing mould, and described bed die upper surface has downward bending groove, and the first groove is arranged at the bottom of bending groove; Described movable block has two, lays respectively on the two side of bending groove; The lower part of described backing mould is inserted in the first groove, and the width of the first half of backing mould is greater than the width of the latter half; Be provided with spring in the first described groove, backing mould can be moved up and down along the first groove.This utility model can be different according to the elasticity of material, regulate the air line distance of two movable block boss, just in time become U-shaped, time saving and energy saving, eliminate the operation of secondary operations when making bending after workpiece resilience; There is structure simple, reasonable in design, be easy to the advantage manufactured, but this utility model can not process the U-shaped workpiece that bottom surface is plane, and be not suitable for the U-shaped workpiece processing the large degree of depth, problem existing when processing dark U-shaped workpiece can not be solved.
Summary of the invention
The problem that 1, will solve
When being the U-shaped workpiece of the large degree of depth of plane for prior art processing bottom surface, precision is lower, unload after machining and get workpiece difficulty, easily workpiece is caused to the problem of damage, the invention provides a kind of bender bending lower die tool and manufacture method thereof, the bed die long service life manufactured by method of the present invention, machining accuracy is high, low cost of manufacture; Bed die of the present invention adopts suitable material for the feature of dark U-shaped workpiece, reasonably designs, ensure that machining accuracy, and makes unloading to get and being more prone to of workpiece.
2, technical scheme
For solving the problem, the present invention adopts following technical scheme.
A kind of bender bending lower die tool, comprise jacking block at the bottom of die shoe, mould and discharging spring, described die shoe is provided with the first cavity, the second cavity and spring cavity from top to bottom successively; The width of the first described cavity equals the width of the U-shaped workpiece of required processing, the large 40mm of the degree of depth of the U-shaped workpiece of the required processing of depth ratio; The width of the second described cavity is 3 times of the first cavity width; Described spring cavity is arranged on the bottom surface of the second cavity; Jacking block at the bottom of described mould is inverted T-shaped, and jacking block at the bottom of mould is arranged in the second cavity, and its one end is stretched in the first cavity, and the other end connects discharging spring; Described discharging spring fitting is in spring cavity; Described die shoe upper surface is provided with overvoltage inclined-plane; Described overvoltage inclined-plane and the angle of horizontal plane are 5 °.
Preferably, at the bottom of described mould, the material of jacking block is 40SiMn2; The first described cavity inner surface is provided with wearing layer.
Preferably, the part surface roughness Ra that jacking block at the bottom of described mould stretches into the first cavity is 0.8; The roughness Ra of the first described cavity inner surface is 0.8.
Preferably, the natural extended length of described discharging spring is more than or equal to the degree of depth of the U-shaped workpiece of required processing.
Preferably, the quantity of described spring cavity is 2-8, and its shape is cuboid or cylinder; The number of described discharging spring is 2-8.
Preferably, the longitudinal section width of described spring cavity is 1/2 of the second cavity width.
A manufacture method for bender bending lower die tool, the steps include:
(A) manufacture of jacking block at the bottom of mould:
1) jacking block raw material at the bottom of mould prepare:
Jacking block at the bottom of mould adopts rough forging to obtain, and the component of this rough forging is by mass percentage: C:0.48-0.49%, Si:0.12%-0.15%, Mn:1.5%-2.5%, Cr:1.50 ~ 2.10%; S≤0.03%, P≤0.03%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt annealing in process, be namely heated to 780-820 DEG C, insulation 2-3 hour, furnace cooling is to 430-490 DEG C, then air cooling;
3) preliminary working of rough forging:
Will through step 2) global shape of jacking block at the bottom of rough forging planer preliminary working Cheng Mo after the pre-heat treatment;
4) heat treatment of jacking block at the bottom of mould:
By through step 3) jacking block at the bottom of mould after preliminary working carries out modifier treatment, and being heated to temperature is 870-880 DEG C, and keeps this temperature 1 hour, then through water hardening, cooling velocity controls at 3.5-4.5 DEG C/s, finally tempering at 340 DEG C;
5) deep processing of jacking block at the bottom of mould:
By through step 4) jacking block at the bottom of mould after Quenching Treatment carries out deep processing, jacking block outer surface at the bottom of half finish-milling mould, and at the bottom of hand-ground mould, jacking block stretches into the part of the first cavity, is 0.8 to surface roughness Ra;
(B) manufacture of die shoe:
1) die shoe raw material prepare:
Adopt rough forging, this blank component is C:0.32%-0.4%, Mn:0.5%-0.8%, Si:0.2%-0.45%, Cr:1.80 ~ 2.20% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.22%-0.34%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt full annealing process, be heated to furnace temperature 870-920 DEG C, cool to 530-580 DEG C with the furnace, then air cooling;
3) preliminary working of rough forging:
Will through step 2) after the pre-heat treatment, rough forging is made the workpiece leaving one side surplus, the step of its preliminary working:
A) planer, becomes the global shape of die shoe by rough forging preliminary working;
B) milling machine, preliminary working spring cavity;
4) heat treatment of die shoe
By through step 3) to be heated to temperature be 850-900 DEG C for die shoe after preliminary working, and keeps this temperature 1-2 hour, then through air-blast quenching, air-cooled speed control built in 2.5-3.5 DEG C/s, tempering after cooling, temperature is 380-400 DEG C;
5) deep processing of die shoe:
By through step 4) die shoe after Quenching Treatment carries out deep processing, and by the first cavity inner surface first rough turn half finish turning again, being finally ground to surface roughness Ra is 0.8;
(C) assemble: first die shoe is fixed in the horizontal plane; Discharging spring is placed in spring cavity, guarantees discharging spring and spring cavity plane perpendicular; Jacking block at the bottom of mould is placed in the second cavity, on discharging spring, jacking block second cavity upper surface contact at the bottom of the effect counterdie of spring force should be ensured.
Preferably, step 1 in described step (A)) the component of rough forging be by mass percentage: C:0.48%, Si:0.14%, Mn:2%, Cr:1.70%; S≤0.03%, P≤0.03%, all the other are Fe.
Preferably, step 1 in described step (B)) blank component be C:0.37%, Mn:0.6%, Si:0.38%, Cr:2.0% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.28%, all the other are Fe.
3, beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) bed die of the present invention comprises jacking block at the bottom of die shoe, mould and discharging spring, and die shoe is provided with the first cavity, the second cavity and spring cavity from top to bottom successively; The width of the first cavity equals the width of the U-shaped workpiece of required processing, the large 40mm of the degree of depth of the U-shaped workpiece of the required processing of depth ratio, and make the contact internal walls of moment and the first cavity in workpiece process, holding workpiece deformation does not occur; The width of the second cavity is 3 times of the first cavity width; Spring cavity is arranged on the bottom surface of the second cavity; Jacking block at the bottom of mould is inverted T-shaped, and jacking block at the bottom of mould is arranged in the second cavity, and its one end is stretched in the first cavity, and the other end connects discharging spring; Discharging spring fitting is in spring cavity; Die shoe upper surface is provided with overvoltage inclined-plane; The angle of overvoltage inclined-plane and horizontal plane is 5 °, and bed die of the present invention makes the U-shaped workpiece angle of bending have degree of precision by overvoltage inclined-plane, automatically can be unloaded by the U-shaped workpiece machined, and do not damage workpiece by discharging spring;
(2) at the bottom of bed die mould of the present invention, the material of jacking block can extend the service life of the bed die of this invention, two kinds of high-abrasive materials contact, and when surface accuracy is higher, coefficient of friction is very little, the machining accuracy of further guarantee product, extends the life-span of workpiece;
(3) jacking block at the bottom of bed die mould of the present invention stretches into the part surface roughness Ra of the first cavity is 0.8, the roughness Ra of the first cavity inner surface is 0.8, two surfaces contacted with each other have higher surface quality, can improve machining accuracy, and extend the mold use life-span;
(4) the natural extended length of bed die discharging spring of the present invention is more than or equal to the degree of depth of the U-shaped workpiece of required processing, can exit the first cavity completely, reach mould and automatically unload the object of getting workpiece after workpiece bending is completed under the effect of discharging spring;
(5) quantity of bed die spring cavity of the present invention is 2-8, and its shape is cuboid or cylinder; The number of discharging spring is 2-8, can select the quantity of suitable discharging spring, guarantee there is enough power when automatically unloading and getting workpiece according to the size of bed die length;
(6) the longitudinal section width of bed die spring cavity of the present invention is 1/2 of the second cavity width, and make lower die structure of the present invention more reasonable, manufacturing cost is lower;
(7) manufacture method process of the present invention is simple, between each parts of produced bed die, quality of fit is high, jacking block at the bottom of mould and the first cavity contact site rub little, slide flexibly, thus improve the precision of this bed die institute processing work on the whole, and to solve bottom surface be unload the problem of getting difficulty after the dark U-shaped work pieces process of plane completes, meet the dark U-shaped work pieces process requirement that bottom surface is plane.
Accompanying drawing explanation
Fig. 1 is the structural representation of bed die of the present invention;
Fig. 2 is the schematic diagram of bed die institute of the present invention processing work;
Fig. 3 is the structural representation of bed die die shoe of the present invention.
In figure: 1, die shoe; 2, jacking block at the bottom of mould; 3, discharging spring; 4, overvoltage inclined-plane; 5, the first cavity; 6, the second cavity; 7, spring cavity.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, the dark 400mm of a kind of processing, the bending lower die tool of wide 100mmU type workpiece, comprises jacking block 2 at the bottom of die shoe 1, mould and discharging spring 3, and die shoe 1 is provided with the first cavity 5, second cavity 6 and spring cavity 7 from top to bottom successively; First cavity 5 inner surface is provided with wearing layer, and the roughness Ra of the first cavity 5 inner surface is the width 100mm of the 0.8, first cavity 5, and the degree of depth is 440mm; The width of the second cavity 6 is 300mm; Spring cavity 7 is arranged on the bottom surface of the second cavity 6, and the quantity of spring cavity 7 is 2, and its shape is cylinder, and the longitudinal section width of spring cavity 7 is 150mm; At the bottom of mould, the material of jacking block 2 is 40SiMn2, at the bottom of mould, jacking block 2 is inverted T-shaped, and jacking block 2 at the bottom of mould is arranged in the second cavity 6, and its one end is stretched in the first cavity 5, the other end connects discharging spring 3, and the part surface roughness Ra that jacking block 2 at the bottom of mould stretches into the first cavity 5 is 0.8; Discharging spring 3 is arranged in spring cavity 7, and the number of discharging spring 3 is 2, and the natural extended length of discharging spring 3 is 500mm; Die shoe 1 upper surface is provided with overvoltage inclined-plane 4; Overvoltage inclined-plane 4 is 5 ° with the angle of horizontal plane.
For obtaining above-described bed die, take the dark 400mm of a kind of processing, the manufacture method of the bending lower die tool of wide 100mmU type workpiece, the steps include:
(A) manufacture of jacking block 2 at the bottom of mould:
1) jacking block 2 raw material at the bottom of mould prepare:
At the bottom of mould, jacking block 2 adopts rough forging to obtain, and the component of this rough forging is by mass percentage: C:0.48%, Si:0.14%, Mn:2%, Cr:1.70%; S≤0.03%, P≤0.03%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt annealing in process, be namely heated to 800 DEG C, be incubated 2.5 hours, furnace cooling to 470 DEG C, then air cooling;
3) preliminary working of rough forging:
Will through step 2) global shape of jacking block 2 at the bottom of rough forging planer preliminary working Cheng Mo after the pre-heat treatment;
4) heat treatment of jacking block 2 at the bottom of mould:
By through step 3) jacking block 2 at the bottom of mould after preliminary working carries out modifier treatment, and being heated to temperature is 875 DEG C, and keeps this temperature 1 hour, then through water hardening, finally tempering at 340 DEG C;
5) deep processing of jacking block 2 at the bottom of mould:
By through step 4) jacking block 2 at the bottom of mould after Quenching Treatment carries out deep processing, jacking block 2 outer surface at the bottom of half finish-milling mould, and jacking block 2 at the bottom of hand-ground mould stretches into the part of the first cavity 5, is 0.8 to surface roughness Ra;
(B) manufacture of die shoe 1:
1) die shoe 1 raw material prepare:
Adopt rough forging, this blank component is C:0.37%, Mn:0.6%, Si:0.38%, Cr:2.0% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.28%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt full annealing process, be heated to furnace temperature 895 DEG C, cool to 555 DEG C with the furnace, then air cooling;
3) preliminary working of rough forging:
Will through step 2) after the pre-heat treatment, rough forging is made the workpiece leaving one side surplus, the step of its preliminary working:
A) planer, becomes the global shape of die shoe 1 by rough forging preliminary working;
B) milling machine, preliminary working spring cavity 7;
4) heat treatment of die shoe 1
By through step 3) to be heated to temperature be 875 DEG C for die shoe 1 after preliminary working, and keeps this temperature 1.5 hours, then through air-blast quenching, air-cooled speed control built in 3.0 DEG C/s, tempering after cooling, temperature is 390 DEG C;
5) deep processing of die shoe 1:
By through step 4) die shoe 1 after Quenching Treatment carries out deep processing, and by the first cavity 5 inner surface first rough turn half finish turning again, being finally ground to surface roughness Ra is 0.8;
(C) assemble: first die shoe 1 is fixed in the horizontal plane; Discharging spring 3 is placed in spring cavity 7, guarantees discharging spring 3 and spring cavity 7 plane perpendicular; Jacking block at the bottom of mould 2 is placed in the second cavity 6, on discharging spring 3, jacking block 2 second cavity 6 upper surface contact at the bottom of the effect counterdie of spring force should be ensured.
In the present embodiment, the specific works process of bed die when bending workpieces is: be fixed on by this bed die on bender lathe base, select the mold matched with it, be arranged on the device for clamping mould of bender lathe slide block, steel plate to be processed be placed on die shoe 1, start bender, mold is quick near workpiece to be processed under the promotion of bender hydraulic jack, when touching workpiece to be processed, slow, and at the uniform velocity work is entered, at the bottom of mould, jacking block 2 moves downward under pressure, discharging spring 3 is under pressure and starts to shrink and store power, until mold to be pressed into completely the first cavity 5, fit completely in mold lower surface and overvoltage inclined-plane 4, work is stopped to enter, return mold at a slow speed, now discharging spring 3 is owing to being no longer subject to downward pressure, obtain the trend moved upward, jacking block 2 at the bottom of mould starts to promote workpiece under spring force and moves upward, until workpiece to be released completely the first cavity 5, workpiece bending completes.High with the workpiece accuracy of bed die bending in this enforcement, surface quality is good, not damaged.Lower die structure in the present embodiment manufactured by method is stablized, and rigidity is strong, and anti-wear performance is good, long service life, and can guarantee that high accuracy is processed, and meets dark 400mm, the accuracy of manufacture requirement of the dark U-shaped workpiece of wide 100mm.
Embodiment 2
As shown in Figure 1, Figure 2 and Figure 3, the dark 300mm of a kind of processing, the bending lower die tool of wide 80mmU type workpiece, comprises jacking block 2 at the bottom of die shoe 1, mould and discharging spring 3, and die shoe 1 is provided with the first cavity 5, second cavity 6 and spring cavity 7 from top to bottom successively; First cavity 5 inner surface is provided with wearing layer, and the roughness Ra of the first cavity 5 inner surface is the width 80mm of the 0.8, first cavity 5, and the degree of depth is 340mm; The width of the second cavity 6 is 240mm; Spring cavity 7 is arranged on the bottom surface of the second cavity 6, and the quantity of spring cavity 7 is 8, and its shape is cylinder, and the longitudinal section width of spring cavity 7 is 120mm; At the bottom of mould, the material of jacking block 2 is 40SiMn2, at the bottom of mould, jacking block 2 is inverted T-shaped, and jacking block 2 at the bottom of mould is arranged in the second cavity 6, and its one end is stretched in the first cavity 5, the other end connects discharging spring 3, and the part surface roughness Ra that jacking block 2 at the bottom of mould stretches into the first cavity 5 is 0.8; Discharging spring 3 is arranged in spring cavity 7, and the number of discharging spring 3 is 8, and the natural extended length of discharging spring 3 is 400mm; Die shoe 1 upper surface is provided with overvoltage inclined-plane 4; Overvoltage inclined-plane 4 is 5 ° with the angle of horizontal plane.
For obtaining above-described bed die, take the dark 300mm of a kind of processing, the manufacture method of the bending lower die tool of wide 80mmU type workpiece, the steps include:
(A) manufacture of jacking block 2 at the bottom of mould:
1) jacking block 2 raw material at the bottom of mould prepare:
At the bottom of mould, jacking block 2 adopts rough forging to obtain, and the component of this rough forging is by mass percentage: C:0.48%, Si:0.12%, Mn:2.5%, Cr:1.50%; S≤0.03%, P≤0.03%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt annealing in process, be namely heated to 780 DEG C, be incubated 2 hours, furnace cooling to 430 DEG C, then air cooling;
3) preliminary working of rough forging:
Will through step 2) global shape of jacking block 2 at the bottom of rough forging planer preliminary working Cheng Mo after the pre-heat treatment;
4) heat treatment of jacking block 2 at the bottom of mould:
By through step 3) jacking block 2 at the bottom of mould after preliminary working carries out modifier treatment, and being heated to temperature is 870 DEG C, and keeps this temperature 1 hour, then through water hardening, cooling velocity controls at 3.5 DEG C/s, finally tempering at 340 DEG C;
5) deep processing of jacking block 2 at the bottom of mould:
By through step 4) jacking block 2 at the bottom of mould after Quenching Treatment carries out deep processing, jacking block 2 outer surface at the bottom of half finish-milling mould, and jacking block 2 at the bottom of hand-ground mould stretches into the part of the first cavity 5, is 0.8 to surface roughness Ra;
(B) manufacture of die shoe 1:
1) die shoe 1 raw material prepare:
Adopt rough forging, this blank component is C:0.32%, Mn:0.8%, Si:0.2%, Cr:2.20% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.22%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt full annealing process, be heated to furnace temperature 870 DEG C, cool to 530 DEG C with the furnace, then air cooling;
3) preliminary working of rough forging:
Will through step 2) after the pre-heat treatment, rough forging is made the workpiece leaving one side surplus, the step of its preliminary working:
A) planer, becomes the global shape of die shoe 1 by rough forging preliminary working;
B) milling machine, preliminary working spring cavity 7;
4) heat treatment of die shoe 1
By through step 3) to be heated to temperature be 850 DEG C for die shoe 1 after preliminary working, and keeps this temperature 1 hour, then through air-blast quenching, air-cooled speed control built in 2.5 DEG C/s, tempering after cooling, temperature is 380 DEG C;
5) deep processing of die shoe 1:
By through step 4) die shoe 1 after Quenching Treatment carries out deep processing, and by the first cavity 5 inner surface first rough turn half finish turning again, being finally ground to surface roughness Ra is 0.8;
(C) assemble: first die shoe 1 is fixed in the horizontal plane; Discharging spring 3 is placed in spring cavity 7, guarantees discharging spring 3 and spring cavity 7 plane perpendicular; Jacking block at the bottom of mould 2 is placed in the second cavity 6, on discharging spring 3, jacking block 2 second cavity 6 upper surface contact at the bottom of the effect counterdie of spring force should be ensured.
Embodiment 3
As shown in Figure 1, Figure 2 and Figure 3, the dark 200mm of a kind of processing, the bending lower die tool of wide 50mmU type workpiece, comprises jacking block 2 at the bottom of die shoe 1, mould and discharging spring 3, and die shoe 1 is provided with the first cavity 5, second cavity 6 and spring cavity 7 from top to bottom successively; First cavity 5 inner surface is provided with wearing layer, and the roughness Ra of the first cavity 5 inner surface is the width 50mm of the 0.8, first cavity 5, and the degree of depth is 240mm; The width of the second cavity 6 is 150mm; Spring cavity 7 is arranged on the bottom surface of the second cavity 6, and the quantity of spring cavity 7 is 6, and its shape is cuboid, and the longitudinal section width of spring cavity 7 is 75mm; At the bottom of mould, the material of jacking block 2 is 40SiMn2, at the bottom of mould, jacking block 2 is inverted T-shaped, and jacking block 2 at the bottom of mould is arranged in the second cavity 6, and its one end is stretched in the first cavity 5, the other end connects discharging spring 3, and the part surface roughness Ra that jacking block 2 at the bottom of mould stretches into the first cavity 5 is 0.8; Discharging spring 3 is arranged in spring cavity 7, and the number of discharging spring 3 is 6, and the natural extended length of discharging spring 3 is 300mm; Die shoe 1 upper surface is provided with overvoltage inclined-plane 4; Overvoltage inclined-plane 4 is 5 ° with the angle of horizontal plane.
For obtaining above-described bed die, take the dark 200mm of a kind of processing, the manufacture method of the bending lower die tool of wide 50mmU type workpiece, the steps include:
(A) manufacture of jacking block 2 at the bottom of mould:
1) jacking block 2 raw material at the bottom of mould prepare:
At the bottom of mould, jacking block 2 adopts rough forging to obtain, and the component of this rough forging is by mass percentage: C:0.49%, Si:0.15%, Mn:1.5%, Cr:2.10%; S≤0.03%, P≤0.03%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt annealing in process, be namely heated to 820 DEG C, be incubated 3 hours, furnace cooling to 490 DEG C, then air cooling;
3) preliminary working of rough forging:
Will through step 2) global shape of jacking block 2 at the bottom of rough forging planer preliminary working Cheng Mo after the pre-heat treatment;
4) heat treatment of jacking block 2 at the bottom of mould:
By through step 3) jacking block 2 at the bottom of mould after preliminary working carries out modifier treatment, and being heated to temperature is 880 DEG C, and keeps this temperature 1 hour, then through water hardening, cooling velocity controls at 4.5 DEG C/s, finally tempering at 340 DEG C;
5) deep processing of jacking block 2 at the bottom of mould:
By through step 4) jacking block 2 at the bottom of mould after Quenching Treatment carries out deep processing, jacking block 2 outer surface at the bottom of half finish-milling mould, and jacking block 2 at the bottom of hand-ground mould stretches into the part of the first cavity 5, is 0.8 to surface roughness Ra;
(B) manufacture of die shoe 1:
1) die shoe 1 raw material prepare:
Adopt rough forging, this blank component is C:0.4%, Mn:0.5%, Si:0.45%, Cr:1.80% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.34%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt full annealing process, be heated to furnace temperature 920 DEG C, cool to 580 DEG C with the furnace, then air cooling;
3) preliminary working of rough forging:
Will through step 2) after the pre-heat treatment, rough forging is made the workpiece leaving one side surplus, the step of its preliminary working:
A) planer, becomes the global shape of die shoe 1 by rough forging preliminary working;
B) milling machine, preliminary working spring cavity 7;
4) heat treatment of die shoe 1
By through step 3) to be heated to temperature be 900 DEG C for die shoe 1 after preliminary working, and keeps this temperature 2 hours, then through air-blast quenching, air-cooled speed control built in 3.5 DEG C/s, tempering after cooling, temperature is 400 DEG C;
5) deep processing of die shoe 1:
By through step 4) die shoe 1 after Quenching Treatment carries out deep processing, and by the first cavity 5 inner surface first rough turn half finish turning again, being finally ground to surface roughness Ra is 0.8;
(C) assemble: first die shoe 1 is fixed in the horizontal plane; Discharging spring 3 is placed in spring cavity 7, guarantees discharging spring 3 and spring cavity 7 plane perpendicular; Jacking block at the bottom of mould 2 is placed in the second cavity 6, on discharging spring 3, jacking block 2 second cavity 6 upper surface contact at the bottom of the effect counterdie of spring force should be ensured.
Jacking block 2 and die shoe 1 at the bottom of the mould that the present invention processes, not only the life-span is high, wearability good, and upper surface is not yielding, after using a period of time, there is not the generation of the wearing and tearing that bed die prepared by common material is such and rough and uneven in surface situation in upper surface, reaches 20,000 service life.
Claims (9)
1. a bender bending lower die tool, comprise die shoe (1), it is characterized in that: also comprise jacking block at the bottom of mould (2) and discharging spring (3), described die shoe (1) is provided with the first cavity (5), the second cavity (6) and spring cavity (7) from top to bottom successively; The width of described the first cavity (5) equals the width of the U-shaped workpiece of required processing, the large 40mm of the degree of depth of the U-shaped workpiece of the required processing of depth ratio; The width of described the second cavity (6) is 3 times of the first cavity (5) width; Described spring cavity (7) is arranged on the bottom surface of the second cavity (6); At the bottom of described mould, jacking block (2) is for inverted T-shaped, and jacking block at the bottom of mould (2) is arranged in the second cavity (6), and its one end is stretched in the first cavity (5), and the other end connects discharging spring (3); Described discharging spring (3) is arranged in spring cavity (7); Described die shoe (1) upper surface is provided with overvoltage inclined-plane (4); Described overvoltage inclined-plane (4) is 5 ° with the angle of horizontal plane.
2. a kind of bender bending lower die tool according to claim 1, is characterized in that: at the bottom of described mould, the material of jacking block (2) is 40SiMn2; Described the first cavity (5) inner surface is provided with wearing layer.
3. a kind of bender bending lower die tool according to claim 1 and 2, is characterized in that: it is 0.8 that jacking block (2) at the bottom of described mould stretches into the part surface roughness Ra of the first cavity (5); The roughness Ra of described the first cavity (5) inner surface is 0.8.
4. a kind of bender bending lower die tool according to claim 1, is characterized in that: the natural extended length of described discharging spring (3) is more than or equal to the degree of depth of the U-shaped workpiece of required processing.
5. a kind of bender bending lower die tool according to claim 1, is characterized in that: the quantity of described spring cavity (7) is 2-8, and its shape is cuboid or cylinder; The number of described discharging spring (3) is 2-8.
6. a kind of bender bending lower die tool according to claim 1 or 5, is characterized in that: the longitudinal section width of described spring cavity (7) is 1/2 of the second cavity (6) width.
7. a bender manufacture method for bending lower die tool, the steps include:
(A) manufacture of jacking block at the bottom of mould (2):
1) jacking block at the bottom of mould (2) raw material prepare:
Jacking block at the bottom of mould (2) adopts rough forging to obtain, and the component of this rough forging is by mass percentage: C:0.48-0.49%, Si:0.12%-0.15%, Mn:1.5%-2.5%, Cr:1.50 ~ 2.10%; S≤0.03%, P≤0.03%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt annealing in process, be namely heated to 780-820 DEG C, insulation 2-3 hour, furnace cooling is to 430-490 DEG C, then air cooling;
3) preliminary working of rough forging:
Will through step 2) global shape of jacking block (2) at the bottom of rough forging planer preliminary working Cheng Mo after the pre-heat treatment;
4) heat treatment of jacking block at the bottom of mould (2):
By through step 3) jacking block (2) at the bottom of mould after preliminary working carries out modifier treatment, and being heated to temperature is 870-880 DEG C, and keeps this temperature 1 hour, then through water hardening, cooling velocity controls at 3.5-4.5 DEG C/s, finally tempering at 340 DEG C;
5) deep processing of jacking block at the bottom of mould (2):
By through step 4) jacking block (2) at the bottom of mould after Quenching Treatment carries out deep processing, jacking block (2) outer surface at the bottom of half finish-milling mould, and jacking block (2) stretches into the part of the first cavity (5) at the bottom of hand-ground mould, be 0.8 to surface roughness Ra;
(B) manufacture of die shoe (1):
1) die shoe (1) raw material prepare:
Adopt rough forging, this blank component is C:0.32%-0.4%, Mn:0.5%-0.8%, Si:0.2%-0.45%, Cr:1.80 ~ 2.20% by mass percentage; S≤0.03%, P≤0.03%, Mo:0.22%-0.34%, all the other are Fe;
2) rough forging the pre-heat treatment:
By step 1) in rough forging adopt full annealing process, be heated to furnace temperature 870-920 DEG C, cool to 530-580 DEG C with the furnace, then air cooling;
3) preliminary working of rough forging:
Will through step 2) after the pre-heat treatment, rough forging is made the workpiece leaving one side surplus, the step of its preliminary working:
A) planer, becomes the global shape of die shoe (1) by rough forging preliminary working;
B) milling machine, preliminary working spring cavity (7);
4) heat treatment of die shoe (1)
By through step 3) to be heated to temperature be 850-900 DEG C for die shoe (1) after preliminary working, and keeps this temperature 1-2 hour, then through air-blast quenching, air-cooled speed control built in 2.5-3.5 DEG C/s, tempering after cooling, temperature is 380-400 DEG C;
5) deep processing of die shoe (1):
By through step 4) die shoe (1) after Quenching Treatment carries out deep processing, and by the first cavity (5) inner surface first rough turn half finish turning again, being finally ground to surface roughness Ra is 0.8;
(C) assemble: first die shoe (1) is fixed in the horizontal plane; Discharging spring (3) is placed in spring cavity (7), guarantees discharging spring (3) and spring cavity (7) plane perpendicular; Jacking block at the bottom of mould (2) is placed in the second cavity (6), on discharging spring (3), jacking block (2) second cavity (6) upper surface contact at the bottom of the effect counterdie of spring force should be ensured.
8. the manufacture method of a kind of bender bending lower die tool according to claim 7, it is characterized in that: step 1 in described step (A)) the component of rough forging be by mass percentage: C:0.48%, Si:0.14%, Mn:2%, Cr:1.70%; S≤0.03%, P≤0.03%, all the other are Fe.
9. the manufacture method of a kind of bender bending lower die tool according to claim 7, it is characterized in that: step 1 in described step (B)) blank component be C:0.37% by mass percentage, Mn:0.6%, Si:0.38%, Cr:2.0%; S≤0.03%, P≤0.03%, Mo:0.28%, all the other are Fe.
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| CN106312485A (en) * | 2016-11-09 | 2017-01-11 | 安徽联盟模具工业股份有限公司 | High-precision long-service-life bending machine lower die manufacturing method |
| CN107030941A (en) * | 2016-12-30 | 2017-08-11 | 无锡进源科技开发有限公司 | Rubber parts easy mold release mould |
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| CN107030941A (en) * | 2016-12-30 | 2017-08-11 | 无锡进源科技开发有限公司 | Rubber parts easy mold release mould |
| CN107030941B (en) * | 2016-12-30 | 2023-05-26 | 无锡进源科技开发有限公司 | Easy demoulding mould for rubber parts |
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| CN104475582B (en) | 2016-04-20 |
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