CN103691813B - The special bending machine die of a kind of special R based plate - Google Patents

The special bending machine die of a kind of special R based plate Download PDF

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Publication number
CN103691813B
CN103691813B CN201310673126.0A CN201310673126A CN103691813B CN 103691813 B CN103691813 B CN 103691813B CN 201310673126 A CN201310673126 A CN 201310673126A CN 103691813 B CN103691813 B CN 103691813B
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moving block
mold
plane
special
angle
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CN201310673126.0A
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CN103691813A (en
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张迎年
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安徽力源数控刃模具制造有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/20Making tools by operations not covered by a single other subclass

Abstract

The invention discloses the special bending machine die of a kind of special R based plate, belong 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; Utilize energy time processing of the present invention to become workpiece to be processed, precision is high, does not need secondary artificial treatment, does not damage surface of the work, and easy to operate, cost is low.

Description

The special bending machine die of a kind of special R based plate

Technical field

The invention belongs to Design of Dies field, specifically, relate to a kind of bending machine die, more particularly, relate to the special bending machine die of a kind of special R based plate.

Background technology

Bending machine die is that bender is used for the instrument of machine-shaping plate, and this instrument is made up of various part, and the part that different moulds is formed is different.It realizes the processing of article profile mainly through the change of institute's moulding material physical state.Under the effect of bender pressure, by the guiding each other of upper die of bending machine and counterdie, blank is become have the workpiece of given shape and size.In actual production process, enterprise according to the difference of shaping workpiece shape or size, can configure the counterdie of different FLUTE ANGLE.But along with expanding economy, want the shape of the workpiece of bending also more and more diversified, workpiece different so just needs certain moduli tool to process, such as add man-hour at antitheft door, need a special R based plate, its shape as shown in Figure 1, sheet material to be converted at middle part one curved, shape after being converted into is middle part is a semicircular circular arc, circular arc both sides are made up of two planes, be called the first plane and the second plane, angle between first plane and the second plane is 105 °, first plane and circular sliding slopes, the angle of the tangent line on the first plane and circular arc summit is 5 °, angle between the line of i.e. the first plane and circular arc two end points is 85 °, this workpiece is comparatively strict for angle requirement, add that again formed bending opening is little, so difficulty of processing is very large.

In prior art, the Bending Mould of bending circular arc is a lot, such as China Patent No.: 201220311573.2, publication date on January 30th, 2013, disclose the patent document that a name is called sheet metal bending Inner arc mould, this utility model discloses a kind of sheet metal bending Inner arc mould, comprise drift and bed die, this bed die is made up of mold block and base, two mold block are symmetrical fixing two D type structures, the cambered surface of two D mould blocks is inside, form groove between two D mould blocks, described drift lower end is cone structure.Described groove width is 90 ~ 100mm, is preferably 96mm.Drift lower end is cone structure, drift and groove with the use of.This utility model improves traditional V-type Bending Mould, utilizes the mould of this utility model can improve the production efficiency of bending and forming, ensures part requirements Inner arc size, effective.

China Patent No.: 201320105342.0, publication date on August 14th, 2013, disclose the patent document that a name is called a kind of Platform of Excavators arc plate Bending Mould, this utility model relates to a kind of Platform of Excavators arc plate Bending Mould, includes upper bolster, patrix, clamping device, counterdie, die shoe, positioner, circular cushion block.It is characterized in that: the upper surface of patrix is welded on upper bolster, the bottom outline shape of patrix is lower convex surface of revolution, its section configuration with shaping after excavator arc plate curve shape consistent; The lower surface of counterdie is welded on die shoe, and the center upper portion of counterdie is processed with a recessed surface of revolution, its section configuration with shaping after excavator arc plate curve shape consistent; The side, upper surface of counterdie is welded with positioner, and opposite side is provided with clamping device, and the two ends of clamping device form movable connection with counterdie by bolt; Circular cushion block has four pieces, is welded on the upper surface of counterdie.This utility model can disposable bending and molding, for the bending and molding of excavator arc plate in enormous quantities saves a large amount of time, improves precision and the efficiency of excavator arc plate bending and molding.

Above two parts of patent documents can Machining Arc, but special R based plate recited above cannot be processed, because existing Design of Dies theory is all the workpiece will processing what shape just prepare the bending machine die of correspondingly-shaped, processing mode for the special R based plate of stating above is then first roll over a circular arc with common bending machine, and then manually circular arc is shunk, so not only waste time and energy, and due to the internal stress influence of workpiece, elastic deformation can be there is after processing, machining accuracy is inadequate, user demand cannot be met, and easily damage is caused to the surface of workpiece during bending.

The present bender particular manufacturing craft being badly in need of this special R based plate of a kind of energy of design one-shot forming, improves machining accuracy, reduces production cost, and will ensure the service life of this particular manufacturing craft.

Summary of the invention

1. invent the technical problem that will solve

For cannot disposable processing special R based plate and the not high problem of prior art machining accuracy in prior art, there is provided a kind of special R based plate special bending machine die, this special R based plate of energy disposal molding, machining accuracy is high, to workpiece not damaged, and because the parts of a special shape used by this mould, these parts need higher hardness.

2. technical scheme

Object of the present invention is achieved through the following technical solutions.

The special bending machine die of a kind of special R based plate, comprises mold and bed die, wherein:

Described mold is followed successively by mold hold assembly, mold body and mold bottom surface from top to bottom; Described mold bottom surface is made up of five faces, is followed successively by the first inclined-plane, the second inclined-plane, semi-circular arc face, the second inclined-plane and the first inclined-plane from side to opposite side, and the angle on the first described inclined-plane and vertical direction is 70 °; The first described inclined-plane and the angle on the second inclined-plane are 105 °; The line of described two end points in semi-circular arc face and plane-parallel;

Described bed die comprises interior card moving block, briquetting, bolt and bed die body; On described bed die body, middle side part is provided with a downward square groove, and the middle part of the bottom surface of this square groove is provided with a first downward inside groove; The position that the bottom of described bed die body is corresponding with the first inside groove vertical direction is provided with a bolt indentation upwards, part between bolt indentation and the first inside groove has bolt hole, and bolt is connected with briquetting through after the first inside groove through after this bolt hole again; Bolt between the first described inside groove and briquetting also overlaps and has spring; The upper surface of described briquetting is horizontal plane, and downside is provided with two steps;

Described interior card moving block has two, lays respectively at the both sides of briquetting in square groove; The shape of described interior card moving block is for falling " 7 " shape; Described interior card moving block comprises and being connected to form successively by horizontal plane, moving block second medial surface and moving block end face inside moving block first lateral surface, moving block bottom surface, moving block first medial surface, moving block, by arc transition between moving block first lateral surface and moving block bottom surface, the angle between moving block first lateral surface and moving block bottom surface is 85 °; Angle between moving block bottom surface and moving block first medial surface is 135 °; Inside moving block, horizontal plane is parallel with moving block bottom surface; Angle inside moving block second medial surface and moving block between horizontal plane is 70-80 °, and inside moving block, horizontal plane and moving block second medial surface junction are by arc transition, and the radius of this circular arc equals 1/3 of mold semi-circular arc radius surface; Angle between moving block end face and moving block bottom surface is 20 °.

Preferably, the radius of the transition arc between described moving block first lateral surface and moving block bottom surface equals 1/2 of mold semi-circular arc radius surface.

Although the special bending machine die of this special R based plate can well complete part to be processed, but there is a problem, be exactly that access times are many, interior card moving block is because greatly stressed and comparatively frequent, easy damage, especially the interior card moving block of common material and Technology for Heating Processing processing is adopted, just easily occur that rupturing appears in the water caltrop place of moving block second medial surface and moving block end face intersection when use 2000 times, the phenomenons such as wearing and tearing, and the phenomenon that the infall of the infall of moving block first lateral surface and moving block bottom surface and moving block first medial surface and moving block second medial surface occurs crackle or directly ruptures.Can prevent certain crackle from occurring although the radius of this circular arc of the present invention's design equals 1/3 of mold semi-circular arc radius surface, but or rational material composition and Technology for Heating Processing will be relied on, so to be that interior card moving block finds a kind of new material and Technology for Heating Processing.

In in the special bending machine die of special R based plate, a processing method for card moving block, the steps include:

(1) raw material of interior card moving block blank prepare

Interior card moving block blank adopts rough forging to obtain, and the component of this rough forging and mass percent are: C:0.38-0.43%, Mn:0.72-0.77%, Si:0.35-0.45%, S :≤0.020%, P :≤0.025%, Cr:1.78-1.83%, Mo:0.85 ~ 0.95, Sc 2o 3: 0.03-0.05%, surplus are Fe; This composition have employed high Cr and Mo, and the control of addition by Mn and Si, reaches the requirement of high rigidity, adds simultaneously and controls the Sc of certain content 2o 3, add the toughness of material, reduce the hardening crack tendency of material;

(2) annealing in process of rough forging:

Annealed to it by the annealed stove of rough forging obtained in step (1), its annealing temperature is 810-840 DEG C, and annealing time is 3 ~ 5h, is chilled to 540-630 DEG C of laggard line space in the lehr cold;

(3) preliminary working of rough forging, is processed into the primary shape of interior card moving block, and each face retains the surplus of 2mm;

(4) heat treatment of interior card moving block:

Will through the interior card moving block of step (3) Vehicle Processing, 1-2h is incubated after being first heated to 540-620 DEG C, and then be heated to 810-840 DEG C of insulation 20-30min, then be heated to 870-890 DEG C, quench after insulation 0.5-1h, oil quenching, again through subzero treatment after cooling, the temperature of subzero treatment is-195 to-205 DEG C, keeps 1-2h, then at the temperature of 170-190 DEG C, tempering is carried out, tempering three times; Material hardness of the present invention is higher, although by the content of element and Composition Control, improve a part of toughness, reduces embrittlement tendency, in the irrational situation of Technology for Heating Processing or easily hardening crack; So the step heated strictly will be controlled;

(5) deep processing of interior card moving block:

Will through the heat treated interior card moving block of step (4), further deep processing, the steps include:

A water under high pressure removes surface oxide layer;

B processes rounding off place;

Interior card moving block clamping on lathe, is carried out finish turning by C;

Card moving block in D fine grinding;

(6) detection of interior card moving block, detect size and the number of degrees whether qualified.

Preferably, component and the mass percent of the middle rough forging of described step (1) are: C:0.40%, Mn:0.75%, Si:0.40%, S :≤0.020%, P :≤0.025%, Cr:1.80%, Mo:0.90, Sc 2o 3: 0.04%, surplus is Fe;

Preferably, in the annealing in process of described step (2) rough forging, annealing temperature is 830 DEG C, and annealing time is 4h, is chilled to 600 DEG C of laggard line spaces in the lehr cold.

Preferably, in in described step (4), the heat treatment of card moving block is incubated 1.5h after being first heated to 600 DEG C, and then be heated to 830 DEG C of insulation 25min, then be heated to 880 DEG C, quench after insulation 40min, oil quenching, again through subzero treatment after cooling, the temperature of subzero treatment is-200 DEG C, keeps 1.5h, then at the temperature of 180 DEG C, tempering is carried out, tempering three times.

Preferably, in described step (4), the hardening media of oil quenching is No. 2 conventional quenching oils.

3. beneficial effect

Compared with prior art, the present invention has following remarkable advantage:

(1) bottom shape of device of the present invention by special mold and the structure of special bed die, time processing can become workpiece to be processed, precision is high, does not need secondary artificial treatment, does not damage surface of the work, and easy to operate, cost is low;

(2) the interior card moving block that in the special bending machine die of the present invention special R based plate, the processing method of card moving block is processed has higher hardness, toughness and wearability, and in after processing use 10,000 times, card moving block still normally uses, and the life-span is high;

(3) structure of the present invention is simple, and easy to operate, processing cost is low, long service life, simultaneously due to when processing work to workpiece not damaged, so the life-span of the workpiece processed is also long.

Accompanying drawing explanation

Fig. 1 is the structural representation of the workpiece to be processed of device of the present invention;

Fig. 2 is the structural representation of apparatus of the present invention mold;

Fig. 3 is the structural representation of apparatus of the present invention bed die;

Fig. 4 is the structural representation of card moving block in the present invention;

Fig. 5 is the structural representation of the duty of device in the present invention.

In figure: 1, mold hold assembly; 2, mold body; 3, mold bottom surface; 31, the first inclined-plane; 32, the second inclined-plane; 4, interior card moving block; 41, moving block first lateral surface; 42, moving block bottom surface; 43, moving block first medial surface; 44, moving block second medial surface; 45, moving block end face; 5, briquetting; 6, the first inside groove; 7, bolt; 8, bolt indentation; 9, bed die body.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention is described further.

Embodiment 1

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the special bending machine die of a kind of special R based plate, comprises mold and bed die, wherein:

Mold is followed successively by mold hold assembly 1, mold body 2 and mold bottom surface 3 from top to bottom; Mold bottom surface 3 is made up of five faces, and from side to opposite side, be followed successively by the first inclined-plane 32, inclined-plane 31, second, semi-circular arc face, the second inclined-plane 32 and the first inclined-plane, inclined-plane 31, first 31 is 70 ° with the angle on vertical direction; The angle on the first inclined-plane 31 and the second inclined-plane 32 is 105 °; The line of two end points in semi-circular arc face and plane-parallel; As shown in Figure 2.

Bed die comprises interior card moving block 4, briquetting 5, bolt 7 and bed die body 9, and structure as shown in Figure 3; On bed die body 9, middle side part is provided with a downward square groove, and the middle part of the bottom surface of this square groove is provided with a first downward inside groove 6; The position that the bottom of bed die body 9 is corresponding with the first inside groove 6 vertical direction is provided with a bolt indentation 8 upwards, part between bolt indentation 8 and the first inside groove 6 has bolt hole, and bolt 7 is connected with briquetting 5 through after the first inside groove 6 through after this bolt hole again; Bolt between first inside groove 6 and briquetting 5 also overlaps and has spring; The upper surface of briquetting 5 is horizontal plane, and downside is provided with two steps;

Interior card moving block 4 has two, lays respectively at the both sides of briquetting 5 in square groove; The shape of interior card moving block 4 is fall " 7 " shape, as shown in Figure 4; Interior card moving block 4 comprises and being connected to form successively by horizontal plane, moving block second medial surface 44 and moving block end face 45 inside moving block first lateral surface 41, moving block bottom surface 42, moving block first medial surface 43, moving block, by arc transition between moving block first lateral surface 41 and moving block bottom surface 42, the angle between moving block first lateral surface 41 and moving block bottom surface 42 is 85 °; Angle between moving block bottom surface 42 and moving block first medial surface 43 is 135 °; Inside moving block, horizontal plane is parallel with moving block bottom surface 42; Angle inside moving block second medial surface 44 and moving block between horizontal plane is 83 °, and inside moving block, horizontal plane and moving block second medial surface 44 junction are by arc transition, and the radius of this circular arc equals 1/3 of mold semi-circular arc radius surface; Angle between moving block end face 45 and moving block bottom surface 42 is 20 °.The radius of the transition arc between moving block first lateral surface 41 and moving block bottom surface 42 equals 1/2 of mold semi-circular arc radius surface.

The processing method of this device, is first forge, and then is finish-machined to the shape of all parts, finally assemble.Wherein because interior card moving block 4 needs higher hardness, toughness and wearability, need specially treated.

In in the present invention, the processing method of card moving block, the steps include:

(1) raw material of interior card moving block blank prepare

Interior card moving block blank adopts rough forging to obtain, and the component of this rough forging and mass percent are: C:0.40%, Mn:0.75%, Si:0.40%, S :≤0.020%, P :≤0.025%, Cr:1.80%, Mo:0.90, Sc 2o 3: 0.04%, surplus is Fe;

(2) annealing in process of rough forging:

Annealed to it by the annealed stove of rough forging obtained in step (1), its annealing temperature is 830 DEG C, and annealing time is 4h, is chilled to 600 DEG C of laggard line spaces in the lehr cold;

(3) preliminary working of rough forging, is processed into the primary shape of interior card moving block, and each face retains the surplus of 2mm;

(4) heat treatment of interior card moving block:

Will through the interior card moving block of step (3) Vehicle Processing, be incubated 1.5h after being first heated to 600 DEG C, and then be heated to 830 DEG C of insulation 25min, then be heated to 880 DEG C, quench after insulation 40min, oil quenching, hardening media is No. 2 conventional quenching oils, again through subzero treatment after cooling, the temperature of subzero treatment is-200 DEG C, keep 1.5h, then at the temperature of 180 DEG C, carry out tempering, tempering three times;

(5) deep processing of interior card moving block:

Will through the heat treated interior card moving block of step (4), further deep processing, the steps include:

A water under high pressure removes surface oxide layer;

B processes rounding off place;

Interior card moving block clamping on lathe, is carried out finish turning by C;

Card moving block in D fine grinding;

(6) detection of interior card moving block, detect size and the number of degrees whether qualified.The hardness of the interior card moving block obtained is HRC59, through magnetic powder inspection flawless.

The using method of apparatus of the present invention is: top sheet material being placed on bed die, be pressed between interior card moving block 4 by mold bottom surface 3, mold continues to move downward, etc. when being pressed onto briquetting 5 place in square groove, briquetting 5 declines, briquetting 5 press against the intersection angle position of horizontal plane inside moving block first medial surface 43 and moving block, in driving, the upper end of card moving block 4 all inwardly rotates, until the shape required by extruding, leave standstill 10min, can rise mold, as shown in Figure 1, briquetting 5 resets the workpiece of processing under the action of the spring; Simultaneously, card moving block 4 also can easily reset.The workpiece accuracy processed is high, does not damage surface of the work, and in after processing use 10,000 2 thousand times, card moving block still normally uses, and the life-span is high.

Embodiment 2

With embodiment 1, difference is the angle in processed device inside moving block second medial surface 44 and moving block between horizontal plane is 70 °.In the processing method of interior card moving block, component and the mass percent of the middle rough forging of step (1) are: C:0.38%, Mn:0.77%, Si:0.35%, S :≤0.020%, P :≤0.025%, Cr:1.78%, Mo:0.85%, Sc 2o 3: 0.05%, surplus is Fe; In step (2), its annealing temperature is 810 DEG C, and annealing time is 5h, is chilled to 540 DEG C of laggard line spaces in the lehr cold; Be incubated 1h after being first heated to 620 DEG C in step (4), and then be heated to 810 DEG C of insulation 30min, then be heated to 870 DEG C, quench after insulation 1h, the temperature of subzero treatment is-195 DEG C, keeps 2h, then at the temperature of 190 DEG C, carries out tempering.The hardness of the interior card moving block obtained is HRC58, through magnetic powder inspection flawless.In after processing use 10,000 1 thousand times, card moving block still normally uses.

Embodiment 3

With embodiment 1, difference is the angle in processed device inside moving block second medial surface 44 and moving block between horizontal plane is 80 °.In the processing method of interior card moving block, component and the mass percent of the middle rough forging of step (1) are: C:0.43%, Mn:0.72%, Si:0.45%, S :≤0.020%, P :≤0.025%, Cr:1.83%, Mo:0.95%, Sc 2o 3: 0.03%, surplus is Fe; In step (2), its annealing temperature is 840 DEG C, and annealing time is 3h, is chilled to 630 DEG C of laggard line spaces in the lehr cold; Be incubated 2h after being first heated to 540 DEG C in step (4), and then be heated to 840 DEG C of insulation 20min, then be heated to 890 DEG C, quench after insulation 0.5h, the temperature of subzero treatment is-205 DEG C, keeps 1h, then at the temperature of 170 DEG C, carries out tempering.The hardness of the interior card moving block obtained is HRC58, through magnetic powder inspection flawless.In after processing use 10,000 1 thousand times, card moving block still normally uses.

Claims (2)

1. the special bending machine die of special R based plate, comprises mold and bed die, it is characterized in that:
Described mold is followed successively by mold hold assembly (1), mold body (2) and mold bottom surface (3) from top to bottom; Described mold bottom surface (3) is made up of five faces, from side to opposite side, be followed successively by the first inclined-plane (31), the second inclined-plane (32), semi-circular arc face, the second inclined-plane (32) and the first inclined-plane (31), described the first inclined-plane (31) is 70 ° with the angle on vertical direction; Described the first inclined-plane (31) and the angle of the second inclined-plane (32) are 105 °; The line of described two end points in semi-circular arc face and plane-parallel;
Described bed die comprises interior card moving block (4), briquetting (5), bolt (7) and bed die body (9); The upper middle side part of described bed die body (9) is provided with a downward square groove, and the middle part of the bottom surface of this square groove is provided with downward first inside groove (6); The position that the bottom of described bed die body (9) is corresponding with the first inside groove (6) vertical direction is provided with a bolt indentation (8) upwards, part between bolt indentation (8) and the first inside groove (6) has bolt hole, and bolt (7) is connected with briquetting (5) through the first inside groove (6) more afterwards through after this bolt hole; Bolt between described the first inside groove (6) and briquetting (5) also overlaps and has spring; The upper surface of described briquetting (5) is horizontal plane, and downside is provided with two steps;
Described interior card moving block (4) has two, lays respectively at the both sides of briquetting in square groove (5); The shape of described interior card moving block (4) is for falling " 7 " shape; Described interior card moving block (4) comprises and being connected to form successively by horizontal plane, moving block second medial surface (44) and moving block end face (45) inside moving block first lateral surface (41), moving block bottom surface (42), moving block first medial surface (43), moving block, by arc transition between moving block first lateral surface (41) and moving block bottom surface (42), the angle between moving block first lateral surface (41) and moving block bottom surface (42) is 85 °; Angle between moving block bottom surface (42) and moving block first medial surface (43) is 135 °; Inside moving block, horizontal plane is parallel with moving block bottom surface (42); Angle inside moving block second medial surface (44) and moving block between horizontal plane is 70-80 °, inside moving block, horizontal plane and moving block second medial surface (44) junction are by arc transition, and the radius of this circular arc equals 1/3 of mold semi-circular arc radius surface; Angle between moving block end face (45) and moving block bottom surface (42) is 20 °.
2. the special bending machine die of one according to claim 1 special R based plate, it is characterized in that, the radius of the transition arc between described moving block first lateral surface (41) and moving block bottom surface (42) equals 1/2 of mold semi-circular arc radius surface.
CN201310673126.0A 2013-12-12 2013-12-12 The special bending machine die of a kind of special R based plate CN103691813B (en)

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