CN104475505B - A kind of bending and molding method of antitheft door doorframe - Google Patents

A kind of bending and molding method of antitheft door doorframe Download PDF

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Publication number
CN104475505B
CN104475505B CN201410675691.5A CN201410675691A CN104475505B CN 104475505 B CN104475505 B CN 104475505B CN 201410675691 A CN201410675691 A CN 201410675691A CN 104475505 B CN104475505 B CN 104475505B
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counterdie
doorframe
angle
bending
patrix
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CN104475505A (en
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张增明
张德进
谢敏
张荣强
施亚玲
陶小冬
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MAANSHAN CITY HENGLIDA MACHINE BLADE CO Ltd
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MAANSHAN CITY HENGLIDA MACHINE BLADE CO Ltd
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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
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • 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
    • B21D37/10Die sets; Pillar guides

Abstract

The present invention discloses a kind of bending and molding method of antitheft door doorframe, belongs to plate bending and molding technical field. The step of the present invention is: one, control between the first patrix folding the 2nd doorframe section and the 3rd doorframe section in a right angle; Two, the V-type mould point controlling the first patrix coordinates with the first counterdie V-groove mouth on the first counterdie top, rolls between the first doorframe Duan Yu bis-doorframe section in an acute angle; Three, the V-type mould point controlling the first patrix coordinates with the 2nd counterdie V-groove mouth on the first counterdie top, in an obtuse angle between folding the 3rd doorframe Duan Yu tetra-doorframe section; Four, the V-groove mouth controlling the 2nd patrix coordinates with the angle edge of a knife on the 2nd counterdie top, in a right angle between folding the 3rd doorframe Duan Yu tetra-doorframe section, meanwhile, flattens acute angle between the first doorframe Duan Yu bis-doorframe section. 3 traditional molds, 6 procedures are reduced to 2 molds, 4 procedures by the present invention, avoid and frequently change mould in bending and molding process, substantially increase the production efficiency of bending press.

Description

A kind of bending and molding method of antitheft door doorframe
Technical field
The present invention relates to plate bending and molding technical field, more specifically, it relates to a kind of bending and molding method of antitheft door doorframe.
Background technology
Bending machine die is divided into upper die of bending machine and counterdie and die holder, is that the mould of shaping has die cavity for sheet bending and the mould being separated, and the mould of separation has cutting edge. It realizes the processing of workpiece profile mainly through the change of institute's formed material physical condition, makes the plate of various thickness and material become the product having specified shape and size under the effect of bending press pressure. Bending machine die is widely used in the sheet metal bending of the panel beating class industries such as sheet metal, space flight and aviation, automobile making, five metals manufacture, stainless steel plate, household electrical appliances industry.
In prior art, the function of most of bending machine die is more single, can only carry out Bending Processing, when utilizing bending press to carry out flanging work, then needs Bending Mould and the secondary mould of flanging mould two jointly to complete. Referring to the key structure that part A shown in Fig. 2, Fig. 2 is a kind of antitheft door doorframe. Prior art is very loaded down with trivial details to the manufacturing procedure of this key structure, it is generally required to it is carried out at least 6 road manufacturing procedures by 3 molds, referring to (a) in Fig. 6~(f), in Fig. 6, solid line represents state before bending, dotted line represents the state after bending, and loaded down with trivial details bending process will reduce the working (machining) efficiency of antitheft door doorframe greatly. In addition, in the course of processing of this kind of antitheft door doorframe, the requirement on machining accuracy of this key structure is also very high, if this part working accuracy does not reach necessary requirement, then very likely cause whole antitheft door door frame distortions, impact is sold. And how to improve the working accuracy to this key structure and working (machining) efficiency, it is the problem that this kind of antitheft door doorframe manufacturer is devoted to solve always.
China Patent No. ZL200820042303.X, authorized announcement date: on May 6th, 2009, invention and created name is: overlength one two-fold limit mould, the angle of the patrix mould point of this application case is 26 °, and counterdie is monoblock type, on counterdie, the angle of V shape groove groove point is 28 °, in the bottom of counterdie along its length uniform offer each cylindricality guiding blind slot, internal thread hole is all upwards offered at the center of the bottom land of each guiding blind slot, monoblock type lead column base upper plane on uniform along its length guidepost is set, each guidepost correspondence is sliding to be contained in each cylindricality guiding blind slot, coaxial double step through hole offered by guiding column base and guidepost,Upper section large diameter hole on each guidepost arranges compression spring, compression spring is taking neutral spring as the best, each double step through hole installs standing bolt and all correspondence is screwed in internal thread hole, twist standing bolt to adjust compression spring as required and counterdie is adjusted to same height, can without impression bending or the limit flattening overlength, effectively improve bending quality and production efficiency, reduce production cost.
This overlength one two-fold limit mould can when not more mold exchange workpiece is carried out bending and pressing successively, solve the problem of bending press function singleness, improve production efficiency, but its weak point is: there is not anti-deflection mechanism between the counterdie of overlength one two-fold limit mould and guiding column base, when mould operates, easily produce pendulum partially between counterdie and guiding column base, the less stable of whole mould, thus have impact on quality product and die life.
China Patent No. ZL201320311290.2, authorized announcement date: on November 6th, 2013, invention and created name is: the bending press composite die of a kind of anti-bias pendulum, this application case comprises upper die and lower die, lower die holder, resetting mechanism and anti-deflection mechanism, patrix top is provided with mould handle, and the bottom of patrix is provided with V shape mould point; The top of counterdie is provided with V shape groove, and the bottom of counterdie is provided with guide path, and the bottom of guide path is provided with bolt hole; Lower die holder top is provided with guidepost, and guidepost bottom is provided with flanging worktable, and the inside of lower die holder is provided with the staged through hole through flanging worktable and the vertical direction of guidepost; Resetting mechanism comprises bolt and spring, and bolt is through staged through hole and is connected with counterdie by bolt hole, and spring is sleeved on the screw rod of bolt; Anti-deflection mechanism comprises guide pillar and guide pin bushing, and guide pillar is connected mutually with counterdie bottom, and guide pin bushing is connected mutually with lower die holder. This application case improves the production efficiency of bending press, and can effectively prevent the generation of pendulum partially, but the structure design of this application case is not suitable for the machine-shaping of the doorframe key structure of antitheft door shown in Fig. 2, still needs further optimization.
Summary of the invention
1. invent the technical problem to be solved
The key structure that it is an object of the invention to overcome antitheft door doorframe in prior art use conventional Bending Mould to exist working accuracy is low, manufacturing procedure is loaded down with trivial details, need the deficiency of frequent more mold exchange, it provides a kind of bending and molding method of antitheft door doorframe; The present invention only needs to use 2 molds, carries out the bending and molding that 4 road manufacturing procedures can complete antitheft door doorframe key structure, and working (machining) efficiency height and working accuracy height, solve the puzzlement of antitheft door manufacturing enterprise.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
The bending and molding method of a kind of antitheft door doorframe of the present invention, it may also be useful to 2 molds complete the bending technique of antitheft door doorframe, concrete steps are:
Step one, control between the first patrix folding the 2nd doorframe section and the 3rd doorframe section in a right angle;
Step 2, the V-type mould controlling the first patrix point coordinates with the first counterdie V-groove mouth on the first counterdie top, rolls between the first doorframe Duan Yu bis-doorframe section in an acute angle;
Step 3, the V-type mould controlling the first patrix point coordinates with the 2nd counterdie V-groove mouth on the first counterdie top, in an obtuse angle between folding the 3rd doorframe Duan Yu tetra-doorframe section;
The V-groove mouth of step 4, control the 2nd patrix coordinates with the angle edge of a knife on the 2nd counterdie top, rolling between the 3rd doorframe Duan Yu tetra-doorframe section is a right angle, meanwhile, flattens acute angle between the first doorframe Duan Yu bis-doorframe section, spring reset, bending molding process terminates.
Further, in 2 described molds, first mold comprises the first patrix and the first counterdie, and the bottom of the first patrix is provided with V-type mould point, and the top of the first counterdie is provided with the first counterdie V-groove mouth and the 2nd counterdie V-groove mouth that match with above-mentioned V-type mould point;
2nd mold comprises the 2nd patrix, the 2nd counterdie, lower die holder and resetting mechanism, and the top of the 2nd patrix is provided with mould handle, and the bottom of the 2nd patrix is provided with V-groove mouth; The top of the 2nd described counterdie is provided with the angle edge of a knife matched with V-groove mouth, screw hole and spring hole have been offered in interval along its length in the bottom of the 2nd counterdie, corresponding, lower die holder also along its length interval offered erection opening and spring hole, erection opening is staged through hole, and the lower through-hole diameter of this staged through hole is greater than upper through-hole diameter; Described resetting mechanism comprises lifting screw and spring, between the spring hole that spring is arranged at the 2nd counterdie and lower die holder is offered, lifting screw is from the bottom of lower die holder through erection opening and is connected with the 2nd counterdie by screw hole, the nut diameter of this lifting screw is less than the lower through-hole diameter of erection opening, and nut diameter is greater than the upper through-hole diameter of erection opening.
As further improvement of the present invention, the angle at the groove point angle of described V-groove mouth, the edge of a knife point angle of the angle edge of a knife is 90 °.
As further improvement of the present invention, the described angle edge of a knife comprises 3 binder surfaces, and the first binder surface and the 3rd binder surface are parallel to each other, and the angle d of the first binder surface and vertical direction is 47 °.
As further improvement of the present invention, described lower die holder top comprises 2 inclined-planes, and the angle b of the first inclined-plane and horizontal direction is 43 °, and the angle c of the 2nd inclined-plane and vertical direction is 45 °.
3. useful effect
Adopt technical scheme provided by the invention, compared with existing known technology, there is following unusual effect:
(1) a kind of antitheft door doorframe particular manufacturing craft of the present invention, the bottom of its 2nd patrix is provided with V-groove mouth, the top of the 2nd counterdie is provided with the angle edge of a knife matched with V-groove mouth, relative to tradition Bending Mould, notch and the edge of a knife put upside down design, utilize the cooperation between V-groove mouth, the angle edge of a knife and lower die holder inclined-plane, in bending and molding process, the bending of the 3rd doorframe Duan Yu tetra-doorframe section, the flanging operation of the first doorframe Duan Yu bis-doorframe section can synchronously carry out, and substantially increases the bending efficiency of bending press;
(2) a kind of antitheft door doorframe particular manufacturing craft of the present invention, V-groove mouth and the angle edge of a knife are put upside down design by it, and arrange V-groove mouth groove point angle, the angle edge of a knife the edge of a knife point angle angle be 90 °, 2nd patrix presses down in bending process, the angle edge of a knife is utilized to lead, the generation of pendulum partially between the 2nd patrix and the 2nd counterdie can be prevented well, thus improve the working accuracy of antitheft door doorframe, ensure that processing quality;
(3) the bending and molding method of a kind of antitheft door doorframe of the present invention, simple to operate, 3 traditional molds, 6 procedures are reduced to 2 molds, 4 procedures, avoid and bending and molding process is frequently changed mould, substantially increase the production efficiency of bending press.
Accompanying drawing explanation
(a) and (b) in Fig. 1 is the structural representation of 2 cover antitheft door doorframe particular manufacturing crafts in the present invention;
Fig. 2 is the structural representation that antitheft door doorframe needs bending and molding key position;
Fig. 3 is the structural representation of the 2nd cover particular manufacturing craft in the present invention;
Fig. 4 is the structural representation of the 2nd counterdie in the present invention;
Fig. 5 is the structural representation of lower die holder in the present invention;
(a) in Fig. 6~(f) carries out the process picture sheet of antitheft door doorframe key structure bending and molding for utilizing the mould before improving;
(a) in Fig. 7~(d) carries out the process picture sheet of antitheft door doorframe key structure bending and molding for utilizing the mould of the present invention.
Label in schematic diagram illustrates:
11, the first patrix; 111, V-type mould point; 12, the 2nd patrix; 121, V-groove mouth; 122, mould handle; 21, the first counterdie; 211, the first counterdie V-groove mouth; 212, the 2nd counterdie V-groove mouth; 22, the 2nd counterdie; 221, the angle edge of a knife; 3, lower die holder; 31, erection opening; 4, screw is lifted; 5, spring; I, the first doorframe section; II, the 2nd doorframe section; III, the 3rd doorframe section; IV, the 4th doorframe section.
Embodiment
For understanding the content of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
Referring to Fig. 1, a kind of antitheft door doorframe particular manufacturing craft of the present embodiment, comprise 2 molds, wherein, first mold comprises the first patrix 11 and the first counterdie 21, the top of the first patrix 11 is provided with mould handle, and the top that the bottom of the first patrix 11 is provided with V-type mould point 111, first counterdie 21 is provided with the first counterdie V-groove mouth 211 and the 2nd counterdie V-groove mouth 212 matched with above-mentioned V-type mould point 111. First mold mainly utilizes V-type mould point 111 and the coordinating of the first counterdie V-groove mouth the 211, the 2nd counterdie V-groove mouth 212, and completes the first one-step forming of antitheft door doorframe key structure.
Referring to Fig. 3,2nd mold of the present embodiment comprises the 2nd patrix 12, the 2nd counterdie 22, lower die holder 3 and resetting mechanism, the top of the 2nd patrix 12 is provided with mould handle 122, mould handle 122 is provided with pocket for the punch head, pocket for the punch head can make the 2nd patrix 12 firmly be connected with transmission rig, prevents the 2nd patrix 12 in bending and molding process from inclined pendulum occurring. The bottom of the 2nd patrix 12 is provided with V-groove mouth 121, and the top of the 2nd described counterdie 22 is provided with the angle edge of a knife 221 matched with V-groove mouth 121.
In the present embodiment, the angle at the groove point angle of V-groove mouth 121, the edge of a knife point angle of the angle edge of a knife 221 is a, and a is 90 °. V-groove mouth 121 is offered in 2nd patrix 12 bottom, 2nd counterdie 22 top arranges the angle edge of a knife 221, it it is a novelty design of the present embodiment, the present embodiment is by putting upside down design by V-groove mouth 121 and the angle edge of a knife 221, 2 objects can be reached: it is one years old, the angle edge of a knife 221 of the present embodiment comprises 3 binder surfaces (referring to Fig. 4), first binder surface and the 2nd binder surface composition edge of a knife 90 ° of sharp angles, 3rd binder surface and the first binder surface are parallel to each other, and first binder surface, the inclined-plane that 2nd binder surface is corresponding with V-groove mouth 121 is parallel to each other, first inclined-plane of the 3rd binder surface and lower die holder 3 cooperatively interacts, so, by the first binder surface, the obtuse angle of the 3rd doorframe section III and the 4th doorframe section IV is bent into right angle by inclined-plane cooperation that the 2nd binder surface is corresponding with V-groove mouth 121 further, simultaneously, cooperatively interacted by the first inclined-plane of the 3rd binder surface and lower die holder 3 and the acute angle of the first doorframe section I and the 2nd doorframe section II is flattened, the bending of the 3rd doorframe section III and the 4th doorframe section IV, the flanging operation of the first doorframe section I and the 2nd doorframe section II synchronously carries out, substantially increase the bending efficiency of bending press, two, V-groove mouth 121 and the angle edge of a knife 221 are put upside down design by the present embodiment, 2nd counterdie 22 presses down in bending process, the angle edge of a knife 221 can be utilized to lead, prevent the generation of pendulum partially between the 2nd patrix 12 and the 2nd counterdie 22, namely the anti-deflecting structure of design separately is eliminated, turn improve the working accuracy of antitheft door doorframe, ensure that processing quality.
Referring to Fig. 4 and Fig. 5, the present embodiment is from the angle obtaining the bending and molding effect more optimized, extending die life, also the CONSTRUCTED SPECIFICATION of the 2nd counterdie 22 and lower die holder 3 is optimized, the angle d comprising the first binder surface and vertical direction that arrange the 2nd counterdie 22 is 47 °, and (the angle e of the 3rd binder surface and vertical direction is 133 °, namely parallel with the first binder surface), the angle b of lower die holder 3 inclined-plane, top first and horizontal direction is 43 °, and the angle c of the 2nd inclined-plane and vertical direction is 45 °. The angle of inclination on lower die holder 3 the 2nd inclined-plane of the present embodiment design is slightly less than the angle of inclination of the 2nd counterdie 22 first binder surface, the angle of inclination on lower die holder 3 first inclined-plane is slightly less than the angle of inclination of the 2nd counterdie 22 the 3rd binder surface, it is to ensure to have between plate and inclined-plane, binder surface and inclined-plane one to allow angle, while ensureing formed precision, reduce the collision of the angle edge of a knife 221 with lower die holder 3, extend the mold use life-span.
Screw hole and spring hole have been offered in interval along its length in the bottom of the 2nd described counterdie 22, corresponding, lower die holder 3 also along its length interval offered erection opening 31 and spring hole, erection opening 31 is staged through hole, and the lower through-hole diameter of this staged through hole is greater than upper through-hole diameter. Spring hole is spacedly distributed, and quantity is 6/1 meter. Described resetting mechanism comprises lifting screw 4 and spring 5, the diameter of spring 5 is 16mm*60mm, it is arranged at the 2nd counterdie 22 and between the spring hole that lower die holder 3 is offered, lifting screw 4 is from the bottom of lower die holder 3 through erection opening 31 and is connected with the 2nd counterdie 22 by screw hole, the nut diameter of this lifting screw 4 is less than the lower through-hole diameter of erection opening 31, nut diameter is greater than the upper through-hole diameter of erection opening 31, and the lower through-hole degree of depth of erection opening 31 be necessarily greater than between the 2nd counterdie 22 and lower die holder 3 reset after height.
Referring to Fig. 7, the bending and molding method of a kind of antitheft door doorframe of the present embodiment, the steps include:
Step one, control between the first patrix 11 folding the 2nd doorframe section II and the 3rd doorframe section III in a right angle;
Step 2, the V-type mould controlling the first patrix 11 point 111 coordinates with the first counterdie V-groove mouth 211 on the first counterdie 21 top, rolls between the first doorframe section I and the 2nd doorframe section II in an acute angle;
Step 3, the V-type mould controlling the first patrix 11 point 111 coordinates with the 2nd counterdie V-groove mouth 212 on the first counterdie 21 top, in an obtuse angle between folding the 3rd doorframe section III and the 4th doorframe section IV;
The V-groove mouth 121 of step 4, control the 2nd patrix 12 coordinates with the angle edge of a knife 221 on the 2nd counterdie 22 top, roll between the 3rd doorframe section III and the 4th doorframe section IV in a right angle, simultaneously, flatten acute angle between the first doorframe section I and the 2nd doorframe section II, spring 5 resets, and bending molding process terminates.
The bending and molding method of the present embodiment is simple to operate, relative to using traditional moulds (a) in Fig. 6~(f) Suo Shi, antitheft door doorframe key structure is carried out bending and molding, 3 traditional molds, 6 procedures are reduced in order to 2 molds, 4 procedures by the present embodiment, avoid and bending and molding process is frequently changed mould, substantially increase the production efficiency of bending press. In addition, also it should be noted that, the operation of flanging shown in (e) in Fig. 6 has plate to collapse the danger, bending process shown in (f) also very coarse, first can not ensure between the 3rd doorframe section III and the 4th doorframe section IV in a reliable right angle, the length of its order three doorframe sections III can not ensure definitely to meet dimensional requirement, so very easily causes whole antitheft door doorframe not meet drawing requirement, and impact is sold.And the present embodiment can change the 2nd counterdie 22 according to drawing processing request, the 2nd binder surface length of the angle edge of a knife 221 is made to meet drawing to the dimensional requirement of the 3rd doorframe section III, and V-groove mouth 121 groove point angle, the angle edge of a knife 221 the edge of a knife point angle angle be 90 °, can ensure between the 3rd doorframe section III and the 4th doorframe section IV in a reliable right angle, more there will not be plate to collapse situation about when bending, flanging synchronously carry out, not only increase the working accuracy of antitheft door doorframe key structure, improve safety coefficient simultaneously.
In order to improve the result of use of the antitheft door doorframe particular manufacturing craft of the present embodiment, the present embodiment additionally provides the method for a kind of processing the 2nd mold, and the present embodiment processes the mould obtained, intensity height, long service life, each scantlings of the structure precision height. Specific process is:
One, starting material prepare: select materials as 42CrMo, mould adopts forging blank to obtain, the components based on weight percentage of this forging blank is: carbon 0.45, silicon≤0.40, manganese 0.90, sulphur allow residual content≤0.035, phosphorus to allow residual content≤0.035, chromium 1.20, molybdenum 0.30, and surplus is iron.
Forging blank is pulled out long forging, and forging ratio F1/F0 is 1:4, and wherein: F0 is the cross-sectional area of blank before forging, F1 is the cross-sectional area of blank after forging.
Two, after step one is forged, forging blank is carried out anneal: first forging blank loading heat treatment furnace is warming up to 760 DEG C, is incubated 6 hours, then moves out of heat treatment furnace and carry out sky and be as cold as 400 DEG C, obtain the blank of quenching and tempering hardness HB230.
The roughing of step 3, forging blank: after step 2 anneal, forging blank is made the workpiece leaving allowance for finish, quench treatment is carried out after roughing, 860 DEG C it are heated in 20 minutes, it is incubated and quenches after 45 minutes, quenchant is 2# quenching oil, then carries out twice tempering at 390 DEG C of temperature, and the mould hardness obtained is HRC47.
After step 4, mould precision work stay+0.2mm surplus, then carrying out 2 deep processings, upper grinding machine fine grinding puts in place to size further.
Embodiment 2
The bending and molding method of a kind of antitheft door doorframe of the present embodiment, substantially with embodiment 1, its difference is: the spring hole of the present embodiment is spacedly distributed, and quantity is 8/1 meter. The detailed process of the present embodiment processing the 2nd mold is:
One, starting material prepare: select materials as 42CrMo, mould adopts forging blank to obtain, the components based on weight percentage of this forging blank is: carbon 0.39, silicon≤0.40, manganese 0.70, sulphur allow residual content≤0.035, phosphorus to allow residual content≤0.035, chromium 1.10, molybdenum 0.16, and surplus is iron.
Forging blank is pulled out long forging, and forging ratio F1/F0 is 1:4, and wherein: F0 is the cross-sectional area of blank before forging, F1 is the cross-sectional area of blank after forging.
Two, after step one is forged, forging blank is carried out anneal: first forging blank loading heat treatment furnace is warming up to 755 DEG C, is incubated 5 hours, then moves out of heat treatment furnace and carry out sky and be as cold as 380 DEG C, obtain the blank of quenching and tempering hardness HB225.
The roughing of step 3, forging blank: after step 2 anneal, forging blank is made the workpiece leaving allowance for finish, quench treatment is carried out after roughing, 865 DEG C it are heated in 22 minutes, it is incubated and quenches after 45 minutes, quenchant is 2# quenching oil, then carries out twice tempering at 394 DEG C of temperature, and the mould hardness obtained is HRC46.
After step 4, mould precision work stay+0.2mm surplus, then carrying out 2 deep processings, upper grinding machine fine grinding puts in place to size further.
Embodiment 3
The bending and molding method of a kind of antitheft door doorframe of the present embodiment, substantially with embodiment 1, its difference is: the spring hole of the present embodiment is spacedly distributed, and quantity is 7/1 meter. The detailed process of the present embodiment processing the 2nd mold is:
One, starting material prepare: select materials as 42CrMo, mould adopts forging blank to obtain, the components based on weight percentage of this forging blank is: carbon 0.38, silicon≤0.38, manganese 0.60, sulphur allow residual content≤0.034, phosphorus to allow residual content≤0.033, chromium 0.90, molybdenum 0.15, and surplus is iron.
Forging blank is pulled out long forging, and forging ratio F1/F0 is 1:4, and wherein: F0 is the cross-sectional area of blank before forging, F1 is the cross-sectional area of blank after forging.
Two, after step one is forged, forging blank is carried out anneal: first forging blank loading heat treatment furnace is warming up to 750 DEG C, is incubated 4 hours, then moves out of heat treatment furnace and carry out sky and be as cold as 350 DEG C, obtain the blank of quenching and tempering hardness HB220.
The roughing of step 3, forging blank: after step 2 anneal, forging blank is made the workpiece leaving allowance for finish, quench treatment is carried out after roughing, 855 DEG C it are heated in 18 minutes, it is incubated and quenches after 40 minutes, quenchant is 2# quenching oil, then carries out twice tempering at 385 DEG C of temperature, and the mould hardness obtained is HRC45.
After step 4, mould precision work stay+0.2mm surplus, then carrying out 2 deep processings, upper grinding machine fine grinding puts in place to size further.
The bending and molding method of a kind of antitheft door doorframe described in embodiment 1~3,3 traditional molds, 6 procedures are improved to and only need to use 2 molds, carry out the bending and molding that 4 road manufacturing procedures can complete antitheft door doorframe key structure, avoid and bending and molding process is frequently changed mould, substantially increase production efficiency and the working accuracy height of bending press.
Schematically the present invention and enforcement mode thereof being described above, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto. So, if the those of ordinary skill of this area enlightens by it, when not departing from the invention objective, design the structure mode similar to this technical scheme and embodiment without creativeness, protection scope of the present invention all should be belonged to.

Claims (4)

1. the bending and molding method of an antitheft door doorframe, it is characterized in that: use 2 molds to complete the bending technique of antitheft door doorframe, in 2 described molds, first mold comprises the first patrix (11) and the first counterdie (21), the bottom of the first patrix (11) is provided with V-type mould point (111), and the top of the first counterdie (21) is provided with the first counterdie V-groove mouth (211) and the 2nd counterdie V-groove mouth (212) that match with above-mentioned V-type mould point (111);
2nd mold comprises the 2nd patrix (12), the 2nd counterdie (22), lower die holder (3) and resetting mechanism, the top of the 2nd patrix (12) is provided with mould handle (122), and the bottom of the 2nd patrix (12) is provided with V-groove mouth (121); The top of the 2nd described counterdie (22) is provided with the angle edge of a knife (221) matched with V-groove mouth (121), screw hole and spring hole have been offered in interval along its length in the bottom of the 2nd counterdie (22), corresponding, lower die holder (3) also along its length interval offered erection opening (31) and spring hole, erection opening (31) is staged through hole, and the lower through-hole diameter of this staged through hole is greater than upper through-hole diameter;Described resetting mechanism comprises lifting screw (4) and spring (5), between the spring hole that spring (5) is arranged at the 2nd counterdie (22) and lower die holder (3) is offered, lifting screw (4) is from the bottom of lower die holder (3) through erection opening (31) and is connected with the 2nd counterdie (22) by screw hole, the nut diameter of this lifting screw (4) is less than the lower through-hole diameter of erection opening (31), and nut diameter is greater than the upper through-hole diameter of erection opening (31); Bending and molding concrete steps are:
Step one, control the first patrix (11) folding the 2nd doorframe section (II) and the 3rd doorframe section (III) between be a right angle;
Step 2, V-type mould point (111) controlling the first patrix (11) coordinate with first counterdie V-groove mouth (211) on the first counterdie (21) top, roll between the first doorframe section (I) and the 2nd doorframe section (II) in an acute angle;
Step 3, V-type mould point (111) controlling the first patrix (11) coordinate with the 2nd counterdie V-groove mouth (212) on the first counterdie (21) top, in an obtuse angle between folding the 3rd doorframe section (III) and the 4th doorframe section (IV);
The V-groove mouth (121) of step 4, control the 2nd patrix (12) coordinates with the angle edge of a knife (221) on the 2nd counterdie (22) top, roll between the 3rd doorframe section (III) and the 4th doorframe section (IV) in a right angle, simultaneously, flatten acute angle between the first doorframe section (I) and the 2nd doorframe section (II), spring (5) resets, and bending molding process terminates.
2. the bending and molding method of a kind of antitheft door doorframe according to claim 1, it is characterised in that: the angle at the groove point angle of described V-groove mouth (121), the edge of a knife point angle of the angle edge of a knife (221) is 90 °.
3. the bending and molding method of a kind of antitheft door doorframe according to claim 2, it is characterized in that: the described angle edge of a knife (221) comprises 3 binder surfaces, first binder surface and the 3rd binder surface are parallel to each other, and the angle d of the first binder surface and vertical direction is 47 °.
4. the bending and molding method of a kind of antitheft door doorframe according to claim 3, it is characterized in that: described lower die holder (3) top comprises 2 inclined-planes, the angle b of the first inclined-plane and horizontal direction is 43 °, and the angle c of the 2nd inclined-plane and vertical direction is 45 °.
CN201410675691.5A 2014-11-21 2014-11-21 A kind of bending and molding method of antitheft door doorframe Active CN104475505B (en)

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CN106424377B (en) * 2016-12-25 2018-09-25 安徽力源数控刃模具制造有限公司 Integral type multistation flanging mold
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CN1042098A (en) * 1989-11-06 1990-05-16 北票市汽车暖风机厂 Forming process for automotive door and window frame section
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KR100651074B1 (en) * 2005-09-29 2006-12-01 김정임 A door frame making mould and making method of door frame thereof
US20090027596A1 (en) * 2006-02-24 2009-01-29 Nitto Denko Corporation Polarizing plate laminated with a retardation layer, liquid crystal panel, and liquid crystal display apparatus
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