CN109772993A - Superelevation single weld seam square and rectangular pipe moulding process and molding die by force - Google Patents
Superelevation single weld seam square and rectangular pipe moulding process and molding die by force Download PDFInfo
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- CN109772993A CN109772993A CN201811607643.7A CN201811607643A CN109772993A CN 109772993 A CN109772993 A CN 109772993A CN 201811607643 A CN201811607643 A CN 201811607643A CN 109772993 A CN109772993 A CN 109772993A
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Abstract
The invention belongs to superelevation single welded steel pipes production technical fields by force, more particularly to superelevation single weld seam square and rectangular pipe moulding process and molding die by force, the following steps are included: Step 1: blanking: ultra-high strength steel plate is selected, according to the measure of superelevation single weld seam square and rectangular pipe by force；Step 2: shaping: carrying out milling side/groove processing to the both sides in steel plate width direction, and eliminate steel plate side sway；Step 3: confirmation bending position: according to the size of superelevation single weld seam square and rectangular pipe by force, successively determining the first bending part, the second bending part, third bending part, the 4th bending part of steel plate on the surface of steel plate；Step 4: bending and molding: utilizing numerical control bending equipment elder generation the first bending part of bending and molding；Step 5: welding of closing up: carrying out shell nosing treatment after step 4 bending and then weld, reduce labor intensity of workers, pipe fitting precision is high, and high production efficiency, bending forms rear easy mold release.
Description
Technical field
The invention belongs to superelevation single welded steel pipes production technical fields by force, and in particular to superelevation by force single weld seam square and rectangular pipe at
Type technique and molding die.
Background technique
Aerial work platform and telescopic boom fire fighting truck etc. often use high-strength (or superelevation is strong) square steel tube knot
Structure, and single weld seam square tube is more favored.The production of single high-strength (or superelevation is strong) square steel tube of weld seam is usually in weld seam institute
One knife of opposite side elder generation bending on side forms back-flexing, and then turn-over completes remaining four bending again, finally again will be previous anti-
It flattens to curved plane, extracted out from upper mold side, to realize unsealed single weld seam square and rectangular pipe, forming process enters such as figure
Shown in 1, then welded, shaping, single weld seam square and rectangular pipe is finally obtained, the disadvantages of this method are: because needing back-flexing, workpiece
It needs turn-over and reverses end for end, labor intensity of workers is big, and workpiece positioning relies on scribing line, and precision is not easy to control, and the plane that recurvation flattens cannot
The straightness in the pressing face of being completely secured, inefficiency, and, the final step bending big to the risk of operator in operation
In molding, the plate body that two sides upwarp, which can be formed upper mold, sandwiches structure, can hit upper mold, easily cause upper mold damage, upwarp change
The clamping force of shape is big, and not easy mold release after bending influences production efficiency.
Summary of the invention
The technical problem to be solved by the present invention is in view of the foregoing drawbacks, provide superelevation single weld seam square and rectangular pipe molding work by force
Skill and molding die, solving existing superelevation, single weld seam square steel tube is in bending process by force, because of work caused by back-flexing
The problem of people's large labor intensity, precision be not easy to control, low efficiency, bending forms rear easy mold release, and production is efficient.
The technical solution adopted by the present invention to solve the technical problems is as follows:
Superelevation single weld seam square and rectangular pipe moulding process by force, comprising the following steps: Step 1: blanking: selecting ultra-high strength steel plate,
According to the measure of superelevation single weld seam square and rectangular pipe by force, steel plate is obtained, is reserved more than milling side/groove in the width direction of steel plate
Amount；
Step 2: shaping: milling side/groove processing is carried out to the both sides in steel plate width direction, steel plate body is corrected,
Eliminate steel plate side sway；
Step 3: confirmation bending position: on the basis of one end port of the width direction through step 2 treated steel plate,
Along steel plate width direction, according to the size of superelevation single weld seam square and rectangular pipe by force, the of steel plate is successively determined on the surface of steel plate
One bending part, the second bending part, third bending part, the 4th bending part, on steel plate width direction, the first bending part, the second folding
Crook, third bending part, the 4th bending part to benchmark port distance be sequentially increased；
Step 4: bending and molding: steel plate being placed on the Bending Mould of numerical control bending equipment, first the first folding of bending and molding
Crook, then the second bending part of bending and molding, subsequent the 4th bending part of bending and molding finally form third bending part, the first folding
Crook, the second bending part, the 4th bending part bending angle be 90 °, the bending angle of third bending part is less than 90 °, third
In bending part bending, by dedicated asymmetric bending lower die, asymmetric free bending is carried out to third bending part, is bent into
By removing in numerical control bending equipment after type, the single weld seam side rectangular bloom pipe by force of the superelevation with an opening is obtained；
Step 5: welding of closing up: single weld seam side rectangular bloom pipe carries out closing in Shape correction to the superelevation obtained to step 4 by force,
Make the opening closure of superelevation single weld seam side's rectangular bloom pipe by force, superelevation is welded after the opening closure of single weld seam side rectangular bloom pipe by force
It connects, carries out Shape correction after welding again, obtain superelevation single weld seam side rectangle finished product by force.
Superelevation single weld seam square and rectangular pipe molding die by force, including the upper mold being arranged on numerical control bender gooseneck pattern handle
The lower mold portion in portion, upper mold portion bottom side, the lower mold portion include lower die holder, confinement block, left panel, right panel, the lower die
Seat is equipped with a forming tank, and left panel, right panel are separately positioned on two opposite side-walls in forming tank, and left panel, right panel are equal
It is detachably connected with molding groove sidewall, is equipped between left panel, right panel and molding groove sidewall and left panel is adjusted, right panel arrives
The regulating mechanism of upper mold portion center distance, the confinement block are arranged between left panel, right panel, the two sides of confinement block
The spring that face moves up and down to the corresponding face contact of left panel, right panel, the groove bottom of forming tank equipped with support confinement block respectively,
Confinement block is equipped with the location structure for avoiding workpiece from sliding.
Further, the regulating mechanism is multiple backing plates, and left panel, right panel are connected by screw and molding groove sidewall
It connects, corresponding position is equipped with the through-hole of attachment screw on backing plate.
Further, the spring is fixed in forming tank by stepped screw.
Further, the left panel is before the close molding groove center of front end face, right panel of molding groove center
End face forms second level die orifice contact surface, and right panel to upper mold centre distance is greater than left panel to upper mold centre distance.
Further, the position limiting structure is the limiting slot for being provided with the middle of confinement block upper surface.
The beneficial effects of the present invention are: using the above scheme, the present invention makes full use of high-strength, ultra-high strength steel plate elasticity special
Sign, application is unique, asymmetric free bending method, using special upper and lower mold by gradually, continuously carrying out to steel plate
The degree that Bending Processing, greatly reduction steel plate clamp upper mold is restored to the original state by elasticity after the completion of bending, reaches part
The closure of opening, the disposable bending for completing single weld seam square steel tube part do not need to carry out steel plate turn-over, u-turn behaviour
Make, continuous bending is only rearranged by the sequence to bending part, on the one hand continuous bending forming alleviates worker's
Labor intensity keeps the regular shape of pipe fitting, consistency good, without turn-over, u-turn, reduces the risk of production, another party
Face is high-efficient, is 5~10 times of existing method, is able to satisfy the demand of mass production, forming method is practical.
Detailed description of the invention
Through the following detailed description taken in conjunction with the accompanying drawings, present invention objects, features and advantages above-mentioned and other will become
Obviously.
Fig. 1 is existing square steel tube bending technique flow chart.
Fig. 2 is the process flow chart of bending and molding in the present invention.
Fig. 3 is the structural schematic diagram of Bending Mould in one embodiment of the present invention.
Fig. 4 is the working state schematic representation of Bending Mould in one embodiment of the present invention.
Wherein: 1 is upper mold portion, and 2 be lower die holder, and 21 be forming tank, and 3 be confinement block, and 31 be limiting slot, and 4 be left panel, 5
It is backing plate for right panel, 6,7 be spring, and I is the first bending part, and II is the second bending part, and III is third bending part, and IV is the 4th
Bending part.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Process example: referring to Fig. 2, superelevation single weld seam square and rectangular pipe moulding process by force, comprising the following steps:
Step 1: blanking: selecting high-strength, the super-high strength steel scutum material of yield strength σ s≤700MPa, plate has preferable
Elastic characteristic the developed dimension of pipe fitting is calculated, according to what is calculated according to the compact dimensions of superelevation single weld seam square and rectangular pipe by force
Developed dimension carries out cutting stock to plate, obtains steel plate, reserves milling side/groove surplus in the width direction of steel plate；
Step 2: shaping: milling side, which is carried out, using width direction both ends of the edge milling machines to steel plate obtained in step 1 handles,
Finishing improves the precision of steel plate, processes welding at the both ends of the width direction of steel plate using retaining wall on slope equipment just shape
Groove, be convenient for subsequent welding, steel plate body is corrected using correcting device, eliminate steel plate side sway, ensure steel plate it is smooth,
Dimensional accuracy with higher；
Step 3: confirmation bending position: on the basis of one end port of the width direction through step 2 treated steel plate,
According to the size being unfolded after the superelevation by force molding of single weld seam square and rectangular pipe, the width in each face is calculated, steel plate is obtained and needs to roll over
The location parameter of crook, along steel plate width direction, successively determines steel plate on the surface of steel plate according to the location parameter of calculating
First bending part I, the second bending part II, third bending part III, the 4th bending part IV, on steel plate width direction, the first bending
Place, the second bending part, third bending part, the 4th bending part to benchmark port distance be sequentially increased, control superelevation single weld seam by force
The position of single weld seam of square and rectangular pipe is in the middle of square and rectangular pipe one side, square and rectangular pipe about commissure bilateral symmetry,
Symmetrical about weld seam, class promotes stress distribution after the welding fabrication of rectangular tube balanced, promotes the structural strength for improving pipe fitting, and
And facilitate the bending and molding of steel pipe, promote to improve production efficiency；
Step 4: bending and molding: steel plate being placed into numerical control bending equipment, steel plate is in the upper and lower mould of Bending Mould
Between, it, will be at the upper and lower mold forming of the first bending part of steel plate and Bending Mould using numerical control bender back material stopping fixing steel plate
Consistency from top to bottom starts bending machine, carries out bending to the first bending part, the bending angle of the first bending part is 90 °, then successively right
Second bending part, the 4th bending part carry out bending and molding, and bending angle is 90 °, last bending and molding third bending part, third
For the bending angle of bending part less than 90 °, the bending and molding at first three will not generate upper mold interference phenomenon, that is, the first bending
Place, the second bending part, the 4th bending part bending and molding in, the plate body of tilting will not collide upper mold, in being bent into for pipe fitting
In type, since the first bending part, the second bending part have formed, the amplitude that causes the bending and molding plate body of third bending part to tilt
Greatly, in bending third bending place, the first molded bending part, the second bending part will certainly plate body upwarp shock upper mold, produce
Raw interference phenomenon, even if using gooseneck type upper mold, the plate body of tilting can still be collided, and the plate body upwarped can block in gooseneck type
Mould causes a departure from difficulty, and the magnitude of plate body elastic bending is big, and technique of the present invention, form first the first bending part,
The molding of second bending part, and then forms the 4th bending part, and the purpose is to the two sides of third bending part to have bending sky of relatively growing up
Between, the second bending part provides space for third bending part bending forming, makes to have become to having biggish span between the 4th bending part
First bending part of type, the corresponding steel plate body of the second bending part farther out, in bending third bending part, are rolled over apart from gooseneck pattern handle
Bent angle less than 90 °, control it is molded after tilt plate body both ends will contact upper mold, due to two sides at this plate body
Molding, and the volume of molded plate body is different, the bending and molding at this is unsymmetric structure, passes through dedicated asymmetric bending
Lower die carries out asymmetric free bending to third bending part, this bending and molding is asymmetric free bending method, and both ends are non-
Symmetrically, the degree upwarped is different, and the amount of upwarping is different, so that the degree that steel plate two sides clamp upper mold is suitable, and reduces and needs steel
Plate generates the magnitude of elastic bending, that is, reduces clamping force, can directly be detached from after bending and molding, and pipe fitting is detached from upper mold and is easier,
Last bending third bending part, avoids generating interference phenomenon, by removing in numerical control bending equipment after bending and molding, obtains having one
The superelevation of opening single weld seam side's rectangular bloom pipe by force, after disengaging, for the structure with an opening, opening is commissure,
Step 5: welding of closing up: single weld seam side rectangular bloom pipe carries out closing in Shape correction to the superelevation obtained to step 4 by force,
Make the opening closure of superelevation single weld seam side's rectangular bloom pipe by force, superelevation is welded after the opening closure of single weld seam side rectangular bloom pipe by force
It connects, carries out Shape correction after welding again, obtain superelevation single weld seam side rectangle finished product by force.
This moulding process does not need to carry out steel plate turn-over, u-turn operation in production superelevation by force single weld seam square and rectangular pipe,
Continuous bending is only rearranged by the sequence to bending part, on the one hand continuous bending forming alleviates the labour of worker
Intensity keeps the regular shape of pipe fitting, consistency good, without turn-over, u-turn, reduces the risk of production, on the other hand imitates
Rate is high, is 5~10 times of existing method, is able to satisfy the demand of mass production, forming method is practical.
Constructive embodiment: referring to Fig. 3, Fig. 4, superelevation single weld seam square and rectangular pipe molding die by force, the upper mold including gooseneck type
The lower mold portion in portion 1,1 bottom side of upper mold portion, lower mold portion include lower die holder 2, confinement block 3, left panel 4, right panel 5, and lower die holder 2 is equipped with
One forming tank 21 opened up along mold front-rear direction, the opposite left and right sides being arranged in forming tank 21 of left panel 4, right panel 5
At wall, left panel 4, right panel 5 are detachably connected by the side wall of the screw being laterally arranged and the left and right sides of forming tank, left
Multiple left panel 4, right panels 5 of being adjusted are equipped between panel 4, right panel 5 and the side wall of forming tank 21 to upper mold portion centre bit
The backing plate 6 of distance is set, the number of backing plate 6 is muti-piece, and the thickness of backing plate 6 is different, has the through-hole passed through for screw on backing plate 6, leads to
The backing plate 6 for crossing replacement different-thickness or respective numbers adjusts the distance between left panel 4, right panel 5, controls left panel 4, the right side
Panel 5 arrives the position at upper mold portion center respectively, and the front end of the close molding groove center of left panel 4 is 90 ° of right-angle structures, formation pair
Steel plate has the left side second level die orifice contact surface of a supporting point, and right panel 5 is inside 90 ° close to the front end of molding groove center
The inner concave right angle structure of recess, inner concave right angle structure form right side second level die orifice contact surface, right side second level die orifice contact surface
There are two the supporting point of supporting steel plate, left side second level die orifice contact surface, right side second level die orifice contact surfaces to constitute lower mold portion for tool
Second level die orifice contact surface, confinement block 3 be arranged between left panel 4, right panel 5, the two sides of confinement block 3 respectively with left edge
Item 4, the inner end face contact of right panel 5 and conflict, the groove bottom of forming tank 21 are equipped with the spring 7 that support confinement block 3 moves up and down,
3 upper surface of confinement block is equipped with limiting slot 31, and limiting slot 31 and upper mold portion bottom end are opposite up and down, is at this at steel plate bending deformation,
Bottom end is in limiting slot at this, is equipped with a limiting slot 31 at corresponding 1 center of upper mold portion, limiting slot 31 be used for at steel plate bending
Bottom end face contact avoids left and right displacement at steel plate bending to limiting at steel plate bending, and spring 7 is fixed by stepped screw
In forming tank 21, the left-right position of confinement block 3 is limited by left panel, right panel, and left panel, right panel, backing plate pass through screw
It is connect with lower die holder molding groove sidewall, spring is connect by stepped screw with lower die holder groove bottom, and spring floats confinement block
Dynamic support keeps the activity of confinement block or more, and lower die becomes an entirety, and forming tank notch forms the contact of first order die orifice
Face, the height of first order die orifice contact surface are not less than the height of second level die orifice contact surface, after steel plate placement positioning, upper mold portion 1
It pushes, upper mold portion bottom end covers steel plate on confinement block 3, and bottom end be in limiting slot at steel plate bending, is bending change at this
Form point, limited block carry out the support of bottom to steel plate, and limiting slot limits the position of bending deformation point, avoid in upper mold portion pushing
Steel plate stress leads to plate body transverse shifting, and mold is avoided to damage, and spring provides the support of bottom for confinement block, and spring makes confinement block
With the dynamic balancing enabling capabilities moved up and down, the dynamics that can avoid upper mold portion pushing using spring supporting is excessive to cause mold
Damage, steel plate gradually bending, steel plate both ends gradually upwarp, and the initial deformation of steel plate, the plate body of bending deformation point two sides is by first
The support of grade die orifice contact surface is directly supported by second level die orifice contact surface, and steel plate continues to deform, when steel plate deformed angle is
At 110 °, the support point contact of plate body bottom end and left side second level die orifice contact surface on the left of bending deformation point, due to left side second
Grade distance of the die orifice contact surface away from bending center is less than distance of the right side second level die orifice contact surface away from upper mold center, bending deformation
Point right side plate body bottom end and first support point contact by side second level die orifice contact surface, first supporting point is than the second support
Point is higher than the first support point height close to molding groove center, the second support point height, and with the continuation of bending, bending deformation point is left
The steel plate body of side and the variable angle amount at bending center are greater than the steel plate body on the right side of bending deformation point and the folder at bending center
Angle variable quantity can make steel plate is whole to rotate to the right an angle around upper mold portion mould point fillet center, this rotation angle can be with
Reduce the gooseneck depth of upper mold, while also further decreasing the thickness of upper mold, right side steel plate body and the first supporting point, second
Support point contacts, and deflection is greater than right side on the left of bending deformation point, finally makes steel plate bending at the pipe fitting with opening, molding
Afterwards, elastic deformation amount needed for steel plate reduces, to reduce steel plate body two sides to the clamping degree of upper mold, reduces clamping
Power, and then it is easier pipe fitting demoulding, this molding die is asymmetric Bending Mould, is used for asymmetric bending and molding steel plate
Processing is still symmetrical free bending at Bending Processing initial stage (110 ° of bending angle ﹥) using in the Bending Processing of this mold,
With continue bending, when roll over curved angle degree≤110 °, steel plate left side plate body contacted with the second level die orifice of left panel, the die orifice away from
The distance at bending center is less than distance of the right panel second level die orifice away from upper mold center, with the continuation of bending, steel plate left plate
The variable angle amount at body and bending center is greater than right side, that is, part has rotated to the right one around upper mold mould point fillet center
A angle, this rotation angle can reduce the gooseneck depth of upper mold, while also further decrease the thickness of upper mold, finally make
Elastic deformation amount needed for steel plate reduces, reduces steel plate to the clamping degree of upper mold, and then is easier part removal, limits
The limiting slot of block can limit offset of the upper mold in asymmetric bending, by controlling left panel, right panel to upper mold center
Distance, the angle for making workpiece rotation certain in bending, both sides asymmetry bending deformation reduce plate elastic deformation amount, reduce
To the clamping force of upper mold, convenient for demoulding, meanwhile, it avoids interfering between upper mold and plate, avoids damage to mold, it is raw to improve bending
Efficiency is produced, workpiece limits the effective progress for guaranteeing asymmetric bending by confinement block, this mould structure is simple, and it is low in cost,
Versatility is high, processes a variety of large scale bending parts, and the asymmetric upper alice of plate body hits upper mold, effectively protects upper mold, keep away
Exempt to damage, extends the service life of mold.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, it is all according to
According to any simple modification to the above embodiments in technical spirit of the invention, equivalent variations, guarantor of the invention is each fallen within
Within the scope of shield.
Claims (6)
1. superelevation single weld seam square and rectangular pipe moulding process by force, which comprises the following steps:
Step 1: blanking: ultra-high strength steel plate is selected, according to the measure of superelevation single weld seam square and rectangular pipe by force, obtains steel plate,
The width direction of steel plate reserves milling side/groove surplus；
Step 2: shaping: carrying out milling side/groove processing to the both sides in steel plate width direction, corrected to steel plate body, eliminated
Steel plate side sway；
Step 3: confirmation bending position: on the basis of one end port of the width direction through step 2 treated steel plate, along steel
Board width direction the first folding of steel plate is successively determined on the surface of steel plate according to the size of superelevation single weld seam square and rectangular pipe by force
Crook, the second bending part, third bending part, the 4th bending part, on steel plate width direction, the first bending part, the second bending part,
Third bending part, the 4th bending part to benchmark port distance be sequentially increased；
Step 4: bending and molding: steel plate being placed on the Bending Mould of numerical control bending equipment, first the first bending of bending and molding
Place, then the second bending part of bending and molding, subsequent the 4th bending part of bending and molding finally form third bending part, the first bending
Place, the second bending part, the 4th bending part bending angle be 90 °, the bending angle of third bending part less than 90 °, third folding
In the bending of crook, by dedicated asymmetric bending lower die, asymmetric free bending, bending and molding are carried out to third bending part
Afterwards by removing in numerical control bending equipment, the single weld seam side rectangular bloom pipe by force of the superelevation with an opening is obtained；
Step 5: welding of closing up: single weld seam side rectangular bloom pipe carries out closing in Shape correction to the superelevation obtained to step 4 by force, makes to surpass
The opening closure of high-strength list weld seam side rectangular bloom pipe, superelevation are welded after the opening closure of single weld seam side rectangular bloom pipe by force,
Shape correction is carried out after welding again, obtains superelevation single weld seam side rectangle finished product by force.
2. superelevation single weld seam square and rectangular pipe molding die by force, including be arranged on numerical control bender gooseneck pattern handle upper mold portion,
The lower mold portion of upper mold portion bottom side, which is characterized in that the lower mold portion includes lower die holder, confinement block, left panel, right panel, institute
The lower die holder stated is equipped with a forming tank, and left panel, right panel are separately positioned on two opposite side-walls in forming tank, left panel,
Right panel with molding groove sidewall be detachably connected, left panel, right panel and molding groove sidewall between be equipped be adjusted left panel,
Right panel is to the regulating mechanism of upper mold portion center distance, and the confinement block setting is between left panel, right panel, limitation
Respectively to the corresponding face contact of left panel, right panel, the groove bottom of forming tank, which is equipped with, supports confinement block to transport up and down for the two sides of block
Dynamic spring, confinement block are equipped with the location structure for avoiding workpiece from sliding.
3. superelevation according to claim 1 single weld seam square and rectangular pipe molding die by force, which is characterized in that the adjusting machine
Structure is multiple backing plates, and left panel, right panel are connect by screw with molding groove sidewall, and corresponding position is equipped with attachment screw on backing plate
Through-hole.
4. superelevation according to claim 1 single weld seam square and rectangular pipe molding die by force, which is characterized in that the spring is logical
Stepped screw is crossed to be fixed in forming tank.
5. superelevation according to claim 1 single weld seam square and rectangular pipe molding die by force, which is characterized in that the left panel
Front end face close to the close molding groove center of front end face, right panel of molding groove center forms second level die orifice contact surface, right edge
Item is greater than left panel to upper mold centre distance to upper mold centre distance.
6. superelevation according to claim 1 single weld seam square and rectangular pipe molding die by force, which is characterized in that the limit knot
Structure is the limiting slot for being provided with the middle of confinement block upper surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811607643.7A CN109772993B (en) | 2018-12-27 | 2018-12-27 | Ultrahigh-strength single-weld square and rectangular pipe forming process and forming die |
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| CN201811607643.7A CN109772993B (en) | 2018-12-27 | 2018-12-27 | Ultrahigh-strength single-weld square and rectangular pipe forming process and forming die |
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| CN109772993B CN109772993B (en) | 2020-07-17 |
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Denomination of invention: Forming Technology and Mold for Ultra High Strength Single Weld Square Rectangular Tube Effective date of registration: 20230920 Granted publication date: 20200717 Pledgee: China Zheshang Bank Co.,Ltd. Changzhou Branch Pledgor: CHANGZHOU KANEKEN STEEL SECTION CO.,LTD. Registration number: Y2023980057563 |