CN111604392A - Machining method for accurately controlling metal plate bending line - Google Patents

Machining method for accurately controlling metal plate bending line Download PDF

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Publication number
CN111604392A
CN111604392A CN202010283652.6A CN202010283652A CN111604392A CN 111604392 A CN111604392 A CN 111604392A CN 202010283652 A CN202010283652 A CN 202010283652A CN 111604392 A CN111604392 A CN 111604392A
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CN
China
Prior art keywords
workpiece
positioning
bending line
positioning hole
bending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202010283652.6A
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Chinese (zh)
Inventor
邢国恒
蔡松年
喻红超
郑鹏飞
吴浩
丁义
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Dahewai Intelligent Equipment Co ltd
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Guangdong Dahewai Intelligent Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Dahewai Intelligent Equipment Co ltd filed Critical Guangdong Dahewai Intelligent Equipment Co ltd
Priority to CN202010283652.6A priority Critical patent/CN111604392A/en
Publication of CN111604392A publication Critical patent/CN111604392A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/002—Positioning devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The invention discloses a processing method for accurately controlling a sheet metal bending line, which comprises the following specific steps: extending the workpiece bending line to two ends; determining the position of a positioning hole on a workpiece; arranging a positioning block around the center of the positioning hole, and connecting the positioning block with the workpiece; a positioning pin in interference fit with the positioning hole is arranged in the positioning hole; placing the workpiece on a bending machine, enabling the surface of the workpiece, which is in contact with the upper die, to be upward, and tightly attaching positioning pins on two sides of the workpiece to two end surfaces of the lower die; the bending processing of the workpiece is realized through the interaction of the upper die and the lower die, and the method can accurately ensure the position precision of the bending line in the field requiring the position precision of the bending line, such as the aerospace field, and is simple and convenient.

Description

Machining method for accurately controlling metal plate bending line
Technical Field
The invention relates to the technical field of sheet metal bending line processing, in particular to a processing method for accurately controlling a sheet metal bending line.
Background
The sheet metal process generally includes a plate shearing machine, a numerical control punch/laser, a plasma, a water jet cutting machine, a bending machine and various auxiliary equipment such as an uncoiler, a leveler, a deburring machine, a spot welding machine, etc., generally, the most important four steps of the sheet metal process are shearing, punching/cutting, folding, welding, surface treatment, etc., sheet metal generally comprises the steps of punching a plurality of metal sheets by hands or dies to generate plastic deformation so as to form the desired shape and size, and can further form more complex parts by welding or small amount of mechanical processing, such as a common household chimney, a sheet iron furnace and an automobile shell which are sheet metal parts, in the existing sheet metal bending technology, the aerospace field with strict requirement on the position of a bending line is included, and the control on the position of the bending line is realized by visual observation and judgment, and uncertainty errors exist, so that the bending line position of the metal plate cannot be accurately controlled.
Disclosure of Invention
The invention aims to provide a processing method for accurately controlling a sheet metal bending line, which aims to solve the problem of uncertainty error caused by the fact that the position of the bending line is controlled by visual observation and judgment in the control of the position of the bending line in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a processing method for accurately controlling a sheet metal bending line comprises the following specific steps:
extending the workpiece bending line to two ends;
determining the position of a positioning hole on a workpiece;
arranging a positioning block around the center of the positioning hole, and connecting the positioning block with the workpiece;
a positioning pin in interference fit with the positioning hole is arranged in the positioning hole;
placing the workpiece on a bending machine, enabling the surface of the workpiece, which is in contact with the upper die, to be upward, and tightly attaching positioning pins on two sides of the workpiece to two end surfaces of the lower die;
the bending processing of the workpiece is realized through the interaction of the upper die and the lower die.
As a further scheme of the invention: the specific steps for determining the position of the positioning hole on the workpiece are as follows:
measuring the distance V between the center of the V-shaped groove of the lower die and the end surface of the lower die, and setting the diameter of a positioning hole as d;
and (3) offsetting the bending line on the workpiece by V +1/2d inwards, extending the bending line to a sufficient length outside the workpiece, and offsetting the side line of the workpiece by 1-3d outwards, wherein the intersection point of the two lines is the center of the positioning hole.
As a further scheme of the invention: the positioning block is a square positioning block, and the side length of the square positioning block is 2-3 d.
As a further scheme of the invention: the positioning block is a semicircular positioning block, and the radius of the semicircular positioning block is 2-3 d.
As a further scheme of the invention: the positioning pin is a flat-head positioning pin.
As a further scheme of the invention: and the positioning pin is pressed into the positioning hole by a squeeze riveter, and the head plane of the positioning pin is tightly attached to the surface of the workpiece plate.
As a further scheme of the invention: after the bending treatment of the workpiece is realized through the interaction of the upper die and the lower die:
and (4) after the bending angle and the bending line position on the workpiece are measured, taking down the workpiece.
As a further scheme of the invention: after the bending treatment of the workpiece is realized through the interaction of the upper die and the lower die:
and cutting off the positioning block at the positioning hole on the workpiece and grinding the cutting part.
Compared with the prior art, the invention has the beneficial effects that: the bending line in the bending expansion diagram is extended towards two ends; measuring the distance V between the center of the V-shaped groove of the lower die and the end face of the lower die, and setting the diameter d of a position hole; when drawing the development figure, the bending lines are shifted to the inner sideV +1/2d, extending to a sufficient length outside the workpiece, offsetting the side line of the workpiece by 1-3d outwards, wherein the intersection point of the two lines is the center of the positioning hole, a semicircular or square positioning block is reserved around the center of the positioning hole, the radius of the semicircle is 2-3d, or the side length of the square positioning block is 2-3d, the positioning block is connected with the workpiece, and 1 diameter d is processed by taking the two intersection points of the three straight lines as the center-0.10 0.20(2-6 MM according to the thickness of the plate and the diameter of the bending length); selecting a flat-head locating pin of diameter d+0.02The length of the pin rod part is t + (3-10) MM of the thickness of the workpiece to be bent; pressing the positioning pin along the surface with the bending line by using a riveting press to form small interference fit between the positioning pin and the positioning hole, enabling the head plane to be tightly attached to the surface of the workpiece plate, turning over the surface of the workpiece plate, measuring the perpendicularity of the positioning pin hole and the surface of the workpiece by using a square ruler, and correcting to ensure that the excircle plain line of the positioning pin is perpendicular to the surface of the workpiece plate; placing the workpiece on a bending machine, enabling one surface of the workpiece, which is in contact with the upper die, to be upward, and tightly attaching positioning pins on two sides of the workpiece to two end surfaces of the lower die; setting a bending angle on the control panel, and implementing bending; after the bending angle and the bending line position are measured, the workpiece is taken down, the positioning blocks where the two positioning pin holes are located are cut off, and the cutting positions are polished.
Drawings
FIG. 1 is a schematic view of a processing method for precisely controlling a sheet metal bending line;
FIG. 2 is a view taken along the line A in FIG. 1;
in the figure: 1-positioning block, 2-positioning hole, 3-positioning pin, 4-workpiece, 5-bending line, 6-lower die end face, 7-positioning hole center connecting line, 8-upper die and 9-lower die.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, in an embodiment of the present invention, a processing method for precisely controlling a sheet metal bending line includes the following specific steps:
extending the bending line 5 of the workpiece 4 to two ends;
determining the position of the positioning hole 2 on the workpiece 4;
a positioning block 1 is arranged around the center of the positioning hole 2, and the positioning block 1 is connected with a workpiece 4;
a positioning pin 3 in interference fit with the positioning hole 2 is arranged in the positioning hole;
placing the workpiece 4 on a bending machine, enabling the surface of the workpiece 4, which is in contact with the upper die 8, to be upward, and tightly attaching the positioning pins 3 on the two sides of the workpiece 4 to the two end surfaces of the lower die 9;
the bending process of the workpiece 4 is realized by the interaction of the upper die 8 and the lower die 9.
The determination of the position of the positioning hole 2 on the workpiece 4 is specifically as follows:
measuring the distance V between the center of the V-shaped groove of the lower die 9 and the end surface 6 of the lower die 9, and setting the diameter of the positioning hole 2 as d;
the bending line 5 is shifted inwards by V +1/2d on the workpiece 4, and is extended to a sufficient length beyond the workpiece 4, the side line of the workpiece 4 is shifted outwards by a distance of 1-3d, and the intersection point of the two lines is the center of the positioning hole 2.
The positioning block 1 is a square positioning block, and the side length of the square positioning block is 2-3 d.
The positioning block 1 is a semicircular positioning block, and the radius of the semicircular positioning block is 2-3 d.
The positioning pin 3 is a flat-head positioning pin 3.
The positioning pin 3 is pressed into the positioning hole 2 by a squeeze riveter, and the head plane of the positioning pin 3 is tightly attached to the surface of the workpiece 4.
After the bending treatment of the workpiece 4 is effected by the interaction of the upper die 8 and the lower die 9:
after the bending angle and the position of the bending line 5 on the workpiece 4 are measured, the workpiece 4 is taken down.
After the bending treatment of the workpiece 4 is effected by the interaction of the upper die 8 and the lower die 9:
and cutting off the positioning block 1 at the positioning hole 2 on the workpiece 4 and grinding the cutting part.
The bending line in the bending expansion diagram is extended towards two ends; measuring the distance V between the center of the V-shaped groove of the lower die and the end face of the lower die, and setting the diameter d of a position hole; when drawing an expanded view, the bending lines are deflected inwards by V +1/2d and extended to a length enough to be beyond the workpiece, the side lines of the workpiece are deflected outwards by a distance of 1-3d, the intersection point of the two lines is the center of the positioning hole, a semicircular or square positioning block is reserved around the center of the positioning hole, the radius of the semicircle is 2-3d, or the side length of the square positioning block is 2-3d, the positioning block is connected with the workpiece, and 1 diameter d is processed by taking two intersection points of the three straight lines as the center-0.10 0.20(2-6 MM according to the thickness of the plate and the diameter of the bending length); selecting a flat-head locating pin of diameter d+0.02The length of the pin rod part is t + (3-10) MM of the thickness of the workpiece to be bent; pressing the positioning pin along the surface with the bending line by using a riveting press to form small interference fit between the positioning pin and the positioning hole, enabling the head plane to be tightly attached to the surface of the workpiece plate, turning over the surface of the workpiece plate, measuring the perpendicularity of the positioning pin hole and the surface of the workpiece by using a square ruler, and correcting to ensure that the excircle plain line of the positioning pin is perpendicular to the surface of the workpiece plate; placing the workpiece on a bending machine, enabling one surface of the workpiece, which is in contact with the upper die, to be upward, and tightly attaching positioning pins on two sides of the workpiece to two end surfaces of the lower die; setting a bending angle on the control panel, and implementing bending; and after the bending angle and the bending line position are measured, taking down the workpiece, cutting off the positioning blocks where the two positioning pin holes are located, and polishing the cutting part.
Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.
Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (8)

1. The machining method for accurately controlling the sheet metal bending line is characterized by comprising the following specific steps:
extending the workpiece bending line to two ends;
determining the position of a positioning hole on a workpiece;
arranging a positioning block around the center of the positioning hole, and connecting the positioning block with the workpiece;
a positioning pin in interference fit with the positioning hole is arranged in the positioning hole;
placing the workpiece on a bending machine, enabling the surface of the workpiece, which is in contact with the upper die, to be upward, and tightly attaching positioning pins on two sides of the workpiece to two end surfaces of the lower die;
the bending processing of the workpiece is realized through the interaction of the upper die and the lower die.
2. The machining method for accurately controlling the sheet metal bending line according to claim 1, wherein the position of the positioning hole determined on the workpiece is specifically as follows:
measuring the distance V between the center of the V-shaped groove of the lower die and the end surface of the lower die, and setting the diameter of a positioning hole as d;
and (3) offsetting the bending line on the workpiece by V +1/2d inwards, extending the bending line to a sufficient length outside the workpiece, and offsetting the side line of the workpiece by 1-3d outwards, wherein the intersection point of the two lines is the center of the positioning hole.
3. The machining method for accurately controlling the sheet metal bending line according to claim 2, wherein the positioning block is a square positioning block, and the side length of the square positioning block is 2-3 d.
4. The machining method for accurately controlling the sheet metal bending line according to claim 2, wherein the positioning block is a semicircular positioning block, and the radius of the semicircular positioning block is 2-3 d.
5. The machining method for accurately controlling the sheet metal bending line according to claim 1, wherein the positioning pin is a flat-head positioning pin.
6. The processing method for accurately controlling the sheet metal bending line according to claim 1, wherein the positioning pin is pressed into the positioning hole by a squeeze riveter, and the head plane of the positioning pin is tightly attached to the surface of the workpiece plate.
7. The machining method for accurately controlling the sheet metal bending line according to claim 1, characterized in that after the bending treatment of the workpiece is realized through the interaction of the upper die and the lower die:
and (4) after the bending angle and the bending line position on the workpiece are measured, taking down the workpiece.
8. The machining method for accurately controlling the sheet metal bending line according to claim 1, characterized in that after the bending treatment of the workpiece is realized through the interaction of the upper die and the lower die:
and cutting off the positioning block at the positioning hole on the workpiece and grinding the cutting part.
CN202010283652.6A 2020-04-13 2020-04-13 Machining method for accurately controlling metal plate bending line Withdrawn CN111604392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010283652.6A CN111604392A (en) 2020-04-13 2020-04-13 Machining method for accurately controlling metal plate bending line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010283652.6A CN111604392A (en) 2020-04-13 2020-04-13 Machining method for accurately controlling metal plate bending line

Publications (1)

Publication Number Publication Date
CN111604392A true CN111604392A (en) 2020-09-01

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Application Number Title Priority Date Filing Date
CN202010283652.6A Withdrawn CN111604392A (en) 2020-04-13 2020-04-13 Machining method for accurately controlling metal plate bending line

Country Status (1)

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CN (1) CN111604392A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112906147A (en) * 2021-01-18 2021-06-04 北京安怀信科技股份有限公司 Ground interference identification method based on multiple metal plate bending

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112906147A (en) * 2021-01-18 2021-06-04 北京安怀信科技股份有限公司 Ground interference identification method based on multiple metal plate bending
CN112906147B (en) * 2021-01-18 2021-09-28 北京安怀信科技股份有限公司 Ground interference identification method based on multiple metal plate bending

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Application publication date: 20200901