CN112191963A - Sheet part machining method - Google Patents
Sheet part machining method Download PDFInfo
- Publication number
- CN112191963A CN112191963A CN202011086653.8A CN202011086653A CN112191963A CN 112191963 A CN112191963 A CN 112191963A CN 202011086653 A CN202011086653 A CN 202011086653A CN 112191963 A CN112191963 A CN 112191963A
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- Prior art keywords
- parison
- cutting
- blank
- processing method
- thin plate
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003754 machining Methods 0.000 title claims description 6
- 238000005520 cutting process Methods 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000003672 processing method Methods 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000003801 milling Methods 0.000 claims description 24
- 238000003825 pressing Methods 0.000 claims description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 235000012149 noodles Nutrition 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H5/00—Combined machining
Abstract
The invention provides a sheet part processing method, which comprises the steps of cutting and blanking a parison along a length direction by a line, planing the front and the back of the parison along the line cutting material lines, and penetrating a through groove on the back of the line cutting process. The invention can effectively solve the deformation problem of the sheet part, efficiently finish the processing of the sheet part, and has the advantages of high product surface quality, stable and reliable dimensional precision, good consistency, compact process flow, high production efficiency, convenient operation and low labor intensity.
Description
Technical Field
The invention relates to a method for processing a thin plate part.
Background
Because the thin plate parts have light weight, less material consumption and compact structure, the thin plate parts are applied by more and more industries. On the premise of ensuring the service performance, in order to reduce the weight, the aluminum alloy is mainly used as the material, the thickness is small, and the rigidity is poor. As the electronic element mounting plate shown in figures 1 and 2, the total thickness of parts is 4mm, the upper surface and the lower surface are respectively provided with a rectangular boss and a rectangular through groove, and in addition, 5 special-shaped mounting holes consisting of round holes and strip-shaped grooves are uniformly arranged on the upper surface.
The main disadvantages of the prior art are: (1) by adopting a sawing blanking mode, the cutting heat and cutting force generated in the sawing process redistribute the stress of the blank to cause the deformation of the blank. (2) The vice is adopted for clamping for milling, and the clamping force is applied to the side surface of the workpiece, so that the workpiece is easy to generate flexural deformation; the sawed blank has rough periphery and inconsistent size, so that the clamping force of the blank in the vice is uneven, the blank is tilted, and the processed surface is arched. (3) The front and back large surfaces are milled by the disc milling cutter which feeds back and forth for multiple times, the contact area of the cutter is large, the cutting force is large, the temperature is increased, the heat is not easy to take away, and the stress deformation and the thermal deformation caused by the cutting force and the cutting heat are avoided. (4) The processed two side surfaces of the rectangular boss are clamped by a vice, and when a reverse rectangular through groove is processed, the flatness is poor, the number of tool connecting marks is large, and the surface quality is not high due to the fact that the sheet is thin in wall, poor in rigidity and prone to flutter. In conclusion, the general processing method is adopted, the deformation of the processed parts is serious, the surface quality is poor, the dimensional precision and the surface roughness are not easy to guarantee, the product consistency is poor, the qualification rate is low, and the production cost is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a thin plate part machining method which can effectively solve the deformation problem of the thin plate part, efficiently complete the machining of the thin plate part, and has the advantages of high product surface quality, stable and reliable dimensional precision and good consistency.
The invention is realized by the following technical scheme.
The invention provides a sheet part processing method, which comprises the steps of cutting and blanking a parison along a length direction by a line, planing the front and the back of the parison along the line cutting material lines, and penetrating a through groove on the back of the line cutting process.
Preferably, the method specifically comprises the following steps:
feeding: cutting the blank into a parison in a linear cutting mode, wherein the width direction of the parison is the material grain direction;
cutting: milling the side surface of the blank with the accuracy of straightness less than 0.5 mm;
③ cutting the noodles: planing the front surface and the back surface of the parison along the length direction of the parison;
cutting: milling and forming the blank with the accuracy of straightness less than 0.05 mm;
wire cutting: the reverse side of the wire cutting process penetrates through the through groove.
The thickness of the parison is less than 10mm, and the length and the width of the parison are both greater than 50 mm.
The parison is an aluminum alloy rolled plate.
And in the second step, milling by using an end mill with the diameter of phi 6.
In the third step, the planing direction is perpendicular to the material grain direction.
In the third step, the planing planeness is 0.03 mm-0.07 mm.
In the fourth step, the structures of the boss and the hole are milled firstly, and then the outline structure is milled.
In the second step and the fourth step, the parison is fixed in a lateral compression mode; and in the third step, the parison is fixed by adopting a pressing plate pressing mode.
The invention has the beneficial effects that: the method can effectively solve the deformation problem of the sheet part, efficiently finish the processing of the sheet part, and has the advantages of high product surface quality, stable and reliable dimensional precision, good consistency, compact process flow, high production efficiency, convenient operation and low labor intensity.
Drawings
FIG. 1 is a schematic side view of a thin plate part to be processed according to the present invention;
fig. 2 is a top view of fig. 1.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The invention provides a sheet part processing method, which comprises the steps of cutting and blanking a parison along a length direction by a line, planing the front and the back of the parison along the line cutting material lines, and penetrating a through groove on the back of the line cutting process.
Preferably, the method specifically comprises the following steps:
feeding: cutting the blank into a parison in a linear cutting mode, wherein the width direction of the parison is the material grain direction;
cutting: milling the side surface of the blank with the accuracy of straightness less than 0.5 mm;
③ cutting the noodles: planing the front surface and the back surface of the parison along the length direction of the parison;
cutting: milling and forming the blank with the accuracy of straightness less than 0.05 mm;
wire cutting: the reverse side of the wire cutting process penetrates through the through groove.
The thickness of the parison is less than 10mm, and both the length and the width are greater than 50 mm.
The parison is an aluminum alloy rolled plate.
And step two, milling by using an end mill with the diameter of phi 6.
In the third step, the planing direction is perpendicular to the material grain direction.
In the third step, the planing planeness is 0.03 mm-0.07 mm.
And fourthly, firstly milling the boss and hole structures, and then milling the outline structure.
In the second step and the fourth step, the parison is fixed in a lateral compression mode; and in the third step, the parison is fixed by adopting a pressing plate pressing mode.
Example 1
By adopting the scheme, the sheet part shown in figures 1 and 2 is processed, and the method mainly comprises the following steps:
1. wire cutting blanking: an aluminum alloy rolled plate 2A 12H 112 having a thickness of 6mm was cut into a rectangular slab having a size of 127mm X67 mm by a wire-cut electrical discharge machine so that the slab width direction was the grain direction and the length direction was perpendicular to the grain direction.
2. Milling four side surfaces:
(a) placing a rectangular blank with the diameter delta of 6mm multiplied by 127mm multiplied by 67mm on a working table of a milling machine, roughly straightening two adjacent planes of the blank by using a dial indicator to ensure that the straightness of the blank is within 0.2mm, and pressing the blank by using a pressing plate;
(b) and (3) milling the four side surfaces by using an end mill with the diameter of phi 6 in a mode of converting a pressing plate, ensuring that the size of the processed blank is 122mm multiplied by 62mm, and ensuring that the verticality of each adjacent two surfaces of the four side surfaces of the blank is 0.05 mm.
3. Planing the front and back large surfaces:
(a) placing a rectangular blank with the size of delta 6mm, multiplied by 122mm and multiplied by 62mm on a working table of a planer, and enabling the length direction of the blank to be consistent with the planing direction of the planer, namely the planing direction of the planer is vertical to the grain direction of the material;
(b) the rear side surface of the blank is tightly attached to two cylindrical stop blocks which are arranged on the same horizontal line in a spanning mode, the right side surface of the blank is tightly attached to the other cylindrical stop block, the upper plane of each stop block is 2mm lower than the upper plane of the blank, the front side surface of the blank is compressed by a lateral compression assembly, an oblique-mouth sliding block is in line contact with the front side surface of the blank, and an oblique angle of 10 degrees is formed downwards after the blank; the lateral compression assembly consists of a guide sliding seat, an inclined opening sliding block and a full-thread bolt, the guide sliding seat is fixed on the working table, the inclined opening sliding block is placed in a sliding groove in the guide sliding seat in a clearance sliding fit mode, and the front end of the inclined opening sliding block is an inclined plane which is 10 degrees downwards. The full-thread bolt penetrates through the side wall of the guide sliding seat and is connected with the bevel opening sliding block. The full-thread bolt is detachably connected with the guide sliding seat and the bevel slider by threads, and the bevel slider moves forwards or backwards under the guidance of the sliding groove in the guide sliding seat when the bolt is screwed down or unscrewed;
(c) and (4) planing, namely, turning the blank after one planed surface is planed, planing the other surface by using the planed surface as a reference by using the same clamping method, and turning twice back and forth in such a way, so that the machining of the front and back large surfaces can be finished, wherein the thickness dimension of the blank is machined from 6mm to 4mm, and the flatness is 0.05 mm.
4. Numerical control milling:
(a) the method comprises the steps of placing a rectangular blank with the diameter delta of 4mm multiplied by 122mm multiplied by 62mm on a working table of a triaxial machining center, straightening two adjacent planes of the blank by using a dial indicator to enable the straightness to be within 0.05mm, symmetrically arranging four pressing plates to press the blank, and enabling the pressing plates to extend into the blank to be 5mm in length during pressing.
(b) 5 special-shaped mounting holes consisting of round holes and strip-shaped grooves and rectangular bosses on the upper surface are milled by a phi 5 straight shank end mill. The feeding speed is 800 mm/min, the rotating speed is 5000 r/min, the cutting depth of each knife is 0.5mm, and the cutting width is 2 mm. Each special-shaped mounting hole is finished by 8 cutters in the depth direction (4mm/0.5mm is 8), and the rectangular boss on the upper surface is finished by 3 cutters in the depth direction (1.5mm/0.5mm is 3).
(c) And (5) milling the outline by using a phi 5 straight shank end mill. The feeding speed is 500 mm/min, the rotating speed is 3000 r/min, three cutters are processed in the depth direction, the cutting depth of each cutter of the first two cutters is 0.9mm, the cutting depth of the third cutter is 0.55mm, and finally 0.15mm is reserved to ensure that the workpiece and the blank are connected. (2.5 mm. times.0.9 mm. times.2 +0.55mm +0.15 mm).
5. And removing the 0.15mm blank of the connecting workpiece by the metal plate, separating the blank from the workpiece, and removing burrs and flashes on the workpiece.
6. Cutting the reverse side rectangular through groove by wire cutting: the workpiece is vertically placed on a workbench of the wire cutting machine tool, so that the large plane is arranged up and down, and the small plane is arranged on the left and right. And (5) straightening the workpiece, aligning the benchmark, and cutting the penetrating groove with the length dimension of 102 mm. And after the cutting is finished, removing burrs generated by the wire cutting.
Therefore, the scheme of the invention is as follows:
1. the wire cutting blanking is adopted to replace the traditional sawing blanking, the stress is small, the surface quality is good, the deformation of the blank is reduced, and the quality of the blank is improved.
2. The width direction of the blank is the material grain direction, and the length direction is vertical to the material grain direction. Because the elongation of the material along the grain direction is far greater than that of the material perpendicular to the grain direction, if the length direction of the blank is the grain direction of the material, the surface elongation after processing is larger, and the deformation is larger. This scheme makes blank width direction be the material line to, and length direction perpendicular to material line is to, can make the extrusion extension for minimum when processing like this, can effectively reduce the deformation.
3. Adopt two big faces of planing processing positive and negative to replace traditional dish milling cutter mode of milling, utilize the idle stroke of the reciprocal in-process of planing processing, the effectual cutting heat that gives off, the effectual deformation of avoiding cutting heat to arouse, size precision is good, the simple structure of planer and planer tool moreover, the adjustment of planer and the sharpening of planer tool are more convenient, and planing processing is with low costs.
4. The lateral pressing mode and the pressing plate pressing mode are respectively used in the planing processing and the numerical control milling, so that the problem that the surface of a part is arched due to part deflection deformation caused by the traditional vice clamping mode is solved.
5. The rectangular boss and the special-shaped hole are milled in a numerical control mode, cutting force is reduced by reducing cutting width, increasing feeding speed and increasing rotating speed, heat is taken away quickly by cutting chips, thermal deformation of parts is greatly reduced, deformation is effectively controlled, and dimensional accuracy and surface quality are high.
6. And (3) carrying out numerical control milling on the outline, and reserving 0.15mm after three cutters are processed in the depth direction to ensure that the workpiece and the blank are kept connected. The part can be processed in a contour mode through one-time clamping, the rigidity and the stability are good in the whole processing process, the production efficiency is high, and the problems of part deformation and poor surface quality caused by clamping of a vice, dismounting and replacing of a pressing plate and the like are solved.
7. The linear cutting reverse side rectangular through groove is adopted to replace the traditional milling mode, the defects of poor rigidity and unstable size precision caused by clamping and milling of the traditional vice can be overcome, the operation is convenient, the processing stress is small, and the size precision and the surface quality can be well guaranteed.
Claims (9)
1. A sheet part machining method is characterized in that: and cutting the blanking parison along the length direction by a line, planing the front and the back of the parison along the line cutting material lines, and penetrating the through groove on the back of the line cutting process.
2. The thin plate part processing method as claimed in claim 1, wherein: the method comprises the following steps:
feeding: cutting the blank into a parison in a linear cutting mode, wherein the width direction of the parison is the material grain direction;
cutting: milling the side surface of the blank with the accuracy of straightness less than 0.5 mm;
③ cutting the noodles: planing the front surface and the back surface of the parison along the length direction of the parison;
cutting: milling and forming the blank with the accuracy of straightness less than 0.05 mm;
wire cutting: the reverse side of the wire cutting process penetrates through the through groove.
3. The thin plate part processing method as claimed in claim 1, wherein: the thickness of the parison is less than 10mm, and the length and the width of the parison are both greater than 50 mm.
4. The thin plate part processing method as claimed in claim 1, wherein: the parison is an aluminum alloy rolled plate.
5. The thin plate part processing method as claimed in claim 2, wherein: and in the second step, milling by using an end mill with the diameter of phi 6.
6. The thin plate part processing method as claimed in claim 2, wherein: in the third step, the planing direction is perpendicular to the material grain direction.
7. The thin plate part processing method as claimed in claim 2, wherein: in the third step, the planing planeness is 0.03 mm-0.07 mm.
8. The thin plate part processing method as claimed in claim 2, wherein: in the fourth step, the structures of the boss and the hole are milled firstly, and then the outline structure is milled.
9. The thin plate part processing method as claimed in claim 2, wherein: in the second step and the fourth step, the parison is fixed in a lateral compression mode; and in the third step, the parison is fixed by adopting a pressing plate pressing mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086653.8A CN112191963A (en) | 2020-10-12 | 2020-10-12 | Sheet part machining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011086653.8A CN112191963A (en) | 2020-10-12 | 2020-10-12 | Sheet part machining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112191963A true CN112191963A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011086653.8A Pending CN112191963A (en) | 2020-10-12 | 2020-10-12 | Sheet part machining method |
Country Status (1)
| Country | Link |
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| CN (1) | CN112191963A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975013A (en) * | 2021-03-22 | 2021-06-18 | 贵州航天电子科技有限公司 | Machining method for case panel |
| CN113664468A (en) * | 2021-08-19 | 2021-11-19 | 安徽江南机械有限责任公司 | Method for manufacturing rapid sample piece of automobile limiting arm |
| CN114042973A (en) * | 2021-11-23 | 2022-02-15 | 贵州航天电子科技有限公司 | Machining method for sheet boss part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975013A (en) * | 2021-03-22 | 2021-06-18 | 贵州航天电子科技有限公司 | Machining method for case panel |
| CN112975013B (en) * | 2021-03-22 | 2022-02-11 | 贵州航天电子科技有限公司 | Machining method for case panel |
| CN113664468A (en) * | 2021-08-19 | 2021-11-19 | 安徽江南机械有限责任公司 | Method for manufacturing rapid sample piece of automobile limiting arm |
| CN114042973A (en) * | 2021-11-23 | 2022-02-15 | 贵州航天电子科技有限公司 | Machining method for sheet boss part |
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