CN1270842C - Impact forming method for hydraulic valve end shield - Google Patents
Impact forming method for hydraulic valve end shield Download PDFInfo
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- CN1270842C CN1270842C CN 200410082735 CN200410082735A CN1270842C CN 1270842 C CN1270842 C CN 1270842C CN 200410082735 CN200410082735 CN 200410082735 CN 200410082735 A CN200410082735 A CN 200410082735A CN 1270842 C CN1270842 C CN 1270842C
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Abstract
The present invention relates to a stamping and molding method for an end cover of a hydraulic valve, which is realized according to the following steps: elementary molding: a convex mould and a concave mould are respectively installed on a working table and a stamping head of a stamping machine, and the stamping machine is started to stamp a plate material into a spherical round cap blank material; reduced molding: a convex mould with a size identical to the size of an inner hole of a workpiece, and a concave mould with a size identical to the size of the outer diameter of the workpiece are respectively installed on the working table and the stamping head of the stamping machine, the stamping machine is started to flatten the spherical top of the spherical round cap blank material and to reduce the lower part of the spherical round cap blank material, the spherical round cap blank material is stamped into the shape of a cylinder, the round cap edge of the spherical round cap blank material is flattened, and a cylindric blank material with an outer edge is formed; shaping: a convex mould with a size and a shape which are identical to the size and the shape of the inner hole of the workpiece, and a concave mould with a size and a shape which are identical to the size and the shape of the outer diameter of the workpiece are respectively installed on the working table and the stamping head of the stamping machine; the stamping machine is started to stamp the cylindric blank material into a workpiece blank material with a shape and a size which conform to requirements; after the edge of the workpiece blank material is cut, the workpiece blank material becomes a workpiece conforming to requirements.
Description
Technical field
The invention belongs to a kind of metal stamping processing method, particularly a kind of impact forming method for hydraulic valve end shield.
Background technology
End shield is parts on the multiple directional control valve, and at present, these parts adopt casting method processing usually.But the end shield that casting method processes is more coarse in appearance, and is also very heavy, because its sidewall is thicker, therefore, consume more metal material.And the end shield that casts out also will just can become the end shield finished product through machining, so the cost of workpiece is than higher.
Metal stamping formed technology is one of basic skills of plastic working, and it is mainly used in processing plate part, so also challenge the material punching press sometimes.Punching production pattern tool and pressing equipment are finished process, so its productivity ratio height is easy and simple to handle, are easy to realize mechanization and automation, steady quality, can obtain other processing methods part that can not or be difficult to make, complex-shaped.And punch process does not need to heat blank, unlike a large amount of cutting metals of machining sample, so it is not only energy-conservation, also saves metal yet, and therefore, punch process is a kind of good product quality, the processing method that production cost is low.Drawing is a kind of in the processing method for stamping, when the working depth of workpiece is big, often need to adopt drawing work to process, draw to process by drawing die and draw equipment and finish process, drawing die mainly contains punch and die, relies on the drawing and moulding of the relative motion realization workpiece of punch and die.When adopting metal drawing and moulding method processing parts, the most important thing is to prevent that workpiece is wrinkling or break, so-called wrinkling, be meant that the blank edge forms tangentially rugged wrinkle in drawing process, but wrinkling is not subject matter in the drawing work, because it always can be by flanging, use bead or adopt way such as positive inside-out redrawing to be eliminated, drawing crack is the subject matter in the drawing work often then.Workpiece bottom comers top slightly is the weakest position of drawn component, the resistance of deformation of bearing when this place is during greater than effective tensile strength of material, drawn component will rupture, therefore, the working depth when workpiece is bigger, when needed blank diameter is very big, often need repeatedly to draw, as shown in Figure 8, shown in, but when repeatedly drawing, because material hardens, add that distortion is comparatively complicated when drawing, the barrel that is blank must could be drawn in die by punch through twice bending, therefore, even adopt the mode of repeatedly drawing, still be difficult to avoid breaking of drawn component, its yield rate is 70～80% only, cause a large amount of wastes, and production efficiency is lower.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes easy the to be wrinkling and drawing crack that existing metal drawing and moulding method exists, the problem that yield rate is low, and the impact forming method for hydraulic valve end shield that a kind of workpiece surface quality is good, yield rate is high is provided.
Impact forming method of the present invention is realized according to the following steps:
1, first one-step forming: punch and die are installed in respectively on the workbench and drift of stamping machine, start stamping machine, with sheet-metal press working globulate circle hat felt material, described spherical circle hat felt material through several times punching press finish, through after the preliminary molding procedure, the height of spherical round hat felt material greater than moulding after the height of workpiece, be H1=1.05～1.2H, in the formula, H1 is the height of spherical circle hat felt material after the several times punching press, and H is the height of workpiece after the moulding;
2, dwindle moulding: will be installed in respectively on the workbench and drift of stamping machine with measure-alike punch of workpiece endoporus and the die identical with the workpiece outside dimension, start stamping machine, the spherical top of sphere circle hat felt material is flattened, and the bottom of sphere dwindled, strike out cylindrical shape, and sphere is justified the circular cap of hat felt material along pressing, form the cylindrical shape blank of band outer, the height of cylindrical shape blank greater than moulding after the height of workpiece, be H2=1.05～1.2H, in the formula, H2 is the height that dwindles cylindrical shape blank after the moulding;
3, typing: punch that will be identical and be installed in respectively on the workbench and drift of stamping machine with workpiece outside dimension, die that shape is identical with hole dimension in the workpiece, shape, start stamping machine, the workpiece blank that the cylindrical shape blank is struck out shape, is of the required size, workpiece blank promptly becomes satisfactory workpiece after cutting edge.
The invention has the advantages that:
1, adopt the method processing cylindrical work pieces of punching press, and in preliminary molding procedure, adopt the mode of repeatedly punching press to process, therefore, the distortion of the interior tissue of metal material is very little, and, after the preliminary molding procedure of process, the bossing of spherical circle hat felt material has surpassed the actual size of workpiece, so, in dwindling moulding and shaping process, the interior tissue distortion of metal material is also very little, thereby in the process of punch process, workpiece can not break, its yield rate reaches 100%, and, the production efficiency height of punch process, the each several part size of workpiece is accurate after the moulding, reliably.
2, adopt repeatedly punch forming during first one-step forming, avoided the workpiece blank surface wrinkling, guarantee that the surface of the work after the moulding is smooth, attractive in appearance.
Description of drawings:
Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are the schematic diagrames of stamping procedure of the present invention
Fig. 6 is the front view after the workpiece machine-shaping of the present invention;
Fig. 7 is the vertical view of Fig. 6;
Fig. 8 is the schematic diagram of drawing operation in the prior art.
The specific embodiment:
1, first one-step forming: punch 3 is installed on the workbench of stamping machine, conical die 1 is installed on the drift of stamping machine, start stamping machine, with sheet-metal press working globulate circle hat felt material 5, described spherical circle hat felt material 5 process several times punching presses are finished, the present invention adopts three punching presses to finish, to avoid the workpiece blank surface wrinkling, when the punching press first time and punching press for the second time, the stroke of stamping machine is all not too big, the excessive then plate of the stroke of stamping machine is wrinkling easily, punching press for the first time becomes more shallow spherical plate 2 with sheet-metal press working, as shown in Figure 1, punching press for the second time will be more shallow spherical plate 2 strike out darker spherical plate 4, as shown in Figure 2, punching press for the third time can will be darker spherical plate 4 strike out spherical circle hat felt material 5, as shown in Figure 3, the first half of spherical circle hat felt material 5 is spherical, the latter half is the circular cap edge, the height of spherical circle hat felt material 5 greater than moulding after the height of workpiece 12, i.e. H1=1.05～1.2H is in the formula, H1 is the height of spherical circle hat felt material 5 after the punching press for the third time, and H is the height of workpiece 12 after the moulding;
2, dwindle moulding: will be installed on the workbench of stamping machine with the measure-alike punch 8 of workpiece endoporus, the die 6 identical with the workpiece outside dimension is installed on the drift of stamping machine, start stamping machine, the spherical top of sphere circle hat felt material 5 the first half is flattened, and the bottom of sphere dwindled, strike out cylindrical shape, the diameter at cylinder place is identical with diameter of work after the moulding, as shown in Figure 4, and with the circular cap of sphere circle hat felt material 5 the latter halfs along pressing, form the cylindrical shape blank 7 of band outer, the height of the workpiece 12 of the height of cylindrical shape blank 7 after greater than moulding, be H2=1.05～1.2H, in the formula, H2 is the height that dwindles cylindrical shape blank 7 after the moulding;
3, typing: will be installed on the workbench of stamping machine with hole dimension, the identical punch 11 of shape in the workpiece, to be installed on the drift of stamping machine with workpiece outside dimension, the identical die 9 of shape, start stamping machine, the height of cylindrical shape blank 7 is reduced, with the workpiece blank 10 that cylindrical shape blank 7 strikes out shape, is of the required size, as shown in Figure 5, workpiece blank 10 is after cutting edge, promptly become satisfactory workpiece 12, as shown in Figure 6 and Figure 7.
Above-mentioned said punch also can be installed on the drift of stamping machine, and die is installed on the workbench of stamping machine, and its punching press effect is identical.
Claims (1)
1, a kind of impact forming method for hydraulic valve end shield is characterized in that, it is realized according to the following steps:
(1) first one-step forming: punch and die are installed in respectively on the workbench and drift of stamping machine, start stamping machine, with sheet-metal press working globulate circle hat felt material, described spherical circle hat felt material through several times punching press finish, through after the preliminary molding procedure, the height of spherical round hat felt material greater than moulding after the height of workpiece, be H1=1.05～1.2H, in the formula, H1 is the height of spherical circle hat felt material after the several times punching press, and H is the height of workpiece after the moulding;
(2) dwindle moulding: will be installed in respectively on the workbench and drift of stamping machine with measure-alike punch of workpiece endoporus and the die identical with the workpiece outside dimension, the spherical top of sphere circle hat felt material is flattened, and the bottom of sphere dwindled, strike out cylindrical shape, and sphere is justified the circular cap of hat felt material along pressing, form the cylindrical shape blank of band outer, the height of cylindrical shape blank greater than moulding after the height of workpiece, be H2=1.05～1.2H, in the formula, H2 is the height that dwindles cylindrical shape blank after the moulding;
(3) typing: punch that will be identical and be installed in respectively on the workbench and drift of stamping machine with workpiece outside dimension, die that shape is identical with hole dimension in the workpiece, shape, start stamping machine, the workpiece blank that the cylindrical shape blank is struck out shape, is of the required size, workpiece blank promptly becomes satisfactory workpiece after cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410082735 CN1270842C (en) | 2004-11-02 | 2004-11-02 | Impact forming method for hydraulic valve end shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410082735 CN1270842C (en) | 2004-11-02 | 2004-11-02 | Impact forming method for hydraulic valve end shield |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603023A CN1603023A (en) | 2005-04-06 |
| CN1270842C true CN1270842C (en) | 2006-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410082735 Expired - Fee Related CN1270842C (en) | 2004-11-02 | 2004-11-02 | Impact forming method for hydraulic valve end shield |
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| CN (1) | CN1270842C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448598C (en) * | 2007-02-11 | 2009-01-07 | 陈勇 | Stretching process of clutch casing |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767154B (en) * | 2010-03-26 | 2011-10-05 | 北京三兴汽车有限公司 | Stepped cylindrical component die for medium plate |
| CN111822635B (en) * | 2020-07-08 | 2022-03-04 | 贵州航天新力科技有限公司 | Progressive forming process and forming equipment for U-shaped forged piece |
| CN111822638B (en) * | 2020-07-08 | 2022-06-03 | 贵州航天新力科技有限公司 | Forging piece forming die and assembling method thereof |
| CN114226538B (en) * | 2021-12-27 | 2024-04-26 | 江苏浩峰汽车附件有限公司 | Air bag guide sleeve and forming method thereof |
-
2004
- 2004-11-02 CN CN 200410082735 patent/CN1270842C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100448598C (en) * | 2007-02-11 | 2009-01-07 | 陈勇 | Stretching process of clutch casing |
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| CN1603023A (en) | 2005-04-06 |
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