CN2717570Y - Mould of caststeel blank for precast ring-shape forging piece - Google Patents
Mould of caststeel blank for precast ring-shape forging piece Download PDFInfo
- Publication number
- CN2717570Y CN2717570Y CN 03206332 CN03206332U CN2717570Y CN 2717570 Y CN2717570 Y CN 2717570Y CN 03206332 CN03206332 CN 03206332 CN 03206332 U CN03206332 U CN 03206332U CN 2717570 Y CN2717570 Y CN 2717570Y
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- China
- Prior art keywords
- forging
- blank
- cast steel
- steel base
- annular
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Abstract
The utility model discloses a mould of cast steel blank of premade annular forged piece, belonging to the technical field of machine forging and casting. The utility model can make the cast billet blank disengage from the lower mould body, the billet of the cast steel body doesn't generate cracks or fissures, an equicrural triangle circular clinohedral is formed at the inner side of the cast billet blank, the equicrural triangle circular clinohedral is used for accurate positioning in the forging clamping fixture to reduce remarkably the production cost of the circular forging. The technical essentials of the utility model are that the inclination angle of mold stripping is enlarged, the height of the steps of the lower mould body is half of the height of the cast billet blank, and the shape and size of the boss of the upper mould body is symmetrical with shape and size of the boss of the cast billet blank.
Description
Technical field the utility model relates to a kind of machinery and forges technical field with casting, and especially relating to a kind of its cross section of making is that the prefabricated component of the annular forging of circle or rectangle is the particular manufacturing craft of cast steel base.
Background technology is big for its bearing load at present, the cross section that special technical requirement is arranged again is its physical dimension and all bigger annular class machine components of weight of circle or rectangle, all being that the forging that open die forging is made is made through operations such as machineds, all is to be earlier to cut or chop blanking with engraving tool after the hot-rolled square steel of 200-300 millimeter is heated to forging temperature with the length of side; Subsequently with this blank post bake and the cake of upsetting, punching; Also reaming after heating for the third time, shaping can be shaped when its forging is the square-section again, can only be preform when its forging is circular cross-section; Be not only the forging that circle and annular size are also big, weight is also bigger for its cross section, must carry out four heating could be shaped by finish-forgings, becomes qualified forging.
In these conventional forging process, its positive one side is arranged, as the metallic fiber good directionality, dense internal organization, mechanical performance will improve greatly; But the one side that its deficiency is also arranged, as: add showing tremendous enthusiasm time manyly, its forging stock scaling loss is many, coal-firedly consumes manyly, and equipment dynamic consumption is many, and labor strength is big, final production cost height.
One side in view of above its deficiency, people are inquiring into the circular material blank with the bigger annular forging piece of casting process elder generation manufactured size always, it is the cast steel base, replace or save part operation in " after square steel is heated to forging temperature; cut or chop blanking; post bake, rammer cake, punching and three heating preforms; four times heating back finish-forging is shaped " operation in the free forging process, use again that " once the technology of heating and forging and molding (circular, square-section can) just can be produced the method for qualified forging with carving.But, can not separate because of its cast steel base and lower mold body of mould in the discussion process are stuck together or the base substrate section of cast steel base on easily crack or the crack forms and scraps.
Summary of the invention task of the present utility model provides a kind of mould of cast steel base of prefabricated annular forging piece, and its structure has can make cast steel base and lower mold body separate, and does not crack or the crack on base substrate simultaneously; Simultaneously also can pinpoint isoceles triangle annular slope body on the mold that constitutes the open die forging finish-forging forming technology that an energy carrying out subsequently on the annular inboard surface of base substrate, the production cost of annular forging piece is reduced significantly.
The technical solution of the utility model is as follows: 1). and the depanning gradient that increases step in the annular housing of lower mold body promptly will be used the depanning draft angle of super large value, and to make the height of this step simultaneously be half of cast steel base height; 2). increase the depanning draft angle of its boss of bottom of upper die body, and make the interior step of annular housing in the depanning draft angle of this boss and height (comprising diameter) and the lower mold body symmetrical.
In this programme, step, its oblique side surface of boss with bigger depanning draft angle can lose when casting the crowded effect of the card of cast steel base, causing this cast steel base freely to shrink promptly separates with lower mold body (comprising upper die body) " slippage " simultaneously, because this cast steel base can free shrink, the internal stress that produces in the base substrate is minimum, does not also just produce crackle or crack.(gradient, highly, diameter) is symmetrical because its shape of step of the boss of upper die body and lower mold body, size in this programme, so on the inner surface of this cast steel base, just must constitute isoceles triangle annular slope body, this isoceles triangle annular slope body can accurately be located on the open die forging mold, only get final product finish forging, utilize this isoceles triangle annular slope body also can on machine for rolling ring, accurately locate, also be that a fire just can be rolled into type with a fire heating.
List ton cost element and technical solutions of the utility model that conventional free forging process forges the annular forging below: earlier prefabricated cast steel base, carry out open die forging (or rolling) finish-forging, the reference table of the ton cost element correspondence comparison of its annular forging again with machine for rolling ring:
| Title | Add showing tremendous enthusiasm time | Fire consumption % | Coal consumption % | Punching material (kg/ spare) | Forge the time (%) | Forging weight/blank is heavy | Workman/per tour | Ton cost (unit) | Remarks (use equipment) |
| Common process | 3-4 | 6 | 100 | 5-7 | 100 | 1/1.85 | 8 | 5085 | Hot rolling square billet+flat-die hammer |
| This programme | 1 | 1 | 30 | Do not have | 50 | 1/1.65 | 6 | 4140 | Cast steel base+flat-die hammer |
| This programme | 1 | 1 | 30 | Do not have | 50 | 1/1.4 | 3 | 3440 | Cast steel base+machine for rolling ring |
The beneficial effects of the utility model are as follows: owing to adopt technique scheme, just having reached its cast steel base can separate with lower mold body (upper die body), has reached simultaneously not crack on the base substrate of its cast steel base or the effect in crack; Simultaneously had an energy pinpoint isoceles triangle annular slope body in the open die forging mold just to make its Forging Technology simplify greatly in base substrate inboard also structure, production cost significantly reduces, and has realized the task of the utility model expection.Its method and structure is all simple.
Description of drawings Fig. 1 is the front view of mould structure of the cast steel base of a kind of prefabricated annular forging piece of the utility model.
Fig. 2 is the vertical view of mould structure of the cast steel base of a kind of prefabricated annular forging piece of the utility model.
The specific embodiment is further described the utility model below in conjunction with accompanying drawing:
In Fig. 1, Fig. 2: the height a that annular cast steel base 1 isoceles triangle annular slope body 2 upper die bodies 3 boss 4 steps 5 lower mold body 6 h are step is the depanning draft angle of step
In the embodiment shown in the figures, be provided with step 5 in the annular housing of lower mold body 6, the height of its step 5 is h, h equals half of height of annular cast steel base 1, the depanning draft angle a of its step 5 is 15 °-78 °, be advisable to adopt a to be 45 °-78 °, preferably adopt 60 °, read the mould draft angle and can cause its cast steel base when casting, to separate with lower mold body and upper die body " slippage " in its cooling contraction process more greatly.Be provided with a boss 4 in the bottom of upper die body 3, the geometry of its boss 4 and size are all symmetrical with its step 5.Because boss 4 is symmetrical with step 5, this cast steel base 1 that constituted an isoceles triangle annular slope body 2 on the inner surface of the annular cast steel base 1 that the annular skewed surface on its step 5 and the boss 4 just makes, just makes location accurately on the open die forging fixture clamping fixture can tube singly forge out qualified annular forging piece apace.
Claims (3)
1. the mould of the cast steel base of a prefabricated annular forging piece, comprise lower mold body (6), be arranged on step (5), the upper die body (3) in the annular housing of lower mold body (6) and be arranged on the boss (4) of the bottom of upper die body (3), it is characterized in that: the depanning draft angle of step (5) is 15 °～78 °; The height of step (5) is half of height of annular cast steel base; The symmetrical configuration of the structure of boss (4) and step (5).
2. the mould of the cast steel base of a kind of prefabricated annular forging piece according to claim 1, it is characterized in that: the depanning draft angle of step (5) is 45 °～78 °.
3. the mould of the cast steel base of a kind of prefabricated annular forging piece according to claim 1, it is characterized in that: the depanning draft angle of step (5) is 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03206332 CN2717570Y (en) | 2003-07-24 | 2003-07-24 | Mould of caststeel blank for precast ring-shape forging piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03206332 CN2717570Y (en) | 2003-07-24 | 2003-07-24 | Mould of caststeel blank for precast ring-shape forging piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2717570Y true CN2717570Y (en) | 2005-08-17 |
Family
ID=34891849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03206332 Expired - Fee Related CN2717570Y (en) | 2003-07-24 | 2003-07-24 | Mould of caststeel blank for precast ring-shape forging piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2717570Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699193A (en) * | 2012-05-30 | 2012-10-03 | 上海锅炉厂有限公司 | Forming die for compression moulding semi-circular pipe and processing method of forming die |
-
2003
- 2003-07-24 CN CN 03206332 patent/CN2717570Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699193A (en) * | 2012-05-30 | 2012-10-03 | 上海锅炉厂有限公司 | Forming die for compression moulding semi-circular pipe and processing method of forming die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |