CN105665526A - Structure-improved necking die - Google Patents
Structure-improved necking die Download PDFInfo
- Publication number
- CN105665526A CN105665526A CN201410659018.2A CN201410659018A CN105665526A CN 105665526 A CN105665526 A CN 105665526A CN 201410659018 A CN201410659018 A CN 201410659018A CN 105665526 A CN105665526 A CN 105665526A
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- workpiece
- die
- mould
- sizing zone
- hole
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Abstract
The invention provides a structure-improved necking die which is composed of a die core and a die frame. The die core is sleeved with the die frame. A guide hole in the inlet end of the die core is a horn mouth with the cone angle being 20 degrees. The end face of the horn mouth is in fillet transition. The width of a sizing zone is 2.5-3 mm, and the rear end of the sizing zone is in a reverse horn mouth shape with the length being 7-10 mm. A hole is directly formed in the rear end of the die frame. The diameter of the hole is 1.6-2.5 mm larger than that of the sizing zone. Since the front portion and the rear portion of the sizing zone are in smooth transition, a workpiece can be protected against scratches on the front portion and the rear portion of the sizing zone when going in or out of the sizing zone. After the width of the sizing zone is necked, resistance during necking and withdrawing is reduced, and the phenomena that a movable end gets stuck, the workpiece brings the die core out when withdrawn and the die core falls off during necking are avoided; as a bush at the tail of the die frame is omitted, the diameter of the hole is larger than that of the sizing zone, contact between the workpiece and the tail of the die frame can be avoided, the resistance to the workpiece during feeding and withdrawing is reduced, the workpiece is protected against scratches, and the die core is prevented from being taken out by the workpiece.
Description
Technical field
The invention belongs to undergauge mould.
Background technology
Existing undergauge mould, as shown in Figure 1, comprises mould core 2, mould bases 1, and mould core 2 is enclosed within mould bases 1, and after mould core, tail has a high hardness alloy steel sleeve 3, and the upstream end of mould core is 201 straight holes, end face chamfering, easy scratch workpiece surface; Calibrating strap 202 width wide (width L is 4-6 millimeter), when causing undergauge, resistance is relatively big, the situation that when workpiece that hardness is higher is existed undergauge, movable end is stuck, and when workpiece exits, easily takes mould bases out of by counter for mould core, causes mould core to come off; Fall 45° angle at calibrating strap 202 rear portion, easy scratch workpiece when workpiece exits; The diameter of bore of high hardness alloy steel sleeve 3 0.3mm bigger than the diameter of calibrating strap 20, but do not have the effect of aligning workpiece, easy scratch workpiece on the contrary.
Summary of the invention
In order to improve workpiece surface quality, reducing undergauge resistance, the present invention proposes the undergauge mould of a kind of modified node method.
The technical scheme of the present invention is: the undergauge mould of a kind of modified node method, is made up of mould core, mould bases, and mould core is enclosed within mould bases, it is characterised in that: the upstream end guiding hole of mould core is cone angle is the hydraucone of 20 °, and the end face of hydraucone adopts round-corner transition; The width of calibrating strap is 2.5-3 millimeter; Calibrating strap rear end employing length is the anti-hydraucone shape of 7-10 millimeter; The rear end of mould bases directly has hole, the big 1.6-2.5 millimeter of the diameter of the diameter ratio calibrating strap in hole.
Useful effect: in the present invention, owing to before and after calibrating strap, transition is mild, it is possible to is scraped off before and after calibrating strap when avoiding workpiece to pass in and out; After calibrating strap reduced width, reduce undergauge and resistance when exiting, the phenomenon that when avoiding undergauge occur, movable end blocks and mould core ribbon gone out, comes off when workpiece exits; Owing to afterbody cancels lining, aperture is greater than calibrating strap, and workpiece can be avoided contact with mould bases afterbody, and resistance during reduction workpiece turnover, prevents workpiece from scraping and injure mould core and taken out of by workpiece.
Accompanying drawing explanation
Fig. 1 is the structure iron of existing undergauge mould.
Fig. 2 is the structure iron of the present invention.
Embodiment
The undergauge mould of a kind of modified node method as shown in Figure 2, is made up of mould core 5, mould bases 4, and mould core 5 is enclosed within mould bases 4, and the upstream end guiding hole 501 of mould core is the hydraucone that cone angle A is 20 °, and the end face of hydraucone adopts round-corner transition;The width L1 of calibrating strap 502 is 2.5-3 millimeter; Calibrating strap rear end 503 adopts length to be the anti-hydraucone shape (cone angle is 10-15 °) of 7-10 millimeter; The rear end of mould bases 4 directly has hole 401, the big 1.6-2.5 millimeter of the diameter of the diameter ratio calibrating strap 502 in hole 401.
Claims (2)
1. a undergauge mould for modified node method, is made up of mould core, mould bases, and mould core is enclosed within mould bases, it is characterised in that: the upstream end guiding hole of mould core is cone angle is the hydraucone of 20 °, and the end face of hydraucone adopts round-corner transition; The width of calibrating strap is 2.5-3 millimeter; Calibrating strap rear end employing length is the anti-hydraucone shape of 7-10 millimeter; The rear end of mould bases directly has hole, the big 1.6-2.5 millimeter of the diameter of the diameter ratio calibrating strap in hole.
2. the undergauge mould of a kind of modified node method according to claim 1, it is characterised in that: the cone angle of anti-hydraucone shape is 10-15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410659018.2A CN105665526A (en) | 2014-11-19 | 2014-11-19 | Structure-improved necking die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410659018.2A CN105665526A (en) | 2014-11-19 | 2014-11-19 | Structure-improved necking die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105665526A true CN105665526A (en) | 2016-06-15 |
Family
ID=56944756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410659018.2A Pending CN105665526A (en) | 2014-11-19 | 2014-11-19 | Structure-improved necking die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105665526A (en) |
-
2014
- 2014-11-19 CN CN201410659018.2A patent/CN105665526A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160615 |
|
| WD01 | Invention patent application deemed withdrawn after publication |