CN207154775U - Powder metallurgy chain wheel class forming punch tooth-shape structure - Google Patents
Powder metallurgy chain wheel class forming punch tooth-shape structure Download PDFInfo
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- CN207154775U CN207154775U CN201720450991.2U CN201720450991U CN207154775U CN 207154775 U CN207154775 U CN 207154775U CN 201720450991 U CN201720450991 U CN 201720450991U CN 207154775 U CN207154775 U CN 207154775U
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- chain wheel
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Abstract
A kind of powder metallurgy chain wheel class forming punch tooth-shape structure, including drift body, it is characterised in that：Have additional to coordinate with cavity impression at the external diameter gear of the drift body and be easy to ferrous powder granules to drop, avoid the stuck gap of mould, gap is：Tooth top fit clearance is 0.025 ± 0.005mm, and flank profil fit clearance is 0.04 ± 0.005mm, and dedendum gap is 0.04 ± 0.005mm.The utility model is simple and reasonable, forming effect is good, preferably solves the problems, such as that chain wheel-class parts mould in shaping is stuck, reduces the generation that mould is scrapped, reduce the waste in material and man-hour, while improve mould utilization factor and operating efficiency.
Description
Technical field
The utility model belongs to powder metallurgical technology, is related to a kind of mould, and in particular to a kind of powder metallurgy chain wheel
Class forming punch tooth-shape structure.
Background technology
Powder metallurgy be by the use of metal or by the use of metal dust as raw material, it is manufacture metal material, compound by shaping and sintering
And the technology of all kinds product, it is widely used in every field, because powder metallurgy has unique chemical group
Into with machinery, physical property, be that traditional casting method can not obtain, available for manufacture automobile, motorcycle, textile machine,
The various powdered metal parts such as electric tool, hardware ＆ tools, electrical equipment.
Shaping dies be sintered metal product production during key equipment, iron powder used in metallurgy depended on pressure into
Shaped in shape mould, the size of drip molding is the guarantee of finished parts size.Therefore, in the process of blade rotor class part
In, forming punch is the important tool for ensureing product precision.
In the powder metallurgy formation drift design of routine, the fit clearance of forming punch tooth form and former 0.015 ±
0.005, then in chain wheel-class parts, powder particle is easily fallen at its mould fit clearance designed, causes mould stuck,
The waste in material and man-hour is caused, while also reduces operating efficiency.
Through looking into, existing Patent No. CN201620762502.2 Chinese utility model patent《A kind of powder metallurgy water pump
Belt wheel class forming punch structure》, including drift body, it is characterised in that：Formed on the exterior annular face of the drift body
For preventing the stuck straight flange chamfering step of mould.Increase by a straight flange chamfering step on the outside of drift so that ferrous powder granules are direct
Fall at this step, rather than at the fit clearance between mould, reduce the stuck possibility of mould herein.But this shaping punching
Head is shaping for powder metallurgy Water-pump belt wheel class product, it is impossible to be used in powder metallurgy chain wheel class product, it is therefore desirable to into
Shape punch structure is improved, the enabled needs for meeting powder metallurgy chain wheel class product.
The content of the invention
Technical problem to be solved in the utility model be for the above-mentioned state of the art and provide it is a kind of it is rational in infrastructure, into
The good powder metallurgy chain wheel class forming punch tooth-shape structure of shape effect, to solve the problems, such as that sprocket wheel mould in shaping is stuck.
Technical scheme is used by the utility model solves above-mentioned technical problem：A kind of powder metallurgy chain wheel class shaping punching
Head tooth-shape structure, including drift body, it is characterised in that：Have additional at the external diameter gear of the drift body and match somebody with somebody with cavity impression
Conjunction is easy to ferrous powder granules to drop, avoids the stuck gap of mould.
As an improvement, the outer surface of the drift body is divided axially into three sections, wherein leading portion is the tooth with gear structure
Section is taken turns, stage casing is in the cylinder of undergauge, and the junction ring in back segment and stage casing is arranged with expanding arc-shaped step, arc-shaped step
Rear end is provided with an expanding step.
Finally, the fit clearance between the external diameter gear and cavity impression of the gear segment is：Tooth top fit clearance is
0.025 ± 0.005mm, flank profil fit clearance are 0.04 ± 0.005mm, and dedendum gap is 0.04 ± 0.005mm.
Compared with prior art, the utility model has the advantage of：Had additional at the external diameter gear of drift body and the moon
The gap that model cavity coordinates so that ferrous powder granules can smoothly drop, and reduce the stuck possibility of mould herein, reduce mould report
Useless generation.The utility model is simple and reasonable, forming effect is good, preferably solves chain wheel-class parts mould in shaping
The problem of stuck, reduce the waste in material and man-hour, while improve operating efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is Fig. 1 side view；
Fig. 3 is the structural representation of the gear structure with former fit clearance of the utility model embodiment.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing embodiment.
As shown in Figure 1, 2, 3, a kind of powder metallurgy chain wheel class forming punch tooth-shape structure of the present embodiment, including drift sheet
Body 1, the middle part of drift body 1 are provided with axis hole 11, and axis hole 11 is the big shoulder hole of the small back segment of leading portion, in the external diameter of drift body 1
Have additional to coordinate with the die cavity of former 2 at gear 121 and be easy to ferrous powder granules to drop, avoid the stuck gap of mould；Drift body 1
Outer surface is divided axially into three sections, and wherein leading portion is the gear segment 12 with gear structure, and stage casing 13 is in the cylinder of undergauge, back segment
Expanding arc-shaped step 14 is arranged with the junction ring in stage casing 13, the rear end of arc-shaped step 14 is provided with an expanding step
15, the fit clearance between the external diameter gear 121 and the die cavity of former 2 of gear segment 12 is：Tooth top fit clearance a be 0.025 ±
0.005mm, flank profil fit clearance b are 0.04 ± 0.005mm, and dedendum gap c is 0.04 ± 0.005mm, so that iron
Powder particles directly drop, and greatly reduce the stuck possibility of mould herein, reduce generation and material and work that mould is scrapped
When waste, at the same time effectively increase production efficiency.
The utility model is good and easily manufactured through implementing using effect, preferably solves the problems, such as that mould is stuck.Adopt
After the drift gear structure of the present embodiment, during formed product, stuck phenomenon does not occur for mould so that mould utilization factor is significantly
Rise, economic benefit is improved.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as the scope of protection of the utility model.
Claims (3)
1. a kind of powder metallurgy chain wheel class forming punch tooth-shape structure, including drift body, it is characterised in that：The drift body
External diameter gear at have additional to coordinate with cavity impression and be easy to ferrous powder granules to drop, avoid the stuck gap of mould.
2. powder metallurgy chain wheel class forming punch tooth-shape structure according to claim 1, it is characterised in that：The drift sheet
The outer surface of body is divided axially into three sections, and wherein leading portion is the gear segment with gear structure, and stage casing is in the cylinder of undergauge, back segment
Expanding arc-shaped step is arranged with the junction ring in stage casing, the rear end of arc-shaped step is provided with an expanding step.
3. powder metallurgy chain wheel class forming punch tooth-shape structure according to claim 2, it is characterised in that：The gear segment
External diameter gear and cavity impression between fit clearance be：Tooth top fit clearance is 0.025 ± 0.005mm, between flank profil coordinates
Gap is 0.04 ± 0.005mm, and dedendum gap is 0.04 ± 0.005mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720450991.2U CN207154775U (en) | 2017-04-26 | 2017-04-26 | Powder metallurgy chain wheel class forming punch tooth-shape structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720450991.2U CN207154775U (en) | 2017-04-26 | 2017-04-26 | Powder metallurgy chain wheel class forming punch tooth-shape structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207154775U true CN207154775U (en) | 2018-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720450991.2U Active CN207154775U (en) | 2017-04-26 | 2017-04-26 | Powder metallurgy chain wheel class forming punch tooth-shape structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042915A (en) * | 2021-11-22 | 2022-02-15 | 株洲钻石切削刀具股份有限公司 | Forming device and forming method for non-circular hole alloy blade |
-
2017
- 2017-04-26 CN CN201720450991.2U patent/CN207154775U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042915A (en) * | 2021-11-22 | 2022-02-15 | 株洲钻石切削刀具股份有限公司 | Forming device and forming method for non-circular hole alloy blade |
| CN114042915B (en) * | 2021-11-22 | 2024-01-02 | 株洲钻石切削刀具股份有限公司 | Forming device and forming method for non-round hole alloy blade |
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