CN203245205U - Hot extrusion reaming head - Google Patents
Hot extrusion reaming head Download PDFInfo
- Publication number
- CN203245205U CN203245205U CN 201320292729 CN201320292729U CN203245205U CN 203245205 U CN203245205 U CN 203245205U CN 201320292729 CN201320292729 CN 201320292729 CN 201320292729 U CN201320292729 U CN 201320292729U CN 203245205 U CN203245205 U CN 203245205U
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- reaming
- frustum
- diameter
- hot extrusion
- head
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Abstract
The utility model relates to a reaming head for a ferrous metal hot extrusion process. The hot extrusion reaming head comprises a shearing column, wherein the lower end of the shearing column is connected with a reaming conical platform; the diameter of the reaming conical platform is gradually decreased from top to bottom; the diameter of the upper end of the reaming conical platform is the same as that of the shearing column; the lower end of the reaming conical platform is connected with a guide conical platform; the diameter of the guide conical platform is gradually decreased from top to lower; the diameter of the upper end of the guide conical platform is the same as that of the lower end of the reaming conical platform and that of a pre-drilling hole of a blank. When the hot extrusion reaming head is placed, the reaming head can quick achieve centering and accurately reach a proper position, and enables the wall thickness of a reaming blank to be uniform.
Description
Technical field
The utility model belongs to ferrous metal extrusion process field, be specifically related to a kind of in extrusion process the application tool and mould of reaming operation.
Background technology
In the ferrous metal extrusion process, the reaming operation is the important step in the production process, and its objective is as extruder provides the extrusion billet with suitable endoporus.The reaming quality of the blank especially dimensional accuracy of reaming (the wall thickness uniformity that mainly refers to the reaming blank) affects the quality of extruded product.
In the prior art, two kinds of techniques are arranged in the reaming operation, a kind of is that reaming bar and reaming head connect together, and the reaming head is also referred to as dead end, has the problem of dismounting inconvenience, is mainly used in little staving press; A kind of is that reaming bar and reaming head are that separately the reaming head is also referred to as head alive, and advantage is easy accessibility, can recycle, and particularly is suitable for very much large-scale staving press.But the disadvantage of the head of living is that the reaming head is in free state in put procedure, the centering difficulty, for this reason, in the bottom design of reaming head lead, the diameter of the diameter of lead and blank prebored hole is complementary, but excesssive gap, to askew, the gap is too small easily, easily plug-hole, do not go under the reaming head, because the skew problem of reaming head, often cause the inner eccentric holes after the reaming, have a strong impact on the dimensional accuracy of extruded product.
The utility model content
The technical problems to be solved in the utility model provides a kind of reaming head of new structure, makes it in put procedure, and the reaming head is centering rapidly, accurately puts in place, makes reaming blank wall thickness even.
The utility model hot extrusion reaming head, comprise the shearing post, the lower end of described shearing post connects the reaming frustum, described reaming frustum from top to bottom diameter dwindles gradually, the upper end diameter of reaming frustum is identical with the diameter of shearing post, the lower end of described reaming frustum connects the guiding frustum, and the diameter of described guiding frustum dwindles from top to bottom gradually, and the upper end diameter of guiding frustum is identical and identical with the prebored hole diameter of blank with the lower end diameter of reaming frustum.
The utility model hot extrusion reaming head, the cone angle of wherein said guiding frustum is 6～10 °, the height of guiding frustum is 3～5 times of guiding frustum upper end diameter.
The utility model hot extrusion reaming head, wherein said reaming frustum is structure as a whole with the guiding frustum.
The utility model hot extrusion reaming difference from prior art is that the utility model hot extrusion reaming head changes lead into frustum, the large footpath, upper end of design frustum is identical with blank prebored hole diameter, and the lower end diameter of guiding frustum is less than blank prebored hole diameter, like this when placing reaming, guiding frustum small end is easy to enter in the prebored hole, enter large end and the prebored hole tight fit of last guiding frustum, the reaming head has just aligned the center of prebored hole accurately, make the ensuing reaming can be eccentric, reaming blank wall thickness be even.
Below in conjunction with accompanying drawing hot extrusion reaming head of the present utility model is described further.
Description of drawings
Fig. 1 is the structural representation of the utility model hot extrusion reaming head.
The specific embodiment
As shown in Figure 1, present embodiment hot extrusion reaming head comprises shears post 1, the lower end of shearing post connects reaming frustum 2, reaming frustum 2 from top to bottom diameter dwindles gradually, the upper end diameter of reaming frustum is identical with the diameter of shearing post 1, the lower end of reaming frustum 2 connects guiding frustum 3, and present embodiment reaming frustum 2 is structure as a whole with guiding frustum 3.The diameter of guiding frustum 3 dwindles from top to bottom gradually, the upper end diameter of guiding frustum is identical and identical with the prebored hole diameter of blank with the lower end diameter of reaming frustum, the cone angle of guiding frustum 3 is 6～10 °, and the height of guiding frustum 3 is 3～5 times of guiding frustum upper end diameter.
Present embodiment hot extrusion reaming head is in free state in put procedure, the lower end of guiding frustum is introduced into the blank prebored hole, the large end of frustum of leading at last enter in the prebored hole and with the prebored hole tight fit, make and expand the center that head accurately aligns prebored hole, and then promote the reaming head by broaching equipment and move downward and finish the reaming operation.
Above-described embodiment is described preferred embodiment of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (3)
1. hot extrusion reaming head, comprise and shear post (1), the lower end of described shearing post connects reaming frustum (2), described reaming frustum (2) from top to bottom diameter dwindles gradually, the upper end diameter of reaming frustum is identical with the diameter of shearing post (1), it is characterized in that: the lower end of described reaming frustum (2) connects guiding frustum (3), the diameter of described guiding frustum (3) dwindles from top to bottom gradually, and the upper end diameter of guiding frustum (3) is identical and identical with the prebored hole diameter of blank with the lower end diameter of reaming frustum (2).
2. hot extrusion reaming head according to claim 1, it is characterized in that: the cone angle of described guiding frustum (3) is 6～10 °, the height of guiding frustum (3) is 3～5 times of guiding frustum upper end diameter.
3. hot extrusion reaming head according to claim 1 and 2 is characterized in that: described reaming frustum (2) is structure as a whole with guiding frustum (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320292729 CN203245205U (en) | 2013-05-24 | 2013-05-24 | Hot extrusion reaming head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320292729 CN203245205U (en) | 2013-05-24 | 2013-05-24 | Hot extrusion reaming head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203245205U true CN203245205U (en) | 2013-10-23 |
Family
ID=49371669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320292729 Expired - Fee Related CN203245205U (en) | 2013-05-24 | 2013-05-24 | Hot extrusion reaming head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203245205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264062A (en) * | 2013-05-24 | 2013-08-28 | 新兴铸管股份有限公司 | Hot-extrusion reaming head |
-
2013
- 2013-05-24 CN CN 201320292729 patent/CN203245205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264062A (en) * | 2013-05-24 | 2013-08-28 | 新兴铸管股份有限公司 | Hot-extrusion reaming head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20160524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |