CN116571626A - Workpiece stamping method for close connection of conical hole and small-diameter through hole - Google Patents
Workpiece stamping method for close connection of conical hole and small-diameter through hole Download PDFInfo
- Publication number
- CN116571626A CN116571626A CN202310853995.5A CN202310853995A CN116571626A CN 116571626 A CN116571626 A CN 116571626A CN 202310853995 A CN202310853995 A CN 202310853995A CN 116571626 A CN116571626 A CN 116571626A
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- CN
- China
- Prior art keywords
- hole
- stamping
- taper
- diameter
- small
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 8
- 238000003754 machining Methods 0.000 abstract 2
- 238000004080 punching Methods 0.000 description 22
- 238000007781 pre-processing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
Abstract
The invention relates to the field of stamping processes, and discloses a workpiece stamping method for closely adjacent conical holes and small-diameter through holes, which comprises the following steps of: s1, a first stamping die is adopted to singly pre-stamp a conical hole, and the extrusion taper of the conical hole is a first taper; s2, adopting a second stamping die to stamp the conical hole and the small-diameter through hole simultaneously, wherein the extrusion taper of the conical hole is a second taper, and the second taper is larger than the first taper; s3, composite blanking and stamping the outline to obtain the stamping part. Therefore, the workpiece stamping method for the close connection of the conical hole and the small-diameter through hole has the advantages of simultaneous stamping of the conical hole and the through hole, high machining precision, continuous operation and high machining efficiency.
Description
Technical Field
The invention relates to the field of stamping processes, in particular to a workpiece stamping method for a conical hole and a small-diameter through hole.
Background
The stamping is a forming processing method for obtaining a workpiece (stamping part) with a required shape and size by applying external force to plates, strips, pipes, sectional materials and the like by using a press machine and a die to enable the plates, the strips, the pipes, the sectional materials and the like to generate plastic deformation or separation. In practical operation, we found that when there is a taper hole on a workpiece and there is a small diameter through hole next to the taper hole, in the process of one-time stamping forming, since the taper hole extends to the periphery during the stamping forming process, and then the punch of the small diameter through hole next to the taper hole is extruded, the punch size of the small diameter through hole is very small, and when the punch is extruded by the material of the side taper hole, the punch is extremely easy to break, and the damage to the die is caused, so in general, when the taper hole is next to the workpiece of the small diameter through hole, in order to avoid the damage to the die, the taper hole is stamped twice, and the small diameter hole is stamped separately for the second time, although the damage to the small diameter punch is avoided, the new problem is brought: it is difficult to ensure accuracy of the relative positions of the tapered hole and the small-diameter hole at the time of the two-time punching, and the production efficiency is lowered by the two-time punching.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a method of stamping a workpiece in which a tapered hole is in close proximity to a small diameter through hole is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is that the method comprises the following steps:
s1, a first stamping die is adopted to singly pre-stamp the conical hole, the extrusion taper of the conical hole is the first taper, the pre-stamping does not completely punch the conical hole, and the deformation depth of the conical hole is reached, so that the material is free from any obstruction when being diffused to the periphery.
S2, adopting a second stamping die to simultaneously stamp the conical hole and the small-diameter through hole, wherein the extrusion taper of the conical hole is a second taper, and the second taper is larger than the first taper.
S3, composite blanking and stamping the outline to obtain the stamping part.
Compared with the prior art, the invention has the following technical effects:
according to the scheme, the taper hole is pre-punched, so that most processes of outward expansion extrusion of materials are finished in the taper hole forming process in advance, then on the basis of the taper hole formed by pre-punching, the finished taper hole and the small-diameter through hole are obtained through one-time punching, the problem that the punch head of the small-diameter through hole is extruded by deformation of the materials caused by direct punching of the taper hole, the punch head is broken is solved, the taper hole and the small-diameter through hole are simultaneously punched by adopting the second punching die, and the taper hole and the small-diameter through hole are simultaneously punched, so that the problem of relative positional relation deviation caused by fractional punching is avoided.
On the basis of the technical scheme, the invention can be improved as follows.
Preferably, the first stamping die and the second stamping die are fixedly connected together, the first stamping die corresponds to the first processing station, the second stamping die corresponds to the second processing station, and the continuous plate is intermittently fed along with the stamping action, so that continuous stamping work is realized.
The beneficial effect of adopting above-mentioned further scheme is, in the punching press in-process, has realized the punching press to two punching press stations, has realized the pre-punching press of bell mouth in first processing position, has realized the shaping punching press of bell mouth and minor diameter through-hole in second processing position.
Preferably, before the step S1, the method further comprises the step of S0, punching a positioning hole;
preferably, the positioning hole is obtained by stamping a positioning pin punch, and the positioning pin punch is an eccentric punch.
Preferably, step S3 is completed in one step in combination with step S2.
Preferably, in step S3, the stamping profile is reverse stamped, i.e. stamped in a direction opposite to the stamping direction of the second stamping die in step S2.
The technical scheme has the advantages that in the processing process, the front stamping and the back stamping are available, and the internal stress of the stamping part can be reduced.
Drawings
FIG. 1 is a schematic view of the structure of a workpiece with a tapered hole in close proximity to a small diameter through hole in accordance with the present invention;
FIG. 2 is a schematic diagram illustrating the steps of the stamping process;
fig. 3 is an enlarged view at a in fig. 2.
In the drawings, the list of component names indicated by the respective reference numerals is as follows: 1. a tapered bore; 2. a through hole; 10. a pre-processing station; 20. a first processing station; 30. and a second processing station.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Referring to fig. 1, the workpiece to be machined is a circular ring, a conical large hole is formed in the middle, four countersunk screw holes, namely conical holes 1 are formed in the periphery, and one conical hole 1 is closely adjacent to a through hole 2 with a smaller diameter.
Fig. 2 is a schematic processing diagram of each step of the present stamping method, and the stamping method of the workpiece is as follows:
the continuous sheet material enters the processing position of the punching machine,
s0, stamping a positioning hole, through holes of four screw holes and a central large round hole from top to bottom by adopting a third stamping die, wherein the pre-processing position 10 is shown in FIG. 2; the third stamping die comprises an eccentric stamping head, namely the positioning hole is an eccentric oblong hole, as shown in fig. 3, so that the positioning pin on the stamping machine can penetrate conveniently, the positioning pin is cylindrical, the top is conical, and the positioning hole is an eccentric oblong hole so that the positioning pin can penetrate conveniently.
S1, lifting a punching machine, continuously feeding a plate, fixing the position of the plate by matching a positioning hole with a positioning pin, moving the plate in the original pre-processing position 10 to a first processing position 20, and pre-punching a conical hole from bottom to top by adopting a first punching die, wherein the extrusion taper of the conical hole is 85 degrees;
s2, lifting the punching machine, continuously feeding the plate, fixing the position of the plate by matching the positioning hole with the positioning pin, moving the plate in the original first processing position 20 to the second processing position 30, and punching the tapered hole and the small-diameter through hole from bottom to top by adopting a second punching die, wherein the extrusion taper of the tapered hole is 89 degrees, namely the second taper is larger than the first taper, so that the tapered hole reaches the design taper, and simultaneously punching the small-diameter through hole beside the tapered hole, and simultaneously punching the outline to obtain the stamping part. As shown in the second processing station 30 of fig. 2.
In step S2, if the stamping contour is stamped from top to bottom, the internal stress of the stamping part can be reduced, and the effect is better.
The first stamping die, the second stamping die and the third stamping die are fixedly connected together, the first stamping die corresponds to the first processing station 20, the second stamping die corresponds to the second processing station 30, the third stamping die corresponds to the pre-processing station 10, and the continuous plate is intermittently fed along with the stamping action, so that continuous stamping work is realized.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (5)
1. A method of stamping a workpiece having a tapered bore in close proximity to a small diameter through bore, comprising the steps of:
s1, a first stamping die is adopted to singly pre-stamp a conical hole, and the extrusion taper of the conical hole is a first taper;
s2, adopting a second stamping die to stamp a conical hole and a small-diameter through hole simultaneously, wherein the extrusion taper of the conical hole is a second taper, and the second taper is larger than the first taper;
s3, composite blanking and stamping the outline to obtain the stamping part.
2. The method for stamping a workpiece with a conical hole and a small-diameter through hole in close proximity according to claim 1, wherein the first stamping die and the second stamping die are fixedly connected together, the first stamping die corresponds to a first processing station, the second stamping die corresponds to a second processing station, and the continuous sheet material is intermittently fed along with the stamping action to realize continuous stamping.
3. The method of stamping a workpiece with a tapered hole immediately adjacent to a small diameter through hole according to claim 1, further comprising the step of stamping a pilot hole S0 prior to step S1.
4. A method of stamping a workpiece with a tapered hole immediately adjacent to a small diameter through hole as claimed in claim 3, wherein the pilot hole is stamped using a pilot pin punch, which is an eccentric punch.
5. The method of stamping a workpiece with a tapered hole immediately adjacent to a small diameter through hole as recited in claim 1, wherein in step S3, the stamping profile is a reverse stamping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310853995.5A CN116571626A (en) | 2023-07-13 | 2023-07-13 | Workpiece stamping method for close connection of conical hole and small-diameter through hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310853995.5A CN116571626A (en) | 2023-07-13 | 2023-07-13 | Workpiece stamping method for close connection of conical hole and small-diameter through hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116571626A true CN116571626A (en) | 2023-08-11 |
Family
ID=87538152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310853995.5A Pending CN116571626A (en) | 2023-07-13 | 2023-07-13 | Workpiece stamping method for close connection of conical hole and small-diameter through hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116571626A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050188737A1 (en) * | 2003-12-19 | 2005-09-01 | Unova Uk Limited | Relating to the production of small openings in sheet material |
| KR101007635B1 (en) * | 2010-06-18 | 2011-01-12 | 김민정 | Multi-array progressive drawing machine without circular lance |
| CN104759544A (en) * | 2015-04-23 | 2015-07-08 | 太仓安特利精密模具有限公司 | Novel taper hole progressive die for noise reduction sheets made of various types of materials |
| CN208800637U (en) * | 2018-09-25 | 2019-04-30 | 靖江三鹏模具科技股份有限公司 | A kind of quality loop short distance punching die |
| CN208976610U (en) * | 2018-06-14 | 2019-06-14 | 无锡明豪汽车轻量化技术应用有限公司 | A kind of single cylinder multiple punch hydroforming die |
| CN113714394A (en) * | 2021-08-10 | 2021-11-30 | 青岛征和链传动有限公司 | Go up and go out waste material chain link joint blanking device |
| CN114101480A (en) * | 2021-12-02 | 2022-03-01 | 烟台安信精密机械有限公司 | Machining process of flange cover plate |
-
2023
- 2023-07-13 CN CN202310853995.5A patent/CN116571626A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050188737A1 (en) * | 2003-12-19 | 2005-09-01 | Unova Uk Limited | Relating to the production of small openings in sheet material |
| KR101007635B1 (en) * | 2010-06-18 | 2011-01-12 | 김민정 | Multi-array progressive drawing machine without circular lance |
| CN104759544A (en) * | 2015-04-23 | 2015-07-08 | 太仓安特利精密模具有限公司 | Novel taper hole progressive die for noise reduction sheets made of various types of materials |
| CN208976610U (en) * | 2018-06-14 | 2019-06-14 | 无锡明豪汽车轻量化技术应用有限公司 | A kind of single cylinder multiple punch hydroforming die |
| CN208800637U (en) * | 2018-09-25 | 2019-04-30 | 靖江三鹏模具科技股份有限公司 | A kind of quality loop short distance punching die |
| CN113714394A (en) * | 2021-08-10 | 2021-11-30 | 青岛征和链传动有限公司 | Go up and go out waste material chain link joint blanking device |
| CN114101480A (en) * | 2021-12-02 | 2022-03-01 | 烟台安信精密机械有限公司 | Machining process of flange cover plate |
Non-Patent Citations (1)
| Title |
|---|
| 吴若梅: "《金属包装设计与制造》", vol. 1, 上海科学普及出版社, pages: 228 - 230 * |
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