CN112775271B - Technological method for punching and making grooves by using sheet metal part rubber - Google Patents
Technological method for punching and making grooves by using sheet metal part rubber Download PDFInfo
- Publication number
- CN112775271B CN112775271B CN202011552144.XA CN202011552144A CN112775271B CN 112775271 B CN112775271 B CN 112775271B CN 202011552144 A CN202011552144 A CN 202011552144A CN 112775271 B CN112775271 B CN 112775271B
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- Prior art keywords
- punching
- rubber
- sheet metal
- part blank
- grooves
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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
- 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
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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
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
-
- 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
- B21D28/34—Perforating tools; Die holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
Abstract
The invention discloses a process method for punching and making a groove by using a sheet metal part rubber. S1, designing a female die according to a sheet metal part structure, and manufacturing punching holes and/or punching grooves on the female die and corresponding positions of holes and/or grooves of the sheet metal part; s2, placing the part blank in a female die, attaching a rubber layer on the part blank, and arranging rubber bulges on the attached surfaces of the rubber layer and the part blank, wherein the shape and the position of the rubber bulges correspond to the punching holes and/or the punching grooves; s3, applying pressure to the rubber layer to perform sheet metal forming, and enabling the rubber bulge to move towards the punching and/or notching direction on the female die to separate the part blank along the punching and/or notching edge. The invention has the characteristics of convenient operation, cost saving and high quality of parts.
Description
Technical Field
The invention belongs to the technical field of sheet metal forming, and relates to a process method for punching and making a groove by using a sheet metal part rubber.
Background
In order to obtain better performance and stronger maneuvering, the aircraft needs to be greatly lightened, so that the sheet metal parts occupy great proportion in the aircraft manufacturing and are spread on all parts of the aircraft. It is counted that sheet metal parts of the second generation machine and the third generation machine account for about 50% of the number of aircraft parts. The sheet metal part is provided with more holes or grooves, so that the assembly of finished products, cables and guide pipes of an airplane can be ensured while the weight is reduced.
In the case of machining holes and grooves in sheet metal parts, the holes and grooves are usually drilled after the formation of the parts, and the holes and grooves are usually assisted by using equipment, a template, a jig, or the like. Because the part is punched and grooved after forming is finished, the part can also generate certain deformation in the processes of punching and grooving, and the quality of the part is reduced. The use of equipment, templates or drilling jigs and the like increases the production cost, and simultaneously increases the processing procedures, thereby reducing the production efficiency. Particularly, when forming holes and grooves in a special-shaped surface or special-shaped holes and grooves in a plane, the machining is very difficult.
Disclosure of Invention
The purpose of the invention is that: provides a process method for punching and making grooves by using a sheet metal part rubber. The invention has the characteristics of convenient operation, cost saving and high quality of parts.
The technical scheme of the invention is as follows: a process method for punching and making a groove by using a sheet metal part rubber comprises the following steps:
s1, designing a female die according to a sheet metal part structure, and manufacturing punching holes and/or punching grooves on the female die and corresponding positions of holes and/or grooves of the sheet metal part;
s2, placing the part blank in a female die, attaching a rubber layer on the part blank, and arranging rubber bulges on the attached surfaces of the rubber layer and the part blank, wherein the shape and the position of the rubber bulges correspond to the punching holes and/or the punching grooves;
s3, applying pressure to the rubber layer to perform sheet metal forming, and enabling the rubber bulge to move towards the punching and/or notching direction on the female die to separate the part blank along the punching and/or notching edge.
In the step S2, the shore hardness a of the rubber protrusion is 60-90 degrees.
In the step S2, the thickness of the rubber bulge is 15-30 mm.
In the step S2, the thickness of the part blank is less than or equal to 1.5mm.
In the step S2, the blank of the sheet metal part is a material which is not quenched.
In the step S2 of the foregoing process method for punching and grooving the sheet metal part by using a rubber, the part blank is placed in front of the female die, and burrs of the part blank are removed and polished to be smooth.
In the step S3, the pressure applied to the rubber layer is 15-30 MPa.
In the step S3, the device for applying pressure to the rubber layer is hydraulic device.
The invention has the advantages that: the process method for punching and grooving the sheet metal part by using the rubber is convenient to operate and high in efficiency, and the rubber acts on the part blank, so that the surface quality of the part is not affected. The invention is suitable for processing holes and grooves on special-shaped surfaces or special-shaped holes and grooves on planes, solves the problem of difficult processing of the holes and the grooves, saves complex procedures of punching and groove manufacturing after the part is formed, effectively reduces the production cost, improves the working efficiency and improves the product quality. Compared with the mode of using the male die and the female die to form holes and grooves, the method saves investment of a set of dies, is economical and efficient, and reduces production cost for enterprises. The inventor finds that when the Shore hardness A of the rubber bulge is 60-90 degrees, the thickness of the rubber bulge is 15-30 mm, and/or the punching pressure is 15-30 MPa, the forming quality of the punched hole and/or groove is ideal; however, when the thickness of the part blank exceeds 1.5mm, and/or after the part blank is quenched, the forming quality of the punched holes and/or grooves is poor, even if the holes and/or grooves are difficult to successfully punch, and even further, the punching equipment or the die can be damaged, safety accidents and the like occur. Therefore, when the process of the invention is used for punching holes and/or grooves, blanks with the thickness exceeding 1.5mm are not suitable to be used, and quenching treatment is not suitable to be carried out on the blanks before punching.
The application of the process method provided by the invention realizes quality improvement, cost reduction and efficiency improvement for enterprises, and provides a reference in the field of aerospace sheet metal part manufacturing.
Detailed Description
The following description of the invention and the steps of implementing the invention will be more clearly and fully described in connection with the embodiments, which are shown as only some, but not all, of the embodiments of the invention.
Example 1
A process method for punching and making a groove by using a sheet metal part rubber comprises the following steps:
s1, designing a female die according to a sheet metal part structure, and manufacturing punching holes and/or punching grooves on the female die and corresponding positions of holes and/or grooves of the sheet metal part;
s2, placing the part blank in a female die, attaching a rubber layer on the part blank, and arranging rubber bulges on the attached surfaces of the rubber layer and the part blank, wherein the shape and the position of the rubber bulges correspond to the punching holes and/or the punching grooves;
s3, applying pressure to the rubber layer to perform sheet metal forming, forming a blank pressing edge on the part blank at a position corresponding to the edge of the punched hole and/or the punching groove by the rubber layer, and moving the rubber bulge towards the direction of the punched hole and/or the punching groove to separate the part blank along the edge of the punched hole and/or the punching groove on the female die.
In the step S2, the shore a hardness of the rubber bump is 60-90 degrees. The rubber bulge with the hardness replaces the traditional male die, so that holes and grooves with better quality can be punched, the surface of a sheet metal part cannot be scratched, and the quality of a product is improved.
In the step S2, the thickness of the rubber bulge is 15-30 mm. The arrangement of the rubber bulge is not too high, the adhesion degree of the rubber layer and the surface of the part blank is affected by the too high arrangement, and meanwhile, the fatigue damage caused by overstretching of the pressing edge around the rubber bulge during punching is also caused, so that the service life of the rubber is affected; too high deformation of the rubber bulge in the punching process can influence the quality and precision of the punched hole/groove; the rubber bulge is not too low, and the shearing deformation of the part blank at the edge of the punching hole and/or the punching groove required during punching cannot be achieved if the rubber bulge is too low, so that the punching hole and/or the punching groove fails.
In the step S2, the thickness of the part blank is less than or equal to 1.5mm.
In step S2, the part blank is a material that has not been quenched.
In the step S2, the part blank is placed in front of the female die, burrs of the part blank are removed, and the part blank is polished to be smooth. Deburring before stamping, polishing and smoothing are carried out, so that defects such as stress concentration of burrs in the stamping process are avoided, the forming effect is influenced, and burrs are prevented from scratching the surface of the die.
In the step S3, the pressure applied to the rubber layer is 15 to 30MPa.
In the aforementioned step S3, the device for applying pressure to the rubber layer is a hydraulic device.
Example 2
A process method for punching and making a groove by using a sheet metal part rubber comprises the following implementation processes:
(1) Designing and manufacturing a part forming die, and manufacturing punching holes and punching grooves at positions on the die corresponding to holes and grooves of the part;
(2) Clamping the die on hydraulic equipment;
(3) The burrs of the raw materials (part blanks) are processed cleanly, and the edges are polished smoothly and then are placed on a die;
(4) Placing a rubber at the position of punching and notching of the die;
(5) Starting hydraulic equipment and pressing;
(6) Closing the hydraulic equipment after the pressing is finished, and taking down the rubber and the parts;
(7) And removing burrs of the part holes and grooves, polishing the parts to be smooth, and then delivering the parts for inspection.
The process method is convenient to operate, high in working efficiency and stable in quality of the sheet metal parts for punching and grooving, and can be completed by only one die. The process method omits the cost of manufacturing special punching and grooving dies, omits complicated processes of punching and grooving after the part is formed, effectively reduces the production cost, improves the working efficiency and improves the product quality.
Claims (3)
1. A process method for punching and making a groove by using a sheet metal part rubber is characterized by comprising the following steps:
s1, designing a female die according to a sheet metal part structure, and manufacturing punching holes and/or punching grooves on the female die and corresponding positions of holes and/or grooves of the sheet metal part;
s2, placing the part blank in a female die, attaching a rubber layer on the part blank, and arranging rubber bulges on the attached surfaces of the rubber layer and the part blank, wherein the shape and the position of the rubber bulges correspond to the punching holes and/or the punching grooves;
s3, applying pressure to the rubber layer to perform sheet metal forming, and enabling the rubber bulge to move towards the punching and/or notching direction on the female die to separate the part blank along the punching and/or notching edge;
in the step S2, the Shore hardness A of the rubber bulge is 60-90 degrees;
in the step S2, the thickness of the rubber bulge is 15-30 mm;
in the step S2, the thickness of the part blank is less than or equal to 1.5mm;
in the step S2, the part blank is a material which is not quenched;
in step S3, the pressure applied to the rubber layer is 15-30 MPa.
2. The process for punching and grooving sheet metal parts by rubber according to claim 1, wherein in step S2, the part blank is placed before the die, burrs of the part blank are removed, and the part blank is polished to be smooth.
3. The process for punching and grooving sheet metal parts by rubber according to claim 1, wherein in step S3, the device for applying pressure to the rubber layer is a hydraulic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011552144.XA CN112775271B (en) | 2020-12-24 | 2020-12-24 | Technological method for punching and making grooves by using sheet metal part rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011552144.XA CN112775271B (en) | 2020-12-24 | 2020-12-24 | Technological method for punching and making grooves by using sheet metal part rubber |
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| Publication Number | Publication Date |
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| CN112775271A CN112775271A (en) | 2021-05-11 |
| CN112775271B true CN112775271B (en) | 2023-05-23 |
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