CN221170283U - Composite part forming locating pin - Google Patents
Composite part forming locating pin Download PDFInfo
- Publication number
- CN221170283U CN221170283U CN202322640869.XU CN202322640869U CN221170283U CN 221170283 U CN221170283 U CN 221170283U CN 202322640869 U CN202322640869 U CN 202322640869U CN 221170283 U CN221170283 U CN 221170283U
- Authority
- CN
- China
- Prior art keywords
- pin
- locating pin
- cap
- composite part
- shape
- 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.)
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Links
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 9
- 238000007747 plating Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 22
- 239000003292 glue Substances 0.000 description 9
- 239000000835 fiber Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Closures For Containers (AREA)
Abstract
The utility model discloses a composite part forming locating pin, which consists of a locating pin shaft and a pin cap, wherein a polytetrafluoroethylene film is plated on the surface of the pin shaft, threaded holes are formed in the end face of the pin cap, planes are arranged on two sides, a prying opening and a sealing groove are formed in the bottom of the pin cap.
Description
Technical Field
The utility model relates to the field of fiber composite part forming equipment, in particular to a composite part forming locating pin.
Background
In the process of molding or gluing the aircraft fiber composite material part, as the fixed pressure pad, the core mold and the dry fiber composite material part need to be positioned by pins on the mold surface, resin and a glue film flow in the curing process of the fiber composite material part, and are influenced by a vacuum state, when the pins and the pin positioning holes are closer to a composite material product, the fit clearance between the pins and the pin positioning holes can be filled by the resin or the glue film, the pins and the pin positioning holes are difficult to be taken out from the positioning holes after the resin or the glue film is cured, the product demoulding time is longer, and the production efficiency is influenced. In view of this situation, it is highly desirable to find a new locating pin to meet the production requirements.
Disclosure of Invention
The utility model aims to provide the special positioning pin which is convenient to pull out pins, has multiple pin pulling modes, can reduce the glue feeding amount of the gap between the positioning hole and the pin and reduce the adhesive force.
In order to achieve the purpose, the utility model adopts the following technical scheme:
A composite part forming locating pin comprises a locating pin shaft and a pin cap, wherein a polytetrafluoroethylene film is plated on the surface of the locating pin shaft, a threaded hole is formed in the upper end face of the pin cap, two planes are arranged on two sides, and a prying opening and a sealing groove are formed in the bottom.
The surface of the positioning pin shaft is plated with a polytetrafluoroethylene film with the thickness of 15-100 mu m.
The pin cap is in a truncated cone shape, the top end surface is provided with a threaded hole, the thread size is consistent with that of the pin puller, two sides are planes, round holes are formed in the planes, the diameter of the holes is 2-5mm, a sealing groove is formed in the bottom, the sealing groove is semicircular or rectangular, meanwhile, a symmetrical notch is formed in the bottom, the notch is in an inverted L shape or in a slope, and the slope inclination angle is 10-15 degrees.
The invention has the beneficial effects that: the pin cap part is provided with the pin pulling holes, the rotary clamping plane, the rotary holes and the prying openings, so that the problem of space limitation of different forming tools can be solved by adopting various pin pulling modes, meanwhile, the sealing groove is arranged at the bottom of the pin cap, the sealing gasket can be increased, the glue feeding amount of the positioning hole and the pin gap can be reduced, the adhesive force can be reduced by plating the polytetrafluoroethylene film on the shaft pin part, and the positioning pin opening difficulty can be reduced.
The application is described in further detail below in conjunction with the drawings of the embodiments.
Drawings
FIG. 1 is a schematic front view of a locating pin
FIG. 2 is a front cross-sectional view of the locating pin
FIG. 3 is a top cross-sectional view of the locating pin
FIG. 4 is a schematic view of locating pin set ramp notch
The numbering in the figures illustrates: 1, positioning a pin shaft; 2, a pin cap; 3, notch; 4, a round hole; 5, a threaded hole; 6, sealing the groove; 7, cutting a plane; and 8, pin shaft plane cutting.
Detailed Description
Referring to fig. 1-4, a composite part forming locating pin comprises a locating pin shaft 1 and a pin cap 2, wherein a polytetrafluoroethylene film is plated on the surface of the locating pin shaft 1, a threaded hole 5 is formed in the upper end surface of the pin cap 2, two sides are plane surfaces, and a prying opening and a sealing groove are formed in the bottom.
The surface of the positioning pin shaft 1 is plated with a polytetrafluoroethylene film with the thickness of 15-100 mu m.
The pin cap 2 is in a truncated cone shape, the top end surface is provided with a threaded hole 5, the thread size is consistent with that of a pin puller, two sides are planes, round holes 4 are formed in the planes, the diameter of the holes is 2-5mm, a sealing groove 6 is formed in the bottom, the sealing groove 6 is semicircular or rectangular, meanwhile, a symmetrical notch 3 is formed in the bottom, the notch 3 is in an inverted L shape or is a slope, and the slope inclination angle is 10-15 degrees.
In this embodiment:
positioning pin 1: the diameter and the length are customized according to the requirement, the diameter is 5 mm-18 mm, the general tolerance is f7 or f9, the polytetrafluoroethylene film is plated on the surface, the thickness of the plated layer is 15 mu m-100 mu m, and the purpose is to reduce the adhesion force between the glue and the pin.
The cross-sectional shape is preferably 1 circular;
The cross-section shape is preferably 2 in a shape of a circular segment, a part of the cross-section shape is cut off, a notch is formed for gas to overflow from the cut-off part when the bolt is used, and the bolt is more convenient to install.
Pin cap 2: the shape is cone frustum, the section is trapezoid, the appearance is in order to reduce the risk of explosion of the vacuum bag caused by the pin cap, the diameter is generally 10 mm-20 mm, and the height is 8 mm-20 mm.
The sealing groove 6 is arranged at the bottom of the truncated cone of the pin cap 2, the cross section of the sealing groove is semicircular or rectangular, the sealing groove 6 is used for placing a sealing rubber gasket when the sealing groove is used, the sealing ring is made of high-temperature-resistant sealing rubber material, the positioning pin is pressed by vacuum bag pressure, the glue flowing into a gap between the pin and the positioning hole is reduced, and the cross section width is generally about 3 mm.
The two sides of the pin cap 2 are flattened, and round holes with the diameter of 3mm are arranged at the flattening positions and are used for a special spanner, an ordinary spanner or pliers to rotate the pin cap so as to separate the pin shaft from the adhesive bonding part.
The top of the pin cap 2 is provided with a threaded hole 5, the size of the threaded hole is generally M3-M8, the threaded hole is arranged according to the diameter of the pin shaft, and the threaded hole is connected with a pin pulling head of a manual impact pin puller and used for pulling pins.
The bottom of the pin cap is provided with a symmetrical notch 3, the notch 3 is in an inverted L shape or a slope, and the slope angle is 10-15 degrees and is used for a matching position when the pin is pulled out by a pry bar.
The using mode is as follows: when the composite material part or the core mold is positioned, a product to be positioned is placed, a special pin is inserted into the positioning hole, if the product is not glued from the bottom of the pin cap 2, a sealing ring can not be installed, if the glue is glued from the bottom of the pin cap 2, a silica gel sealing strip is firstly installed into the sealing groove 6 before the special pin is inserted, and the size of the silica gel sealing strip is matched with the size of the sealing groove 6. After the product is installed in place and solidified, the pin is pulled out, the pin is clamped by pliers at first, and the pin is rotated on the part of the plane 7 of the pin cap 2 to enable the pin to be debonded with solidified glue, or a special tool is used for clamping the rotating pin of the round hole 4; and then the pin pulling mode is selected according to the operable space of the pin installation position, if the product parts around the positioning pin cannot find out the force borrowing points, the pin pulling is performed by adopting a manual pin puller to connect through the threaded holes 5, and if the effective force borrowing points around the positioning pin or the product is not influenced, the pin pulling is performed by adopting a prying bar through the notch 3 of the pin cap 2.
The above examples are only for illustrating the present utility model and are not intended to limit the technical solution described in the present utility model, but are not intended to limit the present utility model, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (2)
1. The utility model provides a composite part shaping locating pin, its characterized in that includes locating pin axle and round pin cap, locating pin axle surface plating polytetrafluoroethylene film, round pin cap up end has the screw hole, and both sides are the plane, and the bottom sets up sled mouth and sealed recess, the round pin cap is the truncated cone shape, and the top end has the screw hole, and the screw thread size is unanimous with the pin puller, and both sides are the plane, and plane department all sets up the round hole, and hole diameter chi is 2-5mm, and the bottom sets up the seal groove, and the seal groove is semi-circular or rectangle, and the bottom sets up symmetrical breach simultaneously, and the breach shape is the shape of falling L or is the slope, and slope inclination is 10 ~ 15.
2. The composite part forming locating pin according to claim 1, wherein the locating pin is coated with a polytetrafluoroethylene film with a thickness of 15-100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322640869.XU CN221170283U (en) | 2023-09-27 | 2023-09-27 | Composite part forming locating pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322640869.XU CN221170283U (en) | 2023-09-27 | 2023-09-27 | Composite part forming locating pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221170283U true CN221170283U (en) | 2024-06-18 |
Family
ID=91458660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322640869.XU Active CN221170283U (en) | 2023-09-27 | 2023-09-27 | Composite part forming locating pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221170283U (en) |
-
2023
- 2023-09-27 CN CN202322640869.XU patent/CN221170283U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |