CN219357602U - A mould for panel beating punching press screw - Google Patents
A mould for panel beating punching press screw Download PDFInfo
- Publication number
- CN219357602U CN219357602U CN202320454256.4U CN202320454256U CN219357602U CN 219357602 U CN219357602 U CN 219357602U CN 202320454256 U CN202320454256 U CN 202320454256U CN 219357602 U CN219357602 U CN 219357602U
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- hole
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- screw
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a die for stamping screw holes in sheet metal. The die comprises a female die, a male die and a punching needle, wherein a first through hole is formed in the top surface of the female die, a circle of spiral groove is formed in the periphery of the first through hole, a first cutting surface is formed between the head and the tail of the spiral groove, a circle of spiral protrusion is formed on the bottom surface of the male die corresponding to the spiral groove, a second through hole is formed in the center of the spiral protrusion, a second cutting surface is formed between the head and the tail of the spiral protrusion, the punching needle is arranged in the second through hole, the male die and the female die are assembled to punch a sheet metal part, the spiral protrusion and the spiral groove enable the sheet metal part to form a spiral screw hole body, the first cutting surface and the second cutting surface are matched with each other to form a tearing part, so that the screw hole body has height differences on two sides of the tearing part, and the punching needle penetrates the screw hole body to extend into the first through hole. The screw hole body is punched by matching the punch pin, the spiral bulge and the spiral groove, so that the self-tapping screw is convenient to connect. The first cutting surface and the second cutting surface conveniently form a tearing part.
Description
Technical Field
The utility model relates to the technical field of stamping dies, in particular to a die for stamping screw holes in metal plates.
Background
At present, a screw hole is punched on a sheet metal part as a common means, however, on the market, the screw hole punched by a die for punching the screw hole is a straight wall through hole, namely, when a self-tapping screw is in threaded connection with the punching screw hole, a thread of the self-tapping screw is in interference fit with the hole wall of the punching screw hole to achieve the fastening purpose, so that the self-tapping screw is hard to screw in or screw out of the punching screw hole, the hole wall of the self-tapping screw sliding wire or the punching screw hole is damaged for a plurality of times, the connection stability of the self-tapping screw and the punching screw hole is affected, and the repeatability is poor.
Disclosure of Invention
The utility model aims to provide a die for stamping a screw hole of a sheet metal, wherein a stamped screw hole body is convenient to connect by self-tapping screws.
The object of the present utility model is thus achieved.
A die for stamping screw holes on metal plates comprises a female die and a male die, wherein a first through hole is arranged on the top surface of the female die, a circle of spiral grooves are arranged on the periphery of the first through hole, a first cutting surface is formed between the head and the tail of each spiral groove,
a circle of spiral bulges are arranged on the bottom surface of the male die corresponding to the spiral grooves, a second through hole is arranged in the center of each spiral bulge, a second cutting surface is formed between the heads and the tails of the spiral bulges,
the punching pin is arranged in the second through hole, the male die and the female die are matched to punch the sheet metal part, the spiral protrusion and the spiral groove enable the sheet metal part to form a spiral screw hole body, the first cutting face and the second cutting face are matched to form a tearing portion on one side of the screw hole body, the screw hole body is enabled to have height differences on two sides of the tearing portion, and the punching pin penetrates through the screw hole body and extends into the first through hole.
The above technical solution can be further perfected as follows.
More specifically, the male die approaches the female die until the concave-convex gap between the male die and the female die is equal to the thickness of the stamping sheet metal part.
More specifically, the first cutting face and the second cutting face are all vertical, and the first cutting face and the second cutting face are parallel dislocation from top to bottom.
More specifically, the terrace die top is equipped with spacing hole, spacing hole and second through-hole intercommunication form the step face between spacing hole and the second through-hole, and the punch needle top is equipped with spacing portion, and spacing portion is arranged in spacing hole, and spacing portion offsets with the step face, and the restriction punch needle continues to extend to in the first through-hole.
More specifically, the diameters of the first through hole and the second through hole are equal.
More specifically, the internal diameter of helicla flute is first through-hole diameter, and the internal diameter of helicla flute is the helicla flute along first through-hole axial, and the head and the tail end of helicla flute internal diameter are in axial direction coincidence, and the external diameter of helicla flute is the helicla flute and sets up at the die top surface, and the interval between the internal diameter of helicla flute and the external diameter is the interval widening gradually in first through-hole radial direction.
More specifically, the inside diameter of the spiral bulge is the diameter of the second through hole, the inside diameter of the spiral groove is spiral along the axial direction of the second through hole, the head end and the tail end of the inside diameter of the spiral bulge are overlapped in the axial direction, the outside diameter of the spiral bulge is spirally arranged on the bottom surface of the male die, and the distance between the inside diameter and the outside diameter of the spiral bulge is gradually widened in the radial direction of the second through hole.
The utility model has the following beneficial effects.
The screw hole body is punched by matching the punch pin, the spiral bulge and the spiral groove, so that the self-tapping screw is convenient to connect. The first cutting surface and the second cutting surface conveniently form a tearing part of the screw hole body, so that the screw hole body is connected with a corresponding self-tapping screw in an adaptive mode. The concave-convex gap between the male die and the female die is equal to the thickness of the stamping sheet metal part, namely, the thickness of the screw hole body is equal to the pitch of the self-tapping screw matched with the screw hole body, when the screw hole body is connected with the self-tapping screw, the screw thread of the self-tapping screw is not easy to slide, the hole wall of the screw hole body is also not easy to damage, the screw hole body can be repeatedly used, and the service life is prolonged. And the limit part and the limit hole are designed to prevent the punch needle from falling into the second through hole completely.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment.
Fig. 2 is an exploded view of the first embodiment.
FIG. 3 is a schematic diagram of a convex mold structure according to an embodiment.
Figure 4 is a side view of the punch of the first embodiment.
Fig. 5 is a bottom view of the punch in the first embodiment.
Fig. 6 is a schematic diagram of a die structure in the first embodiment.
Fig. 7 is a side view of a female die in a first embodiment.
Fig. 8 is a top view of a female die in the first embodiment.
Fig. 9 is a schematic structural view of a screw hole body punched by a sheet metal part.
Fig. 10 is a schematic structural view (another view) of a sheet metal part with a screw hole body punched therein.
Fig. 11 is a top view of a sheet metal part punched with a screw hole body.
FIG. 12 is a schematic view of the cross-sectional structure of the A-A direction part in FIG. 11.
FIG. 13 is a schematic view of the cross-sectional structure of the B-B direction part in FIG. 11.
In the drawings, the broken lines indicate the outlines of the parts or hidden structures.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
In a first embodiment, referring to fig. 1-8, a die for stamping a screw hole in a metal plate comprises a female die 1, a male die 2 and a punch pin 3. The top surface of the female die 1 is provided with a first through hole 11, the periphery of the first through hole 11 is provided with a circle of spiral grooves 12, and a first cutting surface 13 is formed between the heads and the tails of the spiral grooves 12. Specifically, the inner diameter of the spiral groove 12 is the diameter of the first through hole 11, the inner diameter of the spiral groove 12 is spiral along the axial direction of the first through hole 11, the head end and the tail end of the inner diameter of the spiral groove 12 are overlapped in the axial direction, the outer diameter of the spiral groove 12 is spirally arranged on the top surface of the female die 1, and the space between the inner diameter and the outer diameter of the spiral groove 12 is gradually widened in the radial direction of the first through hole 11. The spiral groove 12 is shaped as shown in fig. 6-8.
The bottom surface of the male die 2 is provided with a circle of spiral bulges 22 corresponding to the spiral grooves 12, the center of each spiral bulge 22 is provided with a second through hole 21, and a second cutting surface 23 is formed between the heads and the tails of the spiral bulges 22. Specifically, the inner diameter of the spiral protrusion 22 is the diameter of the second through hole 21, the inner diameter of the spiral groove 12 is spiral along the axial direction of the second through hole 21, the head end and the tail end of the inner diameter of the spiral protrusion 22 are overlapped in the axial direction, the outer diameter of the spiral protrusion 22 is spirally arranged on the bottom surface of the male die 2, and the interval between the inner diameter and the outer diameter of the spiral protrusion 22 is gradually widened in the radial direction of the second through hole 21. The spiral protrusion 22 is shaped as shown in fig. 3-5. The diameters of the first through hole 11 and the second through hole 21 are equal, the first cutting surface 13 and the second cutting surface 23 are all vertically arranged, the first cutting surface 13 and the second cutting surface 23 are vertically and parallelly staggered, namely, the first cutting surface 13 and the second cutting surface 23 are close to the tearing sheet metal part 4.
The top of the punch needle 3 is provided with a limiting part 31, the top of the corresponding punch 2 is provided with a limiting hole 24, the limiting hole 24 is communicated with the second through hole 21, a step surface 25 is formed between the limiting hole 24 and the second through hole 21, the punch needle 3 is arranged in the second through hole 21, the limiting part 31 is arranged in the limiting hole 24, the limiting part 31 and the step surface 25 are propped against each other, and the punch needle 3 is limited to extend into the first through hole 11 continuously.
When the male die 2 and the female die 1 are matched to punch the sheet metal part 4, the spiral protrusion 22 and the spiral groove 12 enable the sheet metal part 4 to form the spiral screw hole body 5, meanwhile, the first cutting face 13 and the second cutting face 23 are matched to cut on one side of the screw hole body 5 to form the tearing part 6, and the screw hole body 5 is enabled to have height differences on two sides of the tearing part 6. The punch pin 3 extends from the second through hole 21, penetrates the screw hole body 5 and extends into the first through hole 11 until the limiting part 31 abuts against the step surface 25. Preferably, the punch 2 approaches the die 1 to be clamped until the concave-convex gap between the punch 2 and the die 1 is equal to the thickness of the stamped sheet metal part 4.
The shape of the screw hole body 5 punched on the sheet metal part 4 is shown in fig. 9-13. Specifically, the tearing part 6 is arranged on one side of the screw hole body 5, and the screw hole body 5 forms a height difference on two sides of the tearing part 6, so that the screw hole body 5 is spiral along the screwing direction of the self-tapping screw. In this embodiment, the tearing portion 6 is a fracture surface formed by punching along the axial direction of the screw hole body 5.
Specifically, the screw hole body 5 includes a staggered layer inner hole 7 and an outer forming concave hole 8, the staggered layer inner hole 7 is a punching through hole penetrating through the sheet metal part 4 (namely, a hole formed by penetrating the sheet metal part 4 through the punching pin 3), the outer forming concave hole 8 is a punching concave hole (namely, a spiral protrusion 22 and a spiral groove 12 are formed by punching) on the sheet metal part 4, and the outer forming concave hole 8 is arranged along the outline of the staggered layer inner hole 7. The internal diameter of outer shaping shrinkage pool 8 is split-level hole 7 diameter, and in the radial direction of outer shaping shrinkage pool 8, the internal diameter of outer shaping shrinkage pool 8 is less than the external diameter of outer shaping shrinkage pool 8, and outer shaping shrinkage pool 8 external diameter top is on sheet metal component 4 punching press screw body 5's plane all the time, and outer shaping shrinkage pool 8 internal diameter is from high to low, and interval between outer shaping shrinkage pool 8 internal diameter and the external diameter of outer shaping shrinkage pool 8 widens gradually.
Wherein, the diameter of the staggered layer inner hole 7 is equal to the inner diameter of the screw thread on the self-tapping screw of the adaptive screw hole body 5. The tear portion 6 forms a first tear 9 in the split-layer inner hole 7, and the first tear 9 spirals the split-layer inner hole 7. The height distance d of the staggered-layer inner holes 7 at the first tearing openings 9 is equal to the pitch of the self-tapping screw. The thickness of the sheet metal part 4 is equal to the pitch of the self-tapping screw matched with the screw hole body 5.
The self-tapping screw is screwed in or out of the staggered inner hole 7, the staggered inner hole 7 is well arranged in two adjacent screw teeth on the self-tapping screw, so that the self-tapping screw and the screw hole body 5 are fixedly connected, and the screw teeth of the self-tapping screw and the wall of the staggered inner hole 7 are not easy to damage. The self-tapping screw continues to be screwed in until the nut of the self-tapping screw is placed in the outer forming concave hole 8.
Claims (7)
1. A die for stamping screw holes on metal plates comprises a female die and a male die, and is characterized in that a first through hole is arranged on the top surface of the female die, a circle of spiral grooves are arranged on the periphery of the first through hole, a first cutting surface is formed between the head and the tail of each spiral groove,
a circle of spiral bulges are arranged on the bottom surface of the male die corresponding to the spiral grooves, a second through hole is arranged in the center of each spiral bulge, a second cutting surface is formed between the heads and the tails of the spiral bulges,
the punching pin is arranged in the second through hole, the male die and the female die are matched to punch the sheet metal part, the spiral protrusion and the spiral groove enable the sheet metal part to form a spiral screw hole body, the first cutting face and the second cutting face are matched to form a tearing portion on one side of the screw hole body, the screw hole body is enabled to have height differences on two sides of the tearing portion, and the punching pin penetrates through the screw hole body and extends into the first through hole.
2. The die for stamping screw holes in sheet metal of claim 1, wherein the male die approaches the female die until a relief gap between the male die and the female die is equal to a thickness of the stamped sheet metal part.
3. The die for stamping a screw hole in sheet metal of claim 1, wherein the first cutting surface and the second cutting surface are vertically arranged and are vertically staggered in parallel.
4. The die for stamping the screw hole on the metal plate according to claim 1, wherein the top of the male die is provided with a limiting hole, the limiting hole is communicated with the second through hole, a step surface is formed between the limiting hole and the second through hole, the top of the punching needle is provided with a limiting part, the limiting part is arranged in the limiting hole, the limiting part abuts against the step surface, and the punching needle is limited to extend into the first through hole continuously.
5. The die for stamping a screw hole in sheet metal of claim 1, wherein the first through hole and the second through hole are equal in diameter.
6. The die for stamping screw holes in sheet metal according to claim 1, wherein the inner diameter of the spiral groove is a first through hole diameter, the inner diameter of the spiral groove is spiral along the axial direction of the first through hole, the head end and the tail end of the inner diameter of the spiral groove are overlapped in the axial direction, the outer diameter of the spiral groove is spirally arranged on the top surface of the die, and the interval between the inner diameter and the outer diameter of the spiral groove is gradually widened in the radial direction of the first through hole.
7. The die for stamping screw holes in sheet metal according to claim 1, wherein the inner diameter of the spiral protrusion is the diameter of the second through hole, the inner diameter of the spiral groove is spiral along the axial direction of the second through hole, the head end and the tail end of the inner diameter of the spiral protrusion are overlapped in the axial direction, the outer diameter of the spiral protrusion is spirally arranged on the bottom surface of the male die, and the space between the inner diameter and the outer diameter of the spiral protrusion is gradually widened in the radial direction of the second through hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023203663824 | 2023-03-02 | ||
| CN202320366382 | 2023-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219357602U true CN219357602U (en) | 2023-07-18 |
Family
ID=87137218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320454256.4U Active CN219357602U (en) | 2023-03-02 | 2023-03-11 | A mould for panel beating punching press screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219357602U (en) |
-
2023
- 2023-03-11 CN CN202320454256.4U patent/CN219357602U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |