US20120312068A1

US20120312068A1 - Stamping tool

Info

Publication number: US20120312068A1
Application number: US13/158,351
Authority: US
Inventors: Zhi-Qiang Chen; Dong-Hua Tan; Sen-Hsiung Hu
Original assignee: Cheng Uei Precision Industry Co Ltd
Current assignee: Cheng Uei Precision Industry Co Ltd
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-12-13

Abstract

A stamping tool for stamping a product having an extending portion includes an upper mold having an inserting punch of which a bottom end defines an inclined pressing surface exposed under the upper mold, and a lower mold including an adjusting element, a sliding block, a returning block, a returning bolt and an elastic element. The returning bolt is inserted in the elastic element, and then screwed in the sliding block through the returning block. The sliding block is slidable between the returning block and the adjusting element and has one corner provided with an inclined abutting surface. The inclined pressing surface presses the abutting surface to push the sliding block and the returning bolt to slide towards the adjusting element so as to make the extending portion clipped between the sliding block and the adjusting element for modulating the product.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention generally relates to a stamping tool, and more particularly to a stamping tool capable of modulating deflection of a product stamped therein.
2. The Related Art
In a process of stamping a product in a conventional stamping tool, the product usually can't reach the request of the dimension. Moreover, the product is easily deformed or deflected during charging blocks to the stamping tool or returning materials from the stamping tool. In order to make sure the quality of the product, the deformed product or the deflected product need be taken out from the stamping tool. Then the deformed product and the deflected product should be modulated or modified to make them meet the standard request. So manufacturing procedures are increased, and working efficiency is lowered.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a stamping tool for stamping a product which has a base portion, and an extending portion extended from a bottom of the base portion. The stamping tool includes an upper mold and a lower mold. The upper mold includes an inserting punch. A bottom end of the inserting punch defines an inclined pressing surface exposed out from a bottom of the upper mold. The lower mold includes a lower mold plate, a short die pad and a lower modulating mechanism which includes an adjusting element, a sliding block, a modulating piece, a returning block, a returning bolt and an elastic element. The short die pad and the adjusting element are mounted on a top of the lower mold plate and abut against each other. The returning block is mounted on the top of the lower mold plate apart from the adjusting element. The sliding block is slidably mounted on the top of the lower mold plate between the returning block and the adjusting element. The returning bolt is screwed into the sliding block through the returning block to drive the sliding block to abut against the returning block and be apart from the adjusting element under the action of the elastic element. A top of the sliding block is concaved downward to form a receiving groove opened to face the adjusting element for receiving the modulating piece therein so as to carry the modulating piece to move in on or away from the adjusting element. One corner of the top of the sliding block opposite to the receiving groove is cut off to form an inclined abutting surface matching with the inclined pressing surface. When the stamping tool is closed, the base portion of the product is positioned between the adjusting element, the modulating piece and the upper mold with the extending portion being suspended between the adjusting element and the modulating piece. The inclined pressing surface of the inserting punch presses the abutting surface to push the sliding block together with the modulating piece and the returning bolt to slide towards the adjusting element and away from the returning block so as to make the extending portion clipped between the modulating piece and the adjusting element for modulating the product to be a standard shape in the stamping tool.
As described above, the stamping tool modulates the product in the stamping tool to be a standard shape by means of the modulating mechanism. As a result, the product can be parted from the stamping tool without any deformation. So, defective rate of the product is lowered, and manufacturing efficiency is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be apparent to those skilled in the art by reading the following description, with reference to the attached drawings, in which:

FIG. 1 is a cross-sectional view of a stamping tool having a modulating mechanism, wherein the stamping tool is opened;

FIG. 2 is a perspective view of the modulating mechanism of the stamping tool of FIG. 1;

FIG. 3 is a cross-sectional view of the stamping tool of FIG. 1, wherein the stamping tool is closed with a deformed product being remained therein;

FIG. 4 is a partially enlarged view of the stamping tool of FIG. 3;

FIG. 5 is a cross-sectional view of the stamping tool of FIG. 1, wherein the stamping tool is closed with a product being modulated therein; and

FIG. 6 is a partially enlarged view of the stamping tool of FIG. 5.

DETAILED DESCRIPTION OF THE EMBODIMENT

Referring to FIG. 1 and FIG. 4, an embodiment of a stamping tool 100 according to the present invention is shown. The stamping tool 100 adapted for stamping a product 200 includes an upper mold 10, a lower mold 20 and a modulating mechanism 30 which includes an upper modulating mechanism 31 mounted in the upper mold 10 and a lower modulating mechanism 32 mounted in the lower mold 20.
Referring to FIG. 1 and FIG. 2, the upper mold 10 includes an upper mold plate 11, at least one punch pad 121, a punch holder 122, a stripper pad 131, a stripper plate 132 and the upper modulating mechanism 31. The upper modulating mechanism 31 includes an inverted L-shaped inserting punch 14, an inverted L-shaped modulating element 15, an inverted L-shaped modulating base 16 and a screw 17. One corner of a bottom end of a vertical arm of the inserting punch 14 is cut off to define an inclined pressing surface 141. A bottom of a free end of an upper level arm of the modulating element 15 is concaved upward to form a clipping groove 151 slightly inclined downward. A substantial middle of a vertical arm of the modulating base 16 defines a first screw hole 161 penetrating through the vertical arm of the modulating base 16 along the extending direction of an upper level arm of the modulating base 16. A substantial middle of a bottom of the stripper plate 132 is concaved upward to form a notch 133.
Referring to FIG. 1 and FIG. 2, when the upper mold 10 is assembled, the stripper pad 131 is mounted on the stripper plate 132, and the punch holder 122 is mounted on the stripper pad 131. The punch holder 122 defines an inverted L-shaped punching groove 111 with an upper level part thereof penetrating through a top of the punch holder 122 and a vertical part thereof vertically penetrating through the stripper pad 131 and the stripper plate 132. The inserting punch 14 is inserted downward in the punching groove 111 with a top end thereof being exposed beyond the top of the punch holder 122 and the bottom end together with the inclined pressing surface 141 being exposed out from the stripper plate 132 of the upper mold 10. One side of a bottom of the punch pad 121 defines an inserting groove 112 extending sideward to penetrate through the punch pad 121. Then the punch pad 121 is mounted on the punch holder 122 with an inner end of the inserting groove 112 for receiving the upper level arm of the modulating element 15 therein with the top of the inserting punch 14 being received in the clipping groove 151 of the modulating element 15. The upper mold plate 11 is mounted on top of the punch pad 121. The modulating base 16 is mounted on a bottom of the upper mold plate 11 and located above a rear end of a top of the modulating element 15. The screw 17 passes through the screw hole 161 to screw in a rear of the modulating element 15 to fasten the modulating element 15 in the upper mold 10.
Referring to FIG. 1 and FIG. 2, the lower mold 20 includes a lower mold plate 21, a long die pad 25, a short die pad 26 and a lower modulating mechanism 32. The lower modulating mechanism 32 includes an adjusting element 22, a sliding block 23, a modulating piece 29, a returning block 24, a returning bolt 27 and an elastic element 28. A middle of a front of the modulating piece 29 is protruded frontward to form an adjusting pin 291 facing to the adjusting element 22. One end surface of the adjusting element 22 defines a through-hole 221 longitudinally penetrating through the adjusting element 22. One end surface of the sliding block 23 defines a second screw hole 231 longitudinally penetrating through the sliding block 23. A front of a top of the sliding block 23 is concaved downward to form a receiving groove 232 penetrating through the other end surface of the sliding block 23 and facing the adjusting element 22 for receiving the modulating piece 29 therein so as to carry the modulating piece 29 to move in on or away from the adjusting element 22. One corner of the sliding block 23 opposite to the receiving groove 232 is cut off to define an abutting surface 233 matching with the inclined pressing surface 141. One end surface of the returning block 24 defines an inserting hole 241 longitudinally penetrating through the returning block 24.
Referring to FIG. 1 and FIG. 2, when the lower mold 20 is assembled, the long die pad 25 is mounted on a middle of a top of the lower mold plate 21. The short die pad 26 is mounted on one end of a top of the long die pad 25. The adjusting element 22 is mounted on the top of the long die pad 25 with the other end surface of the adjusting element 22 being abutting against the short die pad 26. The returning block 24 is mounted on the other end of the top of the long die pad 25 of the lower mold 20 apart from the adjusting element 22. The sliding block 23 is slidably mounted on the top of the long die pad 25 between the returning block 24 and the adjusting element 22 with the one end surface of the sliding block 23 being abutting against the returning block 24. The sliding block 23 is distanced from the adjusting element 22 to define a space 40 therebetween. The returning bolt 27 is inserted in the elastic element 28, and then passes through the inserting hole 241 of the returning block 24 to screw in the second screw hole 231 to fasten the returning bolt 27 in the sliding block 23 to drive the sliding block 23 to abut against the returning block 24 and be apart from the adjusting element 22 under the action of the elastic element 28. At this time, the elastic element 28 is located between the returning block 24 and a rear end of the returning bolt 27. The modulating piece 29 is mounted on a bottom wall of the receiving groove 232.
Referring to FIG. 1, FIG. 2, FIG. 3, FIG. 5 and FIG. 6, when the stamping tool 100 is closed, the upper mold 10 moves downward towards the lower mold 20. The product 200 stamped in the stamping tool 100 has a base portion 201, an extending portion 202 extended from a middle of a bottom of the base portion 201, and a cantilever 204 connected with one end of the base portion 201. The extending portion 202 defines a perforation 203. The base portion 201 of the product 200 is positioned between a top of the adjusting element 22, a top of the modulating piece 29 and a bottom of the stripper plate 132 with the extending portion 202 being suspended between the adjusting element 22 and the modulating piece 29. The cantilever 204 is received in the notch 133. The extending portion 202 is stretched in the space 40. The inclined pressing surface 141 of the inserting punch 14 presses the abutting surface 233 of the sliding block 23 to push the sliding block 23 together with the modulating piece 29 and the returning bolt 27 to slide towards the adjusting element 22 and away from the returning block 24 with the elastic element 28 being shown a retracting status. At the same time, the screw 17 is screwed outward to pull the modulating element 15 away from the top of the inserting punch 14 and the adjusting pin 291 of the modulating piece 29 is still away from the perforation 203 of the product 200. Then the screw 17 screws inward to push the modulating element 15 into the upper mold 10 to make the top of the inserting punch 14 being received in the clipping groove 151 to make the inserting punch 14 further press the abutting surface 233 of the sliding block 23 to drive the adjusting pin 291 of the modulating piece 29 to insert in the through-hole 221 through the perforation 203 so as to make the extending portion 202 clipped between the modulating piece 29 and the adjusting element 22 for modulating the product 200 to be a standard shape in the stamping tool 100.
Referring to FIG. 1, FIG. 2 and FIG. 4, when the stamping tool 1 is opened, the upper mold 10 moves upward to drive the inserting punch 14 to move upward, so that the sliding block 23 rebounds to resist against the returning block 24 and the returning bolt 27 moves away from the adjusting element 22 under the action of the elastic element 28. And the adjusting pin 291 is returned from the through-hole 221 through the perforation 203. The notch 133 is away from the cantilever 204. Then the product 200 can be parted from the stamping tool 100 without any deflection.
As described above, the stamping tool 100 modulates the product 200 in the stamping tool 100 to be a standard shape by means of the modulating mechanism 30. As a result, the product 200 can be parted from the stamping tool 100 without any deformation. So, defective rate of the product 200 is lowered, and manufacturing efficiency is improved.

Claims

1. A stamping tool for stamping a product which has a base portion and an extending portion extended from a bottom of the base portion, comprising:

an upper mold including an inserting punch, a bottom end of the inserting punch defining an inclined pressing surface exposed out from a bottom of the upper mold; and

a lower mold including a lower mold plate, a short die pad and a lower modulating mechanism which includes an adjusting element, a sliding block, a modulating piece, a returning block, a returning bolt and an elastic element, the short die pad and the adjusting element being mounted on a top of the lower mold plate and abutting against each other, the returning block being mounted on the top of the lower mold plate apart from the adjusting element, the sliding block being slidably mounted on the top of the lower mold plate between the returning block and the adjusting element, the returning bolt being screwed into the sliding block through the returning block to drive the sliding block to abut against the returning block and be apart from the adjusting element under the action of the elastic element, a top of the sliding block being concaved downward to form a receiving groove opened to face the adjusting element for receiving the modulating piece therein so as to carry the modulating piece to move in on or away from the adjusting element, one corner of the top of the sliding block opposite to the receiving groove being cut off to form an inclined abutting surface matching with the inclined pressing surface;

wherein when the stamping tool is closed, the base portion of the product is positioned between the adjusting element, the modulating piece and the upper mold with the extending portion being suspended between the adjusting element and the modulating piece, and the inclined pressing surface of the inserting punch presses the abutting surface to push the sliding block together with the modulating piece and the returning bolt to slide towards the adjusting element and away from the returning block so as to make the extending portion clipped between the modulating piece and the adjusting element for modulating the product to be a standard shape in the stamping tool.

2. The stamping tool as claimed in claim 1, wherein one end of the modulating piece facing the adjusting element is protruded towards the adjusting element to form an adjusting pin capable of being inserted in the extending portion of the product to position the extending portion between the adjusting element and the modulating piece, when the stamping tool is closed.