Sheet metal rectangular hole stamping progressive die, equipment and manufacturing method

Abstract

The application discloses a sheet metal rectangular hole stamping progressive die, equipment and manufacturing method, and relates to the technical field of stamping. The progressive die comprises a shearing sub-die, a cutting sub-die and a back pressure sub-die. When the shearing sub-die is closed, a notch is formed at a preset position of the sheet metal, and the material in contact with the inclined surface of the cutter head is bent to form a notch plane and a notch inclined surface distributed on both sides of the notch. When the cutting sub-die is closed, the material with a fourth preset distance from the notch is cut on the notch plane. When the back pressure sub-die is closed, the bent notch inclined surface is flattened. By adopting the sheet metal narrow rectangular hole stamping progressive die and stamping equipment, a narrow rectangular hole with a correct size can be manufactured on the sheet metal through a stamping manufacturing method. The damage rate of the punch is reduced, the safety risk of manufacturing is improved, and the manufacturing cost is effectively controlled. The progressive die has high compatibility and wide applicability, and is suitable for manufacturing narrow rectangular holes of various specifications.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and in particular to a progressive die, equipment and manufacturing method for stamping rectangular holes in sheet metal parts. Background Technology

[0002] To ensure the multi-functionality and high performance of servers, more and more hardware devices are being assembled inside server chassis. The assembly of various module units is becoming more and more compact, the design of the corresponding chassis structure is becoming more and more complex, and the chassis manufacturing process is becoming more and more precise.

[0003] Narrow rectangular holes on server chassis often require sheet metal stamping processes for manufacturing. For manufacturing such... Figure 1 As shown, for rectangular narrow holes with a width of less than 1mm, existing manufacturing processes employ methods such as... Figure 2 The punch shown directly stamps the sheet metal part, and the depth of the punch is as follows: Figure 3 As shown. Due to the long length and narrow width of the rectangular hole, and the extended narrow rectangular shape of the punch in the stamping direction, the punch is highly susceptible to breakage and damage during manufacturing due to wear and mechanical stress.

[0004] Therefore, in order to maintain normal production operations, multiple sets of punches are needed to replace damaged ones. However, replacing punches increases production costs, and frequent punch replacements and adjustments severely impact production efficiency. Furthermore, punch breakage during production can also pose significant safety hazards.

[0005] Improving the aforementioned issues in terms of punch strength involves not only the development of high-strength materials and the manufacturing process of narrow rectangular punches, but also significant investment in research and development cycles and costs. Solving these problems requires substantial investment and a long development cycle. Therefore, there is an urgent need for a stamping die, equipment, and manufacturing method for rectangular holes in sheet metal parts that can effectively reduce punch wear, ensure safe production, and be easily compatible with existing production processes during the manufacturing of narrow rectangular holes in sheet metal parts. Summary of the Invention

[0006] To address the problem of punch wear and breakage during the stamping of narrow rectangular holes in sheet metal parts in existing technologies, this invention provides a stamping die, equipment, and manufacturing method for rectangular holes in sheet metal parts. These methods effectively reduce punch wear, ensure safe production, and are easily compatible with existing production processes.

[0007] To solve one or more of the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] In one aspect, a progressive die for stamping rectangular holes in sheet metal parts is provided, the progressive die including: a shearing sub-die, a cutting sub-die, and a back pressure sub-die;

[0009] The shearing die includes: a first upper die and a first lower die adapted to the first upper die; the cutter head of the first upper die is wedge-shaped;

[0010] When the cutting sub-die is closed, a cut is made at a preset position on the sheet metal part to be punched, and the part of the material that contacts the cut and the bevel of the cut head is bent to form a cut plane and a cut bevel distributed on both sides of the cut.

[0011] The cutting sub-mold includes: a second upper mold and a second lower mold adapted to the second upper mold; the second upper mold has a first chamfer on the side that contacts the beveled surface of the cut;

[0012] When the sub-mold is closed, the material at the fourth preset distance from the cut is removed from the cutting plane;

[0013] The back pressure die includes: a back pressure upper die, and a back pressure lower die adapted to the back pressure upper die;

[0014] When the back pressure die is closed, the bent beveled part is flattened to form a rectangular hole.

[0015] Furthermore, the first lower die includes: a bending lower support block and a first lower support block;

[0016] The bending lower support block includes at least a first surface of the bending lower support block, and the first lower support block includes at least a first surface of the first lower support block; the first surface of the bending lower support block is parallel to the first surface of the first lower support block;

[0017] The distance between the first surface of the bent lower support block and the first surface of the first lower support block is a first preset distance.

[0018] Furthermore, the first upper mold includes at least: a first upper mold first surface and a first upper mold inclined surface;

[0019] The first surface of the first upper mold is located on one side of the first lower support block and is parallel to the first surface of the first lower support block;

[0020] The angle between the first surface of the first upper mold and the inclined surface of the first upper mold is a preset angle.

[0021] Furthermore, the second lower mold includes: a second lower support block, and a cut-off support block;

[0022] The second lower support block includes at least the first surface of the second lower support block, and the cut-off support block includes at least the first surface of the cut-off support block; the first surface of the second lower support block is parallel to the first surface of the cut-off support block.

[0023] The second lower support block has a second chamfer on the side that contacts the beveled surface of the cut. When the mold is closed, the distance between the first chamfer and the second chamfer is a second preset distance.

[0024] Furthermore, the second upper mold includes at least the first surface of the second upper mold;

[0025] The first surface of the second upper mold is located on one side of the cut-off support block and is parallel to the first surface of the cut-off support block.

[0026] Furthermore, the upper back pressure die includes at least a first surface of the upper back pressure die, and the lower back pressure die includes at least a first surface of the lower back pressure die;

[0027] The first surface of the upper back pressure die is parallel to the first surface of the lower back pressure die;

[0028] When the mold is closed, the distance between the first surface of the upper mold and the first surface of the lower mold is the third preset distance.

[0029] In a second aspect, a sheet metal rectangular hole stamping equipment is provided, the equipment comprising: a sheet metal rectangular hole stamping progressive die as described in the first aspect above, used to manufacture rectangular holes on the sheet metal part to be stamped by a stamping process.

[0030] The following stations are set sequentially in the direction of the conveyor belt travel: the first station, the second station, and the third station;

[0031] The first station is equipped with a cutting sub-mold. When the cutting sub-mold is closed, a cut is made at the preset position of the sheet metal part to be punched, and the part of the material that contacts the cut and the bevel of the cut head is bent to form a cutting plane and a cutting bevel distributed on both sides of the cut.

[0032] The second workstation is equipped with a cutting sub-mold. When the cutting sub-mold is closed, the material at the fourth preset distance from the cut is cut off on the cutting plane.

[0033] The third station is equipped with a back pressure mold. When the back pressure mold is closed, it flattens the bent beveled part of the cut to form a rectangular hole.

[0034] Thirdly, a method for manufacturing rectangular holes in sheet metal parts by stamping is provided, which uses a rectangular hole stamping device for sheet metal parts described in the second aspect above to manufacture rectangular holes in the sheet metal parts to be stamped, the method comprising:

[0035] The sheet metal part to be punched, placed on the material strip, is sent to the first station for punching. A cut is made at the preset position of the sheet metal part to be punched, and the part of the material that contacts the cut and the bevel of the cut head is bent to form a cut plane and a cut bevel distributed on both sides of the cut.

[0036] The sheet metal part to be punched is sent to the second station for punching. On the cutting plane, the material at the fourth preset distance from the cutting is removed.

[0037] The sheet metal part to be punched is sent to the third station, and the back pressure mold located at the third station is closed to flatten the bent cut bevel part and form a rectangular hole.

[0038] Further, the sheet metal part to be punched, placed on the strip, is sent to the first station for punching. A cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cutter head is bent to form a cut plane and a cut bevel distributed on both sides of the cut, including:

[0039] The sheet metal part to be punched, placed on the material strip, is sent to the first station. A positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched. The positioning pin and the positioning hole are used together to fix the sheet metal part to be punched.

[0040] Close the shearing mold, create a cut at the preset position of the sheet metal part to be punched, and bend the part of the material that contacts the cut and the bevel of the cut head to form a cut plane and a cut bevel distributed on both sides of the cut.

[0041] The cutting sub-die is separated to allow the sheet metal parts to be punched, placed on the strip, to be moved to the next station.

[0042] Further, the sheet metal part to be punched is sent to the second station for punching. On the cutting plane, material is removed from the cutting edge at a fourth preset distance, including:

[0043] The sheet metal part to be punched, placed on the material strip, is sent to the second station. A positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched.

[0044] Close the cut-off sub-mold and cut off the material at the fourth preset distance from the cut on the cut plane;

[0045] The cutting sub-die is used to separate the die so that the sheet metal part to be punched, placed on the strip, can be moved to the next station.

[0046] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0047] 1. By employing the sheet metal part narrow rectangular hole stamping progressive die and stamping equipment disclosed in the invention, narrow rectangular holes of the specified dimensions can be manufactured on sheet metal parts by stamping manufacturing method;

[0048] 2. By changing the manufacturing method, the strength of the punch was ensured, the damage rate of the punch was reduced, the safety risks in manufacturing were improved, and the manufacturing cost was effectively controlled.

[0049] 3. It has strong compatibility and wide applicability, and is suitable for manufacturing narrow rectangular holes of various specifications. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a top view of the narrow rectangular opening in the server chassis;

[0052] Figure 2 This is a schematic diagram of a punch used to create narrow rectangular holes;

[0053] Figure 3 This is a side view of the punch's downward cutting position when the die is closed during the stamping process;

[0054] Figure 4 This is a schematic diagram of a progressive die shearing sub-die for stamping rectangular holes in sheet metal parts, provided in an embodiment of the present invention.

[0055] Figure 5 This is a schematic diagram of a progressive die for cutting off a rectangular hole in a sheet metal part, provided in an embodiment of the present invention.

[0056] Figure 6 This is a schematic diagram of a progressive die return mold for stamping rectangular holes in sheet metal parts, provided in an embodiment of the present invention.

[0057] Figure 7 This is a schematic diagram of a sheet metal rectangular hole punching device provided in an embodiment of the present invention;

[0058] Figure 8 This is a schematic diagram of a positioning pin and a positioning hole provided in an embodiment of the present invention;

[0059] Figure 9 This is a schematic diagram of a method for manufacturing rectangular holes in sheet metal parts by stamping, provided in an embodiment of the present invention. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0061] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The numbers in the accompanying drawings are only used to distinguish individual functional parts or modules and do not indicate logical relationships between parts or modules. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0062] The various embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repeated descriptions of them will be omitted.

[0063] In addressing the problem of punch wear and breakage during the stamping of narrow rectangular holes in sheet metal parts in existing technologies, this invention provides a stamping die, equipment, and manufacturing method for rectangular holes in sheet metal parts. These methods effectively reduce punch wear, ensure safe production, and are easily compatible with existing production processes.

[0064] In one embodiment, a progressive die for stamping rectangular holes in sheet metal parts includes: a shearing sub-die 11, a cutting sub-die 12, and a back pressure sub-die 13.

[0065] The cutting die 11 includes: a first upper die 111, and a first lower die 112 adapted to the first upper die; the cutting head of the first upper die is wedge-shaped, such as... Figure 4 As shown.

[0066] When the shearing sub-die 11 is closed, a cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut. In this embodiment, when the die is closed, the tip of the cut of the first upper die 111 falls 2mm below the level of the first lower die 112.

[0067] The cutting sub-mold 12 includes: a second upper mold 121, and a second lower mold 122 adapted to the second upper mold; the second upper mold has a first chamfer on the side that contacts the beveled surface of the cut, such as... Figure 5 As shown.

[0068] When the sub-mold 12 is closed, the material at the fourth preset distance from the cut is removed on the cutting plane;

[0069] The back pressure die 13 includes: a back pressure upper die, and a back pressure lower die 132 adapted to the back pressure upper die 131, such as... Figure 6 As shown.

[0070] When the back pressure die 13 is closed, the bent beveled part is flattened to form a rectangular hole.

[0071] The first lower mold 112 includes: a bending lower support block 1121 and a first lower support block 1122;

[0072] The bending lower support block 1121 includes at least a bending lower support block first surface, and the first lower support block 1122 includes at least a first lower support block first surface; the bending lower support block first surface is parallel to the first lower support block first surface.

[0073] The first surface of the bending lower support block and the first surface of the first lower support block are separated by a first preset distance, wherein the first preset distance is greater than 3T, where T is the material thickness, which in this embodiment is the thickness of the sheet metal part to be punched, 1.2mm.

[0074] The first upper mold 111 includes at least: a first upper mold first surface and a first upper mold inclined surface;

[0075] The first surface of the first upper mold is located on one side of the first lower support block 1122 and is parallel to the first surface of the first lower support block;

[0076] The angle between the first surface of the first upper mold and the inclined surface of the first upper mold is a preset angle. In this embodiment, the preset angle is 45°.

[0077] The second lower mold 122 includes: a second lower support block 1221, and a cut-off support block 1222;

[0078] The second lower support block 1221 includes at least a first surface of the second lower support block, and the cut-off support block 1222 includes at least a first surface of the cut-off support block; the first surface of the second lower support block is parallel to the first surface of the cut-off support block.

[0079] The second lower support block 1221 has a second chamfer on the side that contacts the beveled surface. When the mold is closed, the distance between the first chamfer and the second chamfer is a second preset distance. The second preset distance is set according to the following conditions: when the material thickness T>0.5mm, the second preset distance is (T-0.1)mm; when the material thickness T≤0.5mm, the second preset distance is (T-0.05)mm.

[0080] In this embodiment, the thickness of the sheet metal part to be punched is 1.2mm, and according to the above conditions, the second preset distance is 1.1mm.

[0081] The second upper mold 121 includes at least the first surface of the second upper mold;

[0082] The first surface of the second upper mold is located on one side of the cut-off support block 1222 and is parallel to the first surface of the cut-off support block.

[0083] The upper back pressure die 131 includes at least a first surface of the upper back pressure die, and the lower back pressure die 132 includes at least a first surface of the lower back pressure die.

[0084] The first surface of the upper back pressure die is parallel to the first surface of the lower back pressure die;

[0085] When the mold is closed, the distance between the first surface of the upper mold and the first surface of the lower mold is the third preset distance. The third preset distance is set according to the following conditions: when the material thickness T>0.5mm, the third preset distance is (T-0.1)mm; when the material thickness T≤0.5mm, the third preset distance is (T-0.05)mm.

[0086] In this embodiment, the thickness of the sheet metal part to be punched is 1.2mm, and according to the above conditions, the third preset distance is 1.1mm.

[0087] In another embodiment, a sheet metal rectangular hole punching device, such as Figure 7 As shown. The equipment includes: a progressive die for stamping rectangular holes in sheet metal parts as described in the first aspect above, used to manufacture rectangular holes in sheet metal parts to be punched by a stamping process.

[0088] The following stations are set sequentially in the direction of the conveyor belt travel: the first station, the second station, and the third station;

[0089] The first station is equipped with a cutting sub-mold. When the cutting sub-mold is closed, a cut is made at the preset position of the sheet metal part to be punched, and the part of the material that contacts the cut and the bevel of the cut head is bent to form a cutting plane and a cutting bevel distributed on both sides of the cut.

[0090] The second workstation is equipped with a cutting sub-mold. When the cutting sub-mold is closed, the material at the fourth preset distance from the cut is cut off on the cutting plane.

[0091] The third station is equipped with a back pressure mold. When the back pressure mold is closed, it flattens the bent beveled part of the cut to form a rectangular hole.

[0092] The progressive die includes: a shearing sub-die 11, a cutting sub-die 12, and a back pressure sub-die 13;

[0093] The cutting die 11 includes: a first upper die 111, and a first lower die 112 adapted to the first upper die; the cutting head of the first upper die is wedge-shaped, such as... Figure 4 As shown.

[0094] When the shearing sub-die 11 closes, a cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut. When the die closes, the tip of the cutter of the first upper die 111 drops 2mm below the level of the first lower die 112.

[0095] The cutting sub-mold 12 includes: a second upper mold 121, and a second lower mold 122 adapted to the second upper mold; the second upper mold has a first chamfer on the side that contacts the beveled surface of the cut, such as... Figure 5 As shown.

[0096] When the sub-mold 12 is closed, the material 0.6 mm away from the cut is removed from the cut plane;

[0097] The back pressure die 13 includes: a back pressure upper die, and a back pressure lower die 132 adapted to the back pressure upper die 131, such as... Figure 6 As shown.

[0098] When the back pressure die 13 is closed, the bent beveled part is flattened to form a rectangular hole.

[0099] The first lower mold 112 includes: a bending lower support block 1121 and a first lower support block 1122;

[0100] The bending lower support block 1121 includes at least a bending lower support block first surface, and the first lower support block 1122 includes at least a first lower support block first surface; the bending lower support block first surface is parallel to the first lower support block first surface.

[0101] The distance between the first surface of the bent lower support block and the first surface of the first lower support block is greater than 3.6mm.

[0102] The first upper mold 111 includes at least: a first upper mold first surface and a first upper mold inclined surface;

[0103] The first surface of the first upper mold is located on one side of the first lower support block 1122 and is parallel to the first surface of the first lower support block;

[0104] The angle between the first surface of the first upper mold and the inclined surface of the first upper mold is 45°.

[0105] The second lower mold 122 includes: a second lower support block 1221, and a cut-off support block 1222;

[0106] The second lower support block 1221 includes at least a first surface of the second lower support block, and the cut-off support block 1222 includes at least a first surface of the cut-off support block; the first surface of the second lower support block is parallel to the first surface of the cut-off support block.

[0107] The second lower support block 1221 has a second chamfer on the side that contacts the beveled surface of the cut. When the mold is closed, the distance between the first chamfer and the second chamfer is 1.1mm.

[0108] The second upper mold 121 includes at least the first surface of the second upper mold;

[0109] The first surface of the second upper mold is located on one side of the cut-off support block 1222 and is parallel to the first surface of the cut-off support block.

[0110] The upper back pressure die 131 includes at least a first surface of the upper back pressure die, and the lower back pressure die 132 includes at least a first surface of the lower back pressure die.

[0111] The first surface of the upper back pressure die is parallel to the first surface of the lower back pressure die;

[0112] When the mold is closed, the distance between the first surface of the upper mold and the first surface of the lower mold is 1.1mm.

[0113] The equipment also includes: an upper support plate 201, a limiting post 202, an upper pad plate 203, an upper clamping plate 204, a backing plate 205, a stripping plate 206, a lower template 207, a lower pad plate 208, a lower mold base 209, a lower corner pad 210, a lower pad plate 211, a template guide post 212, and a mold base guide post 213, etc. Figure 7 As shown.

[0114] In addition, the equipment also includes: Figure 8 The positioning pins shown are used to fix the position of the sheet metal part to be punched by engaging the positioning holes on the strip. The positioning pins are located on part 206 of the stripper plate. The positioning pins are spaced 36mm apart. Along the direction of the strip's movement, there is a row of positioning holes on each side of the strip, with a spacing of 36mm between the positioning holes, corresponding to the positions of the positioning pins.

[0115] In another embodiment, a method for stamping rectangular holes in sheet metal parts involves using the aforementioned stamping equipment to create rectangular holes in the sheet metal part to be punched, such as... Figure 9 As shown, the method includes:

[0116] S10: The sheet metal part to be punched placed on the material strip is sent to the first station for punching. A cut is made at the preset position of the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut.

[0117] S20: Send the sheet metal part to be punched to the second station for punching. On the cutting plane, cut off the material at the fourth preset distance from the cutting.

[0118] S30: Send the sheet metal part to be punched to the third station, close the back pressure mold located at the third station, flatten the bent cut bevel part to form a rectangular hole.

[0119] In another embodiment, S10: The sheet metal part to be punched, placed on the strip, is sent to the first station for punching. A cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut. Specifically, this includes:

[0120] S101: The sheet metal part to be punched, placed on the material strip, is sent to the first station. The positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched. The positioning pin and the positioning hole are used together to fix the sheet metal part to be punched.

[0121] S102: Close the shearing sub-mold, create a cut at the preset position of the sheet metal part to be punched, and bend the part of the material that contacts the cut and the bevel of the cut head to form a cut plane and a cut bevel distributed on both sides of the cut.

[0122] S103: Separate the shearing sub-die to advance the sheet metal part to be punched on the strip to the next station.

[0123] S20: The sheet metal part to be punched is sent to the second station for punching. On the cutting plane, the material at a fourth preset distance from the cutting edge is removed, specifically including:

[0124] S201: The sheet metal part to be punched, placed on the material strip, is sent to the second station. The positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched.

[0125] S202: Close the cut-off sub-mold and cut off the material at the cut plane at a fourth preset distance from the cut; in this embodiment, the fourth preset distance is 0.6mm.

[0126] S203: Separate the cutting sub-die to advance the sheet metal part to be punched on the strip to the next station.

[0127] All of the above-mentioned optional technical solutions can be combined in any way to form optional embodiments of the present invention, and will not be described in detail here.

[0128] Example 1

[0129] The following is combined with Figure 4-6 This paper describes a progressive die for stamping rectangular holes in sheet metal parts. The progressive die includes: a shearing sub-die 11, a cutting sub-die 12, and a back pressing sub-die 13.

[0130] The cutting die 11 includes: a first upper die 111, and a first lower die 112 adapted to the first upper die; the cutting head of the first upper die is wedge-shaped, such as... Figure 4 As shown.

[0131] When the shearing sub-die 11 closes, a cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut. When the die closes, the tip of the cutter of the first upper die 111 falls 2mm below the horizontal plane of the first lower die 112.

[0132] The cutting sub-mold 12 includes: a second upper mold 121, and a second lower mold 122 adapted to the second upper mold; the second upper mold has a first chamfer on the side that contacts the beveled surface of the cut, such as... Figure 5 As shown.

[0133] When the sub-mold 12 is closed, the material at the fourth preset distance from the cut is removed on the cutting plane;

[0134] The back pressure die 13 includes: a back pressure upper die, and a back pressure lower die 132 adapted to the back pressure upper die 131, such as... Figure 6 As shown.

[0135] When the back pressure die 13 is closed, the bent beveled part is flattened to form a rectangular hole.

[0136] The first lower mold 112 includes: a bending lower support block 1121 and a first lower support block 1122;

[0137] The bending lower support block 1121 includes at least a bending lower support block first surface, and the first lower support block 1122 includes at least a first lower support block first surface; the bending lower support block first surface is parallel to the first lower support block first surface.

[0138] The distance between the first surface of the bent lower support block and the first surface of the first lower support block is greater than a first preset distance of 3.6mm.

[0139] The first upper mold 111 includes at least: a first upper mold first surface and a first upper mold inclined surface;

[0140] The first surface of the first upper mold is located on one side of the first lower support block 1122 and is parallel to the first surface of the first lower support block;

[0141] The angle between the first surface of the first upper mold and the inclined surface of the first upper mold is 45°.

[0142] The second lower mold 122 includes: a second lower support block 1221, and a cut-off support block 1222;

[0143] The second lower support block 1221 includes at least a first surface of the second lower support block, and the cut-off support block 1222 includes at least a first surface of the cut-off support block; the first surface of the second lower support block is parallel to the first surface of the cut-off support block.

[0144] The second lower support block 1221 has a second chamfer on the side that contacts the beveled surface of the cut. When the mold is closed, the distance between the first chamfer and the second chamfer is 1.1mm.

[0145] The second upper mold 121 includes at least the first surface of the second upper mold;

[0146] The first surface of the second upper mold is located on one side of the cut-off support block 1222 and is parallel to the first surface of the cut-off support block.

[0147] The upper back pressure die 131 includes at least a first surface of the upper back pressure die, and the lower back pressure die 132 includes at least a first surface of the lower back pressure die.

[0148] The first surface of the upper back pressure die is parallel to the first surface of the lower back pressure die;

[0149] When the mold is closed, the distance between the first surface of the upper mold and the first surface of the lower mold is 1.1mm.

[0150] Example 2

[0151] The following is combined with Figure 7 8. Describes a sheet metal rectangular hole punching equipment, such as Figure 7 As shown. The equipment includes: a progressive die for stamping rectangular holes in sheet metal parts as described in the first aspect above, used to manufacture rectangular holes in sheet metal parts to be punched by a stamping process.

[0152] The following stations are set sequentially in the direction of the conveyor belt travel: the first station, the second station, and the third station;

[0153] The first station is equipped with a cutting sub-mold. When the cutting sub-mold is closed, a cut is made at the preset position of the sheet metal part to be punched, and the part of the material that contacts the cut and the bevel of the cut head is bent to form a cutting plane and a cutting bevel distributed on both sides of the cut.

[0154] The second workstation is equipped with a cutting sub-mold. When the cutting sub-mold is closed, the material at the fourth preset distance from the cut is cut off on the cutting plane.

[0155] The third station is equipped with a back pressure mold. When the back pressure mold is closed, it flattens the bent beveled part of the cut to form a rectangular hole.

[0156] The progressive die includes: a shearing sub-die 11, a cutting sub-die 12, and a back pressure sub-die 13;

[0157] The cutting die 11 includes: a first upper die 111, and a first lower die 112 adapted to the first upper die; the cutting head of the first upper die is wedge-shaped, such as... Figure 4 As shown.

[0158] When the shearing sub-die 11 closes, a cut is made at a preset position on the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut. When the die closes, the tip of the cutter of the first upper die 111 drops 2mm below the level of the first lower die 112.

[0159] The cutting sub-mold 12 includes: a second upper mold 121, and a second lower mold 122 adapted to the second upper mold; the second upper mold has a first chamfer on the side that contacts the beveled surface of the cut, such as... Figure 5 As shown.

[0160] When the sub-mold 12 is closed, the material 0.6 mm away from the cut is removed from the cut plane;

[0161] The back pressure die 13 includes: a back pressure upper die, and a back pressure lower die 132 adapted to the back pressure upper die 131, such as... Figure 6 As shown.

[0162] When the back pressure die 13 is closed, the bent beveled part is flattened to form a rectangular hole.

[0163] The first lower mold 112 includes: a bending lower support block 1121 and a first lower support block 1122;

[0164] The bending lower support block 1121 includes at least a bending lower support block first surface, and the first lower support block 1122 includes at least a first lower support block first surface; the bending lower support block first surface is parallel to the first lower support block first surface.

[0165] The distance between the first surface of the bent lower support block and the first surface of the first lower support block is greater than 3.6mm.

[0166] The first upper mold 111 includes at least: a first upper mold first surface and a first upper mold inclined surface;

[0167] The first surface of the first upper mold is located on one side of the first lower support block 1122 and is parallel to the first surface of the first lower support block;

[0168] The angle between the first surface of the first upper mold and the inclined surface of the first upper mold is 45°.

[0169] The second lower mold 122 includes: a second lower support block 1221, and a cut-off support block 1222;

[0170] The second lower support block 1221 includes at least a first surface of the second lower support block, and the cut-off support block 1222 includes at least a first surface of the cut-off support block; the first surface of the second lower support block is parallel to the first surface of the cut-off support block.

[0171] The second lower support block 1221 has a second chamfer on the side that contacts the beveled surface of the cut. When the mold is closed, the distance between the first chamfer and the second chamfer is 1.1mm.

[0172] The second upper mold 121 includes at least the first surface of the second upper mold;

[0173] The first surface of the second upper mold is located on one side of the cut-off support block 1222 and is parallel to the first surface of the cut-off support block.

[0174] The upper back pressure die 131 includes at least a first surface of the upper back pressure die, and the lower back pressure die 132 includes at least a first surface of the lower back pressure die.

[0175] The first surface of the upper back pressure die is parallel to the first surface of the lower back pressure die;

[0176] When the mold is closed, the distance between the first surface of the upper mold and the first surface of the lower mold is 1.1mm.

[0177] The equipment also includes: an upper support plate 201, a limiting post 202, an upper pad plate 203, an upper clamping plate 204, a backing plate 205, a stripping plate 206, a lower template 207, a lower pad plate 208, a lower mold base 209, a lower corner pad 210, a lower pad plate 211, a template guide post 212, and a mold base guide post 213, etc. Figure 7 As shown.

[0178] In addition, the equipment also includes: Figure 8 The positioning pins shown are used to fix the position of the sheet metal part to be punched by engaging the positioning holes on the strip. The positioning pins are located on part 206 of the stripper plate. The positioning pins are spaced 36mm apart. Along the direction of the strip's movement, there is a row of positioning holes on each side of the strip, with a spacing of 36mm between the positioning holes, corresponding to the positions of the positioning pins.

[0179] Example 3

[0180] The following is combined Figure 9 A method for manufacturing rectangular holes in sheet metal parts by stamping is described. The method utilizes the aforementioned stamping equipment to manufacture rectangular holes in the sheet metal part to be punched. The method includes:

[0181] S10: The sheet metal part to be punched placed on the material strip is sent to the first station for punching. A cut is made at the preset position of the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut.

[0182] S20: Send the sheet metal part to be punched to the second station for punching. On the cutting plane, cut off the material at the fourth preset distance from the cutting.

[0183] S30: Send the sheet metal part to be punched to the third station, close the back pressure mold located at the third station, flatten the bent cut bevel part to form a rectangular hole.

[0184] Example 4

[0185] The methods include:

[0186] S10: The sheet metal part to be punched placed on the material strip is sent to the first station for punching. A cut is made at the preset position of the sheet metal part to be punched, and the part of the material in contact with the bevel of the cut is bent to form a cut plane and a cut bevel distributed on both sides of the cut.

[0187] S101: The sheet metal part to be punched, placed on the material strip, is sent to the first station. The positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched. The positioning pin and the positioning hole are used together to fix the sheet metal part to be punched.

[0188] S102: Close the shearing sub-mold, create a cut at the preset position of the sheet metal part to be punched, and bend the part of the material that contacts the cut and the bevel of the cut head to form a cut plane and a cut bevel distributed on both sides of the cut.

[0189] S103: Separate the shearing sub-die to advance the sheet metal part to be punched on the strip to the next station.

[0190] S20: Send the sheet metal part to be punched to the second station for punching. On the cutting plane, cut off the material at the fourth preset distance from the cutting.

[0191] S201: The sheet metal part to be punched, placed on the material strip, is sent to the second station. The positioning pin is inserted into the positioning hole set in the material strip to position the sheet metal part to be punched.

[0192] S202: Close the cut-off sub-mold and cut off the material at the cut plane at a fourth preset distance from the cut; in this embodiment, the fourth preset distance is 0.6mm.

[0193] S203: Separate the cutting sub-die to advance the sheet metal part to be punched on the strip to the next station.

[0194] S30: Send the sheet metal part to be punched to the third station, close the back pressure mold located at the third station, flatten the bent cut bevel part to form a rectangular hole.

[0195] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program loaded on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from memory, or installed from ROM. When the computer program is executed by an external processor, it performs the functions defined in the methods of embodiments of this application.

[0196] It should be noted that the computer-readable medium in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the embodiments of this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the embodiments of this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (Radio Frequency), etc., or any suitable combination thereof.

[0197] The aforementioned computer-readable medium may be included in the aforementioned server; or it may exist independently and not assembled into the server. The aforementioned computer-readable medium carries one or more programs that, when executed by the server, cause the server to: in response to detecting that the peripheral mode of the terminal is not activated, acquire the frame rate of the application on the terminal; when the frame rate meets the screen-off condition, determine whether the user is acquiring the terminal's screen information; and in response to the determination that the user is not acquiring the terminal's screen information, control the screen to enter an immediate dimming mode.

[0198] Computer program code for performing the operations of the embodiments of this application can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages—such as Java, Smalltalk, and C++—and conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0199] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0200] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

[0201] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A progressive die for stamping rectangular holes in sheet metal parts, characterized in that, The progressive die comprises a shearing sub-die, a cutting sub-die and a back pressure sub-die; The shearing sub-die comprises a first upper die and a first lower die matched with the first upper die; the cutting edge of the first upper die is wedge-shaped; When the shearing sub-die is closed, a cut is made at a preset position of the sheet metal part to be punched, and the material in contact with the inclined surface of the cutting edge is bent to form a cut plane and a cut inclined surface distributed on both sides of the cut; The cutting sub-die comprises a second upper die and a second lower die matched with the second upper die; the second upper die is provided with a first chamfer on the side in contact with the cut inclined surface; When the cutting sub-die is closed, the material at a fourth preset distance from the cut is cut off on the cut plane; The back pressure sub-die comprises a back pressure upper die and a back pressure lower die matched with the back pressure upper die; When the back pressure sub-die is closed, the bent cut inclined surface is flattened to form a rectangular hole.

2. The stamping progressive die for a rectangular hole of a sheet metal part according to claim 1, wherein The first lower die comprises a bending lower support block and a first lower support block; The bending lower support block comprises at least a first face of the bending lower support block, and the first lower support block comprises at least a first face of the first lower support block; the first face of the bending lower support block is parallel to the first face of the first lower support block; The first face of the bending lower support block is at a first preset distance from the first face of the first lower support block.

3. The stamping progressive die for a rectangular hole of a sheet metal part according to claim 2, wherein The first upper die comprises at least a first face of the first upper die and an inclined surface of the first upper die; The first face of the first upper die is provided on one side of the first lower support block and is parallel to the first face of the first lower support block; The included angle between the first face of the first upper die and the inclined surface of the first upper die is a preset included angle.

4. The stamping progressive die for rectangular hole of sheet metal part according to claim 1, characterized in that, The second lower die comprises a second lower support block and a cutting support block; The second lower support block comprises at least a first face of the second lower support block, and the cutting support block comprises at least a first face of the cutting support block; the first face of the second lower support block is parallel to the first face of the cutting support block; The second lower support block is provided with a second chamfer on the side in contact with the cut inclined surface; when the die is closed, the first chamfer and the second chamfer are at a second preset distance.

5. The stamping progressive die for a rectangular hole of a sheet metal part according to claim 4, wherein The second upper die comprises at least a first face of the second upper die; The first face of the second upper die is provided on one side of the cutting support block and is parallel to the first face of the cutting support block.

6. The stamping progressive die for rectangular hole of sheet metal part according to claim 1, characterized in that, The back pressure upper die comprises at least a first face of the back pressure upper die, and the back pressure lower die comprises at least a first face of the back pressure lower die; The first face of the back pressure upper die is parallel to the first face of the back pressure lower die; When the die is closed, the first face of the back pressure upper die is at a third preset distance from the first face of the back pressure lower die.

7. A rectangular hole punching apparatus for sheet metal parts, characterized by, The device comprises the progressive die for punching a rectangular hole in a sheet metal part according to any one of claims 1-6, and is used for manufacturing a rectangular hole in a sheet metal part to be punched by a punching process; the device comprises a first station, a second station and a third station arranged in sequence in the direction in which the material belt advances. The first station is provided with a shearing sub-mold, when the shearing sub-mold is closed, a notch is made at a preset position of the sheet metal part to be punched, and the material in contact with the inclined surface of the tool head is bent to form a notch plane and a notch inclined surface distributed on both sides of the notch; The second station is provided with a cutting sub-mold, when the cutting sub-mold is closed, the material at a fourth preset distance from the notch is cut off at the notch plane; The third station is provided with a back pressure sub-mold, when the back pressure sub-mold is closed, the bent notch inclined surface is flattened to form a rectangular hole.

8. A method for punching a rectangular hole in a sheet metal member using the punching apparatus for a rectangular hole in a sheet metal member according to claim 7, wherein a rectangular hole is punched in a sheet metal member to be punched. The method comprises: sending the sheet metal part to be punched placed on the material belt to the first station for stamping, making a notch at a preset position of the sheet metal part to be punched, and bending the material in contact with the inclined surface of the tool head to form a notch plane and a notch inclined surface distributed on both sides of the notch; sending the sheet metal part to be punched to the second station for stamping, cutting off the material at a fourth preset distance from the notch at the notch plane; sending the sheet metal part to be punched to the third station, closing the back pressure sub-mold at the third station, flattening the bent notch inclined surface to form a rectangular hole.

9. The method of claim 8, wherein, The method comprises: sending the sheet metal part to be punched placed on the material belt to the first station, inserting a positioning needle into a positioning hole provided on the material belt to position the sheet metal part to be punched, wherein the positioning needle and the positioning hole are used in cooperation to fix the sheet metal part to be punched; closing the shearing sub-mold to make a notch at a preset position of the sheet metal part to be punched, and bending the material in contact with the inclined surface of the tool head to form a notch plane and a notch inclined surface distributed on both sides of the notch; opening the shearing sub-mold to advance the sheet metal part to be punched placed on the material belt to the next station.

10. The method of claim 9, wherein, The method comprises: sending the sheet metal part to be punched placed on the material belt to the second station, inserting a positioning needle into a positioning hole provided on the material belt to position the sheet metal part to be punched; closing the cutting sub-mold to cut off the material at a fourth preset distance from the notch at the notch plane; opening the cutting sub-mold to advance the sheet metal part to be punched placed on the material belt to the next station.

Images