Stamping die for stainless steel angle iron continuous die

Abstract

The utility model relates to the technical field of hardware stamping dies, in particular to a stainless steel angle iron progressive die stamping die which comprises a machine table, an upper die base and a lower die base. The upper die base is provided with an upper padding plate, an upper clamping plate, a stopping plate, a stripper plate, a bending forming cutter and a pre-bending forming block. The lower die base is provided with a lower die plate, a lower base plate and a plurality of machining inserts. The machining inserts comprise the first surface treatment insert, the shaping insert, the nicking insert, the second surface treatment insert, the forming insert and the separating insert. According to the utility model, the stripper plate is matched with the first surface treatment insert, the shaping insert, the nicking insert and the second surface treatment insert, the forming insert is matched with the pre-bending forming block and the bending forming cutter, and the stripper plate is matched with the separation insert, so that a workpiece is machined and formed at one time and is separated from a rolled strip material, the stamping precision and efficiency of the workpiece are improved, and the production cost is reduced. And the situations of workpiece mixing and die damage are reduced, and the die cost and the equipment investment cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware stamping dies, in particular to a continuous die stamping die for stainless steel angle irons. Background Technique

[0002] For stamping a connecting angle iron workpiece made of stainless steel, the workpiece is required to be a left-right symmetric part with a material thickness of 1.5 mm. The workpiece features two semi-shear convex points, an oval hole, a 90-degree bend, four screw thread bottom holes on two surfaces, an edge notch and a rounded corner trimming. The maximum outer size of the workpiece is 22*11*8 mm. By decomposing the process through the unfolding of the workpiece, three sets of single punching dies are required for processing such as blanking, punching and trimming, and bending.

[0003] For such connecting angle iron workpieces with small size and many features, using single punching dies, repeated positioning stamping results in poor dimensional accuracy, inconvenient picking and placing of small workpieces, low efficiency in multiple processes, easy mixing of workpieces and damage to the die. When processing, multiple sets of dies need to be put into use simultaneously, with high die costs and high equipment input costs. Therefore, it is necessary to make improvements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a continuous die stamping die for stainless steel angle irons in view of the deficiencies of the prior art. During the stamping process, the upper die base is driven by a driving member to approach the lower die base. Through the cooperation of the stripper plate with the first surface treatment insert, the shaping insert, the scoring insert, and the second surface treatment insert, the strip material completes processes such as punching, pressing characters and marks, trimming, deburring and pressing concave. The forming insert, the pre-bending forming block and the bending forming knife cooperate to enable the workpiece in the strip material to complete the pre-bending and bending processes. The stripper plate and the separating insert cooperate to flatten the workpiece in the strip material and separate the workpiece from the coiled strip material, realizing the one-time processing and forming of the workpiece and separating it from the coiled strip material, improving the dimensional accuracy and stamping efficiency of the workpiece, preventing the mixing of workpieces and the damage of the die, and reducing the die cost and equipment input cost.

[0005] To achieve the above purpose, a continuous die stamping die for stainless steel angle irons of the utility model includes a feeder, an upper die base and a lower die base,

[0006] The feeder is provided with a feeding pitch;

[0007] At the bottom of the upper die base, an upper backing plate, an upper clamping plate, a stop plate and a stripper plate are sequentially arranged from top to bottom;

[0008] A bending forming knife is penetrated through the upper backing plate, the upper clamping plate, the stop plate and the stripper plate;

[0009] The stripper plate is provided with a pre-bending forming block;

[0010] At the top of the lower die base, a lower template and a lower backing plate are sequentially arranged from bottom to top;

[0011] A plurality of processing inserts are arranged in the lower template, and the plurality of processing inserts include a first surface treatment insert, a shaping insert, a scoring insert, a second surface treatment insert, a forming insert, and a separating insert.

[0012] Preferably, the first surface treatment insert includes a first punching part and a second punching part.

[0013] A character or logo is pressed on the surface of the strip material by the cooperation of the character pressing mark part on the first punching part and the stripper plate.

[0014] The first punching part and the stripper plate cooperate to punch a stepping positioning hole in the strip material.

[0015] The second punching part and the stripper plate cooperate to punch a processing positioning hole in the strip material.

[0016] Preferably, the feeder is provided with a pitch hole, and the pitch hole and the stepping positioning hole cooperate to facilitate the feeder to control the feeding pitch.

[0017] Preferably, the shaping insert includes a third punching part, and the third punching part and the stripper plate cooperate to cut the strip material.

[0018] Preferably, the scoring insert includes a cutting part, and the strip material is semi-sheared by the cutting part.

[0019] Preferably, the second surface treatment insert includes a deburring part and a dimpling part.

[0020] The deburring part and the stripper plate cooperate to remove the burrs generated by punching, trimming or semi-shearing.

[0021] The dimpling part and the stripper plate cooperate to press a groove or shape on the surface of the workpiece.

[0022] Preferably, the forming insert includes a pre-bending part, a bending part and a flattening part.

[0023] The pre-bending part and the pre-bending forming block cooperate to perform a preliminary bend on the workpiece.

[0024] The bending part and the bending forming tool cooperate to perform an accurate bend on the workpiece.

[0025] The flattening part and the stripper plate cooperate to correct the warping or unevenness of the workpiece.

[0026] Preferably, the separating insert includes a blank step part, a scribing part and a separating part.

[0027] The empty-step part and the stripper plate cooperate to coordinate the rhythm between different processes;

[0028] The stripper plate and the scribing part cooperate to form cutting scribing lines on the surface of the workpiece;

[0029] The stripper plate and the separating part cooperate to cut the workpiece from the strip.

[0030] Preferably, ejector pins are arranged through the upper clamping plate and the stop plate, the stripper plate is provided with guide holes for the ejector pins to pass through, and the ejector pins are exposed outside the stripper plate through the guide holes for the ejector pins.

[0031] Preferably, the lower template is provided with floating pins, inner guide columns, template positioning pins, strip floating pins and limit columns;

[0032] The floating pin abuts against the stripper plate;

[0033] The stripper plate is slidably connected with the inner guide column;

[0034] The stripper plate or the lower backing plate is provided with positioning holes;

[0035] The strip floating pin abuts against the strip;

[0036] The limit column abuts against the stripper plate.

[0037] The beneficial effects of the present utility model: During the stamping process, the driving part drives the upper die base to approach the lower die base, and through the cooperation of the stripper plate with the first surface treatment insert, the shaping insert, the scoring insert, and the second surface treatment insert, the strip is completed with processes such as punching, embossing, trimming, deburring, and pressing concave, etc. The shaping insert, the pre-bending forming block, and the bending forming knife cooperate to complete the pre-bending and bending processes of the workpiece in the strip. The stripper plate and the separating insert cooperate to flatten the workpiece in the strip and separate the workpiece from the coiled strip, realizing one-time processing and forming of the workpiece and separating it from the coiled strip, improving the accuracy of the stamping size of the workpiece and the stamping efficiency, preventing the occurrence of workpiece mixing and mold damage, and reducing the mold cost and equipment investment cost. Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of the upper die base and the lower die base of the present utility model.

[0039] Figure 2 It is a schematic structural diagram of the feeder and the processing insert of the present utility model.

[0040] Figure 3 It is a schematic structural diagram of the processing insert of the present utility model.

[0041] The reference numerals include:

[0042] 1. Feeding machine; 11. Step holes

[0043] 2. Upper die holder; 21. Upper backing plate; 22. Upper clamping plate; 23. Stopper plate; 24. Stripping plate; 241. Pilot pin; 25. Bending forming tool; 26. Pre-bending forming block; 27. Ejector pin

[0044] 3. Lower die holder; 31. Lower template; 300. Machining insert; 32. Lower backing plate; 33. Floating pin; 34. Inner guide pillar; 35. Template positioning pin; 36. Strip floating pin; 37. Limit pillar; 39. Lower foot pad

[0045] 4. First surface treatment insert; 41. First punching part; 42. Second punching part; 43. Embossing label part

[0046] 5. Shaping insert; 51. Third punching part

[0047] 6. Scoring insert; 61. Cutting part

[0048] 7. Second surface treatment insert; 71. Deburring part; 72. Indenting part

[0049] 8. Forming insert; 81. Pre-bending part; 82. Bending part; 83. Flattening part

[0050] 9. Separating insert; 91. Empty step part; 92. Scoring part; 93. Separating part Detailed implementation mode

[0051] The following describes the present utility model in detail with reference to the accompanying drawings.

[0052] As Figures 1 to 3 shown, a continuous die stamping die for stainless steel angle iron of the present utility model includes a feeding machine 1, an upper die holder 2 and a lower die holder 3,

[0053] The feeding machine 1 is provided with a feeding step;

[0054] The bottom of the upper die holder 2 is sequentially provided with an upper backing plate 21, an upper clamping plate 22, a stopper plate 23 and a stripping plate 24 from top to bottom;

[0055] A bending forming tool 25 is penetrated through the upper backing plate 21, the upper clamping plate 22, the stopper plate 23 and the stripping plate 24;

[0056] The stripping plate 24 is provided with a pre-bending forming block 26;

[0057] The top of the lower die holder 3 is sequentially provided with a lower template 31 and a lower backing plate 32 from bottom to top;

[0058] A plurality of processing inserts 300 are arranged in the lower template 31. The plurality of processing inserts 300 include a first surface treatment insert 4, a shaping insert 5, a scoring insert 6, a second surface treatment insert 7, a forming insert 8, and a separating insert 9.

[0059] The strip material is conveyed between the upper die holder 2 and the lower die holder 3 by the feeder 1 according to the feeding pitch; the upper backing plate 21, the upper clamping plate 22, the stop plate 23, the stripper plate 24, the pre-bending forming block 26, and the bending forming knife 25 move along with the movement of the upper die holder 2.

[0060] The lower template 31, the lower backing plate 32, the first surface treatment insert 4, the shaping insert 5, the scoring insert 6, the second surface treatment insert 7, the forming insert 8, and the separating insert 9 move along with the movement of the lower die holder 3.

[0061] During the stamping process, the upper die holder 2 is driven by a driving member to approach the lower die holder 3. Through the cooperation of the stripper plate 24 with the first surface treatment insert 4, the shaping insert 5, the scoring insert 6, and the second surface treatment insert 7, the strip material completes processes such as punching, embossing, trimming, deburring, and pressing concavities. The forming insert 8, the pre-bending forming block 26, and the bending forming knife 25 cooperate to complete the pre-bending and bending processes of the workpiece in the strip material. The stripper plate 24 and the separating insert 9 cooperate to flatten the workpiece in the strip material and separate the workpiece from the coiled strip material, realizing the one-time processing and forming of the workpiece and the separation from the coiled strip material, improving the precision of the stamping size of the workpiece and the stamping efficiency, preventing the mixing of workpieces and damage to the mold, and reducing the mold cost and equipment investment cost.

[0062] At the same time, the workpiece is first pre-bent and then bent into a negative angle, effectively solving the problems of product springback and too large bending angle.

[0063] In actual use, the driving member is an 80T punching press. The stamping die is clamped and fixed on the 80T punching press, the upper die is fixed on the upper workbench, and the lower die is fixed on the lower workbench.

[0064] The feeder 1 is a servo feeder and is fixed to the side of the punching press and aligned with the feeding port of the die.

[0065] The coiled strip material is clamped on the feeding turntable. The coiled strip material passes through the flattening machine and the servo feeder and is sent to the die feeding port.

[0066] The operation signal of the servo feeder is linked and controlled with the start signal of the punching press. When the punching press completes one stamping, the feeder automatically feeds once according to the pitch. The stamping die includes at least two groups and is arranged side by side. Two symmetric workpieces are produced for the first time. Then, continue to feed and stamp in a reciprocating manner. Two symmetric workpieces can be produced every time a stamping is completed.

[0067] The strip material is electro-galvanized cold-rolled steel sheet, abbreviated as SECC, with a material thickness of 1.5 mm, a punching hole of 2.7 mm for extrusion tapping, and a positional accuracy of + / - 0.05 mm.

[0068] The bending angle of the workpiece finished product is 90 degrees, and the angle springback is accurately controlled with an accuracy of + / - 0.5 degrees.

[0069] Through the symmetric strip design, the die stamping product is one out of two, combined with the precise feeding of the servo feeder, the production efficiency reaches 30 pcs / min, and the production efficiency is increased by 60%.

[0070] With a reasonable pitch, process arrangement and strip width design, the material utilization rate is increased to 67%.

[0071] As Figures 2 to 3 shown, the first surface treatment insert 4 of this embodiment includes a first punching part 41 and a second punching part 42.

[0072] A character embossing part 43 is arranged on the first punching part 41, and the character embossing part 43 is used to cooperate with the stripper plate 24 to press characters or marks on the strip surface.

[0073] The first punching part 41 and the stripper plate 24 cooperate to punch step positioning holes in the strip.

[0074] The second punching part 42 and the stripper plate 24 cooperate to punch processing positioning holes in the strip, and the strip is conveniently positioned for processing through the processing positioning holes.

[0075] As Figures 2 to 3 shown, the feeder 1 of this embodiment is provided with pitch holes 11, and the pitch holes 11 cooperate with the step positioning holes to facilitate the feeder 1 to control the feeding pitch and ensure the consistency and accuracy of the workpiece finished product.

[0076] As Figures 2 to 3 shown, the sizing insert 5 of this embodiment includes a third punching part 51, and the third punching part 51 and the stripper plate 24 cooperate to cut the strip.

[0077] As Figures 2 to 3 shown, the scoring insert 6 of this embodiment includes a cutting part 61, and the cutting part 61 performs a semi-shearing operation on the strip to connect the workpiece to the strip, facilitating subsequent work processing and forming and separating the workpiece from the strip.

[0078] As Figures 2 to 3 shown, the second surface treatment insert 7 of this embodiment includes a deburring part 71 and a dimpling part 72;

[0079] The deburring part 71 and the stripper plate 24 cooperate to remove the burrs generated by punching, trimming or semi-shearing.

[0080] The indentation member 72 cooperates with the stripper plate 24 to press grooves or shapes on the surface of the workpiece.

[0081] As Figures 2 to 3 shown, the forming insert 8 of this embodiment includes a pre-bending member 81, a bending member 82, and a flattening member 83.

[0082] The pre-bending member 81 cooperates with the pre-bending forming block 26 to perform preliminary bending on the workpiece, preparing for subsequent precise forming.

[0083] The bending member 82 cooperates with the bending forming tool 25 to perform precise bending on the workpiece, forming the required angle or shape.

[0084] The flattening member 83 cooperates with the stripper plate 24 to correct the warping or unevenness of the workpiece, making the surface of the workpiece flat.

[0085] As Figures 2 to 3 shown, the separating insert 9 of this embodiment includes a space step member 91, a scribing member 92, and a separating member 93.

[0086] The space step member 91 cooperates with the stripper plate 24 to coordinate the rhythm between different processes.

[0087] The scribing member 92 cooperates with the stripper plate 24 to form cutting scribing lines on the surface of the workpiece, enabling accurate operations along the cutting scribing lines during subsequent processing.

[0088] The separating member 93 cooperates with the stripper plate 24 to cut the workpiece from the strip material, separating the workpiece from the coiled strip material.

[0089] The strip material passes through the first punching member 41, the second punching member 42, the third punching member 51, the blanking member 61, the deburring member 71, the indentation member 72, the pre-bending member 81, the bending member 82, the flattening member 83, the space step member 91, the scribing member 92, and the separating member 93 for processing. The stamping process is divided into 12 steps. After the punch press completes 12 times, two symmetrically left and right workpieces can be produced.

[0090] As Figure 1 shown, ejector pins 27 are arranged through the upper clamping plate 22 and the stop plate 23 of this embodiment. The stripper plate 24 is provided with guide holes 241 for the ejector pins 27 to pass through. The ejector pins 27 are exposed outside the stripper plate 24 through the guide holes 241, facilitating the separation of the strip material from the stripper plate 24.

[0091] As Figure 1As shown, the lower template 31 of this embodiment is provided with floating pins 33, inner guide pillars 34, template positioning pins 35, strip floating pins 36 and limit pillars 37.

[0092] By the floating pins 33 abutting against the stripper plate 24, it is ensured that the workpiece is accurately and stably positioned during the stamping process, while reducing the risk of wear and deformation.

[0093] The stripper plate 24 is slidably connected to the inner guide pillars 34 to ensure that the upper and lower parts of the mold remain parallel during movement, avoiding misalignment and non-centering, thereby improving the machining accuracy.

[0094] The stripper plate 24 or the lower backing plate 32 is provided with positioning holes. By the template positioning pins 35 cooperating with the positioning holes, it is convenient for positioning the stripper plate 24 and the lower template 31 or the lower backing plate 32 and the lower template 31.

[0095] The strip floating pins 36 abut against the strip. The strip floating pins 36 support the strip and keep the strip flat, preventing the strip from sagging or warping due to uneven gravity or pressure during stamping. This helps to ensure the accurate position of the strip during the stamping process, thereby improving the accuracy of the finished product.

[0096] The limit pillars 37 abut against the stripper plate 24 so that the mold closes to the set height without over-closing. This ensures the dimensional accuracy of the stamped workpiece and the normal operation of the mold.

[0097] Preferably, the bottom of the lower die base 3 is provided with lower pad feet 39. By adjusting the gap between the upper die base 2 and the lower die base 3, it is ensured that there is an appropriate gap between the upper die base 2 and the lower die base 3 so that the material can pass through smoothly and be accurately processed.

[0098] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A continuous die stamping die for stainless steel angle iron, characterized in that: It includes a feeder (1), an upper die base (2) and a lower die base (3). The feeder (1) is provided with a feeding pitch. At the bottom of the upper die base (2), an upper backing plate (21), an upper clamping plate (22), a stop plate (23) and a stripper plate (24) are sequentially arranged from top to bottom. A bending and forming tool (25) is inserted through the upper backing plate (21), the upper clamping plate (22), the stop plate (23) and the stripper plate (24). The stripper plate (24) is provided with a pre-bending and forming block (26). At the top of the lower die base (3), a lower template (31) and a lower backing plate (32) are sequentially arranged from bottom to top. A plurality of processing inserts (300) are arranged in the lower template (31). The plurality of processing inserts (300) include a first surface treatment insert (4), a sizing insert (5), a scoring insert (6), a second surface treatment insert (7), a forming insert (8) and a separating insert (9).

2. The continuous die stamping die for stainless steel angle iron according to claim 1, wherein: The first surface treatment insert (4) includes a first punching part (41) and a second punching part (42). A character embossing part (43) is arranged on the first punching part (41). The character or logo is pressed on the strip surface by the cooperation of the character embossing part (43) and the stripper plate (24). The first punching part (41) and the stripper plate (24) cooperate to punch a stepping positioning hole in the strip. The second punching part (42) and the stripper plate (24) cooperate to punch a processing positioning hole in the strip.

3. A continuous die stamping die for stainless steel angle iron according to claim 2, characterized in that: The feeder (1) is provided with a pitch hole (11). The feeding pitch is controlled by the cooperation of the pitch hole (11) and the stepping positioning hole, so as to facilitate the feeder (1) to control the feeding pitch.

4. A continuous die stamping die for stainless steel angle iron according to claim 1 or 2, characterized in that: The sizing insert (5) includes a third punching part (51). The third punching part (51) and the stripper plate (24) cooperate to cut the strip.

5. A continuous die stamping die for stainless steel angle iron according to claim 1 or 2, characterized in that: The scoring insert (6) includes a cutting part (61). The strip is semi-sheared by the cutting part (61).

6. A continuous die stamping die for stainless steel angle iron according to claim 1, characterized in that: The second surface treatment insert (7) includes a deburring part (71) and a dimpling part (72). The deburring part (71) and the stripper plate (24) cooperate to remove the burrs generated by punching, trimming or semi-shearing. The dimpling part (72) and the stripper plate (24) cooperate to press a groove or shape on the surface of the workpiece.

7. A continuous die stamping die for stainless steel angle iron according to claim 1, characterized in that: The forming insert (8) includes a pre-bending part (81), a bending part (82) and a flattening part (83). The pre-bending part (81) and the pre-bending and forming block (26) cooperate to perform a preliminary bend on the workpiece. The bending part (82) and the bending and forming tool (25) cooperate to perform an accurate bend on the workpiece. The flattening part (83) and the stripper plate (24) cooperate to correct the warping or unevenness of the workpiece.

8. A continuous die stamping die for stainless steel angle iron according to claim 1 or 2, characterized in that: The separating insert (9) includes a blank step part (91), a scribing part (92) and a separating part (93). The blank step part (91) and the stripper plate (24) cooperate to coordinate the rhythm between different processes. The scribing part (92) and the stripper plate (24) cooperate to form a cutting scribing line on the surface of the workpiece. The stripper plate (24) cooperates with the separating element (93) to cut the workpieces off the strip.

9. A continuous die stamping die for stainless steel angle iron according to claim 1 or 2, characterized in that: The upper clamping plate (22) and the stop plate (23) are provided with ejector pins (27), and the stripping plate (24) is provided with guide pins (241) for the ejector pins (27) to pass through, and the ejector pins (27) are exposed outside the stripping plate (24) through the guide pins (241).

10. A continuous die stamping die for stainless steel angle iron according to claim 1, characterized in that: The lower template (31) is provided with a floating pin (33), an inner guide column (34), a template positioning pin (35), a material floating pin (36) and a limit column (37); The floating pin (33) contacts the stripping plate (24); The stripping plate (24) is slidably connected to the inner guide pillar (34); The stripping plate (24) or the lower pad (32) is provided with a positioning hole; The belt material floating and sinking pin (36) is in conflict with the belt material; The limiting column (37) abuts against the stripping plate (24).

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