Stamping tool for flange forming of lock washer

Abstract

The utility model discloses a stamping tool for turnup forming of a lock washer, which comprises a pressing die, a positioning die and a pressing die, the positioning die and the pressing die are stacked and fixed into a whole, and each of the positioning die and the pressing die comprises a plate body part and a plurality of arc-shaped parts which are uniformly formed on the outer edge of the plate body part and extend outwards; the arc-shaped parts of the positioning mold and the pressing mold are overlapped, and a plurality of positioning grooves which extend from the plate body part to the corresponding arc-shaped parts and are used for embedding blanks are formed in one surface, facing the pressing mold, of the positioning mold; a sinking cavity which is matched with the pressing die and allows the pressing die to be embedded is formed in the pressing die, and a plurality of slopes used for blank flanging forming are formed in the portion, located on the outer edge of the sinking cavity, of the pressing die. The stamping tool can meet the requirement for arc flanging forming of a plurality of lock washers at a time, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stamping tool for stop washer flanging forming belongs to mechanical processing technical field. BACKGROUND

[0002] Stamping is the power of conventional or special stamping equipment, so that the sheet metal in the die directly receives the deformation force and deforms, thereby obtaining a product part with certain shape, size and performance. For the arc flanging of single ear stop washer, the bending machine cannot realize it. INVENTION CONTENTS

[0003] The utility model discloses a stamping tool for stop washer flanging forming can satisfy the arc flanging forming of multiple stop washers (single ear) at one time, and the production efficiency is improved.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme that:

[0005] A stamping tool for stop washer flanging forming, comprising a pressing die and a positioning die and a pressing die fixed as a whole, the positioning die and the pressing die all comprise a plate body part and a plurality of arc-shaped parts uniformly formed on the outer edge of the plate body part and extending outward; the arc-shaped parts of the positioning die and the pressing die are overlapped, and a plurality of positioning grooves for embedding the blank are formed on the side of the positioning die facing the pressing die; a sink cavity is formed on the pressing die, which is matched with the pressing die and embedded in the pressing die, and a plurality of slope surfaces for blank flanging forming are formed in the pressing die outside the sink cavity.

[0006] Preferably, a plurality of through holes are uniformly opened on the positioning die and the pressing die, and the through holes on the positioning die penetrate the positioning groove and correspond to the through holes on the blank;

[0007] The positioning die and the pressing die are fixed as a whole by the fastening assembly inserted through the corresponding through holes.

[0008] Preferably, a through hole is also opened at the center of the positioning die and the pressing die, and the fastening assembly inserted through the corresponding through hole is also provided.

[0009] Preferably, the fastening assembly comprises a bolt inserted through the corresponding through hole from the side of the positioning die or the pressing die, a washer is sleeved on the tail end of the bolt, and a nut for locking the positioning die and the pressing die is screwed.

[0010] Preferably, a relief hole corresponding to the bolt is opened on the pressing die.

[0011] Preferably, the plate body part of the positioning die and the pressing die is square or circular in cross section.

[0012] Preferably, the plate body part of the positioning die and the pressing die is square in cross section, and the arc-shaped part and the positioning groove are arranged in an array on the positioning die.

[0013] Preferably, the plate body part of the positioning die and the pressing die is circular in cross section, and the arc-shaped part and the positioning groove are uniformly distributed around the plate body part in the center of the axial center line.

[0014] Preferably, the center of the side of the positioning die where the positioning groove is formed is formed with a protrusion extending towards the pressing die, and the pressing die is formed with a sunken groove for embedding the protrusion.

[0015] Preferably, the pressing die, the positioning die and the pressing die are all made of stainless steel.

[0016] The utility model discloses beneficial effects are:

[0017] The stamping tool can clamp and flange-form a plurality of stop washers in one time, and improves production efficiency and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the three-dimensional schematic view of stamping tool;

[0019] Figure 2 It is the three-dimensional schematic view of another angle of stamping tool;

[0020] Figure 3 It is the positioning die structure schematic view;

[0021] Figure 4 It is the schematic view of placing the blank in the positioning groove;

[0022] Figure 5 It is the schematic view of the positioning die and the pressing die after being assembled after clamping the blank;

[0023] Figure 6 It is the pressing die structure schematic view;

[0024] Figure 7 It is the blank structure schematic view;

[0025] Figure 8 It is the structure schematic view of stop washer after flange-forming;

[0026] The main meaning of the figure mark in the drawing is as follows:

[0027] 1, pressing die, 2, positioning die, 3, pressing die, 4, plate body part, 5, arc-shaped part, 6, positioning groove, 7, through hole, 8, fastening assembly, 9, bolt, 10, washer, 11, nut, 12, sunken cavity, 13, slope, 14, avoiding hole. DETAILED DESCRIPTION

[0028] The following specifically introduces the present utility model in conjunction with the accompanying drawings and embodiments.

[0029] This embodiment provides a stamping tooling for flanging forming of a stop washer. As Figures 1-6 shown, it includes a pressing die 1 and a positioning die 2 and a pressing die 3 that are laminated and fixed together. The pressing die 1, the positioning die 2, and the pressing die 3 are all austenitic stainless steel parts to ensure the strength of the tooling. Both the positioning die 2 and the pressing die 3 include a plate body part 4 with a circular cross-section and 12 arc-shaped parts 5 that are evenly distributed on the periphery of the plate body part 4 with the axial center line of the plate body part 4 as the center and extend outward. The outer contour of the arc-shaped part 5 matches the shape of the target flanging. The arc-shaped parts 5 of the positioning die 2 and the pressing die 3 overlap, and 12 positioning grooves 6 that extend from the plate body part 4 to the corresponding arc-shaped parts 5 and are used for the blank to be embedded are formed on the surface of the positioning die 2 facing the pressing die 3. Similarly, the positioning grooves 6 are also evenly distributed on the positioning die 2 with the axial center line of the plate body part 4 as the center.

[0030] Five groups of through holes 7 are correspondingly opened on the positioning die 2 and the pressing die 3. One group of through holes 7 is opened at the center of the positioning die 2 and the pressing die 3, and the other four groups of through holes 7 are evenly distributed on the plate body part 4. The four through holes 7 on the positioning die 2 at non-central positions penetrate the positioning grooves 6 and correspond to the through holes 7 on the blank.

[0031] The structure diagram of the stop washer (single ear) blank is as Figure 7 shown. The stop washer blank is placed into the positioning groove 6. The positioning groove 6 is adapted to the blank, so it cannot shift on the plane. The schematic diagram after the blank is placed is as Figure 4 shown. Then, the pressing die 3 and the positioning die 2 are fixed together by a fastening component 8 to fix the blank. The fastening component 8 includes a bolt 9, a washer 10, and a nut 11. As Figure 5 shown, the bolt 9 is inserted from the through hole 7 on the side of the pressing die 3 and passes through the through hole 7 on the side of the positioning die 2. The washer 10 is sleeved outside the tail end of the bolt 9 located outside the positioning die 2, and the nut 11 is also screwed on this end to make the washer 10 closely adhere to the positioning die 2 to lock the positioning die 2 and the pressing die 3. And, four bolts 9 will pass through the through holes 7 on four blanks. In actual application, in order to further prevent the positioning die 2 and the pressing die 3 from shifting, a protrusion (not too high) that extends towards the pressing die 3 can also be formed at the center of the surface of the positioning die 2 with the positioning groove 6, and a sunk groove for the protrusion to be embedded is formed on the pressing die 3. After the pressing die 3 is stacked on the positioning die 2, the protrusion will be embedded in the sunk groove.

[0032] After the above operations, the positioning mold 2 and the clamping mold 3 together form a lower mold assembly that clamps 12 blanks, with the workpiece ends extending out of the positioning mold 2 and the clamping mold 3. The lower mold assembly is placed entirely on the press operating table, with the positioning mold 2 positioned below. Then, the pressing mold 1 is placed on the lower mold assembly from above.

[0033] For details, see Figure 6 As shown, a recessed cavity 12 is formed on the die 1 to fit and allow the clamping die 3 to be embedded. Multiple bevels 13 for flanging the workpiece are formed within the die 1 located at the outer edge of the recessed cavity 12. The shape of the bevels 13 matches the shape of the target flanging. Additionally, five clearance holes 14 corresponding to the bolts 9 are provided on the die 1. These five clearance holes 14 allow the heads of five bolts 9 to be inserted after the die 1 is placed on the lower die assembly. Since the workpiece's end to be processed extends beyond the positioning die 2 and the clamping die 3, it supports the die 1, ensuring that the clamping die 3 is only partially embedded in the recessed cavity 12. The recessed cavity 12 is fitted to the clamping die 3 to prevent misalignment between the lower die assembly and the die 1 during the trial pressing process. After the mold 1 is placed, the press applies a vertical force to the mold 1. The slope 13 inside the mold 1 causes the end of the retaining washer to be processed to be shaped along the slope 13 and the outer contour of the arc-shaped part 5, thus completing the flanging process. The effect is shown in the figure. Figure 8 As shown.

[0034] In practical applications, the cross-section of the plate body 4 of the positioning mold 2 and the clamping mold 3 can also be square. In this case, the arc-shaped parts 5 are evenly distributed on the four sides of the square plate body 4, and then the positioning grooves 6 are formed. Similarly, the shape and structure of the clamping mold 3 and the pressing mold 1 can be processed according to the shape and structure of the positioning mold 2. The specific number of positioning grooves 6 can also be set according to requirements, and the tooling size can be enlarged or reduced as needed.

[0035] The above description is only a preferred embodiment of this utility model patent. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model patent, and these improvements and modifications should also be considered within the scope of protection of this utility model patent.

Claims

1. A stamping fixture for forming the flange of a retaining washer, characterized in that, The mold includes a positioning mold and a clamping mold that are stacked and fixed together. Both the positioning mold and the clamping mold include a plate body and multiple arc-shaped parts that are uniformly formed on the outer edge of the plate body and extend outward. The arc-shaped parts of the positioning mold and the clamping mold overlap, and multiple positioning grooves extending from the plate body to the corresponding arc-shaped parts are formed on the side of the positioning mold facing the clamping mold for inserting blanks. A cavity adapted to the clamping mold and for inserting the clamping mold is formed on the pressing mold, and multiple slopes for forming the flange of the blank are formed in the pressing mold located on the outer edge of the cavity.

2. The stamping fixture for forming the flange of the retaining washer according to claim 1, characterized in that, Multiple through holes are provided on the positioning mold and the clamping mold, and the through holes on the positioning mold penetrate the positioning groove and correspond to the through holes on the blank. The positioning mold and the clamping mold are fixed together as one unit by fastening components that pass through the corresponding through holes.

3. The stamping fixture for forming the flange of the retaining washer according to claim 2, characterized in that, A through hole is also provided at the center of the positioning mold and the clamping mold, and a fastening component is also provided that passes through the corresponding through hole.

4. The stamping fixture for forming the flange of the retaining washer according to claim 3, characterized in that, The fastening assembly includes a bolt that passes through a corresponding through hole from the side of the positioning mold or the clamping mold, with a washer sleeved on the tail end of the bolt and a nut screwed on for locking the positioning mold and the clamping mold.

5. The stamping fixture for forming the flange of the retaining washer according to claim 4, characterized in that, The die has clearance holes corresponding to the bolts.

6. The stamping fixture for forming the flange of the retaining washer according to claim 1, characterized in that, The cross-section of the plate body of the positioning mold and the clamping mold is square or circular.

7. The stamping fixture for forming the flange of the retaining washer according to claim 6, characterized in that, The plate body of the positioning mold and the clamping mold has a square cross-section, and the arc-shaped parts and positioning grooves are distributed in an array on the positioning mold.

8. The stamping fixture for forming the flange of the retaining washer according to claim 6, characterized in that, The plate body of the positioning mold and the clamping mold has a circular cross-section, and the arc-shaped part and the positioning groove are evenly distributed around the positioning mold with the axial center line of the plate body as the center.

9. The stamping fixture for forming the flange of the retaining washer according to claim 1, characterized in that, The center of the side of the positioning mold with the positioning groove has a protrusion extending toward the clamping mold, and a recessed groove is formed on the clamping mold for the protrusion to be inserted.

10. The stamping fixture for forming the flange of the retaining washer according to claim 1, characterized in that, The pressing mold, positioning mold, and clamping mold are all made of stainless steel.

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