Disc-shaped belt ear piece transfer die capable of saving width of material belt

Abstract

The utility model belongs to the technical field of metal stamping, and relates to a disc-shaped belt ear piece transfer die capable of saving the width of a material belt, which comprises a feeding guide groove, a feeding punching unit, a rotating unit, a raising unit and a punching trimming unit which are arranged along the conveying direction of the material belt, the working sections of the feeding and punching unit, the rotating unit, the raising unit and the punching and trimming unit are conveyed to the next working station by adopting the stepping conveying unit; the feeding and punching unit is used for cutting a blank with a disc-shaped lug piece on a material belt, the cutting part is a waste area, an included angle of 30-60 degrees is formed between the symmetry axis of the blank and the conveying direction of the material belt, and the rotating unit is used for rotating the blank to an angle that the symmetry axis is perpendicular to the conveying direction of the material belt. Under the condition that the stepping distance is not affected, more materials in the direction of the waste material area can be utilized at the position where the lug part is located, the width needed by the material belt is not the length of the symmetry axis of the blank, the symmetry axis serves as a right-angle side of the bevel edge, and therefore the width of the material belt can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal stamping, in particular to a disc-shaped belt ear piece transfer die which saves the width of a material strip. Background Art

[0002] Metal stamping is a common process for processing many metal products. As customer needs become more diverse, mold design must also meet various product requirements.

[0003] Figure 1 The disc-shaped ear piece 1 in the figure has an annular surface 11, a disc-shaped portion 12 and two ears 13. The disc-shaped portion 12 is located on the inner side of the annular surface 11 and arches upward. The center of the disc-shaped portion 12 has a middle hole 121, and a number of through holes 122 are provided around the middle hole 121. The two ears 12 are symmetrically located at both ends of the diameter of the annular surface 11, and the height of the ears 12 decreases as they go outward. The entire disc-shaped ear piece 1 is punched from a strip of material with a thickness of about 2 mm. In consideration of the uniformity of thickness, the height of the annular surface 11 is generally used as the reference plane. If the continuous die stamping method is used, the ears 12 are deformed downward from the planar structure. It is difficult to make a curved transition with a strip of material of this thickness, so a transfer die is usually used for continuous stamping. According to common sense, the transfer die should clamp the ears 11 from both sides, and then place them in the next station for punching.

[0004] Our company has applied for a utility model patent, CN113997010B, for a method for preventing cracking in high-strength sheet metal workpieces. This process manufactures this disc-shaped ear piece 1. However, this patent only covers the forming process from the blank to the final structure, thereby improving product precision. However, it does not consider how to reduce raw material costs. If the ears 12 are placed on both sides of the material strip, a large amount of material will be wasted on both sides, which not only increases the material strip cost but also generates more punching waste, a problem that is more serious for thick material.

[0005] Therefore it is necessary to develop a new mold to solve the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a disc-shaped belt ear piece transfer die which saves the width of the material strip, so that the layout of the disc-shaped belt ear piece on the material strip can save the width of the material strip.

[0007] The utility model achieves the above-mentioned object through the following technical solutions: a disc-shaped belt ear piece transfer die that saves the width of the material strip, used for processing the disc-shaped belt ear piece, the disc-shaped belt ear piece having an annular face, a disc-shaped portion and two ears, the disc-shaped portion is located inside the annular face and arches upward, the center of the disc-shaped portion has a middle hole, a plurality of through holes are provided around the middle hole, and the two ears are symmetrically located at the two ends of the diameter of the annular face;

[0008] The disc-shaped belt ear piece transfer die includes a feed guide groove, a feed punching unit, a rotation unit, a embossing unit and a punching and trimming unit arranged along the conveying direction of the material belt, and the feed punching unit, the rotation unit, the embossing unit and the punching and trimming unit are all transported to the next station by a stepping conveying unit;

[0009] The feed punching unit is used to cut out the blank of the disc-shaped belt ear piece on the material strip, and the cut-off part is the waste area. The symmetry axis of the blank is at an angle of 30-60° to the conveying direction of the material strip. The rotating unit is used to rotate the blank to an angle where the symmetry axis is perpendicular to the conveying direction of the material strip.

[0010] Specifically, the rotating unit includes a support, a second positioning boss located at the center of the support, a limit pin located on one side of the support, a stop block located on the other side of the support, and a movable hitting block located on the third side of the support. The limit pin limits the initial rotation angle of the blank on the second positioning boss, and the movable hitting block contacts one ear preform part to bring the ear preform part close to the stop block while moving the other ear preform part away from the limit pin until the axis of the blank is perpendicular to the conveying direction of the material belt.

[0011] Furthermore, the rotating unit has an upper die and a lower die, the movable hitting block is connected to a horizontal slider, the horizontal slider is connected to the lower die through an elastic member, the upper die is provided with a side push punch, the side push punch acts on the horizontal slider to make the movable hitting block approach the stop block, and the elastic member acts on the horizontal slider to make the movable hitting block away from the stop block.

[0012] Furthermore, a slope is provided on the lower portion of the side push punch, and a roller that contacts the slope is rotatably provided on the horizontal slider.

[0013] Specifically, the feed punching unit includes a first station, a second station and a third station, the first station is used to cut two positioning holes on both sides of the material strip, the second station cuts a central preformed hole in the middle of the material strip based on the positioning holes, and the third station cuts off the waste area from the material strip to obtain a blank, the positioning holes are located in the waste area, the central preformed hole is located in the center of the blank and its diameter is smaller than the diameter of the middle hole, the blank has two ear preformed parts and two protruding positioning parts located at both ends of the radial direction, and the two protruding positioning parts are respectively located at the outermost ends of the ear preformed parts, and the third station is provided with a first positioning boss matching the central preformed hole and a waste hole corresponding to the waste area range; the embossing unit arches the middle part of the blank into a disc-shaped part; the punching and trimming unit transforms the ear preformed part in a flat plate state into an ear with a three-dimensional structure, corrects the outer contour of the ear, cuts out a through hole on the disc-shaped part, corrects the central preformed hole to a middle hole and cuts off the protruding positioning part.

[0014] The beneficial effects of the technical solution of this utility model are:

[0015] Without affecting the stepping pitch, the utility model can make better use of the material in the direction of the waste area at the position of the ear. The required width of the material strip is no longer the length of the symmetry axis of the blank, but a right-angled side with the symmetry axis as the hypotenuse, so the width of the material strip can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of a disc-shaped ear piece;

[0017] Figure 2 A three-dimensional view of the lower die of the disc-shaped ear-piece transfer die in the working state of the embodiment;

[0018] Figure 3 for Figure 2 A partial enlarged view of position A in the middle;

[0019] Figure 4 It is a three-dimensional diagram of the rotating unit when completing the rotation of the blank;

[0020] Figure 5 It is the structural change diagram of the material strip;

[0021] Figure 6 This is a diagram of the local position relationship between the lower die and the blank of the punching and trimming unit.

[0022] The numbers in the figure represent:

[0023] 1-disc-shaped piece with ears, 11-annular surface, 12-disc-shaped portion, 121-middle hole, 122-through hole, 13-ear;

[0024] 2-feed punching device, 21-material guide trough, 22-feed punching unit, 221-first positioning boss, 222-waste hole, 23-rotating unit, 231-support platform, 232-second positioning boss, 233-limiting pin, 234-stop block, 235-movable punching block, 236-horizontal slider, 237-elastic member, 238-side push punch, 239-roller, 24-embossing unit, 25-punching and trimming unit;

[0025] 3-material strip, 31-waste area, 311-positioning hole, 32-blank, 321-center pre-formed hole, 322-ear pre-formed part, 323-protruding positioning part. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to specific embodiments.

[0027] Example:

[0028] like Figure 1 and Figure 2 As shown, the utility model is a disc-shaped belt ear piece transfer mold 2 that saves material strip width, which is used to process the disc-shaped belt ear piece 1. The disc-shaped belt ear piece 1 has an annular surface 11, a disc-shaped portion 12 and two ears 13. The disc-shaped portion 12 is located on the inner side of the annular surface 11 and arched upward. The center of the disc-shaped portion 12 has a middle hole 121, and a plurality of through holes 122 are provided around the middle hole 121. The two ears 12 are symmetrically located at both ends of the diameter of the annular surface 11.

[0029] like Figure 2 and Figure 5 As shown, the disc-shaped belt ear piece transfer mold 2 includes a feed guide groove 21, a feed punching unit 22, a rotation unit 23, a embossing unit 24 and a punching and trimming unit 25 arranged along the conveying direction of the material belt 3. The working sections of the feed punching unit 22, the rotation unit 23, the embossing unit 24 and the punching and trimming unit 25 are all transported to the next work station by a stepping conveying unit (not shown).

[0030] The feed guide groove 21 is used to limit the feeding direction of the material strip 3. The feed punching unit 22 is used to cut out a blank 32 of a disc-shaped ear piece 1 from the material strip 3. The cut-out portion is the waste area 31. The axis of symmetry of the blank 32 forms an angle of 30-60 degrees with the conveying direction of the material strip 3. Without affecting the stepping pitch, the position of the ear 12 will make greater use of the material in the direction of the waste area 31. The required width of the material strip 3 is no longer the length of the axis of symmetry of the blank 32, but a right-angled side with the axis of symmetry as the hypotenuse, so the width of the material strip 3 can be saved. The rotation unit 23 is used to rotate the blank 32 to an angle where the axis of symmetry is perpendicular to the conveying direction of the material strip 3. The embossing unit 24 is used to emboss the middle part of the blank 32 to form a disc-shaped portion 12, and the annular surface portion 11 is obtained on the outside of the disc-shaped portion 12. The punching and trimming unit 25 is used to punch a through hole 122 in the disc-shaped portion 12, correct the middle cavity 121, and correct the structure of the ear 13.

[0031] like Figure 3 As shown, the feed punching unit 22 includes a first station, a second station, and a third station. The first station is used to cut two positioning holes 311 on either side of the material strip 3. The second station cuts a central preformed hole 321 in the center of the material strip 3 based on the positioning holes 311. The third station removes the waste area 31 from the material strip 3 to obtain a blank 32. The positioning holes 311 are located within the waste area 31. The central preformed hole 321 is located at the center of the blank 32 and has a diameter smaller than that of the middle hole 121. The blank 32 has two ear preformed portions 322 at both radial ends and two protruding positioning portions 323. The two protruding positioning portions 323 are respectively located at the outermost ends of the ear preformed portions 322. The third station is provided with a first positioning boss 221 that matches the central preformed hole 321 and a waste hole 222 corresponding to the waste area 31.

[0032] During the processing flow, the reference position undergoes multiple switching. The positioning hole 311 is the reference position of the material strip 3 during processing at the second and third stations. The center pre-formed hole 321 is both the rotation reference position of the blank 32 on the rotating unit 23 and the pre-formed structure of the middle hole 121, leaving a finishing margin between the two contours. The ear pre-formed portion 322 is the pre-formed structure of the ear 13, and the sides of the two contours also leave a finishing margin. The protruding positioning portion 323 is intentionally extended to serve as the lateral positioning reference part of the stepping conveyor unit.

[0033] like Figure 3 and Figure 4As shown, the rotating unit 23 includes a support 231, a second positioning boss 232 located at the center of the support 231, a limiting pin 233 located on one side of the support 231, a stopper 234 located on the other side of the support 231 and a movable hitting block 235 located on the third side of the support 231. The limiting pin 233 limits the initial rotation angle of the blank 32 on the second positioning boss 232. The movable hitting block 235 contacts one ear pre-forming part 322 to make the ear pre-forming part 322 close to the stopper 234 while making the other ear pre-forming part 322 away from the limiting pin 233 until the axis of the blank 32 is perpendicular to the conveying direction of the material belt 3.

[0034] The blank 32 is a flat plate, so the support 231 serves as the lower surface reference, and the second positioning boss 232 serves as the center reference. The limit pin 233 limits the angle of the blank 32 when its axis is tilted, and the stop block 234 limits the angle of the blank 32 when its axis is perpendicular to the conveying direction of the material belt 3. The rotation of the blank 32 is achieved by the movement of the movable block 235.

[0035] like Figure 4 As shown, the rotating unit 23 has an upper die and a lower die. A movable punch 235 is connected to a horizontal slider 236. The horizontal slider 236 is connected to the lower die via an elastic member 237. The upper die is provided with a side push punch 238. The side push punch 238 acts on the horizontal slider 236 to move the movable punch 235 toward the stopper 234. The elastic member 237 acts on the horizontal slider 236 to move the movable punch 235 away from the stopper 234. The lower portion of the side push punch 238 is provided with an inclined surface, and the horizontal slider 236 is provided with a roller 239 that rotatably contacts the inclined surface.

[0036] The rotation of the blank 32 is achieved by the telescopic movement of the movable punch block 235, which is driven by the downward pressure of the side punch 238. This ensures that the rotation rhythm is consistent with the punching rhythm of the entire transfer die, avoiding die collision. The roller 239 ensures that the side punch 238 has less resistance when driving the horizontal slider 236, ensuring smoother movement.

[0037] like Figure 2 and Figure 6 As shown, both the embossing unit 24 and the punching and trimming unit 25 contain multiple workstations. The embossing unit 24 is configured to arch the center portion of the blank 32 into a disc-shaped portion 12. The punching and trimming unit 25 is configured to transform the flat ear preform 322 into a three-dimensional ear 13, correct the outer contour of the ear 13, cut the through hole 122 in the disc-shaped portion 12, correct the central preformed hole 321 into a middle hole 121, and remove the protruding positioning portion 323. The processing of these two parts is already disclosed in Utility Model Patent CN113997010B and will not be repeated here.

[0038] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A disc-shaped ear piece transfer die that saves strip width, characterized by: Used to process disc-shaped ear pieces, the disc-shaped ear pieces have an annular face, a disc-shaped portion, and two ear pieces. The disc-shaped portion is located inside the annular face and arches upward. The disc-shaped portion has a central hole in its center, and a plurality of through holes are provided around the central hole. The two ear pieces are symmetrically located at both ends of the diameter of the annular face. The disc-shaped belt ear piece transfer die includes a feed guide groove, a feed punching unit, a rotation unit, a embossing unit and a punching and trimming unit arranged along the conveying direction of the material belt, and the feed punching unit, the rotation unit, the embossing unit and the punching and trimming unit are all transported to the next station by a stepping conveying unit; The feed punching unit is used to cut out the blank of the disc-shaped belt ear piece on the material strip, and the cut-off part is the waste area. The symmetry axis of the blank is at an angle of 30-60° to the conveying direction of the material strip. The rotating unit is used to rotate the blank to an angle where the symmetry axis is perpendicular to the conveying direction of the material strip.

2. The disc-shaped belt ear piece transfer die for saving strip width according to claim 1, characterized in that: The rotating unit includes a support, a second positioning boss located at the center of the support, a limit pin located on one side of the support, a stop block located on the other side of the support and a movable hitting block located on the third side of the support, the limit pin limits the initial rotation angle of the blank on the second positioning boss, and the movable hitting block contacts one ear preform part to make the ear preform part close to the stop block while making the other ear preform part away from the limit pin until the axis of the blank is perpendicular to the conveying direction of the material belt.

3. The disc-shaped belt ear piece transfer die for saving strip width according to claim 2, characterized in that: The rotating unit has an upper die and a lower die, the movable hitting block is connected to a horizontal slider, the horizontal slider is connected to the lower die through an elastic member, the upper die is provided with a side push punch, the side push punch acts on the horizontal slider to make the movable hitting block approach the stop block, and the elastic member acts on the horizontal slider to make the movable hitting block away from the stop block.

4. According to the disc-shaped ear piece transfer die that saves the width of the material strip as described in claim 3, the lower part of the side push punch is provided with an inclined surface, and a roller that contacts the inclined surface is rotatably provided on the horizontal slider.

5. The disc-shaped ear piece transfer die for saving the width of the material strip according to claim 1, wherein the feed punching unit includes a first station, a second station and a third station, the first station is used to cut two positioning holes on both sides of the material strip, the second station cuts a central pre-formed hole in the middle of the material strip based on the positioning holes, and the third station cuts the waste area from the material strip to obtain a blank, the positioning hole is located in the waste area, the central pre-formed hole is located in the center of the blank and its diameter is smaller than the diameter of the middle hole, and the blank has two radial holes. The two ear pre-forming parts and two protruding positioning parts at the end, the two protruding positioning parts are respectively located at the outermost ends of the ear pre-forming parts, and the third workstation is provided with a first positioning boss matching the central pre-forming hole and a waste hole corresponding to the waste area range; the embossing unit arches the middle part of the blank into a disc-shaped part; the punching and trimming unit transforms the ear pre-forming part in a flat state into an ear with a three-dimensional structure, corrects the outer contour of the ear, cuts out a through hole on the disc-shaped part, corrects the central pre-forming hole to an intermediate hole and cuts off the protruding positioning parts.

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