CN113000647B - Method and equipment for manufacturing small-diameter slotted cylindrical metal piece with one end turned - Google Patents
Method and equipment for manufacturing small-diameter slotted cylindrical metal piece with one end turned Download PDFInfo
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- CN113000647B CN113000647B CN202110220387.1A CN202110220387A CN113000647B CN 113000647 B CN113000647 B CN 113000647B CN 202110220387 A CN202110220387 A CN 202110220387A CN 113000647 B CN113000647 B CN 113000647B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
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Abstract
The invention provides a method and equipment for manufacturing a small-diameter slotted cylindrical metal piece with one end turned up. The manufacturing equipment comprises: three process rounding equipment, three process rounding equipment includes: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel, wherein the Y-shaped mandrel is used as a male mold, and the three concave molds are respectively: the first concave mould, the second concave mould and the third concave mould are assembled to form a closed circle. The manufacturing method adopts the manufacturing equipment. The invention has the advantages of relatively simple whole equipment, less interference between the dies, reliable quality, high efficiency and low investment.
Description
Technical Field
The invention relates to the field of slotted bushings, in particular to a method and equipment for manufacturing a small-diameter slotted cylindrical metal piece with one end turned over.
Background
At present, the diameter range of available goods of the slotted bushing (small-diameter slotted cylindrical metal piece) is 4mm-120mm, a 301 or 302 stainless steel belt is selected as a material, and the manufacturing process of the slotted bushing is as follows in general: firstly, rolling and then flanging. Before flanging, the inside and outside of the slotted cylinder are clamped by special dies, so that the process is complex and the efficiency is low. The problems existing at present are:
(1) The flanging is carried out after the rolling, and the phenomenon that the lap joint amount is small or the lap joint cannot be carried out easily occurs to the flanging part.
(2) For a small-diameter (the diameter is less than or equal to 10 mm) slotting cylinder, the existing flanging tool is easy to interfere, and the forming quality is difficult to meet the product quality requirement.
(3) Even if the problems of the two points can be overcome, the manufacturing process is complex, the equipment is complex and the cost input is high.
In summary, the following problems exist in the prior art: the small-diameter slotted cylindrical metal piece with one end turned up is poor in quality or complex in manufacturing process, complex in equipment and high in cost input.
Disclosure of Invention
The invention provides a method and equipment for manufacturing a small-diameter slotted cylindrical metal part with one turned-over edge, which are used for solving the problems that the small-diameter slotted cylindrical metal part with one turned-over edge is poor in quality or complex in manufacturing process, complex in equipment and high in cost investment.
To this end, the invention proposes a small-diameter slit cylindrical metal piece manufacturing apparatus with one end turned up, the manufacturing apparatus comprising: three process rounding equipment, three process rounding equipment includes: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel, wherein the Y-shaped mandrel is used as a male mold, and the three concave molds are respectively: the first concave mould, the second concave mould and the third concave mould are assembled to form a closed circle.
Further, the method comprises the steps of,
the Y-shaped mandrel comprises: the cylindrical main body and the cone frustum connected to the top end of the cylindrical main body, the bottom end of the cone frustum is connected to the top end of the cylindrical main body, the diameter of the top end of the cone frustum is larger than that of the bottom end of the cone frustum, and the axial section of the Y-shaped mandrel is Y-shaped;
the first concave mould, the second concave mould and the third concave mould have the same structure, are symmetrically arranged around the Y-shaped mandrel, and each concave mould comprises: a base body 10 and a bonding surface arranged on one side of the base body 10,
the bonding surface comprises: the first straight surface 11, the second straight surface 12 and the arc-shaped cylindrical surface 13 connected between the first straight surface 11 and the second straight surface 12, wherein the first straight surface 11 and the second straight surface 12 are symmetrical with respect to the axis of the arc-shaped cylindrical surface 13, an included angle of 120 degrees is formed between the first straight surface 11 and the second straight surface 12, the top edge of the first straight surface 11 intersects with the arc-shaped cylindrical surface 13, the bottom edge of the first straight surface 11 intersects with the substrate 10, and the distance between the top edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13 is smaller than the distance between the bottom edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13;
each straight surface of each concave mould is respectively attached to the corresponding straight surface of each adjacent concave mould;
each arc-shaped cylindrical surface 13 is a 1/3 cylindrical surface,
the arcuate cylindrical surfaces 13 of the three concave molds form a complete cylindrical surface.
Further, each concave mould motion is driven by a hydraulic cylinder or air cylinder.
Further, the manufacturing device of the present invention further comprises: and a single-side flanging roller 6 for flanging one side of the plate 5. The single-side flanging roller 6 is arranged in the flanging process and is positioned at the upstream of the three-process rounding equipment or in the previous process; the three-procedure rounding equipment rolls the workpiece with the turned single side.
The invention also provides a manufacturing method of the small-diameter slotted cylindrical metal piece with one turned edge, wherein the manufacturing method of the small-diameter slotted cylindrical metal piece with one turned edge adopts a mode of turning edge first and then rolling, and adopts small-diameter slotted cylindrical metal piece manufacturing equipment with one turned edge;
the manufacturing method of the small-diameter slotted cylindrical metal piece with one turned-over edge comprises the following steps:
step A: uncoiling and feeding: unreeling and feeding stainless steel plate materials with certain width;
and (B) step (B): flanging one side of the plate material: the single side of the plate is turned over by a single side turning-over roller;
step C: cutting off the plate: accurately dividing the plate material subjected to single-side flanging into sections according to the expansion size of the slotted round pipe; or finishing plate cutting in the earlier stage of the movement of the first concave die in the next procedure;
step D: and (3) coiling in three working procedures: the forming process comprises the following steps: placing the cut plate below a Y-shaped mandrel, wherein the Y-shaped mandrel is in a static state, and the first concave die, the first concave die and the third concave die sequentially move from the Y-shaped mandrels in three different directions, so that the plate is gradually bent to be attached to the mandrels, and a lap joint cylindrical part with a flanging is formed, wherein the first concave die, the first concave die and the third concave die are assembled to form a round integral concave die.
Further, the equipment adopted in the step D is as follows: three-procedure rolling equipment;
the three-process rounding device comprises: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel are respectively: the first concave mould, the second concave mould and the third concave mould are closed to form a closed circle;
the Y-shaped mandrel is used as a male die, and is made of cold-work die steel (such as Cr12mov, SKD11, DC53 and the like); the Y-shaped mandrel comprises: the cylindrical main body and the cone frustum connected to the top end of the cylindrical main body, the bottom end of the cone frustum is connected to the top end of the cylindrical main body, the diameter of the top end of the cone frustum is larger than that of the bottom end of the cone frustum, and the axial section of the Y-shaped mandrel is Y-shaped;
the first concave mould, the second concave mould and the third concave mould are identical in material and structure and can be replaced with each other, and the concave moulds are made of cold work mould steel (such as Cr12mov, SKD11, DC53 and the like);
symmetry sets up around Y shape dabber, and each concave mould all includes: a base body 10 and a bonding surface arranged on one side of the base body 10,
the bonding surface comprises: the first straight surface 11, the second straight surface 12 and the arc-shaped cylindrical surface 13 connected between the first straight surface 11 and the second straight surface 12, wherein the first straight surface 11 and the second straight surface 12 are symmetrical with respect to the axis of the arc-shaped cylindrical surface 13, an included angle of 120 degrees is formed between the first straight surface 11 and the second straight surface 12, the top edge of the first straight surface 11 intersects with the arc-shaped cylindrical surface 13, the bottom edge of the first straight surface 11 intersects with the substrate 10, and the distance between the top edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13 is smaller than the distance between the bottom edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13;
each straight surface of each concave mould is respectively attached to the corresponding straight surface of each adjacent concave mould;
each arc-shaped cylindrical surface 13 is a 1/3 cylindrical surface,
the arcuate cylindrical surfaces 13 of the three concave molds form a complete cylindrical surface.
Further, the first concave mould is arranged below the Y-shaped mandrel, the second concave mould and the third concave mould are respectively arranged at the lateral direction of the Y-shaped mandrel,
the step D specifically comprises the following steps:
step D1: asymmetrically placing the cut plate material between the first concave molds relative to the axis of the mandrel; the distance between the two ends of the cut plate and the axis of the mandrel is unequal;
step D2: the first concave mould moves upwards firstly to deform the plate material into a bent hook shape or approximately U shape, and the bent hook shape comprises: the long side, the short side and the arc side connected between the long side and the short side;
step D3: the second concave mould moves from one side to the mandrel, so that the long side is attached to the mandrel;
step D4: and finally, the third concave die moves from the other side to the mandrel, so that the short side is attached to the mandrel, and a slotted cylindrical part with one turned end is formed.
Further, the length of the arc side is equal to the length of the radial section of the arc cylindrical surface 13, the length of the short side is smaller than the length of the arc side, and the length of the long side is larger than the length of the arc side.
Further, the method comprises the steps of,
the step D3 specifically comprises the following steps: the second concave die moves towards the mandrel, so that after the long side is attached to the mandrel, the outer end of the long side is positioned outside the second concave die;
the step D4 specifically comprises the following steps: the third concave die moves towards the mandrel, so that the short side is attached to the mandrel, and the outer end of the long side is attached to the mandrel at the same time, so that a complete slotted cylinder part is formed.
Further, the movement directions of the second concave mold and the third concave mold respectively form an included angle of 60 degrees with the horizontal direction.
Further, the method for manufacturing the small-diameter slotted cylindrical metal piece with one turned-over edge further comprises the following steps:
step E: shaping: the three concave molds are pressed against for a moment at the same time, and shaping is completed;
step F: and (5) die sinking: and returning the three concave molds, and taking out the workpiece by a mandrel drawing or blowing mode and the like.
The flanging tool is easy to interfere, and the forming quality is difficult to meet the product quality requirement. In addition, by adopting the equipment and the method, the three-procedure rounding equipment adopts three concave molds and the mandrel, the three concave molds can be replaced, the whole equipment is relatively simple, the interference among the molds is less, the quality is reliable, the efficiency is high, and the investment is low.
Drawings
FIG. 1 is a schematic diagram of a front view of a slotted tubular metal piece with one end turned up;
FIG. 2 is a schematic side view of a slotted cylindrical metal piece with one end turned up;
FIG. 3 is a schematic diagram of the operation principle of the flanging step of the present invention;
FIG. 4 is a schematic view of a mandrel used in the present invention;
FIG. 5 is a schematic structural view of a three-process rounding apparatus employed in the present invention;
FIG. 6 is a schematic diagram of the working principle of the invention in which the plate is placed asymmetrically with respect to the axis of the mandrel;
FIG. 7 is a schematic diagram of the working principle of the first concave mold of the present invention moving upward first;
FIG. 8 is a schematic diagram of the working principle of the second concave mold moving towards the mandrel to make the long side fit with the mandrel;
FIG. 9 is a schematic diagram of the working principle of the third concave mold moving toward the mandrel to make the short side fit the mandrel;
fig. 10 is a schematic view of the structure of each concave mold in the front view direction.
Reference numerals illustrate:
1. a first concave mold; 2. a second concave mold; 3. a third concave mold; 4. a mandrel; 5. plate material; 6. a single-side flanging roller;
10. a base; 11. a first straight surface; 12. a second straight surface; 13. an arc cylindrical surface; 20. a direction of movement; 30. a direction of movement; 45. the axis of the mandrel;
51. a first end of the sheet; 52. a second end of the sheet; 510. short sides; 520. a long side; 521. the outer end 530 of the long side, the circular arc side; 55. and (5) obtaining a finished workpiece.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the dimensions (in mm) of the split bush (small-diameter split cylindrical metal piece) are: length L:25.4, transition length H:1.0, transition fillet r:0.5, flare diameter D:9.90, α is 85 degrees, liner thickness δ:0.254, bushing inner diameter d1:8.40 (at cylinder) overlap amount A1:1.70 (flanging) overlap amount A2:0.50.
the process route of the invention is as follows: firstly flanging and then rounding, and specifically comprises the following steps:
1. uncoiling and feeding: and (3) uncoiling and feeding the 301 or 302 stainless steel plate material with a certain width.
2. As shown in fig. 3, the side of the plate 5 is turned up: and (3) realizing the single-side flanging of the plate material by a plurality of groups (3-5 groups) of single-side flanging rollers 6.
3. Cutting off the plate: accurately dividing the plate material subjected to single-side flanging into sections according to the expansion size of the slotted round pipe; or cutting the plate material in the earlier stage of the movement of the first concave die 1 in the next step, namely, blanking and bending the plate material.
4. Rolling in three procedures;
5. shaping: and pressing the three dies for a moment to finish shaping.
6. And (5) die sinking: and returning the concave die, and taking out the workpiece by means of a mandrel drawing or blowing and the like.
Wherein, the three-procedure rolling forming process comprises the following steps: the Y-shaped mandrel 4 (shown in fig. 4) is in a static state, and the three concave molds sequentially move (the first concave mold 1, the second concave mold 2 and the third concave mold 3 are respectively arranged according to the movement sequence), so that the plate 5 is gradually bent to be attached to the mandrel 4, and a lap joint cylindrical part with a flanging is formed, namely a finished workpiece 55.
As shown in fig. 5, the present invention proposes a small-diameter slit cylindrical metal piece manufacturing apparatus with one end turned up, the manufacturing apparatus comprising: three process rounding equipment, three process rounding equipment includes: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel, wherein the Y-shaped mandrel is used as a male mold, and the three concave molds are respectively: the first concave mould, the second concave mould and the third concave mould are assembled to form a closed circle.
The first concave mould, the second concave mould and the third concave mould have the same structure and are symmetrically arranged around the Y-shaped mandrel 4, and each concave mould comprises: the base body 10 and the joint surface arranged on one side of the base body 10, wherein the joint surface is the die surface of each die and is used for forming a die space for pressing a workpiece with the mandrel 4;
as shown in fig. 10, the bonding surface includes: the first straight surface 11, the second straight surface 12 and the arc-shaped cylindrical surface 13 connected between the first straight surface 11 and the second straight surface 12, wherein the first straight surface 11 and the second straight surface 12 are symmetrical about the axis of the arc-shaped cylindrical surface 13, namely the axis 45 of the mandrel, and the first straight surface 11 and the second straight surface 12 form a 120-degree included angle, the top edge of the first straight surface 11 intersects with the arc-shaped cylindrical surface 13, the bottom edge of the first straight surface 11 intersects with the substrate 10, and the distance between the top edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13 is smaller than the distance between the bottom edge of the first straight surface 11 and the axis of the arc-shaped cylindrical surface 13;
each straight surface of each concave mould is respectively attached to the corresponding straight surface of each adjacent concave mould;
each arc-shaped cylindrical surface 13 is a 1/3 cylindrical surface,
the arcuate cylindrical surfaces 13 of the three concave molds form a complete cylindrical surface.
The three concave molds and the Y-shaped mandrel are structured, so that the male mold and the female mold are matched, and the male mold and the female mold are matched for pressing without interference with flanging.
Further, the first concave die is arranged below the Y-shaped mandrel, and the second concave die and the third concave die are respectively arranged at the lateral direction of the Y-shaped mandrel, so that the dies can move independently and do not interfere with each other.
Further, as shown in fig. 3, the manufacturing apparatus of the present invention further includes: and a single-side flanging roller 6 for flanging one side of the plate 5. The single-side flanging roller 6 is arranged in the flanging process and is positioned at the upstream of the three-process rounding equipment or in the previous process; the three-procedure rounding equipment rolls the workpiece with the turned single side. The number of the unilateral flanging rollers 6 is multiple, each group comprises an upper roller and a lower roller, one end of the upper roller is a protruding end protruding out of the roller main body in the radial direction, the same end of the lower roller is a shrinking end shrinking out of the roller main body in the radial direction, and the protruding end and the shrinking end are matched and pressed at the same end to form unilateral flanging of the plate 5.
Further, the method specifically comprises the following steps:
step D1: the cut plate 5 is asymmetrically placed between the first concave molds 1 relative to the axis of the mandrel; the distance between the two ends of the cut plate and the axis of the mandrel is unequal; the length of the first end 51 of the sheet material from the mandrel axis 45 is greater than the length of the second end 52 of the sheet material from the mandrel axis 45; (the purpose of the asymmetric placement is to make the overlap position not between the second female die 2 and the second female die 3, so that the overlap position is in the stress position of the second female die 3, which is more advantageous for the shaping of the material in the overlap position)
Step D2: the first concave die 1 moves upwards to deform the plate material into a bent hook shape or approximately U shape, wherein the bent hook shape comprises: a long side 520, a short side 510, and a circular arc side 530 connected between the long side and the short side;
step D3: the second female mould 2 is then moved from one side towards the mandrel 4 according to the direction of movement 20, bringing the long side 520 into abutment with the mandrel;
step D4: the third concave mould 3 finally moves towards the mandrel from the other side according to the movement direction 30, so that the short side 510 is attached to the mandrel, and a slotted cylinder with one turned end is formed.
Further, the length of the arc side 530 is equal to the radial cross section of the arc cylindrical surface 13, the length of the short side 510 is smaller than the length of the arc side, and the length of the long side 520 is larger than the length of the arc side.
Further, the method comprises the steps of,
the step D3 specifically comprises the following steps: the second concave mould 2 moves towards the mandrel 4, so that after the long side 520 is attached to the mandrel, the outer end 521 of the long side is positioned outside the second concave mould 2;
the step D4 specifically comprises the following steps: the third concave mold is moved toward the mandrel to bring the short side 510 into engagement with the mandrel 4 and simultaneously bring the long side outer end 521 into engagement with the mandrel 4 to form a complete slotted cylinder, i.e., the finished workpiece 55.
Further, the movement directions of the second concave mold and the third concave mold respectively form an included angle of 60 degrees with the horizontal direction. In this way, the stress of the second concave mold and the third concave mold can be applied to the workpiece with high efficiency.
The concave molds are driven by hydraulic cylinders or air cylinders, and the movement speed is set within the range of 50-500mm/s according to the forming quality. The hydraulic cylinder is adopted, so that the driving is stable and accurate. The cylinder is adopted fast and the efficiency is high.
As shown in fig. 6, 7, 8 and 9, the female mold can be moved in a horizontal or vertical plane depending on the installation of the apparatus. The invention takes vertical movement as an example, and takes the upward movement of the first concave mould 1, and the principle is also applicable to the downward movement of the first concave mould 1.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. In order that the components of the invention may be combined without conflict, any person skilled in the art shall make equivalent changes and modifications without departing from the spirit and principles of the invention.
Claims (7)
1. One-end flanging small-diameter slotted cylindrical metal part manufacturing equipment is characterized in that the manufacturing equipment comprises: three process rounding equipment, three process rounding equipment includes: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel are made of alloy, the Y-shaped mandrel is used as a male mold, and the three concave molds are respectively: the first concave mould, the second concave mould and the third concave mould are closed to form a closed circle;
the manufacturing method of the small-diameter slotted cylindrical metal part with one turned edge adopts a mode of turning edge first and then rolling, and comprises the following steps of:
step A: uncoiling and feeding: unreeling and feeding stainless steel plate materials with certain width;
and (B) step (B): flanging one side of the plate material: the single side of the plate is turned over by a single side turning-over roller;
step C: cutting off the plate: accurately dividing the plate material subjected to single-side flanging into sections according to the expansion size of the slotted round pipe; or finishing plate cutting in the earlier stage of the movement of the first concave die in the next procedure;
step D: and (3) coiling in three working procedures: the forming process comprises the following steps: placing the cut plate below a Y-shaped mandrel, wherein the Y-shaped mandrel is in a static state, and the first concave die, the second concave die and the third concave die sequentially move towards the Y-shaped mandrel from three different directions, so that the plate is gradually bent to be attached to the mandrel to form an overlapped cylindrical part with a flanging, and the first concave die, the second concave die and the third concave die are assembled to form a round integral concave die;
the first concave mould is arranged below the Y-shaped mandrel, the second concave mould and the third concave mould are respectively arranged at the lateral direction of the Y-shaped mandrel,
the step D specifically comprises the following steps:
step D1: placing the cut plate in an asymmetric form relative to the axis of the mandrel between the first concave molds; the distance between the two ends of the cut plate and the axis of the mandrel is unequal;
step D2: the first concave mould moves upwards firstly to deform the plate material into a bent hook shape, and the bent hook shape comprises: the long side, the short side and the arc side connected between the long side and the short side;
step D3: the second concave mould moves from one side to the mandrel, so that the long side is attached to the mandrel;
step D4: the third concave die moves from the other side to the mandrel, so that the short side is attached to the mandrel, and a slotted cylindrical part with one turned end is formed;
the movement directions of the second concave mould and the third concave mould respectively form 60-degree included angles with the horizontal direction.
2. The apparatus for making a small-diameter slotted tubular metal part with one end turned up as defined in claim 1, wherein the first concave mold, the second concave mold and the third concave mold are identical in structure and symmetrically arranged around the Y-shaped mandrel, each concave mold comprising: a base body (10) and a bonding surface arranged on one side of the base body (10),
the bonding surface comprises: a first straight surface (11), a second straight surface (12), and an arc-shaped cylindrical surface (13) connected between the first straight surface (11) and the second straight surface (12), wherein the first straight surface (11) and the second straight surface (12) are symmetrical about the axis of the arc-shaped cylindrical surface (13), and the first straight surface (11) and the second straight surface (12) form an included angle of 120 degrees;
each straight surface of each concave mould is respectively attached to the corresponding straight surface of each adjacent concave mould;
each arc cylindrical surface (13) is a 1/3 cylindrical surface, and the arc cylindrical surfaces (13) of the three concave molds form a whole cylindrical surface.
3. A small diameter slit cylindrical metal part manufacturing apparatus for flanging one end according to claim 1, wherein each concave die movement is driven by a hydraulic cylinder or a pneumatic cylinder.
4. The apparatus for manufacturing a small diameter slit cylindrical metal part with one end turned up as set forth in claim 1, wherein said apparatus for step D is: three-procedure rolling equipment;
the three-process rounding device comprises: the Y-shaped mandrel and three concave molds surrounding the circumference of the Y-shaped mandrel are respectively: the first concave mould, the second concave mould and the third concave mould are closed to form a closed circle;
the Y-shaped mandrel is used as a male die, and comprises: the cylindrical main body and the cone frustum connected to the top end of the cylindrical main body, the bottom end of the cone frustum is connected to the top end of the cylindrical main body, the diameter of the top end of the cone frustum is larger than that of the bottom end of the cone frustum, and the axial section of the Y-shaped mandrel is Y-shaped;
the first concave mould, the second concave mould and the third concave mould have the same structure, are symmetrically arranged around the Y-shaped mandrel, and each concave mould comprises: base member (10) and set up the laminating face in base member (10) one side, the laminating face includes: the device comprises a first straight surface (11), a second straight surface (12) and an arc-shaped cylindrical surface (13) connected between the first straight surface (11) and the second straight surface (12), wherein the first straight surface (11) and the second straight surface (12) are symmetrical with respect to the axis of the arc-shaped cylindrical surface (13), the first straight surface (11) and the second straight surface (12) form an included angle of 120 degrees, the top edge of the first straight surface (11) is intersected with the arc-shaped cylindrical surface (13), the bottom edge of the first straight surface (11) is intersected with the substrate (10), and the distance between the top edge of the first straight surface (11) and the axis of the arc-shaped cylindrical surface (13) is smaller than the distance between the bottom edge of the first straight surface (11) and the axis of the arc-shaped cylindrical surface (13);
each straight surface of each concave mould is respectively attached to the corresponding straight surface of each adjacent concave mould;
each arc cylindrical surface (13) is a 1/3 cylindrical surface, and the arc cylindrical surfaces (13) of the three concave molds form a whole cylindrical surface.
5. A small diameter slit cylindrical metal part manufacturing apparatus of one end turn-ups according to claim 1, characterized in that the length of the arc side is equal to the length of the radial section of the arc cylindrical surface (13), the length of the short side is smaller than the length of the arc side, and the length of the long side is larger than the length of the arc side.
6. The apparatus for manufacturing a small-diameter slit cylindrical metal part with one end turned up as set forth in claim 5, wherein,
the step D3 specifically comprises the following steps: the second concave mould moves towards the mandrel, so that after the long side is attached to the mandrel, the outer end (521) of the long side is positioned outside the second concave mould;
the step D4 specifically comprises the following steps: the third concave die moves towards the mandrel, so that the short side is attached to the mandrel, and the outer end of the long side is attached to the mandrel at the same time, so that a complete slotted cylinder part is formed.
7. The apparatus for forming a small-diameter slit cylindrical metal part with one end turned-up as set forth in claim 1, wherein said method for forming a small-diameter slit cylindrical metal part with one end turned-up further comprises:
step E: shaping: the three concave molds are pressed against for a moment at the same time, and shaping is completed;
step F: and (5) die sinking: and returning the three concave molds, and taking out the workpiece by a mandrel drawing or blowing mode and the like.
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| CN202110220387.1A CN113000647B (en) | 2021-02-26 | 2021-02-26 | Method and equipment for manufacturing small-diameter slotted cylindrical metal piece with one end turned |
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