CN116213551A - Alloy stamping and rolling method - Google Patents

Abstract

The invention discloses an alloy punching and rolling method, which comprises the steps of firstly cutting an alloy plate with a specific width, carrying out first punching and rolling on the alloy plate to obtain a first rolled product, carrying out second punching and rolling on the first rolled product after the first punching and rolling, further bending the two ends of the alloy plate to 90 degrees, carrying out third punching and rolling on the second rolled product, starting bending the middle part of the alloy plate, enabling the two ends to be close to each other, carrying out fourth punching and rolling on the third rolled product, and supporting the alloy plate through a rolling core to enable the alloy plate to be round preliminarily; after finishing the four-time rounding process, stamping and shaping the four-time rounding product, namely left-right shaping, up-down shaping and left-right shaping, and after the three shaping processes, enabling the roundness tolerance of the finally obtained target workpiece to meet the requirement.

Description

Alloy stamping and rolling method

Technical Field

The invention relates to the technical field of alloy stamping, in particular to an alloy stamping and rolling method.

Background

The alloy stamping rolling refers to forming an alloy plate into a round workpiece such as a round tube by a stamping mode, and generally includes two rolling modes, namely, stamping the alloy plate into a U shape firstly, stamping the alloy plate against the mouth of the U-shaped workpiece to form the round workpiece, and stamping the alloy plate into a W shape firstly, stamping the alloy plate into a fan shape aiming at the middle bulge, and stamping the alloy plate into the round workpiece. The two stamping methods have the problem of low precision, and the roundness tolerance of the stamped circular workpiece is large, so that the tolerance requirement of a high-precision workpiece cannot be met.

Disclosure of Invention

The invention aims to overcome the defects or problems in the prior art and provide an alloy stamping and rounding method which can effectively improve the roundness tolerance of a round workpiece.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

an alloy stamping and rounding method comprises the following steps:

s1, calculating perimeter cutting according to a target workpiece radius to obtain alloy plates with corresponding widths;

s2, performing primary stamping and rounding on the alloy plate to obtain a primary rolled product, wherein the central angle of a stamping die is 45 degrees, the radius is one sixth of the circumference, and the stamping position is one third of the circumference position taking the central line of the alloy plate as a starting point;

s3, carrying out secondary punching and rolling on the primary rolled product to obtain a secondary rolled product, wherein the central angle of a punching die is 90 degrees, the radius is one sixth of the circumference, and the punching position is one sixth of the circumference position taking the central line of the alloy plate as a starting point;

s4, carrying out third punching and rounding on the secondary rolled product to obtain a third rolled product, wherein the central angle of a punching die is 66 degrees, the radius is one sixth of the circumference, and the punching position is the center line of the alloy plate;

s5, carrying out fourth punching and rounding on the third round product to obtain a fourth round product, wherein the punching die is provided with a round core corresponding to the radius of the target workpiece, and the third round product is punched to surround the round core;

s6, performing primary shaping on the four-time rolled product to obtain a primary shaped product, wherein a shaping die is provided with a female die corresponding to the radius of the target workpiece, and the shaping direction is left and right sides;

s7, performing secondary shaping on the primary shaping product to obtain a secondary shaping product, wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece, and the shaping direction is the upper side and the lower side;

s8, performing third shaping on the secondary shaping product to obtain a target workpiece, wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece, and the shaping direction is the left side and the right side.

Further, in the steps S2 and S3, the two ends of the product obtained in the previous step in the width direction are punched and rounded.

Further, in the steps S2, S3, S4 and S5, the rolling stamping device performs stamping and rolling, and the rolling stamping device includes a bending punch and a female die, and the bending punch and the female die are matched to form the stamping die; in the steps S2, S3, and S4, the central angle of the stamping die refers to the central angle corresponding to the arc of the part on the bending punch and the concave die for stamping and rolling.

Further, in the steps S6 and S8, shaping is performed by a left-right shaping stamping device, the left-right shaping stamping device includes a shaping slider, a wedge-shaped punch and a shaping core, the shaping slider is used for shaping the left side and the right side of the fourth round product, the wedge-shaped punch is used for driving the shaping slider to slide, and the shaping core in the shaping stamping device is used for supporting the fourth round product and the secondary shaping product.

Further, in step S7, the shaping is performed by an upper shaping stamping device and a lower shaping stamping device, the upper shaping stamping device and the lower shaping stamping device comprise a shaping punch, a shaping die and a shaping round core, the shaping punch and the shaping die cooperate to shape the upper side and the lower side of the primary shaping product, and the shaping round core in the upper shaping stamping device and the lower shaping stamping device is used for supporting the primary shaping product.

Further, in the steps S1 to S8, the flushing speed is 80SPM, and the tonnage is 110 tons.

As can be seen from the above description of the present invention, the present invention has the following advantages over the prior art:

the invention provides an alloy stamping and rounding method, which comprises four times of stamping and rounding and three times of stamping and shaping, wherein the roundness tolerance of the finally obtained product is small, and the requirement of a precise workpiece can be met.

In the rolling method, firstly, an alloy plate with a specific width is cut, then the alloy plate is subjected to primary stamping rolling to obtain a primary rolling product, after the primary stamping rolling, the two ends of the alloy plate are preliminarily bent to be 45 degrees, then the primary rolling product is subjected to secondary stamping rolling, the two ends of the alloy plate are further bent to be 90 degrees, then the secondary rolling product is subjected to tertiary stamping rolling, the middle part of the alloy plate starts to be bent, the two ends are mutually close, then the tertiary rolling product is subjected to tertiary stamping rolling, and the secondary stamping rolling is supported by a rolling core of the alloy plate, so that the alloy plate preliminarily presents a round shape;

after finishing the four-time rounding process, stamping and shaping the four-time rounding product, namely left-right shaping, up-down shaping and left-right shaping, and after the three shaping processes, enabling the roundness tolerance of the finally obtained target workpiece to meet the requirement.

In the process, corresponding stamping and rolling parameters are designed, the central angle, radius and stamping position of the stamping die are adjusted, and the roundness tolerance of the finally obtained target workpiece is further reduced through repeated stamping and rolling and stamping and shaping.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a first press rolling in an embodiment of an alloy press rolling method according to the present invention;

FIG. 2 is a schematic diagram of a second press rolling in an embodiment of an alloy press rolling method according to the present invention;

FIG. 3 is a schematic diagram of a third press rolling method according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a fourth press rolling in an embodiment of an alloy press rolling method according to the present invention;

FIG. 5 is a schematic diagram of a first press shaping in an embodiment of an alloy press rolling method according to the present invention;

FIG. 6 is a schematic diagram of a second press shaping in an embodiment of an alloy press rolling method according to the present invention;

fig. 7 is a schematic diagram of third press shaping in an embodiment of an alloy press rolling method according to the present invention.

The main reference numerals illustrate:

a first bending punch 11; a first female die 21; a primary rolling product 31;

a second bending punch 12; a second female die 22; a secondary rounding product 32;

a third bending punch 13; a third female die 23; a first rounded core 231; rolling the product 33 three times;

a fourth bending punch 14; a fourth die 24; a second rounded core 241; a fourth round product 34;

a first wedge punch 41; a first shaping slider 42; a first shaping core 43; a first briquette 44; primary shaping product 35;

a first shaping punch 15; a first shaping die 25; a second shaping core 251; secondary shaping product 26;

a second wedge punch 45; a second shaping slider 46; a third shaping core 47; a second briquette 48; a target workpiece 37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are preferred embodiments of the invention and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without creative efforts, are within the protection scope of the present invention.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the invention.

In the claims, specification and drawings of the present invention, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present invention, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

The invention provides an alloy stamping and rolling method, which mainly comprises the following steps:

s1, calculating perimeter cutting according to the radius of a target workpiece 37 to obtain alloy plates with corresponding widths;

s2, performing primary stamping and rounding on the alloy plate to obtain a primary rolled product 31, wherein the central angle of a stamping die is 45 degrees, the radius is one sixth of the circumference, and the stamping position is one third of the circumference position taking the central line of the alloy plate as a starting point;

s3, carrying out secondary punching and rounding on the primary rolled product 31 to obtain a secondary rolled product 32, wherein the central angle of a punching die is 90 degrees, the radius is one sixth of the circumference, and the punching position is one sixth of the circumference position taking the central line of the alloy plate as a starting point;

s4, carrying out third punching and rounding on the secondary rolled product 32 to obtain a tertiary rolled product 33, wherein the central angle of a punching die is 66 degrees, the radius is one sixth of the circumference, and the punching position is the center line of the alloy plate;

s5, performing fourth punching and rounding on the third round product 33 to obtain a fourth round product 34, wherein the punching die is provided with a round core corresponding to the radius of the target workpiece 37, and the third round product 33 is punched to surround the round core;

s6, performing primary shaping on the fourth round product 34 to obtain a primary shaped product 35, wherein a shaping die is provided with a female die corresponding to the radius of the target workpiece 37, and the shaping direction is left and right sides;

s7, performing secondary shaping on the primary shaping product 35 to obtain a secondary shaping product 26, wherein the shaping mold is provided with a female mold corresponding to the radius of the target workpiece 37, and the shaping direction is the upper side and the lower side;

and S8, performing third shaping on the secondary shaping product 26 to obtain a target workpiece 37, wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece 37, and the shaping direction is the left side and the right side.

In the steps S2 and S3, the product obtained in the previous step is punched and rolled at both ends in the width direction.

In the steps S2, S3, S4 and S5, punching and rounding are carried out through a rounding punching device, wherein the rounding punching device comprises a bending punch and a female die, and the bending punch and the female die are matched to form the punching die; in the steps S2, S3, and S4, the central angle of the stamping die refers to the central angle corresponding to the arc of the part on the bending punch and the concave die for stamping and rolling.

In steps S6 and S8, shaping is performed by a left and right shaping press device, where the left and right shaping press device includes a shaping slide block, a wedge-shaped punch and a shaping core, the shaping slide block is used to shape left and right sides of the fourth round product 34, the wedge-shaped punch is used to drive the shaping slide block to slide, and the shaping core in the shaping press device is used to support the fourth round product 34 and the secondary shaping product 26.

In step S7, the shaping is performed by an upper and lower shaping stamping device, which includes a shaping punch, a shaping die and a shaping core, the shaping punch and the shaping die cooperate to shape the upper and lower sides of the primary shaping product 35, and the shaping core in the upper and lower shaping stamping device is used to support the primary shaping product 35.

Further, in steps S1 to S8, the flushing speed is 80SPM and the tonnage is 110 tons.

The specific operation of each step is discussed in detail below.

In step S1, the alloy sheet having the corresponding width is obtained by dividing the circumference by calculating the radius of the target workpiece 37, and since the method provided by the invention is used for forming the round tube-shaped workpiece, the width of the alloy sheet needs to be set in advance, and the length of the alloy sheet can be set according to the actual needs and the conditions of the punching equipment. The specific dimensional accuracy can be set according to actual needs, for example, pi is valued. After the large-size alloy plate is cut by an open type tilting press or other slitting equipment, the alloy plate with specific width can be obtained, and the alloy plate is a basic workpiece of the subsequent process.

Referring to fig. 1, the step S2 is performed by using the apparatus shown in fig. 1, wherein the rolling and stamping device includes a first bending punch 11 and a first die 21, the first die 21 is adapted to the first bending punch 11, and is capable of stamping and rolling an alloy plate, wherein a portion of the first bending punch 11 and the first die 21 for stamping and rolling is arc-shaped, a central angle of the arc is 45 °, a radius of the corresponding circle is one sixth of a circumference of the target workpiece 37, an upper end of the arc of the first bending punch 11 is tangent to a straight line parallel to an upper side surface of the alloy plate, and a position of the upper end of the arc of the first bending punch 11 opposite to the upper side surface of the alloy plate is a third circumference of the alloy plate from a central line, that is, a processing position of the first bending punch 11 is a position corresponding to the upper end of the arc of the first bending punch 11.

After the first punching and rounding, the two ends of the alloy plate in the width direction are preliminarily rounded, and the central angle of the formed arc is 45 degrees, so that a first-time rounding product 31 is obtained.

Referring to fig. 2, the step S3 is performed by using the apparatus shown in fig. 2, where the rolling and stamping device includes a second bending punch 12 and a second die 22, where the second die 22 is adapted to the second bending punch 12, and is capable of stamping and rolling an alloy sheet, where a portion of the second bending punch 12 and the second die 22 for stamping and rolling is in an arc shape, a central angle of the arc is 90 °, a radius of the corresponding circle is one sixth of a circumference of the target workpiece 37, an upper end of the arc of the second bending punch 12 is tangent to a straight line parallel to an upper side surface of the alloy sheet, and a position of the upper end of the arc of the second bending punch 12 opposite to the upper side surface of the alloy sheet is a sixth of a circumference of the alloy sheet from a center line, that is, a machining position of the second bending punch 12 is a position corresponding to the upper end of the arc of the second bending punch 12.

After the second punching and rounding, the two ends of the alloy plate in the width direction are further rounded, and the central angle of the formed arc is 90 degrees, so that a second rounded product 32 is obtained.

In the first stamping and rounding process and the second stamping and rounding process, the number of bending punches and female dies in one stamping die is two, so that stamping and rounding can be performed on both ends of the alloy plate in the width direction.

Referring to fig. 3, the step S4 is performed by using the apparatus shown in fig. 3, where the rolling and stamping device includes a third bending punch 13, a third die 23, and a first rolling round core 231, where the first rolling round core 231 is adapted to the third bending punch 13, and is capable of stamping and rolling an alloy plate, and a portion of the third bending punch 13 for stamping and rolling a round is in a circular arc shape, a central angle of the circular arc is 66 °, a radius of the corresponding circle is one sixth of a circumference of the target workpiece 37, a center of the circle corresponding to the first rolling round core 231 coincides with a center of the circle corresponding to the third bending punch 13, and the circular arc of the third bending punch 13 is in a symmetrical shape with a plane passing through the center in a vertical direction. The first rolling core 231 is used for supporting the secondary rolling product 32, and the middle part of the secondary rolling product 32 which is not bent yet can be rolled by the third bending punch 13.

Referring to fig. 4, the apparatus shown in fig. 4 is adopted to perform step S5, where the rolling and stamping device includes a fourth bending punch 14, a fourth die 24 and a second rolling core 241, the second rolling core 241 is adapted to the fourth bending punch 14 and the fourth die 24, and is capable of stamping and rolling an alloy plate, where the portions of the fourth bending punch 14 and the fourth die 24 for stamping and rolling are in an arc shape, and the arc of the fourth bending punch 14 and the arc of the fourth die 24 are symmetrical about a plane passing through the center of the second rolling core 241 in the vertical direction. The second rounding core 241 is used for supporting the third rounding product 33, and may perform rounding on the middle portion of the third rounding product 33 that has not been folded by the fourth folding punch 14. In step S5, a substantially circular tubular workpiece can be obtained, but in this case, the roundness tolerance of the workpiece is still large, and thus, it is necessary to shape the workpiece.

Referring to fig. 5, the step S6 is performed by using the apparatus shown in fig. 5, where the shaping and stamping device includes a first wedge-shaped punch 41, a first shaping slide 42, a first shaping round core 43 and a first pressing block 44, the fourth round product 34 is sleeved in the first shaping round core 43, after the fourth round product 34 is pressed by the first pressing block 44, two first shaping slide 42 located at the left and right sides of the fourth round product 34 are shaped by using the circular arc recesses on the two first shaping slide 42 under the action of the corresponding two first wedge-shaped punches 41, so as to obtain the primary shaped product 35.

Referring to fig. 6, a step S7 is performed by using the apparatus shown in fig. 6, wherein the shaping and stamping device includes a first shaping punch 15, a first shaping die 25 and a second shaping core 251, a primary shaping product 35 is sleeved into the second shaping core 251, and the upper and lower sides of the primary shaping product 35 are shaped by using the cooperation of the first shaping punch 15 and the second shaping punch, so as to obtain a secondary shaping product 26. The second shaping core 251 may be the first shaping core 43 in step S6, that is, in step S7, the primary shaping product 35 in step S6 and the first shaping core 43 may be directly taken out from the shaping and punching device together, and then subjected to the second punching and shaping.

Referring to fig. 7, the step S8 is performed by using the apparatus shown in fig. 7, where the shaping and stamping device includes a third wedge-shaped punch, a third shaping slide, a third shaping circular core 47 and a second pressing block 48, the secondary shaping product 26 is sleeved in the third shaping circular core 47, after the secondary shaping product 26 is pressed by the second pressing block 48, two third shaping slide located at the left and right sides of the secondary shaping product 26 are shaped by using the circular arc surfaces on the two third shaping slide under the action of the corresponding two third wedge-shaped punches, so as to obtain the target workpiece 37.

In the rolling method provided by the invention, firstly, an alloy plate with a specific width is cut, then the alloy plate is subjected to primary stamping rolling to obtain a primary rolling product 31, after the primary stamping rolling, the two ends of the alloy plate are preliminarily bent to be 45 degrees, then the primary rolling product 31 is subjected to secondary stamping rolling, the two ends of the alloy plate are further bent to be 90 degrees, then the secondary rolling product 32 is subjected to tertiary stamping rolling, the middle part of the alloy plate is started to be bent, the two ends are mutually close, then the tertiary rolling product 33 is subjected to tertiary stamping rolling, and the secondary stamping rolling is supported by a rolling core of the alloy plate, so that the alloy plate is preliminarily round; after finishing the four-round rolling process, the four-round rolled product 34 is subjected to stamping shaping, namely left-right shaping, up-down shaping and left-right shaping in sequence, and after the three shaping processes, the roundness tolerance of the finally obtained target workpiece 37 meets the requirement. In the above process, the corresponding stamping and rolling parameters are designed, the central angle, radius and stamping position of the stamping die are adjusted, and the roundness tolerance of the finally obtained target workpiece 37 is further reduced through repeated stamping and rolling and stamping and shaping.

The foregoing description of the embodiments and description is presented to illustrate the scope of the invention, but is not to be construed as limiting the scope of the invention. Modifications, equivalents, and other improvements to the embodiments of the invention or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the invention or the teachings of the embodiments, are intended to be included within the scope of the invention, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (6)

1. The alloy stamping and rounding method is characterized by comprising the following steps of:

s1, calculating perimeter cutting according to the radius of a target workpiece (37) to obtain alloy plates with corresponding widths;

s2, carrying out primary stamping and rounding on the alloy plate to obtain a primary rolled product (31), wherein the central angle of a stamping die is 45 degrees, the radius is one sixth of the circumference, and the stamping position is one third of the circumference position taking the central line of the alloy plate as a starting point;

s3, carrying out secondary punching and rounding on the primary rolled product (31) to obtain a secondary rolled product (32), wherein the central angle of a punching die is 90 degrees, the radius is one sixth of the circumference, and the punching position is one sixth of the circumference position taking the central line of the alloy plate as a starting point;

s4, carrying out third punching and rounding on the secondary rounding product (32) to obtain a third rounding product (33), wherein the central angle of a punching die is 66 degrees, the radius is one sixth of the circumference, and the punching position is the center line of the alloy plate;

s5, carrying out fourth punching and rounding on the third round product (33) to obtain a fourth round product (34), wherein the punching die is provided with a round core corresponding to the radius of the target workpiece (37), and the third round product (33) is punched to surround the round core;

s6, performing primary shaping on the four-time rolled product (34) to obtain a primary shaped product (35), wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece (37), and the shaping direction is the left side and the right side;

s7, performing secondary shaping on the primary shaping product (35) to obtain a secondary shaping product (26), wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece (37), and the shaping direction is the upper side and the lower side;

s8, performing third shaping on the secondary shaping product (26) to obtain a target workpiece (37), wherein the shaping die is provided with a female die corresponding to the radius of the target workpiece (37), and the shaping direction is the left side and the right side.

2. The method of claim 1, wherein in the steps S2 and S3, the product obtained in the previous step is punched and rolled at both ends in the width direction.

3. The method of rolling alloy stamping as set forth in claim 2, wherein in steps S2, S3, S4 and S5, rolling is performed by a rolling stamping device, the rolling stamping device includes a bending punch and a die, and the bending punch and the die cooperate to form the stamping die; in the steps S2, S3, and S4, the central angle of the stamping die refers to the central angle corresponding to the arc of the part on the bending punch and the concave die for stamping and rolling.

4. A method of alloy stamping and rounding as claimed in claim 3, characterized in that in steps S6 and S8, shaping is performed by a left and right shaping press including shaping slides for shaping the left and right sides of the fourth round product (34), wedge-shaped punches for driving the shaping slides, and shaping cores for supporting the fourth round product (34) and the second round product (26).

5. The method according to claim 4, wherein in the step S7, the shaping is performed by an upper and lower shaping press device, the upper and lower shaping press device includes a shaping punch, a shaping die, and a shaping core, the shaping punch and the shaping die cooperate to shape the upper and lower sides of the primary shaping product (35), and the shaping core in the upper and lower shaping press device is used for supporting the primary shaping product (35).

6. The method of claim 5, wherein in steps S1 to S8, the punching speed is 80SPM, and the tonnage is 110 tons.

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