CN111015129A - Spiral retainer ring manufacturing method - Google Patents
Spiral retainer ring manufacturing method Download PDFInfo
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- CN111015129A CN111015129A CN201911402780.1A CN201911402780A CN111015129A CN 111015129 A CN111015129 A CN 111015129A CN 201911402780 A CN201911402780 A CN 201911402780A CN 111015129 A CN111015129 A CN 111015129A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
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Abstract
The invention provides a method for manufacturing a spiral retainer ring, and relates to the technical field of part processing. The manufacturing method of the spiral retainer ring comprises the following steps: s1: sleeving a hollow strip-shaped structure which is spiral on the plane on a core rod, and fixing one end of the spiral strip-shaped structure on one side of the core rod; s2: the side of the helical ribbon-shaped structure far from the mandrel is rolled on the mandrel in a helical track along the length direction of the mandrel with one end of the helical ribbon-shaped structure fixed on the mandrel as a starting point, and is fixed into a hollow cylindrical structure with the same diameter. The invention solves the technical problems that in the winding process of the spiral retainer ring in the prior art, one side of a linear strip, which is far away from the core rod, can be subjected to larger tension and one side of the linear strip, which is close to the core rod, can be subjected to larger pressure, so that the belly plane of the processed spiral retainer ring can be skewed and twisted, and the processed spiral retainer ring can be cracked frequently, and the inner ring is folded or broken.
Description
Technical Field
The invention relates to the technical field of part processing, in particular to a method for manufacturing a spiral retainer ring.
Background
The spiral retainer ring is also called a spiral elastic retainer ring and is widely applied to mechanical assembly of valves, instruments, needle bearings, belt pulleys, quick connectors and the like. The spiral retainer ring is structurally shown in figure 1, and comprises a plurality of layers along the axial direction of the spiral retainer ring, and the diameters of the spiral retainer rings in each layer are equal.
The manufacturing process of the spiral retainer ring comprises a blanking process and a winding process which are sequentially carried out. The existing blanking process of the spiral check ring generally adopts a linear blanking mode, namely, linear strips are cut out from a plate-shaped material. The winding process of the spiral retainer ring comprises the following steps: fixing one end of a linear strip on one side of a core rod in a spiral retainer ring processing die, and enabling the plate surface of the linear strip to be vertical to the axial direction of the core rod; and then spirally winding a linear strip on the core rod along the length direction of the core rod. After the blanking process and the winding process, the linear strip can be processed into the spiral retainer ring.
However, in the winding process of the existing spiral retainer ring, one side of the linear strip, which is far away from the core rod, can be subjected to larger pulling force, and one side of the linear strip, which is close to the core rod, can be subjected to larger pressure, so that the belly plane of the processed spiral retainer ring generates skew torsion, and the processed spiral retainer ring often has the phenomenon that the outer ring cracks and the inner ring is folded or broken.
Disclosure of Invention
The invention aims to provide a spiral retainer ring manufacturing method, which aims to solve the technical problems that in the prior art, in the winding process of the existing spiral retainer ring, one side of a linear strip, which is far away from a core rod, can be subjected to a large tensile force, and one side of the linear strip, which is close to the core rod, can be subjected to a large pressure, so that the abdominal plane of the processed spiral retainer ring can be inclined and twisted, and the processed spiral retainer ring can be cracked frequently, and the inner ring is folded or broken.
The manufacturing method of the spiral retainer ring provided by the invention comprises the following steps:
s1: sleeving a hollow strip-shaped structure which is spiral on the plane on a core rod, and fixing one end of the spiral strip-shaped structure on one side of the core rod;
s2: the method comprises the steps of rolling the side of the spiral strip-shaped structure far away from the mandrel on the mandrel in a spiral track along the length direction of the mandrel by taking one end of the spiral strip-shaped structure fixed on the mandrel as a starting point, and fixing the spiral strip-shaped structure into a hollow cylindrical structure with the same diameter.
Further, the spiral retainer manufacturing method further includes, before the step S1, a step S0:
s0: a helical strip-like structure is cut into the sheet material.
Further, step S0 includes:
s01: determining the pitch of the helical ribbon structure;
s02: depending on the pitch, a helical strip-like structure of constant pitch is cut out on the plate-like material one turn at a time.
Further, in step S01:
acquiring the bandwidth, the blanking allowance and the machining allowance of the spiral retainer ring, and calculating the thread pitch based on the design width, the blanking allowance and the machining allowance of the spiral retainer ring as follows:
a＝(b+m1+m2)
in the formula: a is a screw pitch; b is the bandwidth of the spiral retainer ring; m is1M is the rest of the material1The value of (A) is selected according to the material and cutting mode of the plate-shaped material; m is2M is the processing allowance2The value of (a) is selected according to the bandwidth of the spiral retainer ring and the result of the rebound prediction.
Further, step S02 includes:
s020: determining the position of the spiral starting point on the plate-shaped material;
s021: determining the required length of the spiral strip-shaped structure;
s022: the spiral strip structure with the same pitch is cut on the plate-shaped material circle by circle according to the pitch, the position of the spiral starting point and the required length of the spiral strip structure.
Further, in step S020:
the inner diameter of the spiral retainer ring is obtained, and the curvature radius of the spiral starting point is calculated based on the inner diameter of the spiral retainer ring:
in the formula: r is2Radius of curvature which is the start of the helix; d1The inner diameter of the spiral retainer ring; u. of1Is a constant number u1>1，u1The value of (d) is selected based on the rebound prediction.
Further, in step S021:
acquire the bandwidth of spiral retaining ring, the internal diameter of spiral retaining ring and the number of turns of spiral retaining ring, based on the bandwidth of spiral retaining ring, the internal diameter of spiral retaining ring and the number of turns of spiral retaining ring, calculate the required length of spiral helicine area shape structure and be:
s＝π(d1+2b)(n1+u2)
in the formula: s is the length required by the spiral band-shaped structure; d1The inner diameter of the spiral retainer ring; b is the bandwidth n of the spiral retainer ring1The number of turns of the spiral retainer ring; u. of2Is a constant, 0.1<u2<1。
Further, step S021 is: determining the required length of the spiral strip-shaped structure, and based on the required length of the spiral strip-shaped structure, determining the position of the spiral terminal point of the spiral strip-shaped structure;
step S022 is: a helical strip-like structure of equal pitch is cut out on the plate-like material, one by one, according to the pitch, the position of the start point of the helix and the position of the end point of the helix.
Further, in step S021:
based on the radius of curvature of the start of the helix and the required length of the helical ribbon, the angle through which the end of the helix rotates relative to the start of the helix is calculated as:
in the formula: s is the length required by the spiral band-shaped structure; r is2Radius of curvature which is the start of the helix;
the position of the spiral end point of the spiral-shaped band structure is determined based on the position of the spiral start point and the angle of the spiral-shaped band structure that is rotated away from the spiral end point relative to the spiral start point.
Further, step S0 further includes:
s03: a fixed end point is selected on the plate-like material on the side of the spiral starting point facing away from the cutting path, and a clamping portion connected with the spiral-shaped strip-shaped structure is cut on the plate-like material at a position between the fixed end point and the spiral starting point.
The manufacturing method of the spiral retainer ring provided by the invention can produce the following beneficial effects:
the manufacturing method of the spiral retainer ring provided by the invention comprises the following steps: s1: sleeving a hollow strip-shaped structure which is spiral on the plane on a core rod, and fixing one end of the spiral strip-shaped structure on one side of the core rod. S2: the method comprises the steps of rolling the side of the spiral strip-shaped structure far away from the mandrel on the mandrel in a spiral track along the length direction of the mandrel by taking one end of the spiral strip-shaped structure fixed on the mandrel as a starting point, and fixing the spiral strip-shaped structure into a hollow cylindrical structure with the same diameter. After the steps S1 and S2 are completed, the obtained hollow cylindrical structure with the same diameter is the spiral retainer ring. In the present invention, the strip material used for winding the spiral retainer ring has a spiral strip structure, and the shape of the spiral strip structure of the present invention is closer to the shape of the spiral retainer ring than the linear strip material of the prior art. In the process of winding the spiral retainer ring, the stress on the tension side and the compression side of the spiral strip-shaped structure is small, the deformation degree of the spiral strip-shaped structure is small, the ventral plane of the spiral retainer ring obtained after winding is not prone to skew torsion, and the phenomenon that the outer ring is cracked and the inner ring is folded or cracked is not prone to occurring in the spiral retainer ring obtained after winding.
Compared with the prior art, the spiral retainer ring manufacturing method provided by the invention can be used for winding the spiral retainer ring by utilizing the spiral strip-shaped structure which is closer to the shape of the spiral retainer ring. In the process of winding the spiral retainer ring, compared with a linear strip material in the prior art, the spiral strip structure adopted in the invention has smaller deformation degree, so that the web plane of the spiral retainer ring obtained after winding is not easy to skew and twist, and the phenomenon that the outer ring is cracked and the inner ring is folded or cracked is not easy to occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a spiral retainer ring;
fig. 2 is a schematic flow chart of a manufacturing method of a spiral retainer ring according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a method for manufacturing a spiral retainer according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a spiral ribbon structure provided in an embodiment of the present invention;
fig. 5 is a schematic structural view of the spiral band structure in fig. 4.
Icon: 1-a helical ribbon-like structure; 10-a clamping part.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 2, the method for manufacturing a spiral retainer ring according to this embodiment includes:
s1: sleeving a hollow strip-shaped structure which is spiral on the plane on a core rod, and fixing one end of the spiral strip-shaped structure on one side of the core rod;
s2: the method comprises the steps of rolling the side of the spiral strip-shaped structure far away from the mandrel on the mandrel in a spiral track along the length direction of the mandrel by taking one end of the spiral strip-shaped structure fixed on the mandrel as a starting point, and fixing the spiral strip-shaped structure into a hollow cylindrical structure with the same diameter.
After the steps S1 and S2 are completed, the obtained hollow cylindrical structure with the same diameter is the spiral retainer ring. The construction of the spiral retainer is shown in figure 1. The strip material used for winding the spiral retainer ring in the present embodiment is a spiral strip structure as shown in fig. 4 and 5, and the shape of the spiral strip structure 1 in the present embodiment is closer to the shape of the spiral retainer ring than the prior art straight strip material. In the process of winding the spiral retainer ring, the stress on the tension side and the stress side of the spiral strip-shaped structure 1 is small, the deformation degree of the spiral strip-shaped structure 1 is small, not only can the ventral plane of the spiral retainer ring obtained after winding not be prone to skew torsion, but also the spiral retainer ring obtained after winding is not prone to outer ring cracking and inner ring folding or cracking.
Compared with the prior art, the spiral retainer manufacturing method provided by the embodiment can be used for winding the spiral retainer by using the spiral strip-shaped structure 1 which is closer to the shape of the spiral retainer. In the process of winding the spiral retainer ring, compared with a linear strip material in the prior art, the spiral strip structure 1 adopted in the embodiment has smaller deformation degree, so that the web plane of the spiral retainer ring obtained after winding is not easy to skew and twist, and the phenomenon that the outer ring is cracked and the inner ring is folded or cracked is not easy to occur.
In addition, the linear strip material after blanking in the prior art has a long length, and the plate-shaped material with larger size needs to be customized generally. However, when a small batch of spiral retainer rings is required to be produced, in order to meet the production requirement and meet the requirements of manufacturers, plate-shaped materials with larger sizes still need to be customized, and not only a longer production period is required, but also more production cost is required. In the method for manufacturing the spiral retainer ring, the spiral strip-shaped structure 1 can be cut on the plate-shaped material, so that compared with a linear strip material in the prior art, the method has the advantages that the requirement on the length of the plate-shaped material is smaller, the plate-shaped material with larger size does not need to be customized, the production requirement of small-batch spiral retainer rings can be met, the production period is shortened, and the production cost is saved.
It can be seen that the method for manufacturing the spiral retainer ring according to the embodiment alleviates the technical problems that in the winding process of the existing spiral retainer ring in the prior art, one side of a linear strip, which is far away from a core rod, can be subjected to a large tensile force, and one side of the linear strip, which is close to the core rod, can be subjected to a large pressure, so that a belly plane of the processed spiral retainer ring generates a skew torsion, and the processed spiral retainer ring often has the phenomenon that an outer ring is cracked and an inner ring is folded or broken.
As shown in fig. 2, the method for manufacturing a spiral retaining ring according to this embodiment further includes, before the step S1, a step S0:
s0: a helical strip-shaped structure 1 is cut out of a plate-shaped material.
Step S0 is a blanking process in the spiral retainer manufacturing method provided in this embodiment. The plate-shaped material can be a metal plate or an alloy plate, such as a nickel-based alloy with the model number GH 4169. When the strip-shaped structure 1 is cut into a plate-shaped material in a spiral shape, the cutting can be performed by using a molybdenum wire.
As shown in fig. 4, the strip-shaped structure 1 cut in a spiral shape in step S0 is approximately in the shape of an archimedean spiral. The spiral band-shaped structure 1 cut out from the plate-like material after the step S0 is shown in fig. 5. It can be seen that, compared to the shape of the linear strip material after blanking in the prior art, after the blanking process is completed in step S0 of the spiral check ring manufacturing method provided in the present embodiment, the shape of the spiral strip-shaped structure 1 for winding the spiral check ring is obtained to be closer to the shape of the spiral check ring. Therefore, in the process of winding the spiral retainer ring, compared with the prior art, the stress on the tension side and the stress side of the spiral strip-shaped structure 1 in the embodiment is smaller, and the deformation degree of the spiral strip-shaped structure 1 is smaller, so that not only can the ventral plane of the spiral retainer ring obtained after winding be not prone to skew and torsion, but also the spiral retainer ring obtained after winding is not prone to outer ring cracking and inner ring folding or cracking.
Step S0 includes:
s01: determining the pitch of the helical strip-shaped structure 1;
s02: depending on the pitch, a helical strip-shaped structure 1 with a constant pitch is cut out from the plate-shaped material in turns.
When the pitch is determined in step S01, it is determined that the size of the helical circlip is smaller than the predetermined size in order to prevent the helical band structure 1 from being worn during the cutting and winding process and the size of the helical circlip is smaller than the predetermined size, according to the width of the preformed helical circlip (the width of the helical circlip is equal to half of the difference between the inner diameter and the outer diameter of any turn of the band material of the helical circlip).
After steps S01 and S02, the spiral ribbon-like structure 1 cut out from the plate-like material is a spiral ribbon-like structure 1 having a constant pitch, and the width of the spiral ribbon-like structure 1 is equal for each turn of the ribbon. Since the width of each coil of the spiral band-shaped structure 1 is equal, so as to manufacture spiral retainers with the same width of each coil of the band-shaped structure, the step S0 of the present embodiment preferably includes the steps S01 and S02.
Further, when determining the pitch of the helical ribbon-like structure 1, the following is used:
acquiring the bandwidth, the blanking allowance and the machining allowance of the spiral retainer ring, and calculating the thread pitch based on the design width, the blanking allowance and the machining allowance of the spiral retainer ring as follows:
a＝(b+m1+m2) (1)
in the formula: a is a screw pitch; b is the bandwidth of the spiral retainer ring; m is1M is the rest of the material1The value of (A) is selected according to the material and cutting mode of the plate-shaped material; m is2M is the processing allowance2The value of (a) is selected according to the bandwidth of the spiral retainer ring and the result of the rebound prediction.
In the above formula (1), the blanking allowance and the machining allowance are taken into consideration when determining the screw pitch. Wherein, when the blanking allowance is used for cutting the plate-shaped material, a wound-accommodating area is provided for the damage to the spiral belt-shaped structure 1 in the cutting process. When the machining allowance is used for winding the plate-shaped material, a damage-tolerant area is provided for the damage to the spiral strip-shaped structure 1 in the winding process.
The processing allowance can also enable the bandwidth of the wound spiral strip-shaped structure 1 to be equal to or slightly larger than the preset bandwidth of the spiral retainer ring, and the situation that the bandwidth of the wound spiral strip-shaped structure 1 cannot meet the preset bandwidth requirement of the spiral retainer ring is prevented. When the band width of the wound spiral band-shaped structure 1 is slightly larger than the preset band width of the spiral retainer ring, the wound spiral band-shaped structure 1 can be cut and modified to enable the size of the wound spiral band-shaped structure 1 to be equal to that of the spiral retainer ring.
When pitch is determined, m1The value of (b) can be selected on the basis of the material and cutting mode of the plate-shaped material on the existing blanking allowance standard manual. m is2The value of (d) may be appropriately selected according to the bandwidth of the spiral retainer.
Further, as shown in fig. 3, step S02 includes:
s020: determining the position of the spiral starting point on the plate-shaped material;
s021: determining the required length of the spiral strip-shaped structure 1;
s022: the helical strip structure 1 of equal pitch is cut out on the plate-like material, loop by loop, depending on the pitch, the position of the start of the helix and the required length of the helical strip structure 1.
According to the steps S020, S021 and S022, the spiral strip-shaped structure 1 with the size being larger than that of the spiral retainer ring can be cut on the plate-shaped material, so that the shape modification work after winding can be simplified, the spiral retainer ring conforming to the design size can be conveniently manufactured, and the production efficiency is improved.
As shown in fig. 4, when determining the position of the spiral start point on the plate-like material, the determination may be made in the following manner:
the inner diameter of the spiral retainer ring is obtained, and the curvature radius of the spiral starting point is calculated based on the inner diameter of the spiral retainer ring:
in the formula: r is2Radius of curvature which is the start of the helix; d1The inner diameter of the spiral retainer ring; u. of1Is a constant number u1>1，u1The value of (d) is selected based on the rebound prediction.
The above-mentioned springback prediction process is performed by using the existing springback prediction method, and therefore the specific process of springback prediction is not described in detail in this embodiment.
As shown in FIG. 4, the position of the spiral start point on the plate-like material is denoted by P1. Since the curvature radius is different at each point on the spiral strip-shaped structure 1, P is determined1After the corresponding value of the radius of curvature, P1The position of the point may also be determined.
Wherein P is marked on the plate-like material1The course of points may be determined using computer graphics software.
When determining the required length of the helical strip-shaped structure 1, this is determined in the following manner:
acquire the bandwidth of spiral retaining ring, the internal diameter of spiral retaining ring and the number of turns of spiral retaining ring, based on the bandwidth of spiral retaining ring, the internal diameter of spiral retaining ring and the number of turns of spiral retaining ring, calculate the required length of spiral helicine banding structure 1 and be:
s＝π(d1+2b)(n1+u2) (3)
in the formula: s is the length required by the spiral band-shaped structure 1; d1The inner diameter of the spiral retainer ring; b is the bandwidth n of the spiral retainer ring1The number of turns of the spiral retainer ring; u. of2Is a constant, 0.1<u2<1。
After the spiral starting point and the required length of the spiral strip-shaped structure 1 are determined, the path of the spiral strip-shaped structure 1 can be determined, and the plate obtained by cutting along the path is the spiral strip-shaped structure 1.
Since the process of determining the path corresponding to the required length of the spiral strip-shaped structure 1 is complicated, the step S021 is preferably as follows: the desired length of the helical band-shaped structure 1 is determined and the position of the end point of the helix of the helical band-shaped structure 1 is based on the desired length of the helical band-shaped structure 1. Correspondingly, step S022 is: a helical strip-shaped structure 1 of equal pitch is cut out on the plate-shaped material, one by one, according to the pitch, the position of the start point of the helix and the position of the end point of the helix.
In step S021, the angle at which the spiral end of the spiral strip structure 1 rotates with respect to the spiral start point can be determined according to the required length of the spiral strip structure 1, and the position of the spiral end of the spiral strip structure 1 can be determined. Here, as shown in FIG. 4, the position of the spiral end point of the spiral ribbon-shaped structure 1 is denoted by P2。
The angle of rotation of the spiral end point of the spiral strip-shaped structure 1 relative to the spiral starting point is determined based on the required length of the spiral strip-shaped structure 1, so that the position of the spiral end point of the spiral strip-shaped structure 1 on the plate-shaped material can be conveniently determined, and the spiral strip-shaped structure 1 can be conveniently cut on the plate-shaped material.
When determining the required length of the helical strip structure 1 and the position of the end point of the helix of the helical strip structure 1 on the basis of the required length of the helical strip structure 1, the determination is made in the following manner:
based on the radius of curvature of the start point of the helix and the required length of the helical ribbon structure 1, the angle through which the end point of the helix is rotated relative to the start point of the helix is calculated as:
in the formula: s is the length required by the spiral band-shaped structure 1; r is2Is the radius of curvature of the start of the helix.
Wherein, S can be determined according to the length of the spiral retainer ring.
After the angle of rotation of the spiral end point with respect to the spiral start point is calculated, the position of the spiral end point of the spiral band structure 1 is determined based on the position of the spiral start point.
The following description will be given of a process of cutting a spiral strip-shaped structure 1 on a plate-shaped material, taking a nickel-based alloy of GH4169 type as a material of the plate-shaped material, wherein the cutting mode is molybdenum wire cutting, the inner diameter of a spiral retainer ring is 113mm (millimeter), the width of the spiral retainer ring is 9mm, and the number of turns of the spiral retainer ring is 2 as an example:
in the embodiment, the nickel-based alloy plate of GH4169 model is cut by molybdenum wire cutting, so that the conventional blanking allowance manual is consulted, and the blanking allowance m is taken10.2 mm. Because the bandwidth of the spiral retainer ring is 9mm, the processing allowance m is taken in consideration of the damage to the inner edge and the outer edge of the spiral strip-shaped structure 1 in the winding process and the influence of the bandwidth change on the resilience of the wound strip2The pitch of the constant-pitch helical ribbon structure 1 can be calculated from equation (1) as "a" ═ 1mm ═ b + m1+m2)＝10.2mm。
Since the inner diameter of the spiral retainer ring is smaller, u is taken in the example in combination with the rebound prediction result11.2. Will u1＝1.2，d1By substituting 113mm into the formula (2), P of the spiral band structure 1 can be obtained1Radius of curvature at location
The plate-shaped material can then be provided with a radius of curvature r determined by computer graphics software2Is the point of P1And (4) point.
Taking n as the number of turns of the spiral retainer ring22; to ensure that the helical ribbon-like structure 1 has a sufficient margin in its length direction, a constant u is taken20.75. Will d1＝113mm，b＝9mm，n2＝2，u2When the value of pi is substituted into the formula (3) to 0.75, the length s required for the spiral ribbon structure 1 becomes 1131.2 mm.
Changing s to 1131.2mm, r2By substituting 67.8mm into equation (4), the angle θ at which the spiral end point of the spiral ribbon structure 1 rotates relative to the spiral start point becomes 956.4 °.
Then with P1P is determined by rotating the plate-like material by an angle theta as a starting point2The position of (a).
P1And P2After all the positions of (a) and (b) are determined, a spiral strip-shaped structure 1 is obtained by cutting the plate-shaped material, and the inner diameter of the spiral retainer ring obtained by winding the spiral strip-shaped structure 1 on a mandrel is 112.6 mm.
According to practical experiments, the inner edge of the spiral retainer ring manufactured according to the process is not wrinkled, the outer edge of the spiral retainer ring is not cracked, and the ventral plane of the spiral retainer ring is not skewed.
And (4) continuously carrying out finish machining on the spiral retainer ring to obtain the spiral retainer ring with the size and performance meeting the requirements.
As shown in fig. 3, step S0 further includes:
s03: a fixed end point is selected on the plate-shaped material on the side facing away from the cutting path at the start of the helix, and a clamping portion 10 connected to the helical band-shaped structure 1 is cut out of the plate-shaped material at a position between the fixed end point and the start of the helix.
Step S03 is for P in the helical ribbon structure 11 A clamping part 10 is reserved on one side of the end part where the point is located, and the clamping part 10 is convenient for fixing the position of the spiral strip-shaped structure 1 in the winding process, so that the winding process is convenient to carry out.
Wherein the distance P of the clamping part 101The position of one end of the point may be determined according to the following:
the center of the helix is connected with P1And (4) dot connecting lines, and making a perpendicular line of the connecting lines on the plate-shaped material. Then is positioned on the vertical line at P1Marking the side of the point facing away from the cutting path with a distance P1A point at a certain distance, which is the distance P from the clamping part 101The position of one end of the dot.
Wherein, in order to improve the clamping effect, P1Point to point away from the nip 101The distance between one end of the dots may be 20mm to 70mm, and the present embodiment is preferably 30 mm.
In the conventional process for manufacturing a spiral retainer, the deformation process of a linear strip is consideredIn general, a core rod having a relatively small diameter is used. If the spiral retainer ring is produced by using the spiral retainer ring manufacturing method provided by the embodiment, because the deformation degree of the spiral strip-shaped structure 1 obtained in the blanking process in the embodiment is small, the winding process is still completed by using the existing core rod, and the situation that the diameter of the wound spiral retainer ring is small easily occurs. Therefore, when the spiral retainer is produced by the spiral retainer manufacturing method provided in the present embodiment, the diameter of the mandrel bar should be increased appropriately, or alternatively, the constant u in the formula (2) may be adjusted1The radius of curvature of the helical band-shaped structure 1 is changed so that a helical collar having a diameter corresponding to the design size can be obtained.
Wherein the diameter of the core rod is increased by a value and constant u1The value of the spiral retainer ring can be calculated by existing finite element software, or a plurality of spiral retainer rings can be manufactured firstly for testing according to the spiral retainer ring manufacturing method provided by the embodiment, and then the value is selected according to the test result.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of manufacturing a spiral retainer ring, comprising:
s1: sleeving a hollow strip-shaped structure which is spiral on the plane on a core rod, and fixing one end of the spiral strip-shaped structure on one side of the core rod;
s2: and rolling the side edge of the spiral strip-shaped structure far away from the mandrel on the mandrel along the length direction of the mandrel by taking one end of the spiral strip-shaped structure fixed on the mandrel as a starting point, and fixing the spiral strip-shaped structure into a hollow cylindrical structure with the same diameter.
2. The spiral retainer manufacturing method according to claim 1, further comprising, before the step S1, a step S0 of:
s0: the helical strip-like structure is cut out of a plate-like material.
3. The method of manufacturing a spiral retainer ring according to claim 2, wherein the step S0 includes:
s01: determining a pitch of the helical ribbon structure;
s02: and cutting the spiral strip-shaped structure with the same pitch on the plate-shaped material circle by circle according to the pitch.
4. The method of manufacturing a spiral retainer ring according to claim 3, wherein in step S01:
acquiring the bandwidth, the blanking allowance and the machining allowance of the spiral retainer ring, and calculating the thread pitch based on the design width, the blanking allowance and the machining allowance of the spiral retainer ring as follows:
a＝(b+m1+m2)
in the formula: a is the pitch; b is the bandwidth of the spiral retainer ring; m is1M is the rest of the material1The value of (A) is selected according to the material and cutting mode of the plate-shaped material; m is2M is the processing allowance2The value of (d) is selected according to the bandwidth of the spiral retainer ring and the result of the rebound prediction.
5. The method of manufacturing a spiral retainer ring according to claim 3, wherein the step S02 includes:
s020: determining the position of the spiral starting point on the plate-shaped material;
s021: determining the required length of the helical ribbon structure;
s022: cutting the helical strip structure of equal pitch on the plate-like material from turn to turn according to the pitch, the position of the start of the helix and the required length of the helical strip structure.
6. The method of manufacturing a spiral retaining ring according to claim 5, wherein in step S020:
acquiring the inner diameter of the spiral retainer ring, and calculating the curvature radius of the spiral starting point based on the inner diameter of the spiral retainer ring as follows:
in the formula: r is2The radius of curvature of the start of the helix; d1The inner diameter of the spiral retainer ring; u. of1Is a constant number u1>1，u1The value of (d) is selected based on the rebound prediction.
7. The method of manufacturing a spiral retainer ring according to claim 6, wherein in step S021:
acquiring the bandwidth of the spiral retainer ring, the inner diameter of the spiral retainer ring and the number of turns of the spiral retainer ring, and calculating the required length of the spiral strip-shaped structure based on the bandwidth of the spiral retainer ring, the inner diameter of the spiral retainer ring and the number of turns of the spiral retainer ring:
s＝π(d1+2b)(n1+u2)
in the formula: s is the length required by the helical ribbon structure; d1The inner diameter of the spiral retainer ring; b is the bandwidth n of the spiral retainer ring1The number of turns of the spiral retainer ring is set; u. of2Is a constant, 0.1<u2<1。
8. The method for manufacturing a spiral retainer ring according to claim 7, wherein the step S021 is: determining a desired length of the helical ribbon structure and a position of a helical terminus of the helical ribbon structure based on the desired length of the helical ribbon structure;
step S022 is: and cutting the spiral strip-shaped structure with the same pitch on the plate-shaped material circle by circle according to the pitch, the position of the spiral starting point and the position of the spiral terminal point.
9. The method of manufacturing a spiral retainer ring according to claim 8, wherein in step S021:
based on the radius of curvature of the spiral starting point and the required length of the helical ribbon structure, calculating the angle through which the spiral ending point rotates relative to the spiral starting point as:
in the formula: s is the length required by the helical ribbon structure; r is2The radius of curvature of the start of the helix;
determining a position of a spiral ending point of the spiral ribbon structure based on the position of the spiral starting point and an angle of the spiral ribbon structure rotated away from the spiral ending point relative to the spiral starting point.
10. The method for manufacturing a spiral retainer ring according to claim 5, wherein the step S0 further includes:
s03: a fixed end point is selected on the plate-like material on the side of the spiral starting point facing away from the cutting path, and a clamping portion connected with a spiral-shaped strip-shaped structure is cut on the plate-like material at a position between the fixed end point and the spiral starting point.
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| CN1384780A (en) * | 1999-09-07 | 2002-12-11 | 不二精工株式会社 | Method and device for manufacturing belt material for tire |
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