CN114369939A - Manufacturing method and device of felt sealing ring for aviation and stamping die - Google Patents
Manufacturing method and device of felt sealing ring for aviation and stamping die Download PDFInfo
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- CN114369939A CN114369939A CN202111268222.8A CN202111268222A CN114369939A CN 114369939 A CN114369939 A CN 114369939A CN 202111268222 A CN202111268222 A CN 202111268222A CN 114369939 A CN114369939 A CN 114369939A
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- Prior art keywords
- die
- annular
- hole
- female die
- roasting
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C25/00—Treating selvedges or other edges, e.g. stiffening
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C9/00—Singeing
- D06C9/04—Singeing by contact with heated elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/20—Packing materials therefor
- F16J15/22—Packing materials therefor shaped as strands, ropes, threads, ribbons, or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
The invention relates to a manufacturing method and a manufacturing device of a sealing ring, in particular to a manufacturing method, a manufacturing device and a punching die of a felt sealing ring for aviation, which overcome the problems that an inner hole of the felt sealing ring processed by the existing method is easy to fall down and the shape and the size are unstable. The method comprises the steps of blanking felt into annular blanks by a stamping die according to the drawing of the part, placing the annular blanks in a roasting fixture, and roasting, inspecting and infiltrating. The device comprises a die and a roasting clamp; the male die and the female die in the stamping die both adopt oblique cutting edges, so that the blanking section of the felt is straight and has small deformation, higher dimensional accuracy can be obtained, and meanwhile, the male die, the female die and the supporting block are coaxial and have radial fit clearance, so that the blanking end face of the annular blank is straight. The annular blank is roasted by adopting the roasting fixture, redundant broken filaments in the inner hole are removed, and shaping is realized, so that the sealing ring manufactured by the invention has no protruding broken filaments in the inner hole, does not fall hair, and has stable shape and size.
Description
Technical Field
The invention relates to a manufacturing method and a manufacturing device of a sealing ring, in particular to a manufacturing method and a manufacturing device of a felt sealing ring for aviation.
Background
The purpose of the felt sealing ring is to lubricate the adjuster guide rod and prevent dust and other dirt from falling between the guide rod and the bushing. The material is industrial fine felt (made by natural wool through felting and bonding), the grade is 112-44, and the thickness is 2.5 +/-0.5 mm. The conventional manufacturing method of the felt sealing ring at present comprises the following steps: firstly, the felt is cut into the required annular blank, and then the annular blank is soaked by lubricating grease to form the fabric. The sealing ring manufactured by the method has a plurality of protruding broken filaments in the inner hole and is unstable in shape and size; therefore, in the working process of the regulator, the inner hole of the sealing ring is easy to fall off, so that the guide rod is not flexible to move or redundant substances are generated to cause secondary damage. Therefore, in order to ensure the reliable and stable operation of the regulator, the manufacturing of the sealing ring with stable shape and size and without inner hole hair falling is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a method and a device for manufacturing a felt sealing ring for aviation, which aim to solve the problems that an inner hole of the felt sealing ring processed by the existing method is easy to fall down and the shape and the size are unstable.
The technical scheme of the invention provides a manufacturing method of an aeronautical felt sealing ring, which is characterized by comprising the following steps:
step 1, preparing a blank;
blanking the felt into an annular blank by using a stamping die according to a part drawing;
the stamping die comprises an upper template, a fixing plate, a female die, a piece withdrawing device, a male die, a lower template, a supporting block, a discharging plate and a supporting column;
the fixing plate is fixed on the upper template;
the female die is fixed on the fixing plate and located right below the fixing plate, a circular step through hole is formed in the center of the female die, the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end face of the female die, which is close to the small end of the circular step through hole, is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die;
the male die comprises a cylindrical processing head, the diameter of the processing head is matched with the aperture of an inner hole of the part withdrawing device, one end of the processing head is fixed on the fixing plate, and the other end of the processing head is sleeved in the inner hole of the part withdrawing device; the end part of the other end of the processing head is recessed inwards to form an inclined edge of the male die, the section of the recessed part along the axial direction of the male die is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the processing head;
the inclined cutting edge of the male die is flush with the inclined cutting edge of the female die, and when the upper die plate moves downwards, the inclined cutting edges of the male die and the female die simultaneously contact with a material to be punched to complete punching;
the supporting block is fixedly arranged on the lower template, a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole on the female die, the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole of the female die; the supporting block does not participate in shearing processing in the blanking process, and only plays a role of supporting materials;
the discharging plate is sleeved on the supporting block and used for pushing the blanking waste edge out of the annular plane of the supporting block;
the number of the support columns is at least three, the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; in the operation process of the die, the supporting column is firstly contacted with the female die to push the stripper plate to move downwards, so that the effect of protecting the inclined cutting edge of the female die is achieved;
step 2, roasting;
placing the annular blank prepared in the step 1 into a roasting fixture for roasting;
the roasting fixture comprises a roasting chamber and a core rod;
the roasting chamber is used for fixing a plurality of annular blanks prepared in the step 1 and comprises a base, a lining and a pressing plate, and the aperture of an inner hole of the lining is slightly larger than the outer diameter of the annular blanks so as to ensure that the annular blanks can be coaxially arranged in the lining along the axial direction of the lining; one end of the bushing is fixed on the base, and the other end of the bushing is matched with the pressing plate; through holes coaxial with the axial center line of the roasting chamber are formed in the base and the pressing plate; the aperture of the through hole is matched with the diameter of the core rod, so that the core rod can pass through the through hole;
the core rod is used for being matched with the roasting chamber to remove broken filaments protruding from the inner hole of the annular blank, the diameter of the core rod is slightly smaller than the inner diameter of the annular blank, and the core rod can smoothly penetrate through the inner hole of the annular blank when penetrating into the roasting chamber;
the specific roasting process is as follows:
step 2.1, firstly fixing a bushing on a base, then coaxially arranging a plurality of annular blanks prepared in the step 1 in the bushing along the axial direction of the bushing, then fixing a pressing plate at the other end of the bushing, and axially pressing the plurality of annular blanks;
2.2, heating the core rod to 350-370 ℃, preserving heat for 7-10 minutes, taking out the core rod, inserting the core rod into the roasting chamber through the through hole of the pressing plate, ensuring that the core rod passes through the inner holes of the annular blanks, keeping for 3-5 seconds, burning out the hair filaments protruding from the inner holes of the annular blanks, fixing the shape, drawing out the core rod, taking out the processed workpiece to obtain a roasted felt sealing ring, wherein the burning part is bright brown;
step 3, checking;
visually checking that no protruding broken filaments exist in the inner hole of the felt sealing ring, checking the size of the burned felt sealing ring by using a caliper, and entering the step 4 if the size accords with a product design drawing;
step 4, infiltration;
and soaking the roasted felt sealing ring in lubricating grease specified by a product design drawing to obtain a target product.
Further, in the step 2, the roasting fixture further comprises an ejector rod, the ejector rod is used for pushing the annular blank into the roasting chamber before roasting, and pushing the roasted felt sealing ring out of the roasting chamber after roasting; in the step 2.1, a lining is fixed on a base, and then a plurality of annular blanks prepared in the step 1 are coaxially arranged in the lining along the axial direction of the lining by utilizing an ejector rod; and 2.2, taking out the processed workpiece by using the ejector rod to obtain the roasted felt sealing ring.
Further, in the step 2, the base of the roasting chamber, the pressing plate and the matching part of the lining are matched in a way of H8/H8; the ejector pin is matched with the working part of the bush H9/H9. In step 2, the inner diameter of the lining of the roasting cavity is 1mm larger than the outer diameter of the annular blank, and the diameter of the core rod is 1mm smaller than the inner diameter of the annular blank. In the step 2, the core rod in the roasting fixture is made of hot-work die steel H13, and the hardness is HRC 46-50. In the step 1, the support block in the punching die is a steel support block.
Further, in the step 1, the male die, the female die and the steel supporting block are all made of HSB CD2, and the hardness is HRC 58-62. The inclination angle of the inclined edge of the female die is 25 +/-2 degrees; the inclined angle of the inclined edge of the male die is 15 degrees +/-2 degrees.
In order to further ensure that the punched section is straight, in the step 1, the inner diameter of the annular plane on the upper end surface of the supporting block is 0.03mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the step through hole of the female die.
The invention also provides a device for manufacturing the aeronautical felt sealing ring, which is characterized by comprising a punching die and a roasting clamp; the punching die is used for processing the annular blank, and the roasting fixture is used for roasting the annular blank and removing broken filaments protruding from the inner hole of the annular blank;
the stamping die comprises an upper template, a fixing plate, a female die, a piece withdrawing device, a male die, a lower template, a supporting block, a discharging plate and a supporting column;
the fixing plate is fixed on the upper template;
the female die is fixed on the fixing plate and located below the fixing plate, a circular step through hole is formed in the center of the female die, the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end face of the female die, which is close to the small end of the circular step through hole, is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die;
the male die comprises a cylindrical processing head, the diameter of the processing head is matched with the aperture of an inner hole of the part withdrawing device, one end of the processing head is fixed on the fixing plate, and the other end of the processing head is sleeved in the inner hole of the part withdrawing device; the end part of the other end of the processing head is recessed inwards to form an inclined edge of the male die, the section of the recessed part along the axial direction of the male die is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the processing head;
the inclined cutting edge of the male die is flush with the inclined cutting edge of the female die, and when the upper die plate moves downwards, the inclined cutting edges of the male die and the female die simultaneously contact with a material to be punched to complete punching;
the supporting block is fixedly arranged on the lower template, a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole on the female die, the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole of the female die; the supporting block does not participate in shearing processing in the blanking process, and only plays a role of supporting materials;
the discharging plate is sleeved on the supporting block and used for pushing the blanking waste edge out of the annular plane of the supporting block;
the number of the support columns is at least three, the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; in the operation process of the die, the supporting column is firstly contacted with the female die to push the stripper plate to move downwards, so that the effect of protecting the inclined cutting edge of the female die is achieved;
the roasting fixture comprises a roasting chamber and a core rod;
the roasting chamber is used for fixing a plurality of annular blanks prepared in the step 1 and comprises a base, a lining and a pressing plate, and the aperture of an inner hole of the lining is slightly larger than the outer diameter of the annular blanks so as to ensure that the annular blanks can be coaxially arranged in the lining along the axial direction of the lining; one end of the bushing is fixed on the base, and the other end of the bushing is matched with the pressing plate; through holes coaxial with the axial center line of the roasting chamber are formed in the base and the pressing plate; the aperture of the through hole is matched with the diameter of the core rod, so that the core rod can pass through the through hole;
the core rod is used for being matched with the roasting chamber to remove the broken filaments protruding from the inner hole of the annular blank, the diameter of the core rod is slightly smaller than the inner diameter of the annular blank, and the core rod can smoothly penetrate through the inner hole of the annular blank when penetrating into the roasting chamber.
Furthermore, the roasting fixture also comprises an ejector rod which is used for pushing the workpiece into the roasting cavity before roasting and pushing the workpiece out of the roasting cavity after roasting. The base and the pressing plate of the roasting chamber are matched with the matching part of the lining sleeve H8/H8; the ejector pin is matched with the working part of the bush H9/H9. The inner diameter of the lining of the roasting cavity is 1mm larger than the outer diameter of the annular blank, and the diameter of the core rod is 1mm smaller than the inner diameter of the annular blank. The core rod in the roasting fixture is made of hot-work die steel H13, and the hardness is HRC 46-50. The supporting block in the punching die is a steel supporting block.
Furthermore, the male die, the female die and the steel supporting block are all made of HSB CD2, and the hardness is HRC 58-62; the inclination angle of the inclined edge of the female die is 25 +/-2 degrees; the inclined angle of the inclined edge of the male die is 15 degrees +/-2 degrees.
Furthermore, the inner diameter of the annular plane on the upper end face of the supporting block is 0.03mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the step through hole of the female die.
The invention also provides a punching die for processing the aviation felt sealing ring blank, which is characterized in that: the device comprises an upper template, a fixing plate, a female die, a piece withdrawing device, a male die, a lower template, a supporting block, a discharging plate and a supporting column;
the fixing plate is fixed on the upper template;
the female die is fixed on the fixing plate and located below the fixing plate, a circular step through hole is formed in the center of the female die, the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end face of the female die, which is close to the small end of the circular step through hole, is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die;
the male die comprises a cylindrical processing head, the diameter of the processing head is matched with the aperture of an inner hole of the part withdrawing device, one end of the processing head is fixed on the fixing plate, and the other end of the processing head is sleeved in the inner hole of the part withdrawing device; the end part of the other end of the processing head is recessed inwards to form an inclined edge of the male die, the section of the recessed part along the axial direction of the male die is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the processing head;
the inclined cutting edge of the male die is flush with the inclined cutting edge of the female die, and when the upper die plate moves downwards, the inclined cutting edges of the male die and the female die simultaneously contact with a material to be punched to complete punching;
the supporting block is fixedly arranged on the lower template, a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole on the female die, the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole of the female die; the supporting block does not participate in shearing processing in the blanking process, and only plays a role of supporting materials;
the discharging plate is sleeved on the supporting block and used for pushing the blanking waste edge out of the annular plane of the supporting block;
the number of the support columns is at least three, the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; during the operation of the die, the supporting columns are firstly contacted with the female die to push the stripper plate to move downwards, so that the effect of protecting the inclined cutting edge of the female die is achieved.
Further, the support block in the punching die is a steel support block. The inner diameter of the annular plane on the upper end surface of the supporting block is 0.03mm larger than the outer diameter of the punch processing head, and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the through hole of the step of the female die.
Furthermore, the male die, the female die and the steel supporting block are all made of HSB CD2, the hardness is HRC58-62, and the inclination angle of the inclined edge of the female die is 25 +/-2 degrees; the inclined angle of the inclined edge of the male die is 15 degrees +/-2 degrees.
The invention has the beneficial effects that:
1. the invention summarizes a manufacturing method of a felt sealing ring for aviation through practice, firstly, a special punching die is utilized to process felt into an annular blank, a male die and a female die in the punching die both adopt oblique cutting edges, so that the punched section of the felt is straight, the deformation is small, and higher dimensional accuracy can be obtained. The regulator operates stably and reliably, and flight safety is guaranteed.
2. The processing device adopts the punching waste falling type steel supporting block to replace the conventional hard wood plate and other cushion materials. The steel supporting block and the male die of the inclined blade tubular structure have a fit clearance of 0.03mm, basically do not participate in cutting off in the blanking process, and mainly play a role in supporting materials, the 0.03mm clearance ensures that the moment borne by the blanking edge is small enough, so that the blanking section is ensured to be more straight, and the shape and size precision of parts is higher.
Drawings
FIG. 1 is a flow chart of a method for manufacturing an aerospace felt sealing ring according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a die according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a female mold in a die according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a male mold in the die according to the embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of the punch head of the die according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a matching structure of a female die, a male die and a supporting block in the die according to the embodiment of the invention; d1 is a radial clearance between the hole wall of the inner hole of the supporting block and the outer wall of the punch machining head, and d2 is a radial clearance between the outer wall of the upper end of the supporting block and the hole wall of the small end of the step through hole of the female die;
FIG. 7 is a schematic structural view of a baking jig according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a lift pin in the baking jig according to the embodiment of the present invention;
FIG. 9 is a schematic view of a felt sealing ring; d is the outer diameter of the felt sealing ring, and D is the inner diameter of the felt sealing ring;
the reference numbers in the figures are:
11-an upper template, 12-a fixing plate, 13-a female die, 131-a female die inclined cutting edge, 14-a stripper, 15-a male die, 150-a processing head, 151-a male die inclined cutting edge, 16-a lower template, 17-a supporting block, 18-a stripper plate and 19-a supporting column; 21-base, 22-lining, 23-felt sealing ring, 24-pressing plate, 25-core rod and 26-ejector rod.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, specific embodiments accompanied with figures are described in detail below, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making creative efforts based on the embodiments of the present invention, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in other embodiments" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the terms "upper, lower, inner and outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified and limited, the term "mounted" is to be understood in a broad sense, for example: can be a fixed connection, a detachable connection or an integrated connection. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the manufacturing method of the felt sealing ring 23 for aviation of this embodiment mainly includes the steps of blank making, baking, primary inspection, soaking, secondary inspection, and the like.
In this example, the die described in fig. 2 was used to cut a felt into a ring-shaped blank according to the drawing of the part. As can be seen from fig. 2, the die mainly comprises an upper die plate 11, a fixed plate 12, a female die 13, a stripper 14, a male die 15, a lower die plate 16, a supporting block 17, a stripper plate 18, a supporting column 19 and other conventional components; from the orientation shown in the figure, the fixing plate 12 is parallel to the horizontal plane and fixed on the upper template 11; the female die 13 is fixed on the fixing plate 12 by screws and is positioned right below the fixing plate 12. As can be seen from fig. 3, the center of the female die 13 of this embodiment is provided with a circular step through hole, the large end of the circular step through hole faces upward, and the small end faces downward; the end face of the small end is provided with an inclined blade of the female die 13, the inclined angle of the inclined blade can be 25 degrees +/-2 degrees, namely the included angle between the inclined blade and the central axis of the female die 13 can be 25 degrees +/-2 degrees. The inclined edge of the female die 13 can be understood as an annular boss coaxially arranged on the end surface of the small end, the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole, the radial section of the annular boss is a right-angled triangle, and the inclined edge corresponds to the outer peripheral surface of the annular boss. With reference to fig. 2 and 6, it can be seen that the piece withdrawing device 14 of the present embodiment is coaxially suspended in the circular step through hole of the female die 13, and moves up and down in the circular step through hole along the axial direction thereof by interacting with the supporting block 17 located below the piece withdrawing device, and it should be noted that the piece withdrawing device 14 is always kept in the circular step through hole of the female die 13 during the moving process. Move back a ware 14 and specifically can be for the cylinder of axial center trompil, axial cross-section for "T" style of calligraphy, including vertical spacing plate that moves back a pole and horizontal direction, move back the external diameter of a pole and the tip aperture looks adaptation of circular step through-hole, the external diameter of spacing plate and the main aspects aperture looks adaptation of circular step through-hole. The bottom of the back-off rod is used for interacting with the supporting block 17 and can move upwards under the action of the supporting block 17. As can be seen from fig. 2, 4 and 5, the male die 15 of the present embodiment includes a cylindrical processing head 150, the upper end of the processing head 150 is fixed on the fixing plate 12 by screws, and the lower end has a diameter matched with the bore diameter of the piece withdrawing device 14 and is inserted into the bore of the piece withdrawing device 14; as is evident from fig. 4 and 5, the lower end of the machining head 150 is recessed inwards by an angle of inclination of 15 ° ± 2 ° to form the beveled edge of the punch 15; the cross section of the concave part along the axial direction of the male die 15 is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the processing head 150; the inclined cutting edge 151 of the male die is flush with the inclined cutting edge 131 of the female die, and when the upper die plate 11 descends, the inclined cutting edge 151 of the male die is simultaneously contacted with the inclined cutting edge 131 of the female die to be punched to finish blanking. For felt material, the inclined cutting edge blanking has a straight section compared with the conventional blanking, the deformation is small, and higher dimensional accuracy can be obtained.
The supporting block 17 of this embodiment is made of steel, and is fixed on the lower die plate 16, and is coaxial with the female die 13 and the male die 15, and a through hole is formed in the axial center thereof, and the size of the hole diameter needs to ensure that it has a proper fit clearance with the male die 15 and the female die 13 in the radial direction. The specific structure can be seen in fig. 6, the axial center of the punch is provided with a through hole, the upper end surface of the punch is formed into an annular plane, the inner diameter of the annular plane is 0.02-0.04mm, preferably 0.03mm larger than the outer diameter of the processing head 150 of the punch 15, and the outer diameter of the annular plane is 0.02-0.04mm, preferably 0.03mm smaller than the aperture of the small end of the step through hole of the female die 13. The radial clearance between the hole wall of the inner hole of the supporting block 17 and the outer wall of the processing head 150 of the male die 15 is 0.03mm, and the radial clearance between the outer wall of the upper end of the supporting block 17 and the hole wall of the small end of the step through hole of the female die 13 is an economic design parameter, so that the requirement that the moment borne by a blanking edge is small enough and the blanking section is straight can be met; the die manufacturing cost is increased when the diameter is less than 0.03mm, and the moment applied to the blanking edge is large when the diameter is more than 0.03mm, so that the blanking section cannot be guaranteed to be straight, and the size precision of parts is influenced.
In the embodiment, the male die 15, the female die 13 and the steel supporting block 17 are all made of HSB CD2, and the hardness is HRC 58-62. The steel support blocks 17 do not substantially participate in the cutting during blanking and mainly serve to support the material. The stripper plate 18 is mounted on the support block 17 and is used to push the slug edge out of the annular plane of the support block 17.
The number of the support columns 19 is at least three, the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column 19 is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die, and the height of the supporting column 19 is 0.2 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die in the embodiment; during the operation of the mold, the supporting column 19 firstly contacts with the female mold 13 to push the stripper plate 18 to move downwards, so as to protect the inclined cutting edge 131 of the female mold.
When the felt is blanked by the punching die, a blank material is placed on the stripper plate 18 in an open die state, the die closing pedal is trampled, the die reaches a closed state to complete blanking, the stripper plate 18 in the upward process of the upper die withdraws processed waste edges from the supporting block 17 under the action of elasticity, the workpiece is withdrawn from the female die 13 by the workpiece withdrawing device 14 and falls onto the stripper plate 18, and the workpiece is taken out to complete one-time blanking. The punched core of inner hole waste material exits through the inner hole of the supporting block 17.
After obtaining a plurality of annular blanks, the baking jig shown in fig. 7 is used to remove the broken filaments protruding from the inner holes of the annular blanks and to shape them.
As can be seen from fig. 7, the roasting jig mainly includes a roasting chamber, a core rod 25, and a mandrel 26; the roasting chamber is used for fixing a plurality of annular blanks and comprises a base 21, a lining 22 and a pressing plate 24, wherein the inner diameter of the lining 22 is slightly larger than the outer diameter of the annular blanks, in the embodiment, the inner diameter of the lining 22 is equal to the outer diameter D +0.1 mm of the annular blanks, and the annular blanks can be ensured to be coaxially arranged in the lining 22 along the axial direction of the lining 22; one end of the bushing 22 is fixed on the base 21, and the other end is matched with the pressure plate 24; the base 21, the pressing plate 24 and the bush 22 are engaged at the engaging portion H8/H8. Through holes coaxial with the axial center line of the roasting chamber are formed in the base 21 and the pressing plate 24; the diameter of the through hole is matched with the diameter of the core rod 25, so that the core rod 25 can pass through the through hole. The core rod 25 is used for being matched with the roasting chamber to remove broken filaments protruding from the inner hole of the annular blank, the diameter of the core rod 25 is slightly smaller than the inner diameter of the annular blank, the diameter of the core rod 25 is equal to the inner diameter d-0.1 mm of the annular blank in the embodiment, the core rod is made of hot-work die steel H13, and the hardness of the core rod is HRC 46-50. The ejector rod 26 is used for pushing the workpiece into the roasting chamber before roasting and pushing the workpiece out of the roasting chamber after roasting. The ram 26 cooperates with the working portion of the bushing 22 at H9/H9.
The specific roasting process is as follows:
firstly, fixing a bush 22 on a base 21, then coaxially arranging a plurality of annular blanks in the bush 22 along the axial direction of the bush 22 by using a mandril 26, then fixing a pressing plate 24 at the other end of the bush 22, and axially pressing the annular blanks;
then, heating the core rod 25 in a Maver resistance furnace (8068) to 350-370 ℃, preserving heat for 7-10 minutes, taking out the core rod 25, inserting the core rod 25 into the roasting chamber through the through hole of the pressing plate 24, ensuring that the core rod 25 passes through the inner holes of the annular blanks, keeping for 3-5 seconds, burning out the filaments protruding from the inner holes of the annular blanks, fixing the shape, drawing out the core rod 25, taking out the processed workpiece to obtain a felt sealing ring 23, finishing roasting, and enabling the burnt part to be bright brown; the size of the baked felt sealing ring 23 is stable, no redundant broken filaments exist in an inner hole, the felt sealing ring is uniformly matched with the guide rod, and the flexibility of the guide rod is improved.
After roasting is finished, carrying out primary inspection, visually inspecting whether the inner hole of the felt sealing ring 23 has protruding broken filaments, and inspecting the size of the burnt felt sealing ring 23 by using a caliper so as to accord with a product design drawing;
and then soaking the felt sealing ring 23 meeting the requirement of the primary inspection in lubricating grease specified in a product design drawing. The method specifically comprises the following steps:
1) felt seals 23, which have been burned through the inner bore, are immersed in a well of grease, which has been stirred uniformly, and each of the felt seals is not allowed to overlap, so that the periphery of each felt seal 23 is impregnated with grease. The immersion time is 15 to 24 hours (room temperature).
2) Taking out the soaked felt sealing ring 23, and wrapping with parchment paper or kraft paper.
After the infiltration is completed, the product is inspected again:
1) cutting 5% of parts of a delivery batch to check the infiltration quality, soaking the felt sealing rings 23, and checking not less than 3 felt sealing rings 23 in each infiltration container (taking different positions).
2) After infiltration, the thickness of the felt sealing ring 23 is checked by 10 percent (removing surface floating oil) and a thickness measuring agent, a vernier caliper or an external micrometer, and the requirements of a design drawing are met.
Claims (12)
1. A manufacturing method of an aeronautical felt sealing ring is characterized by comprising the following steps:
step 1, preparing a blank;
blanking the felt into an annular blank by using a stamping die according to a part drawing;
the stamping die comprises an upper template (11), a fixing plate (12), a female die (13), a piece withdrawing device (14), a male die (15), a lower template (16), a supporting block (17), a discharging plate (18) and a supporting column (19);
the fixing plate (12) is fixed on the upper template (11);
the female die (13) is fixed on the fixing plate (12) and located right below the fixing plate (12), a circular step through hole is formed in the center of the female die (13), the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end surface of the female die (13) close to the small end of the circular step through hole is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die (13);
the male die (15) comprises a cylindrical processing head (150), the diameter of the processing head (150) is matched with the aperture of an inner hole of the part withdrawing device (14), one end of the processing head (150) is fixed on the fixing plate (12), and the other end of the processing head (150) is sleeved in the inner hole of the part withdrawing device (14); the end part of the working end of the machining head (150) is recessed inwards to form an inclined edge of the male die (15), the cross section of the recessed part along the axial direction of the male die (15) is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the machining head (150);
the inclined cutting edge (151) of the male die is flush with the inclined cutting edge (131) of the female die, and when the upper die plate (11) moves downwards, the inclined cutting edge (151) of the male die and the inclined cutting edge (131) of the female die simultaneously contact with a material to be punched to complete punching;
the supporting block (17) is fixedly arranged on the lower template (16), a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole in the female die (13), the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the processing head (150) of the male die (15), and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole in the female die (13); the supporting block (17) does not participate in shearing processing in the blanking process and only plays a role of supporting materials;
the discharging plate (18) is sleeved on the supporting block (17) and used for pushing the blanking waste edge out of the annular plane of the supporting block (17);
the number of the support columns (19) is at least three, the support columns are arranged on the stripper plate (18), the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column (19) is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; in the operation process of the die, the supporting column (19) firstly contacts with the female die (13) to push the stripper plate (18) to move downwards, so that the function of protecting the inclined cutting edge (131) of the female die is achieved;
step 2, roasting;
placing the annular blank prepared in the step 1 into a roasting fixture for roasting;
the roasting fixture comprises a roasting chamber and a core rod (25);
the roasting chamber is used for fixing a plurality of annular blanks prepared in the step 1 and comprises a base (21), a lining (22) and a pressing plate (24), and the hole diameter of an inner hole of the lining (22) is slightly larger than the outer diameter of the annular blanks so as to ensure that the annular blanks can be coaxially arranged in the lining (22) along the axial direction of the lining (22); one end of the bushing (22) is fixed on the base (21), and the other end of the bushing is matched with the pressure plate (24); through holes coaxial with the axial central line of the roasting chamber are formed in the base (21) and the pressing plate (24); the aperture of the through hole is matched with the diameter of the core rod (25) to ensure that the core rod (25) can pass through the through hole;
the core rod (25) is used for being matched with the roasting chamber to remove the broken filaments protruding from the inner hole of the annular blank, the diameter of the core rod (25) is slightly smaller than the inner diameter of the annular blank, and the core rod (25) can smoothly pass through the inner hole of the annular blank when penetrating into the roasting chamber;
the specific roasting process is as follows:
step 2.1, firstly fixing a lining (22) on a base (21), then coaxially arranging a plurality of annular blanks prepared in the step 1 in the lining (22) along the axial direction of the lining (22), then fixing a pressing plate (24) at the other end of the lining (22), and axially pressing the annular blanks;
2.2, heating the core rod (25) to 350-370 ℃, preserving heat for 7-10 minutes, taking out the core rod (25), inserting the core rod (25) into the roasting chamber through the through hole of the pressing plate (24), ensuring that the core rod (25) passes through the inner holes of the annular blanks, keeping for 3-5 seconds, burning out the filaments protruding from the inner holes of the annular blanks, fixing the shape, drawing out the core rod (25), taking out the processed workpiece to obtain a roasted felt sealing ring (23), wherein the burning part is bright brown;
step 3, checking;
visually checking that no protruding broken filaments exist in the inner hole of the roasted felt sealing ring (23), checking the size of the burnt felt sealing ring (23) by using a caliper, and entering the step 4 if the size accords with a product design drawing;
step 4, infiltration;
and soaking the roasted felt sealing ring (23) in lubricating grease specified by a product design drawing to obtain a target product.
2. The manufacturing method of the aeronautical felt sealing ring according to claim 1, characterized in that: in the step 2, the roasting fixture further comprises an ejector rod (26) which is used for pushing the annular blank into the roasting cavity before roasting, and pushing the roasted felt sealing ring (23) out of the roasting cavity after roasting; in the step 2.1, a lining (22) is firstly fixed on a base (21), and then a plurality of annular blanks prepared in the step 1 are coaxially arranged in the lining (22) along the axial direction of the lining (22) by utilizing an ejector rod (26); and 2.2, taking out the processed workpiece by using the ejector rod (26) to obtain the roasted felt sealing ring (23).
3. The manufacturing method of the aeronautical felt sealing ring according to claim 2, characterized in that: in the step 2, the matching parts of the base (21) and the pressure plate (24) of the roasting chamber and the lining (22) are matched in a way of H8/H8; the ejector rod (26) is matched with the working part of the bush (22) by H9/H9; in the step 2, the inner diameter of a lining (22) of the roasting cavity is 1mm larger than the outer diameter of the annular blank, and the diameter of a core rod (25) is 1mm smaller than the inner diameter of the annular blank; in the step 2, the core rod (25) in the roasting fixture is made of hot work die steel H13, and the hardness is HRC 46-50; in the step 1, the supporting block (17) in the punching die is a steel supporting block.
4. The manufacturing method of the aeronautical felt sealing ring according to claim 3, characterized in that: in the step 1, the male die (15), the female die (13) and the steel supporting block are all made of HSB CD2, and the hardness is HRC 58-62;
the inclined angle of the inclined edge of the female die (13) is 25 +/-2 degrees; the inclined angle of the inclined edge of the convex die (15) is 15 degrees +/-2 degrees.
5. The manufacturing method of the aeronautical felt sealing ring according to claim 4, characterized in that: in the step 1, the inner diameter of the annular plane on the upper end surface of the supporting block (17) is 0.03mm larger than the outer diameter of the processing head (150) of the convex die (15), and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the step through hole of the concave die (13).
6. A device for manufacturing a felt sealing ring for aviation is characterized by comprising a punching die and a roasting clamp; the punching die is used for processing the annular blank, and the roasting fixture is used for roasting the annular blank and removing broken filaments protruding from the inner hole of the annular blank;
the stamping die comprises an upper template (11), a fixing plate (12), a female die (13), a piece withdrawing device (14), a male die (15), a lower template (16), a supporting block (17), a discharging plate (18) and a supporting body (19);
the fixing plate (12) is fixed on the upper template (11);
the female die (13) is fixed on the fixing plate (12) and located right below the fixing plate (12), a circular step through hole is formed in the center of the female die (13), the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end surface of the female die (13) close to the small end of the circular step through hole is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die (13);
the male die (15) comprises a cylindrical processing head (150), the diameter of the processing head (150) is matched with the aperture of an inner hole of the part withdrawing device (14), one end of the processing head (150) is fixed on the fixing plate (12), and the other end of the processing head (150) is sleeved in the inner hole of the part withdrawing device (14); the end part of the working end of the machining head (150) is recessed inwards to form an inclined edge of the male die (15), the cross section of the recessed part along the axial direction of the male die (15) is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the machining head (150);
the inclined cutting edge (151) of the male die is flush with the inclined cutting edge (131) of the female die, and when the upper die plate (11) moves downwards, the inclined cutting edge (151) of the male die and the inclined cutting edge (131) of the female die simultaneously contact with a material to be punched to complete punching;
the supporting block (17) is fixedly arranged on the lower template (16), a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole in the female die (13), the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the processing head (150) of the male die (15), and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole in the female die (13); the supporting block (17) does not participate in shearing processing in the blanking process and only plays a role of supporting materials;
the discharging plate (18) is sleeved on the supporting block (17) and used for pushing the blanking waste edge out of the annular plane of the supporting block (17);
the number of the support columns (19) is at least three, the support columns are arranged on the stripper plate (18), the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column (19) is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; in the operation process of the die, the supporting column (19) firstly contacts with the female die (13) to push the stripper plate (18) to move downwards, so that the function of protecting the inclined cutting edge (131) of the female die is achieved;
the roasting fixture comprises a roasting chamber and a core rod (25);
the roasting chamber is used for fixing a plurality of annular blanks and comprises a base (21), a lining (22) and a pressing plate (24), and the hole diameter of an inner hole of the lining (22) is slightly larger than the outer diameter of the annular blanks so as to ensure that the annular blanks can be coaxially arranged in the lining (22) along the axial direction of the lining (22); one end of the bushing (22) is fixed on the base (21), and the other end of the bushing is matched with the pressure plate (24); through holes coaxial with the axial central line of the roasting chamber are formed in the base (21) and the pressing plate (24); the aperture of the through hole is matched with the diameter of the core rod (25) to ensure that the core rod (25) can pass through the through hole;
the core rod (25) is used for being matched with the roasting chamber to remove broken filaments protruding from the inner hole of the annular blank, the diameter of the core rod (25) is slightly smaller than the inner diameter of the annular blank, and the core rod (25) can smoothly penetrate through the inner hole of the annular blank when penetrating into the roasting chamber.
7. The apparatus of claim 6, wherein the apparatus further comprises: the roasting fixture also comprises an ejector rod (26) which is used for pushing the annular blank into the roasting chamber before roasting, and pushing the roasted felt sealing ring (23) out of the roasting chamber after roasting; the base (21) and the pressing plate (24) of the roasting chamber are matched with the matching part of the lining (22) by H8/H8; the ejector rod (26) is matched with the working part of the bush (22) by H9/H9; the inner diameter of a lining (22) of the roasting cavity is 1mm larger than the outer diameter of the annular blank, and the diameter of the core rod (25) is 1mm smaller than the inner diameter of the annular blank; the core rod (25) in the roasting fixture is made of hot die steel H13, and the hardness is HRC 46-50; the supporting block (17) in the punching die is a steel supporting block.
8. The apparatus of claim 7, wherein the apparatus further comprises: the male die (15), the female die (13) and the steel supporting block are all made of HSB CD2, and the hardness is HRC 58-62; the inclined angle of the inclined edge of the female die (13) is 25 +/-2 degrees; the inclined angle of the inclined edge of the convex die (15) is 15 degrees +/-2 degrees.
9. The apparatus of claim 8, wherein the apparatus further comprises: the inner diameter of the annular plane on the upper end surface of the supporting block (17) is 0.03mm larger than the outer diameter of the processing head (150) of the convex die (15), and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the step through hole of the concave die (13).
10. The utility model provides a die for processing aviation is with felt circle blank that obturages which characterized in that: comprises an upper template (11), a fixing plate (12), a female die (13), a piece withdrawing device (14), a male die (15), a lower template (16), a supporting block (17), a stripper plate (18) and a supporting column (19);
the fixing plate (12) is fixed on the upper template (11);
the female die (13) is fixed on the fixing plate (12) and located right below the fixing plate (12), a circular step through hole is formed in the center of the female die (13), the large end of the circular step through hole faces upwards, and the small end of the circular step through hole faces downwards; the end surface of the female die (13) close to the small end of the circular step through hole is provided with an annular boss with a right-angled triangle-shaped radial section, the bevel edge corresponds to the outer peripheral surface of the annular boss, and the inner diameter of the annular boss is equal to the aperture of the small end of the step through hole; the annular boss is coaxial with the circular step through hole and serves as an inclined blade of the female die (13);
the male die (15) comprises a cylindrical processing head (150), the diameter of the processing head (150) is matched with the aperture of an inner hole of the part withdrawing device (14), one end of the processing head (150) is fixed on the fixing plate (12), and the other end of the processing head (150) is sleeved in the inner hole of the part withdrawing device (14); the end part of the working end of the machining head (150) is recessed inwards to form an inclined edge of the male die (15), the cross section of the recessed part along the axial direction of the male die (15) is trapezoidal, and the length of the bottom edge of the trapezoid is equal to the diameter of the machining head (150);
the inclined cutting edge (151) of the male die is flush with the inclined cutting edge (131) of the female die, and when the upper die plate (11) moves downwards, the inclined cutting edge (151) of the male die and the inclined cutting edge (131) of the female die simultaneously contact with a material to be punched to complete punching;
the supporting block (17) is fixedly arranged on the lower template (16), a through hole is formed in the center of the supporting block, an annular plane of the upper end face is coaxial with and opposite to the circular step through hole in the female die (13), the inner diameter of the annular plane is 0.02-0.04mm larger than the outer diameter of the processing head (150) of the male die (15), and the outer diameter of the annular plane is 0.02-0.04mm smaller than the aperture of the small end of the step through hole in the female die (13); the supporting block (17) does not participate in shearing processing in the blanking process and only plays a role of supporting materials;
the discharging plate (18) is sleeved on the supporting block (17) and used for pushing the blanking waste edge out of the annular plane of the supporting block (17);
the number of the support columns (19) is at least three, the support columns are arranged on the stripper plate (18), the support columns are uniformly distributed along the same circumference, and the diameter of the circumference is larger than the side length of the felt to be blanked; the height of the supporting column (19) is 0.15-0.3 mm higher than the sum of the thickness of the felt to be blanked and the thickness of the annular boss of the female die; in the operation process of the die, the supporting column (19) is firstly contacted with the female die (13) to push the stripper plate (18) to move downwards, so that the function of protecting the inclined cutting edge (131) of the female die is achieved.
11. The die for machining an aerospace felt sealing ring blank of claim 10, wherein: the supporting block (17) in the punching die is a steel supporting block; the inner diameter of the annular plane on the upper end surface of the supporting block (17) is 0.03mm larger than the outer diameter of the processing head (150) of the convex die (15), and the outer diameter of the annular plane is 0.03mm smaller than the aperture of the small end of the step through hole of the concave die (13); the supporting column (19) in the punching die is cylindrical, and the height of the supporting column is 0.2 mm higher than the sum of the thickness of the felt to be punched and the thickness of the annular boss of the female die.
12. The die for machining an aerospace felt sealing ring blank of claim 13, wherein: the male die (15), the female die (13) and the steel supporting block are all made of HSB CD2, and the hardness is HRC 58-62; the inclined angle of the inclined edge of the female die (13) is 25 +/-2 degrees; the inclined angle of the inclined edge of the convex die (15) is 15 degrees +/-2 degrees.
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| KR101852742B1 (en) * | 2018-01-05 | 2018-04-27 | 김윤서 | To calibrate Shobashil's flange thickness and its device |
| CN213351604U (en) * | 2020-08-21 | 2021-06-04 | 广州达意隆包装机械股份有限公司 | Bottle blowing mold processing clamp |
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2021
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| CN114369939B (en) | 2023-04-04 |
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