Small-diameter guide pipe end corrugation machining device

Abstract

The utility model provides a small-diameter conduit end corrugation processing device which comprises a guide support, a clamping plate, a punch and a clamping piece, planes are symmetrically arranged on the side walls of the guide support and the clamping plate, and a corrugation forming groove and a conduit mounting groove are coaxially formed in the plane where the guide support is matched with the clamping plate; a guide through hole is formed in the front end of the guide support; the guide support and the guide pipe mounting groove in the clamping plate form a guide pipe mounting hole for wrapping the guide pipe; a corrugated forming hole and a blind hole are formed in one end of the punch along the axis; during machining, the guide pipe is installed in the guide pipe installation hole, the punch is inserted into the guide through hole of the guide support, the guide support and the clamping plate are clamped through the clamping piece after combination, the punch is axially knocked through a hammer, the guide pipe forms end corrugations under the action of extrusion force, operation is convenient and fast, forming is fast, the end corrugations are regularly formed, and the axis of the formed guide pipe does not deflect; and the device is particularly suitable for processing end corrugations of small-batch and small-diameter conduits.

Description

Technical Field

[0001] The utility model belongs to the technical field of catheter repair and manufacturing, and in particular relates to a small-diameter catheter end corrugation processing device. Background Art

[0002] Aircraft ducts are slender tubular structures made of LF2M aluminum alloy. The ends of the ducts are usually processed with end corrugations. During installation, a corrugated hose of the same specification is assembled with the aircraft duct and fastened with a clamp. The end corrugations of aircraft ducts are usually processed by rolling tools or duct end processing equipment. The tooling used in existing production is a mandrel, which is used to extend into the duct for support. The head of the mandrel is provided with a circle of raised corrugations, and a roller with a circle of grooves is provided at the corresponding position of the outer wall of the duct; during processing, after the processing equipment applies pressure, it rotates and rolls along the radial direction of the duct to form corrugations on the outer wall of the duct. For large-diameter ducts, the traditional processing method has a good effect. However, when processing the end corrugations of small-diameter ducts of 6mm-10mm, due to the small inner diameter of the duct, the diameter of the rolling tool or mandrel used is small, the strength of the mandrel is poor, and the pressure from the inner wall of the duct to the duct is insufficient, resulting in the height of the processed corrugated rolling waves failing to meet the index requirements, and the axis of the duct is prone to deflection after the corrugation is formed. In addition, because the mandrel is too thin, it often breaks during the processing, resulting in poor corrugation effect at the end of the aircraft duct and low processing efficiency. Utility Model Content

[0003] The utility model aims to solve the problems that the core shaft used in the existing processing of the corrugations at the end of a small-diameter catheter has a small diameter, resulting in poor forming corrugation effect and easy breakage of the core shaft during the processing, and provides a small-diameter catheter end corrugation processing device, which forms the end corrugations through a guide support and a clamping plate with guide holes under the stamping action of the punch, the guide support and the forming grooves on the clamping plate, and the end corrugations are formed regularly, the catheter axis does not deflect after forming, the processing quality and efficiency are high, it is not restricted by the site and equipment, and it is flexible and convenient to use.

[0004] To achieve the above purpose, the technical solution provided by the utility model is:

[0005] A small-diameter catheter end corrugation processing device, the catheter is a slender tubular structure, the end corrugation to be formed is arranged on the outer wall of the catheter, the end corrugation is an annular corrugation, and the special feature is that the processing device includes a guide support, a clamping plate, a punch and a clamping piece;

[0006] The punch is a columnar piece, one end of which is provided with a coaxially connected corrugated forming hole and a central blind hole along the axis. The shape and radial dimension of the corrugated forming hole are the same as those of the end corrugation to be formed, and the axial dimension is half of the length of the corrugation to be formed; the other end of the punch is used as the position for applying the axial impact force during processing;

[0007] The guide support comprises a cylindrical structure and a semi-cylindrical structure connected coaxially, a guide through hole matching the outer wall of the punch is provided in the middle of the cylindrical structure along the axis, and a gap exists between the end face of the punch and the bottom of the guide through hole after installation;

[0008] The symmetrical two side walls of the semi-cylindrical structure are respectively provided with an upper plane and a lower plane, and the middle of the upper plane is provided with a first corrugated forming groove and a first conduit installation groove coaxially connected along the axis;

[0009] The upper and lower surfaces of the clamping plate are planes, and the lower surface is provided with a coaxially connected second corrugated forming groove and a second conduit mounting groove along the axis;

[0010] The shape and radius of the first corrugation forming groove and the second corrugation forming groove are the same as those of the end corrugation to be formed, and the axial dimension is half of the length of the corrugation to be formed;

[0011] When the clamping plate is mounted on the upper surface of the semi-cylindrical structure of the guide support, the conduit is wrapped in the first conduit mounting groove and the second conduit mounting groove, and the end of the conduit is against the bottom of the central blind hole of the punch;

[0012] The clamping piece is used to clamp the assembled guide support and the clamping plate. After clamping, the lower surface of the guide support and the upper surface of the clamping plate are respectively fitted with the clamping part of the clamping piece.

[0013] Furthermore, the guide support is provided with a plurality of first pin holes, which are distributed on both sides of the first conduit installation slot;

[0014] The clamping plate is provided with a plurality of second pin holes which coincide with the axes of the first pin holes on the guide support and are used to install positioning pins, through which the guide support and the clamping plate are radially connected;

[0015] The two ends of the positioning pin do not extend out of the first pin hole and the second pin hole to prevent interference with the clamping portion of the clamping member.

[0016] Furthermore, a clamping platform is provided on the edge of the lower surface of the guide support, and the step surface of the clamping platform can fit with the upper surface of a clamping portion of the clamping member, so as to clamp and position the guide support on the clamping member.

[0017] Furthermore, a clamping platform is provided on the edge of the upper surface of the clamping plate, and the step surface of the clamping platform can fit with the upper surface of another clamping portion of the clamping piece, so as to clamp and position the clamping plate on the clamping piece.

[0018] Furthermore, the length of the guide through hole on the guide support is 30 mm to 50 mm.

[0019] Furthermore, a plurality of engraved lines are provided on the outer surface of the punch, and the zero engraved line is located at the end surface of the punch having the corrugated forming hole; the engraved lines are used to indicate the size of the gap between the end surface of the punch and the bottom of the central blind hole on the guide support during assembly.

[0020] Furthermore, during assembly, the size of the gap between the punch end face and the bottom of the central blind hole on the guide support is selected according to the corrugation rolling height of the end corrugation to be formed.

[0021] Furthermore, the length of the central blind hole of the punch is the minimum distance from the corrugation of the end to be formed to the end of the conduit.

[0022] Furthermore, the central blind hole of the punch and the conduit are matched with a small gap.

[0023] Furthermore, the clamping member is a vise.

[0024] The advantages of the utility model are:

[0025] 1. The processing device of the utility model has a simple structure, and includes a guide support, a clamp and a punch. According to the shape and size of the end corrugation to be formed, the guide support and the clamp are provided with corrugation forming grooves and catheter mounting grooves. A guide through hole is provided on the guide support for installing the punch; a corrugation forming hole and a center blind hole are coaxially provided on the punch. After installation, one end of the catheter is located in the center blind hole. The assembled guide support and clamp are radially clamped by a clamp, and an axial impact force is applied to the punch, so that the end corrugation can be squeezed on the outer wall of the catheter. The operation is simple and the corrugation forming is fast.

[0026] 2. When the utility model device is used for processing, the end of the punch is squeezed on the outer wall of the catheter to form the end corrugation, which will not cause defects such as scratches on the surface of the end corrugation. The end corrugation forming effect is good and the forming is regular, and the inner and outer surfaces of the catheter are not damaged.

[0027] 3. Compared with special catheter end rolling equipment and pressure forming equipment, the device of the utility model is convenient and quick to use and has low processing cost when manufacturing single-piece or small-batch catheter end corrugations.

[0028] 4. The utility model device is highly practical. The size of the corrugation forming hole on the punch and the size of the corrugation forming groove on the guide support and the clamping plate can be designed according to the size of the required end corrugation. It is particularly suitable for the processing of the end corrugation of a small diameter catheter of 6-10 mm, and has good consistency during mass production.

[0029] 5. The utility model has a simple structure and is not restricted by the site. It is particularly suitable for field maintenance.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 : It is a three-dimensional schematic diagram of the end corrugation processing device of the utility model;

[0033] Figure 2 :yes Figure 1 Schematic diagram of the three-dimensional structure of the middle guide support;

[0034] Figure 3 :yes Figure 1 A cross-sectional view of the middle guide support;

[0035] Figure 4 :yes Figure 1 Schematic diagram of the three-dimensional structure of the middle splint;

[0036] Figure 5 :yes Figure 4 Bottom view of the middle splint;

[0037] Figure 6 :yes Figure 1 Schematic diagram of the three-dimensional structure of the middle punch;

[0038] Figure 7 :yes Figure 6 Structural cross-sectional view of the punch;

[0039] Figure 8 : is a schematic diagram of the structure of the catheter to be processed;

[0040] Fig. 9 : It is a cross-sectional view of the assembly of the end corrugation processing device of the utility model and the conduit to be formed before forming;

[0041] Fig.10 : is a three-dimensional schematic diagram of disassembling the practical end corrugation processing device after molding.

[0042] Explanation of the reference numerals: 1-guide support, 101-guide through hole, 102-first corrugated forming groove, 103-first catheter mounting groove, 2-clamp, 201-second corrugated forming groove, 202-second catheter mounting groove, 3-punch, 301-corrugated forming hole, 302-center blind hole; 4-catheter, 401-end corrugation. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below. The embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0044] Reference Figure 1-Figure 8 , the diameter of the catheter is 6-8mm. In order to realize the processing of the end corrugation of a small diameter catheter with a diameter of 6-10mm, the utility model proposes a small diameter catheter end corrugation processing device, including a guide support 1, a clamping plate 2, a punch 3 and a clamping member. The side wall of the guide support 1 is symmetrically provided with planes, a guide through hole 101 and a first catheter mounting groove 103 are coaxially provided in the middle of a plane, and a first corrugated forming groove 102 is provided at the end connected to the guide through hole; the middle of the clamping plate 2 is coaxially provided with a second corrugated forming groove 201 and a second catheter mounting groove 202 connected, the upper and lower surfaces of the clamping plate are planes, and after the lower surface is fitted with the upper surface of the guide support, the first catheter mounting groove and the second mounting guide groove cooperate to form a guide hole that wraps the catheter 4; the first corrugated forming groove and the second corrugated forming groove have the same shape and radial dimensions as the end corrugation to be formed, and the axial dimension is equal to half of the end corrugation to be formed. One end of the punch 3 is provided with a connected corrugation forming hole 301 and a central blind hole 302 along the axis. The shape and radial size of the corrugation forming hole 301 are the same as the end corrugation to be formed, and the axial size is equal to half of the end corrugation to be formed.

[0045] The clamping piece is used to clamp the assembled guide support and the clamping plate. After clamping, the lower surface of the guide support and the upper surface of the clamping plate are respectively fitted with the clamping part of the clamping piece.

[0046] In this embodiment, the clamping member is a vise.

[0047] Reference Figure 2 and Figure 3 The guide support 1 includes a cylindrical structure and a semi-cylindrical structure connected coaxially. A guide through hole 101 is provided along the axis in the middle of the cylindrical structure to match the outer wall of the punch 3. Since the guide through hole 101 is too short, it will cause the punch to shake during processing. Therefore, in this embodiment, the length of the guide through hole is 30-50 mm. A first guide tube installation groove 103 is provided along the axis in the middle of the semi-cylindrical structure. A first corrugated forming groove 102 is provided at the connection between the first guide tube installation groove and the guide through hole. The axial dimension of the first corrugated forming groove is half of the length of the corrugation to be formed.

[0048] The symmetrical two side walls of the semi-cylindrical structure are provided with planes, the upper surface is used to fit with the lower surface of the clamping plate 2, and the lower surface is used to fit with the clamping surface of the vise when clamped on the vise. The lower edge of the guide support is provided with a clamping platform, and the step surface of the clamping platform can fit with the upper surface of the clamping part of the clamping member, which is used for clamping and positioning the guide support on the clamping member.

[0049] Furthermore, in order to prevent the catheter from being subjected to radial shear force of the clamp when clamping, two pin holes are vertically provided on the plane of the semi-cylindrical structure and are respectively located on both sides of the first catheter mounting groove 103, for radially connecting the positioning support 1 and the clamp 2 through positioning pins.

[0050] Reference Figure 4 and Figure 5 The clamping plate 2 is a block structure, and the bottom is a plane that fits with the upper surface of the guide support 1. The lower surface is provided with a second corrugated forming groove 201 and a second catheter mounting groove 202 coaxially connected to the corrugated forming groove. When the clamping plate is installed on the upper surface of the semicircular structure of the guide support 1, the first catheter mounting groove on the guide support 1 and the second catheter mounting groove on the clamping plate 2 cooperate to form a guide hole, and the catheter 4 can be wrapped in the guide hole; during processing, the guide hole is used to guide the working direction of the punch 3 to ensure that the thread on the end of the catheter is only subjected to axial impact force but not radial shear force during the forming process, thereby ensuring that the corrugated axis of the tube end after forming is not deflected, the catheter is evenly compressed, the corrugated forming is regular, and the roundness is high, ensuring that the end corrugation can be highly fitted with the inner surface of the hose during assembly.

[0051] The upper surface of the clamping plate 2 is provided with a plane, which is used to fit with the clamping surface of the vise when clamped on the vise. The upper edge of the clamping plate is provided with a clamping platform, and the step surface of the clamping platform can fit with the upper surface of another clamping part of the clamping piece, which is used for clamping and positioning the clamping plate on the clamping piece.

[0052] Furthermore, the clamping plate is provided with a pin hole that coincides with the axis of the pin hole of the guide support 1, and the pin holes are distributed on both sides of the second guide tube installation groove 202, and are used to radially fix the clamping plate 2 and the guide support 1 through the positioning pin. After installation, the positioning pin does not extend out of the pin hole to avoid interference with the clamping surface of the vise when installed on the vise.

[0053] Reference Figure 6 and Figure 7 The punch 3 is a columnar rod, with a central blind hole 302 opened along the axis in the middle of the punch, and a corrugated forming hole 301 coaxially arranged at the end of the blind hole, and the axial dimension of the corrugated forming hole 301 is half the length of the corrugation to be formed. The shape and radial dimensions of the corrugated forming hole are the same as the dimensions of the corrugation of the end to be formed. After assembly, one end of the catheter rod body is located in the central blind hole of the punch, with a small clearance fit, and the end face of the catheter is against the bottom of the central blind hole 302. The inner diameter of the central blind hole of the punch 3 is 0.05 mm larger than the outer diameter of the catheter to be processed, and the length of the central blind hole of the punch is the minimum distance from the end corrugation to be formed to the end of the catheter.

[0054] The outer wall of the punch 3 is provided with scale lines (not shown in the figure), and the end face with the corrugated forming hole is the scale line zero point, and 50 mm is engraved along the axial direction, which can intuitively show the gap size between the punch end face and the central blind hole on the guide support after the punch is inserted into the guide support when installed, ensuring the consistent forming when processing the end corrugation in small batches. The gap size is selected according to the corrugation rolling height of the end corrugation through industry processing standards.

[0055] Reference Figure 8 , is a schematic diagram of an aircraft duct structure. The duct 4 is a slender tubular structure, and the end corrugation 401 is an annular protrusion structure, and the end corrugation is located on the outer wall of the duct and close to one end of the duct. The sizes of different duct end corrugations are designed according to process requirements.

[0056] Reference Fig. 9 and Fig.10 When in use, first insert one end of the punch 3 provided with the corrugated forming hole 301 into the guide through hole 101 of the guide support 1. According to the forming requirements, there is a certain distance between the end face of the punch and the bottom of the guide hole; then insert one end of the conduit 4 to be processed into the punch along the first conduit mounting groove 103 on the guide support until the end of the conduit 4 is against the bottom of the blind hole of the punch; then place the clamp 2 on the upper surface of the guide support 1, and the second conduit mounting groove 202 on the clamp 2 and the first conduit mounting groove 103 on the guide support 1 wrap the conduit 4; radially fix the guide support 1 and the clamp 2 by two positioning pins; finally, place the assembled guide support 1 and the clamp 2 in the clamping position of the vise, so that the two clamping surfaces of the vise clamp the lower surface of the guide support 1 and the upper surface of the clamp 2.

[0057] After clamping, use a hammer to strike the other end face of the punch 3 axially until the end of the punch with the corrugated forming hole abuts against the step surface of the guide through hole 101 of the guide support, and the catheter automatically expands under the action of the extrusion force to form the required end corrugation.

[0058] The above description is only a specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present utility model, and these modifications or substitutions should be included in the protection scope of the present utility model.

Claims

1. A small diameter catheter end corrugation processing device, the catheter is a slender tubular structure, the end corrugation to be formed is arranged on the outer wall of the catheter, the end corrugation is an annular corrugation, characterized in that: The processing device comprises a guide support, a clamping plate, a punch and a clamping member; The punch is a columnar piece, one end of which is provided with a coaxially connected corrugated forming hole and a central blind hole along the axis. The shape and radial dimension of the corrugated forming hole are the same as those of the end corrugation to be formed, and the axial dimension is half of the length of the corrugation to be formed; the other end of the punch is used as the position for applying the axial impact force during processing; The guide support comprises a cylindrical structure and a semi-cylindrical structure connected coaxially, a guide through hole matching the outer wall of the punch is provided in the middle of the cylindrical structure along the axis, and a gap exists between the end face of the punch and the bottom of the guide through hole after installation; The symmetrical two side walls of the semi-cylindrical structure are respectively provided with an upper plane and a lower plane, and the middle of the upper plane is provided with a first corrugated forming groove and a first conduit installation groove coaxially connected along the axis; The upper and lower surfaces of the clamping plate are planes, and the lower surface is provided with a coaxially connected second corrugated forming groove and a second conduit mounting groove along the axis; The shape and radius of the first corrugation forming groove and the second corrugation forming groove are the same as those of the end corrugation to be formed, and the axial dimension is half of the length of the corrugation to be formed; When the clamping plate is mounted on the upper surface of the semi-cylindrical structure of the guide support, the conduit is wrapped in the first conduit mounting groove and the second conduit mounting groove, and the end of the conduit is against the bottom of the central blind hole of the punch; The clamping piece is used to clamp the assembled guide support and the clamping plate. After clamping, the lower surface of the guide support and the upper surface of the clamping plate are respectively fitted with the clamping part of the clamping piece.

2. The small diameter catheter end corrugation processing device according to claim 1 is characterized in that: The guide support is provided with a plurality of first pin holes, which are distributed on both sides of the first conduit installation groove; The clamping plate is provided with a plurality of second pin holes which coincide with the axes of the first pin holes on the guide support and are used to install positioning pins, through which the guide support and the clamping plate are radially connected; The two ends of the positioning pin do not extend out of the first pin hole and the second pin hole to prevent interference with the clamping portion of the clamping member.

3. The small diameter catheter end corrugation processing device according to claim 2, characterized in that: A clamping platform is provided on the edge of the lower surface of the guide support, and the step surface of the clamping platform can be fitted with the upper surface of a clamping portion of the clamping piece, so as to clamp and position the guide support on the clamping piece.

4. The small diameter catheter end corrugation processing device according to claim 3, characterized in that: A clamping platform is provided on the edge of the upper surface of the clamping plate, and the step surface of the clamping platform can be fitted with the upper surface of another clamping part of the clamping piece, so as to clamp and position the clamping plate on the clamping piece.

5. The small diameter catheter end corrugation processing device according to claim 4, characterized in that: The length of the guide through hole on the guide support is 30 mm to 50 mm.

6. The small diameter catheter tip corrugation processing device according to claim 5, characterized in that: A plurality of engraved lines are arranged on the outer surface of the punch, and the zero engraved line is located at the end surface of the punch having one end of the corrugated forming hole; the engraved lines are used to show the size of the gap between the end surface of the punch and the bottom of the central blind hole on the guide support during assembly.

7. The small diameter catheter end corrugation processing device according to claim 6, characterized in that: During assembly, the size of the gap between the punch end face and the bottom of the central blind hole on the guide support is selected according to the corrugation rolling height of the end corrugation to be formed.

8. The small diameter catheter end corrugation processing device according to claim 7, characterized in that: The length of the central blind hole of the punch is the minimum distance from the corrugation of the end to be formed to the end of the conduit.

9. The small diameter catheter tip corrugation processing device according to claim 8, characterized in that: The central blind hole of the punch and the conduit are matched with a small gap.

10. The small diameter catheter end corrugation processing device according to any one of claims 1 to 9, characterized in that: The clamping member is a vise.

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