JP2010044970A - Method for manufacturing sheath member - Google Patents

Abstract

An object of the present invention is to provide a method for manufacturing a sheath member that makes it possible to easily and efficiently expose a core wire to a certain length at the end of the sheath member and to prevent deformation of the exposed core wire.
[Solution]
Cuts 41 are made on the outer peripheral surface of the metal tube 11 at a fixed position in the axis G direction from the end surface 12 of the metal tube 11 constituting the sheath member material 1 so that the tube wall is cut in the circumferential direction. A portion closer to the end from the cut 41 toward the end surface 12 of the metal tube 11 is defined as a portion 15 to be cut. The excision target site 15 is sandwiched in the radial direction between the cradle 201 and the horn 303 of the ultrasonic vibrator 301 so that the filler 21 and the core wire 31 inside the excision target site 15 are separated. Apply ultrasonic vibration. After the separation, the excision target site 15 is moved away in the direction in which the cut 41 expands. As a result, a sheath member with the core wire exposed at the end is obtained.
[Selection] Figure 4

Description

  The present invention relates to a method for manufacturing a sheath member (MI cable), and more particularly, to a method for manufacturing a sheath member used for a thermistor temperature sensor or the like.

  This type of sheath member (MI cable) is formed of a metal tube (sheath tube) forming a surface layer portion and a core wire (for example, stainless steel wire) passed through an insulating material filled therein. In general, the core wire is protruded (exposed) by a certain length at both ends of the metal tube. For example, in a sheath member used for a thermistor temperature sensor, a temperature sensing element (sensor element) is connected to the end of two core wires protruding from one end of the metal tube located on the tip side of the sensor. A lead wire for external extraction is connected to the end of each core wire that is connected via a wire and protrudes to the other end side via a relay terminal (see Patent Documents 1, 2, and 3). FIG. 9 is a perspective view for explaining the sheath member 10 before the temperature sensing element and the relay terminal are connected. The metal tube 11 constituting the sheath member 10 is filled with an insulating filler 21, and the electrical wires between the core wires 31 passed through the inside of the metal tube 11 and between them and the metal tube 11 are electrically connected. Insulation is maintained.

  Conventionally, the sheath member 10 with the core wire 31 protruding at each end in this manner, that is, in the above-described one, the sheath member before the temperature sensing element and the lead wire are connected is filled in the metal tube 11. A material for a sheath member (one part) as shown in FIG. 10 cut from a base material that is filled with the material 21 and passed through the core wire 31 and is formed into a long and narrow shape into a single article (one part). The material for the sheath member 1) was manufactured through the following steps. First, at each end portion of the metal tube 11 constituting the single sheath member material 1, as shown in FIG. 11, the outer peripheral surface (surface layer portion) is formed from the end surface 12 over a certain range in the direction of the axis G. The metal tube 11 is cut (turned) over a certain range by, for example, a lathe, and the end of the metal tube 11 is cut (cut off). Next, the filler 21 exposed by cutting off the end of the metal tube 11 is removed. By doing so, the core wire 31 is exposed to a predetermined length at the end as in the sheath member 10 shown in FIG.

On the other hand, such a filler 21 is formed by compressing and hardening an insulating material powder (powder) such as silica or magnesia. For this reason, although it is exposed, such a filler 21 cannot be removed simply by blowing air. Therefore, conventionally, after the filler 21 exposed after cutting of the metal tube 11 is crushed or cut with a blade, the filler (residual powder) adhering to and remaining around the core wire is subjected to, for example, sandblasting. The method of removing by this was taken.
JP 2000-266609 A JP 2000-162051 A JP 2000-171308 A

  When the sheath member 10 is manufactured by processing and processing the sheath member material 1 as described above to expose the core wire 31 at the end, there are the following problems to be solved. First, in order to cut off the end portion of the metal tube 11 constituting the sheath member by turning, as described above, cutting is performed over a certain range in the axial direction from the end surface 12, that is, the length of the exposed core wire 31. It is necessary to relatively laterally feed the tool (send it in the axial direction) to scrape the entire tube wall (thickness) of the portion near the end of the metal tube 11. Accordingly, in the turning (cutting) process, it is necessary to take a considerable machining time in response to the fact that the cutting tool (bite) 101 needs to be laterally fed by the length of the core wire 31 to be exposed. Become.

  Secondly, after the turning process, the exposed filler 21 is crushed or cut with a blade and then sandblasted, which requires many processes and processing time. Moreover, in order to remove the filler 21 as described above, the metal wall 11 is surely excised (scraped) so that the tube wall of the target site (the site to be excised) to be excised does not remain. )There is a need. Further, in the turning of the metal tube 11 as described above, the cutting edge of the cutting tool 101 is cut to the portion of the filler 21 existing inside the inner peripheral surface (the inner wall surface of the tube) of the metal tube 11, and the cutting is performed. It is necessary to cut the target part in the axial direction. For this reason, in this turning process, the wear and damage of the cutting edge is accelerated, leading to a decrease in tool life and an increase in processing cost. In addition, the exposed core wire is about 0.5 mm, and depending on the sheath member, it is a finer metal wire. Therefore, due to an error in the process of crushing the filler 21 and the impact in the blasting process, It may cause deformation such as bending.

  The present invention has been made in view of the problems in the manufacturing process of the sheath member as described above, and it is simple and easy to expose the core wire at a certain length along the axial direction at the end of the sheath member. It is an object of the present invention to provide a method for manufacturing a sheath member that can be efficiently performed and that hardly deforms an exposed core wire.

In order to achieve the above object, the invention according to claim 1 is a material for a sheath member in which a core wire is passed through a metal tube and is filled with an insulating filler, and the sheath member material is formed. In a method of manufacturing a sheath member in which the core wire is exposed at a certain length at the end by removing a portion of the metal tube close to the end in a certain range in the axial direction from the end surface and the filler inside thereof. ,
Of the outer peripheral surface of the metal tube constituting the material for the sheath member, at a certain position in the axial direction from the end surface of the metal tube, a cut is made so that the tube wall of the metal tube is cut in the circumferential direction,
From this incision, the part closer to the end toward the end face of the metal tube is the part to be excised,
The part to be excised in the metal tube is sandwiched between the cradle and the horn of the ultrasonic vibrator in the radial direction,
Under the sandwiched state, ultrasonic vibration is applied to the excision target site so that the filler and the core wire existing inside the excision target site in the metal tube are separated,
After separation of the filler and the core wire, the portion to be excised in the metal tube is moved away in the direction in which the notch expands, thereby removing the portion to be excised in the metal tube and the filler in the inside thereof. It is characterized by removing.

  The invention according to claim 2 is characterized in that when ultrasonic vibration is applied to the excision target part, a part that is not the excision target part in the metal tube is fixed. This is a manufacturing method of the sheath member.

The invention according to claim 3 is a sheath member material in which a core wire is passed through a metal tube and is filled with an insulating filler, and the end face of the metal tube constituting the sheath member material In the method of manufacturing a sheath member in which the core wire is exposed for a certain length at the end by removing the portion near the end in a certain range in the axial direction from the inner filler.
Of the outer peripheral surface of the metal tube constituting the material for the sheath member, at a certain position in the axial direction from the end surface of the metal tube, a cut is made so that the tube wall of the metal tube is cut in the circumferential direction,
From this incision, the part closer to the end toward the end face of the metal tube is the part to be excised,
Fixing the part not to be excised in the metal tube,
While sandwiching this part to be excised in the metal tube in the radial direction between the cradle and the horn of the ultrasonic vibrator,
In this clamping, the axis of the horn is inclined with respect to the axis of the part to be excised so that the part to be excised has a component force in a direction separating from the part that is not the part to be excised. Leave
Under the sandwiched state, while applying ultrasonic vibration to the excision target site so that the filler and the core wire existing inside the excision target site in the metal tube are separated,
Even after separation of the filler and the core wire, ultrasonic vibration is applied, and the ultrasonic material is used to move the filler on the inside of the metal tube together with the portion to be excised so that the cut is expanded. It is characterized by.

  In the manufacturing method according to the first aspect of the present invention, the portion near the end of the metal tube, which is the part to be excised, is not cut in the axial direction as in the prior art, but is cut in the radial direction at a fixed position (for example, by turning) Therefore, machining of metal pipes (cutting) can be performed more easily than before. In addition, after the cutting, ultrasonic vibration is applied to separate the filler and the core wire existing inside the excision target portion in the metal tube, and the filling is performed simultaneously by the lateral vibration due to the application of the ultrasonic vibration. The material is cut in such a way that it is divided in the axial direction at the incision point. Therefore, after separating the filler and the core wire by applying ultrasonic vibration, the excision target portion in the metal tube is removed (moved out) by moving the excision target site in the metal tube in a direction in which the incision expands. Together with the part, the filler inside the part can be easily removed. Thus, according to the present invention, it is possible to obtain a sheath member in which the core wire is exposed for a predetermined length at the end.

  Thus, according to the manufacturing method of this invention, the cutting process of a metal pipe can be fewer than before. In addition, a sheath member in which the core wire is exposed at the end can be obtained without requiring a step of crushing the filler or cutting with a blade as in the prior art, or a sandblasting step. For this reason, the manufacture is simplified and the efficiency is improved, and the exposed core wire is not deformed.

  In the case of turning, the metal tube can be cut easily by vertically feeding a parting tool or a grooving tool, or may be cut with a grindstone instead of the tool. Further, it may be cut or ground in the circumferential direction without rotating the metal tube.

  In the present invention, the filler and the core wire are separated from each other by the application of ultrasonic vibration, both of which are separated by a minute gap or are in a relaxed state. However, in addition to this, the filler and the core wire are in contact with each other without a gap at the interface, but it is also included that the mutual pressure contact state is eliminated.

  In the manufacturing method according to the first aspect of the present invention, as described in the second aspect, when the ultrasonic vibration is applied to the excision target part, the part that is not the excision target part in the metal tube is fixed. If it puts, the material for sheath members will become stable. For this reason, an ultrasonic vibration can be stably provided to the excision target site.

  In the first and second aspects of the present invention, after separating the filler and the core wire inside the metal tube at the site of excision by applying ultrasonic vibration, the metal tube at the site of excision is separately provided. It is necessary to relatively remove (extract) along the axial direction. On the other hand, according to the third aspect of the present invention, in the process of applying ultrasonic vibration, the component force in the direction of separating from the portion that is not the excision target site (from the incision of the excision target site) to the excision target site. The component force to push away is given. And also in this case, when ultrasonic vibration is applied to separate the filler and the core wire existing inside the excision target site in the metal tube, the reason similar to the above is given by the application of the ultrasonic vibration At the same time, the filler is divided in the axial direction at the cut portion. Therefore, according to this invention of Claim 3, after isolate | separating a filler and a core wire by provision of an ultrasonic vibration, with the provision of the ultrasonic vibration provided, together with the part to be excised in the metal tube The filler on the inner side is moved in the direction in which the cut is expanded. And, by this movement, the excision target site is automatically extracted or moved so as to be pushed out (externally), so it may or may not require a step of removing the excision target site separately. This simplifies the process.

  The best mode for producing the present invention (first embodiment) will be described in detail with reference to FIGS. The sheath member manufactured by this manufacturing method is used for the thermistor temperature sensor, and one sheath member material used is the same as that shown in FIG. FIG. 1 is a partially broken enlarged view for explanation of a portion near one end of the sheath member material 1. Hereinafter, description will be given with reference to this part closer to one end.

  The sheath member material 1 is formed of a metal tube 11 forming a surface layer portion, an insulating filler 21 filled therein, and two core wires 31 passed through the filler 21. Yes. The metal tube 11 constituting the sheath member material 1 is a thin stainless steel tube (outer diameter 2.5 mm, wall thickness 0.3 mm). The filler 21 is compressed with silica powder as a main component, and the two core wires 31 drawn through the filler 21 along the axis G of the metal tube 11 have a diameter of 0, for example. .5 mm stainless steel metal wires, all of which are aligned at the end face 12 of the metal tube 11. The sheath member material 1 is formed by cutting a long predetermined MI cable into a predetermined length (the length of one sheath member).

  For such a sheath member material 1, a position P <b> 1 of a constant dimension L <b> 1 (5 to 10 mm in this example) from the end surface 12 in the axis G direction at each end portion of the outer peripheral surface of the metal tube 11. Then, as shown in FIG. 1, the tool 101 is cut so as to be pressed. Then, as shown in FIG. 2, cuts (grooves) 41 are made so that the tube wall of the metal tube 11 is cut in the circumferential direction. After the cut 41 is made in this way, the portion of the dimension L1, that is, a portion closer to the end from the cut 41 toward the end face 12 of the metal tube 11 becomes the cut target portion 15. Note that a cutter or a grindstone (circular grindstone) or a parting tool or a grooving tool (hereinafter also simply referred to as a tool) may be used as a tool for inserting the cut 41.

  In addition, when making the cut 41, as shown in FIGS. 1 and 2, the length of the core wire 31 to be exposed at the end (exposed length) is L1, as shown in FIGS. The cutting edge) 101 may be cut in consideration of the thickness. Further, the depth (feed amount in the radial direction) of the notch 41 is set to be larger than the thickness of the tube wall so that the tube wall of the metal tube 11 is surely cut. Note that the width of the cuts (grooves) 41 may be set as appropriate, but is preferably as narrow as possible, as will be described later. Further, in the case where such a cut 41 is made by lathe processing, a portion to be excised 15 at one end portion of the sheath member material 1 is chucked, and the other end portion is supported by steadying, so that each end portion is supported. It may be performed by simultaneously grooving the position P1 on the part side. In this way, the sheath member material 1 in which the cuts 41 are made in the outer peripheral surface of the metal tube 11 at the position P1 is hereinafter also referred to as a sheath member work product 2 (see FIG. 3).

  Next, as shown in FIGS. 4 and 5, the portion 15 to be excised in the metal tube 11 of the sheath member work-in-process 2 is, in its radial direction, the cradle 201 and the horn of the ultrasonic vibrator 301. 303 is clamped with a predetermined clamping pressure. At this time, in this embodiment, the axis G2 of the horn 303 is set so as to intersect with the axis G of the metal tube 11 at a right angle or a substantially right angle. The material receiving surface (seat surface) 203 in the cradle 201 may be a flat surface, but as shown by a two-dot chain line in FIG. 5, it is in line contact with the bus bar of the metal tube 11 forming the sheath member work-in-process 2. Such a cylindrical curved surface may be used.

  Then, under such a sandwiched state, ultrasonic vibration is applied from the tip 305 of the horn 303 to the excision target site 15. The application of the ultrasonic vibration may be performed by setting conditions for applying the ultrasonic vibration so that the filler 21 and the core wire 31 existing inside the excision target portion 15 in the metal tube 11 are separated. This is due to various conditions such as the material, tube diameter and thickness of the metal tube 11 forming the sheath member material 1, the material of the internal filler 21, the degree of compression, and the outer diameter of the tip 305 of the horn 303. Depending on the material for the sheath member, the optimum condition for separating the two naturally depends on the sheath member material, and it is sufficient to set the vibration so as to separate the filling material 21 and the core wire 31 from each other. That is, what is necessary is just to set according to the raw material for sheath members to such an extent that the filler 21 and the core wire 31 isolate | separate at the interface of both.

  By the way, in the manufacturing method of this example, the clamping pressure (static pressure) when clamping between the cradle 201 and the horn 303 of the ultrasonic vibrator 301 is set in the range of 1 g to 3000 g, and the amplitude is 5 to 13 μm at 60 kHz. The separation was obtained by applying a sound wave (vibration) for 0.5 to 5 seconds. In addition, while applying the ultrasonic vibration to the excision target site 15, if the site 17 that is not the excision target site 15 in the metal tube 11 is fixed by the fixing means 321 shown in FIG. Vibration can be stably applied.

  When ultrasonic vibration is applied to the excision target site 15 in this manner, the inner filler 21 and the core wire 31 are separated from each other in a form in which a minute gap is generated at the interface. As described above, when the ultrasonic vibration is applied in this way and the filler 21 and the core wire 31 existing inside the excision target portion 15 in the metal tube 11 are separated, the ultrasonic vibration is applied. At the same time, the filler 21 is cut in the form of being divided in the direction of the axis G at 41 cuts. It is considered that this is because the sheath member material 1 itself is thin and is easily cut by the notch effect due to the cuts 41 and the force applied from the lateral direction to the material 1 by ultrasonic vibration. In this sense, the incision 41 is set deeper and the groove width of the incision 41 is set narrower so as to approach the axis G formed of the outer peripheral surface of the filler 21 within a range in which the core wire 31 is not damaged. Is preferred.

  After applying the ultrasonic vibration to the excision target site 15 as described above, the pinching by the cradle 201 and the horn 303 is released. Then, the excision target site 15 in the metal tube 11 is removed by moving along the axis G in a direction in which the width of the cut 41 (width in the axial direction) increases (see FIG. 6). At this time, as described above, the filling material 21 and the core wire 31 inside the excision target region 15 are separated, and the filling material 21 is divided in the direction of the axis G at 41 cuts. The metal tube 11 portion of the portion 15 and the filler 21 inside thereof can be easily removed together. As a result, as shown in FIG. 6, the sheath member 10 in which the core wire 31 is exposed at a certain length (L1) at the end portion can be obtained efficiently.

  As described above, according to the present manufacturing method, the processing (cutting) of the metal tube 11 is not performed by cutting the portion near the end of the metal tube 11 that is the portion 15 to be cut in the direction of the axis G as in the prior art. Since it is only necessary to cut in the radial direction at the predetermined position P1, it can be performed much more easily than before. In addition, after the cutting, ultrasonic vibration is applied to separate the filler 21 and the core wire 31 existing inside the portion 15 to be cut in the metal tube 11, and then the portion near the end of the metal tube 11 is moved. Can be easily removed. In addition, when the filler 21 and the core wire 31 existing inside the excision target site 15 are separated by applying ultrasonic vibration, the filler 21 does not adhere to the core wire 31. For example, the sheath member 10 can be obtained very efficiently because it can be easily removed by blowing air.

  Furthermore, according to this manufacturing method, it is desired that the core wire 31 is exposed at a predetermined length at the end portion without requiring a step of crushing the filler 21 or cutting it with a blade or a sandblasting step as in the prior art. The sheath member 10 can be obtained. For this reason, simplification and efficiency improvement of the manufacture are remarkably achieved. In addition, it is possible to obtain a remarkable effect that the core wire 31 can be prevented from being deformed such as bending. Note that the same processing and processing as described above may be performed on the opposite end of the metal tube 11 as well.

  Next, another embodiment of the manufacturing method will be described with reference to FIGS. 7 and 8, which should be said to be an improvement of the manufacturing method of the above-described embodiment. However, it is exactly the same as the above-described manufacturing method until the notch 41 is made on the outer peripheral surface of the metal tube 11 constituting the sheath member material 1 so that the tube wall is cut in the circumferential direction (see FIGS. 1 to 3). ). The only difference is the form of application of ultrasonic vibration to the excision target site 15, which is a site closer to the end surface 12 of the metal tube 11 after the cut 41 is made. That is, the only difference is that in the manufacturing method of the present embodiment, the axis G2 of the horn 303 of the ultrasonic vibrator 301 is inclined with respect to the perpendicular S with respect to the axis G of the site 15 to be excised. is there. Therefore, the description about the same content is abbreviate | omitted and only the difference is demonstrated below. 7 is different from FIG. 4 only in that the axis G2 of the horn 303 is inclined. Therefore, in FIG. 7 as well, the same parts are designated by the same reference numerals, and the description thereof is appropriately given. Omitted.

  That is, also in this embodiment, the portion 15 to be excised in the metal tube 11 is sandwiched between the cradle 201 and the horn 303 of the ultrasonic vibrator 301 in the radial direction. In this clamping, FIG. As shown in FIG. 5, the axial line of the horn 303 is applied so that a component force (force in the direction of arrow C in FIGS. 7 and 8) is applied to the excision target region 15 in a direction separating from the non-excision target region 17. G2 is not perpendicular to the axis G of the excision site 15 but is inclined with respect to the coaxial line G. In this embodiment, the axis G2 of the horn 303 has an inclination angle θ with respect to the perpendicular S to the axis G of the excision target site 15. Note that the force in the direction of the arrow C can be increased as the tilt angle θ increases, but an angle between 0.2 degrees and 10.0 degrees is sufficient because of the application of ultrasonic vibration.

  Then, under the sandwiched state, ultrasonic vibration is applied to the excision target site 15 so that the filler 21 and the core wire 31 existing inside the excision target site 15 in the metal tube 11 are separated. The conditions for applying the vibration may be set in accordance with the sheath member material 1 in the same manner as in the above embodiment. Thus, when ultrasonic vibration is applied to the excision target site 15 in this way, the filler 21 and the core wire 31 on the inner side thereof have a shape in which a minute gap is generated at the interface, as described above. Separate as in the previous embodiment. At the same time, due to the vibration, the inner filling material 21 is divided between the part 15 to be excised and the part that is not the part 15 at the part where the cut 41 is made.

  However, in this manufacturing method, even after the filler 21 and the core wire 31 are thus separated, the ultrasonic vibration is continuously applied for a predetermined time. Then, a force in a direction (in the direction of arrow C in FIG. 7) that separates from the part 17 that is not the resection target part 15 is given to the resection target part 15 as its vibration. For this reason, by the continuous application of the vibration, the filling material 21 inside thereof along with the portion 15 to be excised in the metal tube 11 is expanded in the direction in which the cut 41 expands, that is, in the direction away from the cut 41 (the left side in FIG. 7). It moves along the axis G of the metal tube 11. Finally, as shown in FIG. 8, the excision target site 15 is separated and dropped from the end of the sheath member 10. Thus, after the excision target site 15 moves and falls off, the application of ultrasonic vibration is stopped and the horn 303 is released. In addition, a sheath member in which a predetermined amount of the core wire is exposed at both ends can be obtained on the other end side in the same manner.

  Thus, in this manufacturing method, after separating the filler 21 and the core wire 31 inside the metal tube 11 of the excision target site 15 by applying ultrasonic vibration, the metal of the excision target site 15 is separately provided. There is no need to relatively remove (remove) the tube 11 along the axis G direction. That is, according to this manufacturing method, by continuously applying the ultrasonic vibration, the excision target site 15 is automatically removed by the ultrasonic vibration, so that the sheath member can be obtained more efficiently. In addition, in order to accelerate the automatic removal of the excision target part 15 at this time by gravity, the axis G itself of the excision target part 15 is set so that the outer end (free end) of the excision target part 15 is appropriately downward. May be sandwiched between the cradle 201 and the horn 303 so as to have an inclination angle with respect to the ground.

  The production method of the present invention is not limited to the above examples, and can be modified and embodied as appropriate. The ultrasonic vibration condition to be applied may be set according to the sheath member material as described above. The sheath member (MI cable) is not limited to the one for the thermistor temperature sensor, and can be applied to those used for various applications. Therefore, it goes without saying that the present invention can be applied to a sheath member having one core wire or three or more sheath members.

The partially broken enlarged view for description of the site | part near one end of the raw material for sheath members used for the manufacturing method of 1st Embodiment of this invention. FIG. 2 is a view after cutting at a predetermined position in a portion near one end of the sheath member material in FIG. 1. The perspective view of the sheath member work-in-process after making a notch | incision in the part near one end, and the principal part enlarged view. Explanatory drawing of the process of providing an ultrasonic vibration to the excision object site | part of a sheath member work-in-process. Explanatory drawing which looked at the principal part in FIG. 4 from the left side of the same figure. The perspective view for description when removing the excision object part, and its principal part enlarged view. Explanatory drawing of the process of providing an ultrasonic vibration to the excision object site | part of a sheath member work in progress explaining another form. FIG. 8 is an explanatory diagram of a state in which the excision target site is separated and dropped out in FIG. 7. The perspective view for description of a sheath member. The perspective view for description of the raw material for sheath members. The perspective view for description explaining the conventional manufacturing method of a sheath member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheath member material 10 Sheath member 11 Metal pipe 12 End face 15 of metal pipe Resection object part 17 Part not metallization object part 21 Filling material 31 Core wire 41 Cut 201 Receiving base 301 Ultrasonic vibrator 303 Horn P1 Metal pipe A certain position G in the axial direction from the end face Axis of metal tube
G2 Horn axis θ Inclination angle

Claims (3)

A sheath member material in which a core wire is passed through a metal tube and is filled with an insulating filler, and of the metal tube forming the sheath member material, the end of a certain range in the axial direction from its end surface In the method of manufacturing a sheath member in which the core wire is exposed for a certain length at the end by removing the portion and the filler inside thereof,
Of the outer peripheral surface of the metal tube constituting the material for the sheath member, at a certain position in the axial direction from the end surface of the metal tube, a cut is made so that the tube wall of the metal tube is cut in the circumferential direction,
From this incision, the part closer to the end toward the end face of the metal tube is the part to be excised,
The part to be excised in the metal tube is sandwiched between the cradle and the horn of the ultrasonic vibrator in the radial direction,
Under the sandwiched state, ultrasonic vibration is applied to the excision target site so that the filler and the core wire existing inside the excision target site in the metal tube are separated,
After separation of the filler and the core wire, the portion to be excised in the metal tube is moved away in the direction in which the notch expands, thereby removing the portion to be excised in the metal tube and the filler in the inside thereof. A method for manufacturing a sheath member, characterized in that   The method for manufacturing a sheath member according to claim 1, wherein when the ultrasonic vibration is applied to the part to be excised, a part of the metal tube that is not the part to be excised is fixed. A sheath member material in which a core wire is passed through a metal tube and is filled with an insulating filler, and of the metal tube forming the sheath member material, the end of a certain range in the axial direction from its end surface In the method of manufacturing a sheath member in which the core wire is exposed for a certain length at the end by removing the portion and the filler inside thereof,
Of the outer peripheral surface of the metal tube constituting the material for the sheath member, at a certain position in the axial direction from the end surface of the metal tube, a cut is made so that the tube wall of the metal tube is cut in the circumferential direction,
From this incision, the part closer to the end toward the end face of the metal tube is the part to be excised,
Fixing the part not to be excised in the metal tube,
While sandwiching this part to be excised in the metal tube in the radial direction between the cradle and the horn of the ultrasonic vibrator,
In this clamping, the axis of the horn is inclined with respect to the axis of the part to be excised so that the part to be excised has a component force in a direction separating from the part that is not the part to be excised. Leave
Under the sandwiched state, while applying ultrasonic vibration to the excision target site so that the filler and the core wire existing inside the excision target site in the metal tube are separated,
Even after separation of the filler and the core wire, ultrasonic vibration is applied, and the ultrasonic material is used to move the filler on the inside of the metal tube together with the portion to be excised so that the cut is expanded. The manufacturing method of the sheath member characterized by these.

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