A production equipment for corrugated threading pipe

Abstract

The present application discloses a production device for a corrugated threading tube, including a mandrel and a discharging device, a molding mechanism and a driving mechanism installed on a workbench; a discharging portion is provided at the front end of the discharging device, and the discharging device is suitable for continuously producing threading tube blanks with a circular cross-section along the discharging portion; the molding mechanism is installed on the side of the discharging portion; the mandrel is slidably installed on the discharging portion, and the mandrel is used to mold the deformation segment of the threading tube product; the driving mechanism is matched and connected with the mandrel in the opposite direction of the outlet of the discharging portion, and the driving mechanism is suitable for driving the mandrel to reciprocate along the discharging portion, and then continuously cooperates with the molding mechanism to produce the required threading tube product. The beneficial effects of the present application: a mandrel and a driving mechanism are added on the basis of the traditional threading tube production device, the required deformation segment can be molded by the mandrel, and the mandrel is driven to reciprocate by the driving mechanism, so that the continuous production of the threading tube product can be realized.

Description

Technical Field

[0001] The present application relates to the field of high voltage equipment, and in particular to a high voltage switch device. Background Art

[0002] The bellows is a flexible element consisting of one or more corrugations and straight-edge sections at the ends. As a thin-walled protective component with displacement compensation and high flexibility, it is used to compensate for dimensional changes of pipelines, equipment, etc. caused by mechanical displacement, thermal expansion and contraction or vibration. It has been widely used in the fields of electricity, aviation, aerospace, nuclear power, ships, etc.

[0003] The corrugated conduit is a type of corrugated conduit, which is mainly used for the penetration protection of wires. The wall thickness of traditional corrugated conduits is uniform, so after long-term use, traditional corrugated conduits are prone to fatigue cracking at the gap between adjacent corrugations. In order to improve the service life of traditional corrugated conduits, such as Figure 1 and Figure 2 The figure is a schematic diagram of the structure of an improved corrugated threading tube, in which the tube section corresponding to the inner side of the corrugated groove 110 provided on the side wall of the threading tube product 100 is a deformation section 120, the thickness of the deformation section 120 is greater than the thickness of the other tube sections of the threading tube product 100, and the cross-sectional shape of the deformation section 120 is an arc, so that the stress condition of the threading tube product 100 when bending can be effectively improved to increase the service life of the threading tube product 100. However, the existing production equipment cannot realize the production of the improved corrugated threading tube; therefore, it is necessary to improve the existing production equipment of the corrugated threading tube. Summary of the invention

[0004] The purpose of the present application is to provide a production device capable of producing the improved corrugated threading tube in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: a production equipment for corrugated threading tubes, including a core shaft and a discharge device, a molding mechanism and a driving mechanism installed on a workbench; a discharge portion is provided at the front end of the discharge device, and the discharge device is suitable for continuously producing threading tube blanks with a circular cross-section along the discharge portion; the molding mechanism is installed on the side of the discharge portion; the core shaft is slidably installed on the discharge portion, and the core shaft is used to mold the deformation section of the threading tube product; the driving mechanism is matched and connected with the core shaft in the opposite direction of the outlet of the discharge portion, and the driving mechanism is suitable for driving the core shaft to reciprocate along the discharge portion, and then continuously cooperate with the molding mechanism to produce the required threading tube product.

[0006] Preferably, the center of the mandrel is a through hole, and the mandrel is radially telescopically arranged; the driving mechanism is suitable for connecting with the mandrel along the through hole of the mandrel, and the mandrel, the driving mechanism and the discharge portion are also cooperated by an extrusion structure; the driving mechanism is suitable for driving the mandrel to perform a movement including a first stroke, a second stroke, a third stroke and a fourth stroke; wherein, the first stroke: the mandrel moves along the opening direction of the discharge portion, so that the mandrel is radially contracted by the extrusion structure until it is separated from the formed deformation section; the second stroke: the mandrel is suitable for maintaining a contracted state and moving in the opposite direction of the opening of the discharge portion; the third stroke: the mandrel moves toward the opening direction of the discharge portion again; and in the process of moving, the mandrel is reset from the contracted state to the formed state in the radial direction by the extrusion structure; the fourth stroke: the mandrel maintains the formed state and continues to move along the opening direction of the discharge portion, and cooperates with the forming mechanism to form the deformation section of the threading tube product.

[0007] Preferably, the core shaft includes a plurality of first forming parts and a plurality of second forming parts; the first forming parts and the second forming parts are arranged in a circular pattern, and the first forming parts and the second forming parts are staggered with each other and connected by a traction structure; the first forming part is suitable for cooperating with the extrusion structure, and the driving mechanism is suitable for cooperating and connecting with the first forming part along the through hole of the core shaft; the driving mechanism is suitable for pulling the first forming part to drive the second forming part to move synchronously along the discharge part; and, in the process of movement, the first forming part is expanded and contracted radially by cooperating with the extrusion structure, and then the second forming part is also expanded and contracted radially through the traction structure.

[0008] Preferably, the opening of the angle formed by the two side edges of the cross section of the first forming part gradually increases toward the center direction; the traction structure includes a traction block and a traction groove that are slidably engaged; the traction block and the traction groove are respectively arranged on the opposite side walls of the first forming part and the second forming part; when the first forming part moves radially under the drive of the extrusion structure, the second forming part is suitable for moving radially through the relative sliding of the traction block along the traction groove.

[0009] Preferably, the discharging device includes a supporting roller arranged through the discharging device, and the supporting roller cooperates with the front end of the shell of the discharging device to form the discharging part; the center of the supporting roller is a through hole, and the core shaft is slidably installed on the front center of the supporting roller; the driving mechanism is installed on the side of the discharging device away from the discharging part, and the driving mechanism is suitable for passing through the center of the supporting roller to cooperate with the core shaft.

[0010] Preferably, the driving mechanism includes a telescopic device, a pressure rod and a traction rod; the traction rod is slidably matched with the center of the support roller, the pressure rod is installed at the center of the traction rod through a clutch structure and matched with the support roller through a limiting structure; the two ends of the first forming part are respectively matched with the pressure rod and the support roller through the extrusion structure; the telescopic device is installed on the side of the discharging device away from the discharging part and is connected to the traction rod through the output end; the telescopic device is suitable for driving the traction rod to drive the core shaft to slide back and forth along the center of the support roller; when performing the first stroke, the pressure rod is kept stationary by the limiting structure, so that the first forming part and the pressure rod are connected through the extrusion structure cooperate with the traction rod to perform radial contraction; when performing the second stroke, the pressure rod moves synchronously with the traction rod through the clutch structure, so that the core shaft maintains a contracted state for movement until the pressure rod is disengaged from the first forming part through the limiting structure, and the first forming part and the support roller cooperate with the extrusion structure to continue to maintain a contracted state; when performing the third stroke, the pressure rod moves synchronously with the traction rod again through the clutch structure, and the first forming part and the support roller cooperate with the extrusion structure to perform radial reset; when performing the fourth stroke, the pressure rod continues to move synchronously with the traction rod through the clutch structure until the pressure rod cooperates with the limiting structure again.

[0011] Preferably, the first forming part is elastically connected to the traction rod in the radial direction; the extrusion structure includes a first wedge block and a second wedge block arranged at both ends of the first forming part, a conical groove arranged at the front end of the pressure rod, and a conical hole section arranged at the center of the support roller; when performing a first stroke, the first forming part is suitable for being extruded and matched with the conical groove through the first wedge block, so that the first forming part is elastically contracted in the radial direction; when performing a second stroke, the first wedge block of the first forming part is suitable for being separated from the conical groove, and at the same time, the contracted state of the core shaft is maintained through the cooperation of the second wedge block and the conical hole section; when performing a third stroke, the first forming part moves in a direction away from the conical hole section, and then in the radial direction, the first forming part is suitable for being reset to the forming state under the action of elastic force.

[0012] Preferably, a through groove connecting the center is provided on the middle side wall of the traction rod; the limiting structure includes a first stop block and a second stop block axially spaced and arranged at the center of the support roller, and a third stop block arranged at the rear end of the pressure rod; the first stop block is close to the discharge portion, and the first stop block and the second stop block are both suitable for passing through the through groove to cooperate with the third stop block; when performing the first stroke, the third stop block abuts against the first stop block to keep the pressure rod stationary; when performing the second stroke, the third stop block is suitable for moving from the first stop block to the direction of the second stop block until it abuts and squeezes against the second stop block to drive the pressure rod to disengage from the first forming portion; when performing the third stroke and the fourth stroke, the third stop block is suitable for moving from the second stop block to the direction of the first stop block until it contacts the first stop block.

[0013] Preferably, the clutch structure includes a clutch assembly installed on the pressure rod, and a first limit groove and a second limit groove axially spaced on the central inner wall of the traction rod; the first limit groove is close to the front end of the traction rod; when performing the first stroke, the pressure rod remains stationary so that the second limit groove moves with the traction rod to cooperate with the clutch assembly; when performing the second stroke, the pressure rod cooperates with the second limit groove through the clutch assembly to move axially synchronously with the traction rod until the pressure rod remains stationary again through the limit structure, and then the first limit groove moves with the traction rod to cooperate with the clutch assembly; when performing the third stroke and the fourth stroke, the pressure rod cooperates with the first limit groove through the clutch assembly to move axially synchronously with the traction rod.

[0014] Preferably, the pressure rod is radially provided with an installation groove, and the clutch assembly is installed in the installation groove; the clutch assembly includes a clutch block and a second spring; the clutch block is slidably matched with the installation groove, and the two ends of the second spring are respectively abutted against the clutch block and the bottom of the installation groove, so that the clutch block is matched with the first limit groove or the second limit groove under the elastic force of the second spring.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] Compared with the traditional threading tube production device, a mandrel can be installed in the discharge part of the discharge device, and the mandrel cooperates with the forming mechanism to form the required deformation segment. In addition, a driving mechanism is set to drive the mandrel to reciprocate along the axial direction, so that it can continuously cooperate with the forming mechanism to continuously produce the threading tube products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the partial structure of the improved corrugated wire threading tube in the present invention.

[0018] Figure 2 For the present invention Figure 1 An enlarged schematic diagram of part A in the middle.

[0019] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 4 It is a partial cross-sectional view of the discharging device in the present invention.

[0021] Figure 5 It is a structural schematic diagram of the core shaft in the present invention.

[0022] Figure 6 It is a schematic diagram of the outer structure of the first forming part in the present invention.

[0023] Figure 7 It is a schematic diagram of the inner structure of the first forming part in the present invention.

[0024] Figure 8 It is a schematic structural diagram of the second forming part in the present invention.

[0025] Fig. 9 It is a schematic diagram of the exploded state of the driving mechanism in the present invention.

[0026] Fig.10 For the present invention Fig. 9 An enlarged schematic diagram of part B in the middle.

[0027] Fig.11 It is a structural schematic diagram of the pressure rod in the present invention.

[0028] Fig.12 Schematic diagram of the state of the driving mechanism and the core shaft in the present invention Figure 1 .

[0029] Fig.13 Schematic diagram of the state of the driving mechanism and the core shaft in the present invention Figure 2 .

[0030] Fig.14 Schematic diagram of the state of the driving mechanism and the core shaft in the present invention Figure 3 .

[0031] Fig.15 It is a schematic diagram of the coordination state between the traction rod and the discharging device in the present invention.

[0032] Fig.16 It is a cross-sectional view of the matching structure between the core shaft and the driving mechanism when the core shaft is in a forming state in the present invention.

[0033] Fig.17It is a cross-sectional view of the cooperation structure between the core shaft and the driving mechanism when the core shaft is in a contracted state in the present invention.

[0034] In the figure: a threading tube product 100, a corrugated groove 110, a deformation section 120, a workbench 200, a discharging device 3, a supporting roller 31, a first sliding hole 311, a tapered hole section 312, a second sliding hole 313, a third sliding hole 314, a first stopper 315, a second stopper 316, a core shaft 4, a first forming portion 41, a guide groove 410, a traction block 411, a first wedge block 412, a second wedge block 413, a second forming portion 42, a traction groove 420, a driving mechanism 5, a telescopic device 51, a pressure rod 52, a tapered groove 520, a mounting groove 521, a third stopper 522, a traction rod 53, a through groove 530, a guide rod 531, a first spring 532, a first limiting groove 533, a second limiting groove 534, a clutch assembly 54, a clutch block 541, a second spring 542, and a forming mechanism 6. DETAILED DESCRIPTION

[0035] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0036] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0038] One of the preferred embodiments of the present application is as follows: Figures 3 to 17As shown, a production device for a corrugated threading tube includes a core shaft 4 and a discharging device 3, a forming mechanism 6 and a driving mechanism 5 installed on a workbench 200. A discharging portion is provided at the front end of the discharging device 3, and the discharging device 3 can continuously extrude along the discharging portion to produce a threading tube blank with a circular cross-section. The forming mechanism 6 is installed on the side of the discharging portion; the core shaft 4 is slidably installed on the discharging portion, and the core shaft 4 is used to form a deformation section 120 of the threading tube product 100. The driving mechanism 5 is matched and connected with the core shaft 4 in the opposite direction of the outlet of the discharging portion. The driving mechanism 5 can drive the core shaft 4 to reciprocate along the discharging portion, so that the core shaft 4 can continuously cooperate with the forming mechanism 6 to process the threading tube blank produced by the discharging device 3 into the required threading tube product 100.

[0039] It should be known that the production of the threading tube product 100 is generally continuous, that is, the length of the threading tube product 100 after processing can reach tens or hundreds of meters. Therefore, it is impossible for the core shaft 4 to be set to the same length in order to adapt to the processing length of the threading tube product 100; therefore, in this application, a core shaft 4 of a general length is set and reciprocated in the axial direction to continuously cooperate with the forming mechanism 6, thereby realizing the processing of the continuously produced threading tube blank. Since the core shaft 4 is a structure used to form the inside of the threading tube product 100, it is impossible to use a conventional external drive structure for axial reciprocating drive; it can only be connected to the core shaft 4 inside the discharge part and in the opposite direction of the discharge port of the discharge part.

[0040] In this embodiment, the specific structure and working principle of the discharging device 3 are well known to those skilled in the art. Generally speaking, the discharging device 3 can mix and heat the raw materials; when the raw materials are melted, the molten raw materials can be extruded along the discharging portion to form a threading tube blank with a circular cross-section.

[0041] Specifically, Figure 4 and Figure 12 to Figure 14 As shown, the discharge device 3 includes a shell and a support roller 31 that passes through the discharge device 3; a discharge sleeve with a circular cross-section is extended from the front end of the shell, and a part of the shaft section of the support roller 31 is located in the discharge sleeve to form the above-mentioned discharge portion. The diameter of the support roller 31 is smaller than the inner diameter of the discharge sleeve, so that a discharge port for forming the threading tube blank can be formed between the support roller 31 and the discharge sleeve. The center of the support roller 31 is a through hole, and the core shaft 4 is slidably installed in front of the through hole in the center of the support roller 31; the driving mechanism 5 is installed on the side of the discharge device 3 away from the discharge portion, and the driving mechanism 5 can pass through the center of the support roller 31 to cooperate with the core shaft 4.

[0042] In this embodiment, the specific structure and working principle of the forming mechanism 6 are well known to those skilled in the art. The prior art includes a Chinese invention patent with publication number CN109849315A and the title "A corrugated tube forming machine and a corrugated tube production process based on the corrugated tube forming machine".

[0043] In one embodiment of the present application, the center of the mandrel 4 is a through hole, and the mandrel 4 can be set to be telescopic in the radial direction. The driving mechanism 5 can be connected to the mandrel 4 along the through hole of the mandrel 4; at the same time, the mandrel 4, the driving mechanism 5 and the discharge part are also matched by an extrusion structure. In a molding cycle of the mandrel 4, the driving mechanism 5 can drive the mandrel 4 to move in a first stroke, a second stroke, a third stroke and a fourth stroke; wherein, the first stroke: the mandrel 4 moves along the opening direction of the discharge part so that the mandrel 4 contracts in the radial direction through the extrusion structure until it is separated from the molded deformation section 120. The second stroke: the mandrel 4 can maintain the contracted state and move in the opposite direction of the opening of the discharge part; the third stroke: the mandrel 4 moves again toward the opening direction of the discharge part; and in the process of moving, the mandrel 4 is reset from the contracted state to the molded state in the radial direction through the extrusion structure. The fourth stroke: the mandrel 4 maintains the molded state and continues to move in the opening direction of the discharge part, and cooperates with the molding mechanism 6 to mold the deformation section 120 of the threading tube product 100.

[0044] It is understandable that the mandrel 4 can be formed into the deformed section 120 of the threading tube product 100 by the spiral groove with an arc-shaped cross section provided on the outer wall. Therefore, when the mandrel 4 is being formed, there is a certain matching depth between the mandrel 4 and the threading tube product 100 in the radial direction, so that in the process of the reciprocating movement of the mandrel 4, in order to avoid the mandrel 4 from interfering with the deformed section 120 of the formed threading tube product 100, the mandrel 4 needs to be retracted toward the center to break away from the contact with the deformed section 120. Then, if the mandrel 4 wants to be retracted inward, the mandrel 4 must be provided with a through hole in the center to ensure that the mandrel 4 has space to retract inward.

[0045] At the same time, since the production of the threading tube blank is continuous, the contraction process of the core shaft 4 needs to be synchronized with the production of the threading tube blank in the axial direction, that is, in the first stroke, the core shaft 4 not only needs to move axially toward the opening direction of the discharge portion, but also needs to perform radial contraction movement, so that the core shaft 4 and the formed deformation section 120 are relatively stationary in the axial direction, which can further avoid interference between the spiral groove of the core shaft 4 and the deformation section 120.

[0046] It can also be understood that the axial movement speed of the mandrel 4 needs to match the production speed of the threading tube blank. Generally speaking, in the first stroke, the third stroke and the fourth stroke, the axial movement speed of the mandrel 4 needs to be equal to the production speed of the threading tube blank, and in the second stroke, the axial movement speed of the mandrel 4 needs to be faster than the production speed of the threading tube blank. In addition, in order to ensure that the deformation segment 120 formed in two adjacent molding cycles of the mandrel 4 can be continuous, it is necessary that at the end of the third stroke or the beginning of the fourth stroke, the spiral groove on the front shaft segment of the mandrel 4 can be matched with the rear of the deformation segment 120 formed in the previous molding cycle.

[0047] Therefore, when performing the third stroke, the mandrel 4 not only needs to move axially toward the opening direction of the discharge portion, but also needs to perform radial resetting movement to ensure that the mandrel 4 remains relatively stationary in the axial direction relative to the produced threading tube blank, so that the spiral groove on the front shaft section of the mandrel 4 can move radially to fit with the rear part of the deformation section 120 formed in the previous molding cycle. Subsequently, in the fourth process, the unprocessed threading tube blank is processed through the cooperation of the rear shaft section of the mandrel 4 and the molding mechanism 6. By repeating the above molding cycle process, the desired threading tube product 100 can be continuously obtained.

[0048] In this embodiment, Figure 5 , Fig.16 and Fig.17 As shown, the mandrel 4 includes a plurality of first forming parts 41 and a plurality of second forming parts 42; the first forming parts 41 and the second forming parts 42 are arranged in a circumferential manner, and the first forming parts 41 and the second forming parts 42 are interlaced with each other and connected by a traction structure, so that the first forming parts 41 and the second forming parts 42 form a whole in the axial direction. The first forming part 41 can cooperate with the extrusion structure, and the driving mechanism 5 can be connected with the first forming part 41 along the through hole of the mandrel 4. When processing the threading tube product 100, the driving mechanism 5 can pull the first forming part 41 to drive the second forming part 42 to synchronously reciprocate axially along the discharge part; and during the movement, the first forming part 41 can be expanded and contracted in the radial direction by cooperating with the extrusion structure, and then the second forming part 42 is also expanded and contracted in the radial direction by the traction structure.

[0049] It should be known that the specific number of the first forming parts 41 and the second forming parts 42 can be selected and set by those skilled in the art according to actual needs. Figure 5 , Fig.16 and Fig.17 As shown, the number of the first forming parts 41 and the number of the second forming parts 42 are both four, and the four first forming parts 41 and the four second forming parts 42 are arranged at intervals and staggered with each other, and surround each other to form the core shaft 4.

[0050] It can be understood that if the core shaft 4 with a circular cross-section is to be able to shrink radially, and during the shrinkage process, the side walls between the first forming part 41 and the second forming part 42 need to fit each other, then there needs to be an angle on both sides of the cross-section of the first forming part 41, and the opening of the angle gradually increases in the direction toward the center of the core shaft 4, and then when the first forming part 41 moves radially toward the center of the core shaft 4, a lateral gap can be generated between the first forming part 41 and the second forming part 42; the lateral gap is the reserved space required for the second forming part 42 to move toward the center of the core shaft 4; and then the second forming part 42 can be driven by the traction structure to move radially toward the center of the core shaft 4 synchronously with the first forming part 41, but the moving distance of the second forming part 42 is smaller than the moving distance of the first forming part 41. In the actual design process, it is only necessary to ensure that the radial moving distance X of the second forming part 42 is greater than or equal to the depth of the spiral groove set on the outside of the core shaft 4.

[0051] Specifically, Figure 6 , Figure 7 , Figure 8 , Fig.16 and Fig.17 As shown, the traction structure includes a slidably engaged traction block 411 and a traction groove 420; the traction block 411 and the traction groove 420 are respectively arranged on the opposite side walls of the first molding part 41 and the second molding part 42; when the first molding part 41 moves radially under the drive of the extrusion structure, the second molding part 42 can move radially through the relative sliding of the traction block 411 along the traction groove 420.

[0052] It can be understood that the cross-sectional shape of the traction block 411 and the traction groove 420 is L-shaped or T-shaped, that is, the sliding fit between the first molded portion 41 and the second molded portion 42 through the traction block 411 and the traction groove 420 can ensure that only the traction block 411 can slide relative to the traction groove 420 between the first molded portion 41 and the second molded portion 42. Further, when the first molded portion 41 moves in the radial direction, the second molded portion 42 is forced to synchronously slide in the radial direction through the relative sliding of the traction block 411 along the traction groove 420.

[0053] It should be known that in order to improve the stability of the matching structure between the first molding part 41 and the second molding part 42, the relative side walls of the first molding part 41 and the second molding part 42 can be matched and connected by multiple traction structures, and the multiple traction structures can be spaced apart along the axial direction of the core shaft 4.

[0054] One of the embodiments of the present application is as follows: Figures 9 to 17As shown, the driving mechanism 5 includes a telescopic device 51, a pressure rod 52 and a traction rod 53. The telescopic device 51 is installed on the side of the discharging device 3 away from the discharging part; the traction rod 53 can be slidably matched with the through hole in the center of the support roller 31, one end of the traction rod 53 can be extended into the through hole of the core shaft 4 and be matched and connected therewith, and the other end of the traction rod 53 can be extended to the outside of the discharging device 3 and connected with the output end of the telescopic device 51; the pressure rod 52 is installed at the center of the traction rod 53 through a clutch structure and is matched with the support roller 31 through a limiting structure, the front end of the pressure rod 52 can be extended to the outside of the front end of the traction rod 53 to be used for matching with the front end of the first forming part 41 through an extrusion structure, and the rear end of the first forming part 41 can be matched with the support roller 31 through an extrusion structure.

[0055] When processing the threading tube product 100, the telescopic device 51 can drive the traction rod 53 to drive the core shaft 4 to slide back and forth along the center of the support roller 31; so that when performing the first stroke, the pressure rod 52 can be kept stationary by the limiting structure, and then the first forming part 41 and the pressure rod 52 cooperate with the extrusion structure to shrink in the radial direction; then, when performing the second stroke, the pressure rod 52 can move synchronously with the traction rod 53 through the clutch structure, so that the core shaft 4 remains in a contracted state for movement, until the pressure rod 52 is separated from the first forming part 41 through the limiting structure, and in the process of the first forming part 41 and the pressure rod 52 separating, the first forming part 41 and the support roller 31 are in a state of contraction. The extrusion structure can be used to cooperate to continue to maintain the contracted state of the core shaft 4; then when performing the third stroke, the pressure rod 52 can move synchronously with the traction rod 53 again through the clutch structure, and the first forming part 41 and the support roller 31 are radially reset through the cooperation of the extrusion structure until the core shaft 4 is reset from the contracted state to the formed state. In the process of radial resetting of the core shaft 4, the core shaft 4 gradually approaches the pressure rod 52 until the two are in contact again; finally, when performing the fourth stroke, the pressure rod 52 can continue to move synchronously with the traction rod 53 through the clutch structure until it moves to the initial position of the first stroke, and at this time the pressure rod 52 just cooperates with the limiting structure again.

[0056] It should be known that the specific structure and working principle of the telescopic device 51 are well known to those skilled in the art. Common telescopic devices 51 include linear motors, hydraulic cylinders, and air cylinders.

[0057] In this embodiment, Figure 4As shown, the through hole at the center of the support roller 31 includes a first sliding hole 311, a tapered hole section 312, a second sliding hole 313 and a third sliding hole 314 from front to back; wherein, the diameter of the first sliding hole 311 matches the diameter of the mandrel 4 in the formed state, the diameter of the second sliding hole 313 matches the diameter of the mandrel 4 in the compressed state, the first sliding hole 311 and the second sliding hole 313 pass through the tapered hole section 312, and the diameter of the third sliding hole 314 is smaller than the diameter of the second sliding hole 313 and matches the diameter of the traction rod 53. The traction rod 53 is slidably installed in the third sliding hole 314 and extends into the through hole of the mandrel 4 to connect with the mandrel 4, so that the mandrel 4 can slide back and forth between the first sliding hole 311, the tapered hole section 312 and the second sliding hole 313 under the traction of the traction rod 53.

[0058] Specifically, when performing the first stroke and the fourth stroke, the core shaft 4 can slide along the first sliding hole 311; when performing the second stroke, the core shaft 4 can slide from the first sliding hole 311 through the tapered hole section 312 until a part of the shaft section is located in the second sliding hole 313; when performing the third stroke, the core shaft 4 can be separated from the second sliding hole 313 and slide along the tapered hole section 312 until the entire shaft section is located in the first sliding hole 311.

[0059] In this embodiment, Figure 6 , Figure 7 and Figures 11 to 14 As shown, the first forming part 41 is elastically connected to the traction rod 53 in the radial direction. The extrusion structure includes a first wedge 412 and a second wedge 413 arranged at both ends of the first forming part 41, a tapered groove 520 arranged at the front end of the pressure rod 52, and a tapered hole section 312 arranged at the center of the support roller 31. When performing the first stroke, the first forming part 41 can be extruded and matched with the tapered groove 520 through the first wedge 412, so that the first forming part 41 can elastically shrink in the radial direction while moving axially. When performing the second stroke, the mandrel 4 slides from the first sliding hole 311 to the second sliding hole 313. When the mandrel 4 slides from the tapered hole section 312 to the second sliding hole 313, the first wedge 412 of the first forming part 41 can be separated from the tapered groove 520 of the pressure rod 52, and the first forming part 41 can maintain the contracted state of the mandrel 4 through the cooperation of the second wedge 413 with the tapered hole section 312 and the second sliding hole 313. When performing the third stroke, the core shaft 4 moves in the direction away from the tapered hole section 312, so that while the first forming part 41 moves axially, it can also drive the second forming part 42 to be synchronously reset to the forming state of the core shaft 4 in the radial direction through elastic force.

[0060] Specifically, Figure 7 , Fig. 9 , Fig.10 , Fig.12 , Fig.13 , Fig.14 , Fig.16 and Fig.17 As shown, at least one guide groove 410 is provided inside the first forming part 41; the traction rod 53 is provided with multiple rows of guide rods 531 corresponding to the number and position of the first forming part 41 along the circumferential direction, the extension direction of the guide rods 531 is parallel to the radial direction of the traction rod 53, each row includes at least one guide rod 531, the guide rods 531 can be slidably matched with the corresponding guide groove 410, and the guide rods 531 are sleeved with first springs 532, one end of the first spring 532 is against the first forming part 41, and the other end of the first spring 532 is against the traction rod 53. Therefore, when the mandrel 4 is contracted, the first forming part 41 can slide along the guide rod 531 through the guide groove 410 and compress the first spring 532; when the mandrel 4 is reset to the forming state, the first forming part 41 can slide along the guide rod 531 under the elastic force of the first spring 532 to reset.

[0061] It is understandable that in order to ensure that the mandrel 4 remains stable in the radial direction during the processing of the threading tube product 100, the first spring 532 needs to be in a compressed state at all times. In order to further improve the processing stability of the mandrel 4, a plurality of guide grooves 410 spaced apart along the axial direction may be provided on the first forming portion 41, and the number of guide rods 531 in each row on the corresponding traction rod 53 may also be multiple, and the multiple guide rods 531 in each row are also spaced apart along the axial direction and elastically matched with the corresponding guide grooves 410 through the first spring 532.

[0062] In this embodiment, Fig. 9 , Fig.11 and Fig.15As shown, the middle side wall of the traction rod 53 is provided with a through groove 530 connected to the center. The limiting structure includes a first stopper 315 and a second stopper 316 axially spaced and arranged on the inner wall of the third sliding hole 314 at the center of the support roller 31, and a third stopper 522 arranged at the rear end of the pressure rod 52; wherein the first stopper 315 is close to the discharge portion, and the first stopper 315 and the second stopper 316 can both extend into the through groove 530; the third stopper 522 is located between the first stopper 315 and the second stopper 316 and can cooperate with the first stopper 315 and the second stopper 316 respectively. Therefore, when performing the first stroke, the third stopper 522 can abut against the first stopper 315, so that the movement of the pressure rod 52 toward the opening direction of the discharge portion is limited and remains stationary. When the second stroke is performed, the third stopper 522 can move from the first stopper 315 to the second stopper 316 until it contacts and squeezes the second stopper 316; and then the second stopper 316 can limit the reverse movement of the pressing rod 52 toward the opening of the discharge portion, so that the pressing rod 52 can be stationary to achieve the disengagement from the first wedge 412 on the first forming portion 41. When the third and fourth strokes are performed, the third stopper 522 can move from the second stopper 316 to the first stopper 315 until the third stopper 522 contacts the first stopper 315 again.

[0063] It is understandable that during the reciprocating movement of the mandrel 4, the mandrel 4 needs to remain stationary in the circumferential direction, that is, the mandrel 4 can only move axially. Therefore, the width of the first stopper 315 and the second stopper 316 can be adapted to the width of the through slot 530, so that when the traction rod 53 moves axially, the through slot 530 can be slidably matched with the first stopper 315 and the second stopper 316 to limit the position in the circumferential direction.

[0064] In this embodiment, Figures 11 to 14 As shown, the clutch structure includes a clutch assembly 54 installed on the pressure rod 52, and a first limiting groove 533 and a second limiting groove 534 axially spaced and arranged on the central inner wall of the traction rod 53; wherein the first limiting groove 533 is close to the front end of the traction rod 53. Initially, the clutch assembly 54 can cooperate with the first limiting groove 533; when performing the first stroke, the pressure rod 52 remains stationary, so that the second limiting groove 534 can move with the traction rod 53 to cooperate with the clutch assembly 54; when performing the second stroke, the pressure rod 52 can move axially synchronously with the traction rod 53 through the clutch assembly 54 and the second limiting groove 534, until the pressure rod 52 remains stationary again through the limiting structure, and then the first limiting groove 533 can move with the traction rod 53 to cooperate with the clutch assembly 54 again; when performing the third and fourth strokes, the pressure rod 52 moves axially synchronously with the traction rod 53 to the initial position through the clutch assembly 54 and the first limiting groove 533.

[0065] It can be understood that the bevel angles of the inclined surfaces of the first wedge block 412 and the second wedge block 413 at both ends of the first molding portion 41 are equal; then the spacing between the first limiting groove 533 and the second limiting groove 534 is exactly equal to the axial fitting distance between the first wedge block 412 and the tapered groove 520 or the axial fitting distance between the second wedge block 413 and the tapered hole section 312 when the core shaft 4 is compressed or released.

[0066] It should be known that in the second process, since the elastic force generated by the first spring 532 when the core shaft 4 contracts can generate an axial component force through the cooperation of the first wedge block 412 and the tapered groove 520, the axial limiting force generated by the cooperation of the clutch assembly 54 with the first limiting groove 533 or the second limiting groove 534 needs to be at least greater than the axial component force of the elastic force. There are many ways to achieve the above purpose, including but not limited to the following three: first, adjust the elastic coefficient of the first spring 532; second, adjust the cooperation depth of the first limiting groove 533 and the second limiting groove 534 with the clutch assembly 54; third, adjust the number of clutch structures.

[0067] Specifically, Figures 11 to 14 As shown, the pressure rod 52 is provided with a mounting groove 521 in the radial direction, and the clutch assembly 54 is installed in the mounting groove 521. The clutch assembly 54 includes a clutch block 541 and a second spring 542; the clutch block 541 is slidably matched with the mounting groove 521, and the two ends of the second spring 542 are respectively against the clutch block 541 and the bottom of the mounting groove 521, so that the clutch block 541 is matched with the first limiting groove 533 or the second limiting groove 534 under the elastic force of the second spring 542.

[0068] For ease of understanding, a processing cycle of the threading tube product 100 by the core shaft 4 in the present application may be described in detail below.

[0069] (I) Initially:

[0070] like Fig.16 As shown, the mandrel 4 is in a formed state.

[0071] At this time, if Fig.12 As shown, the first wedge block 412 of the core shaft 4 and the tapered groove 520 of the pressure rod 52 are in a close contact state; the clutch assembly 54 is limitedly matched with the first limiting groove 533 through the clutch block 541.

[0072] At this time, if Fig.15 As shown in (1), the third stopper 522 at the rear end of the pressure rod 52 is in a close contact state with the first stopper 315; at this time, the distance between the second stopper 316 and the corresponding side of the through groove 530 is a.

[0073] (II) First trip:

[0074] The traction rod 53 is driven by the telescopic device 51 to move axially along the opening direction of the discharge portion.

[0075] In this process, due to the cooperation between the clutch assembly 54 and the first limiting groove 533, the pressure rod 52 has a tendency to move synchronously with the traction rod 53; however, if Fig.15 As shown in (1) to (2), the first stopper 315 limits the axial movement of the pressure rod 52 by the abutment between the first stopper 315 and the third stopper 522, so that the pressure rod 52 remains stationary during the first stroke of the core shaft 4. At this time, the distance between the second stopper 316 and the corresponding side of the through groove 530 is b, and the traction rod 53 moves axially by a distance ab.

[0076] In this process, if Fig.13 and Fig.17 As shown, due to the stationary state of the pressure rod 52, the first molded portion 41 can be squeezed by the first wedge block 412 and the conical groove 520 at the front end of the pressure rod 52 during the movement of the core shaft 4 along the traction rod 53, and then the first molded portion 41 can perform a radial contraction movement along the guide rod 531 to compress the first spring 532, and the second molded portion 42 can perform a radial contraction movement synchronously with the first molded portion 41 with the cooperation of the traction block 411 and the traction groove 420, until the second molded portion 42 shrinks radially a distance X.

[0077] During this process, since the pressure rod 52 is stationary, the traction rod 53 can squeeze the clutch block 541 to slide into the installation groove 521 and compress the second spring 542, until the second limiting groove 534 moves to face the installation groove 521, and the clutch block 541 can be limitedly matched with the second limiting groove 534 under the elastic force of the second spring 542. Then the distance between the first limiting groove 533 and the second limiting groove 534 is exactly equal to ab.

[0078] (III) Second trip:

[0079] First, the traction rod 53 is driven by the telescopic device 51 to axially move in the opposite direction of the opening of the discharge portion by the spacing distance between the first stopper 315 and the second stopper 316 .

[0080] In this process, if Fig.15 As shown in (3), due to the cooperation between the clutch assembly 54 and the second limiting groove 534, the pressure rod 52 can maintain the state of being squeezed with the core shaft 4 and move synchronously with the traction rod 53 until the third stopper 522 at the rear end of the pressure rod 52 contacts the second stopper 316; at this time, as shown in FIG. Fig.14 As shown, the second wedge block 413 of the first forming portion 41 in the core shaft 4 just passes over the tapered hole section 312 of the central through hole of the supporting roller 31 to be located at the end position of the second sliding hole 313 .

[0081] Subsequently, the traction rod 53 is driven by the telescopic device 51 to move axially by a distance ab in the opposite direction of the opening of the discharge portion.

[0082] In this process, if Fig.15 As shown in (3), due to the abutment between the third stopper 522 and the second stopper 316, the axial movement of the pressing rod 52 is restricted to keep it stationary.

[0083] In this process, if Fig.14 As shown, the core shaft 4 can continue to move with the traction rod 53 until the second wedge block 413 of the first forming part 41 and part of the shaft section are located in the second sliding hole 313; at this time, due to the stationary state of the pressure rod 52, the first wedge block 412 of the first forming part 41 is separated from the conical groove 520 at the front end of the pressure rod 52 and a gap is generated.

[0084] In this process, if Fig.14 As shown, due to the stationary state of the pressure rod 52, the traction rod 53 can squeeze the clutch block 541 to shrink into the installation groove 521 and compress the second spring 542 until the first limiting groove 533 is opposite to the installation groove 521. The clutch block 541 can be limitedly matched with the first limiting groove 533 under the elastic force of the second spring 542.

[0085] (IV) The third journey:

[0086] Driven by the telescopic device 51 , the traction rod 53 moves axially along the opening direction of the discharge portion until the second wedge block 413 of the first forming portion 41 is located in the first sliding hole 311 after passing through the second sliding hole 313 and the tapered hole section 312 .

[0087] During this process, due to the cooperation between the clutch assembly 54 and the first limiting groove 533 , the pressing rod 52 can move synchronously with the traction rod 53 .

[0088] Moreover, when the second wedge block 413 of the first molding part 41 cooperates with the tapered hole section 312, the first molding part 41 can perform radial reset movement under the elastic force of the first spring 532 until the first wedge block 412 of the first molding part 41 is again fitted with the tapered groove 520 at the front end of the pressure rod 52. At this time, the core shaft 4 is in a molding state.

[0089] (V) Fourth journey:

[0090] The traction rod 53 is driven by the telescopic device 51 to move axially along the opening direction of the discharge portion until the third stopper 522 at the rear end of the pressure rod 52 fits with the first stopper 315 .

[0091] During this process, the pressure rod 52 can move synchronously with the traction rod 53 through the cooperation between the clutch assembly 54 and the first limiting groove 533 .

[0092] During this process, the core shaft 4 can cooperate with the forming mechanism 6 to realize processing of the threading hole blank into the required threading tube product 100 .

[0093] It should be known that Fig.13 and Fig.15 The direction indicated by the dashed arrow is the moving direction of the corresponding component.

[0094] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A production equipment for a corrugated threading tube, characterized in that: include: A discharging device, the discharging device is installed on a workbench, and a discharging portion for producing a threading tube blank with a circular cross-section is provided at the front end of the discharging device; A forming mechanism, the forming mechanism is installed on the workbench and is located on the side of the discharge portion; A mandrel, the mandrel being slidably mounted on the discharge portion, the mandrel being used to form a deformation section of a threading tube product; and A driving mechanism is installed on the workbench, and the driving mechanism is connected with the core shaft in the opposite direction of the outlet of the discharge portion. The driving mechanism is suitable for driving the core shaft to reciprocate along the discharge portion, and then continuously cooperates with the forming mechanism to process the threading tube blank into the required threading tube product.

2. The production equipment of the corrugated threading tube according to claim 1, characterized in that: The center of the mandrel is a through hole, and the mandrel is retractable in the radial direction; the driving mechanism is suitable for being connected to the mandrel along the through hole of the mandrel, and the mandrel, the driving mechanism and the discharge portion are also matched through an extrusion structure; the driving mechanism is suitable for driving the mandrel to move in a first stroke, a second stroke, a third stroke and a fourth stroke; Wherein, in the first stroke, the mandrel moves along the opening direction of the discharge portion, so that the mandrel contracts radially through the extrusion structure until it is separated from the formed deformation section; Second stroke: the mandrel is adapted to maintain a contracted state and move in the opposite direction of the opening of the discharge portion; The third stroke: the mandrel moves again toward the opening direction of the discharge portion; and during the movement, the mandrel is restored from the contracted state to the formed state in the radial direction through the extrusion structure; Fourth stroke: the core shaft maintains the forming state and continues to move along the opening direction of the discharge portion, and cooperates with the forming mechanism to form a deformation section of the threading tube product.

3. The production equipment of the corrugated threading tube according to claim 2, characterized in that: The core shaft includes a plurality of first forming parts and a plurality of second forming parts; the first forming parts and the second forming parts are arranged in a circular pattern, and the first forming parts and the second forming parts are staggered with each other and connected by a traction structure; the first forming part is suitable for cooperating with the extrusion structure, and the driving mechanism is suitable for cooperating and connecting with the first forming part along the through hole of the core shaft; the driving mechanism is suitable for pulling the first forming part to drive the second forming part to move synchronously along the discharge part; and, in the process of movement, the first forming part is expanded and contracted radially by cooperating with the extrusion structure, and then the second forming part is also expanded and contracted radially through the traction structure.

4. The production equipment of the corrugated threading tube according to claim 3, characterized in that: The opening of the angle formed by the two side edges of the cross section of the first forming part gradually increases toward the center direction; the traction structure includes a traction block and a traction groove that are slidably engaged; the traction block and the traction groove are respectively arranged on the opposite side walls of the first forming part and the second forming part; when the first forming part moves radially under the drive of the extrusion structure, the second forming part is suitable for moving radially through the relative sliding of the traction block along the traction groove.

5. The production equipment of the corrugated threading tube according to claim 3, characterized in that: The discharging device includes a supporting roller which is arranged through the discharging device, and the supporting roller cooperates with the front end of the shell of the discharging device to form the discharging part; the center of the supporting roller is a through hole, and the core shaft is slidably installed in the front center of the supporting roller; the driving mechanism is installed on the side of the discharging device away from the discharging part, and the driving mechanism is suitable for passing through the center of the supporting roller to cooperate with the core shaft.

6. The production equipment of the corrugated threading tube according to claim 5, characterized in that: The driving mechanism comprises: A traction rod, the traction rod being slidably engaged with the center of the support roller; A pressure rod, the pressure rod is installed at the center of the traction rod through a clutch structure and cooperates with the support roller through a limiting structure; two ends of the first forming part are respectively cooperated with the pressure rod and the support roller through the extrusion structure; and A telescopic device, the telescopic device is installed on a side of the discharging device away from the discharging portion and connected to the traction rod through an output end; the telescopic device is suitable for driving the traction rod to drive the mandrel to slide back and forth along the center of the supporting roller; When performing the first stroke, the pressing rod is kept stationary by the limiting structure, and then the first forming portion cooperates with the pressing rod through the extrusion structure to perform radial contraction; When performing the second stroke, the pressure rod moves synchronously with the traction rod through the clutch structure, so that the mandrel remains in a contracted state for movement, until the pressure rod is disengaged from the first forming part through the limiting structure, and the first forming part and the supporting roller cooperate through the extrusion structure to continue to remain in a contracted state; When the third stroke is performed, the pressure rod moves synchronously with the traction rod again through the clutch structure, and the first forming portion and the support roller are reset in the radial direction through the cooperation of the extrusion structure; When the fourth stroke is performed, the pressure rod continues to move synchronously with the traction rod through the clutch structure until the pressure rod is matched with the limiting structure again.

7. The production equipment of the corrugated threading tube according to claim 6, characterized in that: The first forming part is elastically connected to the traction rod in the radial direction; the extrusion structure includes a first wedge block and a second wedge block arranged at both ends of the first forming part, a tapered groove arranged at the front end of the pressure rod, and a tapered hole section arranged at the center of the support roller; When performing the first stroke, the first forming portion is adapted to be extruded and matched with the tapered groove through the first wedge block, so that the first forming portion is elastically contracted in the radial direction; When performing the second stroke, the first wedge block of the first forming portion is adapted to be separated from the tapered groove, and the contracted state of the mandrel is maintained by the cooperation between the second wedge block and the tapered hole section; When the third stroke is performed, the first forming portion moves in a direction away from the tapered hole section, and then in the radial direction, the first forming portion is suitable for being reset to a forming state under the action of elastic force.

8. The production equipment of the corrugated threading tube according to claim 6, characterized in that: The middle side wall of the traction rod is provided with a through groove connected to the center; the limiting structure includes a first stopper and a second stopper axially spaced and arranged at the center of the support roller, and a third stopper arranged at the rear end of the pressure rod; the first stopper is close to the discharge portion, and the first stopper and the second stopper are both suitable for passing through the through groove to cooperate with the third stopper; When performing the first stroke, the third stopper abuts against the first stopper to keep the pressure rod stationary; When performing the second stroke, the third stopper is adapted to move from the first stopper to the second stopper until it abuts against and presses against the second stopper, so as to drive the pressing rod to disengage from the first forming portion; When performing the third stroke and the fourth stroke, the third stopper is adapted to move from the second stopper toward the first stopper until it contacts the first stopper.

9. The production equipment of the corrugated threading tube according to claim 6, characterized in that: The clutch structure comprises a clutch assembly mounted on the pressure rod, and a first limiting groove and a second limiting groove axially spaced apart and arranged on the central inner wall of the traction rod; the first limiting groove is close to the front end of the traction rod; When performing the first stroke, the pressure rod remains stationary, so that the second limiting groove moves with the traction rod to cooperate with the clutch assembly; When performing the second stroke, the pressure rod cooperates with the second limiting groove through the clutch assembly to synchronously move axially with the traction rod until the pressure rod is kept stationary again by the limiting structure, and then the first limiting groove moves with the traction rod to cooperate with the clutch assembly; When performing the third stroke and the fourth stroke, the pressure rod cooperates with the first limiting groove through the clutch assembly to move axially synchronously with the traction rod.

10. The production equipment of the corrugated threading tube according to claim 9, characterized in that: The pressure rod is radially provided with an installation groove, and the clutch assembly is installed in the installation groove; the clutch assembly includes a clutch block and a second spring; the clutch block is slidably matched with the installation groove, and the two ends of the second spring are respectively abutted against the clutch block and the bottom of the installation groove, so that the clutch block is matched with the first limit groove or the second limit groove under the elastic force of the second spring.

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