A fully automatic heat shrink tube casing machine and casing method

Abstract

The present invention provides a fully automatic heat shrink tube casing machine and casing method, the casing machine comprises: a heat shrink tube supply part, which is suitable for supplying heat shrink tubes; a heat shrink tube transfer part, which has a fixed rod, the fixed rod is suitable for fixing the heat shrink tube and transferring the heat shrink tube to a predetermined tube insertion position; a tube insertion part, which has a clamping channel, the first opening of the clamping channel is for the wire harness to be inserted, the second opening is for the fixed rod to be pulled out, and the clamping channel is provided with a through hole connected to the outside, wherein the second opening is provided with a limiting unit to limit the heat shrink tube at the tube insertion position when the fixed rod leaves the clamping channel, the feeding wire harness is inserted into the heat shrink tube at the tube insertion position until the terminal on the wire harness passes through the second opening, and a hot air flow is supplied into the clamping channel through the through hole to perform a fixed connection between the wire harness and the heat shrink tube; a hot air flow supply part, which supplies a hot air flow to the tube insertion part. In this way, the coating quality of the heat shrink tube on the wire terminal can be improved, and the casing accuracy of the heat shrink tube can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of wire harness processing equipment, and in particular to a full-automatic heat shrink tube casing machine and a casing method. Background Art

[0002] The application of heat shrink tubing to insulated wires is a necessary step in the processing and manufacturing of distribution lines. The heat shrink tubing is applied to the wire terminals and heated and tightened, which can effectively insulate the terminals and wires.

[0003] Traditionally, the work of applying heat shrink tubing is done manually, which has low production efficiency and high labor costs. Therefore, highly automated heat shrink tubing machines have appeared on the market. However, the heat shrink tubing machine in the related art has poor coating quality on the wire terminals, and cannot ensure that the tube mouth of the heat shrink tubing is flush with the end face of the terminal, resulting in large errors. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent, namely, to improve the coating quality of the heat shrink tube on the wire terminal, ensure that the tube mouth of the heat shrink tube is flush with the end face of the terminal, and improve the sleeve accuracy of the heat shrink tube. To this end, one object of the present invention is to provide a fully automatic heat shrink tube sleeve machine.

[0005] Another object of the present invention is to provide a heat shrink tubing method.

[0006] To achieve the above object, the present invention proposes, in one aspect, a fully automatic heat shrink tube casing machine, which comprises: a heat shrink tube supply unit, a heat shrink tube transfer unit, a tube threading unit and a hot air flow supply unit;

[0007] The heat shrink tube supply part is suitable for supplying heat shrink tubes;

[0008] The heat shrink tube transfer unit has a fixing rod, and the fixing rod is suitable for fixing the heat shrink tube and transferring the heat shrink tube supplied by the heat shrink tube supply unit to a predetermined tube insertion position;

[0009] The tube-penetrating portion has a clamping channel, a first opening of the clamping channel is for inserting the wire harness, a second opening is for pulling out the fixing rod, and a through hole communicating with the outside is provided on the clamping channel, wherein a limiting unit is provided on the second opening to limit the heat shrink tube at the tube-penetrating position when the fixing rod leaves the clamping channel, the feeding wire harness is inserted into the heat shrink tube at the tube-penetrating position until the terminal on the wire harness passes through the second opening, and a hot air flow is supplied into the clamping channel through the through hole to perform a fixed connection between the wire harness and the heat shrink tube;

[0010] The hot air flow supplying portion is adapted to supply a hot air flow to the clamping channel.

[0011] According to the full-automatic heat shrink tube sleeve machine of the present invention, the heat shrink tube is fixed by a fixing rod and is transferred to a predetermined tube insertion position, so that when the fixing rod transfers the heat shrink tube to the tube insertion position, the fixing rod cooperates with the limiting unit of the tube insertion part, so that the heat shrink tube can be accurately located at the tube insertion position; and through the limiting unit of the tube insertion part, when the wire harness is inserted into the heat shrink tube, the end face of the wire harness terminal can be flush with the tube mouth of the heat shrink tube; after being flush, the heat shrink tube and the wire harness remain stationary, and the heat shrink tube is fixed on the wire harness by supplying hot air flow to the clamping channel, thereby ensuring the accurate position of the heat shrink tube sleeve, improving the covering quality of the heat shrink tube on the wire terminal, ensuring that the port of the heat shrink tube is flush with the end face of the terminal, and improving the sleeve accuracy of the heat shrink tube.

[0012] In addition, the fully automatic heat shrink tubing machine proposed in the above embodiment of the present invention may also have the following additional technical features:

[0013] According to an embodiment of the present invention, the heat shrink tube supply unit has a heat shrink tube feeding assembly and a cutting blade. The heat shrink tube feeding assembly will transport the continuous heat shrink tube formed by arranging and connecting the same type of heat shrink tubes on a strip-shaped carrier to a predetermined cutting position. The cutting blade is used to cut and supply the heat shrink tube from the continuous heat shrink tube located at the cutting position, and the cutting blade has a scissors structure.

[0014] According to an embodiment of the present invention, the cutting blade includes a first blade and a second blade, the blade edge of the first blade faces the blade edge of the second blade and is staggered to jointly define a shearing opening; the first blade and the second blade are connected to an opening and closing driving member so that the first blade and the second blade are driven to open and close by the opening and closing driving member so that the shearing opening shears the heat shrink tube.

[0015] According to an embodiment of the present invention, the heat shrink tube supply unit includes a rounding tube, the inner diameter of the rounding tube is equal to the outer diameter of the heat shrink tube, and the rounding tube is vertically arranged and perpendicular to the shear cut.

[0016] According to an embodiment of the present invention, the fixing rod is provided with a plurality of radially inwardly concave grooves along the fixing rod, and the plurality of grooves are circumferentially distributed on the outer circumference of the fixing rod so that the outer circumference of the fixing rod constructs a positioning portion for abutting the inner wall of the heat shrink tube.

[0017] According to an embodiment of the present invention, the cross section of the fixing rod is in the shape of a "+".

[0018] According to an embodiment of the present invention, the heat shrink tube transfer part includes a transfer drive member, which has a rotating unit and a moving unit. The moving end of the moving unit is connected to the fixed rod to drive the fixed rod to move, and the rotating unit is connected to the moving unit to drive the mobile unit to rotate and drive the fixed rod to rotate.

[0019] According to an embodiment of the present invention, the clamping channel can be switched between an open state and a closed state to receive the heat shrink tube; the inner wall surface of the clamping channel is provided with a step protruding radially inward at the second opening to construct the limiting unit, and when the fixing rod leaves the clamping channel, the limiting unit blocks the heat shrink tube so that the heat shrink tube is detached from the fixing rod and limited at the tube insertion position.

[0020] According to an embodiment of the present invention, it also includes a reflux chamber movably arranged between a first position and a second position, and the top of the reflux chamber is open; the clamping channel is movable between the second position and the third position; the hot air flow supply part includes a heating tube, one end of the heating tube is connected to the air source supply part, and the other end faces the second position, when the clamping channel is located at the second position, the heating tube supplies hot air flow to the clamping channel through the through hole; when the reflux chamber is located at the second position, the heating tube supplies hot air flow to the wiring harness sleeved with a heat shrink tube, and the hot air flow refluxes through the reflux chamber to the outer peripheral surface of the heat shrink tube to firmly connect the heat shrink tube to the wiring harness.

[0021] To achieve the above object, the present invention provides a heat shrink tubing method in a second embodiment, which comprises the following steps:

[0022] The heat shrink tube supplying process is to convey the continuous heat shrink tube formed by arranging and connecting the heat shrink tubes of the same type on a strip-shaped carrier to a predetermined cutting position, and to cut the heat shrink tube from the continuous heat shrink tube at the cutting position by a cutting blade and supply the heat shrink tube;

[0023] The heat shrink tube transfer process uses a fixing rod to transfer the cut heat shrink tube to a predetermined tube insertion position;

[0024] The tube-inserting process includes a tube-inserting process and a tube-prefixing process. The tube-inserting process uses a clamping channel to insert the wire harness into the heat shrinkable tube located at the tube-inserting position. The tube-prefixing process uses a hot air flow to prefix the heat shrinkable tube located at the tube-inserting position on the wire harness.

[0025] The heating and fastening process supplies hot air flow to the outer periphery of the heat shrink tube pre-fixed on the wire harness to fasten the heat shrink tube to the wire harness.

[0026] According to the heat shrink tube sleeve method of the embodiment of the present invention, the heat shrink tube process, the heat shrink tube transfer process, the sleeve process and the heating and fastening process are coordinated to improve the covering quality of the heat shrink tube on the wire terminal, ensure that the tube mouth of the heat shrink tube is flush with the end face of the terminal, and improve the sleeve accuracy of the heat shrink tube.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional diagram of a product manufactured by a fully automatic heat shrink tubing machine according to an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of a fully automatic heat shrink tubing machine according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of another perspective of a fully automatic heat shrink tubing machine according to an embodiment of the present invention;

[0031] Figure 4 is a schematic diagram of a heat shrink tube supply unit according to an embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of a cutting blade in a heat shrink tube supply portion according to an embodiment of the present invention;

[0033] Figure 6 yes Figure 4 A partial enlarged view of

[0034] Figure 7 is a schematic diagram of the cooperation between the heat shrink tube transfer part, the cutting blade and the tube penetration part according to an embodiment of the present invention;

[0035] Figure 8 is a schematic diagram of a heat shrink tube transfer unit according to an embodiment of the present invention;

[0036] Fig. 9 yes Figure 8 A partial enlarged view of

[0037] Fig.10 is a schematic diagram of a pipe-penetrating portion according to an embodiment of the present invention;

[0038] Fig.11 is an exploded view of a pipe-penetrating portion according to an embodiment of the present invention;

[0039] Fig.12 yes Fig.11 A partial enlarged view of

[0040] Fig.13 is a structural diagram of a hot air flow supply unit according to an embodiment of the present invention;

[0041] Fig.14 is an exploded view of a hot air flow supply unit according to an embodiment of the present invention;

[0042] Fig.15 is a schematic diagram of the coordination between the hot air flow supply part and the reflow chamber according to an embodiment of the present invention;

[0043] Description of reference numerals:

[0044] Fully automatic heat shrink tubing machine 1;

[0045] Heat shrink tube supply unit 100, heat shrink tube feeding assembly 101, rounding tube 1011, reel table 1012, tube feeding unit 1013, transmission wheel 10131, cutting blade 102, first blade 1021, first blade 1021a, first blade surface 1021b, second blade 1022, second blade 1022a, second blade surface 1022b, opening and closing driving member 1023;

[0046] The heat shrink tube transfer part 200, the fixing rod 201, the groove 2011, the positioning part 2012, the pointed part 2013, the transfer driving part 202, the rotating unit 2021, and the moving unit 2022;

[0047] Pipe-penetrating portion 300, clamping channel 301, first opening 301a, second opening 301b, through hole 301c, position-limiting unit 301d, first clamping jaw 302, first channel 3021, second clamping jaw 303, second channel 3031, clamping jaw driving member 304, wire clamping mechanism 305, third clamping jaw 3051, fourth clamping jaw 3052, clamping cylinder 3053, moving mechanism 306;

[0048] Hot air flow supply unit 400, heating tube 401, reflux chamber 402, flow regulating mechanism 403, regulating plate 4031, regulating hole 40311, driver 4032, heat preservation chamber 404, fixing member 4041;

[0049] Heat shrink tube 2, tube opening 2a;

[0050] The wiring harness 3 , the terminal 31 , the end surface 31 a , and the electric wire 32 . DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0052] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0053] Next, a fully automatic heat shrink tube sleeve machine and a heat shrink tube sleeve method using the fully automatic heat shrink tube sleeve machine according to the present embodiment will be described with reference to the drawings.

[0054] Product shape:

[0055] First, refer to Figure 1 , describing the shape of the product processed by the fully automatic heat shrink tubing machine involved in this embodiment.

[0056] like Figure 1 As shown, the product includes a heat shrink tube 2 and a wiring harness 3. The wiring harness 3 includes a terminal 31 and a wire 32. The heat shrink tube 2 is sleeved at the connection between the terminal 31 and the wire 32 and is tightly wrapped around the connection. In this product, the end face 31a of the terminal 31 is required to be flush with the tube mouth 2a of the heat shrink tube 2. Therefore, the cut of the heat shrink tube 2 is required to be flat, the sleeve position of the heat shrink tube 2 and the wiring harness 3 is required to be accurate, and the heat shrink tube is required to be evenly heated during heat shrinkage.

[0057] Overview of the fully automatic heat shrink tubing machine

[0058] Reference Figure 2 and Figure 3 , Figure 2 and Figure 3 All of them are structural schematic diagrams of the fully automatic heat shrink tube sleeve machine 1 involved in this embodiment. Among them, the direction of the arrow is the feeding path of the heat shrink tube 2.

[0059] like Figure 2-Figure 14 As shown, the fully automatic heat shrink tube sleeve machine 1 involved in this embodiment generally includes: a heat shrink tube supply part 100, which supplies the heat shrink tube 2 in a predetermined feeding direction; a heat shrink tube transfer part 200, which moves the heat shrink tube 2 supplied by the heat shrink tube supply part 100 to a tube insertion position; a tube insertion part 300, which inserts the wire harness 3 into the heat shrink tube 2 located at the tube insertion position; a hot air flow supply part 400, which supplies a hot air flow to the tube insertion part 300, so that the heat shrink tube 2 is fixedly connected to the wire harness 3 through heat shrinkage.

[0060] In one aspect of the present invention, the present invention provides a fully automatic heat shrink tubing machine 1. According to an embodiment of the present invention, Figure 2 and Figure 3The fully automatic heat shrink tube sleeve machine 1 includes: a heat shrink tube supply part 100, a heat shrink tube transfer part 200, a tube insertion part 300 and a hot air flow supply part 400.

[0061] The heat shrink tube supply unit 100 is suitable for supplying the heat shrink tube 2; the heat shrink tube transfer unit 200 has a fixing rod 201, which is suitable for fixing the heat shrink tube 2 and transferring the heat shrink tube 2 supplied by the heat shrink tube supply unit 100 to a predetermined tube insertion position; the tube insertion unit 300 has a clamping channel 301, a first opening 301a of the clamping channel 301 is for inserting the wire harness, a second opening 301b is for pulling out the fixing rod 201, and a through hole 301c communicating with the outside is provided on the clamping channel 301 , wherein a limiting unit 301d is provided on the second opening 301b to limit the heat shrink tube 2 at the tube insertion position when the fixing rod 201 leaves the clamping channel 301, and the feed harness is inserted into the heat shrink tube 2 at the tube insertion position until the terminal 31 on the harness 3 passes through the second opening 301b, and a hot air flow is supplied into the clamping channel 301 through the through hole 301c to perform a fixed connection between the harness 3 and the heat shrink tube 2; the hot air flow supply part 400 is suitable for supplying a hot air flow to the clamping channel 301.

[0062] In other words, the tube insertion position is in the clamping channel 301, wherein the limiting unit 301d cooperates with the fixing rod 201 to limit the heat shrink tube 2 at the tube insertion position. The setting of the limiting unit 301d and the second opening 301b enables the terminal 31 to pass through the second opening 301b when the wiring harness 3 is inserted into the heat shrink tube 2, and the limiting unit 301d limits the tube opening 2a of the heat shrink tube 2 and the end face 31a of the terminal 31, so that when the tube is inserted, the tube opening 2a of the heat shrink tube 3 and the end face 31a of the terminal 31 are flush. Next, the wiring harness 3 and the heat shrink tube 2 are kept stationary, and a hot air flow is provided into the clamping channel 301, and the hot air flow causes the heat shrink tube 2 to shrink and wrap around the wiring harness 3. Here, the clamping channel 301 positions the heat shrink tube 2 and the wiring harness 3 at the tube insertion position, and combined with the hot air flow heat shrinkage, the sleeve position can be accurately guaranteed.

[0063] Therefore, according to the full-automatic heat shrink tube sleeve machine 1 of the present invention, the heat shrink tube 2 is fixed by the fixing rod 201 and the heat shrink tube 2 is transferred to the predetermined tube insertion position, so that when the fixing rod 201 transfers the heat shrink tube 2 to the tube insertion position, the fixing rod 201 cooperates with the limiting unit 301d of the tube insertion part 300, so that the heat shrink tube 2 can be accurately located at the tube insertion position; and through the limiting unit 301d of the tube insertion part 300, when the wiring harness 3 is inserted into the heat shrink tube 2, the end face 31a of the terminal 31 can be flush with the tube mouth 2a of the heat shrink tube 2; after being flush, the heat shrink tube 2 and the wiring harness 3 remain stationary, and the heat shrink tube 2 is fixed on the wiring harness 3 by supplying hot air flow to the clamping channel 301, thereby ensuring the accurate position of the sleeve of the heat shrink tube 2, improving the covering quality of the heat shrink tube 2 on the wire terminal, ensuring that the tube mouth of the heat shrink tube 2 and the end face of the terminal 31 are flush, and improving the sleeve accuracy of the heat shrink tube 2.

[0064] The heat shrink tube supply unit 100 refers to Figure 4-Figure 6 :

[0065] In some embodiments of the present invention, the heat shrink tube supply unit 100 has a heat shrink tube feeding assembly 101 and a cutting blade 102. The heat shrink tube feeding assembly 101 transmits the continuous heat shrink tube formed by arranging and connecting the heat shrink tubes of the same type on a strip-shaped carrier to a predetermined cutting position. The cutting blade 102 is used to cut and supply the heat shrink tube from the continuous heat shrink tube located at the cutting position. The cutting blade 102 is a scissor structure. Therefore, the cutting blade 102 with a scissor structure can prevent the heat shrink tube 2 from moving with the cutter during the cutting process, and when cutting the heat shrink tube 2, the cut of the heat shrink tube 2 can be guaranteed to be smooth and not cut crooked, thereby ensuring the quality of the heat shrink tube.

[0066] The cutting blade 102 includes a first blade 1021 and a second blade 1022, wherein the blade edge of the first blade 1021 and the blade edge of the second blade 1022 face each other and are staggered to define a shearing cut; the first blade 1021 and the second blade 1022 are connected to an opening and closing driving member 1023 so that the first blade 1021 and the second blade 1022 are driven to open and close by the opening and closing driving member 1023 so that the shearing cut shears the heat shrink tube 2. It can be understood that the two ends of the first blade 1021 and the second blade 1022 distributed in a scissor structure are aggregated, and the other two ends are dispersed, so that the top view of the two blades is in an eight-shaped shape. Then, the first blade 1021a of the first blade 1021 and the second blade 1022a of the second blade 1022 are facing each other and staggered to jointly define a shearing opening, so that when the opening and closing driving member 1023 drives the first blade 1021 and the second blade 1022 to open and close, the first blade 1021 and the second blade 1022 can shear and cooperate to cut off the heat shrink tube.

[0067] Optionally, the first blade 1021 has a first blade surface 1021b tilted upward from the blade edge, and the second blade 1022 has a second blade surface 1022b tilted downward from the blade edge, and the first blade surface 1021b and the second blade surface 1022b have the same inclination angle. In this way, the first blade 1021 and the second blade 1022 can be guided to cut into the heat shrink tube 2 by the tilted blade surfaces, which can further ensure that the heat shrink tube cut is smooth.

[0068] Furthermore, the inclination angles of the first blade surface 1021b and the second blade surface 1022b are both 30°, thereby ensuring that the cut of the heat shrink tube is smooth after being sheared.

[0069] Optionally, the opening and closing driving member 1023 is a clamping cylinder, and the two clamping claws of the clamping claw cylinder are connected to the first blade 1021 and the second blade 1022 in a one-to-one correspondence. The backs of the first blade 1021 and the second blade 1022 are respectively fixed on two blade seats, and the two blade seats are further connected to the two clamping claws in a one-to-one correspondence, so that the clamping claw cylinder can drive the first blade 1021 and the second blade 1022 to open and close to shear the heat shrink tube.

[0070] In some embodiments of the present invention, the heat shrink tube feeding assembly 101 includes a rounding tube 1011, the inner diameter of which is equal to the outer diameter of the heat shrink tube, and the rounding tube 1011 is vertically arranged and perpendicular to the shearing cut. In other words, the rounding tube 1011 is arranged above the shearing cut, and the rounding tube 1011 can round the flat or curved heat shrink tube through its inner tube, thereby further ensuring that the heat shrink tube 2 will not be cut crookedly and ensuring that the cut of the heat shrink tube 2 is smooth. In addition, by setting the rounding tube 1011, the heat shrink tube 2 can be cut vertically by the blade.

[0071] Optionally, the entrance of the roundness correction tube 1011 is a trumpet guide port, thereby guiding the heat shrink tube 2 into the roundness correction tube 1011 to improve the roundness correction efficiency.

[0072] Optionally, the heat shrink tube feeding assembly 101 also includes a reel 1012 and a tube delivery unit 1013. The reel 1012 can rotatably hold the rolled heat shrink tube. The tube delivery unit 1013 is suitable for delivering the rolled continuous heat shrink tube to the shearing opening for shearing. Among them, the tube delivery unit 1013 includes a plurality of transmission wheel groups suitable for clamping and transmitting the heat shrink tube to the rounding tube 1011, and each transmission wheel group includes two transmission wheels 10131 that are arranged oppositely and turn in opposite directions. Thus, the heat shrink tube can be automatically transmitted by clamping the heat shrink tube during rotation by the two transmission wheels 10131. In addition, the heat shrink tube can be vertically transmitted by arranging the position of the transmission wheel group. Among them, the rotation of the two transmission wheels 10131 can be driven by a motor, a gear and a synchronous belt, and the clamping action of the two transmission wheels 10131 can be driven by a cylinder to drive one of the transmission wheels 10131 to move close to the other transmission wheel.

[0073] Optionally, a rounding tube 1011 may be provided in the tube delivery unit 1013 to calibrate the heat shrink tube.

[0074] Heat shrink tube transfer unit 200 Figure 7-Figure 8 :

[0075] In some embodiments of the present invention, the fixing rod 201 is provided with a plurality of grooves 2011 which are concave in the radial direction of the fixing rod 201, and the plurality of grooves 2011 are distributed circumferentially on the outer circumference of the fixing rod 201, so that the outer circumference of the fixing rod 201 is configured with a positioning portion 2012 for abutting against the inner wall of the heat shrink tube 2. In other words, the fixing rod 201 is provided with the grooves 2011, so that the outer circumference of the fixing rod 201 is uneven along its circumference and has a concave-convex drop; and the positioning portion 2012 has the curvature of the fixing rod 201 itself. In this way, when the fixing rod 201 is inserted into the heat shrink tube 2, the outer circumferential surface of the fixing rod 201 except the groove 2011 will abut the inner wall of the heat shrink tube 2, and can prevent the heat shrink tube 2 from moving or rotating on the fixing rod 201, thereby ensuring the stability of the position of the heat shrink tube 2 on the fixing rod 201, and further ensuring the stability of the position of the heat shrink tube 2 when it is cut off; at the same time, when the heat shrink tube 2 is in the tube insertion position, due to the curved surface on the positioning portion 2012, the limiting unit 301d can smoothly separate the heat shrink tube 2 from the fixing rod 201. Therefore, the heat shrink tube 2 can be inserted into and fixed by the fixing rod 201, and the heat shrink tube 2 can be positioned by the positioning portion 2012 on the fixing rod 201, so that the position of the heat shrink tube 2 on the fixing rod 201 is stable. In this way, when the fixing rod 201 is inserted into the heat shrink tube 2, the cutting blade 102 can accurately cut the heat shrink tube 2 to ensure that the heat shrink tube 2 is not cut crookedly; when the fixing rod 201 moves the heat shrink tube 2 to the tube insertion position, the fixing rod 201 cooperates with the limiting unit 301d to enable the heat shrink tube 2 to be accurately located at the tube insertion position, thereby ensuring that the sleeve position of the heat shrink tube 2 is accurate.

[0076] Optionally, the number of the grooves 2011 is four, and the four grooves 2011 are evenly distributed at intervals in the circumferential direction on the outer circumferential surface of the fixing rod 201. Thus, the fixing rod 201 can stably position the heat shrink tube 2.

[0077] Furthermore, the cross section of the fixing rod 201 is in a "+" shape. That is, the groove 2011 is in a V shape. The cross section of the fixing rod 201 is set to be in a "+" shape, which can meet the positioning of the positioning portion 2012 on the heat shrink tube 2 and cooperate with the use of the limiting unit 301d.

[0078] In addition, combined Figure 8 One end of the fixing rod 201 has a pointed portion 2013 for guiding the fixing rod 201 to be inserted into the heat shrink tube 2. The pointed portion 2013 allows the fixing rod 201 to be quickly inserted into the heat shrink tube 2, thereby improving the efficiency of transferring the heat shrink tube 2.

[0079] Combination Figure 6 and Figure 7The heat shrink tube transfer part 200 also includes a transfer drive 202, and the transfer drive 202 includes a rotating unit 2021 and a moving unit 2022. The moving end of the moving unit 2022 is connected to the fixed rod 201 to drive the fixed rod 201 to move, and the rotating unit 2021 is connected to the moving unit 2022 to drive the moving unit 2022 to rotate and drive the fixed rod 201 to rotate. In other words, the shearing opening and the pipe-threading position are arranged vertically, so that the heat shrink tube 2 can be transferred from the shearing opening to the pipe-threading position through the cooperation of the rotating unit 2021 and the moving unit 2022. Therefore, according to the cooperation of the fixed rod 201 and the transfer drive 202 of the heat shrink tube transfer part 200, the positions of the shearing opening and the pipe-threading part 300 can be reasonably adjusted.

[0080] Optionally, the rotating unit 2021 is a swing cylinder, the moving unit 2022 is an air cylinder, the cylinder body of the air cylinder is fixed on the power output shaft of the swing cylinder, and the piston rod of the air cylinder is connected to the fixed rod 201. Through the cooperation of the high-precision swing cylinder and the air cylinder, the position stability of the heat shrink tube 2 on the fixed rod 201 can be further ensured.

[0081] The pipe-through portion 300 is shown in FIG. Figure 10-12 :

[0082] In some embodiments of the present invention, the clamping channel 301 can be switched between an open state and a closed state to receive the heat shrink tube 2; the inner wall surface of the clamping channel 301 is provided with a step protruding radially inward at the second opening 301b to construct a limiting unit 301d, and when the fixing rod 201 leaves the clamping channel 301, the limiting unit 301d blocks the heat shrink tube 2 so that the heat shrink tube 2 is separated from the fixing rod 201 and is limited in the tube insertion position. When the wiring harness 3 is inserted into the heat shrink tube 2, the setting of the limiting unit 301d and the second opening 301b allows the terminal 31 to pass through the second opening 301b, and the limiting unit 301d limits the tube mouth 2a of the heat shrink tube 2 and the end face 31a of the terminal 31, so that the tube mouth 2a of the heat shrink tube 3 and the end face 31a of the terminal 31 are flush.

[0083] Optionally, the clamping channel 301 is constructed by two clamping jaws of the tube clamping mechanism. Specifically, the tube clamping mechanism includes a first clamping jaw 302, a second clamping jaw 303 and a clamping jaw driving member 304, wherein the clamping jaw driving member 304 can be a clamping jaw cylinder for easy clamping. A first channel 3021 is formed in the first clamping jaw 302, and the first channel 3021 radially protrudes to form a first step; a second channel 3031 corresponding to the first channel 3021 is formed in the second clamping jaw 303, and the second channel 3031 radially protrudes to form a second step corresponding to the first step; the first channel 3021 and the second channel 3031 are close to each other to form the clamping channel 301, and the first step and the second step are close to each other to form a limiting unit 301d; the clamping jaw driving member 304 drives the first clamping jaw 302 and the second clamping jaw 303 to approach each other or move away from each other. Thus, the clamping channel 301 is switched between an open state and a closed state by driving the first clamping jaw 302 and the second clamping jaw 303 to open and close through the clamping jaw driving member 304, thereby opening to receive the heat shrinkable tube 2 and closing to cooperate with the limiting unit 301d to separate the heat shrinkable tube 2 from the fixing rod 201.

[0084] Optionally, the tube-threading portion 300 further includes a wire clamping mechanism 305, which is used to clamp the wire harness 3. Specifically, the wire clamping mechanism 305 includes a third clamping jaw 3051, a fourth clamping jaw 3052 and a clamping cylinder 3053, wherein the third clamping jaw 3051 and the fourth clamping jaw 3052 are respectively arranged on the movable ends of the clamping cylinder 3053, the third clamping jaw 3051 and the fourth clamping jaw 3052 are close to each other to clamp the wire harness 3, and the clamping cylinder 3053 drives the third clamping jaw 3051 and the fourth clamping jaw 3052 to approach each other or move away from each other. Among them, claws are respectively arranged on the third clamping jaw 3051 and the fourth clamping jaw 3052 to prevent the wire harness from falling off. When the wire harness 3 needs to be clamped, the clamping cylinder 3053 drives the third clamping jaw 3051 and the fourth clamping jaw 3052 to approach each other to clamp the wire harness 3, and the claws effectively prevent the wire harness 3 from falling off.

[0085] Optionally, a guide port is also provided on the first opening 301a of the clamping channel 301 to facilitate the insertion of the wiring harness 3. When the wiring harness 3 is inserted into the clamping channel 301, the terminal is not facing the clamping channel 301. At this time, the terminal can be inserted into the clamping channel 301 along the side wall of the guide port.

[0086] Optionally, the through hole 301 d on the clamping channel 301 is radially arranged at the top of the clamping channel 301 .

[0087] In addition, the tube-piercing portion 300 further includes a moving mechanism 306, which can drive the clamping channel 301 to move between the second position and the third position. Specifically, the moving mechanism 306 can include an adjustable stroke cylinder, a slide rail and a slider, and the adjustable stroke cylinder drives the slider to move on the slide rail, and the slider drives the clamping channel 301 to move between the second position and the third position. Among them, in the second position, the through hole 301d of the clamping channel 301 can correspond to the hot air flow supply portion 400, so that the hot air flow supply portion 400 supplies hot air flow into the clamping channel 301; in the third position, the clamping channel 301 avoids the hot air flow supply portion 400.

[0088] The hot air flow supply unit 400 refers to Figure 13-Figure 15 :

[0089] In some embodiments of the present invention, the hot air flow supply unit 400 includes a heating tube 401, one end of which is connected to the air source supply unit, and the other end of which is toward the second position. When the clamping channel 301 is located at the second position, the heating tube 401 supplies hot air flow to the clamping channel 301 through the through hole 301d, so that the heat shrinkable tube 2 is heat-shrunk and fixed on the wiring harness 3. The cooperation between the heating tube 401, the through hole 301d and the clamping channel 301 can directly use the hot air flow to fasten the heat shrinkable tube 2 to the wiring harness 3.

[0090] Of course, in order to ensure that the outer peripheral surface of the heat shrink tube 2 is heated evenly and the coating quality is better. The hot air flow supply part 400 can also be provided with a reflux chamber 402, and the reflux chamber 402 is movable between a first position and a second position. The aforementioned cooperation of the heating tube 401 with the through hole 301d and the clamping channel 301 can be to pre-position the heat shrink tube 2 on the wiring harness 3. Then, the clamping channel 301 is moved to the third position, and the reflux chamber 402 is moved to the second position, so that the heating tube 401 supplies hot air flow toward the heat shrink tube 2 on the wiring harness 3, and the hot air flow will flow back to the outer peripheral surface of the heat shrink tube 2 through the reflux chamber 402, so that the heat shrink tube 2 shrinks evenly and is tightly coated on the wiring harness 3. In this way, the accuracy of the sleeve between the heat shrink tube 2 and the wiring harness 3 can be further guaranteed.

[0091] Optionally, the reflow chamber 402 is a groove with an open top, and the inner wall surface of the groove can make the hot air flow reflow upward.

[0092] Furthermore, the groove of the reflux chamber 402 is in a cone shape, thereby improving the reflux effect of the hot air flow.

[0093] Optionally, an air flow channel for air flow is provided in the heating tube 401. The hot air flow supply unit 400 further includes a flow regulating mechanism 403, which includes an adjusting plate 4031 and a driver 4032. The movable end of the driver 4032 is connected to the adjusting plate 4031 and drives it to move. The adjusting plate 4031 is movably provided on the air outlet of the heating tube 301 to fully or partially cover the air outlet.

[0094] During heating, first the driver 4032 drives the adjustment plate 4031 to completely cover the air outlet to close the air flow channel on the heating tube 401, and then the heating tube 401 starts to heat. Since there is less air in the air flow channel, the air can be heated quickly. After the air is heated, the driver 4032 drives the adjustment plate 4031 to partially cover or not cover the air outlet to control the outflow of hot air, thereby facilitating the heating of the heat shrink tube 2. Therefore, the hot air flow supply unit 400 can quickly heat the air and facilitate the control of the outflow of hot air, thereby improving production efficiency.

[0095] Optionally, a heat preservation chamber 404 is further included, in which a heating tube 401 is installed, so that the heat emitted by the heating tube 401 is not easily taken away by the outside air, thereby improving the heating effect of the heating tube 401.

[0096] Optionally, the driver 4032 is arranged on one side of the insulation chamber 404, and the movable end of the driver 4032 extends into the insulation chamber 404 and is connected to the adjustment plate 4031, wherein the driver 4032 can be a cylinder, and the movable end of the cylinder extends into the insulation chamber 404 and is connected to the adjustment plate 4031, so as to drive the adjustment plate 4031 to move.

[0097] Optionally, an adjustment hole 40311 is provided on the adjustment plate 4031, and the adjustment hole 40311 corresponds to the air outlet. The adjustment plate 4031 is moved to adjust the overlap between the adjustment hole 40311 and the air outlet. The greater the overlap between the adjustment hole 40311 and the air outlet, the greater the hot air outflow. The smaller the overlap between the adjustment hole 40311 and the air outlet, the smaller the hot air outflow. This facilitates the adjustment of the airflow output to improve production efficiency.

[0098] Optionally, a fixing member 4041 is provided in the heat preservation chamber 404, and the heating tube 401 passes through the fixing member 4041 and is fixed in the heat preservation chamber 404, wherein the fixing member 4041 may include a first fixing member and a second fixing member, the first fixing member is radially recessed inward to form a groove, and the second fixing member is provided in the groove to fix the heating tube 401. The first fixing member and the second fixing member can cooperate to effectively fix the heating tube 401 and prevent the heating tube 401 from shaking.

[0099] In addition, the method for performing heat shrink tubing by using the above-mentioned fully automatic heat shrink tubing machine 1 includes the following steps:

[0100] In the heat shrink tube supply process, a continuous heat shrink tube formed by arranging and connecting the same type of heat shrink tubes on a strip carrier is conveyed to a predetermined cutting position, and the heat shrink tube is cut and supplied from the continuous heat shrink tube located at the cutting position by a cutting blade. In this process, the heat shrink tube is conveyed from the reel table 1012 to the shearing opening of the cutting blade 102 via the tube feeding unit 1013.

[0101] The heat shrink tube transfer process uses the fixed rod 201 to transfer the cut heat shrink tube to the predetermined tube insertion position; in this process, the fixed rod 201 is first inserted into the heat shrink tube 2 at the shear cut, and the cutting blade 102 then cuts off the connected heat shrink tube at the cutting position, and then the transfer drive 202 drives the fixed rod 201 to transfer the heat shrink tube to the clamping channel 301.

[0102] The tube-inserting process includes a tube-inserting process and a tube-prefixing process. The tube-inserting process uses the clamping channel 301 to insert the wire harness 3 into the heat shrink tube 2 located at the tube-inserting position. The tube-prefixing process uses hot air flow to prefix the heat shrink tube 2 located at the tube-inserting position on the wire harness 3. In this process, the clamping channel 301 opens to receive the fixing rod 201 fixed with the heat shrink tube 2, and then closes. The fixing rod 201 is driven by the transfer drive 202 to be pulled out from the second opening 301b of the clamping channel 301. The limiting unit 301d prevents the heat shrink tube 2 from being taken out, so that the heat shrink tube 2 is limited at the tube-inserting position. Then, the hot air flow supply unit 400 supplies hot air flow to the clamping channel 301 through the through hole 301c, so that the heat shrink tube 2 is prefixed on the wire harness 3.

[0103] The heating and fastening process supplies hot air flow to the periphery of the heat shrink tube pre-fixed on the wiring harness to fasten the heat shrink tube to the wiring harness. In this process, the reflux chamber 402 is located at the second position and cooperates with the heating tube 401 to provide uniform hot air flow to the outer peripheral surface of the heat shrink tube 2.

[0104] Therefore, according to the heat shrink tube sleeve method of the embodiment of the present invention, the heat shrink tube process, the heat shrink tube transfer process, the sleeve process and the heating and fastening process are coordinated to improve the covering quality of the heat shrink tube on the wire terminal, ensure that the tube mouth of the heat shrink tube is flush with the end face of the terminal, and improve the sleeve accuracy of the heat shrink tube.

[0105] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0106] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0107] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0108] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0110] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fully automatic heat shrink tubing machine, characterized in that: include: Heat shrink tube supply unit, heat shrink tube transfer unit, tube threading unit and hot air flow supply unit; The heat shrink tube supply part is suitable for supplying heat shrink tubes; The heat shrink tube transfer unit has a fixing rod, and the fixing rod is suitable for fixing the heat shrink tube and transferring the heat shrink tube supplied by the heat shrink tube supply unit to a predetermined tube insertion position; The tube-penetrating portion has a clamping channel, a first opening of the clamping channel is for inserting the wire harness, a second opening is for pulling out the fixing rod, and a through hole communicating with the outside is provided on the clamping channel, wherein a limiting unit is provided on the second opening to limit the heat shrink tube at the tube-penetrating position when the fixing rod leaves the clamping channel, the feeding wire harness is inserted into the heat shrink tube at the tube-penetrating position until the terminal on the wire harness passes through the second opening, and a hot air flow is supplied into the clamping channel through the through hole to perform a fixed connection between the wire harness and the heat shrink tube; The hot air flow supply part comprises a heating tube, one end of which is connected to the air source supply part, and the other end of which is suitable for supplying the hot air flow to the clamping channel through the through hole.

2. The fully automatic heat shrink tubing machine according to claim 1, characterized in that: The heat shrink tube supply unit includes a heat shrink tube feeding assembly and a cutting blade. The heat shrink tube feeding assembly transmits a continuous heat shrink tube formed by arranging and connecting heat shrink tubes of the same type on a strip-shaped carrier to a predetermined cutting position. The cutting blade is used to cut and supply the heat shrink tube from the continuous heat shrink tube located at the cutting position. The cutting blade has a scissors structure.

3. The fully automatic heat shrink tubing machine according to claim 2, characterized in that: The cutting blade includes a first blade and a second blade, wherein the blade edge of the first blade faces the blade edge of the second blade and is staggered to jointly define a shearing opening; the first blade and the second blade are connected to an opening and closing driving member so that the first blade and the second blade are driven to open and close by the opening and closing driving member so that the shearing opening shears the heat shrink tube.

4. The fully automatic heat shrink tubing machine according to claim 3, characterized in that: The heat shrink tube supply part includes a rounding tube, the inner diameter of the rounding tube is equal to the outer diameter of the heat shrink tube, and the rounding tube is vertically arranged and perpendicular to the shear cut.

5. The fully automatic heat shrink tubing machine according to claim 1, characterized in that: The fixing rod is provided with a plurality of grooves which are concave inwardly along the radial direction of the fixing rod. The plurality of grooves are circumferentially distributed on the outer circumference of the fixing rod so that the outer circumference of the fixing rod forms a positioning portion for abutting against the inner wall of the heat shrink tube.

6. The fully automatic heat shrink tubing machine according to claim 1 or 5, characterized in that: The cross section of the fixing rod is in the shape of a "+".

7. The fully automatic heat shrink tubing machine according to claim 1 or 5, characterized in that: The heat shrink tube transfer part includes a transfer drive member, which has a rotating unit and a moving unit. The moving end of the moving unit is connected to the fixed rod to drive the fixed rod to move, and the rotating unit is connected to the moving unit to drive the mobile unit to rotate and drive the fixed rod to rotate.

8. The fully automatic heat shrink tubing machine according to claim 1, characterized in that: The clamping channel can be switched between an open state and a closed state to receive the heat shrink tube; the inner wall surface of the clamping channel is provided with a step protruding radially inward at the second opening to construct the limiting unit, and when the fixing rod leaves the clamping channel, the limiting unit blocks the heat shrink tube so that the heat shrink tube is separated from the fixing rod and limited to the tube insertion position.

9. The fully automatic heat shrink tubing machine according to claim 1, characterized in that: It also includes a reflux chamber movably arranged between a first position and a second position, and the top of the reflux chamber is open; the clamping channel is movable between the second position and a third position; the other end of the heating tube faces the second position, and when the clamping channel is located at the second position, the heating tube supplies a hot air flow to the clamping channel through the through hole; when the reflux chamber is located at the second position, the heating tube supplies a hot air flow to the wiring harness sleeved with a heat shrink tube, and the hot air flow refluxes to the outer peripheral surface of the heat shrink tube through the reflux chamber to firmly connect the heat shrink tube to the wiring harness.

10. A method for heat shrink tubing using the fully automatic heat shrink tubing machine according to claim 1, characterized in that: The following steps are included: The heat shrink tube supplying process is to convey the continuous heat shrink tube formed by arranging and connecting the heat shrink tubes of the same type on a strip-shaped carrier to a predetermined cutting position, and to cut the heat shrink tube from the continuous heat shrink tube at the cutting position by a cutting blade and supply the heat shrink tube; The heat shrink tube transfer process uses a fixing rod to transfer the cut heat shrink tube to a predetermined tube insertion position; The tube-inserting process includes a tube-inserting process and a tube-prefixing process. The tube-inserting process uses a clamping channel to insert the wire harness into the heat shrinkable tube located at the tube-inserting position. The tube-prefixing process uses a hot air flow to prefix the heat shrinkable tube located at the tube-inserting position on the wire harness. The heating and fastening process supplies hot air flow to the outer periphery of the heat shrink tube pre-fixed on the wire harness to fasten the heat shrink tube to the wire harness.

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