A reinforcing steel bar heat shrink sleeve processing device and method

Abstract

The application relates to the technical field of steel bar processing equipment, and discloses a steel bar heat-shrinkable sleeve processing device and a processing method, which comprise a base, the base is provided with an expansion die, a transfer rod and a moving seat; the expansion die comprises a lower die and an upper die, the top of the upper die and the bottom of the lower die are both provided with adsorption surfaces, and negative pressure channels are arranged in the upper die and the lower die; the top of the lower die is further provided with a limiting plate; the base is provided with a guide rail, the moving seat is guided and assembled on the guide rail, the moving seat is used for clamping and fixing the transfer rod, and the moving seat has an initial state that the transfer rod is located outside the expansion die and a working state that the transfer rod is inserted into the heat-shrinkable sleeve to expand the heat-shrinkable sleeve in a moving stroke. The negative pressure mechanism generates negative pressure on the adsorption surfaces of the upper die and the lower die through the negative pressure channels, can fix the flat heat-shrinkable sleeve, and ensures the processing efficiency of the heat-shrinkable sleeve by fixing the heat-shrinkable sleeve through the adsorption surfaces of the upper die and the lower die during the expansion process, so that the heat-shrinkable sleeve is prevented from stretching and contracting.

Description

Technical Field

[0001] This invention relates to the field of steel bar processing equipment technology, and in particular to a steel bar heat shrink sleeve processing device and processing method. Background Technology

[0002] Power cables have been used for over a century. There are many types of cables, and their applications are wide-ranging, involving industries such as power, construction, communications, and manufacturing. They are essential basic equipment for transmitting electrical energy, transmitting information, and manufacturing various motors, instruments, and meters to realize electromagnetic energy conversion. They are necessary basic products in the future electrified and information-based society and are common tools in modern industrial production and daily life.

[0003] The power cable industry has developed rapidly. Cable processing includes steps such as stripping, bending, threading, heat shrinking, and pipe clamp assembly. Nowadays, most cables are processed using automated production lines. For example, patent CN109462109B discloses a CNC machine tool and cable assembly method for assembling cables, including an operating table, a cable stripping unit, a piercing clamp unit, a steel strand cutting and bending unit, and a cable heat shrinking and crimping unit, enabling assembly line processing of cables.

[0004] The cable heat shrinking and crimping unit is mainly used to fit heat shrink tubing onto one end of the cable. Heating causes the heat shrink tubing to shrink radially, sealing and insulating the terminals and cable. Heat shrink tubing is typically stored wound on a feeding tray, with the tubing coiled together in a disc shape. As the tray rotates, a pulling and cutting device cuts the tubing to the required length before it is fitted onto the cable. The heat shrink tubing is flat when coiled, and after being cut to the required length, the tubing walls are tightly packed together. It needs to be expanded into a circle before assembly. However, current heat shrink tubing expansion technologies typically use a robotic arm clamping method with mandrel insertion. During mandrel insertion, the heat shrink tubing is prone to expansion and contraction, affecting processing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a steel bar heat shrink tubing processing device to solve the problem that the expansion of heat shrink tubing using a robotic arm clamping and core rod insertion method in the prior art affects processing efficiency; this invention also provides a steel bar heat shrink tubing processing method.

[0006] To achieve the above objectives, the present invention provides a steel bar heat shrink tubing processing device, including a base, on which an expansion mold, a transfer bar and a movable seat are provided;

[0007] The expansion mold includes a lower mold disposed on the base and an upper mold arranged opposite to the lower mold. The upper mold can move up and down. The top of the upper mold and the bottom of the lower mold are both provided with adsorption surfaces for adsorbing heat shrink tubing. Both the upper mold and the lower mold are provided with negative pressure channels for connecting the adsorption surfaces to an external negative pressure mechanism.

[0008] The top of the lower mold is also provided with a limiting plate for limiting the heat shrink tubing. There are two sets of limiting plates. The two sets of limiting plates are located on both sides of the adsorption surface and extend along the axial direction of the heat shrink tubing. A placement space for placing the heat shrink tubing to be expanded is formed between the two sets of limiting plates. The limiting plate is provided with a limiting structure for blocking and limiting the outer wall of the heat shrink tubing.

[0009] The base is provided with a guide rail extending along the axial direction of the heat shrink tubing. The movable seat is guided and assembled on the guide rail. The movable seat is used to clamp and fix the transfer rod. During the movement stroke, the movable seat has an initial state in which the transfer rod is located outside the expansion mold and a working state in which the transfer rod is inserted into the heat shrink tubing to expand the heat shrink tubing.

[0010] Preferably, the limiting plate includes a base plate fixedly connected to the lower mold and a flange disposed on the top of the base plate. The flanges of the two sets of limiting plates are arranged close to each other. The limiting structure includes the flanges, and the space between the two sets of base plates forms the placement space.

[0011] Preferably, the base plate is provided with fixing holes for mounting fixing bolts connected to the lower mold, and the fixing holes are elongated holes extending along the axial direction perpendicular to the heat shrink tubing.

[0012] Preferably, the upper mold includes a fixing member and an adsorption member disposed at the bottom of the fixing member. The adsorption member is detachably connected to the fixing member. The side of the adsorption member is an inclined surface that tapers from both sides to the middle. The bottom surface of the adsorption member forms the adsorption surface.

[0013] Preferably, the negative pressure channel includes a main channel and a plurality of branch channels connected to the main channel. The branch channels are arranged at intervals along the axial direction of the heat shrink tubing, and each branch channel is perpendicular to the adsorption surface. The main channel is used to connect to the negative pressure mechanism.

[0014] Preferably, the movable seat includes a support plate, a pressure block vertically movably arranged on the upper side of the support plate, and a vertical drive member arranged on the support plate. The top of the support plate is provided with a support groove for supporting the transfer rod, and the vertical drive member is used to drive the pressure block to move vertically to press or release the transfer rod.

[0015] Preferably, the support groove is a V-shaped groove, the vertical drive component is a vertical cylinder, and the top end of the piston rod of the vertical cylinder is fixedly connected to the pressure block.

[0016] Preferably, the movable seat further includes a rotary table that can rotate about a vertical center line, the support plate is fixedly assembled on the top of the rotary table, and the rotary table is guided and assembled with the guide rail.

[0017] Preferably, the base is provided with a horizontal cylinder arranged along the axial direction of the heat shrink tubing, and the horizontal cylinder is throttle-connected to the movable seat.

[0018] The present invention also provides a method for processing heat-shrinkable tubing for reinforcing bars, using the heat-shrinkable tubing processing device for reinforcing bars described in any of the above technical solutions, comprising the following steps:

[0019] S1, the flat heat shrink tubing after being cut is placed between the upper and lower molds of the expansion mold. The upper mold moves downward and closes with the lower mold. The negative pressure mechanism generates an adsorption force on the adsorption surface of the upper and lower molds through the negative pressure channel, and the heat shrink tubing is adsorbed and fixed.

[0020] S2, the upper mold moves upward, causing the upper wall of the heat shrink tubing to move upward. Under the limiting structure of the limiting plate, the heat shrink tubing expands, forming an opening at the end near the transfer bar.

[0021] S3, the movable seat moves to the working state on the guide rail of the base, the transfer rod is axially inserted into the heat shrink tubing, the heat shrink tubing is expanded into a circle, and the heat shrink tubing is fitted onto the transfer rod;

[0022] S4, the moving seat moves to the initial state, the transfer bar drives the heat shrink tubing out of the expansion mold, and the external robot arm transfers the transfer bar and the heat shrink tubing on it to the next station.

[0023] Preferably, the method further includes the step of adjusting the spacing between the limiting plates, adjusting the spacing between the two sets of limiting plates according to the required expanded diameter of the heat shrink tubing.

[0024] Preferably, in step S4, after the movable seat moves to the initial state, the robot grips the transfer bar, the vertical drive drives the pressure block to move upward and release the transfer bar, and the robot transfers the transfer bar and heat shrink tubing to the next station.

[0025] Preferably, in step S4, after the movable seat moves to the initial state, the rotary table drives the support plate to rotate 90 degrees to 180 degrees, and the robot arm then grips the transfer bar.

[0026] Compared with the prior art, the processing device and method for heat shrink tubing of steel bars according to the present invention have the following advantages: the negative pressure channels on the upper and lower molds of the expansion mold can be connected to an external negative pressure mechanism. The negative pressure mechanism generates negative pressure on the adsorption surfaces of the upper and lower molds through the negative pressure channels, which can fix the flat heat shrink tubing. When the upper mold moves vertically, it can drive the upper wall and lower wall of the heat shrink tubing to separate. Under the action of the limiting structure, the end of the heat shrink tubing forms an opening. When the moving seat moves to the working state on the guide rail, it can drive the transfer rod to insert into the heat shrink tubing, expanding the heat shrink tubing into a circle. During the expansion process, the adsorption surfaces of the upper and lower molds always fix the heat shrink tubing, avoiding the expansion and contraction of the heat shrink tubing and ensuring the processing efficiency of the heat shrink tubing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the steel bar heat shrink tubing processing device of the present invention;

[0028] Figure 2 yes Figure 1 A structural schematic diagram of a steel bar heat shrink tubing processing device from another perspective;

[0029] Figure 3 yes Figure 2 A partially enlarged schematic diagram of point A in the steel bar heat shrink tubing processing device;

[0030] Figure 4 yes Figure 3 A cross-sectional view of the expansion mold of the steel bar heat shrink tubing processing device along the axial direction of the heat shrink tubing.

[0031] In the diagram, 1. Base, 11. Guide rail, 2. Expansion mold, 21. Upper mold, 211. Fixing component, 212. Adsorption component, 22. Lower mold, 23. Support leg, 24. Adsorption surface, 25. Negative pressure channel, 251. Main channel, 252. Branch channel, 26. Drive cylinder, 3. Transfer rod, 4. Moving seat, 41. Support plate, 42. Pressure block, 43. Vertical cylinder, 44. Support groove, 45. Rotary table, 5. Limiting plate, 51. Base plate, 52. Flange, 53. Fixing hole, 6. Horizontal cylinder, 7. Heat shrink tubing. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] A preferred embodiment of the steel bar heat shrink tubing processing device of the present invention, such as... Figures 1 to 4 As shown, the steel bar heat shrink tubing processing device includes a base 1, an expansion mold 2, a central transfer bar 3, and a movable seat 4. The base 1 is a plate-shaped structure, and the expansion mold 2, the central transfer bar 3, and the movable seat 4 are all arranged on the base 1.

[0034] The expansion mold 2 includes a lower mold 22 and an upper mold 21 arranged separately. The lower mold 22 is supported on the base 1, and the upper mold 21 is arranged opposite to the lower mold 22 and can move up and down. In this embodiment, four support legs 23 are fixedly connected to the bottom of the lower mold 22. The support legs 23 are fixedly assembled to the base plate 51 by bolts, and the lower mold 22 is fixedly connected to the support legs 23 by bolts. A drive cylinder 26 is fixedly assembled on the lower mold 22. The piston rod of the drive cylinder 26 is fixedly connected to the upper mold 21 to drive the upper mold 21 to move up and down.

[0035] Both the top of the upper mold 21 and the bottom of the lower mold 22 are provided with adsorption surfaces 24, which are used to adsorb the heat shrink tubing 7. Negative pressure channels 25 are also provided inside both the upper mold 21 and the lower mold 22, which are used to connect the adsorption surfaces 24 to an external negative pressure mechanism. The negative pressure mechanism generates negative pressure on the adsorption surfaces 24 through the negative pressure channels 25. When the flat heat shrink tubing 7 is arranged between the upper mold 21 and the lower mold 22, the adsorption surfaces 24 can adsorb and fix the heat shrink tubing 7, preventing it from moving.

[0036] The top of the upper mold 21 is also provided with a limiting plate 5, which is used to limit the heat shrink tubing 7 and limit the maximum deformation size of the heat shrink tubing 7. There are two sets of limiting plates 5, which are symmetrically arranged on both sides of the adsorption surface 24 and extend along the axial direction of the heat shrink tubing 7, thus limiting the radial dimension of the heat shrink tubing 7 after expansion.

[0037] There is a gap between the two sets of limiting plates 5, which forms a placement space for placing the heat shrink tubing 7 to be expanded. After the heat shrink tubing 7 to be expanded is placed in the placement space between the two sets of limiting plates 5, the adsorption surfaces 24 of the upper mold 21 and the lower mold 22 adsorb and fix the heat shrink tubing 7 to prevent it from moving. The limiting plates 5 are provided with limiting structures, which are used to stop and limit the outer wall of the heat shrink tubing 7, thereby limiting the horizontal dimension of the heat shrink tubing 7 after expansion, so as to ensure that the heat shrink tubing 7 opens vertically and allows the transfer rod 3 to be inserted.

[0038] The base 1 is also equipped with a guide rail 11, which extends axially along the heat shrink tubing 7. The movable seat 4 is guided and mounted on the guide rail 11. The movable seat 4 is used to clamp and fix the transfer rod 3. The movable seat 4 can drive the transfer rod 3 to move on the guide rail 11 to adjust the position of the transfer rod 3. The movable seat 4 is also equipped with a clamping mechanism that can clamp or release the transfer rod 3. When released, it can be transferred to the next work station by an external robot arm.

[0039] The end of the transfer rod 3 facing the expansion mold 2 is tapered to facilitate insertion into the heat shrink tubing 7 with an open end. The moving seat 4 has an initial state and a working state during its movement on the guide rail 11. When the moving seat 4 moves to the initial state, the transfer rod 3 is located outside the expansion mold 2; when the moving seat 4 moves to the working state, the transfer rod 3 is axially inserted into the heat shrink tubing 7, and the heat shrink tubing 7 is opened by the transfer rod 3 to complete the expansion work.

[0040] When processing heat shrink tubing 7 using this steel rebar heat shrink tubing processing device, the negative pressure channel 25 on the upper mold 21 and lower mold 22 of the expansion mold 2 can be connected to the external negative pressure mechanism. The negative pressure mechanism generates negative pressure on the adsorption surface 24 of the upper mold 21 and lower mold 22 through the negative pressure channel 25, which can fix the flat heat shrink tubing 7. When the upper mold 21 moves vertically, it can drive the upper wall and lower wall of the heat shrink tubing 7 to separate. Under the action of the limiting structure, the end of the heat shrink tubing 7 forms an opening. When the moving seat 4 moves to the working state on the guide rail 11, it can drive the central transfer rod 3 to be inserted into the heat shrink tubing 7, expanding the heat shrink tubing 7 into a circle. During the expansion process, the adsorption surface 24 of the upper mold 21 and lower mold 22 always fixes the heat shrink tubing 7, preventing the heat shrink tubing 7 from expanding and contracting, thus ensuring the processing efficiency of the heat shrink tubing 7.

[0041] Preferably, the limiting plate 5 includes a base plate 51 fixedly connected to the lower mold 22 and a flange 52 disposed on the top of the base plate 51. The flanges 52 of the two sets of limiting plates 5 are arranged close to each other. The limiting structure includes the flanges 52, and the space between the two sets of base plates 51 forms a placement space.

[0042] The flange 52 is located at the top of the base plate 51, and the flanges 52 of the two sets of limiting plates 5 are arranged close to each other, that is, the two sets of flanges 52 are opposite each other. When the upper mold 21 moves and drives the upper wall of the heat shrink sleeve 7 to expand upward, the flange 52 radially blocks the outer wall of the heat shrink sleeve 7, and can apply radial clamping force to the heat shrink sleeve 7 to assist the expansion of the heat shrink sleeve 7 and improve the expansion efficiency.

[0043] Preferably, the base plate 51 is provided with a fixing hole 53, which is used to install a fixing bolt connected to the lower mold 22. The fixing hole 53 is an elongated hole extending along the axial direction perpendicular to the heat shrink sleeve 7.

[0044] The base plate 51 is connected to the lower mold 22 through the fixing hole 53 and fixing bolts. Since the fixing hole 53 is a long hole and perpendicular to the axis of the heat shrink tubing 7, the position of the base plate 51 and the distance between the two sets of limiting plates 5 can be adjusted through the long hole.

[0045] Preferably, the upper mold 21 includes a fixing member 211 and an adsorption member 212 disposed at the bottom of the fixing member 211. The adsorption member 212 is detachably connected to the fixing member 211. The side of the adsorption member 212 is an inclined surface that tapers from both sides to the middle. The bottom surface of the adsorption member 212 forms an adsorption surface 24.

[0046] The upper mold 21 is divided into a fixing part 211 and an adsorption part 212. The fixing part 211 is used to connect with the drive cylinder 26. The adsorption part 212 and the fixing part 211 are detachably connected, which facilitates the replacement of the corresponding adsorption part 212 according to the size of the heat shrink tubing 7, ensuring the adsorption force on the heat shrink tubing 7. The side of the adsorption part 212 is a slope, which provides space for the flange 52 of the limiting plate 5, avoiding interference with the flange 52 and ensuring the limiting effect of the flange 52 on the heat shrink tubing 7.

[0047] Preferably, the negative pressure channel 25 includes a main channel 251 and a plurality of branch channels 252 connected to the main channel 251. The branch channels 252 are arranged at intervals along the axial direction of the heat shrink tubing 7. Each branch channel 252 is perpendicular to the adsorption surface 24. The main channel 251 is used to connect to the negative pressure mechanism.

[0048] Multiple branch channels 252 are evenly spaced along the axial direction of the heat shrink tubing 7, which can provide adsorption force throughout the entire axial direction of the heat shrink tubing 7, so that the upper wall of the heat shrink tubing 7 is tightly attached to the adsorption surface 24 of the upper mold 21 throughout the entire axial direction, without expansion or contraction, thus ensuring the efficiency of expansion.

[0049] Preferably, the movable seat 4 includes a support plate 41, a pressure block 42 vertically movably arranged on the upper side of the support plate 41, and a vertical drive member arranged on the support plate 41. The top of the support plate 41 is provided with a support groove 44 for supporting the transfer rod 3. The vertical drive member is used to drive the pressure block 42 to move vertically to press or release the transfer rod 3.

[0050] The vertical drive unit can drive the pressure block 42 to move up and down, changing the position of the pressure block 42. When the pressure block 42 moves downward, it can press the transfer rod 3 into the support groove 44 of the support plate 41 to fix the transfer rod 3, so that the moving seat 4 can drive the transfer rod 3 to move synchronously. When the pressure block 42 moves upward, it releases the transfer rod 3, so that the robot can transfer the transfer rod 3 to the next station and place the transfer rod 3 into the support groove 44.

[0051] Preferably, the support groove 44 is a V-shaped groove, the vertical drive component is a vertical cylinder 43, and the top end of the piston rod of the vertical cylinder 43 is fixedly connected to the pressure block 42.

[0052] The V-groove has strong adaptability and can support and fix transfer rods 3 of different diameters, making it easy to replace the transfer rod 3 with the corresponding diameter of the heat shrink tubing 7 that needs to be expanded as needed. The vertical cylinder 43 serves as a vertical drive component, which is a mature technology and easy to automate; in other embodiments, the vertical drive component can also be a hydraulic cylinder, electric actuator, etc.

[0053] Preferably, the movable seat 4 further includes a rotary table 45 that can rotate about a vertical center line, with a support plate 41 fixedly mounted on the top of the rotary table 45, and the rotary table 45 being guided and assembled with the guide rail 11.

[0054] The support platform is fixedly mounted on the top of the rotary table 45. When the rotary table 45 rotates, it can drive the support plate 41 and the central rotating rod 3 to rotate synchronously, adjusting the position of the central rotating rod 3. When the space between the moving seat 4 and the expansion mold 2 is insufficient to accommodate the robot arm, the rotary table 45 can move the central rotating rod 3 to a position away from the expansion mold 2, providing space for the robot arm to grasp the central rotating rod 3. In this embodiment, the rotary table 45 is a rotary cylinder, which can reciprocate, facilitating automated operation.

[0055] Preferably, a horizontal cylinder 6 is provided on the base 1, which is arranged along the axial direction of the heat shrink tubing 7, and the horizontal cylinder 6 is connected to the movable seat 4 in a transmission manner.

[0056] The horizontal cylinder 6 can drive the movable seat 4 to move along the guide rail 11, adjusting the position of the movable seat 4. By driving the movable seat 4 to move through the horizontal cylinder 6, automated assembly line operation can be achieved.

[0057] The present invention also provides a preferred embodiment of a method for processing heat-shrinkable tubing for reinforcing bars. The method using the heat-shrinkable tubing processing apparatus of any of the above embodiments includes the following steps:

[0058] S1, the flat heat shrink tubing 7 after being cut is placed between the upper mold 21 and the lower mold 22 of the expansion mold 2. The upper mold 21 moves downward and closes with the lower mold 22. The negative pressure mechanism generates an adsorption force on the adsorption surface 24 of the upper mold 21 and the lower mold 22 through the negative pressure channel 25, and the heat shrink tubing 7 is adsorbed and fixed.

[0059] S2, the upper mold 21 moves upward, causing the upper wall of the heat shrink tubing 7 to move upward. Under the limiting structure of the limiting plate 5, the heat shrink tubing 7 expands, forming an opening at the end near the transfer bar 3.

[0060] S3, the movable seat 4 moves to the working state on the guide rail 11 of the base 1, the transfer rod 3 is axially inserted into the heat shrink sleeve 7, the heat shrink sleeve 7 is expanded into a circle, and the heat shrink sleeve 7 is fitted on the transfer rod 3.

[0061] S4, the moving seat 4 moves to the initial state, the transfer bar 3 drives the heat shrink tubing 7 out of the expansion mold 2, and the external robot arm transfers the transfer bar 3 and the heat shrink tubing 7 on it to the next station.

[0062] In step S1, after the heat shrink tubing 7 is cut to a set length, the drive cylinder 26 receives a command from the controller to drive the upper mold 21 to move upward, and the heat shrink tubing 7 enters the placement space between the limiting plates 5 of the lower mold 22. The drive cylinder 26 drives the upper mold 21 to move downward, fixing the heat shrink tubing 7 between the upper mold 21 and the lower mold 22. Then, the negative pressure mechanism works, and the adsorption surface 24 adsorbs and fixes the upper and lower walls of the heat shrink tubing 7.

[0063] In step S2, the driving cylinder 26 drives the upper mold 21 to move upward, and under the action of the adsorption force of the adsorption surface 24, it drives the upper wall of the heat shrink sleeve 7 to move. Since the limiting plate 5 limits the radial direction of the heat shrink sleeve 7, the heat shrink sleeve 7 is subjected to a horizontal clamping force, thereby forming an opening at the end.

[0064] In step S3, the controller transmits an action command to the horizontal cylinder 6, and the horizontal cylinder 6 drives the moving seat 4 to move on the guide rail 11, so as to change the position of the central bar 3 through the moving seat 4.

[0065] In step S4, after receiving the action command from the controller, the horizontal cylinder 6 drives the moving seat 4 to move to the initial state, and the robot moves the transfer rod 3 and the heat shrink tubing 7 to the next station simultaneously. After the heat shrink tubing 7 is fitted onto the cable, the robot grips the transfer rod 3 and moves it to the moving seat 4. The expansion operation is completed and the robot waits for the next work cycle.

[0066] Preferably, the method further includes the step of adjusting the spacing of the limiting plates 5, adjusting the spacing between the two sets of limiting plates 5 according to the required expanded diameter of the heat shrink tubing 7.

[0067] When adjusting the distance between the two sets of limiting plates 5, the limiting plate 5 slides on the lower mold 22. The position of the limiting plate 5 can be adjusted by adjusting the relative position between the fixing bolt and the fixing hole 53.

[0068] Preferably, in step S4, after the movable seat 4 moves to the initial state, the robot grips the transfer rod 3, the vertical drive drives the pressure block 42 to move upward and release the transfer rod 3, and the robot transfers the transfer rod 3 and the heat shrink tubing 7 to the next station.

[0069] Preferably, in step S4, after the movable seat 4 moves to the initial state, the rotary table 45 drives the support plate 41 to rotate 90 degrees to 180 degrees, and the robot arm then grips the transfer rod 3.

[0070] The rotating table 45 drives the support plate 41 to rotate 90 degrees to 180 degrees, which can move the transfer bar 3 to a position away from the expansion mold 2, providing space for the robot arm to hold the transfer bar 3.

[0071] In summary, this invention provides a steel bar heat shrink tubing processing device and method. The negative pressure channels on the upper and lower molds of the expansion mold can be connected to an external negative pressure mechanism. The negative pressure mechanism generates negative pressure on the adsorption surfaces of the upper and lower molds through the negative pressure channels, which can fix the flat heat shrink tubing. When the upper mold moves vertically, it can cause the upper wall and lower wall of the heat shrink tubing to separate. Under the action of the limiting structure, the end of the heat shrink tubing forms an opening. When the moving seat moves on the guide rail to the working state, it can drive the transfer rod to insert into the heat shrink tubing, expanding the heat shrink tubing into a circle. During the expansion process, the adsorption surfaces of the upper and lower molds always fix the heat shrink tubing, avoiding the expansion and contraction of the heat shrink tubing and ensuring the processing efficiency of the heat shrink tubing.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A device for processing steel bar heat shrink tubing, characterized in that, Includes a base, on which an expansion mold, a transfer rod, and a movable seat are provided; The expansion mold includes a lower mold disposed on the base and an upper mold arranged opposite to the lower mold. The upper mold is movable up and down. The bottom of the upper mold and the top of the lower mold are both provided with adsorption surfaces for adsorbing heat shrink tubing. Negative pressure channels are provided inside the upper mold and the lower mold. The negative pressure channels include a main channel and multiple branch channels connected to the main channel. The branch channels are arranged at intervals along the axial direction of the heat shrink tubing. Each branch channel is perpendicular to the adsorption surface. The main channel is used to connect to the negative pressure mechanism. The top of the lower mold is also provided with a limiting plate for limiting the heat shrink tubing. There are two sets of limiting plates, which are located on both sides of the adsorption surface and extend along the axial direction of the heat shrink tubing. A placement space for placing the heat shrink tubing to be expanded is formed between the two sets of limiting plates. The limiting plate includes a base plate fixedly connected to the lower mold and a flange provided on the top of the base plate. The flanges of the two sets of limiting plates are arranged close to each other. The limiting plate is provided with a limiting structure for blocking and limiting the outer wall of the heat shrink tubing. The limiting structure includes the flange. The space between the two sets of base plates forms the placement space. The base is provided with a guide rail extending along the axial direction of the heat shrink tubing. The movable seat is guided and assembled on the guide rail. The movable seat is used to clamp and fix the transfer rod. During the movement stroke, the movable seat has an initial state in which the transfer rod is located outside the expansion mold and a working state in which the transfer rod is inserted into the heat shrink tubing to expand the heat shrink tubing.

2. The steel bar heat shrink tubing processing device according to claim 1, characterized in that, The base plate is provided with fixing holes for mounting fixing bolts that are connected to the lower mold. The fixing holes are elongated holes that extend along the axial direction perpendicular to the heat shrink tubing.

3. The steel bar heat shrink tubing processing device according to any one of claims 1-2, characterized in that, The upper mold includes a fixing member and an adsorption member disposed at the bottom of the fixing member. The adsorption member is detachably connected to the fixing member. The side of the adsorption member is an inclined surface that tapers from both sides to the middle. The bottom surface of the adsorption member forms the adsorption surface.

4. The steel bar heat shrink tubing processing device according to any one of claims 1-2, characterized in that, The movable seat includes a support plate, a pressure block vertically movably arranged on the upper side of the support plate, and a vertical drive member arranged on the support plate. The top of the support plate is provided with a support groove for supporting the transfer bar. The vertical drive member is used to drive the pressure block to move vertically to press or release the transfer bar.

5. The steel bar heat shrink tubing processing device according to claim 4, characterized in that, The support groove is a V-shaped groove, the vertical drive component is a vertical cylinder, and the top end of the piston rod of the vertical cylinder is fixedly connected to the pressure block.

6. The steel bar heat shrink tubing processing device according to claim 4, characterized in that, The movable seat also includes a rotary table that can rotate around a vertical center line, the support plate is fixedly mounted on the top of the rotary table, and the rotary table is guided and assembled with the guide rail.

7. The steel bar heat shrink tubing processing device according to any one of claims 1-2, characterized in that, The base is provided with a horizontal cylinder arranged along the axial direction of the heat shrink tubing, and the horizontal cylinder is throttle-connected to the movable seat.

8. A method for processing steel bar heat shrink tubing, using the steel bar heat shrink tubing processing apparatus according to any one of claims 1-7, characterized in that, Includes the following steps: S1, the flat heat shrink tubing after being cut is placed between the upper and lower molds of the expansion mold. The upper mold moves downward and closes with the lower mold. The negative pressure mechanism generates an adsorption force on the adsorption surface of the upper and lower molds through the negative pressure channel, and the heat shrink tubing is adsorbed and fixed. S2, the upper mold moves upward, causing the upper wall of the heat shrink tubing to move upward. Under the limiting structure of the limiting plate, the heat shrink tubing expands, forming an opening at the end near the transfer bar. S3, the movable seat moves to the working state on the guide rail of the base, the transfer rod is axially inserted into the heat shrink tubing, the heat shrink tubing is expanded into a circle, and the heat shrink tubing is fitted onto the transfer rod; S4, the moving seat moves to the initial state, the transfer bar drives the heat shrink tubing out of the expansion mold, and the external robot arm transfers the transfer bar and the heat shrink tubing on it to the next station.

9. The method for processing steel bar heat shrink tubing according to claim 8, characterized in that, Step S1 also includes adjusting the spacing between the limiting plates. The spacing between the two sets of limiting plates is adjusted according to the required expanded diameter of the heat shrink tubing.

10. The method for processing steel bar heat shrink tubing according to claim 8 or 9, characterized in that, In step S4, after the moving seat moves to the initial state, the robot grips the transfer bar, the vertical drive drives the pressure block to move upward and release the transfer bar, and the robot transfers the transfer bar and heat shrink tubing to the next station.

11. The method for processing steel bar heat shrink tubing according to claim 10, characterized in that, In step S4, after the movable seat moves to the initial state, the rotary table drives the support plate to rotate 90 degrees to 180 degrees, and the robot arm then grips the transfer bar.

Images