Thermoplastic part butt joint hot welding equipment

Abstract

The invention relates to the technical field of hot welding of thermoplastic parts, and discloses butt joint hot welding equipment for thermoplastic parts. After an upper mold and a lower mold carry a thermoplastic part to abut against each other, a positioning bottom plate is lifted, so that the positioning bottom plate abuts against the bottom end of the thermoplastic part from the bottom end, the positioning bottom plate synchronously limits the side face of the thermoplastic part, and meanwhile, a positioning top plate rotates to rotate to the top end of the thermoplastic part, so that the positioning top plate abuts against the top end of the thermoplastic part; the distance between the positioning top plate and the positioning bottom plate is used for controlling the distance between the top end and the bottom end of the thermoplastic part, so that the relative parallelism between the upper thermoplastic part and the lower thermoplastic part is controlled, and the flatness of the whole thermoplastic part after the thermoplastic part is welded is ensured; therefore, the situation that the thermoplastic parts are relatively inclined during hot welding is prevented, the quality of hot welding treatment is improved, the qualified rate of product production is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of thermoplastic part thermal welding, in particular to a thermoplastic part butt thermal welding device. Background Art

[0002] Thermal welding is also called aluminum thermite welding. Aluminum thermite welding means that the ends of the two workpieces to be welded are fixed in a mold in advance, and then a mixture of aluminum powder and iron oxide powder is placed in a crucible and heated to cause a reduction exothermic reaction, and liquid metal and molten slag are injected into the mold. At present, thermal welding mostly uses thermal welding equipment to butt-weld thermoplastic parts.

[0003] In the existing welding equipment, such as Chinese patent application CN104924598A, after all the jig plates are processed by hot melt welding with a hot melt machine, the hot melt columns are loaded into the upper template automatic lathe for processing, and then assembled and fixed before debugging. After debugging is completed, the new hot melt jig is mounted on the machine and heated for production without debugging, thereby reducing the debugging time of the equipment during the production process and improving the stable production capacity of the products; the upper and lower molds of the new hot melt machine are positioned and fixed by cylinders, the jig is easy to disassemble, and the time for upper and lower molds is reduced, which has a very good effect.

[0004] However, there are still the following problems: when the thermoplastic parts are butt-jointed and hot-welded, there is a relative inclination between the thermoplastic parts, resulting in a high failure rate of the thermoplastic parts after welding and high production costs. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a thermoplastic butt hot welding device, which has the advantages of preventing relative inclination between thermoplastic parts when hot welding them, improving the quality of hot welding treatment, improving the qualified rate of product production, and reducing production costs. It solves the problem that when the thermoplastic parts are butt-jointed and hot welded, there is relative inclination between the thermoplastic parts, which leads to a high unqualified rate of thermoplastic parts after welding and high production costs.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermoplastic butt heat welding device, comprising a body, a welding mechanism arranged on the body, and an auxiliary mechanism arranged on the body, wherein the welding mechanism comprises a lower mold and an upper mold, wherein the lower mold is fixedly mounted on the body, and the upper mold is movably arranged on the body, wherein the lower mold is located directly below the upper mold, and the lower mold is matched with the upper mold, so that the upper mold and the lower mold each carry a thermoplastic part against each other for welding;

[0007] The auxiliary mechanism comprises a positioning bottom plate and a positioning top plate, the positioning bottom plate is movably arranged on the machine body, and two positioning bottom plates are symmetrically distributed on both sides of the lower mold, the positioning top plate is movably arranged on the machine body, and two positioning top plates are symmetrically distributed on both sides of the lower mold, the positioning top plate is adjacent to the positioning bottom plate, and the positioning bottom plate is located between the lower mold and the positioning top plate;

[0008] After the lower mold and the upper mold carry the thermoplastic part against each other, the positioning bottom plate is lifted to abut against the bottom end of the thermoplastic part and limits the side of the thermoplastic part, and the positioning top plate is rotated to abut against the top end of the thermoplastic part, so that the positioning bottom plate and the positioning top plate control the fixed distance between the top and bottom ends of the thermoplastic part.

[0009] Preferably, the welding mechanism also includes a positioning ring, and a plurality of the positioning rings are fixedly installed at the top end of the body, and the positioning rings are symmetrically distributed on both sides of the upper mold, and the positioning rings are slidably fitted with a first rack, and the first racks all pass through the positioning rings, and the positioning rings are rotatably fitted with a first gear, and the first gears are meshed with the first racks, and a stepper motor is fixedly installed at the top end of the body, and the stepper motor and the first gear are both poweredly connected.

[0010] Preferably, a connecting frame is provided in the body, the top end of the connecting frame is fixedly connected to the bottom end of the first rack, a plurality of telescopic rods are fixedly installed on the bottom end of the connecting frame, and the bottom ends of the telescopic rods are fixedly connected to the upper mold.

[0011] Preferably, the telescopic rods are sleeved with springs, the top ends of the springs are connected to the connecting frame, and the bottom ends of the springs are connected to the upper mold. The elastic force of the springs is greater than the gravity of the upper mold, so that when the upper mold carries the thermoplastic part, the total gravity of the upper mold and the thermoplastic part cannot cause the spring to deform.

[0012] Preferably, a positioning slot rod is fixedly installed in the body, the positioning slot rod is adjacent to the lower mold, a positioning plug rod is fixedly installed at the bottom end of the connecting frame, the positioning plug rod is adjacent to the upper mold, the positioning plug rod is located directly above the positioning slot rod, and the positioning plug rod is adapted to the positioning slot rod.

[0013] Preferably, a second rack is fixedly installed in the body, the second rack is adjacent to the welding position between the lower mold and the upper mold, the second rack is located between the upper mold and the lower mold, a servo motor is slidably fitted on the second rack, a second gear is fixedly installed on the shaft of the servo motor, the second gear is meshed with the second rack, a welding arm is fixedly installed on the servo motor, the welding arm is a multi-section rotatable structure, so that after the welding arm is abutted against the thermoplastic part, the two ends of the welding arm respectively press against the two sides of the thermoplastic part for welding.

[0014] Preferably, the auxiliary mechanism also includes a trigger member, the trigger member is fixedly mounted on the positioning rod, the detection member is fixedly mounted on the positioning slot rod, the trigger member is located directly above the detection member, and when the positioning rod abuts against the positioning slot rod, the trigger member abuts against the detection member, so that the trigger member triggers the detection member to generate a control signal.

[0015] Preferably, a plurality of electrically-controlled telescopic rods are fixedly installed in the machine body, the electrically-controlled telescopic rods all penetrate the wall of the machine body, the electrically-controlled telescopic rods are symmetrically distributed on both sides of the lower mold, the electrically-controlled telescopic rods are all located directly below the positioning base plate, the electrically-controlled telescopic rods are all fixedly connected to the positioning base plate, a plurality of tumble arm cylinders are fixedly installed in the machine body, the tumble arm cylinders are symmetrically distributed on both sides of the lower mold, each tumble arm cylinder is dynamically connected to each positioning top plate, the detection component is signal-connected to the electrically-controlled telescopic rod, and the detection component is signal-connected to the tumble arm cylinder.

[0016] Preferably, one side of the positioning top plate is rotatably engaged with a screw rod, the screw rod is sleeved with a ball nut, the ball nut is threadedly connected to the screw rod, the ball nut is slidably engaged with the positioning top plate, and an infrared detector is fixedly installed on the ball nut, the infrared detector on one side generates an infrared detection line, and the infrared detector on the other side receives the infrared detection line.

[0017] Compared with the prior art, the present invention provides a thermoplastic butt welding device, which has the following beneficial effects:

[0018] 1. The thermoplastic butt welding equipment, after the upper mold and the lower mold carry the thermoplastic part against each other, the positioning bottom plate is lifted, so that the positioning bottom plate is pressed against the bottom end of the thermoplastic part from the bottom end, and the positioning bottom plate simultaneously limits the side of the thermoplastic part, and at the same time, the positioning top plate is rotated, so that the positioning top plate is rotated to the top end of the thermoplastic part, so that the positioning top plate is pressed against the top end of the thermoplastic part, so that the positioning top plate and the positioning bottom plate fix and limit the thermoplastic part, and the distance between the positioning top plate and the positioning bottom plate is used to control the distance between the top end and the bottom end of the thermoplastic part, that is, to control the relative distance between the upper thermoplastic part and the lower thermoplastic part The distance between the top and bottom of the thermoplastic part is used to control the relative position of the upper thermoplastic part and the lower thermoplastic part, so as to control the relative parallelism between the upper thermoplastic part and the lower thermoplastic part. When the thermoplastic part is further welded, no matter whether the whole thermoplastic part is tilted or not, the upper thermoplastic part is relatively parallel to the lower thermoplastic part, thereby ensuring the flatness of the whole thermoplastic part after welding the thermoplastic parts, thereby preventing the thermoplastic parts from tilting relative to each other during heat welding, improving the quality of heat welding, improving the qualified rate of product production, and reducing production costs.

[0019] 2. The thermoplastic part is butted with the heat welding equipment. Through the setting of the spring, after the upper mold and the lower mold carrying the thermoplastic part are butted against each other, the spring gives the upper mold a pressure buffer, thereby ensuring that the thermoplastic part between the upper mold and the lower mold will not be damaged by pressure, thereby improving the stability of the equipment operation.

[0020] 3. The thermoplastic part is connected to the heat welding equipment. Through the setting of the infrared detector, the infrared detector is turned to face the thermoplastic part, so that the infrared detector detects the distance between the infrared detector and the positioning top plate and the top of the thermoplastic part, thereby assisting in judging whether the relative heights on both sides of the thermoplastic part are consistent, thereby assisting in detecting whether the thermoplastic parts are relatively parallel, further ensuring that the thermoplastic parts have a correct positional relationship during the welding process, and improving the stability of the equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the heat welding equipment of the present invention;

[0022] Figure 2 It is a schematic diagram of the welding mechanism structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure distribution of the lower mold of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure distribution of the upper mold of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure distribution of the welding arm of the present invention;

[0026] Figure 6It is a schematic diagram of the auxiliary mechanism structure of the present invention;

[0027] Figure 7 for Figure 6 The enlarged structural diagram at A in the middle;

[0028] Figure 8 This is a schematic diagram of the structural distribution at the positioning top plate of the present invention.

[0029] In the figure: 1. body; 2. welding mechanism; 21. lower mold; 22. positioning ring; 23. first rack; 24. first gear; 25. stepping motor; 26. connecting frame; 27. telescopic rod; 28. upper mold; 29. ​​spring; 210. positioning slot rod; 211. positioning plug rod; 212. second rack; 213. servo motor; 214. second gear; 215. welding arm; 3. auxiliary mechanism; 31. trigger member; 32. detection member; 33. electric control telescopic rod; 34. positioning bottom plate; 35. rotating arm cylinder; 36. positioning top plate; 37. screw; 38. ball nut; 39. infrared detector. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a thermoplastic butt welding device.

[0032] In a typical implementation of the present application, Figure 1-Figure 8 As shown, a thermoplastic butt heat welding device comprises a body 1, a welding mechanism 2 arranged on the body 1, and an auxiliary mechanism 3 arranged on the body 1, wherein the welding mechanism 2 comprises a lower mold 21 and an upper mold 28, wherein the lower mold 21 is fixedly mounted on the body 1, and the upper mold 28 is movably arranged on the body 1, wherein the lower mold 21 is located directly below the upper mold 28, and the lower mold 21 is matched with the upper mold 28, so that the upper mold 28 and the lower mold 21 respectively carry thermoplastic parts against each other for welding;

[0033] The auxiliary mechanism 3 includes a positioning bottom plate 34 and a positioning top plate 36. The positioning bottom plate 34 is movably provided on the machine body 1. The two positioning bottom plates 34 are symmetrically distributed on both sides of the lower mold 21. The positioning top plates 36 are movably provided on the machine body 1. The two positioning top plates 36 are symmetrically distributed on both sides of the lower mold 21. The positioning top plates 36 are adjacent to the positioning bottom plate 34. The positioning bottom plate 34 is located between the lower mold 21 and the positioning top plates 36.

[0034] After the lower mold 21 and the upper mold 28 carry the thermoplastic part to abut against each other, the positioning bottom plate 34 is lifted to abut against the bottom end of the thermoplastic part and limit the side of the thermoplastic part. The positioning top plate 36 is rotated to abut against the top end of the thermoplastic part, so that the positioning bottom plate 34 and the positioning top plate 36 control the fixed distance between the top and bottom ends of the thermoplastic part.

[0035] When using the present invention:

[0036] The thermoplastic parts to be welded are placed in the upper mold 28 and the lower mold 21 respectively, and the heat welding equipment is started. The upper mold 28 carries the thermoplastic parts and abuts against the lower mold 21. After the upper mold 28 and the lower mold 21 carry the thermoplastic parts and abut against each other, the positioning bottom plate 34 is lifted, so that the positioning bottom plate 34 abuts against the bottom end of the thermoplastic parts from the bottom end, and the positioning bottom plate 34 simultaneously limits the side of the thermoplastic parts. At the same time, the positioning top plate 36 rotates, so that the positioning top plate 36 rotates to the top end of the thermoplastic parts, so that the positioning top plate 36 abuts against the top end of the thermoplastic parts, so that the positioning top plate 36 and the positioning bottom plate 34 fix and limit the thermoplastic parts, and the distance between the positioning top plate 36 and the positioning bottom plate 34 is used to control the thermoplastic parts. The distance between the top and bottom of the thermoplastic part, that is, the relative distance between the upper thermoplastic part and the lower thermoplastic part is controlled, so as to use the distance control from the top to the bottom of the thermoplastic part to limit the relative position between the upper thermoplastic part and the lower thermoplastic part, and thereby achieve the control of the relative parallelism between the upper thermoplastic part and the lower thermoplastic part, so that when the thermoplastic part continues to be welded, regardless of whether the entire thermoplastic part is tilted, the upper thermoplastic part is relatively parallel to the lower thermoplastic part, thereby ensuring the flatness of the entire thermoplastic part after welding the thermoplastic parts, thereby preventing the thermoplastic parts from tilting relative to each other during heat welding, improving the quality of heat welding, improving the qualified rate of product production, and reducing production costs.

[0037] Furthermore, the welding mechanism 2 also includes a positioning ring 22. A plurality of positioning rings 22 are fixedly installed at the top of the body 1. The positioning rings 22 are symmetrically distributed on both sides of the upper mold 28. The positioning rings 22 are slidably fitted with a first rack 23. The first racks 23 all penetrate the positioning rings 22. The positioning rings 22 are rotatably fitted with a first gear 24. The first gears 24 are meshed with the first racks 23. A stepper motor 25 is fixedly installed at the top of the body 1. The stepper motor 25 and the first gear 24 are both poweredly connected.

[0038] Furthermore, a connecting frame 26 is provided in the machine body 1 , the top end of the connecting frame 26 is fixedly connected to the bottom end of the first rack 23 , a plurality of telescopic rods 27 are fixedly installed at the bottom end of the connecting frame 26 , and the bottom ends of the telescopic rods 27 are fixedly connected to the upper mold 28 .

[0039] Furthermore, springs 29 are sleeved on the telescopic rods 27, the top ends of the springs 29 are connected to the connecting frame 26, and the bottom ends of the springs 29 are connected to the upper mold 28. The elastic force of the springs 29 is greater than the gravity of the upper mold 28, so that when the upper mold 28 carries the thermoplastic part, the combined gravity of the upper mold 28 and the thermoplastic part cannot cause the springs 29 to deform.

[0040] Furthermore, a positioning slot rod 210 is fixedly installed in the body 1, and the positioning slot rod 210 is adjacent to the lower mold 21. A positioning plug rod 211 is fixedly installed at the bottom end of the connecting frame 26, and the positioning plug rod 211 is adjacent to the upper mold 28. The positioning plug rod 211 is located directly above the positioning slot rod 210, and the positioning plug rod 211 is adapted to the positioning slot rod 210.

[0041] Among them, before the welding process, the thermoplastic parts are respectively placed in the upper mold 28 and the lower mold 21, and the stepper motor 25 is started. The stepper motor 25 drives the first gear 24 to rotate, and the first gear 24 drives the first rack 23 to move on the positioning ring 22. The first rack 23 drives the connecting frame 26 to move, and the connecting frame 26 drives the telescopic rod 27 to move, and the telescopic rod 27 drives the upper mold 28 to move, so that the upper mold 28 carries the thermoplastic parts against the lower mold 21, and after the collision, the reaction force generated by the upper mold 28 compresses the spring 29 to shrink. At the same time, with the movement of the connecting frame 26, the connecting frame 26 drives the positioning rod 211 to move, and the positioning rod 211 is inserted into the positioning slot rod 210, so as to use the positioning rod 211 to determine whether the movement of the lower mold 21 is offset.

[0042] Furthermore, a second rack 212 is fixedly installed in the machine body 1, and the second rack 212 is adjacent to the welding position between the lower mold 21 and the upper mold 28. The second rack 212 is located between the upper mold 28 and the lower mold 21. A servo motor 213 is slidably fitted on the second rack 212, and a second gear 214 is fixedly installed on the shaft of the servo motor 213. The second gear 214 is meshed with the second rack 212. A welding arm 215 is fixedly installed on the servo motor 213. The welding arm 215 is a multi-section rotatable structure. After the welding arm 215 is abutted against the thermoplastic part, the two ends of the welding arm 215 are respectively against the two sides of the thermoplastic part for welding.

[0043] Furthermore, the welding arm 215 is a combination structure of a robot arm and a welding head. The welding arm 215 is used to perform welding processing on thermoplastic parts. The welding arm 215 is an existing structure and will not be described in detail here.

[0044] Among them, after the operation of the auxiliary mechanism 3 is completed, the servo motor 213 is started, the servo motor 213 drives the second gear 214 to rotate, so that the second gear 214 moves on the second rack 212, the second gear 214 drives the servo motor 213 to move, and the servo motor 213 drives the welding arm 215 to move, so that the welding arm 215 is attached to the thermoplastic part, so that the welding arm 215 can be used to weld the thermoplastic part.

[0045] Furthermore, the auxiliary mechanism 3 also includes a trigger member 31, the trigger member 31 is fixedly installed on the positioning rod 211, and the detection member 32 is fixedly installed on the positioning slot rod 210. The trigger member 31 is located directly above the detection member 32. When the positioning rod 211 and the positioning slot rod 210 are abutted, the trigger member 31 and the detection member 32 are abutted, so that the trigger member 31 triggers the detection member 32 to generate a control signal.

[0046] Furthermore, a plurality of electrically-controlled telescopic rods 33 are fixedly installed in the machine body 1, and the electrically-controlled telescopic rods 33 all penetrate the wall of the machine body 1, and are symmetrically distributed on both sides of the lower mold 21, and are located directly below the positioning base plate 34, and are fixedly connected to the positioning base plate 34; a plurality of swivel arm cylinders 35 are fixedly installed in the machine body 1, and the swivel arm cylinders 35 are symmetrically distributed on both sides of the lower mold 21, and each swivel arm cylinder 35 is dynamically connected to each positioning top plate 36, and the detection component 32 is signal-connected to the electrically-controlled telescopic rod 33, and the detection component 32 is signal-connected to the swivel arm cylinder 35.

[0047] Among them, as the positioning groove rod 210 and the positioning plug rod 211 are abutted, the trigger member 31 moves with the positioning plug rod 211 and abuts against the detection member 32. The detection member 32 detects the contact with the trigger member 31, thereby generating a signal to control the electric control telescopic rod 33 and the rotating arm cylinder 35 to start. The electric control telescopic rod 33 drives the positioning base plate 34 to move, so that the positioning base plate 34 abuts against the bottom end of the thermoplastic part and limits the side of the thermoplastic part. The rotating arm cylinder 35 drives the positioning top plate 36 to rotate, so that the positioning top plate 36 abuts against the top of the thermoplastic part, thereby using the positioning top plate 36 and the positioning base plate 34 to control the relative positions of the upper and lower thermoplastic parts.

[0048] Furthermore, one side of the positioning top plate 36 is rotatably engaged with a screw rod 37, and a ball nut 38 is sleeved on the screw rod 37. The ball nut 38 is threadedly connected to the screw rod 37, and the ball nut 38 is slidably engaged with the positioning top plate 36. An infrared detector 39 is fixedly mounted on the ball nut 38. The infrared detector 39 on one side generates an infrared detection line, and the infrared detector 39 on the other side receives the infrared detection line.

[0049] Among them, as the positioning top plate 36 rotates, the positioning top plate 36 drives the screw 37 to rotate, the screw 37 drives the ball nut 38 to rotate, and the ball nut 38 drives the infrared detector 39 to rotate, so that the infrared detector 39 turns to face the thermoplastic part, so that the infrared detector 39 detects the distance between the infrared detector 39 and the positioning top plate 36 and the top of the thermoplastic part, thereby assisting in judging whether the relative heights of the two sides of the thermoplastic part are consistent.

[0050] Working principle:

[0051] The thermoplastic parts to be welded are placed in the upper mold 28 and the lower mold 21 respectively, and the heat welding equipment is started. The upper mold 28 carries the thermoplastic parts and abuts against the lower mold 21. After the upper mold 28 and the lower mold 21 carry the thermoplastic parts, the positioning bottom plate 34 is lifted, so that the positioning bottom plate 34 abuts against the bottom end of the thermoplastic parts from the bottom end, and the positioning bottom plate 34 simultaneously limits the side of the thermoplastic parts. At the same time, the positioning top plate 36 rotates, so that the positioning top plate 36 rotates to the top end of the thermoplastic parts, so that the positioning top plate 36 abuts against the top end of the thermoplastic parts, so that the positioning top plate 36 and the positioning bottom plate 34 fix and limit the thermoplastic parts. The distance between the positioning top plate 36 and the positioning bottom plate 34 is used to control the distance between the top and bottom of the thermoplastic part, that is, to control the relative distance between the upper thermoplastic part and the lower thermoplastic part, so as to limit the relative position between the upper thermoplastic part and the lower thermoplastic part by controlling the distance between the top and bottom of the thermoplastic part, and thereby achieve the control of the relative parallelism between the upper thermoplastic part and the lower thermoplastic part, so that when the thermoplastic part continues to be welded, regardless of whether the entire thermoplastic part is tilted, the upper thermoplastic part is relatively parallel to the lower thermoplastic part, thereby ensuring the flatness of the entire thermoplastic part after welding.

[0052] Before welding, the thermoplastic parts are placed in the upper mold 28 and the lower mold 21 respectively, and the stepper motor 25 is started. The stepper motor 25 drives the first gear 24 to rotate, and the first gear 24 drives the first rack 23 to move on the positioning ring 22. The first rack 23 drives the connecting frame 26 to move, and the connecting frame 26 drives the telescopic rod 27 to move, and the telescopic rod 27 drives the upper mold 28 to move, so that the upper mold 28 carries the thermoplastic parts against the lower mold 21, and after the contact, the reaction force generated by the upper mold 28 compresses the spring 29 to shrink. At the same time, with the movement of the connecting frame 26, the connecting frame 26 drives the positioning rod 211 to move, and the positioning rod 211 is inserted into the positioning slot rod 210, so as to use the positioning rod 211 to determine whether the movement of the lower mold 21 is offset;

[0053] After the auxiliary mechanism 3 is finished running, the servo motor 213 is started, the servo motor 213 drives the second gear 214 to rotate, so that the second gear 214 moves on the second rack 212, the second gear 214 drives the servo motor 213 to move, and the servo motor 213 drives the welding arm 215 to move, so that the welding arm 215 is close to the thermoplastic part, so that the thermoplastic part is welded by the welding arm 215;

[0054] As the positioning slot rod 210 abuts against the positioning plug rod 211, the trigger member 31 moves with the positioning plug rod 211 and abuts against the detection member 32. The detection member 32 detects the contact with the trigger member 31, thereby generating a signal to control the electric control telescopic rod 33 and the rotating arm cylinder 35 to start. The electric control telescopic rod 33 drives the positioning bottom plate 34 to move, so that the positioning bottom plate 34 abuts against the bottom end of the thermoplastic part and limits the side of the thermoplastic part. The rotating arm cylinder 35 drives the positioning top plate 36 to rotate, so that the positioning top plate 36 abuts against the top end of the thermoplastic part, thereby using the positioning top plate 36 and the positioning bottom plate 34 to control the relative positions of the upper and lower thermoplastic parts.

[0055] As the positioning top plate 36 rotates, the positioning top plate 36 drives the screw 37 to rotate, the screw 37 drives the ball nut 38 to rotate, and the ball nut 38 drives the infrared detector 39 to rotate, so that the infrared detector 39 turns to face the thermoplastic part, so that the infrared detector 39 detects the distance between the infrared detector 39 and the positioning top plate 36 and the top of the thermoplastic part, thereby assisting in determining whether the relative heights of the two sides of the thermoplastic part are consistent.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermoplastic butt welding device, comprising a body (1), a welding mechanism (2) arranged on the body (1), and an auxiliary mechanism (3) arranged on the body (1), characterized in that: The welding mechanism (2) comprises a lower mold (21) and an upper mold (28), wherein the lower mold (21) is fixedly mounted on the machine body (1), and the upper mold (28) is movably mounted on the machine body (1), wherein the lower mold (21) is located directly below the upper mold (28), and the lower mold (21) is matched with the upper mold (28), so that the upper mold (28) and the lower mold (21) respectively carry thermoplastic parts and abut against each other for welding; The auxiliary mechanism (3) comprises a positioning bottom plate (34) and a positioning top plate (36); the positioning bottom plate (34) is movably arranged on the machine body (1); the two positioning bottom plates (34) are symmetrically distributed on both sides of the lower mold (21); the positioning top plate (36) is movably arranged on the machine body (1); the two positioning top plates (36) are symmetrically distributed on both sides of the lower mold (21); the positioning top plate (36) is adjacent to the positioning bottom plate (34); and the positioning bottom plate (34) is located between the lower mold (21) and the positioning top plate (36); After the lower mold (21) and the upper mold (28) carry the thermoplastic part and abut against each other, the positioning bottom plate (34) is lifted to abut against the bottom end of the thermoplastic part and limit the side of the thermoplastic part, and the positioning top plate (36) is rotated to abut against the top end of the thermoplastic part, so that the positioning bottom plate (34) and the positioning top plate (36) control the fixed distance between the top and bottom ends of the thermoplastic part.

2. A thermoplastic butt welding device according to claim 1, characterized in that: The welding mechanism (2) further comprises a positioning ring (22), a plurality of the positioning rings (22) are fixedly mounted at the top end of the machine body (1), the positioning rings (22) are symmetrically distributed on both sides of the upper mold (28), the positioning rings (22) are slidably fitted with a first rack (23), the first rack (23) passes through the positioning rings (22), the positioning rings (22) are rotatably fitted with a first gear (24), the first gear (24) is meshed with the first rack (23), a stepping motor (25) is fixedly mounted at the top end of the machine body (1), and the stepping motor (25) is power-connected to the first gear (24).

3. A thermoplastic butt welding device according to claim 2, characterized in that: A connecting frame (26) is provided in the machine body (1), the top end of the connecting frame (26) is fixedly connected to the bottom end of the first rack (23), a plurality of telescopic rods (27) are fixedly installed at the bottom end of the connecting frame (26), and the bottom ends of the telescopic rods (27) are fixedly connected to the upper mold (28).

4. A thermoplastic butt welding device according to claim 3, characterized in that: The telescopic rods (27) are sleeved with springs (29), the top ends of the springs (29) are connected to the connecting frame (26), and the bottom ends of the springs (29) are connected to the upper mold (28). The elastic force of the springs (29) is greater than the gravity of the upper mold (28), so that when the upper mold (28) carries the thermoplastic part, the total gravity of the upper mold (28) and the thermoplastic part cannot cause the springs (29) to deform.

5. The thermoplastic butt welding equipment according to claim 4, characterized in that: A positioning slot rod (210) is fixedly installed in the machine body (1), and the positioning slot rod (210) is adjacent to the lower mold (21). A positioning plug rod (211) is fixedly installed at the bottom end of the connecting frame (26), and the positioning plug rod (211) is adjacent to the upper mold (28). The positioning plug rod (211) is located directly above the positioning slot rod (210), and the positioning plug rod (211) is adapted to the positioning slot rod (210).

6. The thermoplastic butt welding equipment according to claim 5, characterized in that: A second rack (212) is fixedly mounted in the machine body (1); the second rack (212) is adjacent to a welding position between the lower mold (21) and the upper mold (28); the second rack (212) is located between the upper mold (28) and the lower mold (21); a servo motor (213) is slidably mounted on the second rack (212); a second gear (214) is fixedly mounted on the shaft of the servo motor (213); the second gear (214) is meshed with the second rack (212); a welding arm (215) is fixedly mounted on the servo motor (213); the welding arm (215) is a multi-stage rotatable structure; after the welding arm (215) is abutted against the thermoplastic part, two ends of the welding arm (215) respectively abut against two sides of the thermoplastic part for welding.

7. The thermoplastic butt welding equipment according to claim 6, characterized in that: The auxiliary mechanism (3) further comprises a triggering member (31), the triggering member (31) being fixedly mounted on the positioning rod (211), and the detecting member (32) being fixedly mounted on the positioning slot rod (210), the triggering member (31) being located directly above the detecting member (32), and when the positioning rod (211) and the positioning slot rod (210) are in contact with each other, the triggering member (31) and the detecting member (32) are in contact with each other, so that the triggering member (31) triggers the detecting member (32) to generate a control signal.

8. The thermoplastic butt welding equipment according to claim 7, characterized in that: A plurality of electrically controlled telescopic rods (33) are fixedly installed in the machine body (1), the electrically controlled telescopic rods (33) all penetrate the wall surface of the machine body (1), the electrically controlled telescopic rods (33) are symmetrically distributed on both sides of the lower mold (21), the electrically controlled telescopic rods (33) are all located directly below the positioning base plate (34), the electrically controlled telescopic rods (33) are all fixedly connected to the positioning base plate (34), a plurality of rotating arm cylinders (35) are fixedly installed in the machine body (1), the rotating arm cylinders (35) are symmetrically distributed on both sides of the lower mold (21), each of the rotating arm cylinders (35) is dynamically connected to each of the positioning top plates (36), the detection component (32) is signal-connected to the electrically controlled telescopic rods (33), and the detection component (32) is signal-connected to the rotating arm cylinders (35).

9. The thermoplastic butt welding equipment according to claim 8, characterized in that: One side of the positioning top plate (36) is rotatably matched with a screw rod (37), and the screw rod (37) is sleeved with a ball nut (38). The ball nut (38) is threadedly connected to the screw rod (37), and the ball nut (38) is slidably matched with the positioning top plate (36). An infrared detector (39) is fixedly installed on the ball nut (38). The infrared detector (39) on one side generates an infrared detection line, and the infrared detector (39) on the other side receives the infrared detection line.

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