Defrost heater bending and correcting device

Abstract

The utility model relates to defrosting heater production and processing technical field discloses a kind of defrosting heater bending type correcting device, including case, fixed clamp holder, movable clamp holder, turnover support, turnover cylinder and piece cylinder, the fixed clamp holder and the piece cylinder are fixed on the case, the movable clamp holder is movably connected with the output shaft of piece cylinder by first transmission part, the first transmission part has the rotating portion for movable clamp holder circumferential rotation, the turnover support is fixed on the case outside movable clamp holder, the turnover cylinder is rotatably arranged on the turnover support, the movable clamp holder is movably connected with the output shaft of turnover cylinder by second transmission part, the fixed clamp holder is equipped with the first clamping groove for placing defrosting heater bending part, the movable clamp holder is equipped with the second clamping groove corresponding with the first clamping groove;The utility model replaces manual operation, improves type correcting efficiency while ensuring the machining consistency of product.

Description

Technical Field

[0001] This utility model relates to the field of defrost heater manufacturing and processing technology, and in particular to a defrost heater bending and straightening device. Background Technology

[0002] The defrost heater uses modified magnesium oxide as filler and stainless steel as shell. After shrinking the tube, the wiring terminals are sealed with special rubber compression and are bent according to the user's product requirements.

[0003] Among numerous products, the serpentine defrosting heater is the most widely used. It is formed by bending to create a triangular frame structure. The horizontal part of the frame structure has a first straight pipe section and a second straight pipe section arranged side by side. The outer ends of the two straight pipe sections are bent at 90° to form a terminal. In order to avoid the presence of heat accumulation areas in the heating areas of the two straight pipe sections during use, the above-mentioned bent defrosting heater needs to be calibrated. The common method is to use a special wrench and a limiting seat for processing. The limiting seat has a vertical slot, and the non-handled end of the wrench has a U-shaped groove. During operation, the bent part of the non-terminal end of the first straight pipe section is placed into the vertical slot. The wrench is used to hold the bent part of the non-terminal end of the second straight pipe section and bends it at a certain angle away from the first straight pipe section. Then, the bent part of the non-terminal end of the second straight pipe section is placed into the vertical slot, and the wrench is used to bend the bent part of its terminal end in the opposite direction until the terminal end of the second straight pipe section is parallel to the terminal end of the first straight pipe section. After calibration, there is a certain distance between the two straight pipe sections.

[0004] However, the above-mentioned traditional calibration method is manually operated, which is inefficient. Furthermore, the spacing of the straight pipe section after calibration has a large deviation due to human factors, resulting in poor consistency of this type of defrost heater product. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a defrosting heater bending and straightening device that replaces manual operation, improves straightening efficiency, and ensures product processing consistency.

[0006] The technical solution of this utility model is as follows: a defrosting heater bending and straightening device, including a housing, a fixed clamping seat, a movable clamping seat, a flipping bracket, a flipping cylinder, and a retraction cylinder. The fixed clamping seat and the retraction cylinder are fixed opposite to each other on the housing. The movable clamping seat is movably connected to the output shaft of the retraction cylinder via a first transmission member. Under the drive of the retraction cylinder, it moves closer to / away from the fixed clamping seat along the output shaft axis of the retraction cylinder. The first transmission member has a rotating part for the movable clamping seat to rotate circumferentially. The flipping bracket is fixed on the housing outside the movable clamping seat. The flipping cylinder is rotatably mounted on the flipping bracket along a direction parallel to the output shaft axis of the retraction cylinder. The movable clamping seat is movably connected to the output shaft of the flipping cylinder via a second transmission member. Under the drive of the flipping cylinder, it rotates around the rotating part. The fixed clamping seat is provided with a first slot for inserting the bent part of the defrosting heater, and the movable clamping seat is provided with a second slot corresponding to the first slot. The non-connection end bends of the two straight tube sections of the defrost heater are placed into the first and second slots respectively. The flipping cylinder drives the moving bracket to deflect by a set angle, so that the two straight tube sections of the defrost heater form a set interval distance. The ejection cylinder drives the moving bracket away from the fixed bracket, so that the defrost heater is disengaged from the moving bracket. After the double cylinders are reset, the two bends of the deflected straight tube sections are placed into the first and second slots respectively. The above operation is repeated so that the non-connection end bends of the straight tube sections deflect by the same angle relative to the connection end bends. At this time, the connection end of the straight tube section reaches a position parallel to the connection end of the other straight tube section, completing the bending and shaping of the defrost heater. The whole process is operated by two cylinders in cooperation. Compared with manual operation, the shaping efficiency is high. In mass production, since the rotation angle of the flipping cylinder is kept constant, the products of the same batch have a high degree of consistency.

[0007] A flipping frame is fixed on the side of the moving card seat away from the fixed card seat. A first rotating rod is fixed on the bottom inner side of the flipping frame. The first transmission component is a connecting sleeve fixed to the end of the output shaft of the ejector cylinder. After the first rotating rod extends out of the flipping frame, it rotates in cooperation with the axial through hole of the connecting sleeve. The axial through hole forms the rotating part. A limiting component is provided on the connecting sleeve to restrict the axial displacement of the first rotating rod and the connecting sleeve.

[0008] A second rotating rod is fixed to the inner top of the flipping frame. The second transmission component is a rotating sleeve fixed to the end of the output shaft of the flipping cylinder. The rotating sleeve is rotatably connected to the second rotating rod.

[0009] The limiting component includes a first retaining ring and a second retaining ring. A first annular groove and a second annular groove are respectively opened on the first rotating rods on both sides of the connecting sleeve. The first retaining ring cooperates with the first annular groove, and the second retaining ring cooperates with the second annular groove.

[0010] A sliding seat is fixed on the chassis. The sliding seat is located between the moving card seat and the ejector cylinder, and the sliding seat is provided with a sliding hole for the first rotating rod to pass through.

[0011] A guide seat is fixed on the chassis. The guide seat is located between the fixed card seat and the movable card seat, and the guide seat is provided with a guide groove for inserting the tube of the defrosting heater.

[0012] The tilting cylinder is an adjustable cylinder. An adjusting nut is threaded onto the adjusting screw of the adjustable cylinder. The adjusting nut is used to adjust the stroke of the output shaft of the adjustable cylinder, so that the stroke corresponds to the distance to be calibrated between the two straight sections of the defrost heater. By setting the adjustable cylinder, the deflection angle of the moving bracket can be changed, thereby adapting to different users' requirements for the spacing between the straight sections of the defrost heater.

[0013] The fixed card holder includes an upper card holder and a lower card holder. The lower card holder is fixed to the chassis, and the upper card holder is detachably installed on the lower card holder. The first card slot includes an upper card slot provided on the upper card holder and a lower card slot provided on the lower card holder.

[0014] The chassis is equipped with a control module, which includes a time relay, an intermediate relay, a first solenoid valve, and a second solenoid valve. The air path of the first solenoid valve is connected to the air source interface of the tilting cylinder, and the air path of the second solenoid valve is connected to the air source interface of the ejection cylinder. The coils of the time relay, the intermediate relay, the first solenoid valve, and the second solenoid valve are connected in parallel in the main circuit. The normally open contact of the intermediate relay is connected in series with the coil of the first solenoid valve, and the normally open contact of the time relay is connected in series with the coil of the second solenoid valve.

[0015] The control module also includes a first magnetic switch and a second magnetic switch. The first magnetic switch is a normally open magnetic switch, fixed on the cylinder body of the tilting cylinder. The normally open contact of the first magnetic switch is connected in series with the coil of the time relay. When the tilting cylinder is extended, the piston magnetic ring of the tilting cylinder engages with the first magnetic switch to sense the movement. The second magnetic switch is a normally closed magnetic switch, fixed on the cylinder body of the ejection cylinder. The normally closed contact of the second magnetic switch is connected in series with the main circuit. When the ejection cylinder is retracted, the piston magnetic ring of the ejection cylinder engages with the second magnetic switch to sense the movement.

[0016] In summary, the present invention has the following main advantages: This invention utilizes a tilting cylinder, a retraction cylinder, a moving clamp, and a fixed clamp. The non-connection bent portions of the two straight tube sections of the defrost heater are placed into the first groove of the fixed clamp and the second groove of the moving clamp, respectively. The tilting cylinder rotates the moving clamp by a certain angle, creating a predetermined gap between the two straight tube sections of the defrost heater. The retraction cylinder moves the moving clamp away from the fixed clamp, disengaging the defrost heater from the moving clamp. After both cylinders reset, the two bent portions of the deflected straight tube sections are placed back into the first and second grooves, respectively. This process is repeated until the non-connection bent portions of the straight tube sections are tilted by the same angle relative to the connection bent portions. At this point, the connection end of the straight tube section reaches a position parallel to the connection end of the other straight tube section, completing the bending and shaping of the defrost heater. The entire process is operated by two cylinders, resulting in higher shaping efficiency compared to manual operation. Furthermore, in mass production, the constant rotation angle of the tilting cylinder ensures high consistency within the same batch of products. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the present invention in its initial state; Figure 2 This is a schematic diagram of the structure of the tilting cylinder after it has been activated in this utility model; Figure 3 This is a schematic diagram of the structure of the retracting cylinder after it has been activated in this utility model; Figure 4 This is a schematic diagram of the structure of this utility model after resetting; Figure 5 This is a cross-sectional schematic diagram of the operation of this utility model; Figure 6 This is a schematic diagram of the moving card holder and the flipping frame in this utility model; Figure 7 This is a structural diagram of the upper card slot in this utility model. Figure 8 yes Figure 1 Larger image of part A in the middle; Figure 9 yes Figure 1 A magnified view of part B in the image; Figure 10 This is a circuit connection diagram of the control module in this utility model; Figure 11 This is a structural diagram of the defrost heater in the calibration process of this utility model, wherein, Figure 11 (a) is a structural diagram of the defrost heater in its initial state. Figure 11 (b) is a structural diagram of the first straight pipe section of the defrost heater after it has been deflected relative to the second straight pipe section. Figure 11 (c) is a structural diagram of the non-connection end bend of the first straight tube section of the defrost heater after it is deflected relative to the connection end bend. Figure 12 This is a side view of the defrost heater after calibration in this utility model.

[0018] Reference numerals: 100, Defrosting heater; 101, First straight pipe section; 102, Second straight pipe section; 103, Terminal; 104, First bend; 105, Second bend; 106, Third bend; 1, Chassis; 2, Fixed bracket; 201, Lower bracket; 202, Upper bracket; 203, Snap-fit ​​post; 204, First slot; 205, Snap-fit ​​hole; 3, Moving bracket; 301, Flip frame; 302, First rotating rod; 3021, First annular groove; 3022, Second annular groove; 303, Second... 304. Rotating rod; 305. Second slot; 306. Resin pad; 4. Part ejection cylinder; 401. Cylinder mounting seat; 402. Second magnetic switch; 403. Second solenoid valve; 5. Tilting cylinder; 501. Tilting seat; 502. First magnetic switch; 503. First solenoid valve; 504. Adjusting screw; 505. Adjusting nut; 6. Tilting bracket; 7. Connecting sleeve; 701. First snap ring; 702. Second snap ring; 8. Rotating sleeve; 9. Guide seat; 901. Guide groove; 10. Sliding seat; 11. Pipe clamp. Detailed Implementation

[0019] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Furthermore, in this utility model, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly based on the orientation of the components in the accompanying drawings.

[0022] like Figures 1-4 As shown, this utility model provides a bending and straightening device for a defrosting heater, including a housing 1, a fixed clamping seat 2, a movable clamping seat 3, a flipping bracket 6, a flipping cylinder 5, and a part-removing cylinder 4. The fixed clamping seat 2 and the part-removing cylinder 4 are fixed to the housing 1 facing each other, as detailed below. Figure 2As shown, the card holder is fixed on the left side of the chassis 1, and the cylinder body of the ejector cylinder 4 is fixed on the right side of the chassis 1 via the cylinder mounting seat 401. Its output shaft is set towards the fixed card holder 2. The movable card holder 3 is movably connected to the output shaft of the ejector cylinder 4 via the first transmission component. Under the drive of the ejector cylinder 4, it moves closer to / away from the fixed card holder 2 along the axis of the output shaft of the ejector cylinder 4. Furthermore, the first transmission component has a rotating part for the movable card holder 3 to rotate circumferentially. The flipping bracket 6 is fixed on the chassis 1 outside the movable card holder 3. The flipping cylinder 5 is rotatably mounted on the flipping bracket 6 in a direction parallel to the axis of the output shaft of the ejector cylinder 4. Specifically, as shown... Figure 1 As shown, a tilting seat 501 is fixed at the front end of the cylinder body of the tilting cylinder 5. The tilting seat 501 has rotating shafts formed at both ends that rotate with the tilting bracket 6. The moving seat 3 is movably connected to the output shaft of the tilting cylinder 5 via a second transmission component and rotates around the rotating part under the drive of the tilting cylinder 5. The fixed seat 2 is provided with a first slot 204 for inserting the bent part of the defrosting heater 100, and the moving seat 3 is provided with a second slot 304 corresponding to the first slot 204.

[0023] like Figure 1 As shown, the bent portions of the non-connection ends 103 of the two straight pipe sections of the defrost heater 100 are respectively inserted into the first slot 204 and the second slot 304, i.e. Figure 11 As shown in (a), the first bent portion 104 of the second straight tube 102 is inserted into the first slot 204, and the second bent portion 105 of the first straight tube 101 is inserted into the second slot 304. The flipping cylinder 5 drives the card holder 3 to deflect by a set angle, as shown in (a). Figure 2 As shown, a predetermined interval distance is formed between the first straight pipe section 101 and the second straight pipe section 102 of the defrost heater 100, such as... Figure 3 As shown, the ejector cylinder 4 drives the movable retainer 3 away from the fixed retainer 2, so that the defrost heater 100 disengages from the movable retainer 3. After the double cylinders reset, as shown... Figure 4 As shown, the two bent portions of the deflected straight tube are then placed into the first slot 204 and the second slot 304 respectively, i.e. Figure 11 As shown in (b), the third bend 106 of the first straight tube 101 is inserted into the first slot 204, and the second bend 105 of the first straight tube 101 is inserted into the second slot 304. This operation is repeated until the second bend 105 of the first straight tube 101 is deflected by the same angle relative to the third bend 106. At this time, the terminal 103 of the first straight tube 101 reaches a position parallel to the terminal 103 of the second straight tube 102. Figure 11As shown in (c), the bending and shaping of the defrosting heater 100 is completed. The entire process is carried out by the coordinated operation of two cylinders, which replaces the traditional manual shaping, greatly improving the shaping efficiency. In mass production, since the rotation angle of the flipping cylinder 5 is kept consistent, the products in the same batch have a high degree of consistency after shaping.

[0024] To achieve effective control of the tilting cylinder 5 and the ejection cylinder 4, a control module is provided inside the housing 1. This control module includes a time relay, an intermediate relay, a first solenoid valve 503, a second solenoid valve 403, a first magnetic switch 502, and a second magnetic switch 402. The first magnetic switch 502 is a normally open magnetic switch. Figure 2 As shown, the first magnetic switch 502 is fixed on the cylinder body of the tilting cylinder 5. When the tilting cylinder 5 is extended, the piston magnetic ring of the tilting cylinder 5 engages with the first magnetic switch 502 to sense the movement. The second magnetic switch 402 is a normally closed magnetic switch, such as... Figure 2 As shown, the second magnetic switch 402 is fixed on the cylinder body of the ejection cylinder 4. When the ejection cylinder 4 is in the retracted state, the piston magnetic ring of the ejection cylinder 4 engages with the second magnetic switch 402 for sensing; as... Figure 3 As shown, the air path of the first solenoid valve 503 is connected to the air source interface of the tilting cylinder 5, and the air path of the second solenoid valve 403 is connected to the air source interface of the ejection cylinder 4. In this scheme, both the tilting cylinder 5 and the ejection cylinder 4 are double-acting cylinders. Therefore, the first solenoid valve 503 used to drive the tilting cylinder 5 and the second solenoid valve 403 used to drive the ejection cylinder 4 are two-position five-way solenoid valves. Figure 10As shown, the coil SJ1 of the time relay, the coil J1 of the intermediate relay, the coil VA of the first solenoid valve 503, and the coil VB of the second solenoid valve 403 are connected in parallel in the main power supply circuit. The normally open contact J1-1 of the intermediate relay is connected in series with the coil VA of the first solenoid valve 503, the normally open contact SJ1-1 of the time relay is connected in series with the coil VB of the second solenoid valve 403, the normally open contact SQ1 of the first magnetic switch 502 is connected in series with the coil SJ1 of the time relay, and the normally closed contact SQ2 of the second magnetic switch 402 is connected in series with the main power supply circuit. More preferably, a foot switch JT is used to switch the main power supply circuit on and off. Another normally open contact J1-2 of the intermediate relay is connected in series with the foot switch JT. When the foot switch JT is pressed, the coil J1 of the intermediate relay is energized, and the two normally open contacts J1-2... When J1-1 and J1-2 are closed, the branch containing the coil VA of the first solenoid valve 503 is energized. The tilting cylinder 5 extends until the piston magnetic ring senses the first magnetic switch 502. The normally open contact SQ1 of the first magnetic switch 502 closes, and the branch containing the coil SJ1 of the time relay is energized. After a delay of 2-3 seconds (effectively deflecting the first straight tube 101), the normally open contact SJ1-1 of the time relay closes, and the branch containing the coil VB of the second solenoid valve 403 is energized. The retraction cylinder 4 retracts until the piston magnetic ring senses the second magnetic switch 402. The normally closed contact SQ2 of the second magnetic switch 402 opens, the main circuit is de-energized, and the coils VA and VB of the first and second solenoid valves 503 are de-energized. This causes the tilting cylinder 5 to retract and reset, and the retraction cylinder 4 to extend and reset, completing one deflection operation of the bending and straightening.

[0025] like Figure 6 As shown, a flip frame 301 is fixed on the side of the movable card holder 3 away from the fixed card holder 2, and a first rotating rod 302 is fixed on the inner bottom side of the flip frame 301. Figure 9 As shown, the first transmission component is a connecting sleeve 7 fixed to the end of the output shaft of the ejector cylinder 4. The first rotating rod 302 extends out of the flipping frame 301 and rotates in conjunction with the axial through hole of the connecting sleeve 7. The axial through hole forms the aforementioned rotating part. To allow the movable chuck 3 to move back and forth with the ejector cylinder 4, the connecting sleeve 7 is provided with a limiting component to restrict the axial displacement between the first rotating rod 302 and the connecting sleeve 7. A second rotating rod 303 is fixed to the inner top of the flipping frame 301, as shown... Figure 2As shown, the second transmission component is a rotating sleeve 8 fixed to the end of the output shaft of the tilting cylinder 5. The rotating sleeve 8 is rotatably connected to the second rotating rod 303. Preferably, the distance that the rotating sleeve 8 is allowed to move on the second rotating rod 303 is not less than the stroke of the output shaft of the ejection cylinder 4. That is, in the initial state (extended state) of the ejection cylinder 4, the distance between the end face of the rotating sleeve 8 facing the moving card seat 3 and the inner wall of the tilting frame 301 opposite it is the distance that the rotating sleeve 8 is allowed to move on the second rotating rod 303.

[0026] Further preferred, such as Figure 6 and Figure 9 As shown, the limiting component includes a first retaining ring 701 and a second retaining ring 702. The first rotating rods 302 on both sides of the connecting sleeve 7 are respectively provided with a first annular groove 3021 and a second annular groove 3022. The first retaining ring 701 cooperates with the first annular groove 3021, and the second retaining ring 702 cooperates with the second annular groove 3022. By limiting the front side of the first retaining ring 701, it is ensured that the moving retaining seat 3 moves together with the output shaft of the ejection cylinder 4 in the direction close to the fixed retaining seat 2. By limiting the rear side of the second retaining ring 702, it is ensured that the moving retaining seat 3 moves together with the output shaft of the ejection cylinder 4 in the direction away from the fixed retaining seat 2.

[0027] Further preferred, such as Figure 9 As shown, a sliding seat 10 is fixed on the chassis. The sliding seat 10 is located between the moving bracket 3 and the ejector cylinder 4. The sliding seat 10 is provided with a sliding hole for the first rotating rod 302 to pass through. The sliding seat 10 and the first rotating rod 302 slide together to improve the stability of the first rotating rod 302 moving axially with the output shaft of the ejector cylinder 4. Preferably, the end face of the sliding seat 10 is parallel to the end face of the rotating sleeve 8 so that the distance that the sliding seat 10 is allowed to move on the first rotating rod 302 is the same as the distance that the rotating sleeve 8 is allowed to move on the second rotating rod 303.

[0028] like Figure 1 and Figure 8 As shown, a guide seat 9 is fixed on the chassis. The guide seat 9 is located between the fixed clamping seat 2 and the movable clamping seat 3, and the guide seat 9 is provided with a guide groove 901 for inserting the tube of the defrost heater 100. More preferably, the guide groove 901 is a semi-cylindrical groove, and a pipe clamp 11 is fixed to one end of the guide seat 9. The center of the inner ring surface of the pipe clamp 11 coincides with the axis of the guide groove 901, which temporarily fixes the defrost heater 100 placed on the device, preventing the defrost heater 100 from detaching from the chassis 1 table surface when the retraction cylinder 4 is in the retraction action. Moreover, the temporary fixation by the pipe clamp 11 facilitates the removal of the defrost heater 100 after one deflection operation.

[0029] Further preferred, such as Figure 5As shown, the tilting cylinder 5 is an adjustable cylinder. Specifically, an adjusting nut 505 is threaded onto the adjusting screw 504 of the adjustable cylinder. The adjusting nut 505 is used to adjust the stroke of the output shaft of the adjustable cylinder so that the stroke corresponds to the distance to be calibrated between the two straight pipe sections of the defrosting heater 100; specifically, as shown... Figure 12 The deflection angle α is calculated based on the user's requirement for the distance D between the first straight tube section 101 and the second straight tube section 102 of the defrost heater 100, combined with the dimensions of the defrost heating tube. Figure 5 As shown, when the tilting cylinder 5 is in the retracted state, the tilting frame 301 is set perpendicular to the surface of the housing 1, and the output shaft of the tilting cylinder 5 is set perpendicular to the tilting frame 301. At this time, the vertical height H between the center of the rotating shaft of the tilting seat 501 and the center of the first rotating rod 302 is determined. This height is also equal to the distance between the center of the first rotating rod 302 and the center of the second rotating rod 303. The distance L1 between the center of the rotating shaft of the tilting seat 501 and the center of the second rotating rod 303 in the retracted state of the tilting cylinder 5 is determined. The distance L2 between the center of the rotating shaft of the tilting seat 501 and the center of the second rotating rod 303 in the extended state of the reverse-mounted cylinder is calculated using the coordinate formula. The coordinate formula is as follows: The difference between L2 and L1 is the output shaft stroke of the adjustable cylinder adjusted by adjusting nut 505. By adjusting the above stroke, the deflection angle of the moving bracket 3 is changed, thereby adapting to the different users' requirements for the straight pipe spacing of the defrost heater 100.

[0030] like Figure 4 As shown, since the height of the third bend 106 is higher than the height of the first bend 104 when the same defrost heater 100 is deflected twice, in order to effectively place and block the two bends during both deflection operations, and to quickly remove the bends after the deflection operation, it is further preferred that the fixed bracket 2 includes an upper bracket 202 and a lower bracket 201. The lower bracket 201 is fixed to the housing 1, and the upper bracket 202 is detachably installed on the lower bracket 201. In this solution, the upper bracket 202 and the lower bracket 201 are detachably connected by a locking post 203 and a locking hole 205. Figure 3 As shown, the surface of the lower card holder 201 is formed with a snap-fit ​​post 203, such as Figure 7 As shown, the upper card holder 202 has a card-attaching hole 205 at its bottom. In other embodiments, a card-attaching hole 205 can also be formed on the lower card holder 201, and a card-attaching post 203 can be formed at the bottom of the upper card holder 202. The upper card slot on the upper card holder 202 and the lower card slot on the lower card holder 201 both constitute the first card slot 204, as shown. Figures 1-3 As shown, during the first deflection operation, only the lower slot of the lower card holder 201 is used as the first card slot 204, as follows: Figure 4As shown, during the second deflection operation, the upper card holder 202 is inserted into the lower card holder 201. At this time, the upper card slot of the upper card holder 202 serves as the first card slot 204. To prevent the defrosting heater 100 from being scratched, a U-shaped resin pad 305 can be fixedly installed in the movable card holder 3, the upper card holder 202, and the lower card holder 201.

[0031] When implementing the above technical solution, turn on the power switch and air supply switch of the chassis 1. The tilting cylinder 5 is in the initial retracted state, and the ejection cylinder 4 is in the initial extended state. Adjust the position of the adjusting nut 505 of the tilting cylinder 5 according to the calibration dimensions required by the user, so that... Figure 11 (a) The first bent portion 104 and the second bent portion 105 at both ends of the defrost heater 100 to be calibrated are respectively placed in the lower slot and the second slot 304. The tube body at the bottom is located in the guide groove 901. The first straight tube portion 101 adjacent to the first bent portion 104 is placed outside the lower slot 201, and the second straight tube portion 102 adjacent to the second bent portion 105 is placed outside the moving slot 3. When the foot switch is pressed, the flip cylinder 5 and the ejection cylinder 4 are activated in sequence. The second bent portion 105 deflects relative to the first bent portion 104, and the defrost heater 100 is processed as follows. Figure 11 (b) In this structure, the upper retainer 202 is snapped onto the lower retainer 201, and the third bend 106 is placed in the upper retainer groove, while the second bend 105 remains in the second retainer groove 304. Pressing the foot switch activates the flip cylinder 5 and the ejector cylinder 4 sequentially, causing the second bend 105 to deflect relative to the third bend 106. The defrost heater 100 is then processed as follows: Figure 11 (c) In this structure, the two terminals 103 are parallel to each other, the first straight pipe section 101 and the second straight pipe section 102 have a calibration interval, the entire calibration process is simple to operate, the calibration efficiency is high, and the calibration consistency of the defrosting heaters 100 in the same batch is high.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A defrosting heater bending and straightening device, characterized in that, The device includes a chassis, a fixed mounting base, a movable mounting base, a tilting bracket, a tilting cylinder, and a retraction cylinder. The fixed mounting base and the retraction cylinder are fixed to the chassis facing each other. The movable mounting base is movably connected to the output shaft of the retraction cylinder via a first transmission member. Driven by the retraction cylinder, the movable mounting base moves closer to / away from the fixed mounting base along the axis of the output shaft of the retraction cylinder. The first transmission member has a rotating part for the movable mounting base to rotate circumferentially. The tilting bracket is fixed to the chassis outside the movable mounting base. The tilting cylinder is rotatably mounted on the tilting bracket in a direction parallel to the axis of the output shaft of the retraction cylinder. The movable mounting base is movably connected to the output shaft of the tilting cylinder via a second transmission member. Driven by the tilting cylinder, the movable mounting base rotates around the rotating part. The fixed mounting base has a first slot for inserting the bent part of the defrosting heater, and the movable mounting base has a second slot corresponding to the first slot.

2. The defrosting heater bending and straightening device according to claim 1, characterized in that, A flipping frame is fixed on the side of the moving card seat away from the fixed card seat. A first rotating rod is fixed on the bottom inner side of the flipping frame. The first transmission component is a connecting sleeve fixed to the end of the output shaft of the ejector cylinder. After the first rotating rod extends out of the flipping frame, it rotates in cooperation with the axial through hole of the connecting sleeve. The axial through hole forms the rotating part. A limiting component is provided on the connecting sleeve to restrict the axial displacement of the first rotating rod and the connecting sleeve.

3. The defrosting heater bending and straightening device according to claim 2, characterized in that, A second rotating rod is fixed to the inner top of the flipping frame. The second transmission component is a rotating sleeve fixed to the end of the output shaft of the flipping cylinder. The rotating sleeve is rotatably connected to the second rotating rod.

4. A defrosting heater bending and straightening device according to claim 2 or 3, characterized in that, The limiting component includes a first retaining ring and a second retaining ring. A first annular groove and a second annular groove are respectively opened on the first rotating rods on both sides of the connecting sleeve. The first retaining ring cooperates with the first annular groove, and the second retaining ring cooperates with the second annular groove.

5. A defrosting heater bending and straightening device according to claim 2 or 3, characterized in that, A sliding seat is fixed on the chassis. The sliding seat is located between the moving card seat and the ejector cylinder, and the sliding seat is provided with a sliding hole for the first rotating rod to pass through.

6. A defrosting heater bending and straightening device according to any one of claims 1-3, characterized in that, A guide seat is fixed on the chassis. The guide seat is located between the fixed card seat and the movable card seat, and the guide seat is provided with a guide groove for inserting the tube of the defrosting heater.

7. A defrosting heater bending and straightening device according to any one of claims 1-3, characterized in that, The tilting cylinder is an adjustable cylinder. An adjusting nut is threaded onto the adjusting screw of the adjustable cylinder. The adjusting nut is used to adjust the stroke of the output shaft of the adjustable cylinder so that the stroke corresponds to the calibration distance between the two straight pipe sections of the defrost heater.

8. A defrosting heater bending and straightening device according to any one of claims 1-3, characterized in that, The fixed card holder includes an upper card holder and a lower card holder. The lower card holder is fixed to the chassis, and the upper card holder is detachably installed on the lower card holder. The first card slot includes an upper card slot provided on the upper card holder and a lower card slot provided on the lower card holder.

9. A defrosting heater bending and straightening device according to any one of claims 1-3, characterized in that, The chassis is equipped with a control module, which includes a time relay, an intermediate relay, a first solenoid valve, and a second solenoid valve. The air path of the first solenoid valve is connected to the air source interface of the tilting cylinder, and the air path of the second solenoid valve is connected to the air source interface of the ejection cylinder. The coils of the time relay, the intermediate relay, the first solenoid valve, and the second solenoid valve are connected in parallel in the main circuit. The normally open contact of the intermediate relay is connected in series with the coil of the first solenoid valve, and the normally open contact of the time relay is connected in series with the coil of the second solenoid valve.

10. A defrosting heater bending and straightening device according to claim 9, characterized in that, The control module also includes a first magnetic switch and a second magnetic switch. The first magnetic switch is a normally open magnetic switch, fixed on the cylinder body of the tilting cylinder. The normally open contact of the first magnetic switch is connected in series with the coil of the time relay. When the tilting cylinder is extended, the piston magnetic ring of the tilting cylinder engages with the first magnetic switch to sense the movement. The second magnetic switch is a normally closed magnetic switch, fixed on the cylinder body of the ejection cylinder. The normally closed contact of the second magnetic switch is connected in series with the main circuit. When the ejection cylinder is retracted, the piston magnetic ring of the ejection cylinder engages with the second magnetic switch to sense the movement.

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