An apparatus for producing a nickel-chromium electric heating strip

Abstract

The present application relates to the technical field of electric heating strip, specifically to a production equipment for nickel-chromium electric heating strip, comprising a placing table, a clamping unit, a processing table and a straightening mechanism, the clamping unit comprises an arc-shaped plate, and the arc-shaped plate is slidably arranged on the front and back of the two vertical sections of the placing table. The clamping process of the two arc-shaped plates determines the axis direction of one end of the electric heating strip, and the subsequent straightening direction is determined based on this. The multiple locking blocks achieve multi-point locking of the pitch section of the electric heating strip, and lock the pitch of the electric heating strip. In addition, the right two straightening rollers clamp and lock the starting point of the straightening section. In summary, the spiral characteristics and pitch of the spiral section are locked, avoiding the problem that the spiral section of the electric heating strip deforms during straightening, causing it to be unusable.

Description

Technical Field

[0001] The invention relates to the technical field of electric heating strips, in particular to production equipment for nickel-chromium electric heating strips. Background Art

[0002] Nickel-chromium electric heating strips are a common type of electric heating element, widely used in various industrial and civilian equipment that require heating. Usually, nickel-chromium alloy wire is wound into a spiral shape (similar to a spring) and then embedded or wrapped in an insulating and heat-resistant material. In order to ensure a reliable electrical connection, the two ends of the electric heating strip need to be welded to the lead-out rod. However, the end of the threaded structure of the wound electric heating strip is in a bent state and cannot directly achieve stable and sufficient contact with the straight metal lead-out rod, which means that it is difficult to directly weld it.

[0003] In summary, straightening one end of the electric heating strip after winding is a key step, see Figure 6 At present, manual straightening is usually performed by gradual hammering or stretching, or existing straightening equipment is used to straighten one end of the electric heating strip by stretching or rolling.

[0004] The following problems exist in the current straightening process mentioned above: During stretching or roller straightening, stress will be transmitted to the root of the spiral section of the electric heating strip through the wire, which may easily cause two deformation problems: the pitch of the electric heating strip is enlarged and the spiral feature collapses, resulting in the final quality of the electric heating strip being reduced. Although there is an existing technology for maintaining the pressure of the spiral features of the electric heating strip after processing, the spiral features of the electric heating strip cannot be controlled and protected during the current straightening process. Summary of the Invention

[0005] Based on this, it is necessary to provide a production equipment for nickel-chromium electric heating strips, aiming to solve the problems of the above-mentioned prior art.

[0006] The present application provides a production device for nickel-chromium electric heating strips, including: a placement table, on which a clamping unit for clamping the electric heating strip is provided, the clamping unit includes an arc-shaped plate, and arc-shaped plates are provided on two vertical sections of the placement table for sliding back and forth, and the two arc-shaped plates are symmetrical front and back. The two arc-shaped plates are fitted with the electric heating strip to determine the axial position of the electric heating strip and clamp the electric heating strip.

[0007] The clamping unit also includes a locking block. A plurality of locking blocks are arranged equidistantly from left to right on the arc plate for sliding back and forth. After the arc plate is attached to the electric heating strip, the locking block locks the electric heating strip to the corresponding arc plate through multi-point locking, thereby locking the pitch of the electric heating strip.

[0008] A processing table is fixedly provided on the left side of the placement table, and a straightening unit is provided on the processing table. The straightening unit includes a laminating frame. Two laminating frames symmetrical in front and back sliding are provided on the processing table, and two straightening rollers distributed left and right are provided on the laminating frame.

[0009] The processing table is provided with a driving unit, which is used to control the degree of contact between the two straightening rollers facing each other and the electric heating strip, and at the same time drive the two straightening rollers facing each other on the left side to move left for straightening operation.

[0010] The straightening roller on the right is in contact with the electric heating strip to determine the position of the straightening section, and the two straightening rollers on the left are in contact with the heating strip and then moved left to straighten the heating strip.

[0011] According to a favorable embodiment, the vertical sections of the placement table slide back and forth and are penetrated by multiple sliding rods distributed left and right and with axes extending from front to back. The arc plate is fixed on all the sliding rods on the same side, and the placement table is provided with an electric push rod for driving the sliding rods to move back and forth.

[0012] The laminating frame is U-shaped and the U-shaped openings of the two laminating frames are opposite to each other. Two rotating columns distributed left and right are provided on the laminating frame. The right rotating column is fixed up and down and passes through the laminating frame. The left rotating column is slid left and right on the laminating frame. The straightening roller is rotatably sleeved on the corresponding rotating column.

[0013] According to a favorable embodiment, limit plates are fixedly provided on the left and right sides of the curved plate, and adjustment frames are provided on the two vertical sections of the placement table for sliding back and forth. A reference plate is fixedly provided on the adjustment frame to prevent excessive movement of the curved plate by blocking the limit plates.

[0014] According to a favorable embodiment, the left and right end surfaces of the two vertical sections of the placement table are movably connected with locking pins, and a plurality of adjustment holes for adjusting the position of the reference plate are opened through the adjustment frame, and the front and rear positions of the reference plate are locked by inserting the locking pins into the corresponding adjustment holes.

[0015] According to a favorable embodiment, the clamping unit also includes a transverse frame, which is provided on multiple sliding rods on the same side to slide back and forth together. A push rod is fixed on the transverse frame to slide back and forth and pass through adjacent arc plates, and a locking block is fixed on the push rod.

[0016] According to a favorable embodiment, the locking block is U-shaped and its U-shaped opening faces the opposite arc plate, the U-shaped area of ​​the locking block fits with the electric heating strip, all the locking blocks on the front transverse frame and all the locking blocks on the rear transverse frame are staggered left and right, and the distance between two adjacent locking blocks on the left and right is the same as the pitch of the electric heating strip.

[0017] According to a preferred embodiment, plug-in posts with axes extending from front to back are fixedly provided on the end surfaces of the two longitudinal sections of the locking block facing the opposite curved plates, and the curved plates are provided with plug-in slots corresponding to the plug-in posts.

[0018] When the locking block locks the electric heating strip to the arc-shaped plate, the electric heating strip is locked at multiple points by inserting the plug-in columns into the corresponding plug-in slots, ensuring that the electric heating strip maintains its original pitch during the straightening operation.

[0019] According to a favorable embodiment, two left-right distributed mounting blocks are fixedly provided on the upper and lower end surfaces of the front laminating frame, and docking rods with axes extending from front to back are fixedly provided on the rear end surfaces of the mounting blocks. Docking blocks corresponding to the docking rods are fixedly provided on the rear laminating frame. When the two laminating frames are closed to mate the straightening sections of the electric heating strips, the docking rods pass through the corresponding docking blocks.

[0020] According to an advantageous embodiment, the driving unit includes a reference plate, and two reference blocks distributed left and right are provided on the processing table, the right reference block is fixedly provided on the processing table, and the left reference block is slidably provided on the reference plate.

[0021] The upper end surface of the reference block is provided with two front-to-back symmetrical slots. When the laminating frame drives the straightening roller to approach the heating strip, the lower end portion of the rotating column moves into the corresponding slots.

[0022] According to an advantageous embodiment, the drive unit further comprises a pad, and a plurality of pads are placed in the slot so as to fit tightly from front to back. The distance between the front and rear relative rotating columns can be adjusted by adding and placing the required number of pads.

[0023] In summary, the present invention includes at least one of the following beneficial effects: 1. In the present invention, the axis direction of the electric heating strip is determined by the clamping process of the two arc-shaped plates, and the subsequent straightening direction is determined based on this, and the multi-point locking of the pitch segment of the electric heating strip is achieved through multiple locking blocks, the pitch of the electric heating strip is locked, and the starting point of the straightening segment is clamped and locked by the two straightening rollers on the right. In summary, the spiral characteristics and pitch of the spiral segment are locked, avoiding the problem of deformation of the spiral segment of the electric heating strip during the straightening process, resulting in unusable problems.

[0024] 2. In the present invention, the reference plate is used to limit the excessive displacement of the arc plate, thereby avoiding the problem of deformation and damage of the electric heating strip caused by the excessive displacement of the arc plate and squeezing the electric heating strip. At the same time, it also ensures the initial positioning and clamping accuracy of the two arc plates on the electric heating strip.

[0025] Secondly, by adding a set number of spacers, the front-to-back distance between the two straightening rollers facing each other is controlled to avoid excessive movement of the straightening rollers caused by the laminating frame during the forward and backward movement of the laminating frame, which may cause deformation of the electric heating strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a production device for nickel-chromium electric heating strips provided according to an embodiment of the present invention is shown.

[0028] Figure 2 A schematic diagram of a partial explosion structure between the arc plate, the locking block and the adjustment frame provided according to an embodiment of the present invention is shown.

[0029] Figure 3 A schematic diagram of a partial explosion structure between an arc-shaped plate, a locking block and a plug-in column provided according to an embodiment of the present invention is shown.

[0030] Figure 4 A schematic diagram of the explosion structure between the laminating frame, the straightening roller and the docking rod provided according to an embodiment of the present invention is shown.

[0031] Figure 5 A schematic diagram of the local structure among the laminating frame, straightening rollers and reference blocks provided according to an embodiment of the present invention is shown.

[0032] Figure 6 A schematic diagram showing the changes before and after processing of an electric heating strip provided by an embodiment of the present invention is shown.

[0033] Among them, the above-mentioned drawings include the following figure marks: 1. placement table; 2. clamping unit; 20. arc plate; 21. locking block; 22. sliding rod; 220. electric push rod; 23. limit plate; 230. adjustment frame; 231. reference plate; 232. locking pin; 233. adjustment through hole; 24. transverse frame; 240. pushing rod; 241. plug-in column; 242. plug-in slot; 3. processing table; 4. straightening unit; 40. laminating frame; 41. straightening roller; 42. rotating column; 43. mounting block; 44. docking rod; 440, docking block; 50. reference block; 51. slot; 52. pad. DETAILED DESCRIPTION

[0034] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] like Figure 1 and Figure 2 As shown, a production equipment for nickel-chromium electric heating strips includes: a placing table 1, which is U-shaped and has an opening facing upward. A clamping unit 2 for clamping the electric heating strip is provided on the placing table 1, and the clamping unit 2 includes an arc-shaped plate 20. Arc-shaped plates 20 are provided on the two vertical sections of the placing table 1 for sliding back and forth. The two arc-shaped plates 20 are symmetrical front to back. The axis position of the electric heating strip is preliminarily determined and the electric heating strip is clamped by bringing the two arc-shaped plates 20 close to each other and fitting the electric heating strip.

[0036] like Figure 1 and Figure 2 As shown, the clamping unit 2 also includes a locking block 21. A plurality of locking blocks 21 are equidistantly arranged from left to right and are provided on the arc plate 20 for sliding back and forth. After the arc plate 20 is attached to the electric heating strip, the locking block 21 locks the electric heating strip to the corresponding arc plate 20 through multi-point locking, that is, locks the pitch of the electric heating strip.

[0037] like Figure 1 and Figure 4 As shown, a processing table 3 is fixedly provided on the left side of the placement table 1, and a straightening unit 4 is provided on the processing table 3. The straightening unit 4 includes a laminating frame 40. Two front-to-back symmetrical laminating frames 40 are slidingly provided on the processing table 3. The laminating frames 40 are driven by an external hydraulic cylinder 1 (not shown in the figure) to move forward and backward, and two straightening rollers 41 distributed left and right are provided on the laminating frame 40.

[0038] The processing table 3 is provided with a driving unit, which is not only used to control the degree of contact between the two straightening rollers 41 and the electric heating strip, but also drives the two straightening rollers 41 on the left side to move left for straightening operations.

[0039] like Figure 4 and Figure 5 As shown, the two straightening rollers 41 on the right side are in contact with the electric heating strip to determine the position of the straightening section on the left side of the electric heating strip, and the two straightening rollers 41 on the left side facing each other are in contact with the heating strip and then moved left to straighten the heating strip.

[0040] During operation, the side of the electric heating strip that needs to be straightened is manually turned to the left, and the electric heating strip is moved between the two curved plates 20. The clamping unit 2 works to make the two curved plates 20 therein approach each other, thereby preliminarily limiting and clamping the electric heating strip by fitting the two curved plates 20 to the electric heating strip, and making the horizontal axis of the electric heating strip located at the center position between the two curved plates 20. Then, the straightening section of the electric heating strip is manually adjusted and the straightening section is placed between the front and rear straightening rollers 41. The external hydraulic cylinder drives the two fitting frames 40 to approach each other, so that the straightening roller 41 fits the right starting point of the straightening section, and the two straightening rollers 41 on the right cooperate to clamp the right starting point of the straightening section. Then, the locking block 21 in the clamping unit 2 moves to lock the part of the electric heating strip located between the two curved plates 20. It should be added that multi-point locking is achieved by multiple locking blocks 21 to lock the pitch of the electric heating strip to avoid deformation of the threaded section of the electric heating strip during the straightening process, which affects the normal use of the electric heating strip.

[0041] Finally, the driving unit drives the two straightening rollers 41 on the left to move left synchronously. The two straightening rollers 41 cooperate with each other to straighten the electric heating strip. After the straightening operation is completed, the clamping unit 2 and the driving unit are reset respectively to remove the electric heating strip.

[0042] like Figure 1 and Figure 2 As shown, the vertical sections of the placement table 1 slide back and forth and are penetrated by multiple sliding rods 22 distributed left and right and with axes extending from front to back. The arc plate 20 is fixedly set on all the sliding rods 22 on the same side, and the placement table 1 is provided with an electric push rod 220 for driving the sliding rod 22 to move back and forth.

[0043] like Figure 4 and Figure 5 As shown, the laminating frame 40 is U-shaped and the U-shaped openings of the two laminating frames 40 are opposite to each other. Two rotating columns 42 distributed left and right are provided on the laminating frame 40. The right rotating column 42 is fixed up and down and passes through the laminating frame 40. The left rotating column 42 is slid left and right on the laminating frame 40. The straightening rollers 41 are rotatably sleeved on the corresponding rotating columns 42. Initially, the four straightening rollers 41 are close to each other and serve as the placement reference for the straightening section of the electric heating strip.

[0044] like Figure 2 As shown, limit plates 23 are fixedly provided on the left and right sides of the curved plate 20, and adjustment frames 230 are provided on the two vertical sections of the placement table 1 for sliding back and forth. A reference plate 231 is fixedly provided on the adjustment frame 230 to prevent the curved plate 20 from excessive movement by blocking the limit plates 23.

[0045] The left and right end surfaces of the two vertical sections of the placement table 1 are movably plugged with locking pins 232, and the adjustment frame 230 is penetrated by a plurality of adjustment holes 233 for adjusting the position of the reference plate 231. The front and rear positions of the reference plate 231 are locked by inserting the locking pins 232 into the corresponding adjustment holes 233.

[0046] During operation, first adjust the distance between the two reference plates 231 according to the diameter of the heating strip. The specific operation is: manually pull out the locking pin 232 and move the adjustment frame 230 back and forth, so that the reference plate 231 moves to the desired position. At this time, the front and back spacing of the two reference plates 231 is adapted to the diameter of the electric heating strip. Then reinsert the locking pin 232 into the corresponding adjustment hole 233 and the placement table 1 to lock the front and back positions of the adjustment frame 230 and the reference plate 231.

[0047] Afterwards, the electric heating strip is manually placed between the two curved plates 20, and the electric push rod 220 works so that the sliding rod 22 drives the curved plate 20 close to the electric heating strip. Finally, the two curved plates 20 fit together with the front and rear sides of the electric heating strip, and the curved features of the curved plate 20 enable the electric heating strip to automatically adapt and adjust its position, so that the electric heating strip is finally clamped and limited between the two curved plates 20, and the axis of the electric heating strip located between the two curved plates 20 is adjusted and moved to the middle position of the two curved plates 20, and the axis of the electric heating strip is locked to provide a reference for the subsequent straightening process, ensuring that the subsequent straightening section is collinear with the above-mentioned axis after the straightening operation.

[0048] Secondly, it should be noted that when the arc plate 20 is close to the heating strip, the contact and cooperation between the reference plate 231 and the corresponding limit plate 23 limit the excessive displacement of the arc plate 20, thereby avoiding the problem of deformation and damage of the electric heating strip caused by excessive displacement of the arc plate 20 squeezing the electric heating strip. At the same time, it also ensures the initial positioning and clamping accuracy of the two arc plates 20 on the electric heating strip.

[0049] like Figure 1 、 Figure 2 and Figure 3 As shown, the clamping unit 2 also includes a transverse frame 24, and the transverse frame 24 is set on multiple sliding rods 22 on the same side to slide back and forth together. The transverse frame 24 is driven by an external electric guide rod (not shown in the figure) to move back and forth. A pushing rod 240 that slides back and forth and passes through the adjacent curved plates 20 is fixedly set on the transverse frame 24, and the locking block 21 is fixedly set on the pushing rod 240.

[0050] like Figure 2 and Figure 3As shown, the locking block 21 is U-shaped and its U-shaped opening faces the opposite arc plate 20. The U-shaped area of ​​the locking block 21 fits with the electric heating strip. All the locking blocks 21 on the front transverse frame 24 and all the locking blocks 21 on the rear transverse frame 24 are staggered left and right, and the distance between the two adjacent locking blocks 21 on the left and right is the same as the pitch of the electric heating strip.

[0051] like Figure 3 As shown, the two longitudinal sections of the locking block 21 are fixedly provided with plug-in posts 241 with axes extending from front to back on the end surfaces facing the opposite side arc-shaped plate 20, and the arc-shaped plate 20 is provided with plug-in slots 242 corresponding to the plug-in posts 241.

[0052] When the locking block 21 locks the electric heating strip onto the curved plate 20 , the electric heating strip is locked at multiple points by inserting the plug-in columns 241 into the corresponding plug-in slots 242 , ensuring that the electric heating strip maintains its original pitch during the straightening operation.

[0053] After the two curved plates 20 complete the initial positioning and clamping of the electric heating strip, the external electric guide rod works to make the transverse moving frame 24 drive the locking block 21 on it to move synchronously through the pushing rod 240, and the two transverse moving frames 24 opposite to each other move toward each other, so that the corresponding parts on the electric heating strip enter the U-shaped area of ​​the locking block 21, and finally the locking block 21 drives the plug-in column 241 on it to be inserted into the plug-in groove 242 at the corresponding position on the curved plate 20. At this point, the locking block 21 locks the corresponding position on the electric heating strip to the relative curved plate 20. In summary, through the locking process of multiple locking blocks 21, the pitch of the electric heating strip is completely locked when the electric heating strip is not deformed by external force, and the electric heating strip is pressure-locked to avoid deformation of the threaded section of the electric heating strip located between the two curved plates 20 during the subsequent straightening process, which affects the subsequent use quality of the electric heating strip.

[0054] like Figure 4 and Figure 5 As shown, the upper and lower end surfaces of the front side bonding frame 40 are fixedly provided with two left and right distributed mounting blocks 43, the rear end surface of the mounting block 43 is fixedly provided with a docking rod 44 with an axis extending from front to back, and the rear side bonding frame 40 is fixedly provided with docking blocks 440 corresponding to the docking rods 44 one by one. When the two bonding frames 40 are closed to bond the straightening section of the electric heating strip, the docking rods 44 pass through the corresponding docking blocks 440.

[0055] like Figure 1 、 Figure 2 and Figure 5As shown, the driving unit includes a reference plate 231, and two reference blocks 50 distributed left and right are provided on the processing table 3. The right reference block 50 is fixed on the processing table 3, and the left reference block 50 is slidably provided on the reference plate 231. The left reference block 50 is driven by an external hydraulic cylinder 2 (not shown in the figure) to move left and right. Initially, the two reference blocks 50 are in close contact.

[0056] The upper end surface of the reference block 50 is provided with two front-to-back symmetrical slots 51 , the openings of the slots 51 are chamfered, and when the laminating frame 40 drives the straightening roller 41 close to the heating strip, the lower end portion of the rotating column 42 moves into the corresponding slot 51 .

[0057] During operation, when the electric heating strip is initially placed, the electric heating strip is manually adjusted so that the straightening section of the electric heating strip faces upward, so that after the two laminating frames 40 are subsequently closed, the straightening section can extend upward from the middle area of ​​the two laminating frames 40, avoiding the straightening section affecting the closing process of the two laminating frames 40, and making the starting point of the straightening section located on the right side of the two straightening rollers 41 on the right.

[0058] Afterwards, the two curved plates 20 move to clamp the electric heating strip, and at the same time, the two laminating frames 40 are driven by an external hydraulic cylinder to move closer to each other. The laminating frames 40 drive the straightening rollers 41 thereon to move synchronously, and the front and rear opposite straightening rollers 41 cooperate with each other to press against the electric heating strip. The two straightening rollers 41 on the right press against the electric heating strip to lock the starting point of the straightening section, and the two straightening rollers 41 on the left press against the electric heating strip to perform the straightening action.

[0059] During the movement of the above-mentioned bonding frame 40, the lower part of the rotating column 42 moves into the corresponding slot 51, and then the external hydraulic cylinder 2 works to make the left reference block 50 gradually move to the left and drive the two left rotating columns 42 and the straightening roller 41 to move to the left synchronously through the rotating column 42. During the left movement, the above-mentioned two straightening rollers 41 cooperate with each other to straighten the electric heating strip, thereby completing the straightening process of the electric heating strip.

[0060] It should be additionally explained that, in the process of the two laminating frames 40 approaching each other, the docking rod 44 passes through the corresponding docking block 440, so that the two laminating frames 40 become one in the left and right directions, thereby serving as a frame guide rail for the leftward movement of the two straightening rollers 41 on the left side during the straightening process, thereby improving the stability during the straightening process.

[0061] like Figure 1 and Figure 5 As shown, the drive unit also includes a pad 52, and a plurality of pads 52 that fit tightly from front to back are placed in the slot 51. By adding and placing the required number of pads 52, the distance between the front and rear relative rotating columns 42 is adjusted to avoid the problem of excessive movement of the straightening roller 41.

[0062] Before performing the straightening operation, manually select the corresponding number of pads 52 according to the diameter of the electric heating strip, and insert the pads 52 into the corresponding slots 51. The front and rear rotating columns 42 corresponding to the reference block 50 move into the slots 51 and then press against the pads 52. The front and rear distance between the front and rear rotating columns 42 is controlled in the above manner, that is, the front and rear distance between the two front and rear straightening rollers 41 facing each other is controlled, so as to avoid the problem that the straightening rollers 41 are excessively moved by the bonding frame 40 during the front and rear movement of the bonding frame 40, resulting in deformation of the electric heating strip.

[0063] Although there is currently existing technology for straightening the straightening section of the electric heating strip, the protection mechanism for the characteristics of the threaded section of the electric heating strip itself during the straightening process is poor. In this solution, a clamping unit 2 and a straightening unit 4 are added to protect the threaded section of the electric heating strip through multi-point locking, so as to avoid the problem that the threaded section is deformed by force during processing and affects subsequent normal use. The above-mentioned added mechanical units are all conventional and ordinary mechanical structural components, which can be used for a long time after a single installation. Therefore, the cost of adding the above-mentioned structure is negligible compared to the economic benefits brought by the protection of the threaded section of the electric heating strip. In summary, the above-mentioned technical solution of the present invention is a specific improvement that is completely based on the existing technical status and solves technical problems.

[0064] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0065] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0067] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A production equipment for nickel-chromium electric heating strips, characterized in that: include: A placement table is provided with a clamping unit for clamping the electric heating strip, the clamping unit including an arc-shaped plate. The two vertical sections of the placement table are both provided with an arc-shaped plate that slides forward and backward. The two arc-shaped plates are symmetrical front to back. The two arc-shaped plates are attached to the electric heating strip to determine the axis position of the electric heating strip and clamp the electric heating strip. The clamping unit also includes a locking block. A plurality of locking blocks are arranged equidistantly from left to right on the curved plate and slide forward and backward. After the curved plate is attached to the electric heating strip, the locking block locks the electric heating strip to the corresponding curved plate through multi-point locking, thereby locking the pitch of the electric heating strip. A processing table is fixedly provided on the left side of the placement table, and a straightening unit is provided on the processing table. The straightening unit includes a laminating frame, and two laminating frames are symmetrically arranged on the processing table for sliding back and forth. The laminating frame is provided with two straightening rollers distributed left and right; The processing table is provided with a driving unit, which is used to control the degree of contact between the two straightening rollers facing each other and the electric heating strip, and at the same time drive the two straightening rollers facing each other on the left side to move leftward; The straightening roller on the right is in contact with the electric heating strip to determine the position of the straightening section, and the two straightening rollers on the left are in contact with the heating strip and then moved left to straighten the heating strip.

2. The production equipment of a nickel-chromium electric heating strip according to claim 1, characterized in that: The vertical sections of the placement table are all slidable forward and backward and are penetrated by a plurality of sliding rods distributed left and right and with axes extending from front to back. The arc-shaped plate is fixedly arranged on all the sliding rods on the same side. The placement table is provided with an electric push rod for driving the sliding rods to move forward and backward; The laminating frame is U-shaped and the U-shaped openings of the two laminating frames are opposite to each other. Two rotating columns distributed left and right are provided on the laminating frame. The right rotating column is fixed up and down and passes through the laminating frame. The left rotating column is slid left and right on the laminating frame. The straightening roller is rotatably sleeved on the corresponding rotating column.

3. The production equipment of a nickel-chromium electric heating strip according to claim 1, characterized in that: Limit plates are fixedly provided on the left and right sides of the arc plate, and adjustment frames are slidingly provided on the two vertical sections of the placement table. A reference plate is fixedly provided on the adjustment frame to prevent the arc plate from excessive movement by blocking the limit plates.

4. The production equipment of nickel-chromium electric heating strip according to claim 3, characterized in that: The left and right end surfaces of the two vertical sections of the placement table are movably connected with locking pins, and the adjustment frame is penetrated by a plurality of adjustment holes for adjusting the position of the reference plate. The front and rear positions of the reference plate are locked by inserting the locking pins into the corresponding adjustment holes.

5. The production equipment of nickel-chromium electric heating strip according to claim 2, characterized in that: The clamping unit also includes a transverse frame, which is provided on multiple sliding rods on the same side for sliding back and forth together. A push rod that slides back and forth and passes through adjacent arc plates is fixed on the transverse frame, and a locking block is fixed on the push rod.

6. The production equipment of nickel-chromium electric heating strip according to claim 5, characterized in that: The locking block is U-shaped and its U-shaped opening faces the opposite arc plate. The U-shaped area of ​​the locking block fits with the electric heating strip. All the locking blocks on the front transverse frame and all the locking blocks on the rear transverse frame are staggered left and right, and the distance between two adjacent locking blocks on the left and right is the same as the pitch of the electric heating strip.

7. The production equipment of nickel-chromium electric heating strip according to claim 1, characterized in that: The two longitudinal sections of the locking block are fixedly provided with plug-in posts with axes extending from front to back on the end surfaces of the arc-shaped plates on the opposite sides, and the arc-shaped plates are provided with plug-in slots corresponding to the plug-in posts one by one; When the locking block locks the electric heating strip onto the arc-shaped plate, the electric heating strip is locked at multiple points by inserting the plug-in columns into the corresponding plug-in slots, and the electric heating strip maintains its original pitch during the straightening operation.

8. The production equipment of nickel-chromium electric heating strip according to claim 1, characterized in that: The upper and lower end surfaces of the front bonding frame are fixed with two mounting blocks distributed on the left and right, and the rear end surfaces of the mounting blocks are fixed with docking rods with axes extending from front to back. The rear bonding frame is fixed with docking blocks corresponding to the docking rods one by one. When the two bonding frames are closed to bond the straightening sections of the electric heating strip, the docking rods pass through the corresponding docking blocks.

9. The production equipment of nickel-chromium electric heating strip according to claim 1, characterized in that: The driving unit includes a reference plate, and two reference blocks distributed left and right are provided on the processing table, the right reference block is fixedly provided on the processing table, and the left reference block is slidably provided on the reference plate; The upper end surface of the reference block is provided with two front-to-back symmetrical slots. When the laminating frame drives the straightening roller to approach the heating strip, the lower end portion of the rotating column moves into the corresponding slots.

10. The production equipment of nickel-chromium electric heating strip according to claim 9, characterized in that: The driving unit also includes a pad, and a plurality of pads are placed in the slot so as to fit tightly from front to back. The distance between the two rotating columns relative to each other can be adjusted by adding and placing a required number of pads.

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