A device for twist forming a coiled elastic part

Abstract

The application belongs to the technical field of elastic part processing, and particularly relates to a torsion forming device for coiling elastic parts, which comprises a first clamping mechanism, a second clamping mechanism, a torsion mechanism and a sliding driving mechanism. The first clamping mechanism is used for clamping and fixing the first end of an elastic part to be processed, and the second clamping mechanism is used for clamping and fixing the second end of the elastic part to be processed. The first clamping mechanism comprises a fixed seat I, a sliding seat and a clamping assembly I arranged on the sliding seat. The second clamping mechanism comprises a fixed seat II, a rotating disc and a clamping assembly II arranged on the rotating disc. The sliding seat can continue to move a small distance towards the second clamping mechanism, so that the distance between the clamping points of the first and second clamping mechanisms is adjusted to adapt to the change in the axial length of the part before and after torsion processing.

Description

Technical Field

[0001] This invention belongs to the field of processing technology for rolled elastic parts, and specifically relates to a device for twisting and forming rolled elastic parts. Background Technology

[0002] Positioning, clamping, and rotating mechanisms are an important component of non-standard automated equipment. These mechanisms are essential for transferring parts from one location to another or performing specific assembly actions. Traditional clamping mechanisms are limited in function and cannot simultaneously fulfill multiple requirements such as positioning, clamping, and rotational torsion; therefore, improvements are necessary.

[0003] In existing technologies, the clamping mechanisms commonly used in non-standard equipment are mostly two-point or three-point clamping, such as pneumatic fingers, electric grippers, and hydraulic chucks. Two-point clamping mechanisms have a simple structure, small overall size, can provide a large gripping force, and have high repeatability; however, they have fewer clamping points, making them prone to damaging the surface of parts when a large clamping force is required. Three-point clamping mechanisms have good self-centering capabilities, fast clamping speed, and a small clamping range; however, they are larger in overall size and weight. Some multi-point clamping fixtures have complex structures and are difficult to manufacture. Furthermore, existing twisting and forming devices for rolled elastic parts struggle to monitor clamping force, which can easily lead to excessive or insufficient clamping force, potentially resulting in loose parts due to insecure clamping or damage during processing due to excessive clamping force. In addition, there is another problem: existing clamping mechanisms are usually suitable for conventionally structured parts, but they are often difficult to adapt to the clamping characteristics of non-standard parts with irregular shapes. For example, a certain type of rolled elastic part has the same inner diameter holes at both ends, and the outer diameter at one end is smaller than the other. Generally, a special clamping mechanism is required to process such thick-walled parts, resulting in high equipment investment costs. Due to the problem of low equipment versatility, it is an urgent problem to solve to develop a twisting device with strong versatility and clamping function. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide a device for twisting and forming elastic parts. This device can solve the positioning, clamping and rotating twisting functions of hollow thin-walled parts in non-standard equipment, and realize the integration of multiple functions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for twisting and forming elastic parts, comprising a first clamping mechanism, a second clamping mechanism, a twisting mechanism, and a sliding drive mechanism, wherein the first clamping mechanism is used to clamp and fix a first end of the elastic part to be processed, and the second clamping mechanism is used to clamp and fix a second end of the elastic part to be processed. The first clamping mechanism includes a fixed seat I, a sliding seat, and a clamping component I disposed on the sliding seat, and the second clamping mechanism includes a fixed seat II, a rotating disk, and a clamping component II disposed on the rotating disk.

[0006] The sliding drive mechanism is used to drive the clamping component I of the first clamping mechanism to move closer to or away from the second clamping mechanism. The sliding seat is provided with a displacement compensation mechanism, which includes a movable block and an elastic element. The head end of the elastic element abuts against the tail end of the movable block, and the tail end of the elastic element abuts against the sliding seat. The movable block is slidably installed in the groove of the sliding seat.

[0007] The head end of the movable block can abut against the sliding seat and push the sliding seat, causing the clamping assembly I to move closer to the second clamping mechanism. During the twisting process of the twisting mechanism driving the rotating disk to twist around the central axis of the elastic part to be processed, the sliding seat moves adaptively to drive the clamping assembly I to continue moving a certain distance closer to the second clamping mechanism, so that the sliding seat separates from the head end of the movable block and compresses the elastic part, so as to adapt to the shortening of the axial length of the elastic part to be processed after twisting.

[0008] As a preferred embodiment, the rotating disk includes a gear end and a turntable end, wherein the outer edge of the gear end is provided with an outer gear ring that cooperates with the drive rack, the turntable end is rotatably disposed in the fixed seat II, and the clamping assembly II is connected to the turntable end and is arranged around the center of the turntable end; the torsion mechanism includes a drive rack and a torsion cylinder, the torsion cylinder is used to drive the drive rack to move linearly to realize the torsion of the elastic part to be processed.

[0009] As a preferred embodiment, the sliding drive mechanism includes a sliding motor, a lead screw, and a nut drive block. One end of the lead screw is connected to the power output end of the sliding motor, and the other end is rotatably mounted on the support base. The nut drive block is mounted on the lead screw and can move along the length of the lead screw. The nut drive block is provided with an internal thread that mates with the lead screw, and the nut drive block is fixedly connected to the movable block.

[0010] As a preferred embodiment, the clamping assembly II includes a pressure rod, a mounting ring, and a pulley. The mounting ring is fixedly mounted on the rotating disk, and multiple hinge joints are arranged around the mounting ring. The middle section of the pressure rod is movably connected to the hinge joint of the mounting ring. The pressure rod passes through the rotating disk, and a pressure head is provided at the head end of the pressure rod. A pulley is rotatably provided at the tail end of the pressure rod.

[0011] As a preferred embodiment, the second clamping mechanism further includes a clamping cylinder and a conical head; the pulley surface contacts the conical surface of the conical head, the push rod end of the clamping cylinder is connected to the conical head, and the clamping cylinder can push the conical head to move axially, thereby pushing the pulleys at the tail ends of all the pressure rods to open away from the central axis, so that the pressure head at the head end of the pressure rod clamps the end of the elastic part to be processed towards the center.

[0012] As a preferred embodiment, the conical head includes a connecting end and a pressing end, wherein the pressing end is provided with a conical surface, and its connecting end is detachably connected to the push rod end of the clamping cylinder.

[0013] As a preferred embodiment, the conical head is threadedly connected to the push rod end of the clamping cylinder; the clamping cylinder and the conical head are provided with a through hole I along the central axis.

[0014] As a preferred embodiment, it also includes a guiding positioning mechanism, the head end of which passes through the through hole I and extends outward. The guiding positioning mechanism includes a guiding positioning cylinder, a positioning shaft, and a sensing plate. The positioning shaft is connected to the piston end of the guiding positioning cylinder. The guiding positioning cylinder is fixedly installed at the tail end of the clamping cylinder. The positioning shaft passes through the through hole I and the clamping assembly II in sequence and then protrudes outward. The sensing plate is fixed at the end of the positioning shaft.

[0015] As a preferred embodiment, the clamping assembly I includes a pneumatic gripper and a spindle I, with the spindle I located at the axial center of the pneumatic gripper. The pneumatic gripper and the spindle I clamp and fix the end of the elastic part to be processed from both the inner and outer sides.

[0016] As a preferred embodiment, the lever arm from the hinge point of the pressure rod to the side of the pressure head is the first lever arm, and the lever arm from the hinge point of the pressure rod to the side of the pulley is the second lever arm, the length of the second lever arm being greater than the length of the first lever arm.

[0017] Beneficial effects

[0018] Firstly, this solution improves the structure. During the processing of rolled elastic parts, both ends are clamped and fixed by the first and second clamping mechanisms, respectively. During the twisting process, the elastic part will shorten axially due to the twisting. Since both ends of the elastic part are clamped and fixed by the clamping mechanisms, a displacement compensation mechanism is needed to adapt to the change in distance between the clamping points of the first and second clamping mechanisms. That is, the clamping component I of the first clamping mechanism will move slightly closer to the second clamping mechanism to compensate for the required reduction in the distance between the two clamping mechanisms. When the sliding drive mechanism moves the clamping component I of the first clamping mechanism, the movable block end of the displacement compensation mechanism can contact the sliding seat and push the sliding seat to move. When displacement compensation is needed, the sliding seat can continue to move slightly closer to the second clamping mechanism to adjust the distance between the clamping points of the first and second clamping mechanisms to adapt to the change in axial length of the part before and after processing.

[0019] Secondly, this solution considers the need to monitor the clamping force and position throughout the entire processing in order to achieve constant clamping and ensure consistent clamping positions. Therefore, a guiding positioning mechanism is designed for this purpose. First, the sensing plate extends. When the elastic part to be processed moves into position, the sensing plate detects this and retracts. At this point, the part is at the zero point. The sliding motor continues to push the sliding seat forward a fixed distance, and the first clamping mechanism achieves automatic positioning and clamping. At this point, the clamping position on that side of the part is fixed, thus achieving automatic positioning and clamping. During the twisting process, the clamping cylinder provides feedback torque, ensuring the clamping torque reaches the set value. This prevents the clamping force from being too small or too large during twisting, thus preventing loosening or damage to the parts during processing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the twisting and forming device of the present invention;

[0022] Figure 2 This is a cross-sectional view of the twisting and forming apparatus of the present invention;

[0023] Figure 3 This is a structural diagram of the first clamping mechanism in this invention;

[0024] Figure 4 The structure of the second clamping mechanism and the torsion mechanism in this invention Figure 1 ;

[0025] Figure 5 The structure of the second clamping mechanism and the torsion mechanism in this invention Figure 2 ;

[0026] Figure 6 This is a cross-sectional view of the first clamping mechanism in this invention;

[0027] Figure 7 This is a cross-sectional view of the second clamping mechanism in this invention;

[0028] Figure 8 This is a structural diagram of the elastic part to be processed (before twisting) in this invention;

[0029] Figure 9 This is a structural diagram of the torsion elastic component (after torsion) in this invention;

[0030] Figure 10 This is a schematic diagram of the clamping torque monitoring software interface in this invention;

[0031] Figure 11 This is a diagram of the clamping torque data acquisition curve interface in this invention;

[0032] Marked in the image:

[0033] 1. First clamping mechanism; 11. Fixed seat I; 12. Sliding seat; 121. Slide groove; 13. Fixed shaft; 14. Pneumatic gripper; 15. Auxiliary gripper; 16. Spindle I; 17. Slider I; 18. Slide rail; 19. Outer ring sleeve.

[0034] 2. Second clamping mechanism, 20. Clamping cylinder, 21. Fixed seat II, 22. Rotary disk, 221. Gear end, 222. Rotary disk end, 223. External gear ring, 224. Mounting seat, 23. Conical head, 231. Conical surface, 24. Pressure rod, 241. Pressure head, 25. Mounting ring, 26. Pulley, 27. Through hole I, 28. Through hole II, 29. Mandrel II, 210. Return spring;

[0035] 3. Torsion mechanism; 31. Drive rack; 32. Torsion cylinder; 33. Slider II; 34. Slide rail.

[0036] 4. Sliding drive mechanism; 41. Sliding motor; 42. Lead screw; 43. Nut drive block; 44. Support base; 45. Synchronous belt; 46. Protective cover.

[0037] 5. Displacement compensation mechanism; 51. Movable block; 52. Elastic element; 53. Tailstock;

[0038] 7. Conducting and positioning mechanism; 71. Conducting and positioning cylinder; 72. Positioning shaft; 73. Sensing plate;

[0039] 100. Elastic part to be processed; 101. First end ring; 102. Second end ring; 103. Straight connecting spring; 104. Torn connecting spring; 200. Torn elastic part. Detailed Implementation

[0040] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0041] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0042] Before introducing this solution, we will first illustrate the structure of a typical elastic part 100 to be processed in this solution. The elastic part 100 to be processed is made of metal, as shown in the figure. Figure 8 The component structure before processing has a first end ring 101 and a second end ring 102, and a straight connecting spring 103 is provided between the first end ring 101 and the second end ring 102. The twisting forming device of this solution clamps and fixes the first end ring 101 and the second end ring 102 respectively, and then twists the two ends relative to each other to form the elastic part 100 to be processed. The straight connecting spring 103 is twisted as follows... Figure 9 The torsion connecting spring 104 with a certain torsion angle is shown, thereby obtaining the torsion elastic part 200.

[0043] As shown in the figure, this embodiment provides a clamping force monitoring and twisting forming device for rolling elastic parts, including a first clamping mechanism 1, a second clamping mechanism 2, and a twisting mechanism 3. The first clamping mechanism 1 and the second clamping mechanism 2 are respectively used to clamp and fix the two ends of the elastic part 100 to be processed. The first clamping mechanism 1 includes a fixed base I 11, a sliding base 12, and a clamping assembly I disposed on the sliding base 12. The clamping assembly I is used to clamp and fix the first end of the elastic part 100 to be processed. The second clamping mechanism 2 includes a fixed base II 21, a rotating disk 22, and a clamping assembly II mounted on the rotating disk 22. Component II is used to clamp and fix the second end of the elastic part 100 to be processed. The first clamping mechanism 1 is a movable position, and the second clamping mechanism 2 is a fixed position. The twisting mechanism 3 is located at the second clamping mechanism 2 and is used to drive the clamping component II to rotate, thereby achieving the twisting forming of the elastic part 100. This solution considers that the axial length of the elastic part 100 will shorten after twisting, therefore further displacement compensation is needed to compensate for the shortened length, so that the distance between the clamping points of the first clamping mechanism 1 and the second clamping mechanism 2 adapts to the twisting of the elastic part 100. The twisting forming device in this solution can solve the positioning, clamping, and rotational twisting functions of hollow thin-walled parts in non-standard equipment, facilitating subsequent part processing and manufacturing, and quickly meeting production capacity requirements.

[0044] In this design, the torsion mechanism 3 includes a torsion cylinder 32, a drive rack 31, and a slider II 33. A sliding track 34 is provided on the base of the torsion mechanism 3. The torsion cylinder 32 is fixed to the base, and its telescopic rod end is fixedly connected to the drive rack 31. The drive rack 31 is a straight rack that meshes with the outer gear ring 223 of the rotating disk 22, thereby driving the clamping assembly II to rotate. The working principle of the torsion cylinder 32 is as follows: the torsion cylinder 32 pushes the drive rack 31 to move, the drive rack 31 drives the rotating disk 22 to rotate, thereby driving the clamping assembly II to rotate, thus realizing the rotational torsion function of the elastic part 100 to be processed. To better ensure the stability of linear motion, the slider II 33 adopts a T-shaped slider, and the sliding track 34 has a T-shaped sliding groove structure to adapt and cooperate with the slider II 33.

[0045] A typical embodiment of the present invention further includes a sliding drive mechanism 4, which is used to drive the clamping component I of the first clamping mechanism 1 to move in two directions, toward or away from the second clamping mechanism 2. The sliding drive mechanism 4 includes a sliding motor 41, a lead screw 42, a nut drive block 43, and a support base 44. The sliding motor 41 and the support base 44 are fixedly mounted on the fixed base I 11. The first end of the lead screw 42 is connected to the driving end of the sliding motor 41, and the second end of the lead screw 42 is rotatably mounted on the support base 44. The support base 44 is a bearing seat and is rotatably connected to the lead screw 42. The nut drive block 43 is a lead screw nut, which is engaged with the external thread of the lead screw 42. When the lead screw 42 rotates, the nut drive block 43 can move along the length direction of the lead screw 42.

[0046] In this invention, the displacement compensation mechanism 5 includes a movable block 51 and an elastic element 52. The elastic element 52 includes one or more parallel springs. The movable block 51 is slidably installed in a groove 121 at the tail of the sliding seat 12. The movable block 51 is fixedly connected to the nut drive block 43. The movable block 51 is located on one side of the head end of the nut drive block 43 and is screwed to it. A cavity for the lead screw 42 to pass through is formed on the movable block 51. The movable block 51 and the lead screw 42 do not contact each other. The elastic element 52 is located in the groove 121. The first end of the elastic element 52 abuts against the slot of the movable block 51, and the second end is connected to the slot of the tail seat 53. The tail seat 53 is set at the opening of the groove 121 and is detachably connected, fixedly connected, or integrally set with the sliding seat 12. The slots at both ends can realize the fixed setting of the elastic element 52. In one embodiment of this invention, sliders I 17 are respectively provided on both sides of the bottom of the sliding seat 12. The sliders I 17 are slidably set on a pair of slide rails 18 on the end face of the fixed seat I 11. The sliding seat 12 includes a base plate, a vertical plate, and ribs. The vertical plate is vertically mounted on the base plate, and the ribs are located at the connection between the vertical plate and the base plate, thus providing a certain degree of reinforcement. The clamping assembly I is mounted on the vertical plate. In this design, the sliding motor 41 is located on one side of the slide rail 18. The pulley of the sliding motor 41 is connected to the pulley at the end of the lead screw 42 via a synchronous belt 45, and the sliding motor 41 drives the lead screw 42 to rotate synchronously.

[0047] The cooperation relationship and working principle of the sliding drive mechanism 4 and the displacement compensation mechanism 5 in this scheme are explained as follows: The sliding motor 41 of the sliding drive mechanism 4 drives the lead screw 42 to rotate, while the nut drive block 43 moves axially on the lead screw 42. The nut drive block 43 and the movable block 51 are fixedly connected. Therefore, the nut drive block 43 and the movable block 51 move synchronously, and one side of the head end of the movable block 51 can abut against the sliding seat 12. At this time, the movable block 51 is in the driving position in the sliding groove 121, moving towards its head end. The sliding motor 41 drives the sliding seat 12 to move, thereby making the clamping component I of the first clamping mechanism 1 approach the second clamping mechanism 2; during the torsion process, When the sliding motor 41 stops driving, the axial length of the elastic part 100 to be processed gradually shortens due to structural deformation during the twisting process. The sliding seat 12 needs to continue moving a certain distance towards the second clamping mechanism 2 for displacement compensation. Therefore, during the twisting process, the nut drive block 43 and the movable block 51 remain stationary, while the sliding seat 12 continues to move a small distance towards the second clamping mechanism 2. The power for this small movement of the sliding seat 12 comes from the tension generated by the axial shortening of the elastic part 100 during the twisting process. Displacement compensation is achieved by compressing the elastic element 52. At this time, one side of the head of the movable block 51 separates from the sliding seat 12, and the elastic element 52 is compressed. When the first clamping mechanism 1 needs to be reset after twisting is completed, the nut drive block 43 and the movable block 51 move synchronously in opposite directions. The movable block 51 pushes the sliding seat 12 away from the second clamping mechanism 2 by squeezing the elastic element 52, thus achieving reset.

[0048] In this embodiment, the rotating disk 22 includes a gear end 221 and a turntable end 222 coaxially arranged. The gear end 221 is mainly a disc structure, and an external gear ring 223 is provided on the outer edge of the disc. The turntable end 222 is mainly a disc, and a clamping assembly II is installed on the head end side of the turntable end 222. The clamping assembly II includes a pressure rod 24, a mounting ring 25, a pulley 26, and a return spring 210. The mounting ring 25 is located at the center of the end face of the turntable end 222. The rotating disk 22 is provided with a hole for the pressure rod 24 to pass through. A pressure head 241 is fixedly installed at the head end of the pressure rod 24, and a pulley 26 is rotatably installed at the tail end of the pressure rod 24. The middle section of the pressure rod 24 is hinged to the hinge point of the mounting ring 25. The lever arm from the hinge point of the pressure rod 24 to the side of the pressure head 241 is the first lever arm, and the lever arm from the hinge point of the pressure rod to the side of the pulley 26 is the second lever arm. The second lever arm is longer than the first lever arm. Since the lever arm at one end of the pulley 26 is longer than the lever arm at one end of the pressure head 241, it amplifies the force applied to the clamping force. The lever arm is the perpendicular distance from the hinge point to the line of action of the force on the corresponding side. A ring-shaped return spring 210 is provided between the hinge point of the pressure rod 24 and the pulley 26. The return spring 210 is connected end to end and surrounds the groove outside all the pressure rods 24. The groove outside the pressure rod 24 is located on one side of the tail end of its hinge point. When the push rod of the clamping cylinder 20 retracts, it drives the conical head 23 to move axially. As the conical head 23 retracts, the return spring 210 contracts towards the center, pulling the tail end of the pressure rod 24 to achieve the reset of the pressure rod 24. This causes one end of the pulley 26 to retract towards the center and one end of the pressure head 241 to open, so as to facilitate the removal of the part and the placement for the processing of the next component. The base of the clamping cylinder 20 is fixed to the end face of the gear end 221 of the rotating disk 22 by the mounting seat 224. The piston end of the clamping cylinder 20 extends towards the rotating disk 22 and is fixedly mounted with the conical head 23.

[0049] In this solution, considering that to achieve multi-point clamping, one conical head 23 corresponds to multiple pressure heads 241 application points, and the thrust of the conical head 23 is distributed among multiple pressure heads 241, the application force requires a large force to meet the clamping requirements, placing high demands on the overall equipment and increasing manufacturing and operating costs. Therefore, in this solution, to better achieve the clamping and fixing effect and save on equipment and operating costs, the applied force of the conical head 23 is amplified to a certain extent. Within a certain range, the clamping cylinder 20 only needs to apply a smaller force to meet the clamping and fixing requirements, and the clamping effect is firm. This solution achieves the amplification of applied force through the following measures: First, by designing the taper of the conical head 23, the conical head 23 achieves the first amplification of the applied force of the clamping cylinder 20 at the conical surface 231. That is, the conical head 23 is smaller than a certain taper range, so that the conical surface 231 has a certain degree of force amplification. Within a certain range, the smaller the taper of the conical head 23, the better the thrust of the clamping cylinder 20 can play an amplification role. Secondly, in order to further amplify the force, the lever arms at both ends of the pressure rod 24 are designed such that the lever arm length at the force application end of the pulley 26 is greater than the lever arm length at one end of the pressure head 241. This allows the hinge point of the pressure rod 24 to serve as the support point, thereby achieving a secondary amplification of the force applied to the conical head 23. Although only one conical head 23 is used as the force application point to achieve multi-point clamping, the clamping force of the pressure head 241 at each clamping point is effectively amplified. This ensures the clamping effect of the clamping assembly on the elastic part with a relatively small applied force. It should be noted that the amplification effect of the pressure rod 24 alone can also achieve a certain degree of force amplification, thus providing a clamping and fixing prerequisite for the next step of torsion forming.

[0050] In this solution, taking the elastic part 100 to be processed as an example, given a fixed diameter of the elastic part 100, the shorter the length of its straight connecting spring 103, the greater the required torsional force and the greater the required clamping force. To adapt to the processing needs of parts of different lengths and achieve multi-purpose functionality, thereby reducing equipment costs and improving equipment versatility, the conical head 23 can be disassembled and replaced with different specifications. Thus, by designing different conical surfaces, the conical head 23 is suitable for processing elastic parts 100 of different lengths. The conical head 23 is connected to the telescopic rod of the clamping cylinder 20 by a threaded connection; the clamping cylinder 20 is a servo electric cylinder. Since the other end of the conical head 23 only contacts the pulley 26, it is very convenient to disassemble and replace the conical head 23 with parts of different tapers. Through the contact and cooperation between the conical head 23 and the pulley 26, the clamping force is transmitted, and the effect of multi-point clamping is achieved, preventing the elastic part 100 to be processed from being pinched. In addition, the design of this solution simplifies the structure of the clamping mechanism to a certain extent, and allows for the selection of conical heads 23 with different tapers for processing according to different specifications of elastic parts 100, which facilitates assembly and disassembly. Preferably, the conical head 23 and the telescopic rod of the clamping cylinder 20 are connected by threads, and the conical head 23 can be quickly replaced by simply turning it to adapt to the processing of parts with different structures, thus improving the versatility of the equipment.

[0051] In this design, the pressure head 241 of the pressure rod 24 cooperates with the mandrel II 29, resulting in a large opening gap. For specific non-standard parts to be processed, such as a certain model of non-standard part with the same inner diameter holes at both ends, and an outer diameter at one end smaller than the other, the thinner end of the part can be clamped and fixed using the first clamping mechanism 1, while the thicker end is fixed using the second clamping mechanism 2. Therefore, the clamping assembly II can adapt to non-standard parts with different structures, thereby improving the equipment's versatility. Furthermore, the mandrel II 29 is threaded onto the rotating disk 22 and can be disassembled and replaced with mandrels II 29 of different diameters to accommodate different inner diameters of the parts to be processed, further enhancing the equipment's structural versatility and adaptability.

[0052] In this scheme, the second clamping mechanism 2 uses the principle of pressure rod and inclined plane. It amplifies the small horizontal thrust twice through the inclined plane and pressure rod 24 and converts it into clamping force. At the same time, the required cone angle is calculated and designed to meet the clamping force requirements. The cone design method is used here, which not only amplifies the clamping force, but also designs different cone thrust rod angles according to the clamping force requirements, making the overall structural design simple and clear.

[0053] In this embodiment, a conductive positioning mechanism 7 is also provided. To achieve automated control of the entire twisting process, this solution uses the conductive positioning mechanism 7 to detect whether the elastic part 100 to be processed is installed in place. The conductive positioning mechanism 7 includes a conductive positioning cylinder 71, a positioning shaft 72, and a sensing plate 73. The conductive positioning cylinder 71 is fixedly installed at the tail end of the clamping cylinder 20. The conductive positioning cylinder 71 is a pneumatic cylinder. The tail end of the positioning shaft 72 is connected to the telescopic rod of the conductive positioning cylinder 71. The head end of the positioning shaft 72 passes through the through hole I 27 of the clamping cylinder 20 and the conical head 23, and then through the through hole II 28 of the second clamping mechanism 2, and exits through the center hole of the mandrel II 29. The sensing plate 73 is installed on the positioning shaft 72 by a threaded connection or an embedded method. The sensing plate 73 is used to detect whether the elastic part 100 to be processed is clamped in place. In this solution, the positioning shaft 72 is made of non-metallic material, and the sensing plate 73 is made of metallic material. The conductive positioning cylinder 71 is equipped with a proximity switch for detecting the position. Its working principle is as follows: The conductive positioning cylinder 71 drives the positioning shaft 72 and the sensing plate 73 to move, so that the sensing plate 73 is separated from the mandrel I16 by a certain distance (to avoid the sensing plate 73 being affected by the metal material of the mandrel I16). When the sensing plate 73 senses the signal of the elastic part 100 to be processed, this is the clamping zero point of the elastic part 100 to be processed. With this clamping zero point as the zero point position, the sensing plate 73 retracts, and the sliding motor 41 continues to drive the elastic part 100 to be processed to move a specific distance, so that the clamping position length of the elastic part 100 to be processed at this end is fixed. Thus, the above-mentioned conductive positioning mechanism 7 can automatically achieve the consistency of the clamping position for different elastic parts 100 to be processed. In this solution, the conductive positioning cylinder 71 is equipped with a cylinder magnetic proximity switch to detect the movement position of its piston to determine the extension position of the positioning shaft 72. Through dual detection and precise feedback, the product is accurately positioned in the axial direction, ensuring the consistency of the product's clamping position each time. Dual detection refers to two aspects: firstly, the piston position of the positioning cylinder 71 is positioned and activated by a magnetic proximity switch on the cylinder; secondly, the sensing plate 73 at the front end of the positioning shaft 72 senses a metal signal and activates. This dual positioning avoids incorrect judgment of the clamping position of the elastic part 100 to be processed based on a single signal. For example, it prevents situations where only the piston position of the positioning cylinder 71 is activated, but the elastic part 100 at the front end is not in position. Alarms or other methods can be used to provide prompts, thus achieving a more accurate judgment of whether the elastic part 100 is properly clamped, and better ensuring clamping consistency. Once the elastic part 100 reaches the predetermined clamping position, the clamping assembly II clamps and fixes the elastic part 100, preparing it for twisting processing.

[0054] In this design, the clamping assembly I includes a pneumatic gripper 14 and a spindle I 16 disposed within the pneumatic gripper 14. The spindle I 16 is located at the axial center of the pneumatic gripper 14. The pneumatic gripper 14 and the spindle I 16 clamp and fix the end of the elastic part 100 to be processed from both the inner and outer sides. The spindle I 16 provides internal support for the hollow elastic part 100. The outer conical surface of the pneumatic gripper 14 engages with the inner conical surface of the outer ring 19. When the pneumatic gripper 14 retracts, based on the engagement of the inner and outer conical surfaces, the pneumatic gripper 14 clamps towards the center and moves radially. The auxiliary gripper 15 can be made of an elastic material, such as rubber. The pneumatic gripper 14 clamps and fixes the elastic part 100 to be processed from multiple external sides by pressing the auxiliary gripper 15.

[0055] This solution uses the pushing action of the clamping cylinder 20 to push the conical head 23 to move the pulley 26. The thrust is amplified by the combined action of the conical surface 231 and the pressure rod 24. The hollow part of the elastic component is supported by the spindle Ⅱ 29. The clamping cylinder 20 monitors and provides feedback on the output force during the pushing process, thereby monitoring and providing feedback on the clamping force and controlling the clamping force during the clamping process of the hollow component.

[0056] In this solution, data is collected from the clamping cylinder 20, and the torque monitoring and control interface is as follows: Figure 10 As shown, the servo electric cylinder outputs real-time torque feedback, and a PLC control system realizes data acquisition and real-time torque monitoring. The torque magnitude is set, and when the monitored torque reaches the set torque, the torque meets the set requirement. Design software is used to collect and analyze the force values ​​during the testing process, serving as a reference for setting force values ​​in the production process of product parts and providing data support for the production of other product parts. During data detection, multiple sets of torque values ​​are collected. Based on the collected values ​​after the lifting position, the average of these values ​​is taken as the calculated torque value. This solution uses design software to collect and analyze the force values ​​during the testing process, serving as a reference for setting force values ​​in the product production process and providing data support for the production of other product components (see reference). Figure 11 (As shown).

[0057] In this scheme, the working principle is as follows: the first clamping mechanism 1 clamps the first end of the elastic part 100 to be processed by manual or machine feeding. The sliding motor 41 in the sliding drive mechanism 4 drives the nut drive block 43 to move through the lead screw 42. The nut drive block 43 presses against the slide groove 121 of the sliding seat 12, pushing the clamping component I of the first clamping mechanism 1 to slide closer to the second clamping mechanism 2. The sensing plate 73 on the conductive positioning mechanism 7 extends to the head end. After the sensing plate 73 on the conductive positioning mechanism 7 detects that the elastic part 100 to be processed has moved into place, the sliding motor 41 continues to push forward a specific distance with that point as the zero point position. The pressure rod 24 drives the pressure head 241 to achieve positioning and clamping at the mandrel II 29. The clamping force on the part is controlled by the output force of the clamping cylinder 20 to achieve constant force clamping. The sensing plate 73 on the conductive positioning mechanism 7 needs to be retracted to avoid interference with the torsion process. Then the torsion mechanism 3 pushes the rotating disk 22 to rotate. At this time, the elastic part 100 to be processed is fixed and twisted to rotate, so that the straight connecting spring 103 of the elastic part 100 to be processed is twisted to form the torsion connecting spring 104, thereby obtaining the torsion elastic part 200. Since the axial length of the elastic part 100 to be processed will be shortened to a certain extent during the process of processing into the torsion elastic part 200, the sliding seat 12 will automatically move forward towards the direction of the second clamping mechanism 2 during the torsion process, thereby realizing the adaptive adjustment of the clamping and fixing point distance between the first clamping mechanism 1 and the second clamping mechanism 2.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for twisting and forming elastic parts, characterized in that: It includes a first clamping mechanism (1), a second clamping mechanism (2), a torsion mechanism (3), and a sliding drive mechanism (4). The first clamping mechanism (1) is used to clamp and fix the first end of the elastic part (100) to be processed, and the second clamping mechanism (2) is used to clamp and fix the second end of the elastic part (100) to be processed. The first clamping mechanism (1) includes a fixed seat I (11), a sliding seat (12), and a clamping component I disposed on the sliding seat (12). The second clamping mechanism (2) includes a fixed seat II (21), a rotating disk (22), and a clamping component II disposed on the rotating disk (22). The sliding drive mechanism (4) is used to drive the clamping component I of the first clamping mechanism (1) to move closer to or away from the second clamping mechanism (2). The sliding seat (12) is provided with a displacement compensation mechanism (5). The displacement compensation mechanism (5) includes a movable block (51) and an elastic element (52). The head end of the elastic element (52) abuts against the tail end of the movable block (51), and the tail end of the elastic element (52) abuts against the sliding seat (12). The movable block (51) is slidably installed in the groove (121) of the sliding seat (12). The head end of the movable block (51) can abut against the sliding seat (12) and push the sliding seat (12) to move the clamping assembly I toward the direction of the second clamping mechanism (2). During the twisting process of the twisting mechanism (3) driving the rotating disk (22) to twist around the central axis of the elastic part (100) to be processed, the sliding seat (12) moves adaptively to drive the clamping assembly I to continue to move a certain distance toward the direction of the second clamping mechanism (2), so that the sliding seat (12) separates from the head end of the movable block (51) and compresses the elastic part (52) to adapt to the shortening of the axial length of the elastic part (100) to be processed after twisting.

2. The device for twisting and forming rolled elastic parts according to claim 1, characterized in that: The rotating disk (22) includes a gear end (221) and a turntable end (222). The outer edge of the gear end (221) is provided with an outer gear ring (223) that cooperates with the drive rack (31). The turntable end (222) is rotatably disposed in the fixed seat II (21). The clamping assembly II is connected to the turntable end (222) and is arranged around the center of the turntable end (222). The torsion mechanism (3) includes a drive rack (31) and a torsion cylinder (32). The torsion cylinder (32) is used to drive the drive rack (31) to move linearly to realize the torsion of the elastic part (100) to be processed.

3. The device for twisting and forming elastic parts according to claim 1, characterized in that: The sliding drive mechanism (4) includes a sliding motor (41), a lead screw (42) and a nut drive block (43). One end of the lead screw (42) is connected to the power output end of the sliding motor (41), and the other end is rotatably mounted on the support base (44). The nut drive block (43) is mounted on the lead screw (42) and can move along the length of the lead screw (42). The nut drive block (43) is provided with an internal thread that mates with the lead screw (42), and the nut drive block (43) is fixedly connected to the movable block (51).

4. The device for twisting and forming rolled elastic parts according to claim 1, characterized in that: The clamping assembly II includes a pressure rod (24), a mounting ring (25), and a pulley (26). The mounting ring (25) is fixedly mounted on the rotating disk (22). Multiple hinge joints are arranged around the mounting ring (25). The middle section of the pressure rod (24) is movably connected to the hinge joint of the mounting ring (25). The pressure rod (24) passes through the rotating disk (22), and a pressure head (241) is provided at the head end of the pressure rod (24). A pulley (26) is rotatably provided at the tail end of the pressure rod (24).

5. The device for twisting and forming rolled elastic parts according to claim 4, characterized in that: The second clamping mechanism (2) further includes a clamping cylinder (20) and a conical head (23); the surface of the pulley (26) contacts the conical surface (231) of the conical head (23), the push rod end of the clamping cylinder (20) is connected to the conical head (23), the clamping cylinder (20) can push the conical head (23) to move axially, thereby pushing the pulleys (26) at the tail end of all the pressure rods (24) to open away from the central axis, so that the pressure head (241) at the head end of the pressure rod (24) clamps the end of the elastic part (100) to be processed towards the center.

6. The device for twisting and forming rolled elastic parts according to claim 5, characterized in that: The conical head (23) includes a connecting end and a pressing end, wherein the pressing end is provided with a conical surface (231), and its connecting end is detachably connected to the push rod end of the clamping cylinder (20).

7. The device for twisting and forming a rolled elastic part according to claim 6, characterized in that: The conical head (23) is threadedly connected to the push rod end of the clamping cylinder (20); the clamping cylinder (20) and the conical head (23) are provided with a through hole I (27) along the central axis.

8. The device for twisting and forming a rolled elastic part according to claim 7, characterized in that: It also includes a guiding positioning mechanism (7), the head end of which passes through the through hole I (27) and extends out. The guiding positioning mechanism (7) includes a guiding positioning cylinder (71), a positioning shaft (72) and a sensing plate (73). The positioning shaft (72) is connected to the piston end of the guiding positioning cylinder (71). The guiding positioning cylinder (71) is fixedly installed at the tail end of the clamping cylinder (20). The positioning shaft (72) passes through the through hole I (27) and the clamping assembly II in sequence and then protrudes outward. The sensing plate (73) is fixed at the end of the positioning shaft (72).

9. The device for twisting and forming rolled elastic parts according to claim 1, characterized in that: The clamping assembly I includes a pneumatic gripper (14) and a spindle I (16). The spindle I (16) is located at the axial center of the pneumatic gripper (14). The pneumatic gripper (14) and the spindle I (16) clamp and fix the end of the elastic part (100) to be processed from the inner and outer sides.

10. The device for twisting and forming a rolled elastic part according to claim 5, characterized in that: The lever arm from the hinge point of the pressure rod (24) to the side of the pressure head (241) is the first lever arm, and the lever arm from the hinge point of the pressure rod (24) to the side of the pulley (26) is the second lever arm. The length of the second lever arm is greater than the length of the first lever arm.

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