Twisting forming device for rolled elastic part

Abstract

The invention belongs to the technical field of elastic part machining, and particularly relates to a rolled elastic part twisting forming device which comprises a first clamping mechanism, a second clamping mechanism, a twisting mechanism and a sliding driving mechanism. The second clamping mechanism is used for clamping and fixing the second end of the elastic part to be machined, the first clamping mechanism comprises a fixing base I, a sliding base and a clamping assembly I arranged on the sliding base, and the second clamping mechanism comprises a fixing base II, a rotating disc and a clamping assembly II arranged on the rotating disc; and the sliding seat can continuously move for a small distance towards the direction close to the second clamping mechanism, so that the distance between the clamping points of the first clamping mechanism and the second clamping mechanism is adjusted to adapt to the axial length change before and after twisting processing of the part.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of processing of coiled elastic parts, and particularly relates to a coiled elastic part twist forming device. BACKGROUND

[0002] The positioning and clamping rotating mechanism is an important component part in non-standard automation equipment. The non-standard automation equipment can only realize the transfer of parts from one position to another position or execute certain specific assembly actions through the clamping mechanism. The traditional clamping mechanism has single function and is difficult to simultaneously meet multiple functions such as positioning, clamping and rotating twist, and therefore needs to be improved.

[0003] In the related prior art, the clamping mechanism commonly used in non-standard equipment is mainly two-point or three-point clamping, such as pneumatic fingers, electric claws and hydraulic chucks. The two-point clamping mechanism has simple structure, small overall size, can provide large gripping force, and has high repeatability positioning accuracy; the disadvantage is that the number of clamping points is small, and when the clamping force is required to be large, the surface of the part is easily damaged. The three-point clamping mechanism has good self-centering function, fast clamping speed and small clamping range; the disadvantage is that the overall size and weight are large. In addition, the structure of the part of the multi-point clamping function clamp is complex and difficult to manufacture. In addition, the existing coiled elastic part twist forming device cannot realize the monitoring of the clamping force, and therefore the clamping fixing force of the parts is easily too large or too small, which may cause the parts to be loose due to the loose clamping fixation, or the parts to be damaged during processing due to the excessive clamping force. In addition, there is a problem that: the existing clamping mechanism is generally suitable for conventional structure parts, and it is difficult to adapt to the clamping characteristics of non-standard parts with special shape, for example, a certain coiled elastic part has the same inner diameter hole at both ends, and the outer diameter of both ends is small at one end and large at the other end. Generally, a special clamping mechanism needs to be specially set to process the thick-walled parts, which leads to high equipment investment cost. Based on the problem of low equipment universality, it is urgent to develop a twist device with clamping function with strong universality. SUMMARY

[0004] The purpose of the present application is to solve the above-mentioned problems in the prior art, and to provide a coiled elastic part twist forming device. The device can realize the positioning, constant force clamping and rotating twist of the hollow thin-walled parts in the non-standard equipment, and realize the integration of multiple functions.

[0005] To achieve the above object, the present application adopts the following technical scheme: a torsion forming device for coiling elastic parts, comprising a first clamping mechanism, a second clamping mechanism, a torsion mechanism and a sliding drive mechanism, the first clamping mechanism is used for clamping and fixing the first end of the elastic part to be processed, 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 drive mechanism is used to drive the clamping assembly I of the first clamping mechanism to approach or move away from the second clamping mechanism, the sliding seat is provided with a displacement compensation mechanism, the displacement compensation mechanism comprises a movable block and an elastic element, the head end of the elastic element abuts against the tail of the movable block, the tail end of the elastic element abuts against the sliding seat, and the movable block is slidably installed in the sliding groove of the sliding seat; The head end side of the movable block can abut against the sliding seat and can push the sliding seat to move the clamping assembly I in the direction of approaching the second clamping mechanism, during the torsion process of the rotating disc driven by the torsion mechanism around the central axis of the elastic part to be processed, the sliding seat is adaptively moved to drive the clamping assembly I to continue moving a certain distance in the direction of approaching the second clamping mechanism, so that the sliding seat is separated from the head end side of the movable block and the elastic element is compressed, so as to adapt to the axial length shortening of the elastic part to be processed after torsion.

[0006] As a preferred scheme, the rotating disc comprises a gear end and a rotating disc end, wherein the outer edge of the gear end is provided with a circle of outer gear ring matched with the driving rack, the rotating disc end is rotatably arranged in the fixed seat II, the clamping assembly II is connected with the rotating disc end and is arranged around the center of the rotating disc end, the torsion mechanism comprises a driving rack and a torsion cylinder, the torsion cylinder is used to drive the driving rack to move linearly to realize the torsion of the elastic part to be processed.

[0007] As a preferred scheme, the sliding drive mechanism comprises a sliding motor, a lead screw and a nut driving block, one end of the lead screw is in transmission connection with the power output end of the sliding motor, the other end is rotatably arranged on the support seat, and the nut driving block is installed on the lead screw and can move along the length direction of the lead screw; the nut driving block is provided with an inner thread matched with the lead screw, and the nut driving block is fixedly connected with the movable block.

[0008] As a preferred scheme, the clamping assembly II comprises a pressing rod, a mounting ring and a pulley, the mounting ring is fixedly arranged on the rotating disc, a plurality of hinged joints are arranged around the mounting ring, the middle segment of the pressing rod is movably connected with the hinged joints of the mounting ring, the pressing rod penetrates through the rotating disc, the head end of the pressing rod is provided with a pressing head, and the tail end of the pressing rod is rotatably provided with the pulley.

[0009] As a preferred solution, the second clamping mechanism further comprises a clamping cylinder and a conical head; the pulley wheel surface is in contact with the conical surface of the conical head, the push rod end of the clamping cylinder is connected with 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 pressing rods to open in the direction away from the central axis, so that the pressing heads at the head ends of the pressing rods clamp the ends of the elastic part to be processed towards the center.

[0010] As a preferred solution, the conical head comprises a connecting end and a pressing end, wherein the pressing end is provided with a conical surface, and the connecting end is detachably connected with the push rod end of the clamping cylinder.

[0011] As a preferred solution, the conical head is threadedly connected with the push rod end of the clamping cylinder; the clamping cylinder and the conical head are provided with a through hole I in the direction of the central axis.

[0012] As a preferred solution, a guide positioning mechanism is further included, the head end of the guide positioning mechanism penetrates through the through hole I and extends out, the guide positioning mechanism comprises a guide positioning cylinder, a positioning shaft and a sensing sheet, the positioning shaft is connected with the piston end of the guide positioning cylinder, the guide positioning cylinder is fixedly installed at the tail end of the clamping cylinder, the positioning shaft penetrates through the through hole I and the clamping assembly II in sequence and then extends outwards, and the sensing sheet is fixed at the end of the positioning shaft.

[0013] As a preferred solution, the clamping assembly I comprises a pneumatic clamping jaw and a mandrel I, the mandrel I is located at the axial center of the pneumatic clamping jaw, and the pneumatic clamping jaw and the mandrel I clamp and fix the ends of the elastic part to be processed from the inside and outside.

[0014] As a preferred solution, the force arm of the pressing rod from the hinge point to one side of the pressing head is a first force arm, the force arm of the pressing rod from the hinge point to one side of the pulley is a second force arm, and the length of the second force arm is greater than that of the first force arm.

[0015] Advantages Firstly, through structural improvement, the two ends of the rolled elastic part are clamped and fixed by the first and second clamping mechanisms during processing, and the elastic part will be shortened axially during the twisting process of the twisting mechanism. Since the two ends of the elastic part to be processed have been clamped and fixed by the clamping mechanism, it is necessary to set a displacement compensation mechanism to adapt to the distance change between the clamping points of the first and second clamping mechanisms, that is, the clamping assembly I of the first clamping mechanism will move a small displacement towards the second clamping mechanism, thereby compensating for the required reduction in the distance between the two clamping mechanisms. When the sliding drive mechanism moves the clamping assembly I of the first clamping mechanism, the head end of the movable block in the displacement compensation mechanism can contact and push the sliding seat to move, and when displacement compensation is required, the sliding seat can continue to move a small distance towards the second clamping mechanism, thereby adjusting the distance between the clamping points of the first and second clamping mechanisms to adapt to the axial length change of the part before and after processing.

[0016] Secondly, in order to realize the constant force clamping and ensure the consistent clamping position each time, the clamping force monitoring and positioning monitoring need to be realized in the whole processing process. In the present solution, a guide positioning mechanism is designed for positioning monitoring. First, the inductive sheet is extended. When the elastic part to be processed is moved to the position, the inductive sheet senses that the elastic part to be processed is moved to the position, and the inductive sheet is retracted. At this time, the elastic part to be processed is in the zero position. The sliding motor continues to push the sliding seat to move forward by a fixed distance, and the first clamping mechanism realizes automatic positioning clamping. At this time, the clamping position of the side of the part is a fixed position. In this way, automatic positioning clamping is realized. In the twisting process, the clamping cylinder feeds back the torque, so that the clamping torque reaches the set value, avoiding the problem of too small or too large clamping force in the twisting process, preventing the loosening or clamping damage of the part during processing. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a perspective view of the twisting forming device of the present application. Figure 2 It is a sectional view of the twisting forming device of the present application. Figure 3 It is a structural view of the first clamping mechanism in the present application. Figure 4 It is a structure of the second clamping mechanism and the twisting mechanism in the present application Figure 1 ; Figure 5 It is a structure of the second clamping mechanism and the twisting mechanism in the present application Figure 2 ; Figure 6 It is a sectional view of the first clamping mechanism in the present application. Figure 7 It is a sectional view of the second clamping mechanism in the present application. Figure 8 It is a structural view of the elastic part to be processed (before twisting) in the present application. Figure 9 It is a structural view of the twisted elastic part (after twisting) in the present application. Figure 10 It is a schematic diagram of the clamping torque monitoring software interface in the present application. Figure 11 It is a clamping torque data acquisition curve interface diagram in the present application. Mark in the figure: 1. First clamping mechanism, 11. Fixed seat I, 12. Sliding seat, 121. Slotted, 13. Fixed shaft, 14. Pneumatic clamping jaw, 15. Auxiliary clamping jaw, 16. Mandrel I, 17. Sliding block I, 18. Slide rail, 19. Outer ring sleeve; 2. Second clamping mechanism, 20. Clamping cylinder, 21. Fixed seat II, 22. Rotary disc, 221. Gear end, 222. Rotary disc end, 223. Outer ring gear, 224. Mounting seat, 23. Conical head, 231. Conical surface, 24. Pressing rod, 241. Pressing head, 25. Mounting ring, 26. Pulley, 27. Through hole I, 28. Through hole II, 29. Mandrel II, 210. Return spring; 3. Twisting mechanism, 31. Drive rack, 32. Twisting cylinder, 33. Sliding block II, 34. Slotted track; 4. Sliding drive mechanism, 41. Sliding motor, 42. Lead screw, 43. Nut driving block, 44. Support seat, 45. Synchronous belt, 46. Protective cover; 5. Displacement compensation mechanism, 51. Moving block, 52. Elastic member, 53. Tail seat; 7. Conduction positioning mechanism, 71. Conduction positioning cylinder, 72. Positioning shaft, 73. Induction sheet; 100. Elastic part to be processed, 101. First end ring, 102. Second end ring, 103. Straight connecting spring piece, 104. Twisting connecting spring piece, 200. Twisted elastic part. DETAILED DESCRIPTION

[0019] The present application will now be described in greater detail by way of example only with reference to the accompanying drawings. It is to be understood that the figures illustrate only typical embodiments of the present application and therefore should not be considered to limit the scope of the present application in any way. Wherever possible, like reference numerals have been used throughout the drawings to refer to like parts and elements.

[0020] It should be noted that unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meaning understood by a person with ordinary skill in the art to which the present application belongs. The "one", "a" or "the" and similar words used in the present patent application specification and claims do not represent quantity limitation, but indicate the existence of at least one. The "including" or "containing" and similar words indicate that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, but do not exclude other elements or objects with the same function.

[0021] Before introducing the present scheme, first, the structure of a typical structure of the elastic part to be processed 100 in the present scheme is exemplified, the elastic part to be processed 100 is of metal material, as shown in the figure, Figure 8For the structure of the part before processing, it has a first end ring 101 and a second end ring 102, and a straight connecting spring piece 103 is arranged between the first end ring 101 and the second end ring 102. The torsion forming device of the scheme can fix and clamp the first end ring 101 and the second end ring 102 respectively, and then twist the two ends to twist and form the elastic part 100 to be processed. The straight connecting spring piece 103 is twisted to the torsion connecting spring piece 104 with a certain torsion angle as shown in the figure, so as to obtain the torsion elastic part 200. Figure 9

[0022] As shown in the figure, the embodiment provides a coiled elastic part clamping force monitoring torsion forming device, which comprises a first clamping mechanism 1, a second clamping mechanism 2 and a torsion mechanism 3. The first clamping mechanism 1 and the second clamping mechanism 2 are respectively used for clamping and fixing the two ends of the elastic part 100 to be processed. The first clamping mechanism 1 comprises a fixed seat Ⅰ 11, a sliding seat 12 and a clamping assembly Ⅰ arranged on the sliding seat 12, which is used for clamping and fixing the first end of the elastic part 100 to be processed. The second clamping mechanism 2 comprises a fixed seat Ⅱ 21, a rotating disc 22 and a clamping assembly Ⅱ installed on the rotating disc 22. The clamping assembly Ⅱ is used for clamping and fixing the second end of the elastic part 100 to be processed. The first clamping mechanism 1 is a moving position, the second clamping mechanism 2 is a fixed position, the torsion mechanism 3 is arranged at the second clamping mechanism 2 and is used for driving the clamping assembly Ⅱ to rotate, so as to realize the torsion forming of the elastic part 100 to be processed. The scheme considers that the axial length of the elastic part 100 to be processed will be shortened after torsion forming, so it is further needed to compensate the displacement of the shortened length, so that the clamping point spacing of the first clamping mechanism 1 and the second clamping mechanism 2 is adaptively changed after the torsion of the elastic part 100 to be processed. The torsion forming device in the scheme can solve the positioning, clamping and rotating torsion functions of the hollow thin-walled parts in the non-standard equipment, facilitate the subsequent processing and manufacturing of the parts, and quickly meet the production capacity.

[0023] In the scheme, the torsion mechanism 3 comprises a torsion cylinder 32, a driving rack 31 and a sliding block Ⅱ 33. The base of the torsion mechanism 3 is provided with a sliding groove track 34. The torsion cylinder 32 is fixed on the base, the telescopic rod end thereof is fixedly connected with the driving rack 31, the driving rack 31 is a straight rack, it is engaged with the outer gear ring 223 of the rotating disc 22, so as to drive the clamping assembly Ⅱ to rotate. The working principle of the torsion cylinder 32 is that the torsion cylinder 32 drives the driving rack 31 to move, the driving rack 31 drives the rotating disc 22 to rotate, so as to drive the clamping assembly Ⅱ to rotate, and the whole realizes the rotating torsion function of the elastic part 100 to be processed. In order to better ensure the stability of linear motion, the sliding block Ⅱ 33 adopts a T-shaped sliding block, and the sliding groove track 34 has a T-shaped sliding groove structure, so as to adaptively cooperate with the sliding block Ⅱ 33.

[0024] ​The typical embodiment of the present application further comprises a sliding driving mechanism 4 for driving the clamping assembly I of the first clamping mechanism 1 to move towards or away from the second clamping mechanism 2, the sliding driving mechanism 4 comprises a sliding motor 41, a lead screw 42, a nut driving block 43 and a support seat 44, the sliding motor 41 and the support seat 44 are fixedly installed on the fixed seat I 11, wherein the first end of the lead screw 42 is connected with the driving end of the sliding motor 41, the second end of the lead screw 42 is rotatably arranged on the support seat 44, the support seat 44 is a bearing seat, the support seat 44 is rotatably connected with the lead screw 42, the nut driving block 43 adopts a lead screw nut, so as to realize cooperation with the external thread of the lead screw 42, when the lead screw 42 rotates, the nut driving block 43 can move along the length direction of the lead screw 42.

[0025] The displacement compensation mechanism 5 comprises a movable block 51 and an elastic member 52, the elastic member 52 comprises one or more parallel arranged springs, wherein the movable block 51 is slidably installed in the sliding groove 121 at the tail of the sliding seat 12, the movable block 51 is fixedly connected with the nut driving block 43, the movable block 51 is located at the head end side of the nut driving block 43 and is screw connected therewith, and a cavity for the lead screw 42 to pass through is formed in the movable block 51, the movable block 51 does not contact with the lead screw 42, the elastic member 52 is located in the sliding groove 121, the first end of the elastic member 52 abuts against the clamping groove of the movable block 51, the second end is connected with the clamping groove of the tail seat 53, the tail seat 53 is arranged at the slot opening of the sliding groove 121 and is detachably connected, fixedly connected or integrally arranged with the sliding seat 12, the clamping grooves at both ends can realize fixed arrangement of the elastic member 52. In an embodiment of the present application, the bottom sides of the sliding seat 12 are respectively provided with sliding blocks I 17, the sliding blocks I 17 are slidably arranged on a pair of sliding rails 18 on the end face of the fixed seat I 11. The sliding seat 12 comprises a bottom plate, a vertical plate and a rib plate, wherein the vertical plate is vertically arranged on the bottom plate, the rib plate is arranged at the connection between the vertical plate and the bottom plate, so as to play a certain reinforcing role, and the clamping assembly I is installed on the vertical plate. In the scheme, the sliding motor 41 is located at one side of the sliding rail 18, the belt pulley of the sliding motor 41 is connected with the belt pulley at the end of the lead screw 42 through the synchronous belt 45, and the sliding motor 41 drives the lead screw 42 to synchronously rotate.

[0026] The cooperation relationship and working principle of the slip driving mechanism 4 and the displacement compensation mechanism 5 are described as follows: the slip motor 41 of the slip driving mechanism 4 drives the screw rod 42 to rotate, and the nut driving block 43 moves along the axial direction on the screw rod 42, the nut driving block 43 is fixedly connected with the movable block 51, thus the nut driving block 43 and the movable block 51 move synchronously, and the head end side of the movable block 51 can abut against the sliding seat 12, at this time the movable block 51 is located at the driving position in the sliding groove 121 and moves towards the head end direction, the slip motor 41 drives the sliding seat 12 to move, so that the clamping assembly I of the first clamping mechanism 1 approaches the second clamping mechanism 2; during the twisting process, the slip motor 41 stops driving, at this time the axial direction is gradually shortened due to the structural deformation of the elastic part 100 to be processed during the twisting forming process, the sliding seat 12 needs to continue to move a certain distance towards the second clamping mechanism 2 for displacement compensation, thus during the twisting process, the nut driving block 43 and the movable block 51 are stationary, and the sliding seat 12 continues to move a small distance towards the second clamping mechanism 2, the power source of the small distance movement of the sliding seat 12 is the tension generated by the axial shortening of the elastic part 100 to be processed during the twisting process, the displacement compensation is realized by compressing the elastic member 52, at this time the head end side of the movable block 51 is separated from the sliding seat 12, and the elastic member 52 is compressed.

[0027] In the embodiment, the rotating disc 22 comprises a coaxial gear end 221 and a rotating disc end 222, wherein the gear end 221 is a disc structure, the disc outer edge of the gear end 221 is provided with an outer gear ring 223, the main body of the rotating disc end 222 is a disc, the head end side of the rotating disc end 222 is provided with a clamping assembly II, the clamping assembly II comprises a pressing rod 24, a mounting ring 25, a pulley 26 and a reset spring 210, wherein the mounting ring 25 is located at the center position of the end face of the rotating disc end 222, the rotating disc 22 is provided with a hole for the pressing rod 24 to pass through, the head end of the pressing rod 24 is fixedly provided with a pressing head 241, the tail end of the pressing rod 24 is rotatably provided with the pulley 26, the middle segment of the pressing rod 24 is hingedly installed at the hinge of the mounting ring 25, wherein the force arm of the pressing rod 24 from the hinge point to the side of the pressing head 241 is a first force arm, the force arm of the pressing rod from the hinge point to the side of the pulley 26 is a second force arm, the second force arm is longer than the first force arm, because the force arm of one end of the pulley 26 is longer than the force arm of one end of the pressing head 241, so as to play a role of amplifying the clamping force, the force arm is the vertical distance from the hinge point to the force line of the corresponding side. The reset spring 210 in an annular structure is arranged between the hinge point of the pressing rod 24 and the pulley 26, the reset spring 210 is connected end to end and surrounds the recess outside all the pressing rods 24, the recess outside the pressing rod 24 is located on the tail end side of the hinge point, when the push rod of the clamping cylinder 20 retreats and drives the axial movement of the conical head 23, with the retreat of the conical head 23, the reset spring 210 shrinks to the center and pulls the tail end of the pressing rod 24, so as to realize the reset of the pressing rod 24, so that one end of the pulley 26 shrinks to the center and one end of the pressing head 241 opens, so as to facilitate the taking down of the parts and the placement of the next part processing. The base of the clamping cylinder 20 is fixed on the end face of the gear end 221 of the rotating disc 22 through the mounting seat 224, and the piston end of the clamping cylinder 20 extends to the rotating disc 22 and is fixedly installed with the conical head 23.

[0028] The scheme considers that in order to realize multi-point clamping, one conical head 23 corresponds to the application force point of multiple pressure heads 241, the thrust of the conical head 23 is distributed to multiple pressure heads 241, and the force effect needs a large force to meet the clamping needs, which requires a higher overall equipment and increases the equipment manufacturing cost and operation cost. Therefore, in the scheme, in order to better realize the clamping and fixing effect and save the equipment cost and operation cost, the scheme amplifies the application force of the conical head 23 to a certain extent, so that the clamping cylinder 20 only needs to apply a small force to meet the clamping and fixing needs in a certain range, and the clamping effect is firm. The scheme realizes the amplification of the applied force through the following measures: first, through the design of the taper of the conical surface of the conical head 23, the conical head 23 realizes 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 effect, and within a certain range, the smaller the taper of the conical head 23, the better the amplification effect of the thrust of the clamping cylinder 20. Second, in order to further realize the amplification of the force, the force arms of both ends of the pressure rod 24 are designed, for example, the force arm length of the force applying end of the pulley 26 is greater than the force arm length of one end of the pressure head 241, so that the hinge point of the pressure rod 24 can be used as a support point to realize the secondary amplification of the applied force of the conical head 23. Although only one conical head 23 is used as the application force point to realize multi-point clamping, the clamping force of each clamping point of the pressure head 241 is effectively amplified, so that the clamping effect of the clamping assembly on the elastic part is ensured by a smaller applied force. It needs to be clear that only through the amplification of the pressure rod 24, a certain degree of force amplification can also be realized, thereby providing a clamping and fixing prerequisite for the next step of torsional forming.

[0029] In the scheme, the elastic part 100 to be processed is taken as an example. In the case of a certain diameter of the elastic part 100 to be processed, the shorter the length of the straight connecting spring leaf 103, the greater the required torsional force, and the greater the required clamping fixing force. In order to adapt to the processing needs of different length specifications of parts, realize one machine with multiple functions, reduce equipment cost and improve equipment versatility, the conical head 23 can be disassembled and replaced with different specifications, so that the conical head 23 is designed through different conical surfaces, and is suitable for the processing and manufacturing of elastic parts 100 to be processed with different length sizes. The conical head 23 and the telescopic rod of the clamping cylinder 20 are connected in a threaded manner, and the clamping cylinder 20 is a servo cylinder. Since the other end of the conical head 23 only has a contact action with the pulley 26, it is very convenient to disassemble and replace the conical head 23 with a conical head 23 part with different taper. Through the contact cooperation of the conical head 23 and the pulley 26, the clamping force is transmitted, and the effect of multi-point clamping is finally achieved, preventing the elastic part 100 to be processed from being clamped. In addition, the design of the scheme simplifies the structure of the clamping mechanism to a certain extent, and different tapers of the conical head 23 can be selected for processing according to different specifications of the elastic part 100 to be processed. It is convenient to assemble and disassemble, preferably, the conical head 23 and the telescopic rod of the clamping cylinder 20 are connected in a threaded manner, and only need to be screwed to realize the quick replacement of the conical head 23, so as to adapt to the processing of different structure parts and improve the versatility of the equipment.

[0030] In the scheme, the pressure head 241 of the pressure rod 24 cooperates with the mandrel II 29 to have a large opening gap. For a specific non-standard part to be processed, for example, the inner diameter holes at both ends of a certain type of non-standard part to be processed are the same, and the outer diameters at both ends of the non-standard part to be processed are small at one end and large at the other end. The part with the specific structure has a thin wall thickness at one end, which can be clamped and fixed by the first clamping mechanism 1, and the part with a thick wall thickness at the other end is fixed by the second clamping mechanism 2. Therefore, the clamping assembly II adapts to different structures of non-standard parts to be processed, thereby improving the versatility of the equipment. In addition, the mandrel II 29 is installed on the rotating disc 22 through threaded connection and can be disassembled and replaced with a mandrel II 29 with different diameters, so as to adapt to different inner hole diameters of the parts to be processed, and further improve the structural versatility and adaptability of the equipment.

[0031] In the second clamping mechanism 2, the multi-point clamping mechanism adopts the principle of pressure rod and inclined surface, which amplifies the small horizontal thrust twice through the inclined surface and the pressure rod 24 and converts it into clamping force. At the same time, according to the size of the clamping force, the required taper angle is calculated and designed to meet the clamping force requirement. The taper design method not only amplifies the clamping force, but also designs different taper angles of the thrust rod according to the clamping force requirement, so that the overall structure design is simplified and clear.

[0032] The embodiment is also provided with a conduction positioning mechanism 7. In order to realize automatic control in the whole twisting operation process, the scheme detects whether the elastic part 100 to be processed is installed in place through the conduction positioning mechanism 7. The conduction positioning mechanism 7 includes a conduction positioning cylinder 71, a positioning shaft 72 and an inductive sheet 73. The conduction positioning cylinder 71 is fixedly arranged at the tail end of the clamping cylinder 20. The conduction positioning cylinder 71 adopts a pneumatic cylinder. The tail end of the positioning shaft 72 is connected with the telescopic rod of the conduction positioning cylinder 71. The head end of the positioning shaft 72 penetrates through the through hole I 27 of the clamping cylinder 20 and the taper head 23 in turn, and then penetrates out through the center hole of the mandrel II 29 after penetrating through the through hole II 28 of the second clamping mechanism 2. The inductive sheet 73 is arranged on the positioning shaft 72 in a threaded connection mode or an inlaying mode. The inductive sheet 73 is used for detecting whether the elastic part 100 to be processed is clamped in place. In the scheme, the positioning shaft 72 is made of a non-metallic material, and the inductive sheet 73 is made of a metal material. The conduction positioning cylinder 71 is provided with a proximity switch for detecting the position. The working principle is as follows: the conduction positioning cylinder 71 drives the positioning shaft 72 and the inductive sheet 73 to move, so that the inductive sheet 73 is pulled away from the mandrel I 16 by a distance (to avoid the influence of the mandrel I 16 made of a metal material on the inductive sheet 73). When the inductive sheet 73 senses the signal of the elastic part 100 to be processed, it is the clamping zero point of the elastic part 100 to be processed at this time. Taking the clamping zero point position as the zero point position, the inductive sheet 73 retreats, and the slip 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 end part of the elastic part 100 to be processed is fixed. Therefore, the above-mentioned conduction positioning mechanism 7 can automatically realize that the clamping positions of different elastic parts 100 to be processed are consistent. In the scheme, the conduction positioning cylinder 71 is provided with a pneumatic cylinder magnetic proximity switch for detecting the moving position of the piston, so as to determine the extension position of the positioning shaft 72. Through double detection and accurate feedback, the product is accurately positioned in the axial direction, and the consistency of the clamping position of the product each time is ensured. The double detection means that: on the one hand, the piston position of the conduction positioning cylinder 71 is positioned through the pneumatic cylinder magnetic proximity switch, and on the other hand, the inductive sheet 73 at the front end of the positioning shaft 72 senses the metal signal and is conducted. Through the above two signals, double positioning is realized, which can avoid incorrect judgment of the clamping position of the elastic part 100 to be processed according to a single signal. For example, it can avoid the situation that only the piston position of the conduction positioning cylinder 71 is in place, but the front end of the elastic part 100 to be processed is not in place. The situation can be prompted through alarm and the like, so as to more accurately judge whether the clamping of the elastic part 100 to be processed is in place, so as to better realize the clamping consistency. When the elastic part 100 to be processed reaches the predetermined clamping position, the clamping assembly II clamps and fixes the elastic part 100 to be processed, and prepares for twisting processing.

[0033] In the scheme, the clamping assembly I includes the pneumatic clamping jaw 14 and the mandrel I 16 arranged in the pneumatic clamping jaw 14, the mandrel I 16 is located at the axial center of the pneumatic clamping jaw 14, and the pneumatic clamping jaw 14 and the mandrel I 16 clamp and fix the end of the elastic part to be processed 100 from the inside and outside. The mandrel I 16 is used to support the hollow structure of the elastic part to be processed 100, the outer taper surface of the pneumatic clamping jaw 14 cooperates with the inner taper surface of the outer ring 19, when the pneumatic clamping jaw 14 is contracted, based on the cooperation of the inner and outer taper surfaces, the pneumatic clamping jaw 14 is clamped to the center and moves radially, the auxiliary clamping jaw 15 can be made of elastic material, such as rubber material. The pneumatic clamping jaw 14 clamps and fixes the elastic part to be processed 100 from the outside of multiple sides by extruding the auxiliary clamping jaw 15.

[0034] In the scheme, the pushing of the clamping cylinder 20 drives the conical head 23 to move the pulley 26, the pushing force is amplified through the cooperation of the conical surface 231 and the pressure rod 24, the hollow part of the elastic part is supported by the mandrel II 29, the clamping cylinder 20 realizes the process monitoring and feedback of the output force during the pushing process, and then realizes the monitoring and feedback of the clamping force, and controls the clamping force during the clamping process of the hollow part.

[0035] In the scheme, through data acquisition of the clamping cylinder 20, the torque monitoring and control interface is as shown in Figure 10 The real-time torque is output and fed back by the servo cylinder, and the data acquisition and real-time torque monitoring are realized by the PLC control system, the torque size is set, when the monitored torque reaches the set torque, the torque reaches the set requirement. The design software is used to collect test process data and analyze the force value, which is used as a reference for setting the force value in the production process of product parts, and provides data support for the production of other product parts. During the data detection process, a plurality of torque values are collected, according to a plurality of values after the lifting to the position, and the average value of these values is taken as the calculation result torque value. The design software is used to collect test process data and analyze the force value, which is used as a reference for setting the force value in the production process of product parts, and provides data support for the production of other product parts (refer to Figure 11 ).

[0036] In the scheme, the working principle is as follows: the first clamping mechanism 1 clamps the first end of the elastic part 100 to be processed through artificial or machine loading, the sliding motor 41 in the sliding driving mechanism 4 drives the nut driving block 43 to move through the lead screw 42, and the nut driving block 43 is pressed in the sliding groove 121 of the sliding seat 12, the clamping assembly I of the first clamping mechanism 1 is pushed to slide in the direction close to the second clamping mechanism 2, the inductive sheet 73 on the positioning mechanism 7 is extended to the head end, the inductive sheet 73 on the positioning mechanism 7 detects that the elastic part 100 to be processed moves to the position, and the sliding motor 41 continues to push forward to move a certain distance with the point as the zero position, the pressure rod 24 drives the pressure head 241 to realize positioning and clamping at the core shaft II 29, the output force of the clamping cylinder 20 is used to control the clamping force on the part to be set to a certain value, so that the constant force clamping is realized, and the inductive sheet 73 on the positioning mechanism 7 needs to be retracted to avoid interference with the twisting process. Then the twisting mechanism 3 drives the rotating disc 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 piece 103 of the elastic part 100 to be processed is twisted to form a twisted connecting spring piece 104, so that a twisted elastic part 200 is obtained. Because the axial length of the elastic part 100 to be processed will be shortened to a certain extent during the processing into the twisted elastic part 200, during the twisting process, the sliding seat 12 will automatically move forward to the direction close to the second clamping mechanism 2, so as to realize the self-adaptive adjustment of the distance between the clamping fixed points of the first clamping mechanism 1 and the second clamping mechanism 2.

[0037] The above is only the preferred embodiment of the present application, not any form of limitation on the present application, although the present application has been disclosed as above, however, it is not intended to limit the present application, any skilled person in the art, without departing from the technical solution of the present application, can make some changes or modifications of the equivalent embodiments by using the disclosed technical content, but as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, all still belong to the scope of the technical solution of the present application.

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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