A variable-diameter spring processing device

Abstract

The present application provides a variable diameter spring processing device, which relates to the field of spring processing technology. A variable diameter spring processing device includes a mounting frame, on which a cutter head, a driving mechanism, a straightening mechanism, a pitch changing mechanism, a diameter reducing mechanism, and a cutting mechanism are provided. The cutting mechanism includes a slide, a fixed seat, a lifting assembly, a pressure head, and a clamping block. The clamping block is provided with an inclined portion on the side away from the pressure head, and an inclined block is provided on the side of the clamping block facing the pressure head. The clamping block is pre-inserted between the tail coil and the penultimate coil of the variable diameter spring, forcing the pitch of the tail coil and the penultimate coil of the variable diameter spring to temporarily increase, and limiting the position of the tail coil of the variable diameter spring on the cutting head to prevent the tail coil of the variable diameter spring from leaving the range of the cutting head. The inclined block causes the tail coil steel wire of the variable diameter spring to move toward the center of the pressure head, so that the pressure head can completely press the steel wire when it moves downward, preventing the crimping position from deviating to one side of the pressure head, thereby improving the cutting efficiency and reducing the load on the pressure head.

Description

Technical Field

[0001] This application relates to the technical field of spring processing, and more specifically, to a variable-diameter spring processing device. Background Art

[0002] In the prior art, for example, a spring machine for the production and processing of variable-diameter springs disclosed in CN118080741A includes a spring machine main body, on which a straightening mechanism, a variable-diameter mechanism, a pitch change mechanism, and a cutting mechanism are provided. The cutting mechanism includes a tool, a mounting seat, a pressing head, and a driving assembly.

[0003] This solution uses the mounting seat and the driving assembly to control the movement trajectory of the pressing head, so that when the pressing head moves downward first, it avoids the second wire loop at the end of the variable-diameter spring, preventing premature contact with the second wire loop and causing distortion of the variable-diameter spring. Then, the pressing head extends into the gap between the end loop of the variable-diameter spring and the second loop at the end of the variable-diameter spring, ensuring that the pressing head can completely cover the wire of the end loop of the variable-diameter spring, avoiding wear of the variable-diameter spring by the pressing head and problems such as spring distortion or eccentricity caused by squeezing the variable-diameter spring, effectively improving the processing quality of the variable-diameter spring. At the same time, it also avoids unnecessary wear between the pressing head and the second wire loop at the end of the variable-diameter spring, and improves the service life of the pressing head.

[0004] However, in this solution, when dealing with a variable-diameter spring with a relatively small pitch and a relatively small diameter change, it is very difficult for the pressing head to extend into the gap between the end loop of the variable-diameter spring and the second loop at the end of the variable-diameter spring. At this time, it is very difficult for the pressing head to achieve separate coverage of the end loop of the variable-diameter spring. Secondly, in the production of this type of variable-diameter spring, even if the pressing head in this solution extends into the gap between the end loop of the variable-diameter spring and the second loop at the end of the variable-diameter spring, due to the influence of the extension depth of the pressing head, the coverage of the end loop of the variable-diameter spring by the pressing head is relatively off. At this time, when cutting the variable-diameter spring, the load on the pressing head is relatively serious, and it may also cause the spring to slip from the bottom end of the pressing head due to the relatively off coverage position, resulting in cutting failure. Summary of the Invention

[0005] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides a variable-diameter spring processing device, including a mounting frame, on which a tool bit, a driving mechanism, a straightening mechanism, a pitch changing mechanism, a variable-diameter mechanism and a cutting mechanism are arranged. The pitch changing mechanism can perform displacement actions of approaching and moving away relative to the mounting frame; the variable-diameter mechanism can perform displacement actions of approaching and moving away relative to the mounting frame, and the variable-diameter mechanism can achieve an angular change on the mounting frame; the cutting mechanism includes a sliding seat, a fixed seat, a lifting component, a pressing head and a clamping block. The sliding seat displaces axially along the tool bit, the fixed seat is fixedly connected to the sliding seat, the lifting component is slidably matched with the fixed seat, the lifting component displaces radially along the tool bit, the pressing head is fixedly connected to the lifting component, the clamping block is slidably matched with the lifting component, and the clamping block displaces radially along the tool bit; on the side of the clamping block away from the pressing head, there is an inclined surface portion, and on the side of the clamping block facing the pressing head, there is an inclined block. The inclined block and the inclined surface portion make the end of the clamping block facing the tool bit be pointed.

[0006] Preferably, the pitch changing mechanism includes a linear displacement component, a driving motor, a base and a pitch adjusting block. The linear displacement component is fixedly connected to the mounting frame; the driving motor is fixedly connected to the displacement end of the linear displacement component; the base is slidably connected to the mounting frame, the output shaft of the driving motor penetrates through the base and is key-connected with a driving gear, and the driving gear is rotatably connected to the base; the pitch adjusting block is slidably installed in the base along the radial direction of the tool bit, and a driven rack is arranged on one side of the pitch adjusting block, and the driven rack meshes with the driving gear.

[0007] Preferably, two variable-diameter mechanisms are symmetrically arranged, and the structural sizes of the two variable-diameter mechanisms are the same. The variable-diameter mechanism includes: a variable-diameter rod, a first telescopic member, a mounting block, a connecting seat, a second telescopic member and a third telescopic member. The variable-diameter rod is coaxially fixedly connected to the piston end of the first telescopic member. The first telescopic member is fixedly connected to the mounting block for controlling the variable-diameter rod to displace radially along the tool bit. An arc-shaped groove is arranged on the mounting frame, the connecting seat penetrates through the arc-shaped groove, the mounting block is slidably sleeved on the connecting seat, the second telescopic member is rotatably connected to the mounting frame and fixedly connected to the connecting seat, the second telescopic member is used for controlling the connecting seat to displace along the arc-shaped groove, the third telescopic member is fixedly connected to the connecting seat, and the piston end of the third telescopic member slidably penetrates through the connecting seat and is fixedly connected to the mounting block.

[0008] Preferably, a fourth telescopic member is fixedly connected to the sliding seat, and the fourth telescopic member is used for driving the lifting component to displace radially along the tool bit.

[0009] Preferably, a slide groove is provided in the fixed seat, and the lifting assembly slides in the slide groove. The lifting assembly includes a first lifting block and a second lifting block, and the second lifting block extends out of the slide groove. A connecting slide cavity is provided on the same side of the first lifting block and the second lifting block, and positioning grooves are symmetrically provided in the slide cavity on the first lifting block.

[0010] Preferably, the pressure head is arranged in an L-shape, and one end of the pressure head is fixedly connected to a mounting rod.

[0011] Preferably, one end of the clamping block away from the inclined portion and the inclined block is symmetrically fixed with two positioning bars, and the positioning bars are slidably fitted in the positioning grooves.

[0012] Preferably, the vertical shadow of the pressure head covers the inclined block.

[0013] Preferably, a fifth telescopic member is fixedly connected to the fixing seat, and the fifth telescopic member is used to drive the clamping block to move radially along the cutter head.

[0014] Preferably, a sixth telescopic member is fixedly connected to the mounting frame, and the sixth telescopic member is used to drive the slide to move axially along the tool head on the mounting frame.

[0015] The beneficial effects of the present invention are:

[0016] 1. The independent displacement of the clamping block can be pre-inserted into the gap between the tail coil and the penultimate coil of the variable diameter spring, forcing the pitch between the tail coil and the penultimate coil of the variable diameter spring to temporarily increase, and limiting the position of the tail coil of the variable diameter spring on the cutter head, which can prevent the steel wire of the tail coil of the variable diameter spring from escaping from the cutter head range;

[0017] 2. The inclined block can be used to move the tail coil wire of the variable diameter spring to the center of the bottom end of the pressure head. When the pressure head moves downward and cooperates with the cutter head to cut the wire, the wire can be completely pressed, preventing the crimping position from deviating to one side of the pressure head, improving the cutting efficiency and reducing the load on the pressure head;

[0018] 3. The displacement of the slide along the axial direction of the cutter head can correct the crimping range of the pressure head, avoid large deviations between the pressure head and the tail ring wire of the variable diameter spring, and improve the centering effect of the bevel block on the wire.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0021] Figure 1 is the overall structural schematic diagram of a variable-diameter spring processing device according to an embodiment of the present application Figure 1 ;

[0022] Figure 2 is the overall structural schematic diagram of a variable-diameter spring processing device according to an embodiment of the present application Figure 2 ;

[0023] Figure 3 is the partial structural schematic diagram of a variable-diameter spring processing device according to an embodiment of the present application;

[0024] Figure 4 is according to an embodiment of the present application Figure 1 the enlarged schematic diagram of A in;

[0025] Figure 5 is the partial structural schematic diagram of the variable-diameter mechanism according to an embodiment of the present application;

[0026] Figure 6 is the partial structural schematic diagram of the cutting mechanism according to an embodiment of the present application;

[0027] Figure 7 is the structural explosion diagram of the cutting mechanism according to an embodiment of the present application;

[0028] [[ID=3�]] Figure 8 is the partial structural explosion diagram of the cutting mechanism according to an embodiment of the present application;

[0029] Figure 9 is the structural explosion diagram of the pressure head and the clamping block according to an embodiment of the present application;

[0030] Figure 10 is the structural schematic diagram of the pressure head and the clamping block from three perspectives according to an embodiment of the present application;

[0031] Figure 11 is the structural schematic diagram of the auxiliary mechanism according to an embodiment of the present application;

[0032] Figure 12 is the partial structural schematic diagram of the auxiliary mechanism according to an embodiment of the present application;

[0033] Figure 13 is the position schematic diagram of the quick-release mechanism according to an embodiment of the present application;

[0034] Figure 14 is a schematic structural diagram of a quick-release mechanism according to an embodiment of the present application;

[0035] Figure 15 is a schematic internal structure diagram of a second lifting block according to an embodiment of the present application.

[0036] Icons: 1, mounting bracket; 11, cutter head; 12, arc groove; 2, driving mechanism; 3, straightening mechanism; 4, pitch change mechanism; 41, linear displacement component; 42, driving motor; 421, driving gear; 43, base; 44, pitch adjustment block; 441, driven rack; 5, diameter change mechanism; 51, diameter change rod; 52, first telescopic member; 53, mounting block; 54, connecting seat; 55, second telescopic member; 56, third telescopic member; 6, cutting mechanism; 61, sliding seat; 62, fourth telescopic member; 621, connecting plate; 622, support rod; 63, fixed seat; 631, sliding groove; 64, lifting assembly; 641, first lifting block; 642, second lifting block; 643, sliding cavity; 644, positioning groove; 645, through groove; 646, mounting cavity; 647, limiting block; 648, deformation cavity; 649, through slot; 65, pressing head; 651, mounting rod; 66, clamping block; 661, positioning strip; 662, inclined surface portion; 663, inclined block; 67, fifth telescopic member; 671, connecting block; 68, sixth telescopic member; 7, auxiliary mechanism; 71, elastic component; 711, fixed cylinder; 7l2, sliding rod; 713, first spring; 72, limiting cover; 721, arc block; 722, arc notch; 8, quick-release mechanism; 81, limiting plate; 82, positioning rod; 83, second spring. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] Embodiment 1, as Figures 1 - 15 shown, a diameter change spring processing device according to an embodiment of the present application includes a mounting bracket 1. A cutter head 11, a driving mechanism 2, a straightening mechanism 3, a pitch change mechanism 4, a diameter change mechanism 5, and a cutting mechanism 6 are provided on the mounting bracket 1. It should be noted that the driving mechanism 2 is used for the straightening mechanism 3 and Figure 1Power is provided to the marked conveying end on the left side, and the driving mechanism 2 and the straightening mechanism 3 are both prior arts and will not be elaborated here.

[0040] In a specific embodiment of the present application, the pitch change mechanism 4 can perform displacement actions of approaching and moving away relative to the mounting frame 1, further enhancing the adjustment range of the pitch of the variable-diameter spring by the pitch change mechanism 4.

[0041] Specifically, as Figure 3 and Figure 4 shown, the pitch change mechanism 4 includes a linear displacement component 41, a driving motor 42, a base 43, and a pitch adjustment block 44. The linear displacement component 41 is fixedly connected to the mounting frame 1; the driving motor 42 is fixedly connected to the displacement end of the linear displacement component 41; the base 43 is slidably connected to the mounting frame 1, and the output shaft of the driving motor 42 penetrates through the base 43 and is key-connected with a driving gear 421, and the driving gear 421 is rotatably connected to the base 43; the pitch adjustment block 44 is slidably installed in the base 43 along the radial direction of the tool head 11, and a driven rack 441 is arranged on one side of the pitch adjustment block 44, and the driven rack 441 meshes with the driving gear 421. It can be understood that by driving the driving gear 421 to rotate by the driving motor 42, and then using the driven rack 441 to make the pitch adjustment block 44 perform vertical displacement on the base 43, the pitch of the variable-diameter spring in production can be adjusted. By the linear displacement component 41, the driving motor 42 can be driven to perform linear displacement, so that the base 43 performs an approaching or moving away action relative to the mounting frame 1, and then the pitch adjustment block 44 on the base 43 performs synchronous displacement, which can further change the pitch adjustment range.

[0042] In a specific embodiment of the present application, the variable-diameter mechanism 5 can perform displacement actions of approaching and moving away relative to the mounting frame 1, and the variable-diameter mechanism 5 can realize angle change on the mounting frame 1, enhancing the adaptability of the variable-diameter mechanism 5 to different variable-diameter springs.

[0043] Specifically, as Figure 1 、 Figure 3 and Figure 5As shown in the figure, there are two variable-diameter mechanisms 5 symmetrically arranged, and the two variable-diameter mechanisms 5 have the same structural size. The variable-diameter mechanism 5 includes: a variable-diameter rod 51, a first telescopic member 52, a mounting block 53, a connecting seat 54, a second telescopic member 55, and a third telescopic member 56. The variable-diameter rod 51 is coaxially fixed to the piston end of the first telescopic member 52. The first telescopic member 52 is fixed to the mounting block 53 for controlling the radial displacement of the variable-diameter rod 51 along the cutting head 11. An arc-shaped groove 12 is provided on the mounting frame 1. The connecting seat 54 penetrates through the arc-shaped groove 12. The mounting block 53 is slidably sleeved on the connecting seat 54. The second telescopic member 55 is rotatably connected to the mounting frame 1 and fixed to the connecting seat 54. The second telescopic member 55 is used for controlling the displacement of the connecting seat 54 along the arc-shaped groove 12. The third telescopic member 56 is fixed to the connecting seat 54. The piston end of the third telescopic member 56 slidably penetrates through the connecting seat 54 and is fixed to the mounting block 53. It can be understood that the third telescopic member 56 can drive the mounting block 53 to axially displace relative to the connecting seat 54, so that the variable-diameter rod 51 will axially displace along the cutting head 11. And the design of the two variable-diameter mechanisms 5 in this application can further ensure the stability and quality of the variable-diameter spring during the production process. Further, it can be understood that the second telescopic member 55 can drive the connecting seat 54 to displace along the arc-shaped groove 12, so that the variable-diameter rod 51 will change the angle relative to the cutting head 11, further improving the stability and quality of the variable-diameter spring production. The first telescopic member 52 can drive the variable-diameter rod 51 to radially displace along the cutting head 11, so that the variable-diameter rod 51 can adapt to the change of different diameters of each turn of the variable-diameter spring.

[0044] It should be noted that in the specific embodiment of this application, the mounting block 53 can only axially displace on the connecting seat 54 and cannot rotate.

[0045] In the specific embodiment of this application, as Figures 6 - 10 shown, the cutting mechanism 6 includes a sliding seat 61, a fixed seat 63, a lifting assembly 64, a pressing head 65, and a clamping block 66. The sliding seat 61 axially displaces along the cutting head 11. The fixed seat 63 is fixed to the sliding seat 61. The lifting assembly 64 is slidably engaged with the fixed seat 63. The lifting assembly 64 radially displaces along the cutting head 11. The pressing head 65 is fixed to the lifting assembly 64. The clamping block 66 is slidably engaged with the lifting assembly 64. The clamping block 66 radially displaces along the cutting head 11. It can be understood that the displacement of the sliding seat 61 will drive the fixed seat 63, the lifting assembly 64, the pressing head 65, and the clamping block 66 thereon to displace synchronously and in the same direction, so that the pressing head 65 and the clamping block 66 axially displace relative to the cutting head 11, improving the specific positions of the clamping block 66 and the pressing head 65 relative to the variable-diameter spring below and improving the cutting accuracy.

[0046] Among them, a fourth telescopic member 62 is fixedly connected to the slide 61, and the fourth telescopic member 62 is used to drive the lifting assembly 64 to move radially along the cutter head 11. Specifically, the piston end of the fourth telescopic member 62 is fixedly connected to a connecting plate 621, and one end of the connecting plate 621 is fixedly connected to a support rod 622, and the support rod 622 is fixedly connected to the lifting assembly 64.

[0047] A slide groove 631 is provided in the fixing seat 63 , and the lifting assembly 64 slides in the slide groove 631 . It should be noted that the lifting assembly 64 can and can only be lifted and slid along the slide groove 631 in the fixing seat 63 to achieve height changes.

[0048] Specifically, the lifting assembly 64 includes a first lifting block 641 and a second lifting block 642. The second lifting block 642 extends out of the slide groove 631. A connected slide cavity 643 is provided on the same side of the first lifting block 641 and the second lifting block 642. Positioning grooves 644 are symmetrically provided in the slide cavity 643 on the first lifting block 641.

[0049] Furthermore, the pressure head 65 in the present application is L-shaped, and one end of the pressure head 65 is fixedly connected to a mounting rod 651. For ease of understanding, as shown in FIG. Figure 9 and Figure 10 As shown, in the subsequent description, the end of the L-shaped pressing head 65 on which the mounting rod 651 is installed is described as the horizontal end, and the end of the pressing head 65 abutting against the variable diameter spring is described as the vertical end.

[0050] like Figures 7 - 10 As shown, the side of the clamping block 66 away from the pressure head 65 is provided with an inclined portion 662, and the side of the clamping block 66 facing the pressure head 65 is provided with an inclined block 663. The inclined block 663 and the inclined portion 662 make the end of the clamping block 66 facing the cutter head 11 pointed.

[0051] Furthermore, one end of the clamping block 66 away from the inclined portion 662 and the inclined block 663 is symmetrically fixed with two positioning bars 661 , and the positioning bars 661 and the positioning grooves 644 are slidably engaged to limit the displacement stroke of the clamping block 66 on the first lifting block 641 .

[0052] Furthermore, the vertical shadow of the pressure head 65 covers the inclined block 663 .

[0053] like Figure 10 As shown in the left middle picture, the pressure head 65 and the clamping block 66 are schematic diagrams viewed from a right angle.

[0054] like Figure 10 As shown in the middle picture, the pressing head 65 and the clamping block 66 are schematic diagrams from a rear view angle. From this perspective, the part of the horizontal end of the pressing head 65 extending beyond the vertical end covers the oblique block 663.

[0055] like Figure 10As shown in the right figure in the middle, the indenter 65 and the clamping block 66 are shown in a left view schematic diagram. From this perspective, the width of the top end of the inclined block 663 does not exceed half of the transverse width of the indenter 65.

[0056] It can be seen from this that when the clamping block 66 is displaced downward in advance, its tip will force the separation between the end coil and the penultimate coil of the variable-diameter spring, that is, force the pitch here to increase temporarily, and isolate the end coil and the penultimate coil of the variable-diameter spring, preventing the indenter 65 from touching the penultimate coil of the variable-diameter spring during the downward pressing process. At the same time, the design of the inclined block 663 will also cause the wire of the end coil of the variable-diameter spring to displace to the center at the bottom end of the indenter 65 during the extrusion process, forcing the wire of the end coil of the variable-diameter spring not to deviate to one side of the indenter 65 during the downward pressing process of the indenter 65, and improving the stability during the cutting process.

[0057] In a specific embodiment of the present application, a fifth telescopic member 67 is fixedly connected to the fixed seat 63. The fifth telescopic member 67 is used to drive the clamping block 66 to displace radially along the tool head 11. Specifically, a connecting block 671 is fixedly connected to the piston end of the fifth telescopic member 67, and the connecting block 671 is fixedly connected to the clamping block 66; a sixth telescopic member 68 is fixedly connected to the mounting frame 1. The sixth telescopic member 68 is used to drive the sliding seat 61 to displace axially along the tool head 11 on the mounting frame 1.

[0058] The following describes the use process of a variable-diameter spring processing device according to an embodiment of the present application with reference to the accompanying drawings:

[0059] The wire used to produce the variable-diameter spring is conveyed towards the tool head 11 by the straightening mechanism 3. The variable-diameter rods 51 on the two variable-diameter mechanisms 5 force the wire to curl, and the change in the diameter of the spring is realized by the displacement change of the variable-diameter rods 51. At the same time, the pitch of the spring is adjusted by the pitch change mechanism 4 to realize the production and processing of the variable-diameter spring. After processing and forming, the piston end of the fifth telescopic member 67 is displaced to drive the clamping block 66 to displace downward, and the tip (the inclined surface portion 662 and the inclined block 663) of the clamping block 66 is inserted between the end coil and the penultimate coil of the variable-diameter spring. At this time, no matter how small the pitch between the variable-diameter springs is, the clamping block 66 can realize the insertion action and separate the end coil and the penultimate coil of the variable-diameter spring. Then, the piston end of the fourth telescopic member 62 is displaced to drive the indenter 65 to displace downward, press against the end coil of the variable-diameter spring, and cooperate with the tool head 11 and the continuously downward-displacing indenter 65 to form a cutting action. During this process, the indenter 65 forms a separate coverage of the end coil of the variable-diameter spring, and will not cause pressing or wear on the penultimate coil of the variable-diameter spring. At the same time, the inclined block 663 of the clamping block 66 also forces the end coil of the variable-diameter spring to displace towards the center of the indenter 65, preventing the end coil of the variable-diameter spring from disengaging from the indenter 65, improving the cutting effect and the production quality of the variable-diameter spring.

[0060] In the related art, for a variable-diameter spring processing device, during the cutting process, the steel wire at the tool head 11 has a certain reset tendency due to twisting. At the moment of cutting, the steel wire will rebound towards the variable-diameter rod 51 due to reset. The violent reset of the steel wire will cause violent shaking, further resulting in detachment and misalignment between the steel wire and the variable-diameter rod 51. In subsequent production, the steel wire also needs to be clamped on the groove at the end of the variable-diameter rod 51 to achieve the variable-diameter operation in spring production. This will increase the workload and reduce the production efficiency.

[0061] Embodiment 2. According to some embodiments of the present application, as Figure 1 、 Figure 11 and Figure 12 shown, an auxiliary mechanism 7 is fixedly connected to the bottom end of the fixed seat 63. The auxiliary mechanism 7 is located on the side of the pressure head 65 facing the variable-diameter mechanism 5. The auxiliary mechanism 7 includes an elastic assembly 71 and a limit cover 72. The elastic assembly 71 is fixedly connected to the fixed seat 63, and the limit cover 72 is fixedly connected to the elastic assembly 71. The limit cover 72 is used to clamp the steel wire of the tail coil of the variable-diameter spring.

[0062] Specifically, the elastic assembly 71 includes a fixed cylinder 711, a sliding rod 712, and a first spring 713. The fixed cylinder 711 is fixedly connected to the fixed seat 63; the sliding rod 712 is limited and slidably inserted into the fixed cylinder 711; the first spring 713 is arranged inside the fixed cylinder 711, and the first spring 713 abuts against the sliding rod 712.

[0063] It should be noted that in the specific embodiments of the present application, the sliding rod 712 can only axially displace and cannot rotate inside the fixed cylinder 711.

[0064] Specifically, the limit cover 72 is fixedly connected to one end of the sliding rod 712 extending out of the fixed cylinder 711. The limit cover 72 is arc-shaped and is arranged along the radial direction of the tool head 11.

[0065] Furthermore, two arc-shaped blocks 721 are symmetrically and fixedly connected inside the limit cover 72. The arc-shaped blocks 721 are arranged along the axial direction of the limit cover 72, and an arc-shaped notch 722 is provided at the bottom end of the arc-shaped blocks 721.

[0066] In the specific embodiments of the present application, in the initial state, the limit cover 72 is located above the tool head 11 and is used to clamp the steel wire. Because it has the function of elastic displacement, it can be applied to the clamping of steel wires of different thicknesses. Specifically, it is clamped on the upper side of the steel wire through the arc-shaped notch 722 at the bottom end of the arc-shaped block 721. In this way, when the variable-diameter spring is processed and cut, the steel wire is elastically pressed from above by the arc-shaped block 721, and the steel wire will not reset instantaneously. If the elastic force of the steel wire reset is greater than the elastic pressing force of the arc-shaped block 721, then after cutting, the steel wire will force the limit cover 72 to displace upward, and the steel wire will gradually separate from Figure 12The arc-shaped notch 722 on the left side moves between the two arc-shaped blocks 721 and then disengages from the limiting cover 72 through the arc-shaped notch 722 on the right side. At this time, since the limiting cover 72 has a reset buffer effect on the steel wire, the steel wire moves towards Figure 1 the reset force in the direction of the upper variable-diameter rod 51 in the middle is greatly weakened, and the shaking ability of the steel wire decreases. Through the elastic buffer design, the phenomenon of disengagement between the cut steel wire and the variable-diameter rod 51 can be avoided, and the processing efficiency of the variable-diameter spring can be improved.

[0067] In the related art, for this variable-diameter spring processing device, although the coverage range of the pressing head 65 on the steel wire used for producing the variable-diameter spring can be increased by the displacement of the sliding seat 61 on the mounting frame 1, once the coverage range of the pressing head 65 is smaller than the width of the steel wire, a normal cutting action cannot be achieved.

[0068] Embodiment 3. According to some embodiments of the present application, as Figures 13 - 15 shown, the second lifting block 642 and the first lifting block 641 are detachably connected (specifically, a bolt connection method can be adopted). A quick-release mechanism 8 is arranged in the second lifting block 642. The quick-release mechanism 8 includes a limiting plate 81 that moves radially along the tool head 11. A positioning rod 82 is fixedly connected to the limiting plate 81, and a second spring 83 is sleeved on the positioning rod 82.

[0069] Among them, a through groove 645 is arranged at the bottom end of the second lifting block 642, and an installation cavity 646 is arranged in the second lifting block 642. The installation cavity 646 is communicated with the through groove 645, and a limiting block 647 is arranged in the installation cavity 646; a deformation cavity 648 communicated with the installation cavity 646 and a through groove 649 communicated with the deformation cavity 648 are also arranged in the second lifting block 642. The diameter of the deformation cavity 648 is larger than the diameter of the through groove 649.

[0070] Specifically, the installation rod 651 slides in the through groove 645, and one end of the installation rod 651 extends into the installation cavity 646 and abuts against the limiting block 647 to realize the axial limit of the installation rod 651.

[0071] Furthermore, the limiting plate 81 is arranged in the installation cavity 646 and is slidably matched with the limiting block 647. One end of the positioning rod 82 is slidably inserted into the through groove 649, and one end of the second spring 83 extends into the deformation cavity 648. As Figure 14 shown, when the limiting plate 81 moves upward to create a displacement space for the installation rod 651, the second spring 83 is compressed towards the inside of the deformation cavity 648.

[0072] Thus, in specific use, after the used indenter 65 fails to fully cover the steel wire, the second lifting block 642 is removed from the first lifting block 641, and then the displacement limiting plate 81 is moved upward to squeeze the second spring 83. At this time, there is nothing in the installation cavity 646 to limit the installation rod 651. Therefore, the entire indenter 65 is directly removed along the length direction of the through groove 645. Then, a suitable indenter 65 is replaced and moved into the installation cavity 646 through the through groove 645, and the top end of the installation rod 651 is moved to the bottom side of the limiting block 647 to achieve the radial positioning of the indenter 65 relative to the cutter head 11. Then, the displacement limiting plate 81 is released. Under the reset action of the second spring 83, the displacement limiting plate 81 is moved to the bottom side of the installation cavity 646 and limits the installation rod 651 along the length direction of the through groove 645. Finally, the second lifting block 642 is fixed back to the first lifting block 641, so as to realize the rapid replacement of the indenter 65 and improve the applicable range of the entire device.

[0073] It should be noted that the specific model specifications of the driving mechanism 2, the straightening mechanism 3, the linear displacement assembly 41, the driving motor 42, the driving gear 421, the driven rack 441, the first telescopic member 52, the second telescopic member 55, the third telescopic member 56, the fourth telescopic member 62, the fifth telescopic member 67, the sixth telescopic member 68, the first spring 713 and the second spring 83 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0074] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A variable-diameter spring processing device, comprising a mounting frame (1), on which a cutter head (11), a driving mechanism (2), a straightening mechanism (3), a pitch changing mechanism (4), a variable-diameter mechanism (5) and a cutting mechanism (6) are arranged, characterized in that: The pitch changing mechanism (4) makes a displacement action of approaching and moving away relative to the mounting frame (1); The variable-diameter mechanism (5) makes a displacement action of approaching and moving away relative to the mounting frame (1), and the variable-diameter mechanism (5) realizes an angular change on the mounting frame (1); The cutting mechanism (6) includes a sliding seat (61), a fixed seat (63), a lifting assembly (64), a pressing head (65) and a clamping block (66). The sliding seat (61) displaces axially along the cutter head (11), the fixed seat (63) is fixedly connected to the sliding seat (61), the lifting assembly (64) is slidably matched with the fixed seat (63), the lifting assembly (64) displaces radially along the cutter head (11), the pressing head (65) is fixedly connected to the lifting assembly (64), the clamping block (66) is slidably matched with the lifting assembly (64), and the clamping block (66) displaces radially along the cutter head (11); On one side of the clamping block (66) away from the pressing head (65), there is an inclined surface part (662), and on one side of the clamping block (66) facing the pressing head (65), there is an inclined block (663). The inclined block (663) and the inclined surface part (662) make one end of the clamping block (66) facing the cutter head (11) be pointed; At the bottom end of the fixed seat (63), an auxiliary mechanism (7) is fixedly connected. The auxiliary mechanism (7) is located on the side of the pressing head (65) facing the variable-diameter mechanism (5). The auxiliary mechanism (7) includes an elastic component (71) and a limiting cover (72). The elastic component (71) is fixedly connected to the fixed seat (63), the limiting cover (72) is fixedly connected to the elastic component (71), and the limiting cover (72) is used for clamping the steel wire of the tail coil of the variable-diameter spring; The elastic component (71) includes a fixed cylinder (711), a sliding rod (712) and a first spring (713). The fixed cylinder (711) is fixedly connected to the fixed seat (63), the sliding rod (712) is limited and slidably inserted into the fixed cylinder (711), the first spring (713) is arranged in the fixed cylinder (711), and the first spring (713) abuts against the sliding rod (712); The limiting cover (72) is fixedly connected to one end of the sliding rod (712) extending out of the fixed cylinder (711). The limiting cover (72) is arranged in an arc shape and is arranged radially along the cutter head (11); Two arc-shaped blocks (721) are symmetrically and fixedly connected in the limiting cover (72). The arc-shaped blocks (721) are arranged axially along the limiting cover (72), and an arc-shaped notch (722) is arranged at the bottom end of the arc-shaped block (721).

2. The variable-diameter spring processing device according to claim 1, wherein, The pitch changing mechanism (4) includes: Linear displacement component (41), the linear displacement component (41) is fixedly connected to the mounting bracket (1); Drive motor (42), the drive motor (42) is fixedly connected to the displacement end of the linear displacement component (41); Base (43), the base (43) is slidably connected to the mounting bracket (1), the output shaft of the drive motor (42) penetrates through the base (43) and is key-connected with a driving gear (421), and the driving gear (421) is rotatably connected to the base (43); Pitch adjustment block (44), the pitch adjustment block (44) is slidably installed in the base (43) along the radial direction of the cutter head (11), a driven rack (441) is arranged on one side of the pitch adjustment block (44), and the driven rack (441) meshes with the driving gear (421).

3. The variable-diameter spring processing device according to claim 1, characterized in that, There are two variable diameter mechanisms (5) arranged symmetrically, and the two variable diameter mechanisms (5) have the same structure and size. The variable diameter mechanism (5) includes a variable diameter rod (51), a first telescopic member (52), a mounting block (53), a connecting seat (54), a second telescopic member (55) and a third telescopic member (56). The variable diameter rod (51) is coaxially and fixedly connected to the piston end of the first telescopic member (52). The first telescopic member (52) is fixedly connected to the mounting block (53) for controlling the radial displacement of the variable diameter rod (51) along the cutter head (11). An arc-shaped groove (12) is arranged on the mounting bracket (1). The connecting seat (54) penetrates through the arc-shaped groove (12). The mounting block (53) is slidably sleeved on the connecting seat (54). The second telescopic member (55) is rotatably connected to the mounting bracket (1) and is fixedly connected to the connecting seat (54). The second telescopic member (55) is used for controlling the displacement of the connecting seat (54) along the arc-shaped groove (12). The third telescopic member (56) is fixedly connected to the connecting seat (54), and the piston end of the third telescopic member (56) slidably penetrates through the connecting seat (54) and is fixedly connected to the mounting block (53).

4. A variable-diameter spring processing device according to claim 1, characterized in that, 5. The variable-diameter spring processing device according to claim 1, characterized in that, A fourth telescopic member (62) is fixedly connected to the sliding seat (61), and the fourth telescopic member (62) is used for driving the lifting component (64) to displace along the radial direction of the cutter head (11).

6. The variable-diameter spring processing device according to claim 5, characterized in that, A sliding groove (631) is arranged in the fixed seat (63), the lifting component (64) slides in the sliding groove (631), the lifting component (64) includes a first lifting block (641) and a second lifting block (642), the second lifting block (642) extends out of the sliding groove (631), and a communicating sliding cavity (643) is arranged on the same side of the first lifting block (641) and the second lifting block (642). Positioning grooves (644) are symmetrically arranged in the sliding cavity (643) on the first lifting block (641). The pressing head (65) is arranged in an L shape, and a mounting rod (651) is fixedly connected to one end of the pressing head (65).

7. The variable-diameter spring processing device according to claim 5, wherein, Two positioning bars (661) are symmetrically and fixedly connected to one end of the clamping block (66) away from the inclined surface portion (662) and the inclined block (663), and the positioning bars (661) are in sliding fit with the positioning grooves (644).

8. The variable-diameter spring processing device according to claim 1, characterized in that, The vertical shadow of the pressing head (65) covers the inclined block (663).

9. The variable-diameter spring processing device according to claim 1, characterized in that, A fifth telescopic member (67) is fixedly connected to the fixed seat (63), and the fifth telescopic member (67) is used to drive the clamping block (66) to displace radially along the tool bit (11).

10. A variable-diameter spring processing device as described in claim 1, characterized in that, A sixth telescopic member (68) is fixedly connected to the mounting bracket (1), and the sixth telescopic member (68) is used to drive the sliding seat (61) to displace axially along the tool bit (11) on the mounting bracket (1).

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